Transcription of COIL BOBBIN MATERIALS - Cosmo Corp
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COIL BOBBIN MATERIALS - Cosmo Corp
COIL BOBBINMATERIALST here are many plastic compounds available on the market today. Due to the stringent requirements of coils used in industry, only a small number of these MATERIALS are appropriate for the manufacture of coil bobbins. A variety of different molding processes are used to mold bobbins in these PROCESSESTo help understand the material section, we will fi rst explain the basic molding processes that are used to mold the various types of plastic resins. This may help you to relate the MATERIALS physical and thermal properties with the cost of the MATERIALS molding process as another material selection MoldingThe method that is most widely used today for making bobbins is the injection molding process. The process can be adapted to mold both thermoplastic and thermosetting MATERIALS . When using thermosetting MATERIALS , relatively cool material is injected into a hot mold and after a short period of time the mold is opened and the parts are ejected.
the core of the bobbin and affect the clearances required for the core member going through the coil. Coeffi cient of Linear Expansion is much greater in plastic materials than metals - up to 5 to 6 times greater, depending on the plastic. Therefore, as the coil is heated, the plastic will expand, causing a …
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