Claims
- 1. A process for the production of a hollow chamber plate of synthetic material, comprising the steps of:
- (i) continuously supplying a plurality of prefabricated webs at a temperature below their softening point,
- (ii) extruding a first cover layer in a thermoplastic condition onto a continuous belt heated to the melting temperature of said first cover layer and contact said webs and said first extruded cover layer, wherein when contacted, said first extruded cover layer is in a thermoplastic condition and said webs are at a temperature below their softening point,
- (iii) cooling said contacted first extruded cover layer to below its softening temperature by cooling said continuous belt and indirectly said first cover layer,
- (iv) extruding a second cover layer in a thermoplastic condition onto a continuous belt heated to the melting temperature of said second cover layer and contacting said web and said second extruded cover layer, wherein when contacted, said second extruded cover layer is in a thermoplastic condition and said webs are at a temperature below their softening point, and
- (v) cooling said contacted second extruded cover layer to below its softening temperature by cooling said continuous belt and indirectly said second cover layer.
- 2. The process of claim 1, wherein said extruding steps comprise producing said first and second cover layers in a termoplastic condition by extrusion immediately before said contacting.
- 3. The process of claim 1, wherein said continuously supplying step comprises arranging one or more of said prefabricated webs at various distances from adjacent webs within said plurality of prefabricated webs.
- 4. The process of claim 3, wherein said webs are arranged such that said webs alternatingly touch adjacent webs or are set at a small distance from said adjacent webs.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3526752 |
Jul 1985 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 06/884,799, filed on July 11, 1986, now abandoned.
US Referenced Citations (6)
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Continuations (1)
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Number |
Date |
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Parent |
884799 |
Jul 1986 |
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