KR20040065779A - Pultrusion pipe using stitch mat of reinforced fiber glass and manufacturing method thereof - Google Patents
Pultrusion pipe using stitch mat of reinforced fiber glass and manufacturing method thereof Download PDFInfo
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- KR20040065779A KR20040065779A KR1020030002947A KR20030002947A KR20040065779A KR 20040065779 A KR20040065779 A KR 20040065779A KR 1020030002947 A KR1020030002947 A KR 1020030002947A KR 20030002947 A KR20030002947 A KR 20030002947A KR 20040065779 A KR20040065779 A KR 20040065779A
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- mat
- stitch
- roving
- stitch mat
- compound
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
- B29C70/528—Heating or cooling
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings
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- 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)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- General Engineering & Computer Science (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
본 발명은 토목공사시 지반의 강도를 강화하기 위하여 실시하는 그라우팅에 사용되는 그라우팅용 파이프에 관한 것으로서, 강화유리섬유인 스티치매트를 이용한 인발성형 파이프와 그 제작방법에 관한 것으로서, 강화유리섬유로 제작된 스티치 매트를 여러겹으로 하고 중간에 수지와 혼화재로 이루어진 컴파운드가 함침된 로빙을 포함시켜 전체적으로 수지와 혼화재로 이루어진 컴파운드에 의해 스티치 매트와 로빙이 일체화 함침되도록하여 인발성형 제작된 인발성형 파이프로서, 이의 제작에는 맨드레일에 스티치 매트를 설치하고 제1포밍 가이드에 컴파운드가 함침된 로밍이 스티치 매트에 접착되도록 한 후에 이어서 제 2포밍 가이드에 컴파운드가 함침된 로밍이 다른 스티치 매트에 접착되도록 한 후에 제 3포밍 가이드에서 또 다른 스티치 매트를 겹쳐지게 한 후에 히티드 다이에서 일정한 열을 가하여 컴파운드가 스티치 매트와 로빙이 모두 함침되도록 한 후에 냉각하고 일정한 길이로 잘라 인발성형 파이프를 제작하는 것이다.The present invention relates to a grouting pipe used for grouting to reinforce the ground strength in civil engineering, and to a pulled pipe using a stitch mat, which is a reinforced glass fiber, and a method for manufacturing the same. A pull-out pipe manufactured by drawing and forming a plurality of layers of stitched mat and including a roving impregnated with a compound made of resin and a mixed material so that the stitch mat and roving are integrally impregnated with a compound made of a resin and a mixed material as a whole. Its fabrication involves the installation of a stitching mat on the manrail and the roaming with the compound impregnated in the first forming guide being adhered to the stitching mat, followed by the roaming with the compound impregnated in the second forming guide being bonded to the other stitching mat. Another stitching mat from the forming guide After overlapping, apply heat to the heated die so that the compound is impregnated with both the stitching mat and the roving, and then cool and cut to length to make the drawn pipe.
본 발명은 강화유리섬유인 스티치 매트를 여러겹으로 층을 이루게하고 그사이에 수지와 혼화재로 이루어진 컴파운드에 함침된 로빙을 길이방향으로 설치하여 스티치 매트와 로빙을 수지와 혼화재로 이루어진 컴파운드를 매개로 하여 상호 부착되도록 하여 수직하중 및 파이프 내부에 작용하는 압력에도 견딜수 있도록 강도를 향상시켜 압력이 작용하는 압력관으로서 지중의 그라우팅 작업에 사용하는 그라우팅용 관에도 적용할 수 있으며, 건축 및 토목용 재료등 모든 분야에 포괄적으로 사용할 수 있으며, 경량이면서 전기 절연성이 높으며, 전파의 투과성이 향상된 제품으로서 제품의 사용분야를 무한대로 확장할 수 있는 다목적이면서 사용 효율성이 높은 제품을 제작하기 위함이다.The present invention is to form a layer of a layer of stitched glass fiber reinforcement in multiple layers and between the length of the roving impregnated in the compound made of resin and admixtures in the longitudinal direction by using the compound made of resin and admixtures It is a pressure pipe that acts as a pressure pipe by increasing its strength to withstand vertical loads and pressures inside the pipe, and can be applied to grouting pipes used for grouting work in the ground. It is a product that can be used comprehensively, is lightweight, has high electric insulation, and improves the transmission of radio waves.
종래에는 유리섬유가 직교하는 형태로 제작한 매트를 이용하여 제품을 제작하여 사용하므로서 수직하중 및 내부의 압력에도 견디지 못하는 되어 많은 문제점이 상존하여 왔으며, 또 다른 방법으로는 일방향으로 제작된 스티치 매트를 사용하여 제품을 제작하였으나 이 또한 방향성이 없게 되어 수직하중에 취약점이 노출되어 강도가 요구되는 시설에는 사용할 수 없는 단점이 있다.Conventionally, many problems have existed since the product is manufactured using a mat made of a glass fiber orthogonal to form a product, and it cannot withstand vertical loads and internal pressures. Although the product is manufactured using this method, it also has no directivity, and thus has weaknesses exposed to vertical loads and thus cannot be used in facilities requiring strength.
따라서, 상기와 같은 문제점을 해결하기 위하여 제안된 것으로서, 본 발명은 유리섬유를 양쪽의 45˚ 방향으로 서로 직교하도록 하고 직교점에 수직의 유리섬유를 교차하도록 하는 방법으로 3개층으로 직조한 강화유리섬유인 스티치 매트를 3겹의 층으로 하고 그사이에 수지와 혼화재로 이루어진 컴파운드를 함침시킨 로빙을 포함하도록하여 가열시켜 로빙과 스티치 매트가 컴파운드에 의해 일체화되게 제작한 인발성형 파이프에 관한 것으로서, 이렇게 제작된 파이프는 수직하중 및 내압에도 견딜 수 있을 정도의 강도를 가지며, 내한성, 내열성, 전파투과성이 매우 높으며 경량의 제품인 관계로 전산업분야에 포괄적으로 사용할 수 있는 제품을 생산하기 위한 제작기술을 제공하는데 있다.Therefore, as proposed in order to solve the above problems, the present invention is to strengthen the glass woven in three layers in a manner to cross the glass fibers perpendicular to each other in the 45 ° direction of both sides and perpendicular to the perpendicular point This invention relates to a pull-out pipe manufactured by incorporating a roving and a stitch mat into a compound by heating the fiber to include a stitching mat made of three layers and impregnating a compound composed of a resin and a mixed material therebetween. The pipes are strong enough to withstand vertical loads and pressures, and are very light-resistant, heat-resistant, and radio-transmissive. They are lightweight and provide a manufacturing technology for producing products that can be used in all industries. have.
도 1은 본 발명의 스티치 매트를 이용한 인발성형 파이프의 단면을 보여주는 도면.1 is a view showing a cross section of a pulled pipe using the stitch mat of the present invention.
도 2는 본 발명의 스티치 매트 제조방법을 보여주는 도면.Figure 2 is a view showing a stitch mat manufacturing method of the present invention.
도 3은 본 발명의 인발성형 파이프를 제작하는 과정을 보여주는 도면.Figure 3 is a view showing a process for manufacturing a pull-out pipe of the present invention.
도 4는 본 발명의 인발성형 파이프 제작과정을 보여주는 흐름도.Figure 4 is a flow chart showing the process of manufacturing the drawn pipe of the present invention.
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
10... 유리섬유 20... 스티치 매트10 ... fiberglass 20 ... stitch mat
30... 로빙 40... 인발성형 파이프30 ... roving 40 ... drawing pipe
50... 맨드레일 60... 제1포밍 가이드50 ... Manrail 60 ... First Forming Guide
70... 제 2포밍가이드 80... 히티드 다이70. Second Forming Guide 80 ... Heated Die
90... 제 3포밍가이드90 ... Third Forming Guide
본 발명은 유리섬유를 양쪽의 45˚ 방향으로 서로 직교하도록 하고 직교점에 수직방향으로 유리섬유를 교차하도록 하는 방법으로 3개층으로 직조한 강화유리섬유인 스티치 매트를 제작하고, 맨드레일에 상기의 스티치 매트를 설치하고, 제1포밍 가이드에 수지와 혼화재로 이루어진 컴파운드가 함침된 로밍이 스티치 매트에 접착되도록 한 후에 이어서 제 2포밍 가이드에 컴파운드가 함침된 로밍이 스티치 매트에 접착되도록 하고, 제 3포밍 가이드를 통과하도록 한 후에 히티드 다이에서 60 ~ 170℃의 일정한 열을 가하여 수지와 혼화재로 이루어진 컴파운드가 스티치 매트 전체에 함침되도록 한 후에 냉각하고 일정한 길이로 잘라 인발성형 파이프를 제작하는 것이다.The present invention is to produce a stitch mat of reinforced glass fibers woven in three layers in a manner to orthogonal to each other in the 45 degree direction of the glass fibers and to cross the glass fibers in the perpendicular direction to the orthogonal point, and the above The stitch mat is installed, and the roaming impregnated with the compound of resin and admixture in the first forming guide is adhered to the stitch mat, and then the roaming impregnated with the compound in the second forming guide is adhered to the stitch mat, and the third After passing through the forming guide, a constant heat of 60 to 170 ° C. is applied on the heated die so that the compound of resin and admixture is impregnated to the entirety of the stitch mat, and then cooled and cut to a constant length to produce a drawn pipe.
이하, 본 발명의 구성 및 작용을 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, the configuration and operation of the present invention will be described in detail by the accompanying drawings.
도 1은 본 발명의 스티치 매트를 이용한 인발성형 파이프의 단면을 보여주는 도면으로서 3개층의 스티치 매트사이에 수지와 혼화재로 이루어진 컴파운드에 함침된 로빙을 각각의 층에 설치하고 열을 가하여 스티치 매트와 로빙이 수지와 혼화재로 이루어진 컴파운드를 매개로하여 일체화되게 하여 이를 인발성형 파이프로 제작한 것이다.1 is a view showing a cross-sectional view of a drawn pipe using a stitch mat of the present invention is installed between the three layers of the mat and the compound impregnated roving impregnated with a compound of resin and admixture in each layer and applying heat to the stitch mat and roving It is made of a pull-out pipe by integrating it with a compound made of this resin and a mixed material.
스티치 매트와 로빙을 일체로 하기 위하여 접착제 역할을 하는 수지와 혼화재로 이루어진 컴파운드는 수지와 열가소성 첨가제와 무기질 충진제와 금형에서 쉽게 박리될 수 있게 하는 내부 이형제와 열을 가할 시 경화가 쉽게 이뤄지게 하는유기과산물과 안료를 섞어 제조한 것으로서, 이러한 컴파운드 35중량%와 유리섬유 강화재인 스티치 매트와 로빙 65중량%가 되도록 로빙에 컴파운드를 함침시켜 제작하는 것이다.Compounds composed of resins and admixtures that act as adhesives to unite stitch mats and rovings are resins, thermoplastic additives, inorganic fillers and internal releases that can be easily peeled from the mold, and organic peroxides that cure easily upon application of heat. It is prepared by mixing the pigment, and the compound is produced by impregnating the compound so that the 35% by weight of the compound and the glass fiber reinforcement stitch mat and 65% by weight of the roving.
전체적으로 유리섬유 강화재인 스티치 매트와 로빙을 65중량%, 수지 27.9중량%, 열가소성 첨가제 0.2중량%, 무기질 충진제 5.6중량%, 내부이형제 0.3중량%, 유기과산물 0.3중량%, 안료 0.7중량%가 되도록 하여 인발성형 파이프를 성형제작하는 것이다.Overall, the fiberglass reinforcement stitch mat and roving are 65% by weight, resin 27.9% by weight, thermoplastic additives 0.2% by weight, inorganic filler 5.6% by weight, internal release agent 0.3% by weight, organic peroxide 0.3% by weight and pigment 0.7% by weight. It is to make a drawing pipe.
이렇게 스티치 매트의 사이에 함침된 로빙을 길이방향으로 설치하여 제작한 인발성형 파이프는 도 2에서 설명되는 스티치 매트 제조방법에 의해 유리섬유를 양쪽방향 45도 각도에서 교차되게 하고 교차되는 곳에 수직방향의 유리섬유를 설치하는 방법으로 3겹으로 직조한 스티치 매트로서 이렇게 직조한 것은 수직하중에 적절히 대응할 수 있는 강도가 발생되며 또한, 스티치 매트 사이에 컴파운드에 함침된 로빙을 파이프의 길이방향으로 설치하여 일체로 제작하면 로빙은 유리섬유가닥을 스티치 매트에 길이 방향으로 설치하게되므로서 스티치 매트와 일체로 되어 내부의 압력에 견딜 수 있는 내압력을 갖게되는 것이다.The drawing pipe manufactured by installing the roving impregnated between the stitch mats in the longitudinal direction is made to cross the glass fibers at a 45 degree angle in both directions by the stitch mat manufacturing method described in FIG. The three-ply weaving mat is a method of installing glass fiber, and this weaving produces strength that can cope with the vertical load, and the rovings impregnated in the compound between the stitch mats are installed in the longitudinal direction of the pipe. When fabricated with roving, the fiberglass strands are installed in the stitch mat in the longitudinal direction, so that they are integrated with the stitch mat and have internal pressure to withstand the pressure inside.
이러한 방법으로 제작한 제품은 전기 절연성이 우수해서 대용량의 송,배전의 보호관에도 사용이 가능하며, 수직하중과 내부 압력에도 견딜수 있으므로 압력관인 그라우팅 관으로 사용이 가능하고, 전파의 투과성이 양호하여 전파의 방해를 받지 않아야 할 장소의 구조물에 사용할 수도 있다. 이러한 장점외에도 내식성과 내열성으로서 열전도율에서 알루미늄의 1/250, 철강의 1/60이며, 경량성에서도 철강의20%, 알루미늄의 60%의 무게에 해당하며, -50 ~ 120℃의 광범위한 온도에서도 변형이 없어 그 사용범위는 무제한 인 것이다.Products manufactured in this way are excellent in electrical insulation and can be used for large-capacity transmission and distribution protection pipes, and can withstand vertical loads and internal pressures, making them suitable for use as grouting pipes as pressure tubes. It can also be used on structures in places where they will not be obstructed. In addition to these advantages, corrosion resistance and heat resistance are 1/250 of aluminum and 1/60 of steel in thermal conductivity, 20% of steel and 60% of aluminum in light weight, and deformable at a wide range of temperatures from -50 to 120 ℃. The scope of use is unlimited.
도 2는 본 발명의 스티치 매트 제조방법을 보여주는 도면으로서 유리섬유를 양쪽방향 45도 각도에서 교차되게 하고 교차되는 곳에 수직의 유리섬유를 설치하는 방법으로 3겹으로 직조한 스티치 매트이다.Figure 2 is a view showing a stitch mat manufacturing method of the present invention is a stitch mat woven in three layers by a method of intersecting the glass fibers at an angle of 45 degrees in both directions and installing the vertical glass fibers at the intersections.
도 3과 도 4는 본 발명의 인발성형 파이프를 제작하는 과정과 흐름을 보여주는 도면으로서 스티치 매트를 맨드레일에 감아 설치하고 서서히 컴파운드에 함침된 로빙이 스티치 매트상에 겹쳐지게하기 위한 제1포밍 가이드에 진입하도록 하여 스티치 매트에 로빙이 부착되도록 하고, 그 위에 다른 스티치 매트를 제 2포밍 가이드에 진입하도록 하되 컴파운드에 함침된 로빙이 스티치 매트에 부착되도록 한 후에 다른 스티치 매트를 제3포밍 가이드에 진입하여 완전히 일체화되도록 한 후에 히티드 다이에 진입시켜 60 ~ 170℃의 열을 가하여 컴파운드가 완전히 스티치 매트에 함침되도록 한 후에 이를 냉각시키고 난 후에 일정한 규격의 길이로 잘라 인발성형 파이프를 제작하는 것이다.3 and 4 is a view showing the process and flow of manufacturing the drawn pipe of the present invention, the first forming guide for installing the stitch mat wound around the mandrail and slowly overlap the roving impregnated in the compound on the stitch mat To allow the roving to adhere to the stitch mat, and to place the other stitch mat on the second forming guide, but to allow the rovings impregnated in the compound to attach to the stitch mat, and then to enter the third forming guide. After it is completely integrated, heat is applied to the heated die to apply heat of 60 to 170 ° C. so that the compound is completely impregnated into the stitch mat, and then cooled, and then cut to a certain size to produce a drawn pipe.
본 도에서 설명한 컴파운드는 도 1에서 설명하여 본 도에서는 생략한다.Compounds described in this drawing are described in FIG. 1 and are omitted in this drawing.
본 발명은 유리섬유를 일정한 층으로 형성시킨 후에 층사이에 파이프의 길이방향으로 수지에 함침된 로빙을 설치하여 스티치 매트와 로빙이 수지에 의해 완전히 일체화되게 제조하여 인발성형 파이프를 제작하는 방법에 관한 것으로서 이렇게제작된 파이프는 수직 및 내압에 강하게 저항하는 강도를 가고 있으며, 내식성 ,내열성, 내한성 및 전파투과성도 양호하여 본 제품의 사용범위가 거의 무제한으로 사용할 수 있는 아주 경제성인 제품을 제공하는데 있다.The present invention relates to a method for manufacturing a pulled pipe by forming a glass fiber in a certain layer and then installing a roving impregnated in the resin in the longitudinal direction of the pipe between the layers to make the stitch mat and the roving completely integrated by the resin. As the pipes manufactured as described above have strong strength against vertical and pressure resistance, and have good corrosion resistance, heat resistance, cold resistance, and radio wave permeability, thereby providing a very economical product that can be used almost unlimitedly.
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Cited By (4)
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KR100941057B1 (en) * | 2007-12-11 | 2010-02-05 | 주식회사 세운티.엔.에스 | Manufacturing method of binder for glass fiber adiabatic pipe forming |
CN102179945A (en) * | 2011-04-25 | 2011-09-14 | 陈分红 | Production process of large-calibre epoxy glass fiber and braided strap winding extrusion draw pipe |
KR102391081B1 (en) * | 2020-12-31 | 2022-04-27 | 주식회사 케이에스에프아이앤씨 | manufacturing apparatus for glass fiber composite material panel and glass fiber composite material panel manufactured using thereof |
CN115366446A (en) * | 2022-07-29 | 2022-11-22 | 辽宁石油化工大学 | Pultrusion and winding combined manufacturing process and equipment for improving annular rigidity of circular pipe |
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KR101776383B1 (en) | 2015-06-29 | 2017-09-08 | 현대자동차주식회사 | Manufacturing apparatus for composite reinforcement structure and manufacturing method for the same |
KR20230130954A (en) | 2022-03-04 | 2023-09-12 | 김미경 | Apparatus for pultrusion molding of fiber reinforced composites |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100941057B1 (en) * | 2007-12-11 | 2010-02-05 | 주식회사 세운티.엔.에스 | Manufacturing method of binder for glass fiber adiabatic pipe forming |
CN102179945A (en) * | 2011-04-25 | 2011-09-14 | 陈分红 | Production process of large-calibre epoxy glass fiber and braided strap winding extrusion draw pipe |
KR102391081B1 (en) * | 2020-12-31 | 2022-04-27 | 주식회사 케이에스에프아이앤씨 | manufacturing apparatus for glass fiber composite material panel and glass fiber composite material panel manufactured using thereof |
CN115366446A (en) * | 2022-07-29 | 2022-11-22 | 辽宁石油化工大学 | Pultrusion and winding combined manufacturing process and equipment for improving annular rigidity of circular pipe |
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