JPH0643103B2 - Heating core for continuous production equipment for pressure-resistant rubber hoses - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention wraps a cord-reinforced raw rubber tape around a core metal and continuously extrudes and heats it to continuously vulcanize and form a pressure-resistant rubber hose. The present invention relates to a structure of a cored bar having a heating part for

[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 on a steel pipe of a certain length, and a raw rubber tape reinforced with a fiber cord is spirally wound on it. In the multi-layer winding, in the state where the temporary fastening tape was further spirally wound and the multiple rubber tape layers were fastened, the steel pipe was passed through a heating furnace for vulcanization to vulcanize the rubber. After that, it is manufactured by a method in which the molded rubber hose is extracted from the steel pipe.

[Problems to be Solved by the Invention] According to the conventional method for manufacturing a pressure-resistant rubber hose, only a rubber hose having a constant length substantially equal to the length of the steel pipe to be the core can be manufactured, and a long pressure-resistant rubber hose can be manufactured. Unable to manufacture rubber hoses. Winding, vulcanization of rubber tape on steel pipes,
Each extraction process is a batch-type work, continuous work is not possible, and work efficiency is low. Further, since heating in the vulcanization step is performed from the outside of the steel pipe around which the rubber tape and the temporary fastening tape are wound, a thick pressure-resistant rubber hose has a drawback that it takes a long time for vulcanization.

Therefore, it is an object of the present invention to provide a core metal for producing a pressure resistant rubber hose that can continuously produce a pressure resistant rubber hose and can shorten the vulcanization time thereof.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the inventors of the present invention have conducted extensive studies, and as a result, provided a large number of conveyor tapes with good sliding along the axial direction of the core metal on the entire circumference of the surface of the core metal from the core metal surface. The raw rubber tape, which is the raw material, is spirally wound around this conveyor tape, and the raw rubber tape is wound around the conveyor tape in an axial direction with respect to the core metal. It is possible to continuously produce a long pressure-resistant rubber hose by continuously heating and vulcanizing it while sliding and moving it continuously on the core metal. The core metal wound with this raw rubber tape is heated for vulcanization. The rubber tape wound around the core is heated at the same time from inside and outside by arranging it in the pipe and heating the heating medium through a heating medium between the double pipes by making the core metal itself into a double pipe structure and vulcanization molding in a short time. Can It found that it is possible to increase the production efficiency of the rubber hose, thereby completing the present invention.

That is, the present invention is a substantially cylindrical shape of a pressure-resistant rubber hose manufacturing apparatus in which an inner lined rubber tape, a plurality of rubber-covered reinforcing cord tapes, and optionally other reinforcing members are laminated on a core metal, wound, heated, and vulcanized and molded. In the core metal, a plurality of guide holes for inserting the conveyor tape are provided at equal intervals along the circumferential direction in the vicinity of the base end portion and the tip end of the core metal, and the guide holes and the tip end of the base end portion are provided. An endless conveyor tape which is annularly arranged and is arranged along the outer side and the inner side of the cylindrical cored bar through part guide holes, and at least a part of the cored bar is a double cylinder. A heating core of a pressure-resistant rubber hose continuous manufacturing apparatus is characterized in that the gap forms a heating portion and has a heating medium flow path communicating from the heating medium inlet and the heating medium outlet to the heating portion.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partial cross-sectional view of an example of a cored bar of the present invention, FIG. 2 is a front view of the cored bar of FIGS. 3 to 11, and FIG. 12 is a sectional view of the cored bar of the present invention. 1 is a schematic plan view of an example of a device.

The cored bar (1) of the present invention has a substantially cylindrical shape, is fixed to the mount (3) only at the base end (2), and is supported horizontally. Guide holes for inserting the conveyor tape are provided along the circumference in the vicinity of the front end (4) and the base end (2) of the core metal (1).
It is provided in a row. This guide hole will be described later.
It is a guide hole for inserting and circulating an endless conveyor tape with good slip.

Out of the two rows of guide holes of the core metal (1) and the tip portion (4), the tip-side outer running tape guide holes (5) are annularly arranged at a position closer to the tip and the tips are annularly arranged in parallel therewith. The inner running tape guide holes (6) are displaced from each other, that is, the inner running tape guide holes (6) are arranged at positions corresponding to the gaps of the outer running tape guide holes (5). ing. There are multiple guide holes in each row (8 in the example of FIG. 1).
It is provided radially through the core metal (1) at equal intervals. The tip-side outer running tape guide hole (5) may not be a through hole but may have a groove shape cut from the tip of the core metal (1).

In the vicinity of the core metal (1) base end portion (2), the base end outside running tape guide hole (7) and the base end inside running tape guide hole (8) are arranged in parallel, respectively. Of the eight guide holes, five base end outside running tape guide holes (7) and four base end inside running tape guide holes (8) are arcuately parallel to each other of the core metal (1). It is located near the base end, and the remaining three outer guide tape guide holes (7) on the base end and four inner guide tape guide holes (8) on the base end are slightly on the tip of the core metal (1). They are arranged in arcs parallel to each other at positions displaced in the direction. The arrangement of the guide holes at the base end is as described later, and the core metal (1)
This is an arrangement for providing an inlet / outlet for supplying a heating medium to the heating section therein without hindering the traveling of the conveyor tape.

A conveyor tape (9) having a width substantially equal to the width of the guide hole is sequentially inserted into each guide hole near the tip (4) and the base end (2) of the core metal (1). That is, the conveyor tape (9) is inserted through the base end outside running tape guide hole (7a) from the inside to the outside, then advances along the surface of the core metal (1), and the tip outside running tape guide hole (5a) is placed outside. From the inside to the inside, then return along the inner surface of the core metal (1), and the base end inside running tape guide hole (8a), the tip inside running tape guide hole (6a), the base outside running tape guide hole ( 7b), tip outer running tape guide hole (5b),
Running tape guide hole (8b) inside the base end, running tape guide hole (6b) inside the tip end, running tape guide hole (7) outside the base end
c), tip outside running tape guide hole (5c), base end inside running tape guide hole (8c), tip inside running tape guide hole
Insert all the guide holes in the order of (6c) …… and finally join the end of the conveyor tape (9) to the tip of the conveyor tape (9) to make one endless annular tape. .

The tape from the outer tape run guide hole (7) to the outer tape guide hole (5) on the outer end of the base is taped from the inner guide tape guide hole (8) on both sides of the tape to the inner tape guide hole. The outside of the tape to (6) is arranged so that a part of its width overlaps with each other, and the outer and inner surfaces of the cylindrical core metal (1) have its tip (4) and base (2). The whole surface except a very small part of () is covered with a conveyor tape (9) extending in the axial direction.

As described above, instead of forming the entire conveyor tape (9) as one annular endless tape, the base end outer running tape guide holes (7) and the tip outer running tape guide holes (5) located at opposite positions. Alternatively, the conveyor tape (9) that passes only each of the base end inside running tape guide holes (8) and the tip end inside running tape guide hole (6) can be an independent annular endless tape. If a single annular endless tape is used, the tension of the entire conveyor tape (9) will be averaged, an excessive load will be applied to some of the conveyor tapes (9), and there is no risk of early wear damage.

The conveyor tape (9) is a tape that has a small coefficient of friction on the surface and a small sliding resistance between the surface of the core metal (1) and low slip energy, and adheres to the surface under pressure. A heat-resistant tape having good peelability of rubber vulcanized and molded and excellent in strength is used. For example, a fluororesin tape in which a cloth of aromatic polyamide fiber is buried and reinforced is preferably used.

At least a portion of a fixed length in the core metal (1) near the tip (4) has a double pipe structure composed of an inner pipe (10) and an outer pipe (11),
A heating medium such as steam is made to flow into an annular gap between the inner pipe (10) and the outer pipe (11) to form a heating unit (12). A heat medium flow path (15) is provided from the heat medium inlet (13) and the heat medium outlet (14) provided at the base end (2) of the core metal (1) to the heating unit (12).

The cylindrical cored bar (15) passes through the heat medium inlet (13) and the heat transfer medium outlet (14) through arcuate flow paths (16) along the circumferential direction of the cored bar (1), respectively, and the axial direction of the cored bar (1). Through the axial flow path (17)
You are familiar with (12). In the example shown in FIG. 3 to FIG.
For the convenience of the processing and assembly of (1), the axial flow path (17) is divided into two stages, and the arcuate flow path (16) is further sandwiched between them.

By providing the heat medium passage (15) as described above, the heat medium inlet (13) and the heat medium outlet (14) are arranged at positions that do not hinder the traveling of the conveyor tape (9), and the heat medium passage ( 15) can be placed between two sheets of conveyor tape (9) which move along the outer and inner surfaces of the cored bar (1).

[Action]

To manufacture a pressure-resistant rubber hose using the core metal (1) of the present invention in a pressure-resistant rubber hose continuous manufacturing apparatus, as shown in FIG. 0, a conveyor tape is provided near the core metal (1) base end (2). Directly wrap the inner rubber servicer (18) with the lining rubber tape (19) directly on the (9) without any gaps.
The lining rubber tape (19) may be spirally wound or may be vertically wound so that one seam is formed in the axial direction.

The lining rubber tape (19) is preferably formed by laminating a raw rubber sheet and a vulcanized rubber sheet one by one and winding the raw rubber with the raw rubber facing outward.

Inner rubber tape (19) wound on the conveyor tape (9) on the core metal (1) together with the conveyor tape (9) The tip of the core metal (1)
While pulling in the direction (4) and sliding on the cored bar (1) in the axial direction, a rubber net (21) is spirally wound on the cored bar (1) by a mesh servicer (20). Further, a reinforcing wire (22) is spirally wound around it by a wire servicer (23). The rubber net tape (21) and the reinforcing wire (22) may be omitted in some cases.

Cord servicer (24) on the reinforcing wire (22),
The reinforcing cord tapes (26) and (27) are wound from (25) in a plurality of layers in a spiral shape while changing the spiral direction. The reinforcing cord tape is a tape obtained by arranging reinforcing fiber cords in the longitudinal direction of the tape and forming a taper weave in the width direction of the tape and covering the raw rubber.

Temporary fastening tape (28) on the outside of the reinforcing cord tape (27)
Is spirally wound and each winding layer is pressed from the outside. In this state, the entire wound layer is slid on the cored bar (1) along with the conveyor tape (9) in the axial direction thereof and passed through the vulcanization heat insulation pipe (29). The core metal (1) is heated from the outside in the vulcanization heat insulation pipe (29) and at the same time, a heating medium (12) inside the core metal (1) is caused to flow a heating medium such as steam.
Also heat from the inside of the upper winding layer. Simultaneous heating from inside and outside allows rapid heating to a vulcanization temperature of 130 to 170 ° C, preferably 140 to 155 ° C, and vulcanization molding.

It is preferable that the heating range of the heating section (12) is from slightly before the inlet of the vulcanization heat insulation pipe (29) to the outlet of the vulcanization heat insulation pipe (29).

The vulcanized pressure-resistant rubber hose exiting the vulcanization heat-insulating pipe (29) is pulled out by a take-up machine (30) which is carried by being sandwiched by a plurality of belt conveyors. The core metal (1) up to this take-up machine (30)
The tip (4) of the core bar (1) extends, and the conveyor tape (9) that has moved to the tip (4) of the core metal (1) together with the rubber hose is vulcanized and molded at the tip (4) of the core metal (1). It is peeled off from the lining rubber on the inner surface of the pressure-resistant rubber hose, and passes through the cylinder of the core metal (1) and returns to the base end (2).

From the vulcanized rubber hose pulled out by the take-off machine (30),
Take off the temporary fastening tape (28) to obtain the product.

In the manufacturing process of the pressure-resistant rubber hose, the winding layer wound around the core metal (1) is pulled by the take-up machine (30) and slid in the tip direction of the core metal (1) together with the conveyor tape (9). Move
Although no driving force is applied to the conveyor tape (9) itself from the inside, the frictional force between the conveyor tape (9) and the surface of the cored bar (1) is small, and therefore the winding layer is tightened from the outside with a large pressure. Even if it is left as it is, it can slide relatively lightly on the surface of the core metal (1) together with the outer winding layer.

〔The invention's effect〕

According to the heating core of the continuous pressure-resistant rubber hose manufacturing apparatus of the present invention, the pressure-resistant rubber hose can be continuously manufactured, and a long pressure-resistant rubber hose can be freely manufactured as required. The laminated rubber sheet and the reinforcing cord layer can be vulcanized and molded while being tightened with a large pressure, and a rubber hose having excellent pressure resistance can be manufactured.

It is possible to simultaneously heat the inside and outside of the vulcanization molded re-rubber hose, which can shorten the vulcanization time and increase the production efficiency. Further, the entire layer of the laminated rubber hose is vulcanized both inside and outside under uniform vulcanization temperature conditions, and the whole can be vulcanized and molded under optimum vulcanization conditions, so that a product of excellent quality can be obtained.

[Brief description of drawings]

FIG. 1 is a partial sectional view of an example of a cored bar of the present invention, FIG. 2 is a front view thereof, FIG. 3 is an enlarged AA sectional view of FIG. 4, FIG. 4 is a sectional view of BB thereof, and FIG. A sectional view, FIG. 6 is a sectional view of the same DD,
FIG. 7 is the same EE sectional view, FIG. 8 is the same FF sectional view, FIG. 9 is the same GG sectional view, FIG. 10 is the same HH sectional view, FIG. 11 is the same II sectional view, and FIG. 1 is a schematic plan view of an example of a continuous pressure-resistant rubber hose manufacturing apparatus using the cored bar of the invention. (1) …… core metal, (2) …… base end, (3) …… stand, (4) …… tip part, (5) …… tip end outside running tape guide hole, (6) …… Inner tip running tape guide hole, (7) …… Outer end tape guide hole, (8) …… Inner tip running tape guide hole, (9) …… Conveyor tape, (10) …… Inside Tube, (11) …… Outer tube, (12) …… Heating part, (13) …… Heating medium inlet, (14) …… Heating medium outlet, (15) …… Heating medium passage, (16)… … Arc channel, (17) …… Axial channel, (18) …… Inner rubber servicer, (19) …… Inner rubber tape, (20) …… Mesh servicer, (21) …… Rubber mesh tape , (22) …… Reinforcing wire, (23) …… Wire servicer, (24), (25) …… Cord servicer, (26), (27) …… Reinforcing cord tape, (28) …… Temporary tightening Tape, (29) …… Vulcanization insulation tube, (30) …… Take-off machine.

Claims (1)

[Claims] 1. A substantially cylindrical shape of a pressure-resistant rubber hose manufacturing apparatus for laminating an inner lined rubber tape, a plurality of rubber-covered reinforcing cord tapes, and optionally other reinforcing members on a core metal, winding, heating and vulcanizing. In the core metal, a plurality of guide holes for inserting the conveyor tape are provided at equal intervals along the circumferential direction in the vicinity of the base end portion and the tip end of the core metal, and the guide holes and the tip end of the base end portion are provided. An endless conveyor tape which is annularly arranged and is arranged along the outer side and the inner side of the cylindrical cored bar through part guide holes, and at least a part of the cored bar is a double cylinder. A heating mandrel of a continuous pressure-resistant rubber hose continuous production apparatus, characterized in that the gap forms a heating portion, and has a heating medium passage communicating from the heating medium inlet and the heating medium outlet to the heating portion.