Automatic film feeding and breaking device

Abstract

The utility model relates to the technical field of packaging, in particular to an automatic film feeding and breaking device which comprises a rack, a mounting shaft seat is arranged on the rack, a bearing rod is arranged on the mounting shaft seat, and a first transmission part, a second transmission part and a third transmission part are rotationally arranged on the bearing rod. A first clamping arm is arranged on the first transmission part, a second clamping arm is arranged on the second transmission part, a film breaking arm is arranged on the third transmission part, and the film breaking arm is located on the side close to an object to be packaged. The first transmission part is connected with a first driving part; the second transmission part is connected with a second driving part; the third transmission part is connected with a third driving part; when the first clamping arm and the second clamping arm are simultaneously located at the horizontal position or the vertical position, the inner sides of the first clamping arm and the second clamping arm are in extrusion contact. The automatic film feeding and breaking device is simple and compact in overall structure and small in occupied space; in the film winding process, the first clamping arm, the second clamping arm and the film breaking arm are all located at the horizontal position and lower than the paper roll film winding position, the film hanging phenomenon is avoided, and the paper roll packaging quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to an automatic film cutting device. Background Art

[0002] In the papermaking industry, kraft paper or LLDPE stretch film is usually used to package paper rolls. When LLDPE stretch film is used for packaging, online wrapping and automatic film cutting are often used. Chinese patent CN216636921U discloses a large-scale, high-efficiency rocker arm wrapping packaging equipment, including a gantry, a rotary rocker arm component, a film frame lifting component, and an automatic film cutting component. The automatic film cutting component includes a frame, and a film cutting device and a film clamping device are provided in the frame. The film clamping device is connected to the output end of the second cylinder installed on the frame, and the film cutting device is connected to the output end of the first cylinder installed on the frame. After the entire cargo is evenly attached with one or two layers of film, the second cylinder pushes the film clamping device so that the clamping plate on the film clamping device clamps the film layer wrapped around the surface of the cargo, and the first cylinder is used to push the film cutting device, first melt the film layer, and then weld the broken film to the surface of the cargo.

[0003] However, most of the paper roll transport equipment in the papermaking industry is installed on the ground. The diameter of the paper rolls ranges from 600mm to 2000mm. When the paper rolls with smaller diameters are wrapped online, the lowest point of the film frame of the wrapping equipment is close to the ground. The existing automatic film-cutting parts have a complex structure and occupy a large space. Film is easily stuck during wrapping, which affects the packaging quality of the paper rolls. Utility Model Content

[0004] In view of the technical problems that the existing automatic film cutting components have complex structures, occupy a large space, and are prone to film hanging, the utility model provides an automatic film cutting device, including a frame, a mounting shaft seat is provided on the frame, a bearing rod is provided on the mounting shaft seat, a first transmission member, a second transmission member and a third transmission member are rotatably provided on the bearing rod; a first clamping arm is provided on the first transmission member, a second clamping arm is provided on the second transmission member, and a film cutting arm is provided on the third transmission member, and the film cutting arm is located on a side close to the article to be packaged; the first transmission member is connected to a first driving member, and the first driving member can drive the third transmission member to move the film cutting arm. A transmission member rotates and drives the first clamping arm to switch between a horizontal position, a vertical position and a release position between the horizontal position and the vertical position; the second transmission member is connected to a second driving member, which can drive the second transmission member to rotate and drive the second clamping arm to switch between a horizontal position and a vertical position; the third transmission member is connected to a third driving member, which can drive the second transmission member to rotate and drive the film cutting arm to switch between a horizontal position and a vertical position; when the first clamping arm and the second clamping arm are in a horizontal position or a vertical position at the same time, the first clamping arm is in squeeze contact with the inner side of the second clamping arm.

[0005] Furthermore, the first driving member is a first cylinder, the tail of the first cylinder is hinged to the frame, the piston rod of the first cylinder is hinged to one end of the first transmission member, the other end of the first transmission member is fixedly connected to the first clamping arm, and the first cylinder is a multi-position cylinder; the second driving member is a second cylinder, the tail of the second cylinder is hinged to the frame, the piston rod of the second cylinder is hinged to one end of the second transmission member, and the other end of the second transmission member is fixedly connected to the second clamping arm; the third driving member is a third cylinder, the tail of the third cylinder is hinged to the frame, the piston rod of the third cylinder is hinged to one end of the third transmission member, and the other end of the third transmission member is fixedly connected to the film breaking arm.

[0006] Furthermore, the mounting shaft seat is located in the middle of the frame, ear-type supports are provided at both ends of the frame, and the tails of the first cylinder, the second cylinder and the third cylinder are hinged to the ear-type supports, further reducing the space occupied by the automatic film cutting device.

[0007] Furthermore, the inner edges and corners of the first clamping arm and the second clamping arm are rounded to reduce the risk of damage to the stretch film.

[0008] Furthermore, elastic members are provided inside the first clamping arm and the second clamping arm to prevent the stretch film from sliding out from between the first clamping arm and the second clamping arm when a force is applied.

[0009] Furthermore, the film cutting arm includes a support frame, on which a blade is arranged, and the blade is detachable for easy maintenance.

[0010] Furthermore, one side of the blade cutting the film is serrated, which is more conducive to cutting the stretch film.

[0011] The beneficial effects of the utility model are:

[0012] The utility model provides an automatic film cutting device, in which a first clamping arm for clamping a stretched film, a second clamping arm and a film cutting arm for cutting the film are coaxially arranged, and the overall structure is simple and compact, and occupies a small space; during the film wrapping process, the first clamping arm, the second clamping arm and the film cutting arm are all in a horizontal position, which is lower than the film wrapping position of the paper roll, thereby avoiding film hanging and ensuring the quality of paper roll packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the utility model.

[0015] Figure 2 This is the front view of Example 1 of the utility model.

[0016] Figure 3 It is a top view of embodiment 1 of the utility model.

[0017] Figure 4 This is a top view of the vertical clamping membrane of Example 1 of the utility model.

[0018] Figure 5 This is a right side view of Example 1 of the utility model when cutting film.

[0019] In the figure: 1, frame; 2, mounting shaft seat; 3, bearing rod; 4, first clamping arm; 5, second clamping arm; 6, film cutting arm; 61, support frame; 62, blade; 71, first cylinder; 72, first transmission member; 81, second cylinder; 82, second transmission member; 91, third cylinder; 92, third transmission member; 10, ear support; 11, elastic member; 12, paper roll; 13, driving roller. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] Example 1

[0022] like Figure 1-3 As shown, an automatic film cutting device includes a frame 1, a mounting shaft seat 2 is arranged in the middle of the frame 1, and ear-type supports 10 are arranged at both ends of the frame 1.

[0023] A bearing rod 3 is arranged on the mounting shaft seat, and a first transmission member 72, a second transmission member 82 and a third transmission member 92 are rotatably arranged on the bearing rod 3; a first clamping arm 4 is arranged on the first transmission member 72, a second clamping arm 5 is arranged on the second transmission member 82, and a film cutting arm 6 is arranged on the third transmission member 92, and the film cutting arm 6 is located on the side close to the article to be packaged.

[0024] The first transmission member 72 is connected to the first cylinder 71, the tail of the first cylinder 71 is hinged to the ear-type support 10 on the right side, the piston rod of the first cylinder 71 is hinged to one end of the first transmission member 72, and the other end of the first transmission member 72 is fixedly connected to the first clamping arm 4. The first cylinder 71 is a multi-position cylinder, and the piston rod of the first cylinder 71 is selectively in the horizontal clamping position, the vertical clamping position and the release position, driving the first transmission member 72 to rotate, and driving the first clamping arm 4 to rotate to the horizontal position, the vertical position and the release position between the horizontal position and the vertical position.

[0025] The second transmission member 82 is connected to the second cylinder 81, the tail of the second cylinder 81 is hinged to the left ear-type support 10, the piston rod of the second cylinder 81 is hinged to one end of the second transmission member 82, and the other end of the second transmission member 82 is fixedly connected to the second clamping arm 5. The piston rod of the second cylinder 81 is selectively in the horizontal clamping position and the vertical clamping position, driving the second transmission member 82 to rotate, and driving the second clamping arm 5 to rotate to the horizontal position and the vertical position. When the first clamping arm 4 and the second clamping arm 5 are in the horizontal position or the vertical position at the same time, the first clamping arm 4 is in compression contact with the inner side of the second clamping arm 5.

[0026] The third transmission member 92 is connected to the third cylinder 91, the tail of the third cylinder 91 is hinged to the left ear-type support 10, the piston rod of the third cylinder 91 is hinged to one end of the third transmission member 92, and the other end of the third transmission member 92 is fixedly connected to the film cutting arm 6. The piston rod of the third cylinder 91 is selectively in the storage position and the film cutting position, driving the third transmission member 92 to rotate, and driving the film cutting arm 6 to rotate to the horizontal position and the vertical position.

[0027] The inner corners of the first clamp arm 4 and the second clamp arm 5 are rounded, and an elastic member 11 is provided inside the first clamp arm 4 and the second clamp arm 5. The elastic member 11 in this embodiment is a rubber sheet. The film cutting arm 6 includes a support frame 61, and a blade 62 is detachably provided on the support frame 61. In this embodiment, the support frame 61 and the blade 62 are connected by screws, and the side of the blade 62 that cuts the film is serrated.

[0028] Working principle:

[0029] like Figure 1-5 As shown, the paper roll 12 is placed sideways on the paper roll transport track. After being transported to the packaging station, the driving roller 13 rises, the paper roll 12 is separated from the paper roll transport track, and its side surface is against the driving roller 13. The automatic film cutting device is located outside the driving roller 13. Before the film wrapping begins, the automatic film cutting device is in a horizontal film clamping state. At this time, the piston rod of the first cylinder 71 and the piston rod of the second cylinder 81 move to the horizontal clamping position, and the piston rod of the third cylinder 91 moves to the storage position. The first clamp arm 4, the second clamp arm 5 and the film cutting arm 6 are all in a horizontal position and are all lower than the paper roll film wrapping position. The first clamp arm 4 and the second clamp arm 5 clamp the free end of the stretch film.

[0030] When wrapping the film, the automatic film cutting device cooperates with the film wrapping device to pull out the stretch film and cover it on the paper roll 12 to achieve film wrapping. After wrapping one circle of film, the driving roller 13 rotates, driving the paper roll 12 to rotate around the central axis, and the piston rod of the first cylinder 71 moves to the release position, driving the first clamping arm 4 to rotate to the release position, and releasing the free end of the stretch film. The driving roller 13 continues to drive the paper roll 12 to rotate, so that the entire paper roll 12 is evenly covered with multiple layers of stretch film. When winding to the last circle, the piston rod of the first cylinder 71 moves to the vertical clamping position, and drives the first clamping arm 4 to rotate to the vertical position through the first transmission member 72. After the stretch film bypasses the first clamping arm 4, the piston rod of the second cylinder 81 moves to the vertical clamping position, and drives the second clamping arm 5 to rotate to the vertical position through the second transmission member 82. The first clamping arm 4 and the second clamping arm 5 clamp the stretch film to achieve vertical film clamping; then the piston rod of the third cylinder 91 moves to the film cutting position, and drives the film cutting arm 6 to rotate to the vertical position through the third transmission member 92. The blade 62 cuts the stretch film to achieve film cutting. After the film cutting is completed, the piston rods of the first cylinder 71 and the second cylinder 81 move synchronously to the horizontal clamping position, and the first clamping arm 4 and the second clamping arm 5 are both rotated to the horizontal position and clamp the free end of the stretch film; the piston rod of the third cylinder 91 moves to the storage position, and the film cutting arm 6 rotates to the horizontal position. After the film is cut, the driving roller 13 rotates slowly, driving the paper roll 12 to continue rotating around the central axis, and utilizing the deadweight of the paper roll 12 and the viscosity of the stretch film to make the film tail of the stretch film stick to the outer side of the packaging of the paper roll 12.

[0031] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. An automatic film cutting device, comprising a frame, characterized in that: The frame is provided with a mounting shaft seat, the mounting shaft seat is provided with a bearing rod, and a first transmission member, a second transmission member and a third transmission member are rotatably provided on the bearing rod; a first clamping arm is provided on the first transmission member, a second clamping arm is provided on the second transmission member, and a film-breaking arm is provided on the third transmission member, and the film-breaking arm is located on a side close to the article to be packaged; the first transmission member is connected to a first driving member, and the first driving member can drive the first transmission member to rotate and drive the first clamping arm to switch between a horizontal position, a vertical position and a release position between the horizontal position and the vertical position; the second transmission member is connected to a second driving member, and the second driving member can drive the second transmission member to rotate and drive the second clamping arm to switch between the horizontal position and the vertical position; the third transmission member is connected to a third driving member, and the third driving member can drive the second transmission member to rotate and drive the film-breaking arm to switch between the horizontal position and the vertical position; when the first clamping arm and the second clamping arm are in the horizontal position or the vertical position at the same time, the first clamping arm is in extrusion contact with the inner side of the second clamping arm.

2. The automatic film cutting device according to claim 1, characterized in that: The first driving member is a first cylinder, the tail of the first cylinder is hinged to the frame, the piston rod of the first cylinder is hinged to one end of the first transmission member, and the other end of the first transmission member is fixedly connected to the first clamping arm, and the first cylinder is a multi-position cylinder; the second driving member is a second cylinder, the tail of the second cylinder is hinged to the frame, the piston rod of the second cylinder is hinged to one end of the second transmission member, and the other end of the second transmission member is fixedly connected to the second clamping arm; the third driving member is a third cylinder, the tail of the third cylinder is hinged to the frame, the piston rod of the third cylinder is hinged to one end of the third transmission member, and the other end of the third transmission member is fixedly connected to the film breaking arm.

3. An automatic film cutting device as claimed in claim 2, characterized in that: The mounting shaft seat is located in the middle of the frame, ear-type supports are arranged at both ends of the frame, and the tails of the first cylinder, the second cylinder and the third cylinder are all hinged to the ear-type supports.

4. The automatic film cutting device according to claim 1, characterized in that: The inner corners of the first clamping arm and the second clamping arm are rounded.

5. The automatic film cutting device according to claim 1, characterized in that: An elastic member is disposed inside the first clamping arm and the second clamping arm.

6. The automatic film cutting device according to claim 1, characterized in that: The film cutting arm comprises a supporting frame, on which a blade is arranged, and the blade is detachable.

7. An automatic film cutting device as claimed in claim 6, characterized in that: The side of the blade that cuts the film is serrated.

Images