JP4342228B2 - Inner smooth bore composite hose - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention forms a smooth surface (smooth bore) on the inner surface of the composite hose so that the fluid in the hose can flow smoothly, and a material that forms a smooth surface corresponding to the physical properties of the fluid. By doing so, it is intended to give the composite hose multiple functions.
[0002]
[Prior art]
The composite with the hose inner surface smoothed will be described with reference to FIG.
A composite hose indicated by reference numeral 10 'has a triangular inner spiral ring 1' having a wetted surface as a flat surface 11 'as a core material, and an inner cloth 2' made of a synthetic resin material such as polyester on the surface of the core material. And a laminated layer 3 '(31', 31 ') made of a film formed by winding a synthetic resin film such as polypropylene on the inner cloth surface, and a synthetic resin such as polyester is provided on the film layer 3'. An outer cloth 4 'made of a material is wound, and an outer spiral ring 5' is wound around the surface of the outer cloth 4 'while being shifted by 1/2 pitch from the spiral pitch of the inner spiral ring 1. .
[0003]
The liquid contact surface of the composite hose 10 ′ thus configured forms an inner spiral ring. Although a substantially flat surface is formed by the flat surface 21 'of the inner cloth 2 of the flat surface 11', it is not necessarily perfect to induce a smooth flow to the fluid. Moreover, since the fluid flowing in the hose enters between the films forming the laminated body 3 'and exists as a residual liquid, the purpose of use is limited.
[0004]
[Problems to be solved by the invention]
In the conventional composite hose, the inner spiral ring 1 'and the outer cloth 2' are in direct contact with the fluid. In order to deal with the nature of the fluid, the nature of the inner spiral ring and the inner cloth is changed to the nature of the fluid. The degree of freedom in design was small.
In order to solve this problem, a flexible hose with a smooth hose inner surface is formed by combining a composite hose and a bellows hose mainly composed of TPE (Thermo-plastic Elastomer).
Since TPE does not contain a halogen-based substance, it does not generate harmful gases such as dioxins during high-temperature combustion, so it is also an environmental hormone countermeasure.
[0005]
[Means for Solving the Problems]
The present invention intends to provide various functions to the composite hose by forming a smooth hose using a material corresponding to the nature of the fluid on the wetted surface of the conventional composite hose. More specifically, by combining a conventional composite hose and a hose mainly composed of T · P · E (Thermo-plastic Elastomer), a flexible hose with a smooth hose inner surface is formed.
[0006]
【Example】
In the following description, I and II are examples of the related art, and III is an example of the present invention.
Part I: Means for producing a composite hose having an inner smooth bore will be described in the following with reference to FIG.
1. A polyethylene (PE) tape (0.3 to 0.5 mmt × 50 to 60 mm width) 1 is wound around an iron core (mandrel) M.
2. An olefin-based or styrene-based thermoplastic elastomer “TPE” tape (1 to 2 mmt × 50 to 60 mm width) 2 is wound around the tape 1.
3. A triangular galvanized copper wire or stainless inner spiral ring 3 is wound around the tape 2.
4). The same thermoplastic elastomer tape as the tape 2 is wound as the inner cloth 4.
5. A polyester cloth or nylon cloth (polyamide) 5 is wound as a reinforcing layer. 6). Finally, a galvanized copper wire or stainless outer spiral ring 6 is wound as necessary.
7). The hose thus formed is heated at a required temperature to heat-weld the polyethylene 1, TPE tape 2, and the inner cloth 4 as the hose forming material.
As is apparent from the figure, the overlapping portions K and K of the polyethylene tape 1, the TPE tape 2 and the inner cloth 4 made of TPE are welded in a state of including the inner spiral ring 3, and form a hose. Intrusion of fluid into the laminate 5 and the surface of the inner spiral ring is completely prevented.
8). After forming the hose by the above-described procedure, the hose is taken out from the mandrel to obtain the composite hose 10 having the inner smooth bore.
[0007]
Its II: is as follows if described manufacturing means of the composite hose of the inner surface smooth bore in the bullet with reference to FIG.
1. A fluororesin shrinkable tube 7 is inserted into an iron core (mandrel) M, the heated tube is shrunk, and then a surface treatment is performed for bonding.
2. EPDM rubber tape 2 (1-2 mmt × 50-60 mm width) is wrapped around the tube 7 and wound.
3. A spiral ring 3 of a galvanized copper wire having a triangular cross section is wound.
4). The same rubber tape as 2 above is wound on the inner spiral ring as an inner cloth.
5. A polyester cloth or nylon cloth (polyamide) 5 is stacked on the rubber tape as a reinforcing layer and wound to form a laminate.
6). Wind a galvanized copper wire or stainless steel outer spiral wheel 6.
7). After the outer spiral ring 6 is wound and formed as a hose body, the whole is heated, and the respective contact portions of the fluororesin tube 7, the EPDM rubber tape 2, and the EPDM rubber tube 4 sandwiching the inner spiral ring 3 Heat weld.
8). After forming the hose by the above-described procedure, if the hose is taken out from the mandrel M, a composite hose 10 having an inner smooth bore can be obtained.
Further, as is apparent from the figure, the overlapping portions K and K of the EPDM rubber 2 and the inner cloth 4 made of the same material are welded in a state of including the inner spiral ring 3, so that a layer forming a hose is formed. Intrusion of fluid into the tape of the body 5 and the surface of the inner spiral ring is completely prevented.
[0008]
Part III: Means for producing a composite hose having an inner surface smooth bore will be described as a clause with reference to FIG. 3 as follows.
1. A mesh 8 of polypropylene (PP) is wound around an iron core (mandrel) M.
2. A triangular galvanized copper wire or stainless inner spiral ring 3 is wound around the mesh 8.
3. A tape 4 (1-2 mmt × 50-60 mm width) of an olefin-based or styrene-based thermoplastic elastomer “TPE” is overlapped on the inner spiral ring and wound.
4). A polyester cloth or nylon cloth (polyamide) 5 is stacked on the tape 4 as a reinforcing layer and wound.
5. Wind a plated steel wire or stainless outer spiral wheel 6.
6). After forming the hose body by winding the outer spiral wheel of the previous item 3, the hose body is removed from the mandrel M.
7). A tube (same material as in the previous third item) 2 made of an olefin-based or styrene-based thermoplastic elastomer “TPE” is inserted into the hollow portion of the hose body removed from the mandrel.
8). Seal one side of the tube 2 inserted in the hollow portion of the hose, inject steam from the opposite side to expand the tube 2 and pass the surface of the tube 2 through the polypropylene mesh 8 at the contact portions K, K with the TPE tape 4 Heat weld.
9. The hose obtained through the manufacturing steps 1 to 8 is a composite hose 10 having an inner smooth bore.
[0009]
【The invention's effect】
In this invention, an inner spiral ring is held in a sandwiched manner between an inner cloth made of thermoplastic elastomer (TPE), an inner cloth that is polymerized in the hollow portion of the hose body, and a hollow cylinder of the same effect material. A fabric and a hollow cylinder are heat-welded at the contact part except for the inner spiral ring to form a smooth hose inner composite hose. Between the inner spiral ring and the inner fabric, which cannot be solved with a conventional composite hose Therefore, the fluid can be transferred smoothly.
Further, the present invention can function as a hose adapted to the nature of the fluid by selecting a material for forming the hollow cylinder.
In addition, since the sealing performance of the entire composite hose is improved by the presence of the hollow cylinder, the thickness of the laminated body forming the composite hose body and the shape of the inner spiral ring and the outer spiral ring can be reduced. Can reduce the weight.
In addition, since the composite hose of the smooth bore according to the present invention has a configuration in which the inner cloth and the hollow cylinder are welded, the fluid flowing in the hose is prevented from entering the laminated or reinforcing layers. It can be used as a food hose.
In addition, since the material for forming the inner cloth and the hollow cylinder is formed of a thermoplastic elastomer (TPE), a hose that meets various standards can be formed.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an example of a technique related to the present invention.
FIG. 2 is an explanatory diagram of an example of a technique related to the present invention.
3 is an explanatory view of the solid施例of the present invention.
FIG. 4 is an explanatory diagram of a conventional composite hose.

Claims (1)

A first step of winding a polypropylene mesh (8) around an iron core (M) ;
After the first step, a second step of winding a triangular galvanized copper wire or a stainless inner spiral on the mesh (8) ;
After the second step, a third step of winding an olefin-based or styrene-based thermoplastic elastomer “TPE” tape (4) on the inner spiral ring,
After the third step, and the winding Ku fourth step polyester fabric or nylon fabric (5) superimposed on the tape (4) as a reinforcing layer,
A fifth step of forming a hose body by winding a plated steel wire or stainless outer spiral ring (6) after the fourth step;
After the step 5, the sixth step of removing the hose body from the iron core;
A seventh step of inserting a tube (2) made of an olefin-based or styrene-based thermoplastic elastomer “TPE” into the hollow portion of the hose body removed from the iron core in the sixth step;
After said seventh step to seal one side of the tube (2) inserted in the hollow portion of the hose, the polypropylene surface of the tube (2) with inflating the tube put vapor (2) from the other side An eighth step of heat-welding through the mesh (8) at the contact portion (K) with the tape (4) ;
Hose manufactured by.