Base membrane supporting structure and drying oven

Abstract

The utility model discloses a base membrane supporting structure and a drying oven. The base membrane supporting structure comprises an upper drying nozzle, a lower drying nozzle and supporting rollers, a lower air outlet is formed in the bottom of the upper drying nozzle; an upper air outlet is formed in the top of the lower drying nozzle; the lower air outlet and the air outlet are oppositely arranged and jointly discharge air to dry a base film located between the upper drying nozzle and the lower drying nozzle; the supporting roller is rotationally arranged at the top of the lower drying nozzle; the supporting roller is used for supporting a base film part which may droop; therefore, the base film can be prevented from partially drooping to be in contact with the lower air outlet, and the base film is prevented from being scratched and damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing devices, in particular to a base film support structure and an oven. Background Art

[0002] In the production of lithium battery base membranes, in order to promote the uniform distribution of micropore size inside the base membrane, improve the performance of the base membrane, prepare thinner products, and increase production output, the base membrane will be stretched in the longitudinal and transverse directions. The equipment for stretching the base membrane in the transverse direction is called a transverse stretching machine (abbreviated as transverse stretching machine). The transverse stretching of the base membrane is often completed slowly through multiple gradients of different widths, and each gradient is completed by the cooperation of the track and amplitude modulation mechanism.

[0003] During the initial stretching of the base film, the thicker base film material before horizontal stretching begins will sag in the middle due to its own weight during the initial heating and pre-stretching process. The higher the fluidity of the solidified base film, the more severe the sagging in the middle of the base film. This can lead to the base film drooping between the air outlet and the air outlet, which can easily cause scratches and damage. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a base film supporting structure and an oven with the function of supporting a base film.

[0005] The first technical solution adopted by the utility model to solve its technical problem is:

[0006] A base film support structure comprises an upper drying nozzle, a lower drying nozzle and a support roller;

[0007] The bottom of the upper drying nozzle is provided with a lower air outlet;

[0008] The top of the lower drying nozzle is provided with an upper air outlet;

[0009] The lower air outlet is arranged opposite to the upper air outlet, and they jointly discharge air to dry the base film between the upper drying nozzle and the lower drying nozzle;

[0010] The supporting roller is rotatably arranged on the top of the lower drying nozzle.

[0011] In the base film supporting structure as described above, the supporting roller is arranged in the middle of the lower drying nozzle.

[0012] As described above, the base film support structure has a first mounting seat and a second mounting seat fixedly provided on the lower drying nozzle. One end of the support roller is rotatably connected to the first mounting seat, and the other end of the support roller is rotatably connected to the second mounting seat.

[0013] As described above, the base film support structure has a first film stretching space and a second film stretching space provided between the upper drying nozzle and the lower drying nozzle; along the axial direction of the support roller, the first film stretching space is provided at one end of the support roller, and the second film stretching space is provided at the other end of the support roller.

[0014] The base film supporting structure as described above further comprises a first drying nozzle fixing member, a second drying nozzle fixing member, a third drying nozzle fixing member and a drying nozzle connecting member;

[0015] The first drying nozzle fixing member is hinged to the left end of the upper drying nozzle, and the third drying nozzle fixing member is connected to the right end of the upper drying nozzle;

[0016] The second drying nozzle fixing piece is hinged to the left end of the lower drying nozzle;

[0017] The first drying nozzle fixing member and the second drying nozzle fixing member are fixed in relative positions;

[0018] One end of the drying nozzle connecting piece is arranged at the right end of the upper drying nozzle, and the other end of the drying nozzle connecting piece is arranged at the right end of the lower drying nozzle. The drying nozzle connecting piece is used to fix the relative positions of the right ends of the upper drying nozzle and the lower drying nozzle.

[0019] The base film supporting structure as described above, wherein the third drying nozzle fixing member is connected to the right end of the lower drying nozzle, and the third drying nozzle fixing member includes a fixed pulley and a movable belt sliding on the fixed pulley;

[0020] The fixed pulley is arranged above the upper drying nozzle; one end of the movable belt is detachable from the right end of the upper drying nozzle, and the other end of the movable belt is detachable from the right end of the lower drying nozzle.

[0021] The base film support structure as described above, further, the drying nozzle connecting piece includes a hook, a first locking rod, a second locking rod, a first pin shaft, a second pin shaft, a first handle, a second handle, a connecting rod and a buckle seat;

[0022] The hook is provided at the right end of the upper drying nozzle, and the bent body of the hook is bent toward the upper side of the upper drying nozzle;

[0023] The connecting rod is hinged to the right end of the lower drying nozzle, and the buckle seat is provided at the end of the connecting rod away from the lower drying nozzle;

[0024] One end of the first handle is hinged to the buckle seat through the first pin; the other end of the first handle rotates around the first pin as a rotation axis;

[0025] One end of the second handle is hinged to the buckle seat through the second pin; the other end of the second handle rotates around the second pin as a rotation axis;

[0026] The first pin shaft and the second pin shaft are parallel to each other, and the second pin shaft is arranged on a side of the first pin shaft close to the lower drying nozzle;

[0027] The first locking rod includes a first locking rod that cooperates with the hook;

[0028] The second locking rod includes a second locking rod that cooperates with the hook;

[0029] Rotating the first handle with the first pin as the rotation axis to lock the first locking rod into the hook;

[0030] The second handle is rotated with the second pin shaft as the rotation axis to lock the second locking rod in the hook, thereby fixing the relative positions of the upper drying nozzle and the lower drying nozzle.

[0031] The base film support structure as described above, the upper drying nozzle is provided with an upper drying nozzle air inlet on one side, and the upper drying nozzle is provided with an upper air mixing chamber;

[0032] A lower drying nozzle air inlet is provided on one side of the lower drying nozzle, and a lower air mixing chamber is provided in the lower drying nozzle;

[0033] The cross section of the upper air mixing chamber decreases from one side to the other side of the upper drying nozzle air inlet;

[0034] The cross section of the lower air mixing cavity decreases gradually from one side to the other side of the lower drying nozzle air inlet.

[0035] The second technical solution adopted by the present invention to solve its technical problem is:

[0036] An oven comprises the base film support structure as described above, wherein each base film support structure is arranged parallel to each other.

[0037] In the oven as described above, on one side of the oven, the left ends of the base film support structures and the right ends of the base film support structures are alternately arranged.

[0038] The beneficial effects of the utility model are:

[0039] The lower air outlet of the upper drying nozzle and the upper air outlet at the top of the lower drying nozzle are arranged opposite to each other to jointly dry the base film located between the upper drying nozzle and the lower drying nozzle, and the support roller is arranged at the top of the lower drying nozzle to support the base film portion that may sag; thereby, the base film portion is prevented from sagging and contacting the lower air outlet, thereby preventing the base film from being scratched and damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] Figure 1This is one of the schematic diagrams of the three-dimensional structure of the base membrane support structure in the embodiment;

[0042] Figure 2 1 is a schematic diagram of the three-dimensional structure of the support roller, the first mounting seat and the second mounting seat in the embodiment;

[0043] Figure 3 This is the second schematic diagram of the three-dimensional structure of the base membrane support structure in the embodiment;

[0044] Figure 4 yes Figure 1 A magnified view of the structure of the middle part A;

[0045] Figure 5 Schematic diagram of the state of the drying nozzle connecting piece in the embodiment;

[0046] Figure 6 1 is a front view of the drying nozzle connector in the embodiment (the first locking rod and the second locking rod are omitted);

[0047] Figure 7 Schematic diagram of the arrangement of the base film support structure in the oven in this embodiment;

[0048] The reference numerals are as follows:

[0049] 1-upper drying nozzle; 11-upper drying nozzle air inlet; 12-upper air mixing chamber; 2-lower drying nozzle; 21-lower drying nozzle air inlet; 3-support roller; 23-upper air outlet; 231-first film-stretching space; 232-second film-stretching space; 41-first mounting seat; 42-second mounting seat; 5-first drying nozzle fixing member; 6-second drying nozzle fixing member; 7-third drying nozzle fixing member; 71-fixed pulley; 8-drying nozzle connecting member; 81-hook; 821-first locking rod; 822-second locking rod; 831-first pin; 832-second pin; 841-first handle; 842-second handle; 85-connecting rod; 86-hook seat; 100-base film supporting structure. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the present invention can be combined interactively without conflicting with each other.

[0051] In the traditional film stretching process, the gripper of the transverse stretching machine clamps the edge of the base film and applies reverse tension to stretch the base film. Since the center of the base film is not subjected to direct tension, the tension in the central area is smaller than that at the edge, resulting in sagging in the center. Especially for lithium batteries used in the manufacture of new energy vehicles, due to the large volume of automotive lithium batteries, the corresponding base film width is also larger and the base film mass is also greater. During the stretching process, the base film is more likely to sag and the sagging depth is also greater.

[0052] Reference Figure 1 、 Figure 2 , this embodiment provides a base film support structure, including an upper drying nozzle 1, a lower drying nozzle 2 and a support roller 3;

[0053] The bottom of the upper drying nozzle 1 is provided with a lower air outlet (not shown in the figure);

[0054] The top of the lower drying nozzle 2 is provided with an upper air outlet 23;

[0055] The lower air outlet is arranged opposite to the upper air outlet 23, and the lower air outlet and the upper air outlet 23 jointly discharge air to dry the base film located between the upper drying nozzle 1 and the lower drying nozzle 2;

[0056] The support roller 3 is rotatably arranged on the top of the lower drying nozzle 2 .

[0057] Before stretching, the base film has not been heated and may still have a certain fluidity when it is not dried. The fluid base film is more likely to accumulate in the central area of ​​the base film. In this embodiment, a support roller 3 is provided to support the part of the base film that may sag; thereby, the base film can be prevented from partially sagging and contacting the upper air outlet 23, thereby preventing the base film from being scratched and damaged.

[0058] In one embodiment, there are multiple support rollers 3 and the rotation direction of the support rollers 3 is consistent with the transmission direction of the base film.

[0059] In one embodiment, the support roller 3 is disposed in the middle of the lower drying nozzle 2. When the sides of the base film are subjected to uniform tension, the base film is most likely to sag at its center. Therefore, the support roller 3 is disposed in the middle of the lower drying nozzle 2 to support the lowest point of the base film sagging and provide stable support for the middle of the base film.

[0060] Reference Figure 2In one embodiment, a first mounting seat 41 and a second mounting seat 42 are fixedly provided on the lower drying nozzle 2. One end of the support roller 3 is rotatably connected to the first mounting seat 41, and the other end of the support roller 3 is rotatably connected to the second mounting seat 42. The first mounting seat 41 and the second mounting seat 42 secure the position of the support roller 3 on the lower drying nozzle 2, thereby preventing the support roller 3 from shaking or shifting when the lower drying nozzle 2 is discharging air, thereby affecting the support of the base film.

[0061] Reference Figure 1 In one embodiment, a first film stretching space 231 and a second film stretching space 232 are provided between the upper drying nozzle 1 and the lower drying nozzle 2; along the axial direction of the support roller 3, the first film stretching space 231 is provided at one end of the support roller 3, and the second film stretching space 232 is provided at the other end of the support roller 3; the film stretching clamp of the transverse stretching machine can simultaneously extend into the first film stretching space 231 and the second film stretching space 232 respectively, stretching the base film located between the lower air outlet and the upper air outlet, thereby promoting a uniform distribution of micropore size inside the base film and improving the performance of the base film.

[0062] In one embodiment, the first drying nozzle fixing member 5, the second drying nozzle fixing member 6, the third drying nozzle fixing member 7 and the drying nozzle connecting member 8 are also included;

[0063] The first drying nozzle fixing member 5 is hinged to the left end of the upper drying nozzle 1, and the third drying nozzle fixing member 7 is connected to the right end of the upper drying nozzle 1;

[0064] The second drying nozzle fixing member 6 is hinged to the left end of the lower drying nozzle 2;

[0065] The first drying nozzle fixing member 5 and the second drying nozzle fixing member 6 are fixed in relative positions;

[0066] One end of the drying nozzle connecting member 8 is provided at the right end of the upper drying nozzle 1, and the other end of the drying nozzle connecting member 8 is provided at the right end of the lower drying nozzle 2. Under the action of the gravity of the lower drying nozzle 2, the drying nozzle connecting member 8 is kept taut by the lower drying nozzle 2, thereby fixing the relative positions of the right ends of the upper drying nozzle 1 and the lower drying nozzle 2.

[0067] When the lower air outlet or the upper air outlet 23 needs to be cleaned, the nozzle connector 8 is removed, and the upper nozzle 1 is rotated upward using the hinge axis between it and the first nozzle fixing member 5 as the rotation axis. The lower nozzle 2 is rotated downward using the hinge axis between it and the second nozzle fixing member 6 as the rotation axis. The space between the upper nozzle 1 and the lower nozzle 2 becomes larger, making it easier for the operator to clean the lower air outlet, the support roller 3, and the upper air outlet 23.

[0068] Furthermore, the first drying nozzle fixing member 5 and the third drying nozzle fixing member 7 are both provided in two groups, and are both provided along the width direction of the upper drying nozzle 1;

[0069] The second drying nozzle fixing members 6 are also in two groups and are arranged along the width direction of the lower drying nozzle 2;

[0070] The drying nozzle connecting member 8 is provided between the two third drying nozzle fixing members 7 .

[0071] Reference Figure 1 Furthermore, a third drying nozzle fixing member 7 is connected to the right end of the lower drying nozzle 2, and the third drying nozzle fixing member 7 includes a fixed pulley 71 and a movable belt (not shown in the figure) sliding on the fixed pulley 71;

[0072] The fixed pulley 71 is provided above the upper drying nozzle 1 ; one end of the movable belt is detachable from the right end of the upper drying nozzle 1 , and the other end of the movable belt is detachable from the right end of the lower drying nozzle 2 .

[0073] The upper drying nozzle 1 and the lower drying nozzle 2 are connected by a fixed pulley assembly consisting of a fixed pulley 71 and a movable belt. This facilitates synchronous adjustment of the height of the right ends of the upper drying nozzle 1 and the lower drying nozzle 2. Furthermore, when the upper air outlet 23 is to be cleaned, the movable belt is flexible. When the upper drying nozzle 1 is turned over, the movable belt bends to make way for the right end of the upper drying nozzle 1. Even if the connecting belt does not contact the upper drying nozzle 1, it will not hinder the turning over of the upper drying nozzle 1, thus making the operation quick and convenient.

[0074] Reference Figure 4-Figure 6 Furthermore, the drying nozzle connecting member 8 includes a hook 81, a first locking rod 821, a second locking rod 822, a first pin 831, a second pin 832, a first handle 841, a second handle 842, a connecting rod 85 and a buckle seat 86;

[0075] The hook 81 is provided at the right end of the upper drying nozzle 1 and the bent body of the hook 81 is bent toward the upper side of the upper drying nozzle 1;

[0076] The connecting rod 85 is hinged to the right end of the lower drying nozzle 2, and the end of the connecting rod 85 away from the lower drying nozzle 2 is provided with the buckle seat 86;

[0077] One end of the first handle 841 is hinged to the buckle seat 86 via the first pin 831 ; the other end of the first handle 841 rotates around the first pin 831 ;

[0078] One end of the second handle 842 is hinged to the buckle seat 86 via the second pin 832; the other end of the second handle 842 rotates around the second pin 832;

[0079] The first pin shaft 831 and the second pin shaft 832 are parallel to each other, and the second pin shaft 832 is located on a side of the first pin shaft 831 close to the lower drying nozzle 2;

[0080] The first locking rod 821 includes a first locking rod 823 that cooperates with the hook 81;

[0081] The second locking rod 822 includes a second locking rod 824 that cooperates with the hook 81;

[0082] Rotate the first handle 841 with the first pin 831 as the rotation axis to lock the first locking rod 821 into the hook 81;

[0083] The second handle 842 is rotated about the second pin 832 to lock the second locking rod 822 in the hook 81. The second handle 842 is then rotated in the opposite direction to fix the relative positions of the upper drying nozzle 1 and the lower drying nozzle 2. This solution is equivalent to the integration of two buckles, so that the pulling force applied by the lower drying nozzle 2 to the upper drying nozzle is as vertical as possible, thereby minimizing the bending stress on the upper drying nozzle 1 and preventing damage to the upper drying nozzle 1.

[0084] Since hot air enters the lower drying nozzle 2 from the lower drying nozzle air inlet 21 and is blown out along the lower air outlet, and the lower drying nozzle air inlet 21 and the lower air outlet are located on mutually perpendicular planes, the longer the upper drying nozzle 2 is, the smaller the air volume and the lower the temperature of the air discharged at the end farthest from the lower air outlet are, which results in uneven heating of the base film and different performances of different parts of a base film.

[0085] In order to solve the above problem, in any of the above embodiments, an upper drying nozzle air inlet 11 is provided on one side of the upper drying nozzle 1, and an upper air mixing chamber (not shown in the figure) is provided inside the upper drying nozzle 1;

[0086] A lower drying nozzle air inlet 21 is provided on one side of the lower drying nozzle 2, and an upper air mixing chamber (not shown in the figure) is provided inside the lower drying nozzle 2;

[0087] The cross section of the upper air mixing chamber decreases from one side to the other side of the upper drying nozzle air inlet 11;

[0088] The cross section of the upper air mixing chamber decreases gradually from one side to the other side of the lower drying nozzle air inlet 21 .

[0089] Taking the above air mixing chamber as an example, after the hot air enters from the lower drying nozzle air inlet 21, the inner wall of the upper air mixing chamber generates resistance to the hot air, causing the hot air to lose kinetic energy and reduce the wind speed, thereby making the speed of the hot fluid flowing out from each point of the left air chamber outlet 312 tend to be consistent, thereby improving the uniformity of the wind speed of the air discharged into the first left air mixing chamber 32.

[0090] Reference Figure 7This embodiment further provides an oven comprising any of the above-described base film support structures 100, wherein the base film support structures 100 are arranged parallel to each other. The multiple base film support structures 100 can ensure that the base film is heated as evenly as possible, and the multiple support rollers 3 can improve the support strength of the base film.

[0091] In one embodiment, on one side of the oven, the left ends of the base film support structures 100 and the right ends of the base film support structures 100 are alternately arranged; along the width direction of the base film, the heat applied to various parts of the base film is balanced.

[0092] The above is a specific description of the preferred implementation of the present invention, but the invention of the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A basement membrane support structure, characterized in that: It comprises an upper drying nozzle (1), a lower drying nozzle (2) and a supporting roller (3); The bottom of the upper drying nozzle (1) is provided with a lower air outlet; An upper air outlet (23) is provided on the top of the lower drying nozzle (2); The lower air outlet and the upper air outlet (23) are arranged opposite to each other, and together discharge air to dry the base film located between the upper drying nozzle (1) and the lower drying nozzle (2); The supporting roller (3) is rotatably arranged on the top of the lower drying nozzle (2).

2. The base membrane support structure according to claim 1, wherein: The supporting roller (3) is arranged in the middle of the lower drying nozzle (2).

3. The base membrane support structure according to claim 1, wherein: A first mounting seat (41) and a second mounting seat (42) are fixedly provided on the lower drying nozzle (2); one end of the support roller (3) is rotatably connected to the first mounting seat (41), and the other end of the support roller (3) is rotatably connected to the second mounting seat (42).

4. The base membrane support structure according to claim 1, wherein: A first film-stretching space (231) and a second film-stretching space (232) are provided between the upper drying nozzle (1) and the lower drying nozzle (2); along the axial direction of the support roller (3), the first film-stretching space (231) is provided at one end of the support roller (3), and the second film-stretching space (232) is provided at the other end of the support roller (3).

5. The base membrane support structure according to claim 1, wherein: It also includes a first drying nozzle fixing part (5), a second drying nozzle fixing part (6), a third drying nozzle fixing part (7) and a drying nozzle connecting part (8); The first drying nozzle fixing member (5) is hinged to the left end of the upper drying nozzle (1), and the third drying nozzle fixing member (7) is connected to the right end of the upper drying nozzle (1); The second drying nozzle fixing member (6) is hinged to the left end of the lower drying nozzle (2); The first drying nozzle fixing part (5) and the second drying nozzle fixing part (6) are fixed in relative positions; One end of the drying nozzle connecting piece (8) is arranged at the right end of the upper drying nozzle (1), and the other end of the drying nozzle connecting piece (8) is arranged at the right end of the lower drying nozzle (2). The drying nozzle connecting piece (8) is used to fix the relative positions of the right end of the upper drying nozzle (1) and the right end of the lower drying nozzle (2).

6. The base membrane support structure according to claim 5, wherein: The third drying nozzle fixing member (7) is connected to the right end of the lower drying nozzle (2), and the third drying nozzle fixing member (7) comprises a fixed pulley (71) and a movable belt sliding on the fixed pulley (71); The fixed pulley (71) is arranged above the upper drying nozzle (1); one end of the movable belt is detachable from the right end of the upper drying nozzle (1), and the other end of the movable belt is detachable from the right end of the lower drying nozzle (2).

7. The base membrane support structure according to claim 5, wherein: The drying nozzle connecting member (8) comprises a hook (81), a first locking rod (821), a second locking rod (822), a first pin (831), a second pin (832), a first handle (841), a second handle (842), a connecting rod (85) and a buckle seat (86); The hook (81) is provided at the right end of the upper drying nozzle (1), and the bent body of the hook (81) is bent toward the upper side of the upper drying nozzle (1); The connecting rod (85) is hinged to the right end of the lower drying nozzle (2), and the end of the connecting rod (85) away from the lower drying nozzle (2) is provided with the buckle seat (86); One end of the first handle (841) is hinged to the buckle seat (86) via the first pin (831); One end of the second handle (842) is hinged to the buckle seat (86) via the second pin (832); The first pin shaft (831) and the second pin shaft (832) are parallel to each other, and the second pin shaft (832) is arranged on a side of the first pin shaft (831) close to the lower drying nozzle (2); The first locking rod (821) includes a first locking rod (823) that cooperates with the hook (81); The second locking rod (822) includes a second locking rod (824) that cooperates with the hook (81); The first handle (841) is rotated with the first pin (831) as the rotation axis to lock the first locking rod (821) into the hook (81); The second handle (842) is rotated with the second pin shaft (832) as the rotation axis to lock the second locking rod (822) in the hook (81); thereby fixing the relative positions of the upper drying nozzle (1) and the lower drying nozzle (2).

8. The base membrane support structure according to any one of claims 1 to 7, characterized in that: An upper drying nozzle air inlet (11) is provided on one side of the upper drying nozzle (1), and an upper air mixing chamber is provided inside the upper drying nozzle (1); A lower drying nozzle air inlet (21) is provided on one side of the lower drying nozzle (2), and an upper air mixing chamber is provided inside the lower drying nozzle (2); The cross section of the upper air mixing chamber decreases from one side to the other side along the upper drying nozzle air inlet (11); The cross section of the upper air mixing chamber decreases gradually from one side to the other side of the lower drying nozzle air inlet (21).

9. An oven, characterized in that: It comprises a base membrane support structure (100) as described in any one of claims 1 to 8, wherein each of the base membrane support structures (100) is arranged parallel to each other.

10. The oven according to claim 9, wherein: On one side of the oven, the left ends of the base film support structures (100) and the right ends of the base film support structures (100) are alternately arranged.

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