JP2010095065A - Core, method and device for manufacturing the same and method of manufacturing extrusion mold product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core embedded in a weather strip which can prevent a disadvantage caused by a core piece which is torsionally deformed when roll-forming the core in a U shape in its cross section. <P>SOLUTION: By forming a plurality of spaces 24 at a predetermined interval in the longitudinal direction of a core raw material by punching, a core 16 in which core pieces 22 and spaces 24 are alternately provided in the longitudinal direction is formed. Prior to roll-forming the core 16 into a U shape in its cross-section, the core 16 is applied with pre-twist to torsionally and plastically deform the core pieces 22 in a particular direction (a direction opposite to a direction where the core pieces 22 are torsionally deformed by the roll-forming) in advance. Then, by torsional deformation of the core piece pieces 22 when the core 16 is roll formed into the U shape in cross section, the torsional and plastic deformation of the core pieces 22 by the pre-twist is corrected so as to make ends of the core piece parts 22 in the width direction align in a straight line in the longitudinal direction and to avoid generating differences between edges of the core pieces 22 adjacent to each other in the longitudinal direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a long core material embedded in an extruded product made of a polymer material, a manufacturing method and manufacturing apparatus for the core material, and a manufacturing method of the extruded product.

  In general, a long trim material is attached to a flange of a door opening edge or window opening edge of a vehicle such as an automobile along the flange. This trim material is extruded by a polymer material such as rubber or thermoplastic synthetic resin (including thermoplastic elastomer) into a shape having a mounting portion having a substantially U-shaped cross section. The flange of the opening edge is fixed to the flange by sandwiching it from both sides. Such a trim material is a substantially U-shaped long reinforcing core material whose cross section corresponds to the mounting portion (for example, a metal plate such as a cold rolled steel plate having a thickness of about 0.25 mm to 1.0 mm, By embedding and integrating SPCC) in the JIS display, the attachment portion is reinforced with a core material so that the attachment portion can be stably fixed to the flange at the opening edge.

  By the way, the flange of the door opening edge of the vehicle and the flange of the window opening edge are bent two-dimensionally or three-dimensionally in the longitudinal direction, so that the trim material is formed in a substantially linear shape by extrusion molding. It is bent and fitted according to the bent shape of the flange. For this reason, the core material embedded in the trim material is a variety of core materials (fish bone cores) in which a plurality of space portions are formed at predetermined intervals in the longitudinal direction so that the core material can be bent freely following the bending of the trim material. Materials and keel cores).

  As a manufacturing method of such a core material, for example, a plurality of space portions are formed at predetermined intervals in the longitudinal direction of a strip-shaped core material by pressing (punching), thereby forming a comb tooth shape in the longitudinal direction. In some cases, a core material having a shape in which a plurality of core material pieces (hereinafter sometimes simply referred to as “core material pieces”) and spaces are provided alternately is formed.

  Also, as described in Patent Document 1 (Japanese Patent Laid-Open No. 58-76343), a plurality of slits are formed by slitter roll processing at predetermined intervals in the longitudinal direction of the strip-shaped core material, and the slits A core material having a shape in which core pieces and spaces are alternately provided in the longitudinal direction is formed by rolling the unformed portion in the longitudinal direction and enlarging the slit in the longitudinal direction to form a space portion. There is also something like that.

When manufacturing an extruded product made of a polymer material in which such a core material is embedded, the core material is composed of a convex forming roller having a convex outer peripheral molding surface and a concave forming roller having a concave outer peripheral molding surface. It is roll-formed into a U-shaped cross section (for example, a U-shape that is the final cross-sectional shape or a U-shape that is an intermediate cross-sectional shape that is somewhat wider than that) by passing the gap continuously in the longitudinal direction. After bending, the polymer material is supplied while continuously supplying the core material having a U-shaped cross section to the extrusion mold for forming the extrusion molding product, and the extrusion molding product is molded and crossed over the extrusion molding product. A U-shaped core material may be embedded and integrated.
JP 58-76343 A

  However, the extrusion molded product in which the core material bent by roll forming into a U-shaped cross section is embedded, the surface of the portion in which the core material is embedded is not flat, and the surface is uneven, A part of the one part may be exposed to the outside, and the appearance (decoration) of the extruded product may be impaired.

  According to the inventors' investigation, when the core material is bent from a flat plate shape into a U-shaped cross section by roll forming, the core material pieces on both sides of the U-shaped core material move respectively. Torsional deformation in the direction of expanding toward the upstream side (the direction in which the upstream side of the moving direction of the core piece is displaced outward in the U-shaped cross section and the downstream side in the moving direction is displaced inward of the U-shaped cross section) Turned out to be. As a result of such torsional deformation of each core material piece, the width direction end of the core material piece is not straight in the longitudinal direction and a step is produced between the edges of the adjacent core material pieces. It is considered that irregularities occur on the surface of the portion where the material is embedded, or a part of the core material piece is exposed to the outside.

  The present invention has been made in view of such circumstances. Accordingly, the object of the present invention is torsional deformation of a core piece when the core is bent into a U-shaped cross section by roll forming. It is to be able to prevent problems caused by.

  In order to achieve the above object, the invention according to claim 1 is a convex forming roller in which the outer peripheral molding surface has a convex shape and is rotated at a predetermined angular velocity in one direction before being embedded in an extruded product made of a polymer material. The outer peripheral molding surface has a concave shape, and the concave forming roller rotating at the same angular velocity in the opposite direction as the convex forming roller passes in the longitudinal direction continuously from the upstream side to the downstream side of the forming roller and traverses. It is a long core material that is bent by roll forming so as to be U-shaped, and the core material is a predetermined interval in the longitudinal direction at a part of the width direction of the long strip-shaped core material. By forming a plurality of spaces by punching and leaving core pieces between adjacent spaces, the core pieces and spaces are alternately provided in the longitudinal direction and bent by a forming roller. Between the outer peripheral molding surface of the molding roller and the moving direction of the core when Therefore, by twisting and plastically deforming the core piece in the specified direction, at least one of the movement direction downstream side and the movement direction upstream side during bending of the core piece is the thickness direction of the core. A pre-twisting process is performed so as to process in a state of being displaced in the opposite direction relative to the other side.

  Thus, before the core material is bent into a U-shaped cross section by roll forming (hereinafter, sometimes simply referred to as “roll forming processing”), the core material is pre-twisted to a specific direction ( When the core material piece is twisted and plastically deformed in a direction opposite to the direction in which the core material piece portion is twisted and deformed by roll forming, the core material is then rolled into a U-shaped cross section. By twisting deformation of the core piece, the twist plastic deformation of the core piece by the pre-twisting process is offset or corrected (hereinafter referred to as “correction”) so that the width direction end of the core piece becomes a straight line in the longitudinal direction. Thus, it is possible to avoid the occurrence of a step between the edges of the core pieces adjacent in the longitudinal direction.

  As a result, when an extruded product made of a polymer material in which the core material after roll forming is embedded is produced, irregularities occur on the surface of the portion where the core material of the extruded product is embedded, It is possible to prevent a part of the piece of material from being exposed to the outside, and to improve the appearance (decoration) of the extruded product.

  In addition, since the core material piece is not exposed to the outside, the core material piece is applied to a human body or clothes such as an extrusion-molded product manufacturing worker, an assembly worker, or a user (for example, an automobile occupant who has assembled the extruded product). Without being touched or caught, safety can be improved.

  Furthermore, since it is not necessary to thicken the polymer material part of the extruded product in order to prevent the core part from being exposed, the polymer material part of the extruded product can be made thin. And the weight of the extruded product can be reduced.

  In addition, there is no step between the edges of the core piece in the longitudinal direction (the core piece is in a straight line), so when manufacturing an extruded product, the core piece in the extrusion line It is possible to prevent a peripheral member (for example, an internal component member of an extrusion mold) from being caught. For this reason, the inability to supply the core material due to the hooking of the core material piece portion does not occur, and the extruded product can be manufactured stably.

Further, since no step is generated between the edges of the core piece in the longitudinal direction (the core piece is in a straight line), the core is continuously supplied to the guide groove of the extrusion mold. The wear of the guide groove can be reduced by avoiding the material piece portion from rubbing strongly against the guide groove. For this reason, the positional relationship between the guide groove and the core material can be accurately maintained over a long period of time, and as a result, an extruded product having a stable quality with little variation in the position of the core material can be manufactured.
In the present invention, the U-shaped cross section is not strictly limited to a U-shape, and includes an open U-shape or V-shape.

  When the core material of the present invention is manufactured, as in claim 3, the core material is obtained from a material reel in which a long strip-shaped core material is continuously wound around a plurality of layers. A core material feed step for unwinding and feeding from the outer peripheral side located on the outer side in the radial direction, and adjacent space portions formed by punching a plurality of space portions at predetermined intervals in the longitudinal direction in a part of the width direction of the core material A core material forming step of forming a core material in which a core material piece portion and a space portion are alternately provided in the longitudinal direction by leaving the core material piece portion in between, and when the core material is bent by a forming roller The core material piece is twisted and plastically deformed in the direction specified by the relationship between the outer peripheral molding surface of the forming roller and the movement direction of the core material, and moved in the movement direction downstream side when the core material piece is bent. At least one of the upstream side in the direction is on the other side in the thickness direction of the core material A pre-twisting process for pre-twisting to process in a relatively reverse direction, and a radial direction when the core material is wound around the pre-twisted core material on the material reel It is preferable to execute the core material winding step of winding around the core material reel so that the outer side located on the outer side is the inner side located on the inner side in the radial direction. If it does in this way, the core material of this invention can be manufactured easily and can be made into the state wound around the reel for core materials.

  In this case, as in claim 4, in the preliminary twisting step, at least a pair of twisting rollers disposed so as to sandwich the core material from both the front and back sides are rotationally driven to sandwich the core material between the twisting rollers. You may make it perform the preliminary | twisting process of a core material piece part by moving continuously to a longitudinal direction, pressing. In this way, the core material can be continuously supplied to the twisting roller in the longitudinal direction, and the preliminary twisting can be continuously performed by the twisting roller, and the core material of the present invention can be efficiently manufactured. Can do.

  Alternatively, as described in claim 5, in the preliminary twisting step, the core material piece is pre-twisted by pressing the core material with a press die arranged so as to sandwich the core material from both the front and back sides. Anyway. In this way, a pre-twisting process can be performed by simultaneously sandwiching a number of core material pieces arranged in the longitudinal direction of the core material at once with a press die, and the core material of the present invention can be efficiently manufactured. it can.

  The apparatus for producing the core material of the present invention, as described in claim 7, radiates the core material from a material reel in which a long strip-shaped core material is continuously wound around a plurality of layers. Core material sending means for unwinding and feeding from the outer peripheral side located on the outer side in the direction, and by forming a plurality of space portions at predetermined intervals in the longitudinal direction in a part of the width direction of the core material, A core material forming means for forming a core material in which a core material piece portion and a space portion are alternately provided in the longitudinal direction by leaving the core material piece portion in between, and when the core material is bent by a forming roller The core material piece is twisted and plastically deformed in the direction specified by the relationship between the outer peripheral molding surface of the molding roller and the core material movement direction, and the core material piece is bent and moved in the downstream direction and the movement direction. At least one of the upstream side is opposite to the other side in the thickness direction of the core material Pre-twisting means for pre-twisting to process in a state displaced relatively in the opposite direction, and the outer side in the radial direction when the core material is wound around the material reel with the pre-twisted core material It is preferable to include a core material winding means for winding the core material reel so that the outer peripheral side located at the inner side is located on the inner side in the radial direction. If it does in this way, the core material of this invention can be manufactured easily and can be made into the state wound around the reel for core materials.

  Moreover, when manufacturing the extrusion molded article of the present invention, as in claim 8, a plurality of spaces are formed at predetermined intervals in the longitudinal direction in a part of the long strip-shaped core material in the width direction. Forming when the core material pieces and spaces are alternately formed in the longitudinal direction by leaving the core material pieces between the adjacent space portions formed by punching, and when being bent by the forming roller By twisting and plastically deforming the core piece in the direction specified by the relationship between the outer peripheral molding surface of the roller and the moving direction of the core, the moving direction downstream side and the moving direction upstream side when bending the core piece Is wound around a core reel in a state in which a pre-twisting process is performed so that at least one side thereof is displaced in the opposite direction relative to the other side in the thickness direction of the core material. Core that has been pre-twisted from the core reel Core material feeding step for unwinding and feeding from the outer peripheral side located radially outward, and core material that has been pre-twisted, with the longitudinal axis as a reference, the downstream side in the movement direction of the core piece is concave Displacement to the outer peripheral molding surface side of the forming roller, and continuously feeding the forming roller while maintaining the posture in which the upstream side in the moving direction of the core piece part is displaced relatively to the outer peripheral molding surface side of the convex forming roller than the downstream side The core material that has been subjected to the preliminary twisting process is bent so that the convex forming roller side has a U-shaped cross section with the inner peripheral side, and the twisted plastic deformation of the core material part due to the preliminary twisting process is corrected. A cross section forming step for processing the width direction end of the core piece piece and the width direction end of the adjacent core piece piece in a straight line in the longitudinal direction, and an extrusion mold for forming an extruded product. While feeding a core material with a U-shaped cross section continuously in the longitudinal direction, An extrusion process in which a polymer material is supplied to a mold to form an extruded product and a core material is embedded in the extruded product, and a processing process in which the polymer material portion of the extruded product is cured or solidified is performed. It is good to make it. In the treatment step, when the polymer material is rubber, it can be cured by vulcanization, and when the polymer material is a thermoplastic synthetic resin (including a thermoplastic elastomer), it can be solidified by cooling.

  Alternatively, as in claim 10, a plurality of space portions are formed by punching at predetermined intervals in the longitudinal direction in a part of the long strip-shaped core material in the width direction, and between adjacent space portions. The core material wound around the core material reel in a state in which the core material pieces and the space portions are alternately provided in the longitudinal direction by leaving the core material pieces on the core material is obtained from the core material reel. May be executed continuously in synchronism with the core material sending step, the pre-twisting step, the cross section forming step, the extrusion forming step, and the processing step.

Alternatively, as in claim 11, the core material feed process, the core material forming process, the pre-twisting process, the cross-sectional molding process, the extrusion molding process, and the processing process may be executed continuously in synchronization. good.
When the core material that has not been pre-twisted is bent into a U-shaped cross section, the core material pieces on both sides of the U-shaped core material expand toward the upstream side in the moving direction. Torsional deformation in the direction (the direction in which the downstream side of the core piece moving direction is displaced toward the outer peripheral molding surface of the convex roller and the upstream side of the core piece moving direction is displaced toward the outer peripheral molding surface of the concave forming roller) Therefore, as in the eighth, tenth, and eleventh aspects, in the cross-sectional forming step, the core material that has been pre-twisted is arranged such that the downstream side in the moving direction of the core material piece portion is on the outer peripheral molding surface side of the concave forming roller. A cross-sectional view of the core material that has been pre-twisted while being displaced and continuously supplied to the forming roller while maintaining a posture in which the upstream side in the moving direction of the core piece portion is displaced to the outer peripheral molding surface side of the convex forming roller If it is bent so that it is U-shaped, By torsional deformation of the wood piece, it is possible to correct the twist plastic deformation of the core pieces by the preliminary twist process is widthwise terminal of the core pieces processed to a straight line in the longitudinal direction.

  In the present invention, at the time of preliminary twisting, only one of the downstream side in the moving direction and the upstream side in the moving direction at the time of bending the core piece is set to the other side in the thickness direction of the core material. However, as in the second, sixth, ninth, and twelfth aspects, when the preliminary twisting process is performed, the core material piece is bent and moved downstream in the moving direction. Both the upstream side in the direction may be displaced in the opposite directions in the thickness direction of the core material.

  Several embodiments embodying the best mode for carrying out the present invention will be described below.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, a long weather strip 13 (extruded product) is mounted along the flange 12 on the side or rear of the vehicle body panel or the flange 12 of the door opening edge 11 of the roof. This weather strip 13 is formed by extrusion molding of an elastic polymer material such as rubber or thermoplastic synthetic resin (including thermoplastic elastomer), and a mounting portion 14 having a substantially U-shaped cross section and a cylindrical hollow seal portion made of sponge material. 15 is integrally formed, and a long core material 16 described later is embedded in the attachment portion 14 by extrusion extrusion molding (also referred to as composite extrusion molding) simultaneously with extrusion molding.

  A holding lip 19 is formed integrally on the inner side surface of the vehicle outer side wall 17 and the inner side surface of the vehicle inner side wall 18 of the mounting portion 14 so as to protrude in directions facing each other. When the mounting portion 14 of the weather strip 13 is put on the flange 12 of the door opening edge 11 of the vehicle body panel, the holding lip 19 is elastically deformed so that the flange 12 is sandwiched from both the inside and the outside of the vehicle, whereby the weather strip 13 Is attached to the flange 12. In this manner, the weather strip 13 can be stably fixed to the flange 12 by sandwiching the flange 12 from both sides with the mounting portion 14 of the weather strip 13. At that time, the weather strip 13 can be fixed to the flange 12 by the elastic force of the holding lip 19 by elastically deforming the holding lip 19 and bringing it into contact with the flange 12.

  Further, a shielding lip 20 that protrudes toward the vehicle inner side is integrally formed on the outer side surface of the vehicle inner side wall 18 of the mounting portion 14. When the weather strip 13 is attached to the flange 12, a terminal of an interior member (not shown) in the vehicle is inserted between the shielding lip 20 and the mounting portion 14 (vehicle inner side wall 18), and the shielding lip 20 It is supposed to be covered.

  The weather strip 13 is integrated by embedding the core material 16 in the attachment portion 14 by covering the reinforcing core material 16 with a polymer material when the weather strip 13 is extruded. Thus, the attachment portion 14 is reinforced with the core member 16 so that the attachment portion 14 can be stably fixed to the flange 12.

  By the way, since the flange 12 of the door opening edge 11 of the vehicle body panel is bent two-dimensionally or three-dimensionally in the longitudinal direction (including torsion), the weather strip 13 is formed in a substantially linear shape by extrusion molding. A thing is bent and fitted according to the bent shape of the flange 12. For this reason, the core material 16 embedded in the weather strip 13 is formed with a space portion 24 (see FIG. 2) described later at predetermined intervals in the longitudinal direction so that the core material 16 can be bent freely following the bending of the weather strip 13. ing.

Next, the core material 16 embedded in the weather strip 13 will be described with reference to FIGS. 2 to 6.
As shown in FIG. 2, in a core material forming process described later, a long strip-shaped core material 21 (see FIG. 7) is punched (pressed), so that a plurality of pieces are formed at predetermined intervals in the longitudinal direction. By forming the space portion 24 and leaving the core material piece portions 22 between the adjacent space portions 24, the core material piece portions 22 and the space portions 24 are alternately provided in the longitudinal direction, and the core material piece portions 22 are provided. Are manufactured in the longitudinal direction in the connecting portion 23 (hereinafter, the band-shaped core material 16 is referred to as “core material 16A”). In the first embodiment, the connecting portions 23 that connect the core member pieces 22 are provided in one row along the longitudinal direction, and the space portions 24 between the adjacent core member pieces 22 are formed by one row of connecting portions 23. It is divided into two areas. In addition, you may make it provide the connection part 23 in 2 or more rows.

  Each core member piece 22 is chamfered in a semicircular shape at both end portions in the width direction of the core member 16A, or a corner portion of both end portions is chamfered at a predetermined angle (for example, 45 °). Is prevented from breaking through the weather strip 13 and being exposed to the outside.

  By the way, according to the investigation by the present inventors, when the strip-like core material 16A is bent into a U-shaped cross section which is an intermediate cross-sectional shape or a final cross-sectional shape by roll forming, the cross-sectional U-shaped Direction in which the core piece portions 22 on both sides of the sheet expand toward the upstream side in the moving direction of the roll forming line (the upstream side in the moving direction of the core piece portion 22 is displaced outwardly in a U-shaped cross section, while moving It has been found that the downstream side in the direction is twisted and deformed in the direction of displacement inside the U-shaped cross section.

  In order to prevent such a problem due to the torsional deformation of the core piece 22, in the first embodiment, as shown in FIGS. 3 and 4, the strip-like core 16 A has a U-shaped cross section. In a pre-twisting process, which will be described later, before being bent by roll forming (hereinafter simply referred to as “roll forming processing”), a specific direction (direction in which the core piece 22 is twisted and deformed by roll forming) The core material piece portion 22 is twisted and plastically deformed in the reverse direction) so that the downstream side 22b and the upstream side 22a in the movement direction of the core piece portion 22 are displaced in the opposite directions in the thickness direction of the core material 16. The core material 16 subjected to the pre-twisting process (hereinafter, the core material 16 subjected to the pre-twisting process is referred to as “core material 16B”) is manufactured.

  Thereafter, as shown in FIG. 5 and FIG. 6, in the intermediate cross section forming step described later, the core material 16 </ b> B subjected to the pre-twisting process is continuously crossed in the longitudinal direction, and the cross section is U-shaped. Then, a core material 16 having a U-shaped cross section that is an intermediate cross-sectional shape (hereinafter, the core material 16 having an intermediate cross-sectional shape is referred to as “core material 16C”) is manufactured.

  Thus, before the strip-shaped core material 16A is roll-molded, the core material 16A is pre-twisted so that the specific direction (the direction in which the core material piece 22 is twisted and deformed by the roll molding process) By twisting and plastically deforming the core material piece portion 22 in the reverse direction), the core material piece portion 22 when the core material 16B subjected to the pre-twisting process is roll-formed into a U-shaped cross section thereafter. The twisted plastic deformation of the core material piece portion 22 due to the preliminary twisting process is corrected, and the width direction end of the core material piece portion 22 and the width direction end of the adjacent core material piece portion 22 are aligned in the longitudinal direction. It is trying to become.

Hereinafter, the manufacturing apparatus and manufacturing method of the weather strip 13 (including the manufacturing apparatus and manufacturing method of the core material 16) will be described with reference to FIGS.
First, the manufacturing apparatus and manufacturing method of the core material 16 will be described with reference to FIGS. 7, 9, and 10.
As shown in FIG. 7, an uncoiler 27 (material reel) in which a long strip-shaped core material 21 is continuously wound in a plurality of layers is arranged, and the core material 21 is surrounded from the uncoiler 27 by an outer periphery. The core material 21 is fed to the press device 30 (core material forming means) by performing a core material material sending process in which it is unwound from the side and continuously fed in the longitudinal direction by the feed roller 29 (core material feed means). Between the uncoiler 27 and the delivery roller 29, a core material bonding machine 28 such as a resistance welding machine or a bonding adhesive tape sticking machine is disposed, and after all the core material 21 wound around the uncoiler 27 has been supplied, In the case of replacing the uncoiler 27, the core material joining machine 28 uses the core material 21 supplied from the previous uncoiler 27 in the longitudinal direction and the longitudinal direction of the core material 21 supplied from the next uncoiler 27. Are connected to each other by welding or a bonding adhesive tape or the like.

  The press device 30 has a press die that partially removes a portion corresponding to the space portion 24 while leaving a portion that becomes the core piece portion 22 and a portion that becomes the connecting portion 23 in the width direction of the core material 21. 31 (punch and die) is provided. The core material 21 is punched with the press die 31 to remove a portion corresponding to the space portion 24 while leaving a portion that becomes the core piece portion 22 and a portion that becomes the connecting portion 23. As a result, a plurality of space portions 24 are formed at a predetermined interval in the longitudinal direction (the same pitch in this embodiment), and the core material piece portions 22 are left in the longitudinal direction by leaving the core material piece portions 22 between the adjacent space portions 24. 22 and the space portions 24 are alternately provided at the same pitch, and the core material forming step of forming the strip-shaped core material 16A (see FIG. 2) in which the core material piece portions 22 are connected by the connecting portions 23. Execute.

  Thereafter, the core material 16 </ b> A is taken out from the press device 30 by the take-up roller 32 and supplied to the storage portion 33, and the core material 16 </ b> A is temporarily stored in the storage portion 33 in a curved state. The reservoir 33 has two sets of position sensors 34 (for example, light emitting elements 34a1 and 34a2 and a light receiving element 34b1) for confirming that the length (reserved amount) of the core material 16A is within a predetermined range. , 34b2), and by controlling the driving of the feed roller 29, the press device 30 and the take-up roller 32 based on the output of the position sensor 34, the core material 16A stored in the storage section 33 is controlled. Is maintained within a predetermined range.

  The core material 16A stored in the storage portion 33 is continuously sent out at a constant speed in the longitudinal direction by the sending roller 35 and supplied to the pre-twisting device 36 (pre-twisting means). By this preliminary twisting device 36, the core material piece portion 22 is twisted and plastically deformed in a specific direction in advance before the strip plate-shaped core material 16A is bent into a middle cross-sectional shape (cross-sectional U shape) by roll forming. A preliminary twisting process is performed in which preliminary twisting is performed on the core material 16A.

  As shown in FIGS. 9 and 10, the pre-twisting device 36 has a pair of rotationally driven twisting rollers 37 and 38 disposed so as to sandwich the core 16 </ b> A from both the front and back sides, and the twisting rollers 37 and 38. The concave and convex patterns 39 and 40 for twisting and plastically deforming the core material piece portion 22 of the core material 16A are provided on the outer circumferential surface of the core material 16A at the same pitch as the predetermined pitch of the core material piece portion 22 along the circumferential direction. The concave / convex patterns 39 and 40 are formed on the outer peripheral molding surfaces of the molding rollers 48A to 48N and 49A to 49N and the moving direction of the core member 16B when being bent by roll molding using molding rollers 48A to 48N and 49A to 49N, which will be described later. The core material piece portion 22 is twisted and plastically deformed in the direction specified by the relationship (the direction opposite to the direction in which the core material piece portion 22 is twisted and deformed by bending by roll forming). In the first embodiment, the concave / convex patterns 39, 40 are displaced in the movement direction in which the downstream side 22b in the movement direction of the core piece 22 in the preliminary twisting process is displaced below the surface (upper surface in FIG. 10) S1 of the core 16A. A direction in which the upstream side 22a is displaced upward on the back surface (lower surface in FIG. 10) S2 of the core material 16A (that is, the downstream side 22b in the movement direction of the core material piece portion 22 is the outer periphery molding of concave forming rollers 49A to 49N described later. Twist so that the width direction end of the core piece portion 22 has an inclination angle α in the direction of displacement to the surface side and the upstream side 22a in the movement direction is displaced to the outer peripheral molding surface side of the convex forming rollers 48A to 48N described later. It is formed into a shape to be plastically deformed. Here, the inclination angle α is an angle that is offset or corrected by the twist deformation angle of the core piece 22 in the direction opposite to the angle α generated by the bending process by roll forming.

  The rotational shafts 41 and 42 of the twisting rollers 37 and 38 are connected via the flat gears 43 and 44, and the rotational shaft 42 of the lower twisting roller 38 is rotationally driven by a drive motor or the like (not shown). Thus, the twisting rollers 37 and 38 are rotationally driven in the opposite directions at the same peripheral speed. The twisting rollers 37 and 38 are rotationally driven and the core material 16A is sandwiched between the twisting rollers 37 and 38 and continuously moved in the longitudinal direction while being pressed. Are pre-twisted continuously to twist and plastically deform. Thereby, the manufacture of the core material 16B (see FIGS. 3 and 4) subjected to the pre-twisting process with the inclination angle α is completed.

  In the preliminary twisting process, an example in which both sides are displaced so that the downstream side 22b in the moving direction of the core piece 22 is below the front surface S1 and the upstream side 22a in the moving direction is above the back surface S2. Indicated. However, the present invention is not limited to this, and the upstream side 22a in the movement direction of the core piece 22 may coincide with the surface S1, and only the downstream side 22b in the movement direction may be displaced below the surface S1, or Conversely, the downstream side 22b in the movement direction of the core piece 22 may coincide with the surface S1, and only the upstream side 22a in the movement direction may be displaced above the surface S1. The above displacement form can be similarly applied to other embodiments.

  Further, the range or region of the core piece portion 22 to be subjected to torsional plastic deformation is plastically deformed by bending the bending portions (16a, 16a portions in FIG. 12) on both sides that are plastically deformed by bending processing by roll forming described later. Is a portion that at least partially matches the range covered by.

  Thereafter, as shown in FIG. 7, the core material 16 </ b> B subjected to the preliminary twisting process is supplied to the core material cold roll forming apparatus 47. By this core material cold roll forming apparatus 47, the core material 16B subjected to the pre-twisting process is continuously crossed in the longitudinal direction and has a U-shaped cross section (in the first embodiment, from the final cross section shape). An intermediate cross-section forming step of bending by roll forming so as to obtain a somewhat expanded shape) is performed, and a core material 16C having a U-shaped cross section that is an intermediate cross-sectional shape (see FIGS. 5 and 6) ).

  This core material cold roll forming apparatus 47 has a plurality of protrusions whose outer peripheral molding surfaces sandwiched from above and below are rotated in a convex shape so that a pressing force is applied to the core material 16B in a direction opposite to the displacement of the twist plastic deformation. Forming rollers 48A to 48N and a plurality of concave forming rollers 49A to 49N that have a concave outer peripheral molding surface and are driven to rotate in the reverse direction at the same angular velocity as the convex forming rollers 48A to 48N. As shown in FIG. 12, roll forming is performed by bending the core material 16B into a U-shaped cross section that is an intermediate cross-sectional shape on the outer peripheral surfaces of the forming rollers 48N and 49N at the most downstream portions. A molding surface is provided for performing the above. The core material 16C processed into an intermediate cross-sectional shape (cross-sectional U-shape) has a shape that is somewhat wider than the final cross-sectional shape, and two bent portions 16a on both sides in the width direction of the core material 16C. Is bent at a predetermined bending angle and a predetermined curvature radius, and the temporary bending portion 16b at the center in the width direction is bent at a predetermined bending angle and a predetermined curvature radius in the opposite direction to the bending portion 16a.

  In the first embodiment, as shown in FIG. 11, the convex forming rollers 48A to 48N are arranged on the upper side in the drawing, and the concave forming rollers 49A to 49N are arranged on the lower side. Here, when the core material that has not been pre-twisted is roll-formed into a U-shaped cross section, the core pieces on both sides in the width direction of the U-shaped core material are upstream in the moving direction. Direction of expansion toward the side (the downstream side in the moving direction of the core piece portion is displaced toward the outer peripheral molding surface side of the convex forming roller, and the upstream side in the movement direction of the core piece portion is on the outer peripheral molding surface side of the concave forming roller. Torsional deformation in the direction of displacement). Therefore, as shown in FIG. 11, the core material 16 </ b> B subjected to the pre-twisting process has a downstream side 22 b in the moving direction at the time of roll forming of the core material piece portion 22 on the basis of the front surface S <b> 1 and the back surface S <b> 2 in the longitudinal direction. An attitude (displaced to the outer peripheral molding surface side of the concave forming rollers 49A to 49N from the front surface S1, and the upstream side 22a in the moving direction of the core piece 22 is displaced to the outer peripheral molding surface side of the convex forming roller from the rear surface S2. Convex-forming roller while maintaining the downstream side 22b in the moving direction of the core piece portion 22 below the surface S1 and the upstream side 22a in the moving direction of the core piece portion 22 displaced above the back surface S2). It is continuously supplied between 48A to 48N and the concave forming rollers 49A to 49N.

  Thus, the cross-sectional shape of the core material 16B having a substantially straight width direction subjected to the pre-twisting process is bent and plastically deformed so as to gradually approach a U-shape, and the core material 16B is convexly formed. Bending is performed by roll forming so that the 48N side becomes a U-shaped cross section, and a core material 16C having a U-shaped cross section that is an intermediate cross-sectional shape is continuously formed. When bending by roll forming, the core material piece portion 22 is twisted by pre-twisting due to torsional deformation that occurs in the direction opposite to the inclination angle α of the pre-twisting processing. The plastic deformation is offset or corrected to set the twist inclination angle α to 0, and processing is performed so that the width direction ends of the adjacent core member pieces 22 are straight in the longitudinal direction (see FIG. 6).

  At this time, the range that is bent and plastically deformed is a range indicated by the curves of the bent portions 16a and 16a on both sides in the width direction and the temporary bent portion 16b in the central portion shown in FIG. The portions corresponding to the vehicle outer side wall 17 and the vehicle inner side wall 18 shown in FIG. 1 remain flat and are not bent and plastically deformed.

  In addition, when the core material piece portion 22 of the core material 16B is formed into the U-shape, the bent portions 16a, 16a, and 16b are formed with convex forming rollers 48A to 48N and concave forming rollers 49A to 49N. And is bent to some extent along the longitudinal direction at the bent portions 16a, 16a and 16b. Therefore, it is presumed that the displacement in the direction opposite to the twisting process is caused by the internal stress generated in the core piece part 22 due to the bending process and rolling, so that the twisting displacement is offset or corrected.

  Thereafter, the groove-shaped core material 16 </ b> C having an intermediate cross-sectional shape delivered from the core material cold roll forming apparatus 47 is continuously supplied to the extrusion molding apparatus 50. With this extrusion molding apparatus 50, a weather strip 13A having a predetermined intermediate cross-sectional shape (see FIG. 14) is extruded, and a core member 16C having an intermediate cross-sectional shape is formed on the mounting portion 14 of the weather strip 13A having an intermediate cross-sectional shape. The embedding extrusion process is executed.

  As shown in FIGS. 13 and 14, the extrusion molding apparatus 50 performs extrusion molding to extrude a weather strip 13 </ b> A having an intermediate cross-sectional shape (a shape in which the cross-sectional shape of the mounting portion 14 is wider than the final cross-sectional shape). A core provided with a mold 51 and formed with a guide groove 52 on the inlet side (upstream side) of the extrusion mold 51 for guiding the core material 16C having an intermediate cross-sectional shape while maintaining the posture in the extrusion mold 51. A material guide 53 is provided. While the groove-shaped core 16C having a U-shaped intermediate cross-sectional shape is continuously supplied in the longitudinal direction into the extrusion mold 51, the mounting portion molding polymer material P1 and the cylindrical hollow seal portion are placed in the extrusion mold 51. The molding polymer material P2 is continuously supplied from the separate supply ports 54 and 55, respectively, to extrude the weather strip 13A (attachment portion 14, cylindrical hollow seal portion 15 and the like) having an intermediate cross-sectional shape. Thus, the core material 16C having an intermediate cross-sectional shape is covered with the polymer material, and the core material 16C having an intermediate cross-sectional shape is embedded and integrated in the mounting portion 14 of the weather strip 13A having the intermediate cross-sectional shape.

  Thereafter, as shown in FIG. 8, when the mounting portion molding polymer material and the cylindrical hollow seal portion molding polymer material are rubber, the weather strip 13A having an intermediate cross-sectional shape extruded from the extrusion molding device 50 is cured. It supplies to the processing apparatus 56. The curing processing device 56 heats the weather strip 13A with a heater 57 (for example, a high frequency heater and a hot air heater), and the weather strip 13A main body (unvulcanized rubber portion extruded by the extrusion molding device 50). A processing step of vulcanizing and curing is performed. After the weatherstrip 13A main body is vulcanized and cured, the weatherstrip 13A is cooled by a cooler 58 such as a cooling water tank as necessary.

  In the case where the mounting portion molding polymer material and the cylindrical hollow seal portion molding polymer material are thermoplastic synthetic resins (including thermoplastic elastomer), the heating machine 57 is omitted, and the extrusion molding apparatus 50 is heated. The weather strip 13A having an intermediate cross-sectional shape extruded in a molten state is cooled by a cooling device 58 such as a cooling water tank to solidify the weather strip 13A main body (an unsolidified resin portion extruded by the extrusion molding apparatus 50). The processing step is executed to cool and solidify the weatherstrip 13A main body.

  Thereafter, the weather strip 13A having an intermediate cross-sectional shape is supplied to the trim material cold roll forming device 59, and the temporary bent portion 16b shown in FIG. 12 is bent back into a substantially flat shape by the trim material cold roll forming device 59. A final cross-section forming step is performed in which the attaching portion 14 of the weather strip 13A having an intermediate cross-sectional shape is formed into a final cross-sectional shape (see FIG. 1).

  The trim material cold roll forming device 59 includes a plurality of pairs (for example, three pairs) of forming rollers 60A to 60C and 61A to 61C sandwiching the weather strip 13A in the vertical direction, arranged side by side from the upstream side to the downstream side. On the outer peripheral surface of the downstream forming rollers 60C and 61C, a forming surface for forming the attachment portion 14 of the weather strip 13A into a final cross-sectional shape is provided. The trim material cold roll forming apparatus 59 gradually forms a weather strip 13A having an intermediate cross-sectional shape with a core material 16C having an intermediate cross-sectional shape embedded in the weather strip 13A by each of the forming rollers 60A to 60C and 61A to 61C. The weather strip 13 is deformed into a final cross-sectional shape (the shape of FIG. 1 in which both the cross-sectional shape of the mounting portion 14 and the core member 16 is U-shaped and can sandwich the flange 12). Mold continuously. Thereby, the weather strip 13 having the final cross-sectional shape can be efficiently formed.

  Thereafter, the weather strip 13 having the final cross-sectional shape continuously fed from the trim material cold roll forming apparatus 59 is supplied to the cutting machine 63 while being taken up by the take-up machine 62, and the predetermined distance is provided downstream from the cutting machine 63. The weather strip 13 is cut by the cutting machine 63 each time the tip of the weather strip 13 is detected by a position sensor 64 (for example, an optical sensor made up of a light emitting element 64a and a light receiving element 64b) that is arranged at a distance. The strip 13 is cut to a predetermined length. Thereby, the manufacture of the weather strip 13 in which the core material 16 is embedded is completed.

  In the first embodiment described above, the core material 16 is pre-twisted before the core material 16 is bent into a U-shaped cross section by roll forming, and a core material piece is previously obtained in a specific direction (by bending). Since the core piece portion 22 is twisted and plastically deformed in the direction opposite to the direction in which the portion 22 is twisted and deformed, the core material 16 is then bent into a U-shaped cross section by roll forming. The torsional deformation of the core material piece portion 22 cancels or corrects the torsional plastic deformation of the core material piece portion 22 due to the pre-twisting process so that the width direction ends of the adjacent core material piece portions 22 are substantially straight in the longitudinal direction. It is possible to avoid the occurrence of a step between the edges of the core piece portions 22 adjacent in the longitudinal direction.

  Thereby, when the weather strip 13 in which the core material 16 after being bent by roll forming is embedded is manufactured, the weather strip 13 is caused by the torsional plastic deformation of the core piece portion 22 when bent by roll forming. As a result, it is possible to prevent the surface of the portion where the core material 16 is embedded from being uneven and to prevent part of the core material portion 22 from being exposed to the outside. Property) can be improved.

  Further, since the core material piece portion 22 is not exposed to the outside, the core material piece is applied to a human body or clothing such as a weather strip 13 manufacturing worker, an assembly worker, a user (for example, an automobile occupant with the weather strip 13 assembled). The part 22 does not contact or get caught, and safety can be improved.

  Further, since it is not necessary to increase the thickness of the polymer material portion of the weather strip 13 in order to prevent the core piece portion 22 from being exposed, the thickness of the polymer material portion of the weather strip 13 can be reduced. The weatherstrip 13 can be reduced in weight by reducing the amount.

  Further, there is no step between the edges of the core material piece portion 22 in the longitudinal direction of the core material 16 (the core material piece portion 22 is substantially in a straight line). Therefore, when the weather strip 13 is manufactured, It is possible to prevent the core material piece 22 from being caught by a peripheral member (for example, an internal component of the extrusion mold 51). For this reason, the supply failure of the core material 16 resulting from the catch of the core material piece part 22 does not occur, and the weather strip 13 can be manufactured stably.

  Further, there is no step between the edges of the widthwise ends of the core material pieces 22 adjacent in the longitudinal direction of the core material 16 (that is, the widthwise ends of the adjacent core material pieces 22 are substantially straight in the longitudinal direction. Therefore, when the core material 16 is continuously supplied to the guide groove 52 of the extrusion mold 51, the core material piece portion 22 is prevented from being rubbed strongly against the guide groove 52, and the guide groove 52 is worn. Can be reduced. For this reason, the positional relationship between the guide groove 52 and the core material 16 can be accurately maintained over a long period of time. As a result, the weather strip 13 having a stable quality with little variation in the position of the core material 16 in the weather strip 13 can be obtained. Can be manufactured.

  In the first embodiment, the twisting rollers 37 and 38 are rotationally driven and the core material 16 is sandwiched between the twisting rollers 37 and 38 and continuously moved in the longitudinal direction while being pressed. Since the processing is performed, the core material 16 can be continuously supplied to the twisting rollers 37 and 38 to perform preliminary twisting continuously, and the core material 16 subjected to the preliminary twisting can be efficiently processed. Can be manufactured.

  Next, Embodiment 2 of the present invention will be described with reference to FIG. However, parts that are substantially the same as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified, and parts different from those in the first embodiment are mainly described.

  In the first embodiment, the pre-twisting process is performed using the twisting rollers 37 and 38. However, in the second embodiment, the pre-twisting process is performed using the press die 65 as shown in FIG. I have to. Note that the solid line in FIG. 15 indicates a state in which the press die 65 is closed, and the two-dot chain line in FIG. 15 indicates a state in which the press die 65 is open.

  As shown in FIG. 15, a punch 66 and a die 67 are arranged on a press die 65 for pre-twisting so as to sandwich a strip-like core material 16A from both sides of the front surface S1 and the back surface S2, and the punch 66 and the die 67 A number of concave and convex patterns 68 and 69 for simultaneously twisting and plastically deforming a large number of core material pieces 22 arranged in the longitudinal direction of the core material 16A are provided on the molding surface 67. The concavo-convex patterns 68 and 69 are formed between the outer peripheral forming surfaces of the forming rollers 48A to 48N and 49A to 49N and the moving direction of the core material 16B when roll forming is performed by the forming rollers 48A to 48N and 49A to 49N. The core material piece portion 22 is formed into a shape that twists and plastically deforms in a direction specified by the relationship (the direction opposite to the direction in which the core material piece portion 22 is twisted and deformed by bending in roll forming). In the present Example 2, the uneven | corrugated pattern 68,69 is the direction (the moving direction downstream side 22b of the core piece part 22 is displaced below the surface S1, and the moving direction upstream side 22a is displaced above the back surface S2 ( That is, the downstream side 22b in the moving direction of the core piece 22 is displaced toward the outer peripheral molding surface of the concave forming rollers 49A to 49N, and the upstream side 22a in the moving direction is displaced toward the outer peripheral molding surface of the convex forming rollers 48A to 48N. The core material piece portion 22 is twisted in the direction) to be plastically deformed.

  The pre-twisting press die 65 is arranged side by side with the press die 31 (see FIG. 7) on the downstream half of the bed 30A of the punching press 30. In this case, the pre-twisting press die 65 is driven up and down by the press device 30 that drives the punching press die 31 up and down, and the punching press die 31 is moved up and down and the pre-twisting press die. You may make it synchronize 65 raising / lowering operation | movement. Alternatively, the pre-twisting press die 65 is driven up and down by another press device arranged on the downstream side of the press device 30 that drives the punching press die 31 to move up and down. You may make it synchronize the raising / lowering operation | movement and the raising / lowering operation | movement of the press type | mold 65 for preliminary twist processing.

  In the second embodiment described above, since the preliminary twisting process is performed by pressing the core material 16 with the press die 65, a large number of the press material 65 aligned in the longitudinal direction of the core material 16 at a time. Pre-twisting can be performed while simultaneously sandwiching the core piece 22, and the core 16 subjected to the pre-twisting can be efficiently manufactured.

  In Examples 1 and 2, the core material feed process, the core material forming process, the preliminary twisting process, the intermediate cross section forming process, the extrusion forming process, the processing process, the final cross section forming process, etc. are all synchronized. The weather strip 13 is manufactured continuously, but when only the core material 16 subjected to the pre-twisting process is manufactured, the core material material sending process, the core material forming process, and the pre-twisting process are performed. After the execution, for example, the core material 16 subjected to the pre-twisting process (the core material 16B after the pre-twisting process) is located on the outer side in the radial direction when the core material 21 is wound around the uncoiler 27. The core material winding step of winding around the recoiler 70 (see the two-dot chain line in FIG. 7) as a core material reel is executed so that the side that is on the inner side is located on the inner peripheral side located radially inward. Also good. In this case, the recoiler 70, the rotational drive device of the recoiler 70, and the like correspond to the core material winding means.

  When the weather strip 13 is manufactured, the core material 16 (corresponding to the core material 16A before the pre-twisting process) having a shape in which the core material piece portions 22 and the space portions 24 are alternately provided in the longitudinal direction is externally provided. The core material raw material sending step and the core material forming step may be omitted and the steps after the preliminary twisting step may be executed. In this case, for example, an uncoiler (core material reel) around which the core material 16 before the pre-twisting process is wound is disposed, and the core material 16 before the pre-twisting process is unwound from the outer peripheral side from the uncoiler and is sent in the longitudinal direction by the feed roller. Then, the core material feeding step for continuously feeding is performed, and the core material 16 before the preliminary twisting process is supplied to the preliminary twist device 36.

  Alternatively, the core material 16 subjected to the preliminary twisting process (corresponding to the core material 16B after the preliminary twist process) is obtained from the outside, and the core material material sending process, the core material forming process, and the preliminary twisting process are omitted, You may make it perform the process after an intermediate cross-section formation process. In this case, for example, an uncoiler (recoiler 70 described above) around which the core material 16 after the pre-twisting process is wound is arranged, and the core material 16 that has been pre-twisted from the uncoiler is unwound from the outer peripheral side in the longitudinal direction by the delivery roller. The core material sending step for continuously feeding is performed, and the core material 16 after the preliminary twisting process is supplied to the core material cold roll forming apparatus 47.

  At this time, depending on the specifications of the manufacturing line of the manufacturer that manufactures the core material 16 that has been subjected to the pre-twisting process, if the uncoiler around which the core material 16 after the pre-twist process is wound is arranged as usual, the spare that is sent out from the uncoiler The posture of the core material 16 after twisting may be a posture in which the front and back are reversed from a predetermined normal posture when the core material 16 is supplied to the core material cold roll forming apparatus 47. Here, the normal posture means that the downstream side in the moving direction of the core piece 22 is displaced toward the outer peripheral molding surface side of the concave forming rollers 49A to 49N, and the upstream side in the moving direction is displaced toward the outer peripheral molding surface side of the convex forming roller. 11 is a posture in which the downstream side in the moving direction of the core piece 22 is displaced downward and the upstream side in the moving direction is displaced upward in FIG.

  When the posture of the core material 16 after the pre-twist processing sent from the uncoiler becomes a posture in which the front and back are reversed from the normal posture, for example, by any of the following methods (1) to (3) The posture of the core material 16 after the preliminary twisting process supplied to the material cold roll forming apparatus 47 can be set to a normal posture.

(1) The uncoiler is placed upside down from the posture shown in FIG. 7 so that the posture of the core 16 after the preliminary twisting sent out from the uncoiler becomes a normal posture.
(2) The core material 16 after pre-twisting sent out from the uncoiler is turned upside down with a reversing device before the core material cold roll forming device 47 shown in FIG. The posture of the core material 16 after the preliminary twisting process supplied to is set to a normal posture.
(3) In the manufacturing line of the manufacturer that manufactures the core material 16 subjected to the preliminary twisting process, the preliminary material sent from the uncoiler in the posture shown in FIG. The posture of the core 16 after twisting is set to a normal posture.

  In addition, the application range of the present invention is not limited to an extruded product (weather strip) provided with a cylindrical hollow seal portion, and the present invention may be applied to an extruded product that does not include a cylindrical hollow seal portion. . Furthermore, the present invention is not limited to an extrusion molded product attached to a door opening edge or a window opening edge of an automobile, and can be widely applied to an extrusion molded product in which a core material is embedded or a core material embedded in an extrusion molded product.

It is sectional drawing of the weather strip in Example 1 of this invention. It is a top view which shows the state before the preliminary twist process of a core material. It is a top view which shows the state after the preliminary twist process of a core material. It is AA sectional drawing of FIG. It is sectional drawing of the core material of intermediate cross-sectional shape. It is a top view of the core material of an intermediate cross-sectional shape. It is a schematic block diagram of the first half part of the manufacturing apparatus of a weather strip. It is a schematic block diagram of the second half part of the manufacturing apparatus of a weather strip. It is sectional drawing which looked at the preliminary twist apparatus from the exit side. It is BB sectional drawing of FIG. It is sectional drawing which looked at the position corresponded to the bending part of the width direction outer side of the forming roller of a core material cold roll forming apparatus from the side. It is sectional drawing which looked at the forming roller of the most downstream part of the core material cold roll forming apparatus from the exit side. It is sectional drawing which looked at the extrusion molding apparatus from the side. It is the figure which looked at the extrusion mold from the exit side. It is the figure which looked at the press die of Example 2 from the side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 13 ... Weather strip (extruded product), 16 ... Core material, 21 ... Core material raw material, 22 ... Core material piece part, 23 ... Connection part, 24 ... Space part, 27 ... Uncoiler (reel for raw materials), 29 ... Delivery Roller (core material feed means), 30 ... Pressing device (core material forming means), 36 ... Pre-twisting device (pre-twisting means), 37, 38 ... Twisting roller, 47 ... Core cold roll forming device, 48A 48N ... Convex forming roller, 49A-49N ... Concave forming roller, 50 ... Extrusion molding device, 51 ... Extrusion molding die, 56 ... Curing treatment device, 59 ... Trim material cold roll molding device, 65 ... Press die

Claims (12)

Before embedding in an extruded product made of a polymer material, a convex forming roller whose outer peripheral molding surface is convex and rotates at a predetermined angular velocity in one direction, and a peripheral molding surface is concave and opposite to the convex molding roller. And a concave forming roller rotating at the same angular velocity, and continuously passing in the longitudinal direction from the upstream side to the downstream side of the forming roller so as to be bent by roll forming so as to have a U-shaped cross section. A long core,
The core material is formed by punching a plurality of space portions at predetermined intervals in the longitudinal direction in a part of the width direction of a long strip-shaped core material, and a core material piece portion between adjacent space portions The core piece portions and the space portions are alternately provided in the longitudinal direction by leaving a gap between the outer peripheral molding surface of the molding roller and the moving direction of the core material when being bent by the molding roller. By twisting and plastically deforming the core piece in the direction specified by the relationship, at least one of the movement direction downstream side and the movement direction upstream side during bending of the core piece is the core material A core material, wherein a pre-twisting process is performed so as to process in a state displaced in the opposite direction relative to the other side in the thickness direction.   Processing for displacing both the downstream side in the moving direction and the upstream side in the moving direction at the time of bending of the core piece part in the thickness direction of the core material is performed as the preliminary twisting process. The core material according to claim 1, wherein Before embedding in an extruded product made of a polymer material, a convex forming roller whose outer peripheral molding surface is convex and rotates at a predetermined angular velocity in one direction, and a peripheral molding surface is concave and opposite to the convex molding roller. And a concave forming roller rotating at the same angular velocity, and continuously passing in the longitudinal direction from the upstream side to the downstream side of the forming roller so as to be bent by roll forming so as to have a U-shaped cross section. A method for producing a long core material,
A core material sending process in which the core material is unwound from the outer peripheral side located radially outward from a material reel in which a long strip-shaped core material is continuously wound around a plurality of layers;
A plurality of space portions are formed by punching at a predetermined interval in the longitudinal direction in a part of the width direction of the core material, and the core material pieces are longitudinally left by leaving the core material pieces between adjacent space portions. A core material forming step of forming a core material in which the portion and the space portion are alternately provided; and
The core material piece is twisted and plastically deformed in the direction specified by the relationship between the outer peripheral molding surface of the molding roller and the moving direction of the core material when the core material is bent by the molding roller. At least one of the movement direction downstream side and the movement direction upstream side during bending of the core piece is displaced in the opposite direction relative to the other side in the thickness direction of the core material. A preliminary twisting process for performing a preliminary twisting process;
When the core material that has been subjected to the pre-twisting process is wound around the material reel on the outer periphery in the radial direction when the core material is wound around the inner periphery, the inner periphery is positioned on the radially inner side. A core material winding step of winding around a core material reel so as to be on the side.   In the preliminary twisting step, at least a pair of twisting rollers arranged so as to sandwich the core material from both the front and back sides are rotationally driven, and the core material is sandwiched and pressed between the twisting rollers to continue in the longitudinal direction. The core material manufacturing method according to claim 3, wherein the pre-twisting of the core material piece is performed by moving the core material.   The preliminary twisting step is characterized in that the preliminary twisting of the core material piece is performed by pressing the core material with a press die arranged so as to sandwich the core material from both the front and back sides. 3. A method for producing a core material according to 3.   In the preliminary twisting process, the preliminary twisting process is a process of displacing both the downstream side in the movement direction and the upstream side in the movement direction at the time of bending the core piece in the thickness direction of the core material. The core material manufacturing method according to claim 3, wherein the core material manufacturing method is performed. Before embedding in an extruded product made of a polymer material, a convex forming roller whose outer peripheral molding surface is convex and rotates at a predetermined angular velocity in one direction, and a peripheral molding surface is concave and opposite to the convex molding roller. And a concave forming roller rotating at the same angular velocity, and continuously passing in the longitudinal direction from the upstream side to the downstream side of the forming roller so as to be bent by roll forming so as to have a U-shaped cross section. An apparatus for producing a long core material,
A core material feeding means for unwinding and feeding the core material from the outer peripheral side located radially outward from a reel for a material in which a long strip-shaped core material is continuously wound around a plurality of layers;
A plurality of space portions are formed by punching at a predetermined interval in the longitudinal direction in a part of the width direction of the core material, and the core material pieces are longitudinally left by leaving the core material pieces between adjacent space portions. Core material forming means for forming a core material in which the portion and the space portion are alternately provided; and
The core material piece is twisted and plastically deformed in the direction specified by the relationship between the outer peripheral molding surface of the molding roller and the moving direction of the core material when the core material is bent by the molding roller. At least one of the movement direction downstream side and the movement direction upstream side during bending of the core piece is displaced in the opposite direction relative to the other side in the thickness direction of the core material. Pre-twisting means for performing pre-twisting processing;
When the core material that has been subjected to the pre-twisting process is wound around the material reel on the outer periphery in the radial direction when the core material is wound around the inner periphery, the inner periphery is positioned on the radially inner side. A core material manufacturing apparatus comprising: a core material winding means for winding the core material reel so as to be on the side. Between the convex forming roller whose outer peripheral molding surface is convex and rotating at a predetermined angular velocity in one direction and the concave molding roller whose outer peripheral molding surface is concave and rotates at the same angular velocity in the opposite direction as the convex forming roller. Made of a polymer material in which a long core material is embedded after being bent by roll forming so as to pass through from the upstream side to the downstream side of the molding roller continuously in the longitudinal direction and to have a U-shaped cross section A method for producing an extruded product of
By forming a plurality of space parts by punching at a predetermined interval in the longitudinal direction in a part of the width direction of the long strip-like core material, the core material piece part is left between the adjacent space parts. The core piece portions and the space portions are alternately provided in the direction, and are specified by the relationship between the outer peripheral molding surface of the molding roller and the moving direction of the core material when being bent by the molding roller. By twisting and plastically deforming the core piece in the direction, at least one of the movement direction downstream side and the movement direction upstream side during bending of the core piece is the other in the thickness direction of the core Using a core material wound around a core material reel in a state in which a pre-twist process is performed in a state displaced in the opposite direction relative to the side,
A core material sending step in which the core material subjected to the pre-twisting process is unwound from the outer peripheral side located radially outward from the reel for the core material;
The core material that has been subjected to the pre-twisting process is displaced with respect to the longitudinal axis of the core material piece, the downstream side in the movement direction of the core material piece portion is moved to the outer peripheral molding surface side of the concave forming roller, and the core material piece portion The core subjected to the pre-twisting process is continuously supplied to the forming roller while maintaining the posture in which the upstream side in the moving direction is displaced toward the outer peripheral forming surface side of the convex forming roller relative to the downstream side. The material is bent so as to have a U-shaped cross section with the convex forming roller side on the inner peripheral side, and the twisted plastic deformation of the core piece by the preliminary twisting process is corrected, and the core piece A cross-section forming step for processing the width direction terminal and the width direction terminal of the adjacent core material piece so as to be in a straight line in the longitudinal direction;
While the core material having a U-shaped cross section is continuously supplied in the longitudinal direction to an extrusion mold for forming the extrusion molded article, a polymer material is supplied to the extrusion mold to mold the extrusion molded article and An extrusion process for embedding the core material in an extruded product; and
A process for curing or solidifying the polymer material portion of the extrusion-molded product.   Processing for displacing both the downstream side in the moving direction and the upstream side in the moving direction at the time of bending of the core piece part in the thickness direction of the core material is performed as the preliminary twisting process. The method for producing an extruded product according to claim 8, wherein Between the convex forming roller whose outer peripheral molding surface is convex and rotating at a predetermined angular velocity in one direction and the concave molding roller whose outer peripheral molding surface is concave and rotates at the same angular velocity in the opposite direction as the convex forming roller. Made of a polymer material in which a long core material is embedded after being bent by roll forming so as to pass through from the upstream side to the downstream side of the molding roller continuously in the longitudinal direction and to have a U-shaped cross section A method for producing an extruded product of
By forming a plurality of space parts by punching at a predetermined interval in the longitudinal direction in a part of the width direction of the long strip-like core material, the core material piece part is left between the adjacent space parts. Using a core material wound around a core material reel in a state where the core material piece portions and the space portions are alternately provided in a direction,
A core material sending step of unwinding and feeding the core material from the outer peripheral side located radially outward from the core material reel;
The core material piece is twisted and plastically deformed in the direction specified by the relationship between the outer peripheral molding surface of the molding roller and the moving direction of the core material when the core material is bent by the molding roller. At least one of the movement direction downstream side and the movement direction upstream side during bending of the core piece is displaced in the opposite direction relative to the other side in the thickness direction of the core material. A preliminary twisting process for performing a preliminary twisting process;
The core material that has been subjected to the pre-twisting process is displaced with respect to the longitudinal axis of the core material piece, the downstream side in the movement direction of the core material piece portion is moved to the outer peripheral molding surface side of the concave forming roller, and the core material piece portion The core subjected to the pre-twisting process is continuously supplied to the forming roller while maintaining the posture in which the upstream side in the moving direction is displaced toward the outer peripheral forming surface side of the convex forming roller relative to the downstream side. The material is bent so as to have a U-shaped cross section with the convex forming roller side on the inner peripheral side, and the twisted plastic deformation of the core piece by the preliminary twisting process is corrected, and the core piece A cross-section forming step for processing the width direction terminal and the width direction terminal of the adjacent core material piece so as to be in a straight line in the longitudinal direction;
While the core material having a U-shaped cross section is continuously supplied in the longitudinal direction to an extrusion mold for forming the extrusion molded article, a polymer material is supplied to the extrusion mold to mold the extrusion molded article and An extrusion process for embedding the core material in an extruded product; and
A process for curing or solidifying the polymer material portion of the extrusion-molded product. Between the convex forming roller whose outer peripheral molding surface is convex and rotating at a predetermined angular velocity in one direction and the concave molding roller whose outer peripheral molding surface is concave and rotates at the same angular velocity in the opposite direction as the convex forming roller. Made of a polymer material in which a long core material is embedded after being bent by roll forming so as to pass through from the upstream side to the downstream side of the molding roller continuously in the longitudinal direction and to have a U-shaped cross section A method for producing an extruded product of
A core material sending process in which the core material is unwound from the outer peripheral side located radially outward from a material reel in which a long strip-shaped core material is continuously wound around a plurality of layers;
A plurality of space portions are formed by punching at a predetermined interval in the longitudinal direction in a part of the width direction of the core material, and the core material pieces are longitudinally left by leaving the core material pieces between adjacent space portions. A core material forming step of forming a core material in which the portion and the space portion are alternately provided; and
The core material piece is twisted and plastically deformed in the direction specified by the relationship between the outer peripheral molding surface of the molding roller and the moving direction of the core material when the core material is bent by the molding roller. At least one of the movement direction downstream side and the movement direction upstream side during bending of the core piece is displaced in the opposite direction relative to the other side in the thickness direction of the core material. A preliminary twisting process for performing a preliminary twisting process;
The core material that has been subjected to the pre-twisting process is displaced with respect to the longitudinal axis of the core material piece, the downstream side in the movement direction of the core material piece portion is moved to the outer peripheral molding surface side of the concave forming roller, and the core material piece portion The core subjected to the pre-twisting process is continuously supplied to the forming roller while maintaining the posture in which the upstream side in the moving direction is displaced toward the outer peripheral forming surface side of the convex forming roller relative to the downstream side. The material is bent so as to have a U-shaped cross section with the convex forming roller side on the inner peripheral side, and the twisted plastic deformation of the core piece by the preliminary twisting process is corrected, and the core piece A cross-section forming step for processing the width direction terminal and the width direction terminal of the adjacent core material piece so as to be in a straight line in the longitudinal direction;
While the core material having a U-shaped cross section is continuously supplied in the longitudinal direction to an extrusion mold for forming the extrusion molded article, a polymer material is supplied to the extrusion mold to mold the extrusion molded article and An extrusion process for embedding the core material in an extruded product; and
A process for curing or solidifying the polymer material portion of the extrusion-molded product.   In the preliminary twisting process, the preliminary twisting process is a process of displacing both the downstream side in the movement direction and the upstream side in the movement direction at the time of bending the core piece in the thickness direction of the core material. The method for producing an extruded product according to claim 10, wherein the method is performed.

Images