Process for the fabricating of reinforced plastic drain...

B - Operations – Transporting – 29 – C

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B29C 70/48 (2006.01) B29C 70/20 (2006.01) E02D 29/14 (2006.01)

Patent

CA 2315876

Process for fabricating a rein- forced drain cover, characterised by the fact that it consists of moulding (4) a number of reinforcement layers (7) composed of one or more fibre strands (8) with a predetermined diameter (D2), which in tum are composed of inter- woven fibres (9) or bundles of fibres (9), and there interwoven a certain num- ber of extending fibres at the exterior perimeter of the fibre strands (8) with a certain length (L) and the layered spac- ers extending themselves in between, horizontally and vertically, preferably with a higher rigidity than the armour- ing strands (8). The filling of the mould with plastic (11), so that all fibres (9) and fibres (9.1) extending at the exte- rior perimeter of the fibre strands (8) have a maximum contact with the in- jected plastic (11), by covering the fi- bre strands (8) with one predetermined thickness (D4) and (D5) of the plastic covering layer, and after hardening of the plastic (11), the removal of the thus obtained drain cover (1) from the mould (4).

La présente invention concerne un procédé pour la fabrication de couvercle de drain, caractérisé en ce qu'il consiste à mouler (4) un certain nombre de couches de renforcement (7) constituées d'un ou de plusieurs fibres de base (8) ayant un diamètre prédéterminé (D2), qui à leur tour sont constitués de fils (9) ou faisceaux de fils (9) entrecroisés, contenant un certain nombre de fils allongés entrecroisés dépassant au pourtour extérieur des fibres de base (8) d'une certaine longueur (L) et les couches intercalaires s'étendant entre ceux-ci, horizontalement et verticalement, de préférence présentant une rigidité supérieure à celle des fibres de renfort (8). Puis, le moule est empli de plastique (11), de manière à ce que tous les fils (9) et les fils (9.1) dépassant au pourtour extérieur des fils de base (8) soient en contact maximal avec le plastique (11) injecté, en recouvrant les fils de base (8) d'une couche de revêtement d'une épaisseur prédéterminée (D4) et (D5), et après durcissement du plastique (11), retirer le couvercle (1) de drain ainsi obtenu du moule (4).

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