June 29, 2020
Plastic Mold Case
June 28, 2020
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 [...]June 23, 2020
Control measures to prevent painting and poor electroplating in injection molding production
① Try not to use release agent. When it must be used, only dry release agent or neutral release agent can be used to lightly spray the moving mold (commonly known as "back mold"), but the injection molded parts that need to be plated must not be used. When spraying, pay attention to that the [...]June 19, 2020
Problems caused by the use of long nozzles and their remedies
If the nozzle used is long, the melt is easy to cool during injection molding, and a lower temperature condensate will be generated at the front end of the nozzle. When the cavity is injected into the cavity, the cavity will be underfilled, and the other cavity will overflow due to overfilling. Especially when injecting [...]June 16, 2020
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 [...]June 14, 2020
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 [...]June 13, 2020
The benefits of larger gates and runners
In the injection molding production process, when adjusting the machine becomes difficult, trying to make some changes in the mold is a wise choice to solve the injection molding problem. Changing the position of the gate, changing the size of the runner, and adjusting the filling speed of each cavity are some of the commonly [...]June 12, 2020
Application and skills for adjusting the filling speed of each cavity
In a multi-cavity mold, the filling speed of various cavities is often uneven (unbalanced). Some cavities are filled quickly, and some are filled slowly. At this time, injection parts with fast filling are prone to problems such as overflow, white top and trapped gas, while slow filling is prone to shrinkage or insufficient filling. The [...]June 11, 2020
Solutions to the phenomenon of dragging of electroplated molds during injection of products
In order to prevent the core and cavity of the mold from rusting, the cavity parts of some molds need to be electroplated and make their surfaces look very bright, but the product is often smeared when the transparent plastic is injected (scraped by the core when demolding) Out of obvious patterns). In fact, the [...]June 10, 2020
