News- Suzhou Wellhong Electric Co., Ltd.

2022.07.01

Mold heat treatment precautions

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.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.Suzhou Wellhong Electric Co., Ltd. is a professional manufacturer of precision molds ， injection molding, assembling and silk-printing. Some moulds are exported to Japan, Europe and the United States. We have the right to import and export the goods. mold company 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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2022.06.23

Causes of quenching cracks in mold heat treatment

There are a lot of equipment in the heat treatment plant. The furnaces probably include box furnaces, pit furnaces, and box furnaces. Many heat treatments can be processed here, such as the heating process of annealing, normalizing and quenching, and tempering. These common heat treatment.Causes:1) There is serious segregation of network carbide in the mold material.2) There is mechanical processing or cold plastic deformation stress in the mold.3) Improper heat treatment operation of the mold (too fast heating or cooling, improper selection of quenching cooling medium, too low cooling temperature, too long cooling time, etc.).4) The mold has complex shape, uneven thickness, sharp corners and threaded holes, etc., which makes the thermal stress and tissue stress too large.5) The mold quenching heating temperature is too high to cause overheating or overburning.6) After the mold is quenched, the tempering is not timely or the tempering holding time is insufficient.7) When the mold is repaired and quenched, it is reheated and quenched without intermediate annealing.8) If the mold is heat treated, the grinding process is improper.9) During the EDM process after heat treatment of the mold, there are high tensile stress and microcracks in the hardened layer.Suzhou Wellhong Electric Co., Ltd. is a professional manufacturer of precision molds ， injection molding, assembling and silk-printing. 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. mould company 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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2022.06.16

Stamping process: what about die damage and card die

Stamping is one of the most useful processes for forming large quantities of parts. Die failure is a relatively simple problem in stamping production, which often causes production stoppage and affects the product production cycle. Therefore, it is necessary to find the cause of the mold failure as soon as possible and repair it reasonably.1. Mold damageMold damage refers to mold cracking, breaking, opening, etc. To solve the problem of mold damage, it is necessary to find the reasons from the design of the mold, the manufacturing process and the use of the mold. If the conditions such as foreign matter entering the mold, stacking of parts, and waste obstruction are not dealt with in time, and the processing is continued, it is easy to damage the blanking plate, punch, lower template and guide post of the mold.If the spring force is too small or the height of the sleeve is not equal, the spring will be cracked, the blanking plate will be skewed, and the stack will be punched and the parts will be damaged. If the quenching temperature of the mold is too high, the quenching method and time are not fair, as well as the number and temperature of tempering, and improper selection of elbows, the mold will be damaged after entering the stamping production. Improper fixing of the punch or insufficient strength of the screw will cause the punch to fall or break. The working height adjustment is too low, and the guide post is not smooth enough. Generally, the heat treatment process of the mold material has a great influence on it. If the size or depth of the blanking hole is not planned, it is easy to block the slot hole and cause damage to the blanking plate. When the mold is used, the position and direction of the parts are incorrectly installed or the bolts are not fastened properly. 2. Card moldThe main reasons for the die are as follows: the die guide is incorrect and skewed. Otherwise, it will expand the fault, resulting in damage to the mold. Forming mold deformation, for example, the hardness and thickness of the mold base and the template are too small, and they are easily deformed by external force; the mold orientation device is not accurate, and the positioning error of the upper and lower molds is out of tolerance. At this time, the strength of the punch should be advanced to enhance the guidance and maintenance of the stripper.Or the accuracy of the press is too poor, causing the mold to interfere; the strength of the punch is not good, and the size of the punch is too close, which makes the lateral force of the mold unbalanced. During the stamping process, once the mold clamping is insensitive or even stuck, it is necessary to stop production immediately to find out the cause of the stuck mold and eliminate the fault.3. RepairThe cost of die produced by stamping is high. The general die cost accounts for 1/5-1/4 of the total cost of the part. The one-time correction cost exceeds 70% of the original cost of the die, or the die life is approaching. When the mold repair technology is too complicated, the mold repair cost is too high, and the difficulty is high, the repair cycle will be too long, which will seriously affect the normal production of stamping. Generally speaking.After the mold is damaged, there is also a selection problem of repair and scrap. But. Therefore, repairing the mold in time to avoid damage to the mold can reduce the cost of the mold for stamping production. When the ties of the mold are severely damaged, sometimes the convex and concave molds are damaged together. This is because, in addition to the difficulty and high cost of mold making. Unnatural wear failure of stamping dies, such as damage to non-tie parts.Under normal conditions, the main failure mode of stamping die is excessive wear. Re-mould production and delivery. Until the burr of the punched parts is overrun, the size and shape of the parts are accurate.Suzhou Wellhong Electric Co., Ltd.is a professional manufacturer specialized in precision molds, injection molding, assembling and silk-printing. Chinese plastic mould plant Manufacturers and Plastic Mold Factory. Some moulds are exported to Japan, Europe and the United States. We have our own goods and factories so we can develop and produce the moulds according to the needs of our customers.
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2022.06.10

What are the processes of stamping dies for auto parts

Auto parts stamping dies generally have the following processes:1. Drawing and forming2. Trimming and punching (side trimming and side punching)3. Flanging shaping (rollover)Draw forming:: is a stamping process method that turns a metal flat blank cut into a certain shape into parts of various shapes under the action of tensile stress.Drawing die design points:1. Arrangement of pressure regulating pads Arrangement of pressure regulating padsThe adjustment pads are arranged close to the pressing surface, and each adjustment pad is arranged close to the pressing surface, one every 300~400;Adjust the corresponding position of the pad, and set the pier block on the lower die; the corresponding position of the adjustment pad, pier block, and ejector rod should have vertical ribs.2. A material locator should be set on the blank holder to ensure the stable placement of the sheets. A material locator should be set on the blank holder to ensure the stable placement of the sheets.3. The guide plate at the end of the stamping die should be provided with anti-reverse. The form is that the left side of the stamping die guide should be set to prevent the reverse. The form is that the left side of the die is larger than the right guide position. The unilateral size is 10mm. 10mm.; a peep hole should be set at the guide plate. ; A peep hole should be provided at the guide plate.4. A safety screw should be provided, and the length of the screw should ensure that the blank holder is at the top dead center.There are 20 mm 20 mm gaps. gap.5. There should be a safety protection plate between the blank holder and the lower formwork, and the height of the guard should beMake sure that the blanking ring has a covering height of 30-30 mm when the blanking ring is at the top dead center. Cover height in mm.6. Set the transport connection plate between the upper and lower molds. A transport connection plate is set between the upper and lower molds.7. Mandrel arrangement requirements: evenly distributed around the parting line, so that the blank holder ring is subject to the mandrel layout requirements: evenly distributed around the parting line, so that the blank holder ring is subjected to stable force.Suzhou Wellhong Electric Co., Ltd. is a professional manufacturer of precision molds ， Medical equipment Mould , assembling and silk-printing. 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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2022.06.02

Maintenance and maintenance of molds

1: After the mold is used for a long time, the cutting edge must be ground. After grinding, the cutting edge surface must be demagnetized, and it must not be magnetic, otherwise it is easy to block the material. Mold users should record in detail, count their use, care (lubrication, cleaning, rust prevention) and damage, so as to find out which parts and components are damaged and the degree of wear, so as to provide information for finding and solving problems. As well as the molding process parameters of the mold and the materials used in the product, in order to shorten the test time of the mold and improve the production efficiency. The various properties of the mold should be tested under the normal operation of the injection molding machine and the mold, and the dimensions of the molded plastic parts should be measured. Through this information, the existing state of the mold can be determined, and the cavity, core, cooling system and parts can be found. According to the information provided by the plastic parts, the damage status of the mold and the maintenance measures can be judged.2: Springs and other elastic parts are easily damaged during use, and usually break and deform. The method to take is to replace. During the replacement process, you must pay attention to the specifications and models of the springs. The specifications and models of the springs are confirmed by the three items of color, outer diameter and length, and can only be replaced if the three items are the same. The quality of the imported spring is better. 3: During the use of the mold, the punch is prone to breakage, bending and gnawing, and the punch sleeve is generally gnawed. Damaged punches and sleeves are generally replaced with parts of the same specification. The parameters of the punch mainly include working part size, installation part size, length size, etc.4: Fasten the parts, check whether the fastening parts are loose or damaged, and the method is to find parts of the same specification for replacement.5: Pressing parts such as pressing plate, excellent glue, etc., unloading parts such as stripping plate, pneumatic top material, etc. During maintenance, check the relationship between the parts and whether there is any damage, repair the damaged parts, check whether there is air leakage with the pneumatic jacking material, and take measures for the specific situation. If the trachea is damaged, replace it.Suzhou Wellhong Electric Co., Ltd. is a professional manufacturer of precision molds ， injection molding, assembling and silk-printing. Some Auto parts Mould 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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2022.05.24

Solutions to common problems in die stamping

What are the reasons for the blockage of chips in die stamping parts, and what countermeasures should be taken?The reasons and corresponding countermeasures for the blockage of chips in stamping parts are as follows: 1) The leakage hole is too small, the gap of the leakage hole can be increased; 2) The leakage hole is too large, the scrap material rolls, and the leakage hole is re-modified; 3) The knife edge is worn and the burr is large, and the knife edge needs to be trimmed; 4) The oil dripping is too fast and the oil is sticky. You can control the amount of oil dripping and change the oil type; 5) The surface of the straight blade of the concave die is rough, and the powder is sintered and attached to the blade, and the surface roughness can be reduced or the material can be changed by surface treatment and polishing; 6) The material is soft, modify the blanking gap;The emergency measures are: trim the end face of the punch blade with a slope or arc (pay attention to the direction), use a vacuum cleaner, and blow air at the blanking hole of the backing plate.What are the reasons for the variation of the blanking offset size during die stamping?What countermeasures should be taken? The main reasons for the variation of blanking offset size and the corresponding countermeasures are: 1) The knife edge of the convex and concave die is worn, resulting in burrs (the shape is too large, the inner hole is too small), and the knife edge needs to be repaired; 2) Improper design clearance, modify the design and control the machining accuracy; 3) If the punch and die inserts at the blanking level are offset and the gap is uneven, the position accuracy and blanking gap can be adjusted; 4) If the guide pin is worn and the pin diameter is insufficient, the guide pin can be replaced; 5) If the guide is worn, the guide post and guide bush can be replaced; 6) The feeding distance of the feeder is not properly adjusted for the release of the pressing material, and the feeder is re-adjusted; 7) Improper adjustment of the mold closing height, re-adjust the closing mold height; 8) The stripping inserts are worn out, there is no pressing (strong pressure) function or the punching is small due to the material pulling and turning over) the stripping inserts can be ground or replaced, the strong pressure function can be increased, and the pressing materials can be adjusted; 9) The strong pressure of the stripping insert is too deep, the punching hole is too large, and the die needs to be adjusted to reduce the strong pressure depth; 10) If the mechanical properties of stamping materials vary (unstable strength and elongation), it is necessary to replace the material and control the quality of the feed; 11) The punching force causes the dimensional variation of the material traction. The end face of the punch blade can be trimmed with a slope or arc to improve the force condition during punching, or a guide function can be added to the blanking part on the stripping insert.Suzhou Huihong Electric Co., Ltd. is a professional manufacturer of precision molds ，Auto parts Mould, assembling and silk-printing. 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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2022.05.20

Types of auto parts

The basic unit that constitutes each part of a vehicle for transportation, also called auto parts, or auto parts for short, is mainly composed of the following parts:Engine auto partsThrottle body, engine, engine assembly, oil pump, nozzle, tensioner, cylinder block, bearing bush, water pump, fuel injection, gasket, camshaft, valve, crankshaft, connecting rod assembly, piston, belt, muffler, chemical Oil tank, oil tank, water tank, fan, oil seal, radiator, filterDrivetrain Auto PartsTransmission, gear shift lever assembly, reducer, clutch, pneumatic, power tools, magnetic materials, electronic components, clutch disc, clutch cover, universal joint, universal ball, universal ball, ball cage, clutch disc , transfer case, power take-off, synchronizer, synchronizer ring, timing belt, differential, differential case, differential disc angle teeth, planetary gear, wheel carrier, flange, gearbox, intermediate shaft, Gear, lever fork, drive shaft assembly, drive shaft flangeBrake system auto partsBrake shoes, brake pads, brake disc, brake drum, compressor, brake assembly, brake pedal assembly, brake master cylinder, brake wheel cylinder, ABS-ECU controller, electric hydraulic pump, brake camshaft, Brake roller, brake tellurium pin, brake adjustment arm, brake chamber, vacuum booster, hand brake assembly, parking brake assembly, parking brake lever assemblySteering auto partsKingpin Steering Gear Knuckle Ball Pin ...Walking accessoriesRear axle, air suspension system, balance weight, steel plate, tire, leaf spring, half shaft, shock absorber, steel ring assembly, half shaft bolt, axle housing, frame assembly, wheel base, front axleElectrical instrument accessoriesSensors, car lamps, buzzers, spark plugs, batteries, wiring harnesses, relays, audio, alarms, regulators, distributors, starters (motors), one-way devices, car meters, switches, insurance sheets, glass regulators, Generator, ignition coil, ignitercar lampsDecorative lights, headlights, searchlights, ceiling lights, anti-fog lights, instrument lights, brake lights, tail lights, turn signals, emergency lightsCar modificationTire pump, car roof rack, car roof box, electric winch, car buffer, sunroof, sound insulation material, bumper, fixed wind wing, fender, exhaust pipe, fuel saverSecurity anti-theftSteering wheel lock, wheel lock, anti-theft device, rear view mirror, rear view system, camera, seat belt, driving recorder, central control lock, GPS, ABS, reversing radar, gear lockAutomotive interiorCar carpet (foot pad) Steering wheel cover Steering wheel power ball Curtain, sun gear ...automotive exteriorWheel cover Body color sticker License plate holder Weather...Comprehensive auto partsAdhesives, Sealants Vehicle Tools Auto Springs Plastic Parts ...Audio and video appliancesTire Pressure Monitoring System Decoder Display Vehicle Intercom ...Chemical CareCoolant Brake Fluid Antifreeze Lubricant ...Body and accessoriesWipers Auto Glass Seat Belts, Airbags Dashboards ...Maintenance equipmentSheet metal equipment Purification system Tire changer Corrector ...electrical toolsElectric punching shears Heat gun Electric jack Electric wrenchSuzhou Huihong Electric Co., Ltd.is a professional manufacturer specialized in precision molds, injection molding, assembling and silk-printing. Chinese OEM Plastic Injection Mould Manufacturers and Plastic Mold Factory. Some moulds are exported to Japan, Europe and the United States. We have our own goods and factories so we can develop and produce the moulds according to the needs of our customers.
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2022.05.09

The structure of the injection mold

The structure of the injection mold Although the structure of the mold may vary due to the variety and performance of plastics, the shape and structure of plastic products, and the type of injection machine, the basic structure is the same. The mold is mainly composed of pouring system, temperature regulation system, forming parts and structural parts. Among them, the gating system and the molding parts are the parts that are in direct contact with the plastic, and change with the plastic and the product. They are the most complex and most variable parts in the mold, and require the highest processing finish and precision. The injection mold consists of a movable mold and a fixed mold. The movable mold is installed on the moving template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a gating system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic product. In order to reduce the heavy workload of mold design and manufacturing, most of the injection molds use standard mold bases. Gating system The gating system refers to the part of Charger top cover mold Plant the runner before the plastic enters the cavity from the nozzle, including the main runner, the cold material hole, the runner and the gate. The gating system is also called the runner system. A set of feeding channels to the cavity, usually composed of a main channel, a branch channel, a gate and a cold material cavity. It is directly related to the molding quality and production efficiency of plastic products Mainstream It is a passage in the mold that connects the injection nozzle of the injection molding machine to the runner or cavity. The top of the sprue is concave for engagement with the nozzle. The inlet diameter of the main channel should be slightly larger than the diameter of the nozzle (0.8mm) to avoid overflow and prevent the two from being blocked due to inaccurate connection. The diameter of the inlet depends on the size of the product, generally 4-8mm. The diameter of the sprue should be expanded inward at an angle of 3° to 5° to facilitate the release of the runner debris. cold slug It is a cavity at the end of the main channel to capture the cold material generated between two injections at the end of the nozzle, thereby preventing the blockage of the runner or gate. If the cold material is mixed into the cavity, internal stress is easily generated in the manufactured product. The diameter of the cold material hole is about 8-10mm and the depth is 6mm. In order to facilitate demoulding, the bottom is often borne by the demoulding rod. The top of the demoulding rod should be designed as a zigzag hook or a sunken groove, so that the sprue can be pulled out smoothly when demoulding. shunt It is the channel connecting the main channel and each cavity in the multi-slot mold. In order to make the melt fill each cavity at the same speed, the arrangement of the runners on the mold should be symmetrical and equidistant. The shape and size of the runner section have an impact on the flow of the plastic melt, the demolding of the product and the ease of mold manufacturing. If the flow of the same amount of material is considered, the flow channel resistance with a circular cross-section is the smallest. However, because the specific surface of the cylindrical runner is small, it is not good for the cooling of the runner excess, and the runner must be opened on the two halves of the mold, which is labor-intensive and difficult to align. Therefore, trapezoidal or semi-circular cross-section runners are often used, and are opened on half of the mold with ejector bars. The runner surface must be polished to reduce flow resistance and provide faster filling speed. The size of the runner depends on the type of plastic, the size and thickness of the product. For most thermoplastics, the cross-sectional width of the runner is not more than 8m, the extra large can reach 10-12m, and the extra small is 2-3m. Under the premise of meeting the needs, the cross-sectional area should be reduced as much as possible to increase the shunting duct debris and prolong the cooling time. gate It is the channel that connects the main channel (or shunt channel) and the cavity. The cross-sectional area of Breath collector upper cover mold Plant the channel can be equal to the main channel (or branch channel), but it is usually reduced. Therefore, it is the part with the smallest cross-sectional area in the entire runner system. The shape and size of the gate have a great influence on the quality of the product.
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2022.05.05

Seven matters should be paid attention to in the development and injection of medical device molds

Seven matters should be paid attention to in the development and injection of medical device molds Compared with ordinary molds, the control in the manufacturing process of medical device accessories molds is different. We need to pay attention to the following matters. 1, We need to know whether the customer's product belongs to class 1, class 2 or class 3 medical devices. In the process of making medical device molds, the automation, cleanliness and production process control are different. For example, if it is class 2 medical consumables, we design the mold In the process, fully automated production will be considered to reduce the participation of personnel, and the ejection and lubrication systems will be different from ordinary molds, reducing the pollution of oil contamination to medical equipment products. 2, We will also recommend suitable medical plastics according to the specific needs of customers' medical products. Engaged in medical injection molding for more than 10 years, we have accumulated rich information on medical plastics at home and abroad, which can help customers choose medical equipment and medical equipment suitable for you. Suitable plastic for consumables. Not only from the use of medical products, but also from Auto air conditioning body mold the medical injection molding process to help customers reduce costs and improve quality. We firmly believe that easy processing and smooth process are the key factors to ensure the quality and low price of medical plastic products. 3. The barrel temperature of ordinary injection molding machines cannot meet the melting requirements of high-temperature plastics. For the injection of high-temperature medical plastic products, the company is also equipped with specific medical injection molding machines to produce high-temperature medical plastic products. 4, The company is equipped with imported medical micro-injection molding machines, which are specialized in the injection molding production of small products ranging from 0.1g to 0.5g to ensure product accuracy. 5, We will choose the appropriate mold structure and injection molding production plan according to your medical plastic production and processing quantity requirements, product structure and quality requirements, and will also help you recommend suitable and cost-effective medical plastics. 6, Before the medical device mold is opened, we will provide a manufacturable information report to ensure that you and us have a consistent understanding of 　Auto air conditioner snail shell mold quality, structure and product optimization, while eliminating the risk of mold development and medical plastic production. 7, At the beginning of your inquiry, we will ask you about the requirements of medical packaging methods, to ensure the cost and medical product packaging safety in the early stage
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2022.04.26

Mold repair knowledge

Mold repair knowledge According to incomplete statistics, the annual consumption value of molds in the machining industry is five times the total value of various machine tools. It is conceivable that the mold market in machinery, metallurgy, light industry, electronics and other industries is so huge. Another example: in the metallurgical industry, the annual consumption of hot-rolled rolls alone is more than 300,000 tons, and the value of hot-rolled rolls accounts for more than 5% of Auto air conditioner snail shell mold Plant the cost of steel production. The large consumption of molds not only directly increases production costs, but also causes greater economic losses due to frequent shutdown of a large number of production lines due to frequent mold replacement. The failure of the mold is actually scrapped due to the local material wear on the surface layer, and the processing cycle of the mold is very long and the processing cost is extremely high (especially the manufacturing and processing cost of precision and complex molds or large molds is as high as hundreds of thousands of yuan or even millions of dollars. Yuan). Therefore, it is undoubtedly a method with important economic significance to strengthen the surface of the specific parts of the mold that are really subjected to wear, so as to greatly extend and improve the service life of the mold. In addition, most molds fail and are scrapped only because a thin layer of material is worn on Auto Air Conditioner Bracket Mould Plant the surface. Therefore, it is only necessary to repair the worn local areas on the surface of the mold and key metal parts, and in the repair process, the surface of the mold is actually subjected to wear and tear. The surface of the mold is coated with a high-hardness and high-wear-resistant metal layer, which can "turn waste into treasure", not only the mold can be repaired, but the service life of the repaired mold will be greatly improved compared with the original mold, and the economic benefits will be huge (such as : It only takes a few days to repair a large shaft of a power plant motor including various preparation times, but it can create economic benefits of millions of yuan). Mold repairing machine is a high-tech equipment for repairing mold surface wear and processing defects. The principle of the mold repairing machine is to use the principle of high-frequency electric spark discharge to perform heat-free surfacing welding on the workpiece to repair the surface defects and wear of the metal mold. The main feature is that the heat-affected area is small, and the mold will not be deformed, annealed, There is no stress concentration and no cracks, which ensures the integrity of the mold; it can also use its strengthening function to strengthen the surface of the mold workpiece to achieve wear resistance, heat resistance, and corrosion resistance of the mold. The mold repairing machine strengthens the mold with long service life and good economic benefits. It can be used to strengthen and repair the surface of various iron-based alloys (carbon steel, alloy steel, cast iron), nickel-based alloys and other metal materials, molds and workpieces, and greatly improve the service life. Scope of application: machinery, automobile, light industry, household appliances, petroleum, chemical industry, electric power and other industrial equipment manufacturing departments and use departments, key wear parts of aero-engine, hot extrusion dies, warm extrusion film tools, hot forging dies, rolling steel rolling Parts and molds for guides, rollers, camshafts of automobile engines, etc.
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2022.04.18

How much do you know about the manufacturing process performance of the mold?

How much do you know about the manufacturing process performance of the mold? The manufacture of molds generally has to go through several processes such as forging, cutting, and heat treatment. In order to ensure the manufacturing quality of the mold and reduce the production cost, the material should have good forgeability, machinability, hardenability, hardenability and grindability; it should also have small oxidation, decarburization sensitivity and quenching. Deformation and cracking tendency. 1. Forgeability It has low hot forging deformation resistance, good plasticity, wide forging temperature range, low tendency for forging cracking and cold cracking and precipitation of network carbides. 2. Annealing manufacturability The spheroidizing annealing temperature range is wide, the annealing hardness is low and the fluctuation range is small, and the spheroidizing rate is high. 3. Machinability The cutting amount is large, the tool loss is low, and the machined surface roughness is low. 4. Oxidation, decarburization sensitivity When heated at high temperature, it has good anti-oxidation energy, slow decarburization Auto parts Mould speed, insensitivity to heating medium, and small tendency to produce pitting. 5. Hardenability It has a uniform and high surface hardness after quenching. 6. Hardenability After quenching, a deep hardened layer can be obtained, which can be hardened by using a mild quenching medium. 7. Quenching deformation cracking tendency The volume change of conventional quenching is small, the shape is warped, the distortion is slight, and the abnormal deformation tendency is low. Conventional quenching has low cracking sensitivity and is not sensitive to quenching temperature and workpiece shape. 8. Grindability The relative loss of Household appliances Mould the grinding wheel is small, the limit grinding amount without burns is large, it is not sensitive to the quality of the grinding wheel and the cooling conditions, and it is not easy to cause abrasion and grinding cracks.
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2022.04.11

Mold material selection requirements

Mold material selection requirements Mold material selection is a very important link in 　Auto parts Mould the entire mold making process. The selection of mold materials needs to meet three principles. The mold meets the work requirements such as wear resistance and toughness, the mold meets the process requirements, and the mold should meet economic applicability. Condition requirements 1. Wear resistance When the blank is plastically deformed in the mold cavity, it both flows and slides along the surface of the cavity, causing severe friction between the surface of the cavity and the blank, resulting in the failure of the mold due to wear. Therefore, the wear resistance of the material is one of the most basic and important properties of the mold. Hardness is the main factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. In addition, wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material. 2. toughness Most of the working conditions of the mold are very bad, and some often bear a large impact load, which leads to brittle fracture. In order to prevent sudden brittle fracture of mold parts during operation, the mold must have high strength and toughness. The toughness of the mold mainly depends on the carbon content, grain size and organizational state of the material. 3. Fatigue fracture performance During the working process of the mold, fatigue fracture is often caused under the long-term action of cyclic stress. Its forms include small-energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending fatigue fracture. The fatigue fracture performance of the mold mainly depends on its strength, toughness, hardness, and the content of inclusions in the material. 4. High temperature performance When the working temperature of the mold is higher, the hardness and strength will decrease, resulting in Household appliances Mould early wear of the mold or plastic deformation and failure. Therefore, the mold material should have high anti-tempering stability to ensure that the mold has high hardness and strength at working temperature. 5. Thermal fatigue resistance Some molds are in a state of repeated heating and cooling during the working process, which causes the surface of the cavity to be subjected to tension, pressure and stress, causing surface cracking and peeling, increasing friction, hindering plastic deformation, and reducing dimensional accuracy, resulting in Mold failure. Hot and cold fatigue is one of the main forms of failure of hot work dies, and these dies should have high resistance to cold and heat fatigue. 6. Corrosion resistance When some molds such as plastic molds are working, due to the presence of chlorine, fluorine and other elements in the plastic, strong corrosive gases such as HCI and HF are decomposed after heating, which erodes the surface of the mold cavity, increases its surface roughness, and aggravates wear failure.
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