Guiding of a cut-open parison
First Claim
1. A device for partitioning an extruded or coextruded plastic parison to give at least one semifinished open-surface product comprising at least one means of partitioning the plastic parison and at least one draw-off means for pulling the plastic parison over the means of partitioning thereby compensating for a resistance of the means of partitioning, wherein the draw-off means is heatable or coolable and the means of partitioning the plastic parison is a body of triangular cross section which has been arranged transversely to a direction of extrusions,wherein the draw-off means has been set into recesses on the means of partitioning the plastic parison.
5 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a device for partitioning the plastic parisons to give at least one semifinished open-surface product (6), where the device encompasses at least one means of partitioning (3) the plastic parison and one means of drive (2). The means of drive may be composed of one, but preferably of two, driven rolls. It has been found that use of the device of the invention can reduce or prevent the production of creasing and irregularity at the margins, i.e. at the cut edges, of the partitioned parisons, i.e. of the resultant semifinished sheets.
16 Citations
23 Claims
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1. A device for partitioning an extruded or coextruded plastic parison to give at least one semifinished open-surface product comprising at least one means of partitioning the plastic parison and at least one draw-off means for pulling the plastic parison over the means of partitioning thereby compensating for a resistance of the means of partitioning, wherein the draw-off means is heatable or coolable and the means of partitioning the plastic parison is a body of triangular cross section which has been arranged transversely to a direction of extrusions,
wherein the draw-off means has been set into recesses on the means of partitioning the plastic parison.
- 8. A process comprising partitioning an extruded or coextruded plastic parison to give at least one semifinished open-surface product, with a device comprising at least one means of partitioning the plastic parison and at least one draw-off means for pulling the plastic parison over the means of partitioning thereby compensating for a resistance of the means of partitioning, wherein the draw-off means is heatable or coolable and the means of partitioning the plastic parison is a body of triangular cross section which has been arranged transversely to a direction of extrusion, wherein the draw-off means has been set into recesses on the means of partitioning the plastic parison.
Specification