KR100361974B1 - PVC Pressure-resistant Hose and the Method - Google Patents

Abstract

The present invention relates to a pressure-resistant hose, while using a low-cost PVC material as a main material, so that the contact surface of each layer is tightly coupled to maintain the pressure resistance sufficiently, and is coupled between the PVC tube layers The purpose of the present invention is to provide a pressure resistant hose using PVC and a method of fabricating the braided layer by using pre-shrinkage and PVC coated filament yarn to maintain a constant thickness and inner diameter of the manufactured hose. .

The present invention, the first tube forming step of molding the first PVC tube layer 50; Braided layer forming step of coating the braided layer 60 by weaving the PVC coated filament yarn on the outer surface of the first PVC tube layer 50; Heating the braided layer 60 to a high temperature to melt the coated PVC so that the coated PVC is solidified so as to be integrally combined with the outer surface of the first PVC tube layer 50; In the molten state of the coated PVC on the braided layer 60, by forming a second PVC tube layer 70 on the outer surface of the braided layer 60, as the coated PVC solidifies the second PVC tube layer 70, a second tube layer forming step to be integrally coupled with the inner surface; Characterized in that it comprises a.

Description

PVC pressure-resistant hose and the method using fabricated seed

The present invention relates to a pressure-resistant hose, and more particularly, using a low-cost PVC material as a main material, so that the contact surface of each layer is tightly coupled to maintain the pressure resistance sufficiently, constitute a braided layer Pre-shrink the filament yarn to prevent the non-uniform thermal shrinkage of the braided layer, to maintain a uniform pressure and the inner diameter of the hose to have a stable pressure resistance and a hose for pressure resistance using PVC and its manufacturing method will be.

Typically, the pressure resistant hose is used to transfer a high pressure liquid or gas to a predetermined place, and is manufactured as a PVC or rubber material having excellent moldability.

1 illustrates an example of a pressure resistant hose according to the related art, and includes a braided layer 20 woven from filament yarn between a plurality of rubber tube layers 10 and 30.

This conventional pressure-resistant rubber hose, as shown in Figure 2, first, to form a hose-shaped first rubber tube layer 10, and then braided by braiding the latex-coated filament yarn coated on the outer surface ( 20), and then, in a state in which the second rubber tube layer 30 is bonded to the outer surface of the braided layer, a steaming process of heating with steam is performed, and the first rubber tube layer 10 and the braided layer ( 20) and the rubber hose for pressure resistance of the multilayer structure in which the second rubber tube layer 30 is sequentially combined is completed.

On the other hand, the conventional pressure-resistant PVC hose is a pressure-resistant hose made of PVC as a main material, the production method will be described below with reference to FIG.

First, by extrusion molding the PVC into a tube shape to form a first PVC tube, applying an adhesive on the outer surface, and then steaming for 30 to 120 minutes at 90 to 130 ℃ in a state of applying a braided layer consisting of a spun yarn The adhesive applied is dried through. Subsequently, while the adhesive is applied to the outer surface of the braided layer, a heating step is performed to dry the adhesive applied on the braided layer by heating to 100 to 180 ° C. Then, the step of covering the braided layer outer surface with the second PVC tube is performed, thereby completing the pressure resistant PVC hose.

In addition, the pressure-resistant PVC hose manufacturing process, as shown in Figure 5, omitting the steaming step, in the heating step may be configured to simultaneously dry the adhesive applied to the inner and outer sides of the braided layer.

However, the conventional pressure-resistant rubber hose, due to the use of a rubber material which is expensive and weak in durability, the volume of the manufactured hose is increased, the production cost of the pressure-resistant hose is greatly increased, the storage of the manufactured hose In addition, there is a problem such as difficult to transfer, and also, in the production of the pressure-resistant rubber hose, the braided layer is uneven because the deviation of the heat transferred from each part of the filament yarn constituting the braided layer in the steaming step becomes large. As a result, as shown in FIG. 3, the manufactured hose has a non-uniform thickness, so that its inner diameter is uneven, and the manufactured hose does not have a stable pressure resistance.

In addition, conventional pressure-resistant PVC hose has the advantage of low production cost and excellent durability, but because the braided layer is formed by twisting the spun yarn of several strands, not only the volume of the manufactured hose is very large, the cross section This non-uniformity causes a problem that the pressure resistance of the hose is non-uniform, and in particular, by bonding only the both surfaces of the braided layer in a coated state, the bonding strength between the layers is weakened, and thus the pressure resistance is not stably maintained, and PVC is used. When the hose is impacted, such as bending, there are problems that it is difficult to maintain a uniform pressure resistance as a result of layer separation phenomenon as the spun yarns constituting the braided layer are spaced apart from each other.

Therefore, the present invention has been made to solve the conventional problems as described above, while combining the braided layer with a PVC coated filament yarn between a plurality of PVC tube layers, the PVC coated on the braided layer through the heating process By melt-combining with the PVC tube layers on both sides while being melted, by using a low-cost PVC material, the contact surface of each layer is in close contact with each other to maintain a uniform and stable pressure resistance in the longitudinal direction It is a main object to provide a pressure resistant hose and a method of manufacturing the same.

Another object of the present invention, in the configuration of the pressure-resistant hose according to the present invention, by constructing the braid layer using the filament yarn pre-shrinked by the preceding heating, thereby to closely bond the braid layer to the PVC tube layer In the heating process, to prevent excessive heat shrinkage of the braided layer, and to provide a pressure-resistant hose using PVC and its manufacturing method to maintain a stable pressure resistance by maintaining a uniform thickness and the inner diameter of the hose produced accordingly .

1 is a perspective view showing an example of a typical pressure resistant hose,

Figure 2 is a flow chart showing an example of a conventional pressure-resistant rubber hose manufacturing method,

3 is a partial cross-sectional view showing an example of a conventional pressure-resistant rubber hose,

Figure 4 is a flow chart showing an example of a conventional pressure-resistant PVC hose manufacturing method,

Figure 5 is a flow chart showing another example of a conventional pressure-resistant PVC hose manufacturing method,

6 is a flow chart showing a pressure-resistant hose manufacturing method using a PVC according to the present invention,

Figure 7 is a partial cross-sectional view showing a pressure hose using a PVC according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10: first rubber tube layer, 20: braided layer (conventional), 30: second rubber tube layer, 50: first PVC tube layer, 60: braided layer (present invention), 70: second PVC tube layer.

In order to achieve the above object, the present invention, the first PVC tube layer formed into a tube shape; A braided layer made of a PVC coated filament yarn, the coated PVC being integrally bonded to the outer surface of the first PVC tube layer by heating heat; A second PVC tube layer covered with the braided layer and integrally bonded to the braided layer in a state in which the PVC coated on the braided layer is melted by the heating heat; It characterized by having a.

The present invention is also characterized in that the coated filament yarn constituting the braided layer is preshrunk by the preceding heating.

In another aspect, the present invention, the first tube forming step of molding the first PVC tube layer using PVC; A braided layer forming step of coating a braided layer by weaving a PVC coated filament yarn on an outer surface of the first PVC tube layer formed through the first tube forming step; After the braided layer forming step, the braided layer coated on the outer surface of the first PVC tube layer is heated to a high temperature to melt the coated PVC, thereby solidifying the coated PVC with the outer surface of the first PVC tube layer. Heating step to be coupled to; It is executed during the heating step, and in the molten state of the PVC coated on the braided layer through the heating step, by forming a second PVC tube layer on the outer surface of the braided layer, as the coated PVC solidifies A second tube layer forming step of integrally coupling with the inner surface of the second PVC tube layer; Characterized in that it comprises a.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the pressure-resistant hose using PVC and its manufacturing method according to the present invention will be described in detail.

Figure 6 is a flow chart showing an embodiment of a pressure resistant hose manufacturing method using a PVC according to the present invention, Figure 7 shows a side view of a pressure resistant hose manufactured according to the present invention, as shown, in the present invention The pressure-resistant hose according to this embodiment includes the first PVC tube layer 50, the braided layer 60, and the second PVC tube layer 70.

The said 1st PVC tube layer 50 is a part which forms the inner part of the pressure-resistant hose which concerns on this invention, and is produced by extrusion-molding PVC in tube shape.

The braided layer 60 is a woven fabric of pre-shrunk and PVC coated filament yarn, is coated on the outer surface of the first PVC tube layer 50, the braided layer 60 is the first PVC tube layer 50 ), The PVC coated on the filament yarn is heated to a melting point at a high temperature, so that during the solidification of the coated PVC according to the subsequent cooling, the outer surface of the first PVC tube layer 50 and the braided layer 60 The inner surface is configured to be integrally coupled.

The second PVC tube layer 70 is a PVC member which is covered on the outer surface of the braided layer 60, and the braided layer is applied to the braided layer 60 while the heating heat is applied to melt the PVC coated on the braided layer 60. (60) By being coated on the outer surface, when the solidification of the PVC coating portion melted by the heating heat, the outer surface of the braided layer 60 and the inner surface of the second PVC tube layer 70 is configured to be integrally coupled.

On the other hand, the pre-shrinkage of the filament yarn constituting the braided layer 60, in order to prevent the filament yarn is partially excessive shrinkage during the heating process, that is, the thickness and inner diameter of the hose produced due to uneven shrinkage It means heat-shrinked in advance, and means that it is heated to pre-shrink about 70 to 90% of the original shrinkage of the filament yarn. At this time, the remaining heat shrinkage of 10 to 30% of the original shrinkage of the filament yarn, the residual shrinkage during the heating process of the braided layer 60 is coupled between the first and second PVC tube layer 50, 70 The braided layer 60 coupled between the first and second PVC tube layers 50 and 70 is pulled tightly so that the braided layer 60 is connected to the bonding surface. It can be tightly coupled without generating voids.

In addition, the coated filament yarn constituting the braided layer 60 is coated with PVC between each of the plurality of filament strands and the outside thereof, that is, a plurality of filament strands are impregnated inside the PVC coating pillar This means that the coating process of the filament yarn proceeds almost simultaneously with the preshrinkage for heating the filament yarn.

Method of manufacturing a pressure resistant hose using a PVC having the above configuration, as shown in Figure 6, the first tube forming step (S10), braided layer forming step (S20), heating step (S30) and the second It comprises a tube layer forming step (S40).

First, a first tube forming step S10 of extruding a tubular first PVC tube layer 50 using PVC is performed.

In the braided layer forming step (S20) performed after the first tube forming step (S10), the braided layer forming step (S20) of weaving a PVC-coated filament yarn and coating the outer surface of the first PVC tube layer 50 is Is executed. At this time, the filament yarn constituting the braided layer 60, by using a pre-shrinkage of about 70 to 90% by the preceding heating, the filament yarn is partially excessive by heat in the subsequent heating step (S30) It is configured to prevent shrinkage.

The heating step (S30) is performed after the braided layer forming step (S20), up to a temperature (150 ~ 260 ° C) in which the PVC coated on the filament yarn constituting the braided layer 60 is melted in a gel state By heating, the PVC coating of the braided layer 60 coated on the outer surface of the first PVC tube layer 50 to be melted.

In the heating step (S30), the filament yarn constituting the braided layer 60 is to some extent shrinkage, but the filament yarn pre-shrink 70 to 90% by the preceding heating, 10 ~ 10 of the original shrinkage Only 30% shrink. Such a small shrinkage rate prevents the braided layer 60 from being partially contracted excessively, thereby preventing the thickness and inner diameter of the hose from being made uneven, as well as pulling the braided layer 60 tightly to form the first PVC tube. By eliminating the voids between the layer 50 and the braided layer 60, the tight coupling between the first PVC tube layer 50 and the braided layer 60 is more firm.

In the second tube layer forming step (S40) performed during the heating step (S30), in the state in which the PVC coating of the braided layer 60 is melted in a gel state through the heating step (S30), A process of molding the second PVC tube layer 70 on the outer surface of the braided layer 60 is performed.

After the execution of the second tube layer forming step (S40) as described above, forming the three layers (50 to 70) to cool the combined pressure hose, the first, second PVC tube layer (50) (70) The PVC coating of the braided layer 60 bonded therebetween, while solidifying again, is integrally bonded with the contact surfaces of the first and second PVC tube layers 50 and 70, and as shown in FIG. 7. , The first PVC tube layer 50, the braided layer 60 and the second PVC tube layer 70 has a uniform thickness and uniform inner diameter and closely coupled to each other, thereby maintaining the pressure resistance stably the multi-layer structure The pressure hose of the will be completed.

As can be seen by the above embodiments, according to the pressure-resistant hose using the PVC and the manufacturing method according to the present invention, by using a low-cost and durable PVC material, the contact surfaces between the layers are in close contact with each other The pressure resistant hose can be manufactured to be tightly coupled and the pressure resistance can be stably maintained. As the pressure resistant hose can be manufactured in a small size, the production cost can be reduced and the pressure resistant hose can be manufactured. There is an effect that can facilitate storage and transport.

In addition, in the construction of the pressure-resistant hose according to the present invention, by constructing the braided layer using the pre-shrink filament yarn by the preceding heating, in the heating process of closely bonding the braided layer to the PVC tube layers on both sides By partially preventing excessive heat shrinkage, the thickness of the manufactured hose and its inner diameter can be maintained uniformly, and thus, the pressure resistance of the hose can be stably maintained.

Although the pressure-resistant hose using PVC and the manufacturing method thereof according to the embodiments of the present invention have been described above, the present invention is not limited thereto, and the same heating method is applied to the outer surface of the pressure-resistant hose composed of the three layers. By using a combination of the other braided layer and the third PVC tube layer in turn to produce a pressure-resistant PVC hose in which the five layers are tightly coupled to each other, such modifications and applications will be possible to those skilled in the art.

Claims (4)

(Correction) A conventional hose having a first tube layer, a braided layer bonded to an outer surface thereof, and a second tube layer coated on the outermost side again; The first tube layer is composed of a first PVC tube layer molded into a tube shape; The braided layer is made of PVC coated filament yarn, in which the coated PVC is integrally bonded to the outer surface of the first PVC tube layer by heating heat; The second tube layer, in the molten PVC coated on the braided layer by the heating heat, covered with the outer surface of the braided layer, the second PVC tube layer is integrally coupled with the braided layer; Pressure hose using PVC. The method of claim 1, The pressure-resistant hose using PVC, characterized in that the coated filament yarn constituting the braided layer is pre-shrunk by the preceding heating. A first tube forming step of forming a first PVC tube layer using PVC; A braided layer forming step of coating a braided layer by weaving a PVC coated filament yarn on an outer surface of the first PVC tube layer formed through the first tube forming step; After the braided layer forming step, the braided layer coated on the outer surface of the first PVC tube layer is heated to a high temperature to melt the coated PVC, thereby solidifying the coated PVC with the outer surface of the first PVC tube layer. Heating step to be coupled to; It is executed during the heating step, and in the molten state of the PVC coated on the braided layer through the heating step, by forming a second PVC tube layer on the outer surface of the braided layer, as the coated PVC solidifies A second tube layer forming step of integrally coupling with the inner surface of the second PVC tube layer; Hose manufacturing method for pressure resistance using PVC, comprising a. The method of claim 3, wherein In the braided layer forming step, the filament yarn constituting the braided layer, the pressure-resistant hose manufacturing method using PVC, characterized in that the pre-shrinkage by the preceding heating.