CN108480138B - Extrusion coating machine die head gasket and die head with uniform coating - Google Patents
Extrusion coating machine die head gasket and die head with uniform coating Download PDFInfo
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- CN108480138B CN108480138B CN201810528307.7A CN201810528307A CN108480138B CN 108480138 B CN108480138 B CN 108480138B CN 201810528307 A CN201810528307 A CN 201810528307A CN 108480138 B CN108480138 B CN 108480138B
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- chamfer
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- 239000011248 coating agent Substances 0.000 title claims abstract description 31
- 238000000576 coating method Methods 0.000 title claims abstract description 31
- 238000007765 extrusion coating Methods 0.000 title claims description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 15
- 238000009826 distribution Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 abstract description 14
- 239000002002 slurry Substances 0.000 abstract description 14
- 239000007788 liquid Substances 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000011267 electrode slurry Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Abstract
The invention discloses a die head gasket of an extrusion coater, which comprises a cutter gasket main body, a flow baffle and a flow dividing plate, wherein the cutter gasket main body comprises a long side and two short sides, one end of the flow baffle is vertically connected with one end of the short side, the other end of the flow baffle is provided with a first chamfer, the first chamfer is formed on one side face of the flow baffle only, the thickness of the first chamfer is smaller than that of the flow baffle, the flow dividing plate is arranged between the two short sides and connected with the long side, and the other two corners of the flow dividing plate are respectively provided with a second chamfer which is formed on one side face of the flow dividing plate only. The invention has the advantages that the flow velocity of slurry flowing through the edges of the flow baffle plate and the flow dividing plate is reduced, the edge bulging phenomenon of the coating material area is obviously reduced, and the problems of consistency and safety of the battery cell capacity caused by unstable thickness of the coating material area are solved.
Description
Technical Field
The invention relates to the field of extrusion coating machines, in particular to a die head gasket of an extrusion coating machine and a die head with uniform coating.
Background
The production of the pole piece of the lithium ion battery comprises the steps of coating, rolling, slitting and the like, wherein the quality of the pole piece coating is crucial, and the consistency and the safety of the battery capacity are directly affected. The pole piece coating generally adopts an extrusion coater, a pressure cavity is arranged in a die head of the extrusion coater, and when slurry enters the extrusion coater from the middle of the pressure cavity, the slurry is uniformly coated on the surface of a substrate through a certain pressure and dried, so that the battery is manufactured. Because the feeding mode and the discharging mode of the die head of the extrusion coating machine are adopted, the feeding and the discharging of the slurry are free of buffer areas, the flow speed of the slurry flowing through the edges of the baffle plates and the edges of the flow distribution plates is extremely high, the slurry is easy to generate a bulging edge at the position of about 3-5 mm of the edge of the material area after being dried in the oven, the strip is easy to break during coating and rolling, a large amount of scrapping is caused, and the consistency and the safety of the battery capacity are seriously influenced. Meanwhile, the die head gasket is easy to shift in the installation process, the die head gasket is slightly inclined, the coating surface density and the thickness of a coating material area can be changed, and the coating quality is directly influenced by the change of the coating surface density and the thickness of the coating material area, so that the quality of a battery is influenced.
Disclosure of Invention
The invention aims to: aiming at the problems, the invention aims to provide a die head gasket of an extrusion coater and a die head which are uniformly coated, so that the slurry can keep uniform flow rate through the die head, the thickness of the pole piece is uniformly coated, the edge of a material area is not easy to generate a bulge, and the consistency of the density of a coated surface and the thickness of a coated material area is maintained.
The technical scheme is as follows:
The utility model provides an even extrusion coating machine die head gasket of coating, includes knife pad main part, fender flow board, flow distribution plate, the knife pad main part includes a long limit and two minor faces, fender flow board one end with minor face one end is connected perpendicularly, the fender flow board other end is equipped with first chamfer, first chamfer is only in one side of fender flow board is seted up, the thickness of first chamfer is less than the thickness of fender flow board, the flow distribution plate is located two between the minor face, and with long limit is connected, all be equipped with the second chamfer on two other angles of flow distribution plate, the second chamfer is only seted up in one side of flow distribution plate, the thickness of second chamfer is less than the thickness of flow distribution plate, the fender flow board with form the split-flow mouth between the flow distribution plate, the design of first chamfer and second chamfer reduces the thick liquids velocity of flow through fender flow board, flow distribution plate edge effectively.
Preferably, the length of the first chamfer and the second chamfer ranges from 0.5mm to 6mm. Specifically, the length of the first chamfer and the second chamfer is 3mm multiplied by 1mm, and when the thickness of the first chamfer and the second chamfer is 0.5mm, the flow velocity of slurry flowing through the edges of the baffle plate and the flow dividing plate is obviously reduced.
Preferably, in order to facilitate positioning of the die head gasket, the die head gasket of the extrusion coating machine further comprises a clamping groove, and the clamping groove is formed in the cutter pad main body.
The invention also discloses a die head of the extrusion coating machine, which comprises a die head gasket, an upper die head, a lower die head, a pressure cavity, a conveying pipeline and a positioning groove, wherein the pressure cavity is arranged in the lower die head, the conveying pipeline is communicated with the upper surface of the lower die head, the positioning groove is arranged along three sides of the lower die head, the die head gasket is arranged in the positioning groove and is positioned between the upper die head and the lower die head, the upper die head and the lower die head are fastened through bolts, and the positioning groove can prevent the die head gasket from shifting when the upper die head and the lower die head are fastened.
Preferably, the die head of the extrusion coating machine further comprises a positioning column, the positioning column is arranged on the lower die head, the positioning column corresponds to a clamping groove formed in the die head gasket, and the die head gasket is clamped on the positioning column and is accurate in positioning.
The beneficial effects are that: compared with the prior art, the invention has the advantages that the first chamfer and the second chamfer are arranged on the edges of the flow baffle plate and the flow distribution plate, the structural design is ingenious, the flow velocity of slurry flowing through the edges of the flow baffle plate and the flow distribution plate is reduced, the flow velocity of slurry is kept uniform, the edge bulging phenomenon of a coating material area is obviously reduced, the problems of consistency and safety of the capacity of a battery core caused by unstable thickness of the coating material area are solved, the frequency of interrupting the coating and rolling process is reduced, the scrappage is reduced, the die head gasket is quickly installed, the die head gasket is prevented from shifting, and the consistency of the density of a coating surface and the thickness of the coating material area is maintained.
Drawings
FIG. 1 is a schematic diagram of the structure of a die shim;
FIG. 2 is an enlarged partial view of portion A of FIG. 1;
FIG. 3 is an enlarged partial view of portion B of FIG. 1;
FIG. 4 is a schematic perspective view of a diverter plate;
FIG. 5 is a schematic view showing a state of coating of a die of an extrusion coater;
FIG. 6 is a schematic view of the upper die structure;
FIG. 7 is a schematic view of the lower die structure;
FIG. 8 is a schematic illustration of pole piece coating;
Fig. 9 is a graph comparing the lateral thickness of the pole piece prepared in this example and the pole piece prepared in the prior art.
Detailed Description
The present application is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the application and not limiting of its scope, and various modifications of the application, which are equivalent to those skilled in the art upon reading the application, will fall within the scope of the application as defined in the appended claims.
As shown in fig. 1-4, a die gasket of an extrusion coater for uniform coating comprises a cutter gasket body, a baffle plate 1, a flow distribution plate 2 and a clamping groove 7. The knife pad main body comprises a long side 3 and two short sides 4, and the two short sides 4 are vertically fixed at two ends of the long side 3. One end of the baffle plate 1 is vertically connected with one end of the short side 4, the surface of the baffle plate 1 is milled off and chamfered to form a first chamfer 5, and the first chamfer 5 is positioned at the other end of the baffle plate 1. The thickness of the first chamfer 5 is smaller than that of the cutter pad main body, the thickness of the first chamfer 5 is 0.5mm, and the thickness of the baffle plate 1 is 1mm. The splitter plate 2 is arranged between the two short sides 4 and is vertically fixed with the long sides 3, and the surface of the splitter plate 3 is milled off and chamfered along the side surfaces of the corners of the splitter plate 3 to form a second chamfer 6. The second chamfer 6 has all been seted up on two angles of flow distribution plate 3, and second chamfer 6 is only seted up on one side of flow distribution plate 3, and the thickness of second chamfer 6 is less than the thickness of flow distribution plate 3, and the thickness of second chamfer 6 is 0.5mm, and the thickness of flow distribution plate 3 is 1mm. A diversion opening is formed between the flow baffle plate 1 and the diversion plate 2, and the first chamfer angle 5 is positioned at the outer side of the diversion opening. The length of the first chamfer 5 and the second chamfer 6 ranges from 0.5mm to 6mm, and in this embodiment, the length of the first chamfer 5 and the second chamfer 6 is 3mm×1mm. The clamping groove 7 is formed in the cutter pad main body, and when the die head gasket 14 is installed, the clamping groove 7 is sleeved on the positioning column 13 to accurately position, so that the die head gasket 14 is prevented from moving.
As shown in fig. 5-7, the invention also discloses an extrusion coater die head for uniform coating, which comprises the die head gasket 14, an upper die head 8, a lower die head 9, a pressure cavity 10, a conveying pipeline 11, a positioning groove 12 and a positioning column 13. A pressure chamber 10 is provided in the lower die 9 for pressure stabilization during slurry transport. The delivery pipe 11 communicates with the upper surface of the lower die 9. The positioning groove 12 is formed along three sides of the lower die head 9, the thickness of the die head gasket 14 is 1mm, the die head gasket 14 is arranged in the positioning groove 12 and is positioned between the upper die head 8 and the lower die head 9, and the upper die head 8 and the lower die head 9 are fastened through bolts. The positioning columns 13 are arranged in three and are respectively arranged on three sides of the lower die head 9.
This example was coated with a positive ternary system slurry having a viscosity of 7000cp (25 ℃) and a solids content of 70%. When the slurry is coated, the back roller 15 drives the base material 16 to move, and the extrusion coater uniformly coats the positive and negative electrode slurry on the base material. The slurry is coated on the substrate 16 through a die head, a shadow part is a coating area as shown in fig. 8, the coating area is dried through an oven to manufacture a pole piece, the pole piece is subjected to a transverse thickness test, a thickness test result is shown as a circled line in fig. 9, the square block line is a transverse thickness test result of the pole piece obtained by coating by using the existing die head gasket, and the edge thickness thinning effect of the embodiment is obviously better than that of the existing pole piece.
Through setting up first chamfer and second chamfer at baffle, flow distribution plate edge, when thick liquids flowed to the shunt outlet, a part of thick liquids flowed along first chamfer, and a part flowed along the right angle, made thick liquids dispersion, obviously reduced thick liquids velocity of flow, strengthened the marginal thinning effect in material district, the drum limit phenomenon at the coating district edge that the too high velocity of flow brought was reduced. Through setting up constant head tank and reference column on the lower die, offer the draw-in groove on the die head gasket, make the die head gasket fix a position convenient accurate, it is convenient to install, keeps the uniformity of coating surface density and coating material district thickness.
Claims (7)
1. An extrusion coater die gasket for uniform coating, characterized in that: including sword pad main part, fender flow board (1), flow distribution plate (2), sword pad main part includes a long limit (3) and two minor faces (4), fender flow board (1) one end with minor face (4) one end is connected perpendicularly, fender flow board (1) other end is equipped with first chamfer (5), first chamfer (5) are only in one side of fender flow board (1) is seted up, the thickness of first chamfer (5) is less than the thickness of fender flow board (1), flow distribution plate (2) are located two between minor face (4), and with long limit (3) are connected, all be equipped with second chamfer (6) on two other angles of flow distribution plate (2), second chamfer (6) only set up in one side of flow distribution plate (2), the thickness of second chamfer (6) is less than the thickness of flow distribution plate (2), flow distribution plate (1) with form the shunt opening between flow distribution plate (2).
2. A uniformly coated extrusion coater die pad as set forth in claim 1 wherein: the length of the first chamfer (5) and the second chamfer (6) ranges from 0.5 mm to 6mm.
3. A uniformly coated extrusion coater die pad as set forth in claim 1 wherein: the length of the first chamfer (5) and the second chamfer (6) is 3mm multiplied by 1mm.
4. A uniformly coated extrusion coater die pad as set forth in claim 1 wherein: the thickness of the first chamfer (5) and the second chamfer (6) is 0.5mm.
5. A uniformly coated extrusion coating machine die shim as in any one of claims 1-4, wherein: still include draw-in groove (7), draw-in groove (7) set up in on the knife pad main part.
6. An extrusion coater die comprising the uniformly coated extrusion coater die shim of claim 1, wherein: still include die head (8), lower die head (9), pressure chamber (10), pipeline (11), constant head tank (12), pressure chamber (10) set up in lower die head (9), pipeline (11) with lower die head (9) upper surface intercommunication, constant head tank (12) are followed three sides of die head (9) are seted up down, the die head gasket is located in constant head tank (12), and be located go up die head (8) with between die head (9) down, go up die head (8) with die head (9) pass through bolt-up down.
7. An extrusion coating machine die as in claim 6 wherein: the die further comprises a positioning column (13), and the positioning column (13) is arranged on the lower die head (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810528307.7A CN108480138B (en) | 2018-05-29 | Extrusion coating machine die head gasket and die head with uniform coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810528307.7A CN108480138B (en) | 2018-05-29 | Extrusion coating machine die head gasket and die head with uniform coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108480138A CN108480138A (en) | 2018-09-04 |
| CN108480138B true CN108480138B (en) | 2024-06-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013137385A1 (en) * | 2012-03-14 | 2013-09-19 | 日産自動車株式会社 | Electrode, method for producing same, and device for producing same |
| CN205146588U (en) * | 2015-11-16 | 2016-04-13 | 惠州市创明能源科技有限公司 | Extrusion coating machine is with extrusion die head and mould headrest piece |
| CN106216171A (en) * | 2016-08-31 | 2016-12-14 | 中航锂电（洛阳）有限公司 | A kind of extrusion coating machine die head pad, extrusion die and extrusion coating machine |
| CN208527155U (en) * | 2018-05-29 | 2019-02-22 | 安徽力信能源科技有限责任公司 | It is a kind of to be coated with uniform extrusion coating machine die head gasket and die head |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013137385A1 (en) * | 2012-03-14 | 2013-09-19 | 日産自動車株式会社 | Electrode, method for producing same, and device for producing same |
| CN205146588U (en) * | 2015-11-16 | 2016-04-13 | 惠州市创明能源科技有限公司 | Extrusion coating machine is with extrusion die head and mould headrest piece |
| CN106216171A (en) * | 2016-08-31 | 2016-12-14 | 中航锂电（洛阳）有限公司 | A kind of extrusion coating machine die head pad, extrusion die and extrusion coating machine |
| CN208527155U (en) * | 2018-05-29 | 2019-02-22 | 安徽力信能源科技有限责任公司 | It is a kind of to be coated with uniform extrusion coating machine die head gasket and die head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240529 Address after: 2 Dagang Dashan Road, Zhenjiang New District, Zhenjiang City, Jiangsu Province Applicant after: Lixin (Jiangsu) Energy Technology Co.,Ltd. Country or region after: China Address before: 237300 Jinjiazhai Road, Modern Industrial Park, Jinzhai County, Lu'an City, Anhui Province Applicant before: ANHUI LIXIN ENERGY TECHNOLOGY Co.,Ltd. Country or region before: China |
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| GR01 | Patent grant |