CN112354813A - Coating method of double-sided coating and double-coating preparation equipment - Google Patents
Coating method of double-sided coating and double-coating preparation equipment Download PDFInfo
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- CN112354813A CN112354813A CN202011190248.0A CN202011190248A CN112354813A CN 112354813 A CN112354813 A CN 112354813A CN 202011190248 A CN202011190248 A CN 202011190248A CN 112354813 A CN112354813 A CN 112354813A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
- B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
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Abstract
The invention discloses a coating method of a double-sided coating and double-coating preparation equipment, which comprises an unreeling mechanism, a heat treatment mechanism, a first coating mechanism, a first drying mechanism, a second coating mechanism, a second drying mechanism and a reeling mechanism, wherein the heat treatment mechanism comprises a heat treatment box, the first drying mechanism and the second drying mechanism respectively comprise a first drying box and a second drying box, an air outlet at the bottom end of the heat treatment box is connected with an air inlet of the first drying box through an air pipeline, and an air outlet on the first drying box is connected with an air inlet end of the second drying box through an air pipeline. According to the invention, an asymmetric double-sided coating product can be formed on two surfaces of the substrate, the asymmetric performance of the two coating layers of the prepared double-layer coating product keeps high consistency, and the prepared double-layer coating product has personalized customization capability according to the asymmetry and can be personalized and customized according to the requirements of people.
Description
Technical Field
The invention relates to the technical field of film coating, in particular to a coating method of a double-sided coating and double-coating preparation equipment.
Background
In order to improve the film surface characteristics of sheets, such as thin films, lithium battery separators and the like, most sheet manufacturers or modification substitute manufacturers modify the surfaces of the sheets in a coating manner, so that various coating processes and coating equipment are generated. At present, a single-side coating process and coating equipment and a double-side coating process and coating equipment are mainly adopted in the market, but at the beginning of design, equipment manufacturers and sheet manufacturers rarely consider the difference between double-layer coating diaphragm coatings manufactured by the double-side coating process and carry out process design and equipment design on the double-layer coating diaphragm coatings, so that the difference between the two coatings of a prepared coating product is uncontrollable, the product consistency is poor, and the personalized customization is difficult to carry out according to different requirements of customers on the two coatings.
Disclosure of Invention
The invention aims to provide a coating method of a double-sided coating and double-coated layer preparation equipment, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: a coating method of a double-sided coating and double-coated layer preparation equipment comprise an unreeling mechanism, a heat treatment mechanism, a first coating mechanism, a first drying mechanism, a second coating mechanism, a second drying mechanism and a reeling mechanism, wherein the heat treatment mechanism comprises a heat treatment box, the first drying mechanism and the second drying mechanism respectively comprise a first drying box and a second drying box, an air outlet at the bottom end of the heat treatment box is connected with an air inlet of the first drying box through an air conveying pipeline, and an air outlet on the first drying box is connected with an air inlet end of the second drying box through an air conveying pipeline.
In a preferred embodiment, the unwinding mechanism and the winding mechanism both comprise winding rollers, the winding rollers are driven by a driving motor to rotate and are arranged on a support frame, and a film cutting assembly is arranged on the support frame of the winding mechanism.
In a preferred embodiment, the inside of heat treatment case is provided with first guide roller set, heating roller set and second guide roller set, the substrate that stretches out on the unwinding mechanism is introduced into heat treatment case through first guide roller set, heating roller set includes a plurality of heating rollers that are the V style of calligraphy range, the inside of heating roller all is provided with the cavity, upper end one side of heat treatment case is provided with hot intake pipe, hot intake pipe and the inside cavity intercommunication of heating roller, every equal interval is even on the heating roller is provided with a plurality of bleeder vent.
In a preferred embodiment, first coating mechanism and second coating mechanism all include coating tension control module group, nip roll and coating machine, coating tension control module group is including the regulating roller, regulating roller fixed mounting is on the alignment jig, the bottom of alignment jig sets up in the backup pad, the inside both ends of backup pad all are provided with the sleeve, the inside regulating block that is provided with of sleeve, the lateral wall of backup pad is passed to the bottom of regulating block to fixed the setting on the regulating block, the fixed spring that is provided with in upper end of regulating block, nip roll sets up between coating tension control module group and coating machine, the coating machine in the first coating mechanism sets up the top at the substrate, the coating machine in the second coating mechanism sets up the below at the substrate.
In a preferred embodiment, the inside of first stoving case and second stoving case all is provided with stoving tension and adjusts module and stoving guide roller group in first drying mechanism and the second drying mechanism, stoving tension adjusts the module and is the same with the structure of coating tension control module group, stoving guide roller group is the arch and sets up inside first stoving case and second stoving case, the inside of first stoving case and second stoving case all is provided with temperature sensor, the outside of first stoving case and second stoving case all is provided with temperature compensator.
In a preferred embodiment, the gas transmission pipeline adopts a plurality of insulating tube combination to form, every insulating tube one end lateral wall aperture is greater than the aperture of other end lateral wall, the insulating tube is located the fixed sealing piston that is provided with of thinner one end, sealing piston's the outside is provided with rubber seal, sealing piston's intermediate position is seted up with the equal through-hole of the uncovered structure of the thinner end of insulating tube, sealing piston and insulating tube thick end inside lateral wall phase-match, the outside of insulating tube all is equipped with the heat preservation cotton, every all be provided with two sets of solid fixed rings on the insulating tube, it is two sets of gu all be provided with the fixed orifices of mutual matching on the fixed ring, be provided with the long-foot screw between the fixed orifices.
A coating method of a double-sided coating comprises the following steps:
a) the substrate is wound on a winding roller in an unwinding mechanism, then the substrate on the winding roller is drawn out to sequentially pass through a heat treatment mechanism, a first coating mechanism, a first drying mechanism, a second coating mechanism and a second drying mechanism, and then the substrate is wound on a winding mechanism;
b) the base material enters the heat treatment box through the first guide roller set, then penetrates through the heating roller set and the second guide roller set, hot air is blown into the heating roller of the heating roller set through the hot air inlet pipe, the hot air is blown out through the air holes in the heating roller to heat the base material, and the heating roller set is arranged in a V shape, so that the heating effect on the base material is better;
c) the heated base material enters a first coating mechanism, a coating tension control module in the first coating mechanism adjusts the tension of the base material, then the base material is stretched through a flattening roller, the upper surface of the base material is coated through a coating machine, the base material coated on the upper surface enters a first drying box, after the tension of the base material is adjusted through a drying tension adjusting module, a drying guide roller set drives the base material to move in a first drying box, the temperature of discharged gas in the heat treatment box is high, and the base material is conveyed through a gas pipeline to be cooled and then is guided into the first drying box to be primarily dried;
d) the base material after primary coating and drying enters a second coating mechanism, a coating tension control module in the second coating mechanism adjusts the tension of the base material, then the base material is stretched through a flattening roller, the lower surface of the base material is coated through a coating machine, the base material with the coated lower surface enters a second drying box, the second drying box performs secondary drying on the base material, and gas exhausted from the first drying box is introduced into the second drying box through a gas pipeline to dry the base material;
e) and winding the substrate after secondary drying on a winding roller in a winding mechanism, and cutting off the winding front end of the substrate by using a film cutting assembly in the winding mechanism to finish the double-sided coating of the substrate.
In a preferred embodiment, the drying temperature in the first drying oven is T1, the drying temperature in the second drying oven is T2, and 1 < T1/T2 < 2.4, and the 85 ℃ ≥ T2 ≥ 35 ℃, the density after drying of the upper surface of the base material is M1, the density after drying of the lower surface of the base material is M2, and M1>M2>0.1g/m2，1＜M1/M2≤20。
In a preferred embodiment, the substrate is one of a polyolefin separator, a polyolefin composite separator, a PET separator, and a single-sided or double-sided ceramic-coated separator of the above base film.
In a preferred embodiment, the coating machine is one or more of a micro-gravure coating machine, a spray coating machine and a mesh roll coating machine, and the coating is one of polyvinylidene fluoride, PMMA, alumina, boehmite and magnesium hydroxide.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can coat one side of the base material firstly when coating the double sides and dry the base material after coating by coating the double sides or coating the single side of the base material, then coating the other surface of the base material, and performing secondary drying after coating to form an asymmetric double-sided coating product on the two surfaces of the base material, wherein the density of the dried surface of the base material after coating is higher during double-sided coating, the larger the required drying capacity is, the higher the drying temperature needs to be set, the higher the density of the dried surface coating on the substrate is, the higher the drying temperature is, T1 is more than T2, M1 is more than M2, so that the surface densities of the two coatings have certain difference, the asymmetry performance of the two coatings of the prepared double-layer coating product keeps high consistency, the personalized customization capability according to the asymmetry is realized, and the personalized customization can be realized according to the requirements of people;
2. the heat treatment box, the first drying box and the second drying box are connected through the gas transmission pipeline, the outer side of the gas transmission pipeline is coated with heat preservation cotton, loss of heat of hot gas in the gas transmission pipeline can be reduced, hot gas exhausted from the heat treatment box is guided into the first drying box to dry a primary coated base material, and then the primary coated base material is guided into the second drying box to be used, resource waste can be reduced, the gas transmission pipeline is composed of a plurality of heat preservation pipes, the length of the gas transmission pipeline can be adjusted according to actual needs, the internal temperatures of the first drying box and the second drying box are guaranteed to be within a certain range, and if the internal temperatures of the first drying box and the second drying box are low, the internal temperatures of the first drying box and the second drying box can be heated through the temperature compensators.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the process flow structure of the present invention;
FIG. 2 is a schematic view of the structure of the production apparatus of the present invention;
FIG. 3 is a schematic cross-sectional view of the production apparatus of the present invention;
FIG. 4 is a schematic diagram of a coating tension control module according to the present invention;
FIG. 5 is a schematic diagram of the results of the gas transmission pipeline of the present invention;
FIG. 6 is a schematic side view of the sealing piston of the present invention;
in the figure: 1, an unwinding mechanism; 2, a heat treatment mechanism; 201 a first guide roller set; 202 heating the roller set; 2021 heating roller; 203 a second set of heating rollers; 204 hot air inlet pipe; 3 a first coating mechanism; 301 coating tension control module; 3011 adjusting the rolls; 3012 adjusting the frame; 3013 supporting the plate; 3014 a sleeve; 3015 adjusting the block; 3016 a spring; 302 flattening rolls; 303 coating machine; 4 a first drying mechanism; 401 drying tension adjusting module; 402 drying the guide roller; 403 temperature sensor; 404 a temperature compensator; 5 a second coating mechanism; 6 a second drying mechanism; 7, a winding mechanism; 8, a heat treatment box; 9 a first drying box; 10 a second drying box; 11 a gas pipeline; 12 a winding roller; 13 supporting frames; 14 a substrate; 15, a heat preservation pipe; 16 sealing the piston; 17 rubber seal rings; 18 a fixing ring; 19 long-leg screws; 20 through holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a double-side coating method and a double-coating preparation apparatus, including an unwinding mechanism 1, a heat treatment mechanism 2, a first coating mechanism 3, a first drying mechanism 4, a second coating mechanism 5, a second drying mechanism 6 and a winding mechanism 7, where the heat treatment mechanism 2 includes a heat treatment box 8, the first drying mechanism 4 and the second drying mechanism 6 respectively include a first drying box 9 and a second drying box 10, an air outlet at a bottom end of the heat treatment box 8 is connected to an air inlet of the first drying box 9 through an air transmission pipeline 11, and an air outlet on the first drying box 9 is connected to an air inlet of the second drying box 10 through an air transmission pipeline 11.
In a preferred embodiment, each of the unwinding mechanism 1 and the winding mechanism 7 comprises a winding roller 12, each winding roller 12 is driven by a driving motor to rotate on a support frame 13, and a film cutting assembly is arranged on the support frame 13 of the winding mechanism 7.
In a preferred embodiment, a first guide roller set 201, a heating roller set 202 and a second guide roller set 203 are arranged inside the heat treatment box 8, the substrate 14 extending from the unwinding mechanism 1 is introduced into the heat treatment box 8 through the first guide roller set 201, the heating roller set 202 comprises a plurality of heating rollers 2021 arranged in a V shape, cavities are arranged inside the heating rollers 2021, a hot air inlet pipe 204 is arranged on one side of the upper end of the heat treatment box 8, the hot air inlet pipe 204 is communicated with the cavities inside the heating rollers 2021, and a plurality of air holes are uniformly arranged on each heating roller 2021 at intervals.
In a preferred embodiment, the first coating mechanism 3 and the second coating mechanism 5 each include a coating tension control module 301, a nip roll 302 and a coater 303, the coating tension control module 301 comprises an adjusting roller 3011, the adjusting roller 3011 is fixedly arranged on an adjusting frame 3012, the bottom end of the adjusting frame 3012 is arranged on the supporting plate 3013, sleeves 3014 are arranged at both ends of the inside of the supporting plate 3013, an adjusting block 3015 is arranged in the sleeve 3014, the bottom end of the adjusting block 3012 passes through the side wall of the supporting plate 3013, and is fixedly arranged on the adjusting block 3015, the upper end of the adjusting block 3015 is fixedly provided with a spring 3016, the nip roll 302 is disposed between the coating tension control module 301 and the coater 303, the coater 303 in the first coating mechanism 3 is disposed above the substrate 14, and the coater 303 in the second coating mechanism 5 is disposed below the substrate 14.
In a preferred embodiment, a drying tension adjusting module 401 and a drying guide roller set 402 are arranged inside the first drying box 9 and the second drying box 10 in the first drying mechanism 4 and the second drying mechanism 6, the drying tension adjusting module 401 and the coating tension control module 301 have the same structure, the drying guide roller set 402 is arranged inside the first drying box 9 and the second drying box 10 in an arched shape, the first drying box 9 and the second drying box 10 are both provided with temperature sensors 403 inside, and the first drying box 9 and the second drying box 10 are both provided with temperature compensators 404 outside.
In a preferred embodiment, gas transmission pipeline 11 adopts the combination of a plurality of insulating tube 15 to form, every insulating tube 15 one end lateral wall aperture is greater than the aperture of other end lateral wall, insulating tube 15 is located the fixed sealing piston 16 that is provided with of thinner one end, sealing piston 16's the outside is provided with rubber seal 17, sealing piston 16's intermediate position is seted up with the equal through-hole 20 of the uncovered structure of the thinner end of insulating tube 15, sealing piston 16 and insulating tube 15 thick inside lateral wall phase-match of end, insulating tube 15's the outside all is equipped with the heat preservation cotton, every all be provided with two sets of solid fixed rings 18 on the insulating tube 15, two sets of all be provided with the fixed orifices of mutual matching on the solid fixed ring 18, be provided with long-foot screw 19 between the fixed orifices.
A coating method of a double-sided coating comprises the following steps:
a) the substrate 14 is wound on a winding roller 12 in the unwinding mechanism 1, then the substrate 14 on the winding roller 12 is drawn out to sequentially pass through a heat treatment mechanism 2, a first coating mechanism 3, a first drying mechanism 4, a second coating mechanism 5 and a second drying mechanism 6, and then is wound on a winding mechanism 7;
b) the base material 14 enters the heat treatment box 8 through the first guide roller group 201, then passes through the heating roller group 202 and the second guide roller group 203 and penetrates out, hot air is blown into the heating roller 2021 in the heating roller group 202 through the hot air inlet pipe 204, the hot air is blown out through the air holes in the heating roller 2021 to heat the base material 14, the heating roller group 202 is arranged in a V shape, the heating effect on the base material 14 is better, preferably, a plurality of bulges are uniformly arranged on each heating roller 2021 at intervals, the bulges can support the base material 14, the hot air in the heating roller 2021 is conveniently blown to the base material 14 through the air holes, the heat treatment effect on the base material 14 is better, preferably, rubber gaskets are arranged at the opening structures at the two ends of the heat treatment box 8, the middle position of each rubber gasket is provided with a hole position through which only the base material 14 can pass, and the heat loss in the, more heat can be transferred to first drying box 9;
c) the heated base material 14 enters the first coating mechanism 3, the coating tension control module 301 in the first coating mechanism 3 adjusts the tension of the base material 14, the base material 14 is then spread by the nip roll 302, the upper surface of the base material 14 is coated by the coater 303, the base material 14 with the coated upper surface is introduced into the first drying oven 9, after the tension of the base material 14 is adjusted by the drying tension adjusting module 401, the drying guide roller set 402 drives the base material 14 to move in the first drying box 9, the temperature of the gas discharged from the heat treatment box 8 is higher, after being transported and cooled through the gas pipeline 11, the base material 14 is guided into the first drying box 9 for primary drying, preferably, the first drying box 9 can select a horizontal double-layer drying box, the drying guide roller set 402 in the drying box is preferably arranged in an arch shape, so that the supporting effect on the base material 14 is better;
d) the substrate 14 after primary coating and drying enters a second coating mechanism 5, a coating tension control module 301 in the second coating mechanism 5 adjusts the tension of the substrate 14, then the substrate 14 is stretched through a flattening roller 302, the lower surface of the substrate 14 is coated by a coating machine 303, the substrate 14 with the coated lower surface enters a second drying box 10, the second drying box 10 performs secondary drying on the substrate 14, gas exhausted from a first drying box 9 is introduced into the second drying box 10 through a gas pipeline 11 to dry the substrate 14, the gas pipeline 11 is formed by combining a plurality of heat-insulating pipes 15, the length of the gas pipeline 11 can be adjusted according to the required temperature in the first drying box 9 and the second drying box 10, the thinner end of the heat-insulating pipe 15 is inserted into the thicker end of another heat-insulating pipe 15 during adjustment, and a sealing piston 16 seals the heat-insulating pipe 15 with the thicker end, the total length of the gas transmission pipeline 11 is determined according to the length of the inserted heat preservation pipes 15, so that hot gas can be cooled in the gas transmission pipeline 11, the temperature of the hot gas guided into the first drying box 9 and the second drying box 10 is determined according to the length of the gas transmission pipeline 11, and one end of each heat preservation pipe 15 is inserted into one end of the other heat preservation pipe 15, so that the heat preservation effect of the overlapped part of the two heat preservation pipes 15 is good, and resources can be effectively saved;
e) and winding the substrate 14 subjected to secondary drying on a winding roller 12 in the winding mechanism 7, and cutting the winding front end of the substrate 14 by using a film cutting assembly in the winding mechanism 7 to finish the double-sided coating of the substrate 14.
In a preferred embodiment, the firstThe drying temperature in the drying box 9 is T1, the drying temperature in the second drying box 10 is T2, T1/T2 is more than 1 and less than 2.4, T2 is more than or equal to 85 ℃ and more than or equal to 35 ℃, the density of the dried upper surface of the base material 14 after drying is M1, the density of the dried lower surface of the base material 14 after drying is M2, and M1>M2>0.1g/m2，1＜M1/M2≤20。
In a preferred embodiment, the substrate 14 is one of a polyolefin separator, a polyolefin composite separator, a PET separator, and a single-sided or double-sided ceramic-coated separator of the above base films.
In a preferred embodiment, the coater 303 is one or more of a micro gravure coater, a spray coater, and a mesh roll coater, and the coating is one of polyvinylidene fluoride, PMMA, alumina, boehmite, and magnesium hydroxide.
In one embodiment, the polyolefin membrane is subjected to double-sided asymmetric coating, polyvinylidene fluoride is coated on the upper surface of the polyolefin membrane, and the temperature of heat treatment required when PMMA is coated on the lower surface of the polyolefin membrane, the drying temperatures of the first drying box and the second drying box, the surface density of the upper surface coating after drying, and the surface density of the lower surface coating after drying are as follows:
multiple experiments show that the two-side coating of the polyolefin diaphragm produced in the embodiment shown in the table I can keep asymmetric high consistency in the use process, the upper surface of the polyolefin diaphragm has the advantages of wear resistance, ultraviolet resistance, high toughness and the like, and the lower surface of the polyolefin diaphragm has the advantages of aging resistance, high transparency and the like; in this embodiment, the heat treatment temperature is the same as the temperature in the first drying box 9, the temperature compensator 404 is used to heat the inside of the first drying box 9, so that the temperature in the first drying box 9 is maintained at 60 ℃, the temperature in the second drying box 10 is maintained at 55 ℃, hot air in the first drying box 9 is introduced into the second drying box 10, the drying temperature in the second drying box 10 can be met, energy consumption is not needed for heating, and resources can be effectively saved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A double-sided coating preparation equipment is characterized in that: including unwinding mechanism (1), heat treatment mechanism (2), first coating mechanism (3), first drying mechanism (4), second coating mechanism (5), second drying mechanism (6) and winding mechanism (7), heat treatment mechanism (2) is including heat treatment case (8), first drying mechanism (4) and second drying mechanism (6) are including first stoving case (9) and second stoving case (10) respectively, the gas outlet of heat treatment case (8) bottom is passed through gas transmission pipeline (11) and is connected with the air inlet of first stoving case (9), the gas outlet on first stoving case (9) is passed through gas transmission pipeline (11) and is connected with the inlet end of second stoving case (10).
2. A double-sided coating preparation apparatus according to claim 1, characterized in that: unwinding mechanism (1) and winding mechanism (7) all include winding roller (12), winding roller (12) all drive through driving motor and rotate the setting on support frame (13), be provided with on support frame (13) of winding mechanism (7) and cut the membrane module.
3. A double-sided coating preparation apparatus according to claim 2, characterized in that: the inside of heat treatment case (8) is provided with first guide roller set (201), heating roller set (202) and second guide roller set (203), substrate (14) that stretch out on unwinding mechanism (1) are introduced into heat treatment case (8) through first guide roller set (201), heating roller set (202) include that a plurality of is warming mill (2021) of V style of calligraphy range, the inside of warming mill (2021) all is provided with the cavity, upper end one side of heat treatment case (8) is provided with hot intake pipe (204), hot intake pipe (204) and the inside cavity intercommunication of warming mill (2021), every even a plurality of bleeder vent that is provided with in equal interval on warming mill (2021).
4. A double-sided coating preparation apparatus according to claim 1, characterized in that: first coating mechanism (3) and second coating mechanism (5) all include coating tension control module group (301), nip roll (302) and coating machine (303), coating tension control module group (301) is including adjusting roll (3011), adjusting roll (3011) fixed mounting is on adjusting bracket (3012), the bottom setting of adjusting bracket (3012) is on backup pad (3013), the inside both ends of backup pad (3013) all are provided with sleeve (3014), sleeve (3014) inside is provided with adjusting block (3015), the lateral wall of backup pad (3013) is passed to the bottom of adjusting block (3012) to fixed the setting on adjusting block (3015), the fixed spring (3016) that is provided with in upper end of adjusting block (3015), nip roll (302) set up between coating tension control module (301) and coating machine (303), coating machine (303) in first coating mechanism (3) sets up the top at substrate (14), the coating machine (303) of the second coating mechanism (5) is arranged below the base material (14).
5. The apparatus for preparing a double-sided coating according to claim 4, wherein: the inside of first stoving case (9) and second stoving case (10) all is provided with stoving tension and adjusts module (401) and stoving guide roller set (402) in first drying mechanism (4) and second drying mechanism (6), stoving tension adjusts module (401) and coating tension control module (301) structure is the same, stoving guide roller set (402) are the arch and set up inside first stoving case (9) and second stoving case (10), the inside of first stoving case (9) and second stoving case (10) all is provided with temperature sensor (403), the outside of first stoving case (9) and second stoving case (10) all is provided with temperature compensator (404).
6. A double-sided coating preparation apparatus according to claim 1, characterized in that: the gas transmission pipeline (11) is formed by combining a plurality of heat preservation pipes (15), the aperture of the outer side wall of one end of each heat preservation pipe (15) is larger than that of the outer side wall of the other end, a sealing piston (16) is fixedly arranged at the thinner end of the heat preservation pipe (15), a rubber sealing ring (17) is arranged on the outer side of the sealing piston (16), a through hole with the same structure as the opening structure of the thinner end of the heat preservation pipe (15) is arranged in the middle of the sealing piston (16), the sealing piston (16) is matched with the side wall inside the thicker end of the heat preservation pipe (15), the outside of insulating tube (15) all is equipped with the heat preservation cotton, every all be provided with two sets of solid fixed rings (18) on insulating tube (15), two sets of all be provided with the fixed orifices that matches each other on solid fixed ring (18), be provided with long foot screw (19) between the fixed orifices.
7. The coating method of a double-sided preparation apparatus according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
a) the method comprises the steps that a base material (14) is wound on a winding roller (12) in an unwinding mechanism (1), then the base material (14) on the winding roller (12) is drawn out to sequentially pass through a heat treatment mechanism (2), a first coating mechanism (3), a first drying mechanism (4), a second coating mechanism (5) and a second drying mechanism (6), and then the base material is wound on a winding mechanism (7);
b) the base material (14) enters the heat treatment box (8) through the first guide roller set (201), then penetrates through the heating roller set (202) and the second guide roller set (203), hot air is blown into a heating roller (2021) in the heating roller set (202) through a hot air inlet pipe (204), the hot air is blown out through an air hole in the heating roller (2021) to heat the base material (14), the heating roller set (202) is arranged in a V shape, and the heating effect on the base material (14) is better;
c) the heated base material (14) enters a first coating mechanism (3), a coating tension control module (301) in the first coating mechanism (3) adjusts the tension of the base material (14), then the base material (14) is stretched through a flattening roller (302), the upper surface of the base material (14) is coated through a coating machine (303), the base material (14) with the coated upper surface enters a first drying box (9), after the tension of the base material (14) is adjusted through a drying tension adjusting module (401), a drying guide roller set (402) drives the base material (14) to move inside the first drying box (9), the temperature of gas discharged from a heat treatment box (8) is high, and the gas is conveyed through a gas conveying pipeline (11) to be cooled and then is guided into the first drying box (9) to perform primary drying on the base material (14);
d) the base material (14) after primary coating and drying enters a second coating mechanism (5), a coating tension control module (301) in the second coating mechanism (5) adjusts the tension of the base material (14), then the base material (14) is stretched through a flattening roller (302), the lower surface of the base material (14) is coated through a coating machine (303), the base material (14) with the coated lower surface enters a second drying box (10), the second drying box (10) performs secondary drying on the base material (14), and gas exhausted from the first drying box (9) is introduced into the second drying box (10) through a gas pipeline (11) to dry the base material (14);
e) and winding the substrate (14) subjected to secondary drying on a winding roller (12) in a winding mechanism (7), and cutting the winding front end of the substrate (14) by using a film cutting assembly in the winding mechanism (7) to finish the double-sided coating of the substrate (14).
8. The method of claim 7, wherein the coating comprises: the drying temperature in the first drying box (9) is T1, the drying temperature in the second drying box (10) is T2, T1/T2 is more than 1 and less than 2.4, T2 is more than or equal to 85 ℃ and more than or equal to 35 ℃, the density of the dried upper surface of the base material (14) after drying is M1, the density of the dried lower surface of the base material (14) after drying is M2, M1 is more than M2 and more than 0.1g/M2, and M1/M2 is more than 1 and less than or equal to 20.
9. The coating method of a double-sided preparation apparatus according to claim 7, characterized in that: the base material (14) is one of a polyolefin diaphragm, a polyolefin composite diaphragm, a PET diaphragm and a single-sided or double-sided ceramic coating diaphragm of the base films.
10. The coating method of a double-sided preparation apparatus according to claim 7, characterized in that: the coating machine (303) is one or more of a micro-gravure coating machine, a spraying machine and a mesh roll coating machine, and the coating is one of polyvinylidene fluoride, PMMA, alumina, boehmite and magnesium hydroxide.
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