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 bright mold is not necessarily smooth, the friction between it and the injection molded parts is actually very large. In general, it is not allowed to spray release agent when producing transparent plastic parts, so hot injection parts are like sticking to the mold, and the longer the mold production time, the more serious this feeling. This is because when the mold is manufactured, the oil stains immersed in the metal surface of the mold will be less and less, and the plastic stains left by the injection molded parts will also be more and more, so the friction force becomes larger and larger, and the problem of drag produced. If the mold release slope is insufficient, it is more likely to cause dragging of injection molded parts.

In order to reduce the friction between the product and the mold, in fact, it is only necessary to use the diamond paste for polishing the mold to polish the position of the drag in the mold. This will not only remove the glue stains on the mold, but also allow a small amount of oil stains to penetrate the metal interior and the mold surface It becomes smooth again, and the problem of dragging can usually be solved.

Many junior and intermediate technicians generally do not dare to do this, fearing that the mold will be flowered. But only need to pay attention to rubbing the mold with cotton dipped in diamond paste, do not use cloth to wipe, you can avoid the mold flower.

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Injection Molding, Plastic Mold Case, Plastic Molding Design, Plastic Parts
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