CN110315732A - Multi-fluid same layer co-extrusion pipeline and its production die head and method - Google Patents
Multi-fluid same layer co-extrusion pipeline and its production die head and method Download PDFInfo
- Publication number
- CN110315732A CN110315732A CN201910513025.4A CN201910513025A CN110315732A CN 110315732 A CN110315732 A CN 110315732A CN 201910513025 A CN201910513025 A CN 201910513025A CN 110315732 A CN110315732 A CN 110315732A
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- Prior art keywords
- pipeline
- fluid
- same layer
- arc section
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- 239000012530 fluid Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000001125 extrusion Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 22
- 239000004594 Masterbatch (MB) Substances 0.000 description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 239000008188 pellet Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004595 color masterbatch Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 235000015170 shellfish Nutrition 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/14—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
- B32B5/142—Variation across the area of the layer
-
- 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
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/133—Rigid pipes of plastics with or without reinforcement the walls consisting of two layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/102—Oxide or hydroxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/107—Ceramic
- B32B2264/108—Carbon, e.g. graphite particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses multi-fluid same layer co-extrusion pipeline and its production die heads and method, which includes several layers from outside to inside, it is characterized in that: the innermost layer contacted with fluid its 3600Section on be divided into several arc sections as needed, functional material is added as needed in the material of main part of every section of circular arc.Using the multi-fluid same layer co-extrusion pipeline of production die head of the invention and method production, pipeline innermost layer assigns multiple functions in same level, generates different role respectively to the fluid transmitted, to change by a variety of unfavorable characters of transmission fluid.
Description
Technical field
The invention belongs to pipeline fields, and in particular to multi-fluid same layer co-extrusion pipeline and its production die head and method.
Background technique
It is well known that in daily work life, pipeline is the means of delivery of fluid；At present on the basis of single-layer pipeline
There is multi-layered composite pipe again, existing multiple tube is layering coextru-lamination from outside to inside, practical directly to contact only with fluid
For innermost layer；For expansion line function, some adds simple function material, this single function in the material of main part of innermost layer
The use scope of the tubing of energy is limited；Two above functions materials of addition in the material of main part of innermost layer also, but it is necessary
Guarantee that two above functions materials do not chemically react between each other；In addition, even if two above functions materials are not changed
Learn reaction, also due under same volume additive amount reduction, and lead to the reduction of function, pipe design requirement be not achieved.
Summary of the invention
The purpose of the present invention is: design multi-fluid same layer co-extrusion pipeline and its production die head and method, using of the invention
Production die head and method produce a kind of multi-fluid same layer co-extrusion pipeline, and pipeline innermost layer is made to assign multiple functions in same level.
The technical solution of the invention is as follows: the multi-fluid same layer co-extrusion pipeline includes several layers, feature from outside to inside
Be: the innermost layer contacted with fluid its 3600Section on be divided into several arc sections as needed, arc section is in same layer
Face is arranged successively, and functional material is added as needed in the material of main part of every section of circular arc.
Further, the arc section that identical function material is added in pipeline innermost layer is distributed in cruciform symmetry.
Further, different pigments are added in each arc section to distinguish.
Wherein, the production die head of the multi-fluid same layer co-extrusion pipeline, it includes die main body, and master is set on die main body
Runner feeds the outermost layer of production pipeline by sprue；By shunting bracket, design runner is accurate by material needed for internal layer
It is transported on the specific position of plug；Several arc section runners are set on plug again, several arc section runners are in plug
3600Section on be symmetric as needed, one of circular arc of the innermost layer of each arc section runner charging production pipeline
Section.
Wherein, the production method of the multi-fluid same layer co-extrusion pipeline is: in pipeline production process, by it is different into
Stream road, the material after being heated as fluid are respectively fed to the sprue of die main body and several arc section streams of plug
Road；Recycle the influence to material fluidity of feeding speed, temperature, be ranked as needed each functional material innermost layer difference
Distribution area and distributing position；Most multi-fluid same layer co-extrusion pipeline is formed through cooling and shaping afterwards.
The invention has the advantages that
1, pipeline innermost layer imparts multiple functions in same level, and simple transmit process is become certain reaction
Journey generates different role to the fluid transmitted respectively, selectively eliminates or weakens the pessimum of fluid, retain the excellent of fluid
Property, expand the use scope of tubing.
2, the die head of production pipeline is simple, and relative inexpensiveness is easy to use, stable.
3, the simple process of production pipeline, operation are easy, and technic index control is stablized, and ensure pipeline quality.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pipeline of the invention；
Fig. 2 is the cross-section of pipeline schematic diagram of Fig. 1；
Fig. 3 is the structural schematic diagram of pipeline production line of the invention；
Fig. 4 is the die head general assembly drawing of pipeline production line of the invention；
Fig. 5 is the die main body structural schematic diagram of Fig. 4；
Fig. 6 is the schematic cross-sectional view of Fig. 5；
Fig. 7 is the mandrel holder structural schematic diagram of Fig. 4；
Fig. 8 is the schematic cross-sectional view of Fig. 7；
Fig. 9 is the mandrel structure schematic diagram of Fig. 4；
The schematic cross-sectional view of Fig. 9 of Figure 10.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawings and examples, but is not to be construed as pair
The limitation of technical solution, adaptive improvement on this basis come under protection scope of the present invention.
Embodiment 1: it is spare to prepare four acicular type zinc oxide crystal whisker master batch
It takes: handing over the four acicular type zinc oxide crystal whisker of big brilliant space science and technology, the linear polyethylene 7040 of Yangtze petrochemical industry, dispersing agent EBS in Chengdu；
Various raw materials are put into high-speed mixer, are uniformly mixed；Mixture puts into flat double pelletizers by heating balance again
In, pelletizing, cooling, drying are squeezed out, is collected spare；Wherein, four acicular type zinc oxide crystal whisker, linear polyethylene 7040 and dispersing agent
The mass ratio of EBS is 7:90:3；Wherein, head setting stepwise temperature when granulation: 1 section 165 DEG C, 2 sections 175 DEG C, 3 section 185
DEG C, 4 sections 195 DEG C；Pelletizer squeezes out revolving speed: 29 r/min；Wherein, double pelletizers are put down by the outstanding molding machine production of Nanjing gold, high-speed stirring
Machine is mixed to be produced by the new shellfish molding machine in Zhangjiagang.
Embodiment 2: it is spare to prepare bamboo carbon powder master batch
It takes: the high temperature active bamboo carbon powder of Anji County, Zhejiang Province, the linear polyethylene 7042 of Yangtze petrochemical industry, dispersing agent EBS；By various raw materials
It puts into high-speed mixer, is uniformly mixed；Mixture is put into again in flat double pelletizers by heating balance, is cut through squeezing out
Grain, cooling, drying, are collected spare；Wherein, high temperature active bamboo carbon powder, linear polyethylene 7042, dispersing agent EBS mass ratio be
7:90:3；Wherein, head setting stepwise temperature when granulation: 1 section 165 DEG C, 2 sections 175 DEG C, 3 sections 185 DEG C, 4 sections 195 DEG C；It makes
Grain machine squeezes out revolving speed: 29 r/min；Wherein, double pelletizers are put down by the outstanding molding machine production of Nanjing gold, high-speed mixer is new by Zhangjiagang
The production of shellfish molding machine.
Embodiment 3: production multi-fluid same layer co-extrusion pipeline
Raw and auxiliary material prepares: PPR pellet (Beijing Yanshan Petrochemical), 4220 Masterbatch (Huaian rise color masterbatch), four needle-shaped oxidations
Zinc whisker master batch (embodiment 1), bamboo carbon powder master batch (embodiment 2).
Mechanical equipment (as shown in Figure 3):
50 single screw extrusion machines (2, Wuxi state great waves machinery)；
32 single screw extrusion machines (1, Wuxi state great waves machinery)；
20 color scale line machines (1, Wuxi state great waves machinery)；
25-20 die head (1 set, as shown in Fig. 4-Figure 10)；
Vacuum sizing water tank (1, Wuxi state great waves machinery)；
Draw cutting machine (1, Wuxi state great waves machinery).
Production technology and process:
PPR pellet+color masterbatch puts into No. 1 machine after mixing
Temperature sets (DEG C): 1 section 2 sections 3 sections 4 sections
215 220 225 225
Revolving speed setting: 30 r/min
PPR pellet+ZnOw master batch puts into No. 2 machines after mixing
Temperature sets (DEG C): 1 section 2 sections 3 sections 4 sections
215 220 225 225
Revolving speed setting: 5 r/min
PPR pellet+bamboo carbon powder master batch puts into No. 3 machines after mixing
Temperature sets (DEG C): 1 section 2 sections 3 sections
220 225 230
Revolving speed setting: 20 r/min
PPR pellet+red master batch puts into No. 4 machines after mixing
Temperature sets (DEG C): 1 section 2 sections
195 195
Revolving speed setting: 1.9 r/min
Head temperature (DEG C): 210
Heat up each extruder simultaneously；After equalized temperature, successively start each extruder；The material of extrusion is cold by vacuum
But it is formed, forms the pipe of the stable structure of our needs, as shown in Figure 1 and Figure 2.
Claims (5)
1. multi-fluid same layer co-extrusion pipeline, which includes several layers from outside to inside, it is characterized in that: the innermost layer contacted with fluid
It is divided into several arc sections as needed on its 3600 section, arc section is arranged successively in same level, every section of circular arc
Functional material is added as needed in material of main part.
2. multi-fluid same layer co-extrusion pipeline according to claim 1, it is characterized in that: adding identical function in pipeline innermost layer
The arc section of material is distributed in cruciform symmetry.
3. multi-fluid same layer co-extrusion pipeline according to claim 1, it is characterized in that: adding different pigments in each arc section
To distinguish.
4. the production die head of multi-fluid same layer co-extrusion pipeline, it includes die main body, and sprue is set on die main body, passes through master
The outermost layer of runner charging production pipeline；By shunting bracket, runner is designed by material needed for internal layer and is precisely transported to plug
Specific position on；Several arc section runners are designed on plug again, several arc section runners are the 360 of plug0Cut
It is symmetric as needed on face, one of arc section of the innermost layer of each arc section runner difference feeding production pipeline.
5. the production method of multi-fluid same layer co-extrusion pipeline, it is characterized in that: passing through different feeding flows in pipeline production process
Road, the material after being heated as fluid are respectively fed to the sprue of die main body and several arc section runners of plug；
The influence of feeding speed, temperature to material fluidity is recycled, each functional material that is ranked as needed divides in the difference of innermost layer
Cloth area and distributing position；Most multi-fluid same layer co-extrusion pipeline is formed through cooling and shaping afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910513025.4A CN110315732A (en) | 2019-06-14 | 2019-06-14 | Multi-fluid same layer co-extrusion pipeline and its production die head and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910513025.4A CN110315732A (en) | 2019-06-14 | 2019-06-14 | Multi-fluid same layer co-extrusion pipeline and its production die head and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110315732A true CN110315732A (en) | 2019-10-11 |
Family
ID=68119835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910513025.4A Pending CN110315732A (en) | 2019-06-14 | 2019-06-14 | Multi-fluid same layer co-extrusion pipeline and its production die head and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110315732A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906066A (en) * | 2019-12-09 | 2020-03-24 | 东台市竹林高科技材料有限公司 | High-strength and high-pressure-resistance PVC (polyvinyl chloride) pipe and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106738774A (en) * | 2016-12-31 | 2017-05-31 | 剑河县连光复合塑料水管有限公司 | Double-layer composite pipe extruded mould |
| WO2018166722A1 (en) * | 2017-03-17 | 2018-09-20 | Schlemmer Holding GmbH | Multi-component extrusion spray head, multi-component extrusion system and method for producing a composite tube |
-
2019
- 2019-06-14 CN CN201910513025.4A patent/CN110315732A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106738774A (en) * | 2016-12-31 | 2017-05-31 | 剑河县连光复合塑料水管有限公司 | Double-layer composite pipe extruded mould |
| WO2018166722A1 (en) * | 2017-03-17 | 2018-09-20 | Schlemmer Holding GmbH | Multi-component extrusion spray head, multi-component extrusion system and method for producing a composite tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906066A (en) * | 2019-12-09 | 2020-03-24 | 东台市竹林高科技材料有限公司 | High-strength and high-pressure-resistance PVC (polyvinyl chloride) pipe and preparation method thereof |
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Application publication date: 20191011 |
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