JP4655588B2 - Method and apparatus for forming laminated sheet material - Google Patents

Description

  The present invention relates to a method and apparatus for forming a laminated sheet material, and more particularly, to a method and apparatus for forming a laminated sheet material that enables forming a laminated sheet material that does not generate wrinkles and the like while simplifying the apparatus.

  In the process of forming an unvulcanized tire in the manufacturing process of a pneumatic tire, there is a process of cutting a plurality of types of sheet materials into a predetermined length and winding them around a forming drum. For example, there is a step of sequentially winding a sheet material such as an inner liner material or a carcass material formed from unvulcanized rubber into a length corresponding to one round of a tire, and then winding it around a molding drum. Conventionally, such sheet materials have been manually cut and wound around a forming drum. However, since manual operations have limited productivity, in recent years, each sheet material has been conveyed by a separate conveyor. However, a number of automatic forming apparatuses have been proposed in which they are cut to the required dimensions, and are continuously bonded on a conveyor and then wound around a forming drum.

  However, in such an automatic forming apparatus, it is important to synchronize the transfer speeds of the sheet materials by a plurality of conveyors. When the synchronization of the transfer speeds is incomplete, the supply timing between the plurality of sheet materials is There is a problem that wrinkles and misalignment occur due to misalignment. However, in order to synchronize the supply timing, the device structure and the control mechanism are complicated, and it is inevitable that the equipment cost is increased.

As a countermeasure, Patent Document 1 discloses that when two sheet materials supplied from two conveyors are stacked, one conveyor is made a driven type having no drive unit, thereby providing a conveyor having the other drive unit. Proposals have been made to synchronize the transfer speeds of both sheet materials by laminating them to accompany them. However, in this proposal, since the swing roller is used as the contact pressure means after the lamination, the swing roller not only causes the apparatus to be complicated as an excessive structure, but also the swing roller is caused by line contact. Since the surface of the laminated sheet material is brought into contact pressure, there is a problem that prevention of wrinkle generation is not always perfect due to insufficient pressure bonding.
JP-A-8-174712

  An object of the present invention is to provide a method and apparatus for forming a laminated sheet material that enables the formation of a laminated sheet material that does not generate wrinkles and the like while simplifying the apparatus.

  The method for forming a laminated sheet material of the present invention that makes it possible to achieve the above object uses a forming apparatus in which at least a driving type upper conveyor and a driven type lower conveyor are provided on a forming drum, and the upper conveyor uses the forming apparatus. While transporting one sheet material, the lower sheet material is laminated so as to accompany the second sheet material, and the laminated sheet material is wound around the front end portion of the upper conveyor while the front end portion of the lower conveyor is wound around the lower portion. Transfer to the conveyor side, and then the lower conveyor is brought into contact with the forming drum to transfer the laminated sheet material to the forming drum.

  Also, the laminated sheet material forming apparatus of the present invention is an apparatus for carrying out the above forming method, wherein at least a driving type upper conveyor and a driven type lower conveyor are provided on a forming drum, and the lower conveyor is provided. The front end portion of the upper conveyor can be alternately moved to a position where the front end portion is wound around and a position where the front end portion is separated downward, and the front end portion can be alternately moved to a position where the outer periphery of the forming drum abuts and a position where the front end is retracted. It is characterized by that.

  According to the present invention, as described above, a molding apparatus in which at least a drive type upper conveyor and a driven type lower conveyor are provided on a molding drum is used, and the second sheet material is accompanied with the first sheet material. Since the front end of the lower conveyor is wrapped around the front end of the upper conveyor, the contact pressure of the laminated sheet is not a line contact but a large area contact, so there are no wrinkles or misalignment A bonded laminated sheet material that is completely adhered can be obtained.

  In addition, since the front end portion of the lower conveyor is wound around the front end portion of the upper conveyor, no extra contact pressure laminating means is provided, so that the apparatus can be simplified.

  Hereinafter, it demonstrates concretely with reference to the implementation apparatus of the shaping | molding method of the lamination sheet material of this invention.

  1 and 2 illustrate a molding apparatus in the present invention when an inner liner material and a carcass material are bonded and laminated and wound around a molding drum.

  1 is an upper conveyor for supplying an inner liner material A corresponding to a first sheet material, 2 is a supply conveyor for supplying a carcass material B corresponding to a second sheet material, and 3 is an inner liner material A and a carcass material B bonded together. It is a lower conveyor which stocks the laminated sheet material C temporarily. The upper conveyor 1 and the lower conveyor 3 are set so that the front ends thereof face the forming drum 4.

  The conveyor 1 for supplying the inner liner material A is a belt conveyor in which a belt 12 is wound around a pair of front and rear rollers 10 and 11. The conveyer 1 is a drive type conveyer according to the present invention, and a drive motor 13 is connected to a roller 11 on the rear side, and the drive motor 13 is controlled by a control unit (not shown) to advance the belt 12. Reverse or stop. The conveyor 1 is provided with an auxiliary conveyor 1 ′ at the rear, and the auxiliary conveyor 1 ′ supplies the inner liner material A to the conveyor 1 from a stock reel (not shown). A cutter 14 is provided between the conveyor 1 and the auxiliary conveyor 1 ′, and the cutter 14 cuts the inner liner material A supplied from the auxiliary conveyor 1 ′ to a predetermined length according to a command from the control unit. Yes.

  The auxiliary conveyor 1 ′ is a belt conveyor in which a belt 12 ′ is wound around rollers 10 ′ and 11 ′, and is controlled so that the belt 12 ′ moves forward, backward or stops by a drive motor 13 ′ connected to the roller 10 ′. It has come to be. The drive source of the auxiliary conveyor 1 ′ is not necessarily provided as an independent drive motor 13 ′. For example, power is input from the upper conveyor 1 side using a transmission mechanism such as a clutch and a timing belt. It may be.

  The supply conveyor 2 for the carcass material B is a roller conveyor in which a number of free rotating rollers 21 are held in a rack 21. Since it does not have a drive part, it is a driven type conveyor as referred to in the present invention. The supply conveyor 2 is provided with a cutter 23 and an advancer 24 at the front end, and further with a set pulley 5 in the front. The advancer 24 performs a function of holding the front end portion of the carcass material B on the supply conveyor 2 to the front of the set pulley 5 and temporarily attaching the front end portion onto the belt 12 of the conveyor 1. The cutter 23 cuts the carcass material B fed from the supply conveyor 2 into a predetermined set length.

  As indicated by the chain line in FIG. 1, the set pulley 5 swings alternately between a position in contact with the belt 12 and a position separated upward. The set pulley 5 lightly presses the carcass material B on the belt 12 or the laminated sheet material of the inner liner material A and the carcass material B, temporarily fixes the carcass material B to the surface of the belt 12, or the inner liner material A. And the carcass material B are temporarily fixed. As shown in FIG. 2, the set pulley 5 supports a large number of discs 52 on a support shaft 51 so as to be rotatable at regular intervals and in an abacus bead shape, and both ends of the support shaft 51 are oscillating arms 53. , 53, and the swing arm 53 is swung by a drive motor 54. As a driving means for the swing arm 53, a reciprocating actuator such as an air cylinder or a hydraulic cylinder may be used instead of the drive motor 54.

  The lower conveyor 3 that temporarily stocks the laminated sheet material C includes a belt conveyor in which a belt 32 is wound around a pair of front and rear rollers 30 and 31. And this lower conveyor 3 does not have the drive part which drives the belt 32 positively, but is a driven type conveyor said by this invention.

  As shown by an arrow R in FIG. 1, the lower conveyor 3 swings around the axis O of the roller 31 as a fulcrum, and a position where its front end is wound around the front end of the upper conveyor 1 and a position spaced downward It is configured to move up and down alternately. Further, at a position spaced downward, as indicated by an arrow S, the front end can be moved back and forth alternately between a position where the front end is in contact with the surface of the forming drum 4 and a position where the front end is retracted backward. ing. The vertical movement means and the forward / backward movement may be a known mechanism, and for example, a hydraulic cylinder or an air cylinder that operates to expand and contract, or a combination mechanism of a rack and a pinion can be used.

  The method for forming a laminated sheet material of the present invention is carried out as follows by using the above forming apparatus.

  First, as shown in FIG. 1, the inner liner material A (first sheet material) is waited on the auxiliary conveyor 1 ′ of the conveyor 1, and the carcass material B (second sheet material) is waited on the supply conveyor 2. The inner liner material A is a low air permeable rubber unvulcanized rubber sheet such as butyl rubber, and the carcass material B is a sheet in which a number of carcass cords are coated with unvulcanized coated rubber, both of which are adhesive. It is a sheet.

  When each sheet material is set as described above, as shown in FIG. 3, the auxiliary conveyor 1 ′ and the conveyor 1 are driven to feed the inner liner material A onto the conveyor 1. When the front end of the inner liner material A advances to a predetermined position, the advancer 24 of the supply conveyor 2 pulls out the carcass material B onto the conveyor 1 (belt 12) slightly ahead of the front end of the inner liner material A. Since the supply conveyor 2 is driven, the upper surface of the carcass material B is pressed by the set pulley 5 while being accompanied by the same speed as that of the conveyor 1, and is further laminated on the surface of the inner liner material A so that the front end of the conveyor 1 It is conveyed to the part. Since the carcass material B at this time is pulled out at the same speed as the inner liner material A, the inner liner material A and the carcass material B will not be wrinkled by misalignment.

  Next, as shown in FIG. 4, the front end portion (on the roll 30 side) of the lower conveyor 3 is raised and wound around the front end portion of the upper conveyor 1, and surface pressure is applied so as to wrap the laminated sheet material C in a curved shape. Thus, the interface between the inner liner material A and the carcass material B is pressure-bonded. At the same time as the winding operation, as shown in FIG. 5, the belt 32 of the driven lower conveyor 3 is moved at the same speed as the laminated sheet C by the power of the upper conveyor 1, so that the laminated sheet material C is the inner sheet material C. The liner material A and the carcass material B are bonded together with high accuracy without causing any deviation or wrinkle.

  Further, as described above, the laminated sheet C that accompanies and moves at the same speed as the belt 32 is transferred and stored on the lower conveyor 3 side. Then, when the inner liner material A and the carcass material B are each pulled out to the length of one round of the tire, the cutters 14 and 23 are operated, and the rear end portions of the respective sheet materials are cut. The laminated sheet material C having a predetermined length is stocked on the lower conveyor 3.

  Next, as shown in FIG. 6, the lower conveyor 3 is changed from the state in which the front end portion is wound to the state in which the lower end is in contact with the lower surface of the front end portion of the upper conveyor 1, and then the upper conveyor 1 is reversed to The laminated sheet material C transferred to 3 is cueed to the front end portion of the lower conveyor 3. Further, as shown in FIG. 7, after the front end portion of the lower conveyor 3 is separated from the lower surface of the front end portion of the upper conveyor 1, it is advanced toward the forming drum 4 side.

  As the lower conveyor 3 moves forward, as shown in FIG. 8, when the front end portion comes into contact with the outer peripheral surface of the forming drum 4, the cueing portion of the laminated sheet material C is transferred to the forming drum 4 and at the same time, the power of the forming drum 4. In response, the belt 32 starts moving in the direction of the arrow. Accordingly, the laminated sheet material C on the belt 32 is transferred so as to be wound around the peripheral surface of the forming drum 4 while moving to the forming drum 4 side, and finally is wound around one turn as shown in FIG. . Thereafter, it is subjected to a known molding process such as a bead driving process. Further, the lower conveyor 3 retracts from the forming drum 4 and returns to the initial state of FIG.

  The embodiment described above is for a laminated sheet material in which an inner liner material and a carcass material are bonded to each other and wound around a forming drum, but the present invention relates to a case in which other adhesive sheet materials are similarly bonded and wound. Can also be applied.

It is the schematic which illustrated the apparatus which enforces the shaping | molding method of the lamination sheet material of this invention. It is an arrow view of the direction shown by the arrow X in FIG. It is the schematic which shows the process following FIG. 1 among the processes which implement this invention. It is the schematic which shows the process following FIG. 3 among the processes which implement this invention. It is the schematic which shows the process following FIG. 4 among the processes which implement this invention. It is the schematic which shows the process following FIG. 5 among the processes which implement this invention. It is the schematic which shows the process following FIG. 6 among the processes which implement this invention. It is the schematic which shows the process following FIG. 7 among the processes which implement this invention. It is the schematic which shows the process following FIG. 8 among the processes which implement this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper conveyor 2 Supply conveyor 3 Lower conveyor 4 Molding drum 5 Set pulley 13 Drive motor 14, 23 Cutter 24 Advancer A Inner liner (1st sheet material)
B Carcass material (second sheet material)
C Laminated sheet material

Claims (5)

  Using a molding apparatus in which at least a driving type upper conveyor and a driven type lower conveyor are arranged on a molding drum, and transporting the first sheet material by the upper conveyor, and accompanying the second sheet material thereon And the laminated sheet material is transferred to the lower conveyor side while the front end portion of the lower conveyor is wrapped around the front end portion of the upper conveyor and brought into contact therewith, and then the lower conveyor is brought into contact with the forming drum. A method of forming a laminated sheet material by transferring the laminated sheet material to a forming drum.   The method for forming a laminated sheet material according to claim 1, wherein a driven supply conveyor is provided above the upper conveyor for supplying the second sheet.   At least a driving type upper conveyor and a driven type lower conveyor are arranged on the forming drum, and the lower conveyor is alternately arranged at a position where its front end is wound around the front end of the upper conveyor and a position where the lower end is separated downward. The apparatus for forming a laminated sheet material according to claim 1 or 2, wherein the apparatus can be moved to a position where the outer periphery of the forming drum is in contact with and a position where the forming drum moves backward.   The apparatus for forming a laminated sheet material according to claim 3, wherein a driven supply conveyor is provided above the upper conveyor for supplying the second sheet. A set pulley is provided between the front end portion of the supply conveyor and the front end portion of the upper conveyor to alternately contact and separate from the upper conveyor, and the set pulley is arranged in parallel with a plurality of disks spaced apart The apparatus for forming a laminated sheet material according to claim 4, wherein the laminated sheet material is configured as described above.

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