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COMPRESSION MOLDED COMPONENTS

      Compression molded plastics offer greater flexibility when prototyping of new designs does not warrant the extra expense of a new mold. Our engineers can show you how plastics can be more cost effective and outperform many of the metal parts you are using today.

      Custom and proprietary modular injection and compression molded plastics for the automotive and electrical appliances industries. The propeller should be made of injection-molded engineer-grade thermal plastic that is durable, resilient to impact and resists bending, as opposed to soft compression-molded plastics which can fold back at higher flow rates, affecting the accuracy of the meter.

      The three compression molding factors -- pressure, temperature and time the mold is closed -- vary with the design of the finished article and the material being molded. Transfer molding is most generally used for thermosetting plastics. This method is like compression molding in that the plastic is cured into an infusible state in a mold under heat and pressure.

      Materials for compression molding include phenolics, melamine, urea-formaldehyde, epoxies, urethanes, and elastomers. Typical TS plastic moldings include electric plugs, sockets, and housings; pot handles, and dinnerware plates. Advantages noted for compression molding in these applications include: molds that are simpler, less expensive, and require low maintenance; less scrap; and low residual stresses in the molded parts (thus favoring this process for flat thin parts such as phonograph records). A typical disadvantage is longer cycle times and therefore lower production rates than injection molding.
   
   


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