JPH1148304A - Trim, insert for trim, and manufacture of trim - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trim, an insert for the trim, a manufacture of the trim capable of raising the yield of articles by preventing the lateral warpage relative to the longitudinal direction in the manufacturing process while ensuring a curvature function of articles during the assembling period of time. SOLUTION: The insert 11 is formed of a number of form retaining parts 12 and slits 13 alternatively arranged in the longitudinal direction and a number of connection parts 14, 15 for joining the interfaces of the form retaining parts 12 in two rows. In the connection parts 14 in one row, separation grooves 16 extending obliquely with respect to the short direction of the insert 11 are formed by being thinned at one for two. At a separation process after the extrusion molding, by weakening and cutting the thinned wall parts remaining at the bottom of the groove of the separation grooves 16, the connection parts 14 in one row is separated by every other line within rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trim used as a sealing material or a decorative material for an automobile or the like, an insert buried in a polymer material such as rubber or resin for maintaining the shape of the trim, and The present invention relates to a trim manufacturing method.

[0002]

2. Description of the Related Art A weather strip 51 mounted on a door opening of an automobile shown in FIG. 9 comprises a trim main body 55 made of rubber and having a substantially U-shaped cross section, and a flange holding lip 56 projecting from the inside thereof. A trim 52 is provided. An insert 61 made of sheet metal is embedded in the trim main body 55. A lip portion 53 protrudes from the inner side wall of the trim main body 55 and a hollow seal portion 54 protrudes from an outer side wall of the trim main body 55. A decorative layer 57 is provided on the outer surfaces of the trim body 55 and the lip 53.
Is provided. The weather strip 51 has a trim 5
It is assembled to the vehicle body by sandwiching the flange at the door opening edge with the second flange holding lip 56. For example, in the corner portion of the door opening edge, the trim 61 is bent along the curvature of the same, so that the insert 61 Is required to have a function of bending in a longitudinal direction in a bent shape having a substantially U-shaped cross section.

FIG. 10 shows a conventional insert 61 having this function. The insert 61 includes a number of strip-shaped shape retaining portions 62 and slits 63 alternately arranged in the longitudinal direction, and a number of connecting portions 64 and 65 for connecting the shape retaining portions 62 to each other in two rows. . Inserts 6 are provided in all the connecting portions 64 in one row corresponding to the hollow seal portions 54.
A separation groove 66 extending in parallel with the short direction (width direction) of the first pair is formed.

The weather strip 51 is provided with a decorative layer 57.
Is manufactured by the method shown in FIG. 7 or FIG.

FIG. 7 shows a manufacturing method in the case where the decorative layer 57 is made of a woven fabric, a non-woven fabric, etc., and the outline thereof is as follows. (1) The extruder 31 simultaneously extrudes each part 52, 53 and 54 of the weather strip 51 with rubber. At this time, the trim 52 is extruded into a substantially flat plate shape as shown by a two-dot chain line in FIG. (2) The extruded weather strip 51 is passed through the vulcanization tank 32 and vulcanized. (3) The vulcanized weather strip 51 is repeatedly bent in the longitudinal direction by the separator 33, and the thin portion remaining at the bottom of each separation groove 66 is weakened and cut off, so that all of the one row is separated. The connecting portion 64 is separated in the rubber. (4) The weather strip 51 from which the connecting portion 64 has been separated is subjected to the buffing machine 34, the adhesive application machine 35, and the adhesive drying furnace 36.
To apply an adhesive to the outer surfaces of the trim body 55 and the lip 53. Subsequently, the decorative layer 57 is provided by attaching a woven cloth to the adhesive on the same surface by the cloth attaching machine 37, and the adhesive is cured through the adhesive curing tank 38. (5) After the trim main body 55 of the weather strip 51 provided with the decorative layer 57 and the shape retaining portion 62 of the insert 61 are bent into a substantially U-shaped cross section by the U-shaped bending machine 39, a desired cutting is performed by the cutting machine 40. By cutting into lengths, the weather strip 51 having the cross-sectional shape shown in FIG. 9 is completed.

FIG. 8 shows a manufacturing method when the decorative layer 57 is made of resin, TPE (thermoplastic elastomer), etc., and the outline is as follows. (I) Same as above (1) (ii) Same as above (2). (Iii) Trim body 5 of vulcanized weather strip 51
5 and the outer surface of the lip 53 are extruded and covered with TPE by the second extruder 41, and pressed by a pressure roller 42;
The decorative layer 57 is provided by applying a grain pattern by the grain applying roller 43 and by cooling in the cooling tank 44. (Iv) Same as (3) above. (V) Same as (5) above. However, when the line becomes long and cannot fit straight in the factory, it is necessary to fold the feed direction of the weather strip 51 by the fold guide 45 in front of the U-bending machine 39, for example.

[0007]

However, according to the conventional insert 61, all the connecting portions 64 in one row are separated, so that the conveying speed of the weather strip 51 changes in the post-separation step, and the feed is not performed. As if stagnant,
With the contraction of the weather strip 51, as shown in FIG. 11, a force is applied to the insert 61 in the compression direction, and the separation pieces 64a and 64b of each connecting portion 64 overlap each other, and as shown in FIG. 11 and FIG. In addition, as shown by the dotted lines in the plan views of FIG. 8B, the weather strip 51 may warp laterally with respect to the longitudinal direction.

[0008] In the manufacturing method shown in FIG.
When the weather strip 5 enters the pressure roller 37a inside the
Since the feed of 1 is stagnated, the sideward warpage of the weather strip 51 becomes large before the cloth pasting machine 37, and the cloth pasting machine 37 may not function properly.

In the manufacturing method shown in FIG. 8, when the distance between the separator 33 and the U-shaped bending machine 39 becomes longer due to the folding, the sideward warpage of the weather strip 51 increases, and the flow stagnates. Therefore, a longitudinal compressive force acts on the insert 61, and the U-bending machine 39 may not function properly.

As described above, it is difficult to send the laterally warped weather strip 51 straight to the subsequent line, and the subsequent processing cannot be performed. Therefore, the weather strip 51 must be discarded as a defective product, and the yield is reduced. There was a problem that was bad.

SUMMARY OF THE INVENTION An object of the present invention is to provide a trim and a trim which can secure a bending function as a product at the time of assembling, prevent a warp in a longitudinal direction in a manufacturing process, and improve a product yield. It is an object of the present invention to provide a method for manufacturing inserts and trims.

[0012]

Accordingly, the present invention employs the following means or in a sheet metal insert embedded in a trim polymer material.

[0013] A plurality of shape-retaining portions and slits alternately arranged in the longitudinal direction are provided, and a number of connecting portions for connecting the shape-retaining portions with each other in two rows. An insert for trim characterized by being thinned out. Therefore, the connecting portion in one row is composed of a connecting portion having a separating groove and a connecting portion having no separating groove.

This means solves the above problem by focusing on the number of separation grooves. The method of thinning out the separation grooves is not particularly limited. For example, two or three separation grooves may be formed in three adjacent connecting portions (forming ratio 2/3),
Similarly, it can be formed at a ratio of one to two (1/2), and similarly formed at a ratio of one to three (1/3). Its formation ratio is preferably 4/5 to 1/5, and 2
/ 3 to 1/3 is more preferred. If the formation ratio is higher than 4/5, the effect of preventing warpage to the longitudinal direction in the trim manufacturing process is reduced, and if it is lower than 1/5, the bending function as a product at the time of assembly is reduced. Because.

[0015] A plurality of shape-retaining portions and slits alternately arranged in the longitudinal direction, and a large number of connecting portions for connecting the shape-retaining portions with each other in two rows. A trim insert characterized by forming a separating groove extending obliquely to a direction.

This means solves the above problem by focusing on the direction of the separating groove. The angle of the separating groove with respect to the short direction of the insert is not particularly limited, but may be 15 to 75.
Degree is preferable, and 30 to 60 degrees is more preferable. When the angle is 15 to 75 degrees, when the connecting portion is separated into two separating pieces by the separating groove, the acute angle portions of the two separating pieces tend to warp in opposite directions, and the separating pieces overlap. This is because it becomes difficult.

In this means, the number of separating grooves is not particularly limited, and diagonal separating grooves may be formed in all the connecting portions in one row, or may be formed by thinning.

A plurality of shape-retaining portions and slits alternately arranged in the longitudinal direction, and a large number of connecting portions for connecting the shape-retaining portions to each other in two rows, and a short portion of the insert is provided in the connecting portion of one of the rows. A trim insert, wherein separation grooves extending obliquely to a direction are thinned out.

This means solves the above problem by focusing on the number and direction of the separating grooves. The method of thinning out the separation groove and the angle of the separation groove with respect to the short direction of the insert are the same as described above.

Next, the trim according to the present invention comprises:
Or a trim body made of a polymer material in which the insert is embedded, wherein the trim body and the shape retaining portion of the insert are bent to have a substantially U-shaped cross section, and two rows of the inserts are connected to the respective side walls of the trim body. The connecting portions of one row are separated by separating the groove bottom of the separating groove.

Next, the method for producing a trim according to the present invention comprises the following steps: an extrusion step of coating a polymer material around the above-mentioned means or an insert and extruding a substantially flat trim body; A solidifying step of solidifying, a separating step of separating the connecting portion of one row of the insert by separating the groove bottom of the separating groove, and bending the trim main body and the shape retaining portion of the insert into a substantially U-shaped cross section. And a bending step of disposing two rows of connecting portions of the insert on the respective side wall portions of the trim main body.

Here, the solidification step is a vulcanization step when the polymer material is rubber, and a cooling step when the polymer material is resin or TPE.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a weather strip provided with a trim to be mounted on a door opening of an automobile will be described below with reference to the drawings.

As shown in FIG. 4, the weather strip 1 of the embodiment shown in FIGS. 1 to 4 has a trim body 5 having a substantially U-shaped cross section made of EPDM (ethylene / propylene / diene copolymer) solid rubber. And a flange 2 comprising a flange holding lip 6 protruding from the inside thereof.
An insert 11 made of sheet metal is embedded in the trim main body 5.

On the inner side of the inner side wall of the trim body 5,
The lip portion 3 that contacts the vehicle body panel is formed to project from EPDM solid rubber. Trim body 5 and lip 3
Is provided with a decorative layer 7 on the outer surface thereof. A pattern such as a grain pattern is formed on the surface of the used decorative layer 7.
The decorative layer 7 is not particularly limited, and examples thereof include TPE, PVC (vinyl chloride), woven fabric, and nonwoven fabric. A hollow seal portion 4 for receiving an outer peripheral portion of a door panel (not shown) and sealing the space therebetween is formed on the outer side wall of the trim main body 5 with EPDM sponge rubber.

When assembling the weather strip 1 to the vehicle body, the weather strip 1 is assembled by sandwiching the flange at the door opening edge with the flange holding lip 6 of the trim 2. In order to bend the trim 2 at the same time, the insert 11 is required to have a function of bending in a longitudinal direction in a bent shape having a substantially U-shaped cross section.

The insert 11 is made of a sheet metal having a thickness of about 0.5 mm. Specifically, the insert 11 has a large number of shape-retaining portions 12 and slits 13 which are alternately arranged in the longitudinal direction.
And a number of connecting portions 14 and 15 connected to the rows.
The dimensions of each shape retaining part 12 and each slit 13 are both [0.5
.About.4.0 mm] .times. [20.about.40 mm], and the width of each connecting portion 14, 15 is 1.0.about.4.0 mm.

The connecting portion 14 in one row corresponding to the hollow seal portion 4 has a separating groove 16 extending obliquely at an angle of about 45 degrees with respect to the short direction of the insert 11. The connecting portions 14 having the separating grooves 16 and the connecting portions 14 having no separating grooves 16 are provided side by side at every other ratio. Each separation groove 16 has a depth of 0.1
The thickness of the thin portion 17 remaining at the bottom of the separation groove 16 is 0.2 to 0.3 mm.
0.4 mm.

The weather strip 1 is manufactured by a method shown in FIG. 7 or FIG. 8 according to the type of the decorative layer 7. First, FIG. 7 shows a manufacturing method in the case where the decorative layer 7 is made of a woven fabric, a nonwoven fabric, or the like, and the outline thereof is as follows.

(1) The extruder 31 simultaneously extrudes the trim portion 2 and the lip portion 3 of the weather strip 1 with EPDM solid rubber and the hollow seal portion 4 with EPDM sponge rubber. At this time, as shown by a two-dot chain line in FIG. 1, the trim 2 is extruded into a substantially flat shape by coating a rubber around the flat insert 11. (2) The extruded weather strip 1 is fed with a tensile force applied thereto and passed through a vulcanization tank 32 to vulcanize the rubber. (3) The vulcanized weatherstrip 1 is repeatedly bent in the longitudinal direction by the separator 33, and the thin portion remaining at the bottom of each separation groove 16 is weakened and cut off, so that the connection portion of one row is separated. Separate every other 14 in the rubber. (4) The weather strip 1 from which the connecting portion 14 has been separated is passed through a buffing machine 34 to reveal new surfaces of the trim body 5 and the lip portion 3 and further passed through an adhesive applicator 35 and an adhesive drying furnace 36. Then, an adhesive is applied to the outer surfaces of the trim main body 5 and the lip portion 3. Subsequently, the decorative layer 7 is provided by attaching, for example, a woven fabric to the adhesive on the same surface by the cloth applying machine 37, and the adhesive is cured through the adhesive curing tank 38. (5) The trim main body 5 of the weather strip 1 provided with the decorative layer 7 and the shape-retaining portion 12 of the insert 11 are bent by a U-shaped bending machine 39.
Then, the connecting portions 14 and 15 in the two rows of the insert 11 are respectively arranged on the respective side wall portions of the trim main body 5. After that, the weather strip 1 is cut into a desired length by the cutting machine 40 to complete the weather strip 1 having a sectional shape shown in FIG.

FIG. 8 shows a manufacturing method when the decorative layer 7 is made of a resin, TPE or the like, and the outline is as follows.

(I) Same as above (1) (ii) Same as above (2) (Iii) The second extruder 41 extrudes and coats, for example, TPE on the outer surfaces of the trim main body 5 and the lip portion 3 of the vulcanized weather strip 1 and press-bonds them with a pressure roller 42.
The decorating layer 7 is provided by applying a grain pattern with the grain applying roller 43 and cooling in the cooling tank 44. (Iv) Same as (3) above. (V) Same as (5) above. However, if the line is long and cannot fit straight into the factory, it is necessary to fold the feed direction of the weather strip 1 by the fold guide 45 before the U-bending machine 39, for example.

In the present embodiment, the warpage of the weather strip 1 in the longitudinal direction in the manufacturing process is prevented by the following operation, and the results are shown in FIGS.
As shown by a solid line in each plan view of (b), the weather strip 1 can be sent in a straight form to a subsequent line after the separation step without any trouble. Further, since the connecting portions 14 in one row are separated from each other, the bending function as a product when the vehicle body is assembled can be sufficiently ensured.

Since the separation groove 16 of the present embodiment is formed obliquely, as shown by the arrow in FIG. 3, the acute angle portions 14c, 14c,
14d is separated in a form that warps in opposite directions.
For this reason, even if the flow of the weather strip 1 stagnates after the separation step and a compressive force acts on the insert 11 or the weather strip 1 contracts, the separation pieces 14a,
The end faces of 14b are sharp corners 14c and 14d of each other.
And the separation pieces 14a and 14b do not overlap each other.

In the present embodiment, the separation groove 16 is
4 are formed at a ratio of one to two, even if the separation pieces 14a and 14b overlap each other, the number of the overlaps is less than half of the conventional one, and the warpage of the weather strip 1 in the longitudinal direction is reduced. Is negligible and can be kept within an allowable range.

Next, FIG. 5 shows a modified example of the insert. In this insert 21, diagonal separating grooves 16 are formed in all the connecting parts 14 in one row, and all the connecting parts 14 in one row are separated in the above separating step. In the case of the insert 21, the number of the connecting portions 14 to be separated increases as compared with the above embodiment, but since the connecting portions 14 are separated in the form shown in FIG. Suppress overlap,
Warpage of the weather strip in the longitudinal direction can be prevented.

FIG. 6 shows another modification of the insert. In this insert 22, a separation groove 23 extending in parallel with the short direction of the insert 22 is formed in the connecting portion 14 in one row at a ratio of one to two, and in the above separating step, the connecting portion 14 in one row is formed. Are separated from each other. In the case of this insert 22, the separation groove 2
3 is parallel to the short direction of the insert 22, the above-mentioned warping does not occur, and the separation pieces are liable to overlap with each other. 1 can be suppressed from warping laterally with respect to the longitudinal direction within an allowable range.

It should be noted that the present invention is not limited to the above-described embodiment, and may be embodied by appropriately changing the scope of the invention as follows, for example, as follows. (1) In the above embodiment and the modified example, the separation grooves 16 and 23 are formed in the connection portions 14 in the row corresponding to the hollow seal portion 4, but the separation grooves are formed in the connection portions 15 in the row corresponding to the lip portion 3. 16 and 23 may be formed. (2) The connecting portions may be provided in two rows at the central portion in the lateral direction of the insert and one side edge portion, and a separating groove may be formed at the connecting portion in the row closer to the side edge portion.

[0039]

As described in detail above, the trim according to the present invention,
According to the method for manufacturing the insert for trim and the trim, an excellent effect that the yield of the product can be improved by preventing warping in the longitudinal direction in the manufacturing process while securing the bending function as the product at the time of assembly. Play.

[Brief description of the drawings]

FIG. 1 is a plan view showing a trim insert according to an embodiment of the present invention and a form at the time of extruding a weather strip in which the insert is embedded.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view showing a separated form of a connecting portion in the insert.

FIG. 4 is a cross-sectional view of the weather strip after a U-shaped bend.

FIG. 5 is a plan view showing a modified example of the insert.

FIG. 6 is a plan view showing another modification of the insert.

FIG. 7 schematically shows a method of manufacturing the weather strip,
(A) is a side view, (b) is a partial plan view.

8A and 8B schematically show another method of manufacturing the weather strip, wherein FIG. 8A is a side view and FIG. 8B is a partial plan view.

FIG. 9 is a cross-sectional view of a conventional weather strip after a U-shaped bend.

FIG. 10 is a plan view showing an extruded form of the weather strip and a trim insert embedded therein.

FIG. 11 is a plan view showing a problem of the trim insert.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weather strip 2 Trim 3 Lip part 4 Hollow seal part 5 Trim main body 6 Flange holding lip 7 Decorative layer 11 Insert 12 Shape retaining part 13 Slit 14 Connection part (one row) 14a, 14b Separation piece 14c, 14d Sharp angle Part 15 (the other row) connecting part 16 Separation groove 17 Thin part 21 Insert 22 Insert 23 Separation groove 31 Extruder 32 Vulcanizing tank 33 Separator 34 Buffing machine 35 Adhesive applicator 36 Adhesive drying furnace 37 Cloth pasting machine 37a Crimping roller 38 Adhesive curing tank 39 U-bending machine 40 Cutting machine 41 Second extruder 42 Crimping roller 43 Shrinking roller 44 Cooling tank 45 Folding guide

Claims (5)

[Claims] 1. A sheet metal insert embedded in a polymer material of a trim, the insert comprising a plurality of shape-retaining portions and slits alternately arranged in a longitudinal direction, and two rows between the shape-retaining portions. And a plurality of connecting portions that are connected to each other, and a separating groove is thinned out in the connecting portions in one row. 2. An insert made of sheet metal embedded in a polymer material of a trim, the insert comprising a plurality of shape-retaining portions and slits alternately arranged in a longitudinal direction, and two rows between the shape-retaining portions. And a plurality of connecting portions that are connected to each other, and a separating groove that extends obliquely to the short direction of the insert is formed in one row of connecting portions. 3. A sheet metal insert embedded in a polymer material of a trim, the insert comprising a plurality of shape-retaining portions and slits alternately arranged in a longitudinal direction, and two rows between the shape-retaining portions. And a plurality of connecting portions that are connected to each other, and a separation groove that extends obliquely to the short direction of the insert is thinned out in the connecting portion of one row. 4. A trim body made of a polymer material in which the insert according to claim 1, 2 or 3 is embedded, wherein the trim body and the shape retaining portion of the insert are bent into a substantially U-shaped cross section. A trim in which two rows of connecting portions of the insert are disposed on respective side walls of the trim main body, and the connecting portions of one row are separated by separating a groove bottom of the separating groove. . 5. An extrusion step of coating a polymer material around the insert according to claim 1, 2 or 3, and extruding a substantially flat trim body, and a solidifying step of solidifying the polymer material of the trim body. A separating step of separating the connecting portion of one of the rows of the insert by separating a groove bottom of the separating groove; and a cross section substantially U of the trim main body and the shape retaining portion of the insert.
Folding the insert into two rows and arranging the two rows of connecting portions of the insert on the respective side wall portions of the trim main body.