Extruded Product
An extruded product such as a weather strip for a vehicle is extruded by sheet production extruder. In this case, after extrusion molding is effected by using a material such as synthetic rubber, a thermoplastic elastomer, or the like, in the case of the synthetic rubber the extruded piece is vulcanized in a vulcanizing device to thereby form the extruded product. After the extruded product is then cut to a predetermined size, corner portions and the like are formed by injection molding, and a product such as a weather strip for a vehicle is thereby obtained.
For this reason, a twin screw extruder is to provide an extruded product in which a decoration layer matching interior products in the vehicle compartment and having a surface pattern giving a sense of high quality can be provided easily at low cost. To attain the above object, in accordance with a first aspect of the invention there is provided an extruded product formed by extrusion molding and continuing in a longitudinal direction, comprising: an extruded product body; and a decoration layer provided integrally on a surface of the extruded product body, wherein the decoration layer is provided on a substantially entire surface of the decoration layer by combining an irregular surface pattern and a plurality of linear grooves on the surface thereof, and a depth of the linear groove is deeper than a depth of the irregular surface pattern.
In the first aspect of the invention, the single screw extruderformed by extrusion molding and continuing in a longitudinal direction has the extruded product body and the decoration layer provided integrally on the surface of the extruded product body. Therefore, the color and the material of the decoration layer can be selected separately from the extruded product, and it is possible to easily change the color and the like of the decoration layer in correspondence with an environment in which the extruded product is used. Hence, this arrangement is favorable in terms of design.
The decoration layer is provided integrally with the extruded product body, and the decoration layer can be formed continuously in a series of process after the extrusion molding of the extruded product.
In the invention, since the sheet production extruder has the decoration layer provided integrally on the surface of the extruded product body, the color and the material of the decoration layer can be selected separately from the extruded product, and it is possible to easily change the pattern and the like of the decoration layer in tune with the design of the place where the extruded product is used. Hence, this arrangement is favorable in terms of design.
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