Plastic mold in the design process should pay attention to matters

Plastic mold design and manufacture are closely related to plastic processing.The quality of plastic mold processing depends to a large extent on the design effect of the mold and the quality of the mold manufacturing, and the foundation of plastic mold design is the correct design of plastic products.

The structural elements to be considered in the design of plastic molds are as follows:

1, parting surface, that is, when the die is closed, the concave die and punch contact surface with each other.The selection of its position and form is affected by the shape and appearance of products, wall thickness, molding method, post-processing technology, mold type and structure, demoulding method and molding machine structure and other factors.

2, structural parts, that is, complex mold slider, inclined top, straight top block, etc.First of all, the design of structural parts is very critical, because it relates to the life of the mold, processing cycle, cost, product quality and so on.Therefore, the design of complex die core structure requires a higher comprehensive ability of designers, as far as possible to pursue a simpler, more durable, more economic design scheme.

3, precision of the mold, that is, avoid card, precise positioning, guide post, positioning pin, etc.Positioning system is related to the product appearance quality, mold quality and life, according to the mold structure is different, choose different positioning methods, positioning precision control mainly depends on processing, internal mold positioning is mainly designers to fully consider, in order to design a more reasonable and easy to adjust the positioning way.

4, gating system, that is, from the injection molding machine nozzle to the cavity between the feed channel, including the main channel, shunt channel, gate and cold hole.In particular, the location of the gate should be selected to facilitate the filling of the cavity of the molten plastic in a good flow state, and the solid runner attached to the product and the cold material of the gate are easy to be ejected from the mold and removed when the mold is opened.

5, plastic shrinkage rate and the factors affecting the dimensional accuracy of products, such as mold manufacturing and assembly error, mold wear and so on.In addition, the design of compression mold and injection mold, should also consider the molding machine process and structural parameters of the match.Computer aided design technology has been widely used in plastic mold design.

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