Die for producing very wide, flat, plastic-based structures

A plastic-based, mold-based technology, used in the field of forming a three-dimensional plastic-based structure and equipment including the mold, and the mold field for preparing a thermoplastic polymer-based structure

Inactive Publication Date: 2008-05-28
SOLVAY SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, the present invention aims to solve the problem of preparing plastic-based composites with a wide and homogeneous structure

Method used

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  • Die for producing very wide, flat, plastic-based structures
  • Die for producing very wide, flat, plastic-based structures
  • Die for producing very wide, flat, plastic-based structures

Examples

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Embodiment Construction

[0045] In the particular embodiment of the mold shown in the figures, the base 1 of the flat mold has an upstream edge 2 through which the molten plastic arrives through an inlet channel (not shown) and passes through the mold. The four orifices 3 and enter. Molten plastic is discharged through the downstream edge 4 . The upper part of the base 1 defines a flow plane (P) (only shown in FIG. 1 a ) in which a web of generally flat plastic flows within the mold 1 in a flow direction (E) (only shown in FIG. 1 a ).

[0046] The flat die shown comprises four grooves 5 for supplying molten plastic, which are placed parallel and equidistant from each other and in a flow plane (P) parallel to the flow direction (E) extend. Each feed trough 5 comprises a downstream orifice 6 for discharging the plastic into a distribution channel 7 in a direction (E) for distribution approximately perpendicular (considering its meandering shape) to the direction of flow (E). In the longitudinal direc...

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PUM

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Abstract

Die for producing very wide, flat, plastic-based structures Die for producing very wide, flat, plastic-based structures consisting of a base (1) and a cover (1bis), and comprising : - a plurality of ducts (5) for feeding molten plastic, opening into a distribution channel (7); - a longitudinal outflow slot (13) for outputting the molten plastic in the form of a substantially flat structure; the distribution channel (7) and the outflow slot (13) communicating via a plurality of distributors (8) of generally triangular section having a downstream apex (6), near to which a feed duct (5) emerges, and two upstream apexes forming intersections of the distribution channel (7) and of the outflow slot (13), each feed duct (5) being fed with molten plastic via an upstream orifice (3) of the die that is specific thereto.

Description

technical field [0001] The present invention relates to a mold for making very wide flat plastic-based structures, and more particularly, to a mold for making thermoplastic polymer-based structures. The invention also relates to an apparatus for forming three-dimensional plastic-based structures and comprising said mould. Background technique [0002] Many industries (automotive, structural engineering, shipbuilding, etc.) use very wide (greater than 1 meter, even up to 2 or 3 meters) flat structures (plates, sheets, nets) made of plastic. The plastics used to form these structures are typically thermoplastic polymers, such as PVC, which have low thermal stability (known as "heat sensitivity") and / or are often sticky, even at elevated temperatures. When these polymers flowed into very wide conventional flat dies, the edges of the resulting structures degraded after several hours of extrusion due to the excessive time spent in the transverse molten polymer distribution chann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/14B29C47/70B29C48/07B29C48/11B29C48/305
CPCB29C47/0019B29K2027/06B29C47/14B29K2023/12B29C47/0028B29K2023/06B29K2027/16B29C47/705B29K2077/00B29C48/07B29C48/11B29C48/305B29C48/705
Inventor 克洛德·德埃诺多米尼克·格朗让弗洛伦廷·朗古谢
Owner SOLVAY SA
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