posted on September 24, 2012 07:58
In general, it is all about Texas Compression Molding in which the molding material is preheated and placed in an open, heated mold cavity then it is closed with a top force or plug member; in order to force the material into contact with all mold areas, pressure is applied, heat and pressure is maintained until the molding material is cured.
Compression molding process:
To get started with its process, it starts with a selected sum of plastic or gelatin placed over or slot in into a mold. Later, the material is heated to a malleable condition by the mold. Abruptly from then on the hydraulic press condenses the malleable plastic against the mold, ensuing in a completely molded piece, keeping hold of the shape of the interior surface of the mold. Followed by that, the hydraulic press releases and an ejector pin in the bottom of the mold rapidly casts out the finish piece from the mold. As soon as it gets ejected the process gets over. On the other hand, based on the type of plunger used in the press there will or won't be excess material on the mold.
Advantages of compression molding:
As far as the compression molding process is concerned there is one such distinct advantage and is its ability to mold small to large complex parts with features such as openings that would otherwise have to be post-machined with other practices. It generates fewer knit lines and less fiber-length filth than any other molding process.
This method engrosses taking rubber compound or mixed raw material and making "pre-forms" that are in the outline of the final product. Then the shapes are loaded, typically by hand, into an open mold to come out with the process.
On the whole, to put it in simple words it involves squishing a chunk of uncured rubber into a pocket in the mold.