Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Reexamination Certificate
1999-03-02
2001-04-17
Lorin, Francis J. (Department: 1775)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
C264S171230
Reexamination Certificate
active
06217807
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a molding for an automobile and its manufacturing method. Particularly, the molding is a window molding, an outer molding, an inner molding, or a roof molding of weatherstrip to be mounted on vehicles like automobiles, wherein a metal piece is embedded in a molding body made of a synthetic resin and is joined rigidly and integrally to the synthetic resin of the molding body.
DESCRIPTION OF PRIOR ART
The known moldings of this kind which have an embedded metal piece are commonly formed so as to integrally join a molding body made of a polyvinyl chloride to the metal piece by using an adhesive to adhere the metal piece to the molding body.
In the known molding as described above, it is difficult to uniformly apply the adhesive onto the periphery of the metal piece, and it is required to set up a separate manufacturing line for performing a drying process to volatilize a solvent contained in the adhesive. Thus, the production efficiency is reduced considerably depending on the time required for the drying process, and an unpleasant odor caused by the volatilization of the adhesive solvent in the drying process results in a harmful environment in the manufacturing factory, and also results in air pollution. Thus, from an environmental perspective it is desirable that the adhesive with solvent be eliminated.
SUMMARY OF THE INVENTION
An object of the present invention is, in order to resolve the problems of the prior art as described above, to provide a molding for an automobile and its manufacturing method, wherein a metal piece to be embedded in a molding body made of a synthetic resin is joined integrally and rigidly to the molding body without using any adhesive containing a solvent. This is accomplished by employing a polar group containing thermoplastic resin composition that is capable of bonding efficiently to a metal while the resin is in a molten condition.
Another object of the present invention is to provide a molding for an automobile and its manufacturing method, wherein the molding body is made of an olefin based resin or a styrene based resin, which does not pollute the environment as does a dioxin or the like, and which contributes to lessening the automobile's weight because of its low specific gravity. The olefin based resin or styrene based resin is fusibly joined to a polar group containing thermoplastic resin composition that is fusibly bonded on the periphery of a metal piece.
Still another object of the present invention is to provide a molding for an automobile and its manufacturing method, wherein a polar group containing thermoplastic resin composition is fusibly bonded to the periphery of a metal piece except for a portion thereof, and a synthetic resin of the molding body is extruded onto the polar group containing thermoplastic resin composition bonded to the metal piece, whereby the metal piece is exposed along the longitudinal direction of the molding body and provides a decorative effect.
A molding for an automobile according to the present invention includes a molding body comprising a vertical support made of a synthetic resin, and a decorative section made of a synthetic resin formed integrally with the vertical support, along with a metal piece embedded in the vertical support and the decorative section, wherein the metal piece is joined integrally to the molding body by use of a polar group containing thermoplastic resin composition. The molding body according to the present invention includes a longitudinal aperture in the decorative section to outwardly expose the metal piece.
A manufacturing method for the molding for an automobile comprises the steps of: feeding continuously a metal piece to a molding die; fusibly bonding an adhesive resin layer of a polar group containing thermoplastic resin composition, which has been poured into a first extrusion molding machine, to the metal piece in the molding die; fusibly joining an olefin based resin or styrene based resin which has been poured into a second extrusion molding machine, to the adhesive resin layer laminated on and bonded to the metal piece; continuously forming a molding having the metal piece bonded integrally and rigidly to the olefin based resin or styrene based resin via the adhesive resin layer; feeding the molding by a transporting device into a cooling water pool to vulcanize or cure the resin; and cutting the molding to a given dimension by using a cutter. The adhesive layer of the polar group containing thermoplastic resin composition is bonded onto the metal piece, and the resin or the molding is joined to the adhesive layer such that a portion of the metal piece is outwardly exposed.
A modification of the manufacturing method for the molding for an automobile according to the present invention comprises the steps of: feeding a metal piece continuously to a first molding die and a second molding die; fusibly bonding a polar group containing thermoplastic resin composition, which has been poured into a first extrusion molding machine, to the metal piece in the first molding die; fusibly joining an olefin based resin or styrene based resin, which has been poured into a second extrusion molding machine, to the adhesive resin layer laminated on and bonded to the metal piece in the second molding die; continuously forming a molding having the metal piece joined integrally via the adhesive layer; feeding the molding into a cooling water pool by a transporting device to vulcanize or cure the resin; and cutting the molding to a given dimension by operating a cutter.
REFERENCES:
patent: 60-079926 (1985-05-01), None
patent: 7-615142 (1995-12-01), None
Kato Katsuhisa
Miyakawa Naohisa
Lorin Francis J.
Tokiwa Chemical Industries, Co., Ltd
Wenderoth , Lind & Ponack, L.L.P.
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