Plastic Parts

Skills for adjusting streaks and welding marks on thick PVC injection moulded parts (2)

Sometimes, the cavity space at the gate position is too large, which makes it difficult to eliminate weld marks and streaks. This requires an extremely low first-level injection speed for injection to reduce or eliminate the weld marks and streaks. But if the injection speed is too slow, the heat dissipation time of the melt [...]
Injection Molding, Plastic Mold Case, Plastic Molding Design, Plastic Parts

Effective measures to solve the problem of streaks in thick injection moulding parts from the perspective of the mould

I have introduced a lot of thick PVC streaks adjusting techniques and improvement measures. However, if you can start with the mould and completely eliminate the root cause of this problem in the mould design-the cavity space at the gate position is too large, the streaks problem will not occur at all, and the same [...]
Injection Molding, Plastic Mold Case, Plastic Molding Design, Plastic Parts

Analysis of the reason why the streaks and welding mark of thick PVC injection molded parts are difficult

In injection molding production, it is often encountered with thick PVC injection molded parts with a wall thickness of more than 50mm. Because the internal space of the cavity is too large, when the melt is injected from the gate into the wide cavity, the squeezed melt will be injected into the cavity from the [...]
Injection Molding, Plastic Mold Case, Plastic Molding Design, Plastic Parts

Effective measures to solve the oil drop of low hardness soft plastic parts after oil injection

For low hardness PVC and rubber injection parts with a hardness value less than 80 degrees (Shore hardness, GB / T2411—2008), the problem of oil loss has always been a quality problem that is difficult to control and guarantee during production in the oil injection department. The lower the hardness, the more It is difficult [...]
Injection Molding, Plastic Mold Case, Plastic Molding Design, Plastic Parts

The harm of small injection molding machine with large mold for injection production

Small injection molding machines are used for injection production with large molds. Even if the molds can be installed, the ejection force of the injection molding machine is insufficient, and the injection parts are difficult to eject. Therefore, the operator often has to adjust the ejection speed of the ejector rod. To form an impact [...]
Injection Molding, Plastic Mold Case, Plastic Molding Design, Plastic Parts

The reason why the POM and PVC materials produced by the old injection molding machine often scorch

Generally speaking, the barrel, screw and check ring of the old injection molding machine mostly wear to different degrees, and the cooperation gap between them will be relatively large, especially the injection molding machine that often produces POM and PVC Big. Due to the increased gap, during injection, part of the melt will flow back [...]
Injection Molding, Plastic Mold Case, Plastic Molding Design, Plastic Parts

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