News- Suzhou Wellhong Electric Co., Ltd.

2022.09.21

What are the principles of selection of stamping die materials

Stamping die is a special process equipment that processes materials (metal or non-metal) into parts (or semi-finished products) in cold stamping, called cold stamping die (commonly known as cold stamping die).In the stamping die, the stamping die factory uses various metal materials and non-metallic materials, mainly carbon steel, alloy steel, cast iron, cast steel, cemented carbide, low melting point alloy, zinc-based alloy, aluminum bronze, synthetic resin, Polyurethane rubber, plastic, etc.Materials used to make molds are required to have high hardness, high strength, high wear resistance, appropriate toughness, high hardenability, no deformation (or less deformation) during heat treatment, and resistance to cracking during quenching.The key to ensure the life of the die is to select the die material reasonably and implement the correct heat treatment process for the stamping die factory.For molds with different uses, they should be comprehensively considered according to their working conditions, stress conditions, properties of processed materials, production batches and productivity, etc., and focus on the performance of the above requirements, and then make decisions on steel grades and heat treatment. The corresponding selection of the process.When the production batch of stamping parts is large, die steel with high quality and good wear resistance should be selected as the material of the working parts of the die. For the other process structural parts of the mold and the part materials of the auxiliary structural parts, it should also be improved accordingly. When the batch size is not large, the material performance requirements should be appropriately relaxed to reduce the cost.When the material to be stamped is hard or has a large deformation resistance, the convex and concave dies of the die should be selected from materials with good wear resistance and high strength. When deep drawing stainless steel, aluminum bronze die can be used because it has better resistance to sticking.The guide post and guide bush require wear resistance and good toughness, so the surface carburizing and quenching of low carbon steel is mostly used. For another example, the main disadvantage of carbon tool steel is poor hardenability. When the section size of the die parts is large, Its center hardness is still low after quenching, but when working on a press with a large number of strokes, its impact resistance is an advantage.For fixing plate, stripper plate and other parts, not only must have sufficient strength, but also require small deformation during the working process. In addition, cold and cryogenic treatment, vacuum treatment and surface strengthening can be used to improve the performance of mold parts. For cold extrusion dies with poor working conditions of convex and concave dies, metal dies should choose die steel with good comprehensive mechanical properties such as sufficient hardness, strength, toughness, wear resistance, etc., as well as certain red hardness and thermal fatigue strength, etc. .The hot and cold processability of the material and the current state of the plant should be considered.Pay attention to the use of micro-deformation die steel to reduce processing costs.For molds with special requirements, mold steel with special properties should be developed and used. The selection of mold materials should be determined according to the use conditions of mold parts, so as to select low-cost materials and reduce costs under the premise of meeting the main conditions.
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2022.09.14

Compression Model Heat Treatment: Fire Fire Engineering Illegal Production Transformation

Stamping die is a special process equipment that processes materials (metal or non-metal) into parts (or semi-finished products) in cold stamping, called cold stamping die (commonly known as cold stamping die).Stamping is a pressure processing method that uses a die installed on a press to apply pressure to a material at room temperature to separate or plastically deform it to obtain the desired parts.Practice has proved that the thermal processing quality of the mold has a great influence on the performance and service life of the mold. According to the analysis and statistics of the reasons for mold failure, the "accidents" of mold failure caused by improper heat treatment account for more than 40%.(1) Forging processThis is an important link in the manufacturing process of mold working parts. For the mold of high alloy tool steel, technical requirements are usually put forward for the metallographic structure such as the carbide distribution of the material.(2) Preliminary heat treatmentPreparatory heat treatment processes such as annealing, normalizing or quenching and tempering should be used depending on the material and requirements of the working parts of the mold to improve the structure, eliminate the organizational defects of the forging blank, and improve the processing technology. After proper preparatory heat treatment, the high carbon alloy die steel can eliminate the reticulated secondary cementite or chain carbide, make the carbide spheroidized and refined, and promote the uniformity of carbide distribution, which is conducive to ensuring quenching and tempering. quality, improve mold life.(3) Quenching and temperingThis is the key link in the heat treatment of the mold. If overheating occurs during quenching and heating, it will not only cause greater brittleness of the workpiece, but also easily cause deformation and cracking during cooling, which will seriously affect the life of the mold. When the die is quenched and heated, special attention should be paid to preventing oxidation and decarburization, and the heat treatment process specification should be strictly controlled. When conditions permit, vacuum heat treatment can be used. After quenching, it should be tempered in time, and different tempering processes should be adopted according to technical requirements.(4) Stress relief annealingAfter rough machining, the working parts of the mold should be subjected to stress relief annealing treatment. The purpose is to eliminate the internal stress caused by rough machining, so as to avoid excessive deformation and cracks during quenching. For molds with high precision requirements, stress relief tempering is required after grinding or electrical machining, which is conducive to stabilizing mold accuracy and improving service life.
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2022.09.07

What are the advantages of stamping die production process

The level of mold technology is an important indicator to measure the level of a country's manufacturing industry. With the further development of my country's industry, the mold industry is required to develop in the direction of large-scale, precise, efficient and multi-functional. One of the important ways is to combine mold and automation. .The key to the development of stamping dies is die manufacturing technology, die materials and die talents. The development of die technology is a key factor in the development of die industry. Its development goal is to meet the requirements of short delivery time, high precision, good quality and low price of die products. , One of the important directions is to vigorously develop mold automation.The automation development related to stamping dies is to combine traditional dies with opto-electromechanical technology, integrate multi-process automation modules into the dies, and realize full continuous die production through electrical control, thereby saving a lot of machines and manpower and maximizing efficiency. Process optimization, maximize benefits.Stamping refers to the process of installing a mold on a punching machine and passing a plate-shaped material between the molds, the stamping force deforms, cuts, bends, and forms the material. The stamping processes that can realize automatic processing include: hardware riveting, tapping Wire, self-riveting and mutual-riveting products, and integrated production of small components.The stamping process is widely used in the market because of its good interchangeability, material saving, and parts with thin walls, light weight, good rigidity, high surface quality and complex shapes that are difficult to manufacture by other processing methods. The production of stamping dies is manual, which greatly restricts its development.
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2022.09.02

What Is Auto Parts Mould

When making parts for a car, the best way to create quality products is to use injection molding. Automotive parts have high quality and safety requirements, and injection molding is an irreplaceable advantage in the production process. Injection molding is an ideal solution for manufacturing plastic structural components. It can also be used for parts that are not usually injection molded, such as fluid handling plastic structural components. Plastic injection molding While metal and steel are traditionally associated with the automotive industry, plastic is becoming increasingly important in car manufacturing. Plastics are stronger and more durable than metal, and have many other advantages. Moreover, consumers today have a different set of expectations for their vehicles, and plastic injection molding is an excellent way to meet these expectations. Injection molding is an excellent option for automakers who want to manufacture high-quality parts at low costs. It allows companies to create intricate and complex designs with greater ease. The process also scales well for mass production and allows manufacturers to run tens of thousands of items through a mold at once. Injection molding uses high-pressure injection to shape polymer into desired shapes. Depending on the application, moulds can have single or multiple cavities. A single cavity mould can produce identical parts while multiple cavities can produce parts with different geometries. Tool steel moulds are typically used for injection molding, but stainless steel or aluminium moulds are also popular options. Die-casting Die-casting is a process used in making components used in autos and other vehicles. The production of these components is highly dependent on the materials used. Some of these materials are softer than others. For example, cast iron cannot sustain high pressures and it requires a special die. This type of die is expensive and requires significant start-up expenses. Another material commonly used in auto parts is magnesium, a lightweight metal with excellent strength-to-weight ratio. Because magnesium is naturally occurring, its abundance makes it an environmentally friendly option. Moreover, it can be recycled without leaving any traces behind. Die-casting for automobile parts can be done using cold chamber or hot chamber die-casting machines. Which process you choose will depend on the size and complexity of the parts. Some key players in the market include Altizon Inc., Endurance Technologies Ltd., and Georg Fischer Limited. These companies are involved in the production of complex die-cast parts and system components. Some of these companies also produce automotive-related machinery. Overmolding Overmolding is a process that involves combining different materials to form an automotive part. It is important to choose the correct material for a specific application. The adhesion between the material and substrate depends on three factors: surface texture, resin compatibility and surface treatment. A custom injection molder can guide you through these considerations and choose the right material for your application. Overmolded parts are stronger and more durable than non-moulded ones. This manufacturing process also eliminates the need for secondary operations, extra adhesives, and fasteners. The process saves a great deal of time and money, and is also highly convenient. In addition, overmolded parts have a protective layer of thermoplastic material that is flexible and durable. Overmolding can also help improve fuel efficiency and reduce vehicle weight. The process of replacing metal parts with plastic is one of the most efficient ways to make vehicles lighter. However, replacing heavy metal parts with plastic can be challenging, especially when they need to have high strength. Heavy metal parts require more expensive production processes and increase vehicle weight. Using overmolding, however, can solve this problem. Overmolding with polypropylene When overmolding with polypropylene, there are a few factors that must be considered to ensure that the end result meets all design requirements. The material's chemical and physical properties must match those of the substrate. In other words, the material cannot be molded directly onto stainless steel or a similar substrate. To get the best results from the overmolding process, you must first understand the function of the part. In most cases, the primary function is to provide a proper seal. However, it is also important to consider how the part will be exposed to UV light and harsh chemicals. Once you know where the part will be used, you can select a material that will not be damaged by harsh chemicals or UV light. To determine the ideal temperature range for overmolding with polypropylene, we first conducted a numerical simulation. In this simulation, we simulated a two-step molding process and determined the optimum mold temperature. This temperature was chosen so that the temperature gradients along the melt flow path would be the least. This information was then used to make design modifications.
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2022.08.25

Die test problem of automobile stamping die

1. Pay attention to the selection of mold steelThis is the most important step to improve the quality of mold steel. Many factors need to be considered, including: the selection of mold steel materials, the usability and safety of mold steel structures, the machinability of mold steel parts, and the convenience of mold steel maintenance. These should be considered as thoroughly as possible at the beginning of the design.①The selection of mold steel materials should not only meet the customer's requirements for product quality, but also consider the cost of the material and its strength within the set period. , the main failure mode and other factors to select materials.② When designing the mold steel structure, try to make the structure as compact and easy to operate as possible, and ensure that the mold steel parts have sufficient strength and rigidity; when the mold steel structure allows, the corners of each surface of the mold steel parts should be designed as rounded transitions as much as possible. In order to avoid stress concentration; for the concave mold, cavity and part of the punch and core, the combination or mosaic structure can be used to eliminate the stress concentration; for the slender punch or core, appropriate protection measures should be taken in structure; Cold punching dies should be equipped with devices to prevent clogging of parts or waste (such as ejector pins, compressed air, etc.). At the same time, it is also necessary to consider how to reduce sliding fittings and frequent impact parts, which will cause wear and tear in long-term use. Influence on the quality of die steel.③In the design, it is necessary to reduce the scope of disassembly and assembly when a certain component is repaired, especially when the wearing parts are replaced, the scope of disassembly and assembly should be reduced as much as possible.2. Pay attention to the machining accuracy of the manufacturing processThis is also an important part of ensuring the quality of mold steel. The processing method and machining accuracy in the manufacturing process of mold steel will also affect the service life of mold steel.The accuracy of each component directly affects the overall assembly of the mold steel. In addition to the influence of the accuracy of the equipment itself, it is necessary to improve the processing method of the parts and improve the technical level of the fitter in the grinding and matching process of the mold steel to improve the mold steel parts. If the overall assembly effect of the mold steel does not meet the requirements, the probability of the mold steel moving in an abnormal state during the mold test will increase, which will have a great impact on the overall quality of the mold steel.In order to ensure that the mold steel has good original precision - the original mold steel quality, in the manufacturing process, first of all, it is necessary to reasonably select high-precision processing methods, such as EDM, wire cutting, CNC machining, etc. At the same time, attention should be paid to the quality of the mold steel. Accuracy inspection, including machining accuracy and assembly accuracy of mold steel parts, and comprehensive inspection of mold steel accuracy through mold trial acceptance. During inspection, it is necessary to use high-precision measuring instruments as much as possible. For those mold steel parts with complex surface and curved surface structures, if ordinary rulers and vernier cards cannot achieve accurate measurement data, then three-coordinate measurement is required. Instruments and other precision measuring equipment to ensure the accuracy of the measurement data.3. Surface strengthening forming partsThis can improve the wear resistance of the surface of the mold steel parts, thereby better improving the quality of the mold steel.For surface strengthening, different strengthening methods should be selected according to the mold steel used for different purposes. In addition, a technology called FCVA vacuum diamond coating developed in recent years can form a layer on the surface of the part that is extremely strong and combined with the matrix. A very smooth, uniform and dense protective film, this technology is especially suitable for the protective treatment of the surface of the mold steel, and it is also an effective method to improve the quality of the mold steel.4. Correct use and maintenance of moldsThe installation and debugging method of the mold should be appropriate, and the parameters of the CNC bending machine should be consistent with the design requirements and so on.When using the mold correctly, it is also necessary to carry out regular maintenance on the mold. The guide posts, guide sleeves and other parts with relative motion of the mold should be frequently filled with lubricating oil; for forging molds, plastic molds, die-casting molds and other molds, in Before each mold is formed, lubricant or mold release agent should be sprayed on the surface of the formed parts;Planned preventive maintenance of the mold and data processing in the maintenance process can prevent possible problems in the production of the mold and improve the efficiency of maintenance work.
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2022.08.17

The Four E's of a Medical Equipment Mould

A medical equipment mould is a crucial component of a variety of medical devices. The process of mould making is not simple, however. It must be performed in a controlled environment. There are several factors to consider, including product safety, quality, and timeliness. These factors should be taken into account to ensure that your medical equipment mould is of the highest possible standard. Class III medical devicesThe strictest regulatory standards in the industry apply to class III medical equipment, including implantable pacemakers, continuous glucose monitors, and other such devices. Typically, moulding for these products is done in cleanrooms that prevent the contamination of the components through airborne particulate matter. But, the cleanroom requirements can be prohibitively expensive, and the process also requires skilled personnel to meet the necessary quality standards. Fortunately, there are a number of ways to maintain quality standards.The manufacturing facility must meet certain standards, including the ISO 13485:2003 standard. It must also adhere to biocompatibility regulations, including USP Class VI biocompatibility, and ISO 10993:2003. These standards include a detailed list of control procedures, including risk management and lot traceability. The FDA has classified medical devices into three classes according to the level of risk associated with each one. Molding for these devices is done using post-processing operations that can help ensure continuous compliance.Medical equipment moulds are often quite complex, with intricate details that should not be overlooked. From cardiac EKG machines to IV pumps, surgical carts to housings for oxygen and IV pumps, this type of moulding requires a highly skilled engineering team to ensure that each part meets the standards set by the FDA. By applying the highest standards, manufacturers can ensure the safety of their products and minimize the risk of contamination. They also want to ensure their products are manufactured as cleanly as possible to minimize any damage they can cause to patients.Class II medical devicesWhen looking for a moulder, consider the following: environment, processes, and quality. Are you able to transition seamlessly from prototype to initial production and from low-volume to high-volume production? Can you maintain quality standards and customer satisfaction during this transition? These are the four E's that are most important for medical molders. Read on to learn more about the specific challenges facing the industry. Then, select a moulder who is capable of meeting these challenges.Cleanroom environment: When a molder uses a cleanroom, the process is highly regulated. Cleanrooms are important for producing Class II medical equipment because they protect against airborne particles. Injection molding processes should be ISO 7 or ISO 8, which means a minimum of 10,000 pollution particles per cubic meter. ISO 8 cleanrooms are also the most stringent. Cleanrooms are also necessary for manufacturing Class II medical devices.Lubrizol Life Science Health: A contract molder that specializes in scientific injection molding has the knowledge and expertise to produce high-quality products. This includes everything from material selection to clean room packaging. The company started out as a small molder with limited resources and has expanded into one of the largest medical equipment parts manufacturers in the country. Its extensive capabilities and experience in this area allow it to meet even the most complex needs of medical equipment manufacturers.Class I medical devicesThe manufacturing process for Class I and II medical devices is very similar. In addition to moulding the plastic parts, these companies also need to meet rigorous quality standards and strict regulatory requirements. This consists of many steps, including the selection of engineering materials, quality management systems and cleanrooms. In addition, a high-skilled workforce is essential. In addition, the Four E's are used to define the standards that must be met in the manufacturing process.The process and materials for producing medical devices must be standardized and adhere to ISO regulations. This process is suited to manufacturing high-volume, complex components. It is also efficient, yields excellent results, and is capable of a rapid turnaround. In addition, it offers a wide range of materials that can be used to manufacture Class I medical equipment moulds. The advantages of medical injection molding are numerous. For instance, a medical injection mold can be used for prototyping.
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2022.08.11

Choosing the Right Auto Parts Mould

Choosing the right Auto parts mould is critical to the success of any automotive manufacturing business. The characteristics of the plastic raw materials, the injection molding machine, and the process used in the manufacturing process all influence the quality of the end product. With this in mind, Kemal's professional technical staff provides excellent design solutions for the automotive mould's structure. The material is selected based on the toughness and stability properties of the material and the professional operators control the injection pressure and speed to achieve a high level of accuracy.High-quality plastic injection moldsAutomotive OEMs are increasingly turning to high-quality plastic injection molds for automotive parts. This conversion helps vehicles achieve higher fuel efficiency and reduce weight, while also meeting emissions standards and operational cost reductions. Injection molded parts are essential for auto parts, since automotive operating environments can be harsh and contain high levels of chemicals. These parts must also meet high levels of quality and performance. Listed below are some characteristics of high-quality plastic injection molds for auto parts.The main advantage of automotive injection molding is its ability to produce parts of high quality with simple geometries. Moreover, manufacturers can customize the surface finish of their auto parts by adding surface textures or applying color directly to the mold. Automotive injection molding also enables color modification. It allows dye to be mixed with the raw material pellets for a solid color after molding. A wide variety of colors and finishes are possible with this process, making it an excellent choice for carmakers looking to create automotive-grade parts.High surface finishTo produce a high-quality auto part, the surface finish on the mould must be of a high standard. This finish may not be as important as you might think, as it does not directly affect the look of the final product. However, it can affect the flow of material into the mold. A poor surface finish can prevent the material from reaching all the parts, causing them to prematurely cure and crack. Ultimately, this may result in an unsatisfactory finished product.A good surface finish affects the part's function and cosmetic appearance. It also limits the tool steel's ability to produce a smooth or high-gloss finish. For example, a high-gloss finish would hide minor molding imperfections, while a rough surface would be more difficult to release from the mould. To reduce this problem, the surface finish should be of high quality. For this reason, the toolmakers and designers should coordinate closely during the design phase to ensure a good finish.DurabilityThe modern automotive industry requires more complicated automotive parts than ever before, from sophisticated aerodynamics to fuel-efficient engines. Injection-molded parts have played a critical role in reducing vehicle weight, contributing to a decrease in fuel consumption. With their high durability and light weight, plastics are increasingly being used as a substitute for metal, which is heavy and unreliable. In addition to these benefits, plastics are cheaper and more lightweight than metal, making them a great choice for car makers.In addition to the ability to produce durable and accurate products, auto parts moulds also require high-precision inspection equipment. Online inspection technology ensures dimensional accuracy of products made by an automotive mould. A hot runner or sequential injection technology improves mold productivity and quality while saving raw materials and reducing waste. This technology is the only one on the market that offers such advanced features. Kemal Automotive Solutions' engineers have the knowledge and experience to ensure the durability and quality of your automotive molds.ScalabilityThe automotive industry requires high-quality plastic injection moulds. These moulds are used to produce metal, thermoplastic and other automotive parts. Thanks to advancement in technology, auto parts mould production can now be more precise than ever. Three-dimensional drawings provided by manufacturers help them to keep to the exact specifications. This ensures that the finished products meet all the design criteria. For this reason, the scalability of auto parts mould is of paramount importance.The productivity of the mold depends on the sprue bushing, runner and gate design, cooling, and ejection. The design of these components affects cycle time and part quality. Runner and gate design and cooling is one of the most important areas of auto parts mould design. Injection molding is highly scalable and offers a cost-effective solution for mass-production. China injection molds are one of the best options for low-cost manufacturing.BrandingThe process of creating a brand new mould involves several steps. An auto parts mould is used to create the various components of a car. A large investment in the mold is paid off by only financing the materials. The up-front cost of a mould will often pay for itself after only a few runs of product. The cost of materials can be quite costly, so many auto manufacturers choose to invest in a custom mold. In the process of creating a custom auto part mould, a company can get a unique shape for their products and a logo that represents them.To ensure the quality of your branded car parts mould, it is important to ensure that the moulds are manufactured to the highest standards. Bluestar has a team of nearly 100 staff members who specialize in mould design and engineering. They also provide after-sales service and quality inspection. Several companies even offer an ERP system that facilitates their processes. In addition to this, they use CAD software and computer imitation to assist in design.
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2022.08.05

Do you know these characteristics and advantages of stamping dies

The material types of stamping dies include steel, cemented carbide, steel-bonded cemented carbide, zinc-based alloys, low melting point alloys, aluminum bronzes, polymer materials, etc.At present, the materials of stamping dies are mainly steel, and the commonly used types are carbon tool steel, low alloy tool steel, high carbon and high chromium, medium carbon alloy steel, high speed steel, basic steel, cemented carbide, steel bonded cemented carbide, etc. .Features and advantages of stamping die:1. The number of parts completed by the stamping die per unit time is several times, even hundreds to thousands of times that of the general processing method. Moreover, the stamping process can use a combined processing method on a set of molds to further improve production efficiency.2. The products produced by the stamping die have the characteristics of stable quality, strong mechanical properties, compact structure, good interchangeability, good wear resistance, convenient maintenance and mass production.3. The material utilization rate of the stamping die is high, and a variety of layout methods can be used, such as cross, oblique, multi-row, mixing, nesting, etc., which can reduce the material cost of the product.4. Usually, there is no need to heat the material during the stamping process, which not only saves energy, reduces the occupation of heating equipment and venues, but also avoids product surface oxidation, burns and deformation caused by heating.5. Stamping dies are widely used and can solve operations that cannot or are difficult to complete by general processing methods, especially suitable for the processing of thin, soft, difficult and micro parts.
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2022.07.29

What are the classification of automobile molds according to the nature of the process

The most important part of the automobile mold is the cover mold. Such dies are mainly cold stamping dies. In a broad sense, "automotive molds" are the general term for molds that manufacture all parts of an automobile. For example, stamping molds, injection molds, forging molds, casting wax molds, glass molds, etc. What are the classification of automobile molds according to the nature of the process?a. Blanking die: A die that separates materials along a closed or open contour. Such as blanking dies, punching dies, cutting dies, incision dies, trimming dies, cutting dies, etc.b. Bending die: A die that bends and deforms sheet blanks or other blanks along a straight line (bending line) to obtain a workpiece with a certain angle and shape.c. Deep drawing die: It is a die that makes the blank of the sheet into an open hollow part, or further changes the shape and size of the hollow part.d. Forming die: It is a die that directly copies and forms the blank or semi-finished workpiece according to the shape of the convex and concave die, and the material itself only produces local plastic deformation. Such as bulging die, shrinking die, flaring die, undulating forming die, flanging die, shaping die, etc.Suzhou Wellhong Electric Co., Ltd. is a professional mould manufacturer. Some moulds are exported to Japan, Europe and the United States. We have the right to import and export the goods. We can develop and manufacture the moulds according to the needs of our customers. We pay attention to quality control, new project development, personnel training, team spirit. In recent years, we have established long-term business relationships with many well-known enterprises at home and abroad.
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2022.07.22

What should be paid attention to in plastic molds

1. Don't focus on product design and ignore plastic mould manufacturer.When some users develop products or trial production of new products, they often only focus on product research and development at the initial stage, ignoring the communication with the plastic mold making unit. After the product design plan is initially determined, contacting the mold manufacturer in advance has two advantages:1. It can ensure that the designed product has a good forming process, and the finalized design will not be modified because the parts are difficult to process.2. The mold maker can make design preparations in advance to prevent ill-consideration in a hurry and affect the construction period.3. To make high-quality plastic molds, only the close cooperation between the supply and demand sides can ultimately reduce the cost and shorten the cycle.Second, don't just look at the price, but consider the quality, cycle and service in all aspects.1. There are many types of molds, which can be roughly divided into ten categories. According to different requirements of parts material, physical and chemical properties, mechanical strength, dimensional accuracy, surface finish, service life, economy, etc., different types of molds are selected for forming.2. Molds with high precision requirements need to be processed by high-precision CNC machine tools, and mold materials and forming processes have strict requirements, and CAD / CAE / CAM mold technology needs to be used for design and analysis.3. Some parts have special requirements during molding, and the mold also needs to use advanced processes such as hot runner, gas-assisted molding, and nitrogen cylinder.4. Manufacturers should have CNC, EDM, wire cutting machine tools and CNC copy milling equipment, high-precision grinding machines, high-precision three-coordinate measuring instruments, computer design and related software.5. Generally, large-scale stamping dies (such as automobile cover molds) should consider whether the machine tool has a side blanking mechanism, or even side lubricant, multi-station progressive, etc. In addition to stamping tonnage, punching times, feeding devices, machine tools and mold protection devices should also be considered.6. The manufacturing methods and processes of the above-mentioned molds are not possessed and mastered by every enterprise. When choosing a cooperative manufacturer, you must understand its processing capabilities, not only by looking at hardware equipment, but also by combining management level, processing experience and technical strength.7. For the same set of molds, there is sometimes a big gap between the quotations of different manufacturers. You should not pay more than the value of the mold, nor less than the cost of the mold. Mold manufacturers, like you, want to make reasonable profits in their business. Ordering a set of molds at a much lower price can be the start of trouble. Users must start from their own requirements and comprehensively measure.Third, avoid multi-head cooperation, try to make plastic molds and product processing one-stop.1. With qualified molds (qualified test pieces), batches of qualified products may not be produced. This is mainly related to the selection of the machine tool for processing the parts, the forming process (forming temperature, forming time, etc.) and the technical quality of the operator.2. With a good mold, there is also a good forming process, preferably one-stop cooperation, and try to avoid multi-head cooperation. If the conditions are not met, it is necessary to choose one party to be fully responsible, and it must be written clearly when signing the contract.
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2022.07.15

Analysis of the causes and consequences of the gas produced by the mold

Why does the mold generate gas when making the product?①The material in the feeding system entrains gas or the air originally exists in the cavity, and the gas in the runner and cavity is not discharged in time during the forming process.②Insufficient drying in the resin contains water, which evaporates and becomes water vapor at the injection temperature.③ The injection temperature is high, and the plastic decomposes to generate gas.④ Some additives in the resin, volatilize or chemically react to generate gas (for example, when thermosetting plastics are formed, not only the plastic itself contains moisture and volatile components, but also a polycondensation reaction occurs during the curing process, resulting in condensation water and low-molecular-weight volatile gases).⑤ Residual gas in resin. Injection parts automotive Injection molding is a process that allows plastics to be molded with metal or ceramic inserts. These metal or ceramic inserts are placed in a mold and then melted plastic is injected to create a seamless piece. This type of molding is ideal for automotive applications because it reduces weight and utilizes metal to reduce operational costs. It is important to select the right mold for your needsm The type of steel you use will also determine the cost of the mold. Whether to customize: Yes Mold accuracy: ±10μm Mold life: 300,000~500,000 mold times Consequences of poor mold exhaust① The gas undergoes large compression to generate a back pressure, and this back pressure increases the resistance of the molten material to the filling flow, preventing the molten plastic from filling the mold normally and quickly, so that the mold cavity cannot be filled, resulting in unclear plastic edges.② There are obvious flow marks and weld seams on the product, and the mechanical properties of the product are reduced.③ After the gas is compressed, it will penetrate into the inner layer of the plastic, causing the plastic to produce surface quality defects such as silver streaks, pores, loose tissue, and delamination.④ After the gas in the cavity is compressed, heat is generated and the local temperature of the plastic rises, the plastic melt is decomposed and discolored, and even charred and carbonized.⑤ Poor exhaust, reducing the filling speed, increasing the cycle of forming parts (especially high-speed injection molding), seriously affecting productivity
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2022.07.08

Precautions for mold heat treatment

1) Strictly control the inherent quality of mold raw materials2) Improve the forging and spheroidizing annealing process, eliminate the network, ribbon and chain carbides, and improve the uniformity of the spheroidized structure.3) After machining or cold plastic deformation, the mold should be subjected to stress relief annealing (>600℃) before heating and quenching.4) For molds with complex shapes, asbestos should be used to block threaded holes, dangerous sections and thin walls should be wrapped, and graded quenching or isothermal quenching should be used.5) Annealing or high temperature tempering is required when repairing or refurbishing the mold.6) The mold should be preheated during quenching and heating, and pre-cooling measures should be taken during cooling, and an appropriate quenching medium should be selected.Breath collector upper cover moldAmong the best respiratory equipment available on the market is the Upper cover mould of the respirator. This type of mask is designed to keep the user cool while preventing him from breathing in toxic fumes. Its downward facing exhalation valve helps keep the lens fog-free so that the user can work without getting tired. When dealing with mold, the upper cover mould on the respirator is especially important. Mold Name Upper cover mould of respirator Product Material ABS Mold Steel for cavity NAK80 Mold Steel For Core NAK80 Steel For Base S50C Mold Estimated Size 230X200X231mm Mold Weight 60kg Press Machine Size 100T MOQ 1 Set Trade Terms FOB Payment Terms 50% prepayment before design making, 50% payment after final sample is confirmed. 7) The quenching heating temperature and time should be strictly controlled to prevent overheating and overburning of the mold.8) After the mold is quenched, it should be tempered in time, and the holding time should be sufficient. The high-alloy complex mold should be tempered 2-3 times.9) Select the correct grinding process and suitable grinding wheel.10) Improve the mold EDM process and perform stress relief tempering.
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