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Polyurethane elastomer testing machine Sep 04, 2017 The process equipment or consumable parts of mold cavity are formed by simulating casting shape. In order to ensure the formation of the required cavity, the pattern should have sufficient strength ﹑ stiffness. The riser is attached to the top or side of the casting equipment to avoid defects in the casting. In a mold, the cavity of the riser is a container for storing liquid metals. The core box will make the core sand into the mold core of the process casting equipment. Can be made from wood ﹑ plastic ﹑ metal or other materials.