Pneumatic brake mechanism for film feeding of film coating machine

Abstract

The utility model discloses a pneumatic type brake mechanism for film feeding of a film coating machine, which comprises a film feeding roller, a gravity rod assembly and a film guide roller assembly which are arranged on a rack, the film feeding roller is rotatably connected to the rack through a driving assembly, a gravity rod is connected to the rack in a vertically sliding manner, a rolled film is arranged on the film feeding roller, and the gravity rod assembly is connected to the rack through the gravity rod assembly. The front end of a rolled film penetrates through the gravity rod and is pulled forwards through the film guiding roller assembly, a braking part is arranged on the film feeding roller, and rotation or braking of the film feeding roller is achieved through clutch connection of the pneumatic braking assembly and the braking part; the pneumatic brake assembly is arranged and comprises the air cylinder, the first brake block and the second brake block, when the film feeding roller needs to be braked, the second brake block only needs to abut against the first brake block through the air cylinder, and control is more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging equipment, and particularly relates to a pneumatic braking mechanism for film feeding of a film wrapping machine. Background Technique

[0002] The existing film feeding mechanism of the film wrapping machine on the market includes a film feeding roller. The film feeding roller continuously rotates to achieve the film feeding action. When the set single-section film length is reached, the film feeding roller is braked through a braking structure. After the film required for a single workpiece is cut, the front end of the film is stretched. At this time, the braking structure releases the brake, and so on in a cycle to achieve the effect of quantitative film feeding. Most of the existing braking structures on the market use an elastic brake strip connected to the film feeding roller. When braking, the film feeding roller is braked by tightening the elastic brake strip. However, the defect of this structure is that for films of different specifications, different tensions are required for braking. At this time, it is easy to cause inconsistent single-section film lengths and insufficient accuracy during film feeding. Content of the Utility Model

[0003] Aiming at the problems mentioned in the background technique, the purpose of the utility model is to provide a pneumatic braking mechanism for film feeding of a film wrapping machine to solve the problems existing in the above background technique.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions:

[0005] The pneumatic braking mechanism for film feeding of a film wrapping machine includes a film feeding roller arranged on a frame, a gravity rod assembly, and a film guiding roller assembly. The film feeding roller is rotatably connected to the frame through a driving assembly. The gravity rod is slidably connected to the frame up and down. The wound film is placed on the film feeding roller. The front end of the wound film passes through the gravity rod and is pulled forward through the film guiding roller assembly. It further includes a pneumatic braking assembly, and a braking part is arranged on the film feeding roller. The rotation or braking of the film feeding roller is realized through the clutch connection between the pneumatic braking assembly and the braking part.

[0006] Preferably, the film feeding roller includes a roller main body. The roller main body is connected to the frame through a bearing, and a driving motor is connected to the rear end of the roller main body. The braking part includes a first brake block arranged on the roller main body. The pneumatic braking assembly includes a cylinder, and a second brake block matching the first brake block is arranged on the piston rod of the cylinder; the second brake block is in clutch connection with the first brake block through the cylinder.

[0007] Preferably, the first brake block is of a columnar structure, and the butt joint surface between the second brake block and the first brake block forms a concave arc surface. The setting of the concave arc surface makes the braking more stable.

[0008] Preferably, a slide rail is arranged on the frame, and the gravity rod is connected to the slide rail through a slider.

[0009] Preferably, sensors are provided at the bottom end and the top side of the slide rail. The film guiding roller assembly is a prior art and will not be elaborated here.

[0010] When feeding the lower film, the front end of the film is subjected to a pulling force under the action of the film guiding assembly, and the gravity rod is lifted. When the set film feeding length is reached, after the pulling force at the front end of the film is eliminated, the gravity rod drops. When the sensor senses the dropping gravity rod, the pneumatic brake assembly brakes the film rotating wheel, and so on, to complete the film feeding action of the set length.

[0011] In summary, the present utility model mainly has the following beneficial effects:

[0012] This application is provided with a pneumatic braking assembly, including a cylinder, a first brake block and a second brake block. When it is necessary to brake the film feeding roller, it is only necessary to use the cylinder to press the second brake block against the first brake block, and the control is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is Figure 1 a schematic structural diagram in another direction;

[0015] Figure 3 is a schematic partial structural diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Embodiment 1

[0017] Referring to Figures 1 to 3 , the pneumatic braking mechanism for film feeding of the film wrapping machine described in this embodiment includes a film feeding roller 1 arranged on a frame 100, a gravity rod assembly 2, and a film guiding roller assembly 3. The film feeding roller is rotatably connected to the frame through a driving assembly. The gravity rod is slidably connected to the frame. The wound film is placed on the film feeding roller. The front end of the wound film passes through the gravity rod and is pulled forward through the film guiding roller assembly. It further includes a pneumatic braking assembly 4, and a braking part 5 is arranged on the film feeding roller. The rotation or braking of the film feeding roller is realized through the clutch connection between the pneumatic braking assembly and the braking part.

[0018] Specifically, the film feeding roller includes a roller main body 5. The roller main body is connected to the frame through a bearing, and a driving motor (the structure here is a prior art and will not be elaborated here) is connected to the rear end of the roller main body. The braking part includes a first brake block 6 arranged on the roller main body. The pneumatic braking assembly includes a cylinder 7, and a second brake block 8 matching the first brake block is arranged on the piston rod of the cylinder; the second brake block is in clutch connection with the first brake block through the cylinder.

[0019] In this embodiment, the first brake block is of a cylindrical structure, and the butt joint surface between the second brake block and the first brake block forms a concave arc surface 9. The setting of the concave arc surface makes the stability better during braking.

[0020] In this embodiment, a slide rail 10 is arranged on the frame. The gravity rod is connected to the slide rail through a slider 11, and sensors 12 are arranged at the bottom end and the side of the top end of the slide rail. The film guiding roller assembly is a prior art and will not be described in detail herein.

[0021] When feeding the lower film, the front end of the film is subjected to a pulling force under the action of the film guiding assembly, and the gravity rod is lifted. When the set film feeding length is reached, after the pulling force at the front end of the film is eliminated, the gravity rod drops. When the sensor senses the dropping gravity rod, the pneumatic brake assembly brakes the film rotating wheel, and so on, to complete the film feeding action of the set length.

[0022] In this embodiment, two sets of film feeding rollers 1 are provided for convenient replacement and use.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The pneumatic brake mechanism for film feeding of the film coating machine is characterized by: It includes a film feeding roller, a gravity rod assembly, and a film guide roller assembly arranged on a frame. The film feeding roller is rotatably connected to the frame through a driving assembly, and the gravity rod is slidably connected to the frame up and down. The rolled film is placed on the film feeding roller, and the front end of the rolled film passes through the gravity rod and is pulled forward by the film guide roller assembly. It also includes a pneumatic brake assembly, and a brake part is arranged on the film feeding roller. The rotation or braking of the film feeding roller is achieved by the clutch connection between the pneumatic brake assembly and the brake part.

2. The pneumatic brake mechanism for film feeding of a film coating machine according to claim 1, characterized in that: The film feeding roller includes a roller body, which is connected to the frame through a bearing, and a driving motor is connected to the rear end of the roller body. The braking part includes a first brake block arranged on the roller body, and the pneumatic brake assembly includes a cylinder, and a second brake block matching the first brake block is arranged on the piston rod of the cylinder; the second brake block is connected to the first brake block through the cylinder.

3. The pneumatic brake mechanism for film feeding of a film coating machine according to claim 1, characterized in that: The first brake block is a columnar structure, and the butt joint surface between the second brake block and the first brake block forms a concave arc surface. The setting of the concave arc surface improves the stability during braking.

4. The pneumatic brake mechanism for film feeding of a film coating machine according to claim 1, characterized in that: The frame is provided with a slide rail, and the gravity rod is connected to the slide rail through a sliding block.

5. The pneumatic brake mechanism for film feeding of a coating machine according to claim 1, characterized in that: Sensors are arranged on the bottom end and the top end side of the slide rail.

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