Transverse zipper clamp easy to transform

Abstract

The utility model relates to the technical field of edge clamps of stretch forming equipment, in particular to a simply modified transverse zipper clamp which comprises a supporting seat, a cantilever, a clamping arm and a supporting plate, one end of the cantilever is fixedly arranged on the supporting seat, the other end of the cantilever is rotatably provided with the clamping arm, and the supporting plate is fixedly arranged on the supporting seat and below the cantilever. A clamping head is arranged at the end, close to the supporting plate, of the clamping arm, a clamping area capable of containing a film is formed between the clamping head and the supporting plate, the clamping head is provided with an unlocking plane close to the cantilever, the lower surface of the cantilever is provided with a limiting wedge face attached to the unlocking plane, the clamping head is provided with a locking face, the locking face makes contact with the supporting plate and is in a closed clamping state, and the unlocking plane makes contact with the limiting wedge face. And the distance between the lowest point of the chuck and the supporting plate is H. According to the transverse zipper clamp, the unlocking plane on the clamp head abuts against the limiting wedge face on the cantilever in a matched mode, the clamp is opened in place, it is guaranteed that the distance between the lowest point of the clamp head and the supporting plate is the largest, and on the premise that the clamping area is not changed, a film can smoothly stretch into a clamping area.

Description

Technical Field

[0001] The utility model relates to the technical field of edge clamps of stretching and forming equipment, in particular to a horizontally zipper clamp with simple transformation. Background Technique

[0002] BOPET polyester film has excellent mechanical properties, heat resistance, electrical insulation properties, water vapor barrier properties, dimensional stability, tear resistance, weather resistance, and good coating processing properties, etc., and is widely used in the fields of electronics, electrical insulation, optical liquid crystal display, solar backplane, new energy, power battery, etc. In recent years, with the increasing demand for BOPET polyester film, the production capacity has also been gradually expanded.

[0003] However, various problems will inevitably occur during the production process of polyester film, which have a greater impact on the output and yield (good rate). The first and foremost is the stability of film formation, which is related to the state of the edge of the incoming horizontal thick sheet, the design of the chain clamp, and the temperature to a certain extent.

[0004] After being extruded by an extruder in the film field, the obtained film is too thick to meet the use requirements and must be longitudinally and horizontally stretched by a film stretching device to reduce the film thickness and ensure its lightness. Among them, the film stretching device includes a track and a chain clamp movably arranged on the track, and the film must be clamped by the chain clamp during the stretching process.

[0005] After retrieval, the patent with the publication number of CN118683047A discloses a chain clamp for a film transverse stretching device, including a chain clamp seat, a cantilever, a clamping arm, a support plate, a cooling groove, a folding pipe, and a liquid collecting box. By setting a driving spring and a reset spring to drive the clamping arm to swing and reset, the film is clamped on the support plate. However, it is found in the actual use process that the rotation of the clamping arm lacks positioning, so it is impossible to determine whether the clamp opening is in place. If the clamp opening is not in place, it will affect the smooth entry of the film between the support plate and the chuck. Content of the Utility Model

[0006] In order to solve the problem that the existing chain clamp cannot determine whether the clamp opening is in place, the utility model provides a horizontally zipper clamp with simple transformation. The unlocking plane on the chuck and the limiting wedge surface on the cantilever are matched and abutted against each other, that is, the clamp opening is in place, so as to ensure that the distance between the lowest point of the chuck and the support plate is the largest, facilitating the film to extend into the clamping area.

[0007] The utility model provides a horizontally zipper clip with a simple transformation, which includes a support base, a cantilever, a clamping arm and a support plate. One end of the cantilever is fixedly arranged on the support base, and a clamping arm is rotatably arranged at the other end. The support plate is fixedly arranged on the support base and is arranged below the cantilever. A clamping head is arranged at one end of the clamping arm close to the support plate, and a clamping area for accommodating a film is formed between the clamping head and the support plate. The clamping head has an unlocking plane close to the cantilever, and a limiting wedge surface fitting with the unlocking plane is arranged on the lower surface of the cantilever. Through the arrangement of the unlocking plane on the clamping head, it can be closely fitted with the limiting wedge surface below the cantilever to ensure that the clamping is in place. At this time, the distance H between the lowest point of the clamping head and the support plate is the largest.

[0008] Further, the clamping head has a locking surface which contacts the support plate in a closed clamping state, and the unlocking plane contacts the limiting wedge surface in an open clamping state. When the clamping arm rotates until the locking surface fits with the upper surface of the support plate, the film placed in the clamping area can be clamped. At this time, the distance H between the lowest point of the clamping head and the support plate is 0.

[0009] Further, the distance between the lowest point of the clamping head and the support plate is H, and 0mm ≤ H ≤ 4.5mm. By reducing the thickness of the unlocking plane, the opening angle of the clip can be increased, that is, the value of H can be increased.

[0010] Further, the roughness of the locking surface is set to Ra ≥ 3.2. Through the setting of the roughness, the clamping stability of the film can be improved.

[0011] Further, transverse concave lines and / or transverse convex lines are formed on the locking surface. Through the setting of the transverse concave and convex lines, the clamping stability of the film is further improved.

[0012] Further, a partition groove is arranged on the locking surface. The partition groove is opened along the transverse pulling direction of the film and is arranged in the middle of the locking surface. Through the setting of the partition groove, the contact area between the locking surface and the film is reduced, ensuring the clamping stability and avoiding damage to the film.

[0013] Further, the clamping head has an avoidance surface which is an inclined surface and is arranged on the side of the clamping head away from the cantilever. The avoidance surface can prevent the end of the clamping head from interfering with the normal opening of the clip and ensure the maximum opening of the clip.

[0014] Further, a clamping pin is arranged between the clamping arm and the cantilever, and the clamping arm rotates relative to the cantilever through the clamping pin. The rotational connection between the clamping arm and the cantilever is realized through the clamping pin.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model provides a horizontally zipper clip with a simple transformation. Through the cooperation and abutment of the unlocking plane on the clamping head and the limiting wedge surface on the cantilever, that is, the clamping is in place, to ensure that the distance between the lowest point of the clamping head and the support plate is the largest, facilitating the film to smoothly extend into the clamping area, thereby effectively improving the output and yield of the transverse stretching of the film. Brief Description of the Drawings

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings;

[0018] Figure 1 is a schematic diagram of the open state of a traditional chain clip;

[0019] Figure 2 is a schematic diagram of the closed state of a traditional chain clip;

[0020] Figure 3 is a schematic diagram of the open state of a horizontal zipper clip;

[0021] Figure 4 is a schematic diagram of the closed state of a horizontal zipper clip;

[0022] Figure 5 is a comparison chart of production data before and after the transformation of the horizontal zipper clip;

[0023] Figure 6 is a comparison chart of yield data before and after the transformation of the horizontal zipper clip;

[0024] In the figure, 1. support base, 2. cantilever, 21. limiting wedge surface, 3. clamping arm, 4. support plate, 5. chuck, 51. unlocking surface, 52. locking surface, 53. avoiding surface, 6. clamping area, 7. clamping pin. Detailed Embodiments

[0025] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0026] As Figure 1 and 2 shown, the traditional horizontal zipper clip includes a support base 1, a cantilever 2, a clamping arm 3 and a support plate 4. One end of the cantilever 2 is fixedly arranged on the support base 1, and the other end is rotatably provided with a clamping arm 3. The support plate 4 is fixedly arranged on the support base 1 and is arranged below the cantilever 2. A clamping pin 7 is arranged between the clamping arm 3 and the cantilever 2, and the clamping arm 3 rotates relative to the cantilever 2 through the clamping pin 7.

[0027] After the polyester thick sheet is cast and longitudinally stretched, it will enter the transverse stretching process. The transverse stretcher has two endless rotating special chains. Clamps are installed on the chains, which can tightly hold both sides of the thick sheet and are supported on the guide rails with variable widths. With the help of the synchronous operation of the two chains in the same direction, the thick sheet first passes through a preheating section with a slightly increasing amplitude, then through a stretching area with a large expansion, and then through a heat treatment area with parallel contraction to shape and relax the film. Finally, it is cooled in a parallel cooling area to complete the transverse stretching. In this process, whether the thick sheet can be smoothly clamped is the most critical step in completing the transverse stretching.

[0028] The cantilever 2 and the pallet 4 are fixedly arranged on the support seat 1 through screws. The clamping arm 3 is rotatably arranged at the end of the cantilever 2 through a clamping pin 7. A spring is arranged between the clamping arm 3 and the support seat 1. Press the handle at the end of the clamping arm 3 to drive the clamping arm 3 to rotate clockwise and compress the spring. Rotate until it contacts the pallet 4. At this time, the clamping of the film is completed. Release the handle at the end of the clamping arm 3, and the clamping arm 3 rotates counterclockwise under the action of the spring and disengages from the pallet 4, and the film can be taken out. The specific spring drive structure is described in detail in the patent with the publication number CN118683047A, and will not be elaborated here.

[0029] During the opening process of the traditional transverse zipper clamp, the opening degree of the clamping arm 3, that is, the distance H between the lowest point of the chuck 5 and the pallet 4, will be hindered by the tail end corner of the chuck 5, resulting in a small opening degree. Coupled with the lack of limit between the end of the chuck 5 and the cantilever 2, it is difficult to ensure that the clamping arm 3 is opened to the maximum extent, making it difficult to place the thick sheet into the clamping area 6. How to increase the distance H between the lowest point of the chuck 5 and the pallet 4, that is, increase the opening degree of the clamping arm 3, while ensuring that the contact surface length L of the closed clamp remains unchanged, as Figure 3 and 4 shown, design a simply modified transverse zipper clamp. A chuck 5 is arranged at one end of the clamping arm 3 close to the pallet 4. A clamping area 6 for accommodating the film is formed between the chuck 5 and the pallet 4. The chuck 5 has an unlocking surface 51 close to the cantilever 2. A limiting wedge surface 21 that fits with the unlocking surface 51 is arranged on the lower surface of the cantilever 2. The chuck 5 has a locking surface 52, and the locking surface 52 contacts the pallet 4, and the contact surface length is L, which is the closed clamp state. The unlocking surface 51 contacts the limiting wedge surface 21, which is the open clamp state. The chuck 5 has an avoidance surface 53, and the avoidance surface 53 is an inclined surface and is arranged on the side of the chuck 5 away from the cantilever 2.

[0030] Through two cuts on the chuck 5, when the chain clamp is in the closed clamp state, the contact surface L between the chain clamp and the edge of the film remains unchanged; when the chain clamp is in the open state, the cooperation between the unlocking surface 51 and the limiting wedge surface 21 can ensure the opening degree, and the setting of the avoidance surface 53 can prevent the end of the chuck 5 from hindering, thereby effectively improving the smoothness of the film edge being clamped.

[0031] The distance between the lowest point of the chuck 5 and the pallet 4 is H, where 0 mm ≤ H ≤ 4.5 mm. Before the transformation, in the open-chuck state, there was only a 2.5-mm opening between the lowest point of the chuck 5 and the pallet 4. After simply cutting the chuck, in the open-chuck state, the opening between the lowest point of the chuck 5 and the pallet 4 increased to 4.2 mm. Moreover, before and after the transformation, in the closed-chuck state, the contact length L between the locking surface 52 and the pallet 4 did not change.

[0032] To ensure the clamping stability of the film, the roughness of the locking surface 52 can be set to Ra ≥ 3.2, and transverse concave grooves and / or transverse convex grooves can also be provided on the locking surface 52.

[0033] On the premise of ensuring the clamping stability of the film, in order to reduce damage to the film, a partition groove is provided on the locking surface 52. The partition groove is opened along the transverse pulling direction of the film and is provided in the middle of the locking surface 52.

[0034] As Figure 5 shown, since the transformation of the chain chuck was completed at the end of June, thanks to the improved film-forming stability, the monthly output has shown an increasing trend as a whole since July. Among them, the highest output record of 2,060.7 tons was set in October.

[0035] As Figure 6 shown, the comprehensive yield and the finished product yield have also increased significantly after July.

[0036] The above description is illustrative rather than restrictive for the present utility model. Those of ordinary skill in the art understand that many modifications, variations, or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all of them will fall within the protection scope of the present utility model.

Claims

1. A horizontally zipper clip with a simple transformation, comprising a support base (1), a cantilever (2), a clamping arm (3) and a support plate (4). One end of the cantilever (2) is fixedly arranged on the support base (1), and the other end is rotatably provided with the clamping arm (3). The support plate (4) is fixedly arranged on the support base (1) and is arranged below the cantilever (2), and is characterized in that: One end of the clamping arm (3) close to the pallet (4) is provided with a chuck (5). A clamping area (6) for accommodating a film is formed between the chuck (5) and the pallet (4). The chuck (5) has an unlocking surface (51) close to the cantilever (2), and a limiting wedge surface (21) fitting with the unlocking surface (51) is arranged on the lower surface of the cantilever (2).

2. The simple modified horizontal zipper clip according to claim 1, wherein: The chuck (5) has a locking surface (52). The locking surface (52) contacts the pallet (4) to be in a closed clamping state, and the unlocking surface (51) contacts the limiting wedge surface (21) to be in an open clamping state.

3. The simple modified horizontal zipper clip according to claim 2, wherein: The distance between the lowest point of the chuck (5) and the pallet (4) is H, where 0mm ≤ H ≤ 4.5mm.

4. A horizontally zippered clip with a simple modification according to claim 2, characterized in that: The roughness of the locking surface (52) is set to Ra ≥ 3.

2.

5. The simple modified horizontal zipper clip according to claim 2, characterized in that: Transverse concave lines and / or transverse convex lines are formed on the locking surface (52).

6. The simple modified horizontal zipper clip according to claim 5, wherein: A partition groove is arranged on the locking surface (52). The partition groove is arranged along the transverse pulling direction of the film and is arranged in the middle of the locking surface (52).

7. A horizontally zippered clip with a simple modification according to claim 1, characterized in that: The chuck (5) has an avoidance surface (53). The avoidance surface (53) is an inclined surface and is arranged on the side of the chuck (5) far from the cantilever (2).

8. A simple modified horizontal zipper clip according to claim 1, characterized in that: A clamping pin (7) is arranged between the clamping arm (3) and the cantilever (2). The clamping arm (3) rotates relative to the cantilever (2) through the clamping pin (7).

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