WO2000061977A1 - A manufacture method and manufacture device of stainless-plastic composite pipe - Google Patents
A manufacture method and manufacture device of stainless-plastic composite pipe Download PDFInfo
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- WO2000061977A1 WO2000061977A1 PCT/CN2000/000080 CN0000080W WO0061977A1 WO 2000061977 A1 WO2000061977 A1 WO 2000061977A1 CN 0000080 W CN0000080 W CN 0000080W WO 0061977 A1 WO0061977 A1 WO 0061977A1
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- plastic
- stainless steel
- pipe
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- composite pipe
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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
Definitions
- the invention relates to a method and equipment for manufacturing a pipe, in particular to a manufacturing method and special equipment for a stainless steel plastic composite pipe, and belongs to the technical field of basic non-cutting processing of metal pipes and production of special products from plastic. It is mainly used for the production of various diameters of composite pipes for gas, solar energy, air conditioning, hot and cold water, chemicals, mechanical equipment and other pipes, stairs and bus handrails, railings, interior decoration and curtain rails.
- the method of producing similar products in the prior art is: After the finished stainless steel pipe and the finished plastic pipe are set together, a drawing sleeve is used to pull the two pipes together using a drawing machine.
- the finished stainless steel pipe has a thicker wall and requires more stainless steel materials. It has low production efficiency and high labor intensity. When drawing, the end of the pipe must be rolled first, and the rolled part must be sawn and discarded after drawing. It is a waste of raw materials and a low yield. Therefore, high production costs and high pipe prices are not conducive to promotion and use.
- the purpose of the present invention is to provide a continuous production on a production line without drawing, saving raw materials, high efficiency, low cost, can be formed by thinner stainless steel strip and then welded into an outer tube, saving stainless steel materials, high yield, Manufacturing method of stainless steel plastic composite pipe convenient for popularization and application.
- Another object of the present invention is to provide a special equipment for implementing the above method, which has the characteristics of high continuous production efficiency.
- a method for manufacturing a stainless steel plastic composite pipe includes the following process steps: feeding of a plastic mixture ⁇ extrusion of a plastic pipe-sizing-cooling-drying, and simultaneously unwinding a stainless steel strip ⁇ Strip butt jointing-storage tape forming, after the above-mentioned dried plastic pipe is coated with an adhesive, the above-mentioned stainless steel tape is wrapped outside the adhesive layer, and then welded-composite sizing-aligning ⁇ testing Diameter-eddy current inspection ⁇ traction-coding-sawing ⁇ turning-polishing-inspection ⁇ finished product packaging.
- a special equipment for manufacturing stainless steel plastic composite pipe which is composed of a mixer, a feeder, and a plastic squeezer.
- the end product produced by the method is extruded from the plastic inner tube to the finished tube packaging is completed by a continuous production line with reasonable design and scientific configuration, so the production efficiency is high and the labor intensity of the workers is low,
- the production cost is low, which is convenient for popularization and application, and because the outer tube covered by the outer layer is welded after being formed by butt jointing with a thinner stainless steel strip, not only can save the expensive stainless steel material, further reduce the cost, Drawing head, high yield, PVC can be used for plastics, PE can also be used, and fluororesin plastics can also be used.
- the product can be used for civil and industrial purposes, and has a wide range of applications.
- the basic idea of the present invention is: after the plastic inner tube is extruded and shaped with an adhesive, a thin stainless steel strip is formed to cover and weld, and then After sizing and polishing, the composite pipe is made.
- the machines and devices used for extruding from plastic pipes to drying, applying adhesives and uncoiling to forming and wrapping stainless steel belts, as well as the machines and meters used for welding from composite pipe packaging to finished products The equipment configuration diagram corresponding to the process flow is installed as a continuous production line.
- a method for manufacturing a stainless steel plastic composite pipe according to the present invention includes the following process steps: extrusion, sizing, cooling, and drying of a plastic pipe for feeding a plastic mixture; At the same time, unwinding of stainless steel strip-butt-joint-storage tape ⁇ forming;
- the special equipment for manufacturing stainless steel plastic composite pipe comprises a mixer 1, a feeder 2, a plastic extruder 3, a vacuum sizing tank 4, a spray water tank 5, a tractor 16, and a dryer.
- 13mmWidth As one of the preferred embodiments of the present invention, is a SJSF-30 stainless steel plastic composite pipe production line and process steps composed of the above equipment: PVC material 342g and a certain amount of binder with a wall thickness of 0. 13mm width 6 ⁇ lm ⁇ 102.5mm SUS-304 stainless steel strip with a weight of 243g.
- the production process is continuous, and the length of the pipe can be set arbitrarily by the sawing machine on the production line.
- the general length is 6m.
- the eddy current flaw detection process steps and the installation position of the flaw detector on the production line can be appropriately changed; 2.
- the model of the production line composed of the above equipment, the types of plastic raw materials, and the specifications of the composite pipe can be changed as appropriate.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A manufacture method and manufacture device of stainless-plastic composite pipe, said method includes extrusion, fixing diameter, cooling, stoving, coating adhesive of plastic pipe, and opening rool, abutting joint, shaping, wrapping up of stainless strip, and welding, fixing diameter, straighten, polish of composite pipe, said devices include the machines that are used from extrusion of plastic pipe to polish composite pipe.
Description
不锈钢塑料复合管的制造方法及专用设备 技术领域 Manufacturing method and special equipment of stainless steel plastic composite pipe
本发明涉及管的制造方法及设备 , 尤其是一种不锈钢塑料复合管的制 造方法及专用设备， 属于金属管的基本无切削加工和用塑料生产特殊制品 的技术领域。 主要用于生产各种直径的复合管材供煤气、 太阳能、 空调、 冷热水、 化工、 机械设备等用的各种管道， 楼梯和公交车扶手、 栏杆、 室 内装修和窗帘滑轨等。 The invention relates to a method and equipment for manufacturing a pipe, in particular to a manufacturing method and special equipment for a stainless steel plastic composite pipe, and belongs to the technical field of basic non-cutting processing of metal pipes and production of special products from plastic. It is mainly used for the production of various diameters of composite pipes for gas, solar energy, air conditioning, hot and cold water, chemicals, mechanical equipment and other pipes, stairs and bus handrails, railings, interior decoration and curtain rails.
发明背景 Background of the invention
在现有技术中生产类似产品的方法是： 用成品不锈钢管与成品塑料管 套装在一起后通过一个拉拔套， 采用拉拔机拉拔将二管复合在一起。 成品 不锈钢管的管壁较厚， 需用较多的不锈钢材， 生产效率低， 劳动强度大， 拉拔时管材端部必须先轧头， 拉拔后再把该轧头部份锯切丟弃， 既浪费原 材料， 成品率又低， 因此， 生产成本高， 管材价格高， 不利于推广使用。 The method of producing similar products in the prior art is: After the finished stainless steel pipe and the finished plastic pipe are set together, a drawing sleeve is used to pull the two pipes together using a drawing machine. The finished stainless steel pipe has a thicker wall and requires more stainless steel materials. It has low production efficiency and high labor intensity. When drawing, the end of the pipe must be rolled first, and the rolled part must be sawn and discarded after drawing. It is a waste of raw materials and a low yield. Therefore, high production costs and high pipe prices are not conducive to promotion and use.
发明内容 Summary of the Invention
本发明的目的在于提供一种不用拉拔， 节省原材料， 用生产线连续生 产， 效率高， 成本低， 可用较薄的不锈钢带成型包复后再焊接成外管， 节 省不锈钢材， 成品率高， 便于推广应用的不锈钢塑料复合管的制造方法。 The purpose of the present invention is to provide a continuous production on a production line without drawing, saving raw materials, high efficiency, low cost, can be formed by thinner stainless steel strip and then welded into an outer tube, saving stainless steel materials, high yield, Manufacturing method of stainless steel plastic composite pipe convenient for popularization and application.
本发明的另一目的是提供一种实施上述方法所使用的专用设备， 它具 有连续生产效率高的特点。 Another object of the present invention is to provide a special equipment for implementing the above method, which has the characteristics of high continuous production efficiency.
本发明的目的是这样实现的： 一种不锈钢塑料复合管的制造方法， 包 括下列工艺步骤： 塑料混料上料→塑料管挤出-定径-冷却-烘干， 与此 同时进行不锈钢带开卷→带材对接—储带 成型， 待上述的烘干后的塑料 管外壁涂粘结剂后即将上述的不锈钢带包复在粘结剂层外， 再经焊接-复 合定径―校直→测径 -涡流探伤→牵引—打码—锯切→翻转—抛光-检验 →成品包装。 The purpose of the present invention is achieved as follows: A method for manufacturing a stainless steel plastic composite pipe includes the following process steps: feeding of a plastic mixture → extrusion of a plastic pipe-sizing-cooling-drying, and simultaneously unwinding a stainless steel strip → Strip butt jointing-storage tape forming, after the above-mentioned dried plastic pipe is coated with an adhesive, the above-mentioned stainless steel tape is wrapped outside the adhesive layer, and then welded-composite sizing-aligning → testing Diameter-eddy current inspection → traction-coding-sawing → turning-polishing-inspection → finished product packaging.
一种制造不锈钢塑料复合管的专用设备， 由混料机、 上料机、 塑料挤
出机、 真空定径水槽、 喷淋水槽、 牵引机 I、 烘干机、 涂胶机、 测径仪 I、 开卷机、 对接机、 储带仓、 焊接平台、 牵引机 II、 校直装置、 锯切机、 翻 转装置、 抛光机、 编码打印机、 测径仪 II和探伤仪构成， 并且它们先按照 混料机一上料机一塑料挤出机一真空定径水槽一喷淋水槽一牵引机 I一烘 干机一涂胶机一测径仪 I的顺序安装成一列， 同时再按开卷机一对接机一 储带仓的顺序安装成另一列， 两列并在一起再共同连接焊接平台后再按照 焊接平台一牵引机 II—校直装置一锯切机一翻转装置一抛光机一编码打印 机， 并在上述焊接平台与牵引机 II之间旁路安装测径仪 II , 在牵引机 II与 校直装置之间旁路安装探伤仪， 这样安装成一奈生产线。 A special equipment for manufacturing stainless steel plastic composite pipe, which is composed of a mixer, a feeder, and a plastic squeezer. Dispenser, vacuum sizing tank, spray tank, tractor I, dryer, gluing machine, caliper I, unwinder, docking machine, storage bin, welding platform, tractor II, straightening device, Sawing machine, turning device, polishing machine, coding printer, caliper II and flaw detector, and they are first according to the mixer-feeder-plastic extruder-vacuum sizing sink-spraying sink-tractor I, a dryer, a gluing machine, and a caliper I are installed in a row. At the same time, they are installed in another row in the order of a unwinder butt-joiner and a tape storage bin. The two rows are connected together and then connected to the welding platform Then according to the welding platform-traction machine II-straightening device-sawing machine-turning device-polishing machine-coding printer, and the caliper II is bypassed between the welding platform and the traction machine II. A flaw detector is installed in the bypass between the straightening devices, so that it is installed in a Yina production line.
本发明的突出优点是： 用本方法所生产的终端产品从塑料内管挤出， 到成品管材包装是用一条设计合理、 配置科学的连续生产线完成的， 因而 生产效率高， 工人劳动强度低， 生产成本低， 便于推广应用， 又由于外层 包复的外管是用较薄的不锈钢带对接成型包复后焊接而成的， 不仅可节省 价格较贵的不锈钢材， 进一步降低造价， 而且不用拉拔头， 成品率高， 塑 料可用 PVC， 也可用 PE, 还可用氟树脂塑料， 原料来源丰富易得。 产品既 可民用， 也可工业用， 应用范围十分广泛。 The outstanding advantages of the present invention are: the end product produced by the method is extruded from the plastic inner tube to the finished tube packaging is completed by a continuous production line with reasonable design and scientific configuration, so the production efficiency is high and the labor intensity of the workers is low, The production cost is low, which is convenient for popularization and application, and because the outer tube covered by the outer layer is welded after being formed by butt jointing with a thinner stainless steel strip, not only can save the expensive stainless steel material, further reduce the cost, Drawing head, high yield, PVC can be used for plastics, PE can also be used, and fluororesin plastics can also be used. The product can be used for civil and industrial purposes, and has a wide range of applications.
实施本发明的方式 Mode of Carrying Out the Invention
下面举出本发明的实施例。 Examples of the present invention are listed below.
根据不锈钢和塑料的物化特性， 针对现有技术中所存在的主要问题， 本发明的基本构思是： 塑料内管挤出定型涂粘结剂后， 由较薄的不锈钢带 成型包复焊接， 再经定径、 抛光等即制成复合管。 并由用于从塑料管挤出 到烘干、 涂粘结剂及从开卷到不锈钢带成型、 包复所需的机器和装置以及 用于从焊接到复合管成品包装的机器、 仪表等按照与工艺流程相适应的设 备配置图安装成连续生产线。 According to the physical and chemical properties of stainless steel and plastic, in view of the main problems existing in the prior art, the basic idea of the present invention is: after the plastic inner tube is extruded and shaped with an adhesive, a thin stainless steel strip is formed to cover and weld, and then After sizing and polishing, the composite pipe is made. The machines and devices used for extruding from plastic pipes to drying, applying adhesives and uncoiling to forming and wrapping stainless steel belts, as well as the machines and meters used for welding from composite pipe packaging to finished products The equipment configuration diagram corresponding to the process flow is installed as a continuous production line.
本发明所述的一种不锈钢塑料复合管的制造方法， 包括下列工艺步骤: 塑料混料上料 塑料管挤出 -定径 -冷却→烘干；
与此同时进行不锈钢带开卷 -带材对接 -储带→成型； A method for manufacturing a stainless steel plastic composite pipe according to the present invention includes the following process steps: extrusion, sizing, cooling, and drying of a plastic pipe for feeding a plastic mixture; At the same time, unwinding of stainless steel strip-butt-joint-storage tape → forming;
待上述的烘干后的塑料管外壁涂粘结剂后即将上述的不锈钢带包复在 粘结剂层外； After the outer wall of the dried plastic pipe is coated with an adhesive, the above-mentioned stainless steel tape is wrapped outside the adhesive layer;
再经悍接→复合定径―校直→测径―涡流探伤—牵引—打码→锯切― 翻转→抛光→检验—成品包装。 And then through the joint → composite sizing-straightening → diameter measurement-eddy current flaw detection-traction-coding → sawing-flipping-polishing-inspection-finished product packaging.
本发明所述的一种制造不锈钢塑料复合管的专用设备， 由混料机 1、 上料机 2、 塑料挤出机 3、 真空定径水槽 4、 喷淋水槽 5、 牵引机 1 6、 烘干 机 7、 涂胶机 8、 测径仪 19、 开卷机 10、 对接机 11、 储带仓 12、 焊接平台 13、 牵引机 1114、 校直装置 15、 锯切机 16、 翻转装置 17、 抛光机 18、 编 码打印机 19、 测径仪 Π20和探伤仪 21构成， 并且它们先按照 1→2→3→4 →5→6→1→^→9的顺序安装成一列， 同时再按 10—11— 12的顺序安装成 另一列， 两列并在一起再共同连接 13后再按照 13— 14— 15→16→17→18→ 19, 并在上述 13与 14之间旁路安装 20， 在 14与 15之间旁路安装 21, 这 样安装成一条生产线。 The special equipment for manufacturing stainless steel plastic composite pipe according to the present invention comprises a mixer 1, a feeder 2, a plastic extruder 3, a vacuum sizing tank 4, a spray water tank 5, a tractor 16, and a dryer. Dryer 7, gluing machine 8, caliper 19, uncoiler 10, docking machine 11, storage bin 12, welding platform 13, tractor 1114, straightening device 15, sawing machine 16, turning device 17, polishing Machine 18, coding printer 19, caliper Π20 and flaw detector 21, and they are installed in a row in the order of 1 → 2 → 3 → 4 → 5 → 6 → 1 → ^ → 9, and then press 10-11 — 12 is installed in another row in order. Two rows are connected together and then connected together. Then 13 — 14 — 15 → 16 → 17 → 18 → 19, and a bypass installation of 20 between 13 and 14 above. Bypass 21 to 15 is installed, so that it is installed into a production line.
作为本发明的最佳实施例之一， 是用上述设备组成的 SJSF- 30型不锈 钢塑料复合管生产线和工艺步骤生产管材： 用 PVC材料 342g和一定量的粘 结剂与壁厚 0. 13mm宽 102. 5mm重量 243g的 SUS-304不锈钢带制得合成 Φ32χ1. 6管材 lm。.生产过程是连续的， 管材长度可任意设置由生产线上 锯切机在线锯切， 一般长度为 6m。 13mmWidth As one of the preferred embodiments of the present invention, is a SJSF-30 stainless steel plastic composite pipe production line and process steps composed of the above equipment: PVC material 342g and a certain amount of binder with a wall thickness of 0. 13mm width 6 管材 lm。 102.5mm SUS-304 stainless steel strip with a weight of 243g. The production process is continuous, and the length of the pipe can be set arbitrarily by the sawing machine on the production line. The general length is 6m.
作为本实施例的变更： As a change of this embodiment:
1、 涡流探伤工艺步骤及探伤仪在生产线上的安装位置可以适当变更； 2、 由上述设备所组成的生产线的型号、 塑料原材料种类、 复合管的规 格等均可适当变更。
1. The eddy current flaw detection process steps and the installation position of the flaw detector on the production line can be appropriately changed; 2. The model of the production line composed of the above equipment, the types of plastic raw materials, and the specifications of the composite pipe can be changed as appropriate.
Claims
1、 一种不锈钢塑料复合管的制造方法， 其特征在于该方法包括下列工 艺步骤： 塑料混料上料—塑料管挤出→定径 -冷却→烘干， 与此同时进行 不锈钢带开卷→带材对接→储带→成型， 待上述的烘干后的塑料管外壁涂 粘结剂后即将上述的不锈钢带包复在粘结剂层外， 再经焊接 -复合定径— 校直→测径→涡流探伤—牵引→打码→锯切—翻转—抛光→检验—成品包 装。 1. A method for manufacturing a stainless steel plastic composite pipe, which is characterized in that the method includes the following process steps: feeding of plastic mixture-extrusion of plastic pipe → sizing-cooling → drying; Material docking → storage tape → molding, after the above-mentioned dried plastic pipe is coated with an adhesive, the above-mentioned stainless steel tape is wrapped outside the adhesive layer, and then welded-composite sizing-straightening-calibrating → Eddy current testing—traction → coding → saw cutting—flipping—polishing → inspection—finished product packaging.
2、 一种制造不锈钢塑料复合管的专用设备， 其特征在于该专用设备由 混料机（ 1 ) 、 上料机（ 2 ) 、 塑料挤出机（ 3 ) 、 真空定径水槽 （ 4 ) 、 喷 淋水槽（ 5 )、 牵引机 I ( 6 )、 烘干机（ 7 ) 、 涂胶机（ 8 ) 、 测径仪 1 ( 9) 、 开卷机（10) 、 对接机（11) 、 储带仓（12) 、 焊接平台 （13) 、 牵引机 卫 （ 14 )、 校直装置（ 15 )、 锯切机（ 16 )、翻转装置（ 17 )、 抛光机（ 18 )、 编码打印机（19) 、 测径仪 Π ( 20) 和探伤仪（21 ) 构成， 并且它们先按 照 （ 1 ) → ( 2 ) → ( 3 ) ■→ ( 4 ) → ( 5 ) → ( 6 ) ( 7 ) → ( 8 ) — ( 9 ) 的 顺序安装成一列， 同时再按（10) → ( 11 ) → ( 12) 的顺序安装成另一列， 两列并在一起再共同连接（13)后再按照 （13) → ( 14) → ( 15 ) → ( 16) → ( 17) - ( 18) → ( 19) , 并在上述（13)与 （14)之间旁路安装（20) , 在 （14) 与 （15)之间旁路安装（21 ) , 这样安装成一条生产线。
2. A special equipment for manufacturing stainless steel plastic composite pipe, which is characterized in that the special equipment consists of a mixer (1), a feeder (2), a plastic extruder (3), a vacuum sizing tank (4), Spray water tank (5), tractor I (6), dryer (7), gluing machine (8), caliper 1 (9), unwinder (10), docking machine (11), storage belt Warehouse (12), welding platform (13), traction machine guard (14), straightening device (15), sawing machine (16), turning device (17), polishing machine (18), encoding printer (19), The caliper Π (20) and the flaw detector (21) are composed, and they first follow (1) → (2) → (3) ■ → (4) → (5) → (6) (7) → (8) — Installed in a row in the order of (9), and then installed in another row in the order of (10) → (11) → (12), the two rows are connected together and then connected together (13) and then follow (13) → ( 14) → (15) → (16) → (17)-(18) → (19), and bypass installation (20) between (13) and (14) above, between (14) and (15) Bypass installation (21), so installed into a production line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU36543/00A AU3654300A (en) | 1999-04-07 | 2000-04-06 | A manufacture method and manufacture device of stainless-plastic composite pipe |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99112157.0 | 1999-04-07 | ||
| CN 99112157 CN1242296A (en) | 1999-04-07 | 1999-04-07 | Method and equipment specially for mfg. stainless steel plastic composite tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000061977A1 true WO2000061977A1 (en) | 2000-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2000/000080 WO2000061977A1 (en) | 1999-04-07 | 2000-04-06 | A manufacture method and manufacture device of stainless-plastic composite pipe |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1242296A (en) |
| AU (1) | AU3654300A (en) |
| WO (1) | WO2000061977A1 (en) |
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|---|---|---|---|---|
| WO2012113862A2 (en) | 2011-02-24 | 2012-08-30 | Uponor Innovation Ab | Making pipe for liquid conveyance |
| CN103950170A (en) * | 2014-05-07 | 2014-07-30 | 张家港市维达纺织机械有限公司 | Continuous production device of three-layer plastic-coated metal pipes |
| CN113211107A (en) * | 2021-04-19 | 2021-08-06 | 浙江锯力煌锯床股份有限公司 | Automatic saw cutting production line |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888958A (en) * | 2011-07-21 | 2013-01-23 | 游礼福 | Pipe frame structure |
| CN108759175A (en) * | 2018-04-11 | 2018-11-06 | 浙江康盛股份有限公司 | Cooling anti-corrosion organic coating pipe of one kind and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133229A (en) * | 1995-04-12 | 1996-10-16 | 周德海 | polyvinyl chloride antistatic plastic pipe and manufacturing method thereof |
| CN2273798Y (en) * | 1996-09-15 | 1998-02-04 | 何甜灶 | Stainless-steel composite tubular products |
| CN1217444A (en) * | 1997-11-18 | 1999-05-26 | 阎金波 | Wound type steel-plastic composite pipeline material |
-
1999
- 1999-04-07 CN CN 99112157 patent/CN1242296A/en active Pending
-
2000
- 2000-04-06 WO PCT/CN2000/000080 patent/WO2000061977A1/en active Application Filing
- 2000-04-06 AU AU36543/00A patent/AU3654300A/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133229A (en) * | 1995-04-12 | 1996-10-16 | 周德海 | polyvinyl chloride antistatic plastic pipe and manufacturing method thereof |
| CN2273798Y (en) * | 1996-09-15 | 1998-02-04 | 何甜灶 | Stainless-steel composite tubular products |
| CN1217444A (en) * | 1997-11-18 | 1999-05-26 | 阎金波 | Wound type steel-plastic composite pipeline material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012113862A2 (en) | 2011-02-24 | 2012-08-30 | Uponor Innovation Ab | Making pipe for liquid conveyance |
| CN103950170A (en) * | 2014-05-07 | 2014-07-30 | 张家港市维达纺织机械有限公司 | Continuous production device of three-layer plastic-coated metal pipes |
| CN113211107A (en) * | 2021-04-19 | 2021-08-06 | 浙江锯力煌锯床股份有限公司 | Automatic saw cutting production line |
Also Published As
| Publication number | Publication date |
|---|---|
| AU3654300A (en) | 2000-11-14 |
| CN1242296A (en) | 2000-01-26 |
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