JPS5859071A - Device for producing foldable synthetic resin hose with reinforcing member embedded therein - Google Patents

Abstract

PURPOSE:To provide the titled device capable of continuously producing an elongate hose with high quality, by a method wherein a warp provided with an adhesive is guided onto the outside surface of a hollow cylindrical body, braiding yarns are braided on the outside periphery of the warp to constitute a reinforcing member, and a synthetic resin is coated on the inside and outside surfaces of the reinforcing member. CONSTITUTION:The warp 5 is passed through a tank 14 containing an adhesive, and is guided onto the outside surface of the hollow tubular body 25 through a yarn guide hole 22. The braiding yarns 6 are braided on the outside periphery of the tubular body of the warp to form the reinforcing member consisting of a braid. This is heated by a heater 41 to adhere the warp to weft at intersecting points and heat-set the reinforcing member, and is directed into a resin working device 43 through a cooler 42. In the device 43, a synthetic resin is ejected through an extruding port 50 of an annular manifold 49 and is coated on the inside and outside surfaces of the reinforcing member. The resin is gelled by heating in a heater 56, and is cooled by blowing cooling air through blowing ports 61, 62.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention consists of warp yarns which are provided with an adhesive and are arranged in a ring shape, and a braided yarn which is overlapped and braided around the outer periphery of the warp yarns.
This relates to a device for manufacturing synthetic resin hoses in which a cylindrical reinforcing material is embedded where the contact points of warp threads and braided threads are joined, and its purpose is to enable the continuous production of extremely high-quality hoses. There is.

Conventionally, synthetic resin hoses with embedded cylindrical reinforcing materials have been manufactured by woven or knitted reinforcing materials in advance, kept in a cylindrical shape by various means, and coated with synthetic resin from the inside and outside, or by the weaving or weaving process. This is done in a separate process and requires the reinforcing material to be prepared in advance to a certain length, and since it is manufactured for each piece, it is not possible to obtain a product with standardized specifications and it is expensive. In recent years, in order to carry out continuous production, the braided layer is continuously braided into a cylindrical shape on a mandrel, and the braided layer is cylindrically braided using core yarns (warps) that are woven between the braided yarns and are under tension in the braiding direction. A manufacturing method in which a synthetic resin layer is continuously coated (Japanese Patent Application Laid-open No. 50-126)
No. 774) has been proposed, or the number of warp threads cannot be determined independently of the number of braided threads, and is always equal to 1 of the total number of braided threads.
/2 or less, making it difficult to maintain a perfect circle.During braiding, friction between the tensioned warp threads and the braided threads causes the tension in the braided threads to become uneven, which tends to disturb the stitches. It has the disadvantage of being easily cut.

The present invention has been devised to eliminate these drawbacks and to enable continuous production of long hoses with high quality in terms of dimensional stability, etc. A warp tubular body is formed by guiding the threads onto the outer surface of the hollow cylinder through guide holes and pulling them in the longitudinal direction of the hose to be formed, and a braided thread is braided around the outer periphery of this warp tubular body. A reinforcing body made of a braided body is formed, this is heated to bond the contact points between the warp and weft, the reinforcing body is heat-set, it is cooled, and the reinforcing body is led to a resin processing device to coat the inner and outer surfaces of the reinforcing body with synthetic resin. We have also invented a method for manufacturing a synthetic resin hose in which a reinforcing material is embedded so that the tube obtained by molding is pulled and rolled up while being cooled.

The present invention proposes an apparatus for carrying out the above-mentioned hose manufacturing method. a hollow cylindrical body that guides the warp in the axial direction and forms a warp tubular body; a braiding machine, a first heating device that surrounds the hollow cylindrical body and heat-sets the reinforcing body consisting of the warp tubular body and the braided body by bonding the contact points between the warp tubular body and the braided body; It consists of a resin processing device having a manifold and a die for coating the resin, and a cooling device for air-cooling the molded hose, and the hollow cylindrical body is located at a position facing the first heating device. The present invention relates to an apparatus for manufacturing a synthetic resin hose in which a reinforcing material having a tapered portion determined by the heat shrinkage rate of the braided yarn is embedded.

Hereinafter, the present invention will be explained in detail with reference to the illustrated embodiments.

FIG. 1 shows the basic structure of a synthetic resin hose according to the present invention. The synthetic resin hose 1 comprises an inner layer 2 and an outer layer 3, which can be made of soft polyvinyl chloride, and a reinforcement 4, which can be constructed from a polyester filament thread. This reinforcing material 4 has a plurality of warp threads 5 arranged in a ring shape extending in the longitudinal direction of the hose on the outer periphery of the inner layer 2, and is braided at an angle to the left and right with respect to the longitudinal direction of the hose on the outer periphery of these warp threads 5. It is constituted by a braided thread 6. The inner layer 2 and the outer layer 3 are bridged and integrated through the thread lattice gaps of the reinforcing material 4. As is clear from FIG. 2, which shows a part of the reinforcing material 4 developed, the braided yarn 6 is alternately braided with left-sloping threads and right-slanted threads, while the warp threads 5 are braided with braided threads 6. without being incorporated into. It is glued on top of this. This adhesion is carried out using an adhesive that has been applied to the warp threads in advance, as shown in FIG.

The synthetic resin hose according to the present invention can be manufactured by the following steps.

(1) Warp processing process As shown in Figure 4, warp threads 5 derived from multiple creels
In this step, the warp threads 5 are guided to the adhesive tank 14 while applying tension through guide rollers, and the warp threads 5 are coated with adhesive.

The adhesive used here is preferably an adhesive such as a solution of a synthetic resin material or a synthetic resin emulsion. The most important thing is that the adhesive attached to the warp threads should strongly adhere to the braided threads and be flexible.

(2) Braiding process The warp threads 5 to which adhesive has been applied are guided in a circular manner by a light diameter plate 27 provided with thread guide holes 29 on the outer surface of the hollow cylinder 25, and guided in the longitudinal direction of the hose to be formed. Step of pulling to form a warp tubular body, and while advancing this warp tubular body, sequentially braiding a plurality of braided threads 6 around the outer periphery of the warp tubular body to form a braided body to manufacture a reinforcing body to be embedded in the synthetic resin hose 1. It is.

In this process, the warp tubular body to which the adhesive is attached is braided under a constant tension on the outer periphery of the warp tubular body. Since the braid body synchronizes with the forward motion of the braid, a smooth braid can be formed in sequence. If no adhesive is applied here, the braided threads will separate and will not move in sync with the movement of the warp threads. Therefore, in the present invention, since the warp tubular body is guided and pulled by the hollow cylindrical body, the braiding direction can be made in any direction: upward, downward, or horizontal.

(3) Heat-setting process for reinforcing body A heating device 41 is provided to surround the reinforcing body during the movement process of the reinforcing body made in the previous step, and heats it to increase the adhesive force at the contact point between the warp threads 5 and the braided threads 6, thereby increasing the adhesive strength of the reinforcing body at the contact point between the warp threads 5 and the braided threads 6. This is a process of heat setting. The heating temperature at this time varies depending on the reinforcing agent used, or at least is higher than the temperature that evaporates the water in the reinforcing material, and lower than the softening point of the reinforcing material, and the heating time is approximately 30 seconds to 90 seconds. That's enough.

(4) Synthetic Resin Layer Coating Step This is a step in which the heat-set reinforcing body is not allowed to advance further, but is cooled and guided to the resin processing device 48, where the inner and outer surfaces of the reinforcing body are coated with synthetic resin.

(5) Heating step In this step, the synthetic resin coated on the inner and outer surfaces of the reinforcing body is heated and gelled.

(6) Cooling process In this process, the synthetic resin hose is cooled and solidified to complete the molding.

(7) Winding process In this process, the synthetic resin hose is wound under constant tension.

FIGS. 4 to 6 are explanatory diagrams of an apparatus for manufacturing the synthetic resin hose of the present invention through the above-mentioned steps.

In FIG. 4, reference numeral 11 indicates a bobbin creel as a winding frame for the warp threads 5. Bobbins with the required number of warp threads are prepared and mounted on the winding frame. The warp threads 5 let out from the bobbin creel 11 are put into the adhesive tank 14 under a required tension through the guide rollers 12, tension rollers 13, and guide rollers 15 provided in the adhesive tank 14. The adhesive is applied to the warp threads 5. The warp threads 5 to which the adhesive has been attached are further moved by guide rollers 16, 17,
18 to the lower part of the braiding machine main body 19.

The braiding machine 19 is supported by a support leg 20, and a first warping plate 23 having an opening 21 and a yarn guiding hole 22 is provided at the center thereof. This first warp driving plate 23 is a disk for arranging the warp threads 5 in a tubular shape and preventing the warp threads to which adhesive is attached from becoming entangled, and has an opening 21 in the center as shown in FIG.
The thread guide holes 22 are arranged concentrically with this at equal angular intervals.

A hollow cylindrical body 25 for guiding warp threads is vertically connected and supported to the first warping plate 23 via a hollow pinquet joint 24 . A second warping plate 27 integrated with the adjustment board 28 is fitted at a suitable position above the hollow face piece 25.

As shown in FIG. 6, the second warping plate 27 is a circular plate in which warp guide holes 29 are arranged at equal angular intervals on a circumference approximately corresponding to the desired diameter of the product. This is for constricting the tubularly arranged warp yarns that have passed through the guide holes 22 to the desired diameter of the product and guiding them onto the surface of the hollow cylinder body 25. The adjustment board 28 equalizes the tension of the plurality of braided threads 6 and guides the braided threads 6 around the outer periphery of the tubular body formed by the warp threads 5, thereby making it possible to arrange the stitches of the braided body regularly. The braiding mechanism of the braiding machine 19 has the above-mentioned supporting leg 20.
A large number of braided yarn bobbin feeding gears 32 meshing with each other in a planetary manner between a top plate 80 and a bottom plate 31 supported by Shafts 36, 36 of at least one pair of braided yarn hobbins 35, 35' are attached to two endless raceway grooves 34, 34' which meander inward and outward in the radial direction.
' are fitted, and the engaging part 37 protruding from the gear 32 engages with the hobbin shaft 36, and the plurality of braided yarn hobbins 35, 35'
is formed around the hollow cylindrical body 25 by alternating its position inside and outside along the endless raceway grooves 34, 34' and then making an annular meandering motion (blade motion) about the hollow cylindrical body 25. The braided yarn 6 is braided while rotating around the warp tubular body. 38 is a driving gear that meshes with the driving vehicle 33, and 89 is a motor. Figure 7 is the top plate 380
It shows the meandering state of two endless raceway grooves 34, 34' provided in the endless raceway grooves 34, 34', in which shafts 36, 36' of at least one pair of braided yarn bobbins 35, 35' are fitted, As the planetary gear 32 rotates, it is engaged with the engaging portion 37 protruding from the planetary gear 32 and is carried along, and the endless raceway grooves 34, 34
At the intersection point of ', the engagement with one gear engages with the engagement part of the next gear, respectively, and the braided yarn 6 is braided by rotating at equal speeds in opposite directions along the raceway grooves 34, 34'. It is.

In the braiding machine main body 19 configured as above,
The warp yarns 5 to which the thickener has been attached are arranged in an annular manner through the yarn guiding holes 22 of the first warping plate 23 and the yarn guiding holes 29 of the second warping plate 27.
When passing through, the warp threads 5 are guided along the outer periphery of the hollow cylindrical body 25 and on its surface in the axial direction, and as shown in FIG. 8, the warp threads 5 form a tubular body with the hollow cylindrical body 25 as a core. That is, the warp threads 5 are tensioned under constant tension, and the inner surface is a hollow cylinder 25.
A tubular body is formed in which each of the warp threads 5 is parallel to each other while being supported by the outer peripheral surface of the warp threads 5 . Since the braided thread 6 is braided on this warp tubular body, the warp thread 5 is not braided with the braided thread 6, so there is no friction between the warp thread 5 under tension and the braided thread 6.
The tension will be uneven and the braid will not be disturbed or the threads will break. Since the braided yarn 6 is braided onto the warp tubular body, the tubular braided bodies are placed one on top of the other with an adhesive interposed therebetween. In this state, it is guided to the next first heating device 41, and the contact points between the warp threads 5 and the braided threads 6 are strongly bonded, and the reinforcing body formed by the warp threads 5 and the braided threads 6 is passed through the tapered part of the hollow cylindrical body. In the meantime, the reinforcing body is heat-shrunk and heat-set, and the reinforcing body is cooled in the next cooling device 42, and then transferred to the resin processing device 43.
The inner and outer surfaces of the reinforcing body are coated with synthetic resin at these points. To achieve this purpose, a heating device 41, a cooling device 42, and a resin processing device 43 are sequentially arranged surrounding the hollow cylinder 25, and the hollow cylinder 25 is coated with resin at least on the inner and outer surfaces of the reinforcing body. should be extended until the coating is completed.

The resin-coated hose is gelled in the next second heating device 56, then cooled and wound to solidify it.

The hollow cylindrical body 25 is open at both ends as shown in FIG.
A tapered portion is formed at a position facing the first heating device 41, and a grooved portion 4 is formed at a position facing the resin processing device 43 at the upper end.
7 and a small diameter portion 48 are formed. The reason why the cylindrical body 25 is hollow is that the synthetic resin hose is held in a cylindrical shape by the high-temperature gas generated when the synthetic resin material is heated and gelled in the second heating device 41, but the excess of the high-temperature gas is This is because it is necessary to discharge the air from the opening 21 of the hollow cylinder 25 into the atmosphere.

The tapered portion 44 is tapered to an appropriate size determined by the shrinkage rate of the braided yarn 6 that is heat-shrinked while passing through the first heating surface 41. . This taper allows the braided thread 6 to move smoothly forward without being constrained on the hollow cylinder 25.

The first heating device 41 is configured to send hot air from a blower (not shown), and the surface of the hollow cylindrical body 25 is heated by the hot air, so that the warp threads 5 and the braided threads 6 are heated from the inner and outer surfaces 1. It will be heated. The effect of performing the first heating in this way is as follows.

(1) The moisture contained in the warp threads 5 and the braided threads 6 should be completely evaporated to prevent pinholes from forming in the product.

(2) The adhesive force at the contact point between the warp threads 5 and the braided threads 6 to which the adhesive has been applied is further increased.

(3) Since the heating is performed at a temperature lower than the softening temperature of the warp threads 5 and the braided threads 6 and higher than the heating temperature by the second heating device 56, the reinforcing body remains taut on the surface of the hollow cylindrical body 25. Since the reinforcing body can be stored at a constant shrinkage rate determined by the first heating temperature in the state, a so-called shrink heat treatment effect can be obtained, so that the reinforcing body does not undergo any thermal shrinkage when passing through the second heating device 56. For this reason, a uniform product with high dimensional stability and no internal distortion can be obtained.
This has the effect that the dimensions of the small diameter portion 48 can be made constant with respect to the product diameter, and the same mold can be used even if braided yarns 6 having different heat shrinkage rates are used, which is extremely effective in terms of mold management.

The cooling device 42 is a jacket through which cooling water flows, and is disposed below the resin processing device 43 and integrally connected thereto. The surface of the hollow cylinder 25 is cooled to prevent the synthetic resin material from being overheated and gelled early due to heat conduction through the hollow cylinder 26, and at the same time, the reinforcing body is cooled to prevent its adhesion. Make it strong.

The resin processing device 43 is disposed above the cooling device 42 and is connected via a conduit 45 to an external synthetic resin material supply source (not shown). The synthetic resin material forced into the supply source enters the annular manifold 49, is extruded from the extrusion port 50, passes through the thread lattice gaps of the tubular reinforcement, enters the manifold 51, and then passes through the groove 47. and sent upward. A manifold 52 is formed at the upper end of the groove 47, and the inner and outer synthetic resin materials are once stored in these manifolds 52 and then transferred to the dies 4 above.
6 and the small diameter section 48. Warp yarn 5 and braided yarn 6
By press-fitting a synthetic resin material into the inner and outer surfaces of the tubular reinforcing body, the synthetic resin can be infiltrated into the reinforcing body very easily, and no pinholes will be formed in the product.

The wall thicknesses of the inner and outer layers of the synthetic resin hose can be appropriately set by the small diameter portion 48 forming the upper end of the hollow cylinder 25 and the die 46 facing the small diameter portion 48 . The uneven thickness of the outer layer is adjusted by appropriately moving the die 46 using the adjusting screw 54.

The second heating device 56 has an electric heater 57 that surrounds the passage of the synthetic resin hose in a cylindrical shape, and the outer periphery thereof has a heat insulating layer 58.
is insulated by. A shutoff device 59 is provided above the second heating device 56, and air is jetted inward from an annular jet port 60 of the shutoff device 59 to prevent the air heated by the second heating device 56 from escaping to the outside. While the synthetic resin hose passes through the second heating device 56, the material of the synthetic resin hose is completely heated and gelled. Cooling air blowing ports 61 and 62 are arranged above the second heating device 56, and the synthetic resin hose that has completed gelation is cooled by this cooling air. A roll 63 is disposed between these spray ports 61 and 62 to contact the outer periphery of the molded synthetic resin hose 1 and prevent its deflection. The synthetic resin hose 1 is further guided by a guide roll 64, taken up under constant tension by a take-up machine or tension machine (not shown), and wound up by a winder (not shown).

In the case of the above-mentioned manufacturing method, reinforcing materials include polyvinyl alcohol-based, polyamide-based or polyacrylonitrile-based synthetic fibers, biosynthetic fibers such as acetate-based fibers, cellulose-based recycled fibers, cotton, etc. in addition to polyester filament yarns. Natural fibers or blended fibers thereof can be used.

As the synthetic resin material, plastisol of polyvinyl chloride resin, which is liquid at room temperature, is suitable, but other than that, liquid urethane and liquid rubbers such as nitrile rubber and chloroprene rubber can be used depending on the purpose.

On the other hand, an extruder is arranged in place of the resin processing device 48 in FIG. 4, and this extruder heat-kneads synthetic resin extrusion compounds such as polyvinyl chloride, polynytylene, and polyurethane, which are usually in powder form. It may be configured to extrude as a molten liquid, in which case the second heating device becomes unnecessary. FIG. 10 shows an example of this configuration, in which powdery synthetic resin material is heated and kneaded by an extruder main body 66, and the synthetic resin is melted and passed through the first heating device 41.The inner and outer surfaces of the reinforcing body The coating is extruded and then passed through a water tank 71 to cool and solidify.

67 is a manifold, and 68 is a nozzle. 69 is a die, 70
, 70' indicate adjustment screws.

Next, specific examples of the present invention are shown in Tables 1 and 2.

A test was conducted as a reference example using three types of filament yarns A, B, and C shown in Table 1, using the following adhesive P and synthetic resin material Q, and lowering the heat treatment temperature of the reinforcing material. The results are shown in Table 2.

Compound: - Adhesive P Vinyl chloride resin 100
Part plasticizer (di-2-ethylhexyl phthalate) 9
0 parts stabilizer (organotin laurate stabilizer)
1 part synthetic resin material Q vinyl chloride resin 100
Part plasticizer (di-2-ethylhexyl phthalate) 8
0 parts Stabilizing aid (epoxidized soybean oil)
2-part stabilizer (calcium stearate)
1 part stabilizer (zinc stearate)
1 part thickener Appropriate amount (
3-15 parts) Colorant appropriate amount (0.5-3 parts)

[Brief explanation of drawings]

Fig. 1 is a perspective view of a synthetic resin hose according to the present invention, Fig. 2 is a partially exploded view of the reinforcing material of the synthetic resin hose, Fig. 3 is a schematic diagram showing the adhesion state of reinforcing threads, and Fig. 4 is a synthetic resin hose according to the present invention. Figure 5 and Figure 6 are plan views of the first warping plate and second warping plate, and Figure 7 is the trajectory of the braided bobbin at the top of the braiding machine. Fig. 8 is a perspective view showing a state in which the braided yarn is braided into the warp tubular body formed by the apparatus of the present invention, Fig. 9 is an enlarged view of the hollow cylindrical body, and Fig. 10 is a main view. It is a block diagram which shows another example of implementation of the molding machine conveniently used for this invention. DESCRIPTION OF SYMBOLS 1...Synthetic resin hose, 2...Inner layer, 3...Outer layer, 4...Reinforcing material, 5...Warp, 6...Braided thread, 11...Bobbin creel, l2
...Guide roller, 13...Tension roller, 14...
Adhesive tank, 15... Guide roller, 16, 17, 18...
Guide roller, 19... Braiding machine main body, 20... Support leg, 21
... Opening, 22 ... Yarn guide hole, 23 ... First warping plate, 24 ... Hollow bottle joint, 25 ... Hollow cylinder, 26 ... Guiding hole, 27 ... Second warping plate, 28 ... Adjustment board, 29 ... Warp Guide hole, 30...Top plate, 3
1... Bottom plate, 32... Braided thread bobbin feed gear, 33... Drive gear, 34, 34'... Endless raceway groove, 35, 35'... Braided thread bobbin, 36, 36'... Bobbin shaft, 37... Engaging portion, 38
...Drive gear, 39...Motor, 41...First heating device, 4
2... Cooling device, 43... Resin processing device, 44... Tapered part, 45... Conduit, 46... Dice, 47... Groove part, 48... Small diameter part, 49... Annular manifold, 50... Extrusion port, 51... Manifold, 52... Manifold, 54... Adjustment screw, 56
...Second heating device, 57...Electric heater, 58...Insulating material,
59... Shutoff device, 60... Annular spout, 61, 62... Spray port, 63... Roll, 64... Guide roll, 67... Manifold, 68... Nozzle, 69... Die, 70, 70'... Adjustment screw, 71... Water tank, 66... Extruder main body.

Claims (1)

[Claims] 1. A warping plate provided with thread guide holes for guiding the warp to which adhesive is attached onto the outer surface of the hollow cylindrical body, and guiding the braided thread around the outer periphery of the tubular body formed by the warp. A hollow face piece having an adjustment board for adjusting the shape, a braiding machine installed around the hollow cylinder body to form a braided body, and a reinforcing body surrounding the hollow cylinder body and bonding the contact points between the warp tubular body and the braided body. A first heating equipment for heat setting, a resin processing device having a manifold and a die for coating the inner and outer surfaces of the reinforcing body with synthetic resin, and a cooling device for air cooling the molded hose were sequentially installed. Made up of things,
An apparatus for producing a foldable synthetic resin hose with a reinforcing material embedded therein, characterized in that the hollow cylinder has a tapered part determined by the thermal contraction rate of the braided yarn at a position facing the first heating device. 2. A warping plate provided with thread guide holes for guiding the warp to which adhesive is attached at equal intervals on the outer surface of the hollow cylindrical body, and an adjustment board for guiding the braided thread to the outer periphery of the tubular body formed by the warp threads. a device for forming a warp tubular body by pulling in the longitudinal direction of a hollow cylindrical body having a molded port; a braiding machine for forming a braided body by braiding a braided thread around the outer periphery of the warp tubular body; a first heating device that surrounds the cylindrical body and heat-sets the reinforcing tubular body as a whole while bonding the contact points between the warp tubular body and the braided body; a cooling device disposed subsequent to the first heating device; An extrusion molding machine body that extrudes and coats the inner and outer surfaces of the reinforcing tubular body with molten synthetic resin material, a second heating device that gels the synthetic resin coated with the reinforcing body, and a cooling device that air cools the molded hose. The hollow cylindrical body has a tapered portion determined by the heat shrinkage rate of the braided yarn at a position opposite to the first heating device. Synthetic resin hose manufacturing equipment.