CN103072240B - Core-pulling winding machine - Google Patents
Core-pulling winding machine Download PDFInfo
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- CN103072240B CN103072240B CN201310033053.9A CN201310033053A CN103072240B CN 103072240 B CN103072240 B CN 103072240B CN 201310033053 A CN201310033053 A CN 201310033053A CN 103072240 B CN103072240 B CN 103072240B
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- core rod
- pipe fitting
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- lifting piece
- winding machine
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Abstract
The invention discloses a core-pulling winding machine which comprises a rack, a winding device, a core-pulling device and a conveying track between the winding device and the core-pulling device. The winding device comprises a mold core mounting seat and a mold core power device, wherein the mold core mounting seat is mounted on the conveying track in a sliding manner, and a power clutch mechanism is arranged between the mold core power device and the mold core mounting seat. The core-pulling device comprises an upper lifting piece, a lower lifting piece, an upper pipe fitting baffle and a lower pipe fitting baffle, wherein the upper pipe fitting baffle and the lower pipe fitting baffle are mounted on the rack; the upper lifting piece is vertically mounted on the rack in a sliding manner, and located above the upper pipe fitting baffle; the lower lifting piece is vertically mounted on the rack in a sliding manner, and located below the lower pipe fitting baffle; the upper pipe fitting baffle and the lower pipe fitting baffle are provided with openings; the upper lifting piece is provided with an upper lifting structure that can be connected with or separated from an upper half body of a mold core; the lower lifting piece is provided with a lower lifting structure that can be connected with or separated from a lower half body of the mold core; and the upper lifting piece and the lower lifting piece are driven by an upper lifting power device and a lower lifting power device respectively. The core-pulling winding machine improves the working efficiency, and saves manpower and material resources greatly.
Description
Technical field
The present invention relates to the one coil winding machine of loosing core.
Background technology
The whole process that electric capacity pipe fitting is produced comprises coiling, injection moulding, withdrawing pattern and matched moulds, need first on coil winding machine, to wind the line, then to injection mo(u)lding on injection machine, after moulding is cooling, to horizontal withdrawing pattern on ingot stripper, core rod is extracted, tube manufacture completes, produce crucial if continue, need first core rod to be assembled, and then carry out coiling as above, injection moulding, the processes such as withdrawing pattern, each process of the production of pipe fitting is all carried out separately at present, lack continuity, operating efficiency is lower, and the automaticity that pipe fitting is produced is very low, in production process, need to spend a large amount of man power and materials.
Summary of the invention
Technical problem to be solved by this invention is: the one coil winding machine of loosing core is provided, and this coil winding machine has not only been saved a large amount of man power and materials, and has improved the operating efficiency of the coiling of loosing core.
For solving the problems of the technologies described above, technical scheme of the present invention is: the coil winding machine of loosing core, comprise frame, Winder, core-pulling device and be arranged at Winder and core-pulling device between delivery track; This Winder comprises core rod mount pad and the core rod power set that drive core rod mount pad to rotate, and core rod mount pad is slidably mounted on delivery track, between described core rod power set and core rod mount pad, is provided with power clutch mechanism; Core-pulling device, comprises upper lifting piece for upwards lifting core rod upper semi-body, for lifting the lower lifting piece of core rod lower semi-body downwards, for coordinating the pipe fitting overhead gage and the pipe fitting lower baffle plate that stop pipe fitting motion; Described pipe fitting overhead gage and pipe fitting lower baffle plate are all installed in frame, and described upper lifting piece is vertically slidably mounted in frame and is positioned at the top of pipe fitting overhead gage, and described lower lifting piece is vertically slidably mounted in frame and is positioned at the below of pipe fitting lower baffle plate; Pipe fitting overhead gage and pipe fitting lower baffle plate are equipped with the opening that can pass for core rod; Upper lifting piece is provided with the upper stretching structure that can be connected or depart from core rod upper semi-body, and lower lifting piece is provided with the lower stretching structure that can be connected or depart from core rod lower semi-body; Upper lifting piece and lower lifting piece are driven by the upper and lower power set that lift respectively.
As a preferred scheme, described upper lifting piece comprises and lifts plate and installing rack, described frame is provided with head tree, installing rack is installed on head tree, described installing rack is provided with lead, on described, lift plate and be slidably mounted on lead, upper stretching structure is arranged at and lifts on plate, lifts power set on described to be installed on installing rack.
As a preferred scheme, described installing rack is slidably mounted on head tree, between installing rack and frame, is provided with lowering or hoisting gear, and described pipe fitting overhead gage is fixed on installing rack.
As a preferred scheme, under described lower lifting piece comprises, lift plate, lower lead is installed in frame, under lift plate and be slidably mounted on lower lead, described lower stretching structure is arranged at down and lifts on plate.
As a preferred scheme, described upper stretching structure comprises one group of hangers, and this hangers is fixed on the bottom that lifts plate, and corresponding core rod upper semi-body is provided with pin hole, between this hangers and core rod upper semi-body, is connected by latch; Described lower stretching structure comprises one group of hangers, and this hangers is fixed on down the top that lifts plate, and corresponding core rod lower semi-body is provided with pin hole, between the hangers of lower stretching structure and core rod lower semi-body, is connected by latch.
As a preferred scheme, described power clutch mechanism comprises lifting platform, lifting platform drive unit and driving shaft, these core rod power set are installed on lifting platform, described driving shaft is connected with the clutch end of core rod power set, this lifting platform drives lifting by lifting platform drive unit, and the end of this driving shaft is provided with core rod mount pad and coordinates the drive mechanism being in transmission connection.
As a preferred scheme, described drive mechanism comprises the axis of the end that is arranged on driving shaft, and the bottom cooperation of corresponding core rod mount pad is provided with the axis hole that holds driving shaft, and this axis hole sidewall is provided with the draw-in groove with axis corresponding matching.
As a preferred scheme, described driving shaft comprises main shaft and axle sleeve, and described main shaft is connected with core rod power set, described axle sleeve be set on main shaft and with main shaft spline joint, described axis is arranged on axle sleeve, is pressed with in advance buffer spring between described main shaft and axle sleeve.
As a preferred scheme, pipe fitting saddle is also installed in described frame, described pipe fitting saddle is connected with the plane of pipe fitting lower baffle plate.
As a preferred scheme, described frame is provided with limiting buffer device, and described limiting buffer device restriction core rod mount pad is in coiling position.
Adopt after technique scheme, effect of the present invention is: the coil winding machine of originally loosing core will loose core process and the combination of coiling process, coiling, withdrawing pattern, matched moulds can complete on uniform machinery, can realize fast the switching between coiling position and withdrawing pattern position by the delivery track between Winder and core-pulling device, after completing, withdrawing pattern can assemble matched moulds at once, then by delivery track, core rod is delivered to coiling position, can wind the line, withdrawing pattern, matched moulds, coiling becomes the process of carrying out continuously, not only greatly improve the operating efficiency of the coiling of loosing core, and save a large amount of man power and materials.
Described installing rack is slidably mounted on head tree, between installing rack and frame, is provided with lowering or hoisting gear, and described pipe fitting overhead gage is fixed on installing rack, and the lifting of adjusting pipe fitting overhead gage by lowering or hoisting gear can adapt to the withdrawing pattern requirement of the core rod of different size.
Described driving shaft comprises main shaft and axle sleeve, described main shaft is connected with core rod power set, described axle sleeve be set on main shaft and with main shaft spline joint, described axis is arranged on axle sleeve, between described main shaft and axle sleeve, be pressed with in advance buffer spring, when axis and draw-in groove could not be aimed at while engaging, buffer spring is in compressive state, core rod power set drive shaft body suitably rotates adjusts position, in the process of rotating at main shaft, axis and draw-in groove position are also being adjusted, in the time of position alignment, under the effect of buffer spring, promoting axle sleeve moves upward axis can be engaged successfully with draw-in groove.
Pipe fitting saddle is also installed in described frame, described pipe fitting saddle is connected with the plane of pipe fitting lower baffle plate, and withdrawing pattern rear tubular member has been produced, and staff moves to pipe fitting rapidly pipe fitting saddle, can carry out the operation of matched moulds at once, ensure the continuity that pipe fitting is produced.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the structural representation of Fig. 1 front view;
Fig. 3 is the structural representation of Fig. 1 top view;
Fig. 4 be in Fig. 3 A-A to structure cutaway view;
Fig. 5 is the structural representation of Fig. 1 left view;
In accompanying drawing: 1. frame; 2. core rod; 3. pin hole; 4. core rod mount pad; 5. core rod power set; 6. pipe fitting overhead gage; 7. pipe fitting lower baffle plate; 8. lift power set; 9. on, lift plate; 10. lift down plate; 11. head trees; 12. leading screw and nut mechanisms; 13. delivery tracks; 14. pipe fitting saddles; 15. limiting buffer devices; 16. hangers; 17. rollers; 18. installing racks; Lead on 19.; 20. lifting platforms; 21. lifting platform drive units; 22. driving shafts; 221. main shaft; 222. axle sleeve; 23. axis holes; 24. axis; 25. draw-in grooves; 26. buffer springs; 27. times leads.
Detailed description of the invention
Below by specific embodiment, the present invention's coil winding machine of loosing core is described in further detail.
As shown in Fig. 1 to 5, the coil winding machine of loosing core, comprises frame 1, Winder, core-pulling device and be arranged at Winder and core-pulling device between delivery track 13;
This Winder comprises core rod mount pad 4 and the core rod power set 5 that drive core rod mount pad 4 to rotate, core rod mount pad 4 is slidably mounted on delivery track 13, the bottom of core rod mount pad 4 is provided with the roller 17 being used in conjunction with delivery track 13, between described core rod power set 5 and core rod mount pad 4, be provided with power clutch mechanism, power clutch mechanism comprises lifting platform 20, lifting platform drive unit 21 and driving shaft 22, these core rod power set 5 are installed on lifting platform 20, described driving shaft 22 is connected with the clutch end of core rod power set 5, this lifting platform 20 drives lifting by lifting platform drive unit 21, this lifting platform drive unit 21 can be cylinder, oil cylinder etc.The end of this driving shaft 22 is provided with core rod mount pad 4 and coordinates the drive mechanism being in transmission connection, drive mechanism comprises the axis 24 of the end that is arranged on driving shaft 22, the bottom cooperation of corresponding core rod mount pad 4 is provided with the axis hole 23 that holds driving shaft 22, these axis hole 23 sidewalls are provided with the draw-in groove 25 with axis 24 corresponding matching, certainly, all right other structures of drive mechanism, as the bottom of core mount pad 4 is provided with square or other polygonal jacks, corresponding, the end of driving shaft 22 is provided with the inserting paragraph matching with jack shape.Driving shaft 22 comprises main shaft 221 and axle sleeve 222, described main shaft 221 is connected with core rod power set 5, described axle sleeve 222 be set on main shaft 221 and with main shaft 221 spline joints, described axis 24 is arranged on axle sleeve 222, between described main shaft 221 and axle sleeve 222, is pressed with in advance buffer spring 26.
Core-pulling device, comprises upper lifting piece for upwards lifting core rod upper semi-body, for lifting the lower lifting piece of core rod lower semi-body downwards, for coordinating the pipe fitting overhead gage 6 and the pipe fitting lower baffle plate 7 that stop pipe fitting motion, described pipe fitting overhead gage 6 and pipe fitting lower baffle plate 7 are all installed in frame 1, and described upper lifting piece is vertically slidably mounted in frame 1 and is positioned at the top of pipe fitting overhead gage 6, and described lower lifting piece is vertically slidably mounted in frame 1 and is positioned at the below of pipe fitting lower baffle plate 7, pipe fitting overhead gage 6 and pipe fitting lower baffle plate 7 are equipped with the opening that can pass for core rod 2, upper lifting piece is provided with the upper stretching structure that can be connected or depart from core rod upper semi-body, lower lifting piece is provided with the lower stretching structure that can be connected or depart from core rod lower semi-body, in the present embodiment, upper lifting piece comprises and lifts plate 9 and installing rack 18, described frame 1 is provided with head tree 11, installing rack 18 is slidably mounted on head tree 11, described installing rack 18 is provided with lead 19, pipe fitting overhead gage 6 is fixed on installing rack 18, between installing rack 18 and frame 1, be provided with lowering or hoisting gear, lowering or hoisting gear is leading screw and nut mechanism 12, on described, lifting plate 9 is slidably mounted on lead 19, upper stretching structure is arranged at and lifts on plate 9, on described, lifting power set 8 is installed on installing rack 18, upper stretching structure comprises one group of hangers 16, this hangers 16 is fixed on the bottom that lifts plate 9, corresponding core rod upper semi-body is provided with pin hole 3, between this hangers 16 and core rod upper semi-body, be connected by latch, described lower stretching structure comprises one group of hangers 16, and this hangers 16 is fixed on down the top that lifts plate 10, and corresponding core rod lower semi-body is provided with pin hole 3, between the hangers 16 of lower stretching structure and core rod lower semi-body, is connected by latch.Upper lifting piece and lower lifting piece are driven by the upper and lower power set 8 that lift respectively.Certainly, pipe fitting overhead gage 6 is also nonessentially installed on installing rack 18 just passablely, will on direct pipe fitting overhead gage 6 installation frame 1, be also feasible, and now the height of pipe fitting overhead gage 6 is still regulated by its corresponding lowering or hoisting gear, to meet the demand of different size core rod.
Under lower lifting piece comprises, lift plate 10, lower lead 27 be installed in frame 1, under lift plate 10 and be slidably mounted on lower lead 27, described lower stretching structure is arranged at down and lifts on plate 10.Certainly, the structure of lower lifting piece also can be arranged to identical with the structure of above-mentioned upper lifting piece.Due on lift plate 9, under to lift plate 10 be to be arranged on respectively on upper lead 19 and lower lead 27, therefore, above lift plate 9 and under lift plate 10 and can not shake, like this, just guarantee the quality of withdrawing pattern, also facilitate the matched moulds between core rod upper semi-body and core rod lower semi-body simultaneously.
Pipe fitting saddle 14 is also installed in frame 1; described pipe fitting saddle 14 is connected with the plane of pipe fitting lower baffle plate 7; first mobile so far pipe fitting saddle 14 places of pipe fitting after withdrawing pattern completes; in addition; frame 1 is provided with limiting buffer device 15; described limiting buffer device 15 limits core rod mount pad 4 in coiling position, and limiting buffer device 15 can be protected the spacing and movement protection of core rod mount pad.
In this area, 2 points of present normally used core rods comprise core rod upper semi-body and core rod lower semi-body two parts, and the coil winding machine of originally loosing core is mainly to design for this kind of core rod 2.
The process of electric capacity pipe fitting is as follows:
First, core rod 2 is installed on core rod mount pad 4, start lifting platform drive unit 21, core rod power set 5 rise to the bottom of driving shaft 22 conflicts to core rod mount pad 4, close lifting platform drive unit 21, stop lifting, if now axis 24 fails to engage with draw-in groove 25, owing to being pressed with in advance buffer spring 26 between main shaft 221 and axle sleeve 222, can drive driving shaft 22 rotations to adjust the position of axis 24 by core rod power set 5, until axis 24 engages completely with draw-in groove 25, these core rod power set 5 are preferably motor acceleration and deceleration device.
Then, under the driving of core rod power set 5, core rod 2 starts rotation coiling, after having wound the line, lifting platform drive unit 21 drives lifting platform 20 to decline, driving shaft 22 separates with axis hole 23, core rod 2 is unloaded from core rod mount pad 4, walk core rod 2 to injection mo(u)lding on injection machine by traveling crane, the cooled core rod 2 of moulding is re-installed on core rod mount pad 4, pin is installed at pin hole 3 places at core rod 2, promote core rod 2, core rod 2 and core rod mount pad 4 slide into withdrawing pattern position along delivery track 13, now two of core rod 2 ends pass from pipe fitting overhead gage 6 and pipe fitting lower baffle plate 7, pin snaps in hangers 16, pipe fitting snaps onto between pipe fitting overhead gage 6 and pipe fitting lower baffle plate 7 and limits its displacement.Then start the upper and lower power set 8 that lift, upper lifting piece and lower lifting piece withdrawing pattern, pipe fitting is separated with core rod 2, come off after core rod 2 until pipe fitting, operating personnel are pushed into pipe fitting on pipe fitting saddle 14, now core rod 2 is divided into core rod upper semi-body and core rod lower semi-body two parts under the lifting of upper lifting piece and lower lifting piece, starts the upper and lower power set 8 that lift, and core rod upper semi-body and core rod lower semi-body are carried out to matched moulds.
After matched moulds completes, the coiling position originally that core rod 2 and core rod mount pad 4 are pushed into together, disassembles the pin in pin hole 3, repeats above-mentioned coiling, withdrawing pattern, matched moulds process.
In the time of pipe fitting size especially height change, can adjust the height of pipe fitting overhead gage 6 by adjusting leading screw and nut mechanism 12, thereby can meet the demand of different size pipe fitting.
In addition, the delivery track 13 of originally loosing core in coil winding machine can entirety be a track, also the part of withdrawing pattern position and other parts can be separated, be that delivery track 13 is made up of two parts, one section is arranged in frame, another section is arranged on down and lifts on plate 10, core rod mount pad 4 can slide into down smoothly lift on plate and with under lift plate and move downward.
Claims (10)
1. the coil winding machine of loosing core, is characterized in that: comprise frame, Winder, core-pulling device and be arranged at Winder and core-pulling device between delivery track; This Winder comprises core rod mount pad and the core rod power set that drive core rod mount pad to rotate, and core rod mount pad is slidably mounted on delivery track, between described core rod power set and core rod mount pad, is provided with power clutch mechanism; Core-pulling device, comprises upper lifting piece for upwards lifting core rod upper semi-body, for lifting the lower lifting piece of core rod lower semi-body downwards, for coordinating the pipe fitting overhead gage and the pipe fitting lower baffle plate that stop pipe fitting motion; Described pipe fitting overhead gage and pipe fitting lower baffle plate are all installed in frame, and described upper lifting piece is vertically slidably mounted in frame and is positioned at the top of pipe fitting overhead gage, and described lower lifting piece is vertically slidably mounted in frame and is positioned at the below of pipe fitting lower baffle plate; Pipe fitting overhead gage and pipe fitting lower baffle plate are equipped with the opening that can pass for core rod; Upper lifting piece is provided with the upper stretching structure that can be connected or depart from core rod upper semi-body, and lower lifting piece is provided with the lower stretching structure that can be connected or depart from core rod lower semi-body; Upper lifting piece and lower lifting piece are driven by the upper and lower power set that lift respectively.
2. the coil winding machine of loosing core as claimed in claim 1, it is characterized in that: described upper lifting piece comprises and lifts plate and installing rack, described frame is provided with head tree, installing rack is installed on head tree, described installing rack is provided with lead, on described, lift plate and be slidably mounted on lead, upper stretching structure is arranged at and lifts on plate, lifts power set on described to be installed on installing rack.
3. the coil winding machine of loosing core as claimed in claim 2, is characterized in that: described installing rack is slidably mounted on head tree, between installing rack and frame, be provided with lowering or hoisting gear, described pipe fitting overhead gage is fixed on installing rack.
4. the coil winding machine of loosing core as claimed in claim 3, is characterized in that: under described lower lifting piece comprises, lift plate, lower lead be installed in frame, under lift plate and be slidably mounted on lower lead, described lower stretching structure is arranged at down and lifts on plate.
5. the coil winding machine of loosing core as claimed in claim 4, is characterized in that: described upper stretching structure comprises one group of hangers, and this hangers is fixed on the bottom that lifts plate, and corresponding core rod upper semi-body is provided with pin hole, between this hangers and core rod upper semi-body, is connected by latch; Described lower stretching structure comprises one group of hangers, and this hangers is fixed on down the top that lifts plate, and corresponding core rod lower semi-body is provided with pin hole, between the hangers of lower stretching structure and core rod lower semi-body, is connected by latch.
6. the coil winding machine of loosing core as described in claim 1 to 5 any one, it is characterized in that: described power clutch mechanism comprises lifting platform, lifting platform drive unit and driving shaft, these core rod power set are installed on lifting platform, described driving shaft is connected with the clutch end of core rod power set, this lifting platform drives lifting by lifting platform drive unit, and the end of this driving shaft is provided with core rod mount pad and coordinates the drive mechanism being in transmission connection.
7. the coil winding machine of loosing core as claimed in claim 6, it is characterized in that: described drive mechanism comprises the axis of the end that is arranged on driving shaft, the bottom cooperation of corresponding core rod mount pad is provided with the axis hole that holds driving shaft, and this axis hole sidewall is provided with the draw-in groove with axis corresponding matching.
8. the coil winding machine of loosing core as claimed in claim 7, it is characterized in that: described driving shaft comprises main shaft and axle sleeve, described main shaft is connected with core rod power set, described axle sleeve be set on main shaft and with main shaft spline joint, described axis is arranged on axle sleeve, is pressed with in advance buffer spring between described main shaft and axle sleeve.
9. the coil winding machine of loosing core as claimed in claim 8, is characterized in that: pipe fitting saddle is also installed in described frame, and described pipe fitting saddle is connected with the plane of pipe fitting lower baffle plate.
10. the coil winding machine of loosing core as claimed in claim 9, is characterized in that: described frame is provided with limiting buffer device, and described limiting buffer device restriction core rod mount pad is in coiling position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310033053.9A CN103072240B (en) | 2013-01-29 | 2013-01-29 | Core-pulling winding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310033053.9A CN103072240B (en) | 2013-01-29 | 2013-01-29 | Core-pulling winding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103072240A CN103072240A (en) | 2013-05-01 |
| CN103072240B true CN103072240B (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310033053.9A Active CN103072240B (en) | 2013-01-29 | 2013-01-29 | Core-pulling winding machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN103072240B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109228392A (en) * | 2018-09-28 | 2019-01-18 | 华创天元实业发展有限责任公司 | A kind of steel skeleton polyethylene plastic composite pipe electric smelting winding core-pulling device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922773B (en) * | 2018-08-30 | 2024-02-23 | 福州可源电子有限公司 | Winding equipment |
| CN109454808B (en) * | 2018-12-10 | 2024-04-09 | 江苏双腾管业有限公司 | Wire winding lifting device for mold core of electric melting pipe fitting |
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|---|---|---|---|---|
| EP0396273A2 (en) * | 1989-05-03 | 1990-11-07 | Fusion Group Plc | Electro-fusion fittings |
| CN101025245A (en) * | 2006-02-20 | 2007-08-29 | 潘刚 | All-enclosuring type electric melting pipe piece and mfg. method |
| CN201644549U (en) * | 2010-03-22 | 2010-11-24 | 四川煌盛管业有限公司 | Electric smelting pipe coiling device |
| CN203046162U (en) * | 2013-01-29 | 2013-07-10 | 江苏双腾管业有限公司 | Core-pulling winding machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11325368A (en) * | 1998-05-15 | 1999-11-26 | Hitachi Metals Ltd | Electrically fused pipe joint |
-
2013
- 2013-01-29 CN CN201310033053.9A patent/CN103072240B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0396273A2 (en) * | 1989-05-03 | 1990-11-07 | Fusion Group Plc | Electro-fusion fittings |
| CN101025245A (en) * | 2006-02-20 | 2007-08-29 | 潘刚 | All-enclosuring type electric melting pipe piece and mfg. method |
| CN201644549U (en) * | 2010-03-22 | 2010-11-24 | 四川煌盛管业有限公司 | Electric smelting pipe coiling device |
| CN203046162U (en) * | 2013-01-29 | 2013-07-10 | 江苏双腾管业有限公司 | Core-pulling winding machine |
Non-Patent Citations (1)
| Title |
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| JP特开平11325368A 1999.11.26 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109228392A (en) * | 2018-09-28 | 2019-01-18 | 华创天元实业发展有限责任公司 | A kind of steel skeleton polyethylene plastic composite pipe electric smelting winding core-pulling device |
| CN109228392B (en) * | 2018-09-28 | 2020-07-17 | 华创天元实业发展有限责任公司 | Electric melting winding core-pulling device for steel skeleton polyethylene plastic composite pipe |
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| CN103072240A (en) | 2013-05-01 |
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