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A custom resin cast Pinky:St part and two-part silicone mold. Resin casting is used to produce collectible and customized toys and figures like designer toys, garage kits and ball-jointed dolls, as well as scale models, either individual parts or entire models of objects like trains, aircraft or ships.
Casting is a manufacturing process in which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify. The solidified part is also known as a casting, which is ejected or broken out of the mold to complete the process.
Polymer solution casting technology can be deployed utilizing a host of different polymer materials depending on the application and design inputs, including those used in Class I, II and III medical devices, [2] and for the preparation of polymer electrolytes.
Centrifugal casting (industrial) Continuous casting; Die casting; Evaporative-pattern casting. Full-mold casting; Lost-foam casting; Investment casting (Lost-wax casting) Countergravity casting [1] Lost-foam casting; Low pressure die casting; Permanent mold casting; Plastic mold casting; Resin casting; Sand casting; Shell molding; Slush casting ...
The cast surface finish is 0.3–4.0 micrometers (50–150 μin) because a finer sand is used. The resin also assists in forming a very smooth surface. The process, in general, produces very consistent castings from one casting to the next. [5] The sand-resin mix can be recycled by burning off the resin at high temperatures. [6]
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 ...
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Phenol-formaldehyde resins, as a group, are formed by a step-growth polymerization reaction that can be either acid- or base-catalysed.Since formaldehyde exists predominantly in solution as a dynamic equilibrium of methylene glycol oligomers, the concentration of the reactive form of formaldehyde depends on temperature and pH.