Film making device and film making production line

Abstract

The utility model discloses a film making device and a film making production line, and the film making device comprises a first compression roller which rotates around the axis of the first compression roller; the second compression roller is adjacent to the first compression roller, a blanking area is formed between the second compression roller and the first compression roller, and the second compression roller can rotate around the roller surface of the first compression roller. The technical scheme provided by the utility model can adapt to different powder materials, so that the compatibility of the film making device is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a film-making device and a film-making production line. Background Art

[0002] In the film production process, since the powder is quantitatively fed through the silo and squeezed into a film by the pressing roller, the powder feeding uniformity is inconsistent due to the different diameters of different powders. Different powders passing through a film making device will affect the quality and strength of the film. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a new film-making device and a film-making production line.

[0004] According to a first aspect of an embodiment of the present application, a film making device is provided, comprising:

[0005] A first pressing roller, the first pressing roller rotates around its own axis;

[0006] The second pressing roller is adjacent to the first pressing roller and forms a blanking area, and the second pressing roller can rotate around the roller surface of the first pressing roller.

[0007] Optionally, the diameter of the first pressing roller is the same as the diameter of the second pressing roller.

[0008] Optionally, the film-making device further comprises a material discharge component, wherein the material discharge component is located upstream of the first pressing roller and the second pressing roller, and the material discharge component is used for conveying powder to the material discharge area.

[0009] Optionally, the material discharge assembly has a material discharge port, and the material discharge port has a first extension line extending in the second direction toward the first pressing roller and the second pressing roller;

[0010] The diameter of the second pressing roller in the second direction has a second extension line, and the first extension line and the second extension line have a distance in the first direction, and the distance is located on the left or right side of the first extension line;

[0011] The first direction intersects the second direction.

[0012] Optionally, in the first direction, the first pressing roller and the second pressing roller are arranged side by side, and the second pressing roller can rotate 0°-10° clockwise or counterclockwise around the roller surface of the first pressing roller.

[0013] Optionally, the film making device further comprises:

[0014] A detection mechanism, the detection mechanism is arranged on the blanking component, and the detection mechanism is used to detect the blanking amount of the blanking component;

[0015] A driving mechanism, wherein a driving end of the driving mechanism is connected to the second pressing roller, and the driving mechanism is capable of driving the second pressing roller to rotate around a roller surface of the first pressing roller;

[0016] A control unit is communicatively connected with the detection mechanism and the driving mechanism respectively.

[0017] Optionally, the second pressing roller can rotate around its own axis, and the rotation direction of the second pressing roller around its own axis is opposite to the rotation direction of the first pressing roller around its own axis.

[0018] Optionally, the film making device further comprises a thinning roller assembly, wherein the thinning roller assembly is located downstream of the first roller and the second roller, and the thinning roller assembly is used to reduce the thickness of the film.

[0019] Optionally, the thinning roller assembly includes a plurality of third rollers, the plurality of third rollers are arranged side by side, and two adjacent third rollers rotate in opposite directions around their own axes.

[0020] According to a second aspect of an embodiment of the present application, a film production line is provided, comprising the above-mentioned film making device.

[0021] One technical effect of the embodiments of the present application is that it can adapt to different powders, thereby improving the compatibility of the film-making device; and only rough adjustment of the feeding amount is required, which is less demanding than the existing feeding method.

[0022] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0024] Figure 1 It is a structural schematic diagram of a film-making device in an embodiment of the present application;

[0025] Figure 2 Schematic diagram of the structure of the first pressing roller and the second pressing roller in the embodiment of the present application;

[0026] Figure 3 Schematic diagram of the structure in which the first pressing roller is located at different positions of the second pressing roller in the embodiment of the present application;

[0027] Figure 4 Schematic diagram of the structure of the first pressing roller and the second pressing roller in the embodiment of the present application.

[0028] Description of reference numerals:

[0029] The first pressing roller 1; the second pressing roller 2; the material dropping area 3; the material storage area 31; the compacting area 32; the material unloading assembly 4; the powder material silo 41; the material discharge port 42; the thinning pressing roller assembly 5; the third pressing roller 51; the diaphragm 6; the first extension line a; the second extension line b; the spacing h. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0033] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0034] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] The “upstream” mentioned in the embodiments of the present application refers to the process before this process, and the “downstream” refers to the process after this process.

[0036] like Figure 1-Figure 4 As shown, according to the first aspect of an embodiment of the present application, a film making device is provided, comprising a first pressing roller 1 and a second pressing roller 2; the first pressing roller 1 rotates around its own axis; the second pressing roller 2 is adjacent to the first pressing roller 1 and forms a blanking area 3, and the second pressing roller 2 can rotate around the roller surface of the first pressing roller 1.

[0037] like Figure 1 As shown, the film making device includes a first pressing roller 1 and a second pressing roller 2.

[0038] The first pressing roller 1 and the second pressing roller 2 are arranged adjacent to each other, and there is a roller gap between the first pressing roller 1 and the second pressing roller 2, and the roller gap is used to pass the powder, and the powder is pressed into a film 6 by the first pressing roller 1 and the second pressing roller 2. The first pressing roller 1 and the second pressing roller 2 are both cylindrical, and the first pressing roller 1 and the second pressing roller 2 are arranged adjacent to each other. The roller surface of the first pressing roller 1 is an arc surface, and the roller surface of the second pressing roller 2 is an arc surface. A storage space is formed between the roller surface of the first pressing roller 1 and the roller surface of the second pressing roller 2, and the storage space is the blanking area 3. The blanking area 3 is used to store the powder, and the blanking area 3 is connected to the roller gap. The powder will enter the roller gap in the blanking area 3, so that the powder is pressed into a film 6 by the first pressing roller 1 and the second pressing roller 2.

[0039] In the prior art, different powders have different particle diameters. The larger the particle diameter of the powder, the smaller the amount that enters the roller gap between the first pressing roller 1 and the second pressing roller 2, and the thinner the membrane 6 pressed by the first pressing roller 1 and the second pressing roller 2; if the particle diameter of the powder is smaller, the larger the amount that enters the roller gap between the first pressing roller 1 and the second pressing roller 2, and the thicker the membrane 6 pressed by the first pressing roller 1 and the second pressing roller 2, which will affect the production quality of the membrane 6.

[0040] To further illustrate, the first roller 1 can rotate around its own axis, and the second roller 2 can rotate around the roller surface of the first roller 1. Since the blanking area 3 is formed by the accommodating space between the roller surface of the first roller 1 and the roller surface of the second roller 2, as shown in FIG. Figure 2 As shown, the material dropping area 3 includes a material storage area 31 and a compacting area 32. When the second pressing roller 2 rotates around the roller surface of the first pressing roller 1, the size of the material dropping area 3 can be adjusted, thereby the size of the material storage area 31 and the compacting area 32 can also be adjusted to control the amount of powder entering the roller gap between the first pressing roller 1 and the second pressing roller 2.

[0041] To further illustrate, if the particle diameter of the powder is larger, the second pressing roller 2 rotates around the roller surface of the first pressing roller 1, increasing the material storage area 31 and the compacting area 32, and thus increasing the amount of powder accommodated in the blanking area 3, thereby increasing the amount of powder entering the roller gap between the first pressing roller 1 and the second pressing roller 2, so as to control the thickness of the diaphragm 6 within a preset thickness; if the particle diameter of the powder is smaller, the second pressing roller 2 rotates around the roller surface of the first pressing roller 1, reducing the material storage area 31 and the compacting area 32, and thus reducing the amount of powder accommodated in the blanking area 3, thereby reducing the amount of powder entering the roller gap between the first pressing roller 1 and the second pressing roller 2, so as to control the thickness of the diaphragm 6 within a preset thickness.

[0042] Therefore, the film-making device provided in the embodiment of the present application can adapt to different powders, thereby improving the compatibility of the film-making device; and only rough adjustment of the feeding amount is required, which is lower than the existing feeding method.

[0043] In an optional implementation, the diameter of the first pressing roller 1 is the same as the diameter of the second pressing roller 2 .

[0044] Further explanation, since the first roller 1 rotates around its own axis, the second roller 2 also rotates around its own axis. If the diameter of the first roller 1 is different from that of the second roller 2, the first roller 1 and the second roller 2 need to be adjusted to different rotation speeds, which requires a higher adjustment accuracy to make the length of the roller surface of the first roller 1 rotate the same as the length of the roller surface of the second roller 2 rotate in the same time. When the diameter of the first roller 1 is the same as that of the second roller 2, it is only necessary to make the rotation speed of the first roller 1 the same as that of the second roller 2, so that the length of the roller surface of the first roller 1 rotates the same as that of the second roller 2 in the same time. Therefore, the diameter of the first roller 1 is the same as that of the second roller 2, which facilitates the adjustment of the rotation speed of the first roller 1 and the rotation speed of the second roller 2.

[0045] In an optional embodiment, the film-making device further includes a material discharge component 4 , which is located upstream of the first pressing roller 1 and the second pressing roller 2 , and is used for conveying powder to the material discharge area 3 .

[0046] like Figure 1 As shown, the film-making device further includes a material discharge component 4 , which is located upstream of the first pressing roller 1 and the second pressing roller 2 , and is used for conveying powder to the material discharge area 3 .

[0047] To further explain, the unloading component 4 includes a powder silo 41, which is provided with a discharge port 42. In the second direction, the discharge port 42 of the powder silo 41 is located above the unloading area 3. Powder is placed in the powder silo 41, and the powder flows out from the discharge port 42 of the powder silo 41 and falls into the unloading area 3.

[0048] In an optional embodiment, the discharge assembly 4 has a discharge port 42, and the discharge port 42 has a first extension line a extending in the second direction toward the first pressure roller 1 and the second pressure roller 2; the diameter of the second pressure roller 2 in the second direction has a second extension line b, and the first extension line a and the second extension line b have a spacing h in the first direction, and the spacing h is located on the left or right side of the first extension line a; the first direction intersects with the second direction.

[0049] like Figure 3 As shown, the discharge assembly 4 has a discharge port 42. In the second direction, the discharge port 42 is located above the discharge area 3. In the second direction, the discharge port 42 extends toward the discharge area 3 to form a first extension line a. The first extension line a can be extended from the edge or center point of the discharge port 42.

[0050] In the second direction, the diameter of the second pressing roller 2 has a second extension line b, which is parallel to the first extension line a. The second extension line b and the first extension line a have a spacing h in the first direction, and the spacing h is located on the left or right side of the first extension line a.

[0051] Among them, the left side or the right side is Figure 3 Left or right side of the marker.

[0052] To further illustrate, when the first pressing roller 1 and the second pressing roller 2 are arranged side by side in the first direction, the distance h between the first extension line a and the second extension line b is the largest, and the blanking area 3 can accommodate the most powder; when the second pressing roller 2 rotates along the roller surface of the first pressing roller 1, the distance h between the first extension line a and the second extension line b gradually decreases, and the blanking area 3 can accommodate non-powder material and also gradually decreases; if the first extension line a and the second extension line b overlap, part of the material at the discharge port 42 will not fall into the blanking area 3, so the first extension line a and the second extension line b need to have a distance h so that the powder can fall into the blanking area 3.

[0053] Therefore, the distance h between the first extension line a and the second extension line b is limited to limit the rotation angle of the second pressing roller 2 to prevent the powder from falling into the drop zone 3.

[0054] In an alternative embodiment, Figure 4 As shown, in the first direction, the first pressing roller 1 and the second pressing roller 2 are arranged side by side, and the second pressing roller 2 can rotate 0°-10° clockwise or counterclockwise around the roller surface of the first pressing roller 1. Within this angle range, a variety of powder materials can be accommodated, and the powder materials will not fall outside the drop zone 3.

[0055] In an optional embodiment, the film making device also includes a detection mechanism, a driving mechanism and a control unit, the detection mechanism is arranged on the unloading component 4, and the detection mechanism is used to detect the unloading amount of the unloading component 4; the driving end of the driving mechanism is connected to the second pressing roller 2, and the driving mechanism can drive the second pressing roller 2 to rotate around the roller surface of the first pressing roller 1; the control unit is respectively communicated with the detection mechanism and the driving mechanism.

[0056] To further explain, the film-making device also includes a detection mechanism, a driving mechanism and a control unit.

[0057] Among them, the detection mechanism is arranged in the blanking component 4, and the detection mechanism is used to detect the blanking amount of the blanking component 4; the driving end of the driving mechanism is connected to the second pressing roller 2, and the driving mechanism can drive the second pressing roller 2 to rotate around the roller surface of the first pressing roller 1; the control unit is communicatively connected to the detection mechanism, and the control unit is communicatively connected to the driving mechanism, and the control unit can obtain the detection data of the detection mechanism, and send instructions to the driving mechanism according to the detection data items, and the driving mechanism drives the second pressing roller 2 to rotate around the roller surface of the first pressing roller 1 according to the instruction cooling, so as to adjust the size of the blanking area 3, so that the size of the blanking area 3 can be automatically adjusted according to the blanking amount to improve production efficiency.

[0058] In an optional embodiment, the second pressing roller 2 can rotate around its own axis, and the rotation direction of the second pressing roller 2 around its own axis is opposite to the rotation direction of the first pressing roller 1 around its own axis.

[0059] To further illustrate, the second pressing roller 2 can rotate around its own axis, and the first pressing roller 1 can also rotate around its own axis, and the rotation direction of the second pressing roller 2 around its own axis is opposite to the rotation direction of the first pressing roller 1 around its own axis.

[0060] If the rotation direction of the first pressing roller 1 around its own axis is the same as the rotation direction of the second pressing roller 2 around its own axis, the powder located in the blanking area 3 will be driven by the first pressing roller 1 to move toward the roller gap between the first pressing roller 1 and the second pressing roller 2, while the second pressing roller 2 will drive the powder to move away from the roller gap between the first pressing roller 1 and the second pressing roller 2, thereby affecting the powder entering the roller gap between the first pressing roller 1 and the second pressing roller 2, and also affecting the film forming quality of the diaphragm 6.

[0061] Therefore, the rotation direction of the first pressure roller 1 around its own axis is opposite to the rotation direction of the second pressure roller 2 around its own axis, and the direction of the friction force between the first pressure roller 1 and the diaphragm 6 is the same as the direction of the friction force between the second pressure roller 2 and the diaphragm 6, thereby driving the diaphragm 6 to move in a preset direction.

[0062] In an optional embodiment, the film making device further includes a thinning roller assembly 5 , which is located downstream of the first roller 1 and the second roller 2 , and is used to reduce the thickness of the film 6 .

[0063] like Figure 1 As shown, the film making device also includes a thinning roller assembly 5, which is arranged downstream of the first roller 1 and the second roller 2. The film 6 pressed by the first roller 1 and the second roller 2 will be transferred to the thinning roller assembly 5 for thinning treatment, so that the film 6 reaches the target thickness.

[0064] In an optional implementation, the thinning roller assembly 5 includes a plurality of third rollers 51 , the plurality of third rollers 51 are arranged side by side, and two adjacent third rollers 51 rotate in opposite directions around their own axes.

[0065] like Figure 1 As shown, the thinning roller assembly 5 includes a plurality of third rollers 51, which are arranged side by side along a first direction, and a roller gap is provided between two adjacent third rollers 51. In the moving direction of the membrane 6, the size of the roller gap between two adjacent third rollers 51 decreases successively, so that the thickness of the membrane 6 can be gradually thinned to the target thickness.

[0066] Further explanation: the third roller 51 can rotate around its own axis, and the rotation directions of two adjacent third rollers 51 around their own axis are opposite. The direction of the friction force between one of the third rollers 51 and the diaphragm 6 is the same as the direction of the friction force between the other third roller 51 and the diaphragm 6, so that the diaphragm 6 can be driven to move in a preset direction, that is, when one of the third rollers 51 drives the diaphragm 6 to move toward the roller gap between the two adjacent third rollers 51, the other third roller 51 will also drive the diaphragm 6 to move toward the roller gap between the two adjacent third rollers 51. The two adjacent third rollers 51 work together to thin the diaphragm 6 and move the diaphragm 6 to the roller gap between the next two adjacent third rollers 51. Thereby, the thinning roller assembly 5 can continuously and gradually thin the diaphragm 6 to the target thickness.

[0067] It is further explained that by providing a plurality of third pressing rollers 51 to thin the diaphragm 6 , the structure is simple and the connectivity is high, and the production rhythm of the diaphragm 6 will not be affected.

[0068] In an optional embodiment, the film making assembly further includes an arc guide rail, the second pressing roller 2 is slidably connected to the arc guide rail, and the second pressing roller 2 can move along the arc guide rail. The second pressing roller 2 is slidably connected to the arc guide rail, so that the second pressing roller 2 can move along a predetermined direction, thereby preventing the second pressing roller 2 from deviating from the direction, and further preventing the roller gap between the second pressing roller 2 and the first pressing roller 1 from becoming larger or smaller.

[0069] According to a second aspect of an embodiment of the present application, a film production line is provided, comprising the above-mentioned film making device.

[0070] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A film-making device, characterized in that: include: A first pressing roller, the first pressing roller rotates around its own axis; The second pressing roller is adjacent to the first pressing roller and forms a blanking area. The second pressing roller can rotate around the roller surface of the first pressing roller and can adjust the size of the blanking area.

2. The film forming device according to claim 1, characterized in that: The diameter of the first pressing roller is the same as the diameter of the second pressing roller.

3. The film forming device according to claim 1, characterized in that: The film-making device further comprises a material discharge component, which is located upstream of the first pressing roller and the second pressing roller, and is used for conveying powder to the material discharge area.

4. The film forming device according to claim 3, characterized in that: The material discharge assembly has a material discharge port, and the material discharge port has a first extension line extending in the second direction toward the first pressing roller and the second pressing roller; The diameter of the second pressing roller in the second direction has a second extension line, and the first extension line and the second extension line have a distance in the first direction, and the distance is located on the left or right side of the first extension line; The first direction intersects the second direction.

5. The film forming device according to claim 3, characterized in that: In a first direction, the first pressing roller and the second pressing roller are arranged side by side, and the second pressing roller can rotate 0°-10° clockwise or counterclockwise around the roller surface of the first pressing roller.

6. The film forming device according to claim 3, characterized in that: The film making device also includes: A detection mechanism, the detection mechanism is arranged on the blanking component, and the detection mechanism is used to detect the blanking amount of the blanking component; A driving mechanism, wherein a driving end of the driving mechanism is connected to the second pressing roller, and the driving mechanism is capable of driving the second pressing roller to rotate around a roller surface of the first pressing roller; A control unit is communicatively connected with the detection mechanism and the driving mechanism respectively.

7. The film forming device according to claim 1, characterized in that: The second pressing roller can rotate around its own axis, and the rotation direction of the second pressing roller around its own axis is opposite to the rotation direction of the first pressing roller around its own axis.

8. The film forming device according to claim 1, characterized in that: The film making device also includes a thinning roller assembly, which is located downstream of the first roller and the second roller, and is used to reduce the thickness of the film.

9. The film forming device according to claim 8, characterized in that: The thinning roller assembly comprises a plurality of third rollers, the plurality of third rollers are arranged side by side, and two adjacent third rollers rotate in opposite directions around their own axes.

10. A film production line, characterized in that: It comprises a film-making device as described in any one of claims 1 to 9.

Images