KR0136249B1 - Method for the production of double wall panel - Google Patents
Method for the production of double wall panelInfo
- Publication number
- KR0136249B1 KR0136249B1 KR1019930017640A KR930017640A KR0136249B1 KR 0136249 B1 KR0136249 B1 KR 0136249B1 KR 1019930017640 A KR1019930017640 A KR 1019930017640A KR 930017640 A KR930017640 A KR 930017640A KR 0136249 B1 KR0136249 B1 KR 0136249B1
- Authority
- KR
- South Korea
- Prior art keywords
- synthetic resin
- tube
- small
- pipe
- resin
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
Abstract
Description
본 발명은 땅속에 매몰되는 하수도관 또는 전선용관으로 주로 사용되는 합성 수지관의 제조방법 및 장치에 관한 것으로서, 특히 나선상의 중공부가 연속하여 형성됨으로써 이중벽을 갖게 되고 중공부 사이의 연결부가 Ⅰ형 빔의 형상으로 형성되고 표면이 평활하게 형성되어 강도가 강화된 합성수지 이중벽 평활관의 제조 방법 및 제조 장치에 관한 것이다.The present invention relates to a method and apparatus for manufacturing a synthetic resin pipe mainly used as a sewer pipe or an electric wire pipe buried in the ground. Particularly, a spiral hollow portion is formed continuously to have a double wall, and the connection portion between the hollow portions is an I-type beam. The present invention relates to a method and apparatus for manufacturing a synthetic resin double wall smooth tube formed in the shape of and having a smooth surface.
종래의 나선형 주름관은 제1도에 도시된 바와 같이 합성수지관(10)의 외면에 중공 보강재(11)가 나선형상으로 돌출된 형태로 되어 있다.In the conventional spiral corrugated pipe, as shown in FIG. 1, the hollow reinforcing material 11 protrudes in a spiral shape on the outer surface of the synthetic resin pipe 10.
즉, 제2도에 도시된 바와 같이 내부에 중공부(12`)가 형성되고 밑면이 양측으로 확장된 장방형의 합성수지(12)를 그 단부(12``)가 서로 겹치도록 회전 롤러(13)에 감고, 겹쳐진 부분을 압착 롤러(14)로 압착하여 성형 제조하였다.That is, as shown in FIG. 2, the hollow roller 12 'is formed therein, and the rotary roller 13 so that the end portions 12 ″ overlap the rectangular synthetic resin 12 having both sides thereof extended to both sides. It wound up, and the overlapped part was crimped | bonded by the crimping roller 14, and it molded and manufactured.
따라서, 상기의 합성수지관은 내주면이 평활하게 형성되고 관의 외주면은 나선상으로 돌출된 중공부(12`)가 형성되어, 나선상의 중공부(12`)는 관의 외측에서 관의 길이에 따른 강도를 보상하여 관의 실제 두께가 그리 크지 않아도 충분한 강도를 갖도록 한다.Therefore, the synthetic resin pipe is formed with a smooth inner circumferential surface and the outer circumferential surface of the tube is formed with a hollow portion 12` protruding in a spiral shape, the helical hollow portion 12` is the strength according to the length of the tube at the outside of the tube To compensate for this, make sure that the tube has sufficient strength even if the actual thickness of the tube is not very large.
그러나, 상기와 같이 형성된 종래의 나선형 주름관은 성형 취출된 관의 외주면이 요철 형상을 하고 있어 관의 매몰시 작업이 번거롭고 합성수지 사이의 접착이 견고하지 않아 쉽게 손상되는 문제점이 있다.However, the conventional spiral corrugated pipe formed as described above has a problem that the outer circumferential surface of the molded take-out tube has a concave-convex shape, which is troublesome when the tube is buried, and the adhesive between the synthetic resins is not firm, and thus easily damaged.
종래 나선관의 다른 실시 예로는 원형의 관에 나선 형상의 보강재가 돌출된것으로서, 제3도에 도시된 바와 같은 장치를 사용하여 제작하고 있다.In another embodiment of the conventional spiral tube, a spiral reinforcing member protrudes from a circular tube, and is manufactured using the apparatus as shown in FIG.
통상의 제관용 롤러(25)의 상측 부분에 타원형공(22`)이 천공된 ┴ 형상의 압출구(22)를 같는 진공조(21)를 설치하고, 압출구(22)의 타원형공(22`)으로 가이드 봉(23)을 관통 결합시켜 그 끝단이 가이드 냉각조(24)의 상측에 위치되도록 한다.An elliptical hole 22 of the extruded port 22 is provided by installing a vacuum chamber 21 having the same extruded hole 22 having an elliptical hole 22 'formed in an upper portion of a normal pipe forming roller 25. The guide rod 23 is penetrated through `) so that its end is positioned above the guide cooling tank 24.
또한, 일정한 각도로 만곡되어 있는 한쌍의 가이드 냉각조(24)의 일측면과 내면에 수개의 냉각공(24`)을 형성하여 압출구(22)를 통해 빠져 나온 합성수지를 순간적으로 냉각시킨다.In addition, a plurality of cooling holes 24 'are formed on one side and the inner surface of the pair of guide cooling tanks 24 curved at a predetermined angle to instantly cool the synthetic resin exiting through the extrusion port 22.
제관용 롤러(25)는 합성수지를 일정한 각도로 회전시키면서 압착 롤러(26)가 합성수지의 하면을 서로 접착시키게 한다.The canning roller 25 causes the pressing roller 26 to adhere the lower surface of the synthetic resin to each other while rotating the synthetic resin at a predetermined angle.
이때, 상기의 접착면에 합성수지를 별도로 공급하여 이를 압착함으로서 접착을 견고하게 할 수 있다.At this time, by supplying a synthetic resin separately to the adhesive surface can be pressed to firm adhesion.
제관용 롤러(25)의 회전에 따라 하면이 접착된 합성수지가 제관용 롤러의 축방향으로 전진하게 되므로 나선형의 주름을 가진 합성수지관이 형성된다.Synthetic resin bonded to the lower surface is advanced in the axial direction of the corrugation roller according to the rotation of the canning roller 25, thereby forming a synthetic resin tube having a spiral corrugation.
이때, 상기 나선형 주름의 상측에는 상기 타원형공(22`)을 통해 빠져나와 가이드 봉(23)에 의해 안내된 보강부가 형성된다.At this time, the reinforcing portion guided by the guide rod 23 is formed through the elliptical hole 22` on the upper side of the spiral pleat.
그러나, 상기와 같이 형성된 주름관 또한 관의 외측면에 요철이 형성되어 관매몰시 작업이 곤란한 문제점이 있고, 주름 외측으로부터의 외부 충격에 취약한 문제점이 있다.However, the corrugated pipe formed as described above also has a problem in that irregularities are formed on the outer surface of the tube, which makes it difficult to work when the tube is buried, and is vulnerable to external impacts from the outside of the corrugated pipe.
본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 합성수지로 형성된 소형관을 이용하여 대형관을 제조하되 중공 소형관을 나선형상으로 감고 그 내,외측 간극에 합성수지를 주입하여 상호 결합시킴으로써 가벼우면서도 강도가 크고 내외면에 요철이 형성되지 않아 매몰시의 작업성이 향상된 합성수지 이중벽 평활관의 제조 방법 및 제조 장치를 제공하는데 그 목적이 있다.The present invention has been made in order to solve the above problems of the prior art, while manufacturing a large tube using a small tube formed of a synthetic resin, while winding a hollow small tube in a spiral shape and injecting the synthetic resin into the inner and outer gaps are coupled to each other It is an object of the present invention to provide a method and apparatus for manufacturing a synthetic resin double wall smooth tube, which is light in weight but high in strength, and irregularities are not formed on the inner and outer surfaces, thereby improving workability at the time of investment.
제1도는 종래의 나선형 주름관의 일부가 도시된 사시도1 is a perspective view showing a part of a conventional spiral corrugated pipe
제2도는 종래의 나선형 주름관 제조 과정이 도시된 단면도2 is a cross-sectional view showing a conventional spiral corrugated pipe manufacturing process
제3도는 다른 형태의 나선형 주름관의 제조 장치가 도시된 사시도3 is a perspective view showing an apparatus for producing a spiral corrugated pipe of another type
제4도는 본 발명에 의하여 제조된 합성수지 이중벽 평활관의 일부가 도시된 사시도4 is a perspective view showing a part of a synthetic double-walled smooth pipe manufactured according to the present invention
제5도는 본 발명에 의하여 제조된 합성수지 이중벽 평활관의 단면도5 is a cross-sectional view of a synthetic resin double wall smooth tube manufactured according to the present invention.
제6도는 본 발명에 의한 합성수지 이중벽 평활관 제조장치가 개략적으로 도시된 구성도6 is a schematic view showing a synthetic resin double wall smooth tube manufacturing apparatus according to the present invention
제7도는 제6도의 횡단면도7 is a cross-sectional view of FIG. 6
제8도는 제6도의 종단면도이다8 is a longitudinal cross-sectional view of FIG.
＊ 도면의 주요부분에 대한 부호의 설명＊ Explanation of symbols on main parts of drawing
50 : 합성수지 이중벽 평활관 51 : 내주면50: synthetic double wall smooth pipe 51: inner peripheral surface
53 : Ⅰ형 빔 54 : 외주면53: type I beam 54: outer peripheral surface
61 : 합성수지 압송기 62 : 수지 저장통61: synthetic resin feeder 62: resin reservoir
63 : 가이드 64 : 회전 롤러63: guide 64: rotary roller
65 : 드럼 67 : 합성수지 주입 노즐65: drum 67: synthetic resin injection nozzle
68 : 전열선 69 : 압착 롤러68: heating wire 69: crimping roller
본 발명에 의하여 제조되는 합성수지 이중벽 평활관은 관을 이루는 합성수지면을 따라 나선형의 중공부가 연속하여 형성되고, 강도가 향상되도록 중공부 사이가 Ⅰ형 빔의 형상으로 형성되며, 중공부를 사이에 두고 내벽과 외벽의 이중벽이 형성된 것을 특징으로 하고, 합성수지 이중벽 평활관 제조 방법은 수지 저장통의 합성수지를 가이드를 따라 공급하면서 냉각시켜 중공 형태의 소형관을 형성하는 단계와, 다수의 회전 롤러가 회전되면서 소형관을 나선관으로 변형시키는 단계와, 나선관의 내측과 외측에 설치된 합성수지 주입 노즐이 나선관의 간극에 합성수지를 주입하고 압착 롤러가 상기 간극에 주입된 합성수지를 압착하여 Ⅰ형 빔이 형성되도록 나선관을 상호 접착시키는 단계와, 나선관의 내/외면 접착 부위에 냉각수를 분사하여 냉각시킴으로써 나선형 중공부를 가진 합성수지 이중벽 평활관을 고형화하는 단계로 구성된 것을 특징으로 하며, 합성수지 이중벽 평활관 제조 장치는 액상의 합성수지를 일정 정도 가열하면서 수지 저장통으로 압송하는 합성수지 압송기와, 수지 저장통의 압출공에 삽입되어 압출공을 통해 빠져 나온 합성수지를 중공 형태의 소형관으로 형성시키는 가이드와, 드럼의 가장자리에 복수개 설치되고 구동 모터에 의해 회전되어 소형관이 일정 간격을 유지하는 연속된 나선 형상을 이루도록 하는 회전 롤러와, 소형관이 이루는 나선관의 내외측에 각각 위치되어 상기 수지 저장통으로부터 공급된 합성수지를 소형관 사이의 간극에 주입하는 합성수지 주입 노즐과, 상기 나선관의 내외면에 각각 설치되어 주입된 합성수지를 압착함으로써 간극 부분이 Ⅰ형 빔을 이루도록 하는 압착 롤러와, 냉각수를 분사하여 소형관을 냉각시키고 나선관을 완전히 고형화시키는 냉각수 분사 노즐로 구성된 것을 특징으로 한다.Synthetic resin double wall smooth tube manufactured by the present invention is a spiral hollow portion is formed continuously along the synthetic resin constituting the pipe, between the hollow portion is formed in the shape of the I-beam so that the strength is improved, the inner wall between the hollow portion Characterized in that the double wall of the outer wall and the outer wall, synthetic resin double wall smooth tube manufacturing method is to supply a synthetic resin of the resin reservoir along the guide to cool to form a small tube of the hollow form, and a plurality of rotating rollers to rotate the small tube Transforming into a spiral tube, and the synthetic resin injection nozzles installed on the inner and outer sides of the spiral tube inject the synthetic resin into the gap of the spiral tube, and the compression roller compresses the synthetic resin injected into the gap to form the I-beam. Bonding each other to each other, and cooling by spraying cooling water on the inner / outer surface bonding portion of the spiral tube. It characterized in that it comprises a step of solidifying the synthetic resin double-walled smooth tube having a spiral hollow portion, the synthetic resin double-walled smooth pipe manufacturing apparatus is a synthetic resin feeder for feeding a liquid synthetic resin to a resin reservoir while heating to a certain degree, in the extrusion hole of the resin reservoir A guide inserted to form a synthetic resin hollow tube inserted through the extruded hole and a plurality of rotors installed at the edge of the drum and rotated by a driving motor to form a continuous spiral shape in which the small tubes maintain a constant distance; Synthetic resin injection nozzles respectively positioned on the inner and outer sides of the spiral tube formed by the roller and the small tube and injecting the synthetic resin supplied from the resin reservoir into the gap between the small tubes, and synthetic resins respectively installed and injected on the inner and outer surfaces of the spiral tube. By pressing the gap part Compression rollers to achieve, and a cooling water injection nozzle for cooling the small pipe by spraying the cooling water and solidifying the spiral tube completely.
이하, 본 발명의 실시 예를 첨부된 도면을 참조하여 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명에 의하여 제조되는 합성수지 이중벽 평활관(50)은 제4도 및 제5도에 도시된 바와 같이 중공부(52)가 형성된 소형관(49)이 길이방향으로 연속하여 배열되고, 상기 소형관(49)의 내,외측의 간극 사이에 합성수지 접착층(53a)(53b)이 형성되며, 내,외주면(51)(54)이 평활하게 형성되고 상기 소형관(49)의 중공부(52)들 사이에 Ⅰ빔이 형성된다.Synthetic resin double-walled smooth pipe (50) manufactured by the present invention is a small pipe 49 having a hollow portion 52 is formed continuously arranged in the longitudinal direction as shown in FIGS. 4 and 5 A synthetic resin adhesive layer (53a, 53b) is formed between the inner and outer gaps of the 49, the inner and outer peripheral surfaces (51) and (54) are smoothly formed, and the hollow portions (52) of the small pipe (49). An I beam is formed in between.
상기한 합성수지 이중벽 평활관을 제조하는 본 발명의 합성수지 이중벽 평활관 제조 장치는 제6도내지 제8도에 도시된 바와 같이 액상의 합성수지를 일정 정도 가열하면서 수지 저장통(62)으로 압송하는 합성수지 압송기(61)와, 수지 저장통(62)의 압출공(62')에 삽입되어 압출공(62`)을 통해 빠져 나온 합성수지를 중공의 원형단면을 갖는 소형관(49)으로 형성시키는 가이드(63)와, 드럼(65)의 가장자리에 복수개 설치되고 구동 모터(66)에 의해 각각 회전되어 소형관(49)이 일정 간격을 유지하면서 나선상으로 감겨지는 회전 롤러(64)로 구성된다.Synthetic resin double-walled smooth pipe manufacturing apparatus of the present invention for producing the synthetic resin double-walled smooth pipe is a synthetic resin feeder for feeding a liquid synthetic resin to a resin reservoir (62) while heating a certain amount of the synthetic resin as shown in FIGS. (61) and a guide (63) which is inserted into the extruded hole (62 ') of the resin reservoir (62) and formed into a small pipe (49) having a hollow circular cross section, and the synthetic resin exited through the extruded hole (62'). And a rotating roller 64 which is provided on the edge of the drum 65 and is rotated by the drive motor 66 so that the small pipe 49 is wound in a spiral while maintaining a constant interval.
또한, 소형관(49)이 이루는 나선관의 내외측의 간극에 각각 위치되어 상기 수지 저장통(62)으로부터 공급된 합성수지를 소형관(49) 사이의 간극에 주입하는 합성수지 주입 노즐(67)과, 상기 합성수지 주입 노즐(67)의 외측에 설치되어 합성수지 주입 노즐(67) 내부의 합성수지가 액체 상태를 유지토록 하는 전열선(68)과, 상기 나선관의 내외면에 각각 설치되어 주입된 합성수지를 압착함으로써 간극 부분이 Ⅰ형 빔을 이루도록 하는 압착 롤러(69)와, 냉각수를 분사하여 소형관(49)을 냉각시키고 합성수지 이중벽 평활관(50)을 완전히 고형화시키는 냉각수 분사 노즐(70)이 포함된다.In addition, a synthetic resin injection nozzle 67 which is positioned in the gap between the inner and outer sides of the spiral tube formed by the small tube 49 and injects the synthetic resin supplied from the resin reservoir 62 into the gap between the small tube 49; The heating wire 68 is installed outside the synthetic resin injection nozzle 67 so that the synthetic resin inside the synthetic resin injection nozzle 67 is maintained in a liquid state, and the synthetic resin injected and injected into each of the inner and outer surfaces of the spiral tube is compressed. A compression roller 69 is provided such that the gap portion forms an I-beam, and a coolant spray nozzle 70 that cools the small pipe 49 by spraying coolant and completely solidifies the synthetic double wall smooth tube 50.
상기와 같이 구성된 본 발명의 합성수지 이중벽 평활관 제조 장치는 다음의 과정을 통해 나선형 중공부를 가진 합성수지 이중벽 평활관(50)을 제조하게 된다.Synthetic resin double-walled smooth pipe manufacturing apparatus of the present invention configured as described above is to produce a synthetic resin double-walled smooth pipe 50 having a spiral hollow through the following process.
합성수지 압송기(61)가 액상의 합성수지를 일정 정도 가열하면서 수지 저장통(62)으로 압송하면, 수지 저장통(62)은 압출공(62`)을 통해 합성수지를 압출한다.When the synthetic resin feeder 61 feeds the liquid synthetic resin to the resin reservoir 62 while heating the liquid to some extent, the resin reservoir 62 extrudes the synthetic resin through the extrusion hole 62 ′.
압출된 합성수지는 가이드(63)를 따라 이동되면서 냉각수에 의해 일정 정도 냉각되어 중공 형태의 소형관(49)으로 형성된다.The extruded synthetic resin is cooled to a certain degree by the cooling water while being moved along the guide 63 to form a small tube 49 having a hollow shape.
소형관(49)은 다수의 회전 롤러(64)에 의해 그 외주면들을 따라 일정 간격으로 연속된 나선형을 이루게 되고, 상기 소형관(49)으로 이루어진 나선관의 내측과The small tube 49 is formed in a continuous spiral at regular intervals along its outer circumferential surface by a plurality of rotating rollers 64, and the inner side of the spiral tube made of the small tube 49
외측에 설치된 합성수지 주입 노즐(67)이 나선관의 간극 내외면에 합성수지를 각각 주입한다.Synthetic resin injection nozzles 67 provided on the outside inject synthetic resin into the inner and outer surfaces of the spiral tube.
나선관의 간극에 합성수지(53a)(53b)가 주입되면 압착 롤러(69)가 주입된 합성수지(53a)(53b)를 상하 방향으로 압착하여 Ⅰ형 빔(53)이 형성되도록 나선관을 상호 접착시키게 된다. 나선관이 상호 접착될 때 압착 롤러(69)가 접착 부위를 강하게 압착하므로 내/외주면(51)(54)이 평활하게 되어 합성수지 이중벽 평활관(50)이 형성된다.When synthetic resins 53a and 53b are injected into the gap between the spiral pipes, the synthetic pipes 53a and 53b into which the pressing roller 69 is injected are pressed in the vertical direction to bond the spiral pipes together to form the I-beam 53. Let's go. When the spiral pipes are bonded to each other, the pressing roller 69 strongly compresses the bonding portion, so that the inner / outer peripheral surfaces 51 and 54 are smoothed to form the synthetic resin double wall smooth pipe 50.
이후, 냉각수 분사 노즐(70)이 합성수지 이중벽 평활관의 내/외면 합성수지 접착층(53a)(53b)에 냉각수를 분사하여 냉각시킴으로써 나선형 중공부(52)를 가진 합성수지 이중벽 평활관(50)을 고형화한다.Thereafter, the cooling water spray nozzle 70 solidifies the synthetic resin double wall smooth tube 50 having the spiral hollow portion 52 by cooling the sprayed water to the inner / outer synthetic resin adhesive layers 53a and 53b of the synthetic resin double wall smooth tube. .
상기한 과정을 통해 제조된 합성수지 이중벽 평활관(50)은 그 외면에 요철이 형성되지 않게 되고, 소형관(49)의 연결 부분이 Ⅰ형 빔(53)으로 형성되며, 그 단면이 중공부(52)를 사이에 두고 내주면(51)과 외주면(54)의 이중벽으로 형성되므로 그 강도가 매우 커지게 된다.Synthetic resin double-walled smooth pipe 50 manufactured through the above process is not formed with irregularities on the outer surface, the connecting portion of the small pipe 49 is formed of the I-type beam 53, the cross section of the hollow portion ( 52 is formed between the inner circumferential surface 51 and the outer circumferential surface 54 with a double wall therebetween, the strength becomes very large.
합성수지 이중벽 평활관(50)이 이중벽을 가지게 될 경우 외주면(54) 또는 내주면(51) 중 어느 일측이 손상되더라도 다른 일측이 합성수지 이중벽 평활관(50) 내부의 유동물이 외부로 누설되지 않도록 하게 되므로 외부 충격에 대한 방어력이 커지게 된다.When the synthetic double wall smooth tube 50 has a double wall, even if one side of the outer circumferential surface 54 or the inner circumferential surface 51 is damaged, the other side prevents the flow of the inside of the synthetic double wall smooth tube 50 from leaking to the outside. Increased defense against external shocks.
이와같이, 본 발명에 의하여 제조된 합성수지 이중벽 평활관은 내/외부 이중으로 평활하게 형성되어 외주면에 요철이 없으므로 매몰 작업이 용이하고 소형관의 연결 부위가 Ⅰ형 빔의 형상으로 형성되고 이중벽을 이루고 있으므로 그 강도가 매우 커져 끊기거나 부러지지 않는 이점이 있다.As described above, the synthetic resin double wall smooth tube manufactured according to the present invention is smoothly formed in the inner / external double, so there is no irregularities on the outer circumferential surface, so that the investment is easy and the connection part of the small tube is formed in the shape of the I-type beam and forms the double wall Its strength is so great that it does not break or break.
또한, 본 발명의 합성수지 이중벽 평활관 제조 방법 및 제조 장치는 외주면에 요철이 형성되지 않고 강도가 강한 합성수지 이중벽 평활관을 연속적으로 제조할 수 있고, 냉각수를 분사하여 합성수지 이중벽 평활관을 고형화하므로 제작된 합성수지 이중벽 평활관을 신속히 냉각시켜 제조시의 변형을 방지할 수 있는 이점이 있다.In addition, the synthetic resin double wall smooth tube manufacturing method and apparatus of the present invention can continuously manufacture a double-walled smooth tube of strong strength without forming irregularities on the outer circumferential surface, and is produced by solidifying the synthetic resin double wall smooth tube by spraying cooling water The synthetic resin double wall smooth tube can be cooled quickly to prevent deformation during manufacturing.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930017640A KR0136249B1 (en) | 1993-09-03 | 1993-09-03 | Method for the production of double wall panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930017640A KR0136249B1 (en) | 1993-09-03 | 1993-09-03 | Method for the production of double wall panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950007982A KR950007982A (en) | 1995-04-15 |
| KR0136249B1 true KR0136249B1 (en) | 1998-04-11 |
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ID=19362844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019930017640A KR0136249B1 (en) | 1993-09-03 | 1993-09-03 | Method for the production of double wall panel |
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| Country | Link |
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| KR (1) | KR0136249B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990064616A (en) * | 1999-04-17 | 1999-08-05 | 정우현 | Joining method for high stiffness Spiral pipe |
| KR100292274B1 (en) * | 1998-12-14 | 2001-06-01 | 정우현 | Spinal pipe made from plastic wastes and molding device thereof |
| KR100352997B1 (en) * | 2000-04-17 | 2002-09-18 | 우명남 | Spiral pipe using waste plastic material and manufacturing apparatus thereof |
| KR100496550B1 (en) * | 2002-05-07 | 2005-07-01 | 손삼수 | Method for making pipe with hollow and equipment of making the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100278849B1 (en) * | 1998-07-22 | 2001-02-01 | 김인식 | Synthetic Resin Spiral Hollow Tube with Reinforcement Layer and Manufacturing Method |
| KR20160076697A (en) | 2014-12-23 | 2016-07-01 | 박철희 | Wheel braking device |
-
1993
- 1993-09-03 KR KR1019930017640A patent/KR0136249B1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100292274B1 (en) * | 1998-12-14 | 2001-06-01 | 정우현 | Spinal pipe made from plastic wastes and molding device thereof |
| KR19990064616A (en) * | 1999-04-17 | 1999-08-05 | 정우현 | Joining method for high stiffness Spiral pipe |
| KR100352997B1 (en) * | 2000-04-17 | 2002-09-18 | 우명남 | Spiral pipe using waste plastic material and manufacturing apparatus thereof |
| KR100496550B1 (en) * | 2002-05-07 | 2005-07-01 | 손삼수 | Method for making pipe with hollow and equipment of making the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR950007982A (en) | 1995-04-15 |
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