Full-automatic plastic film roll unloading device
By setting up rubber brake blocks and spring structures on the roll-removing swing arm, the shaking and abrasion problems caused by the rotation of the film roll during high-speed roll-removing process are solved, and a stable and lossless roll-removing process is achieved.
Patent Information
- Application Number
- CN202422583981.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-25
AI Technical Summary
During the high-speed winding process, the plastic film roll remains rotating when unwinding, resulting in problems such as shaking of the unwinding swing arm and scratching the surface of the film roll.
A fully automatic roll-off device for plastic film rolls is designed, adopting a structure with a cylinder seat and a rubber brake block on the roll-off swing arm. The rubber brake block is in line with the circumferential surface of the reel, and a film roll that stops rotation with an upward elastic force is provided through a spring.
It effectively avoids the plastic film roll rotating during the unrolling process, prevents the surface of the film roll from being abraded, and ensures the stability and integrity of the unrolling process.
Smart Images
Figure CN223225443U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plastic film processing production lines, and in particular relates to a fully automatic unloading device for a plastic film roll. Background Art
[0002] During the plastic film winding process, the left and right ends of the winding shaft 8 of the plastic film roll 9 are respectively supported on the longitudinal guide rail 1 extending longitudinally, and each left and right end of the winding shaft 8 is respectively provided with a first bearing 81 and a second bearing 82, wherein the lateral position of the first bearing 81 corresponds to the lateral position of the longitudinal guide rail 1, as shown in FIG. Figure 1 、 Figure 3 As shown, as the diameter of the plastic film roll 9 increases, the plastic film roll 9 and the reeling shaft 8 gradually retreat along the longitudinal guide rail 1. After reeling is completed, the plastic film roll 9 needs to be automatically transferred from the longitudinal guide rail 1 to the unloading trolley 7. The main component responsible for this transfer function is the unloading swing arm 2 driven by the oil cylinder 3. The upper end of the unloading swing arm 2 is formed with an arc-shaped notch 20. The lateral position of the unloading swing arm 2 is staggered with the longitudinal guide rail 1 and corresponds to the lateral position of the second bearing 82. Figure 1 、 Figure 3 、 Figure 4 As shown. During the winding process, when the plastic film roll 9 is pressed against the longitudinal guide rail 1, the weight of the plastic film roll 9 presses on the first bearing 81. When the winding is completed and the unwinding begins, the winding shaft 8 and the plastic film roll 9 are pushed forward along the longitudinal guide rail 1. During this stage, the weight of the plastic film roll 9 still presses on the first bearing 81. When the winding shaft 8 moves to the front end of the longitudinal guide rail 1, the two ends of the winding shaft 8 fall into the arc-shaped notch 20 of the unwinding swing arm 2, as shown. Figure 2 、 Figure 3 、 Figure 4 As shown, when the photoelectric eye mechanism detects this state, the control system commands the oil cylinder 3 to drive the unloading swing arm 2 to swing forward, and the plastic film roll 9 is separated from the longitudinal guide rail 1. The weight of the plastic film roll 9 presses on the second bearing 82; finally, the plastic film roll 9 is transferred to the unloading trolley 7 in front of the unloading swing arm 2, as shown in FIG. Figure 5 As shown, the unloading process is completed.
[0003] In recent years, with the advancement of technology, the winding speed has become faster and faster, reaching 150 to 200 meters per minute. On the other hand, the manufacturing quality of bearings has become better and better. Therefore, when the winding shaft moves to the front end of the longitudinal guide rail, the film roll may still maintain high-speed rotation under the action of inertia. Then, in the subsequent process of the unloading swing arm driving the plastic film roll to swing downward, the film roll continues to rotate, causing the unloading swing arm to vibrate, resulting in unstable cylinder pressure and trembling. What is more serious is that if the plastic film roll is still in a rotating state when it contacts the unloading trolley, the surface of the plastic film roll may be scratched by the upper surface of the unloading trolley, affecting the appearance of the plastic film roll. Utility Model Content
[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a fully automatic unloading device for a plastic film roll, which can prevent the plastic film roll from being in a rotating state when it contacts the unloading trolley.
[0005] Its purpose can be achieved according to the following scheme: a fully automatic unloading device for plastic film rolls, comprising two left and right longitudinal guide rails for placing the winding shaft; a unloading swing arm is installed next to the front end of each longitudinal guide rail, the swing axis of the unloading swing arm extends horizontally, an arc-shaped notch is formed on the upper end of the unloading swing arm, the unloading swing arm is driven by an oil cylinder, and the lateral position of the unloading swing arm is staggered with the longitudinal guide rail; it is characterized in that: a cylinder seat is also fixed on the lateral outer side of the unloading swing arm, the cylinder seat swings along with the unloading swing arm, a spring is provided in the cylinder cavity of the cylinder seat, a brake block is installed on the upper part of the cylinder seat, the top of the brake block is exposed outside the cylinder seat, the top surface of the brake block is an arc shape that matches the circumferential surface of the winding shaft, and the spring applies an upward elastic force to the brake block.
[0006] When the upper portion of the brake block is not subjected to external pressure, the top surface of the brake block is higher than the top surface of the arc-shaped notch of the unloading swing arm.
[0007] The brake pads are preferably rubber brake pads.
[0008] The utility model has the following advantages and effects:
[0009] The utility model can prevent the plastic film roll from rotating during the transfer process by following the swing of the unloading swing arm, and can also prevent the plastic film roll from being in a rotating state when contacting the unloading trolley, thereby preventing the surface of the plastic film roll from being scratched. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the plastic film winding process.
[0011] Figure 2 yes Figure 1 Schematic diagram of the changing state after the winding shaft moves forward and enters the arc-shaped recess of the unloading swing arm.
[0012] Figure 3 yes Figure 2 Schematic diagram of the front view of the shown state.
[0013] Figure 4 yes Figure 3 A is a partial enlarged schematic diagram.
[0014] Figure 5 This is a schematic diagram of the plastic film roll being transferred to the unloading trolley during the unloading process.
[0015] Figure 6 It is a schematic diagram of the overall structure of a specific embodiment of the utility model.
[0016] Figure 7 yes Figure 6 Middle B is a partial enlarged schematic diagram.
[0017] Figure 8 yes Figure 7 Schematic cross-sectional view of the local structure shown.
[0018] Figure 9 yes Figure 8 Schematic diagram of the DD cross-sectional structure.
[0019] Figure 10 It is a schematic diagram of the reeling shaft entering the arc-shaped recess of the unloading swing arm during use of a specific embodiment.
[0020] Figure 11 yes Figure 10 A partial enlarged schematic diagram of center C.
[0021] Figure 12 yes Figure 11 Schematic diagram of the EE cross-sectional structure. DETAILED DESCRIPTION
[0022] Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 The shown fully automatic unloading device for a plastic film roll includes two left and right longitudinal guide rails 1 for placing a winding shaft; a unloading swing arm 2 is installed next to the front end of each longitudinal guide rail 1, and the swing shaft 21 of the unloading swing arm extends in the horizontal direction. An arc-shaped recess 20 is formed on the upper end of the unloading swing arm 2, and the unloading swing arm 2 is driven by the oil cylinder 3 to swing, and the lateral position of the unloading swing arm 2 is staggered with the lateral position of the longitudinal guide rail 1; a cylinder seat 4 is also fixed to the lateral outer side of the unloading swing arm 2, and the cylinder seat 4 swings along with the unloading swing arm 2, and a spring 5 is provided in the cylinder cavity of the cylinder seat 4, and a rubber brake block 6 is installed on the upper part of the cylinder seat 4, and the top of the rubber brake block 6 is exposed outside the cylinder seat 4. The top surface of the rubber brake block 6 is an arc shape that matches the circumferential surface of the winding shaft, and the spring 5 applies an upward elastic force to the rubber brake block 6; when the upper part of the rubber brake block 6 is not subjected to external pressure, the top surface of the rubber brake block 6 is higher than the top surface of the arc-shaped recess 20 of the unloading swing arm.
[0023] The operating principle of the above embodiment is as follows:
[0024] During the fully automatic unloading process, when the plastic film roll 9 moves from the longitudinal guide rail 1 to the arc-shaped notch at the upper end of the unloading swing arm 2, the reel 8 of the plastic film roll presses on the top surface of the rubber brake block 6, and the spring 5 is compressed. Figure 10 、 Figure 11 、 Figure 12As shown, the elastic force of the spring 5 causes the rubber brake block 6 to generate greater pressure and friction on the circumferential surface of the winding shaft 8. The friction force of the rubber brake block 6 can stop the winding shaft 8 (including the plastic film roll 9) that is originally rotating, preventing the plastic film roll 9 from continuing to rotate during the forward swing transfer process following the unloading swing arm 2, and can also prevent the plastic film roll 9 from being in a rotating state when contacting the unloading trolley, thereby preventing the unloading trolley from scratching the surface of the plastic film roll 9.
Claims
1. A fully automatic unloading device for a plastic film roll, comprising two left and right longitudinal guide rails for accommodating a reel; a reel unloading swing arm is mounted adjacent to the front end of each longitudinal guide rail, the swing axis of the reel unloading swing arm extending transversely, an arc-shaped notch formed at the upper end of the reel unloading swing arm, the reel unloading swing arm being driven by an oil cylinder, and the transverse position of the reel unloading swing arm being staggered with respect to the longitudinal guide rails; characterized in that: A cylinder seat is fixed on the lateral outer side of the unloading swing arm, and the cylinder seat swings along with the unloading swing arm. A spring is provided in the cylinder cavity of the cylinder seat, and a brake block is installed on the upper part of the cylinder seat. The top of the brake block is exposed outside the cylinder seat. The top surface of the brake block is an arc shape that matches the circumferential surface of the winding shaft, and the spring applies an upward elastic force to the brake block.
2. The fully automatic unloading device for plastic film rolls according to claim 1, characterized in that: When the upper portion of the brake block is not subjected to external pressure, the top surface of the brake block is higher than the top surface of the arc-shaped notch of the unloading swing arm.
3. The fully automatic unloading device for plastic film rolls according to claim 1 or 2, characterized in that: The brake block is a rubber brake block.