JP2952711B2 - Continuous production method and equipment for pressure-resistant rubber hose - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention winds a raw rubber tape reinforced with a cord around a cored bar and continuously extrudes and heats it to continuously vulcanize and form a pressure-resistant rubber hose. And a method of manufacturing a pressure-resistant rubber hose for the same.

[Conventional technology]

Conventionally, in order to manufacture a relatively large diameter pressure-resistant rubber hose with a diameter of several cm or more, a rubber tape for lining is spirally wound around a steel pipe of a certain length, and a raw rubber tape reinforced with a fiber cord is spirally wound on it. After a plurality of layers are wound, a tape for temporary fastening is spirally wound thereon, and a plurality of rubber tape layers are fastened, and the steel pipe is passed through a heating furnace for vulcanization to vulcanize and form rubber. It is manufactured by a method of extracting a molded rubber hose from a steel pipe.

[Problems to be solved by the invention]

According to the conventional method of manufacturing a pressure-resistant rubber hose, only a rubber hose having a fixed length substantially equal to the length of a steel pipe serving as a core metal can be manufactured, and a long pressure-resistant rubber hose cannot be manufactured. Winding of rubber tape on steel pipe, vulcanization,
Each of the sampling steps is a batch type operation, so that continuous operations cannot be performed and production efficiency is low.

Accordingly, an object of the present invention is to provide a method of manufacturing a pressure-resistant rubber hose capable of continuously manufacturing a pressure-resistant rubber hose and a long pressure-resistant rubber hose, and an apparatus used for the method.

[Means for solving the problem]

In order to achieve the above object, the present inventors have conducted intensive studies, and as a result, a large number of slippery conveyor tapes along the axial direction of the core metal around the entire surface of the tubular core metal, from the outer surface of the core metal. The raw rubber-coated tape of the raw material is spirally wound on this conveyor tape, and the raw rubber-coated tape wound on the core tape is wound around the core tape. It has been found that a long pressure-resistant rubber hose can be continuously manufactured by heating and vulcanizing while continuously sliding and moving in the axial direction with respect to the present invention. Reached.

That is, the present invention relates to a pressure-resistant rubber hose manufacturing method in which a lining rubber tape, a plurality of rubber-coated reinforcing cord tapes and other reinforcing members are laminated and wound on a cylindrical core metal as required, and heated and vulcanized. Surrounding the peripheral surface of the metal core with a conveyor tape that extends in the axial direction of the metal core and is slidable in the axial direction of the metal core, wraps a rubber lining tape on the metal core surrounded by the conveyor tape, While sliding the wrapped rubber tape together with the conveyor tape on the core metal in the axial direction of the core metal, a mesh or cloth tape coated with raw rubber is spirally wound on the rubber rubber tape in a plurality of layers sequentially. A tape for temporary fastening is spirally wound on the winding layer, and the plurality of winding layers wound on the core metal are continuously passed through a heating zone to be continuously vulcanized and formed. Remove the fastening tape and press the molded pressure-resistant rubber From the scan the inner surface and gist continuous preparation of pressure-resistant rubber hose, characterized by continuously stripping the conveyor tapes.

Another invention is a pressure-resistant rubber hose manufacturing method in which a lining rubber tape, a plurality of rubber-coated reinforcing cord tapes and other reinforcing members are laminated and wound on a cylindrical core metal as required, and heated and vulcanized. By fixing the base end to the gantry, the whole is supported horizontally, and a plurality of conveyor tape insertion guide holes are arranged at equal intervals along the circumferential direction at the base end and near the end, respectively. A metal core having an endless conveyor tape that is arranged along the outside and inside of the cylindrical metal core through the guide hole at the base end portion and the guide hole at the distal end portion and that is continuous in an annular shape; and a base end of the metal core. A lining rubber tape wrapping means for wrapping a lining rubber tape on the conveyer tape of a cored bar, and a mesh or cloth tape coated with raw rubber on the lining rubber tape wrapped on the cored bar in a plurality of layers sequentially in a spiral manner. wear Tape winding means, heating means for heating and vulcanizing the entire plurality of winding layers wound on the core metal from outside the winding layer, and pressure-resistant rubber hose vulcanized and molded on the core metal Is gripped from the outside at the tip of the core bar and pulled in the axial direction of the core bar, and the entire winding layer wound on the core bar is slid in the axial direction of the core bar together with the conveyor tape on the surface of the core bar. A winding means for spirally winding a tape for temporary fastening on a winding layer on a core metal at an entrance of the heating means, and winding off the tape for temporary fastening at an exit of the heating means. And a pressure-resistant rubber hose continuous manufacturing apparatus, comprising:

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of an example of a continuous apparatus for continuously manufacturing a pressure-resistant rubber hose of the present invention, and FIG.

(1) is a gantry for supporting the entire apparatus for continuously manufacturing a pressure-resistant rubber hose of the present invention. The base (2) is fixed to the gantry (1), and a cylindrical metal core (3) is horizontally supported. As shown in FIGS. 3 and 4, the core metal (3) is provided with a conveyor tape (5) near its distal end (4) and proximal end (2).
Are provided radially at equal intervals in two rows along the circumference.

A conveyor tape (5) made of a thin, durable and slippery tape is inserted into the guide hole (6) in the form of an annular endless tape extending long in the axial direction of the cored bar (3). That is, the conveyor tape (5) is moved from the guide hole (6) at the base end (2) to the outer surface of the core metal (3) along the axial direction thereof to reach the guide hole (6) at the tip (4). An endless conveyor enters the cylinder of the cored bar (3) from the guide hole (6) of the portion (4), reaches the guide hole (6) of the base end (2) along the inner surface of the cylinder, and joins in an annular manner. Use tape.

An even number of conveyor tapes (5) are disposed on the surface of the cored bar (3), and the adjacent conveyor tapes (5) are disposed so that a part of their widths overlap each other. The surface of (2) is covered with a conveyor tape (5) extending in the axial direction, except for a part of the distal end (4) and a part of the proximal end (2).

As described above, the conveyor tape (5) may be joined annularly each time the guide hole (6) reciprocates one time, and a plurality of annular endless tapes may be arranged in parallel. ) When the guide hole (6) reciprocates from the guide hole (6) of the distal end portion (4) and returns to the base end portion (2), the guide hole (6) of the base end portion (2) inserted first. One conveyor tape (5) is sequentially inserted into all the guide holes (6) so as to be inserted into the guide holes (6) adjacent to the end, and both ends thereof are joined to form a single annular endless body. Preferably, it is a tape.

The conveyor tape (5) is a slippery tape having a small coefficient of friction on the surface and a small sliding resistance with the surface of the metal core (3). A high-strength heat-resistant tape with good rubber releasability is used. For example, a fluororesin tape in which an aromatic polyamide fiber cloth is embedded and reinforced is preferably used.

At least a portion of a certain length near the tip (4) inside the cored bar (3) has a double-pipe structure, and a structure that can be heated from the inside by passing a heat medium such as steam into the gap between the double pipes. Is desirable.

(7) is an inner rubber servicer (7) for winding a lining rubber tape (8) on a conveyor tape (5) outside the cored bar (3). As the lining rubber tape (8), a rubber tape obtained by laminating a raw rubber tape and a vulcanized rubber tape is preferably used. The inner rubber servicer (7) is provided with a plurality of hourglass guides so that a seam is formed in the longitudinal direction with respect to the metal core (3), that is, in parallel with the axial direction of the metal core (3). The roller (9) is configured to be wound around the metal core (3) while pressing the rubber lining (8) so as to surround the metal core (3) around the metal core (3).

(10) is a mesh servicer that spirally winds a rubber netting tape (11) on an inner rubber tape (8) wound on a cored bar (3), and (12) is a reinforcing wire (13).
Wire servicer spirally wound on a rubber netting tape (11), (14) and (15) spirally wrap a reinforcing cord tape (16), each coated with raw rubber, on a wire (13) It is a code servicer to be wound.

Mesh servicer (10), cord servicer (1
4) and (15) both have substantially the same structure, and as shown in the example of the code servicer (14) in FIG. 5, two members firmly connected to each other by a plurality of connecting members (17). (18), a swivel (19) that is driven to rotate about the axis of the cored bar (3), and a tilt angle variable on the swivel (19) and the surface of the disk (18) Move along
It has an inclined base (20) fixed so as to be adjustable in position so as to approach and separate from the cored bar (3). A roll-shaped tape bundle (21) is rotatably arranged on the inclined base (20),
A liner tape (22) for preventing adhesion between winding layers of the reinforcing cord tape (16) coated with raw rubber is wound on the tape bundle (21) so as to overlap the reinforcing cord tape (16). (23) is a reinforcing cord tape (16) and a liner tape (22) that are simultaneously pulled out from the tape bundle (21).
Liner take-up roller for winding only the liner tape (22), (24) a guide roller for guiding the drawn-out reinforcing cord tape (16), and (25) for braking the running reinforcing cord tape (16). And a tension roller for applying tension to the tape (16) wound around the cored bar (3).

As shown in FIG. 4, the wire servicer (12)
A wire roll (27) is rotatably set on a disk-shaped swivel (26), and a tension roller (28) and a cored bar (3) for applying tension to a wire (13) drawn out from the wire bundle (27).
A press roller (29) is provided for holding the wire (13) wound on the upper rubber netting tape (11) without loosening.
The press roller (29) is arranged so that a plurality of rollers rotate in close contact with the wire (13) wound around the cored bar (3).

(30) is a pressure temporary tightening machine, and a temporary fastening tape (31) is tightly spirally wound on a winding layer obtained by laminating each tape on a cored bar (3), and is wound on a winding layer during vulcanization. It applies pressure. The pressure temporary tightening machine (30) is pulled out from the bundle of the temporary tightening tape (31) and wound in the same manner as the cord servicer (14), and after the rubber hose has been vulcanized, it is wound and wound. May be used again. However, the temporary fastening tape (31) wound by the winder (32) is wound by the winder (33), and the tape is continuously wound on the winder (32). It is preferable to circulate and use.

(34) is a vulcanization heat insulation tube (34), which is composed of a pair of semicircular double circular cylinders having a semicircular cross section, and is vertically divided into two parts as a whole, and is hinged (35) and cylinder (36). It is a cylindrical steam jacket that can be opened and closed.

(37) is a take-off machine that pulls out a heated and vulcanized pressure-resistant rubber hose (38) through a vulcanization heat insulation tube (34),
The rubber hose is pulled out while being gripped so as to be surrounded by a plurality of belt conveyors (39) extending around the rubber hose along the axial direction.

Pressure-resistant rubber hose (38) pulled out by the take-up machine (37)
The pulling speed detector (40) that generates a pulse proportional to the pulling speed of the pressure-resistant rubber hose (38), and the driving speed that detects the driving speed of the belt conveyor (39) of the pulling machine (37) Equipped with a detector (41), withdrawal speed detector (40)
The output of the drive motor (41) is compared with the output of the drive speed detector (41) to detect slippage of the belt conveyor (39) of the take-up machine (37) and to control the drive motor of the take-up machine (37) so that the pull-out speed is constant. Control the speed.

Mesh servicer (10), wire servicer (1
2), each cord servicer (14), (15), and each turntable (19), (26) of the pressure temporary tightening machine, each disk (18) is supported by four upper and lower support guide rollers (42). , A large-diameter gear (43) fixed to the disk (18), which is supported rotatably around the cored bar (3), and a gear (44) meshed with the large-diameter gear (43)
Are driven at different rotational speeds by separate drive motors (46) via a speed reducer (45) provided with.

The rotation speed of each of the swing tables (19) and (26) is controlled by the output of the pull-out speed detector (40) so as to be accurately proportional to the pull-out speed of the pressure-resistant rubber hose (38). For example, the output pulse of the withdrawal speed detector (40) is applied to each turntable (1
In addition to the proportional setter (47) provided in 9), an output pulse corresponding to a preset proportional constant is generated, and the output pulse is converted into a voltage by a pulse / voltage converter, respectively.
This is applied to the drive motor of each turntable (19) via the controller (48), and each turntable (19) is controlled at a speed controlled so as to be accurately proportional to the withdrawal speed of the pressure-resistant rubber hose (38). Drive turning.

Further, the drive of the pulse motor may be directly controlled by the output pulse of the proportional setter (47).

[Operation] In order to manufacture a rubber hose by the continuous apparatus for continuously manufacturing a pressure-resistant rubber hose of the present invention, it
An inner rubber servicer (7) directly wraps a lining rubber tape (8) in a spiral or longitudinal direction directly onto the conveyor tape (5) so that no gap is formed.

The rubber lining tape (8) wound on the conveyor tape (5) on the metal core (3) is pulled together with the conveyor tape (5) in the direction of the tip part (4) of the metal core (3), so that the core metal (3) is pulled. While sliding in the axial direction, a rubber netting tape (11) is spirally wound thereon from the mesh servicer (10). Further, a wire (13) is spirally wound thereon by a wire servicer (12). Rubber netting tape (1
1) and the wire (13) may be omitted in some cases.

Cord servicer (14) on the wire (13),
(15) The reinforcing cord tape (16) is wound in a spiral shape with a plurality of layers in different spiral directions. As the reinforcing cord tape (16), a tape obtained by arranging reinforcing fiber cords made of nylon, polyester, wire or the like in the longitudinal direction of the tape and weaving them in the width direction of the tape and coating the raw rubber is used.

A temporary fastening tape (31) is further spirally wound around the outside of the reinforcing cord tape (16), and each wound layer is pressed from the outside.
In this state, the entire winding layer is slid in the axial direction on the core metal (3) together with the conveyor tape (5), and is passed through a vulcanization heat insulation tube (34). It is heated from the outside inside the vulcanization insulation tube (34),
At the same time, it is preferable to flow a heat medium such as steam into the core metal (3) to heat the core metal (3) from the inside of the wound layer.
130-170 ° C by simultaneous heating from inside and outside, preferably 140
It is quickly heated to a vulcanization temperature of ~ 150 ° C and vulcanized.

After removing the temporary tightening tape (31) from the vulcanized pressure-resistant rubber hose that has exited the vulcanization heat insulation tube (34), the pressure-resistant rubber hose (38) is removed from a plurality of belt conveyors (39) of a take-off machine (37).
And pulled out in the axial direction of the metal core (3). The tip (4) of the core bar (3) extends to the position of the take-up machine (37), and the conveyor tape (5) that has moved with the rubber hose to the tip (4) of the core bar (3) is The distal end (4) of the gold (3) is peeled off from the lining rubber on the inner surface of the pressure-resistant rubber hose formed by vulcanization and returns to the base end (2) through the cylinder of the metal core (3).

In the manufacturing process of the pressure-resistant rubber hose, the core metal (3)
The wound layer wound above is pulled by the take-up machine (30), and slides and moves with the conveyor tape (5) toward the tip of the cored bar (1). No driving force is applied, but the frictional force between the conveyor tape (5) and the surface of the cored bar (3) is small, so that even if the core is tightened with a large pressure from the outside, the core with the outer wound It can slide relatively lightly on the gold (3) surface.

When the respective tapes are sequentially wound spirally on the cored bar (3), the winding must be moved in the axial direction on the cored bar (3) so that the tape can be wound spirally uniformly without wrinkling. Exactly between the velocity V, each velocity ω of the turntable (19) of each servicer, the radius r of the winding layer of that part, and the inclination angle θ of the tape wound spirally, V = ω r tanθ (1) It is necessary to adjust the pull-out speed of the take-off machine (37) and the rotation speed of the turntable (19) of each servicer so that the relationship holds.

Since the slippage always occurs between the belt conveyor (39) of the take-up machine (37) and the pressure-resistant rubber hose (38), it is difficult to keep the pull-out speed of the rubber hose at a completely constant speed. Rubber hose (3
8) Detect the withdrawal speed of each servicer and turn table (1
By controlling the rotation speed of 9) in accordance with the fluctuation of the drawing speed so as to be exactly proportional thereto, the rotation speed can always be adjusted to satisfy the expression (1).

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to the continuous manufacturing method and apparatus of the pressure-resistant rubber hose of this invention, a pressure-resistant rubber hose can be manufactured continuously, and a long-length pressure-resistant rubber hose of arbitrary length can be manufactured freely as needed. The laminated rubber sheet and the reinforcing cord layer can be vulcanized while being tightened with a large pressure, and a rubber hose having excellent pressure resistance can be manufactured. By precisely controlling the winding speed of each rubber tape as a raw material, each rubber tape can be accurately wound spirally, and a pressure-resistant rubber hose having excellent quality can be manufactured.

[Brief description of the drawings]

FIG. 1 is a plan view of an example of the apparatus for continuously manufacturing a pressure-resistant rubber hose of the present invention, FIG. 2 is a view of the side view taken along arrow AA, FIG. 3 is a front view of a cored bar, FIG. Is the code servicer's BB
Arrow view, FIG. 6 is a CC view of the wire servicer, FIG.
The figure is a block diagram of an example of the rotation speed control mechanism of the turntable of each servicer. (1) Stand, (2) Base end, (3) Core bar, (4) Tip end, (5) Conveyor tape, (6) Guide hole, (7) )… Inner rubber servicer, (8)… rubber liner, (9)… hourglass guide roller, (10)… mesh servicer, (11)… rubber netting tape, (12)… wire servicer , (13)… wire, (14), (15)… cord servicer, (16)… reinforced cord tape, (17)… connecting member, (18)… disk, (19)… turning Table, (20)… Inclined stand, (21)… Tape bundle, (22)… Liner tape, (23)… Liner winding roller, (24)… Guide roller, (25)… Tension roller, (26)… Disc-shaped swivel, (27)… Wire bundle, (28)… Tension roller, (29) Hold-down roller, (30) Temporary pressure tightening machine, (31) Temporary tightening tape, (32) Winding machine, (33) Winding machine, (34) ... Vulcanized thermal insulation tube, (35) ... hinge, (36) ... cylinder, (37) ... take-off machine, (38) ... pressure-resistant rubber hose, (39) ... belt conveyor, (40) ... Draw speed detector, (41) Drive speed detector, (42) Support guide roller, (43), (44) Gear, (45) Reducer, (46) Drive motor , (47)… Proportional setting device, (48)… Controller.

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29L 23:00

Claims (4)

(57) [Claims] 1. A method for manufacturing a pressure-resistant rubber hose, comprising: lining a rubber tape, a plurality of rubber-coated reinforcing cord tapes and, if necessary, other reinforcing members on a cylindrical core metal, winding, heating and vulcanizing and molding. Surrounding the peripheral surface of the metal core with a conveyor tape extending in the axial direction of the metal core and slidable in the axial direction of the metal core,
An inner rubber tape is wound on a core surrounded by the conveyor tape, and the inner rubber tape wound on the core is slid together with the conveyor tape on the core in the axial direction of the core while the inner rubber tape is slid. A plurality of layers wound in a spiral around a mesh or cloth tape coated with raw rubber on the core, and a tape for temporary fastening is further spirally wound on the wound layer, and then wound on the cored bar. After the whole is continuously passed through the heating zone and continuously vulcanized and formed, the tape for temporary fastening is removed, and the conveyor tape is continuously peeled off from the inner surface of the formed pressure-resistant rubber hose. Continuous production method of pressure-resistant rubber hose. 2. The vulcanized pressure-resistant rubber hose is gripped and pulled out in the axial direction of the metal core, whereby the entire winding layer on the metal core is slid in the axial direction of the metal core, and at the same time, the mesh or cloth tape is The net or cloth tape is pulled out from the bundle while rotating the bundle around the core bar around the axis of the core bar, and this is sequentially spirally wound on a winding layer already wound on the core bar. 2. The winding speed of the net or cloth tape is controlled by adjusting the rotation speed of the net or cloth tape bundle around the core metal so as to be proportional to the drawing speed of the pressure-resistant rubber hose. A continuous production method of the pressure-resistant rubber hose described in the above. 3. A method for manufacturing a pressure-resistant rubber hose, comprising: lining a rubber tape, a plurality of rubber-coated reinforcing cord tapes and, if necessary, other reinforcing members on a cylindrical core metal, winding, heating and vulcanizing and molding. By fixing the base end to the gantry, the whole is supported horizontally, and a plurality of conveyor tape insertion guide holes are arranged at equal intervals along the circumferential direction at the base end and near the end, respectively. A metal core having an endless conveyor tape that is arranged along the outside and inside of the cylindrical metal core through the guide hole at the base end portion and the guide hole at the distal end portion and that is continuous in an annular shape; and a base end of the metal core. A lining rubber tape wrapping means for wrapping a lining rubber tape on the conveyer tape of a cored bar, and a mesh or cloth tape coated with raw rubber on the lining rubber tape wrapped on the cored bar in a plurality of layers sequentially in a spiral manner. wear Tape winding means, heating means for heating and vulcanizing the entire plurality of winding layers wound on the core metal from outside the winding layer, and pressure-resistant rubber hose vulcanized and molded on the core metal Is gripped from the outside at the tip of the core bar and pulled in the axial direction of the core bar, and the entire winding layer wound on the core bar is slid in the axial direction of the core bar together with the conveyor tape on the surface of the core bar. A winding means for spirally winding a tape for temporary fastening on a winding layer on a core metal at an entrance of the heating means, and winding off the tape for temporary fastening at an exit of the heating means. And a pressure-resistant rubber hose continuous production apparatus. 4. The tape wrapping means includes a swivel that is driven to rotate about the core bar, and a tape bundle that is rotatably fixed to the swivel and pulls out a tape. ,
A pull-out speed detecting means for the pressure-resistant rubber hose pulled out by the pull-out means, and a control means for controlling the rotation speed of the turntable of each tape winding means in proportion to the pull-out speed detected by the pull-out speed detecting means. The continuous apparatus for continuously manufacturing a pressure-resistant rubber hose according to claim 3.