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What is an Injection Molding Prototype
Nov 30, 2017


     What is an Injection Molding Prototype

In the process of manufacturing, the term injection molding prototype can refer to two definitely different matter. An injection molding prototype can be a customized injection molding part. The term can also refer to the original part used to develop an injection mold from which duplicate parts may be cast. In any case, a prototype is usually either a singular part or a part from an early series of developed product.


The first usage of the term refers to products of the injection molding process. These parts are usually one of a kind and developed for a specific purpose. The injection molding prototypes produced in this manner is not required mass production, and the production numbers are limited.

While the first usage of injection molding prototype is very simple, the second need to a bit of explanation. The prototype used to create injection molds has been employed since the early history of injection molding. Similar to the lost wax method of casting, injection molding prototype casting utilizes the original prototype to shape and form the injection mold. Machines procure molten plastics into a mold made in the exact negative of the original injection molding prototype. By creating molds in this way, an exact duplicate of the original part can be made.

This process is often accomplished by the same techniques used to make lost wax casting molds. The injection mold maker uses vulcanized rubber to make an exact negative mold of the injection molding prototype. The mold maker uses this negative to create injection molding dies for long production runs. The worker may also use the original mold for projects when the mass production are not be produced.

The injection molding prototype may be made from wood, metal, ceramic, or other materials. The only standard for prototype product choice is that the material must be able to withstand the heat of the mold making process. This wide variance in materials makes it possible to create prototypes in a reasonable lower-cost way.

In some cases, the injection molding prototype of an exact part might be very detailed for proper casting of injection molded parts. In the situation, the details such as threading or cut-aways may be omitted from the injection mold and later tooled into the individual working piece. While the tooled components will not have the same strength as purely injection molded pieces, this step can clear up trouble place in the casting process.


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