JP4690599B2 - Extruded tube - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an extruded pipe, and more particularly to an extruded pipe that is suitably used as a water pipe installed in a building.
[0002]
[Prior art and issues]
Conventionally, distribution pipes used for water supply, sewage, etc. inside buildings are mainly single-layer resin-molded resin pipes or two-layer resin-molded pipes in which the outer periphery of a soft pipe is covered with a hard pipe. Used to.
[0003]
However, conventionally used water distribution pipes have difficulty in effectively preventing vibrations and noise resulting from the flow of liquid.
[0004]
Accordingly, an object of the present invention is to provide an extruded pipe that can effectively prevent generation of vibration and noise and can be suitably used as a water distribution pipe.
[0005]
Configuration, operation and effect of the invention
In order to achieve the above object, an extruded tube according to the present invention is a soft resin material having a core tube body made of a hard material and a plurality of through holes coated on the outer peripheral surface of the core tube body by extrusion molding. And an exterior body made of a hard resin material coated on the outer peripheral surface of the vibration absorption / sound absorption body by extrusion molding.
[0006]
The extruded tube according to the present invention having the above-described configuration has a three-layer configuration of a core tube body, a vibration absorbing / sound absorbing member, and an exterior body, and the middle layer absorbing / sound absorbing member is made of a soft resin material and has a plurality of through holes. Therefore, the vibration / noise generated when the liquid flows through the core tube can be effectively absorbed. Further, the seismic absorption / sound absorbing body and the exterior body are formed by extrusion molding, so that mass production is possible.
[0007]
In the extruded tube according to the present invention, the cross section of the vibration absorbing / sound absorbing body has, for example, a substantially honeycomb shape, a collective shape of minute circular holes, or a collective shape of rectangular holes (long holes or square holes).
[0008]
The core tube is made of aluminum, steel, polypropylene, ABS, hard polyvinyl chloride, AES, or polycarbonate, and the vibration absorber / sound absorber is made of soft polyvinyl chloride, olefin elastomer, or styrene elastomer. The exterior body is preferably made of hard polyvinyl chloride, ABS, polypropylene, polycarbonate, or AES.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an extruded tube according to the present invention will be described with reference to the accompanying drawings.
[0010]
FIG. 1 shows a cross-sectional shape in each embodiment of the extruded tube according to the present invention (each 1/4 square is shown). These extrusion-molded tubes are a soft resin having a core tube body 1 made of a hard material and any of a plurality of through-holes 2a, 2b, 2c, 2d coated on the outer peripheral surface of the core tube body by extrusion molding. The vibration-absorbing / sound-absorbing body 2 made of a material and the exterior body 3 made of a hard resin material coated on the outer peripheral surface of the vibration-absorbing / sound-absorbing body by extrusion molding are provided.
[0011]
The through hole 2a shown in FIG. 1 (A) has a substantially rhombus shape, and the cross section of the vibration absorbing / sound absorbing body 2 has a substantially honeycomb shape. The through-hole 2b shown in FIG. 1 (B) is a microcircular hole, and the cross section is a collective shape thereof. The through-hole 2c shown in FIG. 1C is a long hole extending radially, and the cross section thereof is a collective shape thereof. The through-hole 2d shown in FIG. 1D is a square hole, and the cross-section is a collective shape thereof.
[0012]
As a material, the core tube 1 is made of any one of aluminum, steel, polypropylene, ABS, hard polyvinyl chloride, AES, and polycarbonate. The vibration absorbing / sound absorbing body 2 is made of any one of soft polyvinyl chloride, olefin elastomer, and styrene elastomer. The outer package 3 is made of any one of hard polyvinyl chloride, ABS, polypropylene, polycarbonate, and AES. However, these materials are merely examples, and other materials can be used.
[0013]
FIG. 2 shows three examples of the overall cross-sectional shape of the extruded tube. 2 (A) shows the core tube body 1 and the outer body 3 having a circular cross section, FIG. 2 (B) shows the core tube body 1 and the outer body 3 having a square cross section, and FIG. 2 (C) shows the core. The tubular body 1 shows a circular cross section, and the exterior body 3 has a rectangular cross section. Other combinations may be used. For example, the core tube body 1 may have a square cross section and the exterior body 3 may have a circular cross section.
[0014]
The extruded tube having the above-described structure has a three-layer structure of the core tube body 1, the vibration absorbing / sound absorbing member 2, and the exterior body 3, and the middle layer absorbing / sound absorbing member 2 is made of a soft resin material and includes a plurality of through holes 2a, Since it has any one of 2b, 2c, and 2d, it is possible to effectively absorb vibration / noise when the liquid flows through the core tube body 1.
[0015]
Next, a manufacturing facility for the extruded pipe will be schematically described.
As shown in FIGS. 3 and 4, this manufacturing facility includes a first extruder 10, a second extruder 20, a coating die 30, and a vacuum sizing 40, and a feed roller 51 and a take-up roller 52 along the conveyance direction A. Is installed, and a cutting machine (not shown) is installed downstream of the take-up roller 52. The coating die 30 is composed of molds 31, 32, 33, 34 and a guide mold 35. Although FIG. 4 is a cross-sectional view, in order to avoid the complexity of the drawing, only the material is hatched, and hatching is omitted in the cross section of the equipment.
[0016]
Specifically, the core tube 1 is supplied in the direction of arrow A and is inserted into the coating die 30 from the guide mold 35. The molten resin material 2 ′ of the vibration absorbing / sound absorbing body 2 is supplied from the first extruder 10 to the coating die 30 and is extruded onto the outer peripheral surface of the core tube body 1 with a die (not shown) into a predetermined cross-sectional shape. The body 2 is molded. At the same time, the molten resin material 3 ′ of the outer package 3 is supplied from the second extruder 20 to the coating die 30, and is extruded into a predetermined cross-sectional shape on the outer peripheral surface of the vibration absorbing / sound absorber 2 by a die (not shown). Is formed. The shock absorber / sound absorber 2 is fused to the core tube 1, the exterior body 3 is fused to the shock absorber / sound absorber 2, and the coating die 30 is appropriately controlled in temperature to be cured into a predetermined shape.
[0017]
The vacuum sizing 40 cools the molded product and prepares the outer peripheral surface of the exterior body 3. The extruded tube formed in this way is cut to a predetermined size after the take-up roller 52.
[0018]
(Other embodiments)
In addition, the extruded tube which concerns on this invention is not limited to the said embodiment, It can change variously within the range of the summary.
[0019]
In particular, the materials of the core tube body, the vibration absorbing / sound absorbing body, and the exterior body and combinations thereof are arbitrary. Also, manufacturing equipment and manufacturing methods other than those shown in FIGS.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating various embodiments of an extruded tube according to the present invention, and particularly illustrates the cross-sectional shape of a vibration absorbing / sound absorbing body.
FIG. 2 is a cross-sectional view showing various embodiments of an extruded tube according to the present invention, and particularly exemplifies cross-sectional shapes of a core tube body and an exterior body.
FIG. 3 is a perspective view showing an equipment for manufacturing an extruded pipe according to the present invention.
4 is a cross-sectional view of the manufacturing facility shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Core tube body 2 ... Seismic absorption / sound absorption body 2a, 2b, 2c, 2d ... Through-hole 3 ... Exterior body

Claims (5)

A core tube made of a hard material;
An earthquake / sound absorber made of a soft resin material having a plurality of through-holes coated by extrusion on the outer peripheral surface of the core tube body;
An exterior body made of a hard resin material coated by extrusion on the outer peripheral surface of the vibration absorbing / sound absorbing body;
An extruded tube characterized by comprising: The extruded tube according to claim 1, wherein the vibration absorbing / sound absorbing body has a substantially honeycomb cross section. The extruded tube according to claim 1, wherein the vibration absorbing / sound absorbing body has a cross-sectional shape of a collection of minute circular holes. 2. The extruded tube according to claim 1, wherein the vibration absorbing / sound absorbing body has a cross-sectional shape of a rectangular hole. The core tube body is made of any of aluminum, steel, polypropylene, ABS, hard polyvinyl chloride, AES, polycarbonate,
The vibration absorber / sound absorber is made of any one of soft polyvinyl chloride, olefin elastomer, and styrene elastomer,
The exterior body is made of hard polyvinyl chloride, ABS, polypropylene, polycarbonate, or AES.
The extruded tube according to claim 1, 2, 3, or 4.

Images