JPH0596660A - Glass run manufacturing method - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a glass run in which a molding part is connected and molded to the extrusion molding parts 410 and 420.
Glass sliding members 418, 42 heat-welded to 0, 420
A method for manufacturing a glass run in which No. 8 is not peeled off by heat during molding is provided. [Structure] In the manufacture of glass runs, the glass sliding member 4 is used.
The extruded molding part 410 in which 18 is heat-welded is installed in a molding die 701, and a base material for the molding part is injected and vulcanized to be molded. Before the injection, the glass sliding member 41 is used.
The rivet member 41 is attached to the base of the extrusion-molded portion 410 at the end of No.
Fix at 9. Therefore, during vulcanization, the extrusion molding unit 410
Even if the glass sliding member 418 tries to separate from the base body of the extrusion molding unit 410 when the temperature of the end portion of the glass is higher than the temperature at which it is heat-welded, the glass sliding member 418 is fixed to the extrusion molding unit via the rivet member 419. Therefore, the end of the glass sliding member does not come off from the extruded part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a glass run in which a glass sliding member is heat-welded to a sliding portion for windshield.

[0002]

2. Description of the Related Art As an example of a conventional glass run, there is one which is attached to a window frame of a door of an automobile body and has a solid rubber base having a groove for sliding a windshield. In the groove of the base body, there is a sliding portion where the end portion of the wind glass slides. A glass sliding member is heat-welded to the sliding portion to reduce sliding resistance.

By the way, in the glass run, a plurality of extruded parts having different cross-sectional shapes are extruded so as to conform to the function of each position of the window frame, and then these extruded parts are connected by die forming. It is integrated and attached to the window frame of the door.

[0004]

However, when the glass sliding member is heat-welded to the substrate of the extrusion-molded portion with the heat-welding film interposed, and then the die-molding is performed, the temperature at the time of vulcanization of the die-molding is reduced. Since the temperature is higher than the welding temperature of the film, there is a problem that the glass sliding member is peeled off from the substrate at the end of the substrate set in the mold.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a method for producing a glass run in which a glass sliding member heat-welded to an extrusion molding portion does not come off during vulcanization during molding. The purpose is to do.

[0006]

DISCLOSURE OF THE INVENTION The present invention, which has been made to solve the above problems, forms a base having a sliding portion that slides on an end face of a wind glass, and heat-welds a glass sliding member to the base. In the method for producing a glass run described above, a substrate of an extrusion molding portion is formed by extrusion molding, a glass sliding member is heat-welded to a sliding portion of the substrate, and an end portion of the substrate is placed in a molding die. The mold is closed, a cavity is formed in the mold, and the base molding material is injected into the cavity and vulcanized to connect the base of the mold molding part to the end of the base of the extrusion molding part by molding. In the manufacturing method described above, the glass sliding member is fixed to the base with a rivet member at the end of the base of the extrusion-molded portion before the injection of the base molding material.

[0007]

The glass run of the present invention comprises an extrusion molding section and a molding section connected to this extrusion molding section. In order to manufacture this glass run, the extrusion molding part is extrusion-molded, and the glass sliding member is heat-welded to the sliding part of the window glass of this extrusion molding part. After that, the end of the extrusion molding section is installed in the molding die, the molding die is closed, and the base molding material is injected into the cavity formed by the molding die surface and the end of the extrusion molding section to form the molding section. Mold the connection.

In the above manufacturing process, the end portion of the glass sliding member is fixed to the base body of the extrusion molding section with a rivet member before the base molding material is injected into the cavity. Therefore,
When the extrusion molding part was installed in the mold and the base molding material was injected into the cavity and vulcanized, the temperature at the end of the extrusion molding part became higher than the temperature at which it was heat-welded, and the glass sliding member was extruded. Even if it is peeled from the base of the molding part, it is mechanically fixed to the base by a rivet member. Therefore, the end portion of the glass sliding member is not peeled off from the base body of the extrusion molded portion.

[0009]

Preferred embodiments of the present invention will be described below in order to further clarify the constitution and operation of the present invention described above. As shown in FIG. 1, the glass run 401 is attached to the peripheral portion of the window frame of the door 405 of the automobile body 403 to enhance the slidability with the window glass 407 and to secure the sealing property. Glass run 401
First to fourth extrusion molding parts 4 having different cross sections
10, 420, 430, 440, the first extruding section 410 and the second extruding section 420 are connected by a first die forming section 510, and the second extruding section 4 is provided.
20 and the third extrusion molding section 430 are connected by the second molding section 520, and the third extrusion molding section 430 and the fourth extrusion molding section 440 are connected by the third molding section 530. Connected and configured.

Of the glass run 401, the first extruded part 410 and the second extruded part 420, and the first die-molding part 510 for connecting the first extruded part 410 and the second extruded part 420 will be described as a representative, and the other parts are almost the same. Since it is manufactured with the same configuration and process,
The description is omitted.

The first extruded part 410 is shown in FIGS.
As shown in FIG. 7, a rubber base 413 integrally formed with the lip portion 411 is provided, and a groove 414 for sliding the window glass 407 is formed by the rubber base 413. A glass sliding member 418 is heat-welded via a laminated film 417 to the base portion 415 of the rubber base 413, that is, the sliding portion of the window glass 407 at the bottom of the groove 414. The end of the glass sliding member 418 is fixed to the rubber base 413 by a rivet member 419.

As shown in FIG. 4, the second extrusion-molded portion 420 has a mounting base 422 in which the insert member 421 is embedded and a rubber base 423 integrally formed with the mounting base 422. ing. A glass sliding member 428 is heat-welded to the sliding portion of the window glass 407 on the base portion 425 of the rubber base 423 via the laminated film 427. The end of the glass sliding member 428 is fixed to the rubber base 423 by a rivet member 429.

As shown in FIG. 5, the first die-molding section 510 has a rubber base 413 of the first extrusion-molding section 410 and a second base.
Mounting base 422 of the extruded part 420 and rubber base 42
3 has a rubber base 513 for connecting to.

Next, of the glass run 401, a method of manufacturing the first extruded portion 410 will be briefly described. First, the rubber base 413 is extrusion-molded. For extrusion molding, an extruder is used and an EPDM rubber material is extruded to form an extrusion molded body. The extrusion speed at this time is
Set to 3 m / min. EPDM rubber is ethylene, α-
To the olefin (eg propylene), as the third component,
Ethylidene nobornene, dicyclopentadiene, 1,4
-A small amount of a non-conjugated diene such as hexadiene is added and copolymerized to introduce a double bond into the side chain so that sulfur vulcanization is possible. This EPDM rubber is usually blended with auxiliary materials such as a reinforcing filler (carbon black or white filler), a plasticizer, a lubricant and a vulcanizing agent.

Next, the rubber substrate 413 is vulcanized. This step is carried out by passing the extruded product through a microwave heating device (UHF) mainly for heating and a hot air vulcanizing device (HAV) mainly for heat retention. As the vulcanization condition at this time, 180 ° C. × 15 minutes is adopted. Then, a heat welding process is performed. That is, the laminated film 41
Glass-sliding member 418 made of polyester with 7 bonded
Is fed from the roller, and in the residual heat state immediately after vulcanization,
The surface of the rubber substrate 413 is pressure-bonded by a pressure-bonding roller, and the glass sliding member 418 is heat-welded.

The laminated film 417 has a rubber base 41.
3, a glass sliding member 418 is heat-welded to the glass substrate 3, and a first base film 413 made of EPDM rubber and having good adhesiveness, and a glass sliding member 4 made of polyester.
18 and a second film having good adhesiveness are laminated. For example, as the first film, a material obtained by introducing a polar functional group into a nonpolar olefin resin (Admer (Mitsui Petrochemical Industry Co., Ltd .: trade name) is used,
As the second film, a copolyester resin material (Chemit R-248 (manufactured by Toray Industries, Inc .: trade name) is used and coextruded to form a film having a thickness of 50 μm and 30 μm, respectively. The first film of the laminated film 417 is arranged on the rubber base 423 side, and the glass sliding member 418 has adhesiveness with the second film.
It is also a material having excellent slidability, and is formed of, for example, a cloth such as polyester or a resin sheet material such as PVC.
Then, the formed body is cooled and further cut with a cutter. After that, the end of the glass sliding member 418 is fixed to the rubber base 413 with a rivet member 419. That is, a rivet driving machine is used to drive the rivet member 419 through the glass sliding member 418 at the end of the rubber base 413. The head of the rivet member 419 may be heat caulked by the heat of the rivet driving machine before the molding.
As a result, the first extrusion molding portion 41 of the glass run 401 is
0 is completed.

On the other hand, the second extrusion-molding section 420 is the same as the above-mentioned first extrusion-molding section 410 except that the insert member 421 and the rubber material are simultaneously extrusion-molded and embedded.
The same process as the molding method of.

Subsequently, the first mold forming section 510 is manufactured. First, as shown in FIG. 6, the first extrusion molding unit 410
And the second extrusion molding section 420 is installed in the molding die 701. The molding die 701 is formed of an upper die 703, a lower die 705, and the like. Subsequently, the molding die 701 is heated to 160 ° C. to 180 ° C. for the subsequent vulcanization. At this time,
The heads and tips of the rivet members 419 and 429 are caulked by the heat of the molding die 701, and the glass sliding member 41.
8, 428 are fixed to the rubber bases 413, 423, respectively. Then, the cavity 7 formed in the molding die 701.
Inject EPDM rubber material into 07. And the molding die 7
The rubber material is vulcanized by the heat of 01 to become the rubber base 513, and at the same time, the rubber base 413 of the first extrusion molding unit 410 is vulcanized.
And the rubber base 423 of the second extruded part 420.

In the above molding, the rubber substrates 413, 4
The glass sliding members 418 and 428 are heat-welded to 23, but the end portions of the glass sliding members 418 and 428 have rubber bases 413 and 4 before the rubber material is injected.
It is fixed to 23 by rivet members 419 and 429. Therefore, when the rubber bases 413 and 423 are installed in the molding die 701 and the rubber material is injected into the cavity, the temperature of the end portions of the rubber bases 413 and 423 becomes higher than the temperature of the heat-welding, and the laminated film 417, 427
Even if an attempt is made to separate from the rubber substrate 2 at the end portion of the rivet members 419 and 42,
The ends of the glass sliding members 418 and 428 are not separated from the rubber bases 413 and 423, because they are fixed to the rubber bases 413 and 423 via the spacer 9. Therefore, it is possible to achieve smooth sliding of the window glass 407 in the peripheral portion of the first mold forming portion 510.

The rivet member 4 according to the above embodiment
Fixing with 19, 429 is performed by riveting and then caulking the heads and tips of the rivet members 419, 429 with heat of the molding die 701, but the invention is not limited to this. Prior to installation, a rivet fastening machine may perform riveting and caulking at the same time, and in any case, if the rivet member is used to fix the rubber material before injecting it into the mold cavity, It is possible to prevent peeling of the glass sliding member due to heat.

Further, in the above embodiment, the material for the rivet member is a resin suitable for heat staking, such as PP or PE.
Although it is formed of T or the like, the invention is not limited to this, and a metal rivet member may be used. In this case, the rivet head and the tip are crushed to be caulked. When a metal rivet member is used, it is desirable to make the surface of the rivet member a smooth surface or to carry out a polishing treatment or the like in order to make sliding with the wind glass smooth.

Further, the shape of the rivet member is not limited to a general-purpose round rivet member or a flat rivet member, and a U-shaped rivet member 419A as shown in FIG. 7 may be used. In the case of the U-shaped rivet member 419A, since the glass sliding member 418 is fixed to the rubber base 413 in a wide area, the effect of preventing the glass sliding member 418 from peeling can be further enhanced.

[0023]

As described above, according to the present invention, in a glass run having an extruded portion in which a glass sliding member is heat-welded to a sliding portion of a substrate, an end portion of the glass sliding member is extruded. After fixing it to the base of the part with rivet members,
A mold forming part is connected and formed by mold forming at the end of this extrusion forming part. Therefore, even if the glass sliding member is peeled from the base due to heat during molding, the end of the glass sliding member is firmly held by the base via the rivet member. Therefore, there is no peeling portion at the end of the glass sliding member, and the smooth slidability of the glass run can be ensured.

[Brief description of drawings]

FIG. 1 is an explanatory view for explaining the periphery of a door to which a glass run is attached.

FIG. 2 is a perspective view showing an end portion of a first extrusion-molded portion of the glass run of the embodiment.

FIG. 3 is a cross-sectional view showing an end portion of a first extrusion-molded portion of the glass run of the example.

FIG. 4 is a perspective view showing a second extrusion molding portion of a glass run.

FIG. 5 is a perspective view showing the periphery of the first mold forming portion of the glass run.

FIG. 6 is an explanatory view for explaining mold forming of the same embodiment.

FIG. 7 is a cross-sectional view showing an extrusion molding portion of a glass run according to another embodiment.

[Explanation of symbols]

 418,428 glass sliding member 419,419A, 429 rivet member 401 glass run 403 automobile body 405 door 407 wind glass 410 first extrusion molding part 413,423,513 rubber substrate 414 groove 415 base 417 laminated film 418,428 Glass sliding member 419, 419A, 429 Rivet member 420 Second extrusion molding part 510 First mold molding part 701 Mold 707 Cavity

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B29L 31:58 4F

Claims (1)

[Claims] 1. A method for producing a glass run in which a substrate having a sliding portion that slides on an end face of wind glass is formed, and a glass sliding member is heat-welded to the substrate, the method comprising the steps of: A base body is formed, a glass sliding member is heat-welded to a sliding portion of the base body, an end portion of the base body is installed in a molding die, the molding die is closed, and a cavity is formed in the molding die. In a manufacturing method in which a molding material is injected and vulcanized to connect and mold a substrate of a mold molding portion by molding at the end of the base of the extrusion molding portion, before the injection of the substrate molding material, the extrusion molding is performed. A method for manufacturing a glass run, characterized in that a glass sliding member is fixed to a base body by a rivet member at an end portion of the base body of a molding section.