CN102069585A - Biaxial synchronous orientation stretcher - Google Patents
Biaxial synchronous orientation stretcher Download PDFInfo
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- CN102069585A CN102069585A CN2010105938782A CN201010593878A CN102069585A CN 102069585 A CN102069585 A CN 102069585A CN 2010105938782 A CN2010105938782 A CN 2010105938782A CN 201010593878 A CN201010593878 A CN 201010593878A CN 102069585 A CN102069585 A CN 102069585A
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Abstract
The invention discloses a biaxial synchronous orientation stretcher, which comprises a stand, a transmission, a track device, a membrane support device, a chain clip device, an amplitude modulation device, a clip pressing device, a clip cooling system, a lubrication system, a heated air circulation system, a clip opening device, a chip blowing device and an electrical control device, wherein the membrane support device is arranged at the inlet of the chain clip device; the amplitude modulation device is connected with a bottom plate of the stand; the clip pressing device and the clip cooling device are arranged on the bottom plate of the track device; the clip opening device is connected with the inlet/outlet of the track device; and the chip blowing device is arranged at the outlet of the track device. By adopting the biaxial synchronous orientation stretcher, the traditional process that a high molecular membrane is gradually stretched in the past is fundamentally changed, three-dimensional synchronous stretching molding of the stretcher is realized in equipment and the problems of the special processing technology of a high molecular material which is difficult to gradually stretch and orient are solved. The invention has a simple process flow, a reasonable structure, lower comprehensive investment cost and low maintenance cost.
Description
Technical field
The present invention relates to high-energy battery barrier film and processing high-grade, the wide cut plastic film in the field of plastics processing, relate in particular to the synchronous orientation stretching machine of a kind of twin shaft.
Background technology
Traditional film stretching is for stretching one by one, this stretching needs vertical earlier horizontal the drawing in back of drawing, between vertical machine drawing and transverse stretching machine, also need hauling machine, auxiliary device and devices such as deviation correcting device, equipment manufacturing cost is increased, customer investment is too much, and increased, the consumption of oil or steam equal energy source, and the process of the heating of this drawing process heating for multiple times-cooling one by one-again, heating and cooling so repeatedly make plastics produce degraded easily, performance to material itself causes damage, the quality of goods also can be had a greatly reduced quality, the synchronous orientation stretching machine of this twin shaft is the new product with independent intellectual property rights of my company's independent research, also have only a few famous big company to produce in the world, since researching and developing successfully in April, 2005, normally moved for 5 years, so far still blank at home, this machine can make macromolecular material realize synchronous biaxial oriented stretch, has higher science using value, it has fundamentally changed the traditional handicraft that macromolecule diaphragm in the past stretches one by one, make it in this equipment, realize three-dimensional three-dimensional synchro-draw film forming, the appearance of the synchronous orientation stretching machine of twin shaft, also solved the special process issues of the macromolecular material that is difficult to one by one stretch orientation, than traditional stretcher, the synchro-draw facility have technological process to simplify, rational in infrastructure, the comprehensive method of investment cost of equipment is lower, use and maintenance cost are low, goods have high added value, advantages such as remarkable in economical benefits.
Summary of the invention
The purpose of this invention is to provide that a kind of technological process is simplified, comprehensive method of investment cost rational in infrastructure, equipment is lower, use and maintenance cost is low, goods have high added value, the synchronous orientation stretching machine of remarkable in economical benefits twin shaft.
The technical scheme that the present invention is adopted for achieving the above object is: the synchronous orientation stretching machine of a kind of twin shaft, comprise frame (11), lubricating system (8) and electric-control system, also include holder film device (1), transmission device (2), rail set (3), chain clamp device (4), amplitude modulation apparatus (5), press clamp device (6), clip cooling system (7), hot air circulating system (9), open clamp device (10) and bits blower (12), described holder film device (1) is arranged at the import department of chain clamp device (4), rail set (3) is installed on the frame (11), amplitude modulation apparatus (5) is connected on the base plate of frame (11), press clamp device (6), clip cooling system (7) is installed on the base plate of rail set (3), open clamp device (10) and be connected with the import and export of rail set (3), bits blower (12) is arranged on the exit of rail set (3).
Described holder film device (1) mainly is made up of subiculum template, upper left plate, upper right plate, lowering or hoisting gear and left and right sides adjusting device.
Described transmission device (2) mainly is made up of motor (24), main gear reducer (21), angle reductor (26), power transmission shaft (23), preceding driving device (22), back driving device (25), bilateral chain gear apparatus, overload protection arrangement, ball spline device, hand-barring, tensioning apparatus, transmission component, support and coupling assembly.
Described rail set (3) mainly is made up of support, track plate, track, linkage unit and positioning unit.
Described chain clamp device (4) mainly is made up of clamp assembly, anti-attrition assembly and chain supporting component.
Described amplitude modulation apparatus (5) is mainly supported by amplitude modulation handwheel, amplitude modulation leading screw, leading screw and adjusting nut is formed.
Described pressure clamp device (6) mainly is made up of pressing plate, clamping plate, connecting plate and attachment screw.
Described clip cooling system (7) mainly is made up of motor, blower fan and stay-warm case.
Described hot air circulating system (9) mainly is made up of insulated building, heat exchange unit, plenum chamber, the adjustable tuyere of narrow slit type, motor, blower fan and connecting pipe, described insulated building be arranged on frame (11) around.
The described clamp device (10) of opening mainly is made up of preceding grip opener, back grip opener and coupling assembly.
Described bits blower (12) mainly is made up of motor, blower fan, tuyere and gathering system.
Described transmission device (2) mainly is made up of motor (24), main gear reducer (21), angle reductor (26), power transmission shaft (23), preceding driving device (22) and back driving device (25).
The synchronous orientation stretching machine of twin shaft of the present invention has following advantage:
1, solved and to have finished the special process issues of the macromolecular material of orientation in length and breadth by stretching one by one, used specialty more;
2, twice stretching united two into one, simplified technological process, the performance aspect energy-saving and emission-reduction is outstanding;
3, stretch to need vertical earlier horizontal the drawing in back of drawing one by one, vertical draw and horizontal drawing between also need auxiliary device and devices such as hauling machine, deviation correcting device.Unit and devices such as longitudinal stretching machine, hauling machine have been cancelled in synchro-draw, and the cost of equipment reduces greatly, and customer investment reduces;
4, when having cancelled longitudinal stretching machine, also has cancelled thereupon at the powerful deep fat station or steam boiler and huge refrigeration system of adding, in longitudinal stretching, add hot-stretch, cooling, technological process such as stable, in this heating-cooling procedure repeatedly, power consumption is very big, the cost of goods improves thereupon, adopt these the middle consumption of synchro-draw technology not have, the cost of goods has also reduced, and economic benefit has also improved;
5, stretch more one by one and the technology of synchro-draw, in the production process of goods, the former Duos the process of the heating of once heating-cooling-more at least than the latter, heating and cooling repeatedly easily make plastics produce degraded, performance to material itself causes damage, and the quality of goods also can be had a greatly reduced quality;
6, adopt the synchro-draw technology, can farthest reduce the consumption of electricity, oil or these energy of steam, when saving cost, also significantly reduced of the pollution of the waste gas of oil or steam boiler generation when burning, very be beneficial to environmental protection atmosphere;
7, a large amount of maintenance costs has also been saved in the simplification of technological process, high-power deep fat station or steam boiler have been cancelled, got rid of the secondary pollution that the run, drip, leak of heating and cooling systems cause to the workshop, reduced the temperature in workshop, the air-conditioning power in workshop is also reduced greatly, and help safe, the fire prevention of workshop equipment, the floor space of equipment also reduces greatly, energy-saving and cost-reducing, rational and effective is utilized the energy and space;
8, according to different materials or different track and the chain folders of user demand design, the running orbit of clip is stretched according to the desired draw ratio of different macromolecular materials, do not need to add in addition motor or other energy.
Description of drawings
Fig. 1 is the synchronous orientation stretching machine of a kind of twin shaft of a present invention front view.
Fig. 2 is the synchronous orientation stretching machine of a kind of twin shaft of a present invention vertical view.
Fig. 3 is the synchronous orientation stretching machine of a kind of twin shaft of the present invention transmission structures figure.
Among the figure: 1, holder film device; 2, transmission device; 3, rail set; 4, chain clamp device; 5, amplitude modulation apparatus; 6, press clamp device; 7, clip cooling system; 8, lubricating system; 9, hot air circulating system; 10, open clamp device; 11, frame; 12, bits blower; 21, main gear reducer; 22, preceding driving device; 23, power transmission shaft; 24, motor; 25, back driving device; 26, angle reductor.
The specific embodiment
As Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, comprise holder film device 1, transmission device 2, rail set 3, chain clamp device 4, amplitude modulation apparatus 5, press clamp device 6, clip cooling system 7, lubricating system 8, hot air circulating system 9, open clamp device 10, frame 11, bits blower 12, holder film device 1 is arranged at the import department of chain clamp device 4, to help the film parison to enter stretching device smoothly and to be clipped by clip, rail set 3 is installed on the frame 11, amplitude modulation apparatus 5 is connected on the base plate of frame 11, press clamp device 6, clip cooling system 7 is installed on the base plate of rail set 3, opening clamp device 10 is connected with the import and export of rail set 3, bits blower 12 is arranged on the exit of rail set 3, with the film chip from folder mouth blow down and collection and crumb bag, frame is the skeleton of stretching-machine, rail set 3 just is installed on the frame 11, chain clamp device 4 is under the driving of transmission device 2, move along track order, finish whole drawing process, holder film device 1 is mainly by the subiculum template, upper left plate, upper right plate, lowering or hoisting gear and left and right sides adjusting device are formed, and the function of holder film device is the unit upstream is extruded or to cast good diaphragm centering, send into stably in the chain clamp device 4; Transmission device 2 mainly is made up of motor 24, main gear reducer 21, angle reductor 26, power transmission shaft 23, preceding driving device 22, back driving device 25, bilateral chain gear apparatus, overload protection arrangement, ball spline device, hand-barring, tensioning apparatus, transmission component, support and coupling assembly, angle reductor 26 is installed on the frame 11, preceding driving device 22 and back driving device 25 are installed on the sole-plate of rail set 3, transmission device is installed in respectively on transmission bracket and the frame, and the function of this device is to provide stable speed support for system; Rail set 3 mainly is made up of support, track plate, track, linkage unit and positioning unit, and the track plate includes track pad and sole-plate, and the function of rail set 3 is two-dimentional draw ratios that setting is provided for film; Chain clamp device 4 mainly is made up of clamp assembly, anti-attrition assembly and chain supporting component, and this chain clamp device 4 can move on rail set 3, and its function also provides the draw ratio of setting for film except that clamping diaphragm firmly; Amplitude modulation apparatus 5 is mainly supported by amplitude modulation handwheel, amplitude modulation leading screw, leading screw and adjusting nut is formed, and amplitude modulation apparatus is installed on the sole-plate, and its function is to provide transformable goods width for the user; Press clamp device 6 mainly to be made up of pressing plate, clamping plate, connecting plate and attachment screw, its function is the stability that guarantees the operation of chain clipping system; Clip cooling system 7 mainly is made up of motor, blower fan and stay-warm case, and its function is in the backhaul of chain folder it to be cooled off, and is controlled in the scope of setting with the temperature that ensures the chain folder; Lubricating system 8 mainly is made up of lubrication station, nozzle unit, bearing and control module, and its function is to guarantee the lubricated and stable operation between friction pair under high speed of this machine; Hot air circulating system 9 mainly is made up of insulated building, heat exchange unit, plenum chamber, the adjustable tuyere of narrow slit type, motor, blower fan and connecting pipe, insulated building be arranged on frame 11 around, this hot air circulating system is unified except motor, main transmission the handwheel of adjusting device, remaining parts all is installed in the insulated building, the major function of hot air circulating system is to can be this machine to provide and ensure constant process conditions, to satisfy the drawing process requirement; Open clamp device 10 and mainly be made up of preceding grip opener, back grip opener and coupling assembly, its function is to guarantee that the chain folder presss from both sides mouth and opens in the position of setting; Bits blower 12 mainly is made up of motor, blower fan, tuyere and gathering system, and its function is to remove the chip of chain clamp device folder mouth, for the workshop provides clean environment; Electric-control system is included as this machine power source is provided, simultaneously for automatic intensification, temperature control, the stable operation according to the order of sequence of this machine, throw light on, open the door, overload-alarm etc. provides necessary chain and electrical safety guarantee.
The synchronous orientation stretching machine of twin shaft of the present invention operation principle is: the synchronous orientation stretching machine of twin shaft is by motor-driven, major axis drive line angle reductor by transmission device, power is delivered to the preceding driving device and the back driving device of transmission device respectively, by preceding, the secondary transmission of rear drive equipment, driving the chain clamp device moves, under stable process conditions, the synchronous orientation stretching machine of twin shaft is extruded the stretching unit with plastic sheeting and is cast good diaphragm along length, wide, high three-dimensional, carry out three-dimensional orientation stretching-film forming by the draw ratio of setting, thereby produce the needed goods of user, whole process is convenient, fast, stable.The synchronous orientation stretching machine of this twin shaft has fundamentally changed traditional handicraft-elder generation that macromolecule diaphragm in the past stretches to be indulged and draws the horizontal drawing process one by one that draws again, because the key component clip of this machine and track and traditional stretching-machine one by one have basic different, make it in this equipment, can realize three-dimensional three-dimensional synchro-draw, one-pass film-forming has solved the processing difficult problem of the plastic products that can't reach instructions for use by stretching one by one; Reduced the equipment configuration quantity of stretched plastic film unit to greatest extent, the unit of using the synchronous orientation stretching machine of twin shaft can be cancelled longitudinal stretching machine, configurations such as the hauling machine between stretching, some groups of powerful deep fat stations, temperature control cooling system, at least 1 group deviation correcting device one by one, reducing the up-front investment cost and the later stage of whole unit uses and maintenance cost, comprise that floor space reduces, maintenance minimizing of equipment, trouble point minimizing, power consumption reduction, energy-saving and emission-reduction, reduction personnel labor cost or the like, also can reduce the secondary pollution of workshop; Synchronous 1 drawing and forming of twin shaft can not cause damage to material property, and the product property of production is good, and is good in economic efficiency.
The course of work of synchro-draw machine of the present invention: mechanical movement part, the plastic parison of extruding or hydrostomia comes out is sent in the chain clamp device 4 by holder film device 1, under the effect of import grip opener, the folder mouth of chain folder is opened automatically, the film parison contained in the folder mouth clip, under the driving of transmission system, chain clamp device 4 moves forward along the track order of rail set 3, because the motion track of chain clamp device 4 is subjected to the restriction of rail set 3 all the time, thereby diaphragm is stretched according to the draw ratio of setting under this restriction, when the chain folder moves to the track export place, because the effect of outlet grip opener, the folder mouth of chain folder is opened automatically, film is released, left this machine, under the traction of follow-up equipment, continue operation forward, the running orbit of stretching-machine is the polygon track of a sealing, it is made up of two parts, we press from both sides the orbit segment of realizing stretch function that travels forward to chain and call process, and return phase is called backhaul, clip cooling system 7 just is arranged in the backhaul, is connected with cold wind in clip cooling system 7, and it makes the chain that is heated in hot air circulating system hold due cooling, and then the process that enters into is gone, clip diaphragm once more, so move in circles, can orbit stably for making the chain clamp device, on the backing plate of rail set 3, be equipped with and press clamp device 6, in case locking system under fast state, produce beat or derail, lubricating system 8 is arranged on the exit position of stretching-machine, by nozzle, the hinge fraction jet lubrication oil that can regularly press from both sides to chain; The drawing process part, after the film parison enters the chain folder, entered immediately in the insulated building of hot air circulating system 9, whole drawing process comprises: preheating, stretch, the typing three parts, according to different raw materials, each section ratio of three parts can change to some extent, technological parameters such as the temperature of each several part and wind speed, can set hot air circulating system according to the difference of raw material, under the control of electric-control system, hot air circulating system 9 can be sent into hot blast that satisfies technological requirement and the cold wind set in the plenum chamber, and blows out with certain pressure and speed, with the film heating and cooling to preparing to stretch and stretch and finish.
Claims (12)
1. synchronous orientation stretching machine of twin shaft, comprise frame (11), lubricating system (8) and electric-control system, it is characterized in that: also include holder film device (1), transmission device (2), rail set (3), chain clamp device (4), amplitude modulation apparatus (5), press clamp device (6), clip cooling system (7), hot air circulating system (9), open clamp device (10) and bits blower (12), described holder film device (1) is arranged at the import department of chain clamp device (4), rail set (3) is installed on the frame (11), amplitude modulation apparatus (5) is connected on the base plate of frame (11), press clamp device (6), clip cooling system (7) is installed on the base plate of rail set (3), open clamp device (10) and be connected with the import and export of rail set (3), bits blower (12) is arranged on the exit of rail set (3).
2. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: described holder film device (1) mainly is made up of subiculum template, upper left plate, upper right plate, lowering or hoisting gear and left and right sides adjusting device.
3. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: described transmission device (2) mainly is made up of motor (24), main gear reducer (21), angle reductor (26), power transmission shaft (23), preceding driving device (22), back driving device (25), bilateral chain gear apparatus, overload protection arrangement, ball spline device, hand-barring, tensioning apparatus, transmission component, support and coupling assembly.
4. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: described rail set (3) mainly is made up of support, track plate, track, linkage unit and positioning unit.
5. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: described chain clamp device (4) mainly is made up of clamp assembly, anti-attrition assembly and chain supporting component.
6. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: described amplitude modulation apparatus (5) is mainly supported by amplitude modulation handwheel, amplitude modulation leading screw, leading screw and adjusting nut is formed.
7. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: described pressure clamp device (6) mainly is made up of pressing plate, clamping plate, connecting plate and attachment screw.
8. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: described clip cooling system (7) mainly is made up of motor, blower fan and stay-warm case.
9. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1, it is characterized in that: described hot air circulating system (9) mainly is made up of insulated building, heat exchange unit, plenum chamber, the adjustable tuyere of narrow slit type, motor, blower fan and connecting pipe, described insulated building be arranged on frame (11) around.
10. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: the described clamp device (10) of opening mainly is made up of preceding grip opener, back grip opener and coupling assembly.
11. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: described bits blower (12) mainly is made up of motor, blower fan, tuyere and gathering system.
12. the synchronous orientation stretching machine of a kind of twin shaft according to claim 1 is characterized in that: described lubricating system (8) mainly is made up of lubrication station, nozzle unit, bearing and control module.
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| CN2010105938782A CN102069585A (en) | 2010-12-17 | 2010-12-17 | Biaxial synchronous orientation stretcher |
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| CN2010105938782A CN102069585A (en) | 2010-12-17 | 2010-12-17 | Biaxial synchronous orientation stretcher |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343669A (en) * | 2011-10-27 | 2012-02-08 | 万达集团股份有限公司 | Bidirectional drawing machine for polymide films |
| CN102632610A (en) * | 2012-04-24 | 2012-08-15 | 大连橡胶塑料机械股份有限公司 | Manually-operated turning gear of synchronous drawing machine |
| CN102756472A (en) * | 2012-08-03 | 2012-10-31 | 青岛江山旭机器制造有限公司 | BOPET (Biaxially Oriented Stretching Polyester Film) biaxially oriented stretching sheet transmission |
| CN102848568A (en) * | 2012-09-21 | 2013-01-02 | 青岛顺德塑料机械有限公司 | External guide rail system for BOPVA (biaxially oriented polyvinyl alcohol) sheets |
| CN103302849A (en) * | 2013-06-07 | 2013-09-18 | 大连橡胶塑料机械股份有限公司 | Synchronous stretcher amplitude modulating device |
| CN103978673A (en) * | 2014-04-30 | 2014-08-13 | 宁波东旭成新材料科技有限公司 | Novel thin film transverse stretching machine |
| CN104797402A (en) * | 2013-05-13 | 2015-07-22 | 建梁Itt株式会社 | Cover sheet supply apparatus having variable clamp for thermoforming machine |
| CN107351369A (en) * | 2017-07-05 | 2017-11-17 | 大连理工大学 | A kind of design method of the plenum chamber group with flaring profiled orifice plate |
| CN110065841A (en) * | 2019-05-23 | 2019-07-30 | 苟秀防 | A kind of isolated conveying device of film drawer cabinet |
| CN110744807A (en) * | 2019-10-14 | 2020-02-04 | 浙江洁美电子科技股份有限公司 | Production process of BOPET (biaxially-oriented polyethylene terephthalate) base film and BOPET base film prepared by production process |
| CN111170054A (en) * | 2018-11-12 | 2020-05-19 | 平野技研工业株式会社 | Tenter device and heat treatment device using same |
| CN115195095A (en) * | 2022-05-17 | 2022-10-18 | 中材锂膜有限公司 | High-safety stretching device for wet-process synchronous lithium ion battery diaphragm |
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| CN202045869U (en) * | 2010-12-17 | 2011-11-23 | 大连橡胶塑料机械股份有限公司 | Biaxial synchronous directional drawing machine |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343669A (en) * | 2011-10-27 | 2012-02-08 | 万达集团股份有限公司 | Bidirectional drawing machine for polymide films |
| CN102632610A (en) * | 2012-04-24 | 2012-08-15 | 大连橡胶塑料机械股份有限公司 | Manually-operated turning gear of synchronous drawing machine |
| CN102632610B (en) * | 2012-04-24 | 2015-09-09 | 大连橡胶塑料机械股份有限公司 | Synchro-draw machine hand-barring |
| CN102756472A (en) * | 2012-08-03 | 2012-10-31 | 青岛江山旭机器制造有限公司 | BOPET (Biaxially Oriented Stretching Polyester Film) biaxially oriented stretching sheet transmission |
| CN102756472B (en) * | 2012-08-03 | 2014-12-24 | 青岛江山旭机器制造有限公司 | BOPET (Biaxially Oriented Stretching Polyester Film) biaxially oriented stretching sheet transmission |
| CN102848568A (en) * | 2012-09-21 | 2013-01-02 | 青岛顺德塑料机械有限公司 | External guide rail system for BOPVA (biaxially oriented polyvinyl alcohol) sheets |
| CN104797402A (en) * | 2013-05-13 | 2015-07-22 | 建梁Itt株式会社 | Cover sheet supply apparatus having variable clamp for thermoforming machine |
| CN103302849B (en) * | 2013-06-07 | 2015-08-26 | 大连橡胶塑料机械股份有限公司 | Synchro-draw machine amplitude modulation apparatus |
| CN103302849A (en) * | 2013-06-07 | 2013-09-18 | 大连橡胶塑料机械股份有限公司 | Synchronous stretcher amplitude modulating device |
| CN103978673A (en) * | 2014-04-30 | 2014-08-13 | 宁波东旭成新材料科技有限公司 | Novel thin film transverse stretching machine |
| CN107351369A (en) * | 2017-07-05 | 2017-11-17 | 大连理工大学 | A kind of design method of the plenum chamber group with flaring profiled orifice plate |
| CN107351369B (en) * | 2017-07-05 | 2019-03-05 | 大连理工大学 | A kind of design method of the plenum chamber group with flaring profiled orifice plate |
| CN111170054A (en) * | 2018-11-12 | 2020-05-19 | 平野技研工业株式会社 | Tenter device and heat treatment device using same |
| CN110065841A (en) * | 2019-05-23 | 2019-07-30 | 苟秀防 | A kind of isolated conveying device of film drawer cabinet |
| CN110744807A (en) * | 2019-10-14 | 2020-02-04 | 浙江洁美电子科技股份有限公司 | Production process of BOPET (biaxially-oriented polyethylene terephthalate) base film and BOPET base film prepared by production process |
| CN115195095A (en) * | 2022-05-17 | 2022-10-18 | 中材锂膜有限公司 | High-safety stretching device for wet-process synchronous lithium ion battery diaphragm |
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Application publication date: 20110525 |