Plastic Injection Moulding Parts

Custom Nylon/Pom/Abs Plastic Injection Moulding Parts Molding Product
Plastic injection molding parts mold aspects:
Reasonable cooling water system. The lower the mold temperature, the less likely it is to fully fuse the melt. When designing the mold, if the cooling water channel is too close to the fusion point of the melts, the melts at the joints will not be fully fused due to the temperature drop and viscosity increase, and obvious weld marks will be produced. Improper cooling design will also cause excessive difference in mold temperature distribution, resulting in different filling speeds at different parts of the cavity when the melt is filling the mold, resulting in weld lines;

 Appropriately reduce the surface roughness of the mold cavity and core. The surface roughness of the cavity and core also affects the flow rate of the melt filling mold. If the surface roughness value is too large, the flow rate will slow down, the condensation layer on the mold wall will thicken, the material flow section will decrease, the flow resistance will further increase, the temperature drop will expand, and the welding strength of the branch flow will be damaged. In addition, when the mold is made, if the surface roughness of the cavity is inconsistent, the weld line will be generated due to the different filling speed of the melt;
 

Arrange the heating system at the weld line, and arrange the heating system at the weld line to increase the temperature of the melt flow front, improve the fusion strength of the melt, and improve the performance of the weld line;
 

Use variable mold temperature technology to eliminate weld marks. High mold temperature is used in the filling stage of injection molding to ensure product quality. Low mold temperature is used in the post-filling stage to shorten cycle time. In this way, high and low mold temperatures alternate to take into account product quality and The technology of production efficiency is called variable mold temperature technology.
The temperature control methods inside the mold include electric heating, high-temperature medium (such as oil and water) heating, steam heating, and pulse cooling. The temperature control methods outside the mold include flame heating, infrared heating, and electromagnetic heating, such as surface high-gloss injection molding developed in recent years. Molding technology is the use of high-temperature medium to achieve mold temperature control. The realization process is: before the injection molding machine closes the mold, the high-pressure hot water is passed into the core of the fixed mold, and after the mold is closed, the surface temperature of the fixed mold cavity is raised to a higher level. Set the value, usually to reach the heat distortion temperature of the plastic.
Then, the injection molding machine starts to inject molten material into the mold cavity. After the injection molding machine completes the pressure maintenance and turns to cooling, the fixed mold core is fed with high-pressure cold water. After the mold temperature drops rapidly to a set value, the mold is opened and the entire injection is completed. process;
 

The multi-gate sequence control of the hot runner eliminates the weld marks. If the injection molded parts use a hot runner system, the multi-gate sequence control system can be used to eliminate the weld marks.

FAQ:

how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

what can you buy from us?
Fastener,CNC Machined Parts,Metal Fabrication

why should you buy from us not from other suppliers?
Fasteners, Hardware Components & Auto Fittings

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