CN219620597U - An anti-rolling film core, roll and film production device - Google Patents

Abstract

The utility model discloses an anti-film warping winding core, winding roller and film production device, comprising a cylindrical body for winding the film, the cylindrical body includes a winding straight section, and A radially constricted segment at both ends of the segment, the outer diameter of the radially constricted segment near the first end of the coiled straight segment is not greater than the outer diameter of the coiled straight segment, and the outer diameter of the second end is smaller than the outer diameter of the coiled straight segment Around the outside diameter of the straight segment. The outer diameter of the second end of the radial shrinkage section of the new type is smaller than the radius of the winding straight section, and the difference is not less than 1mm, which can provide tension deformation space for the edge of the film. Compared with the prior art, the present application's The radial shrinkage section is not in contact with the film, that is, the edge of the film is suspended, and then the tension of the film itself can be fully used to form a radial shrinkage trend at the edge of the film, thereby overcoming or reducing the warping of the film edge and ensuring the quality of the film roll. , improve the flatness and quality of the film as a whole.

Description

An anti-rolling film core, roll and film production device

technical field

The utility model relates to the technical field of conductive film production, in particular to an anti-film curling core, a roll and a film production device.

Background technique

Conductive metal thin films are a class of materials with various good properties, and have been widely used in batteries as positive current collectors or negative current collectors.

After the production of the conductive metal film is completed, it will be wound into a roll, and then the subsequent cutting and other processes will be carried out. During the process of winding into a roll, the edge of the conductive metal film will often have a local bulge, which is also called warping; this kind of warping It will affect the flatness and quality consistency of the entire guiding metal film, especially the highly warped edge will also affect the product performance of the conductive metal film.

At present, the main countermeasure in the industry is to measure the warping area. If the warping value exceeds the requirement, it will be cut off, and the cut part of the conductive metal film will be discarded as a non-conforming product, which undoubtedly causes waste and increases production costs. , how to effectively deal with the problem of edge warping of conductive metal films is a problem that needs to be solved urgently in the industry.

Contents of the invention

In order to solve the problem that the edge of the conductive metal film often has local bulges during the process of winding the conductive metal film into a roll, it is also called edge warping, which will affect the smoothness and quality consistency of the entire guiding metal film. The utility model provides an anti-film edge warping winding core, winding roller and film production device.

The technical scheme of the utility model is as follows:

An anti-film curling core, comprising a cylindrical body for winding a film, the cylindrical body includes a winding straight section, and radial shrinkage sections at both ends of the winding straight section, the diameter The outer diameter of the first end of the contracting section close to the winding straight section is not larger than the outer diameter of the winding straight section, and the outer diameter of the second end is smaller than the outer diameter of the winding straight section.

In the aforementioned winding core for preventing film curling, the radially contracted section is in the shape of a straight cylinder, and the outer diameter of the radially contracted section is smaller than the outer diameter of the winding straight section.

In the aforementioned anti-film curling core, the radial contraction section is tapered, the outer diameter of the first end of the radial contraction section is equal to the outer diameter of the winding straight section, and the radial contraction section The outer diameter of the second end is smaller than the outer diameter of the coiled straight section.

Further, the difference between the radius of the first end of the radial contraction section and the radius of the second end is 1/5 to 3/5 of the wall thickness of the cylindrical body, and the length of the radial contraction section is 1/5 of the cylindrical body 0.8 to 2 times the wall thickness.

Further, the difference between the radius of the first end of the radial contraction section and the radius of the second end is 1/2 of the wall thickness of the cylindrical body.

Further, the winding straight section is integrally formed with the radial contraction section.

Further, the winding straight section and the radial contraction section are formed by turning or milling.

Further, the winding straight section is detachably connected to the radial contraction section.

In the aforementioned anti-film curling core, the winding straight section is connected to the radial contraction section by plugging, the first end of the radial contraction section is provided with a plug, and the winding straight section is connected with the radial contraction section. One end of the radially contracted section is provided with an insertion hole engaged with the plug.

Further, the plug is provided with a magnetic seat, and the socket is provided with a magnetic head magnetically connected to the magnetic seat.

Further, the cylindrical body is made of non-metallic material.

In the aforementioned anti-film curling core, the length of the cylindrical body is 300 mm to 2000 mm.

An anti-film warping rolling roll comprises the above-mentioned anti-film warping core.

A film production device for preventing film warping, comprising the above-mentioned anti-film warping core or the above-mentioned anti-film warping roll.

According to the utility model of above-mentioned scheme, its beneficial effect is:

1. In the utility model, the outer diameter of the second end of the radial contraction section is smaller than the radius of the winding straight section, and the difference is not less than 1 mm, which can provide tension deformation space for the edge of the film. Compared with the prior art, this utility model has The applied radial shrinkage section is not in contact with the film, that is, the edge of the film is suspended in the air, and can make full use of the tension of the film itself to form a radial shrinkage trend at the edge of the film, thereby overcoming or alleviating the warping of the film edge and ensuring that the film becomes stable. Improve the roll quality and improve the overall flatness and quality of the film;

2. In the utility model, the winding straight section can be set as a tapered section or a stepped shaft section, both of which are for the purpose of forming a diameter change or drop in the radial contraction section and the winding straight section. Both shapes can improve the warping problem. And it is easy to process and manufacture, and can be prepared by injection molding or machining;

3. In the utility model, the wall thickness of the cylindrical body is used as a reference to set the relevant parameters of the taper, which not only ensures the structural strength of the overall structure, but also facilitates processing and manufacturing.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the practical For some novel embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1 is the front structural representation of embodiment 1 in the utility model;

Fig. 2 is the internal structure schematic diagram of embodiment 1 in the utility model;

Fig. 3 is the internal structure schematic diagram of embodiment 2 in the utility model;

Fig. 4 is the internal structure schematic diagram of embodiment 3 in the utility model;

Figure 5 is an enlarged view of the structure at A in Figure 2;

FIG. 6 is an enlarged view of the structure at B in FIG. 2 .

Among them, the reference signs in the figure: 100, cylindrical body; 1, winding straight section; 101, socket; 2, radial contraction section; 201, plug; 3, magnetic seat; 4, magnetic head.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

It should be noted that when a component is referred to as “fixing” or “setting” or “connecting” another component, it may be directly or indirectly located on the other component. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. The indicated orientation or position is based on the orientation or position shown in the drawings, and is only for convenience of description, and should not be understood as a limitation on the technical solution. The terms "first", "second" and so on are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of technical features. "Multiple" means two or more, unless otherwise specifically defined. "Several" means one or more than one, unless otherwise clearly and specifically defined.

Example 1

As shown in Fig. 1, Fig. 2, Fig. 5 and Fig. 6, an anti-film curling core described in an example of the present invention includes a cylindrical body 100 for winding a film, and the cylindrical body 100 includes The winding straight section 1, and the radial shrinkage section 2 at both ends of the winding straight section 1, the outer diameter of the radially shrinking section 2 near the first end of the winding straight section 1 is not larger than the outer diameter of the winding straight section 1 , the outer diameter of the second end is smaller than the outer diameter of the winding straight section 1, and the inner diameter of the radially contracted section 2 is optimally not smaller than the inner diameter of the winding straight section 1.

When this example is in use, the winding core is fixedly installed on the conductive metal film roll, that is, the cylindrical body 100 is fixed on the conductive metal film roll, and the conductive film can be wound onto the cylindrical body 100 by rotating the roll. The middle section of the cylindrical body 100 is a winding straight section 1, and the outer diameter of this section is the same, so that the conductive film can be wound up smoothly in the middle of the width direction, and since the two ends of the cylindrical body 100 are radial shrinkage sections 2, the cylindrical The outer diameters of both ends of the main body 100 are smaller than the outer diameter of the middle section. When winding, the edge of the conductive film is suspended, and then fully utilizes the tension of the conductive film itself to form a tendency to collapse or gather toward the winding core at the edge of the conductive film, that is When winding, the edge of the conductive film is radially shrunk, so as to overcome or reduce the edge warping of the conductive film, ensure the roll quality of the conductive film, and improve the overall flatness and quality of the conductive film.

In this example, by setting the radial contraction section 2 at both ends of the cylindrical body 100, the edge of the conductive film is suspended in the air when it is wound, and the edge shrinks radially under the action of the tension of the conductive film, which improves the edge warping of the conductive film when it is wound. To ensure the roll quality of the conductive film and reduce the bad loss.

In the practical application of the utility model, the outer diameter of the radial contraction section 2 is fixed, and can also be changed from time to time, specifically, it can be an inflatable variable diameter, a mechanical variable diameter, an elastic variable diameter, etc.

As shown in Figure 5, in a preferred example, the radial contraction section 2 is tapered, the outer diameter of the first end of the radial contraction section 2 is equal to the outer diameter of the winding straight section 1, and the outer diameter of the second end of the radial contraction section 2 is The outer diameter is smaller than the outer diameter of the winding straight section 1 . The difference D1 between the radius of the first end of the radial contraction section 2 and the radius of the second end is 1/5 to 3/5 of the wall thickness of the cylindrical body 100, preferably, the radius of the first end of the radial contraction section 2 and the radius of the second end The difference D1 is 1/2 of the wall thickness of the cylindrical body 100, the difference D1 between the radius of the first end of the radial contraction section 2 and the radius of the second end is generally not less than 1mm, and the length D2 of the radial contraction section 2 is the cylindrical body 100 0.8 to 2 times the wall thickness, such as 0.8 times, 1 times, 1.5 times, etc. Setting the radial contraction section 2 in a tapered shape is because the tapered shape is a regular structure, which is convenient for processing and manufacturing. Wherein, the radial contraction section 2 at both ends of the winding straight section 1 is not mandatory to be symmetrical, and the symmetrical radial contraction section 2 has a better winding effect and is easier to process. In addition, the wall thickness of the cylindrical body 100 is used as a reference to set parameters related to the taper, which not only ensures the structural strength of the overall structure, but also facilitates manufacturing.

As shown in Figure 6, in a preferred example, the winding straight section 1 is plugged in with the radially contracting section 2, and the first end of the radially contracting section 2 is provided with a plug 201, and the winding straight section 1 is connected to the radial One end of the constricted section 2 is provided with an insertion hole 101 engaging with a plug 201 . The plug 201 is provided with a magnetic base 3 , and the socket 101 is provided with a magnetic head 4 magnetically connected to the magnetic base 3 . When connecting the winding straight section 1 and the radial contraction section 2, insert the plug 201 into the jack 101, at this time the magnetic suction seat 3 and the magnetic suction head 4 are magnetically engaged, so that the winding straight section 1 and the radial contraction section 2 connections. When separating, the plug 201 is pulled out from the socket 101, and the magnetic base 3 and the magnetic head 4 are separated at this time, and the winding straight section 1 and the radial contraction section 2 are disconnected at this time. Therefore, it is convenient to disassemble and assemble the radial shrinkage section 2 and the winding straight section 1, and it is convenient to replace the two parts, so as to adapt to different widths and different types of conductive film winding. The length of the entire cylindrical body 100 is generally 300mm to 2000mm, and the length of the cylindrical body 100 can be any value within the range of 300mm, 500mm, 1000mm, 1050mm, 1075mm, 1100mm, 1500mm, 2000mm, etc. Wide conductive film, this kind of wide conductive film is applicable to a wide range of scenarios and has high processing efficiency.

In the practical application of the utility model, the winding straight section 1 and the radial contraction section 2 are detachably connected. In addition to the above-mentioned connection method, threaded connection can be used, such as at the connection ends of the winding straight section 1 and the radial contraction section 2 respectively. Internal and external threads that cooperate with each other are provided to connect the two. Or use fasteners for connection, such as using screws to connect the winding straight section 1 and the radial contraction section 2 . The detachable connection between the winding straight section 1 and the radial contraction section 2 includes but is not limited to the above-mentioned connection methods, which are not exhaustive here.

In a preferred example, the cylindrical body 100 is made of non-metallic material, such as paper, resin, plastic, etc., which is light in weight, high in structural strength, and easy to manufacture and use.

Example 2

As shown in FIG. 3 , the difference from Embodiment 1 is that the radially contracted section 2 is straight cylindrical, and the outer diameter of the radially contracted section 2 is smaller than the outer diameter of the winding straight section 1 . The difference in outer diameter between the straight cylindrical radial contraction section 2 and the winding straight section 1 forms a step, and the drop between the two makes the edge of the conductive film in a suspended state, so that the edge of the conductive film can be rolled up. Certain radial shrinkage can avoid or reduce warping and ensure the flatness and quality of film rolls.

When the utility model is actually applied, the shape of the radial contraction section 2 includes but is not limited to the shapes listed in Embodiment 1 and Embodiment 2. As long as the conductive film is rolled up, the edge can have a certain radial contraction space. Yes, the edge warping can be improved, so that the overall flatness of the film roll can be guaranteed. The shape listed in Example 1 and Example 2 is a preferred shape, which has better effect and is easy to process.

Example 3

As shown in FIG. 4 , the difference from Embodiment 1 is that the winding straight section 1 and the radial contraction section 2 are integrally formed. The winding straight section 1 and the radial contraction section 2 are formed by injection molding or machining, and the machining includes turning or milling. The integrally formed winding straight section 1 and radial contraction section 2 have good integrity, good structural strength, and are convenient for manufacturing and processing.

Example 4

An anti-film curling roller described in an example of the utility model includes the above-mentioned anti-film curling core for winding the film. The winding roller in this example can ensure the flatness of the film roll by using the above-mentioned winding core.

Example 5

The film production device for preventing film warping described in an example of the utility model includes the above-mentioned anti-film warping core or the above-mentioned anti-film warping roller for winding the film. The film production device in this example can ensure the flatness of the film roll by using the above-mentioned winding core or roll.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. An anti-film curling core, characterized in that it includes a cylindrical body for winding the film, the cylindrical body includes a winding straight section, and a radial direction at both ends of the winding straight section A contraction section, the outer diameter of the first end of the radial contraction section near the winding straight section is not greater than the outer diameter of the winding straight section, and the outer diameter of the second end is smaller than the outer diameter of the winding straight section . 2. An anti-film curling core according to claim 1, characterized in that, the radial contraction section is straight cylindrical, and the outer diameter of the radial contraction section is smaller than that of the winding straight section. outside diameter. 3. An anti-film curling core according to claim 1, characterized in that, the radial contraction section is tapered, and the outer diameter of the first end of the radial contraction section is equal to the winding The outer diameter of the straight section, the outer diameter of the second end of the radial contraction section is smaller than the outer diameter of the coiled straight section. 4. The anti-film curling core according to claim 3, characterized in that, the difference between the radius of the first end of the radial contraction section and the radius of the second end is 1% of the wall thickness of the cylindrical body. /5 to 3/5, the length of the radial contraction section is 0.8 to 2 times the wall thickness of the cylindrical body. 5 . The anti-film curling core according to claim 1 , wherein the winding straight section and the radial contraction section are integrally formed. 6 . 6 . The anti-film curling core according to claim 1 , wherein the winding straight section is detachably connected to the radial contraction section. 7 . 7. An anti-film curling core according to claim 6, characterized in that, the winding straight section is plugged and connected to the radially contracted section, and the first end of the radially contracted section A plug is provided, and an insertion hole engaged with the plug is provided at one end of the winding straight section and the radial contraction section. 8 . The anti-film curling core according to claim 1 , wherein the length of the cylindrical body is 300 mm to 2000 mm. 9. An anti-film warping roll, characterized in that it comprises the anti-film warping core according to any one of claims 1-8. 10. A film production device for preventing film warping, characterized in that it comprises an anti-film warping core according to any one of claims 1-8 or an anti-film warping core according to claim 9. Edge roll.