Mold parts Guide pins

To achieve accurate dimensions in the finished part, the mold cores must be aligned accurately with the cavities. Mold halves have large guide pins in the corners to assure alignment. 

Cavity-retainer plate n. A plate in a mold that holds the cavities and forces. Such plates are at the mold parting line and usually contain the guide pins and bushings. 

Step 5 The flask is separated and the pattern is removed. If guide pins were not included as part of the mold they must be located and installed now. Procedure would be the same as in past iholds we have made. The procedure for locating and drilling the sprue hole would also be the same as in past molds we have made. 

Fit the bottom mold half for guide pins Just as you did in the other molds we have made. Clamp the mold halves together in the vise. Drill the 1/8 sprue opening centered on the parting line and through to the mold. cavity. This is Just as we have done... 

Ejection is usually carried out by guided metal pins - ejectors - that are part of the mold. These ejectors push the molding off the cavity surfaces. Here it is important to ensure, that the article is not damaged by the ejector pins. 

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