KR850001949B1 - An apparatus and method for molding connection parts of plastic tubes - Google Patents

An apparatus and method for molding connection parts of plastic tubes Download PDF

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Publication number
KR850001949B1
KR850001949B1 KR1019830005917A KR830005917A KR850001949B1 KR 850001949 B1 KR850001949 B1 KR 850001949B1 KR 1019830005917 A KR1019830005917 A KR 1019830005917A KR 830005917 A KR830005917 A KR 830005917A KR 850001949 B1 KR850001949 B1 KR 850001949B1
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South Korea
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packing
groove
mandrel
tube
forming
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KR1019830005917A
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Korean (ko)
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KR850004419A (en
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강훈구
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주식회사 럭키
구자학
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    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

This method expands a part of a part of a plastic tube by softening to form a groove. A part of the softened plastic tube is inserted into a mandrel(3). A depressed groove(5), to support the packing(1), is formed on a moving body(3') of a mandrel(3). The round shaped packing(1) and an upholding tube(6) are inserted into the groove. A depressed groove(11) is formed on the packing part(1) by covering the softened plastic tube(8). In an apparatus for connection parts an outside diameter of mandrel(3) is shorter than a moving body diameter of it.

Description

합성수지관의 연결부 성형방법 및 장치Method and apparatus for forming connection part of synthetic resin pipe

제1도는 패킹을 지지금형으로 이송하는 상태를 보인 개략도.1 is a schematic view showing a state in which the packing is transferred to the support type.

제2도는 성형 만드렐에 패킹을 삽입하는 상태를 보인 개략도.2 is a schematic view showing a state in which a packing is inserted into a molding manrel.

제3도는 성형 만드렐에 연화된 합성수지관의 단부를 끼운 상태의 단면도.3 is a cross-sectional view of the end portion of the synthetic resin tube softened to the molding manel.

제4도는 제3도의 상태에서 지지대를 발취하는 상태를 보인 단면도.4 is a cross-sectional view showing a state in which the support is taken out in the state of FIG.

제5도는 지지대가 완전히 빼진 상태를 보인 단면도.5 is a cross-sectional view showing a state that the support is completely removed.

제6도는 만드렐에서 합성수지관의 발취하는 상태를 보인 단면도.6 is a cross-sectional view showing the extraction state of the synthetic resin pipe in the mandrel.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 패킹 3 : 성형만드렐1: packing 3: molding mandrel

3' : 만드렐동체부 3'' : 만드렐 외단부3 ': Mandrerel fuselage 3' ': Mandrerel outer end

5 : 패킹 지지요홈 6 : 지지관5: packing support groove 6: support tube

7 : 관체 지지돌륜7: tube support wheel

본 발명은 합성수지관의 연결부를 성형 하는데 관한 것으로서, 더 상세히 설명하면 합성수지관의 연결부에 패킹감삽 요홈을 형성함과 동시에 요홈내에 패킹이 감삽되어 밀착 고정되도록하는 합성수지관의 연결부 성형방법과 이에 이용되는 장치게 관한 것이다.The present invention relates to forming a connection part of a synthetic resin pipe, and in more detail, a method of forming a connection part of a synthetic resin pipe to form a packing-subtraction groove in a connection part of a synthetic resin pipe and to fix and fix the packing in the groove. It's about the device.

합성수지관의 연결부를 성형하는 종래의 방법은 연결한 관의 단부를 연화시키고 성형 만드렐에 씌운다음 공기압 또는 기계적인 방법으로 연결한 관의 단부가 삽입될 부분과 동시에 패킹이 삽입될 부분을 팽창시켜 요홈을 형성하고 별도로 제작된 패킹을 요홈내에 삽입하는 방법을 이용하여왔는바, 이와 같은 종래의 방법은 패킹삽입용 요홈 형성에 사용되는 금형의 외주가 패킹의 외주와 일치되게 형성한다해도 성형시의 공기압 또는 기계적인 압력에 따라 제조되는 패킹삽입용 요홈이 패킹의 외주에 완전히 일치되지 않으므로 완전한 밀착효과를 얻을 수 없어서 사실상 수밀효과가 불완전하게 되는 경우가 있었다.Conventional methods of molding the joints of a synthetic resin pipe are made by softening the ends of the pipes to be connected, covering them with molding molds, and inflating the parts into which the packings are to be inserted at the same time as the ends of the pipes connected by pneumatic or mechanical methods. Forming the grooves and inserting the separately produced packing in the grooves has been used, this conventional method, even when the outer periphery of the mold used to form the grooves for inserting the packing is formed to match the outer periphery of the packing Packing insert grooves manufactured according to air pressure or mechanical pressure are not completely matched to the outer periphery of the packing, and thus a perfect sealing effect cannot be obtained, and thus the watertight effect is incomplete.

본 발명은 전술한 관연결부 성형방법상의 결점을 개선하기 위하여 연결부에 형성되는 패킹 삽입요홈이 패킹과 동일한 내주면을 갖도록하므로서 요홈내에 패킹이 밀착되어 완전한 수밀효과를 얻을 수 있도록 한 것이다.The present invention is to ensure that the packing insertion groove formed in the connection portion has the same inner circumferential surface as the packing in order to improve the above-mentioned defects in the pipe forming part forming method, so that the packing is in close contact with the groove to obtain a full watertight effect.

본 발명은 전술한 수밀효과를 얻기 위하여 패킹을 관연결부 성형 만드렐에 씌우고 그위에 연화된 합성수지관을 삽입하여 연화된 합성수지관의 패킹위에 씌워지게한 다음 냉각하므로서 수축시 패킹부분에 패킹이 삽입된 요홈이 형성되도록하므로서 요홈내주면에 패킹의 외주면이 밀착되어 완전한 수밀효과를 나타내도록한 것으로서, 이하 본 발명의 방법과 그에 이용되는 장치를 도면에 의하여 상세히 설명하면 다음과 같다.In order to achieve the above-mentioned watertight effect, the packing is covered with a molded part made of pipe joints, and a soft synthetic resin tube is inserted thereon to cover the packing of the softened synthetic resin tube, followed by cooling, and then the packing is inserted into the packing portion during shrinkage. As the groove is formed, the outer circumferential surface of the packing is in close contact with the inner circumferential surface of the packing so as to exhibit a complete watertight effect. Hereinafter, the method and the apparatus used therein will be described in detail with reference to the accompanying drawings.

제1도는 패킹 공급장치에 대한 것인바, 패킹(1)은 봉상지지체(2)에 끼워져 있어서 패킹 이송기(4)로 하나씩 빼내어 성형만드렐(3)의 외주에 끼우게 되었다.1 is for the packing feeder, the packing 1 is fitted to the rod-shaped support 2 so that the packing 1 is pulled out by the packing feeder 4 one by one to the outer periphery of the molding mandrel 3.

성형 만드렐(3)은 외단부(3'')의 직경은 좁고 내측의 동체부(3')는 외단부직경보다 파이프 두께만큼 더 직경이 크게되어 있으며 동체부(3')에는 패킹 지지요홈(5)이 형성되어 있어서 패킹 이송기(4)로 이송되어 온 패킹(1)의 내주연부가 삽입 지지되게 되었다.Molding mandrel 3 has a narrow outer end 3 '' diameter and an inner fuselage 3 'that is larger in diameter than the outer end diameter by a pipe thickness and a packing support groove in the fuselage 3'. (5) was formed so that the inner periphery of the packing 1, which was transferred to the packing conveyer 4, was inserted and supported.

이 요홈(5) 후방의 만드렐 동체부(3')에는 돌륜(7)을 갖는 지지관(6)이 씌워져 있는바, 이 지지관(6)의 선단은 요홈(5)의 후방연부와 직선상에 위치하여 패킹(1)을 끼울때 또는 만드렐(3)으로 관체(8)을 끼울때 패킹(1)이 요홈(5)의 후방으로 밀려나는 것을 방지하도록 되었다. 그리고 지지관(6)에 형성된 돌륜(7)은 관체(8)을 끼울때 스토퍼의 역할을 하여 관체(8)이 더 이상 삽입되는 것을 막고 패킹(1)이 관체단부로부터 일정한 거리에 유지되도록 한다. 지지관(6)은 만드렐에서 전후진되도록 되었는바, 지지관(6)이 전진하였을때는 그 선단이 요홈(5)의 후연부에 일치되게 위치하고 후진하였을 때는 그 선단이 최소한 선단과 돌륜(7)간의 거리이상으로 후퇴되도록 하여야 한다.The mandrel body part 3 'behind the groove 5 is covered with a support tube 6 having a wheel wheel 7. The tip of the support tube 6 is straight with the rear edge of the groove 5; It was arranged to prevent the packing 1 from being pushed to the rear of the groove 5 when fitting the packing 1 or when fitting the tube 8 into the mandrel 3. And the wheel wheel 7 formed in the support tube 6 serves as a stopper when fitting the tube 8 to prevent the tube 8 from being inserted anymore and to ensure that the packing 1 is kept at a constant distance from the tube end. . The support tube 6 is moved forward and backward in the mandrel. When the support tube 6 moves forward, its tip is positioned in line with the trailing edge of the groove 5, and when it is retracted, the tip is at least the tip and the wheels (7). Retreat over the distance between

그리고 만드렐(3)의 외측에는 냉각기(9)가 장설되어 있는바, 이 냉각기는 노즐(10)으로 냉각수를 분무하여 성형작업후 연화된 파이프의 단부를 냉각 경화시키는 역할을 한다. 이 냉각기는 냉각수 분무식 이외의 다른 냉각방식을 이용하는 냉각기로 대치사용할 수 있다.And a cooler (9) is installed on the outside of the mandrel (3), this cooler sprays the cooling water with the nozzle (10) serves to cool and harden the end of the softened pipe after the molding operation. This cooler can be used as a cooler using a cooling method other than cooling water spray.

이하 전술한 본 발명의 장치를 이용하는 본 발명의 성형방법을 도면에 의하여 설명하면 다음과 같다.Hereinafter, the molding method of the present invention using the apparatus of the present invention described above with reference to the drawings.

성형 만드렐(3)에 지지관(6)을 그 선단이 요홈(5)의 후연부에 이르도록 삽입하고 패킹 이송기(4)로 원통형 패킹지지체(2)에서 빼낸패킹(1)을 만드렐(3)에 삽입하여 만드렐(3)의 요홈(5)에 고정시킨 다음 패킹 이송장치(4)를 제거한다.Insert the support tube 6 into the forming mandrel 3 so that its tip reaches the trailing edge of the groove 5 and make the packing 1 taken out of the cylindrical packing support 2 with the packing conveyer 4. (3) and fix it to the groove (5) of the makerel (3) and then remove the packing feeder (4).

패킹(1)이 삽입 고정된 만드렐(3)에 파이프(8)의 연화된 단부를 씌워서 끼우면 연화된 파이프(8)의 단부는 파이프(8)의 내경보다 약간 큰 직경의 외단부(3'')을 지나 동체부(3')로 씌워질때 넓어지게되는 바, 동체부(3')에서는 동체부와 외단부(3'')의 직경차에 의하여 파이프의 전주면에 걸쳐 파이프두께만큼 넓어지고 그 결과 그속으로 연결한 파이프의 단부가 삽입될 수 있도록 되었다.When the packing 1 is inserted and fitted with the softened end of the pipe 8 in the mandrel 3 to which the packing 1 is inserted, the end of the softened pipe 8 is 3 'in diameter with a diameter slightly larger than the inner diameter of the pipe 8. It is widened when it is covered by the fuselage part 3 'after passing through'), and in the fuselage part 3 ', it is widened by the pipe thickness over the entire circumference of the pipe by the diameter difference between the fuselage part and the outer end part 3' '. As a result, the ends of the pipes connected therein can be inserted.

만드렐(3)의 동체부(3')로 끼워지는 연화된 관체의 단부는 동체부(3')에 씌워질때 패킹(1)의 외주만큼 더 넓어지고 패킹(1)을 지나면 연화된 파이프 자체가 갖는 수축력에 의하여 지지관(6)에 씌워지게 된다. 이 상태에서 지지관(6)을 후퇴시키면 연화된 파이프의 단부는 패킹부분에는 패킹(1)이 삽입된 요홈(11)형태로 되면서 요홈(11) 외측의 연화된 단부는 더 수축되어 마드렐(3)의 동체부(3')에 밀착되게 되므로 이때 냉각기(9)로 냉각수를 분무하여 연화된 관체의 단부를 냉각 경화시키고 파이프를 만드렐(3)으로부터 빼내면 요홈(11)내에 패킹(1)이 밀착된 연결부가 성형되는 것이다.The end of the softened tubular body fitted into the fuselage part 3 'of the mandrel 3 is wider by the outer periphery of the packing 1 when it is covered by the fuselage part 3' and the softened pipe itself after the packing 1 has passed. It is covered by the support tube 6 by the contracting force that it has. When the support tube 6 is retracted in this state, the end of the softened pipe becomes a recess 11 in which the packing 1 is inserted into the packing portion, and the softened end outside the recess 11 is further contracted to make the madrel ( 3), it is in close contact with the fuselage part 3 '. At this time, by spraying the coolant with the cooler 9, the end of the softened tube is cooled and cured, and the pipe is removed from the mandrel 3 and the packing 1 is formed in the groove 11. ) Close contact is molded.

이와 같은 본 발명에 의하면 연화된 파이프의 연결한 단부를 패킹(1)이 지지된 만드렐(3)에 끼워 성형하므로 관체에 형성되는 요홈(11)이 패킹(1)의 외주에 밀착된 상태로 되게되어 패킹(1)과 요홈(11)의 내주면 사이에서 누수되는 것을 방지할 수 있고, 지지관(6)의 단부와 만드렐 동체부(3')에 형성된 요홈(5)의 후단연부를 일치시키고 지지관(6)의 돌륜(7)을 지지관 단부로부터 일정한 거리에 형성하였으므로 연화된 합성수지관의 단부를 삽입할 때 패킹(1)이 밀리지 않게 됨은 물론이며 지지관(6)에 형성되는 패킹감삽 요홈(11)의 위치가 일정하게 되어 다른 합성수지관의 연결작업이 간편하게 되는 것이다.According to the present invention, the connecting end of the softened pipe is molded into the moldel 3 supported by the packing 1 so that the groove 11 formed in the tubular body is in close contact with the outer circumference of the packing 1. To prevent leakage between the packing 1 and the inner circumferential surface of the groove 11, and coincide with the end of the support tube 6 and the rear end of the groove 5 formed in the mandrel body part 3 '. And the protrusions 7 of the support tube 6 are formed at a predetermined distance from the end of the support tube, so that the packing 1 is not pushed when the end of the softened synthetic resin tube is inserted, as well as the packing formed in the support tube 6. The position of the subtractive groove 11 is made constant so that the connection work of the other synthetic resin pipe becomes simple.

더구나 만드렐(3)에 형성된 요홈(5)는 그 저면에 의하여 형성되는 외경이 만드렐 동체부(3')의 외경보다 좁으므로 그에 지지된 패킹(1)은 성형 완료후 팽경된 연결부의 내경보다 좁게 되고 그 결과 그 내주면의 일부가 연결부 내측으로 약간 돌출된 상태로되어 다른 관체의 단부를 삽입하였을 때 돌출된 패킹(1)의 내주면부가 압압되어 수밀 작용을 하게 되는 것이다.Moreover, the groove 5 formed in the mandrel 3 has an outer diameter formed by the bottom thereof being narrower than the outer diameter of the mandrel fuselage portion 3 ', so that the packing 1 supported thereon has an inner diameter of the inflated connection part after molding is completed. As a result, the inner circumferential surface portion of the protruding packing 1 is pressed to perform a watertight action when a portion of the inner circumferential surface is slightly protruded into the connecting portion and the end of the other tube is inserted.

Claims (2)

합성수지관의 단부를 연화하여 확대 시키고 패킹 감삽 요홈을 형성하는 연결부 성형방법에 있어서, 연화된 합성수지관의 단부가 삽입되는 만드렐(3)에 요홈(5)을 형성하여 요홈내에 원륜상 패킹(1)을 끼우고 돌조(7)을 갖는 지지관(6)을 삽입하여 패킹이 뒤로 밀리지 않도록 고정시킨 후 합성수지관(8)의 연화된 단부를 씌워서 패킹(1)의 부위에 요홈(11)이 형성되게한 후 지지관(6)을 빼고 냉각하여 패킹이 삽설된 연결부를 성형함을 특징으로 하는 합성수지관의 연결부 성형 방법.In the method of forming a connecting portion for softening and enlarging an end portion of a synthetic resin pipe and forming a packing subtraction groove, a groove 5 is formed in the mandrel 3 into which the end of the softened synthetic resin pipe is inserted, thereby forming a circular packing 1 in the groove. Insert the support tube (6) having the protrusion (7) to fix the packing so that it does not push back, and then cover the softened end of the synthetic resin tube (8) to form the groove 11 in the portion of the packing (1) Method of forming a joint portion of a synthetic resin tube, characterized in that for forming the connecting portion in which the packing is inserted by removing the support tube (6) and cooling. 외단부(3'')의 직경이 동체부(3')의 직경보다 좁게 형성된 만드렐(3)로 된 연결부 성형장치에 있어서 만드렐(3)의 동체부(3')에 패킹 지지요홈(5)를 형성하고 만드렐(3)의 동체부(3') 외측에 지지관(6)을 전후진할 수 있도록 착설하되 지지관(6)의 전진시 그 선단이 요홈(5)의 후연부와 일치되게 착설하고 지지관(6)에 관체 선단 지지용 돌륜(7)을 돌설하여서된 합성수지관의 연결부 성형장치.In the connecting part forming apparatus of the mandrel 3 formed with the diameter of the outer end 3 '' being narrower than the diameter of the body 3 ', a packing support groove is formed in the body 3' of the mandrel 3; 5) is formed so that the support tube 6 can be moved forward and backward on the outer side of the fuselage part 3 'of the mandrel 3, but the tip of the recessed part of the recess 5 is advanced when the support tube 6 is advanced. A device for forming a joint portion of a synthetic resin pipe, which is installed in accordance with the structure and protrudes a support wheel (6) to support the front end of the tube body.
KR1019830005917A 1983-12-13 1983-12-13 An apparatus and method for molding connection parts of plastic tubes KR850001949B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102200903B1 (en) 2020-06-12 2021-01-11 일우산업 주식회사 A forming apparatus for expanding end of plastic pipe, manufacturing method thereof
KR102215957B1 (en) 2020-09-17 2021-02-17 일우산업 주식회사 Multi-walled plastic pipe with expanded shape and packing groove integrally formed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102200903B1 (en) 2020-06-12 2021-01-11 일우산업 주식회사 A forming apparatus for expanding end of plastic pipe, manufacturing method thereof
KR102215957B1 (en) 2020-09-17 2021-02-17 일우산업 주식회사 Multi-walled plastic pipe with expanded shape and packing groove integrally formed

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