JP5677009B2 - Hose manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a hose.

  As shown in FIGS. 5 to 7, some drainage hoses are made of synthetic resin and have flexibility. The pipe wall portions of these drainage hoses are composed of a main body 11 and a single reinforcing wire 12 spirally provided on the main body 11, and the reinforcing wire 12 extends over the entire length of the hose, depending on the application, etc. It is arrange | positioned in the inside of the main body 11, an outer peripheral surface, or an internal peripheral surface (for example, refer patent documents 1-3).

Japanese Patent Laid-Open No. 11-350561 JP 2001-179822 A JP 2001-108162 A

In the hose shown in FIG. 5 in which the reinforcing wire 12 is disposed inside the main body 11,
A. The inner peripheral surface of the hose can be a smooth curved surface without unevenness, and the reinforcing wire 12 does not adversely affect the water flow passing through the inside of the hose.
B. There is no possibility that the reinforcing wire 12 will be caught on the outside of the hose.
C. The hose has relatively good bendability and is relatively easy to bend.
D. Since the reinforcing wire 12 is disposed inside the main body 11, there are advantages such as good appearance.

  By the way, although a hose may contact the thing of the exterior, in the hose where the reinforcement wire 12 was arrange | positioned inside the main body 11, the thickness of the part which covers the reinforcement wire 12 in the main body 21 Therefore, when the covering portion is rubbed with the thing outside the hose, there is a problem that the covering portion is peeled off from the reinforcing wire 12 and the reinforcing wire 12 is easily exposed to the outside.

On the other hand, in the hose shown in FIG. 6 in which the reinforcing wire 12 is disposed on the outer peripheral surface of the main body 11,
A. The inner peripheral surface of the hose can be a smooth curved surface without unevenness, and the reinforcing wire 12 does not adversely affect the water flow passing through the inside of the hose.
B. There is an advantage that the hose in which the reinforcing wire 12 is disposed inside the main body 11 has no problems.

However, in the hose shown in FIG.
α. The reinforcing wire 12 is easily caught on the outside of the hose.
β. Since the reinforcing wire 12 is disposed on the outer peripheral surface of the main body 11, there is a problem that the appearance of the hose is poor.

On the other hand, in the hose shown in FIG. 7 in which the reinforcing wire 12 is disposed on the inner peripheral surface of the main body 11,
A. The hose has good flexibility and is easy to bend.
B. There is an advantage that there is no problem of the hose in which the reinforcing wire 12 is disposed in the main body 11 or on the outer peripheral surface.

However, in the hose shown in FIG.
α. The reinforcing wire 12 may cause unevenness on the inner peripheral surface of the hose, and the reinforcing wire 12 may adversely affect the water flow passing through the inside of the hose.
β. When the main body 11 and the reinforcing wire 12 are not sufficiently welded, there is a problem that a gap may be formed between them.

  As described above, in the conventional hose in which the reinforcing wire 12 is provided in the main body 11 over the entire length of the hose, any type of hose has a problem.

  An object of this invention is to provide the manufacturing method of the hose which can solve the said problem.

In order to achieve the above object, the hose manufacturing method of the present invention is characterized in that constituent materials respectively supplied from a plurality of supply parts are spirally wound on a molding rotary shaft, By arranging the turning parts side by side in the axial direction and adhering the corresponding ends in the width direction in the adjacent winding parts, a tube wall part is formed , and at least one supply part is connected to another supply part. On the other hand, a method of manufacturing a hose that changes the relative positional relationship in the radial direction of the wound portions of the constituent materials supplied from the supply portions by relatively moving back and forth in the axial direction of the forming rotation shaft. Because of the relative advance and retreat of the two supply units, A first configuration form in which one of the wound portions of the constituent material supplied from each of the two supply portions is disposed radially inward with respect to the other; b. A second configuration in which the positions of the wound portions of both constituent materials are the same in the radial direction; Any one of the third configuration forms in which the one winding part is arranged radially outward with respect to the other winding part can be selected .
Note that the supply unit is A. A molding nozzle of an extruder for continuously extruding a constituent material made of a synthetic resin in a semi-molten state, or B. In some cases, a winding portion is formed by winding a pre-formed component material .
Further, in the second configuration form, the winding portions of the respective constituent materials may be alternately arranged in the axial direction.

  According to the present invention, during the manufacture of the hose, the relative positional relationship with respect to the radial direction of the winding portion of each constituent material can be changed as necessary, and the winding portion of each constituent material can be changed to the tube wall portion. Since it is possible to dispose a portion having a relative positional relationship with respect to the radial direction different from that of other portions, it is possible to satisfactorily cope with the situation where the hose is disposed and the conditions required for the hose.

It is a half sectional view showing an example of an embodiment of the invention. It is explanatory drawing which shows the manufacturing method of the hose of FIG. It is explanatory drawing which shows the manufacturing method of the hose of FIG. It is explanatory drawing which shows the manufacturing method of the hose of FIG. It is a half sectional view showing a conventional example. It is a half sectional view showing a conventional example. It is a half sectional view showing a conventional example.

  Hereinafter, an example of an embodiment in which the present invention is applied to a drainage hose will be described with reference to FIGS. FIG. 1 shows a drain hose, which is integrally formed of a synthetic resin, has flexibility, and has a circular cross section. As the synthetic resin, an olefinic synthetic resin such as EVA resin, polyethylene resin, polypropylene resin, or vinyl chloride resin is used.

  The pipe wall portion of the drainage hose is composed of first and second constituent materials 1 and 2. These constituent materials 1 and 2 are formed in a band having a constant width, wound in a spiral shape, and the wound portions of the constituent materials 1 and 2 are arranged in parallel in the axial direction. The pipe wall portion of the drainage hose has first to third juxtaposed portions 3 to 5 that are juxtaposed (connected) in the axial direction and integrally formed. The constituent materials 1 and 2 are continuously supplied from a nozzle exemplified as a supply unit in the extruder as described below. The supply unit may be a winding unit that winds up the constituent materials 1 and 2 formed in advance.

  The first juxtaposed portion 3 is shown as a first configuration form, and the first constituent material 1 constitutes the inner peripheral portion of the tube wall portion, and the second constituent material 2 constitutes the outer peripheral portion of the tube wall portion. Both constituent materials are juxtaposed in the radial direction and welded (sometimes referred to as “fused”; hereinafter the same). In this way, the winding portion of the second constituent material 2 is disposed on the outer side in the radial direction of the winding portion of the first constituent material 1. In the adjacent winding parts of the first constituent material 1, the corresponding end parts in the width direction are overlapped and welded to be integrated. Similarly, in the adjacent winding part of the 2nd component raw material 2, the edge part corresponding to the width direction is overlapped and welded, and is integrated.

  The 2nd juxtaposed part 4 is shown as a 2nd structure form, and is arranged in parallel so that each winding part of the 1st, 2nd structural raw materials 1 and 2 may become alternate in an axial direction. In this way, the positions in the radial direction of the wound portions of the constituent materials 1 and 2 are (substantially) the same. In the adjacent wound portions of the constituent materials 1 and 2, the corresponding end portions in the width direction are overlapped and welded to be integrated.

  The 3rd juxtaposed part 5 is shown as a 3rd structure form, and while the 1st structural material 1 comprises the outer peripheral part of a pipe wall part, the 2nd structural material 2 comprises the inner peripheral part of a pipe wall part. The two constituent materials 1 and 2 are juxtaposed in the radial direction, welded, and integrated. In this way, the winding portion of the second constituent material 2 is disposed radially inward of the winding portion of the first constituent material 1. In the adjacent winding parts of the first constituent material 1, the corresponding end parts in the width direction are overlapped and welded to be integrated. Similarly, in the adjacent winding part of the 2nd component raw material 2, the edge part corresponding to the width direction is overlapped and welded, and is integrated.

  Next, the manufacturing method of the said drainage hose is demonstrated based on drawing of FIGS. 2 to 4 are not sectional views, but for the sake of clarity, in these drawings, the first component material 1 is hatched with a diagonal line rising to the right, and the second component material 2 is It is hatched with a diagonal line rising to the left.

  First, when manufacturing the 1st juxtaposed part 3 of the pipe wall part of a drainage hose and comprising a 1st structure form, as shown in FIG. 2, the shaping | molding nozzle 7 of the extruder for 1st structure materials Is placed in front of the molding nozzle 8 of the extruder for the second constituent material, and is spaced farther to the right. Then, from the molding nozzle 7 of the extruder for the first constituent material, the belt-shaped first constituent material 1 having a certain width made of a semi-molten vinyl chloride resin or the like is continuously extruded and placed on the molding rotary shaft 9. The inner periphery of the tube wall portion is formed by spirally winding and overlapping the corresponding end portions in the width direction at adjacent winding portions and welding them together.

  At the same time, a band-shaped second component material 2 made of a semi-molten vinyl chloride resin or the like is continuously extruded from the molding nozzle 8 of the extruder for the second component material. It winds spirally on the inner peripheral part of the formed tube wall part, welds to this inner peripheral part, and overlaps the corresponding end part in the width direction in the adjacent wound part of the second constituent material 2 By combining and welding together, the outer peripheral part of the tube wall part is formed.

  2 to 4, the forming nozzle 7 of the extruder for the first constituent material is arranged on the lower side of the paper surface than the rotary shaft 9 for forming, and the forming nozzle of the extruder for the second constituent material is used. 8 is arranged on the upper side of the drawing surface relative to the molding rotary shaft 9. This is arranged for convenience in order to make it visually easy to understand. Actually, for example, both molding nozzles 7 and 8 are moved closer to each other in the circumferential direction centered on the axis of the molding rotary shaft 9. It may be arranged. In other words, the arrangement of the molding nozzles 7 and 8 is appropriately changed according to the production status and production conditions of the hose.

  Further, when the second juxtaposed portion 4 of the pipe wall portion of the drainage hose is manufactured to constitute the second configuration form, as shown in FIG. 3, the molding nozzle 7 of the extruder for the first constituent material is used. Is relatively moved in the axial direction of the molding rotary shaft 9 and is brought close to the molding nozzle 8 of the extruder for the second constituent material, and is arranged slightly rearward, that is, on the left side. Then, the first constituent material 1 is continuously extruded from the molding nozzle 7 of the extruder for the first constituent material and wound spirally on the molding rotary shaft 9, and the winding portions are spaced apart. Install side by side in the axial direction.

  At the same time, the second constituent material 2 is continuously extruded from the molding nozzle 8 of the extruder for the second constituent material, and between the adjacent wound portions of the first constituent material 1 on the rotating shaft 9 for molding. By winding in a spiral shape, the winding portions of the constituent materials 1 and 2 are alternately arranged in the axial direction. And in an adjacent winding part, the edge part corresponding to the width direction is piled up, and a pipe wall part is formed by welding integrally.

  Furthermore, when the 3rd parallel arrangement part 5 of the pipe wall part of a drainage hose is manufactured and a 3rd structure form is comprised, as shown in FIG. 4, the shaping | molding nozzle 7 of the extruder for 1st structure materials Is relatively moved in the axial direction of the molding rotary shaft 9 and further retracted from the molding nozzle 8 of the extruder for the second constituent material to be largely separated. Then, the second component material 2 is continuously extruded from the molding nozzle 8 of the extruder for the second component material, wound spirally on the molding rotary shaft 9, and in the adjacent wound part, in the width direction. Are overlapped and welded together to form the inner peripheral portion of the tube wall portion.

  At the same time, the first constituent material 1 is continuously extruded from the molding nozzle 7 of the extruder for the first constituent material, and spirally formed on the inner peripheral portion of the tube wall portion formed by the second constituent material 2. Winding and welding to this inner peripheral part, and overlapping the corresponding end parts in the width direction in the adjacent wound parts of the first constituent material 1 and welding together, the outer peripheral part of the tube wall part Form.

  In addition, for the convenience of manufacture of the drainage hose, a slightly disturbed part that does not belong to any of the parallelly arranged parts 3 to 5 may occur at the boundary between the parallelly arranged parts 3 to 5. It does not have a big influence on.

  According to the above configuration example, during the manufacture of the drainage hose, the relative positional relationship with respect to the radial direction of the wound portions of the constituent materials 1 and 2 can be changed as necessary. -Since the 3rd juxtaposed parts 3-5 can be arrange | positioned suitably, it can respond | correspond favorably to the condition by which the drain hose is arrange | positioned and the condition requested | required of a drain hose.

  In the above configuration example, the number of the constituent materials is two, but the number of the constituent materials may be three or more. In that case, each supply unit is centered with respect to the other supply units. It may be moved forward and backward relative to the direction. In the above configuration example, the constituent materials are welded, but may be fixed using, for example, an adhesive.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a manufacturing method of a drain hose (for extension) such as an electric washing machine or an air conditioner, or a drain hose for underground burial.

1, 2 First and second constituent materials 3-5 First to third juxtaposed parts 7, 8 Molding nozzle (supply part)
9 Shaft for molding

Claims (3)

The component materials respectively supplied from the plurality of supply units are spirally wound on the molding rotary shaft,
These winding parts are juxtaposed in the axial direction,
By adhering the corresponding end in the width direction at the adjacent winding part,
Configure the pipe wall ,
By advancing and retracting at least one supply part relative to the other supply part in the axial direction of the molding rotary shaft,
A hose manufacturing method for changing the relative positional relationship in the radial direction of the wound portion in each constituent material supplied from these supply portions ,
Due to the relative advance and retreat of the two supply units,
A. One of the wound portions of the constituent material supplied from the two respective supply unit, relative to the other, a first arrangement embodiment which is arranged inward radial direction toward,
B. A second configuration form in which the positions in the radial direction of the winding parts of both constituent materials are the same;
C. The hose manufacturing method in which one of the third configuration forms in which the one winding part is arranged radially outward with respect to the other winding part can be selected . Supply section
A. Molding nozzle of an extruder that continuously extrudes a constituent material made of a semi-molten synthetic resin, or
B. The method for manufacturing a hose according to claim 1, wherein the hose is a winding portion formed by winding a preformed constituent material. The manufacturing method of the hose of Claim 1 or 2 with which the winding part of each structural material is alternately arrange | positioned by the 2nd structure form in an axial center direction.

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