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Is a hollow space in the part because some air can't be sucked out of the mold during vacuum casting process.
Is an opened-box to hanging the master model in it and hold the liquid silicone to form the silicone mold. Usually built with aluminium plates.
A device used in casting and moulding processes to produce external shape and surfaces of parts.
A device used in casting and moulding processes to produce internal cavities and reentrant angles of parts.
In engineering, draft is the amount of taper for molded or cast parts perpendicular to the parting line. It makes the act of de-molding easier.
A gate is a designed small opening to allow the liquid resin into the silicone mold cavity, a successful gate design is determined by part structure, size and location.
Is a assistant tool in the silicone mold to form some special features such as deep hole, narrow slot, undercut of parts
Is an object that made by 3D printing or CNC machining according to 3D drawing of final workpiece. It is used as a part to form the cavity and core into the silicome mold.
Is the process of adding an additional layer of material over an already existing piece or part. Usually a rubber part is molded over another rigid component.
For vacuum casting, oven is a thermally insulated chamber used forsolidifying silicone mold and workpieces after casting, and pre-heating silicone mold and liquid resin.
It is the dividing line that splits the core and cavity halves of a molded part. It is usually created by manual with knife for silicone mold.
Known as PU or PUR, is a polymer composed of organic units joined by carbamate (urethane) links. It is a general designation of all the vacuum casting material.
Is a chemical used to prevent casting resin parts from bonding to mold surfaces. So as to make the part easier to be taken out of silicone mold.
ilicone, by contrast, is a synthetic polymer made up of silicon, oxygen and other elements, most typically carbon and hydrogen. Silicone is generally a liquid or a flexible, rubber-like plastic, and has a number of useful properties, such as low toxicity and high heat resistance. It also provides good electrical insulation.
A process that makes liquid silione or resin become solid or hard. For vacuum casting, it is done in oven.
Shore hardness is a measure of the resistance of a material to the penetration of a needle under a defined spring force. It is determined as a number from 0 to 100 on the scales A or D. The higher the number, the higher the hardness. The letter A is used for flexible types and the letter D for rigid types.
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