Arrangement for producing a hollow shaped body
AssigneeSchade KG
InventorsHarald Strunk, Kurt Gohr
Life of this patent
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Abstract
A hollow injected shaped body of synthetic plastic is produced by injecting a predetermined quantity of a synthetic plastic melt into a multi-part mold, and forming the melt to the shaped body by a gas under pressure. After bringing the synthetic plastic melt into the mold cavity, the gas is injected into the synthetic plastic melt, then after overcoming the shaped body wall it flows into an overflow chamber from it into a gas circulation system so that during the forming of the melt a hollow formed in the shaped body is continuously supplied with the gas until rigidification of the shaped body.
Claims10
An arrangement for producing a hollow injected shaped body of synthetic plastic material, comprising a multi-part mold having a hollow and an overflow chamber sealed from atmosphere;
- and means for injecting gas into the synthetic plastic melt in the mold so that the gas flows into said overflow chamber after overcoming a wall of the shaped body and from the overflow chamber flows into a gas circulation system, and then again flows from the gas circulation system into the mold, so that during forming the melt to the shaped body the gas continuously flows through said hollow of the same shaped body until rigidification of the shaped body.
Dependencies are inferred from the claim text.