The selection of this molding process is generally influenced by the selection of materials to obtain the desired elastic properties of the workpiece to be made. Sometimes it is also influenced by the form of product design, for example, a wide thin, long insert, and demanding accuracy of size (tolerance) to be met. Of the two tiger materials as above is known there are several basic methods of molding, and one of them is the compression molding. Aside from that, you might also need to check out the recommended triple-c.
Often the method to be used should be determined before the design is exposed to the image. So the choice of material from engineering workmanship should be based on several factors that influence the same things as well as the demands.
In this process, the plastic material is placed in a heated mold. After the plastic compound (plastic compound) becomes soft and plastic, the top of the mold will move down and press the material into the desired shape.
The molding temperature for this thermosetting material is between 149O – 182Oc and the molding pressure is between 155 – 600 bar.
There are 4 kinds of a mold for compression molding process that is:
Fash type mold:
Simple shape cheap. If the mold is closed, the excess material will overflow and form a thin layer on the parting line/plain and the thin arena will soon harden/freeze to avoid overflowing more material. So usually the mold will fill the material completely until the overflow occurs as much as allowable.
Consists of a deep cavity with a plunger that compresses the compound material at the bottom of the mold. Here it is necessary to provide the material according to what is required, for example by weighing it, in order to produce a good product and uniform density (density)
Landed positive mold:
Similar to the above type, only the plane boundary/parting plain is limited. Bagran “land B” is working to withstand pressure (not part of the product). Because the thickness of the material is well controlled, the density of the workpiece depends on the given dose of charge.
Semi-positive mold: It is a combination of flash type and landed a positive mold.