JPH0550525A - Continuous production method for uneven hose - Google Patents

Abstract

(57) [Abstract] [Purpose] A continuous hose manufacturing method with irregular cross-section. [Constitution] While moving the hose body and its material continuously or intermittently, the tip part is a core having a desired cross-sectional shape for forming the required inner circumference of the hose body, and the root part is a long sheet. After covering the guide part of the cantilever shaft, which is composed of a guide for making it into a tubular shape, with a long sheet of material to make it into a tubular shape. The hose body is formed by joining both ends of the cylindrical long sheet, and then, in the core part, set the injection mold for integrally molding the protrusion on the outer periphery of the hose body, The constituent materials are injected and molded integrally with the uneven hose. It is also possible to form a reinforcing rib or flange on a flexible deformed hose. Suitable for air conditioning and utility duct manufacturing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously manufacturing a hose having irregularities, and can be used particularly for manufacturing a hose having a modified cross section with a reinforcing rib or a flange. The hose generally refers to a flexible pipe, but it is also used here to mean a large-diameter pipe, a duct, etc., which are slightly less flexible.

[0002]

2. Description of the Related Art Conventionally, a cylindrical hose with unevenness has been in great demand, and a well-known continuous manufacturing method has been widely practiced. There was no good continuous manufacturing method. For this reason, if a hose with irregular cross-section is required, we know that it is inefficient, and post-process the cylindrical hose with irregularity to transform it into the required cross-sectional shape, or use blow molding. It was manufactured.

However, the manufacturing technology for the modified cross-section hose has been gradually developed. For example, Japanese Patent Publication No. 59-30534 discloses a continuous manufacturing apparatus for a rectangular hose, which is disclosed in Japanese Patent Laid-Open No. 3-75111.
The publication describes a method of manufacturing a hose with irregularities, which can also manufacture a hose with irregular cross-section. The irregularities on the outer circumference of the hose body are provided for the purpose of reinforcing ribs and flanges.

[0004]

Recently, in order to efficiently use the space of buildings and civil engineering structures, air-conditioning ducts, utility piping ducts and the like are required to have a hose with an irregular cross section. Is increasing. However, although a hose having a modified cross section can be manufactured by the apparatus described in Japanese Patent Publication No. 59-30534,
The device is complicated and inefficient. In addition, JP-A-3-751
In the method described in Japanese Patent Publication No. 11, since the hose body is molded by the extrusion method, the materials that can be used for the hose body are limited,
For example, you cannot use rubberized cloth on the hose wall. In addition, since the core for forming the required inner surface cannot be inserted into the hose body, use of a flexible material at room temperature or a material that may be deformed by heat and pressure when forming the protrusions Will be limited.

[0005]

Therefore, the inventors of the present invention have studied the continuous production method of a hose with irregular cross-section having an irregular cross section, in which the material used is not limited and the desired material can be used freely. Completed the invention.

The present invention continuously or intermittently supplies a long sheet which is a material of a hose body, and a. First, the root portion is a guide for forming a long sheet in a tubular shape, and the tip portion is a guide portion of a cantilever shaft that is configured by a core for forming a hose body into a desired inner peripheral shape. Cover with a long sheet to form a tube, b. Both ends of a tubular long sheet are joined to form a tubular body, and c. Covering the core with the cylindrical body to form a hose body having a desired inner peripheral shape; d. After setting an injection molding die using this hose body as an insert, injection molding is performed to integrally form a convex portion on the outer circumference of the hose body, and e. A continuous manufacturing method for a concave-convex hose, characterized in that the molded concave-convex hose is separated from the core and the injection mold to manufacture a concave-convex hose.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to better understand the method for continuously manufacturing a hose with projections and depressions according to the present invention, specific embodiments will be given and described with reference to the drawings. FIG. 1 is a schematic view of an example of an embodiment of a continuous method for producing a hose with projections and depressions of the present invention. Figure 2
2 is a sectional view taken along the line AA ′ in FIG.

First, the long sheet 1 which is the material of the wall of the hose with protrusions and recesses, that is, the hose body 4 is supplied from the feed roll 5 also serving as the widthwise extension, and the root portion forms the long sheet 1 into a tubular shape. The guide 6 is a tubular shape by covering the guide 6 portion of the cantilever shaft, the tip portion of which is formed by the core 9 for forming the hose body 4 into a desired inner peripheral shape.
Here, the guide 6 has a function of a jig that bends the long sheet 1 into a tubular shape and joins both end portions 2 thereof. In the present embodiment example, the cantilever shaft is bent in an L-shape in the axial direction at the guide 6 portion. The cross-sectional shape of the guide 6 portion is usually not uniform, and is a shape that is convenient for bending the long sheet 1 into a tubular shape and joining both end portions 2 thereof. Long sheet 1
If the guide 6 alone is not sufficient to form the tubular shape, the guide 6 is used as an envelope and, for example, a ring-shaped auxiliary guide is used, and the long sheet 1 is passed through the inside thereof to form the tubular shape. Can be made easier.

The material of the hose body 4 is not particularly limited as long as it is not an unsuitable material for the hose. For example, sheets and cloths of plastics and rubber and these foams,
It is possible to use leather, paper, or a composite material such as rubberized cloth or glass-filled plastic. Alternatively, a semi-cured sheet such as a prepreg may be used to form a tubular body having a desired cross-sectional shape and then cured to form a hose body.
The long sheet 1 usually uses a single sheet, but in a special case, a plurality of sheets are stacked for the purpose of making the wall of the hose double or using different materials for one part, Or they can be used side by side.

Next, both end portions 2 of the tubular sheet are joined together to form a tubular body 3. The cylinder 3 is formed by the guide 6
It may be performed between the core 9 and the core 9 or after being covered with the core 9, or may be performed while shifting from the guide 6 to the core 9. As the joining means, adhesion, fusion bonding, pressure bonding, crimping, suturing, or the like is used depending on the materials used. In this example of the embodiment, after applying the adhesive to both end portions 2 of the sheet by the adhesive application device 7, the sheets are joined and the joined portion is pressed by the press roll 8 to be adhered to form the tubular body 3. Press roll 8
Has an action of pressing the joint portion and pulling the long sheet 1 from the feed roll 5.

The cylindrical body 3 formed in this way is the core 9
The core 9 that has been moved to the part and the shape of the inner circumference is inserted
The hose body 4 has the same cross-sectional shape as that of FIG. This cross-sectional shape can be set to a cylindrical shape as well as a required irregular cross section such as a triangle or a quadrangle. Then, using the hose body 4 as an insert, an injection molding die 10 for integrally molding a convex portion on the outer periphery thereof is set by a mold clamping device (not shown). The injection molding die 10 usually includes an upper die and a lower die.

When the setting is completed, an injection device (not shown)
Through the nozzle 16 and runner 15 to the cavity 1
4 is injected with the material for forming the convex portion, and the convex portion is fused to the outer circumference of the hose body 4 to be integrally molded. The convex component material is vinyl chloride,
Polyolefins, plastics such as synthetic rubber, or fiber reinforced products thereof are used. Hose body 4
Since the core 9 is inserted in the hose, the hose body 4 is not deformed by heat or pressure during injection molding, and a hose having a precise shape can be manufactured using any material. When the injection molding is completed, the injection molding die 10 is opened, and the manufactured concavo-convex hose 17 is detached from the apparatus by the take-up device 11.

The process operation described above is performed for the long sheet 1.
Is continuously or intermittently supplied, and the cylinder body 3, the hose body 4 and the like are continuously or intermittently moved. The selection of the transfer method depends on the economy, etc., but continuous transfer may complicate the device.

Further, it is preferable that the cantilever shaft used in the present invention is hollow and a large number of small holes 13 communicating with the hollow portion 12 are provided in the core 9. By depressurizing the hollow portion 12, the hose body 4 is brought into close contact with the core 9 to form a precise inner peripheral surface, and by pressurizing, the hose body 4 can be separated from the core 9 and smoothly moved. Is.

[0015]

EFFECTS OF THE INVENTION By using the method for continuously manufacturing a hose with projections and depressions according to the present invention, there are no restrictions on the materials used, and even if the hose body is flexible, it may be deformed due to heat and pressure during molding of the convex portion, The optimum material can be freely used to continuously manufacture the hose with irregular cross-section.
For example, a flexible hose body can be formed with reinforcing ribs and flanges that also serve as shape retention and reinforcement, and can be flexed freely in the longitudinal direction, but its cross-section maintains the required shape and is light and has a large diameter. It is possible to manufacture a hose with irregular cross section. The cross-sectional shape of the convex portion can be freely changed, and its direction can be formed in a ring shape or a linear shape.

Further, by appropriately adjusting the supply of the long sheet and the injection molding of the convex portion, for example, a flange or the like can be provided at an arbitrary position of the hose body. Further, by exchanging the cantilever shaft and the injection molding die during the production of the hose, it is possible to produce a hose having an irregular cross-section having a partially different cross-sectional shape or convex shape.

[Brief description of drawings]

FIG. 1 is a schematic view of an example of an embodiment of a continuous method for manufacturing a hose with projections and depressions of the present invention.

FIG. 2 is a sectional view taken along the line AA ′ in FIG.

[Explanation of symbols]

1: Long sheet 2: Side end 3: Cylindrical body 4: Hose body 5: Feed roll 6: Guide 7: Adhesive coating device 8: Press roll 9:
Core 10: injection molding die 11: take-up device 1
3: Small hole 17: Hose with unevenness

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B29C 69/02 8115-4F F16L 11/04 7123-3J // B29L 23:18 4F

Claims (1)

[Claims] 1. A long sheet which is a material for a hose body is continuously or intermittently supplied, and a. First, the root portion is a guide for forming a long sheet in a tubular shape, and the tip portion is a guide portion of a cantilever shaft that is configured by a core for forming a hose body into a desired inner peripheral shape. Cover with a long sheet to form a tube, b. Both ends of a tubular long sheet are joined to form a tubular body, and c. Covering the core with the cylindrical body to form a hose body having a desired inner peripheral shape; d. After setting an injection molding die using this hose body as an insert, injection molding is performed to integrally form a convex portion on the outer circumference of the hose body, and e. A continuous manufacturing method for a hose having irregularities, characterized in that the molded hose having irregularities is separated from the core and the injection mold to produce a hose having irregularities.