JPH0363510B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus for manufacturing a flexible rubber hose incorporating a mesh-like and spiral-like reinforcing material.

<Prior art> There are various types of devices for manufacturing flexible tubes.
For example, as in the pipe manufacturing apparatus described in Japanese Patent Publication No. 36-13932, a rod-shaped material is moved forward while being rotated in a spiral direction around a plurality of inner rollers, and is pressed by an outer roller. In this way, a tubular body is manufactured by bonding adjacent spiral materials together by adhesion, welding, winding, etc., and an apparatus for manufacturing a thermoplastic synthetic resin flexible tube described in Japanese Patent Publication No. 12920/1983 is used. In this method, a plurality of rotating rollers arranged in a cone-shaped manner are used to feed an unhardened synthetic resin strip in a spiral direction through the outside of the rollers, while the rollers are tilted so as to spread out. Then, the spirally wound uncured strip is pushed out from the inside,
There is one in which the overlapping portions of the strip are adhered by the pressure. However, in the case of manufacturing pipes made of synthetic resin, it is possible to manufacture them in one step, but in the case of manufacturing pipes made of materials that require vulcanization of rubber, it is necessary to make them at an appropriate length. It is necessary to cut it, put it in a vulcanization tank, and perform vulcanization treatment, which makes it difficult to manufacture long tubes and limits the length of the tube.

In addition, in order to reinforce the tube, there is also a device that incorporates a mesh-like reinforcing thread between the inner surface of the tube and the outer surface of the tube (for example, Japanese Patent Publication No. 46-25275), but like the above device, it can be done in one step. Since vulcanization could not be carried out, it was not possible to manufacture long pressure- and oil-resistant hoses from rubber.

<Object of the invention> In view of the above problems, the present invention forms an inner tube and an outer tube with one device, and interposes a mesh-like and spiral-shaped reinforcing material between the inner tube and the outer tube, At the same time, it is an object of the present invention to provide an apparatus for manufacturing a pressure-resistant, oil-resistant, etc. rubber hose made of vulcanized rubber.

<Structure of the Invention> The present invention includes a roller that forms an inner tube, a driving device for the roller, and a large number of rollers that protrude from the inside of the roller into the center of the inner tube and perform vulcanization from the inside of the inner tube. A blowout nozzle having a hole, a coiling device for winding a spiral reinforcing spring around the outer circumferential surface of an inner tube, a spiral braiding machine for winding a mesh reinforcing thread, an outer tube covering the outer circumferential surface, and the above-mentioned inner tube. An extruder and shear head that supplies the hose material for the tube, a tightening feeder that is inclined at a predetermined angle with respect to the central axis of the hose, a vulcanizing device that vulcanizes the outer tube from the outside, a cutting machine, and a pulling machine. and peripheral equipment consisting of a cooling water tank, etc.

<Example> Hereinafter, the rubber hose manufacturing apparatus of the present invention will be explained in detail with reference to the illustrated example.

FIGS. 1a and 1b are block diagrams schematically showing a rubber hose manufacturing apparatus of the present invention, which includes a roller 1 and its drive device 2, extruders 3a and 3b that supply materials for the inner tube and outer tube, respectively. Sea head 4a, 4b
, a coiling device 6 for winding a spiral reinforcing spring, a spiral braiding machine 7 for winding a mesh reinforcing thread, a tightening feeding device 8, a cooling tank 10, a cutting machine 11, and a pulling machine (not shown). A blowing nozzle 5 that performs vulcanization at the same time as forming the inner tube, which is the gist of the present invention, and a vulcanizing device 9 that performs vulcanization at the same time as forming the outer tube. .

The roller 1 has a spiral band shape and a cylindrical shape that gradually expands forward. The extruder 3 is rotatably driven by a drive device 2 consisting of
The rubber tube material extruded from a is transferred to the shear head 4.
The strip heated to a predetermined temperature in step a is rolled up in a spiral and sent forward, and a pressing force is applied from the inside to the outside to press the adjacent strips together to form an inner tube. Note that the shape of the roller 1 is not limited to the above embodiment, and may be a plurality of rod-shaped bodies disposed in a cylindrical shape that gradually expands forward at appropriate intervals, or other configurations may be used. However, it is fine as long as it can achieve the same effect. At the same time as forming the inner tube, heating is performed by blowing out hot air etc. generated by the heating device 5a from the blowing nozzle 5 provided near the central axis of the virtual circle formed by the roller 1 to cause a crosslinking reaction. , changes the inner tube material having plasticity into an elastic body.

The blow-off nozzle 5 is a cylindrical body and has a large number of holes around its periphery, and the number of holes is increased toward the tip, or the diameter of the holes is increased to uniformly heat the nozzle. , so that vulcanization can be carried out. Further, heated fluid such as hot air heated and generated by the heating device 5a is sent to the blowing nozzle 5 via the connection and power transmission mechanism of the drive device 2 of the roller 1. At this time, since the components of the connection/power transmission mechanism themselves are heated, they are cooled by appropriate means.

The coiling device 6 uses a forming roller 6a to form a wire material such as a wire, a piano wire, or a band into a spring shape with a diameter slightly smaller than the outer diameter of the inner tube, and then uses a winding roller 6b to form the wire material into a spring shape with a forming roller 6a. A reinforcing spring is wound around the outer circumferential surface of the inner tube. The spiral braiding machine 7 uses a driving device 7 such as a motor to move a plurality of threads, for example, 6, 8, 12, 16, etc., arranged at appropriate positions.
b, 7b are rotationally driven, and the thread windings 7a, 7a...
A reinforcing thread such as rayon thread, nylon thread, Tetoron thread, hemp thread, etc. is sent out from the inner tube and wound in a mesh pattern over the spring wound around the outer circumference of the inner tube.

The extruder 3b and the shear head 4b feed out the outer tube material and wind it so as to cover the inner tube around which the reinforcing spring and reinforcing thread are wound from the outside.

The tightening feed device 8 has a plurality of rollers 8a, 8a arranged at a predetermined angle with respect to the central axis of the tube, and is rotatably driven by a drive device 8b such as a motor to tighten the outer tube from the outside. The tube is compressed and tightened so that no air bubbles or gaps remain between the inner tube, reinforcing spring and reinforcing thread, and the outer tube, and the tube is sent forward.

The flushing device 9 is disposed so as to surround the outer circumference of the outer tube, and vulcanizes the outer tube by blowing hot air or by heating with a cartridge or other suitable heater.

The cooling water tank 10 has guide rollers 10a, 10a, and cools the tube heated by the vulcanizer 9 or the like.

The cutting machine 11 has movable cutting teeth or other cutting means, and cuts the tube to a predetermined length while moving at the same speed as the tube.

The cut tube is transported to the next step by a transport means (not shown) such as a take-up machine or a transport conveyor.

Incidentally, a vulcanizing agent, a curing agent, a reinforcing agent, a protective material, etc. are mixed in the inner tube and outer tube materials in advance.

<Function> In the rubber hose manufacturing apparatus of the present invention having the above configuration, first, the inner tube material extruded from the extruder 3a is heated to a predetermined temperature in the shear head 4a,
Wind it around roller 1 in a spiral shape. roller 1
While rotating, the inner tube material is sent forward, extruded from the inside to the outside, and adjacent inner tube materials are crimped together to form an inner tube, and hot air etc. are blown out from the blowing nozzle 5 to blow out the inner tube material. The inner wall surface of the tube is heated to perform vulcanization. Next, a reinforcing spring is spirally wound around the outer peripheral surface of the inner tube using a coiling device 6, and then a spiral braiding machine 7
The reinforcing thread is wound in a mesh pattern. Finally, the outer tube material extruded from the extruder 3b is heated by the shear head 4b, wound around the inner tube, the reinforcing spring and the reinforcing thread, and tightened by the tightening and feeding device 8, and then by the vulcanizer 9. After vulcanization, the inner tube, reinforcing spring and reinforcing thread are strongly adhered to the outer tube to create a rubber hose. After this rubber hose is cooled in a cooling water tank 10, it is cut into an appropriate length by a cutting machine 11, and then transported by a conveying means to a place where the next processing is performed.

FIG. 2 is a cross-sectional view of a rubber hose manufactured by the above-mentioned manufacturing apparatus of the present invention.
and an outer tube part D, but the inner tube part A and the outer tube part D have no boundary and are fused, and the hose itself has a reinforcing spring B and a reinforcing thread C built-in.
It has an integrated structure. Here, the reinforcing yarn C does not need to be wound if it is not necessary, and the manner in which it is wound is not limited to the mesh shape. Further, the positions of the reinforcing thread C and the reinforcing spring B may be switched. Furthermore, even if the inner tube material and outer tube material are the same,
Or it may be of a different type. However, the reinforcing spring B needs to have enough strength to withstand the tightening force of the tightening roller 8a of the tightening feeder 8.

<Effects of the Invention> The rubber hose manufacturing apparatus of the present invention having the configuration and operation described above can perform vulcanization at the same time as forming the inner tube, and simultaneously perform vulcanization at the same time as coating the outer tube. Since these steps can be performed continuously in one device, rubber hoses that require vulcanization can be manufactured continuously, and long hoses can be manufactured.

In addition, by incorporating a reinforcing spring, even if the outer tube is tightened from the outside with a tightening roller,
The tube does not deform, and there are no air bubbles or gaps between the inner tube, reinforcing springs, reinforcing threads, and outer tube, and the adhesion is extremely good. It is possible to obtain sufficient strength as a rubber hose, and it is possible to save materials and reduce costs.

[Brief explanation of drawings]

FIGS. 1a and 1b are schematic configuration diagrams showing one embodiment of the rubber hose manufacturing apparatus of the present invention, and FIG.
1 is a plan view, FIG. 1B is a side view, and FIG. 2 is a cross-sectional view showing one embodiment of a rubber hose manufactured by the manufacturing apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Roller, 2... Drive device, 3a, 3b... Extruder, 4a, 4b... Shear head, 5... Blowing nozzle, 6... Coiling device, 7... Spiral braiding machine, 8... Tightening feeding device, 9... Vulcanization device , 10...Cooling tank, 11...Cutting machine.

Claims (1)

[Claims] 1 A cylindrical roller that gradually expands in the front, a drive device that rotates the roller, an extruder and a shear head that supply the material for the inner tube, and a roller that simultaneously forms and vulcanizes the inner tube from the inside. A blowing nozzle that performs this, a coiling device that winds a reinforcing spring around the outer circumference of the inner tube that is being molded and vulcanized, a spiral braiding machine that winds reinforcing thread, and an extruder that supplies material for the outer tube. and a shear head, a tightening and feeding device that compresses and tightens the outer tube portion from the outside and sends it forward after coating the outer tube portion, and a vulcanization device that vulcanizes the outer tube portion from the outside,
A rubber hose manufacturing device that performs vulcanization at the same time as pipe forming.