JP3212054B2 - Automotive weather strip and method of manufacturing the same - 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 for an automobile mounted on a body panel of an automobile and a method of manufacturing the same.
About the law .

[0002]

2. Description of the Related Art Generally, various weather strips are mounted on a body panel of an automobile. For example, a window molding is attached to an outer peripheral edge of a window glass disposed at a window opening of a vehicle body panel, and a door molding is attached to an outer peripheral edge of a door panel.
Such various weather strips have a mounting portion to be mounted on the vehicle body panel side and a lip portion extending from the mounting portion. Whereas the mounting portion is formed from a hard resin material, the lip portion is usually
It is formed from a foam such as a sponge.

[0003] The weather strip for automobiles as described above is generally formed by extrusion, but is subjected to a vulcanization treatment by heating after extrusion.
In this vulcanization step, the lip portion expands and expands, and is formed into a predetermined elasticity.

[0004]

However, in such a weatherstrip having a lip portion made of a foam, the lip portion may be formed in a wavy state due to foaming and expansion of the lip portion during vulcanization. is there. This waving phenomenon tends to be greater at the tip of the lip, so that it is difficult to form a weather strip having a wider and longer lip.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a weather strip for an automobile which can be formed into a proper shape without causing waving even with a wide and long lip portion. I do.

[0006] The present invention may be a wide longer lip, Rutotomoni can be satisfactorily molded with original shape without causing waviness, cutting the unnecessary lip
Formation of lines, and an object of the invention to provide a weather strip and its manufacturing method for an automobile <br/> was so that it is possible to satisfactorily carry out the stripping operation.

[0007]

In order to achieve the above object, a weatherstrip for an automobile according to the present invention is provided with a mounting portion mounted on a vehicle body panel and a mounting portion connected to the mounting portion .
A sealing portion, and a lip portion formed of a foam extending in a predetermined direction, wherein the sealing portion is pressed against the vehicle body panel.
In the automotive weather strip which seals by the above, in the lip portion , a core made of a hard non-foamed body
The shape retainer as a material is embedded,
Shape maintaining member, the end portion of the shape maintaining member is of the lip
It is arranged so as to be exposed from the extension tip and has this shape
Extension width dimension of the extension tip of the lip where the holding body is exposed
The method has a configuration that varies along the longitudinal direction .

[0008] Further , an automobile weathers according to the present invention.
In the manufacturing method of the trip, the
Attachment part, a seal part joined to the attachment part, and a predetermined direction.
And a lip made of foam extending to the
The seal is performed by pressing the
The automobile weatherstrip is extruded using an extruder.
Of automotive weatherstrips
In the manufacturing method, a hard non-foamed
Extrusion while embedding a shape holder as a core material consisting of
While shaping, on the surface corresponding to the buried position of the shape holder
Press the movable blade, and move the movable blade to the extension width of the lip.
By reciprocating in the direction
On the surface, in the width direction along the length of the weatherstrip
Form a cutting line that changes position and is unnecessary along the cutting line
By removing the portion, the extending tip of the lip portion
The shape holder is exposed while the shape holder is exposed from
The extension width dimension of the extension tip of the lip
-A method that varies along the length of the strip.
The cutting line does not exceed the width dimension of the shape holder.
It is provided within the range.

[0009]

The vehicle according to the present invention having such a configuration is described.
In a weatherstrip for use, even if foaming and expansion occurs in the lip portion due to vulcanization, the lip is formed by a rigid non-foamed shape holder arranged so as to be exposed from the leading end in the width direction of the lip portion. The shape of the part is firmly held in its original shape, and deformation such as waving does not occur ,
On the tip of the lip made of foam, which tends to be uneven,
A non-foamed shape holder with a rigid smooth surface is exposed.
The above-mentioned lip, which has changed in the longitudinal direction.
The tip of the loop portion has a good appearance .

Further , the end of the shape holder is extended from the lip.
The configuration to be exposed from the tip portion is, for example, the shape holder
Insert a cutting line into the lip within the width of
And strip off the unnecessary part on the tip side along the cutting line.
Can be obtained by removing unnecessary parts.
When cutting, be sure to cut
Since the entire length of the broken part is well maintained,
Flexible lip made of foam cuts in unexpected directions
Very good without causing problems such as
It is possible to perform stripping work favorably.

[0011] Further , an automobile weathers according to the present invention.
In the trip manufacturing method, a movable blade is pressed against the lip.
The lip to keep the shape
From being satisfactorily held by bearing member, position the movable blade
When moving the movable blade, the
It is possible to prevent the situation such as deforming the loop part well.
Swelling.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. First, the present invention shown in FIGS.
The weatherstrip 1 having the light basic structure is mounted on an outer peripheral portion of a window glass for a sunroof of an automobile, and has the same overall cross-sectional shape. The weather strip 1 has a mounting portion 2 made of a hard resin material (solid material), and a glass insertion groove 2 a having a substantially U-shaped cross section and a panel insertion formed in the mounting portion 2. The grooves 2b are configured to be fixed to the outer peripheral edge of the unillustrated window glass and the edge of the vehicle body panel, respectively. As the hard resin material forming the mounting portion 2, for example, a hard rubber material is used.

On the other hand, the outer peripheral side of the mounting portion 2 (right side in the figure)
Is joined to a hollow seal portion 3 made of a foam such as a sponge and having a substantially circular arc cross section. This hollow seal part 3
Is for sealing by pressing against a body panel of a partner (not shown).

Further, from the hollow seal portion 3, a lip portion 4 integrally extends downward in the figure. The lip portion 4 is also formed of a foam such as a sponge, and has a relatively long constant width dimension over the entire length and has a gap.
During Ru used so as to close the. As shown in FIG. 2, a core material made of a hard non-foamed body is provided at the leading end (lower end in the drawing) of the lip portion 4 in the extending width direction.
The shape holding body 5 is embedded, and the tip of the lip portion 4 in the extending width direction is sponge,
It has a three-layer structure of solid and sponge. The shape holder 5 is formed by molding a non-foamed hard resin material such as a hard rubber material into a thin plate.
At the same time, it is extruded.

In the weather strip 1 in such an embodiment, even if the lip portion 4 expands and expands in the vulcanization step after extrusion and tries to deform, the lip portion 4 is disposed at the leading end portion in the extending width direction. By the shape holder 5,
It is firmly held in its original shape. Therefore lip part 4
Is formed in a predetermined shape without causing wavy deformation and the like as in the prior art.

1 and 2 show the basic structure of the present invention .
In the embodiment of FIG. 3 in which the same components as
In the weather strip 11, the shape retainer 15 as a core material made of a hard non-foamed material is embedded over the entire width of the lip portion 4 made of a foamed material such as sponge.
A multilayer structure similar to the above embodiment is formed. The shape holder 15 in the present embodiment is connected to the mounting portion 2 and is integrally formed. Thus, the shape holder made of a hard non-foamed body only needs to be arranged at least at the end of the lip portion 4, and the same operation and effect can be obtained regardless of the width dimension of the shape holder.

On the other hand, the extruder for forming the weather strip 11 according to the embodiment of FIG. 3 is provided with a shutter mechanism 20 as shown in FIG. The shutter mechanism 20 is provided with a movable blade 21, and a pair of edges 21 a, 21 a of the movable blade 21 as shown in FIG. Is configured to be performed. At the time of actual extrusion forming, the movable blade 21
Is reciprocated in the width direction of the lip portion 4 (vertical direction in the drawing), whereby the pressed portion of the edge portion 21 a of the movable blade 21 is appropriately changed in the width direction of the lip portion 4.

Accordingly, as shown in FIG. 6, a cut line 22 formed by the movable blade 21 is notched in the weather strip material 11 'immediately after the extrusion molding while changing the position of the cutting line 22 with respect to the lip portion 4'. . Such notch by the movable blade 21 is favorably executed by the holding action of the shape holding body 15.

Then, as shown in FIG.
After cooling , removal work such as peeling of the unnecessary portion 4'a of the lip portion 4 'is performed along the cutting line 22, and the width dimension of the lip portion 4 is changed along the longitudinal direction. I have. The stripping operation of the unnecessary portion 4'a is also performed by the shape holding member 15 '.
Is easily and satisfactorily performed, and a beautiful stripped surface is obtained. Also, if the foam is likely to be uneven
The front end surface of the lip portion 4 is made of a non-
By exposing the shape holder made of foam,
The tip of the lip that is changing in the hand direction is
It is made to be watched.

Then, the lip portion 4 is connected to each of the above-described components.
From a rigid foam such as sponge in the example
And the shape is maintained only at the tip of the lip 4.
The posture holding force of the lip part 4 due to the holding body 5 being buried
Is very small, the lip 4
Is well held by the shape holder 5,
The movable blade 21 is pressed against the lip portion 4 to form a cutting line 22.
When moving the movable blade 21 in the formation,
Situation such as deformation of the lip part 4 is well prevented.
It is supposed to be.

The lip portion 4 particularly corresponds to the cutting line 22.
The entire length of the part to be cut is distributed along the cutting line 22 without waste.
Whether it is held well by the placed shape holder 5
Then, the unnecessary portion 4 ′ of the lip portion 4 is cut along the cutting line 22.
When peeling, the flexible lip 4 is in an unexpected direction
Without causing problems such as cutting
In addition, it is possible to perform the stripping operation satisfactorily.

Although the invention made by the present inventors has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiments, and can be variously modified without departing from the gist thereof. Needless to say.

[0023]

The automobile according to the present invention as described above
Weatherstrip is the tip of the lip in the extension direction
A shape holder made of a hard non-foamed body is arranged so as to be exposed from the lip.
Even if the lip is expanded and deformed, the lip is firmly held in its original shape by the shape holder, so that the lip can be satisfactorily formed into the originally expected shape without causing wavy deformation or the like. As well as uneven
A rigid flat surface is attached to the tip of the lip
The shape holder made of non-foamed body having a smooth surface
And the tip of the lip portion changing in the longitudinal direction.
The end can have a good appearance. In particular, it is possible to form a longer lip portion having a relatively large width dimension.

Further , the lip portion has a rigidity such as a sponge.
Made of foam with small size
Since the holding body is partially buried, the posture of the lip part
Even if the holding force is extremely small,
In particular, the entire length of the part corresponding to the cutting line
The shape holders that are arranged along the
Along the cutting line
When the flexible lip is unexpected when peeling
Without causing problems such as cutting in the direction
It is possible to perform stripping work very well,
Thus, productivity can be improved.

In addition, the automotive weather according to the present invention
Strip manufacturing method, partially placed shape retention
Adjust the width of the body to correspond to the change in the position of the cutting line in the width direction.
The movable blade against the lip.
Apply the lip to the shape holder to form the cutting line
Because it is made to hold better,
When moving the movable blade, deform the lip
Can be successfully prevented,
As a result, the production quality of automotive weather strips has been improved.
Can be

[Brief description of the drawings]

FIG. 1 is a cross-sectional explanatory view showing a weather strip for a vehicle having a basic structure of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a tip portion of a lip portion of the automotive weather strip shown in FIG.

FIG. 3 is an explanatory cross-sectional view corresponding to FIG. 1, illustrating a weather strip for an automobile according to an embodiment of the present invention.

FIG. 4 is an explanatory front view showing a step of forming a cutting line in an extruded molding material in forming the automobile weather strip shown in FIG. 3;

FIG. 5 is an enlarged front view showing a portion A in FIG. 4;

FIG. 6 is an external perspective explanatory view showing a state immediately after a cutting line is formed in an extruded molding material in forming the automotive weather strip shown in FIG. 3;

FIG. 7 is an external perspective explanatory view showing a step of stripping unnecessary portions along a cutting line shown in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1,11 Weather strip 2 Attachment part 3 Hollow seal part 4 Lip part 5,15 Shape holder

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-2-34449 (JP, A) JP-A 55-134317 (JP, U) JP-A 63-47927 (JP, U) JP-A 3- 255 (JP, U) JP 5-28984 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60R 13/06 B29C 47/12 B29D 31/00 B60J 10/12

Claims (3)

(57) [Claims] 1. A mounting part (2) mounted on a vehicle body panel side.
And this mounting part (2)A seal part (3) joined to the
In a given directionA lip portion (4) made of an expanding foam;
EquippedThe seal portion (3) is pressed against the vehicle body panel.
Seal byAutomotive weather strip
In (1), the lip (4)WithinConsists of a rigid, non-foamed bodyCore material
AsThe shape holder (5)Buried, The shape holder (5) is provided with the shape holder (5). End of
Is exposed from the extended tip of the lip (4).
Arranged,And The above-mentioned hole where the shape holder (5) is exposed.
The extension width dimension of the tip of the extension (4) is
Change alongAutomotive weather characterized by the following:
strip. 2. The automobile weather strip (1) according to claim 1, wherein a lip portion (4) has a variation in a width of extension from an attachment portion (2).
The weather strip for automobiles, wherein the width dimension of the shape holder (5) changes along the longitudinal direction. (3)Mounting part to be mounted on the body panel side (2)
And a seal part (3) joined to the mounting part (2);
A lip part (4) made of a foam extending in a predetermined direction;
The seal part (3) is pressed against the vehicle body panel
Weather strip for automobiles
(1) is formed by using an extrusion molding apparatus.
In a method for manufacturing a weather strip for a vehicle, A core material made of a hard non-foamed material in the lip portion (4)
Extrusion molding while embedding the shape holder (5) as
While Movable on the surface corresponding to the embedded position of the shape holder (5)
Press the blade (21), and move the movable blade (21) to the lip.
By reciprocating in the extension width direction of the portion (4),
On the outer surface of the lip (4), a weather strip
Along the longitudinal direction Cutting line (22) whose position changes in the width direction
To form Unnecessary part (4 ') is removed along the cutting line (22).
This allows the lip (4) to be shaped from the extending tip.
The shape holder (5) is exposed while the holder (5) is exposed.
The extension width dimension of the tip of the exposed lip (4) is
How to change along the longitudinal direction of the weatherstrip
And The cutting line (22) is defined by the width of the shape holder (5).
It is characterized by being provided within the range not exceeding
Manufacturing method of weather strip for automobile.