JP2002067077A - Molding method of composite component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding method of a composite component which enables molding of the composite component of regular dimensions without positioning strictly a member having an insert member inside. SOLUTION: Forming molds 44 and 46 integrated in a state wherein a prescribed space is kept beforehand by a spacing implement 48 are prepared. The respective fronting end parts of extruded parts 38a and 38c for a glass run and of an extruded part 41 for an inner weather strip are set in a cavity 45 of the mold 44. The respective fronting end parts of extruded parts 38d and 38e for the glass run and of the extruded part 41 for the inner weather strip are set in a cavity 47 of the mold 46. In this state, an unvulcanized rubber is injected into the cavities 45 and 47 and vulcanized in the molds 44 and 46 so that the glass run 33 and the inner weather strip 35 are integrated together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a composite part having a molded part between a plurality of members, for example, a sealing part for a vehicle to be mounted in an opening of a vehicle.

[0002]

2. Description of the Related Art Sealing parts mounted on an opening of a vehicle of this kind, for example, a window frame of a door, include:
There are glass runs, outer weather strips, inner weather strips, and the like.

[0003] Here, the glass runs are disposed along the horizontal side of the upper edge of the window frame and the front and rear vertical sides. The outer weather strip and the inner weather strip are disposed outside and inside the window glass, respectively, along the belt line at the upper edge of the door panel. The outer weather strip and the inner weather strip are mounted so as to extend in a direction substantially perpendicular to the direction in which the slidingly guided window glass moves up and down. For this reason, an insert member such as a sheet metal is embedded in the outer weather strip and the inner weather strip for shape retention and mounting stability. These seal components allow the window glass to be slid and guided to open and close, and prevent water, dust, noise, and the like from entering the vehicle interior from outside the vehicle compartment.

However, in this conventional window glass sealing configuration, the glass run and the inner weather strip are formed as separate parts, and the glass run is merely in contact with both ends of the inner weather strip. For this reason, if the manufacturing tolerance and the assembly tolerance of the two seal parts are concentrated on the contact portion, a gap may be generated in the contact portion. When such a gap exists, there is a problem that the seal is broken at the contact portion, and dust and noise outside the vehicle compartment enter the vehicle compartment through the gap.

To cope with such a problem, for example, a weather strip 101 as shown in FIG. 8 has been proposed. In this weather strip 101, a glass run 102 disposed on an inner peripheral edge of a window frame is connected to an inner weather strip 103 disposed on a door belt line portion at an intermediate portion of a vertical side portion thereof.
More specifically, both ends of the inner weather strip 103 are integrally connected to the glass run 102 via the molded part 104.

[0006] In forming the weather strip 101, for example, the following forming method is employed. That is, as shown in FIG. 8, a plurality of extruded portions 102a to 102e which are extruded into a predetermined cross-sectional shape and then cut into a predetermined length are prepared as the glass run 102. Further, as the inner weather strip 103, an extruded portion 103a that is separately extruded into a predetermined cross-sectional shape and then cut into a predetermined length is prepared.

In the first molding step, the opposite end portions of the extruded portions 102a and 102b for the adjacent glass run 102 are each formed of a plurality of mold members, and a predetermined pair of upper and lower molding dies are formed as a whole. Set to position. In this state, for example, rubber in an unvulcanized state is injected into the cavities in both dies, and vulcanized in the dies. This allows
The first extruded portions 102a and 102b
A corner molding 110a is formed and their opposing ends are connected together. Similarly, the extruded portions 102b, 10
A second corner molding 110b is formed between the opposing ends of 2d, and the opposing ends are connected to each other.

Next, in the second molding step, FIGS.
As shown in FIG.
a, 102c and the opposite end of the extruded portion 103a for the inner weather strip 103, respectively.
11 and 112 are set at predetermined positions. In this state, unvulcanized rubber is injected into the cavities 113 in the dies 111 and 112 and vulcanized in the dies 111 and 112.
Thereby, the extruded parts 102a, 102c, 103a
Forming a first connection mold part 104a between the opposed ends of
The opposite ends are connected to each other. Then, similarly,
Extrusion sections 102d and 102e for glass run 102 and extrusion section 103 for inner weather strip 103
A second connection-type molded portion 104b is formed between the opposed ends of a, and the opposed ends are connected to each other.

As described above, the molded parts 104a, 104b, 110a and 110b are connected in order between the opposite ends of the extruded parts 102a to 102e for the plurality of glass runs 102 and the extruded part 103a for the inner weather strip 103. Mold. As a result, the weather strip 101 in which the front and substantially inverted U-shaped glass runs 102 and the inner weather strip 103 arranged at a substantially intermediate position between both longitudinal sides of the glass run 102 are integrally connected is formed. Molded.

[0010]

However, in the method for forming the weather strip 101, the opposite ends of the extruded portions 102a to 102e, 103a are placed on the molding surfaces 111, 112 with respect to the molding dies 111, 112. Is formed by positioning in accordance with the marking line formed on the substrate. For this reason, at the time of molding each of the molded parts 110a and 110b,
The extruded portions 102a, 102d, and 103a tended to be displaced at opposite ends. As a result, in the molded weather strip 101, each molded part 1
Each of the extruded portions 102a, 10a in 10a, 110b
There is a problem that an error easily occurs in the relative positions of 2c, 102d, 102e, and 103a.

Each of the extrusion parts 102a, 102
When the error in the relative positions of c, 102d, 102e, and 103a increases, the extruded portions 102a, 102c, 102d, and 102e on the glass run 102 become slack or dragged when the weather strip 101 is mounted on the window frame. Sometimes. Then, there is a problem that the appearance around the glass run 102 deteriorates, and the sliding resistance when opening and closing the window glass increases, so that the seal lip sliding by the ascending and descending window glass is easily worn. Was.

As shown in FIG. 8, FIG. 11 and FIG. 12, when the distance between the connection forming parts 104a, 104b, that is, the length of the inner weather strip 103 becomes longer than a predetermined value, the inner The direction in which the inner seal lip 117 of the glass run 102 is pressed against the seal lip 116 of the weather strip 103 (arrow P in FIGS. 8 and 11).
The stress to 1) occurs. Then, this stress concentrates on the connection mold parts 104a, 104b connecting the glass run 102 and the inner weather strip 103, and the horizontal seal lip 118 and the inner seal lip 117 of the connection mold parts 104a, 104b are bent.

In this case, the connection mold parts 104a, 104
The horizontal seal lip 118 of FIG.
It is transformed so that it rises to the side, and the window glass 1
19 will be strongly pressed. Therefore, there is a problem that the sliding resistance when the window glass 119 is opened and closed increases, and the horizontal seal lip 118 is easily worn by the rising and falling window glass 119.

On the other hand, as shown in FIG. 8, FIG. 13 and FIG. 14, when the distance between the connection forming parts 104a and 104b, that is, the length of the inner weather strip 103 becomes shorter than a predetermined value, The inner weather strip 1
A stress is generated in the seal lip 118 of 03 in the direction of pulling the inner seal lip 117 of the glass run 102 (arrow P2 in FIGS. 8 and 13). Due to this stress, the inner seal lip 117 of the glass run 102 is deformed so as to be pulled toward the inner weather strip 103.
Then, the main body 120 of the glass run 102 may be in a state of being lifted from a state of being attached to the window frame 121.

As described above, when the main body 120 rises, the gap between the bottom wall 120a of the main body 120 and the edge of the window glass 119 decreases, and the two may come into contact with each other. Therefore, the window glass 119
The sliding resistance at the time of opening and closing of the
There is a problem in that the bottom wall portion 120a is easily worn.

In particular, in the extruded portion 103a for the inner weather strip 103, an insert 122 (see FIG. 8) of a sheet metal or the like is buried over substantially the entire length in order to maintain the shape. For this reason, there are few elastic portions capable of absorbing the dimensional error of the inner weather strip 103 due to the displacement of the extruded portion 103a.
Appears prominently at 104b.

The present invention has been made in view of such a problem. It is an object of the present invention to provide a method of molding a composite component capable of molding a composite component having a regular dimension without strictly positioning a member having an insert member therein.

[0018]

In order to achieve the above object, according to the first aspect of the present invention, a molded portion is connected and formed between a member having an insert member therein and another member. In the method for molding a composite part to be molded, a plurality of molding dies for molding the molded part are arranged in a predetermined positional relationship, and a part of a member having the insert member is set for each molding die. In addition, the molding positions of a plurality of molding parts are determined and the molding is performed.

In this molding method, since each molding die is previously arranged at a predetermined position, each molding part can be formed at a predetermined position. For this reason, the molded part can be formed at a predetermined position regardless of the arrangement of the member having the insert member having high rigidity and poor elasticity.

According to a second aspect of the present invention, in the method of molding a composite part according to the first aspect, the material is supplied to the plurality of molding dies in which a part of the member having the insert member is set almost simultaneously. Thus, a plurality of molded parts are molded almost simultaneously.

According to this molding method, in addition to the effect of the first aspect, each molded part can be formed quickly and more accurately at a predetermined position. According to a third aspect of the present invention, in the method of molding a composite component according to the first or second aspect, a molded part is formed at both ends of the member having the insert member.

According to this molding method, in addition to the function of the invention described in claim 3, in addition to the function of the invention described in claim 1 or 2, the molded parts at both ends of the member having the insert member are formed. Thus, it is possible to form the composite part more accurately with a predetermined interval, and to obtain a composite part having a predetermined size.

According to a fourth aspect of the present invention, in the method of forming a composite part according to any one of the first to third aspects, the member is a seal member formed by extrusion. A seal part is also formed in the molded part,
The composite component is a vehicle sealing component.

According to this molding method, it is possible to obtain a seal part having a regular size as a composite part. Inadvertent deformation of the seal member is suppressed. And the sealing component can have good sealing properties, sliding properties with window glass, and abrasion resistance.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention is embodied in a method of forming a weather strip for a front door and a rear door as a vehicle sealing part which is a composite part having an extruded part and a molded part. One embodiment will be described with reference to FIGS.

First, the structure of the weather strip for the front door will be described. As shown in FIG. 3, the weather strip 30 includes a glass run 33, an outer weather strip 34, and an inner weather strip 35 mounted on the periphery of the window glass 32 of the front door 31 for the vehicle.
It is composed of

As shown in FIGS. 1, 3 and 4, the glass run 33 is attached to the window frame 31 a of the front door 31.
Are arranged along the horizontal side and both vertical sides of the upper edge.
The glass run 33 has a plurality of extruded portions 38a for glass runs as a plurality of sealing members having substantially the same cross-sectional shape.
38e are connected via the first and second corner-shaped forming portions 39a and 39b and the first and second connection-shaped forming portions 39c and 39d, and are formed so as to form a substantially U-shaped front surface.
The glass run 33 is made of a rubber such as an ethylene-propylene-diene terpolymer (EPDM). The glass run 33 has a main body 3 fitted and fixed to the window frame 31a.
3a, and a pair of seal lips 33b and 33c that are in sliding contact with the inner and outer surfaces of the window glass 32, respectively.

As shown in FIGS. 1, 3 and 5,
The outer weather strip 34 and the inner weather strip 35 are respectively disposed outside and inside the window glass 32 between both vertical sides of the glass run 33 along the belt line portion at the upper edge of the door panel 31b of the front door 31. Is established. Both weather strips 34 and 35 are made of, for example, ethylene-propylene-diene terpolymer (EPD).
M) and the like. Both weather strips 3
Reference numerals 4 and 35 denote support portions fixed to the door panel 31b of the front door 31 along the belt line portion (the support portion 35a of the inner weather strip 35 is shown in the illustrated example).
And a seal lip that slides on the side surface of the window glass 32 (in the illustrated example, a seal lip 35b of the inner weather strip 35 is shown). Further, an insert 40 as an insert member made of sheet metal for retaining the shape is embedded in the support portion 35a.

The inner weather strip 35 has an inner weather strip extruded portion 41 as a seal member having an insert member having the same cross-sectional shape, and first and second connection die formed portions as die formed portions at both ends. 3
The glass run 33 is integrally connected to the intermediate portion of the vertical side portion via 9c and 39d.

The window strip 32 is slidably guided by the weather strip 30 configured as described above to be opened and closed, and at the same time, water, dust, noise, and the like are prevented from entering the vehicle compartment from outside the vehicle compartment. It has become.

In the molding method of this embodiment, FIG.
First, as shown in FIG.
The extrusion molded parts 41 for 8a to 38e and the inner weather strip are prepared by extrusion molding to a predetermined cross-sectional shape and cutting to a predetermined length.

In the first molding step, the opposite end portions of the adjacent extruded portions 38a and 38b are set in a molding die (not shown), and unvulcanized rubber is injected into the cavities in both the dies. Then, the rubber is vulcanized in this mold to form a first corner molding 39a between the opposed ends of the extruded parts 38a and 38b, and the opposed ends are connected to each other. Subsequently, the opposing ends of the adjacent extruded portions 38b and 38d are set in a molding die (not shown), and unvulcanized rubber is injected into cavities in both the dies. Then, the rubber is vulcanized in this mold, and the two extruded portions 38b and 38d are vulcanized.
A second corner molding 39b is formed between the opposite ends of the first and second ends, and the opposite ends are connected to each other.

Next, in the second molding step, as shown in FIG. 2, one end of the glass-run extruded portion 38a, one end of the glass-run extruded portion 38c cut to a predetermined length, and Each opposite end of one end of the inner weather strip extrusion molding section 41 is set in a cavity 45 of a molding die 44 as a molding die. In addition, one end of the glass run extruded portion 38d integrated with the glass run extruded portion 38a in the first molding step, one end of the glass run extruded portion 38e cut to a predetermined length, The opposite end portions of the other end of the inner weather strip extrusion molding portion 41 are set in a cavity 47 of a molding die 46 as a molding die.

Here, the molding dies 44 and 46 are integrated in a state where a predetermined interval is held by an interval holder 48 in advance. The inner weather strip extruded portion 41 is set so that both ends thereof are positioned in the molding dies 44 and 46 in a state of being placed on the spacing member 48.

In this state, unvulcanized rubber is injected into the cavities 45 and 47 in both dies 44 and 46,
The rubber is vulcanized in 4,46. As a result, the first and second connection mold parts 39c, 39d are simultaneously formed between the opposed ends of the extruded parts 38a, 38c, 38d, 38e, 41, and the opposed ends are connected to each other. For this reason, the first connection mold part 39c and the second connection mold part 39d
Are formed at a predetermined interval, and the inner weather strip 35 is formed without any excess or deficiency in its length.

As described above, each of the plurality of extruded portions 38
a to 38e, 41, between the opposing ends of the molded portions 39a to 3
9d is formed by connection. As a result, as shown in FIG.
Then, the weather strip 30 including the inner weather strip 35 having a predetermined size is formed. Therefore, if this weather strip 30 is used by attaching it to the peripheral portion of the window glass 32 of the front door 31 as shown in FIG.
Excellent sealing properties, sliding properties, and abrasion resistance with respect to the window glass 32 can be exhibited.

Further, as shown in FIG. 6, a weatherstrip 52 as a vehicle sealing part mounted on the peripheral portion of the window glass 51 of the rear door 50 for the vehicle is also a weatherstrip for the front door 31 for the vehicle. Molded in the same manner as 30. That is, the weather strip 52
Extrusion parts 53a, 5 for glass run as seal members
First, corner-shaped forming portions 55a and 55b are formed on the opposed ends of 3b and 53b and 53c. Next, the extruded portions 53a, 53c and 53d, 53e for the glass run and the extruded portion 54 for the inner weather strip as a sealing member.
The connection mold parts 56a and 56b are connected and formed at the opposite ends.

As a result, a weather strip 52 having a glass run 57 having a predetermined size and a substantially U-shaped front surface and an inner weather strip 58 having a predetermined size is formed. Therefore, if this weather strip 52 is used by attaching it to the peripheral portion of the window glass 51 of the rear door 50 as shown in FIG. 7, excellent sealing property, sliding property and abrasion resistance to the window glass 51 will be obtained. Can be demonstrated.

The effects that can be expected from the above embodiment will be described below. (A) In the method of forming the weather strips 30, 52, the inner weather strip extruded portions 41 and 54 having the inserts 40 therein and the glass run extruded portions 38a, 38c, 38d, 38e and 53a, 53 are provided.
c, 53d, and 53e, connection mold parts 39c, 39
d and 56a, 56b are molded using molding dies 44, 46 arranged in a predetermined positional relationship in advance.

In this molding method, each molding die 44, 4
6 is arranged at a predetermined position in advance, so that the connection mold parts 39c, 39d and 56a, 56b can be formed at the predetermined position. For this reason, it is possible to easily absorb the positional deviation and the dimensional deviation of the inner weather strip extruded portions 41 and 54 having the insert 40 therein and having high rigidity and poor elasticity. As a result, the two connection mold parts 3
9c, 39d and 56a, 56b can be formed at regular positions via regular-sized inner weather strips 35, 58. Accordingly, the glass runs 33, 57 and the inner weather strips 35, 58 can be more reliably arranged in a predetermined positional relationship, and the positioning of the inner weather strip extruded portions 41, 54 is not performed strictly. Regular-sized weather strips 30, 52 can be formed.

Thus, the weather strips 30, 52
When the is attached to the window frame 31a, the weather strips 30, 52 are prevented from being inadvertently deformed. Therefore, the weather strips 30 and 52 having good sealing properties, sliding properties with the window glasses 32 and 51, and abrasion resistance can be obtained.

(B) The weather strips 30, 52
In the method of forming, the extruded portions 41 and 54 for inner weather strip and the extruded portion 38 for glass run are used.
a, 38c, 38d, 38e and 53a, 53c, 53
d, 53e and connection mold parts 39c, 39d and 5
6a and 56b are molded simultaneously in the molding dies 44 and 46.

For this reason, the connection mold parts 39c, 39d
And 56a, 56b can be formed quickly and more accurately in place. (C) In the method of forming the weather strips 30, 52, the inner weather strip extruded portions 41,
54, the connecting mold parts 39c, 39d and 56a,
56b are formed.

For this reason, the connection mold parts 39c, 39d at both ends of the inner weather strip extrusion parts 41, 54.
And 56a, 56b can be accurately formed at predetermined intervals, and regular-sized weather strips 30, 52 can be obtained.

(Modifications) The above embodiments can be embodied with the following modifications. In the above embodiment, the glass runs 33, 57
And the inner weather strips 35 and 58 are formed of a thermoplastic elastomer such as an olefin-based thermoplastic elastomer (TPO), a soft synthetic resin such as soft polyvinyl chloride, or at least two of these thermoplastic elastomers, soft synthetic resin materials and rubber. It may be formed from a polymer blend of two materials.

In the above embodiment, first, the glass run extruded portions 38a, 38c, 38d, 38e and 5
The connection mold parts 39c, 39d and 56a, 56b are connected to the end portions 3a, 53c, 53d, 53e and the inner weather strip extrusion parts 41, 54, respectively. Next, the glass run extrusion parts 38a to 38c and 53
a-53c are provided at the opposite ends,
b and 65a, 65b may be molded.

Even in the case of the above modification, substantially the same effects as those of the above-described embodiment can be exerted. Further, technical ideas further grasped by the above embodiments will be described below together with their effects.

(1) A sealing part for a vehicle, formed by the forming method according to any one of claims 1 to 4. According to this configuration, good sealing properties,
Slidability with window glass and abrasion resistance can be exhibited.

[0049]

Since the present invention is configured as described above, it has the following effects. According to the first aspect of the present invention, each member can be arranged in a predetermined positional relationship, and a regular-sized composite part can be formed without strictly positioning a member having an insert member therein. be able to.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in (1), each molded part can be quickly and more accurately formed at a predetermined position. According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, the molded portions at both ends of the member having the insert member are formed with a predetermined distance therebetween. It can be formed accurately and a composite part having a predetermined size can be obtained.

According to the fourth aspect of the present invention, it is possible to obtain a seal part having a regular size as a composite part, and to provide a seal having good sealability, sliding property with window glass, and wear resistance. Parts can be molded.

[Brief description of the drawings]

FIG. 1 is a front view showing a weather strip for a front door formed by a forming method of the present invention.

FIG. 2 is a perspective view showing a forming process of the weather strip of FIG. 1;

FIG. 3 is a front view showing a state where the weatherstrip of FIG. 1 is mounted.

FIG. 4 is an enlarged sectional view of a main part along line 4-4 in FIG. 3;

FIG. 5 is an enlarged sectional view of a main part along line 5-5 in FIG. 3;

FIG. 6 is a front view showing a weather strip for a rear door formed by the forming method of the present invention.

FIG. 7 is an exemplary front view showing a state where the weather strip shown in FIG. 6 is mounted;

FIG. 8 is a front view showing a weather strip for a front door formed by a conventional forming method.

FIG. 9 is a perspective view showing a forming process of a first connection mold forming portion of the weather strip of FIG. 8;

FIG. 10 is a perspective view relating to a forming step of a second connection mold forming portion of the weather strip of FIG. 8;

FIG. 11 is a perspective view showing a state of a molded portion when the inner weather strip portion is connected and molded so as to be excessively long in the weather strip of FIG. 8;

FIG. 12 is an enlarged sectional view taken along line 12-12 in FIG. 11;

FIG. 13 is a perspective view showing a state of the molded portion when the inner weather strip portion is connected and molded so as to be excessively short in the weather strip of FIG. 8;

FIG. 14 is an enlarged sectional view taken along line 14-14 in FIG. 13;

[Explanation of symbols]

30, 50: weather strip as a vehicle sealing part; 35, 52: inner inner weather strip, 38a
To 38e, 53a to 53e: Extrusion molding part for glass run as a sealing member, 39c: First connection molding part as a molding part, 39d ... Second connection molding part as a molding part, 40 ... Insert member Insert as 41,
54: Extrusion molding part for inner weather strip as a member having an insert member, 44, 46 ... Molding die as a molding die, 56a, 56b ... Connection mold molding part as a molding part.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 31:30 B60J 5/00 501H (72) Inventor Shinya Kobayashi 1 Ochiai Ogatai Kasuga-cho, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Address Toyoda Gosei Co., Ltd. (72) Inventor Masato Taguchi 1 Ochiai, Ogai, Kasuga-cho, Nishi-Kasugai-gun, Aichi F-term (reference) 3D024 AA08 AB04 AB21 AB24 AB27 AB41 AB57 4F202 AA45 AD05 AD18 AD35 AH23 CA11 CB12 CQ05 4F206 AA45 AD05 AD18 AD35 AH23 JA07 JB12 JB20 JQ81

Claims (4)

[Claims] 1. A method of forming a composite part by connecting and forming a molding part between a member having an insert member therein and another member, wherein a plurality of molding dies for molding the molding part are provided. Are arranged with a predetermined positional relationship, a part of the member having the insert member is set for each of the molding dies, and the molding positions of a plurality of molding parts are determined and molded. A method for forming composite parts. 2. The method according to claim 1, wherein a material is supplied substantially simultaneously to a plurality of molding dies on which a part of the member having the insert member is set, and the plurality of molded parts are molded substantially simultaneously. 5. The method for molding a composite part according to 1. 3. The method for forming a composite part according to claim 1, wherein the molded parts are formed at both ends of the member having the insert member. 4. The vehicle according to claim 1, wherein the member is a seal member formed by extrusion molding, a seal portion is also formed in the molded portion, and the composite component is a vehicle seal component. A method for molding a composite part according to claim 3.