JPS602173B2 - Method for manufacturing a weather strip with napping - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a weather strip having small naps by co-extruding 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. It is something.

Weather strips are manufactured by extrusion molding and are processed through secondary processing, such as by electro-flocking microfibers, and are used for the windows of automobiles, etc. well known.

However, secondary processing is inefficient and therefore expensive, and flocking etc. has the disadvantage that fibers come off during use, reducing the ability to slide against 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 die, and moreover, The present invention relates to a method for continuously manufacturing weather strips in which small naps are formed using a plastic material having good properties, and which efficiently improves the sliding mechanism of window glasses of automobiles, etc.

That is, as shown in the figure, the die is generally used for coextrusion and is equipped with a movable cutter for forming the nap.

The present invention uses a conventional weather strip die for co-extrusion molding, forms a large number of protrusions 8 at the tip of the die as shown in the figure, and cuts perpendicularly to the extrusion direction with a moving cutter, simultaneously forming the die. 4. A window for automobiles, etc. having a raised surface with good sliding properties on glass, characterized in that a large number of small raised ends 9' having sliding properties can be easily and efficiently continuously formed by elongating the body. A method of manufacturing a weather strip for glass is provided.

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, 4 and brushed 9' have good sliding properties with glass.
is usually hard vinyl chloride, hard to semi-hard vinyl chloride, EV
A, made of synthetic resin such as ABS, nylon, PE, etc.
The molded body 9 other than small naps is made of soft vinyl chloride, EVA, and EP.
It is formed of a synthetic resin having elasticity such as rubber or EPDM, but the synthetic resin used for the molded body 9 may also be optionally formed at the bottom of the small raised portion 9' that has good sliding properties with glass. can.

Furthermore, stainless steel, aluminum, or the like may be inserted inside the molded body other than the portion having small raised portions, and extrusion processing may be performed.

Embodiments of the present invention will be described with reference to the drawings.

1. 1' is an extruder, 2 is a die body, 3 is a mouthpiece attached to the die body, 4 is a rotating body with a cutter attached, 5
is a cutter, 6 is a rotating body drive motor, 7 is a take-up machine,
9' is a small raised material having sliding properties, and 9 is a molded article other than small raised material.

In the above device, the synthetic resin etc. extruded from the extruder 1 is guided to the small protrusion 8 by the mouthpiece 3, and at the same time, the extruder 1'
The extruded synthetic resin passes through the die main body 2 and is combined with the small protrusions 8 in the die 3 to form a molded body 9 other than small naps.

Next, the molded body is taken up by a take-up machine 7, and at the same time, the rotating body 4 is rotated via a drive motor.

The cutter 5, which has been previously attached to the rotating body, rotates at the same time, forming the sliding brushes 4 and 9', making it possible to efficiently and economically manufacture weatherstrips. still,
The curved raised portion 9' may be designed according to the desired shape of the cutter shape, vertical movement mechanism, etc.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is an enlarged front view of the base, Fig. 3 is a sectional view A and perspective view B of the molded body, and Fig. 4 is a cross section of a molded body of other shapes. Figures C and D. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1 Two extruders are connected to the die body 2 and the die body 2 and the die 3 having a predetermined outlet shape having a large number of small protrusions 8.
A plasticized resin having good sliding properties with the glass is supplied and guided to the small protrusion 8 of the cap, while a plasticized resin having rubber elasticity is supplied to the extruder 1', and it is guided to the small protrusion 8 of the cap. Small protrusion 8
The cutter 5, which moves at the moment when the two materials are combined and extruded from the mouthpiece 3, makes a cut with the required depth and spacing in the small protrusion 8, and at the same time cuts the extruded material. A method for manufacturing a weather strip having raised hairs, which comprises stretching the material to form a large number of small raised parts 9'.