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US 8,168,111 B2Granted
Injection moulding method
AssigneeEngel Austria GmbH
InventorGeorg Steinbichler
Life of this patent
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Abstract
An injection molding method in which plastic material under pressure is injected from a storage chamber with a closable outlet into a mold cavity and fills same under pressure, wherein the volume of the storage chamber and the pressure obtaining therein upon opening of the closure means are of values which are sufficient for filling of the mold cavity by expansion of the material in the storage chamber, and the storage chamber is arranged in the mold forming the mold cavity.
Claims5
An injection molding method comprising:
- injecting plastic material under pressure from a storage chamber with a closable outlet that is closable by closure means, into a mold cavity formed by a mold, for filling the mold cavity under pressure, wherein the volume of the storage chamber and the pressure therein upon opening of the closure means are selected to have values which are sufficient for filling of the mold cavity substantially only by expansion of the material in the storage chamber, and wherein the storage chamber is arranged in the mold forming the mold cavity.
Dependencies are inferred from the claim text.