An automatic switching type thin film linear feeder

Abstract

The utility model discloses an automatic switching formula thin film linear feeding machine belongs to automatic packaging equipment technical field, for the single specification of existing feeding equipment, the problem of poor feeding precision and time -consuming roll changing, and an innovative scheme is proposed, the feeding machine includes membrane frame, at least two film roll, automatic film feeding mechanism, thin film welding machine and film guide roller group, and each film roll corresponds an automatic film feeding mechanism, and this mechanism provides the continuous thrust through the pushing cylinder, and the film feeding pressure wheel driven by servo motor is always pressed on the film roll surface, and the precision linear feeding of thin film is realized with constant linear velocity and friction transmission mode, the utility model discloses realize the automatic switching of multi -specification film, high -speed high -precision feeding and quick roll changing, and the production flexibility and efficiency are greatly promoted.

Description

Technical Field

[0001] This utility model relates to an automatic switching linear film feeder, belonging to the technical field of automated packaging equipment. Background Technology

[0002] In automated packaging production lines such as high-speed appliance sleeve wrapping, the stability and efficiency of the film feeding rack are crucial. Existing film feeding equipment typically suffers from the following drawbacks: First, most equipment can only carry film rolls of a single specification. When faced with the mixed production of products of multiple specifications, frequent shutdowns are required to change film rolls, making flexible production impossible and resulting in low efficiency.

[0003] Secondly, traditional feeding methods typically involve directly driving the film roll to rotate (angular velocity driven). In this method, the outer diameter of the film roll continuously decreases as it rolls from full to empty, causing changes in the film's linear velocity and resulting in inaccurate feeding length. Especially under high-speed operation and frequent start-stop conditions, the large rotational inertia of a large-diameter film roll can lead to deviations in start-stop positions. Combined with potential elliptic deformation of the film roll, this further accumulates feeding errors, affecting the final packaging quality.

[0004] Finally, the process of replacing a roll of film with a new one when it runs out is extremely cumbersome. Operators need to manually pass the new film through a series of complex guide rollers, a process that typically takes 3-5 minutes, causing the entire production line to come to a standstill and severely impacting overall equipment efficiency.

[0005] Therefore, there is an urgent need in this field for a linear film feeding device that can achieve automatic switching between multiple specifications, high feeding accuracy, and fast roll changing. Utility Model Content

[0006] This invention overcomes the shortcomings of the existing technology and provides an automatic switching linear film feeder to solve the technical problems of single feeding specifications, poor feeding accuracy and long roll changing time in existing equipment.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: an automatic switching linear film feeder, including a film frame, at least two film rolls, an automatic film feeding mechanism, a film welding machine and a film guide roller group. The film rolls are arranged side by side on the film frame for storing films of different specifications. Each film roll is provided with an automatic film feeding mechanism for supplying film at a linear speed. The automatic film feeding mechanism includes: a film feeding roll frame, a film feeding pressure roller, a drive motor, a drive shaft, and a pusher cylinder. The upper end of the film feeding roll frame is movably mounted on the film frame, and the lower end of the film feeding roll frame is movably connected through the drive shaft. The two ends of the drive shaft are fixedly mounted with film feeding pressure rollers. The drive motor is fixedly mounted on the film feeding roll frame, and the power output end of the drive motor is poweredly connected to the drive shaft. The drive motor drives the drive shaft to rotate the film feeding pressure roller. The cylinder body of the pusher cylinder is movably mounted on the film frame, and the piston rod of the pusher cylinder is movably mounted at the lower part of the film feeding roll frame. The pusher cylinder provides continuous thrust to keep the film feeding pressure roller in contact with the surface of the film roll through friction. The film guide roller assembly is located at the exit end of the film roll and is used to guide the film path. The film welding machine is mounted on the film frame and is used to connect the ends of the old and new films when the film roll is changed.

[0008] Select the film roll according to the product specifications, and achieve the supply of film at a linear speed by controlling the coordinated action of the drive motor, film welding machine and pusher cylinder.

[0009] Furthermore, the drive motor is a servo motor, which controls the length of the diaphragm supply via pulse control.

[0010] Furthermore, the film feeding rollers symmetrically press against the surface of the film roll, and the circumference of the film feeding rollers serves as a measurement reference for the film supply length.

[0011] Furthermore, the film guide roller assembly includes multiple film-winding rollers arranged on the film path to reduce film deviation and ensure smooth transport.

[0012] Furthermore, the film welding machine is either manually or automatically operated and is used to press the film ends together to achieve rapid roll change.

[0013] Furthermore, the programmable controller can automatically switch the film roll and adjust the film supply parameters by using preset instructions.

[0014] Furthermore, it also includes a detection sensor for monitoring the film buffer length and triggering the film feeding action.

[0015] The advantages of this utility model compared with the prior art are: 1. This utility model, by setting up multiple film rolls and an automatic switching mechanism, adapts to the mixed production mode of products with multiple specifications, thereby improving the flexibility of the production line.

[0016] 2. This utility model adopts a linear friction feeding method based on the drive roller, which replaces the traditional angular velocity drive, eliminates the influence of film roll diameter changes and ellipticity on feeding accuracy, and realizes fixed-length precise feeding under high-speed conditions.

[0017] 3. This utility model achieves rapid roll changing through a thin film welding device, reducing the roll changing time from several minutes to tens of seconds, greatly reducing unplanned downtime and improving the overall production capacity and operating efficiency of the line.

[0018] 4. The feeding actuator of this utility model can automatically compensate for changes in the shape and diameter of the film roll, ensuring the continuous stability of the friction transmission between the drive roller and the film, making the equipment operation more reliable. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0022] Figure 3 This is a schematic diagram showing the position of the film welding machine in this utility model.

[0023] Figure 4 This is a schematic diagram of the working position of the automatic film feeding mechanism in this utility model.

[0024] In the diagram: 1 is the film frame, 2 is the film roll, 3 is the automatic film feeding mechanism, 31 is the film roll feeding roller frame, 32 is the film feeding pressure roller, 33 is the drive motor, 34 is the drive shaft, 35 is the pusher cylinder, 4 is the film welding machine, and 5 is the film guide roller group. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments.

[0026] like Figures 1 to 4 As shown, this utility model discloses an automatic switching linear film feeder, which includes a film frame 1, two film rolls 2, two automatic film feeding mechanisms 3, a film welding machine 4, and a film guide roller group 5.

[0027] Film rolls 2 (roll A and roll B) are mounted side-by-side on film holder 1. Each film roll 2 corresponds to an independent automatic film feeding mechanism 3. The upper end of the film feeding roller frame 31 of the automatic film feeding mechanism 3 is movably connected to the film holder 1 via a rotating shaft. A drive shaft 34 movably passes through the lower end of the film feeding roller frame 31, and film feeding pressure rollers 32 are mounted at both ends. A drive motor 33 (preferably a servo motor) drives the drive shaft 34 to rotate, thereby driving the two film feeding pressure rollers 32 to rotate synchronously. The cylinder body of the pusher cylinder 35 is hinged to the film holder 1, and its piston rod is hinged to the lower middle part of the film feeding roller frame 31. Under the continuous thrust of the pusher cylinder 35, the entire film feeding roller frame 31 can swing around the upper hinge point, so that the film feeding pressure rollers 32 are always tightly pressed against the outer surface of the film roll 2.

[0028] The film guide roller assembly 5, consisting of multiple film-winding rollers, is positioned along the film path to guide and stabilize the film. The film welding machine 4 is mounted on the film holder 1 in an easily accessible location for welding new and old films.

[0029] During operation, the control system (such as a PLC) selects and activates the corresponding film roll 2 according to the product specifications. Taking roll A as an example, the control system controls the drive motor 33 (servo motor) corresponding to roll A to rotate precisely according to a preset number of pulses, driving the film feeding roller 32 to "pull" the film from roll A at a constant linear speed through friction. The circumference of the film feeding roller 32 serves as the measurement reference, achieving precise fixed-length feeding. At the same time, the pushing cylinder 35 is always working to ensure that the film feeding roller 32 continuously follows the decrease in the diameter of roll A, maintaining constant pressure contact.

[0030] When roll A is almost used up, the detection sensor sends a signal to alert the operator. The operator then aligns and welds the end of roll B with the end of roll A on the film welding machine 4. Subsequently, the control system switches to the automatic film feeding mechanism 3 corresponding to roll B for feeding. The entire process eliminates the need for manual film winding, achieving rapid, automatic switching and high-precision linear feeding.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An automatic switching linear film feeder, characterized in that, The system includes a film frame (1), at least two film rolls (2), an automatic film feeding mechanism (3), a film welding machine (4), and a film guide roller group (5). The film rolls (2) are arranged side by side on the film frame (1) for storing films of different specifications. Each film roll (2) is provided with an automatic film feeding mechanism (3) for supplying film at a linear speed. The automatic film feeding mechanism (3) comprises: a film feeding roll frame (31), a film feeding pressure roller (32), a drive motor (33), a drive shaft (34), and a pusher cylinder (35). The upper end of the film feeding roll frame (31) is movably mounted on the film frame (1), and the lower end of the film feeding roll frame (31) is movably connected through the drive shaft (34). The two ends of the drive shaft (34) are fixedly mounted with film feeding pressure rollers (32). The drive motor (33) is fixedly mounted on the film feeding roll frame (31), and the drive motor... The power output end of the machine (33) is connected to the drive shaft (34). The drive shaft (34) is driven by the drive motor (33) to rotate the film feeding roller (32). The cylinder body of the pusher cylinder (35) is movably mounted on the film frame (1). The piston rod of the pusher cylinder (35) is movably mounted on the lower part of the film feeding roll frame (31). The pusher cylinder (35) provides continuous thrust to keep the film feeding roller (32) in contact with the surface of the film roll (2), so that the film feeding roller (32) contacts the surface of the film roll through friction. The film guide roller group (5) is set at the film exit end of the film roll (2) and is used to guide the film path; The film welding machine (4) is mounted on the film frame (1) and is used to connect the ends of the old and new films when the film roll is replaced; Select the film roll (2) according to the product specifications, and achieve the supply of film at linear speed by controlling the coordinated action of the drive motor (33), film welding machine (4) and pusher cylinder (35).

2. The automatic switching linear film feeder according to claim 1, characterized in that, The drive motor (33) is a servo motor, which controls the length of the diaphragm supply through pulse control.

3. The automatic switching linear film feeder according to claim 1, characterized in that, The film feeding roller (32) presses symmetrically on the surface of the film roll (2), and the circumference of the film feeding roller (32) serves as the measurement reference for the film supply length.

4. The automatic switching linear film feeder according to claim 1, characterized in that, The film guide roller assembly (5) includes multiple film-winding rollers arranged on the film path to reduce film deviation and ensure smooth transport.

5. The automatic switching linear film feeder according to claim 1, characterized in that, The film welding machine (4) is a manual or automatic operation type, used to press the film ends to achieve quick roll change.

6. The automatic switching linear film feeder according to claim 1, characterized in that, The programmable controller automatically switches the film roll and adjusts the film supply parameters by pre-setting instructions.

7. The automatic switching linear film feeder according to claim 1, characterized in that, It also includes a detection sensor for monitoring the film buffer length and triggering the film supply action.

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