JPH05305813A - Surface treatment method for glass run - Google Patents

Abstract

PURPOSE:To shorten the time required for surface treatment process without lowering of the basic performance of sealing ability or the like. CONSTITUTION:The surface treatment method is provided for forming a flocked area 8 on the inner base 5a of a main body 5 of a glass run 4 and forming a lubricant layer 11 on the surface of a lip part 6 of the glass run 4. The surface treatment method comprises an adhesive coating process, a flocking process, an adhesive hardening process and a melting process. In the adhesive coating process, an adhesive is applied to the inner base 5a of the main body part 5 and the surface of the lip part 6. In the flocking process, many piles are electrostatically planed in the areas where the adhesive is applied. In the adhesive hardening process, the adhesive is hardened. Whereupon, the flocked part 8 is formed in the inner base 5a of the main body part 5. In the melting process, a heat roller is pressed to the piles on the lip part 6. Whereupon, the piles are heat-molten to form a lubricant layer 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment method for forming a flocked portion and a lubricant layer on a glass run mounted on a door of an automobile, for example.

[0002]

2. Description of the Related Art Conventionally, as a glass run to be mounted on a door frame of an automobile door, for example, the actual open window 62-16.
There is one disclosed in Japanese Patent No. 1012. As shown in FIG. 8, the glass run 31 includes a main body portion 32 and a pair of lip portions 33, which are made of PVC (vinyl chloride resin),
It is formed of EPDM or the like. The main body 32 has a U-shaped cross section, and is fitted into a door frame 34 which also has a U-shaped cross section. Both lip portions 33 extend inward from the open end (the left end in FIG. 8) of the main body portion 32 toward the bottom surface thereof, and the door glass 35 in the door frame 34 is provided.
Is elastically sandwiched.

Main body 32 with which the door glass 35 is in sliding contact
The flocked part 36 is attached to the inner bottom surface 32a of the
Are formed. The flocked portion 36 is provided on the door glass 35.
In order to reduce the sliding resistance when moving up and down, and to prevent the inner bottom surface 32a from being worn by muddy water.

A coating layer 3 made of a slippery coating is formed on a portion of the both lip portions 33 which comes into contact with the door glass 35.
7 are formed. This coating layer 37 is used for the door glass 3
5 is to reduce sliding resistance between the lip portion 33 and the lip portion 33, and to prevent rainwater and wind from entering to ensure sealing performance.

The flocked portion 36 and the coating layer 37 of the glass run 31 are obtained by applying a surface treatment consisting of five steps as shown in FIG. The five steps here are an adhesive application step S11 of applying a thermosetting adhesive to the inner bottom surface 32a of the main body 32, and a flocking step S12 of applying electrostatic flocking to the location where the adhesive is applied. An adhesive curing step S13 of heating and curing the adhesive, a coating application step S14 of applying a lubricant coating to the lip portion 33, and a coating curing step S15 of heating and curing the applied coating. Then, the adhesive layer 38 and the flocked portion 36 are formed after the completion of the adhesive curing step S13, and the coating layer 37 is formed after the completion of the coating curing step S15.

[0006]

However, in the above-mentioned conventional surface treatment method, for example, one step is required in the adhesive applying step S11.
0 seconds, 10 seconds for flocking step S12, adhesive curing step S13
3 minutes, paint application step S14 10 seconds, paint curing step S
It takes 15 minutes to 3 minutes. As is clear by comparing the time required for each step, the adhesive application step S11 and the flocking step S1
2. While the time required for the coating material application step S14 is as short as 10 seconds, the time required for the adhesive agent curing step S13 and the coating material curing step S15 is as long as 3 minutes. Therefore,
The ratio of both curing steps S13 and S15 is extremely large in the entire processing time, and the time required for the surface processing is generally lengthened due to these.

In the above five steps, the heat curing of the adhesive and the heat curing of the slip coating are not performed simultaneously but separately, for the following reason. That is, coating with a roller or coating with a spray is generally used to apply the slip coating. Of these, if coating is performed using a roller before the adhesive is cured, there is a problem that the pile on the adhesive is scraped off. In addition, if spray coating is performed before the adhesive is cured, the pile on the adhesive may be scattered. Therefore, in order to avoid these problems, the heat curing of the adhesive and the heat curing of the slip coating have to be performed separately.

The present invention has been made to solve the above problems, and an object thereof is to reduce the time required for the surface treatment step without lowering the basic performance such as sealing property. It is to provide a surface treatment method for glass run.

[0009]

In order to solve the above problems, the present invention is a surface treatment method for a glass run in which flocking is applied to a sliding contact portion with a door glass. An adhesive applying step of applying an adhesive to the surface of the main body portion and the lip portion, which is a part, a flocking step of flocking a large number of piles at a location where the adhesive is applied, and curing the adhesive, An adhesive curing step of fixing the multiple piles to the surfaces of the main body portion and the lip portion, and a melting step of melting the piles by pressing a heating body against the piles on the lip portion to form a lubricant layer. Is equipped with.

[0010]

The following four steps are carried out during the surface treatment of the glass run. First, in the adhesive applying step, the adhesive is applied to the surfaces of the main body portion and the lip portion. In the next flocking step, a large number of piles are flocked on the part where the adhesive is applied, that is, on the surfaces of the main body and the lip. further,
The adhesive is cured in the adhesive curing step. By the hardening of the adhesive, the pile is fixed so as not to fall off, and the flocked portion is formed in the main body. Then, in the melting step, the heating body is pressed against the pile on the lip portion to melt the pile. By the melting of the pile, a lubricant layer is formed on the lip portion via the cured adhesive. In this way, a glass run having a flocked portion and a lubricant layer is obtained.

In the above-mentioned surface treatment method, the adhesive applying step and the flocking step correspond to the adhesive applying step, the flocking step and the paint applying step of the prior art. Moreover, the adhesive curing step of the present invention corresponds to the adhesive curing step and the coating curing step of the conventional technique. Therefore, the curing step, which takes up most of the time required for the entire surface treatment, is reduced from two to one. By reducing the curing step, it becomes possible to shorten the time required for the surface treatment.

[0012]

EXAMPLE An example in which the present invention is embodied in a surface treatment method for a glass run for an automobile will be described below with reference to FIGS.

First, the glass run obtained by the surface treatment method of this embodiment will be described. This glass run is mounted on a door 1 of an automobile as shown in FIG. The door 1 has a door frame 2 in the upper part thereof, and a door glass 3 is provided in the door frame 2 so as to be able to move up and down. As shown in FIG. 1, the door frame 2 has a U-shaped cross section, and a glass run 4 is mounted in the door frame 2.

The glass run 4 has a main body 5 and a pair of lip portions 6. The main body portion 5 and both lip portions 6 are integrally formed of PVC (vinyl chloride resin). The main body portion 5 is formed in a U-shaped cross section so as to be fitted into the door frame 2. Further, both lip portions 6 extend inward from the open end (the left end in FIG. 1) of the main body portion 5 toward the inner bottom surface 5a so as to have a substantially symmetrical shape with the door glass 3 as a center. 3 is elastically clamped.

An adhesive layer 7 is formed on the inner bottom surface 5a of the main body 5 with which the door glass 3 is in sliding contact, and a flocked portion 8 is provided on the adhesive layer 7. The flocked portion 8 is formed by electrostatically flocking a large number of piles 9 on the adhesive layer 7. In this embodiment, as the pile 9,
Polyamide fibers having a length of about 0.5 mm to 0.8 mm and a thickness of 1.5 denier to 3 denier are used. The flocked portion 8 is for reducing sliding resistance when the door glass 3 is in sliding contact and for preventing the inner bottom surface 5a of the main body 5 from being worn by muddy water or the like.

An adhesive layer 10 is formed on a portion of the both lip portions 6 that comes into contact with the door glass 3, and a lubricant layer 11 is formed on the adhesive layer 10. Lubricant layer 11
Is for reducing the sliding resistance between the door glass 3 and the lip portion 6 and for preventing the entry of rainwater or wind to ensure the sealing property. The lubricant layer 11 is formed by implanting a large number of piles 9 on the adhesive layer 10 and then heating and melting the piles 9 (see FIG. 6). The material, shape, and the like of the pile 9 are the same as those of the pile 9 of the flocked portion 8 described above.

Next, a surface treatment method for forming the above-mentioned flocked portion 8 and lubricant layer 11 will be described. This surface treatment method includes four steps as shown in FIG. 2, that is, an adhesive application step S1, a flocking step S2, an adhesive curing step S3, and a melting step S4. Then, as shown in FIG. 4, the intermediate product 12 before surface treatment, which is composed only of the main body portion 5 and both lip portions 6, is sequentially sent to each of the steps S1 to S4, and the following treatment is performed.

First, when the intermediate product 12 is sent to the adhesive applying step S1, as shown in FIG.
The heat-curable adhesive 1 with rollers or the like is attached to the inner bottom surface 5a of the main body portion 5 and the surfaces of both lip portions 6 in FIG.
3 is applied. The intermediate product 12 to which the adhesive 13 is applied is conveyed to the next flocking step S2.

In the flocking step S2, a large number of piles 9 are supplied from the pile supply source to the places where the adhesive 13 is applied.
Is dropped. At this time, a voltage is applied between the adhesive 13 and the pile supply source. Then, as shown in FIG. 6, a large number of piles 9 that have fallen are electrostatically planted on the adhesive 13 at the three locations on the inner bottom surface 5a of the main body portion 5 and both lip portions 6.
At this time, the adhesive 13 has not yet hardened and has a viscosity. Then, the intermediate product 12 in which the pile 9 is flocked is conveyed to the next adhesive curing step S3.

In the adhesive curing step S3, the adhesives 13 at the three locations are cured at the same time by heating. Then, as shown in FIG. 7, the adhesive layer 7 is formed on the inner bottom surface 5a of the main body 5, and the pile 9 is fixed on the adhesive layer 7 so as not to fall off. The piles 9 form the flocked portion 8. Similarly, the adhesive layer 10 is formed on both lip portions 6, and the pile 9 is fixed on the adhesive layer 10 so as not to fall off.
Intermediate product 1 on which adhesive layers 7 and 10 and flocked portion 8 are formed
2 is conveyed to the next melting step S4.

In the melting step S4, the intermediate product 12 is conveyed by the rotation of the feed roller 14, and is pressed from above by the heat roller 15 as a heating body.
The heat roller 15 is preheated to 250 ° C. or higher. By the pressing of the heat roller 15, both lip portions 6
The upper pile 9 is heated while being pushed down. As a result, the pile 9 is melted by heat, and the lubricant layer 11 made of polyamide resin as shown in FIG. 1 is formed on the adhesive layer 10.

In this way, the inner bottom surface 5 of the intermediate product 12
The flocked portion 8 is formed on a and the lubricant layer 11 is formed on both lip portions 6. The time required for the surface treatment is, for example, 10 seconds in the adhesive application step S1 and the flocking step S
2 for 10 seconds, adhesive curing step S3 for 3 minutes, melting step S4
Is 10 seconds.

In the surface treatment of the present embodiment described above, the adhesive applying step S1 and the flocking step S2 are the conventional adhesive applying step S11, the flocking step S12 and the paint applying step S14.
Equivalent to. In addition, the adhesive curing step S3 of this embodiment is
Prior art adhesive curing step S13 and paint curing step S1
Equivalent to 5. That is, the adhesive application step S in this embodiment
If the flocking step S2 and the adhesive curing step S3 are performed, S11 to S15 will be performed for almost all the steps of the conventional technique. This is because the adhesive layer 7 and the hair-implanted portion 8 are formed on the inner bottom surface 5a of the main body portion 5, and at the same time, the similar adhesive layer 10 is formed on the lip portion 6 and the pile 9 is also implanted. Is.

Therefore, the number of curing steps, which takes up most of the time required for the entire surface treatment, is reduced from two to one. Due to the reduction of the curing step, the time required for the surface treatment can be significantly shortened.

In the glass run 4 surface-treated as described above, when the door glass 3 moves up and down, the end surface of the glass run 4 slides against the flocked portion 8 of the glass run 4. At this time, muddy water and the like adhering to the end face is removed by the flocked portion 8. Therefore, abrasion of the inner bottom surface 5a of the glass run 4 due to muddy water or the like is prevented by the flocked portion 8.

When the door glass 3 is moved up and down, its inner and outer surfaces are brought into sliding contact with both lip portions 6 of the glass run 4. At this time, both inner and outer surfaces of the door glass 3 are elastically sandwiched by the lip portions 6. Moreover, the lubricant layer 11 made of polyamide resin is provided on the lip portion 6. Since this polyamide resin originally has a low coefficient of friction, it exhibits lubricity. Therefore, the lubricant layer 11 reduces the sliding resistance between the door glass 3 and the lip portion 6, and also reliably seals the door glass 3 and the door frame 2. The seal blocks wind noise when the vehicle is running and prevents rainwater and the like from entering the vehicle.

The present invention is not limited to the above-described embodiments, and can be implemented as follows with a part of the configuration appropriately changed without departing from the spirit of the invention. (1) PV main body 5 and lip 6 of the glass run 4
EPDM (ethylene / propylene copolymer) instead of C
It may be formed by.

(2) A pile made of polyethylene may be used as the pile 9 constituting the flocked portion 8 and the lubricant layer 11. (3) In the above embodiment, the glass run having a substantially U-shaped cross section is taken as an example, but the glass run may have a substantially F-shaped cross section including a lip portion provided on the door belt line and a hollow seal portion. .. In this case, the lubricant layer may be provided on the sliding surface of the lip portion, and the flocked portion may be provided on the sliding surface of the hollow seal portion.

[0029]

As described above in detail, according to the present invention, the excellent effect that the time required for the surface treatment step can be shortened without deteriorating the basic performance such as the sealing property.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 3, showing a glass run subjected to surface treatment according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing a surface treatment process of a glass run in one example.

FIG. 3 is a side view of an automobile door according to an embodiment.

FIG. 4 is a cross-sectional view showing an intermediate product of a glass run before the surface treatment of one example.

5 is a cross-sectional view showing a state in which an adhesive is applied to the intermediate product of FIG.

FIG. 6 is a cross-sectional view showing a state in which piles are implanted on the adhesive of FIG.

FIG. 7 is a diagram schematically showing a melting process of an example.

FIG. 8 is a cross-sectional view of a conventional glass run.

FIG. 9 is a diagram schematically showing a surface treatment process of a conventional glass run.

[Explanation of symbols]

4 ... Glass run, 5 ... Main body part, 5a ... Inner bottom surface, 6 ... Lip part, 8 ... Flocked part, 9 ... Pile, 11 ... Lubricant layer, 13 ...
Adhesive, 15 ... Heat roller as heating element

Claims (1)

[Claims] 1. A method of surface-treating a glass run in which flocking is applied to a sliding contact portion with a door glass, the surface of a main body portion (5) and a lip portion (6) being sliding contact portions with a door glass. An adhesive applying step of applying an adhesive (13) to the hair, a flocking step of flocking a large number of piles (9) at the location where the adhesive (13) is applied, and a curing of the adhesive (13) Then, an adhesive curing step of fixing the plurality of piles (9) to the surfaces of the main body part (5) and the lip part (6), and a heating body (15) on the pile (9) on the lip part (6). )
And a melting step of melting the pile (9) by pressing to form the lubricant layer (11).