A film material winding process and winding device

Abstract

The present invention provides a film material winding process, comprising the following steps: winding the film material, inserting a buffer strip, and continuing to wind the film material, so that the buffer strip is wound together with the film material and is circumferentially distributed between the film materials. The present invention also provides a film material winding device, comprising a frame and a film material winding mechanism and a buffer strip inserting mechanism arranged on the frame, the film material winding mechanism comprises a film material winding core, a first driving element and a guide roller, the buffer strip inserting mechanism comprises a roller and a second driving element, and the circumferential surface of the roller is provided with a receiving groove for transferring the buffer strip to the surface of the film material. The present invention can avoid the problems of edge collapse and deformation of the film material during the winding process, greatly improve the winding length of a single roll of the film material, effectively release the internal stress of the film material, prevent the film material from shrinking, and achieve good thickness consistency of the film material; the buffer strip inserting mechanism has a simple and reasonable structure, can realize automated operation, has high efficiency, and reduces enterprise costs.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm production, and in particular to a film material winding process and a winding device thereof. Background Art

[0002] With the rapid development of the lithium battery market, the requirements for diaphragm quality are also increasing. Diaphragms play an important role in the application of lithium batteries. At present, lithium battery diaphragms are prone to edge collapse and deformation during the winding process, resulting in a short winding length of a single roll of diaphragm. At the same time, as time goes by, the internal stress of the diaphragm is released, which can easily cause the diaphragm to shrink and affect the consistency of thickness. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a film material winding process and a winding device thereof, which can avoid problems such as edge collapse and deformation of the film material during the winding process, greatly increase the winding length of a single roll of the film material, and at the same time, can effectively release the internal stress of the film material, prevent the film material from shrinking, and ensure good thickness consistency of the film material.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A film material winding process comprises the following steps:

[0006] Step 1: Rolling up the film material, rolling the film material onto the film material roll core to obtain a film material roll;

[0007] Step 2: Place the buffer strip. When the film is rolled to a certain length, place the buffer strip with the same length direction as the width direction of the film on the surface of the film, so that the buffer strip is rolled up with the film and distributed circumferentially on the outer surface of the film roll.

[0008] Step 3: Continue to roll up the film material so that the film material continues to roll up a certain length on the outer surface of the buffer strip;

[0009] Step 4: Repeat steps 2 and 3 until the roll diameter of the film material reaches the winding requirement;

[0010] As a preferred solution, in step 2, when the length of the film material roll reaches 500-1000m, the buffer strip is placed.

[0011] As a preferred solution, the buffer strip is a silicone strip.

[0012] As a preferred solution, the buffer strip has a width of 5-50 mm and a height of 1-30 mm.

[0013] A film winding device comprises a frame and a film winding mechanism and a buffer strip delivery mechanism arranged on the frame, the film winding mechanism comprises a film winding core, a first driving element driving the film winding core to rotate and a guide roller for guiding the film to the film winding core, the buffer strip delivery mechanism comprises a roller and a second driving element driving the roller to rotate, the circumferential surface of the roller is provided with a receiving groove for transferring the buffer strip to the surface of the film, the receiving groove extends along the axial direction of the roller, the receiving groove is provided with a first suction hole for sucking the buffer strip, and the first suction hole is connected to a vacuum pump through a suction pipe.

[0014] As a preferred solution, the buffer strip has a bottom plane and an arc surface, the shape of the receiving groove corresponds to the arc surface, and when the buffer strip is placed, the bottom plane of the buffer strip fits with the surface of the film material.

[0015] As a preferred embodiment, the buffer strip delivery mechanism also includes a film removal mechanism for removing the packaging film on the bottom plane of the buffer strip. The film removal mechanism is arranged on one side of the drum. The film removal mechanism includes a film removal plate and a film removal driving element for controlling the movement of the film removal plate. The film removal plate is provided with a second suction hole for sucking the packaging film.

[0016] As a preferred solution, the buffer bar delivery mechanism further includes a buffer bar loading mechanism for conveying the buffer bar into the accommodating groove.

[0017] As a preferred solution, the buffer strip is a silicone strip.

[0018] As a preferred solution, the buffer strip has a width of 5-50 mm and a height of 1-30 mm.

[0019] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, 1. By setting a buffer strip that is rolled up together with the film material, the buffer strip is circumferentially distributed between the film materials, which can avoid the problems of edge collapse and deformation of the film material during the rolling process, greatly improve the rolling length of a single roll of the film material, and at the same time, the internal stress of the film material can be effectively released to prevent the film material from shrinking, so that the thickness consistency of the film material is good; 2. By setting a roller for placing the buffer strip and a driving motor for driving the roller to rotate, the roller rotates at a certain speed, and the buffer strip is evenly placed on the surface of the film material in coordination with the speed of film rolling. The structural setting is simple and reasonable, and can realize automated operation with high efficiency and reduce enterprise costs.

[0020] In order to more clearly explain the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the assembly structure of the film material winding device of the present invention;

[0022] Figure 2 It is a side view of the film material winding device of the present invention;

[0023] Figure 3 It is a schematic diagram of the packaging film removal state of the film material winding device of the present invention;

[0024] Figure 4 It is a schematic diagram of a film coil of a film coiling device of the present invention.

[0025] Description of the accompanying drawings:

[0026] 10-film material core; 11-guide roller; 20-roller;

[0027] 21- buffer strip feeding mechanism; 22- film removal plate; 23- containing tank;

[0028] 30- buffer strip; 31- packaging film; 40- film material. DETAILED DESCRIPTION

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the positions or elements referred to must have specific directions, be constructed and operated in specific directions. Therefore, they should not be understood as limitations on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1-4 As shown, a film material winding process includes the following steps:

[0032] Step 1: Roll up the film material 40, and roll the film material 40 onto the film material roll core 10 to obtain a film material roll;

[0033] Step 2: Putting in the buffer strip 30. When the film material 40 is rolled up to a certain length, the buffer strip 30 having the same length direction as the width direction of the film material 40 is put on the surface of the film material 40, so that the buffer strip 30 is rolled up with the film material 40 and distributed circumferentially on the outer surface of the film material roll;

[0034] Step 3: Continue to roll up the film material 40, so that the film material 40 continues to roll up a certain length on the outer surface of the buffer strip 30;

[0035] Step 4: Repeat steps 2 and 3 until the roll diameter of the film material reaches the winding requirement;

[0036] In step 2, when the length of the film material roll reaches 500-1000m, a buffer strip 30 is put in, wherein the buffer strip 30 is a silicone strip, and the width of the buffer strip 30 is 5-50mm and the height is 1-30mm.

[0037] like Figure 1-4 As shown, a film winding device includes a frame and a film winding mechanism and a buffer strip delivery mechanism arranged on the frame, the film winding mechanism includes a film core 10, a first driving element for driving the film core 10 to rotate, and a guide roller 11 for guiding a film 40 to the film core 10, the first driving element is a first driving motor (not shown in the figure), the buffer strip delivery mechanism includes a roller 20 and a second driving element for driving the roller 20 to rotate, the second driving element is a second driving motor (not shown in the figure), the circumferential surface of the roller 20 is provided with a receiving groove 23 for transferring the buffer strip 30 to the surface of the film 40, the receiving groove 23 extends along the axial direction of the roller 20, the receiving groove 23 is provided with a first suction hole for sucking the buffer strip 30, the first suction hole is connected to a vacuum pump through a suction pipe, the buffer strip 30 has a bottom plane and a circular arc surface, the shape of the receiving groove 23 corresponds to the circular arc surface, and when the buffer strip 30 is delivered, the bottom plane of the buffer strip 30 is in contact with the surface of the film 40.

[0038] In this embodiment, the buffer bar delivery mechanism also includes a film removal mechanism for removing the packaging film 31 on the bottom plane of the buffer bar 30. The film removal mechanism is arranged on one side of the drum 20. The film removal mechanism includes a film removal plate 22 and a film removal driving element for controlling the movement of the film removal plate 22. The film removal driving element is a cylinder (not shown in the figure). The film removal plate 22 is provided with a second suction hole for sucking the packaging film 31. A collection box for collecting the packaging film 31 is provided under the film removal mechanism. The buffer bar delivery mechanism also includes a buffer bar loading mechanism 21 for conveying the buffer bar 30 into the accommodating groove 23. The buffer bar 30 is a silicone strip. The width of the buffer bar 30 is 5-50mm and the height is 1-30mm.

[0039] The working principle of the present invention is as follows: when the film material roll core 10 is winding 500-1000m of film material 40, the buffer strip feeding mechanism 21 conveys the buffer strip 30 to the accommodating groove 23, the vacuum pump works, the first suction hole in the accommodating groove 23 sucks the buffer strip 30, and the second driving motor controls the roller 20 to rotate at a certain speed. When the buffer strip 30 reaches the bottom of the film removal plate 22, the second suction hole on the film removal plate 22 sucks the packaging film 31 on the buffer strip 30, and the film removal cylinder controls the film removal plate 22 to move so that the packaging film 31 is separated from the buffer strip 30. When the buffer strip 30 is located at the lower end of the roller 20, the buffer strip 30 is separated from the accommodating groove 23 under the action of its own gravity and falls onto the surface of the film material 40, and is wound up together with the film material 40. After the buffer strip 30 is put in for one week, the roller 20 stops rotating, and the film material roll core 10 continues to wind up the next 500-1000m of film material 40, and then repeats the operation of putting in the buffer strip 30.

[0040] To summarize, the present invention provides a buffer strip that is rolled up together with the film material, and the buffer strip is circumferentially distributed between the film materials. This can avoid the problems of edge collapse and deformation of the film material during the rolling process, greatly improve the rolling length of a single roll of the film material, and at the same time, can effectively release the internal stress of the film material to prevent the film material from shrinking, so that the thickness of the film material is consistent. By providing a roller for placing the buffer strip and a driving motor for driving the roller to rotate, the roller rotates at a certain speed, and the buffer strip is evenly placed on the surface of the film material in coordination with the speed of film rolling. The structural setting is simple and reasonable, and can realize automated operation with high efficiency, thereby reducing enterprise costs.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made to the above embodiment based on the technical practice of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A film winding device, It is characterized in that It includes a frame and a film winding mechanism and a buffer strip delivery mechanism arranged on the frame, the film winding mechanism includes a film winding core, a first driving element for driving the film winding core to rotate and a guide roller for guiding the film to the film winding core, the buffer strip delivery mechanism includes a roller and a second driving element for driving the roller to rotate, the circumferential surface of the roller is provided with a receiving groove for transferring the buffer strip to the surface of the film, the receiving groove extends along the axial direction of the roller, the receiving groove is provided with a first suction hole for sucking the buffer strip, and the first suction hole is connected to a vacuum pump through a suction pipe.

2. A film winding device according to claim 1, It is characterized in that The buffer strip has a bottom plane and an arc surface, and the shape of the accommodating groove corresponds to the arc surface. When the buffer strip is placed, the bottom plane of the buffer strip fits with the surface of the film material.

3. A film winding device according to claim 1, It is characterized in that The buffer strip delivery mechanism also includes a film removal mechanism for removing the packaging film on the bottom plane of the buffer strip. The film removal mechanism is arranged on one side of the drum. The film removal mechanism includes a film removal plate and a film removal driving element for controlling the movement of the film removal plate. The film removal plate is provided with a second suction hole for sucking the packaging film.

4. A film winding device according to claim 1, It is characterized in that The buffer bar delivery mechanism also includes a buffer bar loading mechanism for delivering the buffer bar into the accommodating groove.

5. A film winding device according to claim 1 or 4, It is characterized in that The buffer strip is a silicone strip.

6. A film winding device according to claim 1, It is characterized in that The buffer strip has a width of 5-50 mm and a height of 1-30 mm.

7. A film material winding process, It is characterized in that The film material winding process adopts the film material winding device according to claim 1, and the film material winding process comprises the following steps: Step 1: Rolling up the film material, rolling the film material onto the film material roll core to obtain a film material roll; Step 2: Place the buffer strip. When the film is rolled to a certain length, place the buffer strip with the same length direction as the width direction of the film on the surface of the film, so that the buffer strip is rolled up with the film and distributed circumferentially on the outer surface of the film roll. Step 3: Continue to roll up the film material so that the film material continues to roll up a certain length on the outer surface of the buffer strip; Step 4: Repeat steps 2 and 3 until the roll diameter of the film material reaches the winding requirement.

8. A film material winding process according to claim 7, It is characterized in that In step 2, when the length of the film coil reaches 500-1000m, the buffer strip is placed.

9. A film winding process according to claim 8, It is characterized in that The buffer strip is a silicone strip.

10. A film winding process according to claim 7 or 9, It is characterized in that The buffer strip has a width of 5-50 mm and a height of 1-30 mm.

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