KR20040004754A - Cooling structure of hollow pipe for forming device of plastic pipe - Google Patents
Cooling structure of hollow pipe for forming device of plastic pipe Download PDFInfo
- Publication number
- KR20040004754A KR20040004754A KR1020020048992A KR20020048992A KR20040004754A KR 20040004754 A KR20040004754 A KR 20040004754A KR 1020020048992 A KR1020020048992 A KR 1020020048992A KR 20020048992 A KR20020048992 A KR 20020048992A KR 20040004754 A KR20040004754 A KR 20040004754A
- Authority
- KR
- South Korea
- Prior art keywords
- cooling
- tube
- pipe
- die
- hollow
- Prior art date
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 48
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 11
- 239000000057 synthetic resin Substances 0.000 claims abstract description 11
- 239000003507 refrigerant Substances 0.000 claims description 16
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 description 19
- 238000001125 extrusion Methods 0.000 description 8
- 239000002826 coolant Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009434 installation Methods 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
-
- 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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
본 발명은 성형부를 통하여 압출성형된 중공관을 와인딩하여 합성수지관을 제조토록 한 성형장치에 있어, 중공관의 압출성형시 중공관내에서의 냉각이 보다 효과적으로 이루어질 수 있도록 한 합성수지관 성형장치용 중공관 냉각구조에 관한 것이다.The present invention is a molding apparatus for manufacturing a synthetic resin tube by winding an extruded hollow tube through a molding part, the hollow tube for a synthetic resin tube molding apparatus for cooling in the hollow tube more effectively during extrusion of the hollow tube It relates to a cooling structure.
하수관 성형장치는 대체적으로 배합부와 압출부와 성형부와 진공냉각부와 와인딩부로 구성되며, 배합부에 의해 배합된 합성수지 원료가 압출부에 의해 열용융된 상태에서 성형부를 통하여 중공을 갖는 중공관이 압출성형되고, 성형된 중공관은 진공냉각부를 통과하면서 냉각이 이루어지며, 냉각된 중공관은 와인드부에 의해 와인딩되면서 보조압출부로부터 압출되는 압출물에 의해 접합부가 접합되게 하여 원통형의 하수관을 얻도록 하고 있다.The sewer pipe forming apparatus is generally composed of a compounding part, an extrusion part, a molding part, a vacuum cooling part and a winding part, and a hollow tube having a hollow through the molding part in a state in which the synthetic resin raw material blended by the compounding part is hot melted by the extrusion part. The extruded, molded hollow tube is cooled while passing through the vacuum cooling portion, and the cooled hollow tube is joined by an extrudate extruded from the sub-extrusion while being wound by the wind portion to form a cylindrical sewer pipe. I'm getting.
이러한 하수관의 성형공정 중 성형부에 의해 성형되는 중공관은 이중벽으로서 제품의 강도가 보강되게하고 재료비를 절감토록 하며 제품의 무게를 줄이기 위한 것으로서, 그 단면 형상 또한 단순히 통공을 사이에 두고 이중벽이 형성되게 하거나 또는 통공내에 일자형이나 십자형 등 다양한 형상의 보강편을 형성하여 강도를 더욱 보강토록 하고 있다.The hollow tube formed by the forming part during the forming process of the sewage pipe is a double wall to reinforce the strength of the product, to reduce the material cost, and to reduce the weight of the product. In order to further reinforce the strength by forming a reinforcing piece of various shapes such as a straight or cross shape in the through hole.
이때 중공부의 단면형상은 성형부 중 내부다이 단부에 갖는 성형돌부의 갯수나 형태 배열 등에 의해 결정된다.At this time, the cross-sectional shape of the hollow portion is determined by the number, shape arrangement, or the like of the forming protrusions at the inner die end of the forming portion.
또한 성형부를 이용한 중공관의 성형시에는 하수관의 제조시 원료로 이용되는 폴리에스텔의 특성상 급속 냉각시켜주어야만 강도가 강화되고 또 성형 후 곧바로 냉각시켜 주어야만 제형태를 유지하게 된다.In addition, when forming the hollow tube using the molding part, due to the characteristics of the polyester used as a raw material for the manufacture of the sewage pipe, the strength is strengthened only by cooling and immediately after molding to maintain the shape.
따라서 종래에도 실용신안등록 제230931호와 동제243099호 등과 같이 성형부에 의해 압출성형된 중공관의 내부에서도 냉각이 이루어지도록 하고 있다.Accordingly, in the related art, cooling is also performed inside the hollow tube extruded by the molding part, such as Utility Model Registration No. 230931 and No. 243099.
그러나 실용신안등록 제230931호는 노즐베이스의 외주부에 형성되어진 유체흡입공을 통하여 유체쳄버실로 공급된 외기는 이와 연결된 코어부재의 코어유체챔버실로 공급되면 각 코어의 중심을 관통하는 코어 냉각공을 통하여 중공관내에 분사되면서 냉각이 이루어지도록 한 것으로서, 이는 유체흡입공을 통하여 공급되는 외기가 용융상태의 압출물로 인하여 고열이 발생되는 노즐베이스와 코어부재의 유체쳄버실 및 냉각공을 통과하면서 큰 열손실을 가져오게 된다.However, Utility Model Registration No. 230931 discloses that the outside air supplied to the fluid chamber chamber through the fluid suction hole formed in the outer circumference of the nozzle base is supplied to the core fluid chamber chamber of the core member connected thereto through a core cooling hole passing through the center of each core. It is to be cooled while being injected into the hollow tube, which is a large heat as the outside air supplied through the fluid suction hole passes through the fluid chamber chamber and the cooling hole of the nozzle base and the core member where high heat is generated due to the molten extrudate It will result in loss.
또한 중공관은 진공냉각기를 통과하면서 진공냉각된 후 곧바로 진행되는 와인딩으로 원통형으로 길게 성형되는 합성수지관을 따라 코일형태로 통과하여 최종 배출되므로 통상 소정길이의 합성수지관을 제작하는데 필요한 중공관의 길이는 약 m로서 매우 길고 또 중공관 내부의 보강편은 외기의 흐름을 방해하게 되는 바 그 흐름이 원활하지 못한 냉각효과는 거의 기대할 수 없는 수준에 불과하다.In addition, since the hollow tube passes through a vacuum cooler and is vacuum discharged immediately after passing through the vacuum cooler, the hollow tube passes along a synthetic resin tube that is formed into a long cylindrical shape and is finally discharged. Thus, the length of the hollow tube required for manufacturing a synthetic resin tube having a predetermined length is As long as about m and the reinforcing piece inside the hollow tube interferes with the flow of outside air, the cooling effect that the flow is not smooth is almost unexpected.
또한 실용신안등록 제243099호는 성형부재의 사각돌출부 전방에 냉각공간을 갖는 냉각부재를 연장형성하여 냉각공간내에 고정부재 후방으로부터 삽입된 급수파이프를 통하여 급수가 이루어져 냉각되도록 한 것으로서, 이는 비순환식으로서, 냉각효과가 큰 냉매를 이용할 수가 없고 또 냉각공간내에 급수된 냉각수의 배수가 원활하게 이루어질 수가 없어 이 역시 냉각효과는 거의 기대할 수가 없다.In addition, Utility Model Registration No. 243099 is to extend the cooling member having a cooling space in front of the rectangular projection of the molding member to be supplied with water through the water supply pipe inserted from the rear of the fixing member in the cooling space, which is a non-cyclic type In addition, the cooling effect with a large cooling effect cannot be used, and the cooling water drained in the cooling space cannot be smoothly discharged.
이에 본 발명은 중공관의 압출성형시 그 내부에서의 냉각이 급속으로 이루어질 수 있도록 하여 제품의 강도 강화는 물론 변형에 의한 불량 발생우려를 없애줄 수가 있고, 성형속도의 증가로 생산성향상을 기대할 수가 있는 합성수지관 성형장치용 중공관 냉각구조를 제공함에 그 목적이 있다.Therefore, the present invention can rapidly cool the inside of the hollow tube during extrusion molding to eliminate the possibility of defects caused by deformation as well as the strength of the product, can be expected to improve productivity by increasing the molding speed It is an object of the present invention to provide a hollow tube cooling structure for a synthetic resin tube forming apparatus.
상기한 목적달성을 위하여 본 발명은 막힌 구조의 외부관체내에 열린 구조의 내부관체를 끼워서 냉동싸이클을 반복하는 일반냉동기와 연결하여 냉각기를 구성한 다음 냉각관이 내부다이의 후방으로부터 성형돌부를 관통하여 압출성형된 중공관 내부로 일부 돌출되도록 구성함을 특징으로 한다.In order to achieve the above object, the present invention connects an internal structure of an open structure to an external structure of a closed structure and connects it with a general refrigerator that repeats a freezing cycle, and then configures a cooler, and then the cooling tube penetrates the forming protrusion from the rear of the inner die. It is characterized in that it is configured to partially protrude into the extruded hollow tube.
도 1 : 본 발명의 단면구성도.1 is a cross-sectional view of the present invention.
도 2 : 본 발명의 요부분해사시도.2 is a partial exploded perspective view of the present invention.
도 3 : 본 발명의 요부단면구성도.3 is a cross-sectional view of main parts of the present invention.
도 4 : 본 발명에 의해 제조되는 하수관의 사시도.4 is a perspective view of the sewer pipe produced by the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
(2)--성형부(4)--압출부(2)-molding part (4)-extrusion
(6)--외부헤드다이(8)--진공냉각부(6)-Outer head die (8)-Vacuum cooling part
(10)--외부다이(12)--내부다이(10)-Outside Die (12)-Inside Die
(14)--내부헤드다이(16)--너트(14)-Internal Head Die (16)-Nut
(18)--연결관(20)--중공관(18)-connector (20)-hollow tube
(22)--중공(24)--성형돌부(22)-Hollow (24)-Shaping protrusion
(26)--관통공(28)--냉각기(26)-Through Hole (28)-Cooler
(30)--연결구(32)--유입호스(30)-Connector (32)-Inlet Hose
(34)--배출호스(36)--외부관체(34)-Exhaust Hose (36)-External Body
(38)--내부관체(40)--캡(38)-Inner Tube (40)-Cap
도1은 본 발명의 단면구성도로서, 본 발명은 1차성형물을 와인딩하여 하수관을 제조하는 하수관 성형장치의 성형부(2)에 설치되는 것으로서, 성형부(2)는 압출부(4)와 연통된 외부헤드다이(6)와, 외부헤드다이(6)단부에 진공냉각부(8)와 마주하도록 연결설치되는 외부다이(10)와, 외부다이(10)내에 소정의 간격을 두고 설치되는 내부다이(12)와, 외부헤드다이(6)의 내면과 소정간격을 두고 설치되고 외부헤드다이(6)배면에 연결고정되며 내부다이(12)를 연결지지하는 내부헤드다이(14)와, 관체형으로서 내부다이 (12)에 나사결합되고 내부헤드다이(14)를 관통시켜서 너트 (16)의 죄임으로 내부다이(12)를 내부헤드다이(14)에 연결고정하는 연결관(18)으로 구성된다.1 is a cross-sectional configuration of the present invention, the present invention is to be installed in the shaping section 2 of the sewage pipe forming apparatus for manufacturing a sewer pipe by winding the primary molding, the shaping section (2) and the extrusion section (4) The external head die 6 which is in communication with each other, the external die 10 connected to the end of the external head die 6 so as to face the vacuum cooling unit 8, and the external die 10 are provided at predetermined intervals. An inner head die 14 and an inner head die 14 installed at a predetermined distance from the inner surface of the outer head die 6 and fixed to the rear of the outer head die 6 and supporting the inner die 12; As a tubular type, it is screwed into the inner die 12 and penetrates the inner head die 14 so that the inner die 12 is connected to the inner head die 14 by fastening the nut 16. It is composed.
상기한 구조의 성형부(2)는 일반적인 구조로서, 내부다이(12)를 내부헤드다이(14)와 분리구성하여 연결관(18)으로 연결구성함은 얻고자 하는 중공관(20)의 크기나 중공(22)의 형상 등에 따라 내부다이(12)를 교체하기 위한 것으로서, 일체형으로 구성하더라도 무방하다.The molded part 2 of the above structure is a general structure, and the inner die 12 is separated from the inner head die 14 to be connected to the connecting pipe 18 so that the size of the hollow tube 20 to be obtained It is for replacing the inner die 12 according to the shape of the hollow 22 or the like, and may be formed in one piece.
성형부(2)를 구성하는 내부다이(12)는 대체로 원뿔형의 몸체단부에 얻고자 하는 중공관(20)의 중공(12)형태에 따라 1개이상의 성형돌부(24)가 형성되며, 그 후방으로부터 각 성형돌부(24)를 관통하는 관통공(26)을 형성하여 구성한다.The inner die 12 constituting the molding part 2 is formed with one or more molding protrusions 24 in accordance with the shape of the hollow 12 of the hollow tube 20 to be generally obtained at the end of the conical body. The through hole 26 which penetrates each shaping | molding protrusion part 24 from this is formed.
내부다이(12)의 각 성형돌부(24)가 갖는 관통공(26)에는 각기 성형부(2)의 후방으로부터 냉각기(28)의 냉각관이 관통하여 그 전방으로 일부 돌출되게 한다.Each through hole 26 of each of the forming protrusions 24 of the inner die 12 allows the cooling tube of the cooler 28 to penetrate from the rear of the forming unit 2 and partially protrude in front thereof.
냉각기(28)는 도3에서와 같이 T형 연결구(30)와, 각각 연결구(30)에 연결되는 유입호스(32) 및 배출호스(34)와, 연결구(30) 일단에 배출호스(34)와 연통되게 연결고정되는 막힌 구조의 긴 외부관체(36)와, 유입호스(32)와 연결되고 외부관체 (36)내에 깊숙히 삽입되는 열린구조의 긴 내부관체(38)와, 유입호스(32)를 통하여 냉매를 공급하는 냉매공급부(도시안됨)로 구성되며, 유입호스(32)로 유입된 냉매가 내부관체(38)를 통과하여 그 단부에서 분출되어 외부관체(36)사이로 배출되면서 외부관체(36)가 냉각되도록 한다.As shown in FIG. 3, the cooler 28 has a T-shaped connector 30, an inlet hose 32 and an outlet hose 34 connected to the connector 30, respectively, and an outlet hose 34 at one end of the connector 30. Long outer tube 36 of the closed structure is connected and secured in communication with the inlet hose 32, the long inner tube 38 of the open structure connected to the inlet hose 32 and deeply inserted into the outer tube 36, the inlet hose 32 It consists of a refrigerant supply unit (not shown) for supplying a refrigerant through, the refrigerant flowing into the inlet hose 32 passes through the inner tube 38 and is ejected from the end thereof is discharged between the outer tube 36 and the outer tube ( Allow 36) to cool.
상기에 있어, 냉각기(28)의 냉각관을 이중으로 구성함은 냉매의 순환 및 내부다이(12)를 관통하는 냉각관의 단부에서 가장 활발한 열교환이 이루어지도록 하기 위한 것이나, 내부관체(38)를 짧게 형성하더라도 냉각효과는 기대할 수 있게 되므로 냉각관이 내부다이(12)를 관통하여 중공부내에서도 냉각이 이루어질 수 있도록 한 구조이면 모두 만족한다.In the above, the dual configuration of the cooling tube of the cooler 28 is for the most active heat exchange at the end of the circulation of the refrigerant and the cooling tube passing through the inner die 12, but the inner tube 38 Even if it is formed short, the cooling effect can be expected, so all the structures are satisfied if the cooling tube penetrates the inner die 12 so that cooling can be performed even in the hollow part.
냉각기(28)는 연결관(18)단부에 캡(40)을 통하여 연결설치하여 내부다이(12)의 교체시 쉽게 분리할 수 있도록 하는 것이 바람직하나, 내부다이(12)가 내부헤드다이(14)와 일체로 형성될 경우 이 역시 내부다이(12)에 일체로 연결고정해 줄 수도 있다.The cooler 28 is preferably connected to the end of the connecting pipe 18 through the cap 40 so that the cooler 28 can be easily removed when the inner die 12 is replaced. However, the inner die 12 is the inner head die 14. If formed integrally with this may also be fixed to the inner die (12) integrally connected.
냉매 공급부는 냉매를 냉각시키고 냉각된 냉매를 냉각기(28)에 공급하여 순환되게 한 일반적인것으로서, 압축, 응축, 팽창, 증발의 4단계 물리적 변화로 냉동싸이클을 반복하는 통상의 일반냉동기가 이용되며, 이외에 냉매를 냉각시켜 순환식으로 공급할 수 있는 일반 모든 냉각장치를 포함하므로 도면 및 구체적인 구성 설명은 생략하기로 한다.Refrigerant supply unit is a general to cool the refrigerant and to supply the cooled refrigerant to the cooler 28 to be circulated, a conventional general freezer that repeats the refrigeration cycle with four physical changes of compression, condensation, expansion, evaporation, In addition, since it includes all the general cooling device that can be supplied to the refrigerant by cooling the circulation and detailed configuration description will be omitted.
본 발명은 성형부(2)를 구성하는 내부다이(12)가 내부헤드다이(14)와 분리구성될 경우 얻고자 하는 중공관(20)의 중공(22)형태에 따라 선택된 내부다이(12)를 설치한 후 냉각기(28)의 냉각관이 연결관(18)의 후단부에 결합고정되는 캡(40)의 통공과 내부다이(12)의 각 성형돌부(24)가 갖는 관통공(26)을 관통하도록 하고, 유입호스(32)와 배출호스(34)는 냉매공급부와 연결하여 냉매가 순환되게 한 다음 성형작업을 진행시켜주게 되면 성형돌부(24) 전방으로 일부 돌출된 냉각기(28)의 냉각관은 성형부(2)를 통과하여 압출성형된 중공관(20)의 중공(22)내에서 중공관(20)과의 열교환으로 중공관(20) 내부를 냉각시켜주게 된다.According to the present invention, when the inner die 12 constituting the molding part 2 is separated from the inner head die 14, the inner die 12 selected according to the hollow 22 shape of the hollow tube 20 to be obtained is obtained. After installation, the through hole 26 of the through hole of the cap 40 and the forming protrusions 24 of the inner die 12 to which the cooling tube of the cooler 28 is fixedly coupled to the rear end of the connecting tube 18 is fixed. And the inlet hose 32 and the discharge hose 34 are connected to the coolant supply unit to allow the coolant to circulate, and then proceed with the molding operation of the cooler 28 that partially protrudes toward the forming protrusion 24. The cooling tube cools the inside of the hollow tube 20 by heat exchange with the hollow tube 20 in the hollow 22 of the hollow tube 20 extruded through the molding unit 2.
즉 냉매공급부를 통하여 공급된 냉매는 유입호스(32)를 통하여 곧바로 열린구조의 내부관체(38)를 통과하면서 외부관체(36)의 내측 단부에 이르러 분출되고분출된 냉매는 외부관체(36)과 내부관체(38)사이에 갖는 공간을 통하여 되돌아나오면서 외부관체(36)을 냉각시켜주게되고, 외부관체(36)을 통과한 냉매는 배출호스 (34)를 통하여 배출되어 순환하게 된다.That is, the coolant supplied through the coolant supply part passes through the inner tube 38 of the open structure directly through the inlet hose 32 and reaches the inner end of the outer tube 36, and the ejected coolant is discharged from the outer tube 36. The outer tube 36 is cooled while returning through the space between the inner tube 38, and the refrigerant passing through the outer tube 36 is discharged and circulated through the discharge hose 34.
이때 내부관체(38)를 통과하여 분출된 냉매는 외부관체(36)단부의 내벽과 부딪혀 되돌아 나오게 되므로 내부다이(12)의 성형돌부(24)를 관통하여 그 전방으로 일부돌출된 냉각관 중 외부관체(36)의 단부와 가장 활발한 열교환이 이루어지게되므로 압출성형 직후의 중공관(20)내부에서 활발한 열교환이 이루어져 급속 냉각시켜 주게 되고 또 냉매가 내외측관체(36)(38)사이의 공간을 통하여 되돌아 나오면서 외부관체(36)를 전체적으로 냉각시켜 내부관체(38)로 공급되는 냉매를 보냉시켜 주게 되므로 열손실이 거의 없어 냉각장치로서의 기능을 충실히 수행할 수가 있게 되는 것이다.At this time, the refrigerant ejected through the inner tube 38 is hit by the inner wall of the end of the outer tube 36 so that the refrigerant is returned, so that the refrigerant passes through the forming protrusions 24 of the inner die 12 and partially protrudes forward. Since the most active heat exchange is made with the end of the tubular body 36, active heat exchange occurs inside the hollow tube 20 immediately after extrusion molding, thereby rapidly cooling the refrigerant, and the space between the inner and outer tubular bodies 36 and 38 is cooled. By returning through the cooling through the outer tube 36 as a whole to cool the refrigerant supplied to the inner tube 38, there is almost no heat loss, so that the function as a cooling device can be faithfully performed.
이와 같이 본 발명은 막힌구조의 외부관체(36)내에 열린구조의 내부관체(38)를 끼워서 냉동싸이클을 반복하는 일반 냉매공급부와 연결하여 냉각기를 구성한 다음 냉각관이 내부다이를 관통하여 압출성형된 중공관 내부로 일부 돌출되게 하므로서, 중공관(20) 내부에서도 급속냉각이 이루어질 수가 있어 급속냉각시 강도가 강화되는 폴리에스텔 제품의 재질 특성을 최대한 이용하여 제품의 강도를 강화시켜줄 수가 있고, 냉각과정에서 중공관의 변형을 방지할 수가 있어 변형에 의한 불량발생을 없애줄 수가 있으며, 성형속도의 증가로 생산성향상을 기대할 수가 있는 유용한 발명인 것이다.As such, the present invention connects the internal pipe 38 of the open structure to the general refrigerant supply unit repeating the refrigeration cycle by inserting the internal pipe 38 of the closed structure into a closed pipe, and then the cooling pipe is extruded through the inner die. By partially protruding into the hollow tube, rapid cooling can be achieved even inside the hollow tube 20, thereby making the most of the material properties of the polyester product which is enhanced in rapid cooling, thereby enhancing the strength of the product, and cooling process It is a useful invention that can prevent the deformation of the hollow tube to eliminate the occurrence of defects due to deformation, can be expected to improve the productivity by increasing the molding speed.
Claims (1)
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020020048992A KR20040004754A (en) | 2002-08-19 | 2002-08-19 | Cooling structure of hollow pipe for forming device of plastic pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020020048992A KR20040004754A (en) | 2002-08-19 | 2002-08-19 | Cooling structure of hollow pipe for forming device of plastic pipe |
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| Application Number | Title | Priority Date | Filing Date |
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| KR2020020020121U Division KR200290818Y1 (en) | 2002-07-04 | 2002-07-04 | Cooling structure of hollow pipe for forming device of plastic pipe |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JPH04187416A (en) * | 1990-11-20 | 1992-07-06 | Sekisui Chem Co Ltd | Method of extruding thermoplastic resin film sheet |
| US5132062A (en) * | 1989-04-28 | 1992-07-21 | Brabor S.R.L. | Extrusion head for foamed material, in particular for polyvinyl-chloride-based foamed material |
| JPH09123250A (en) * | 1995-10-26 | 1997-05-13 | Sekisui Chem Co Ltd | Manufacture of hollow foam |
| KR200243099Y1 (en) * | 2001-05-14 | 2001-10-15 | 김종율 | a |
| KR20020048121A (en) * | 2000-12-16 | 2002-06-22 | 유명상 | A extrusion nozle devices for plastic tube |
-
2002
- 2002-08-19 KR KR1020020048992A patent/KR20040004754A/en not_active Application Discontinuation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US5132062A (en) * | 1989-04-28 | 1992-07-21 | Brabor S.R.L. | Extrusion head for foamed material, in particular for polyvinyl-chloride-based foamed material |
| JPH04187416A (en) * | 1990-11-20 | 1992-07-06 | Sekisui Chem Co Ltd | Method of extruding thermoplastic resin film sheet |
| JPH09123250A (en) * | 1995-10-26 | 1997-05-13 | Sekisui Chem Co Ltd | Manufacture of hollow foam |
| KR20020048121A (en) * | 2000-12-16 | 2002-06-22 | 유명상 | A extrusion nozle devices for plastic tube |
| KR200243099Y1 (en) * | 2001-05-14 | 2001-10-15 | 김종율 | a |
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