KR20020048121A - A extrusion nozle devices for plastic tube - Google Patents
A extrusion nozle devices for plastic tube Download PDFInfo
- Publication number
- KR20020048121A KR20020048121A KR1020000077411A KR20000077411A KR20020048121A KR 20020048121 A KR20020048121 A KR 20020048121A KR 1020000077411 A KR1020000077411 A KR 1020000077411A KR 20000077411 A KR20000077411 A KR 20000077411A KR 20020048121 A KR20020048121 A KR 20020048121A
- Authority
- KR
- South Korea
- Prior art keywords
- core
- extrusion
- extruder
- chamber
- extruding
- Prior art date
Links
- 238000001125 extrusion Methods 0.000 title claims description 42
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims description 32
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 239000000057 synthetic resin Substances 0.000 claims description 12
- 229920003002 synthetic resin Polymers 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000805 composite resin Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
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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
- 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
- B29C48/30—Extrusion nozzles or dies
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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
- 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
- B29C48/03—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
- B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Abstract
Description
본 발명은 지중매설용 합성수지관의 압출기 노즐장치에 관한 것으로서, 더욱 상세하게는 지중매설용 합성수지관을 제조하는데 사용되어지는 압출관에 다수의 중공을 형성할 수 있는 지중매설용 합성수지관의 압출기 노즐장치에 관한 것이다.The present invention relates to an extruder nozzle device of a synthetic resin pipe for underground embedding, and more particularly, to an extruder nozzle for underground laying synthetic resin pipes that can form a plurality of hollows in an extrusion tube used for manufacturing underground laying synthetic resin pipes. Relates to a device.
주지된 바와 같이, 지중에 매설되어 하수 및 오수를 배수시켜 주는 지중매설용 합성수지관은 오래전부터 다양하게 개발되어 왔으나, 그 중에서 가장 보편적인 것으로는 도 1과 같이 압출기를 이용하여 중공(3)을 구비한 사각형상의 압출관(2)을 압출한 다음, 상기 압출관(2)을 원통이 되게 감아 상호 면접되는 측면을 융착한 지중매설용 합성수지관(1)을 사용하여 왔다.As is well known, underground resin synthetic resin pipes that are buried in the ground to drain sewage and sewage have been developed in a long time, the most common of which is the hollow (3) using an extruder as shown in FIG. After extruding a rectangular extruded tube (2) provided, it has been used synthetic underground pipe (1) for burying the extruded tube (2) in a cylindrical shape and fusion welded side surfaces.
그러나, 상기와 같이 제조된 종래의 지중매설용 합성수지관(1)은 압출관(2)을 따라 다소 큰 중공(3)이 형성되어 있기 때문에 합성수지관(1)의 강도가 매우 약할 뿐만 아니라, 상기 압출관(2)이 압출될 때 큰 중공(3)으로 인하여 그 형체 유지가 극히 어려워 압출관(2)의 변형이 쉽게 발생하므로서 후공정에서 이루어지는 압출관(2)의 상호 융착이 불완전해지는 등의 결점이 있었다.However, the conventional underground embedding synthetic resin pipe (1) manufactured as described above is not only very weak in strength of the synthetic resin pipe (1) because a rather large hollow (3) is formed along the extrusion pipe (2), When the extruded tube 2 is extruded, it is extremely difficult to maintain its shape due to the large hollow 3, so that deformation of the extruded tube 2 easily occurs, resulting in incomplete fusion of the extruded tube 2 in a later step. There was a flaw.
그리고, 상기 압출관(2)의 변형을 방지하기 위해서는 압출기 일측에 공기나 물과 같은 유체로서 냉각하는 냉각장치가 별도로 구비되어야 하기 때문에 많은 시설비가 소요됨은 물론이고 상기 냉각장치를 설치할 수 있는 공간이 별도로 필요하다는 등의 문제점이 있었다.And, in order to prevent the deformation of the extruded pipe (2), since a cooling device for cooling as a fluid such as air or water must be provided separately on one side of the extruder, a lot of facility costs are required, as well as a space for installing the cooling device. There was a problem such as need separately.
따라서, 본 발명은 상기와 같은 문제점을 감안하여 안출한 것으로서, 압출관에 다수의 중공이 형성될 수 있게 압출기 노즐장치에 다수의 코어를 설치하는 한편, 상기 코어에 공기나 물과 같은 유체가 흐르면서 냉각할 수 있도록 유체챔버실을 구비한 코어 냉각공을 형성하므로서 압출관의 강도를 극대화 하는 동시에 압출과 동시에 냉각이 수행되도록 하여 압출관의 변형을 극소화하는 한편, 별도의 냉각장치가 필요없는 지중매설용 합성수지관의 압출기 노즐장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made in view of the above problems, while a plurality of cores are installed in the extruder nozzle apparatus so that a plurality of hollows can be formed in the extrusion pipe, while a fluid such as air or water flows through the core. Core cooling holes with fluid chamber chambers are formed to allow cooling, thereby maximizing the strength of the extruded pipe and cooling at the same time by extruding, minimizing the deformation of the extruded pipe and laying underground without the need for a separate cooling device. It is an object of the present invention to provide an extruder nozzle apparatus for a synthetic resin pipe.
도 1은 종래 지중매설용 합성수지관의 일부 사시도,1 is a partial perspective view of a conventional resin pipe for underground laying;
도 2는 본 발명에 따른 압출기 노즐장치의 분해사시도,2 is an exploded perspective view of an extruder nozzle device according to the present invention;
도 3은 본 발명에 따른 압출기 노즐장치가 설치된 상태를 보여주는 요부 단면도,Figure 3 is a sectional view of the main part showing a state in which the extruder nozzle apparatus according to the present invention is installed
도 4는 본 발명에 따라 성형된 지중매설용 합성수지관의 사시도.Figure 4 is a perspective view of a synthetic resin pipe for underground laying molded in accordance with the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
10:압출기 본체 20:압출기 노즐장치10: extruder main body 20: extruder nozzle device
21:노즐 베이스 21a:플랜지21: nozzle base 21a: flange
21b:압출로 21c:압출공21b: Extrusion furnace 21c: Extrusion hole
21d:압출홈 21e:유체챔버실21d: extruded groove 21e: fluid chamber seal
21g:유체 흡입공 22:코어부재21 g: fluid suction hole 22: core member
22a:수나사부 22b:코어 유체챔버실22a: male thread portion 22b: core fluid chamber seal
22c:코어 22d:코어 냉각공22c: core 22d: core cooler
23:코어카바 23a:플랜지23: Core cover 23a: Flange
23c:압출공간 24:압출카바23c: extrusion space 24: extrusion cover
24a:압출공 30:지중매설용 합성수지관24a: Extrusion hole 30: Synthetic resin pipe for underground laying
31:압출관 32:중공31: Extrusion pipe 32: Hollow
상기와 같은 목적을 달성하기 위한 본 발명은 지중매설용 합성수지관의 압출기 노즐장치를 형성함에 있어서, 압출기 본체에 설치되면서 그 중심축선상에 압출기 본체의 압출유로와 연통되는 압출로가 형성되고, 상기 압출로에서 그 선단방향으로 다수의 압출공이 방사상으로 분기됨과 아울러 그 선단에 상기 압출공들과 연결되는 링상의 압출홈이 형성되고, 그 선단 중심부에 유체챔버실이 형성되고 상기 유체챔버실에서 그 외주부로 외부의 유체가 흡입되는 유체 흡입공이 다수 마련된 노즐 베이스와; 상기 유체챔버실의 선단에 나사 결합되면서 그 중심부에 노즐 베이스의 유체챔버실과 연통되는 코어 유체챔버실이 형성되고, 그 선단부에 다수의 코어가 소정의 간극을 두고 균일하게 설치되며, 상기 각 코어의 중심에 코어 유체챔버실과 연통되는 코어 냉각공이 각각 형성되는 코어부재와; 상기 노즐 베이스에 볼팅결합되면서 수지가 유통되도록 코어부재와 소정의 간극을 유지함과 동시에 코어가 소정 돌출되게 압출공간이 형성된 코어카바와; 상기 코어카바에 볼팅결합되면서 그 중심에 코어가 소정의 간극을 두고 돌출되게 압출공이 마련된 압출카바; 등으로 구성되어진 것을 특징으로 한다.The present invention for achieving the above object in forming the extruder nozzle device of the underground resin composite resin pipe, is installed on the extruder body is formed on the center axis of the extrusion passage communicating with the extrusion flow path of the extruder body, In the extruder, a plurality of extruded holes are radially branched in the tip direction thereof, and a ring-shaped extruded groove connected to the extruded holes is formed at the front end thereof, and a fluid chamber chamber is formed at the center of the front end thereof. A nozzle base provided with a plurality of fluid suction holes through which external fluid is sucked into the outer circumference; The core fluid chamber chamber which is screwed to the front end of the fluid chamber chamber and communicates with the fluid chamber chamber of the nozzle base is formed at the center thereof, and a plurality of cores are uniformly installed with a predetermined gap at the front end of each of the cores. A core member each having a core cooling hole communicating with the core fluid chamber chamber at a center thereof; A core cover formed with an extrusion space such that the core is protruded while maintaining a predetermined gap with the core member so as to flow the resin while bolting to the nozzle base; An extrusion cover provided with an extrusion hole such that the core is protruded with a predetermined gap while bolted to the core cover; It is characterized by consisting of.
이한, 본 발명의 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 2는 본 발명에 따른 압출기 노즐장치의 분해사시도이고, 도 3은 본 발명에 따른 압출기 노즐장치가 설치된 상태를 보여주는 요부 단면도이며, 도 4는 본 발명에 따라 성형된 지중매설용 합성수지관의 사시도이다.Figure 2 is an exploded perspective view of the extruder nozzle apparatus according to the present invention, Figure 3 is a sectional view of the main part showing a state in which the extruder nozzle apparatus is installed according to the present invention, Figure 4 is a perspective view of a underground resin composite resin pipe molded in accordance with the present invention to be.
먼저, 압출기 본체(10)에 설치되는 압출기 노즐장치(20)의 노즐 베이스(21)는 그 후단 외주부에 압출기 본체(10)와 볼트로서 결합되는 플랜지(21a)가 형성되고, 상기 노즐 베이스(21)의 중심축선상에 압출기 본체(10)의 압출유로(11)와 연통되는 압출로(21b)가 형성되어지되, 상기 압출로(21b)가 갈수록 그 직경이 작아지도록 형성하는 한편, 상기 압출로(21b)에서 그 선단방향으로 다수의 압출공(21c)이 방사상으로 분기됨과 아울러 그 선단에 상기 압출공(21c)들과 연결되는 링상의 압출홈(21d)이 형성된다.First, the nozzle base 21 of the extruder nozzle apparatus 20 installed in the extruder main body 10 has a flange 21a coupled to the extruder main body 10 as a bolt at a rear end of the nozzle base 21, and the nozzle base 21 is formed. Extrusion passage 21b is formed on the central axis of the extruder main body 10 in communication with the extrusion passage 11, the extrusion passage 21b is formed so that its diameter becomes smaller, while the extrusion passage At 21b, a plurality of extruded holes 21c are radially branched in the tip direction thereof, and a ring-shaped extruded groove 21d connected to the extruded holes 21c is formed at the tip thereof.
또한, 상기 노즐 베이스(21)의 선단 중심부에 유체챔버실(21e)이 형성되고, 상기 유체챔버실(21e)의 내주부에 암나사부(21f)가 형성되며, 상기 유체챔버실(21 e)에서 그 외주부로 외부로부터 유체가 강제 흡입되는 유체 흡입공(21g)이 다수 형성되고, 상기 노즐 베이스(21)의 선단 가장자리에는 다수의 볼트공(21h)이 다수 형성된다.In addition, a fluid chamber chamber 21e is formed at the center portion of the tip of the nozzle base 21, and a female thread portion 21f is formed at an inner circumference of the fluid chamber chamber 21e, and the fluid chamber chamber 21e is formed. In the outer peripheral portion of the fluid suction hole (21g) is forcibly sucked from the outside is formed a plurality, a plurality of bolt holes (21h) are formed in the leading edge of the nozzle base (21).
상기 노즐 베이스(21)와 결합되는 코어부재(22)의 후단부에는 노즐 베이스( 21)의 유체챔버실(21e)에 구비되어진 암나사부(21f)와 대응되는 수나사부(22a)가 형성되고, 상기 코어부재(22)의 중심부에 노즐 베이스(21)의 유체챔버실(21e)과 연통되는 코어 유체챔버실(22b)이 형성되고, 상기 코어부재(22)의 선단부에 다수의 코어(22c)가 소정의 간극을 두고 균일하게 설치되어지되, 상기 각 코어(22c)의 중심에 코어 유체챔버실(22b)과 연통되는 코어 냉각공(22d)이 각각 형성된다. 이때, 상기 코어부재(22)는 중간부분에서 선단으로 갈수록 테이퍼가 형성된다.A male screw portion 22a corresponding to the female screw portion 21f provided in the fluid chamber chamber 21e of the nozzle base 21 is formed at the rear end of the core member 22 coupled to the nozzle base 21, A core fluid chamber chamber 22b communicating with the fluid chamber chamber 21e of the nozzle base 21 is formed at the center of the core member 22, and a plurality of cores 22c are formed at the front end of the core member 22. Is uniformly provided with a predetermined gap, and core cooling holes 22d communicating with the core fluid chamber chamber 22b are formed in the center of each core 22c, respectively. At this time, the core member 22 is tapered from the middle portion toward the tip.
상기 코어부재(22)의 외주부에 밀봉가능하게 설치되는 코어카바(23)는 그 후단 외주부에 상기 노즐 베이스(21)의 볼트공(21h)과 볼트(23b)로서 결합되는 플랜지(23a)가 형성되고, 상기 코어부재(22)와 소정의 간극을 유지함과 동시에 코어( 22c)가 소정 돌출되게 압출공간(23c)이 형성되는데, 상기 압출공간(23c)이 그 선단으로 갈수록 다소 좁아지며, 상기 코어카바(23)의 선단에는 다수의 볼트공(23d)이형성된다.The core cover 23, which is sealably installed on the outer circumference of the core member 22, has a flange 23a coupled to the bolt hole 21h of the nozzle base 21 and the bolt 23b on the outer circumference of the rear end thereof. In addition, while maintaining a predetermined gap with the core member 22, an extrusion space 23c is formed so that the core 22c protrudes a predetermined amount, and the extrusion space 23c becomes slightly narrower toward its tip, and the core A plurality of bolt holes 23d are formed at the tip of the cover 23.
상기 코어카바(23)에 결합되는 압출카바(24)는 그 가장자리로 코어카바(23)의 볼트공(23d)과 볼트(24c)로서 상호 결합되는 볼트공(24b)이 형성되고, 상기 압출카바(24)의 중심에는 코어(22c)가 소정의 간극을 두고 돌출되게 사각형상의 압출공(24a)이 마련된다.The extruded cover 24 coupled to the core cover 23 has a bolt hole 24b coupled to each other as a bolt hole 23d of the core cover 23 and a bolt 24c at an edge thereof, and the extruded cover 24 is connected to the core cover 23. At the center of the 24, a rectangular extrusion hole 24a is provided so that the core 22c protrudes with a predetermined gap.
미설명 부호 30은 지중매설용 합성수지관이고, 31은 압출관, 32는 중공들이다.Reference numeral 30 is a synthetic resin pipe for underground laying, 31 is an extrusion pipe, 32 is a hollow.
상기와 같이 구성된 압출기 노즐장치(20)의 작용을 상세히 설명하면 다음과 같다.Referring to the action of the extruder nozzle device 20 configured as described above in detail as follows.
먼저, 수지의 압출경로를 보면 도 3과 같이 압출기 본체(10)의 압출유로(11)를 따라 이송되어 온 수지는 그 단부에 결합되어진 압출기 노즐장치(20)의 압출로 (21b)로 유입되고, 상기 압출로(21b)를 따라 유입된 수지는 다수의 압출공(21c)을 따라 방사상으로 분기된 다음, 그 선단의 압출홈(21d)으로 이동된다.First, as shown in the extrusion path of the resin, the resin transferred along the extrusion passage 11 of the extruder body 10 as shown in FIG. The resin introduced along the extrusion path 21b is branched radially along the plurality of extrusion holes 21c and then moved to the extrusion groove 21d at its tip.
상기 압출홈(21d)으로 유입된 수지는 코어부재(22)와 코어카바(23) 사이의 압출공간(23c)을 따라 진행된 다음, 코어(22c)가 돌출된 압출카바(24)의 압출공(2 4a)으로 압출되면서 코어(22c)에 다수의 중공(32)이 구비되어진 압출관(31)이 성형되며, 이렇게 성형된 압출관(31)은 상호 면접되는 측벽끼리 융착하여 소정직경의 지중매설용 합성수지관(30)을 구성하게 된다.The resin introduced into the extrusion groove 21d proceeds along the extrusion space 23c between the core member 22 and the core cover 23, and then the extrusion hole of the extrusion cover 24 from which the core 22c protrudes ( Extruded tube 31 having a plurality of hollows 32 in the core 22c is molded while being extruded to 2 4a), and the extruded tube 31 thus formed is fused with sidewalls which are mutually interviewed to embed underground in a predetermined diameter. The synthetic resin pipe 30 is constituted.
한편, 상기 압출기 노즐장치(20)의 냉각결로를 보면 도 3과 같이 노즐 베이스(21)의 외주부에 형성되어진 유체 흡입공(21g)을 통해 유체챔버실(21e)로 외기가 강제 공급되며 상기 유체챔버실(21e)로 공급된 외기는 이와 연결된 코어부재(22)의 코어 유체챔버실(22b)로 공급된 다음, 각 코어(22c)의 중심을 관통하는 코어 냉각공(22d)을 통해 분사되면서 압출되고 있는 압출관(31)의 중공(32)을 통해 압출관 (31)을 냉각하므로서 고온에 의해 주름과 같은 변형이 발생하는 것을 방지한다.On the other hand, when the cooling condensation of the extruder nozzle device 20, as shown in FIG. The outside air supplied to the chamber chamber 21e is supplied to the core fluid chamber chamber 22b of the core member 22 connected thereto, and then sprayed through the core cooling holes 22d passing through the center of each core 22c. The extrusion tube 31 is cooled through the hollow 32 of the extruded tube 31 being extruded, thereby preventing deformation such as wrinkles from occurring due to high temperature.
따라서, 본 발명은 압출관(31)에 다수의 중공(32)이 형성될 수 있게 압출기 노즐장치(20)에 다수의 코어(22c)를 설치하는 한편, 상기 압출기 노즐장치(20)의 코어(22c)에 공기나 물과 같은 유체가 흐르면서 냉각할 수 있도록 유체챔버실(22b)을 구비한 코어 냉각공(22d)을 형성하므로서 압출관(31)의 강도를 극대화 하는 동시에 압출과 동시에 냉각이 수행되도록 하여 압출관(31)의 변형을 극소화하는 한편, 별도의 냉각장치가 필요없는 매우 유용한 효과가 있다.Therefore, the present invention provides a plurality of cores 22c in the extruder nozzle apparatus 20 so that a plurality of hollows 32 can be formed in the extrusion pipe 31, while the core of the extruder nozzle apparatus 20 ( 22c) forms a core cooling hole 22d having a fluid chamber chamber 22b for cooling by flowing a fluid such as air or water, thereby maximizing the strength of the extruded tube 31 and simultaneously cooling the extrusion. While minimizing the deformation of the extruded tube 31, there is a very useful effect that does not require a separate cooling device.
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| KR10-2000-0077411A KR100392235B1 (en) | 2000-12-16 | 2000-12-16 | A extrusion nozle devices for plastic tube |
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| KR10-2000-0077411A KR100392235B1 (en) | 2000-12-16 | 2000-12-16 | A extrusion nozle devices for plastic tube |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040003776A (en) * | 2002-07-04 | 2004-01-13 | 이강주 | Die for extruding machine |
| KR20040004754A (en) * | 2002-08-19 | 2004-01-14 | (주)용전 | Cooling structure of hollow pipe for forming device of plastic pipe |
| KR100484617B1 (en) * | 2004-07-16 | 2005-04-22 | 유명상 | Extrusion die of extrusion molding machine and method for manufacturing extruded pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100615921B1 (en) | 2005-01-28 | 2006-08-25 | 유명상 | Extrusion die of extrusion molding machine and Extruded pipe for manufacturing a spiral pipe, and method for manufacturing thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4734240A (en) * | 1986-01-24 | 1988-03-29 | Hoechst Celanese Corporation | Melt-extrusion of polymer which is capable of forming an anisotropic melt phase to form large shaped articles exhibiting improved polymeric orientation |
| US5261988A (en) * | 1989-09-22 | 1993-11-16 | George A. Petzetakis | Making large-diameter pipe |
| JPH0733049B2 (en) * | 1990-12-26 | 1995-04-12 | 積水化成品工業株式会社 | Method for producing thermoplastic polyester-based resin foam sheet |
| JPH06190899A (en) * | 1992-12-25 | 1994-07-12 | Sekisui Chem Co Ltd | Extruder equipped with cooling device for molding mold |
| JPH09123250A (en) * | 1995-10-26 | 1997-05-13 | Sekisui Chem Co Ltd | Manufacture of hollow foam |
| JP3315901B2 (en) * | 1997-09-04 | 2002-08-19 | 三菱樹脂株式会社 | Synthetic resin pipe molding apparatus and method for producing the same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040003776A (en) * | 2002-07-04 | 2004-01-13 | 이강주 | Die for extruding machine |
| KR20040004754A (en) * | 2002-08-19 | 2004-01-14 | (주)용전 | Cooling structure of hollow pipe for forming device of plastic pipe |
| KR100484617B1 (en) * | 2004-07-16 | 2005-04-22 | 유명상 | Extrusion die of extrusion molding machine and method for manufacturing extruded pipe |
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