A feeding mechanism for realizing constant-speed feeding and constant-speed variable-interval feeding

Abstract

The application relates to a feeding mechanism for realizing uniform feeding and uniform variable-interval feeding, and belongs to the technical field of packaging bag processing equipment. The feeding mechanism comprises a rack, a traction rubber roller group, a feeding rubber roller group and a tension control unit arranged in sequence along a film conveying direction on the rack, a movable roller unit arranged between the traction rubber roller group and the feeding rubber roller group, a proximity photoelectric sensor arranged on the rack, a feeding photoelectric sensor arranged on the inlet side of the feeding rubber roller group, the feeding rubber roller group being stopped when the feeding photoelectric sensor tracks a color mark on the film, and the movable roller unit absorbing the material sent out by the traction rubber roller group and the material pulled away by the tension control unit. Under the condition of uniform feeding of the film, the film is intermittently stopped, and various operations such as punching and easy-tear-line punching and the like which need to be implemented under the condition of material feeding stoppage are realized.

Description

Technical Field

[0001] This invention relates to a feeding mechanism that achieves uniform feeding and intermittent feeding, belonging to the technical field of packaging bag processing equipment. Background Technology

[0002] Packaging bags refer to bags used for packaging various goods, facilitating transportation and storage during production and distribution. They are widely used in daily life and industrial production. Bag-making machines are machines that produce various plastic or other material packaging bags, processing bags of different sizes, thicknesses, and specifications.

[0003] Some packaging bags require perforations or tear lines on the film, which must be done while the material is stopped, severely impacting production efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a feeding mechanism that realizes uniform feeding and intermittent feeding, which enables the film to stop intermittently while feeding at a uniform speed, thereby realizing various operations that require the film to stop and improving production efficiency.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows: a feeding mechanism for achieving uniform-speed feeding and intermittent feeding, comprising a frame, on which a traction roller group, a feeding roller group, and a tension control unit are arranged sequentially along the film conveying direction. The film is sequentially conveyed to the tension control unit through the traction roller group and the feeding roller group. The tension control unit controls the tension of the film, thereby feeding the film at a uniform speed. A movable roller unit is provided between the traction roller group and the feeding roller group. A proximity photoelectric sensor is provided on the frame, and a feeding photoelectric sensor is provided on the inlet side of the feeding roller group. When the feeding photoelectric sensor tracks the color mark on the film, the feeding roller group stops feeding. The movement of the movable roller unit absorbs the material fed out by the traction roller group and the material pulled away by the tension control unit. When the movable roller unit triggers the proximity photoelectric sensor, it controls the feeding roller to start feeding, and the movable roller unit moves in the opposite direction to achieve uniform-speed intermittent feeding.

[0006] The movable roller unit includes a first roller group and a second roller group. The two inner side walls of the frame are symmetrically arranged with two sets of mounting blocks. A horizontally arranged guide rod is provided between the mounting blocks on the same side. A slider is sleeved on the guide rod, and a connecting plate is provided on the slider. The first roller group and the second roller group are mounted between the two connecting plates. The slider can move along the guide rod, thereby driving the first roller group and the second roller group to move synchronously.

[0007] The first roller group includes two first rollers arranged vertically in parallel, and the second roller group includes two second rollers arranged vertically in parallel.

[0008] A punching frame is provided between the first roller group and the feeding rubber roller group, and a punching machine is provided on the punching frame.

[0009] The tension control unit includes a fixed roller group, which is fixed on the frame. A tension control arm is provided on the side of the fixed roller group. One end of the tension control arm is hinged to the frame. A movable roller group is provided on the tension control arm. The tension control arm is driven to rotate around the hinge point, causing the tension control arm to move closer to or away from the fixed roller group, so that the movable roller group moves synchronously.

[0010] Compared with existing technologies, the advantages of this invention are as follows: A feeding mechanism that achieves uniform-speed feeding followed by intermittent feeding. When the feeding roller assembly stops feeding, the material fed by the traction roller assembly and the material pulled away by the tension control unit move away from the traction roller assembly via a movable roller unit, thereby absorbing the material fed by the traction roller assembly and the material pulled away by the tension control unit. When the movable roller unit moves and triggers a proximity photoelectric sensor, it controls the feeding roller assembly to start feeding again, and the movable roller unit moves in the opposite direction, repeating this process repeatedly. This achieves the transition from uniform-speed feeding to intermittent feeding, enabling various operations that require a feeding stop. Under uniform film feeding, intermittent film stopping is achieved, enabling a series of operations that require a feeding stop, such as perforation and easy-tear lines, thus improving production efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a feeding mechanism that achieves uniform speed feeding and uniform speed intermittent feeding according to an embodiment of the present invention;

[0012] Figure 2 for Figure 1 Schematic diagram of a moving roller assembly;

[0013] In the diagram, 1 is the frame, 2 is the movable roller unit, 2.1 is the mounting block, 2.2 is the slider, 2.3 is the guide rod, 2.4 is the first roller group, 2.5 is the second roller group, 2.6 is the connecting plate, 3 is the traction roller group, 4 is the proximity photoelectric sensor, 5 is the punching frame, 6 is the feeding photoelectric sensor, 7 is the feeding roller group, 8 is the fixed roller group, 9 is the cylinder, 10 is the tension control arm, and 11 is the movable roller group. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1As shown, this embodiment of a feeding mechanism for achieving uniform-speed feeding and intermittent feeding includes a frame 1. The frame 1 is equipped with a traction roller group 3, a feeding roller group 7, and a tension control unit, arranged sequentially along the film conveying direction. The film is sequentially conveyed through the traction roller group 3 and the feeding roller group 7 to the tension control unit, which controls the film tension, thus ensuring uniform film feeding. A movable roller unit 2 is provided between the traction roller group 3 and the feeding roller group 7. A proximity photoelectric sensor 4 is provided on the frame 1, and a feeding photoelectric sensor 6 is provided on the inlet side of the feeding roller group 7. When the feeding photoelectric sensor 6 detects a color mark on the film, it sends a signal back to the control system, thereby controlling the feeding roller group 7 to stop feeding. The material fed out by the traction roller group 3 and the material pulled away by the tension control unit move away from the traction roller group via the movable roller unit 2, thereby absorbing the material fed out by the traction roller group 3 and the material pulled away by the tension control unit. When the movable roller unit 2 moves and triggers the proximity photoelectric sensor 4, it controls the feeding roller group 7 to start feeding. The movable roller unit 2 moves in the opposite direction, and so on, repeating the movement. That is, the uniform feeding speed changes to intermittent feeding, realizing various operations that require the feeding to stop.

[0016] like Figure 2 As shown, the movable roller unit includes a first roller group 2.4 and a second roller group 2.5. Mounting blocks 2.1 are symmetrically arranged in pairs on the two inner walls of the frame 1. A horizontally arranged guide rod 2.3 is positioned between two mounting blocks 2.1 on the same side. Slider blocks 2.2 are fitted onto the guide rods 2.3, and connecting plates 2.6 are respectively installed on the sides of the sliders 2.2. The first roller group and the second roller group are mounted between the two connecting plates 2.6. The guide roller group pulls the film to the first roller group, then through the feeding roller group to the second roller group, and finally to the tension control unit. Under the traction of the guide roller group and the feeding roller group, the sliders reciprocate along the guide rods, thereby causing the first roller group and the second roller group to move synchronously.

[0017] The first roller group includes two first rollers arranged vertically in parallel, and the second roller group includes two second rollers arranged vertically in parallel.

[0018] A punching frame 5 is installed between the first roller group and the feeding roller group, and a punching machine is mounted on the punching frame 5. When the feeding roller group stops feeding, the punching machine punches holes in the stopped film. The punching machine can be replaced with other equipment to achieve various operations that require the film to stop feeding.

[0019] The aforementioned tension control unit includes a fixed roller assembly 8, which is fixed to the frame 1. An inclined tension control arm 10 is provided on the outer side of the fixed roller assembly 8. One end of the tension control arm 10 is hinged to the frame 1. A movable roller assembly 11 is mounted on the tension control arm 10. A cylinder 9 drives the tension control arm 10 to rotate around the hinge point, causing the tension control arm 10 to move closer to or away from the fixed roller assembly 8, thus synchronizing the movement of the movable roller assembly 11 and controlling the tension of the film. The rotational speed of the traction roller assembly is finely adjusted by a displacement sensor, and the swing magnitude of the tension control arm corresponds to the rotational speed of the traction roller assembly.

[0020] This application enables intermittent film stopping under uniform film feeding conditions, allowing for various operations such as punching and tearing lines that require the film to be stopped, thereby improving production efficiency.

[0021] In addition to the above embodiments, the present invention also includes other embodiments. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.

Claims

1. A feeding mechanism for achieving uniform-speed feeding and uniform-speed variable-intermittent feeding, characterized in that: The machine frame is provided with a traction rubber roller group, a feeding rubber roller group and a tension control unit, which are arranged in sequence along the film conveying direction, the film is conveyed to the tension control unit through the traction rubber roller group and the feeding rubber roller group, the tension control unit controls the tension of the film, and then the film is uniformly fed; a movable roller unit is arranged between the traction rubber roller group and the feeding rubber roller group, a proximity photoelectric sensor is arranged on the machine frame, a feeding photoelectric sensor is arranged on the inlet side of the feeding rubber roller group, when the feeding photoelectric sensor tracks the color mark on the film, the feeding rubber roller group stops feeding, the movement of the movable roller unit absorbs the material sent out by the traction rubber roller group and the material pulled away by the tension control unit; when the movable roller unit triggers the proximity photoelectric sensor, the feeding rubber roller group starts feeding, and the movable roller unit moves reversely, realizing uniform and intermittent feeding. The movable roller unit comprises a first roller group and a second roller group, two mounting blocks are symmetrically arranged on the two inner side walls of the machine frame, two mounting blocks are arranged as a group, a horizontal guide rod is arranged between the mounting blocks on the same side, a sliding block is sleeved on the guide rod, a connecting plate is arranged on the sliding block, the first roller group and the second roller group are arranged between the two connecting plates, the sliding block can move along the guide rod, thereby driving the first roller group and the second roller group to move synchronously. The traction rubber roller group drags the film to the first roller group, and then drags the film to the second roller group through the feeding rubber roller group, and then drags the film to the tension control unit. The first roller group comprises two first rollers arranged in parallel, and the second roller group comprises two second rollers arranged in parallel. A punching frame is arranged between the first roller group and the feeding rubber roller group, and a puncher is arranged on the punching frame.

2. The feeding mechanism of claim 1, wherein: The tension control unit comprises a fixed roller group, the fixed roller group is fixed on the machine frame, a tension control arm is arranged on the side surface of the fixed roller group, one end of the tension control arm is hinged to the machine frame, a movable roller group is arranged on the tension control arm, the tension control arm is driven to rotate around the hinge point, the tension control arm is driven to move close to or away from the fixed roller group, and the movable roller group moves synchronously.

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