JPH082575B2 - Method for continuously forming extrudate having continuous grooves having different depths along the longitudinal direction - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for continuously extruding an extrudate having a plurality of types of continuous grooves having different depths from a basic forming die to form the extrudate. .

[Conventional technology]

As one of the extrudates, there is a door seal material that is attached to the periphery of the door opening of an automobile.

In the conventional door seal member 52, as shown in FIGS. 14 to 16, an upper half mounting portion 52b is arranged between two lower half mounting portions 52a, and these joint portions 54 are joined together. They are integrally joined via. The door seal member 52 includes an anchor portion 56 attached to a flange (not shown) provided on the inside of the door frame, and the anchor portion 56.
And an elastically deformable tubular seal portion 58 that is integrally formed with the door and elastically contacts the door to perform a sealing function.

A lower half mounting portion 52a and an upper half mounting portion 52b of the door seal material 52 are mounted on the lower and upper rims of the door opening on the vehicle body side, respectively.

The lower half mounting portion 52a of the door seal member 52 is mounted in combination with a decorative member (not shown) for lining and decorating the passenger compartment, and is attached to the anchor portion 56, the tubular seal portion 58 and the connecting portion thereof. Is formed of the same material as the anchor portion 56 and is provided with an insertion groove 60 into which the end portion of the decorative member is inserted.The above-mentioned portion of the upper half mounting portion 52b thereof is
Such an insertion groove 60 is not provided.

And two lower half mounting parts 52a and one upper half mounting part 5
It was joined to 2b through the joining portion 54 by die joining.

As described above, the door seal material 52 is partially combined with the decorative member and is attached to the peripheral edge of the door opening on the vehicle body side. Therefore, the two types of lower half and upper half having different cross-sectional shapes are provided. The mounting portions 52a and 52b are integrally joined together.

The conventional door seal material 52 is molded by a lower half mounting portion 52a in which an anchor portion 56, a tubular seal portion 58, and an insertion groove 60 of a connecting portion are provided, and an upper portion in which the insertion groove 60 is not provided. The half-mounting portion 52b and the half-mounting portion 52b were separately molded using two different molding dies, and the respective mounting portions 52a and 52b were bonded via the bonding portion 54 by die bonding.

Therefore, from the aspect of the molding method, it is necessary to bond the two types of mounting parts 52a, 52b that are molded separately by mold bonding, which increases the processing man-hours, which is a cause of increasing the cost of the product. .

[Problems to be Solved by the Invention]

An object of the present invention is to enable continuous molding of an extruded product having an integral structure in which a plurality of types of grooves having different depths are continuously provided along the longitudinal direction.

[Means for solving the problem]

The present invention for solving this problem is a method of continuously extruding an extrudate having a plurality of kinds of continuous grooves having different depths from a basic forming die, and the extrudate is elastically deformable. A tubular portion, and the tubular portion is provided with a solid portion that resists deformation of itself, and the depth of penetration of the groove forming tool into the solid portion is changed periodically. By doing so, the gist is to continuously provide a plurality of types of grooves having different depths in the solid portion.

[Operation of the invention]

The groove forming tool is invaded in the solid part provided in the tubular portion of the extrudate continuously extruded from the basic forming die, and the penetration depth of the groove forming tool during extrusion of the extrudate is If it is changed regularly, an extrudate having an integral structure with a plurality of types of grooves having different depths is continuously formed.

Further, by adjusting the depth of penetration of the groove forming tool into the solid portion of the tubular portion constituting the extrudate, the depth of the groove formed in the solid portion can be adjusted. The elastic resistance of the section is changed to elastically deform the tubular section to the optimum shape.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to an example in which the present invention is applied to molding of a door seal material.

FIGS. 1 to 4 show a door seal material 2 molded by the method of the present invention, and FIGS.
The figure shows a state in which the door sealing material 2 is attached to the periphery of the door opening of an automobile.

The door seal member 2 is integrally attached to the anchor portion 8 attached to the inward flange 6 (see FIG. 6 and FIG. 7) projectingly provided inside the door frame 4 on the vehicle body side. It is formed and comprises an elastically deformable tubular seal portion 10 that performs a sealing function by elastically contacting a door 21. A solid portion 10a, which serves as a resistance against elastic deformation of the tubular seal portion 10, is provided at a portion of the tubular seal portion 10 that is connected to the anchor portion 8 so as to largely inward. The anchor portion 8 is embedded with a core metal 12 for maintaining its shape, and is provided with several mounting lips 14, and the mounting lips 14 elastically contact the inward flange 6 to anchor the anchors. The part 8 is attached to the inward flange 6. The anchor portion 8 is made of semi-hard rubber,
The tubular seal portion 10 is made of soft rubber.

In this door seal material 2, a lower half mounting portion 2a and an upper half mounting portion 2b having different cross-sectional shapes are integrally formed without a joint portion.

An end portion 18 of a decorative member 16 for lining and decorating the passenger compartment is provided at a base portion (a portion connected to the anchor portion 8) of the tubular seal portion 10 in the lower half mounting portion 2a (see FIG. 6 for both).
A deep insertion groove 20 for inserting a is provided along the length direction. On the other hand, a shallow groove 32 is provided in the above portion of the upper half mounting portion 2b.

That is, a deep insertion groove 20 is provided at the base of the tubular seal portion 10 in the lower half mounting portions 2a of both ends of each of the portions that divide the door seal material 2 into three along the longitudinal direction. A shallow groove 32 is provided in the above portion of the upper half mounting portion 2b in the central portion.

The lower half mounting portion 2a of the door seal material 2 combined with the decorative member 16 is mounted on the lower half of the door opening of the automobile (the portion indicated by the alternate long and short dash line in FIG. 5). In the upper half (the part indicated by the chain double-dashed line in FIG. 5),
Since the upper half mounting portion 2b of the door seal material 2 is mounted,
The shape of the door seal member 2 mounted in the front door opening before mounting is as shown in FIG.

As shown in FIGS. 5 to 7, the anchor portions 8 of the mounting portions 2 a and 2 b of the lower half portion and the upper half portion of the door seal material 2 are both attached to the door frame 4 via the mounting lip 14. The end portion 18 of the decorative member 16 is inserted into the deep insertion groove 20 that is attached to the inward flange 6 and that is provided in the connection portion between the anchor portion 8 and the tubular seal portion 10 of the lower half mounting portion 2a.

Therefore, in the lower half of the door opening, as shown in FIG. 6, the lower half mounting portion 2a of the door seal material 2 is provided.
The base portion of the tubular seal portion 10 that constitutes the end portion of the decorative member 16 is
The tubular seal portion 10 is sandwiched decoratively, and the tubular seal portion 10 is elastically deformed when the door 21 is closed, so that the peripheral edge of the door opening portion and the close contact portion with the door 21 are sealed.

On the other hand, in the upper half of the door opening,
As shown in the figure, the upper half mounting portion of the door seal material 2
The portion of the solid portion 10a provided in the shallow groove 32 at the base of the tubular seal portion 10 forming 2b serves as elastic resistance, and the tubular seal portion 10 is elastically deformed without difficulty. As a result, the peripheral edge of the door opening and the contact portion with the door 21 are well sealed.

By providing the shallow groove 32 in the solid portion 10a of the tubular seal portion 10 constituting the upper half mounting portion 2b of the door seal material 2,
The elastic resistance of this portion is reduced to facilitate elastic deformation, and by adjusting the depth of the groove 32, the shape of the tubular seal portion 10 when elastically deformed can be finely adjusted. , So that the sealability is the highest,
The tubular seal portion 10 can be elastically deformed.

As described above, when the door seal material 2 formed by the method of the present invention is mounted on the peripheral edge of the door opening, the two types of lower half mounting portion 2a and upper half mounting portion 2b having different cross-sectional shapes are integrated. Since it is molded, the whole has the same hue, and like the conventional door seal material having a joint, the hue of the joint and other parts are slightly different,
The joint is not recognized and the appearance is not damaged.

Further, FIGS. 8 to 12 show a molding apparatus for extrusion molding the door seal material 2 having the above-mentioned integrally molded structure. Although the cross-sectional shape of the door seal material immediately after extrusion molding is different from the cross-sectional shape when the door seal material is mounted on the peripheral edge of the door opening, the same reference numerals are given and described.

A basic molding die 24 is mounted on the tip of the extrusion head 22, and a movable tie 26 is mounted on the front end surface of the basic molding die 24.

The basic molding die 24 is provided with an extrusion opening 28 (see FIG. 12) for integrally extruding both the anchor portion 8 and the tubular seal portion 10 of the door seal material 2. A pair of guide blocks 30 are bolted to the front end surface of the basic forming die 24.
The movable die 26 is fixed via 33, and is guided by the pair of guide blocks 30 to move along the direction orthogonal to the extrusion direction of the door seal material 2.

At the tip of the movable die 26, an intrusion portion 26a having a width corresponding to the width of the insertion groove 20 provided in the tubular seal portion 10 of the door seal material 2 is provided.

A drive rod 34 is attached to an upper end portion of the movable die 26, and the movable die 26 is guided by the pair of guide blocks 30 by the drive rod 34, and along a direction orthogonal to the pushing direction of the door seal material 2. It is configured to move and enter or leave the solid portion 10a of the base portion of the tubular seal portion 10.

As shown by the alternate long and two short dashes line in FIGS. 9 and 12, the penetrating portion 26 a of the movable die 26 is the solid portion 1 of the base of the tubular seal portion 10.
In the state of deeply penetrating into 0a, a part of the extrusion opening 28 provided in the basic molding die 24 is closed by the intrusion part 26a, whereby the rubber material for molding the tubular seal part 10 is released, and the tubular material is tubular. A deep insertion groove 20 is formed in the solid portion 10a of the base of the seal portion 10.

Also, as shown by the solid line in FIGS. 10 and 12,
The movable die 26 for the solid portion 10a of the base of the tubular seal portion 10
In the state where the penetration depth of the penetration part 26a is shallow, the closing part of the extrusion opening 28 is smaller than the above, and the solid part 10a of the tubular seal part 10 is smaller than the insertion groove 20. Shallow groove 3
2 is molded.

Therefore, if the penetration depth of the movable die 26 into the solid portion 10a of the base portion of the tubular seal portion 10 constituting the door seal material 2 continuously extruded from the basic molding die 24 is changed periodically, As shown in the schematic view of the figure, the lower half mounting portion 2a in which the tubular seal portion 10 is provided with the deep insertion groove 20 and the upper half mounting portion 2b in which the shallow groove 32 is provided in this portion are alternately arranged. Is molded into.

The solid portion 10a of the tubular seal portion 10 of the intrusion portion 26a of the movable die 26.
The time it takes to penetrate deeply into the solid part 10a of the tubular seal part 10 and the time it takes to penetrate deeply into the solid part 10a of the tubular seal part 10.
And the length ratio with the upper half mounting portion 2b is set, the desired door seal material 2 is continuously extruded.

〔The invention's effect〕

According to the present invention, a component tool is inserted into a solid portion provided in a tubular portion of an extrudate continuously extruded from a basic forming die, and the penetration depth of the groove forming tool is increased during extrusion of the extrudate. Because of the configuration of periodically changing the depth, an extrudate having an integral structure in which a plurality of types of grooves having different depths are continuously provided in the solid portion of the tubular portion is continuously molded.

Further, the present invention is applied to the molding of a door seal material composed of an anchor portion and a tubular seal portion, and a groove having a different depth is continuously provided in a solid portion of a base portion of the tubular seal portion to form a shallow groove. By adjusting the depth of, it is possible to finely adjust the shape when the tubular seal part is elastically deformed, and it is possible to elastically deform the tubular seal part so that the sealing performance is maximized. effective.

[Brief description of drawings]

1 to 13 are views for explaining the present invention. FIG. 1 is a perspective view of an automobile door seal member 2 molded by the method of the present invention, and FIG. The front view, FIG. 3 and FIG. 4 in a state in which the door seal material 2 is bent in the shape of the peripheral edge of the door opening are II in FIG. 2 respectively.
I-III line and IV-IV line sectional view, FIG. 5 is a side view of the automobile, FIG. 6 and FIG. 7 are VI-VI line and VII-VII line sectional view of FIG. 5, respectively. FIG. 1 is a perspective view of a molding apparatus for a door seal material according to the present invention, and FIGS. 9 and 10 show a molding apparatus in a state of molding a lower half mounting portion 2a and an upper half mounting portion 2b, respectively. A front view, FIG. 11 is a sectional view taken along line XI-XI of FIG. 9, and FIG. 12 is an extrusion opening in the basic molding die 24.
FIG. 13 is a front view of the portion 28, and FIG. 13 is a schematic plan view of the door seal material 2 that is continuously extruded. 14 to 16 are views for explaining a conventional door seal member 52, and FIG. 14 shows a lower half mounting portion 52a.
And the upper half mounting portion 52b are joined together through the joining portion 54, the conventional door seal member 52 is a front view in a state of being bent into the shape of the peripheral edge of the door opening, FIG. 15 and FIG. FIG. 14 is a sectional view taken along line XV-XV and line XVI-XVI in FIG. 14, respectively. The explanation of the reference numerals of the main parts constituting the present invention is as follows. 2: Door seal material (extrudate) 8: Anchor part 10: Tubular seal part 20: Insertion groove 24: Basic forming die 26: Movable die (groove forming tool) 28: Extrusion opening 32: Shallow groove

Claims (3)

[Claims] 1. A method of continuously extruding an extrudate having a plurality of continuous grooves having different depths from a basic forming die, the extrudate having an elastically deformable tubular portion, The tubular portion is provided with a solid portion which is resistant to deformation of the tubular portion, and is deeply penetrated into the tubular portion. By periodically changing the penetration depth of the groove forming tool into the solid portion, the solid portion is formed. A continuous molding method of an extrudate having continuous grooves having different depths in a longitudinal direction, characterized in that a plurality of kinds of grooves having different depths are continuously provided in a real part. 2. The groove forming tool is a movable die that enters and leaves the extrusion opening of the basic forming die, and the extrusion depth is changed by changing the penetration depth of the movable die into the extrusion opening. The extrudate having continuous grooves with different depths along the longitudinal direction according to claim 1, wherein a plurality of kinds of grooves having different depths are continuously provided in a solid part provided in the tubular portion of Continuous molding method. 3. The extrudate comprises an anchor part attached to an automobile frame and a tubular seal part in contact with a door, and another member is inserted into a solid part provided in the tubular seal part. The continuous groove having different depths in the longitudinal direction according to claim 1, wherein two kinds of grooves, a deep insertion groove for mounting and a shallow groove for reducing elastic resistance, are alternately provided. A method for continuously molding an extrudate having: