JP4207157B2 - Manufacturing method of long molded products - Google Patents

Description

  The present invention relates to the production of long molded articles such as automobile weather strips formed by extrusion molding, which are used for sealing between doors such as automobile doors and trunk lids and openings of vehicle bodies. Is the method. More specifically, the present invention relates to a method for manufacturing a long molded product having a metal insert inside a long molded product such as a weather strip.

  Long molded articles such as weather strips for automobiles are formed by extrusion molding with embedded inserts. In this case, after using a soft material such as synthetic rubber or thermoplastic elastomer to cover the insert by extrusion molding, in the case of synthetic rubber, it is vulcanized in a vulcanizing tank to form a continuous long molded product. Is done. Then, after filling the inside of the trim portion having a substantially U-shaped cross section of the weather strip and cutting it to a predetermined dimension, a portion corresponding to a corner portion of the vehicle body is molded by molding, and the automobile weather It becomes a product such as a strip (for example, see Patent Document 1).

  In the production of a weather strip which is an example of the long molded product, as shown in FIG. 9, first, a continuous long molded product is continuously formed by extrusion molding. That is, a long strip-shaped metal plate is punched out by an insert molding machine (not shown) to prepare a ladder-shaped insert 54 in which strip-shaped metal plates are connected by a connecting portion. The insert 54 wound around the reel is sent to the extruder 1, and the insert 54 is coated with a synthetic rubber, a thermoplastic elastomer or the like to form a trim part or a hollow seal part. Mold. Then, it transfers to the vulcanization tank 2, and heats and vulcanizes with a hot air or UHF (high frequency heating device).

  After the vulcanized and continuously formed long molded product is taken up by the take-up machine 3, the insert separator 10 separates the connecting portion of the insert 54 in order to improve the flexibility of the long molded product. The The long molded product from which the insert 54 is separated is transferred to the bending machine 120, and the trim portion 52 is bent so as to have a substantially U-shaped cross section as shown in FIG. 1 by the upper bending roller 121 and the lower bending roller 122. The long molded product that is bent is cut into a predetermined dimension for each product number. Each of the long molded products cut to a predetermined size is individually subjected to processing such as cutting of the cover lip and molding of the terminal portion in accordance with the product specifications. At this time, in order to make the dimensions of the product to be cut accurate, and to clarify the tip of the product after cutting the continuous long molded product, to facilitate the processing work performed before cutting, long molding In some cases, a notch is provided in an insert embedded in a product.

  In order to bend the trim portion 52 in which the insert 54 of the continuous long molded product is embedded in a substantially U-shaped cross section, as shown in FIG. 9, a plurality of bending rollers in which an upper bending roller 121 and a lower bending roller 122 are combined. Was used. That is, as shown in FIG. 10, a long molded product is sandwiched between the concave groove portion 121a of the upper bending roller 121 and the convex groove portion 122a of the lower bending roller 122 that are combined vertically, and the concave groove portion 121a and the convex groove portion 122a. According to the shape, the insert and the layer covering the insert are bent together.

  Since it is difficult to bend the U-shaped groove 121a at a time, the shape of the groove 121a is formed so that the grooves of many arranged bending rollers gradually become deeper. With the many bending rollers, the long molded product is gradually bent as the long molded product is transferred to form a groove (for example, see Patent Document 2). FIG. 10 is a diagram showing a combination of rollers to be bent first, and FIG. 11 is a diagram showing a combination of rollers to be bent last. The groove shape of the recessed groove portion 21a is gradually deepened.

However, in the case of bending gradually with a large number of bending rollers as described above, since the long molded product moves between the bending rollers one after another, the shape of the concave groove portion 121a and the convex groove portion 122a of each bending roller. Are different, and gradually bent without the same positioning, the position of the bent part of the long molded product does not necessarily match, and the shape of the groove of the bent long molded product is stable There was a case not to.
JP-A-6-106597 (page 3-5, FIG. 4) JP 59-188421 (2nd page, FIG. 4)

  Therefore, it has been desired to facilitate the bending process and accurately form the dimension of the groove portion of the long molded product that has been bent.

In order to solve the above-mentioned problems, the present invention of claim 1 has a metal insert inside a long molded product, and the insert is coated with a soft material by an extruder to provide a coating layer, and then In the manufacturing method of a long molded product in which the insert and the coating layer are bent by a bending machine to form a groove portion, the bending machine has two bending rollers, and the diameter of the two bending rollers is formed by bending. One bending roller is a concave roller having a concave groove portion on the outer periphery, and the other bending roller is a convex roller having a convex strip portion on the outer periphery. The protruding portion of the roller is rotatably held so as to fit into the recessed groove portion of the recessed roller,
In order to form the groove, a guide part for guiding the long molded product to the concave groove part of the concave roller is provided close to the concave roller, and the long molded product guided by the guide part is held in the concave groove part of the concave roller. Then, the long molded product held in the concave groove portion is formed by the convex roller and the concave roller being formed by forming the groove portion of the long molded product by fitting the convex strip portion of the convex roller into the concave groove portion. After the groove portion is formed, the groove portion held by the convex roller is removed from the convex strip portion with a scraper provided near the convex roller, and the long molded product is transferred to the work holder, and the outer periphery is a long molded product. It is configured to have an upper roller that has a slightly concave shape at the center so that it can be pressed, and a lower roller that has a cross section formed in a mountain shape so that it can hold the folded groove. Long shaped products with a workpiece holding machine Holding transferred to the work crimping machine,
A method for producing a long molded product, characterized in that a groove portion of a long molded product transferred from a workpiece holder is further bent into a substantially U-shaped cross section by a workpiece caulking machine .

  According to the first aspect of the present invention, in the manufacturing method of the long molded product in which the insert and the coating layer are bent by the bending machine to form the groove portion, the bending machine has two bending rollers having a large diameter. By simply combining the bending rollers, the insert and coating layer can be bent at one time to form a groove, and it is possible to form a groove rather than dividing it in several steps with multiple bending rollers. The shape can be stabilized.

  The diameter of the bending roller is 8 times or more larger than the depth of the groove of the long molded product to be bent, so the outer circumference of the bending roller is sufficiently longer than the depth of the groove, and the long molded product is When bending is performed, the length of the bending process between the bending rollers is increased, and the groove can be formed by only one bending process using a combination of two bending rollers.

One bending roller is a concave roller having a concave groove portion on the outer periphery, and the other bending roller is a convex roller having a convex portion on the outer periphery, and the convex strip portion of the convex roller fits into the concave groove portion of the concave roller. By rotating the convex roller and the concave roller between the convex strip portion of the convex roller and the concave groove portion of the concave roller, sandwiching the insert of the long molded product and its coating layer, It is possible to easily form the groove of the long molded product by sandwiching the long molded product one after another.
In order to form the groove part, a guide part for guiding the long molded product to the concave groove part of the concave roller is provided close to the concave roller. As the roller rotates, the long molded product can be moved to the correct position of the portion where the concave groove portion and the convex stripe portion mesh with each other, and the groove portion can be reliably formed at the accurate position by the concave groove portion and the convex stripe portion.

When forming the groove of the long molded product, the long molded product is held in the concave groove of the concave roller, and the long molded product held in the concave groove is placed in the concave groove of the convex roller. Insert and form a groove. For this reason, first, the long strip is inserted into the groove to form the groove of the long molded product according to the shape of the groove, and then the groove is held by the convex strip. The scaled product can be pulled by the rotation of the convex roller. By rotating the convex roller, the long molded product can be moved, and the groove portion of the long molded product can be continuously formed at the fitting portion of the concave groove portion and the convex strip portion sequentially.
After forming the groove part of the long molded product with the convex roller and the concave roller, the groove part held by the convex roller is removed from the convex part with the scraper provided near the convex roller, and the long molded product is a workpiece holding machine In order to transfer to a long molded product with a groove portion formed by a groove portion and a ridge portion, the convex roller rotates with the groove portion held by the ridge portion. Thus, the groove of the long molded product can be removed, and the long molded product can be reliably transferred to the next processing step.
The cross section is formed in a mountain shape so that the outer roller can hold a long molded product, and the upper roller has a slightly recessed shape at the center and the folded groove can be held. In order to hold the long molded product with a work holding machine configured to have a lower roller and transfer it to the work caulking machine, sandwich the long molded product with the groove folded between the upper roller and the lower roller, The posture of the long molded product can be correctly held, and the weather strip can be sent to the workpiece caulking machine in the correct posture.
The groove formed by the convex roller and the concave roller is slightly opened on the opening side of the groove due to the elasticity of the insert, because the groove of the long molded product transferred from the workpiece holder is further bent into a substantially U-shaped cross section by the workpiece crimping machine. However, it can be further bent by a work caulking machine and bent into a substantially U-shaped cross section. Since the groove portion formed by the convex roller and the concave roller is considerably bent, the work caulking machine only bends it from both sides, so that it is possible to efficiently perform bending with a substantially U-shaped cross section. Further, the bent portion of the groove portion is bent at a fixed location, and the bending position of the groove portion is not varied by the work caulking machine.

The present invention of claim 2 is a method for producing a long molded product in which the convex roller and the concave roller are installed so as to be movable in order to adjust the positions of the convex strip portion and the concave groove portion.

In the present invention of claim 2 , the convex roller and the concave roller are movable to adjust the position of the convex ridge portion and the concave groove portion relative to each other. When it is changed, the convex roller and the concave roller can be moved forward and backward relative to the shape of the groove to be formed, and can be shifted laterally. It can be formed with one bending machine. Therefore, when the type and specification of the long molded product are different, preparation for changing the bending machine can be performed in a short time, and the efficiency is high.

The present invention of claim 3 is a method for producing a long molded product in which the bending machine is provided with an impact absorbing device for relaxing the tensile force of the long molded product at an entrance for taking in the long molded product.

In the third aspect of the present invention, since the bending machine is provided with an impact absorbing device for relaxing the tensile force of the long molded product at the entrance for taking in the long molded product, the long molded product is bent by the concave roller and the convex roller. Sometimes it absorbs the impact on the long molded product, and even during bending of the insert and coating layer of the long molded product, the bending machine and insert separator, extrusion molding machine, vulcanized tank long molded product Even when the transfer speed varies, it is possible to absorb the impact and tension change applied to the long molded product.

The present invention of claim 4 is a method for producing a long molded product, wherein the long molded product is a weather strip that seals the periphery of the opening of an automobile.

According to the fourth aspect of the present invention, since the long molded product is a weather strip that seals the periphery of the opening of the automobile, the trim portion embedded with the metal insert of the weather strip can be bent and trimmed. The part can have a substantially U-shaped cross section. The gripping force of the trim part can be increased by the metal insert embedded in the trim part, and the trim part having a substantially U-shaped cross section can be firmly gripped on the door of the automobile or the flange of the opening. A weather strip can be attached to the curved portion along the curve.

  In the present invention, since the diameter of the bending roller is sufficiently larger than the depth of the groove of the long molded product to be bent, the length of the outer periphery of the bending roller is sufficient to form the groove. Thus, the groove can be formed by only one bending process. Since the convex strip portion of the convex roller is rotatably held so as to fit into the concave groove portion of the concave roller, the groove portion of the long molded product can be easily formed by the rotation of the concave roller and the convex roller.

An embodiment of the present invention will be described with reference to FIGS. The present invention will be described by taking an automobile weather strip as an example, but it can also be used for a long molded product formed by other extrusion molding.
FIG. 1 is a cross-sectional view of an automotive weather strip 50 manufactured by the manufacturing method of the present invention. The weather strip 50 is provided on the upper surface of a weather strip main body 51 and a trim portion 52 which are formed of a trim portion 52 having a substantially U-shaped cross section and a hollow seal portion 58 projecting outward from the trim portion 52 and a cover lip 53 which will be described later. The decorative layer 57 is formed.

The trim portion 52 has a substantially U-shaped cross section, an insert 54 is embedded therein, and a cover lip 53 extending toward the vehicle interior side is provided at an upper portion. The cover lip 53 may be partially cut off at a predetermined location. The insert 54 increases the rigidity of the trim portion 52 and can be firmly attached to the body or the flange of the door. As will be described later, the insert 54 is separated at its connecting portion, and the flexibility of the weather strip 50 is enhanced while maintaining the gripping force of the trim portion 52. A plurality of vehicle outer side holding lips 55 and one vehicle inner side holding lip 56 are provided on the inner surface of the trim portion 52 having a substantially U-shaped cross section. A flange of a door or a vehicle body opening edge is inserted into the trim portion 52 and held by the vehicle outer side holding lip 55 and the vehicle inner side holding lip 56, and the weather strip 50 is mounted.
The trim portion 52 is formed of a solid material or a fine foam material such as rubber, thermoplastic elastomer or soft synthetic resin, and the hollow seal portion 58 is configured of a sponge material such as rubber or thermoplastic elastomer.

A decorative layer 57 is fixed to the upper surface of the trim portion 52 and the upper surface of the cover lip 53 as a covering layer. Since the upper surface of the trim portion 52 and the upper surface of the cover lip 53 can be seen from the inside of the vehicle, the decorative layer 57 needs to change its color according to the color of the interior of the automobile in design. A decorative layer 57 having the following colors is used.
Note that the decoration layer 57 may be configured by a solid material or a fine foam material such as an elastomer or a soft synthetic resin, or may be configured by adhering a fabric.

Next, a method for manufacturing the weather strip 50 will be described.
FIG. 2 is a schematic diagram of the manufacturing process of the weather strip 50. In producing the weather strip 50, first, a continuous long molded product before being cut into a predetermined size is continuously formed by extrusion. Prior to this extrusion, the insert 54 is first manufactured.
The insert 54 is manufactured by inserting a long strip-shaped metal plate into an insert molding machine (not shown) or the like, and punching or rolling the strip-shaped metal plate into a necessary shape as the insert 54.

For example, as shown in FIG. 3 (a), a plurality of strip portions 54c, which are strip-shaped metal plates, are arranged in the width direction, and a fish bone-shaped insert 54 in which the centers of the strip portions 54c are connected by a connecting portion 54d, It can be obtained by punching a strip-shaped metal plate.
Further, as shown in FIG. 3 (b), a strip-shaped metal plate is punched into an oval shape in the width direction to provide a strip portion 54c, and a ladder shape in which connecting portions 54d are provided at both ends of the strip portion 54c. The insert 54 can also be manufactured.

Further, as shown in FIG. 3 (c), a strip-shaped metal plate is provided with a large number of slits while leaving a part in the width direction, and a strip portion 54c and a connecting portion 54d are provided by rolling a portion where no slit is provided. A ladder-like insert 54 can also be manufactured.
Further, as shown in FIG. 3 (d), a ladder-like insert 54 provided with a strip 54c and a connecting part 54d can be manufactured by punching a strip-shaped metal plate into a ladder.

  Next, the insert 54 manufactured as described above is sent to the extrusion molding machine 1 in the same manner as in the prior art, and the insert 54 is coated with synthetic rubber, thermoplastic elastomer, etc., and the trim portion 52 and the hollow seal portion 58 are formed. Then, the weather strip 50 is formed. Then, it transfers to the vulcanization tank 2, and heats and vulcanizes with a hot air or UHF. The trim portion 52 is preferably formed of a solid material, and the hollow seal portion 58 is preferably formed of a sponge material.

After the vulcanized continuous long molded product is taken up by the take-up machine 3, the connecting portion 54d of the insert 54 is separated by the insert separator 10 in order to improve the flexibility of the long molded product. The insert separator 10 passes a long molded product in a zigzag shape between a plurality of upper rollers 11 and lower rollers 12, and repeatedly bends the long molded product to separate the inserts 54.
As will be described later, the long molded product from which the insert 54 has been separated is transferred to a bending roll machine 20 (bending machine), and the trim portion 52 is bent into a substantially U-shaped cross section as shown in FIG. The folded weather strip 50 is subjected to processing such as cutting and end mold forming as described in the prior art, and the weather strip 50 becomes a product.

Next, a method of bending the trim portion 52 of the weather strip 50 into a U-shaped cross section will be described with reference to FIGS.
FIG. 4 is a front view of the bending roll machine 20. The bending roll machine 20 includes a concave roller 21 and a convex roller 22, and the concave roller 21 and the convex roller 22 bend the trim portion 52 of the weather strip 50 into a U-shaped cross section. That is, the concave roller 21 has a concave groove portion 21a on its outer periphery as shown in FIG. 6, and the convex roller 22 has a convex strip portion 22a on its outer periphery as shown in FIG.

The concave roller 21 and the convex roller 22 are rotated by a motor (not shown). The concave roller 21 is movably attached in a direction approaching or moving away from the convex roller 22 (in FIG. 4, the horizontal direction of the paper surface) by the concave roller position adjuster 21b.
The convex roller 22 is movably attached in a direction shifted laterally with respect to the concave roller 21 (in FIG. 4, the direction perpendicular to the paper surface) by the convex roller position adjuster 22b. For this reason, the concave roller 21 and the convex roller 22 can adjust a relative position and a space | interval of mutual by the thickness and width | variety of the trim part 52 of the weather strip 50 to be bent.

An arcuate guide portion 21 c is provided so as to cover the outer periphery of the concave roller 21 from the lower portion of the concave roller 21 to the fitting portion with the convex roller 22. As shown in FIG. 5, the weather strip 50 enters between the guide portion 21c and the concave roller 21, and the weather strip 50 moves by being guided by the guide portion 21c.
The concave roller 21 is attached to the concave roller rotating shaft 21d with a set screw 21e. When the specifications of the weather strip 50 are changed, the set screw 21e can be removed and the concave roller 21 can be replaced.

As shown in FIG. 6, the convex roller 22 is attached so that the convex strip portion 22 a fits into the concave groove portion 21 a of the concave roller 21. Similarly to the concave roller 21, the convex roller 22 is attached to the convex roller rotating shaft 22d with a set screw 22e. When the specifications of the weather strip 50 are changed, the set screw 22e can be removed and the convex roller 221 can be replaced.
A scraper 23 is attached to the convex roller 22 in the vicinity of the outer periphery where the convex roller 22 is rotated from the fitting portion with the concave roller 21. This scraper 23 can peel the trim part 52 of the weather strip 50 in which the convex strip part 22a of the convex roller 22 is inserted from the convex strip part 22a.

A workpiece holder 24 is provided beside the convex roller 22. As shown in FIG. 7, the work holding machine 24 includes an upper roller 24a and a lower roller 24b. The upper roller 24a has a shape in which the center is slightly recessed so that the outer periphery can press the weather strip 50. The lower roller 24b is formed in a mountain shape in cross section so that the folded trim portion 52 can be held.
Therefore, the weather strip 50 in which the trim portion 52 is bent is sandwiched between the upper roller 24a and the lower roller 24b, so that the posture of the weather strip 50 can be correctly held, and the weather strip 50 can be held in the correct posture. It can be sent to the work caulking machine 25.

A work caulking machine 25 is provided beside the work holding machine 24. As shown in FIG. 8, the work crimping machine 25 includes two rollers, a right roller 25a and a left roller 25b. The right roller 25a and the left roller 25b hold the weather strip 50 on their respective sides.
The right roller 25a and the left roller 25b can accommodate the hollow seal portion 58 and the cover lip 53 of the weather strip 50 in the groove portions, respectively, and the right roller 25a and the left roller 25b from both sides of the trim portion 52 from the side. The trim part 52 can be made into a substantially U-shaped cross section.

  A dancer 26 is provided at the entrance of the bending roll machine 20 where the weather strip 50 is introduced. The weather strip 50 is guided by a roller provided at the tip of the dancer 26. When the weather strip 50 is mounted on the bending roll machine 20 by the dancer 26, the bending roll machine 20, the insert separator 10, the extrusion molding machine 1, and the vulcanizing tank even during the bending of the trim portion 52 of the weather strip 50. Even when the transport speed of the second weather strip 50 varies, it is possible to absorb an impact or a change in tension applied to the weather strip 50.

Next, a method for bending the insert 54 of the weather strip 50 will be described.
In order to attach the weather strip 50 in which the insert 54 is embedded in the trim portion 52 to the bending roll machine 20, first, the weather is interposed between the concave groove portion 21 a and the guide portion 21 c of the concave roller 21 via the dancer 26. Insert the strip 50. As the concave roller 21 rotates, the weather strip 50 is guided by the guide portion 21c and enters between the concave roller 21 and the convex roller 22 as shown in FIG.

  Therefore, as shown in FIG. 6, the ridge 22a of the convex roller 22 pushes the trim portion 52 of the weather strip 50 into the concave groove portion 21a of the concave roller 21, and bends the trim portion 52 into the shape of the concave groove portion 21a. Since the diameters of the concave roller 21 and the convex roller 22 are sufficiently large, the length bent by the concave roller 21 and the convex roller 22 becomes long, and the trim portion 52 can be sufficiently bent by one bending.

In addition, in order to adjust the space | interval of the protruding item | line part 22a and the concave groove part 21a according to the thickness and dimension of the weather strip 50, the concave roller 21 is made the same as the moving direction of the weather strip 50 by the concave roller position adjuster 21b. Can be moved in any direction. Further, in order to adjust the bending position of the trim portion 52, the convex roller 22 can be moved in a direction perpendicular to the moving direction of the weather strip 50 by the convex roller position adjuster 22b.
When the trim portion 52 is bent, the side walls on both sides of the trim portion 52 are held by the ridge portion 22a with the ridge portion 22a interposed therebetween. Therefore, as the convex roller 22 rotates, the weather strip 50 moves with the outer periphery of the convex roller 22 and reaches the scraper 23.

  The weather strip 50 held by the ridge 22a is separated from the ridge 22a by the scraper 23 and reaches the workpiece holder 24. At this time, the trim portion 52 of the weather strip 50 is not completely U-shaped in cross section, and has a shape in which the opening is slightly expanded. Further, it is slightly wider than the groove shape bent by the elasticity of the insert 54. However, the bent U-shaped bent corner portion that is bent is surely bent and the groove shape does not vary.

  Next, the weather strip 50 is sent to the work crimping machine 25, and the side walls on both sides of the trim portion 52 are pressed and bent by the left and right rollers 25a, 25b of the work crimping machine 25. By this work caulking machine 25, the cross section is surely formed in a U shape.

It is a cross-sectional shape of the weather strip for motor vehicles manufactured by the manufacturing method of embodiment of this invention. It is a schematic diagram of the process of extruding a weather strip in the manufacturing method of the embodiment of the present invention. It is a perspective view of an insert used for a manufacturing method of an embodiment of the invention. It is a front view of the bending machine used for the manufacturing method of an embodiment of the invention. It is sectional drawing of the part in which a weather strip is located between a concave roller and a guide part in the bending machine used for the manufacturing method of embodiment of this invention. It is sectional drawing of the part by which a weather strip is bent by a concave roller and a convex roller in the bending machine used for the manufacturing method of embodiment of this invention. In the bending machine used for the manufacturing method of embodiment of this invention, it is sectional drawing of a workpiece holding machine. In the bending machine used for the manufacturing method of embodiment of this invention, it is sectional drawing of a workpiece caulking machine. It is a schematic diagram of the process of extruding the conventional weather strip. It is sectional drawing of the first bending roller of the bending machine used for the conventional manufacturing method. It is sectional drawing of the last bending roller of the bending machine used for the conventional manufacturing method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Bending machine 21 Concave roller 21a Concave groove part 22 Convex roller 22a Convex part 23 Scraper 24 Work holding machine 25 Work crimping machine 26 Dancer 50 Weather strip 52 Trim part 54 Insert

Claims (4)

The long molded product has a metal insert, and the insert is coated with a soft material by an extrusion molding machine to provide a coating layer, and then the insert and the coating layer are bent by a bending machine to form a groove portion. In the manufacturing method of the long molded product to be formed, the bending machine has two bending rollers, and the diameter of the two bending rollers is larger than the depth of the groove portion of the long molded product formed by bending. More than 8 times larger, one bending roller is a concave roller having a concave groove portion on the outer periphery, and the other bending roller is a convex roller having a convex strip portion on the outer periphery. In order to form the groove part, the guide part for guiding the long molded product to the concave groove part of the concave roller is provided close to the concave roller so as to fit in the concave groove part. Guided to The long molded product is held in the concave groove portion of the concave roller, and the long molded product held in the concave groove portion is fitted into the concave groove portion by the projecting ridge portion of the convex roller. After forming the groove portion of the long molded product with the convex roller and the concave roller, the groove portion held by the convex roller is formed with a scraper provided near the convex roller. The upper roller has a slightly recessed center so that the outer periphery can be transferred to the work holder and the outer periphery can hold the long molded product, and the bent groove portion. A workpiece holding machine configured to have a lower roller whose cross section is formed in a mountain shape so that the workpiece can be held and transferred to a workpiece crimping machine, and the workpiece holding machine Transferred from A groove of the elongated shaped articles with a work crimper further method for producing a long molded article, characterized in that bent substantially U-shaped section. The method for producing a long molded product according to claim 1, wherein the convex roller and the concave roller are movably installed to adjust the positions of the convex ridge and the concave groove. The bending machine, the entrance to capture the long molded article, the manufacturing method of a long molded article according to claim 1 or claim 2 provided with a shock absorbing device to relieve the tension of the elongate article. The method for producing a long molded product according to any one of claims 1 to 3 , wherein the long molded product is a weather strip that seals a periphery of an opening of an automobile.

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