KR101343792B1 - Method and apparatus for manufacturing rubber hose of car radiator - Google Patents

Abstract

Rubber hose manufacturing apparatus of the present invention after manufacturing the endothelial rubber tube with the endothelial extruder (8) to have a relatively large diameter and a relatively small thickness than the normal endothelial rubber tube diameter of the cooler rubber hose corresponding to the same standard By reducing the diameter size gradually by the cooperative action of the shell extruder 16 and the take-out machine 24, the final rubber hose A has the same inner diameter as that of the existing rubber hose of the same standard. In the manufacture of rubber hoses for vehicle coolers requiring burst resistance, etc., raw material reduction and durability are improved.

Description

Rubber hose manufacturing method and apparatus for vehicle cooler {METHOD AND APPARATUS FOR MANUFACTURING RUBBER HOSE OF CAR RADIATOR}

The present invention relates to the manufacture of a rubber hose, and more particularly, to a manufacturing method and apparatus for improving raw material reduction and durability in manufacturing a rubber hose for a vehicle cooler requiring high heat resistance, tensile strength, burst resistance, and the like. .

In general, a rubber hose for a vehicle cooler is a hose connecting a cooler (radiator) and an engine and is used as a flow passage of coolant to prevent overheating of the engine. Since the coolant flowing through the rubber hose contains chemical additives, rust inhibitors and antifreezes, the rubber hose provided as a flow path for the coolant is required to withstand long-term use, and at the same time, high temperatures in the engine room and poor temperature change environment. It requires high heat resistance and tensile strength to withstand (thermal explosion, etc.).

The cause of failure of the rubber hose for the vehicle cooler is due to internal and external factors due to deterioration, and internal factors include stress due to contact with oil, fuel, coolant and refrigerant, which are used media, and external factors include heat, oxygen, Air such as ozone, ultraviolet rays and moisture.

Due to these internal and external factors, the gradual cracking in the hose may cause leakage of coolant or rupture of the hose under normal pressure. Therefore, the rubber hose for vehicle cooler is reinforced with braided rubber tube and reinforcement yarn. By forming and manufacturing a rubber hose for a vehicle cooler with a triple structure of a layer and a rubber jacket layer or more, and improving durability of heat resistance, pressure resistance, tension, and the like. -0683819 "Moulding Manufacturing Method and Apparatus for Silicone Hose for Automobile".

However, in the production of such a three-layered rubber hose of the prior art, the thickness of the endothelial rubber tube which is extruded in the form of a tube through an extruder is usually manufactured to at least 3 mm or more, which is used for endothelial through the braiding process of the subsequent process. When the reinforcing yarn is wound on the outer surface of the rubber tube, the inner diameter of the rubber tube is maintained almost unchanged. However, when the thickness of the endothelial rubber tube is 3 mm or more, the resistance received when exiting through the extruder is gradually increased. It does not work, it takes a long time, and the rubber raw materials are unnecessary, which increases the cost of the product.

In addition, after braiding the reinforcement yarn on the outer surface of the rubber tube for endothelial bonding, the rubber solution is bonded to the reinforcement yarn in the next step to coat the outer rubber. Rubber for vehicle cooler of triple structure by molding so that rubber is introduced into the reinforcement thread as the rubber enters into the gap between the front side and passes through the inner through passage of the outer shell mold I'm getting a hose.

However, this conventional technology is because the outer skin rubber tube passes through the molding hole of the outer skin forming mold formed somewhat larger in diameter than the inner rubber tube wrapped with the reinforcement yarn, and at the same time the slime skin rubber supplied from the forming mold is simply coated and formed. Since the thickness of the outer rubber layer discharged from the mold is not evenly formed and the adhesive strength between the rubber tube and the outer rubber layer through the inner skin reinforcing yarn is weak, cohesive force drops, and cracks occur during the subsequent contraction and expansion of the rubber hose. It can also be a factor. In addition, since the outer rubber is simply thickly coated on the reinforcement layer made of reinforcing yarns, the outer diameter of the rubber hose is unnecessarily increased and the weight is naturally weighted, thus making it difficult to install it to the car cooler. There is a drawback of increased consumption of raw materials.

Therefore, an object of the present invention is to obtain a volume and weight reduction, raw material savings in the manufacture of a rubber hose for a vehicle cooler of a multi-structure, such as triple, and at the same time high heat resistance required by the rubber hose for a vehicle cooler by strengthening the adhesive force between the inner and outer skins, The present invention provides a rubber hose manufacturing apparatus and a manufacturing method for a vehicle cooler capable of producing a product having excellent tensile strength and burst resistance.

According to the above object, the present invention, in the method of manufacturing a rubber hose for a vehicle cooler having a three-layer structure of the reinforcement layer and the outer rubber sheath layer of the endothelial rubber tube, reinforcement yarns, using the endothelial extruder Extruding the endothelial rubber tube so as to have a diameter and a thickness that are relatively larger than a normal endothelial rubber tube diameter of the rubber hose for a vehicle cooler, and braiding the reinforcement yarn on the molded endothelial rubber tube; To coat the inner rubber tube coated with the reinforcement yarn through an extruder for the outer skin, the outer rubber coating layer is formed by extrusion molding, but the inner rubber tube is drawn using the pull force acting on the discharge side of the outer rubber extruder than the outer diameter of the endothelial rubber tube. Reinforce the outer skin rubber slime injected into the outer mold while narrowly passing through the outer mold of the outer mold Hayeoseo the coated molding to a coated endothelial rubber tube to form a shell made of an rubber layer, characterized by the step of completing the rubber hose.

The present invention also provides an apparatus for manufacturing a rubber hose for a vehicle cooler having a triple structure of a reinforcement layer made of an inner skin rubber tube, a reinforcing yarn and a layer of an outer rubber coating layer, wherein the rubber hose for a vehicle cooler corresponding to the same standard. In order to extrude the endothelial rubber tube having a diameter relatively larger than the endothelial rubber tube diameter, the endothelial forming hole of the endothelial mold is formed relatively larger than the outer diameter of the conventional endothelial rubber tube and Endothelial extruder having an endothelial extrusion pin having a diameter relatively larger than the conventional endothelial extrusion pin to less than the thickness, and a braid to form a reinforcement layer by braiding the outer surface of the endothelial gomu tube discharged from the endothelial extruder with a reinforcing yarn Pass the outer diameter of the outer mold of the outer mold by passing the diameter of the outer mold through the through-hole of the outer extrusion pin. An outer shell extruder for forming the outer rubber coating layer by compression coating on the inner rubber tube coated with the reinforcement yarn by extruding the outer rubber mucus injected into the outer mold by forming the outer diameter of the inner rubber tube having the reinforcing material layer formed therein, and Conveyor type that draws the rubber hose discharged from the shell extruder, located at the rear of the shell extruder, and draws down the rubber tube for endothelial rubber tube having a larger diameter than the shell molding hole to reduce the size so that it can exit the shell molding hole. Characterized in that it consists of a take-out.

The present invention is an extrusion manufacturing considering the physical properties of the rubber material as the main material when manufacturing a rubber hose for a vehicle cooler having a multi-structure, such as a triple structure through an extruder, while reducing the volume and weight, while stabilizing the inner and outer diameter dimensions of the rubber hose, It has the effect of reducing the raw materials, and also has the advantage of producing a product that is excellent in high heat resistance, tensile strength, rupture resistance, etc. required as a rubber hose for the cooler by strengthening the adhesive strength of the extruded sheath rubber.

1 is a schematic configuration diagram of a rubber hose manufacturing apparatus for a vehicle cooler according to an embodiment of the present invention;
Figure 2 is a working state configuration diagram in the endothelial extruder of Figure 1,
3 is a configuration diagram of the working state in the knitting machine of FIG.
Figure 4 is a configuration of the working state in the shell extruder of Figure 1,
FIG. 5 is an enlarged view illustrating main parts of a molding hole and an outer shell extrusion pin of the outer mold forming the outer shell extruder of FIG. 4;
Figure 6 is a partial cutaway perspective view of the rubber hose for a vehicle cooler according to an embodiment of the present invention,
Figure 7 is a configuration diagram comparing the working step of the rubber hose of the present invention with the existing rubber hose of the same standard.

As used herein, the term "rubber hose" may include a rubber material alone or other materials in the rubber material, and may include an equivalent material such as a silicon material having properties and performance similar to those of the rubber material. It is a concept.

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

1 is a schematic configuration diagram of an apparatus for manufacturing a rubber hose for a vehicle cooler according to an exemplary embodiment of the present invention, which includes an endothelial extruder 8, a braider 15, an outer shell extruder 16, and a take-out machine 24. A rubber hose A for a vehicle cooler as shown in FIG. 7 is manufactured.

The endothelial extruder 8 forms the endothelial rubber tube 2 of FIG. 7, and the braider 15 braids the outer surface of the endothelial rubber tube 2 discharged from the endothelial extruder 8 with a reinforcing thread 4a. To form the reinforcing material layer 4, and the skin extruder 16 is a means for coating and forming the skin rubber coating layer 6 by extruding an inner skin rubber tube 2 coated with the reinforcing yarn 4a. The drawer 24, in conjunction with the envelope extruder 16 as a conveyor type drawer, performs a drawing operation consistent with the object of the present invention.

Rubber hose manufacturing apparatus of the present invention after the manufacture of the endothelial rubber tube to have a relatively large diameter and relatively small thickness than the normal endothelial rubber tube diameter of the cooler rubber hose corresponding to the same standard and the extruder 16 and The size of the diameter is gradually reduced by the cooperative action of the intake machine 24 so that the final rubber hose has the same inner diameter as that of the existing rubber hose of the same standard.

In the configuration of the rubber hose manufacturing apparatus of the present invention, the braiding machine 15 is conventional, and the endothelial extruder 8 and the skin extruder 16, and the take-out machine 24 are provided with the structural features according to the present invention. 2 to 7 together with FIG. 1 will be described in more detail the configuration and operation, including the features performed in the manufacture of the rubber hose of the present invention.

First, reference is made to FIG. 7.

FIG. 7 is a diagram illustrating a step-by-step comparison between a conventional method and a rubber hose manufacturing process of the present invention, wherein (a) is a procedure part related to the existing method and (b) is a procedure part related to the present invention. In step (a) and (b) of FIG. 7, step (1) is a step in which the endothelial rubber tube (102) (2) is molded, and step (2) is coated with a reinforcement yarn (4a) on the endothelial rubber tube (102) (2). To form the reinforcing material layer 4, and step (3) is a step in which the outer skin coating layer (106) (6) is extruded on the endothelial rubber tube (102) (2) wrapped with the reinforcing yarn (4a). .

FIG. 2 is a configuration diagram of the working state in the endothelial extruder 8 of FIG. 1, wherein the endothelial mold 10 has a tapered endothelial molding hole for injecting the endothelial rubber slime 14, and endothelial extrusion at the front end thereof. The pin 12 is configured to be positioned. The endothelial rubber slime 14 is forcedly injected into the gap between the endothelial molding hole of the endothelial mold 10 and the endothelial extruding pin 12 so that the endothelial rubber tube 2 is extruded through the endothelial extruder 8.

In the present invention, in configuring the endothelial mold 10 of the endothelial extruder 8, the diameter (x) of the endothelial molding hole is configured to be formed relatively larger than the diameter of the conventional conventional endothelial rubber tube (102 in FIG. 7). do. At the same time, the endothelial extruded pin 12 is relatively thinner than the conventional endothelial extruded pin such that the thickness t1 of the endothelial rubber tube 2 of the present invention is less than the thickness t0 of the conventional endothelial rubber tube 102. Has a large diameter.

Therefore, the endothelial rubber tube 2 discharged through the endothelial extruder 8 of the present invention has a relatively larger diameter (D10) than the conventional endothelial rubber tube 102 of the rubber hose for vehicle cooler corresponding to the same standard. At the same time has a relatively small thickness (t1). As can be seen in step (a) (b) of Figure 7, the inner diameter (D10) of the endothelial rubber tube (2) of the present invention than the inner diameter of the conventional endothelial rubber tube 102 of the same standard (d00) It is larger and the thickness t1 of the endothelial rubber tube 2 of the present invention is thinner than the thickness t0 of the endothelial rubber tube 102 of the same standard.

As an example, in the conventional method, the inner diameter d00 of the endothelial rubber tube 102 is 34.1 mm, the outer diameter thereof is 38.6 mm, and the thickness t0 is 2.25 mm. The inner diameter D10 was 37 mm, the outer diameter was 41 mm, and the thickness t0 was 2 mm.

After obtaining the endothelial rubber tube 2 as described above in the endothelial extruder 8 of FIGS. 1 and 2, the endothelial rubber tube (b) is braided by the reinforcing yarn 4a in the braiding machine 15 of FIG. 2) The reinforcing material layer 4 is formed on the outer surface. While braiding with reinforcement yarns 4a, the diameter of the endothelial rubber tube 2 is slightly reduced. As an example, in the conventional method, the inner diameter d01 of the endothelial rubber tube 102 is 33 mm and its outer diameter is 37.6 mm. The thickness t0 is not reduced to about 2.25 mm, the inner diameter D11 of the endothelial rubber tube 2 of the present invention is 36 mm, and the outer diameter thereof is slightly reduced to 40 mm, and the thickness t0 is almost the same as 2 mm.

After that, the endothelial rubber tube 2 coated with the reinforcing yarn 4a is introduced into the outer shell extruder 16 as shown in FIGS. 1 and 4. 5 shows the main components of the shell extruder 16.

The outer shell forming mold 18 of the outer shell extruder 16 forms an outer shell forming hole 18a, and its diameter φ is wrapped with a reinforcing yarn 4a which is introduced into the outer shell extruder 16 ( It forms less than the outer diameter D2 of 2).

In addition, in the present invention, the extension length l of the outer shell forming hole 18a of the outer shell mold 18 is formed to be 2 to 2.5 mm. If it is less than 2 mm, the adhesive force of the outer skin rubber slime 22 is lowered, and if it exceeds 2.5 mm, the reinforcement yarn 4a wrapped in the inner skin rubber tube 2 has a strong contact resistance when passing through the outer skin forming hole 18a. The numerical range of 2 to 2.5 mm has a critical significance because the defect exposed to the outer rubber covering layer 6 may be pushed back.

The endothelial rubber tube 2 wrapped with the reinforcing yarn 4a introduced into the outer shell extruder 16 passes through the outer shell extrusion pin 20 positioned adjacent to the outer shell forming hole 18a of the outer shell molding frame 18. After passing through 21 to the outer shell forming hole (18a) of the outer shell forming mold 18, the outer shell forming hole (18a) to the reinforcement yarn (4a) is introduced into the outer shell extruder (16) Since the endothelial rubber tube 2 is formed smaller than the diameter of the wrapped endothelial rubber tube 2, the injected endothelial rubber tube 2 does not pass through the outer shell forming hole 18a.

In the present invention, the endothelial rubber tube 2 wrapped with the reinforcement yarn 4a passes through the relatively narrow outer shell forming hole 18a and the outer rubber coating layer 6 can be coated on the outer surface thereof. At the rear of the extruder 16, a conveyor type take-out 24 is provided which draws the rubber hose A so that the diameter of the endothelial rubber tube 2 can be reduced.

More specifically, in the present invention, the diameter of the endothelial rubber tube 2 is reduced by adjusting the pulling force of the take-up machine 24. At this time, the diameter (D12) of the endothelial rubber tube (2) reduced by the take-out machine 24, that is, the inner diameter (D12) of the rubber hose (A) completed according to the present invention is a conventional rubber finished to the same standard The pulling force of the take-up machine 24 is adjusted to be equal to the inner diameter d02 of the hose.

In the present invention, the take-up machine 24 is a conveyor-type take-up with a gap-adjustable left and right conveyor pair in the center, and can control the take-up machine 24 to obtain a desired pulling force by adjusting the speed of the conveyor. .

In the present invention, the outer shell rubber tube (2) coated with the reinforcing yarn (4a) through the outer shell extruder 16 to coat the outer rubber coating layer (6) by extrusion molding, the outer shell rubber tube (2) An outer shell molding hole having a diameter φ narrower than the outer diameter D2 of the endothelial rubber tube 2 wrapped with the reinforcement yarn 4 using the pulling force acting on the take-out force 24 acting on the discharge side of the extruder 16 ( The outer rubber coating layer 6 is coated by molding the outer rubber slime 22 injected into the outer shell extruder 16 on the outer surface of the inner rubber tube 2 wrapped with the reinforcing thread 4 while being reduced to 18a). To form a rubber hose (A).

In forming the outer skin rubber coating layer 6 in the present invention, while passing through the outer skin forming hole (18a) having a relatively narrow and the extension length (l) of 2 to 2.5mm and the outer rubber mucus 22 is pressed strongly Since it is coated, the adhesion of the outer rubber to the outer surface of the rubber tube 2 and the reinforcing yarn 4a on the outer surface is increased.

As an example, in the conventional method, the inner diameter d02 of the endothelial rubber tube 102 constituting the rubber hose is 33.5 mm, and the outer diameter of the finished rubber hose is 38.5 mm, the rubber hose A completed according to the present invention. The inner diameter D11 of the endothelial rubber tube 2 constituting the same is 33.5 mm equal to the inner diameter d02 of a conventional rubber hose of the same standard, and the outer diameter D3 is 37.5 mm, and the rubber hose mentioned in the prior art. It is 1mm smaller than the outer diameter (38.5mm) in (A).

In the present invention, the inner diameter (D11) of the rubber hose (A) is much smaller than the initial size, the same dimension as the existing product is the endothelial rubber tube (2) has been increased to the draw using the rubber properties, rubber hose (A The outer diameter (D3) of) is reduced because the thickness t1 of the endothelial rubber tube 2 is smaller than that of the conventional method. Accordingly, there is an advantage that can reduce the production cost by reducing the volume and weight as well as raw materials compared to the conventional method. At the same time, the robustness of the triple structure is further improved.

In the above description of the present invention, the rubber hose for a vehicle cooler has been described as a specific embodiment, but may be used in other places requiring similar characteristics to the rubber hose for a vehicle cooler, and thus various modifications may be made without departing from the scope of the present invention. can do. Therefore, the scope of the present invention should not be limited by the described embodiments but should be determined by the equivalents of the claims and the claims.

The present invention can be used to manufacture various rubber hoses.

(2)-endothelial rubber tube (4)-reinforcement layer
(4a)-Reinforcement yarn (6)-Sheath rubber sheath
(8)-Endothelial Extruder (10)-Endothelial Mold
(12)-Endothelial Extrusion Pins (14)-Endothelial Rubber Mucus
(16)-Jacketed Extruder (18)-Jacketed Mold
(18a)-Shell Molding Hole (20)-Shell Extrusion Pin
(21)-Through passage (22)-Outer rubber slime
(24)-Dispenser

Claims (5)

In the method of manufacturing a rubber hose for a vehicle cooler having a three-layer structure of a reinforcement layer made of an endothelial rubber tube, a reinforcement yarn and an outer layer of a rubber coating,
Extruding the endothelial rubber tube using an endothelial extruder to have a diameter and a thickness that are relatively larger than the normal endothelial rubber tube diameter of the rubber hose for a vehicle cooler of the same standard;
Braiding the reinforcement yarn on the molded endothelial rubber tube,
The reinforcement yarn is coated with an outer shell rubber tube coated with an outer shell extruder to form an outer rubber coating layer by extrusion molding, but the outer rubber tube is narrower than the outer diameter of the endothelial rubber tube by using a pull force acting on the discharge side of the shell extruder. The rubber mucus injected into the outer shell molding mold is reduced by passing through the outer shell molding hole of the outer shell molding mold having a diameter to coat the inner rubber tube coated with the reinforcement yarn to form the outer rubber layer to complete the rubber hose. Rubber hose manufacturing method for a vehicle cooler.
The method of claim 1, wherein the drawing force is applied so that the inner diameter of the finished rubber hose is the same as the inner diameter of a conventional rubber hose completed to the same standard.
The method of claim 1 or 2, wherein the length of the shell molding hole is 2 to 2.5 mm.
In the apparatus for manufacturing a rubber hose for a vehicle cooler having a triple structure of a reinforcement layer made of an endothelial rubber tube, a reinforcement yarn and an outer layer of a rubber coating,
In order to extrude an endothelial rubber tube having a diameter that is relatively larger than the normal endothelial rubber tube diameter of a rubber hose for a vehicle cooler of the same standard, the endothelial forming hole of the endothelial mold is made larger than the outer diameter of the normal endothelial rubber tube. An endothelial extruder having a relatively large diameter and an endothelial extrusion pin having a diameter larger than that of a conventional endothelial extrusion pin so as to be less than the thickness of the conventional endothelial rubber tube,
A braider for braiding the outer surface of the endothelial gou tube discharged from the endothelial extruder with a reinforcing yarn to form a reinforcing material layer,
The diameter of the shell molding hole of the shell mold is less than the outer diameter of the endothelial rubber tube formed with a reinforcement layer through which the shell molding hole of the shell mold passes through the through-hole of the shell extrusion pin. An outer shell extruder for extruding outer shell mucus to form an outer shell coating layer by compression coating on an inner shell rubber tube coated with a reinforcement yarn;
At the rear of the shell extruder, the rubber hose discharged from the shell extruder is taken out, but the rubber tube for endothelial having a larger outer diameter than the molding hole of the shell molding die is applied to reduce the size so that it can exit the shell molding hole. Rubber hose manufacturing apparatus for a vehicle cooler, characterized in that consisting of a conveyor type take-off.
The apparatus of claim 4, wherein the conveyor type taker is configured to control the drawing force by adjusting the speed of the conveyor as a gap-adjustable left and right conveyor pair.

Images