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Rotational molding (BrE: moulding) involves a heated mold which is filled with a charge or shot weight of the material. It is then slowly rotated (usually around two perpendicular axes), causing the softened material to disperse and stick to the walls of the mold forming a hollow part.
Cylinders and shapes with rotational symmetry are most commonly cast by this technique. Long castings are often produced with the long axis parallel to the ground rather than standing up in order to distribute the effect of gravity evenly. Thin-walled cylinders are difficult to cast by other means.
Spin casting is a favored method for fabricating items in the specified materials – low temperature metals and thermoset plastics. Compared to the two main competing processes, injection molding and (zinc) die-casting, spin casting has significant advantages in terms of startup cost and ease of use.
Cube mold technology (also known as Rotating cube mold technology or Stack-turning molding) is a molding process for the manufacture of plastics components. This molding process allows to manufacture circular parts. This technology was introduced by Foboha (a business unit of Barnes Group) and Arburg. [1] [2] [3]
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Manufacturing processes This section does not cite any sources.
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For example, in rotational molding, to identify the environmental stress crack resistance of a sample, the notched constant tensile load test (NCTL) is put to use. [8] Owing to these desirable properties, pipes constructed out of HDPE are ideally applicable for drinking water [9] and waste water (storm and sewage). [10]
"Good" molds are used to produce certain cheeses, for example. A type called penicillium roqueforti is used to make blue cheeses like roquefort, gorgonzola and stilton, the experts note.