CN106827572A - A kind of production method of thin-walled high impact PVC pipe - Google Patents

A kind of production method of thin-walled high impact PVC pipe Download PDF

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Publication number
CN106827572A
CN106827572A CN201710013462.0A CN201710013462A CN106827572A CN 106827572 A CN106827572 A CN 106827572A CN 201710013462 A CN201710013462 A CN 201710013462A CN 106827572 A CN106827572 A CN 106827572A
Authority
CN
China
Prior art keywords
pipe
compressed air
biaxial stretch
thin
high impact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710013462.0A
Other languages
Chinese (zh)
Inventor
王栋
王飞
薛瑞清
谢永生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangxi Dayu Water Co Ltd
Da Yu Water Saving Group Ltd By Share Ltd
Original Assignee
Guangxi Dayu Water Co Ltd
Da Yu Water Saving Group Ltd By Share Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangxi Dayu Water Co Ltd, Da Yu Water Saving Group Ltd By Share Ltd filed Critical Guangxi Dayu Water Co Ltd
Priority to CN201710013462.0A priority Critical patent/CN106827572A/en
Publication of CN106827572A publication Critical patent/CN106827572A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/88Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911Cooling
    • B29C48/9115Cooling of hollow articles
    • B29C48/912Cooling of hollow articles of tubular films
    • B29C48/913Cooling of hollow articles of tubular films externally
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16Cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001Combinations of extrusion moulding with other shaping operations
    • B29C48/0018Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion 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
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/22Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes
    • B29C55/26Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes biaxial
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16Cooling
    • B29C2035/1658Cooling using gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2027/00Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06PVC, i.e. polyvinylchloride
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00Tubular articles
    • B29L2023/22Tubes or pipes, i.e. rigid

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The present invention relates to a kind of production method of thin-walled high impact PVC pipe, the method is comprised the following steps:(1) polyvinyl chloride mixed ingredients are prepared;(2) polyvinyl chloride mixed ingredients are added in the hopper of extruder, start transmission device;(3) polyvinyl chloride mixed ingredients are pipe through plasticizing, extrusion molding;Pipe by biaxial stretch-formed core carry out pipe axially, it is circumferential biaxial stretch-formed, and a cavity is formed between inwall and core;(5) cavity is entered by the compressed air stream with silicone oil after the treatment of pneumatic oil sprayer, and pipe inside is cooled down;Meanwhile, water smoke is sprayed by cooling water ring outside the pipe pipe is cooled down;Compressed air with silicone oil into the compressed air steam vent flowed through after cavity in biaxial stretch-formed core by tubing internal discharge to the external world;(7) pipe carries out quick cooling and shaping into the calibration sleeve of vacuum sizing box, and finally shaping obtains thin-walled high impact PVC pipe.With low cost, effect is significant of the invention.

Description

A kind of production method of thin-walled high impact PVC pipe
Technical field
The present invention relates to materials processing technology field, more particularly to a kind of production method of thin-walled high impact PVC pipe.
Background technology
PVC be with the processing aids such as Corvic and stabilizer, lubricant after extrusion molding tubing, It is the plastic pipe being developed and applied earliest.Resistance to corrosion is strong, low, quality is hard to be easy to bonding, price because having for PVC It is hard the features such as, relatively broad in systematic differences such as municipal plumbing, industrial plumbing, civilian plumbing, water-saving irrigation.
PVC belongs to the amorphous plasticses of non-crystalline type, due to there is larger polarity containing chlorine element in strand, therefore Its pliability and shock resistance are poor compared with PE, PPR pipe, while with the rise of Coal Chemical Industry, the polyolefinic raw materials price such as PE is received To extreme shock, therefore in recent years in some traditional PVC pipeline fields, the impetus that PVC is substituted by PE and PPR pipe is bright It is aobvious to rise, dramatically it is flooded with the market share of PVC.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of thin-walled high-impact pvc pipe with low cost, effect is significant The production method of material.
To solve the above problems, a kind of production method of thin-walled high impact PVC pipe of the present invention, including following step Suddenly:
(1) polyvinyl chloride mixed ingredients are prepared according to a conventional method;
(2) the polyvinyl chloride mixed ingredients are added in the hopper of extruder, start transmission device;
(3) after the polyvinyl chloride mixed ingredients are by the screw cylinder fusion plastification of the extruder, it is extruded into by cross-head Type is pipe;
(4) the pipe carries out pipe axial direction, circumferential twin shaft in the presence of hauling machine by the biaxial stretch-formed core of inner hollow Stretching, a cavity is formed when the pipe is in the front end by the biaxial stretch-formed core between inwall and core;
(5) by air inlet, core in flowing through the cross-head by the compressed air with silicone oil after the treatment of pneumatic oil sprayer Compressed air air admission hole enters the cavity in rod compressed air runner and the biaxial stretch-formed core, and in the pipe Portion is cooled down;Meanwhile, water smoke is sprayed by cooling water ring outside the pipe pipe is cooled down, make the pipe appearance Face temperature is reduced to 125 ~ 140 DEG C;
(6) the compressed air with silicone oil is into the compressed air steam vent flowed through after the cavity in biaxial stretch-formed core By tubing internal discharge to the external world;
(7) the pipe by the calibration sleeve behind the biaxial stretch-formed core end into vacuum sizing box quickly cool down and determined Type, finally shaping obtains thin-walled high impact PVC pipe.
The step (3) in cross-head in be provided with spreader and mouth mold;The spreader is provided with the air inlet Mouthful;The mouth mold end is provided with thermal insulation board.
The step (4) in cavity in annular shape, its thickness be 2 ~ 5mm.
The step (4) in the front end of biaxial stretch-formed core be uniformly distributed 4 φ 6 ~ 12mm compressed airs in the circumferential and enter Stomata, its middle part is uniformly distributed 8 φ 2 ~ 8mm compressed air steam vents in the circumferential;The compressed air air admission hole with it is described Compression air flow channel is communicated;The compressed air steam vent inside tubing by being communicated to the external world.
The step (4) in biaxial stretch-formed core be connected with plug by screw thread, and be provided with sealing gasket.
The step (5) in compressed air air pressure be 0.04 ~ 0.08MPa.
The step (5) in cooling water ring(8)Hydraulic pressure be 0.015 ~ 0.04MPa.
The present invention has advantages below compared with prior art:
1st, cavity is formed between pipe of the present invention and biaxial stretch-formed core, because being passed through for compressed air can make pipe inside Even quick cooling, simultaneously because the silicone oil brought into through pneumatic oil sprayer in compressed air can make have good between pipe and core Lubricity, can effectively prevent pipe sticking to mould, improve tubing production efficiency and reduce hauling machine load.
2nd, biaxial stretch-formed core front end of the invention and middle part are respectively equipped with air admission hole and steam vent, can make to be passed through pipe and core The good fluid of compressed air of intermode cavity, but because steam vent aperture is small compared with air admission hole aperture, can effectively strengthen gas in cavity Pressure, forces pipe to form the trend of circumferential tension, effectively increases core draw efficiency and reliability.
3rd, pipe allows pipe to produce axial and circumferential in the conical section in by biaxial stretch-formed core in the present invention Stretcher strain, polyvinyl chloride resin macromolecular has certain degree of orientation in tubing circumference simultaneously to make the reduction of pipe wall thickness, and enhancing tubing resists Impact property.
4th, pipe can effectively prevent pipe from shrinking by the flat segments of biaxial stretch-formed core end in the present invention, while cold But the water smoke that water ring is sprayed carries out lasting cooling to pipe and can effectively reduce the disorientation of strand.
5th, the PVC production method that the present invention is provided can effectively reduce product wall thickness, enhance product performance, and low cost It is honest and clean, easy to implement.
Brief description of the drawings
Specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is schematic diagram of the invention.
Fig. 2 is the schematic diagram of biaxial stretch-formed core in the present invention.
In figure:1-transmission device;2-hopper;3-screw cylinder;4-spreader;5-cross-head;6-heat-insulated Plate;7-pipe;8-cooling water ring;9-biaxial stretch-formed core;10-vacuum sizing box;11-hauling machine;12-air inlet; 13-compression air flow channel;14-plug;15-mouth mold;16-compressed air steam vent;17-screw thread;18-sealing gasket; 19-compressed air air admission hole;20-cavity.
Specific embodiment
As shown in Figure 1 and 2, a kind of production method of thin-walled high impact PVC pipe, comprises the following steps:
(1) polyvinyl chloride is prepared according to a conventional method(PVC)Mixed ingredients.
(2) by polyvinyl chloride(PVC)Mixed ingredients are added in the hopper 2 of extruder, start transmission device 1.
(3) polyvinyl chloride(PVC)After mixed ingredients are by the fusion plastification of screw cylinder 3 of extruder, squeezed by cross-head 5 Go out to be shaped to pipe 7.
Wherein:Spreader 4 and mouth mold 15 are provided with cross-head 5;Spreader 4 is provided with air inlet 12;The end of mouth mold 15 End is provided with thermal insulation board 6.
(4) pipe 7 carries out the axial direction of pipe 7, week in the presence of hauling machine 11 by the biaxial stretch-formed core 9 of inner hollow To biaxial stretch-formed, the thin-walled and impact energy of PVC are realized;It is interior when pipe 7 is in the front end by biaxial stretch-formed core 9 It is the cavity 20 of 2 ~ 5mm that one is formed between wall and core in circular, thickness.
Wherein:The front end of biaxial stretch-formed core 9 is uniformly distributed 4 φ 6 ~ 12mm compressed airs air admission holes 19 in the circumferential, Its middle part is uniformly distributed 8 φ 2 ~ 8mm compressed airs steam vents 16 in the circumferential;Compressed air air admission hole 19 and compressed air stream Road 13 is communicated;Compressed air steam vent 16 inside tubing by being communicated to the external world.
Biaxial stretch-formed core 9 is connected by screw thread 17 with plug 14, and is provided with sealing gasket 18.
(5) silicone oil will be carried after pneumatic oil sprayer is processed and air pressure is crowded for the compressed air of 0.04 ~ 0.08MPa is flowed through Compressed air air admission hole 19 in the air inlet 12, the compressed air runner 13 of plug 14 and the biaxial stretch-formed core 9 that go out in machine head 5 Into cavity 20, and to being cooled down inside pipe 7 and being reduced the friction between pipe 7 and biaxial stretch-formed core 9;Meanwhile, the pipe The water smoke that hydraulic pressure is 0.015 ~ 0.04MPa is sprayed by cooling water ring 8 to cool down pipe 7, make the outer surface of pipe 7 outside base 7 Temperature is reduced to 125 ~ 140 DEG C, can effectively reduce the disorientation of strand.
(6) the compressed air with silicone oil is into the compressed air steam vent 16 flowed through after cavity 20 in biaxial stretch-formed core 9 By tubing internal discharge to extraneous, enable compressed air sustainable supply.
(7) pipe 7 by the calibration sleeve behind the end of biaxial stretch-formed core 9 into vacuum sizing box 10 quickly cool down and determined Type, finally shaping obtains thin-walled high impact PVC pipe.

Claims (7)

1. a kind of production method of thin-walled high impact PVC pipe, comprises the following steps:
(1) polyvinyl chloride mixed ingredients are prepared according to a conventional method;
(2) the polyvinyl chloride mixed ingredients are added to the hopper of extruder(2)In, start transmission device(1);
The polyvinyl chloride mixed ingredients by the extruder screw cylinder(3)After fusion plastification, by cross-head(5) Extrusion molding is pipe(7);
(4) the pipe(7)In hauling machine(11)In the presence of by the biaxial stretch-formed core of inner hollow(9)Carry out pipe(7) Axially, it is circumferential biaxial stretch-formed, when the pipe(7)By the biaxial stretch-formed core(9)Front end when inwall and core it Between formed a cavity(20);
(5) the cross-head will be flowed through by the compressed air with silicone oil after the treatment of pneumatic oil sprayer(5)In air inlet (12), plug(14)Compressed air runner(13)With the biaxial stretch-formed core(9)Middle compressed air air admission hole(19)Into The cavity(20), and to the pipe(7)Inside is cooled down;Meanwhile, the pipe(7)Outside is by cooling water ring(8)Spray Water smoke is to the pipe(7)Cooled down, made the pipe(7)Hull-skin temperature is reduced to 125 ~ 140 DEG C;
(6) the compressed air with silicone oil enters the cavity(20)After flow through biaxial stretch-formed core(9)In compressed air Steam vent(16)By tubing internal discharge to the external world;
(7) the pipe(7)By the biaxial stretch-formed core(9)Enter vacuum sizing box behind end(10)Calibration sleeve carry out Quick cooling and shaping, finally shaping obtains thin-walled high impact PVC pipe.
2. a kind of production method of thin-walled high impact PVC pipe as claimed in claim 1, it is characterised in that:The step is (3) In cross-head(5)In be provided with spreader(4)And mouth mold(15);The spreader(4)It is provided with the air inlet(12); The mouth mold(15)End is provided with thermal insulation board(6).
3. a kind of production method of thin-walled high impact PVC pipe as claimed in claim 1, it is characterised in that:The step is (4) In cavity(20)In annular shape, its thickness is 2 ~ 5mm.
4. a kind of production method of thin-walled high impact PVC pipe as claimed in claim 1, it is characterised in that:The step is (4) In biaxial stretch-formed core(9)Front end be uniformly distributed 4 φ 6 ~ 12mm compressed air air admission holes in the circumferential(19), its middle part 8 φ 2 ~ 8mm compressed air steam vents are uniformly distributed in the circumferential(16);The compressed air air admission hole(19)With the compression Air flow channel(13)Communicate;The compressed air steam vent(16)By being communicated to the external world inside tubing.
5. a kind of production method of thin-walled high impact PVC pipe as claimed in claim 1, it is characterised in that:The step is (4) In biaxial stretch-formed core(9)By screw thread(17)With plug(14)Connection, and it is provided with sealing gasket(18).
6. a kind of production method of thin-walled high impact PVC pipe as claimed in claim 1, it is characterised in that:The step is (5) In compressed air air pressure be 0.04 ~ 0.08MPa.
7. a kind of production method of thin-walled high impact PVC pipe as claimed in claim 1, it is characterised in that:The step is (5) In cooling water ring(8)Hydraulic pressure be 0.015 ~ 0.04MPa.
CN201710013462.0A 2017-01-09 2017-01-09 A kind of production method of thin-walled high impact PVC pipe Pending CN106827572A (en)

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Application Number Priority Date Filing Date Title
CN201710013462.0A CN106827572A (en) 2017-01-09 2017-01-09 A kind of production method of thin-walled high impact PVC pipe

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Application Number Priority Date Filing Date Title
CN201710013462.0A CN106827572A (en) 2017-01-09 2017-01-09 A kind of production method of thin-walled high impact PVC pipe

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107443709A (en) * 2017-08-09 2017-12-08 侯新源 A kind of pvc pipe production equipment of automatically continuously addition raw materials for production
CN108189367A (en) * 2018-03-19 2018-06-22 浙江恒烨新材料科技有限公司 One kind improves device based on extruder screw
CN109228067A (en) * 2018-09-27 2019-01-18 佛山迪骏自动化科技有限公司 A kind of device cooling for plastic pipe
CN109333966A (en) * 2018-11-20 2019-02-15 上海公元建材发展有限公司 A kind of production of FRPP reinforcement tubing extrusion molding mould and production method
CN110815768A (en) * 2019-11-19 2020-02-21 苏州大成有方数据科技有限公司 Pipe extruder for producing inner spiral runner PE water pipe and working mode of pipe extruder
CN111086147A (en) * 2019-12-20 2020-05-01 薛家卫 Solid foaming window section bar processing equipment and processing method thereof
CN113752515A (en) * 2021-09-22 2021-12-07 河南亿博科技股份有限公司 Method and equipment for continuously manufacturing steel wire wound hydraulic rubber hose by coreless method
CN115027044A (en) * 2022-06-21 2022-09-09 临海伟星新型建材有限公司 Bidirectional stretching orientation enhancing device and method for pipe

Citations (5)

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Publication number Priority date Publication date Assignee Title
WO2009069754A1 (en) * 2007-11-30 2009-06-04 The Furukawa Electric Co., Ltd. Production method of pipe joint, production device of pipe joint and pipe joint
CN103395183A (en) * 2013-07-26 2013-11-20 鹤山市塑协塑料加工技术研究所有限公司 Manufacturing equipment and production process and method of biaxial orientation PVC (Poly Vinyl Chloride) and polyolefin material pipe
CN103899914A (en) * 2014-03-07 2014-07-02 安徽省无为县良伟化工有限责任公司 Compressed air conveying device
CN204547057U (en) * 2015-01-09 2015-08-12 联塑科技发展(武汉)有限公司 A kind of process units of double-axial hard polyvinyl chloride tubular material
CN205553142U (en) * 2016-03-28 2016-09-07 张家港市斯维达机械有限公司 Effective integrative mould of biaxial stretching

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009069754A1 (en) * 2007-11-30 2009-06-04 The Furukawa Electric Co., Ltd. Production method of pipe joint, production device of pipe joint and pipe joint
CN103395183A (en) * 2013-07-26 2013-11-20 鹤山市塑协塑料加工技术研究所有限公司 Manufacturing equipment and production process and method of biaxial orientation PVC (Poly Vinyl Chloride) and polyolefin material pipe
CN103899914A (en) * 2014-03-07 2014-07-02 安徽省无为县良伟化工有限责任公司 Compressed air conveying device
CN204547057U (en) * 2015-01-09 2015-08-12 联塑科技发展(武汉)有限公司 A kind of process units of double-axial hard polyvinyl chloride tubular material
CN205553142U (en) * 2016-03-28 2016-09-07 张家港市斯维达机械有限公司 Effective integrative mould of biaxial stretching

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107443709A (en) * 2017-08-09 2017-12-08 侯新源 A kind of pvc pipe production equipment of automatically continuously addition raw materials for production
CN108189367A (en) * 2018-03-19 2018-06-22 浙江恒烨新材料科技有限公司 One kind improves device based on extruder screw
CN109228067A (en) * 2018-09-27 2019-01-18 佛山迪骏自动化科技有限公司 A kind of device cooling for plastic pipe
CN109228067B (en) * 2018-09-27 2020-09-08 诸暨市云傲机械配件厂 Device for cooling plastic pipe
CN109333966A (en) * 2018-11-20 2019-02-15 上海公元建材发展有限公司 A kind of production of FRPP reinforcement tubing extrusion molding mould and production method
CN110815768A (en) * 2019-11-19 2020-02-21 苏州大成有方数据科技有限公司 Pipe extruder for producing inner spiral runner PE water pipe and working mode of pipe extruder
CN111086147A (en) * 2019-12-20 2020-05-01 薛家卫 Solid foaming window section bar processing equipment and processing method thereof
CN113752515A (en) * 2021-09-22 2021-12-07 河南亿博科技股份有限公司 Method and equipment for continuously manufacturing steel wire wound hydraulic rubber hose by coreless method
CN115027044A (en) * 2022-06-21 2022-09-09 临海伟星新型建材有限公司 Bidirectional stretching orientation enhancing device and method for pipe
CN115027044B (en) * 2022-06-21 2023-07-11 临海伟星新型建材有限公司 Device and method for reinforcing biaxial stretching orientation of pipe

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Application publication date: 20170613

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