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Basic knowledge of mold design for rubber injection molding machine

2021-01-15(99)Views

Rubber molds are divided into four common molds according to the mold structure and product production process: compression molding molds, die-casting molding molds, injection molding molds, and extrusion molding molds, as well as some special rubber molds for producing special rubber products, such as inflatable molds, Dipping molds, etc.

一、Classification of rubber molds

Rubber molds are divided into four common molds according to the mold structure and product production process: compression molding molds, die-casting molding molds, injection molding molds, and extrusion molding molds, as well as some special rubber molds for producing special rubber products, such as inflatable molds, Dipping molds, etc.


1.press forming mold

is also called ordinary stamper. It puts the mixed, processed into a certain shape and weighed semi-finished rubber material directly into the mold, and then sends it to the plate vulcanizer for pressure and heating. The rubber material is vulcanized and formed under pressure and heating.


Features: The mold has simple structure, strong versatility, wide range of use and convenient operation, so it occupies a large proportion of rubber molded products.


2.die-casting mold

is also called transfer mold or extrusion mold. It is to put the mixed, simple shape, a certain limited amount of semi-finished rubber or rubber block into the die-casting mold cavity, squeeze the rubber through the pressure of the die-casting plug, and make the rubber enter the mold cavity through the pouring system Medium vulcanization stereotypes.


Features: It is more complex than ordinary compression molds, and is suitable for making thin-walled, slender and flexible products that cannot be compressed or barely compressed by ordinary compression molding, and rubber products with complex shapes and difficult to feed. The products produced by this mold have good compactness and superior quality.


3.injection molding mold

It is to inject the pre-heated plastic material into the mold through the pouring system of the injection mold to set and cure.

Features: complex structure, suitable for large-scale, thick-walled, thin-walled, and complex-shaped products. The production efficiency is high, the quality is stable, and automatic production can be realized.


4. Extrusion molding die

The semi-finished rubber profiles of various cross-sectional shapes are made by the molding die of the machine head to achieve the purpose of preliminary modeling, and then are cooled and shaped and transported to the vulcanizing tank for vulcanization or used as the preformed semi-finished rubber material required by the compression molding method.

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