CN221208714U - Double-cavity coating die head, lower module thereof and coating machine - Google Patents
Double-cavity coating die head, lower module thereof and coating machine Download PDFInfo
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- CN221208714U CN221208714U CN202322455914.4U CN202322455914U CN221208714U CN 221208714 U CN221208714 U CN 221208714U CN 202322455914 U CN202322455914 U CN 202322455914U CN 221208714 U CN221208714 U CN 221208714U
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- 239000011248 coating agent Substances 0.000 title claims abstract description 118
- 238000000576 coating method Methods 0.000 title claims abstract description 118
- 230000007704 transition Effects 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000007599 discharging Methods 0.000 claims abstract description 17
- 239000003973 paint Substances 0.000 claims description 13
- 230000009977 dual effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 abstract description 9
- 239000002002 slurry Substances 0.000 description 15
- 238000009827 uniform distribution Methods 0.000 description 5
- 239000006255 coating slurry Substances 0.000 description 4
- 238000000265 homogenisation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Coating Apparatus (AREA)
Abstract
The utility model provides a double-cavity coating die head, a lower module and a coating machine thereof, wherein the double-cavity coating die head comprises an upper module, a gasket and a lower module which are sequentially arranged from top to bottom, a discharge slit and a coating outlet communicated with the discharge slit are formed between the upper module and the lower module; the lower module is sequentially provided with a buffer material cavity, a transition channel, a coating cavity and a discharging channel from the discharging slit to the coating outlet, and the buffer material cavity, the transition channel, the coating cavity, the discharging channel and the coating outlet are sequentially communicated; the transition passageway includes the transition bottom surface, and from the direction of buffering material chamber to coating chamber, the transition bottom surface upwards inclines and extends, and the extension both ends of transition bottom surface are first low point and first summit respectively, and first low point is connected with the opening edge in buffering material chamber, and first summit is connected with the opening edge in coating chamber. The coater comprises the double-cavity coating die head. The utility model improves the density uniformity of the coating surface.
Description
Technical Field
The utility model relates to the technical field of battery production equipment, in particular to a double-cavity coating die head, a lower module thereof and a coating machine.
Background
The battery comprises a positive electrode plate and a negative electrode plate, wherein the positive electrode plate and the negative electrode plate are obtained by coating slurry on a current collector through a coating machine and then drying. The extrusion type coating machine comprises a double-cavity coating die head, wherein the double-cavity coating die head comprises an upper module, a gasket and a lower module which are sequentially arranged from top to bottom, a discharge slit and a coating outlet communicated with the discharge slit are formed between the upper module and the lower module; from the direction of ejection of compact slit to coating export, lower module sets gradually buffering material chamber, transition passageway, coating chamber and ejection of compact passageway, buffering material chamber, transition passageway, coating chamber, ejection of compact passageway and coating export communicate in proper order. After being pumped into the feeding pipe, the paint sequentially passes through the buffer material cavity, the flat transition channel, the paint cavity and the discharging channel, and finally is extruded from the coating outlet and coated on a workpiece.
The existing extrusion coater has the problems that the internal speed and the pressure consistency of a coating cavity are poor, the peak-valley fall of a coating layer formed by coating is relatively large, the surface density is unstable, and the performance of a battery is directly affected.
Disclosure of utility model
A first object of the present utility model is to provide a lower module of a dual-cavity coating die that homogenizes the coating paste pressure and velocity.
The second object of the present utility model is to provide a dual-cavity coating die head for homogenizing the pressure and speed of coating paste, which can improve the density uniformity of the coating surface and ensure the battery performance.
A third object of the present utility model is to provide a coater that makes the pressure and speed of the coating paste uniform, ensuring battery performance.
The lower module of the double-cavity coating die head provided by the first object of the utility model is provided with a buffer material cavity, a transition channel, a coating cavity and a discharge channel which are sequentially communicated; the transition passageway includes the transition bottom surface, and from the direction of buffering material chamber to coating chamber, the transition bottom surface upwards inclines and extends, and the extension both ends of transition bottom surface are first low point and first summit respectively, and first low point is connected with the opening edge in buffering material chamber, and first summit is connected with the opening edge in coating chamber.
The above scheme shows that the poor uniformity of the internal speed and pressure of the paint cavity is mainly caused by the fact that the transition bottom surface of the transition channel at the upstream is horizontally arranged, and the paint cavity is not sufficiently homogenized in the process of conveying the slurry into the paint cavity along the horizontal transition bottom surface after the slurry is filled in the buffer cavity. Therefore, the invention inclines the transitional bottom surface, and extends upwards from the opening edge of the buffer material cavity to the opening edge of the coating cavity, under the arrangement, when slurry fills the buffer material cavity, the slurry enters the coating cavity along the upward inclined transitional bottom surface, the inclined surface acts on the flowing of the coating in the process, and the pressure and the speed of the coating slurry are further homogenized in the width direction in the slit of the gasket, so as to ensure the uniform distribution of the slurry along the coating width direction at the outlet position, and achieve the aim of further improving the uniformity of the density of the coating surface.
The further scheme is that the included angle between the transition bottom surface and the horizontal plane is more than or equal to 15 degrees and less than or equal to 30 degrees.
From the above, through experiments, the included angle between the transitional bottom surface and the horizontal plane is more than or equal to 15 degrees and less than or equal to 30 degrees, so that a better homogenization effect can be achieved on the coating. When the included angle is larger than 30 degrees, the slurry in the coating cavity is more easily influenced to be stable and uniform as the inclination is larger.
The double-cavity coating die head provided by the second object of the utility model comprises an upper module, a gasket and a lower module which are sequentially arranged from top to bottom, wherein a discharge slit and a coating outlet communicated with the discharge slit are formed between the upper module and the lower module; the lower module is sequentially provided with a buffer material cavity, a transition channel, a coating cavity and a discharging channel from the discharging slit to the coating outlet, and the buffer material cavity, the transition channel, the coating cavity, the discharging channel and the coating outlet are sequentially communicated; the transition passageway includes the transition bottom surface, and from the direction of buffering material chamber to coating chamber, the transition bottom surface upwards inclines and extends, and the extension both ends of transition bottom surface are first low point and first summit respectively, and first low point is connected with the opening edge in buffering material chamber, and first summit is connected with the opening edge in coating chamber.
According to the scheme, the transition bottom surface is obliquely arranged and extends upwards from the opening edge of the buffer material cavity to the opening edge of the coating material cavity, under the arrangement, when slurry fills the buffer material cavity and then enters the coating material cavity along the upward-inclined transition bottom surface, the inclined surface acts on the flowing of the coating material in the process, and the pressure and the speed of the coating slurry are further homogenized in the width direction in the gasket slit, so that the uniform distribution of the slurry at the outlet position along the coating width direction is ensured, and the purpose of further improving the uniformity of the density of the coating surface is achieved.
The further scheme is that the included angle between the transition bottom surface and the horizontal plane is more than or equal to 15 degrees and less than or equal to 30 degrees.
From the above, through experiments, the inclination angle of the transitional bottom surface is more than or equal to 15 degrees and less than or equal to 30 degrees, so that a better homogenization effect can be achieved on the paint. When the included angle is larger than 30 degrees, the slurry in the coating cavity is more easily influenced to be stable and uniform as the inclination is larger.
Still further, the discharge channel includes a discharge floor, the discharge floor being connected between the coating chamber and the coating outlet in an upwardly sloped manner.
From the above, the principle of the inclined arrangement of the transitional bottom surface is the same, and the discharge bottom surface of the discharge channel between the coating cavity and the coating outlet is arranged in an upward inclined manner, so that the pressure and the speed of the coating can be further homogenized in the width direction, and the uniform distribution of the slurry along the coating width direction at the outlet position is ensured.
In a further scheme, the included angle between the discharging bottom surface and the horizontal plane is more than or equal to 15 degrees and less than or equal to 30 degrees.
From the above, through experiments, the inclination angle of the discharging bottom surface is set to be more than or equal to 15 degrees and less than or equal to 30 degrees, so that a better homogenization effect can be achieved on the paint.
In a further scheme, two extended ends of the discharging bottom surface are respectively a second low point and a second vertex, and the second vertex is connected with the edge of the opening of the coating cavity; the first vertex is located at a horizontal position higher than that of the second low point.
From the above, this arrangement makes it possible to lengthen the length of the transition floor in a limited dimension, so that the coating has a longer distance to achieve uniformity in the width direction.
Further, the paint chamber is semicircular or arc-shaped in the width direction projection.
Further, the buffer material cavity is semicircular or arc-shaped in a major arc shape in the width direction projection.
From the above, the arrangement further improves the pressure homogenization of the slurry in the buffer cavity and the coating cavity and improves the back flow, thereby achieving the purpose of improving the uniformity, stability and consistency of the coating surface density.
The third object of the present utility model provides a coater comprising the dual-cavity coating die described above.
Drawings
FIG. 1 is a block diagram of an embodiment of a dual chamber coating die of the present utility model.
Fig. 2 is a cross-sectional view in the width direction of an embodiment of a dual-cavity coating die of the present utility model.
Fig. 3 is an enlarged view at a in fig. 2.
Detailed Description
Referring to fig. 1 and 2, the coater of the present utility model comprises a dual-cavity coating die head comprising an upper die block 2, a gasket 3 and a lower die block 1 which are sequentially arranged from top to bottom, an outlet slot 100 and a coating outlet 101 which is communicated with the outlet slot 100 are formed between the upper die block 2, the gasket 3 and the lower die block 1, and the width of the outlet slot 100 is limited by the gasket 3.
From the discharge slit 100 to the coating outlet 101, a buffer cavity 11, a transition channel 13, a coating cavity 12 and a discharge channel 14 are sequentially arranged on the lower module 1 towards the upper side of the discharge slit 100, and the buffer cavity 11, the transition channel 13, the coating cavity 12 and the discharge channel 14 are sequentially communicated with the coating outlet 101. Further, as shown in fig. 1, the lower module 1 and the lower module 2 are fixedly connected by a fixing block 4 at the opposite end of the coating outlet 101.
As shown in fig. 2, the buffer chamber 11 and the paint chamber 12 are each formed in a major arc shape in the width direction projection. Wherein, lower module 1 is provided with feed inlet 10, and feed inlet 10 communicates to the bottom of buffering material chamber 11.
The transition channel 13 includes a transition bottom surface 131, referring to fig. 2 and 3, in a direction from the buffer cavity 11 to the coating cavity 12, the transition bottom surface 131 extends obliquely upward, two extending ends of the transition bottom surface 131 are respectively a first low point 1311 and a first vertex 1312, the first low point 1311 is connected with an opening edge of the buffer cavity 11, and the first vertex 1312 is connected with an opening edge of the coating cavity 12.
Wherein the discharge channel 14 comprises a discharge bottom surface 141. Referring to fig. 2 and 3, the discharge bottom 141 extends obliquely upward from the paint chamber 12 to the coating outlet 101, and the two extending ends of the discharge bottom 141 are respectively a second low point 1411 and a second peak 1412, the second peak 1412 is connected with the opening edge of the paint chamber 12, and the second peak 1412 is located at the coating outlet 101.
Referring to fig. 3, in the present embodiment, the included angle between the transition bottom surface 131 and the horizontal plane and the included angle between the discharging bottom surface 141 and the horizontal plane are both 15 degrees. In this embodiment, the highest first vertex 1312 on the transition bottom surface 131 is located at a higher level than the lowest second vertex 1411 on the discharge bottom surface 141. This arrangement allows the length of the transition floor 131 to be extended in a limited space, allowing the pigment to climb more slowly up the transition floor 131 and a more adequate distance to spread evenly across the width.
Mainly, the present invention is to set the transition bottom surface 131 obliquely and extend from the opening edge of the buffer material cavity 11 up to the opening edge of the coating material cavity 12, preferably, the inclination angle of the transition bottom surface 131 is 15 degrees or more and 30 degrees or less, under this setting, when the slurry fills the buffer material cavity 11 and enters the coating material cavity 12 along the transition bottom surface 131 which is inclined upward, the inclined surface acts on the flow of the coating material in the process, the pressure and the speed of the coating slurry are further homogenized in the width direction in the slit of the gasket, so as to ensure the uniform distribution of the slurry along the coating width direction at the outlet position, and achieve the purpose of further improving the uniformity of the density of the coating surface.
Further, the bottom surface 141 is also inclined, preferably, the inclination angle of the bottom surface 141, that is, the angle between the bottom surface and the horizontal plane is preferably 15 degrees or more and 30 degrees or less, so that the pressure and speed of the coating material can be further homogenized in the width direction to ensure uniform distribution of the slurry at the coating outlet 101 along the coating width direction.
Further, the buffer material cavity 11 and the coating material cavity 12 are arranged in a manner of being in a shape of a major arc, so that pressure uniformity of slurry in the buffer material cavity 11 and the coating material cavity 12 can be improved, and back flow can be improved.
In other embodiments, the buffer chamber and/or the paint chamber are semicircular in width-wise projection.
In other embodiments, the included angle between the transition bottom surface and/or the discharging bottom surface and the horizontal plane is preferably greater than or equal to 15 degrees and less than or equal to 30 degrees.
In other embodiments, the first top of the transition bottom is at a level lower than or equal to the level at which the second bottom of the discharge bottom is at.
Finally, it should be emphasized that the foregoing description is merely illustrative of the preferred embodiments of the utility model, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and principles of the utility model, and any such modifications, equivalents, improvements, etc. are intended to be included within the scope of the utility model.
Claims (10)
1. The upper side of the lower module of the double-cavity coating die head is provided with a buffer material cavity, a transition channel, a coating cavity and a discharge channel which are communicated in sequence;
The method is characterized in that:
The transition channel comprises a transition bottom surface, the transition bottom surface extends obliquely upwards from the buffer material cavity to the coating cavity, the extending two ends of the transition bottom surface are respectively provided with a first low point and a first vertex, the first low point is connected with the opening edge of the buffer material cavity, and the first vertex is connected with the opening edge of the coating cavity.
2. The lower module of the dual-cavity coating die of claim 1, wherein:
And the included angle between the transition bottom surface and the horizontal plane is more than or equal to 15 degrees and less than or equal to 30 degrees.
3. The double-cavity coating die head comprises an upper module, a gasket and a lower module which are sequentially arranged from top to bottom, wherein a discharge slit and a coating outlet communicated with the discharge slit are formed between the upper module and the lower module;
The lower module is sequentially provided with a buffer material cavity, a transition channel, a coating cavity and a discharging channel from the discharging slit to the coating outlet, and the buffer material cavity, the transition channel, the coating cavity, the discharging channel and the coating outlet are sequentially communicated;
The method is characterized in that:
The transition channel comprises a transition bottom surface, the transition bottom surface extends obliquely upwards from the buffer material cavity to the coating cavity, the extending two ends of the transition bottom surface are respectively provided with a first low point and a first vertex, the first low point is connected with the opening edge of the buffer material cavity, and the first vertex is connected with the opening edge of the coating cavity.
4. A dual cavity coating die according to claim 3, wherein:
And the included angle between the transition bottom surface and the horizontal plane is more than or equal to 15 degrees and less than or equal to 30 degrees.
5. A dual cavity coating die according to claim 3, wherein:
The discharge channel comprises a discharge bottom surface which is connected between the coating cavity and the coating outlet in an upward inclined manner.
6. The dual cavity coating die of claim 5, wherein:
And the included angle between the discharging bottom surface and the horizontal plane is more than or equal to 15 degrees and less than or equal to 30 degrees.
7. The dual cavity coating die of claim 6, wherein:
The two extending ends of the discharging bottom surface are respectively a second low point and a second vertex, and the second vertex is connected with the opening edge of the coating cavity;
The first vertex is positioned at a horizontal position higher than the horizontal position of the second low point.
8. The dual cavity coating die according to any one of claims 3 to 7, wherein:
The paint chamber is semicircular or arcuate in shape in a width-wise projection.
9. The dual cavity coating die according to any one of claims 3 to 7, wherein:
The buffer chamber is semicircular or arc-shaped in a major arc in a width direction projection.
10. A coater comprising a dual chamber coating die as set forth in any one of claims 3 through 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322455914.4U CN221208714U (en) | 2023-09-08 | 2023-09-08 | Double-cavity coating die head, lower module thereof and coating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322455914.4U CN221208714U (en) | 2023-09-08 | 2023-09-08 | Double-cavity coating die head, lower module thereof and coating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221208714U true CN221208714U (en) | 2024-06-25 |
Family
ID=91565406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322455914.4U Active CN221208714U (en) | 2023-09-08 | 2023-09-08 | Double-cavity coating die head, lower module thereof and coating machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221208714U (en) |
-
2023
- 2023-09-08 CN CN202322455914.4U patent/CN221208714U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |