JP2580890B2 - Patterned connection method for extruded bodies with different stiffness - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of connecting a plurality of extruded bodies such as a door glass run for an automobile, and simultaneously extruding the extruded bodies.
The present invention relates to a method for forming a pattern on a body and a mold connecting portion .

[0002]

2. Description of the Related Art As an extruded product formed by connecting a plurality of extruded bodies with a mold, for example, a door glass run for slidingly guiding a window glass of an automobile is known. FIG. 5 is a front view of a front door of an automobile equipped with a conventional door glass run as viewed from the passenger compartment side. In the drawing, reference numeral 1 denotes a window frame of a front door, 2 denotes a window glass, 3 denotes a bracket for a door mirror attached to a front portion of the window frame 1, and 4 denotes a sliding portion between the window frame 1 and the window glass 2. A door glass run, 5 indicates a door belt line.

A conventional door glass run 4 includes a first extruded body 31 extending obliquely downward from a roof portion of a vehicle body toward a door mirror bracket 3, and a door belt line 5 extending from a lower front end of the first extruded body 31. A second extruded body 32 extending downward, a third extruded body 33 extending further downward from the lower end of the second extruded body 32, and a fourth extrusion suspended from the rear end of the first extruded body 31 beyond the door belt line 5 It comprises a body 34 and a fifth extruded body 35 extending further downward from the lower end of the fourth extruded body 34. Each extruded body 31-35 is EPDM
(Ethylene-propylene-diene copolymer) is formed by cutting an extruded product made of a solid rubber material into a predetermined length, and setting their ends in a mold (not shown). By filling the rubber material and providing the connecting portion 7, they are mold-connected to each other. The method of this type connection is disclosed in JP-A-2-48227 and JP-A-2-48.
No. 228 gazette.

[0004] The first extruded body 31, the second extruded body 32, and the fourth extruded body 34 are respectively exposed above the door belt line 5 to the passenger compartment side. Was formed by the following method. First, in each of the extruded bodies 31, 32, and 34, a roller (not shown) provided with a grain pattern is used.
When the surface of each of the extruded bodies 31, 32, and 34 at the time of extrusion molding is soft, the roller is pressed onto the surface to transfer the grain pattern. In this case, the first extruded member 31 and the second extruded member
A sheet metal insert (not shown) for reinforcement is embedded in each of the extruded body 32 and the fourth extruded body 34. In addition, since the 3rd extruded body 33 and the 5th extruded body 35 located below the door belt line 5 are not exposed to the outside, it is not necessary to form a grain pattern, and, of course, the sheet metal insert is not provided. Next, in the connection portion 7, a grain pattern is provided on the molding surface of the mold, and the grain pattern is transferred to the material injected at the time of forming to form.

[0005]

However, according to the conventional mold connecting method, since the grain pattern is formed at a portion corresponding to the door mirror bracket 3, the first extruded body 31 and the third
It was necessary to provide the second extruded body 32 containing the insert between the extruded body 33 and the extruded body 33. As a result, a total of five extruded bodies were required, and the number of components of the door glass run 4 was increased. For this reason, the number of man-hours and the number of molds for forming the connection part 7 increase, and there has been a problem that the cost is high. Moreover,
Since many slits are formed on the sheet metal insert so that the extruded body can be bent in the longitudinal direction during assembly, if the roller is strongly pressed from above, insert marks like bellows may appear on the surface. There is. In this case, especially when it appears on the second extruded body 32 in the vicinity of the door mirror bracket 3 which is easy to enter the sight line of the occupant, the appearance is impaired, so that it is necessary to improve the design.

Therefore, an object of the present invention is to improve the first extruded body.
The rigidity is low, so the instantaneous pressing by the roller is deep
The first extruded body is also placed on the surface of the second extruded body where pattern formation is difficult.
So that a pattern of approximately the same depth as the pattern
The interposition of another extruded body that was necessary for pattern formation
Eliminates the need for the number of components, mold forming man-hours, and dies
Reduce the number and make sure no borders are visible on the pattern
To improve the design compared to the case where another extruded body is interposed.
It is an object of the present invention to provide a method for connecting extruded bodies of different stiffness, which can be raised.

[0007]

In order to solve the above problems BRIEF SUMMARY OF THE INVENTION, texturing type connection method different extrudate rigidity of the invention, an end portion of the first extruded body pattern of a predetermined depth is affixed The end of the second extruded body, which has lower rigidity than the first extruded body and has no pattern, is set in a mold at a predetermined interval, and the following (a), (b) and (c) are set. Process simultaneously
It is characterized by the following. (A) A first pattern having substantially the same depth as the pattern of the first extruded body is provided.
Fill the first part of the provided mold with rubber or resin material
By doing so, the end portions of the first extruded body and the second extruded body
While forming a connecting portion between the above, the surface of the connecting portion
The first pattern is transferred and has substantially the same depth as the pattern of the first extruded body.
Is formed. (B) a mold provided with a second pattern deeper than the first pattern
By pressing the second part of the second extruded body against the second extruded body,
A second pattern is pressed into the surface of the second extruded body to form the first pattern.
A pattern having substantially the same depth as the pattern of the extruded body is formed. (C) a depth from a depth of the first pattern to a depth of the second pattern;
The third part of the mold provided with a gradually changing third pattern
By the minute, the boundary portion between the connection portion and the second extruded body
Form a pattern with no visible boundary on the surface. The first extrusion
The body can be used with an embedded insert,
2 Use extruded body without embedded insert
it can.

Here, extruded bodies having different stiffnesses are connected by a mold.
The Kill extrusion, for example, glass run, window molding, etc. for interior garnish, mention may be made of rubber or synthetic resin products are attached to each unit of the motor vehicle
You. Examples of the “pattern” include a grain pattern, a wavy pattern, and a spot pattern, and a grain pattern is often used for an extruded product mounted on the cabin side of an automobile.

[0009]

SUMMARY OF According to patterning type connection method different extrudate rigidity of the invention, the connection portion and the first extrudate and the second extrudate
At the same time as the mold connection, the connection part is almost the same as the pattern of the first extruded body.
Not only can one-depth patterns be formed,
Instantaneous pressing by rollers due to lower rigidity than extruded body
The surface of the second extruded body where it is difficult to form a deep pattern
It is possible to form a pattern with almost the same depth as the pattern of one extruded body.
At the boundary between the second extruded body and the connection part.
In this way, the boundary line can be made invisible. Therefore, conventionally, a pattern is formed between the first extruded body and the second extruded body.
A that it is not necessary to interpose another extrusion body sheet metal insert is embedded which was required for. And, as mentioned above
The border can be hidden from the pattern as
The design is improved as compared with the case where a birthplace is interposed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a method of connecting a mold for a door glass run for an automobile will be described with reference to FIGS. FIG. 1 is an exploded perspective view showing a mold used for connecting a mold of a door glass run for an automobile, FIG. 2 is a perspective view showing a main part of a door glass run connected by the mold of FIG. 1, and FIG. FIG. 1 schematically shows a pattern provided on a molding surface of a mold.
FIG. 4 is a front view of the entire door glass run as viewed from the passenger compartment side.

As shown in FIG. 4, the door glass run 4 of this embodiment includes a first extruded body 11 extending from the roof to the upper end of the door mirror bracket 3, and a door belt extending from the lower front end of the first extruded body 11. A second extruded body 12 extending downward beyond the line 5, a third extruded body 13 hanging down from the rear end of the first extruded body 11 across the door belt line 5, and further downward from a lower end of the third extruded body 13 And a fourth extruded body 14 extending to the outside. Then, the first extruded body 11 and the third extruded body 13 slide and guide the window glass 2 (see FIG. 5) above the door belt line 5, and the second extruded body 12 and the fourth extruded body 14 are moved along the door belt line. The window glass 2 is slid and guided below the window 5. In addition, each extruded body 11-14
Is molded from a solid rubber material such as EPDM as in the prior art.

The first extruded body 11 and the third extruded body 13 are formed by cutting extruded products having the same cross-sectional shape to a required length, respectively, and as shown in FIGS. 5), and a guide portion 9 for slidingly guiding the window glass 2.
A sheet metal insert 6 for reinforcement is embedded in the trim portion 10, and a texture 16 is formed on a surface exposed to the vehicle interior side by a roller simultaneously with extrusion molding.
Each of the second extruded body 12 and the fourth extruded body 14 is formed by cutting an extruded product having the same cross-sectional shape into a required length, includes a guide portion 9 and a design piece 8, and is provided with a trim portion and a sheet metal insert. Not been. Since the design piece 8 below the door belt line 5 is unnecessary, it is cut off, leaving only the portion corresponding to the door mirror bracket 3, and the design piece 8 of this portion is left.
Is formed on the surface of. Then, the connecting portion 7 is formed between the first extruded body 11 and the second extruded body 12, and a grain pattern 17 is formed on the surface thereof. Each of the grain patterns 16 to 18 is shown by hatching in FIG.

A mold 20 for molding the connecting portion 7 is provided with a first mold.
An upper die 21 and a lower die 22 in which the ends of the extruded body 11 and the second extruded body 12 are set at a predetermined interval;
1 and a middle plate (core) 23 inserted into the design piece 8 of the second extruded body 12. Upper mold 2
1 is provided with an inlet 24, and the middle plate 23 is provided with a gate 25. As shown in FIG. 1 and FIG. 3, the first extruded body 1
A first pattern 26 having substantially the same depth (about 60 μm) as the one grain pattern 16 is engraved. A second pattern 27 that is deeper (about 120 μm) than the first pattern 26 is engraved on a molding surface of a portion of the second extruded body 12 that is joined to the design piece 8. On the molding surface at the boundary between the first pattern 26 and the second pattern 27,
A third pattern 28 whose depth gradually changes (about 60 to 120 μm) is engraved. The inner surface of the upper die 21 that is joined to the end of the first extruded body 11 is a pattern relief portion (no pattern) 29. The middle plate 23 includes the second extruded body 12
A built-up portion 30 for crimping the design piece 8 to the second pattern 27 of the upper mold 21 is formed. In addition, the first to third
The patterns 26 to 28 are shown by hatching in FIG.

Next, a description will be given of a method of connecting the first extruded body 11 and the second extruded body 12 of the door glass run 4 using the mold 20 configured as described above. The first extruded body 11 and the second extruded body 12 are each cut to a required length after extrusion molding. On the surface of the trim portion 10 of the first extruded body 11, a texture 16 is formed in advance by a roller.
In the second extruded body 12, an unnecessary portion is cut off, and the design piece 8 is provided only in a portion corresponding to the door mirror bracket 3. Then, the first extruded body 11 provided with the grain pattern 16
Is set at a predetermined interval between the upper die 21 and the lower die 22 of the mold 20. Further, the trim plate 10 of the first extruded body 11 and the design piece 8 of the second extruded body 12 have the middle plate 23.
Is inserted.

In this state, a plasticized material such as EPDM is filled into the cavity of the mold 20 from the injection port 24 of the upper mold 21 through the gate 25 of the middle plate 23. As a result, the connection portion 7 is formed between the end portions of the first extruded body 11 and the second extruded body 12, and the first pattern is formed on the surface thereof by the first pattern 26 provided on the molding surface of the upper die 21. A grain pattern 17 having substantially the same depth as the eleven grain pattern 16 is formed. The second pattern 27 of the upper mold 21 is transferred to the surface of the design piece 8 of the second extruded body 12, and the grain pattern 18 is formed thereon, and the upper mold 21 is formed at the boundary between the grain patterns 17 and 18. Is transferred. At this time, the rigidity of the design piece 8 is relatively small, but the second pattern 27 is deeper than the first pattern 26 and the depth of the third pattern 28 is gradually changing. The pattern 18 is the grain pattern 1 of the connection portion 7
7 is formed at substantially the same depth. In addition, the second pattern 27
Even if it is deeper than the first pattern 26, the grain pattern 18 is a grain pattern
Pressing deeply with the second pattern 27 causes the same depth as
The surface of the pressed design piece 8 is not completely permanently deformed,
This is because the elasticity causes a partial return. Then, if the mold is released after the material has solidified, the mold connection between the first extruded body 11 and the second extruded body 12 is completed. The first and third extruded bodies 11 and 13 and the third and fourth extruded bodies 13 and 14 are connected in a conventional manner.

As described above, according to the mold connecting method of this embodiment, the grain patterns 17 and 18 are formed on the connecting portion 7 and the design piece 8 of the second extruded body 12 simultaneously with the forming of the connecting portion 7. You. Therefore, there is no need to interpose another extruded body in which a sheet metal insert is embedded between the first extruded body 11 and the second extruded body 12, which is conventionally required. , And the number of molds can be reduced, and the door glass run 4 can be manufactured at low cost. In addition, since the first to third patterns 26 to 28 provided on the molding surface of the upper die 21 are faithfully transferred to the surfaces of the connection portions 7 and the design pieces 8, the sharpness is sharper than in the case of the conventional roller. The appearance of the grain patterns 17 and 18 having a good appearance can be formed, so that the design of a portion that is exposed from the door mirror bracket 3 and exposed to the vehicle interior can be improved. In particular, the design piece 8 is made up of the upper mold 2 by the overlaid portion 30 of the middle plate 23.
1 is pressed to the second pattern 27, so that the grain pattern 18
Can be formed clearly, and since the sheet metal insert is not buried in the second extruded body 12, there is no possibility that insert marks will appear on the surface of the design piece 8. In addition, the upper mold 21
Since the depths of the first to third patterns 26 to 28 differ from each other, the grain pattern 16 of the first extruded body 11, the grain pattern 17 of the connection part 7, and the grain pattern 18 of the design piece 8 are substantially uniform in depth. Thus, these boundaries can be eliminated.

The present invention is not limited to the door glass run 4 of the above-described embodiment, but may be applied to rubber products mounted on various parts of an automobile, such as a window molding, an interior garnish, or the like. It may be embodied by applying to various extruded products. In addition, the shape of the pattern and the cross-sectional shape of the extruded bodies 11 to 14 may be deformed, or a soft synthetic resin material such as PVC may be used in place of the rubber material without departing from the spirit of the present invention. It is also possible to change the shape, material, and configuration of the device as appropriate to embody.

[0018]

As described above in detail, Tsuyoshi of claim 1, wherein
According to patterning type connection sex different extrudate, first
Instantaneous pressing by rollers due to rigidity compared to extruded body
The surface of the second extruded body where it is difficult to form a deep pattern
It is possible to form a pattern with almost the same depth as the pattern of one extruded body.
At the boundary between the second extruded body and the connection part.
In this way, the boundary line can be made invisible. Follow
Te, between the first extruded body and the second extrudate, the conventional pattern formation
It is not necessary to interpose a separate extruded body sheet metal insert is embedded which was required for the components number, steps of molding, and can be inexpensively manufactured by reducing the mold number. I
Or, as described above, you can make the border invisible in the pattern.
Therefore, the design is better than when another extruded body is interposed.
Up.

Further, the extruded bodies having different rigidities according to the second aspect of the present invention.
Of According to patterning type connection method, in addition to the above effects, the second
Use extruded parts without embedded inserts
So, push the second pattern on the surface of the second extruded body to make the pattern
There is no risk of insert marks appearing during formation.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a mold for performing a method of connecting a mold for a door glass run for an automobile according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of a door glass run connected by the mold of FIG. 1;

FIG. 3 is a rear view of the upper mold of FIG. 1 schematically showing a pattern provided on a molding surface of the mold.

FIG. 4 is a front view showing an entire door glass run according to an embodiment of the present invention.

FIG. 5 is a front view showing a front door on which a conventional door glass run is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 Door glass run 7 Connection part 11 1st extruded body 12 2nd extruded body 16-18 Grain pattern 20 Die 26 1st pattern 27 2nd pattern 28 3rd pattern

Claims (2)

(57) [Claims] 1. An end of a first extruded body provided with a pattern having a predetermined depth and an end of a second extruded body having a lower rigidity than the first extruded body and having no pattern are provided. Set the mold at intervals and perform the following processes (a), (b) and (c) simultaneously
Patterning of extruded bodies with different stiffness
How to continue. (A) A first pattern having substantially the same depth as the pattern of the first extruded body is provided.
Fill the first part of the provided mold with rubber or resin material.
Filling the first extruded body and the end of the second extruded body.
A connecting part is formed between the parts, and the surface of the connecting part is
The first pattern is transferred to the same depth as the pattern of the first extruded body.
To form a pattern. (B) a mold provided with a second pattern deeper than the first pattern
By pressing the second part of the second extruded body against the second extruded body,
A second pattern is pressed into the surface of the second extruded body to form the first pattern.
A pattern having substantially the same depth as the pattern of the extruded body is formed. (C) a depth from a depth of the first pattern to a depth of the second pattern;
The third part of the mold provided with a gradually changing third pattern
By the minute, the boundary portion between the connection portion and the second extruded body
Form a pattern with no visible boundary on the surface. 2. An insert is embedded in the first extruded body.
Inserts are embedded in the second extruded body.
The rigidity difference according to claim 1, wherein the rigidity difference is not used.
Patterning connection method of extruded body.