CN104890252A - Novel spiral wound krah pipe continuous production technology and device - Google Patents
Novel spiral wound krah pipe continuous production technology and device Download PDFInfo
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- CN104890252A CN104890252A CN201510301875.XA CN201510301875A CN104890252A CN 104890252 A CN104890252 A CN 104890252A CN 201510301875 A CN201510301875 A CN 201510301875A CN 104890252 A CN104890252 A CN 104890252A
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- pipe
- wound around
- flat rubber
- carat
- rubber belting
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Classifications
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
The invention relates to a novel spiral wound krah pipe continuous production technology and device. The novel spiral wound krah pipe continuous production technology comprises the following technological steps of material stirring operation, heating extrusion, extrusion of circular pipes, extrusion of flat strips, winding of the flat strips, winding of the circular pipes, winding of bells and spigots, cooling, cutting, shape modification of the bells and the spigots, inspection and storage. The impact resistance of spiral wound krah pipes produced through the novel spiral wound krah pipe continuous production technology and device is improved, and continuous production is achieved.
Description
Technical field
The present invention relates to pipe production technical field, be specially a kind of Novel spiral and be wound around carat pipe continuous production technology and equipment.
Background technology
It is all that employing 6 meters of long moulds carry out Wrapping formed that traditional winding strengthens structured wall popes (carat pipe), often produce 6 meters of Changke trombone slides to need to stop extruder (production equipment), again mould is reached on cooling frame with hanging, employing blower fan cools, when reaching 35 degree to environment temperature in summer, product cooling velocity is very slow, and electrical loss is also large, and cooling a mould needs 4 cooling blowers.Expend time in product startup-shutdown, mould lifting and cooling procedure, cause yielding poorly of product, processing cost is high.And in startup-shutdown process, there is waste product (Head material) at every turn, cause unnecessary loss.
Secondly: traditional carat pipe production process is complicated, heated by natural gas, start shooting Wrapping formed, cut and repair the operations such as type, blower fan cooling, deburring, cloth silk, production line labour cost of starting shooting is larger.And need natural gas to mold heated, the inconvenient electrical heating just adopting tens kw of power of some places natural gas, electrical loss costly.
Unstable product quality again, every procedure all mainly manual operations is main, cutting is that control carat pipe product holds, socket size, once cutting temperature is not controlled well, product size is shunk large, and bell and spigot connection sealing is poor, and the electric fuse of cloth wire process mainly heats raw material melting, reach bell socket to fuse into one, the quantity of heating wire cloth and embedding effect determine product quality of connection.Therefore, current carat pipe product quality depends primarily on manual operations.And the invention solves product continuous seepage, reach that output is high, processing cost is low, continuous prodution steady quality, improve the effect of yield rate.Therefore, invention carat pipe continuous-winding forming equipment more easily operates manufacturing enterprise and facilitates.
Summary of the invention
Technical problem solved by the invention is to provide a kind of Novel spiral to be wound around carat pipe continuous production technology and equipment, thus solves the problem in above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions:
A kind of Novel spiral is wound around carat pipe continuous production technology, comprises following technological process:
Technological process is: spice → add hot-extrudable → pipe to extrude → flat rubber belting extrudes → be wound around that flat rubber belting → pipe is wound around → holds, socket is wound around → cools → cuts → hold, type → inspection → warehouse-in repaiied by socket
A kind of Novel spiral is wound around carat pipe continuous production technology, and detailed step is:
The first step, arrange main frame production technology temperature, the machine barrel technological temperature of main frame is set to 165-185 DEG C, and the runner machine mould process set temperature of main frame is 175-190 DEG C, carries out spice and adds hot-extrudable operation, utilizing described runner machine mould to extrude pipe;
Flat rubber belting extruded by second step, startup subsidiary engine, and on forming cylinder mould, carry out carat pipe be wound around a flat rubber belting, complete pipe and be wound around, then complete hold, socket is wound around, according to the different flat rubber belting width of each specification and thickness all inconsistent, flat rubber belting mainly plays inside and outside wall effect in winding process;
Whether the 3rd step, observation product pitch meet required product specification, that is: the width that the flat rubber belting that observation subsidiary engine is extruded overlaps on mould ensures that lap width is 10-12mm;
After 4th step, described flat rubber belting overlap joint forms carat tube body, the pipe hand traction that main frame is extruded is in flat rubber belting overlapping the slot, and light pressure viscosity connects winding one circle;
After 5th step, described pipe are wound around a circle on reinforced pipe conveying mechanism, open described reinforced pipe conveying mechanism, the middle part that ready PP reinforced pipe aims at pipe mould is delivered in the middle of described pipe, the coated described PP reinforced pipe of described pipe, and is adhered to flat rubber belting overlapping the slot place;
6th step, at temperature is 25-30 DEG C, cool 1-2 hour, then cut into the tubing that length is 6-12 meters, to holding, type repaiied by socket →, after the assay was approved, warehouse-in.
In the present invention, 6th step cooling mainly adopts water-spraying control, caliber is adopted to be the water pipe of 12mm, between water temperature 25-30 DEG C, misting cooling is carried out with the tubing of 3 groups or 5 groups (often organizing two) water spout aligning continuous windings, hydraulic pressure control, can between control 2-4% by forming shrinkage ratio within 0.1Mpa.
In 5th step, exactly PP reinforced pipe is curved a circle on reinforced pipe conveying mechanism, circle size can obtain equal control to the speed of formed product.
In the present invention, described PP pipe has the PP pipe mold of specialty and extruder to produce according to tubing specification size, can put into carat pipe product and strengthen after the PP pipe made stacks 24 hours, stand-by during start.Described PP reinforced pipe is first stacked after producing and is re-used for 24 hours.
A kind of carat pipe continuous production device used by above-mentioned technique, comprises subsidiary engine, and described subsidiary engine is wound around flat rubber belting in order to produce carat pipe,
Main frame, described main frame in order to extrude pipe,
Reinforced pipe conveying mechanism, described reinforced pipe conveying mechanism in order in the middle of the pipe that PP reinforced pipe is delivered to described main frame and extrudes,
Forming cylinder mould, described forming cylinder mould utilizes motor to drive rotation,
Roll frame, described in roll erection and be placed in the downstream of forming cylinder mould, in order to carry shaping carat pipe,
Described carat pipe is wound around flat rubber belting and is delivered on described forming cylinder mould helically-wound shaped by described subsidiary engine, and the pipe produced of described main frame, by after coated for described PP reinforced pipe, is wound on carat tube wall shaping on described forming cylinder mould.
In the present invention, described in roll frame both sides water spout is installed, opening is towards shaping carat pipe.
In the present invention, reinforced pipe conveying mechanism has PP reinforced pipe automatic cutting tool.
The component part of the above equipment that the present invention mentions, commercially all has sale.
Host service function display screen can arrange fixed length cutting, preseting length, automatic transport PP pipe etc.Wherein PP pipe centre position is not being had to be cutting part.Pipe end is plane, adopts electric smelting band or Ka Zha to connect, also can be made into cushion rubber socket joint and connect.
Owing to have employed above technical scheme, the present invention has following beneficial effect:
Cost reduces by more than 15%, pipe length can not produce 8-12 rice not etc., and original carat of pipe product length determines length by mould, mould total length 6.8 meters, 6 mitron materials can only be produced, as 500 bore carat pipe continuous seepage length 9 meters compares with original 6 meters of long products, the first conservation of raw material a pair holds, socket, about 15 kilograms of product weight, directly reduce costs, the second, construction connection speed is quick, reduces construction cost.
Output increased more than 30%, for 500 bores, about 240 meters of original carat of pipe product 24 hours, about 420 meters of continuous seepage carat pipe equal conditions, output increased more than 30%, reduces costs.And continuous seepage quality is secure, reliable and stable, transfer continuous producing apparatus Mass Control to by manual control.
Safety coefficient is high, does not need to hang mould frequently, and in original art production process, safety coefficient is lower, and often producing a pipe all will more mold exchange, frequently hangs mould.
Properties of product improve (ring stiffness), and cooling velocity is different, all excellent and existing product of product crystallization, product type height.Ring stiffness test experience, equivalents weight height 0.8KN.
Elongation at break quantity-produced process for cooling is different, and traditional cooling velocity about 1%, causes polyethylene raw material temperature high, and crystallization is slow, makes polyethylene material property to the skew of decomposition direction.Therefore, stretching experiment proves, different process for cooling product quality gaps is large.Shock resistance reduces, 10 Secondary Shocks experiments, 8 times qualified, and adopt water-cooling pattern continuous winding technique, impact experiment 10 times is qualified, and requires low to raw material, and weight reliably reduces manufacturing cost greatly, and traditional product requires high especially to raw material, the brand-new material of basic employing is produced and just can be reached performance requirement.And traditional carat is managed shaping cooling and is merely able to adopt air-cooled, because mold temperature is high, shrinkage ratio is slow, causes product to cool very slow main cause.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.
See Fig. 1, a kind of carat pipe continuous production device, comprise subsidiary engine 1, described subsidiary engine 1 is wound around flat rubber belting in order to produce carat pipe, main frame 2, described main frame 2 is in order to extrude pipe, reinforced pipe conveying mechanism 3, described reinforced pipe conveying mechanism 3 in order to PP reinforced pipe is delivered to described main frame 2 pipe in the middle of, forming cylinder mould 4, described forming cylinder mould 4 utilizes motor 5 to drive rotation, roll frame 6, describedly roll the downstream that frame 6 is arranged at forming cylinder mould 4, in order to carry shaping carat pipe, described carat pipe is wound around flat rubber belting and is delivered on described forming cylinder mould 4 helically-wound shaped by described subsidiary engine 1, the pipe produced of described main frame 2 is by after coated for described PP reinforced pipe, be wound on carat tube wall shaping on described forming cylinder mould 4 and form shaping carat pipe.
In the present invention, the both sides of described forming cylinder mould 4 are provided with water spout 7, and opening is towards the carat pipe after shaping.
In the present invention, reinforced pipe conveying mechanism 3 has PP reinforced pipe automatic cutting tool 8.
A kind of Novel spiral is wound around carat pipe continuous production technology, comprises following technological process:
Technological process is: spice → add hot-extrudable → pipe to extrude → flat rubber belting extrudes → be wound around that flat rubber belting → pipe is wound around → holds, socket is wound around → cools → cuts → hold, type → inspection → warehouse-in repaiied by socket
Embodiment 1
A kind of Novel spiral is wound around carat pipe continuous production technology, and detailed step is:
The first step, arrange main frame production technology temperature, the machine barrel technological temperature of main frame is set to 165 DEG C, and the runner machine mould process set temperature of main frame is 175 DEG C, carries out spice and adds hot-extrudable operation, utilizing described runner machine mould to extrude pipe;
Flat rubber belting extruded by second step, startup subsidiary engine, and on forming cylinder mould, carry out carat pipe be wound around a flat rubber belting, complete pipe and be wound around, then complete hold, socket is wound around, according to the different flat rubber belting width of each specification and thickness all inconsistent, flat rubber belting mainly plays inside and outside wall effect in winding process;
Whether the 3rd step, observation product pitch meet required product specification, that is: the width that the flat rubber belting that observation subsidiary engine is extruded overlaps on mould ensures that lap width is 10mm;
After 4th step, described flat rubber belting overlap joint forms carat tube body, the pipe hand traction that main frame is extruded is in flat rubber belting overlapping the slot, and light pressure viscosity connects winding one circle;
After 5th step, described pipe are wound around a circle on reinforced pipe conveying mechanism, open described reinforced pipe conveying mechanism, the middle part that ready PP reinforced pipe aims at pipe mould is delivered in the middle of described pipe, the coated described PP reinforced pipe of described pipe, and is adhered to flat rubber belting overlapping the slot place;
6th step, at temperature is 25 DEG C, cool 1 hour, then cut into the tubing that length is 6 meters, to holding, socket repaiies type, after the assay was approved, and warehouse-in.
In the present invention, the 6th step cooling mainly adopts water-spraying control, adopts caliber to be the water pipe of 12mm, between water temperature 25 DEG C, carry out misting cooling with the tubing that 3 groups of (often organizing two) water spouts aim at continuous winding, forming shrinkage ratio, within 0.1Mpa, can be controlled 2% by hydraulic pressure control.
In 5th step, exactly PP reinforced pipe is curved a circle on reinforced pipe conveying mechanism, circle size can obtain equal control to the speed of formed product.
In the present invention, described PP pipe has the PP pipe mold of specialty and extruder to produce according to tubing specification size, can put into carat pipe product and strengthen after the PP pipe made stacks 24 hours, stand-by during start.Described PP reinforced pipe is first stacked after producing and is re-used for 24 hours.
Embodiment 2
A kind of Novel spiral is wound around carat pipe continuous production technology, and detailed step is:
The first step, arrange main frame production technology temperature, the machine barrel technological temperature of main frame is set to 185 DEG C, and the runner machine mould process set temperature of main frame is 190 DEG C, carries out spice and adds hot-extrudable operation, utilizing described runner machine mould to extrude pipe;
Flat rubber belting extruded by second step, startup subsidiary engine, and on forming cylinder mould, carry out carat pipe be wound around a flat rubber belting, complete pipe and be wound around, then complete hold, socket is wound around, according to the different flat rubber belting width of each specification and thickness all inconsistent, flat rubber belting mainly plays inside and outside wall effect in winding process;
Whether the 3rd step, observation product pitch meet required product specification, that is: the width that the flat rubber belting that observation subsidiary engine is extruded overlaps on mould ensures that lap width is 12mm;
After 4th step, described flat rubber belting overlap joint forms carat tube body, the pipe hand traction that main frame is extruded is in flat rubber belting overlapping the slot, and light pressure viscosity connects winding one circle;
After 5th step, described pipe are wound around a circle on reinforced pipe conveying mechanism, open described reinforced pipe conveying mechanism, the middle part that ready PP reinforced pipe aims at pipe mould is delivered in the middle of described pipe, the coated described PP reinforced pipe of described pipe, and is adhered to flat rubber belting overlapping the slot place;
6th step, at temperature is 30 DEG C, cool 2 hours, then cut into the tubing that length is 12 meters, to holding, socket repaiies type, after the assay was approved, and warehouse-in.
In the present invention, the 6th step cooling mainly adopts water-spraying control, adopts caliber to be the water pipe of 12mm, between water temperature 30 DEG C, carry out misting cooling with the tubing that 5 groups of (often organizing two) water spouts aim at continuous winding, forming shrinkage ratio, within 0.1Mpa, can be controlled 4% by hydraulic pressure control.
In 5th step, exactly PP reinforced pipe is curved a circle on reinforced pipe conveying mechanism, circle size can obtain equal control to the speed of formed product.
In the present invention, described PP pipe has the PP pipe mold of specialty and extruder to produce according to tubing specification size, can put into carat pipe product and strengthen after the PP pipe made stacks 24 hours, stand-by during start.Described PP reinforced pipe is first stacked after producing and is re-used for 24 hours.
Embodiment 3
A kind of Novel spiral is wound around carat pipe continuous production technology, and detailed step is:
The first step, arrange main frame production technology temperature, the machine barrel technological temperature of main frame is set to 178 DEG C, and the runner machine mould process set temperature of main frame is 180 DEG C, carries out spice and adds hot-extrudable operation, utilizing described runner machine mould to extrude pipe;
Flat rubber belting extruded by second step, startup subsidiary engine, and on forming cylinder mould, carry out carat pipe be wound around a flat rubber belting, complete pipe and be wound around, then complete hold, socket is wound around, according to the different flat rubber belting width of each specification and thickness all inconsistent, flat rubber belting mainly plays inside and outside wall effect in winding process;
Whether the 3rd step, observation product pitch meet required product specification, that is: the width that the flat rubber belting that observation subsidiary engine is extruded overlaps on mould ensures that lap width is 11mm;
After 4th step, described flat rubber belting overlap joint forms carat tube body, the pipe hand traction that main frame is extruded is in flat rubber belting overlapping the slot, and light pressure viscosity connects winding one circle;
After 5th step, described pipe are wound around a circle on reinforced pipe conveying mechanism, open described reinforced pipe conveying mechanism, the middle part that ready PP reinforced pipe aims at pipe mould is delivered in the middle of described pipe, the coated described PP reinforced pipe of described pipe, and is adhered to flat rubber belting overlapping the slot place;
6th step, at temperature is 28 DEG C, cool 1.5 hours, then cut into the tubing that length is 10 meters, to holding, socket repaiies type, after the assay was approved, and warehouse-in.
In the present invention, the 6th step cooling mainly adopts water-spraying control, adopts caliber to be the water pipe of 12mm, between water temperature 27 DEG C, carry out misting cooling with the tubing that 3 groups of (often organizing two) water spouts aim at continuous winding, forming shrinkage ratio, within 0.1Mpa, can be controlled 3% by hydraulic pressure control.
In 5th step, exactly PP reinforced pipe is curved a circle on reinforced pipe conveying mechanism, circle size can obtain equal control to the speed of formed product.
In the present invention, described PP pipe has the PP pipe mold of specialty and extruder to produce according to tubing specification size, can put into carat pipe product and strengthen after the PP pipe made stacks 24 hours, stand-by during start.Described PP reinforced pipe is first stacked after producing and is re-used for 24 hours.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (7)
1. Novel spiral is wound around a carat pipe continuous production technology, it is characterized in that: comprise following technological process:
Technological process is: spice → add hot-extrudable → pipe to extrude → flat rubber belting extrudes → be wound around that flat rubber belting → pipe is wound around → holds, socket is wound around → cools → cuts → hold, type → inspection → warehouse-in repaiied by socket.
2. a kind of Novel spiral according to claim 1 is wound around carat pipe continuous production technology, it is characterized in that: detailed step is:
The first step, arrange main frame production technology temperature, the machine barrel technological temperature of main frame is set to 165-185 DEG C, and the runner machine mould process set temperature of main frame is 175-190 DEG C, carries out spice and adds hot-extrudable operation, utilizing described runner machine mould to extrude pipe;
Flat rubber belting extruded by second step, startup subsidiary engine, and on forming cylinder mould, carry out carat pipe be wound around a flat rubber belting, complete pipe and be wound around, then complete hold, socket is wound around, according to the different flat rubber belting width of each specification and thickness all inconsistent, flat rubber belting mainly plays inside and outside wall effect in winding process;
Whether the 3rd step, observation product pitch meet required product specification, that is: the width that the flat rubber belting that observation subsidiary engine is extruded overlaps on mould ensures that lap width is 10-12mm;
After 4th step, described flat rubber belting overlap joint forms carat tube body, the pipe hand traction that main frame is extruded is in flat rubber belting overlapping the slot, and light pressure viscosity connects winding one circle;
After 5th step, described pipe are wound around a circle on reinforced pipe conveying mechanism, open described reinforced pipe conveying mechanism, the middle part that ready PP reinforced pipe aims at pipe mould is delivered in the middle of described pipe, the coated described PP reinforced pipe of described pipe, and is adhered to flat rubber belting overlapping the slot place;
6th step, at temperature is 25-30 DEG C, cool 1-2 hour, then cut into the tubing that length is 6-12 meters, to holding, socket repaiies type, after the assay was approved, and warehouse-in.
3. a kind of Novel spiral according to claim 1 is wound around carat pipe continuous production technology, it is characterized in that: the 6th step cooling mainly adopts water-spraying control, caliber is adopted to be the water pipe of 12mm, between water temperature 25-30 DEG C, misting cooling is carried out with the tubing of 3 groups or 5 groups (often organizing two) water spout aligning continuous windings, hydraulic pressure control, can between control 2-4% by forming shrinkage ratio within 0.1Mpa.
4. a kind of Novel spiral according to claim 1 is wound around carat pipe continuous production technology, it is characterized in that: described PP reinforced pipe is first stacked after producing and re-used for 24 hours.
5. for an equipment for technique described in any one of claim 1-4, it is characterized in that: comprise subsidiary engine, described subsidiary engine is wound around flat rubber belting in order to produce carat pipe,
Main frame, described main frame in order to extrude pipe,
Reinforced pipe conveying mechanism, described reinforced pipe conveying mechanism in order in the middle of the pipe that PP reinforced pipe is delivered to described main frame and extrudes,
Forming cylinder mould, described forming cylinder mould utilizes motor to drive rotation,
Roll frame, described in roll erection and be placed in the downstream of forming cylinder mould, in order to carry shaping carat pipe,
Described carat pipe is wound around flat rubber belting and is delivered on described forming cylinder mould helically-wound shaped by described subsidiary engine, and the pipe produced of described main frame, by after coated for described PP reinforced pipe, is wound on carat tube wall shaping on described forming cylinder mould.
6. equipment as claimed in claim 5, is characterized in that: described in roll frame both sides water spout is installed, opening is towards shaping carat pipe.
7. equipment as claimed in claim 5, is characterized in that: reinforced pipe conveying mechanism has PP reinforced pipe automatic cutting tool.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510301875.XA CN104890252A (en) | 2015-06-05 | 2015-06-05 | Novel spiral wound krah pipe continuous production technology and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510301875.XA CN104890252A (en) | 2015-06-05 | 2015-06-05 | Novel spiral wound krah pipe continuous production technology and device |
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| CN104890252A true CN104890252A (en) | 2015-09-09 |
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| CN201510301875.XA Pending CN104890252A (en) | 2015-06-05 | 2015-06-05 | Novel spiral wound krah pipe continuous production technology and device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106799847A (en) * | 2017-03-30 | 2017-06-06 | 冯栓良 | Structure wall winding tube continuous production device and its production technology |
| CN107160663A (en) * | 2017-06-30 | 2017-09-15 | 吉林省长光瑞思激光技术有限公司 | The preparation method and making apparatus of a kind of new carat pipe |
| CN107650352A (en) * | 2017-05-08 | 2018-02-02 | 鹤山联塑实业发展有限公司 | A kind of HDPE ribbed pipes coating mould and its ribbed pipe forming method |
| CN109016551A (en) * | 2018-07-09 | 2018-12-18 | 浙江全球管业有限公司 | A kind of production method of composite reinforced polyethylene winding structure wall pipe |
| CN111873388A (en) * | 2020-06-24 | 2020-11-03 | 安徽塑茂管道科技有限公司 | Inner and outer ring cooling equipment for Krah pipe production and operation method thereof |
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| CN104476787A (en) * | 2014-10-27 | 2015-04-01 | 湖南前元新材料有限公司 | Krah pipe continuous-production device and production technology |
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| CN111873388A (en) * | 2020-06-24 | 2020-11-03 | 安徽塑茂管道科技有限公司 | Inner and outer ring cooling equipment for Krah pipe production and operation method thereof |
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Application publication date: 20150909 |