CN205419220U - Vacuum traction device - Google Patents
Vacuum traction device Download PDFInfo
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- CN205419220U CN205419220U CN201521047043.1U CN201521047043U CN205419220U CN 205419220 U CN205419220 U CN 205419220U CN 201521047043 U CN201521047043 U CN 201521047043U CN 205419220 U CN205419220 U CN 205419220U
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Abstract
The utility model provides a vacuum traction device, including vacuum carry over pinch rolls, driving motor and shaft coupling, driving motor with the vacuum carry over pinch rolls passes through the coupling joint, driving motor be used for through the shaft coupling drive the vacuum carry over pinch rolls, the vacuum carry over pinch rolls is equipped with the vacuum adsorption district, the vacuum carry over pinch rolls is used for adsorbing to be treated trailing material and makes treat trailing material cladding the vacuum adsorption district, the vacuum carry over pinch rolls drives treat the synchronous rotation of trailing material. The utility model provides a vacuum traction device passes through the vacuum carry over pinch rolls and has realized the effective isolation to material position and tensile fluctuation, has solved material easy slipping's problem simultaneously, realized tension automated inspection through tension sensor in addition and through controller and driving motor adjustment vacuum carry over pinch rolls rotational speed and then regulation material tension and traction force, having solved material tension, undulant and traction force is uncontrollable and then result in the defect that the material easily broke.
Description
Technical field
This utility model relates to various functional membrane coating field of compounding, particularly to a kind of vacuum traction apparatus.
Background technology
In coating waste water field, after glue is coated onto the surface of the sheet carrying materials such as all types of plastic film, paper, aluminium foil, it is often necessary to carry out drying and processing through online baking oven, in order to reach specific technological requirement.Such as, PE mesh film coated nano level aluminium oxide and dried, thus increases mesh film strength, temperature tolerance etc., being fabricated to lithium battery diaphragm；By foam paper gluing, drying, thus manufacture foam tape；By PVC film surface coating, dry and cure process, so that material has wear-resisting, scratch-resistant characteristic, such as the cured film on Mobile phone screen.
In the equipment that gluing is dried, the length of baking oven is the longest, the general length having more than 10 meters, and oven interior is due to the high traction apparatus typically all not having to be isolated by tension force of temperature, and in baking oven, having bigger hot air flow, the fluctuation causing material position in baking oven and tension force is the biggest.Simultaneously as the temperature that material is in baking oven is higher, the elastic modelling quantity of material is less, it is easy to be stretched deformation.It addition, the position of baking oven installation is the highest, material entrance after the baking oven out rear turning downwards of needs mostly is placed in the wrap-up on ground, thus form the corner in about 90 ° of baking oven exit, easy tractive resistance formed here, draws bad by material.These are required for accurately controlling tension force and the position of material in baking oven, are also required to the fluctuation of material in baking oven be completely cut off, in order to avoid affecting the PROCESS FOR TREATMENT of later process simultaneously.Further need exist for traction power, in order to avoid breaking material in baking oven exit.
Use at present and traction apparatus is set in baking oven exit typically has two kinds, the Ω type traction apparatus shown in deviation rectification roller device as shown in Figure 1 and Fig. 2.
There is following defect in existing deviation rectification roller device: the first, easily draws bad material；The second, in baking oven, the position of material and the fluctuation of tension force can be delivered to next process；3rd, correction process in which materials breaks away seriously on deflector roll, is easily destroyed material edge.
There is following defect in the Ω type traction apparatus in existing baking oven exit: the first, pull strength and tension force and coefficient of friction positive correlation, and the fluctuation of tension force causes the fluctuation of pull strength, thus by the Wave transmission in baking oven to next operation, the most as easy as rolling off a log breaks material；The second, due to material in baking oven the longest, need bigger pull strength, this cornerite being accomplished by material and roller is very big, and material bending rate is excessive is easily damaged；3rd, in distraction procedure easily with material relative to swiping, thus abrade material surface.
Utility model content
The technical problems to be solved in the utility model be in order to overcome traction apparatus in prior art that positions of materials and tension fluctuation cannot be isolated, material easily skids and then abrades the defect that the pull strength of material surface and material is uncontrollable and then causes material easily to be broken, it is provided that a kind of vacuum traction apparatus that there is vac sorb traction function and the position of material and the fluctuation of tension force can be eliminated.
This utility model is to solve above-mentioned technical problem by following technical proposals:
A kind of vacuum traction apparatus, its feature is, including vacuum carry-over pinch rolls, drive motor and shaft coupling, described driving motor is connected by described shaft coupling with described vacuum carry-over pinch rolls, described driving motor is for driving described vacuum carry-over pinch rolls by described shaft coupling, described vacuum carry-over pinch rolls are provided with vac sorb district, described vacuum carry-over pinch rolls for adsorbing material to be drawn and material to be drawn described in making is coated with described vac sorb district, described vacuum carry-over pinch rolls drive described in synchronous material to be drawn rotate.
In this programme, material is attracted to vacuum carry-over pinch rolls surface through the vac sorb district of vacuum carry-over pinch rolls the most afterwards from baking oven, owing to material is attracted to vac sorb district without breakking away, thus the position of material and the fluctuation of the tension force impact on the material after vacuum carry-over pinch rolls in eliminating baking oven, it is achieved that material input tension force before and after entering vacuum carry-over pinch rolls is effectively isolated with output tension force.It addition, drive motor to provide the transmission that uniform, controlled traction drives vacuum carry-over pinch rolls rotate and then drive material, it is to avoid material is easily drawn bad situation to occur because pull strength is uneven.Material is adsorbed on vacuum carry-over pinch rolls surface it can be avoided that material breaks away in transmitting procedure by vac sorb district, thus reduces the risk of scratch material surface, improves the yield rate of material.
Preferably, described vacuum traction apparatus also includes controller, tension pick-up and tension-sensing roller, described tension-sensing roller is for being delivered to described vacuum carry-over pinch rolls by described material to be drawn, described tension pick-up is for gathering the tension value through material to be drawn described in described tension-sensing roller, and described controller is used for receiving described tension value and sending rotary speed regulating signal according to described tension value to described driving motor.
In this programme, vacuum traction apparatus has automatic tension detection function, exports to subsequent processing after material is first after baking oven exports after tension-sensing roller and vacuum carry-over pinch rolls again.Wherein, tension pick-up is fed back to controller after collecting the tension value of material, and controller is by driving the rotating speed of motor regulation vacuum carry-over pinch rolls and then realizing the regulation of the tension force to material.In this programme, tension-sensing roller is relatively fixed with the position of vacuum carry-over pinch rolls, and the two realizes continuously every transmission, and tension force collection and response frequency and precision are high, thus avoids material and be pulled off during transmitting or deform.
It is preferred that described vacuum traction apparatus also includes decelerator, described driving motor regulates the rotating speed of described vacuum carry-over pinch rolls after receiving described rotary speed regulating signal by described decelerator.
In this programme, drive motor according to reporting the regulation signal rotating speed by decelerator regulation vacuum carry-over pinch rolls, realized the adjustment of the tension force of material in baking oven by the change of vacuum carry-over pinch rolls rotating speed.
It is preferred that described tension-sensing roller includes that the aluminum barrel on central fixed shaft, bearing and surface, described tension pick-up are connected with described central fixed shaft.
In this programme, material gathers for it by tension force passes to during the aluminum barrel surface of tension-sensing roller tension pick-up.
It is preferred that the cornerite between material to be drawn described in described tension-sensing roller and described tension-sensing roller is 5 ° to 30 °.
In this programme, material first in certain cornerite through tension-sensing roller, subsequently into vacuum carry-over pinch rolls.So material is through this device, can disposably realize position control, speed controlling and tension force and control, and material attitude stabilization, response accuracy and speed are the most high.
In this programme, tension force Cleaning Principle is as follows:
Make a concerted effort rule according to parallelogram, equation below: T0=T1/ [2*cos (α/2)] can be obtained.Wherein, α is cornerite, and T0 is the actual tension of material, and T1 is the tension value that tension pick-up collects, it is contemplated that the conduction of heat impact on tension force, and the general span of wrap angle sigma is 5 ° to 30 °, and 25 ° preferably.
It is preferred that through cornerite between material to be drawn and described vacuum carry-over pinch rolls described in described vacuum carry-over pinch rolls less than 90 °.
In this programme, owing to material is attracted to vacuum carry-over pinch rolls surface through vacuum carry-over pinch rolls, so the cornerite formed between material and vacuum carry-over pinch rolls need not the biggest, as long as controlling within 90 °, so solving cornerite in prior art and crossing conference and cause the excessive flimsy problem of material bending rate.
It is preferred that described vacuum traction apparatus also includes that correcting error guidance mechanism, described correcting error guidance mechanism include that added, base, position-detection sensor, servo push-rod and symmetric double slide rail are secondary；Described vacuum carry-over pinch rolls, described tension-sensing roller and described driving motor be fixed on described added on；Described added and described base is slidably connected by described symmetric double slide rail pair；Described position-detection sensor is for gathering the positional value of described vacuum carry-over pinch rolls, described controller is additionally operable to receive institute's location value and send position adjustments signal according to institute's location value to described servo push-rod, and described servo push-rod drives described added through the secondary slip on described base of described symmetric double slide rail according to described position adjustments signal.
In this programme, tension-sensing roller, vacuum carry-over pinch rolls and driving motor are fixedly arranged at above added, it is achieved vacuum carry-over pinch rolls only have this single-degree-of-freedom of rotating operation with the added of correcting error guidance mechanism.Position-detection sensor determines the position of material on vacuum carry-over pinch rolls by gathering the positional value of vacuum carry-over pinch rolls.The positional value of the vacuum carry-over pinch rolls collected is fed back to controller by position-detection sensor, controller drives servo push-rod motion according to this positional value, servo push-rod promotes the secondary slip on base of symmetric double slide rail according to this positional value, and then the position of regulation vacuum carry-over pinch rolls, the final regulation realizing the position to material.In this programme, correcting error guidance mechanism achieves the regulation to positions of materials fluctuation by driving tension-sensing roller to move together with vacuum carry-over pinch rolls.The kinematic geometry path of science is provided by symmetric double slide rail pair, by the both sides tension compensating equilibrium of material in baking oven, from source, reduces tension fluctuation and the positional fluctuation of material, improve the Forming Quality of material.
It is preferred that described symmetric double slide rail pair includes the slide rail being positioned on described base and is positioned at the slide block of slide rail, described added it is slidably connected with described base by described slide block.
In this programme, slide block can slide in slide rail, and the slip of slide block causes added slip fixed thereon, and then realizes vacuum carry-over pinch rolls and the regulation of positions of materials.
It is preferred that the angle scalable of the transverse axis of described slide rail and described slide rail place plane.
In this programme, the transverse axis of slide rail place plane refers to the transverse axis of top view when vacuum traction apparatus is normally placed.Distance when entering vacuum traction apparatus according to material can regulate described angle with discharging distance when leaving vacuum traction apparatus, and the best results material simultaneously of correction will not be pursed up.
It is preferred that described angle is 5 ° to 20 °.
Positive progressive effect of the present utility model is:
The vacuum traction apparatus that this utility model provides achieves being effectively isolated of fluctuation to positions of materials and tension force by vacuum carry-over pinch rolls, solves the problem that material easily skids simultaneously；Achieve tension force additionally by tension pick-up automatically detect and pass through controller and drive motor to adjust vacuum carry-over pinch rolls rotating speed and then regulation material tension and pull strength, solve material tension fluctuation and pull strength is uncontrollable and then the defect that causes material easily to be broken；Achieve the correction to positions of materials by correcting error guidance mechanism control and then avoid material wrinkling, improve the Forming Quality of material.
The vacuum traction apparatus that this utility model provides uses tension force to control, correction controls and vacuum traction integrated mechanical structure, and installation accuracy is high, shortens the closed loop corresponding time, improves control accuracy, it is to avoid material is pulled off, it is ensured that production efficiency.It addition, tension force controls balanced compensated with what the mating reaction of correction control achieved material tension cross-sectional distribution, eliminate material purse up, the defect such as stricture of vagina trace, improve the quality of material.Using the absorption traction of vacuum carry-over pinch rolls, material is being adsorbed through vacuum carry-over pinch rolls, by material in baking oven due to distinguished and admirable and the fluctuation that causes eliminates, allow material in baking oven be heated evenly and stable, product quality is higher.
Accompanying drawing explanation
Fig. 1 is the effect schematic diagram of existing deviation rectification roller device.
Fig. 2 is the effect schematic diagram of existing Ω type traction apparatus.
Fig. 3 is the structural representation of the vacuum traction apparatus of this utility model one preferred embodiment.
Fig. 4 is another structural representation of the vacuum traction apparatus of this utility model one preferred embodiment.
Fig. 5 is the use principle figure of the vacuum traction apparatus of this utility model one preferred embodiment.
Detailed description of the invention
Name preferred embodiment, and combine accompanying drawing and become apparent from intactly illustrating this utility model.
As shown in Figures 3 to 5, a kind of vacuum traction apparatus, including driving motor 1, vacuum carry-over pinch rolls 2, shaft coupling 3, decelerator 4, tension-sensing roller 5, tension pick-up 6, controller and correcting error guidance mechanism, the position of tension-sensing roller 5 and vacuum carry-over pinch rolls 2 is relatively fixed, and vacuum carry-over pinch rolls 2 are provided with vac sorb district 12.Wherein, tension-sensing roller 5 includes the aluminum barrel on central fixed shaft, bearing and surface.Correcting error guidance mechanism includes added 7, base 8, position-detection sensor 9, servo push-rod 11 and symmetric double slide rail pair 10, symmetric double slide rail pair 10 includes the slide rail being positioned on base 8 and is positioned at the slide block of slide rail, the angle δ scalable of the transverse axis of slide rail and slide rail place plane, angle δ span is 5 ° to 20 °.Wherein, the concrete structure of vacuum carry-over pinch rolls 2 can refer to Chinese patent application CN201420381297.6.
Drive motor 1 to pass sequentially through decelerator 4 and shaft coupling 3 is connected with vacuum carry-over pinch rolls 2.The two ends of the central fixed shaft of tension-sensing roller 5 are connected with the Kazakhstan not chuck of tension pick-up 6.Wait the material 14 drawn from baking oven out after after the tension force detection zone 13 of tension-sensing roller 5, be delivered to vacuum carry-over pinch rolls 2, vacuum carry-over pinch rolls 2 are adsorbed material 14 to be drawn by its vac sorb district 12 and are driven material 14 synchronous axial system to be drawn, and are conveyed subsequently for subsequent processing.Cornerite between material 14 to be drawn and tension-sensing roller 5 is 5 ° to 30 °, and the cornerite between material 14 to be drawn and vacuum carry-over pinch rolls 2 is less than 90 ° and cornerite scope covers all vac sorb district 12.Vacuum carry-over pinch rolls 2, tension-sensing roller 5 and driving motor 1 are fixed on added 7, added 7 and the slide block of symmetric double slide rail pair 10 affixed, slide block is positioned at the slide rail on base 8, servo push-rod 11 is by promoting slide block to slide in slide rail, thus realizes vacuum carry-over pinch rolls 2, tension-sensing roller 5 and the position adjustment of driving motor 1 being fixed on added 7.
Tension pick-up 6 is for gathering the tension value of the material 14 to be drawn of the aluminum barrel through tension-sensing roller 5 surface.Position-detection sensor 9 is for gathering the positional value of vacuum carry-over pinch rolls 2.Controller is for receiving the tension value and positional value collected；Controller according to tension value by driving motor 1 to adjust the rotating speed of vacuum carry-over pinch rolls 2 and then the adjustment of material 14 tension force of traction is treated in realization；Controller is according to the positional value received by driving servo push-rod 11 promote slide block to move on slide rail and then regulate the position of the vacuum carry-over pinch rolls 2 being fixed on added 7, and the final correction realizing treating material 14 position of traction adjusts.
In the present embodiment, as it is shown in figure 5, the operation principle of vacuum traction apparatus is as follows:
Material 14 to be drawn presents certain wrap angle sigma and passes through tension-sensing roller 5, and the tension signal of material 14 to be drawn is sampled by tension pick-up 6；Material 14 to be drawn presents certain cornerite β and passes through vacuum carry-over pinch rolls 2, and cornerite β envelopes vac sorb district 12 completely, and material 14 to be drawn is adsorbed on vacuum carry-over pinch rolls 2 surface and is driven operation by vacuum carry-over pinch rolls 2；Material 14 to be drawn is sampled through the position signalling of the material 14 that position-detection sensor 9 treats traction.Wherein parameter declaration is as follows:
L1: virtual torque of rectifying a deviation,
L2: vacuum pan feeding distance,
Patm: atmospheric pressure,
Pvac: vacuum carry-over pinch rolls 2 internal gas pressure.
Vacuum carry-over pinch rolls 2 moment of torsion realizes principle:
T=(Patm-Pvac) * S*f*R*K,
S: vac sorb district 12 area,
F: material and 2 friction coefficient of vacuum carry-over pinch rolls,
R: vacuum carry-over pinch rolls 2 radius surface,
K: correction factor.
Moment of torsion closed loop regulating time t=L2/V+Kt,
V: the linear velocity of material 14 to be drawn,
The dynamo-electric constant value of Kt: feedback,
In view of the ductility of material 14 to be drawn, material 14 width that the experience value of L2 generally 0.5 times is to be drawn.
Rectify a deviation and realize principle:
Operation geometry design according to correcting error guidance mechanism, usefulness of rectifying a deviation realizes, by rotating and two vectors of translation, wherein rotating and needing bond material operation to realize correction, and angle is directly proportional to effect, belongs to indirect action amount；Translation directly changes the position of material, belongs to direct actuating quantity.WhereinCorrection displacement path and angle for vacuum carry-over pinch rolls 2 and tension-sensing roller 5.
L0=2*L1*cos (δ/4), wherein L0 is translation vector.
The vacuum traction apparatus of the present embodiment has the effect that
The first, tension force controls, correction controls and vacuum traction integrated mechanical structure, and installation accuracy is high, shortens the closed loop corresponding time, improves control accuracy, it is to avoid material 14 to be drawn is pulled off, it is ensured that production efficiency.
The second, tension force controls to achieve tension force cross-sectional distribution balanced compensated of the material 14 treating traction with the mating reaction of correction control, eliminate material purse up, the defect such as stricture of vagina trace, improve product quality.
3rd, the design of integral structure significantly reduces installing space, reduces material path in hot state, decreases material and be contaminated probability, improves production efficiency and product quality.
4th, using vacuum carry-over pinch rolls 2 to draw, material is adsorbed when through vacuum carry-over pinch rolls 2, by material 14 to be drawn in baking oven due to distinguished and admirable and that cause fluctuation eliminates, allow material in baking oven be heated evenly and stable, product quality is higher.
5th, correction is sensitiveer, and the displacement of correction is less, material is more steady by running during baking oven, and the speed of production line thus can improve.
Although the foregoing describing detailed description of the invention of the present utility model, it will be appreciated by those of skill in the art that these are merely illustrative of, protection domain of the present utility model is defined by the appended claims.These embodiments, on the premise of without departing substantially from principle of the present utility model and essence, can be made various changes or modifications, but these changes and amendment each fall within protection domain of the present utility model by those skilled in the art.
Claims (10)
1. a vacuum traction apparatus, it is characterized in that, including vacuum carry-over pinch rolls, drive motor and shaft coupling, described driving motor is connected by described shaft coupling with described vacuum carry-over pinch rolls, described driving motor is for driving described vacuum carry-over pinch rolls by described shaft coupling, described vacuum carry-over pinch rolls are provided with vac sorb district, described vacuum carry-over pinch rolls for adsorbing material to be drawn and material to be drawn described in making is coated with described vac sorb district, described vacuum carry-over pinch rolls drive described in synchronous material to be drawn rotate.
2. vacuum traction apparatus as claimed in claim 1, it is characterized in that, described vacuum traction apparatus also includes controller, tension pick-up and tension-sensing roller, described tension-sensing roller is for being delivered to described vacuum carry-over pinch rolls by described material to be drawn, described tension pick-up is for gathering the tension value through material to be drawn described in described tension-sensing roller, and described controller is used for receiving described tension value and sending rotary speed regulating signal according to described tension value to described driving motor.
3. vacuum traction apparatus as claimed in claim 2, it is characterised in that described vacuum traction apparatus also includes decelerator, described driving motor regulates the rotating speed of described vacuum carry-over pinch rolls after receiving described rotary speed regulating signal by described decelerator.
4. vacuum traction apparatus as claimed in claim 2, it is characterised in that described tension-sensing roller includes that the aluminum barrel on central fixed shaft, bearing and surface, described tension pick-up are connected with described central fixed shaft.
5. vacuum traction apparatus as claimed in claim 4, it is characterised in that the cornerite between material to be drawn described in described tension-sensing roller and described tension-sensing roller is 5 ° to 30 °.
6. vacuum traction apparatus as claimed in claim 5, it is characterised in that through cornerite between material to be drawn and described vacuum carry-over pinch rolls described in described vacuum carry-over pinch rolls less than 90 °.
7. the vacuum traction apparatus as according to any one of claim 2 to 6, it is characterised in that described vacuum traction apparatus also includes that correcting error guidance mechanism, described correcting error guidance mechanism include that added, base, position-detection sensor, servo push-rod and symmetric double slide rail are secondary；Described vacuum carry-over pinch rolls, described tension-sensing roller and described driving motor be fixed on described added on；Described added and described base is slidably connected by described symmetric double slide rail pair；Described position-detection sensor is for gathering the positional value of described vacuum carry-over pinch rolls, described controller is additionally operable to receive institute's location value and send position adjustments signal according to institute's location value to described servo push-rod, and described servo push-rod drives described added through the secondary slip on described base of described symmetric double slide rail according to described position adjustments signal.
8. vacuum traction apparatus as claimed in claim 7, it is characterised in that described symmetric double slide rail pair includes the slide rail being positioned on described base and is positioned at the slide block of slide rail, described added is slidably connected with described base by described slide block.
9. vacuum traction apparatus as claimed in claim 8, it is characterised in that the angle scalable of the transverse axis of described slide rail and described slide rail place plane.
10. vacuum traction apparatus as claimed in claim 9, it is characterised in that described angle is 5 ° to 20 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521047043.1U CN205419220U (en) | 2015-12-15 | 2015-12-15 | Vacuum traction device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521047043.1U CN205419220U (en) | 2015-12-15 | 2015-12-15 | Vacuum traction device |
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| CN205419220U true CN205419220U (en) | 2016-08-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068389A (en) * | 2017-06-17 | 2017-08-18 | 丹凤县荣毅电子有限公司 | It is a kind of for the Winder of inductance and around line compensation method |
| CN107628472A (en) * | 2017-10-20 | 2018-01-26 | 金寨高贝斯无纺布制品有限公司 | Non-woven fabrics rubberizing equipment |
| CN108385264A (en) * | 2018-04-25 | 2018-08-10 | 浙江恒强科技股份有限公司 | Straight-bar machines roller draws force automatic regulating device |
| CN116902655A (en) * | 2023-09-13 | 2023-10-20 | 大阳(苏州)智能装备科技有限公司 | Vacuum deviation correcting mechanism for coating machine |
| CN117416079A (en) * | 2023-12-18 | 2024-01-19 | 南京玻璃纤维研究设计院有限公司 | Preparation method and system of waterproof composite film |
-
2015
- 2015-12-15 CN CN201521047043.1U patent/CN205419220U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068389A (en) * | 2017-06-17 | 2017-08-18 | 丹凤县荣毅电子有限公司 | It is a kind of for the Winder of inductance and around line compensation method |
| CN107068389B (en) * | 2017-06-17 | 2018-11-06 | 丹凤县荣毅电子有限公司 | It is a kind of for the bobbin winder device of inductance and around line compensation method |
| CN107628472A (en) * | 2017-10-20 | 2018-01-26 | 金寨高贝斯无纺布制品有限公司 | Non-woven fabrics rubberizing equipment |
| CN107628472B (en) * | 2017-10-20 | 2023-11-28 | 金寨高贝斯无纺布制品有限公司 | Non-woven fabrics rubberizing equipment |
| CN108385264A (en) * | 2018-04-25 | 2018-08-10 | 浙江恒强科技股份有限公司 | Straight-bar machines roller draws force automatic regulating device |
| CN116902655A (en) * | 2023-09-13 | 2023-10-20 | 大阳(苏州)智能装备科技有限公司 | Vacuum deviation correcting mechanism for coating machine |
| CN117416079A (en) * | 2023-12-18 | 2024-01-19 | 南京玻璃纤维研究设计院有限公司 | Preparation method and system of waterproof composite film |
| CN117416079B (en) * | 2023-12-18 | 2024-04-16 | 南京玻璃纤维研究设计院有限公司 | Preparation method and system of waterproof composite film |
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