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short shot short shot in injection molding refers to the phenomenon that the injection material does not completely fill the cavity of the mold, resulting in incomplete parts. It usually occurs in thin-walled areas or areas away from the gate. For some internal face, the short shot does not matter without affecting the beauty; no …

What Is Plastic Mold?   What is plastic mold? The tooling used for plastic injection molding is called plastic mold or plastic injection mold. Most plastic products are molded by plastic molds. Plastic molds are divided into two types: thermosetting and thermoplastic mold ,according to the molding plastic characteristics. Based on the molding process, the …

The gate is a narrow intersection between the main runner and the mould cavity, and the intersection is also the shortest part on the whole mold. Its function is to make the molten plastic enter into the mould cavity quickly, which is beneficial to the rapid filling of the cavity. After filling, the gate is condensed …

In order to understand the various designs of undercut mould, we must first understand the definition of what a moulded undercut really is. In its most simplistic form,an undercut can be described as any feature on the moulding which resists the line of the draw or inhibits the ejection of the moulding from the mould. …

The choice of mould steel is of great importance if the mould is to function effectively. When plastic is molded, due to molecular stretching and shearing, residual stress is left in the product, which causes the product to warp and even crack. Residual stress is also generated during the machining of the mold steel. This …

A runnerless or hot-runner mould system could be considered as an extension of the moulding machine injection unit. In this case,the polymer is kept molten right up to the cavity gate by means of additional heating elements controlled by thermocouples. The working temperature of the hot-runner system is not dissimilar to that of the molten …

How to avoid contamination and waste in injectionmolding shop? Keeping material clean The importance of cleanliness in the plastic mould injection shop is nowhere more apparent than in the making of mouldings free from contamination. Safeguarding the material in the sack is an obvious matter, but is often ignored. Partially used sacks or containers should …

Most injection moulding organizations cannot go to the expense of having a complete reprocessing plant consisting of granulator, mixer/extruder, and die- face or lace cutter. The general arrangement is to have a room in a fairly remote corner of the building where material can be granulated using an ordinary masson-type cutter. Although this produces re-work …

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