Process for the manufacture of a profile part

Details Process for the manufacture of a profile part Process for the manufacture of a profile part

1996-01-11

1998-04-07

Ahmad, Nasser

Stock material or miscellaneous articles

Structurally defined web or sheet

Including fastener for attaching to external surface

494901, 527165, 264171, 2641771, 26417718, 428 31, 428122, 428358, B32B 306

Patent

active

057362157

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND

The invention relates to a process for the manufacture of a profile part in which at least one profile section of an elastomeric material is connected to at least one fastening section and the compound profile thus created is made into the desired shape.
In one known process of this type (Patent Abstracts of Japan, Vol. 17, No. 368 (M-1443) an extruder 27 feeds thermoplastic plastics material 29 directly into a multi-component extrusion head 25. In the extrusion head this plastics material forms a base member which, together with a sealing member of flexible rubber, is co-extruded from the extrusion head. The combined profile 33 travels into a vulcanizing tank 31 in which the sealing member is vulcanized.
In the known so-called "stretch bending" process, the fastening section consists of a metallic reinforcement. The finished compound profile is here bent into the particular shape in which it is finally to be used as a profile part on a motor vehicle using special tools and in a manner which is costly to carry out. Because of the constructional tolerances, during the fitting, one regularly has to carry out costly adjustments to the compound profile which has been stretched and bent.
From Patent Abstracts of Japan, Vol. 5, No. 158 (M-091), it is known per se initially to extrude a tube 2 of polyamide from an extruder 1. The tube is subsequently cooled and passed through a braiding machine 4 which applies a reinforcing layer 5 of brass-plated or zinc-plated wire. A subsequent extruder 6 generates an outer coating 7 of rubber which is vulcanized in a vulcanizing installation 8 and is connected to the wire reinforcement layer 5.
From EP 528 560 A1 it is known per se to supply thermoplastic plastics material 19, 21 and unvulcanized rubber 13, 15 to a multi-component extrusion head 17. The result is a combination profile 10a whose base portion 1 is of rubber. individual surface strips of the base portion are overlaid with thin anti-friction layers 11 of the thermoplastic plastics material.
From EP 483 758 A1 it is known per se to co-extrude a profile 11 having a base portion 12 of rubber and a sealing portion 13 of sponge rubber which has a drainage lip 14. The base portion is fixed by fastening members 4 which extend through mounting holes in a vehicle body panel.
From Patent Abstracts of Japan, Vol. 17, No. 483 (M-1472) it is known per se to lock a sealing lip 4 of a profile to a base member 2 by means of a connecting part 9. In order to assemble the profile the sealing lip 4 is pivoted away so that the base portion 2 can be fixed by screws 10 to the bodywork. Subsequently, the sealing lip 4 is pivoted back, whereupon the coupling members 17, 20 engage in each other.
From DE 37 891 A1 the co-vulcanization of thermoplastic plastics materials and elastomeric materials is known per se. Mention is made of a process involving a two-stage extrusion method, which is expensive in terms of time and production.
From DE 42 19 344 A1 it is known per se to manufacture a part 1 in a shaping tool 4 to 7 by a sandwich injection molding where the part has a core 3 of a resin mixture, chiefly of PP (page 5, lines 50 and 51), and a skin layer 2 of a resin (page 5, line 55), namely a thermoplastic elastomeric material based on styrene, which mainly consists of SEBS (page 5, lines 49 and 50).
From DE 39 34 091 A1 it is known per se to create compound bodies in two steps, the compound bodies consisting of a thermoplastic material reinforced by endless fibers and of rubber, and which can be fixedly connected to each other by vulcanization without the use of adhesive means, primers or glue. As a rule, in the first step, the thermoplastic material is bonded to a fibrous strengthening support, for example a web, UD tape and the like.
From DE 38 35 211 A1 it is known per se to extrude from a common extrusion head 21 a sealing strip 1 consisting of a U-shaped clamping strip 4 of hard rubber, a complete sleeve 5 completely around the clamping strip 4 and having lips 9, 10 of soft rubber and a sealing tube 3 of expanded rubber.

REFERENCES:
patent: 4187270 (1980-02-01), Bartrum
patent: 4381273 (1983-04-01), Azzola
patent: 4595546 (1986-06-01), Wheeler, Jr.
patent: 5137675 (1992-08-01), Rabe
patent: 5256361 (1993-10-01), Keys
patent: 5267846 (1993-12-01), Miyama et al.
patent: 5334458 (1994-08-01), Powers et al.
patent: 5411785 (1995-05-01), Cook
patent: 5415822 (1995-05-01), Cook
patent: 5562961 (1996-10-01), Buchholz et al.
"Einstig in die Kuntstoffchemie" 3rd Edition by B. Gnauck and P. Frundt, published by Carl Hanser Verlag, Munich, Vienna, 1991, p. 31.
Japanese Abstract, vol. 5, No. 158 (M-091), "Preparation of Hose" Jul. 1981.
Japanese Abstract, vol. 17, No. 368, (M-1443) "Manufacture of Weatherstrip" Sep. 1993.
Gummibereifung Jun. 1988, pp. 48 and 50 "Gummi-ein Werkstoff nach MaB".
Japanese Abstract, vol. 17, No. 483 (M-1472).

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