Hot rolling device

Abstract

The utility model relates to a hot rolling device which comprises a hot pressing assembly, and the hot pressing assembly comprises an upper pressing roller and a lower pressing roller which are used for rolling a material layer and a heating piece used for heating the material layer to be rolled and the pressing rollers. The heating pieces are arranged on the upstream and downstream of the upper and lower pressing rollers in the conveying direction of the material layer, heat reflecting surfaces are further formed on the sides, away from the conveying direction and the pressing rollers, of the heating pieces, the heat reflecting surfaces are used for reflecting heat emitted by the heating pieces, and the heating pieces are separated from the pressing rollers, so that a heat source is separated; the heat generated by the heat source is concentrated in the space where the material layer conveying path near the compression roller is located, so that the heating uniformity of the material layer is improved while the heating effect on the material layer is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of roller pressing, specifically, it relates to a hot roller pressing device. Background Technology

[0002] Roll forming is a crucial step in electrode fabrication. By controlling the electrode thickness and compaction density, battery quality can be effectively controlled. However, some electrodes that meet the thickness requirements after roll forming may experience thickness increases during the slitting process. Typically, hot roll forming is used in related fields to reduce this thickness increase.

[0003] For example, a roller press includes upper and lower hot press rollers with adjustable positions. During use, the thickness of the electrode sheet can be adjusted by adjusting the distance between the two hot press rollers. At the same time, the hot press rollers heat the material layer, reducing the adverse effects of moisture in the material layer on the rolling process.

[0004] However, during use, it was found that in order to improve production efficiency, the electrode sheets passed through the rollers at a relatively fast speed. The heating and pressing of the rollers relied solely on the upper and lower hot pressing rollers. The surface of the electrode sheets softened due to the heat, but there were still areas inside that were not heated or were heated unevenly. In this case, it would affect the consistency of the roller pressing thickness. In addition, the internal stress inside the electrode sheets could not be fully released. Utility Model Content

[0005] To improve the uniformity of electrode heating, further enhance the consistency of electrode roll forming thickness, fully release internal stress, and improve product quality, this utility model provides a hot rolling device. This application expands the heating area of ​​the electrode by separating the heating element from the hot pressing roller, ensuring the electrode is fully heated. Before rolling, the electrode enters the heating range of the heating element. Under the influence of heat, the internal binder of the electrode softens sufficiently, releasing internal stress and reducing deformation resistance. The preheated electrode is easier to hot-press, facilitating the production of electrodes with higher compaction density and higher thickness consistency. Thus, by expanding the heating area of ​​the electrode, the accuracy of roll forming thickness control is improved.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A hot rolling device includes a hot pressing assembly, the hot pressing assembly including upper and lower pressure rollers for rolling a material layer, and a heating element for heating the material layer to be rolled and the pressure rollers; the heating element is disposed upstream and downstream of the upper and lower pressure rollers along the material layer transport direction, and a heat reflective surface is formed on the side of the heating element away from the transport direction and the pressure rollers, the heat reflective surface being used to reflect the heat emitted by the heating element.

[0008] Preferably, it also includes a heat guiding plate, which is disposed on the side of the heating element away from the pressure roller.

[0009] Preferably, multiple heat guiding plates are provided, and the multiple heat guiding plates are connected end to end. The side of the heating element away from the transmission path and the pressure roller forms an arc-shaped heat reflective surface with the opening facing the transmission path and the pressure roller.

[0010] Preferably, the hot pressing assembly is configured as a plurality of components, which are spaced apart, and the temperature of the plurality of hot pressing assemblies is set to increase incrementally along the material layer transmission direction.

[0011] Preferably, the temperature of the heating element is adjustable.

[0012] Preferably, the hot pressing assembly further includes a blocking member for separating the adhesive roller material layer and the pressure roller, the blocking member abutting against the pressure roller.

[0013] Preferably, the hot pressing assembly further includes a scraper mounting plate, which is disposed on the side of the heating element facing the material layer conveying path, and the blocking element is disposed on the scraper mounting plate.

[0014] Preferably, the blocking member and the scraper mounting plate are detachably connected.

[0015] Preferably, it also includes a housing, and the hot pressing assembly is disposed inside the housing.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0017] By distributing heating elements along the material layer transport direction upstream and downstream of the pressure roller and separating the heating elements from the pressure roller, the heating elements heat the space where the pressure roller is located, thereby synchronously heating the pressure roller and the material layer in the space. Since the heat source is separated from the pressure roller, the degree of uneven heating of the material layer is effectively reduced, and the setting of the heat reflective surface further ensures the concentration of heat distribution and ensures the hot pressing effect of the material layer.

[0018] By placing the scraper mounting plate on the side of the heating element facing the conveying path, the scraper mounting plate limits the material layer separated from the pressure roller, effectively reducing the occurrence of the material layer falling onto the heating element. Furthermore, by placing a blocking element on the scraper mounting plate and making the blocking element abut against the pressure roller, the sticky material layer is further prevented from moving towards the heating element with the pressure roller, effectively reducing the probability of the material layer contacting the heating element, thereby improving the product yield, reducing the raw material loss rate, and improving the product rolling quality and efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a hot roller pressing device according to an embodiment of this application;

[0020] Figure 2This is a schematic diagram to highlight the hot-pressing component.

[0021] In the diagram: 1. Conveyor roller; 2. Outer shell; 3. Opening; 4. Hot pressing assembly; 41. Pressure roller; 42. Heating element; 43. Heat guide plate; 44. Scraper mounting plate; 45. Blocking element. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0026] Reference Figure 1 A hot rolling device includes multiple conveying rollers 1 for conveying a layer of material to be hot-pressed. The material layer to be rolled is conveyed along the conveying rollers 1, forming a material layer conveying path. A housing 2 is provided at intervals of the conveying rollers 1. The conveying path is provided through the housing 2, and an opening 3 is provided at the position where the conveying path intersects with the housing 2. During the rolling process, the material layer passes through the housing 2 through the opening 3.

[0027] Reference Figure 1 and Figure 2The outer casing 2 is equipped with a hot pressing assembly 4, which includes upper and lower pressure rollers 41 corresponding to both sides of the material layer conveying path. Both sides of the upper and lower pressure rollers 41 are rotatably connected to the outer casing 2. Heating elements 42 are arranged upstream and downstream of the upper and lower pressure rollers 41 on the conveying path, and the heating elements 42 are also arranged in the cavity of the outer casing 2. In order to improve the heating uniformity of the heating elements 42, at least four heating elements 42 are provided. In this embodiment, the heating elements 42 are heating tubes, and four heating tubes are provided, and the four heating tubes are symmetrically arranged with respect to the plane of the material layer conveying path and the roller shafts of the upper and lower pressure rollers 41.

[0028] Reference Figure 1 On the side of the heating element 42 away from the material layer transport path of the upper and lower pressure rollers 41, a plurality of heat guiding plates 43 connected end to end are provided. In this embodiment, the heat guiding plate 43 is a plate with an aluminum foil heat reflective layer, and there are 3 heat guiding plates 43 connected end to end to form a U-shaped heat reflective surface. The opening 3 of the reflective surface is facing the material layer transport path and the pressure rollers 41. The heat emitted by the heat source is concentrated and distributed in the space around the material layer transport path and the pressure rollers 41 under the action of the heat guiding plate 43, so as to heat the pressure rollers 41 and the material layer synchronously and effectively reduce the unevenness of heating. In other embodiments, the heat guiding plate 43 can also be set as a guide plate with a single opening 3 facing the material layer transport path and the pressure rollers 41 in an arc shape, a near-arc shape, or other shapes that can realize the reflective function.

[0029] During the hot rolling process, the upstream heating element 42 preheats the material layer, performing a first preheating. Since the pressure roller 41 is under the heating effect of the heating element 42 for a long time, the temperature of the pressure roller 41 is higher than the temperature of the material layer, thus performing a second heating on the pressure roller 41. The downstream heating element 42 further dries the moisture in the material layer and further ensures the temperature stability inside the outer shell 2, improving the uniformity of heating of the material layer.

[0030] In this embodiment, the hot pressing assembly 4 is a single unit. In other embodiments, to further improve the uneven heating between the inner and outer layers of the material layer, multiple hot pressing assemblies 4 can be provided, and the temperature of the heating element 42 within the hot pressing assembly 4 increases sequentially along the material layer conveying direction. Furthermore, to improve the practicality of the device and further control the temperature inside the outer shell 2, the heating element 42 can be electrically connected to a temperature controller, and the temperature of the heating element 42 can be adjusted by the temperature controller.

[0031] Reference Figure 2To prevent the material layer from sticking to the rollers during hot pressing and getting rolled into the location of the heating element 42, where it is overheated under the high temperature of the heating element 42, thus causing warping, a scraper mounting plate 44 is provided on the side of the heating element 42 located downstream of the upper and lower pressure rollers 41, facing the material layer conveying path. The scraper mounting plate 44 can limit the material layer after roller pressing, reduce the material layer contact with the heating element 42 and warping, thus reducing the loss and improving the material utilization rate and product quality.

[0032] Reference Figure 2 A blocking element 45 is detachably provided on the scraper mounting plate 44 via a threaded connection. In this embodiment, in order to reduce the impact of the blocking element 45 on the roller-pressed material layer, the blocking element 45 is a high-temperature resistant silicone plate. In other embodiments, depending on the composition of the roller-pressed material layer, the blocking element 45 can also be a scraper made of metal, ceramic, or other materials. The side of the high-temperature silicone plate away from the scraper mounting plate 44 abuts against the outer surface of the pressure roller 41. The material layer that is adhered to the pressure roller 41 is separated from the pressure roller 41 under the action of the blocking element 45, effectively reducing the occurrence of the material layer being rolled into the position of the heating element 42 along with the pressure roller 41.

[0033] The principle of this embodiment is that the material layer on the transmission path passes through the outer shell 2 through the opening 3. Since the heat source and the pressure roller 41 are set separately, the contact area between the material and the heat source is effectively increased, and the uneven heating of the material layer is improved. In addition, the scraper mounting plate 44 and the blocking member 45 limit the material layer after roller pressing and sticking to the roller, effectively reducing the occurrence of overheating and warping loss due to contact between the material layer and the heating member 42, thereby improving the utilization rate of raw materials and product quality.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A hot roll press apparatus, characterized by, The hot pressing assembly (4) comprises upper and lower pressing rollers (41) for rolling the material layer, a heating member (42) for heating the material layer to be rolled and the pressing roller (41); the heating member (42) is arranged upstream and downstream of the upper and lower pressing rollers (41) along the material layer transmission direction, and a heat reflecting surface is further formed on the side of the heating member (42) away from the transmission direction and the pressing roller (41), the heat reflecting surface is used for reflecting the heat emitted by the heating member (42).

2. The hot roll press apparatus according to claim 1, wherein A heat guide plate (43) is further arranged on the side of the heating member (42) away from the transmission path and the pressing roller (41).

3. The hot roll press apparatus of claim 2, wherein The heat guide plates (43) are arranged in multiple, the heat guide plates (43) are connected in head-to-tail mode, and the side of the heating member (42) away from the transmission path and the pressing roller (41) forms a U-shaped heat reflecting surface facing the transmission path and the pressing roller (41).

4. The hot roll press apparatus according to any one of claims 1 to 3, characterized by The hot pressing assembly (4) is arranged in multiple, the hot pressing assemblies (4) are arranged at intervals, and the temperatures of the hot pressing assemblies (4) are arranged in an increasing mode along the material layer transmission direction.

5. The hot roll press apparatus according to claim 4, wherein The temperature of the heating member (42) is adjustable.

6. The hot roll press apparatus according to any one of claims 1 to 3, wherein The hot pressing assembly (4) further comprises a blocking member (45) for separating the material layer and the pressing roller (41), and the blocking member (45) is in abutment with the pressing roller (41).

7. The hot roll press apparatus according to claim 6, wherein The hot pressing assembly (4) further comprises a scraper mounting plate (44), the scraper mounting plate (44) is arranged on the side of the heating member (42) facing the material layer transmission path, and the blocking member (45) is arranged on the scraper mounting plate (44).

8. The hot roll press apparatus of claim 7, wherein The blocking member (45) and the scraper mounting plate (44) are detachably connected.

9. The hot roll apparatus of claim 1, wherein, An outer shell (2) is further provided, and the hot pressing assembly (4) is arranged in the outer shell (2).

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