KR20180079948A - synthetic resin water pipe prevented from edge transformation, manufacturing device for its extrusion and manufacturing method thereof - Google Patents

synthetic resin water pipe prevented from edge transformation, manufacturing device for its extrusion and manufacturing method thereof Download PDF

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Publication number
KR20180079948A
KR20180079948A KR1020170000730A KR20170000730A KR20180079948A KR 20180079948 A KR20180079948 A KR 20180079948A KR 1020170000730 A KR1020170000730 A KR 1020170000730A KR 20170000730 A KR20170000730 A KR 20170000730A KR 20180079948 A KR20180079948 A KR 20180079948A
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KR
South Korea
Prior art keywords
pipe
synthetic resin
tube
cooling air
circumferential surface
Prior art date
Application number
KR1020170000730A
Other languages
Korean (ko)
Inventor
임윤수
Original Assignee
주식회사 프라코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 프라코 filed Critical 주식회사 프라코
Priority to KR1020170000730A priority Critical patent/KR20180079948A/en
Publication of KR20180079948A publication Critical patent/KR20180079948A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/025—Water supply lines as such, e.g. shower hoses
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks

Abstract

The present invention relates to an apparatus for producing a synthetic resin pipe via extrusion molding, and a method for producing the synthetic resin pipe. More specifically, by making hardness of an inner circumferential surface of the synthetic resin pipe higher than that of an outer circumferential surface, it is possible to prevent deformation of a tip end (an edge) of a cutting part. To this end, the apparatus includes an extrusion molding device, a through-hole, and a cooling air supply pipe.

Description

TECHNICAL FIELD The present invention relates to an extrusion molding apparatus and an edge deformation preventing synthetic resin pipe for preventing edge deformation,

The present invention relates to an edge deformation-preventing synthetic resin water pipe, an apparatus for producing an extrusion-forming pipe for the water pipe, and a method of manufacturing an edge deformation-preventing synthetic resin water pipe. More particularly, the present invention relates to an edge deformation- Edge edged synthetic resin water pipe, an apparatus for producing an extrusion molding of the water pipe, and a method of manufacturing an edge deformation-preventing synthetic resin water pipe.

Generally, synthetic resin pipe is a typical extruded material, and it has hard PVC (PVC) pipe and polyethylene (PE) pipe. It is used for piping pipes for cables and cables, insulation pipes, It is used for various purposes such as water pipe, water and sewage pipe.

The present invention relates to a conventional apparatus for producing a synthetic resin tube, and an example of a conventional apparatus for producing a synthetic resin tube is disclosed in Korean Patent No. 0546744 entitled " Extrusion molding apparatus for a synthetic resin tube " Molding apparatus ") as follows.

The conventional extrusion molding apparatus for a synthetic resin pipe is characterized by extruding a synthetic resin tube long enough to intermittently inject synthetic resin materials having different hues to form a synthetic resin tube exhibiting two colors.

However, the conventional synthetic resin pipe manufactured through the manufacturing apparatus of the synthetic resin pipe has the same hardness between the inner circumferential surface and the outer circumferential surface, so that the inner circumferential surface of the synthetic resin pipe, which is in direct contact with the fluid such as liquid, gas or slurry, It had problems to shorten.

When a synthetic resin tube is manufactured through a conventional apparatus for manufacturing a synthetic resin tube, the end of the synthetic resin tube discharged through the extrusion apparatus is first inwardly protruded and deformed, or when the end of the cut portion is curled inward There is a problem that it comes in and deforms.

Therefore, in the conventional art, the end of the first synthetic resin pipe and the end portion cut to a predetermined length are cut and removed. When the cut end of the synthetic resin pipe is cooled and then the synthetic resin pipe is cooled, The hardness of the cutting portion is increased, and the cutting portion is broken frequently.

In addition, there is a problem that the quality of the product is lowered due to the deformation of the end of the synthetic resin pipe during the manufacturing process of the synthetic resin pipe, the end is cut off and the material is lost, and the post- There is a problem such that a lot is required.

"Extrusion Molding Apparatus for Synthetic Pipes", Korea Patent No. 0546744 (Registered on January 19, 2006)

Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

It is an object of the present invention to provide a synthetic resin water pipe which directly contacts with a fluid such as a liquid or a gas or slurry by making the hardness of the inner circumferential surface of the synthetic resin water pipe to be produced higher than the hardness of the outer circumferential surface by spraying cooling air to the inner circumferential surface of the synthetic resin water pipe discharged from the extrusion- And a method of manufacturing an edge deformation-preventing synthetic resin water pipe, an apparatus for producing an extrusion molding of the water pipe, and a method of manufacturing an edge deformation-preventing synthetic resin water pipe.

Another object of the present invention is to provide a method for manufacturing a semiconductor device,

In the case of cutting and removing the expanded end which is first discharged and cooled in the extrusion molding apparatus, the outer surface around the extended end is heated with the heated air before the end of the extended end is cut, the hardness of the outer surface of the extended end is lowered, And a method of manufacturing an edge deformation-preventing synthetic resin water pipe, an apparatus for manufacturing an extrusion molding of the water pipe, and a method of manufacturing an edge deformation-preventing synthetic resin water pipe.

According to an aspect of the present invention, there is provided an apparatus for extrusion-molding a synthetic resin water pipe, comprising: a cylindrical body having a long side in the other direction and a molten resin supply pipe penetrating the upper side of the cylindrical body; An extrusion molding device including a core inserted through the core in the other direction and a resin transfer passage formed between the cylindrical main body and the core and communicating with the molten resin supply pipe to form and discharge the molten resin into a cylindrical pipe on the other side; A through hole penetrating the core in the other direction; The other end of the other projecting portion protruding from the other end of the core is clogged and the other end of the core projecting from the other end of the core is closed, And a cooling air supply pipe around which a plurality of cooling air injection holes are formed so that a hardness of the inner circumferential surface of the tube is made higher than a hardness of the outer circumferential surface by injecting cooling air into the tube discharged from the resin transfer path .

Further, in the "apparatus for extrusion-molding synthetic water pipe" according to the present invention, each of the cooling air injection holes is further equipped with a diffusion nozzle capable of diffusing cooling air in all directions.

The apparatus for producing an extrusion molding apparatus for a synthetic resin water pipe according to the present invention is a device for producing an extrusion molding apparatus for a synthetic resin water pipe according to the present invention which comprises a tube which is disposed at a distance from the other end of the other end of the cooling air tube, And a cooling water chamber for cooling the cooling water.

The apparatus for manufacturing an extrusion-molding machine for a synthetic resin water pipe according to the present invention comprises a cooling water chamber which is spaced apart from the other end of the cooling water chamber so as to be penetrated into the inside thereof, Tube heating means for lowering the hardness around the expanded end; And a cutting means provided at the other side of the tube heating means for cutting and removing the expanded tube portion.

In the method for producing a synthetic resin water pipe using the apparatus of the present invention, cooling air is sprayed on the inner circumferential surface of a water pipe extruded in an extrusion molding apparatus to cool the inner side surface of the water pipe, and the water pipe to be transported again is passed through a cooling chamber filled with cooling water The cut portion is heated and cut at a time of cutting to a predetermined length so that the hardness of the inner circumferential surface of the synthetic resin pipe is made higher than the hardness of the outer circumferential surface to prevent the edge of the cut portion from being deformed .

According to the present invention configured as described above, since the hardness of the inner circumferential surface of the synthetic resin water pipe is made higher than the hardness of the outer circumferential surface, the wear of the inner circumferential surface of the synthetic resin pipe, which is in direct contact with the fluid such as liquid, gas or slurry, There is an effect that it can be extended to the maximum.

The present invention also provides a method of manufacturing a synthetic resin tube, which is capable of preventing cutting edges of a cut portion of a synthetic resin tube from being deformed by heating a cut portion after cutting to a predetermined length, There is also an effect that the cutting defect rate can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an apparatus for producing an extrusion-molding machine for a synthetic resin water pipe according to the present invention. Fig.
2 is an enlarged sectional view of an extrusion molding apparatus and a cooling air supply pipe constituting the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

FIG. 1 is a structural view showing an extrusion molding apparatus for producing a synthetic resin water pipe according to the present invention, and FIG. 2 is an enlarged sectional view of an extrusion molding apparatus and a cooling air supply pipe constituting the present invention.

As shown in the drawing, the apparatus for producing a synthetic resin water pipe according to the present invention comprises a cylindrical body 11 formed to be long in the other direction and having a molten resin supply pipe 111 penetrated on one side thereof, And a core 12 formed between the cylindrical body 11 and the core 12 and communicating with the molten resin supply pipe 111 to supply the molten resin to the other side of the cylindrical pipe And a resin transfer passage 13 for molding and discharging the resin material P into a mold.

The extrusion molding apparatus 1 forms a pipe P by extrusion so that the pipe P is continuously formed and formed in the other direction through the resin transfer passage 13. [ However, the extrusion molding apparatus 1 is well known, and a detailed description thereof will be omitted.

The apparatus for producing an extrusion-molding machine for a synthetic resin water pipe according to the present invention comprises a through-hole (2) penetrating in the other direction in the core (12), and a cooling air supply pipe (3).

The inner diameter of the through hole 2 may be the same as the outer diameter of the cooling air supply pipe 3 so that the cooling air supply pipe 3 can be inserted therethrough, .

1 and 2, the cooling air supply pipe 3 is passed through the through hole 2 and one end of the cooling air supply pipe 3 is connected to the cooling air supply means 31, To the inner circumferential surface thereof.

The cooling air supply pipe 3 having such a function is inserted through the through hole 2 and the other side is protruded from the other end of the core 12 to the other side. The other end of the other projecting portion 32 protruding to the other side from the other end of the core 12 is closed and the other end of the cooling projecting portion 32 is surrounded by cooling air A plurality of cooling air injection holes 321 are formed.

The cooling air supply means 31 supplies cooling air (compressed cooling air) having a pressure through the pump to the cooling air supply pipe 3 by cooling the air to cool the air through the cooling air injection holes 321 And the air is injected. An air tank filled with air or an air conveyance pipe through which air is passed is cooled by a refrigeration system constituted by a cooling cycle of the cooling air supply means 31 to supply cooling air having pressure through the pump to the cooling air supply pipe 3 Since such a cooling air means is already known, a detailed description of its construction and operation will be omitted.

The cooling air is injected into the pipe P discharged from the resin transfer passage 13 through the cooling air injection holes 321 to increase the hardness of the inner circumferential surface of the pipe P to be higher than the hardness of the outer circumferential surface will be. That is, when cooling air is injected into the inner circumferential surface of the unsealed synthetic resin pipe immediately discharged from the horizontal transfer path 13 and rapidly cooled, the inner circumferential surface of the pipe P becomes dense, The hardness of the inner circumferential surface of the pipe P becomes higher than the hardness of the outer circumferential surface.

Further, it is preferable that a diffusion nozzle 322 is further installed in each of the cooling air injection holes 321 so that the cooling air can be diffused in all directions.

1, the apparatus for producing an extrusion-molding synthetic resin water pipe according to the present invention comprises: an outer side of the pipe P disposed at a distance from the other end of the cooling air supply pipe 3, And a cooling water chamber (4) for cooling the pipe (P) to be discharged and moved around.

The cooling water chamber 4 serves to cool the pipe by passing the pipe through the inside of the cooling water circulated to the inside. The cooling water chamber 4 is already known, and a detailed description of the cooling water chamber 4 is omitted .

Hereinafter, the operation of the apparatus for manufacturing a synthetic resin water pipe extrusion molding apparatus according to the present invention will be described.

1 and 2, when a synthetic resin water pipe is manufactured through a synthetic resin water pipe extrusion molding apparatus according to the present invention, first, the extrusion molding apparatus 1 is operated and extruded from a resin feeding passage 13 And at the same time, the cooling air supply means is operated to continuously supply cooling air having pressure to the cooling air supply pipe.

In the process of continuously discharging the pipe P from the resin transfer path 13 as described above, the diffusion of the cooling air supply pipe 3 to the inner circumferential surface of the pipe P, which is discharged from the vertical transfer path 13, By spraying the cooling air from the nozzles 322, the inner peripheral surface of the pipe P is rapidly cooled.

Next, the tube whose inner circumferential surface of the tube is rapidly cooled as described above is transferred to the other side and discharged to the other side through the cooling water chamber (4).

Therefore, when the inner circumferential surface of the pipe P discharged from the vertical transfer path 13 is rapidly cooled in the process of forming and discharging the pipe P as described above, the hardness of the inner circumferential surface of the pipe P becomes larger than the hardness of the outer circumferential surface Is greater than the hardness.

Therefore, according to the present invention, since the hardness of the inner circumferential surface of the synthetic resin tube is made higher than the hardness of the outer circumferential surface, the life of the synthetic resin can be maximized by reducing the wear of the inner circumferential surface of the synthetic resin tube, which is in direct contact with the fluid such as liquid, gas, slurry, It is a useful invention.

On the other hand, as shown in Fig. 1, the end of the pipe P, which is first discharged from the resin transfer passage 13 of the extrusion molding apparatus 1, has a shape in which the pipe is axially guided. That is, the tube to be initially discharged from the resin transfer passage 13 has the end portion P1, which must be removed through cutting.

The apparatus for extrusion molding and forming a synthetic resin tube according to the present invention is provided at the other end of the cooling water chamber 4 so as to be spaced apart from the other end so that the pipe end P1 of the pipe P, (5) for lowering the hardness around the end P1 of the pipe (P) by heating only the periphery of the pipe (P). In addition, the apparatus for extruding and molding a synthetic resin material according to the present invention further includes a cutting means (6) provided at the other side of the tube heating means (5) for cutting and removing the shaft tube portion.

The tube heating means 5 heats the periphery of the axial end P1 of the pipe P by heating only to lower the hardness around the axial end P1 of the pipe P, A heating chamber 51 having a through hole and one end connected to the heating chamber 51 and the other end connected to the heating air supply means 521 and the heating chamber 51 connected to the heating chamber 51 And it is most preferable that the exhaust hole 53 is formed. That is, the tube heating means 5 is operated only once at the beginning each time one long tube is molded.

And a heating blower connected to the heating chamber 51 of the heating air supply unit 521 through heating of a heating wire for discharging the heat by a burner or the like.

The cutting means 6 typically cuts one side of the end P1 of the pipe P while moving in the discharge direction of the pipe P by using a saw, And a detailed description thereof will be omitted.

Therefore, in the present invention, the outer surface around the end portion P1 of the shaft tube P1 is heated with the heated air to lower the hardness of the outer surface of the end portion P1 of the shaft tube before the cutting of the end portion P1 of the shaft tube first discharged in the compression molding apparatus, There is also an advantage that it is possible to prevent a cutting failure in which the periphery of the cut portion is broken at the time of cutting and removing the end portion P1 of the shaft tube in advance.

The present invention also has the effect of preventing deformation of the edge of the cut portion of the synthetic resin tube by cutting the cut portion after heating to a certain length.

The present invention is summarized in more detail as follows. The cooling water is sprayed on the inner circumferential surface of the water pipe of the synthetic resin material extruded in the extrusion molding apparatus to cool the inner surface, and the synthetic resin pipe to be transported again is passed through a cooling chamber filled with cooling water, It is possible to prevent the deformation of the edge of the cut portion by making the hardness of the inner circumferential surface of the synthetic resin tube higher than the hardness of the outer circumferential surface by heating the cut portion at the time of cutting.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the invention defined by the limitations of the following claims.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

1: extrusion molding apparatus 2: through hole
3: cooling air supply pipe 4: cooling water chamber
5: tube heating means 6: cutting means
11: Cylindrical body 12: Core
13: Horizontal conveyance passage
31: cooling air supply means 32:
111: molten resin supply pipe
321: cooling air injection hole 322: diffusion nozzle
521: Heating air supply means 53: Exhaust hole

Claims (7)

And a molten resin supply pipe which is formed between the cylindrical main body and the core and which is inserted into one end of the cylindrical main body and inserted into the other side of the cylindrical main body, An extrusion molding device including a resin transfer passage communicating with the molten resin to form and discharge the molten resin into a cylindrical tube on the other side;
A through hole penetrating the core in the other direction;
The other end of the other projecting portion protruding from the other end of the core is clogged and the other end of the core projecting from the other end of the core is closed, A cooling air supply pipe around which a plurality of cooling air injection holes are formed so that hardness of the inner circumferential surface of the tube can be made higher than hardness of the outer circumferential surface by injecting cooling air into the tube discharged from the resin transfer path;
Wherein the waterproofing member is made of synthetic resin.
The method according to claim 1,
Wherein each of the cooling air injection holes is further equipped with a diffusion nozzle capable of spraying the cooling air in four directions.
3. The method according to claim 1 or 2,
The extrusion molding apparatus
A cooling water chamber disposed at a distance from the other end of the other end of the cooling air supply pipe to cool the pipe to be discharged and moved around the outside of the pipe to be discharged and moved;
Further comprising: an extrusion-molding unit for extrusion-molding the edge deformation-preventing synthetic resin water pipe.
The method of claim 3,
The extrusion molding apparatus
A tube heating means disposed at the other end of the cooling water chamber so as to be spaced apart from the other end so as to penetrate the tube and to heat only the circumference of the extended end of the pipe to be passed therethrough to lower the hardness around the expanded end of the tube;
A cutting means provided on the other side of the tube heating means for cutting and removing the enlarged tube portion;
Further comprising: an extrusion molding apparatus for manufacturing an edge deformation preventing synthetic resin water pipe.
5. The method of claim 4,
Wherein the tube heating means comprises:
A heating chamber in which a through hole through which a pipe passes is formed on both sides,
One end thereof is inserted through the heating chamber and the other end thereof is connected to the heating air supply means,
An exhaust hole formed in the upper portion of the heating chamber,
Wherein the waterproofing member is made of synthetic resin.
A method of manufacturing a synthetic resin pipe,
Cooling air is injected into the inner circumferential surface of the synthetic resin pipe extruded in the extrusion molding apparatus to cool the inner side surface, and the synthetic resin pipe to be transported again is cooled by passing through a cooling chamber filled with cooling water. And the hardness of the inner circumferential surface of the synthetic resin tube is made higher than the hardness of the outer circumferential surface to prevent deformation of the edge of the cut portion.
An edge deformation-preventing synthetic resin water pipe produced by the manufacturing method of claim 6.
KR1020170000730A 2017-01-03 2017-01-03 synthetic resin water pipe prevented from edge transformation, manufacturing device for its extrusion and manufacturing method thereof KR20180079948A (en)

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KR1020170000730A KR20180079948A (en) 2017-01-03 2017-01-03 synthetic resin water pipe prevented from edge transformation, manufacturing device for its extrusion and manufacturing method thereof

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Application Number Priority Date Filing Date Title
KR1020170000730A KR20180079948A (en) 2017-01-03 2017-01-03 synthetic resin water pipe prevented from edge transformation, manufacturing device for its extrusion and manufacturing method thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210074680A (en) * 2019-12-12 2021-06-22 박순세 Manufacturing apparatus of synthetic resin pipe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040078874A (en) * 2003-03-04 2004-09-13 후지 샤신 필름 가부시기가이샤 Method of producing a clad pipe for plastic optical fiber and device of producing thereof and clad pipe, plastic optical fiber
KR100453611B1 (en) * 1996-04-17 2005-01-31 우포너 이노베이션 에이 비 Cooling method and apparatus for extrusion molded hollow article
KR200394647Y1 (en) * 2005-06-22 2005-09-02 대림산업 주식회사 Internal cooling device for producing multi-hole pipe
KR20140072638A (en) * 2012-12-05 2014-06-13 주식회사 사이몬 Method of cutting a plastic pipe
JP2016106043A (en) * 2013-04-01 2016-06-16 テルモ株式会社 Method for producing tube, and production device therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100453611B1 (en) * 1996-04-17 2005-01-31 우포너 이노베이션 에이 비 Cooling method and apparatus for extrusion molded hollow article
KR20040078874A (en) * 2003-03-04 2004-09-13 후지 샤신 필름 가부시기가이샤 Method of producing a clad pipe for plastic optical fiber and device of producing thereof and clad pipe, plastic optical fiber
KR200394647Y1 (en) * 2005-06-22 2005-09-02 대림산업 주식회사 Internal cooling device for producing multi-hole pipe
KR20140072638A (en) * 2012-12-05 2014-06-13 주식회사 사이몬 Method of cutting a plastic pipe
JP2016106043A (en) * 2013-04-01 2016-06-16 テルモ株式会社 Method for producing tube, and production device therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210074680A (en) * 2019-12-12 2021-06-22 박순세 Manufacturing apparatus of synthetic resin pipe

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