Apparatus for extrusion molding utilizing clamping devices and means for releasing compressed air
OwnerIng Chung Huanginventor
Life of this patent
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Abstract
An apparatus for extrusion molding that includes an extruding die that permits extrusion of a material into a hollow tubular molding, a molding die, first and second clamping devices and a device for releasing compressed air. The first and second clamping devices are positioned along opposite end portions of the molding die and configured to clamp the molding independently from one another to form an air-tight space therebetween. The molding die includes two die cavity halves and is arranged to close around the air-tight space and compress the molding to conform the same to a final product configuration. The device for releasing compressed air is arranged to release compressed air before the die cavity halves are separated.
Claims13
An apparatus for extrusion molding comprising:
- a) an extruding die for extruding a material into a hollow tubular molding;
- b) a first clamping device arranged to clamp a first molding portion;
- c) a second clamping device arranged to clamp a second molding portion, said first and second clamping devices being positioned along the length of the molding in a spaced relationship and configured to clamp the molding independently of one another, wherein said first clamping device clamps said first molding portion to permit stretching thereof and said second clamping device is arranged to clamp said second molding portion after said first clamping device clamps said first molding portion to thereby form an air-tight space within the molding between the first and second clamping devices;
- d) a molding die including a pair of corresponding die cavity halves closeable around the air-tight space of the molding between the clamping devices to compress the molding and conform same to a final product configuration of the die cavity;
- and
- e) means for releasing compressed air from the final product configuration wherein said means releases compressed air from said final product configuration of said molding before said die cavity halves are fully separated.
An apparatus for extrusion molding comprising:
- a) an extruding die for extruding a material into a hollow tubular molding;
- b) a first clamping device arranged to clamp a first molding portion;
- c) a second clamping device arranged to clamp a second molding portion, said first and second clamping devices being positioned along the length of the molding in a spaced relationship and configured to clamp the molding independently of one another, wherein said first clamping device clamps said first molding portion to permit stretching thereof and said second clamping device is arranged to clamp said second molding portion after said first clamping device clamps said first molding portion to thereby form an air-tight space within the molding between the first and second clamping devices;
- d) a molding die including a pair of corresponding die cavity halves closeable around the air-tight space of the molding between the clamping devices to compress the molding and conform same to a final product configuration of the die cavity;
- and
- e) means for releasing compressed air from the final product configuration, said means forming a portion of one die cavity half wherein said means forms a thin walled region along a side of said final product configuration of said molding.
Dependencies are inferred from the claim text.