CN219095974U - Double-layer co-extrusion film preparation equipment and swelling adhesive tape prepared from double-layer co-extrusion film preparation equipment - Google Patents
Double-layer co-extrusion film preparation equipment and swelling adhesive tape prepared from double-layer co-extrusion film preparation equipment Download PDFInfo
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- CN219095974U CN219095974U CN202223123246.7U CN202223123246U CN219095974U CN 219095974 U CN219095974 U CN 219095974U CN 202223123246 U CN202223123246 U CN 202223123246U CN 219095974 U CN219095974 U CN 219095974U
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- 238000001125 extrusion Methods 0.000 title claims abstract description 95
- 230000008961 swelling Effects 0.000 title claims abstract description 90
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000002390 adhesive tape Substances 0.000 title abstract description 41
- 239000002994 raw material Substances 0.000 claims abstract description 212
- 238000004804 winding Methods 0.000 claims description 27
- 238000005266 casting Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 76
- 239000012790 adhesive layer Substances 0.000 abstract description 53
- 230000001788 irregular Effects 0.000 abstract description 6
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000011229 interlayer Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 239000004798 oriented polystyrene Substances 0.000 description 4
- -1 acrylic ester Chemical class 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002355 dual-layer Substances 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Adhesive Tapes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses double-layer co-extrusion film preparation equipment and a swelling adhesive tape prepared by the same. The first raw material extrusion device is internally provided with a pulse control device which can be used for controlling the first raw material output quantity of the first raw material conveying pipeline in unit time so as to enable the first raw material output quantity to be periodically or aperiodically changed, and finally the thickness of the adhesive layer of the prepared swelling adhesive tape to be periodically or aperiodically changed (namely to be in a regular or irregular high-low fluctuation form) within a preset range; correspondingly, the raw materials of the swelling layer output by the second raw material extrusion device are sustainable, so that the swelling layer can be automatically filled in the area with smaller thickness of the adhesive layer or without the adhesive layer, the adhesive layer and the swelling layer are tightly contacted without generating gaps, and finally the swelling adhesive tape with variable adhesive layer thickness is prepared.
Description
Technical Field
The utility model relates to the technical field of co-extrusion film preparation equipment, in particular to double-layer co-extrusion film preparation equipment and a swelling adhesive tape prepared from the double-layer co-extrusion film preparation equipment.
Background
In order to prevent failure of the cylindrical lithium battery caused by movement of the bare cell relative to the case during use, it is generally necessary to provide a filler tape in a gap between the bare cell and the case of the cylindrical battery, and the filler tape commonly used at present is a swelling tape.
In the prior art, a great deal of technical schemes about preparation equipment and preparation procedures of swelling adhesive tapes are disclosed, for example, chinese patent application publication No. CN111995957A discloses a high expansion rate oriented polystyrene swelling adhesive tape and a preparation method thereof, the adhesive tape is formed by compounding a single-sided release oriented polystyrene film substrate and an acrylic ester adhesive layer, the preparation method is mainly to attach a corona surface of an OPS film coated with a release layer to the acrylic ester adhesive layer coated on the release layer of organic silicon, and then remove the release layer of organic silicon to obtain the two-layer structure of the acrylic ester adhesive layer/the OPS release film. For another example, chinese patent application publication No. CN114854325a discloses a multi-layer thickness swelling tape for lithium ion battery and a preparation method thereof, the tape is composed of a swellable substrate layer, a first pressure-sensitive adhesive layer, a swelling material T substrate layer and a second pressure-sensitive adhesive layer, the preparation method is that one side of the swelling material T substrate is corona treated and then coated with pressure-sensitive adhesive to form the first pressure-sensitive adhesive layer, the swellable substrate is corona treated and compounded with the first pressure-sensitive adhesive layer, the release film is coated with pressure-sensitive adhesive to form the second pressure-sensitive adhesive layer, the other side of the swelling material T substrate is corona treated and then compounded with the second pressure-sensitive adhesive layer, and the multi-layer swelling tape is obtained.
The swelling adhesive tape prepared by the preparation method can realize swelling in the thickness direction, so that the gap between the battery core and the shell is filled in an omnibearing manner, and the swelling adhesive tape has the functions of shock resistance, drop resistance and the like, but also has the following technical defects: the swelling adhesive tape prepared by the coating and compounding process mode has the advantages that all adhesive layers are uniformly arranged (the thickness is unchanged), namely, the swelling adhesive tape with the changeable adhesive layer thickness cannot be obtained or is difficult to obtain by a direct coating and compounding mode; and the preparation equipment of the production process mode is numerous and the process is complex, so that the preparation cost of the adhesive tape is high.
Therefore, there is a need in the art to invent a swelling tape manufacturing apparatus that can be used to achieve a variable thickness of the manufacturing adhesive layer.
Disclosure of Invention
In order to solve the technical problems that the traditional swelling adhesive tape preparation equipment cannot or is difficult to prepare the swelling adhesive tape with the changeable adhesive layer thickness in the prior art, the utility model provides double-layer co-extrusion film preparation equipment and the swelling adhesive tape prepared by the double-layer co-extrusion film preparation equipment.
The utility model adopts the technical proposal for solving the problems that:
a dual-layer co-extruded film production apparatus comprising a first raw material extrusion device and a second raw material extrusion device, the first raw material extrusion device comprising:
the device comprises a first raw material conveying pipeline, a second raw material conveying pipeline and a heating device, wherein a rotatable first spiral conveying rod is arranged in the first raw material conveying pipeline;
the first raw material hopper is communicated with the first raw material conveying pipeline and is used for feeding a first raw material;
a first driving mechanism for driving the first screw conveyor rod to rotate so as to send out a first raw material from the first raw material conveyor pipe;
and the pulse control device is used for controlling the first raw material output quantity of the first raw material conveying pipeline in unit time so as to enable the first raw material output quantity to be changed periodically or aperiodically.
In a first embodiment of the present utility model, a technical solution is provided regarding a specific structural arrangement of the pulse control apparatus.
The pulse control device comprises a feeding switch, wherein the feeding switch is arranged in the first raw material hopper, and the feeding switch is used for controlling the opening degree of the first raw material hopper.
Further, the feeding switch comprises a baffle plate, the baffle plate is rotatably arranged in the first raw material hopper, and the size of a gap between the edge of the baffle plate and the inner side wall of the first raw material hopper can be adjusted by rotating the baffle plate; wherein the gap is for a first feedstock from the first feedstock hopper into the first feedstock delivery conduit.
Further, the feeding switch further comprises a rotating shaft, the baffle is fixedly installed on the rotating shaft, and the rotating shaft is rotatably installed on the first raw material hopper.
In a second embodiment of the present utility model, a technical solution is provided regarding specific structural arrangements of the second raw material extrusion device, the co-extrusion runner, the co-extrusion die, the casting device, the thickness measuring device, the traction device and the winding device.
The second raw material extruding device comprises a second raw material conveying pipeline, a second raw material hopper and a second driving mechanism, a rotatable second spiral conveying rod is arranged in the second raw material conveying pipeline, the second raw material hopper is communicated with the second raw material conveying pipeline, and the second driving mechanism is used for driving the second spiral conveying rod to rotate.
Further, the double-layer co-extrusion film preparation equipment further comprises a co-extrusion runner and a co-extrusion die, wherein an inlet of the co-extrusion runner is connected with an outlet of the first raw material conveying pipeline and an outlet of the second raw material conveying pipeline respectively, and an outlet of the co-extrusion runner is connected with an inlet of the co-extrusion die.
Further, the double-layer co-extrusion film preparation equipment further comprises a casting device, wherein the casting device comprises a plurality of cooling rollers, and a gap for passing through a film extruded from an outlet of the co-extrusion die is formed between two adjacent cooling rollers.
Further, the double-layer co-extrusion film preparation equipment further comprises a traction device and a winding device, wherein the winding device comprises a winding roller, and the traction device is used for drawing the film on the casting device onto the winding roller so as to finish the winding operation of the film.
Further, the double-layer co-extrusion film preparation equipment further comprises a thickness measuring device, wherein the thickness measuring device is arranged on the casting device, the traction device or the winding device and is used for detecting the thickness of a film; and the first raw material extrusion device comprises a control module which is in communication connection with the thickness measuring device and is used for receiving thickness information of the membranous material and controlling the first raw material output quantity in unit time according to the thickness information.
Based on the same design thought, the utility model also provides an embodiment of the swelling adhesive tape, which is prepared by the double-layer co-extrusion film preparation equipment.
The swelling adhesive tape comprises an adhesive layer and a swelling layer which are sequentially arranged, wherein the thickness of the adhesive layer is periodically or aperiodically changed along the length direction or the width direction of the adhesive layer.
In summary, compared with the prior art, the double-layer co-extrusion film preparation equipment and the swelling adhesive tape prepared by the double-layer co-extrusion film preparation equipment have at least the following technical effects:
1) The double-layer co-extrusion film preparation equipment provided by the utility model comprises a first raw material extrusion device and a second raw material extrusion device, wherein the first raw material extrusion device is used for outputting a raw material of a glue layer (namely a first raw material) of a swelling adhesive tape, and the second raw material extrusion device is used for outputting a raw material of a swelling layer of the swelling adhesive tape; the first raw material extrusion device is internally provided with a pulse control device which can be used for controlling the first raw material output quantity of the first raw material conveying pipeline in unit time so as to enable the first raw material output quantity to be periodically or aperiodically changed, and finally the thickness of the adhesive layer of the prepared swelling adhesive tape to be periodically or aperiodically changed (namely to be in a regular or irregular high-low fluctuation form) within a preset range; correspondingly, the raw materials of the swelling layer output by the second raw material extrusion device are sustainable, so that the swelling layer can be automatically filled in the area with smaller thickness of the adhesive layer or without the adhesive layer, the adhesive layer and the swelling layer are tightly contacted without generating gaps, and finally the swelling adhesive tape with variable adhesive layer thickness is prepared.
2) In the swelling adhesive tape manufactured by the double-layer co-extrusion film manufacturing equipment provided by the utility model, the adhesive layer is periodically or aperiodically changed (namely, is in a regular or irregular high-low fluctuation form), so that more swelling space can be brought to the swelling adhesive tape when the swelling adhesive tape is put into a cylindrical battery for use, and the adhesive layer is partially dissolved in electrolyte of the battery at a position where the adhesive layer is thinner (smaller in thickness), so that the swelling layer is discontinuously abutted against the bare cell, a gap between a shell and the battery cell can be fully filled, and the anti-falling performance of the battery is improved.
Drawings
FIG. 1 is a schematic block diagram of a double-layer co-extruded film making apparatus of the present utility model;
FIG. 2 is a schematic cross-sectional view of a first raw material extrusion apparatus of the present utility model;
FIG. 3 is a schematic diagram of a loading switch according to the present utility model;
FIG. 4 is a schematic structural view of a double-layer extrusion die and a casting apparatus of the present utility model;
FIG. 5 is a schematic view showing a first interlayer structure of the swelling tape of the present utility model;
FIG. 6 is a schematic view of a second interlayer structure of the swelling tape of the present utility model;
FIG. 7 is a schematic view of a third interlayer structure of the swelling tape of the present utility model;
wherein the reference numerals have the following meanings:
1. a first raw material extrusion device; 11. a first raw material conveying pipeline; 12. a first screw conveyor rod; 13. a heating device; 14. a first raw material hopper; 15. a feeding switch; 151. a baffle; 152. a rotating shaft; 16. a first driving mechanism; 17. a control module; 2. a second raw material extrusion device; 3. a double-layer co-extrusion runner; 4. a double-layer co-extrusion die; 5. a casting device; 51. a first cooling roller; 52. a second cooling roller; 6. a thickness measuring device; 7. a traction device; 8. a winding device; a. a glue layer; b. and (5) a swelling layer.
Detailed Description
For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.
In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Referring to fig. 1, according to an embodiment of the present utility model, a double-layered co-extrusion film manufacturing apparatus includes a first raw material extrusion device 1 for outputting a raw material for a gum layer (i.e., a first raw material) of a swelling tape, and a second raw material extrusion device 2 for outputting a raw material for a swelling layer of the swelling tape.
Referring to fig. 2, the first raw material extrusion device 1 includes a first raw material conveying pipe 11, a rotatable first screw conveying rod 12 is provided in the first raw material conveying pipe 11, and a heating device 13 is provided on the first raw material conveying pipe 11. The first screw conveying rod 12 is used for horizontally conveying out the first raw materials (namely, the raw materials of the adhesive layer of the swelling adhesive tape) in the first raw material conveying pipeline 11 after grinding and mixing in the rotating process; the heating device 13 is used for heating the first raw material in the first raw material conveying pipeline 11 to melt and plasticize the first raw material into a fluid shape. More specifically, the heating device 13 may be provided at the outer pipe wall of the first raw material conveying pipe 11, or may be provided inside the first raw material conveying pipe 11; the electric heating device can be selected, components such as PTC electric heating and the like can be adopted, and the specific installation position and the structural form are not particularly limited in the utility model.
Referring to fig. 2, the first raw material extrusion apparatus 1 further includes a first raw material hopper 14, and the first raw material hopper 14 communicates with the first raw material conveying pipe 11. The first raw material hopper 14 is used for feeding the first raw material, the first raw material enters the first raw material conveying pipeline 11 after passing through the first raw material hopper 14, and finally is sent out from the first raw material extrusion device 1 through the conveying function of the first spiral conveying rod 12.
Referring to fig. 2, the first raw material extrusion device 1 further includes a first driving mechanism 16, and the first driving mechanism 16 is configured to drive the first screw 12 to rotate so as to send the first raw material out of the first raw material conveying pipe 11. The first driving mechanism 16 may adopt a structure of a servo motor, and is directly and fixedly connected with the first screw conveying rod 12 through an output end of the servo motor, so as to drive the first screw conveying rod 12 to rotate; the structure of a servo motor and a speed reducer can also be adopted, the output end of the servo motor is connected with the input end of the speed reducer, and the output end of the speed reducer is fixedly connected with the first screw conveying rod 12 so as to drive the first screw conveying rod 12 to rotate; the structure of the driving mechanism such as a servo motor, a gear, a turbine, a worm and the like can be adopted, and finally, the first screw conveying rod 12 can be driven to rotate, so that the specific structure of the driving mechanism 16 is not particularly limited in the utility model.
In the technical solution of this embodiment, the first raw material extruding device 1 further includes a pulse control device, which is configured to control the first raw material output amount of the first raw material conveying pipeline 11 in a unit time, so that the first raw material output amount changes periodically or non-periodically, and finally the thickness of the adhesive layer a of the prepared swelling adhesive tape changes periodically or non-periodically (i.e. in a regular or irregular high-low fluctuation form) within a preset range; correspondingly, the swelling layer raw materials output by the second raw material extrusion device are sustainable, so that the swelling layer b can be automatically filled in the area with smaller thickness of the adhesive layer a, the adhesive layer a and the swelling layer b are tightly contacted without gaps, and finally the swelling adhesive tape with the changeable thickness of the adhesive layer a is prepared, and the structure design is simple and reasonable and the procedure is simple and convenient.
Example 1
In a first embodiment of the present utility model, a technical solution is provided regarding a specific structural arrangement of the pulse control apparatus.
Referring to fig. 2, in the technical solution of this embodiment, the pulse control device includes a feed switch 15, where the feed switch 15 is disposed inside the first raw material hopper 14, and the feed switch 15 is used to control the opening of the first raw material hopper 14. Specifically, since the first raw material hopper 14 is used for feeding the first raw material and allowing the first raw material to enter the first raw material conveying pipeline 11 and finally output from the first raw material conveying pipeline 11, by controlling the opening degree of the first raw material hopper 14, the first raw material feeding amount entering the first raw material conveying pipeline 11 from the first raw material hopper 14 in unit time can be controlled, and further the first raw material output amount of the first raw material conveying pipeline 11 in unit time can be controlled, so that the first raw material output amount is periodically changed or non-periodically changed.
Referring to fig. 2 and 3, in a preferred embodiment of the present embodiment, the feed switch 15 includes a shutter 152, the shutter 152 is rotatably provided inside the first raw material hopper 14, and the size of a gap between an edge of the shutter 152 and an inner sidewall of the first raw material hopper 14 can be adjusted by rotating the shutter 152. Wherein the gap is for the first raw material to enter the interior of the first raw material conveying pipe 11 from the first raw material hopper 14. Specifically, the baffle 152 may preferably be configured in a flat plate-like structure, and the specific configuration and principle of the baffle 152 are as follows:
a. when the baffle 152 is horizontally extended, the edge of the baffle 152 and the inner side wall of the first raw material hopper 14 are tightly attached, no gap exists between the two, and the first raw material cannot enter the first raw material conveying pipeline 11 from the first raw material hopper 14, that is, the first raw material output quantity of the first raw material conveying pipeline 11 in unit time is controlled to be zero, and the thickness of the adhesive layer a of the swelling adhesive tape is zero;
b. when the baffle plate 152 rotates to an inclined state, a gap with the opening size and the inclination angle of the baffle plate 152 is formed between the edge of the baffle plate 152 and the inner side wall of the first raw material hopper 14, and the first raw material can enter the first raw material conveying pipeline 11 from the first raw material hopper 14, namely, the first raw material output amount of the first raw material conveying pipeline 11 in unit time can be controlled by controlling the rotation angle of the baffle plate 152, so that the thickness of the adhesive layer a of the swelling adhesive tape is periodically or aperiodically changed;
c. when the barrier 152 is rotated to the vertically extended state, the gap between the barrier 152 and the inner side wall of the first raw material hopper 14 is maximized, that is, the opening degree of the first raw material hopper 14 is maximized, and the first raw material amount entering the first raw material conveying pipe 11 from the first raw material hopper 14 per unit time is maximized, at which time the thickness of the adhesive layer a of the swelling tape is maximized.
Referring to fig. 2 and 3, in another preferred embodiment of the present embodiment, the feed switch further includes a rotation shaft 151, the shutter is fixedly installed on the rotation shaft 151, and the rotation shaft 151 is rotatably installed on the first raw material hopper 14.
Example 2
In a second embodiment of the present utility model, a technical solution is provided regarding specific structural arrangements of the second raw material extrusion device 2, the co-extrusion runner 3, the co-extrusion die 4, the casting device 5, the thickness measuring device 6, the traction device 7 and the winding device 8.
In the technical scheme of this embodiment, the second raw material extrusion device 2 includes a second raw material conveying pipe, a second raw material hopper and a second driving mechanism, the inside of the second raw material conveying pipe is provided with a rotatable second screw conveying rod, the second raw material hopper is communicated with the second raw material conveying pipe, and the second driving mechanism is used for driving the second screw conveying rod to rotate. The second raw material extrusion device 2 and the first raw material extrusion device 1 in this embodiment are configured in substantially the same manner, and the same points are:
the second raw material conveying pipeline and the first raw material conveying pipeline 11 have the same structure, a second spiral conveying rod arranged in the second raw material conveying pipeline is used for conveying the raw material of the swelling layer of the swelling adhesive tape out through rotation, and the second raw material conveying pipeline is also provided with a heating device 13 for heating the raw material of the swelling layer; the second raw material hopper and the first raw material hopper 14 have the same structure, the second raw material hopper is used for feeding the raw material of the swelling layer, the raw material of the swelling layer enters a second raw material conveying pipeline after passing through the second raw material hopper, and finally is sent out from the second raw material extrusion device under the conveying action of a second spiral conveying rod; the second driving mechanism and the first driving mechanism 16 have the same structure, and may adopt a structure form of a servo motor, a servo motor+a speed reducer or a servo motor+a gear, etc. for driving the second screw conveyor rod to rotate.
The second raw material extrusion device 2 differs from the first raw material extrusion device 1 in that:
the second raw material extrusion device 2 is not provided with a pulse control device, so that the raw material of the swelling layer output by the second raw material extrusion device is continuous, the swelling layer b can be automatically filled in the area with smaller thickness of the adhesive layer a, the adhesive layer a and the swelling layer b are tightly contacted without gaps, and finally the swelling adhesive tape with variable thickness of the adhesive layer a is prepared, and the structure design is simple and reasonable and the procedure is simple and convenient.
Referring to fig. 1, in a preferred embodiment of this embodiment, the dual-layer co-extrusion film manufacturing apparatus further includes a co-extrusion runner 3 and a co-extrusion die 4, wherein an inlet of the co-extrusion runner 3 is connected to outlets of the first raw material delivery pipe 11 and the second raw material delivery pipe, respectively, and an outlet of the co-extrusion runner 3 is connected to an inlet of the co-extrusion die 4. Wherein the co-extrusion runner 3 is provided with two inlets which are respectively connected with the outlets of the first raw material conveying pipeline 11 and the second raw material conveying pipeline directly or indirectly through pipelines; the co-extrusion runner 3 is provided with two outlets for direct connection or connection with two inlets arranged by a pipeline and the co-extrusion die 4; through the above structural design mode, the first raw materials (the raw materials of the adhesive layer) and the raw materials of the swelling layer in the first raw material conveying pipeline 11 and the second raw material conveying pipeline can flow into the co-extrusion die 4 through the co-extrusion runner 3, and then the two raw materials are co-extruded through the co-extrusion die 4 to form a double-layer co-extrusion film.
In another preferred aspect of this embodiment, the double-layer co-extrusion film production apparatus further includes a casting device 5, the casting device 5 including a plurality of cooling rolls, a space being formed between two adjacent cooling rolls for passing the film extruded from the outlet of the co-extrusion die 4. Referring to fig. 4, taking a first cooling roller 51 and a second cooling roller 52 of the cooling rollers as an example, a double-layer coextruded film formed by the coextrusion die 4 enters a gap between the first cooling roller 51 and the second cooling roller 52, and is stretched and shaped into a casting film under the extrusion action between the two cooling rollers and the cooling action of the cooling rollers.
Referring to fig. 1, in another preferred embodiment of the present embodiment, the apparatus for producing a double-layer co-extruded film further includes a drawing device 7 and a winding device 8, the winding device 8 includes a winding roller, and the drawing device 7 is used for drawing the film on the casting device 5 onto the winding roller to complete the winding operation of the film. Specifically, the casting film after cooling and shaping is guided onto the winding roller of the winding device 8 under the traction action of the traction device 7 (preferably a plurality of rotatable traction rollers) on the casting device 5, and is wound on the winding roller under the continuous rotation of the winding roller, so that the winding operation is finally completed.
Referring to fig. 1, in another preferred aspect of this embodiment, the apparatus for preparing a double-layered co-extruded film further includes a thickness measuring device 6, where the thickness measuring device 6 is disposed on the casting device 5, the drawing device 7 or the winding device 8, for detecting the thickness of the film. The first raw material extrusion device 1 further includes a control module 17, and the control module 17 is in communication connection with the thickness measuring device 6, and is configured to receive thickness information of the film and control the first raw material output amount of the first raw material extrusion device 1 per unit time according to the thickness information. Specifically, the thickness measuring device 6 may be disposed on the casting device 5, the traction device 7 or the winding device 8, so that the thickness of the adhesive layer of the shaped co-extruded film can be detected at each device, and the thickness parameter is sent to the control module 17, and when the thickness abnormality of the adhesive layer is detected, the control module 17 can control the pulse control device to adjust the first raw material output amount of the first raw material conveying pipeline 11 in unit time. For example, when the thickness of the glue layer is smaller than the preset thickness parameter range, the control module 17 controls the feeding switch 15 to increase the opening of the first raw material hopper 14, so that the first raw material feeding amount from the first raw material hopper 14 to the first raw material conveying pipeline 11 in unit time is increased, and the first raw material output amount of the first raw material conveying pipeline 11 in unit time is increased. And in the same way, when the thickness of the adhesive layer is larger than the range of the preset thickness parameter, the control module 17 controls the feeding switch 15 to execute the opposite operation, and the structural design is simple and reasonable.
Example 3
Based on the same design thought, the utility model also provides an embodiment of the swelling adhesive tape, which is prepared by the double-layer co-extrusion film preparation equipment.
Referring to fig. 5-7, the swelling adhesive tape comprises a glue layer a and a swelling layer b which are sequentially arranged, wherein the thickness of the glue layer a periodically or aperiodically changes along the length direction or the width direction of the glue layer a, namely the glue layer a is in a regular or irregular high-low fluctuation form; correspondingly, the swelling layer b is filled in the area with smaller thickness of the adhesive layer a or without the adhesive layer a, so that the adhesive layer a and the swelling layer b are in close contact without generating gaps, and finally the swelling adhesive tape with the thickness of the adhesive layer a being variable is obtained. Referring specifically to fig. 5-7, fig. 5 shows an interlayer structure in which the thickness of the adhesive layer a of the swelling tape is continuously and periodically varied; FIG. 6 shows an interlayer structure morphology in which the thickness of the adhesive layer a of the swelling tape is continuously and non-periodically varied; fig. 7 shows the interlayer structure morphology in which the thickness of the adhesive layer a of the swelling tape is discontinuously changed (periodically changed or aperiodically changed).
In the technical scheme of the embodiment, when the swelling adhesive tape prepared by the utility model is put into a cylindrical battery for use, more swelling space can be brought to the swelling adhesive tape, and the adhesive layer a is partially dissolved in electrolyte of the battery at a position where the adhesive layer a is arranged to be thinner (the thickness is smaller), so that the swelling layer b is discontinuously abutted against the bare cell, a gap between the shell and the cell can be fully filled, and the anti-falling performance of the cylindrical battery is further improved.
In summary, the first raw material extrusion device 1 provided by the present utility model is provided with a pulse control device, which can be used to control the first raw material output amount (i.e. the output amount of the raw material of the adhesive layer) of the first raw material conveying pipeline 11 in a unit time, so that the first raw material output amount changes periodically or non-periodically, and finally the thickness of the adhesive layer a of the prepared swelling adhesive tape changes periodically or non-periodically (i.e. in a regular or irregular shape) within a preset range; correspondingly, the swelling layer raw materials output by the second raw material extrusion device 2 are sustainable, so that the swelling layer b can be automatically filled in the area with smaller thickness of the adhesive layer a or without the adhesive layer a, the adhesive layer a and the swelling layer b are tightly contacted without gaps, and finally the swelling adhesive tape with the changeable thickness of the adhesive layer a is prepared, and the structure design is simple and reasonable and the procedure is simple and convenient.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (10)
1. A double-layer co-extrusion film preparation device, comprising a first raw material extrusion device and a second raw material extrusion device, wherein the first raw material extrusion device comprises:
the device comprises a first raw material conveying pipeline, a second raw material conveying pipeline and a heating device, wherein a rotatable first spiral conveying rod is arranged in the first raw material conveying pipeline;
the first raw material hopper is communicated with the first raw material conveying pipeline and is used for feeding a first raw material;
a first driving mechanism for driving the first screw conveyor rod to rotate so as to send out a first raw material from the first raw material conveyor pipe;
and the pulse control device is used for controlling the first raw material output quantity of the first raw material conveying pipeline in unit time so as to enable the first raw material output quantity to be changed periodically or aperiodically.
2. The apparatus for producing a double-layered co-extruded film according to claim 1, wherein the pulse control device comprises a feed switch provided in the interior of the first raw material hopper, the feed switch being for controlling the opening degree of the first raw material hopper.
3. The apparatus according to claim 2, wherein the feed switch includes a shutter rotatably provided inside the first raw material hopper, and a gap size between an edge of the shutter and an inner side wall of the first raw material hopper is adjustable by rotating the shutter; wherein the gap is for a first feedstock from the first feedstock hopper into the first feedstock delivery conduit.
4. The apparatus for producing a double-layered co-extruded film according to claim 3, wherein the feed switch further comprises a rotation shaft, the shutter is fixedly installed on the rotation shaft, and the rotation shaft is rotatably installed on the first raw material hopper.
5. The double-layer co-extrusion film production apparatus according to claim 1, wherein the second raw material extrusion device comprises a second raw material conveying pipe, a second raw material hopper and a second driving mechanism, a rotatable second screw conveying rod is arranged inside the second raw material conveying pipe, the second raw material hopper is communicated with the second raw material conveying pipe, and the second driving mechanism is used for driving the second screw conveying rod to rotate.
6. The apparatus according to claim 5, further comprising a coextrusion runner and a coextrusion die, wherein an inlet of the coextrusion runner is connected to outlets of the first raw material delivery pipe and the second raw material delivery pipe, respectively, and an outlet of the coextrusion runner is connected to an inlet of the coextrusion die.
7. The apparatus according to claim 6, further comprising a casting device including a plurality of cooling rollers, and a gap for passing a film extruded from an outlet of the coextrusion die is formed between two adjacent cooling rollers.
8. The apparatus for producing a double-layered co-extruded film according to claim 7, further comprising a drawing device and a winding device, wherein the winding device comprises a winding roller, and the drawing device is used for drawing the film on the casting device onto the winding roller to complete the winding operation of the film.
9. The double-layer co-extrusion film manufacturing apparatus according to claim 8, further comprising a thickness measuring device provided on the casting device, the drawing device or the winding device for detecting the thickness of the film; and the first raw material extrusion device comprises a control module which is in communication connection with the thickness measuring device and is used for receiving thickness information of the membranous material and controlling the first raw material output quantity in unit time according to the thickness information.
10. A swelling tape produced by the double-layer co-extrusion film production apparatus according to any one of claims 1 to 9, characterized in that the swelling tape comprises a glue layer and a swelling layer which are disposed in this order, the thickness of the glue layer varying periodically or aperiodically along the length direction or the width direction thereof.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223123246.7U CN219095974U (en) | 2022-11-23 | 2022-11-23 | Double-layer co-extrusion film preparation equipment and swelling adhesive tape prepared from double-layer co-extrusion film preparation equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223123246.7U CN219095974U (en) | 2022-11-23 | 2022-11-23 | Double-layer co-extrusion film preparation equipment and swelling adhesive tape prepared from double-layer co-extrusion film preparation equipment |
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| CN219095974U true CN219095974U (en) | 2023-05-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118342710A (en) * | 2024-04-22 | 2024-07-16 | 泰州市同创装饰材料有限公司 | An environmentally friendly PVC floor film processing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118342710A (en) * | 2024-04-22 | 2024-07-16 | 泰州市同创装饰材料有限公司 | An environmentally friendly PVC floor film processing device |
| CN118342710B (en) * | 2024-04-22 | 2024-12-31 | 泰州市同创装饰材料有限公司 | An environmentally friendly PVC floor film processing device |
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Effective date of registration: 20230908 Address after: 523290 No. 46, Shijie section, Beiwang Road, Shijie Town, Dongguan City, Guangdong Province Patentee after: Dongguan aozhongxin Material Technology Co.,Ltd. Patentee after: AOZHONG new material technology (Shaoguan) Co.,Ltd. Patentee after: Aohua New Materials Technology (Shaoguan) Co.,Ltd. Address before: 523290 No. 46, Shijie section, Beiwang Road, Shijie Town, Dongguan City, Guangdong Province Patentee before: Dongguan aozhongxin Material Technology Co.,Ltd. |