KR101480027B1 - Plastic curve-pipe manufacture device - Google Patents

Plastic curve-pipe manufacture device Download PDF

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Publication number
KR101480027B1
KR101480027B1 KR1020140028643A KR20140028643A KR101480027B1 KR 101480027 B1 KR101480027 B1 KR 101480027B1 KR 1020140028643 A KR1020140028643 A KR 1020140028643A KR 20140028643 A KR20140028643 A KR 20140028643A KR 101480027 B1 KR101480027 B1 KR 101480027B1
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KR
South Korea
Prior art keywords
liquid
resin
molding space
mold
injection liquid
Prior art date
Application number
KR1020140028643A
Other languages
Korean (ko)
Inventor
추성화
최정기
Original Assignee
한일튜브 주식회사
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Publication date
Application filed by 한일튜브 주식회사 filed Critical 한일튜브 주식회사
Priority to KR1020140028643A priority Critical patent/KR101480027B1/en
Application granted granted Critical
Publication of KR101480027B1 publication Critical patent/KR101480027B1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/1703Introducing an auxiliary fluid into the mould
    • B29C45/1704Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/18Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00Producing tubular articles
    • B29D23/001Pipes; Pipe joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/1703Introducing an auxiliary fluid into the mould
    • B29C45/1704Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C2045/1719Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles making tubular articles

Abstract

The present invention relates to a resin bending apparatus, which comprises a mold having a molding space along a locus of a resin bending pipe to be manufactured and having an inlet port for filling an injection liquid into a molding space, And a water injecting portion for injecting a liquid into the injection liquid in a gel state to manufacture a resin bending tube having a hollow portion along the trajectory of the molding space.
Unlike the prior art, unlike the prior art, it is possible to easily manufacture a resin bending tube by injecting liquid into a gel-like injection liquid in a mold, and moving an inner diameter-formed ball member along a resin bending path, And it is possible to reduce the roughness of the inner surface of the manufactured resin bend.

Description

{PLASTIC CURVE-PIPE MANUFACTURE DEVICE}

The present invention relates to a resin bending apparatus, and more particularly, to a resin bending apparatus capable of easily forming a resin bending pipe by spraying a liquid onto a gel-like injection liquid in a mold and moving the inner- The present invention relates to a resin bending apparatus and a resin bending apparatus which can prevent the inner surface of a resin bending tube from being broken due to liquid injection and reduce the roughness of the inner surface of the resin bending tube.

In the case of fuel piping for automobiles, steel pipes and rubber hoses are conventionally used. However, in recent years, plastic pipes made of plastic have been widely used as substitutes for conventional steel pipes and rubber hoses in Korea, Europe and North America.

The reason why plastic tubes are used in this way is that plastic tubes have flexibility and rigidity so that they can replace the rigidity of steel and the flexibility of hose and the use of conductive plastic The use of barrier layers such as PVDF (Polyvinylidene Fluoride), ETFE (Ethylene Tetrafluoro Ethylene), and PBN (Polybutylene Naphthalate) in the middle layer can reduce fuel transmission, Emission Vehicle) and ZEV (Zero Emission Vehicle).

Since the plastic tube, which is widely used as a piping material for automobiles in recent years, can not be used straight as a tube, it is used after bending to a desired shape through a separate bending process. The conventional bending method .

First, a straight tube cut into a predetermined length is forcedly inserted into a bending jig and inserted, and then a plurality of release bays are fitted from above to complete the mounting. Here, the bending jig is made of a metal material, and various parts are bent into a predetermined shape so as to obtain a final bending shape of the tube.

As described above, the bending jig for plastic tube bending needs to have a large bending radius in order to prevent the occurrence of dents or folds in the bending part of the plastic tube, so that the size of the plastic tube becomes large and interference with other parts There is a problem that arises. Therefore, there is a need to improve this.

The bending of a plastic tube is proposed in Korean Patent Laid-Open Publication No. 10-1996-7002381 (entitled "Bending tube and its manufacturing method and apparatus").

Disclosure of the Invention The present invention has been conceived to solve the problems as described above, and provides a resin bending apparatus for manufacturing a resin bending tube by spraying a liquid onto a gel-like injection liquid in a mold to prevent dents and deformation of the tube due to bending of the tube. It has its purpose.

In addition, since the mold can be prevented from being deformed due to separate bending due to the manufacture of a mold in a state in which the resin bending tube is bent, the thickness can be reduced and the fixing bracket can be integrally manufactured in the resin bending tube. And to reduce the weight of the resin bending machine.

In addition, the present invention can prevent the inner surface breakage of the resin bushing due to the injection of the high-pressure liquid by moving the inner-diameter-formed ball member along the bending path of the resin bushing, and to reduce the roughness of the inner surface of the resin bending tube The purpose is to provide.

A resin bending apparatus according to the present invention includes: a mold having a molding space along a locus of a resin bend to be manufactured, and having an inlet port for filling an injection liquid into the molding space; And a water injecting unit connected to the molding space and injecting a liquid to the injection liquid in a gel state during the curing process to manufacture the resin bending pipe having a hollow portion along the locus of the molding space.

The hollow portion may be formed by an inner diameter formed ball member that moves along the inside of the injection liquid by the liquid to be injected.

Wherein the inner diameter formed ball member comprises: a resistance reducing portion formed on the front side to reduce a moving resistance in the injection liquid; And a receiving space portion formed inside to be opened to the rear side of the resistance reducing portion and accommodating liquid to be injected for generation of a driving force.

The resistance reducing section may extend a supporting member for setting the diameter of the resin bending pipe to the rear side.

The water ejecting portion includes an injection nozzle for initially inserting and positioning the inner-diameter-formed ball member.

As described above, the resin bending apparatus according to the present invention can prevent dents and deformation due to bending of the tube by forming a resin bending pipe by injecting a liquid into the injection liquid, which is in a gel state, in the mold, unlike the prior art.

In addition, since the mold can be prevented from being deformed due to separate bending due to the manufacture of a mold in a state in which the resin bending tube is bent, the thickness can be reduced and the fixing bracket can be integrally manufactured in the resin bending tube. It can be made easy, and the weight can be reduced.

In addition, according to the present invention, by moving the inner diameter-formed ball member along the resin bushing trajectory, it is possible to prevent the breakage of the inner surface of the resin bushing due to the injection of the high-pressure liquid, and the roughness of the inner surface of the resin bushing can be reduced.

1 is a perspective view of a resin bending apparatus according to an embodiment of the present invention.
2 is an exploded perspective view of a resin bending apparatus according to an embodiment of the present invention.
3 is a mold top view of a resin bending apparatus according to an embodiment of the present invention.
FIG. 4 is a plan view showing a state in which a resin bend is manufactured using a metal mold according to an embodiment of the present invention.
5 to 8 are various embodiments of an inner diameter formed ball member for manufacturing a resin bend according to the present invention.
9 is a perspective view of a resin bush according to an embodiment of the present invention.

Hereinafter, an embodiment of a resin bending apparatus according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view of a resin bending apparatus according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a resin bending apparatus according to an embodiment of the present invention.

FIG. 3 is a plan view of a mold of a resin bending apparatus according to an embodiment of the present invention, and FIG. 4 is a plan view showing a state where a resin bending tube is manufactured using a mold according to an embodiment of the present invention.

5 to 8 are various embodiments of an inner diameter formed ball member for manufacturing a resin bend according to the present invention.

9 is a perspective view of a resin bush according to an embodiment of the present invention.

1 to 5 and 9, a resin bending apparatus according to an embodiment of the present invention includes a mold 100 and a water injecting unit 200.

The mold 100 is provided for manufacturing the mold 100 with the resin bending tube 10. At this time, the resin bending tube 10 is made of a resin material, which is less in weight than the metal bending tube, is inexpensive, and does not generate rust. Since the resin bending tube 10 is manufactured as the metal mold 100, a bracket (not shown) for fixing can be integrally formed, so that the welding defect itself does not occur as compared with the metal bending tube for welding the bracket.

Further, the resin bending tube 10 may have a straight shape or a curved shape. That is, the resin bending tube 10 can be applied in various shapes.

In particular, the mold 100 has a molding space 130 along the locus of the resin bend 10 to be manufactured. In other words, the mold 100 is divided into the upper mold 1100 and the lower mold 120, and the upper mold 1100 and the lower mold 120 are formed with the molding spaces 130 that coincide with each other.

The mold 100 is provided with an inlet port 140 to fill the molding space 130 formed by the overlapping of the upper mold 1100 and the lower mold 120. In particular, The inlet port 140 is formed in the upper mold 1100 or the lower mold 120. The inlet port 140 may have a hole shape.

The water injecting part 200 plays a role of manufacturing the resin bending tube 10 having the hollow part 12 by injecting the liquid 202 at a high pressure into the molding space 130 filled with the injection liquid 102 do. At this time, the edge portion of the injection liquid 102 contacting the mold 100 is hardened faster than the center side portion.

Thus, when the edge of the injection liquid 102 is hardened to a predetermined degree and the center side of the injection liquid 102 is in a gel state, the water injecting portion 200 injects the liquid 202 at a high pressure. Thereby, only the injection liquid 102 in the gel state is discharged to the outside of the mold 100, and the resin bending tube 10 having the hollow portion 12 is manufactured. At this time, the resin bending tube 10 is formed along the locus of the molding space 130.

On the other hand, when the resin bending tube 10 is bent and the liquid 202 is injected at a high pressure and the hollow portion 12 of the resin bending tube 10 is molded, The high pressure injection of the liquid 202 is not smooth, and holes can be formed on the circumferential surface of the curved portion.

Accordingly, the hollow portion 12 is formed by the inner diameter-formed ball member 300 which is moved along the inside of the injection liquid 102 by the liquid 202 to be injected.

In other words, the liquid 202 strongly pushes the inner diameter formed ball member 300, and the inner diameter formed ball member 300 receives the driving force by the liquid 202, .

At this time, the diameter of the mold 100 on the discharge side of the injection liquid 102 is smaller than the diameter of the molding space 130. This is to maximize the smoothness of the surface of the hollow portion 12 to be formed by reducing the conveying speed in the forming space 130 by the inner diameter formed ball member 300 conveyed by the liquid 202 to be injected. The inner diameter formed ball member 300 is prevented from being discharged to the outside of the mold 100 due to reduction of the diameter of the mold 100 on the discharge side of the injection liquid 102. Therefore, the operator can prevent a safety accident caused by the discharge of the inner diameter formed ball member 300.

At this time, the strength of the manufactured resin bending tube 10 is strengthened by pressing the injection liquid 102, which is hardened in contact with the mold 100, in the inside of the molding space 130. As a result, the thickness of the resin bending pipe 10 can be reduced. As a result, the weight of the resin bending tube 10 is further reduced.

On the other hand, the inner diameter formed ball member 300 includes the resistance reducing portion 310 and the accommodation space portion 320.

The resistance reducing portion 310 is formed on the front side of the inner diameter formed ball member 300 in order to reduce the resistance when moving the injection liquid 102 in the gel state by the liquid 202 to be injected. In particular, the resistance reducing portion 310 is preferably formed of a wire or a curved surface to reduce the resistance. Furthermore, the resistance reducing portion 310 is in the shape of a cone having an end curved.

The accommodation space 320 is formed in the interior of the resistance reduction part 310 and is opened to the rear side of the resistance reduction part 310. Thus, the accommodation space portion 320 serves to receive the liquid 202 to be injected for generating the driving force of the inner-diameter-formed ball member 300. That is, as the liquid 202 to be injected is gathered in the accommodation space 320, the inner diameter-formed ball member 300 is more strongly driven.

Further, the resistance reducing section 310 extends the support member 330 to the rear side. The support member 330 has a tubular shape and extends from the rear edge of the resistance reducing portion 310. The support member 330 is formed to have a diameter smaller than a diameter of the molding space 130 formed by the upper mold 1100 and the lower mold 120. The diameter of the molding space 130 and the diameter of the support member 330 The diameter difference is equal to the thickness of the resin bending tube 10 to be manufactured. At this time, as the support member 330 passes the inside of the injection liquid 102 and pressurizes the injection liquid 102 in the radial direction, The support member 330 is fabricated integrally with the resistance reducing portion 310. [

The center of the inner diameter formed ball member 300 with respect to the axial direction should be set to a position corresponding to the center axis of the molding space 130 formed by the upper mold 1100 and the lower mold 120. The water injecting portion 200 is provided with an injection nozzle 210 for initially positioning and positioning the inner diameter formed ball member 300. The injection nozzle 210 is formed to be capable of receiving the inner diameter- The water injecting portion 200 is inserted into the space portion 320 so that the injection nozzle 210 inserted into the inner diameter formed ball member 300 is located at the center of the initial position of the molding space 130. [ Fixed to the fixture or the mold 100.

Particularly, as the inner-diameter-formed ball member 300 passes the inside of the injection liquid 102, both side edges of the resin-made bending tube 10 are smaller in diameter than the set diameter, Respectively. Thus, both side edges of the resin bending tube 10 form the cut portion 14 to be removed.

Figs. 6-8 illustrate the inner shape ball member 300 of various shapes. The inner diameter formed ball member 300 may be manufactured in various other ways.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the true scope of the present invention should be determined by the following claims.

10: Resin bend 100: Mold
110: upper mold 120: lower mold
130: molding space 200: water injecting part
210: Injection nozzle 300: Inner diameter formed ball member
310: resistance reducing section 320: accommodation space section
330: Support member

Claims (5)

  1. A mold having a molding space along a locus of a resin bending pipe to be manufactured and having an inlet port for filling an injection liquid into the molding space; And
    And a water injecting unit connected to the molding space and spraying a liquid to an injection liquid in a gel state during a curing process to manufacture the resin bending pipe having a hollow portion along the locus of the molding space,
    Wherein the hollow portion is formed by an inner diameter formed ball member which moves along the inside of the injection liquid by the liquid to be injected,
    Wherein the diameter of the mold on the injection liquid discharge side is smaller than the diameter of the molding space in order to reduce the transfer speed of the inner diameter formed ball member.
  2. delete
  3. The ball bearing according to claim 1,
    A resistance reducing portion formed on the front side to reduce the moving resistance in the injection liquid; And
    And an accommodating space part formed in the inside so as to be opened to the rear side of the resistance reducing part and accommodating the liquid to be injected for generating the driving force.
  4. The method of claim 3,
    Wherein the resistance reducing section extends a support member for setting the diameter of the resin bend to the rear side.
  5. The method according to claim 1,
    Wherein the water ejecting portion includes an injection nozzle for initially positioning and positioning the inner-diameter-formed ball member.
KR1020140028643A 2014-03-11 2014-03-11 Plastic curve-pipe manufacture device KR101480027B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140028643A KR101480027B1 (en) 2014-03-11 2014-03-11 Plastic curve-pipe manufacture device

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Application Number Priority Date Filing Date Title
KR1020140028643A KR101480027B1 (en) 2014-03-11 2014-03-11 Plastic curve-pipe manufacture device

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KR101480027B1 true KR101480027B1 (en) 2015-01-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101760086B1 (en) * 2015-05-11 2017-07-21 한일튜브(주) Plastic cover of protecting a part of automobile

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10180812A (en) * 1996-12-26 1998-07-07 Asahi Chem Ind Co Ltd Method for molding hollow body with floating core
KR20110118614A (en) * 2009-01-30 2011-10-31 알피 토플라 리미티드 Method of manufacturing pipe with branch
KR20120016606A (en) * 2009-04-10 2012-02-24 알피 토플라 리미티드 Hollow body manufacturing method
JP2012131136A (en) * 2010-12-22 2012-07-12 Rp Topla Ltd Hollow body molding device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10180812A (en) * 1996-12-26 1998-07-07 Asahi Chem Ind Co Ltd Method for molding hollow body with floating core
KR20110118614A (en) * 2009-01-30 2011-10-31 알피 토플라 리미티드 Method of manufacturing pipe with branch
KR20120016606A (en) * 2009-04-10 2012-02-24 알피 토플라 리미티드 Hollow body manufacturing method
JP2012131136A (en) * 2010-12-22 2012-07-12 Rp Topla Ltd Hollow body molding device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101760086B1 (en) * 2015-05-11 2017-07-21 한일튜브(주) Plastic cover of protecting a part of automobile

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