Film clamping mechanism for plastic bag processing
By designing a film clamping mechanism including a frame and a clamping unit, the problem of film traction disorder in plastic bag processing is solved, and the adaptive clamping and orderly traction of the film are realized.
Patent Information
- Application Number
- CN202422232428.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-11
AI Technical Summary
During the plastic bag processing process, the film disappears instantly due to tension after cutting and other processes, which easily leads to traction disorder, resulting in misalignment of the traction of the film or excessive stretching.
A film clamping mechanism including a frame and several clamping units is designed. The clamping unit consists of an articulated crane arm, a film guide roller and a magnetic positioning block. The film is clamped through the film guide rollers. The crane arm is suspended in a natural state.
Adaptive clamping and accumulation of the film when the traction force is suddenly reduced is achieved, traction disorder and tension fluctuations are avoided, and orderly traction of the film is ensured.
Smart Images
Figure CN223001187U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plastic bag processing, and relates to a film clamping mechanism for plastic bag processing. Background Art
[0002] During the processing of degradable plastic bags, operations such as cutting, edge locking, and wrinkling are carried out under the state of film traction. When the tension of the continuously tractioned film suddenly disappears due to operations such as cutting at the rear, it is easy to occur traction disorder. Due to the existence of inertia force, the film pulling unit for pulling the film is also prone to tensile force fluctuations when the rear tension suddenly decreases, affecting film traction, resulting in situations such as film traction misalignment and excessive stretching of the film. Therefore, it is necessary to set an adaptive clamping mechanism for the film before the cutting unit and the film pulling unit, so that when the pulling mechanism suddenly stops pulling the film due to cutting needs, the film can adaptively stop being pulled and be clamped orderly, and when the film pulling mechanism works again, it can release the pulling of the film. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a film clamping mechanism for plastic bag processing in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is how to clamp the film adaptively.
[0004] The purpose of the utility model can be achieved by the following technical solutions: A film clamping mechanism for plastic bag processing, characterized in that it includes a frame and a number of clamping units arranged on the frame. The clamping unit includes a first lifting arm hinged to the frame and a second lifting arm hinged to the middle of the first lifting arm. The upper end of the first lifting arm is hinged to the frame, the lower end of the first lifting arm is rotatably connected with a first film guiding roller, the upper end of the second lifting arm is hinged to the middle of the first lifting arm, and the lower end of the second lifting arm is rotatably connected with a second film guiding roller. The film passes through between the first film guiding roller and the second film guiding roller.
[0005] Further, the clamping unit further includes a magnetic positioning block arranged on the frame, and the magnetic positioning block can adsorb the iron first film guiding roller.
[0006] Due to their own weights, the first lifting arm and the second lifting arm are in a hanging state in the natural state, that is, both the first lifting arm and the second lifting arm are close to the vertical state. At this time, the film located between the first film guiding roller and the second film guiding roller is clamped. This clamping does not mean that the film cannot be pulled, but the traction force of the film from the rear needs to first overcome the gravity of the first lifting arm and the second lifting arm to make them swing. Therefore, when the film is pulled again, it needs to overcome a certain resistance. In this way, when the traction force at the rear of the film suddenly decreases, this device can accumulate a certain amount of the film and slightly clamp it, and when the traction force at the rear appears again, it can also resume orderly traction under the action of a certain traction force. Description of the Drawings
[0007] Figure 1 This is a schematic structural view of the film clamping mechanism in the film traction state.
[0008] Figure 2 This is a schematic structural view of the film clamping mechanism in the film clamping state.
[0009] Figure 3 This is a schematic structural view of the film clamping mechanism in the film threading state.
[0010] In the figure, 1 is the frame; 2 is the first lifting arm; 3 is the second lifting arm; 4 is the first film guiding roller; 5 is the second film guiding roller; 6 is the magnetic positioning block. Specific embodiments
[0011] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.
[0012] As Figure 1 shown, the film clamping mechanism for plastic bag processing includes a frame 1 and a plurality of clamping units arranged on the frame 1. The clamping unit includes a first lifting arm 2 hinged to the frame 1 and a second lifting arm 3 hinged to the middle of the first lifting arm 2. The upper end of the first lifting arm 2 is hinged to the frame 1, the lower end of the first lifting arm 2 is rotatably connected with a first film guiding roller 4, the upper end of the second lifting arm 3 is hinged to the middle of the first lifting arm 2, the lower end of the second lifting arm 3 is rotatably connected with a second film guiding roller 5, and the film passes through between the first film guiding roller 4 and the second film guiding roller 5; the clamping unit further includes a magnetic positioning block 6 arranged on the frame 1, and the magnetic positioning block 6 can adsorb the iron first film guiding roller 4.
[0013] Due to their own weight, the first lifting arm 2 and the second lifting arm 3 are in a hanging state in the natural state, that is, both the first lifting arm 2 and the second lifting arm 3 are close to the vertical state. At this time, the film located between the first film guiding roller 4 and the second film guiding roller 5 is clamped. This clamping does not mean that the film cannot be pulled. Instead, the pulling force of the film from the rear needs to first overcome the gravity of the first lifting arm 2 and the second lifting arm 3 to make them swing. Therefore, when the film is pulled again, a certain resistance needs to be overcome. In this way, when the pulling force at the rear of the film suddenly decreases, the device can accumulate a certain amount of the film and slightly clamp it, and when the pulling force at the rear appears again, it can also resume orderly pulling under the action of a certain pulling force.
[0014] Figure 1 is the state when the film is being pulled, Figure 2 is the state when the pulling force at the rear of the film suddenly decreases, Figure 3 is the state when the film is first threaded or when the film is completely released when a fault occurs.
[0015] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.
Claims
1. A film clamping mechanism for plastic bag processing, characterized in that: The invention comprises a frame (1) and a plurality of clamping units arranged on the frame (1), wherein the clamping units comprise a first suspension arm (2) hinged on the frame (1), and a second suspension arm (3) hinged on the middle part of the first suspension arm (2); the upper end of the first suspension arm (2) is hinged to the frame (1); the lower end of the first suspension arm (2) is rotatably connected to a first film guide roller (4); the upper end of the second suspension arm (3) is hinged to the middle part of the first suspension arm (2); the lower end of the second suspension arm (3) is rotatably connected to a second film guide roller (5); and a film passes between the first film guide roller (4) and the second film guide roller (5).
2. A film clamping mechanism for plastic bag processing according to claim 1, characterized in that: The clamping unit further comprises a magnetic positioning block (6) arranged on the frame (1), and the magnetic positioning block (6) is capable of adsorbing the ferrous first film guide roller (4).