CN102935413A - Intermittent extrusion coating method, extrusion coating head and extrusion coating machine - Google Patents
Intermittent extrusion coating method, extrusion coating head and extrusion coating machine Download PDFInfo
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- CN102935413A CN102935413A CN2012104669720A CN201210466972A CN102935413A CN 102935413 A CN102935413 A CN 102935413A CN 2012104669720 A CN2012104669720 A CN 2012104669720A CN 201210466972 A CN201210466972 A CN 201210466972A CN 102935413 A CN102935413 A CN 102935413A
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Abstract
The invention relates to an intermittent extrusion coating method, an extrusion coating head and an extrusion coating machine. The coating method includes that a first transfer roller and a second transfer roller are parellelly arranged at predetermined intervals; a base material winds the first pass roller and the second transfer roller and advances towards the same direction; an extrusion head is arranged and located on one side of the base material, the side of the base material is far away from the first transfer roller and the second roller, a seam port of the extrusion head is right opposite to the surface of the base material between the first transfer roller and the second transfer roller, and slurries can be intermittently coated towards the base material from the seam port of the extrusion head. The extrusion head can be close to the surface of the base material as much as possible so as to achieve a purpose of scumbling; the coating thickness can reach below 20 mu m; simultaneously, the problem that the base material is broken is solved; when coating is started, by means of a plurality of different structures, the surface of the base material slowly approaches the extrusion head, and the gap between the extrusion head and the surface of the base material is gradually shortened, so that the problem that the extrusion head is thick is solved; and when coating is finished, the surface of the base material is rapidly far away from the extrusion head, the gap between the extrusion head and the surface of the base material is rapidly enlarged, so that the problem of trailing is solved.
Description
Technical field
The present invention relates to a kind of batch (-type) extrusion coated method, extrusion coated head and extrusion coating machine for the lithium battery base material coating.
Background technology
Existing for the extrusion coated head on the extrusion coating machine of lithium battery coating, as shown in Figure 1, comprise extrusion head 100, back flow roll 200, described extrusion head 100 is over against described back flow roll 200, base material 300(is generally Copper Foil or aluminium foil) to walk around back flow roll 200 through the gap between back flow roll 200 and extrusion head 100 and advance to a direction, described extrusion head 100 is off and on to described base material 300 coating electric slurries 400.This extrusion coated head is due to the reason of structural design, there is the problem of four aspects all the time, the one, electric slurry is started thick, claim in industry thick, be because the extrusion coated head in order to overcome electric slurry 400 when starting to be coated with, electric slurry 400 pressure that adopt when the static friction of electric slurry 400 and the beginning that adopts are higher and produce, the 2nd, the broken belt problem, because the gap between extrusion head 100 and back flow roll 200 is (being generally 90 μ to 150 μ) of fixing when dispatching from the factory, in use, if when running into airborne particle size and being more than or equal to the size in gap, this particulate is when the gap entered between extrusion head 100 and back flow roll 200, because extrusion head 100 is firmly to rigid structure with back flow roll 200, like this, particulate is easy to base material 300 is extruded to an aperture, again due to base material 300 very thin (being generally 8 μ-12 μ), aperture one produces, under the effect of tension force, aperture can become macropore at once, and then base material 300 is by tear fracture, occur that the situation of broken belt affects the serialization production of coating machine, the 3rd, hangover is serious, and described hangover is after electric slurry 400 is painted with, and due to the salivation effect of electric slurry 400, and the jagged edge that the coating layer produced produces when ending, the quality of battery is had to very bad impact, the 4th, further thinning of electric slurry, owing to being afraid of to produce the serialization production that belt phenomenon affects coating, it is larger that people have to the gap between extrusion head 100 and base material 300 is arranged, be generally coating layer thickness 2-3 doubly, if the thickness of coating layer is 45 μ, gap width is 90-135 μ, if want to produce coating layer thickness, be 20 μ, the thickness of 15 μ or 10 μ even, if people still adopt the 2-3 of the thickness of coating layer doubly to carry out design gap width, be easy to be sandwiched by particulate in air the problem that produces broken belt in gap, therefore, at present, the extrusion coated head of this structure, its the thinnest effective coating thickness is generally to be greater than 30 μ, thinlyyer just often can produce belt phenomenon.
In order to solve thick head and the problem of trailing in prior art, people have proposed some solutions, as Chinese patent literature CN102658255 discloses a kind of batch (-type) extrusion coated method and intermittent extrusion type coating machine, described coating process comprises the following steps: when extrusion head starts to apply slurry to matrix, the slurry at extrusion head sealing place is carried out to suck-back and make backflow of slurry; When extrusion head stops applying slurry to matrix, the slurry at extrusion head sealing place is carried out to suck-back and make backflow of slurry.According to this coating process, when starting to be coated with, slurry in extrusion head is refluxed at the moment trace that starts feed, reduce and be coated on the amount of slurry on base material, can effectively control the thickness that intermittently is coated with head; And when extrusion head stops being coated with when intermittence, making equally in extrusion head slurry moment reflux, the slurry that makes to be coated on matrix can disconnect rapidly, the regularity that while so effectively controlling intermittently, afterbody trails.From the result of testing, this coating process is very high to being coated with the control requirement, if control, deviation is slightly arranged, and not only can not solve a thick problem with trailing, and also can run counter to desire on the contrary.
Summary of the invention
In order to overcome the problems referred to above, the present invention provides a kind of batch (-type) extrusion coated method, extrusion coated head and extrusion coating machine that can solve preferably the problem of coating process band of discontinuance and scumbling to society.
Technical scheme of the present invention is: provide a kind of without back flow roll batch (-type) extrusion coated method,
Arrange first and cross roller and second and cross roller, described first crosses roller and described the second mistake roller preset distance of being separated by is arranged in parallel;
Described the first mistake roller walked around by base material and described the second mistake roller is advanced towards a direction;
One extrusion head is set, and what extrusion head was positioned at base material crosses the side that roller and second is crossed roller away from first, and the sealing of described extrusion head is crossed roller and the second substrate surface of crossing between roller over against first, and from the sealing of extrusion head off and on to base material coating slurry.
Preferably, when coating finishes, described extrusion head relative with described substrate surface work away from translation.
Preferably, when coating finishes, described extrusion head is done the translation away from substrate surface perpendicular to substrate surface.
Preferably, when coating finishes, described first crosses roller strap the translation of base material do away from extrusion head.
Preferably, when coating finishes, described second crosses roller strap the translation of base material do away from extrusion head.
Preferably, when coating finishes, described first crosses roller and second crosses roller strap and base material and do the translation away from extrusion head; And described first crosses roller and described second crosses the synchronous translation of roller.
Preferably, a gap adjustment roller is set, described gap adjustment roller and extrusion head homonymy, be positioned at the below of extrusion head, and near described substrate surface; When coating finishes, described gap adjustment roller heads on base material and does the translation away from extrusion head.
Preferably, when coating starts, described extrusion head is done relative approaching translation with described substrate surface.
Preferably, when coating starts, described extrusion head approaches the translation of substrate surface perpendicular to substrate surface.
Preferably, when coating starts, described first crosses roller strap the translation that base material approaches extrusion head.
Preferably, when coating starts, described second crosses roller strap the translation that base material approaches extrusion head.
Preferably, when coating starts, described the first mistake roller and second is crossed roller strap and the translation that base material approaches extrusion head; And described first crosses roller and described second crosses the synchronous translation of roller.
Preferably, when coating starts, described gap adjustment roller approaches the translation of extrusion head.
It is a kind of without back flow roll batch (-type) extrusion coated head that the present invention also provides, and comprises that extrusion head, first crosses roller and second and cross roller, and described first crosses roller and described the second mistake roller preset distance of being separated by is arranged in parallel; Described the first mistake roller walked around by base material and described the second mistake roller is advanced towards a direction; What extrusion head was positioned at base material crosses the side that roller and second is crossed roller away from first, and the sealing of described extrusion head is crossed roller and the second substrate surface of crossing between roller over against first, and from the sealing of extrusion head off and on to base material coating slurry.
Preferably, also comprise drive unit, described drive unit drives described extrusion head to do reciprocal translation with respect to substrate surface.
Preferably, also comprise drive unit, described drive unit drives described the first mistake roller to do reciprocal translation with respect to extrusion head.
Preferably, also comprise drive unit, described drive unit drives described the second mistake roller to do reciprocal translation with respect to extrusion head.
Preferably, also comprise drive unit and gap adjustment roller, described gap adjustment roller and extrusion head homonymy, be positioned at the below of extrusion head, and near described substrate surface; Described drive unit makes described base material do reciprocal translation with respect to extrusion head by described gap adjustment roller.
Preferably, also comprise drive unit and gap adjustment roller, described gap adjustment roller and second is crossed the roller homonymy, is positioned at the oblique below of extrusion head, and near described substrate surface; Described drive unit makes described base material do reciprocal translation with respect to extrusion head by described gap adjustment roller.
The present invention also provide a kind of include above-mentioned without back flow roll batch (-type) extrusion coated head without the back flow roll intermittent extrusion type coating machine.
The present invention arranges two rollers excessively owing to having adopted, cross roller by the base material tensioning by two, and be provided with extrusion head in base material one side away from crossing roller, and the sealing of extrusion head faces the structure of the substrate surface between two mistake rollers, like this, just can be by extrusion head as much as possible near substrate surface, can reach the purpose (can reach the following thickness of coating layer 20 μ) of scumbling, simultaneously, if have within the particulate that is more than or equal to the gap between extrusion head and substrate surface enters gap, flexibility due to base material itself, can allow particulate pass through, and can not cause broken belt to base material, again, adopt multiple different structure, when coating starts, make substrate surface approach at leisure extrusion head, or make extrusion head slowly approach substrate surface, the gap between extrusion head and substrate surface is diminished gradually, and a thick problem of solution, when coating finishes, make substrate surface rapidly away from extrusion head, or extrusion head is with soon away from substrate surface, make the gap between extrusion head and substrate surface become fast large, and solve the problem of hangover.
The accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram of a kind of embodiment of existing extrusion type coating head.
Fig. 2 is the planar structure schematic diagram of an embodiment of the present invention.
Fig. 3 embodiment illustrated in fig. 2 first crosses the planar structure schematic diagram of roller after away from translation.
Fig. 4 is the planar structure schematic diagram of the second embodiment of the present invention.
Fig. 5 is the planar structure schematic diagram of the third embodiment of the present invention.
Fig. 6 is the planar structure schematic diagram of the 4th kind of embodiment of the present invention.
The specific embodiment
The invention provides a kind ofly without back flow roll batch (-type) extrusion coated method, comprise that arranging first crosses roller and second and cross roller, described first crosses roller and described the second mistake roller preset distance of being separated by is arranged in parallel; Described the first mistake roller walked around by base material and described the second mistake roller is advanced towards a direction; One extrusion head is set, and what extrusion head was positioned at base material crosses the side that roller and second is crossed roller away from first, and the sealing of described extrusion head is crossed roller and the second substrate surface of crossing between roller over against first, and from the sealing of extrusion head off and on to base material coating slurry.So, can be by extrusion head as much as possible near substrate surface, can reach the purpose of scumbling, through test, can reach the thickness of coating coating layer below 20 μ, simultaneously, if have within the particulate that is more than or equal to the gap between extrusion head and substrate surface enters gap, due to the flexibility of base material itself, can allow particulate pass through, and can not cause broken belt to base material.
In order to solve the problem of hangover, when coating finishes, described extrusion head and described substrate surface can be done relative away from translation, this away from action preferably fast away from (lower with), will make like this slurry salivation disconnection fast, and can not form hangover.This relatively away from translation, can realize by following several modes (including but not limited to), when coating finishes, described extrusion head is the translation away from substrate surface perpendicular to the substrate surface do; Or coating is while finishing, described first crosses roller strap base material and does the translation away from extrusion head; Or coating is while finishing, described second crosses roller strap base material and does the translation away from extrusion head; Or coating is while finishing, described first crosses roller and second crosses roller strap and base material and do the translation away from extrusion head; And described first crosses roller and described second crosses the synchronous translation of roller.
In addition, a gap adjustment roller can also be set in addition, described gap adjustment roller and extrusion head homonymy, be positioned at the below of extrusion head, and near described substrate surface; When coating finishes, described gap adjustment roller heads on base material and does the translation away from extrusion head, this away from action preferably fast away from, will make like this slurry salivation disconnect fast, and can not form hangover.
In order to solve a thick problem, when coating starts, described extrusion head is done relative approaching translation with described substrate surface, and this approaching action preferably slowly approaches (lower same), so just can not form a thick problem.Relatively approaching action can realize that by following several modes (including but not limited to), when coating starts, described extrusion head slowly approaches the translation of substrate surface perpendicular to substrate surface; Or, when coating starts, described first crosses roller strap the translation that base material slowly approaches extrusion head; Or, when coating starts, described second crosses roller strap the translation that base material slowly approaches extrusion head; Or, when coating starts, described the first mistake roller and second is crossed roller strap and the translation that base material slowly approaches extrusion head; And described first crosses roller and described second crosses the synchronous translation of roller.Or, when coating starts, described gap adjustment roller slowly approaches the translation of extrusion head.
Refer to Fig. 2, what Fig. 2 disclosed is a kind of without back flow roll batch (-type) extrusion coated head, comprises that extrusion head 1, first crosses roller 2 and second and cross roller 3, and described first crosses roller 1 and described second crosses roller 3 preset distance of being separated by and be arranged in parallel; Base material 4 is walked around described the first mistake roller 2 and is advanced towards a direction with described the second mistake roller 3; What extrusion head 1 was positioned at base material 4 crosses the side that roller 2 and second is crossed roller 3 away from first, and the sealing 11 of described extrusion head 1 is crossed roller 2 and the second substrate surface of crossing between roller 3 over against first, and from the sealing 11 of extrusion head 1 off and on to base material 4 coating slurries 5.Structure like this, can be by extrusion head 1 as much as possible near substrate surface, can reach the purpose of scumbling, through test, can reach the thickness of coating coating layer below 20 μ, simultaneously, if have within the particulate that is more than or equal to the gap between extrusion head 1 and substrate surface enters gap, due to the flexibility of base material 4 own, can allow particulate pass through, and can not cause broken belt to base material 4.A side at the close substrate surface of the upper lip 12 of described extrusion head 1 is established skewed slot 121, upper lip 12 is divided into to upper and lower two parts 1211,1212, be provided with several adjustment holes 122 perpendicular to skewed slot 121, be provided with a set screw 123 in each described adjustment hole 122, by regulating the degree of tightness of set screw 123, can regulate the lower part 1212 of upper lip 12 and the spacing of the sealing 11 between lower lip 13.
In order to solve a thick problem with trailing, the present invention also comprises the drive unit (not shown), and described drive unit drives described extrusion head 1 to do reciprocal translation with respect to substrate surface, when starting to be coated with, extrusion head 1 slowly approaches mutually with substrate surface, can not form the problem of thick head; When coating finishes, extrusion head 1 and substrate surface mutually fast away from, can not form the problem (lower with) of hangover.
Specifically, described drive unit can be used for driving extrusion head 1 with respect to the substrate surface translation; Also can be used for driving described the first mistake roller 2 to do reciprocal translation with respect to extrusion head 1, thereby drive base material 4, with respect to extrusion head 1, do reciprocal translation (being away from state as shown in Figure 3); Can also be used to drive described the second mistake roller 3 to do reciprocal translation with respect to extrusion head 1; Thereby drive base material 4 and do reciprocal translation with respect to extrusion head 1; Also can be simultaneously described first cross roller 2 and second and cross roller 3 and do away from or approach the translation of extrusion head 1 with base material; And described first crosses roller 2 and described second crosses the synchronous translation of roller 3.
The present invention can also be designed to comprise the structure (seeing Fig. 4 and Fig. 5) of drive unit and gap adjustment roller 6, gap adjustment roller 6 can have two kinds of different arrangements, in Fig. 4, described gap adjustment roller 6 and extrusion head 1 homonymy, be positioned at the below of extrusion head 1, and contact with described substrate surface, make base material cross roller 3 direction predetermined oblique angle to second, described predetermined angular refers to the angle (lower same) of substrate surface and vertical plane, can between the 1-20 degree, select; Described drive unit makes described base material 4 do reciprocal translation with respect to extrusion head 1 by described gap adjustment roller 6; When starting to be coated with, described gap adjustment roller 6 is to extrusion head 1 one side translations, and extrusion head 1 slowly approaches 1-2 degree (with the angle of vertical plane) mutually with substrate surface, can not form the problem of thick head; When coating finishes, described gap adjustment roller 6 is to away from extrusion head 1 one side translations, and extrusion head 1 and substrate surface fast away from, mobile 1-2 degree (with the angle of vertical plane), can not form the problem of hangover mutually.
In Fig. 5, described gap adjustment roller 6 and second is crossed roller 3 homonymies, is positioned at the oblique below of extrusion head 1, and contacts with described substrate surface, makes base material 4 to extrusion head 1 direction predetermined oblique angle 1-20 degree (with the angle of vertical plane); Described drive unit makes described base material 4 do reciprocal translation with respect to extrusion head 1 by described gap adjustment roller 6; When starting to be coated with, described gap adjustment roller 6 is to extrusion head 1 one side translations, and extrusion head 1 slowly approaches 1-2 degree (with the angle of vertical plane) mutually with substrate surface, can not form the problem of thick head; When coating finishes, described gap adjustment roller 6 is to away from extrusion head 1 one side translations, and extrusion head 1 mutually fast away from 1-2 degree (with the angle of vertical plane), can not form the problem of hangover with substrate surface.
In Fig. 6, described gap adjustment roller 6 and second is crossed roller 3 homonymies, is positioned at the oblique upper of extrusion head 1, and contacts with described substrate surface, makes base material 4 to extrusion head 1 direction predetermined oblique angle 1-20 degree (with the angle of vertical plane); Described drive unit makes described base material 4 do reciprocal translation with respect to extrusion head 1 by described gap adjustment roller 6; When starting to be coated with, described gap adjustment roller 6 is to extrusion head 1 one side translations, and extrusion head 1 slowly approaches 1-2 degree (with the angle of vertical plane) mutually with substrate surface, can not form the problem of thick head; When coating finishes, described gap adjustment roller 6 is to away from extrusion head 1 one side translations, and extrusion head 1 mutually fast away from 1-2 degree (with the angle of vertical plane), can not form the problem of hangover with substrate surface.
The present invention also provide a kind of include above-mentioned without back flow roll batch (-type) extrusion coated head without the back flow roll intermittent extrusion type coating machine.Described without the back flow roll intermittent extrusion type coating machine comprise successively discharge mechanism, without back flow roll batch (-type) extrusion coated head, apparatus for baking and receiving mechanism.
Claims (10)
1. one kind without back flow roll batch (-type) extrusion coated method, it is characterized in that:
Arrange first and cross roller and second and cross roller, described first crosses roller and described the second mistake roller preset distance of being separated by is arranged in parallel;
Described the first mistake roller walked around by base material and described the second mistake roller is advanced towards a direction;
One extrusion head is set, and what extrusion head was positioned at base material crosses the side that roller and second is crossed roller away from first, and the sealing of described extrusion head is crossed roller and the second substrate surface of crossing between roller over against first, and from the sealing of extrusion head off and on to base material coating slurry.
2. according to claim 1 without back flow roll batch (-type) extrusion coated method, it is characterized in that: when coating finishes, described extrusion head relative with described substrate surface work away from translation.
3. according to claim 2 without back flow roll batch (-type) extrusion coated method, it is characterized in that: when coating finishes, described extrusion head is done the translation away from substrate surface perpendicular to substrate surface; Or coating is while finishing, described first crosses roller strap base material and does the translation away from extrusion head; Or coating is while finishing, described second crosses roller strap base material and does the translation away from extrusion head; Or coating is while finishing, described first crosses roller and second crosses roller strap and base material and do the translation away from extrusion head; And described first crosses roller and described second crosses the synchronous translation of roller.
4. according to claim 2 without back flow roll batch (-type) extrusion coated method, it is characterized in that: a gap adjustment roller is set, and described gap adjustment roller and extrusion head homonymy, be positioned at the below of extrusion head, and near described substrate surface; When coating finishes, described gap adjustment roller heads on base material and does the translation away from extrusion head.
5. according to claim 1 and 2 without back flow roll batch (-type) extrusion coated method, it is characterized in that: when coating starts, described extrusion head is done relative approaching translation with described substrate surface.
6. according to claim 5 without back flow roll batch (-type) extrusion coated method, it is characterized in that: when coating starts, described extrusion head approaches the translation of substrate surface perpendicular to substrate surface; Or coating is while starting, described first crosses roller strap the translation that base material approaches extrusion head; Or coating is while starting, described second crosses roller strap the translation that base material approaches extrusion head; Or coating is while starting, described first crosses roller and second crosses roller strap and the translation that base material approaches extrusion head; And described first crosses roller and described second crosses the synchronous translation of roller; Or coating is while starting, described gap adjustment roller approaches the translation of extrusion head.
7. one kind without back flow roll batch (-type) extrusion coated head, comprises extrusion head, it is characterized in that: also comprise that first crosses roller and second and cross roller, described first crosses roller and described the second mistake roller preset distance of being separated by is arranged in parallel; Described the first mistake roller walked around by base material and described the second mistake roller is advanced towards a direction; What extrusion head was positioned at base material crosses the side that roller and second is crossed roller away from first, and the sealing of described extrusion head is crossed roller and the second substrate surface of crossing between roller over against first, and from the sealing of extrusion head off and on to base material coating slurry.
8. according to claim 7 without back flow roll batch (-type) extrusion coated head, it is characterized in that: also comprise drive unit, described drive unit drives described extrusion head to do reciprocal translation with respect to substrate surface; Or also comprise that drive unit, described drive unit drive described the first mistake roller to do reciprocal translation with respect to extrusion head; Or also comprise that drive unit, described drive unit drive described the second mistake roller to do reciprocal translation with respect to extrusion head.
9. according to claim 7 without back flow roll batch (-type) extrusion coated head, it is characterized in that: also comprise drive unit and gap adjustment roller, described gap adjustment roller and extrusion head homonymy, be positioned at the below of extrusion head, and contact with described substrate surface, make base material cross roller direction predetermined oblique angle to second; Described drive unit makes described base material do reciprocal translation with respect to extrusion head by described gap adjustment roller; Or also comprising drive unit and gap adjustment roller, described gap adjustment roller and second is crossed the roller homonymy, is positioned at oblique below or the oblique upper of extrusion head, and contacts with described substrate surface, makes base material to extrusion head direction predetermined oblique angle; Described drive unit makes described base material do reciprocal translation with respect to extrusion head by described gap adjustment roller.
One kind include any one claim in claim 7 to 9 described without back flow roll batch (-type) extrusion coated head without the back flow roll intermittent extrusion type coating machine.
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| CN2012104669720A CN102935413A (en) | 2012-11-19 | 2012-11-19 | Intermittent extrusion coating method, extrusion coating head and extrusion coating machine |
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| CN2012104669720A CN102935413A (en) | 2012-11-19 | 2012-11-19 | Intermittent extrusion coating method, extrusion coating head and extrusion coating machine |
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| CN104384048A (en) * | 2014-11-21 | 2015-03-04 | 中航锂电（洛阳）有限公司 | Intermittent coating pole lug gumming device and gumming machine frame thereof |
| CN113083616A (en) * | 2021-04-07 | 2021-07-09 | 深圳市曼恩斯特科技股份有限公司 | Coating extrusion die face density external adjusting device |
| CN113275199A (en) * | 2021-06-01 | 2021-08-20 | 深圳市曼恩斯特科技股份有限公司 | Coating mechanism and coating method |
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Application publication date: 20130220 |