Compression molding

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Compression molding is a manufacturing process for plastics that is usually used for larger, less detailed components. The main area of ​​application for this process is the automotive industry, where it is used for the production of larger components with a two-dimensional or simple three-dimensional structure, such as engine hoods, bumpers, spoilers, interior trim or tailgates. Both thermosetting and thermoplastic plastics can be processed.

At the beginning of the process, the molding compound is introduced into the cavity of the die , which is then heated. The cavity is then closed using a pressure piston. The pressure gives the molding compound the shape specified by the tool. In the case of thermosetting plastics, the temperature is used to influence the curing process; in the case of thermoplastics, it is used to melt the plastic. After cooling, the finished part can be removed from the mold and, if necessary, reworked or further processed.

The compression molding process is particularly suitable for medium-sized quantities. The tool costs are generally lower than those for injection molding, for example . In contrast to this, compression molding is also well suited for the production of fiber composite materials such as natural fiber-reinforced plastics .

literature

  • M. Neitzel, P. Mitschang: Handbook of Composite Materials , Carl Hanser Verlag, Munich Vienna, 2004
  • W. Michaeli: Introduction to plastics processing Carl Hanser Verlag, Munich Vienna, 2006