CN103567116A - Double-sided extrusion coating method and coating device suitable for microporous base material - Google Patents
Double-sided extrusion coating method and coating device suitable for microporous base material Download PDFInfo
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- CN103567116A CN103567116A CN201310570720.7A CN201310570720A CN103567116A CN 103567116 A CN103567116 A CN 103567116A CN 201310570720 A CN201310570720 A CN 201310570720A CN 103567116 A CN103567116 A CN 103567116A
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- 238000000576 coating method Methods 0.000 title claims abstract description 85
- 239000011248 coating agent Substances 0.000 title claims abstract description 72
- 239000000463 material Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000007765 extrusion coating Methods 0.000 title claims abstract description 30
- 239000002002 slurry Substances 0.000 claims abstract description 53
- 239000000758 substrate Substances 0.000 claims description 161
- 238000001125 extrusion Methods 0.000 claims description 153
- 230000008569 process Effects 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 230000005021 gait Effects 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 239000006255 coating slurry Substances 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 230000006872 improvement Effects 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 235000009854 Cucurbita moschata Nutrition 0.000 description 4
- 240000001980 Cucurbita pepo Species 0.000 description 4
- 235000009852 Cucurbita pepo Nutrition 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007581 slurry coating method Methods 0.000 description 4
- 235000020354 squash Nutrition 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention relates to a double-sided extrusion coating method and a coating device suitable for a microporous base material. The coating device comprises a traction system, a first extrusion coating head and a second extrusion coating head, wherein the first extrusion coating head is arranged on one side of the microporous base material and is not in contact with the microporous base material; the second extrusion coating head is arranged on the other side of the microporous base material; a lower lip of the second extrusion coating head is in contact with the microporous base material in a linear contact or area contact manner; the second extrusion coating head is used for intermittently coating slurry on a base material in the direction intersecting with the moving direction of the microporous base material; the first extrusion coating head and the second extrusion coating head are arranged near the opposite positions, and are isolated by the microporous base material; the first extrusion coating head is used for coating the slurry on the line contact or area contact part of the lower lip of the second extrusion coating head and the microporous base material. The method has the advantages that double-sided coating of the microporous base material can be realized; the problem that the coatings on the double sides of the base material have different viscosity and the problems that the slurry remains on a coating roller and the base material is pierced by dry coatings are avoided.
Description
technical field
The present invention relates to a kind of two-sided extrusion coating process and apparatus for coating that is suitable for microporous substrate, be particularly suitable on microporous substrate, carrying out in lithium battery manufacturing process two-sided extrusion coating process and apparatus for coating.
background technology
The production of lithium battery generally comprises anodal substrate, negative pole substrate and barrier film, and the production of anodal substrate and negative pole substrate be unable to do without coating process.Existing coating process is divided into coating roll-type batch (-type) coating process and squash type coating process, and squash type method, because its coating precision is high, is controlled the welcome that is easily subject to user.
Existing employing squash type coating process is coated with on base material two sides, generally has two kinds of methods, and a kind of is that a minute face is successively coated with, and the first exactly one side at base material is coated with, and after being dried, then the another side of base material is coated with and is dried; The specific implementation of this mode is all generally with two groups of coating apparatus, successively the two sides of base material is coated with and is dried, and this mode equipment takes up an area large, and the initial stage has high input, and utilization rate of equipment and installations is not high; Another kind is double spread before dry, it is to adopt after the double spread of base material, while entering drying box again, row is dry, extrusion head as disclosed in Chinese patent literature CN102744183A, apparatus for coating and coating system, and the disclosed squash type unicoater of Chinese patent literature CN103230861A, all belong to this type of coating method.
In aforesaid the latter's double spread device, there is a common feature (as shown in Figure 4), that is exactly all to have two dispense tips 100,300, wherein the first dispense tip 100 coordinates the upper surface of realizing at base material 400 to carry out first surface coating with applicator roll 200, and the downside of the base material 400 of the second dispense tip 300 between applicator roll 200 and the import of baking oven 500, lower surface to base material 400 is coated with, thereby realizes the double spread to base material; The draw-gear 600 of base material 400 by being positioned at baking oven 500 rear sides is to front haulage, as shown in lead F in figure.
For the base material that above-mentioned double spread device is plane for base material, it is no problem carrying out double spread, but, along with the higher requirement to the technical indicator of lithium battery, lithium battery manufacturing need to be carried out double spread on the base material with porose (being called microporous substrate below), to improve the technical performance of lithium battery, if it is obviously inappropriate adopting traditional the first coating process, because the first coating process is that a minute face is successively coated with, the first exactly one side at base material is coated with, and after being dried, then the another side of base material is coated with and is dried, adopt and on microporous substrate, carry out in this way double spread and can produce many problems, the one, the adhesive of the coating on two sides is inconsistent, easily cause the coating shedding of the one side of rear painting, this is because first the coating of the one side of painting is after coating, understanding some coating is distributed on the substrate surface of another side through the micropore on base material, after being dried for the first time, can dry up on this surface, on this surface, be coated with for the second time and be dried again, after coating, the coated coating conjugation of residual lower this lip-deep coating and the second coating is bad for the first time, and the coating that impact is coated with for the second time and the direct combination of base material, so can cause the coating of rear painting, hold caducous problem, the 2nd, this coating upper type, employing is that dispense tip coordinates and is coated with applicator roll, so after coating for the first time, meeting residual fraction coating on applicator roll, along with the time increases, coating residual on applicator roll is just more, and this regularly shuts down applicator roll surface is cleaned with regard to needs, affects the continuous operations of coating apparatus.If adopt traditional the second coating process, i.e. double spread before dry, then row is dried while entering drying box.Although the adhesive on coating two sides is more better than above-mentioned first method,, still there is the not quite identical problem of adhesive; Also there is meeting residual fraction coating on applicator roll simultaneously, need the problem of fixed time cleaning applicator roll; Also there is the 3rd problem in the latter, exactly due to the downside of the second dispense tip base material of the import department of baking oven (be generally near) between applicator roll and the import of baking oven, the coating that remains in like this base material lower surface can be gathered in the side by applicator roll of the second dispense tip, and have influence on the coating quality of the second dispense tip, there is the unsettled problem of coating thickness, when serious, dry and hard coating also can puncture base material, causes coating substandard products.
summary of the invention
In order to overcome the problems referred to above, the present invention provides a kind of two-sided extrusion coating process and apparatus for coating that is suitable for microporous substrate to society, use the method in microporous substrate two sided coatings, not have the different problem of coating viscosity on base material two sides, and also do not exist on applicator roll residual slurry and dry and hard coating to puncture the problem of base material.
Technical scheme of the present invention is: a kind of two-sided extrusion coating process that is suitable for microporous substrate is provided,
(1), a side of the microporous substrate of sheet arrange one with non-contacting the first extrusion coated head of described microporous substrate, described the first extrusion coated head is coated on slurry on the base material in the direction of intersecting with base material direct of travel off and on;
(2), at the opposite side of the microporous substrate of sheet, a second extrusion coated head contacting with described microporous substrate is set, wherein, the lower lip of described the second extrusion coated head contacts with microporous substrate in the mode of line contact or face contact; Described the second extrusion coated head is coated on slurry on the base material in the direction of intersecting with microporous substrate direct of travel off and on;
(3), described the first extrusion coated head and described the second extrusion coated head configure near the opposed position of described microporous substrate, by described slurry, the position that lower lip contacts with described microporous substrate line or face contacts facing to described the second extrusion coated head is coated with described the first extrusion coated head.
As the improvement to above-mentioned two-sided extrusion coating process, the trailer system of advancing of described microporous substrate completes, described trailer system comprises and is positioned at the tractive unit of baking oven afterbody and is positioned at the constant speed portion before extrusion coated head, described tractive unit, for to the microporous substrate application of force, allows microporous substrate advance backward; Described constant speed portion is used for keeping base material gait of march in constant speed.
As the improvement to above-mentioned two-sided extrusion coating process, described microporous substrate at the turning of traveling process or/be to adopt pneumatically supported mode to pop-up in baking oven.
As the improvement to above-mentioned two-sided extrusion coating process, the direction of the horizontal line of described the first extrusion head and the second extrusion head is perpendicular to the direct of travel of microporous substrate.
As the improvement to above-mentioned two-sided extrusion coating process, the direction of the horizontal line of described the first extrusion head and the second extrusion head is diagonal to the direct of travel of microporous substrate.
The present invention also provides a kind of two-sided extrusion apparatus for coating that is suitable for microporous substrate, has dispensing area and non-dispensing area and is forming coating sizing-agent in the two-sided above-mentioned dispensing area of microporous substrate of sheet, and described two-sided extrusion apparatus for coating comprises:
-trailer system, makes described microporous substrate advance towards a direction;
The-the first extrusion coated head, is arranged on a side of described microporous substrate; And with described microporous substrate noncontact, described the first extrusion coated head is coated on slurry on the base material in the direction of intersecting with base material direct of travel off and on;
The-the second extrusion coated head, is arranged on the opposite side of described microporous substrate; Wherein, the lower lip of described the second extrusion coated head contacts with microporous substrate in the mode of line contact or face contact; Described the second extrusion coated head is coated on slurry on the base material in the direction of intersecting with microporous substrate direct of travel off and on;
Described the first extrusion coated head and described the second extrusion coated head configure near the opposed position of described microporous substrate, and by described slurry, the position that lower lip contacts with described microporous substrate line or face contacts facing to described the second extrusion coated head is coated with described the first extrusion coated head.
As the improvement to above-mentioned two-sided extrusion apparatus for coating, described trailer system comprises and is positioned at the tractive unit of baking oven afterbody and is positioned at the constant speed portion before extrusion coated head, and described tractive unit, for to the microporous substrate application of force, allows microporous substrate advance backward; Described constant speed portion is used for keeping base material gait of march in constant speed.
As the improvement to above-mentioned two-sided extrusion apparatus for coating, described baking oven comprises shell, in described shell, be provided with number discharged to the upper nozzles of lower spray hot gas and number discharged on spray hot gas lower nozzle, described microporous substrate is advanced between described upper nozzle and lower nozzle.
As the improvement to above-mentioned two-sided extrusion apparatus for coating, described microporous substrate at the turning of traveling process or/be to adopt pneumatically supported mode to pop-up in baking oven.
As the improvement to above-mentioned two-sided extrusion apparatus for coating, the direction of the horizontal line of described the first extrusion head and the second extrusion head is perpendicular to the direct of travel of microporous substrate; Or the direction of the horizontal line of described the first extrusion head and the second extrusion head is diagonal to the direct of travel of microporous substrate.
The present invention is owing to having removed applicator roll, the second extrusion coated head is set in the position of former applicator roll, and the lower lip of the second extrusion coated head is contacted with microporous substrate, the second extrusion coated head is played support microporous substrate and in the double action of the back side of microporous substrate coating sizing-agent, described the first extrusion coated head and described the second extrusion coated head are configured near the opposed position of described microporous substrate, by described slurry, the position that lower lip contacts with described microporous substrate line or face contacts facing to described the second extrusion coated head is coated with described the first extrusion coated head, can solve residual slurry and the different problem of two sides slurry adhesive, this is because when the position that the first extrusion coated head contacts with described microporous substrate line facing to the lower lip of the second extrusion coated head or face contacts is coated with, even if there is part slurry to be left to the position that lower lip contacts with described microporous substrate line or face contacts of the second extrusion coated head through the micropore on base material, also can be because the microporous substrate that the thing followed is advanced is backward taken away these residual slurries, and the slurry being sprayed by the second extrusion coated head covers, can not contact online or the position of face contact forms residual slurry, simultaneously, because coating time of being separated by of the first extrusion coated head and the second extrusion head is almost in moment, the described slurry that sees through micropore by the first extrusion coated head coating, by the slurry of the second dispense tip coating, covered soon, both meetings are well fused, therefore, can there is not the different problem of two sides slurry adhesive.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram of a kind of embodiment of the present invention.
Fig. 2 is the structural representation of another kind of embodiment of the present invention.
Fig. 3 is another layout schematic diagram of extrusion coated head embodiment illustrated in fig. 1.
Fig. 4 is the planar structure schematic diagram of existing double spread device.
The specific embodiment
The invention provides a kind of two-sided extrusion coating process that is suitable for microporous substrate, comprising:
(1), a side of the microporous substrate of sheet arrange one with non-contacting the first extrusion coated head of described microporous substrate, described the first extrusion coated head is coated on slurry on the base material in the direction of intersecting with microporous substrate direct of travel off and on; That is to say, the first extrusion coated head is responsible for the slurry coating on face of microporous substrate, and is to carry out off and on slurry coating, to make electrodes of lithium-ion batteries;
(2), at the opposite side of the microporous substrate of sheet, a second extrusion coated head contacting with described microporous substrate is set, wherein, the lower lip of described the second extrusion coated head contacts with microporous substrate in the mode of line contact or face contact; Described the second extrusion coated head is coated on slurry on the base material in the direction of intersecting with microporous substrate direct of travel off and on; Described the second extrusion coated head is responsible for the slurry coating on another face of microporous substrate, and is to carry out off and on slurry coating, to make electrodes of lithium-ion batteries;
(3), described the first extrusion coated head and described the second extrusion coated head configure near the opposed position of described microporous substrate, by described slurry, the position that lower lip contacts with described microporous substrate line or face contacts facing to described the second extrusion coated head is coated with described the first extrusion coated head;
This method can reach three objects, and the lower lip of described the second extrusion coated head is contacted with microporous substrate, the second extrusion coated head is played support microporous substrate and in the double action of the back side of microporous substrate coating sizing-agent, described the first extrusion coated head and described the second extrusion coated head are configured near the opposed position of described microporous substrate, by described slurry, the position that lower lip contacts with described microporous substrate line or face contacts facing to described the second extrusion coated head is coated with described the first extrusion coated head, can solve residual slurry and the different problem of two sides slurry adhesive, this is because when the position that the first extrusion coated head contacts with described microporous substrate line facing to the lower lip of the second extrusion coated head or face contacts is coated with, even if there is part slurry to be left to the position that lower lip contacts with described microporous substrate line or face contacts of the second extrusion coated head through the micropore on base material, also can be because the microporous substrate that the thing followed is advanced is backward taken away these residual slurries, and the slurry being sprayed by the second extrusion coated head covers, can not contact online or the position of face contact forms residual slurry, simultaneously, because coating time of being separated by of the first extrusion coated head and the second extrusion head is almost in moment, the described slurry that sees through micropore by the first extrusion coated head coating, by the slurry of the second dispense tip coating, covered soon, both meetings are well fused, therefore, can there is not the different problem of two sides slurry adhesive.
In above-mentioned two-sided extrusion coating process, the trailer system of advancing of described microporous substrate completes, described trailer system comprises and is positioned at the tractive unit of baking oven afterbody and is positioned at the constant speed portion before extrusion coated head, and described tractive unit, for to the microporous substrate application of force, allows microporous substrate advance backward; Described constant speed portion is used for keeping base material gait of march in constant speed, so, can guarantee that microporous substrate advances stablely, and the consistency of thickness of the coating layer on microporous substrate two sides is played to very crucial effect.
In this two-sided extrusion coating process, described microporous substrate at the turning of traveling process or/be to adopt pneumatically supported mode to pop-up in baking oven, adopt the mode of air-flotation type to play a good protection to dry or not dried coating sizing-agent layer.
In this two-sided extrusion coating process, the direction of the horizontal line of described the first extrusion head and the second extrusion head is perpendicular to the direct of travel of microporous substrate; Also can be the direct of travel that the direction of the horizontal line of described the first extrusion head and the second extrusion head is diagonal to microporous substrate.Direct of travel perpendicular to microporous substrate is suitable for the first extrusion head and the second extrusion head to be arranged on level or vertical direct of travel; And the direct of travel that is diagonal to microporous substrate is suitable for arranging when microporous substrate is turned the first extrusion head and the second extrusion head.
Refer to Fig. 1 to Fig. 3, the present invention also provides a kind of two-sided extrusion apparatus for coating that is suitable for microporous substrate, have dispensing area and non-dispensing area and forming coating sizing-agent in the two-sided above-mentioned dispensing area of microporous substrate of sheet, described two-sided extrusion apparatus for coating comprises:
-trailer system, makes described microporous substrate advance towards a direction; In the present embodiment, described trailer system comprises and is positioned at the tractive unit 11 of baking oven afterbody and is positioned at the constant speed portion 12 before extrusion coated head, and described tractive unit 11, for giving microporous substrate 13 application of forces, allows microporous substrate 13 advance backward; Described constant speed portion 12 is for keeping microporous substrate 13 gait of march in substantially constant speed; Between described constant speed portion 12 and unwinding device 17, be provided with unwinding tension checkout gear 19, by the microporous substrate 13 after drying, be pulled out after baking oven 16, through tail, advance after deviation correcting device 20 and baking oven tension detecting apparatus 21, be pulled portion 11 to rear haulage, after winding tension checkout gear 22, enter rolling-up mechanism 18 again.Unwinding device 17 in the present invention can replace with unreeling deviation correcting device, and rolling-up mechanism 18 can replace with rolling deviation correction mechanism.
The-the first extrusion coated 14, has upper lip 141 and lower lip 142, and a side surface of microporous substrate 13 is coated in the gap ejection of slurry from forming between upper lip 141 and lower lip 142; Described the first extrusion coated 14 is arranged on a side of described microporous substrate 13; And with described microporous substrate 13 noncontacts, described the first extrusion coated 14 is coated on slurry on the microporous substrate 13 in the direction of intersecting with microporous substrate 13 direct of travels off and on;
The-the second extrusion coated 15, there is upper lip 151 and lower lip 152, the gap ejection of slurry from forming between upper lip 151 and lower lip 152, coats on the opposite side surface of microporous substrate 13, and described the second extrusion coated 15 is arranged on the opposite side of described microporous substrate 13; Wherein, the lower lip 152 of described the second extrusion coated 15 contacts with microporous substrate 13 in the mode of line contact or face contact; Described the second extrusion coated 15 is coated on slurry on the microporous substrate 13 in the direction of intersecting with microporous substrate 13 direct of travels off and on;
Key of the present invention is, described the first extrusion coated 14 and described the second extrusion coated 15 configures near the opposed position of described microporous substrate 13, and by described slurry, the position 153 that lower lip 152 contacts with described microporous substrate 13 lines or face contacts facing to described the second extrusion coated 15 is coated with described the first extrusion coated 14.
So, can reach three objects, the lower lip 152 of described the second extrusion coated 15 is contacted with microporous substrate 13, the second extrusion coated 15 be played support microporous substrate 13 and in the double action of the back side of microporous substrate 13 coating sizing-agent, described the first extrusion coated 14 and described the second extrusion coated 15 configured near the opposed position of described microporous substrate 13, by described slurry, the position 153 that lower lip 152 contacts with described microporous substrate 13 lines or face contacts facing to described the second extrusion coated 15 is coated with described the first extrusion coated 14, can solve residual slurry and the different problem of two sides slurry adhesive, this is because when the first extrusion coated 14 is coated with facing to the position 153 that lower lip 152 contacts with described microporous substrate 13 lines or face contacts of the second extrusion coated 15, even if there is part slurry to see through the position 153 that lower lip 152 contacts with described microporous substrate 13 lines or face contacts that micropore on microporous substrate 13 is left to the second extrusion coated 15, also can be because the microporous substrate 13 that the thing followed is advanced is backward taken away these residual slurries, and covered by the second extrusion coated 15 slurry that sprayed, can not contact online or the position 153 of face contact forms residual slurry, simultaneously, due to the first extrusion coated the 14 and second extrusion head 15 be separated by coating time be almost in moment, the described slurry that sees through micropore by 14 coating of the first extrusion coated, by the slurry of the second dispense tip 15 coatings, covered soon, both meetings are well fused, therefore, can there is not the different problem of two sides slurry adhesive.
In above-mentioned two-sided extrusion apparatus for coating, also comprise baking oven 16, described baking oven 16 comprises shell 161, in described shell 161, be provided with number discharged to the upper nozzles 162 of lower spray hot gas and number discharged on spray hot gas lower nozzle 163, described upper nozzle 162 and described lower nozzle 163 can be to shift to install, and can be to be also oppositely arranged, and described microporous substrate 13 is advanced between described upper nozzle 162 and lower nozzle 163, while shifting to install, described microporous substrate 13 is advanced in sinusoidal wave mode at baking oven 16.At the turning of described microporous substrate 13, be provided with turning air-floating apparatus; At the rear portion of described baking oven 16, be provided with wrap-up 18; In described extrusion coated 14,15, be provided with unreeling structure 17 above.
In above-mentioned two-sided extrusion apparatus for coating, described microporous substrate 13 at the turning of traveling process or/be to adopt pneumatically supported mode to pop-up in baking oven 16; The direction of the horizontal line of described the first extrusion head 14 and the second extrusion head 15 is perpendicular to the direct of travel (referring to Fig. 1 and Fig. 2) of microporous substrate; Or, the direction of the horizontal line of described the first extrusion head 14 and the second extrusion head 15 is diagonal to the direct of travel of microporous substrate 13, referring to Fig. 3, the direct of travel that is diagonal to microporous substrate 13 is suitable for arranging when microporous substrate 13 is turned the first extrusion head 14 and the second extrusion head 15.
Claims (10)
1. a two-sided extrusion coating process that is suitable for microporous substrate, is characterized in that:
(1), a side of the microporous substrate of sheet arrange one with non-contacting the first extrusion coated head of described microporous substrate, described the first extrusion coated head is coated on slurry on the base material in the direction of intersecting with microporous substrate direct of travel off and on;
(2), at the opposite side of the microporous substrate of sheet, a second extrusion coated head contacting with described microporous substrate is set, wherein, the lower lip of described the second extrusion coated head contacts with microporous substrate in the mode of line contact or face contact; Described the second extrusion coated head is coated on slurry on the base material in the direction of intersecting with microporous substrate direct of travel off and on;
(3), described the first extrusion coated head and described the second extrusion coated head configure near the opposed position of described microporous substrate, by described slurry, the position that lower lip contacts with described microporous substrate line or face contacts facing to described the second extrusion coated head is coated with described the first extrusion coated head.
2. the two-sided extrusion coating process that is suitable for microporous substrate according to claim 1, it is characterized in that: the trailer system of advancing of described microporous substrate completes, described trailer system comprises and is positioned at the tractive unit of baking oven afterbody and is positioned at the constant speed portion before extrusion coated head, described tractive unit, for to the microporous substrate application of force, allows microporous substrate advance backward; Described constant speed portion is used for keeping base material gait of march in constant speed.
3. according to the two-sided extrusion coating process that is suitable for microporous substrate described in claim 1 or 2, it is characterized in that: described microporous substrate at the turning of traveling process or/be to adopt pneumatically supported mode to pop-up in baking oven.
4. according to the two-sided extrusion coating process that is suitable for microporous substrate described in claim 1 or 2, it is characterized in that: the direction of the horizontal line of described the first extrusion head and the second extrusion head is perpendicular to the direct of travel of microporous substrate.
5. according to the two-sided extrusion coating process that is suitable for microporous substrate described in claim 1 or 2, it is characterized in that: the direction of the horizontal line of described the first extrusion head and the second extrusion head is diagonal to the direct of travel of microporous substrate.
6. a two-sided extrusion apparatus for coating that is suitable for microporous substrate, having dispensing area and non-dispensing area and forming coating sizing-agent in the two-sided above-mentioned dispensing area of microporous substrate of sheet, is characterized in that, described two-sided extrusion apparatus for coating comprises:
-trailer system, makes described microporous substrate advance towards a direction;
The-the first extrusion coated head, is arranged on a side of described microporous substrate; And with described microporous substrate noncontact, described the first extrusion coated head is coated on slurry on the microporous substrate in the direction of intersecting with base material direct of travel off and on;
The-the second extrusion coated head, is arranged on the opposite side of described microporous substrate; Wherein, the lower lip of described the second extrusion coated head contacts with microporous substrate in the mode of line contact or face contact; Described the second extrusion coated head is coated on slurry on the microporous substrate in the direction of intersecting with microporous substrate direct of travel off and on;
Described the first extrusion coated head and described the second extrusion coated head configure near the opposed position of described microporous substrate, and by described slurry, the position that lower lip contacts with described microporous substrate line or face contacts facing to described the second extrusion coated head is coated with described the first extrusion coated head.
7. according to the two-sided extrusion apparatus for coating that is suitable for microporous substrate described in claim 6, it is characterized in that: described trailer system comprises and is positioned at the tractive unit of baking oven afterbody and is positioned at the constant speed portion before extrusion coated head, described tractive unit, for to the microporous substrate application of force, allows microporous substrate advance backward; Described constant speed portion is used for keeping microporous substrate gait of march in substantially constant speed.
8. according to the two-sided extrusion apparatus for coating that is suitable for microporous substrate described in claim 7, it is characterized in that: described baking oven comprises shell, in described shell, be provided with number discharged to the upper nozzles of lower spray hot gas and number discharged on spray hot gas lower nozzle, described microporous substrate is advanced between described upper nozzle and lower nozzle.
9. according to the two-sided extrusion apparatus for coating that is suitable for microporous substrate described in claim 6,7 or 8, it is characterized in that: described microporous substrate at the turning of traveling process or/be to adopt pneumatically supported mode to pop-up in baking oven.
10. according to the two-sided extrusion apparatus for coating that is suitable for microporous substrate described in claim 6,7 or 8, it is characterized in that: the direction of the horizontal line of described the first extrusion head and the second extrusion head is perpendicular to the direct of travel of microporous substrate; Or the direction of the horizontal line of described the first extrusion head and the second extrusion head is diagonal to the direct of travel of microporous substrate.
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| CN106076749A (en) * | 2016-08-01 | 2016-11-09 | 深圳市善营自动化股份有限公司 | Coating machine and coating process |
| CN106423740A (en) * | 2016-12-01 | 2017-02-22 | 无锡溥汇机械科技有限公司 | Lithium battery isolating membrane slurry throwing coating and drying system |
| CN106964526A (en) * | 2017-05-17 | 2017-07-21 | 深圳市信宇人科技股份有限公司 | Two-sided extrusion coating method and its double spread device based on microporous substrate |
| CN108296126A (en) * | 2017-03-13 | 2018-07-20 | 上海展枭新能源科技有限公司 | A kind of apparatus for coating and coating method being suitable for porous substrate |
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| JP7089464B2 (en) | 2018-12-18 | 2022-06-22 | 株式会社Ｓｃｒｅｅｎホールディングス | Double-sided coating equipment and coating film forming system |
| CN110339981A (en) * | 2019-07-12 | 2019-10-18 | 常州永盛新材料装备股份有限公司 | A kind of flexible parent metal two sides coating method and its equipment |
| CN115475733A (en) * | 2022-09-13 | 2022-12-16 | 深圳市海目星激光智能装备股份有限公司 | Opposite coating device |
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