KR100425542B1 - The method and apparatus for manufacturing of High press pipe - Google Patents

Abstract

The present invention is adhered to the surface of the tube with an aqueous adhesive, and then braided with a high-strength yarn to adjust the density of the reinforcement layer broadly, and then extrude and apply a thermoplastic resin to increase the pressure reliability of the finished product and prevent hardening on the surface of the reinforcement layer. After the formation of a strong film, the present invention relates to a manufacturing apparatus and a manufacturing method of a high-pressure hose mainly made of a synthetic resin configured to fix resins of various materials on the surface.

Description

Manufacture method and manufacturing method of high pressure hose mainly made of synthetic resin

The present invention relates to a manufacturing apparatus of a high pressure resin hose mainly made of a synthetic resin used in the hydraulic hose of the hydraulic device, and a manufacturing method thereof. In detail, the method of braiding the reinforcing layer of the tube during the manufacturing process of the high pressure resin hose and the method of fixing the surface thereof are described. High pressure hose mainly for synthetic resins that increase the flexibility and pressure of hoses, improve the working environment by not using thermosetting resins and thinners, simplify the work process, improve productivity and improve the quality of products, and expand the range of use. It relates to a manufacturing apparatus and a manufacturing method thereof.

In general, the manufacturing method of the high-pressure resin hose is made of synthetic resin as a main raw material, reinforced with braiding on an extruded tube, coated with a thermosetting resin, and coated with urethane through a certain drying time. Looking at the manufacturing process as described above by the process as follows.

1st process

Raw materials received (raw materials): Nylon resin, polyester resin, polyester yarn, nylon yarn, wire thermosetting adhesive diluent, hardener

2nd process

Tube Extrusion Process

3rd process

Braiding Process

4th process

Thermosetting resin bonding The thermosetting adhesive resin is applied to a braided tube with a curing agent and a diluent, followed by drying for a certain time (at least 1 hour at room temperature).

5th process

Polyurethane Bonding Process

Urethane resin is extrusion coated on the thermosetting resin applied to the tube.

The high pressure resin hose manufactured in the above process is widely used in hydraulic actuators, aircraft, automobiles, ships, industrial automation equipment using hydraulic cylinders. However, after forming the tube in the manufacturing process, using a curable resin to close contact between the tube and the reinforcement layer or close contact with the tube and the reinforcement layer with excessive tension causes hardening of the tube or early destruction of the tube to cause many problems in use. Caused it,

In Korean Patent Publication No. 2000-46922, a non-toxic thermal stabilizer, calcium hydroxide, is added to a synthetic rubber containing a halogen-based element, a filler such as carbon black, a plasticizer, an antioxidant, and the like is used. A rubber composition for a high pressure hose manufactured by using a maleimide crosslinking system and a sulfur donor crosslinking system is disclosed.

Korean Patent Application Publication No. 98-67404 discloses a wear resistance primarily in a polyurethane resin after braiding and drying a polyester fiber after applying a thermoplastic adhesive to a tube body made by extrusion molding a nylon or elastic polyester resin, and then braiding polyester fibers. A method of manufacturing a pressure resistant hose for coating a resin and coating a flexible resin with a secondary resin to manufacture a pressure resistant triple hose is described.

Korean Patent Application Publication No. 95-13699 discloses oil-resistant, cold-resistant urethane hoses, and a method of manufacturing the bellows-type hoses in which a space tunnel formed by melting urethane applied to urethane tape and reinforcement soft core at high temperature contracts or relaxes. Described, but with weak pressure and deflection,

Published Patent Publication No. 10-98-69690 discloses a high-pressure resin hose manufactured by adhering high-strength yarn to a tube and adsorbing the braided tube using a bond instead of a resin required for adhesion to form a coating on the high-strength yarn. Although the manufacturing method of the is described,

Since the technology uses a thermosetting resin, a certain period of time has elapsed, the high-pressure hose hardens and loses its elasticity, which is inconvenient to use.

In Korean Utility Model Publication No. 94-19529, a spring coil is wound around the hose to cover the cable, but the weight is heavy, the tensile strength is weak, and the properties of the spring coil and the synthetic resin are destroyed by repeated refraction.

Japanese Patent Application No. 88-136808 describes a high pressure hose made of vulcanized rubber in which a zinc composition is mixed with zinc methacrylate and an organic peroxide, and Korean Patent Publication No. 92-9944 has a reinforcing iron core coated with a urethane through a shaft. While rotating in a spiral, a method of mutually fusion bonding with a high temperature as urethane tape is extruded and molded is described.

The conventional techniques are mainly made of thermosetting resins, and as a result of use for a long time, the hardened hose has a large radius of curvature due to a decrease in flexibility, and when the hose is severe, bending of the hose appears, shortening the life of the hose and causing the burst due to the resistance of the fluid flow. In the long term, the braided metal component is separated from the plastic tube after hardening, resulting in a heterogeneous feeling. Also, the radius of curvature increases, so that a large diameter hose loses flexibility and cannot be used in an operation mechanism. In addition, when the curable resin is applied, the density is not constant, so that internal stress is not constant, and the breakage of the vulnerable part occurs early. In addition, the diluent diluting the curable resin is a cause of gas generation, bubbles have been generated during the urethane coating has been a problem of incomplete adhesion.

In order to solve the above problems, the present invention is to braid the reinforcement layer of the tube with a high strength yarn and to manipulate the braid angle at the time of braided reinforcement to adjust the density of the reinforcement layer, to implement a wide range of desired pressure and to adhere between the tube and the reinforcement layer reinforcement layer Adhesive film is adsorbed on the reinforcing layer of the tube by applying thermoplastic resin to the reinforcing layer by extrusion method in order to prevent the separation of the tube and the tube, to reduce the circular fracture of the tube, the fatigue of the finished product and to maintain the flexibility of the product continuously. It is an object of the present invention to provide a manufacturing apparatus and a manufacturing method of a high-pressure hose mainly made of a thermoplastic resin to induce a rise in pressure of the product to improve the work efficiency by fixing the outer shell of the tube.

1 is a detailed view of a high pressure hose mainly comprising a synthetic resin of the present invention

Figure 2 is a detailed view of the high pressure hose manufacturing apparatus mainly comprising the synthetic resin of the present invention

<Code Description of Main Parts of Drawing>

Tube (1), aqueous adhesive (2), braided reinforcement layer (3), thermoplastic resin (4),

Surface coating resin (5), vacuum vent (6), heating throat (7), application massage rings (8),

Extruded synthetic resin (9), braided reinforced tube (10), surface gating tube (11),

Resin coating machine extruder (12), surface fixing coating extruder (13), reinforcing layer massage ring (14),

Bend Heater (15)

In order to achieve the above object, the present invention is adhered to the surface of the tube with an aqueous adhesive, and then braided with a high-strength yarn to adjust the density of the reinforcing layer widely, to increase the pressure reliability of the finished product and to harden the surface of the reinforcing layer The present invention relates to a manufacturing apparatus and a manufacturing method of a high pressure hose mainly composed of thermoplastic resins configured to fix resins of various materials on the surface after extrusion coating a thermoplastic resin to prevent the formation of a strong adhesive film.

The present invention is to apply a water-based adhesive resin to the tube surface when braiding the reinforcing layer, adjust the density of the reinforcing layer by the operation of the braid angle, implement the desired pressure and apply a thermoplastic resin by extrusion method to the reinforced tube to a strong adhesive film At the same time, it secures the flexibility of the finished product by fixing the outer shell, and contributes to the high quality and safety of the hydraulic and pneumatically operated mechanism.

The material of the tube used in the present invention is usually nylon, and the water-based adhesive is a compound of any one of natural rubber or synthetic rubber (polybutadiene, etc.)

The thermoplastic resin for coating uses an adhesive mainly made of TPU (Thermoplastic polyuretane elastomer),

Surface-coating resin is TPU (Thermoplastic polyuretane elastomer), hexamethylene diisosanate, transcyclohexanoic acid 1,4 diisocyanate, isoprolone diisocyanate, 2,4,4- trimethylene dicyanate, 1,3-bis (1-Isocyanato-1-methylethyl) benzene, 1,4-bis (1-isocyanoto-1-methylethyl) benzene, 1,1-bis (4-isocyanato- 1-methylethyl) benzene, 1,3-diisocyanatobenzene, 1,4-diisocyanatobenzene, 2-4-diisocyanoto-1-methylbenzene, 1,3-diisocyanato Methylbenzene, 1,5-diisocyanatonatophthalene, 1-isoisonet-2--2- (4-isocyanatophenyl) methylbenzene, 1,1`-methylenebis (4-isocyanatobenzene), Any compound selected from isocyanic acid, polymethylenepolyphenylene polyisocyanate, triphenylmethane, 4,4 ', 4' '-triisocyanate is used.

Looking briefly at the manufacturing process of the present invention,

You can see that

Hereinafter, the present invention will be described in detail with reference to the following Examples.

Example 1

1st process

Raw materials received (raw materials): Nylon resin, polyester resin, polyester yarn, nylon yarn, wire, carbon fiber thermoplastic adhesive polyurethane.

2nd process

Tube Extrusion Process

The prepared material is put in the feeder of the extrusion device to produce a tubular extrusion.

(This is an extrusion process for manufacturing a normal tube by an extrusion apparatus, and thus, details thereof will be omitted.)

3rd process (aqueous adhesive application process)

After applying the natural rubber 0.1 ~ 0.15㎜ to the surface of the tube manufactured in the second step with an aqueous adhesive agent,

The water-based adhesive applied in this process prevents the detachment of the braided reinforcement layer on the surface of the tube in the following process, and increases and stabilizes the density of the reinforcement layer. It plays a role.

4th process (braiding process)

By applying the high strength yarn braid angle Tan30 ~ 75 ° to the surface of the natural rubber-coated tube with the aqueous adhesive prepared in the third step to increase the density and stabilize the natural rubber as the water-based adhesive is in close contact with the tube 1 In turn, it acts to increase the pressure of the tube and prevent expansion.

5th process (Thermoplastic resin application process)

As described above, an adhesive mainly containing thermoplastic TPU (Thermoplastic polyuretane elastomer) TPU (Thermoplastic polyuretane elastomer) is extruded on the surface of the braided reinforcement tube as well as 0.1 to 0.15 mm and uniformly coated at a thickness of 0.1 mm while passing through the surface massage ring. do.

6th process (Surface fixation coating process)

It is connected to the fifth process is connected to the device of the fifth process is passed through the vacuum heating throat maintained at 220 ° ~ 230 ° Celsius is extruded and fixed the surface (shell) with hexamethylene diisosanate coating.

Example 2

1st process

Raw materials received (raw materials): Nylon resin, polyester resin, polyester yarn, nylon yarn, wire, carbon fiber thermoplastic adhesive polyurethane.

2nd process

Tube Extrusion Process

The prepared material is put in the feeder of the extrusion device to produce a tubular extrusion.

(This is an extrusion process for manufacturing a normal tube by an extrusion apparatus, and thus, details thereof will be omitted.)

3rd process (aqueous adhesive application process)

After applying the synthetic rubber (poly butadiene) 0.1 ~ 0.15㎜ to the surface of the tube manufactured in the second step by using an aqueous adhesive,

The water-based adhesive applied in this process prevents the detachment of the braided reinforcement layer on the surface of the tube in the following process, and increases and stabilizes the density of the reinforcement layer. It plays a role.

4th process (braiding process)

By applying the high strength yarn braid angle Tan30 ~ 75 ° to the surface of the natural rubber-coated tube with the aqueous adhesive prepared in the third step to increase the density and stabilize the natural rubber as the water-based adhesive is in close contact with the tube 1 In turn, it acts to increase the pressure of the tube and prevent expansion.

5th process (Thermoplastic resin application process)

As described above, 0.1 to 0.15 mm of adhesive containing mainly TPU (Thermoplastic polyuretane elastomer) as a thermoplastic resin is extruded on the surface of the braided reinforcement tube, and the thickness is constant to 0.1 mm while passing through the surface massage ring. Apply.

6th process (Surface fixation coating process)

It is connected to the fifth process and connected to the apparatus of the fifth process to pass through a vacuum heating throat maintaining 220 ° ~ 230 ° Celsius by extrusion bonding the surface (shell) with 1,3-diisocyanatobenzene Take care.

At this time, the working vacuum pressure is 30 ~ 40cmhg. To do this, the role of surface massage ring is important.

The water-based adhesive resin applied to the tube during the braiding process to prevent the separation of the reinforcing layer to reduce the fatigue of the product, and the high strength yarns to be bonded to the tube increases the density of the reinforcing layer to increase the expansion pressure of the tube to ultra high pressure (700) It is a high pressure hose that can be used up to ~ 2,000㎏ / ㎠).

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a detailed view of a high pressure hose mainly comprising a thermoplastic resin of the present invention, Figure 2 is a detailed view of a high pressure hose manufacturing apparatus mainly comprising a thermoplastic resin of the present invention, a tube (1), an aqueous adhesive (2), Braided reinforcement layer (3), thermoplastic resin (4), surface coating resin (5), vacuum vent (6), heating throat (7), application massage ring (8), extruded synthetic resin (9), braided reinforcement It can be seen that the tube 10, the surface coating tube 11, the resin coating cloth extruder 12, the surface fixing coating extruder 13, the reinforcing layer massage ring 14, the bend heater 15.

Looking at the structure, the high pressure hose mainly comprising the thermoplastic resin of the present invention, as shown in Figure 1, the tube 1, the water-based adhesive (2) applied to the outside of the tube 1, and the applied water-based adhesive ( Braided reinforcing layer (3) formed on the outside of the 2), the thermoplastic resin (4) applied to the outside of the braided reinforcing layer (3), the reinforcement layer is formed in several layers, the outermost of the tube coated with the thermoplastic resin (4) It is a high pressure hose mainly made of thermoplastic resin composed of the surface coating resin (5) formed on the outside,

The apparatus for manufacturing a high pressure hose mainly comprising the thermoplastic resin is coated with an aqueous adhesive agent (2) on a conventional tube (1), and then a braided reinforcement layer is formed of a high strength yarn, and then the thermoplastic resin is mainly manufactured using a manufacturing apparatus as shown in FIG. It relates to a device for manufacturing a high pressure hose, which cannot be manufactured continuously from the tube (1), because the injection speed of the tube is different for each process, it is impossible in a continuous process, and after the batch process is made, As a device to move and manufacture,

2, the extruder 12 for applying a resin to the surface of the tube 10, the braided reinforcing layer is reinforced, and the reinforcing layer massage ring 14 provided at the inlet of the resin coating extruder 12; The band heater 15 and the band heater 15 which are installed at the rear side of the resin coating extruder 12 and for melting the tube of the extruded thermoplastic resin 9 coated with the resin on the surface by vacuum heating. Is provided at the inlet of the massaging ring (8) for coating and uniformity of the extruded thermoplastic resin to a predetermined thickness, and formed in the band heater (15), the heating throat (7) to melt by applying heat And a vacuum band 6 connected to a vacuum device (not shown) to maintain the inside of the band heater 15 in a vacuum state, and installed at a rear surface of the band heater 15, wherein the heat-melt extrusion coating is performed. Sticking the nose to the surface of the old thermoplastic resin tube As a manufacturing apparatus of a high pressure hose mainly composed of a thermoplastic resin composed of a surface fixing coating extruder 13 to be coated,

In the manufacturing method, the braided reinforcing layer passes through the reinforcing layer massage ring 14 formed at the inlet of the resinous extruder 12 for injecting the tube 10 having the braided reinforcement layer to the braided reinforcing layer resin coating extruder 12. The surface of the reinforced tube 10 is kept constant so that the resin is uniformly applied to the surface of the tube 10 to which the braided layer is reinforced.

In the resin extruder 12, the resin is uniformly coated on the surface of the tube, and the extruded thermoplastic resin tube 9 is put into the band heater 15 to be heated to a certain temperature under vacuum to the band heater 15 for melting. After the injection, the surface fixed coating extruder 13 was injected to prepare a surface fixed coated tube 11.

After the braiding step of the manufacturing process is to be carried out in a continuous process apparatus and method for manufacturing.

Experimental Example

Basic property tests were conducted according to ASTM D3183, ASTM D412, ASTM D471, ASTM D572, and ASTM D573. The burst test consisted of a rubber composition and a test hose braided with appropriate high-strength knitting, fitted to the tester without twisting or pulling, and After confirming the bubble removal by injection, up to 40 sheets of hydraulic cylinders were pressurized to Pascal (Mpa) for 120 seconds while checking whether the test liquid was leaked or the hose was broken. .

In the volume expansion test, the characteristics were evaluated by the amount of test liquid rising in the burette after maintaining it for a certain time while pressurizing to 9 Mega Pascal, the maximum test pressure.

The conventional products 1 and 2 were randomly selected and compared the high quality hoses of good quality among the high pressure hoses of other companies used in the past.

Measurement Comparison Table

Tensile Strength Kg / mm ² Burst pressure Mpa Volume Expansion Cm ² / M Example 1 1.5 190 16 Example 2 1.6 200 17 Conventional Product 1 1.2 59 20 Conventional Products 2 1.3 60 21

As described above, the present invention excludes the use of a conventional thermosetting resin and gives a constant braid angle when structuring the reinforcing layer, thereby increasing the reinforcing layer and density to implement the necessary pressure and achieve stability of the product. In this way, the large-diameter resin pressure hose can also be flexible and increase in pressure, which contributes to the high quality and stability of products using hydraulic hoses such as hydraulic actuating mechanisms.

Claims (6)

In the manufacturing method of the high pressure hose mainly made of synthetic resin, when the reinforcing layer is deposited, any one compound selected from natural rubber or synthetic rubber (polybutadiene, etc.) is applied to the tube surface to prevent separation of the tube and the reinforcing layer and to prevent the braid angle. Tan30 ~ 75 ° to increase density and stabilize, primarily increasing the pressure of the tube and preventing expansion, The hexamethylene diisosaneate, transcyclooxane 1, 0.1 mm thick with TPU (Thermoplastic polyuretane elastomer) TPU (Thermoplastic polyuretane elastomer) by the extrusion method on the surface of the braided reinforcement tube as described above and through the surface massage ring at the same time. 4 diisocyanate, isoprolone diisocyanate, 2,4,4-trimethylenedicyanate, 1,3-bis (1-isocyanato-1-methylethyl) benzene, 1,4-bis (1- Isocyanato-1-methylethyl) benzene, 1,1-bis (4-isocyanoto-1-methylethyl) benzene, 1,3-diisocyanatobenzene, 1,4-diisocy Anetobenzene, 2-4-diisocyanato-1-methylbenzene, 1,3-diisocyanatomethylbenzene, 1,5-diisocyanatonatophthalene, 1-isoisoaneto-2- (4- Isocyanatophenyl) methylbenzene, 1,1`-methylenebis (4-isocyanatobenzene), isocyanic acid, polymethylenepolyphenylenepolyisocyanate, triphenylmethane, 4,4`, 4`` -Line from triisocyanate It is produced by uniformly applying any one of the synthetic resin, and at the same time through the vacuum heating throat of the band heater to maintain 220 ~ 230 ° C, the working vacuum pressure 30 ~ 40 cmhg by extruding the outer skin Method for manufacturing high pressure hose mainly made of synthetic resin. delete delete delete delete In the manufacturing apparatus of the high-pressure hose mainly made of synthetic resin, the extruder 12 for applying the resin to the surface of the tube 10, the braided reinforcement layer is reinforced, and the reinforcement layer massage ring provided at the inlet of the resin coating cloth extruder 12 ( 14) and a band heater 15 which is installed at the rear side of the resin coating extruder 12, for vacuum heating and melting the tube of the extruded thermoplastic resin 9 coated with the resin on the surface thereof, and It is installed at the inlet of the band heater 15 and the massaging ring (8) for application to uniform the extruded thermoplastic resin to a predetermined thickness, and formed in the band heater (15), heating to melt by applying heat A throat 7, a vacuum band 6 connected to a vacuum device (not shown) to maintain the inside of the band heater 15 in a vacuum, and a rear surface of the band heater 15 are provided. Hot Water Extruded Hot Water Surface to the surface of the tube fixed to the surface coating adhered coating apparatus for manufacturing a high-pressure hose for a resin mainly composed of an extruder according to claim 13 for.