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Melamine Paper Cutting Machine
3 Types of Moulds for Compression Molding Jan 06, 2021

Melamine tableware is produced by compression molding and it is a thermosetting plastic product.

The equipment for compression molding s generally composed of the compression machine and the compression mold.

compression machine and mould

For compression molding, there are three types of moulds as follow. 

1. Flash Moulds

The flash mold has a simple structure and low manufacturing cost. The excess material can flash out during the pressing process, so the closing speed cannot be too slow. It is suitable for flat disc or butterfly shape products.

2. Positive Moulds

The structure of the positive mold is relatively complicated and the manufacturing cost is high. The two parts of the female mold and the male mold are required to be closed accurately. The operation technology requirements are high during pressing. The weight method must be used to feed, and it is not easy to vent, because the material cannot be removed from the cavity. All molding pressure acts on the material to obtain high-density products.

3. Semi-positive Moulds

The structure of the semi-positive mold is between the above two. Its manufacturing cost and operating requirements are lower than those of the positive mold. The material can flash out during pressing but is subject to certain restrictions. It can press some more complicated shapes products.

melamine compression moulds

Shunhao brand urea and melamine moulds are the first type mold. The advanced CNC machines in Shunhao Factory and experienced mold designers and technicians ensure that the finished products have the quality, longer service life and the least flash parts. We will help more and more tableware factories to save cost and develop better in the future.


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