JPH06126839A - Method for forming of weatherstrip end - Google Patents

Abstract

PURPOSE:To improve workability of end forming wherein an end opening of a hollow sealing part of a weatherstrip is worked by squashing. CONSTITUTION:A hotmelt type adhesive 5 is stuck to a surface of a heated metal sheet 7 and fused. The metal sheet 7 which is covered with the fused adhesive 5 is inserted into an end opening 321 of a hollow sealing part 32 of a weatherstrip. While an end of the sealing part 32 are being pushed from up and down with metal molds 6A, 6B so as to pinch the metal sheet 7, the metal sheet 7 is extracted. The end of the sealing part 32 is fusion welded via a fusing adhesive 5 to be closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip end forming method, and more particularly to a weather strip end forming method having a hollow seal portion.

[0002]

2. Description of the Related Art A weather strip having a hollow seal portion is attached to a door opening edge of an automobile or a peripheral edge of a door.

FIG. 3 shows a typical example of this type of weather strip, which is a door opening edge 2 of a hardtop type automobile.
A weather strip 3 is attached along the lower half of the. The weather strip 3 has a trim portion 31 having a U-shaped cross section, which is attached to a flange formed on the door opening edge 2.
And a hollow seal portion 32 protruding from one side surface thereof.
Is integrally provided, and when the door 1 is closed, its peripheral edge is pressed against the seal portion 32.

At both ends (upper end) A of the weather strip 3, the opening of the seal portion 32 is closed by crushing. Then, both ends of a weather strip (not shown) attached along the upper half (roof side) of the door opening edge 2 are superposed on the crushed ends.

Terminal forming by crushing is generally performed as shown in FIG.
As shown in (A), rubber glue 4 is applied to the inner surface of the terminal of the seal portion 32.
And apply the weather strip 3 as shown in FIG. 4 (B).
The terminal is pressed by sandwiching it between the lower mold 6A and the heated upper mold 6B.

[0006]

By the way, in the above-mentioned conventional terminal molding method, the work of applying the rubber paste 4 to the inner surface of the hollow seal portion 32 is troublesome. Since it is difficult to apply the rubber glue 4 to a deep part of the portion 32, the workability is not good, such as cutting the seal portion 32 and applying the rubber glue 4 from the cut opening to the inner surface. In addition to the application of the rubber paste 4, it takes time to vulcanize and bond the seal portion 32 via the rubber paste 4, and improvement in workability has been desired.

In view of the above situation, the present invention has been made to improve the workability of a terminal molding method for crushing the terminal of the hollow seal portion of a weather strip.

[0008]

According to the present invention, a hot melt adhesive 5 is adhered to the surface of a metal plate 7 heated as shown in FIG. 2 (A) and melted as shown in FIG. 2 (B). The metal plate 7 covered with the hot melt adhesive 5 is
As shown in (C), the weather strip 3 is inserted into the end opening 321 of the hollow seal part 32, and the ends of the seal part 32 are sandwiched with the metal plate 7 and the molds 6A, 6
2B, the metal plate 7 is pulled out from the seal portion 32 while being pressed as shown in FIG. 2D, and the end of the seal portion 32 is inserted through the hot melt adhesive 5 as shown in FIG. 2E. Is fused and closed.

[0009]

The molten hot melt adhesive 5 can be applied to the metal plate 7 by burying the heated metal plate 7 in the adhesive powder. The crushing process can be performed by inserting the molten adhesive 5 into the terminal opening 321 of the hollow seal portion 32 and pulling it out while being pressed by the unheated molds 6A and 6B.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a weather strip end-formed by crushing according to the present invention. The weather strip 3 is an extruded body, and a trim portion 31 made of solid rubber and having a U-shaped cross section and a trim. It has a hollow seal portion 32 made of sponge rubber joined to one side surface of the portion 31. A holding lip 311 for holding a flange provided on the door opening edge 2 (FIG. 3) of the automobile extends from the inner facing surface of the trim portion 31. The terminal 32 of the seal part 32
0 is flattened by crushing and is closed.

Crushing of the end opening of the seal portion 32 is performed as follows.

As shown in FIG. 2A, a powdery hot melt adhesive 5 is attached to the end surface of the metal plate 7 having a width that can be inserted into the hollow seal portion 32 (FIG. 1). .
The attachment is performed by inserting and embedding the end of the heated metal plate 7 in the powder. Then, the adhered adhesive 5 is melted, and the end portion of the metal plate 7 is covered with the melted adhesive 5 as shown in FIG. As the adhesive 5, a polyethylene or polypropylene hot melt adhesive is used.

On the other hand, as shown in FIG. 2C, the trim strip 31 at the end of the weather strip 3 is attached to the middle mold 6 of the mold.
It is held by C and set on the lower mold 6A. Then, the end portion of the metal plate 7 covered with the molten adhesive 5 is inserted into the terminal opening 321 of the seal portion 32.

Next, as shown in FIG. 2D, the end of the hollow seal portion 32 into which the end portion of the metal plate 7 is inserted is connected to the cooling upper die 6
Press from above with B. Then, while pressing, the metal plate 7
Is removed from the seal portion 32.

Then, as shown in FIG. 2 (E), the cooling upper mold 6
The pressing by B is continued, and the end of the seal portion 32 is brought into pressure contact with the molten adhesive 5 therebetween. As a result, the inner surface of the end of the seal portion 32 is heated by the molten adhesive 5 and is fused via the adhesive 5. Then, as shown in FIG. 1, the terminal 320 of the seal portion 32 is crushed and closed.

[0016]

As described above, the adhesive can be easily applied to the inside of the terminal opening of the hollow seal portion, and the time required for solidification of the hot-melt adhesive can be shortened as compared with the conventional adhesive. The workability of molding is greatly improved. In addition, since heating is required only at the edge of the metal plate, power consumption is reduced compared to the conventional case where the upper die is heated.

[Brief description of drawings]

FIG. 1 is a perspective view showing a terminal portion of a weather strip formed by the present invention.

FIG. 2 is a diagram showing a step of terminal molding according to the present invention.

FIG. 3 is a diagram showing a weather strip to which the present invention is applied and a mounting portion thereof.

FIG. 4 is a diagram showing a conventional terminal molding process.

[Explanation of symbols]

 1 Automotive Door 3 Weather Strip 32 Hollow Seal 5 Hot Melt Adhesive 6A, 6B, 6C Mold 7 Metal Plate

Claims (1)

[Claims] 1. A terminal molding method for crushing and closing a terminal opening of the seal portion of a weather strip having a hollow seal portion, wherein a hot-melt adhesive is adhered to the surface of a heated metal plate. Melted, insert the metal plate covered with molten adhesive into the terminal opening of the seal part,
A terminal method for weather strip, characterized in that the metal plate is pulled out from above and below while sandwiching the metal plate between the ends of the seal portion, the metal plate is pulled out, and the terminal is fused and closed via a molten adhesive.