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Alternately, resin casting may be accomplished with a resin plus a nearly equal amount of a "hardener" liquid (as in many epoxy resin or polyester resin systems), which functionally contains a second polymer, for use in forming a final product plastic which is a copolymer. Copolymers contain two different alternating chemical entities in the ...
Resin casting garage kit production is the most labor-intensive. The upside is that creating the initial mold is much less costly than in the injection-molding process. Vinyl garage kits are produced by using liquid vinyl Plastisol in a spin casting process known as slush molding. It is more complex than resin casting, but less expensive and ...
The process of making resin toys is more labor-intensive and time-consuming than industrialized vinyl toy production, which in most of cases are made identical and in large quantities. But resin casting allows artists to produce toys in small numbers. Most vinyl factories will only produce toys in large series.
Shell molding, also known as shell-mold casting, [1] is an expendable mold casting process that uses resin covered sand to form the mold. As compared to sand casting , this process has better dimensional accuracy, a higher productivity rate, and lower labour requirements.
Transfer molding (BrE: transfer moulding) is a manufacturing process in which casting material is forced into a mold.Transfer molding is different from compression molding in that the mold is enclosed [1] rather than open to the fill plunger resulting in higher dimensional tolerances and less environmental impact. [2]
Bakelite resin could be provided either as powder or as preformed partially cured slugs, increasing the speed of the casting. Thermosetting resins such as Bakelite required heat and pressure during the molding cycle but could be removed from the molding process without being cooled, again making the molding process faster.