JP3002048B2 - Weather strip and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip mounted on the periphery of a door opening of a vehicle body of a door opening type automobile and a method of manufacturing the same.

[0002]

2. Description of the Related Art In a conventional door opening type automobile, a door weather strip (hereinafter, simply referred to as a "weather strip") mounted on the above-mentioned portion is, as shown in FIGS. The first weather strip portion W ₁ ′ mounted on the upper portion and the second weather strip portion W ₂ ′ mounted on the upper half portion are separately extruded and bent into predetermined shapes. , At two locations (the portions are indicated by the symbol “D”). The first weatherstrip portion W ₁ ′ is formed by integrally forming a tubular seal portion 33 on an anchor portion 32 having a U-shaped cross section in which a tongue piece 31 is integrally provided,
The second weatherstrip portion W ₂ ′ includes only an anchor portion 32 having a U-shaped cross section and a tongue piece 31 provided integrally.
For this reason, an apparatus for separately molding two types of weather strips is required, and at the same time, two weather strips must be joined together in one weather strip.

[0003]

An object of the present invention is to provide a method for extruding a weatherstrip by continuously extruding a portion in which a tubular seal portion is integrally formed with an anchor portion and a portion consisting of only an anchor portion. It is an object of the present invention to continuously form a weather strip to be mounted on a periphery of an opening on a vehicle body side of a door opening type automobile.

[0004]

In order to solve this problem, the present invention employs a method of continuously extruding an anchor portion from a forming die, and simultaneously setting a forming position of a tubular seal portion in a width direction of the anchor portion. In a state where the tubular seal portion is continuously extruded and the molded position of the tubular seal portion is gradually displaced along the width direction of the anchor portion and is molded, the tubular seal portion is separated by the separation roller. Cutting the part and sealing the cut part at the same time.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the principle of a method for manufacturing a weather strip according to the present invention will be described with reference to FIGS. As shown in FIGS. 4 and 5, the separation roller 2 and the receiving roller 3 are arranged immediately above and below the forming die 1. The configuration in which the anchor portion Wa formed from a semi-hard material and the tubular seal portion Ws formed from a soft material are integrally extruded from the forming die 1 is the same as the conventional forming die. However, the forming position of the tubular seal portion Ws in the width direction of the anchor portion Wa can be changed. In other words, the position of the extrusion port for forming the anchor portion Wa is constant, but the position of the extrusion port for forming the tubular seal portion Ws changes. Also, as shown in FIGS. 1, 4, 6, and 7, respectively, the anchor portion Wa
Is pushed out in the width direction in a state where the portion 4 to be cut is integrally formed, and the portion of the cutting line L is separated by the separation roller 2.
By cutting the to-be-removed part 4 by
The necessary width S is secured. As shown in FIGS. 2 and 3, a core metal 5 is buried in the anchor part Wa extruded from the forming die 1, and a separation notch 6 is provided in a part of the cutting line L on the back surface of the anchor part Wa. Is molded.

When the tubular seal portion Ws is integrally extruded at a predetermined position in the width direction of the anchor portion Wa and is continuously extruded, the separation roller 2 immediately after extrusion pushes the cutting line L of the anchor portion Wa. Is cut off,
The to-be-removed part 4 is removed. Thereby, the anchor portion W
A first weatherstrip portion W ₁ (see FIGS. 8 and 9) in which the tubular seal portion Ws is integrally formed with a is formed. A receiving roller 3 is disposed immediately below the separation roller 2, and the receiving roller 3 causes the tubular seal portion W to be disposed.
Since s is supported, cutting of the anchor portion Wa by the separation roller 2 is reliably performed. In the molding state of the _first weatherstrip part W1, the molding position of the tubular seal part Ws in the width direction of the anchor part Wa is determined by the cutting line L.
When the tubular seal portion Ws is displaced (transferred) to the side of the portion to be cut 4 which is formed by being connected to the anchor portion Wa, the tubular seal portion Ws is sharply inclined with respect to the longitudinal direction of the anchor portion Wa. (This tubular seal portion Ws is an anchor portion W
a) (displaced along the width direction of a), and when this tubular seal portion Ws is transferred to the planned cutting portion 4 across the cutting line L, as shown in FIGS. In addition, a portion of the tubular seal portion Ws protrudes to the side of the scheduled cutting portion 4,
In addition, the tubular seal portion Ws is finally crushed and cut over the entire width by the separation roller 2 after being partially cut in a form in which the amount of protrusion gradually increases, and at the same time, the cutting is performed. The portion is integrally tightly sealed to the anchor portion Wa (see FIG. 8), and the tubular seal portion Ws disappears. In the subsequent, it consists of only the anchor portion Wa, the tubular seal portion and the second weather strip part W where Ws is not molded ₂ (see FIGS. 8 and 10) to said first weather strip portion W ₁ And formed continuously. As described above, when the forming position of the tubular seal portion Ws with respect to the width direction of the anchor portion Wa is changed at a predetermined cycle, the first weather strip portion W ₁ in which the tubular seal portion Ws is integrally formed with the anchor portion Wa (FIG. 9) and the second weatherstrip portion W ₂ (see FIG. 10) formed only of the anchor portion Wa without forming the tubular seal portion Ws.

As a result, as shown in FIG. 8, at the connection portion between the first and second weather strip portions W ₁ and W ₂ , the tubular seal portion Ws extends along the width direction of the anchor portion Wa. Displaced and molded, its width gradually narrows
Thereby, in its cross section, a wall forming a hollow part
The cross-sectional area of the wall is reduced, and the development length of the wall is short.
As a result, the cross-sectional area of the hollow portion becomes smaller.
As a result, it disappears in a sealed state at one end in the width direction of the anchor Wa. Therefore, the sealing portion 10 of the tubular seal portion Ws is located at one end in the width direction of the anchor portion Wa.
It is formed along its longitudinal direction.

FIGS. 11 to 13 show an apparatus for simultaneously forming two weather strips by applying the above-described manufacturing principle. The molding die 11 is formed with an extrusion molding opening 17 for extruding the two anchor portions Wa in parallel and in a connected state, and a shutter 18 is provided above the molding opening 17 with a shutter 18. W
This shutter 1 is mounted movably in the width direction of
8 is an extrusion opening 19 for extruding the tubular seal portion Ws.
Are formed. Also, on the front surface of the forming die 11, 2
Hollow shape reversing guides 20 are fixedly provided at symmetrical positions with respect to the connection portions of the anchor portions Wa. This hollow shape reversing guide 20 moves the shutter 18 to
When the position of the extrusion molding port 19 of the formed tubular seal portion Ws is changed and the tubular seal portion Ws is extruded therefrom, this is a member for making the cross-sectional shape symmetrical. By providing the hollow shape reversing guide 20, two weather strips can be simultaneously formed. A receiving roller 13 for supporting the left and right anchor portions Wa from below and a separating roller 12 for cutting and separating the connection portion between the left and right anchor portions Wa are provided in front of the forming die 11. It is arranged.

When the shutter 18 is moved to a position where the shutter 18 is positioned at the left moving end and the tubular seal portion Ws is integrally formed with the left anchor portion Wa and extruded, the shutter 18 is moved. The tubular seal portion Ws extruded from the extrusion port 19 passes through a connection portion between the left and right anchor portions Wa, and becomes a right anchor portion W.
Then, the process proceeds to step a and is integrally formed. Tubular seal Ws
When passing through the connecting portion of the left and right anchor portions Wa, the tubular seal portion Ws is crushed and cut by the separation roller 12 according to the above-described principle, and at the same time, the cut portion is attached to both anchor portions Wa. They are integrally adhered and sealed (the ends of the tubular seal portions Ws integrally formed with the left and right anchor portions Wa are all sealed). The cross-sectional shape of each tubular seal portion Ws formed on the left and right anchor portions Wa is symmetric with respect to the connection portion of each anchor portion Wa by a pair of hollow shape reversing guides 20 fixed to the forming die 11. Therefore, two weather strips having the same shape are formed at the same time.

As described above, according to the manufacturing method described above,
Since two weather strips can be formed at the same time and there is no cutout, there is an advantage that resources can be effectively used.

[0011]

As described above, according to the present invention, when the weather strip is extruded, the sealing portion of the tubular seal portion is formed at one end in the width direction of the anchor portion along the longitudinal direction. In this state, the part in which the tubular seal part is integrally molded with the anchor part and the part consisting only of the anchor part can be continuously extruded, so that it is attached to the periphery of the opening on the vehicle body side of the door opening type automobile. The weatherstrip can be continuously formed. As a result, when mounting on an automobile, the terminals of one weatherstrip need only be mold-joined, and only one mold joint is required. In addition, two weather strips of the same shape in which a portion in which the tubular seal portion is integrally formed in the anchor portion and a portion formed only of the anchor portion are continuously formed without forming any cut portion are simultaneously formed. This makes it possible to use resources effectively and at the same time to increase the efficiency of extrusion molding.

[Brief description of the drawings]

FIG. 1 is a plan view of an extruded product in which a scheduled cutting portion 4 is integrally formed.

FIG. 2 is a sectional view taken along line A ₁ -A ₁ of FIG.

FIG. 3 is a sectional view taken along line B ₁ -B ₁ of FIG. 1;

FIG. 4 is a cross-sectional view illustrating a crushed state of the tubular seal portion Ws at a portion along line X ₁ -X _{1 in} FIG. 1;

FIG. 5 is a side view in the state of FIG. 4;

FIG. 6 is a cross-sectional view showing a state where the tubular seal portion Ws is crushed at a portion along line X ₂ -X _{2 in} FIG. 1;

FIG. 7 is a cross-sectional view showing a crushed state of the tubular seal portion Ws at a portion along line X ₃ -X _{3 in} FIG. 1;

FIG. 8 is a plan view of an extruded product from which a portion to be cut 4 is cut.

FIG. 9 is a sectional view taken along line A ₂ -A ₂ of FIG. 8;

FIG. 10 is a sectional view taken along line B ₂ -B ₂ of FIG. 8;

FIG. 11 is a front view of an apparatus for simultaneously forming two weather strips.

FIG. 12 is a side view of the same.

FIG. 13 is a sectional view taken along line YY of FIG. 11;

FIG. 14 is a schematic diagram showing a conventional weather strip mold joining portion D.

FIG. 15 is a sectional view taken along line Z ₁ -Z ₁ of FIG. 14;

FIG. 16 is a sectional view taken along line Z ₂ -Z ₂ of FIG. 14;

[Explanation of symbols]

L: the cutting line S: requires width of the anchor portion Wa: anchor portion Ws: tubular seal portion W _1: the first weather strip portion W _2: the second weather strip part 1, 11: forming die 2, 12: separation roller 3, 13: receiving roller 4: scheduled to be cut 10: sealed portion of tubular seal portion 18: shutter 20: hollow shape reversing guide

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 13/06 B29C 47/00 B29L 23:00 B29L 31:58

Claims (6)

(57) [Claims] 1. A weather strip comprising an anchor portion (Wa) and a tubular seal portion (Ws) integrally formed with the anchor portion (Wa) and performing a sealing function by elastic deformation, wherein the anchor strip (Wa) is provided. A first weather strip portion (W ₁ ) integrally formed with a tubular seal portion (Ws) and a second weather portion formed only of an anchor portion (Wa) without forming the tubular seal portion (Ws) Strip section (W
₂ ) are continuously formed, and the first and second weather strip portions (W ₁ , W ₂ ) are formed.
In the connecting portion, the tubular seal portion (Ws) is formed by being gradually displaced along the width direction of the anchor portion (Wa), and the end of the tubular seal portion (Ws) is connected to the anchor portion (Ws). (8) A weatherstrip which disappears within a width of (Wa). 2. A weather strip comprising an anchor portion (Wa) and a tubular seal portion (Ws) formed integrally with the anchor portion (Wa) and performing a sealing function by elastic deformation, wherein the anchor strip (Wa) is provided. A first weather strip portion (W ₁ ) integrally formed with a tubular seal portion (Ws) and a second weather portion formed only of an anchor portion (Wa) without forming the tubular seal portion (Ws) Strip section (W
₂ ) are continuously formed, and the first and second weather strip portions (W ₁ , W ₂ ) are formed.
The sealing portion (10) of the tubular seal portion (Ws) formed at the connection portion of (1) is formed along the longitudinal direction at the widthwise end of the anchor portion (Wa). Weather Strip. 3. A weather strip comprising an anchor portion (Wa) and a tubular seal portion (Ws) integrally formed with the anchor portion (Wa) and performing a sealing function by elastic deformation, wherein the anchor strip (Wa) is provided. A first weather strip portion (W ₁ ) integrally formed with a tubular seal portion (Ws) and a second weather portion formed only of an anchor portion (Wa) without forming the tubular seal portion (Ws) Strip section (W
₂ ) are continuously formed, and the first and second weather strip portions (W ₁ , W ₂ ) are formed.
The width of the tubular seal portion (Ws) gradually narrows at the connecting portion, and the end portion of the tubular seal portion (Ws) disappears within the width of the anchor portion (Wa). Weather Strip. 4. A weather strip comprising an anchor portion (Wa) and a tubular seal portion (Ws) formed integrally with the anchor portion (Wa) and performing a sealing function by elastic deformation, wherein the anchor portion (Wa) is provided. A first weather strip portion (W ₁ ) integrally formed with a tubular seal portion (Ws) and a second weather portion formed only of an anchor portion (Wa) without forming the tubular seal portion (Ws) Strip section (W
₂ ) are continuously formed, and the first and second weather strip portions (W ₁ , W ₂ ) are formed.
In the connecting portion, said tubular seal portion (Ws) is its
In the cross section of the wall forming the hollow part
And the deployment length of the wall becomes short.
As a result, the cross-sectional area of the hollow portion becomes smaller and disappears.
Weatherstrip, characterized by that. 5. A tubular seal portion (W) is attached to an anchor portion (Wa).
s) is integrally formed with the first weatherstrip portion (W ₁ ), and the second sealing portion (Ws) is not formed, and the second weatherstrip portion (W ₂ ) is formed only of the anchor portion (Wa). ) Is a method for producing a weatherstrip, wherein the anchor portion (Wa) is continuously extruded from the forming die (1) and the tubular seal portion in the width direction of the anchor portion (Wa). The forming position of (Ws) can be changed, and the tubular seal portion (Ws) is continuously extruded. The forming position of the tubular seal portion (Ws) is gradually increased along the width direction of the anchor portion (Wa). A method of manufacturing a weatherstrip characterized in that the tubular seal portion (Ws) is cut by a separation roller (2) in a state of being displaced and molded, and the cut portion is sealed at the same time. Law. 6. The anchor portion (Wa) is continuously extruded in a state in which a portion to be cut (4) is integrally formed on the side thereof, and is to be cut by a separation roller (2). In a state in which the tubular seal portion (Ws) is cut, the forming position of the tubular seal portion (Ws) is gradually displaced along the width direction of the anchor portion (Wa). 6. The method according to claim 5, wherein the portion to be cut (4) of the anchor portion (Wa) is cut off simultaneously.