In the life of Wuhan injection mold company, how to distinguish the quality of plastic mold is really a difficulty, especially in the online remote transaction. The main obstacle is that the mold is not like other products. Other products have samples. Customers can identify whether this product is the product they want through the samples. The mold is customized. After the customer determines to open the mold, he / she provides samples or drawings to the supplier for processing and production. The quality of the mold depends not only on the mold itself, but also on whether the products processed by the mold are qualified. Mold itself, the first thing to see is the mold material. A lot of customers know that before the mold is placed, they should confirm the mold material with the manufacturer. The choice of mold material is actually a choice of steel.
Die is an important basic forming equipment in industrial production, which is often called "the mother of industry". With the rapid development of China's auto industry, the auto mold industry has become the most important part of China's mold industry, and the scale of the industry is expanding. Under the promotion of the national automobile lightweight policy, the development of automobile lightweight is an inevitable trend, which will effectively promote the development of injection mold.
More than 95% of the auto parts need to be processed and manufactured in batches by means of molds. In the development of a new car, more than 20000 auto parts are needed, including sheet metal parts, die-casting parts, stamping parts, plastic parts, electronic components, etc. In the R & D and manufacturing process of these parts, a large number of molds and jigs are needed, among which the demand for injection mold mold is the largest.
Each kind of plastic has different flow temperature. For the same kind of plastic, the flow temperature and decomposition temperature are different due to different sources or brands. This is due to different average molecular weight and molecular weight distribution. The plasticization process of plastic in different types of injection machines is also different, so the selection of barrel temperature is also different.
The temperature of the nozzle is usually slightly lower than the maximum temperature of the barrel, which is to prevent the possible "salivation" of the molten material in the through nozzle. The temperature of the nozzle should not be too low, otherwise it will cause the early setting of the melt and block the nozzle, or the injection mold company will affect the performance of the products due to the early setting of the injection mold cavity. Mold temperature has a great influence on the internal performance and apparent quality of products.
The injection pressure is provided by the hydraulic system of the injection system. The pressure of the hydraulic cylinder is transmitted to the plastic melt through the screw of the injection molding machine. Driven by the pressure, the plastic melt enters the vertical channel (which is also the main channel for some molds), the main channel and the shunt channel of the mold through the nozzle of the injection molding machine, and enters the mold cavity through the gate. This process is called the injection molding process, or the filling process.
The existence of pressure is to overcome the resistance in the melt flow process, or conversely, the resistance in the flow process needs to be offset by the pressure of the injection molding machine to ensure the smooth filling process. In the process of injection molding, the pressure at the nozzle of injection molding machine is the highest to overcome the flow resistance in the whole process of melt. After that, the pressure decreases gradually along the flow length to the front of the melt. If the cavity is well vented, the final pressure at the front of the melt of the injection mold company is atmospheric pressure.
One of the advantages of thermal conductive silica gel sheet is that the material is usually soft and soft, the other is that its performance is also good, the thermal conductivity is the best, and its thickness range is also adjustable, which is very suitable for filling cavities, very natural viscosity, maneuverable performance and maintainability.
The main advantage of choosing thermal conductive silica gel sheet is that it can reduce the surface and generate contact thermal resistance with the contact surface of radiator. Thermal conductive silica gel can be used as a good filler. For the disadvantage of thermal gasket, compared with the thermal silicone grease, the disadvantage of Wuhan injection mold model is that its thermal conductivity is higher than that of thermal silicone grease, and its thermal resistance is higher than that of thermal gasket.
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