JPH03124431A - Surface treatment method for glass run of automobile - Google Patents

Abstract

PURPOSE:To improve lubricity, wear resistance and flexibility of the bottom part, by a method wherein a foam sheet is made by cutting beforehand a foam having self-lubricity such as high-molecular weight polyethylene into a fixed thickness and width, the foam sheet is applied to the bottom part of a glass run made of rubber through an adhesive for the rubber and after performance of integral extrusion molding of the same along with a glass run main body, vulcanization treatment is performed. CONSTITUTION:At the time of sliding of window glass, a foam sheet receiving great force with that moves the window glass up and down without resistance. Therefore, although it is necessary to give high wear resistance to make the coefficient of friction sufficiently low and lengthen its life, since the foam sheet 2 is formed by cutting the same into a desired thickness and width beforehand and stuck to the bottom 1b of a glass run main body 1, which responds sufficiently to the above requirement. Then even if the same is worn, since an opening part of the foam comes into point contact with the window glass 4, low sliding resistance is held always, heating is low and wear also becomes little that much. In addition, the foam sheet 2 is flexible and the window glass 4 is not damaged.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention seals between the end of a window glass that is vertically movably disposed on an automobile door and a door sash, and guides the window glass. This is an intermediate method for surface treatment of glass run.

<Conventional technology> This will be explained with reference to FIGS. 2 and 3.

A conventional automobile glass run has a pair of side walls 1a.

1a and the bottom part 1b are joined to have a U-shaped cross section, and seal lips 1c, 1c are formed extending from both sides of the front end of the frontage side walls 1a, 1a toward the center line, on which the window glass 4 slides. funeral bottom 1b and seal lip 1c,
In order to reduce the abrasion coefficient of the 1c surface and increase its lubricity, for example, electrostatic flocking may be applied, after molding and vulcanization, a low-sliding agent may be applied by spraying, or polyamide resin beads or hollow beads may be applied. Glass peas are kneaded into rubber.

<Problems to be Solved by the Invention> However, with the above H treatment method, for example, those treated with electrostatic flocking have low wear resistance, and those coated with a low friction agent by spraying have a film thickness of around 20μ. The problem is that they are small, lack stability, and the beads kneaded into rubber are hard and can scratch the windshield.

As shown above, conventional surface treatment methods have various problems, and there is a need for a surface treatment method to create a glass run that has high lubricity at the bottom 1b, excellent wear resistance, and is highly flexible. It is being

An object of the present invention is to provide a method for surface treatment of a glass run for an automobile that solves the above-mentioned problems.

Means for Solving the Problems> This will be explained with reference to Figures 1 and 2. In order to achieve the above object, the surface treatment method of a glass run for an automobile according to the present invention combines a pair of side walls 1a, 1a and a bottom 1b in a U-shaped cross section, and also connects a pair of side walls 1a, 1a and a bottom 1b in a U-shaped cross section, and In a surface treatment method for a glass run for an automobile, which is formed by bonding seal lips 1c and 1c extending toward the center line, a self-lubricating foam such as high molecular weight polyethylene or fluororesin is cut in advance to a predetermined thickness and width. to create a foam sheet 2, applying the foam sheet 2 to the bottom part 1b of the rubber glass run main body l via a rubber adhesive 2a,
After integrally extruding with the glass run body 1,
It consists of performing a vulcanization treatment.

Effect> The glass run surface-treated by applying the present invention is formed by cutting the foam sheet 2 to the desired thickness and width in advance,
It is bonded to the bottom part 1b of the glass run main body 1, has a sufficiently low coefficient of friction, allows the window glass 4 to be moved up and down without resistance, has high abrasion resistance, and is highly durable.

<Example> An example will be described with reference to the drawings. Reference numeral 1 is a glass run manufactured by extrusion molding rubber, in which a pair of side walls 1a, 1a and a bottom part 1b are joined to have a U-shaped cross section. Seal lips 1c, 1c extending toward the center line are connected to the tips of the opening side walls 1a, 1a. 2 is a foam sheet, which is made by cutting a lubricating foam such as high molecular weight polyethylene or fluororesin to a predetermined thickness and width, and then cutting the sheet together with the glass run main body l via a rubber adhesive 2a. Place it on the bottom 1b of the glass run body 1,
After integrally extrusion molding, a vulcanization treatment is performed to completely integrate it with the glass run main body 1.

Note that 3, 3 is the seal lip 1c, a low-friction coating film formed on the surface of 1c, 4 is a window glass, and 5 is a door.

Next, the effect will be explained. The window glass 4 is the first
The seal lip 1c moves up and down in the direction perpendicular to the paper surface of the figure.
The low-friction side coatings 3, 3 formed on 1c and the 2 sides of the foam sheet adhered to the bottom 1b are slid. In particular, the foam sheet 2, which is subjected to a large force when the window glass slides, must have a sufficiently low coefficient of friction so that the window glass 4 can move up and down without resistance, and must have high durability to extend its life. It is necessary to provide abrasion resistance, but in the present invention, the foam sheet 2 is pre-cut to a desired thickness and width, and is adhered to the bottom part 1b of the glass run body l, which is sufficient to meet the above requirements. He will respond.

Furthermore, even if the foam is worn out, the apertures of the foam are always in point contact with the window glass 4, so a low sliding resistance is always maintained, and less heat is generated and wear is reduced accordingly. In addition, the foam sheet 2 is flexible and will not damage the window glass 4.

In addition, if the size of the bubbles in the foam is approximately 300μ or less and the porosity is 10~40%, it will not break or break even if it is bent.
It does not cause wrinkles and is most suitable.

<Effects of the Invention> Since the present invention is configured as described above, the foam sheet 2 is formed by cutting in advance to a desired thickness and width, and is bonded to the bottom portion 1b of the glass run body 1. The friction coefficient is sufficiently low, the window glass 4 can be moved up and down without resistance, and it has high abrasion resistance and high durability.

Furthermore, even if it wears out, the apertures in the foam are always in point contact with the window glass 4, so low sliding resistance is always maintained, resulting in less heat generation and less wear. . In addition, the foam sheet 2 is flexible and will not damage the window glass 4.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along the line AA in FIG. 2 showing an embodiment of the glass run according to the present invention, and FIG. 2 is a front view of the door. FIG. 3 is a sectional view taken along the line AA in FIG. 2, showing a conventional example. l Glass run body 1a Side wall 1b Bottom lc Seal lip 2 Foam sheet 2a Adhesive 3 Low-friction coating 4 Windshield 5 Door patent Applicant Agent Nishikawa Rubber Industries Co., Ltd.
Person Patent Attorney Furu 1) Kei Tsuyoshi Figure 1

Claims (1)

[Claims] [1] A pair of side walls (1a, 1a) and a bottom part (1b) are connected in a U-shaped cross section, and the open side walls (1a, 1a)
Seal lips (1c) extending toward the center line on both sides of the tip
, 1c), a self-lubricating foam such as high molecular weight polyethylene or fluororesin is cut in advance to a predetermined thickness and width.
creating a foam sheet (2), applying said foam sheet (2) to the bottom (1b) of the rubber glass run body (1) via a rubber adhesive, and integrally forming the foam sheet (2) with the glass run body (1); A surface treatment method for automotive glass runs that involves extrusion molding and then vulcanization.