JPS5896534A - Manufacture of weatherstrip with nap - Google Patents

Abstract

PURPOSE:To produce efficiently the titled article impreved in slidability on a windowpane of an automobile or the like, by combining in a die a plastic good in slidability on glass and a plastic having rubberiness, and forming fibrous members on the plastic good in slidability on glass. CONSTITUTION:Two extruders are connected with the die body 2 and a mouthpiece 3 having a plurality of minute projections 8 and an outlet with a prescribed shape. A plastic (e.g. a rigid vinyl chloride resin) good in slidability on glass is fed to the extruder 1 and is led to the minute projections 8 of the mouthpiece. On the other hand, a plastic (e.g. a soft vinyl chloride resin) having rubberiness is fed to the extruder 1', and is led to the part 9 other than the minute projections 8 of the mouthpiece. At the moment when the two materials are merged and extruded from the mouthpiece, a moving cutter 5 makes slits into the extrudate so that the slits have a prescribed depth and a prescribed interval therebetween, and at the same time the extrudate is extended, so that a plurality of fibrous members 9' are formed on the extrudate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves coextrusion molding of a plastic material such as a synthetic resin that has good sliding properties with glass and a plastic material that has rubber elasticity such as a synthetic resin.
This invention relates to a method for producing (Quezers) 9 whelks having smaller naps.

Conventionally, Uniday strips are made by extrusion molding (4), and the molded body is subjected to secondary processing, such as electro-flocking with microfibers to add ζ-fleece to car windows, etc. It is known that there are.

However, secondary processing is inefficient and expensive, and flocking etc. has the disadvantage that the two fibers come off during use, reducing the sliding function with the glass.

In order to eliminate these drawbacks, the present invention combines a plastic material such as a synthetic resin that has good sliding properties with glass and a plastic material such as a synthetic resin that has rubber elasticity in a goo, and also has good sliding properties with glass. The present invention relates to a method C1 for continuously manufacturing Kuedes (9) tubes, which form small naps with a good plastic material and efficiently improve the sliding function of window glass for automobiles, etc.

That is, as shown in the figure, a die is generally used (1) for coextrusion, and is equipped with a movable cutter (2) to form a nap on the outside.

The present invention is designed for co-extrusion molding using a conventional weather strip die, and has a goo tip (a large number of protrusions (8) as shown in Figure 1).
This (= making a cut perpendicular to the extrusion direction with a moving cutter C: simultaneously making an incision (= elongating the molded body) (= making a large number of small naps with sliding properties (cA) easily and efficiently The present invention provides a method for manufacturing a weather strip for window glass of automobiles, etc., which is characterized by double-wire molding and has small naps that have good sliding properties with glass.

The cutter may be moved by attaching it to a rotating body as shown in the figure, or by moving the cutter linearly or vertically along a curved surface.

In the present invention, small naps (φ is usually hard vinyl chloride, hard to semi-hard vinyl chloride, E
It is made of synthetic resin such as VA, ABS, nylon, PK, etc., and the molded body (9) other than small naps is made of soft vinyl chloride,
It is made of a synthetic resin with elasticity such as EVA, EP rubber, or EPDM, but on the other hand, it is made of a small raised material that has good sliding properties with glass (lower part I: is a molded product (9) (binary synthetic resin). etc. can also be formed arbitrarily.

In addition, other than the part of the molded body with small raised hairs (: is internal C;
Stainless steel, aluminum, etc. may be used as an inner material and extruded.

An embodiment of the present invention will be explained with reference to drawing C;

(1) (11 is the extruder, (2) is the goo body, (3) is the mouthpiece attached to the goo body, (4) is the rotating body with the cutter attached, (5) is the cutter, (6) is the rotation (7) is a pulling machine, (91 is a small raised material having sliding properties, and (9) is a molded body other than the small raised material.

In the above device, the synthetic resin, etc. extruded from the extruder (1) is guided to the small protrusion (8) H by the mouthpiece (3), while the synthetic resin, etc. extruded by the extruder (x5) is Passes through the main body (2), merges with the small protrusion (8) at the cap (3),
This results in a molded object (9) other than small naps.

Next (2) At the same time as the molded body is taken up by the take-up machine (7), the rotary body (4) is rotated via the drive motor. The cutter (5) attached in advance to the rotary body C2 is also rotated at the same time. A small raised tm with sliding properties is formed, and it is possible to efficiently and economically produce Quesas)9 tubes.

It should be noted that the curved raised part (seedling) may be designed in accordance with the desired shape 1, such as cutter shape and vertical movement mechanism.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is an enlarged front view of the base, and FIG. 3 is a cross-sectional view and perspective view (B) of the molded body.
and FIG. 4 is a sectional view C) (to) of a molded body of another shape.

Claims (1)

[Claims] A cap (3) with a predetermined outlet shape having a large number of small protrusions (8)
) and die body (2) with two extruders connected to extrusion J
ll (1) 4: supplies a plasticized resin with good sliding properties with glass and guides it to the small protrusion (8) of the mouthpiece, while the extruder (r) <: supplies a resin with rubber elasticity. of the plastic material, and it covers the parts of the cap other than the small protrusions (8) (9).
) and moves at the moment the two materials are combined and extruded from the mouthpiece (3). l: Therefore, the small protrusions (8) 4: have the required depth and spacing At the same time as making the incision, I: elongating the extruded material (Secondly, a method for manufacturing a feather strip having raised hairs, characterized in that the small protrusions are made into a large number of small raised pieces (CA).