JPH04307221A - Automatic temporary tightening device - Google Patents

Abstract

PURPOSE:To automate the winding and unwinding of a temporary tightening tape in a process, in which the whole is heated while being slid in the axial direction of a mandrel and vulcanized and the temporary tightening tape is unwound, continuously by spirally winding the temporary tightening tape on a plurality of raw rubber tape layers wound on the mandrel when a pressure rubber hose is manufactured continuously. CONSTITUTION:A temporary tightening tape 28 is wound spirally on a cylindrical surface on which the temporary tightening tape must be wound and which is moved in the axial direction, by a winding machine 17 turned and driven around said cylindrical surface, and the temporary tightening tape 28 is unwound by an unwinding machine 21 mutually connected to the winding machine 17 by a connecting rod 26 and rotated around the cylindrical surface together with the winding machine 17, the front end of the unwound temporary tightening tape 28 is introduced to the winding machine 17, and both ends of the temporary tightening tape 28 are bonded and circulated as an annular endless tape.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a pressure-resistant rubber hose manufacturing device for continuously vulcanizing and molding pressure-resistant rubber hoses by wrapping a raw rubber tape reinforced with cords around a core metal, continuously extruding it and heating it. The present invention relates to an automatic temporary tightening device that wraps a temporary tightening tape on a wrapped layer of raw rubber tape on a core metal and releases the tape after vulcanization.

0002

[Prior Art] Conventionally, in order to manufacture a pressure-resistant rubber hose with a relatively large diameter of several centimeters or more, a rubber lining tape was wound spirally around a steel pipe of a certain length, and the tape was then reinforced with a fiber cord. Multiple layers of raw rubber tape are wrapped in a spiral shape, and temporary tightening tape is further spirally wrapped on top of that to tighten the multiple layers of rubber tape.Then, the steel pipe is passed through a heating furnace for vulcanization and the rubber is heated. It is manufactured by vulcanizing and then removing the molded rubber hose from the steel pipe.

0003

[Problems to be Solved by the Invention] According to the conventional method for manufacturing pressure-resistant rubber hoses, it is only possible to manufacture a rubber hose of a certain length that is approximately equal to the length of the steel pipe that serves as the core metal.
It is not possible to manufacture long pressure-resistant rubber hoses. The steps of wrapping the rubber tape around the steel pipe, vulcanizing it, and pulling it out are batch operations, which has disadvantages such as the inability to perform continuous operations and low production efficiency. Therefore, the applicant has already filed a patent application on Patent Application Hei 2-3.
No. 39239 is a continuous production of a pressure-resistant rubber hose in which multiple layers of lining rubber tape and raw rubber-covered reinforcing cord tape are sequentially wound around a core metal, and the wound layers are heated and vulcanized while being continuously slid on the core metal and pulled out. disclosed the law.

[0004] In order to manufacture a pressure-resistant rubber hose with high pressure-resistant strength, when heating and vulcanizing the wrapped layer of cylindrical raw rubber on the core metal, a temporary tightening tape is wound spirally from the outside and tightened. It is necessary to heat the wrapped layer while applying pressure. In order to fully automate the production process of pressure-resistant rubber hoses and increase the productivity of the entire process, the process of wrapping temporary tape around the wrapping layer of raw rubber before vulcanization and recovering it after vulcanization is also automated. , it is necessary to make it continuous.

Therefore, the present invention provides a method for continuous production of pressure-resistant rubber hoses in which a temporary tightening tape is continuously wound around the outside of the raw rubber wrapping layer on the core metal, and after vulcanization is completed, the tape is collected and continuously recycled for use. The purpose of the present invention is to provide an automatic temporary tightening device that can perform the following steps.

[0006]

[Means for solving the problem] In order to achieve the above purpose,
As a result of extensive research, the inventors of the present invention have found that a large number of smooth conveyor tapes are placed around the entire surface of a tubular core along the axial direction of the core, running from the surface of the core to the inside of the core tube in an endless shape. A raw rubber tape, which is a raw material, is wound spirally on top of this conveyor tape, and the raw rubber tape wrapped on top of the conveyor tape is continuously slid in the axial direction against the core metal. When continuously manufacturing long pressure-resistant rubber hoses by heating and vulcanization molding while moving the core metal, the core metal is placed on a cylinder made of a raw rubber layer that moves in the axial direction on the core metal. Temporary tape is pulled out by a winding machine that revolves around the center and is wound in a spiral shape, passed through a heating area to be vulcanized, and then the temporary tape is wound spirally by an untapping machine that revolves around a core metal. The tightening tape is unstrapped, the tip of the temporary tightening tape is connected to the end of the temporary tightening tape of the winding machine, and the temporary tightening tape is circulated as a circular endless tape to automatically continuously tighten and unwind. The inventors discovered that it is possible to form a belt and completed the present invention.

That is, the present invention provides a cylindrical surface that moves in the axial direction, which is rotatably supported around the cylindrical surface centering on the axis of the cylindrical surface, and is connected to each other by a plurality of parallel connecting rods. A pair of opposing perforated disc-shaped swivel bases that are integrally driven to rotate around the center thereof, and a winding stand that is erected on the downstream surface of the swivel bases on the upstream side of the movement of the cylindrical surface. It has a guide roll and an unraveling guide roll erected on the upstream side of the swivel table on the downstream side of the movement of the cylindrical surface, and is configured to move the cylindrical surface in the axial direction and the winding. The temporary tightening tape pulled out from the winding guide roll is spirally wound on the cylindrical surface by the rotation of the swivel table equipped with the winding guide roll, and the temporary tape is spirally moved a certain distance downstream together with the cylindrical surface. The temporarily tightened tape is pulled out and unstrapped by the unraveling guide roll, and the unstrapped temporary tape is slid between at least two of the connecting rods to guide it to the winding guide roll. The gist is an automatic temporary tightening device that combines both ends of a temporary tightening tape to form an annular endless tape.

[0008]

Embodiments Next, embodiments of the present invention will be explained in detail with reference to the drawings. FIG. 1 is a plan view of an example of a pressure-resistant rubber hose continuous manufacturing apparatus using the automatic temporary tightening device of the present invention.

Reference numeral 1 denotes a pedestal for supporting the entire pressure-resistant rubber hose continuous production apparatus, and a base end 2 is fixed to the pedestal 1, and a cylindrical core bar 3 is supported horizontally. As shown in FIGS. 2 and 3, the core bar 3 has guide holes 6, through which the conveyor tape 5 is inserted, arranged radially in two rows at equal intervals near the distal end 4 and base end 2, respectively, along the circumference. It is provided.

A conveyor tape 5 made of a thin, strong and slippery tape is inserted into the guide hole 6 in the form of an annular endless tape extending in the axial direction of the core bar 3. That is, the conveyor tape 5 is passed along the axial direction of the outer surface of the core bar 3 through the guide hole 6 in the base end part 2 to reach the guide hole 6 in the distal end part 4, and the cylindrical part of the core bar 3 is passed through the guide hole 6 in the distal end part 4. Go inside,
It reaches the guide hole 6 of the base end portion 2 along the inner surface of the cylinder and is joined in an annular manner to form an endless conveyor tape.

An even number of conveyor tapes 5 are placed on the surface of the core metal 3.
Adjacent conveyor tapes 5 are arranged so that part of their width overlaps each other, and the entire surface of the cylindrical core bar 3 except for a portion of its tip 4 and base end 2 is It is covered with an axially extending conveyor tape 5.

As described above, the conveyor tape 5 may be joined in an annular shape every time it makes one reciprocation through the guide hole 6, and a plurality of annular endless tapes may be arranged in parallel. From the hole 6, go back and forth through the guide hole 6 of the distal end 4 to the proximal end 2.
When returning to , one conveyor tape 5 is sequentially inserted into all guide holes 6 so that it is inserted into the guide hole 6 adjacent to the guide hole 6 of the proximal end 2 that was inserted earlier, and then both ends of the conveyor tape 5 are inserted It is preferable to join them together to form one circular endless tape. The conveyor tape 5 is a slippery tape with a small surface friction coefficient and low sliding resistance with the surface of the core metal 3, and the peelability of the vulcanized rubber that adheres to the surface under pressure. A heat-resistant tape with good hardness and strength is used. For example, a fluororesin tape reinforced with an embedded aromatic polyamide fiber cloth is preferably used.

[0013] At least a certain length of the inside of the core bar 3 near the tip 4 has a double tube structure, and a heating medium such as steam is passed through the gap between the double tubes so that it can be heated from the inside. desirable.

Reference numeral 7 denotes an inner rubber servicer, which continuously wraps the inner rubber tape 8 supplied from this servicer directly on the conveyor tape 5 near the base end 2 of the core bar 3 so as to avoid any gaps. The lining rubber tape 8 may be wound spirally or longitudinally so that one seam is formed in the axial direction.

9 is a lining rubber tape 8 wrapped around the core metal 3.
A mesh servicer 12 spirally wraps a rubber mesh tape 10 on top of the rubber mesh tape 10, a wire servicer 12 spirally wraps a reinforcing wire 11 onto the rubber mesh tape 10, and 13 and 14 reinforcements each covered with raw rubber. This is a cord servicer that sequentially winds a cord tape 15 over a reinforcing wire 11 in a spiral manner.

16 is an automatic temporary tightening device of the present invention, the details of which are shown in FIGS. 4 and 5. Reference numeral 17 denotes a winding machine which is supported as a whole around the core metal 3 by a bearing 25 of a support base 20 so as to be freely rotatable, and includes a perforated disc-shaped rotating base 18 and the rotating base 18.
A plurality of winding guide rolls 1 that are parallel to each other are installed above.
Consists of 9.

Reference numeral 21 denotes a stripping machine, which, like the winding machine 17, consists of a perforated disk-shaped rotating base 22 and a stripping guide roll 23 erected on the rotating base 22, and the entire stripping machine is a support base. 24, it is rotatably supported around the core metal 3. Wrapping machine 17
The swivel table 18 and the swivel table 22 of the unraveling machine 21 are connected to each other by a plurality of connecting rods 26, and the winding machine 17 and the unraveling machine 21 rotate together around the core metal 3. Reference numeral 27 denotes a driving gear for integrally driving the winding machine 17 and the unraveling machine 21 to rotate, and is rotationally driven by a driving motor via a gear that meshes with this gear.

Reference numeral 28 denotes a temporary tightening tape, which is pulled out from the winding guide roll 19 by the winding machine 17 rotating around the core metal 3, and moves at a constant speed in the axial direction of the arrow. It is wound spirally on the raw rubber cylinder above 3 without any gaps, and passes through the vulcanization heat-retaining tube 29 while moving in the direction of the arrow.
After the raw rubber cylinder is heated and vulcanized, it is pulled out and unstriped by the unstriping guide roll 23 of the unstriping machine 21, and is reciprocated several times between the two connecting rods 26 for sashing or sashing. It is guided in the direction of the winding machine 17 while being wound around. Then, the tip of the unstrapped temporary tape 28 is connected to the end of the temporary tape 28 on the winding machine 17 side, and the temporary tape 28 becomes a circular endless tape, and is automatically connected to the winding machine 17. It circulates between the stripper 21.

The winding guide roll 19 and the unwrapping guide roll 23 each spirally wind the temporary tape 28 on the rubber cylinder on the core bar 3, or unwind the spirally wound tape. In order to be able to do this smoothly, it is preferable to incline the spiral in a direction substantially perpendicular to the inclination direction of the spiral. Also, a winding guide roll 19 and an unraveling guide roll 2
3 may be non-rotatably fixed to the swivel bases 18 and 22, respectively, or may be rotatably attached around the axis thereof.

Reference numeral 31 denotes a pulling machine for pulling out a pressure-resistant rubber hose 35 that has been heated and vulcanized through a vulcanized heat-retaining tube 33, and a plurality of belts extending around the vulcanized rubber hose in its axial direction. It is designed to be surrounded by a conveyor and pulled out while being grasped. The tip 4 of the core bar 3 extends to the position of the take-up machine 31, and the conveyor tape 5 that has moved together with the rubber hose to the tip 4 of the core bar 3
is peeled off from the lining rubber on the inner surface of the pressure-resistant rubber hose vulcanized at the distal end 4 of the core metal 3 and returns to the base end 2 through the cylindrical interior of the core metal 3.

[0021]

[Operation] According to the automatic temporary tightening device 16 of the present invention, the winding machine 1
The temporary tightening tape 28 let out from the winding guide roll 19 of No. 7 moves the raw rubber wrapping layer on the core bar 3 in the axial direction,
As the wrapping machine 17 rotates, the raw rubber wrapping layer is automatically wound spirally onto the cylinder, heated while moving in the axial direction, heated and vulcanized, and then rotated at the same speed as the wrapping machine 17. The temporary tape 28 is unstrapped by the unwrapping machine 21, and the unstrapped temporary tape 28 is automatically circulated to the winding machine 17. The tension for tightening the temporary tape 28 is generated due to the sliding resistance when the tape is passed between the connecting rods 26 and slid thereon.

If the sliding resistance when the temporary tightening tape 28 slides on the connecting rod 26 is too large, a freely rotating cylinder is placed on the outside of at least one of the connecting rods 26 on which the temporary tightening tape 28 slides. Fit the shaped sleeve and apply temporary tape 2 on top of it.
You can multiply it by 8. Unstrapped temporary tape 28
The route in which the material is passed around the connecting rod 26 and circulated to the winding machine 17 is not limited to the route shown in FIG. 5, but can be circulated through any route.

The automatic temporary tightening device of the present invention is applicable not only to a pressure-resistant rubber hose continuous production device, but also to any case where it is necessary to spirally wrap a tape around a cylindrical surface that moves in the axial direction and untie it after moving a certain distance. It can be applied to

[0024] In the manufacturing process of the pressure-resistant rubber hose,
The winding layer wound on the core bar 3 is pulled by the take-up machine 34 and slides and moves toward the tip of the core bar 3 together with the conveyor tape 5, and no driving force is applied to the conveyor tape 5 itself from the inside. However, the frictional force between the conveyor tape 5 and the surface of the core bar 3 is small, so even if the winding layer is tightened from the outside with a large pressure, it will slide relatively lightly on the surface of the core bar 3 along with the outer winding layer. can move.

[0025]

Effects of the Invention According to the automatic temporary tightening device of the present invention, the winding and untapping of the temporary tightening tape in the pressure-resistant rubber hose continuous manufacturing device are automatically and continuously performed, and the temporary tightening tape released by the unraveling machine can be There is no need to manually attach the tape to the wrapping machine, and it is highly effective in automating and continuous production of pressure-resistant rubber hoses.

[Brief explanation of drawings]

[Fig. 1] A plan view of an example of the pressure-resistant rubber hose continuous manufacturing apparatus of the present invention.

[Figure 2] Front view of core metal

[Figure 3] Cross-sectional view of core metal

[Figure 4] Front view of automatic temporary tightening device

[Figure 5] Side view of automatic temporary tightening device

[Explanation of symbols]

1 Mount 2 Base end 3 Core metal 4 Tip part 5 Conveyor tape 6 Guide hole 7 Inner rubber servicer 8. Lining rubber tape 9 Mesh servicer 10 Rubber mesh tape 11 Reinforcement wire 12 Wire servicer 13, 14 Code servicer 15 Reinforcement cord tape 16 Automatic temporary tightening device 17 Winding machine 18 Swivel base 19 Winding guide roll 20 Support stand 21　Striping machine 22 Swivel base 23 Guide roll for unraveling 24 Support stand 25 Bearing 26 Connecting rod 27 Drive gear 28 Temporary tape 29 Vulcanized heat retention tube 31 Collection machine

Claims (1)

[Claims] Claims: 1. A cylindrical surface that moves in the axial direction, which is rotatably supported around the cylindrical surface with the axis of the cylindrical surface as the center, and which are connected to each other by a plurality of mutually parallel connecting rods to form an integral body. a pair of opposing perforated disc-shaped turning tables that are rotationally driven around the center; and a winding guide roll that is erected on a surface on the downstream side of the turning table on the upstream side of the movement of the cylindrical surface. ,
and a stripping guide roll erected on the upstream surface of the swivel table on the downstream side of the movement of the cylindrical surface, and the winding guide roll is configured to move the cylindrical surface in the axial direction and to move the winding guide roll. The temporary tightening tape pulled out from the winding guide roll is spirally wound onto the cylindrical surface by the rotation of the rotating table provided with the rotating base, and the spiral temporary tightening tape is moved a certain distance downstream together with the cylindrical surface. is pulled out and unstrapped by the unwrapping guide roll, and the unstrapped temporary tape is passed around and slid between at least two of the connecting rods and guided to the winding guide roll. Automatic temporary tightening with both ends joined to form an endless circular tape.