CN216548895U

CN216548895U - Plastic film segmentation device

Info

Publication number: CN216548895U
Application number: CN202122599847.4U
Authority: CN
Inventors: 孙玉兵; 桑志强
Original assignee: Chongqing Hechang Packaging Co ltd
Current assignee: Chongqing Hechang Packaging Co ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-05-17
Anticipated expiration: 2031-10-27

Abstract

The utility model relates to the field of plastic film processing, and particularly discloses a plastic film cutting device which comprises an unwinding roller, a plurality of winding rollers and a film cutting unit, wherein the unwinding roller is positioned on one side of the film cutting unit, the plurality of winding rollers are positioned on the other side of the film cutting unit, the film cutting unit comprises two support frames, a cutting pipe and a plurality of cutting knives, the cutting pipe is horizontally and fixedly arranged between the two support frames, a limiting through groove for a film to pass through is horizontally arranged on the cutting pipe, and the cutting knives are detachably arranged at the limiting through groove of the cutting pipe; the cutting pipe is internally provided with a negative pressure cavity, and the limiting through groove of the cutting pipe is provided with a plurality of negative pressure holes communicated with the negative pressure cavity. The structure of negative pressure chamber and negative pressure hole has been adopted in this scheme, and negative pressure hole department can adsorb the film for the film can all keep straight state in whole cutting process, and then the film can not appear and turn over the condition of rolling over or misplacing, can guarantee the quality and the efficiency of cutting.

Description

Plastic film segmentation device

Technical Field

The utility model relates to the technical field of plastic film processing, in particular to a plastic film cutting device.

Background

In recent years, films made of resins such as polyvinyl chloride and polyethylene are widely applied to articles for daily use such as packages, woven bags and films, and after conventional films are produced, the width of the whole film is wide, so that the film cannot be directly used for processing plastic articles such as packages, woven bags and films, and further needs to be cut.

In the process of cutting the film, the plastic film is thin, and the film is easy to shift in the moving process, so that the cutting position is staggered, and the quality of the cut film is directly influenced; meanwhile, after the cutting knife is used for a long time, the cutting edge of the cutting knife is inevitably worn, so that the cutting efficiency of the cutting edge of the film is influenced, and the synchronism of cutting and film movement is also influenced; at the moment, the cutting progress of the film needs to be interrupted, the cutting knife is disassembled, the cutting knife is replaced, the replacement efficiency of the cutting knife is low, and the cutting progress of the film can also be influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a plastic film cutting device, which aims to solve the problem that the quality of a cut film is influenced because the film is easy to turn over or misplace in the cutting process.

In order to achieve the above object, the basic scheme of the utility model is as follows: a plastic film cutting device comprises an unwinding roller, a plurality of winding rollers and a film cutting unit, wherein the unwinding roller is positioned on one side of the film cutting unit, the plurality of winding rollers are positioned on the other side of the film cutting unit, the film cutting unit comprises two support frames, a cutting pipe and a plurality of cutting knives, the cutting pipe is horizontally and fixedly installed between the two support frames, a limiting through groove for a film to pass through is horizontally arranged on the cutting pipe, the cutting knives are detachably installed at the limiting through groove of the cutting pipe, and the cutting edges of the cutting knives are perpendicular to the axis of the cutting pipe; the cutting pipe is internally provided with a negative pressure cavity, and the limiting through groove of the cutting pipe is provided with a plurality of negative pressure holes communicated with the negative pressure cavity.

The technical principle of the utility model is as follows: firstly, a film to be cut is installed on an unwinding roller, then the free end of the film passes through a limiting through groove and is installed on a winding roller, and then a cutting knife is installed at the corresponding position of the limiting through groove according to the cutting width, so that the blade of the cutting knife is opposite to the film; in the process, negative pressure in the negative pressure cavity acts on the film through the negative pressure holes, and the film can be flatly attached to the inner wall of the limiting through groove pair under the adsorption of the negative pressure holes; then the wind-up roll drives film horizontal migration, and the cutting knife can be automatically to the cutting processing of straight film this moment.

Compared with the prior art, the utility model has the following beneficial effects: the structure of the negative pressure cavity and the negative pressure hole is adopted, negative pressure can be effectively provided for the inner wall through the limiting through groove, and then the film is adsorbed, so that the film can be kept in a straight state in the whole cutting process, the situation that the film is turned over or misplaced can not occur, and the cutting quality and efficiency can be guaranteed.

Further, a cutter groove for vertically inserting a cutter is vertically arranged on the cutting pipe, the middle part of the cutter groove is communicated with the limiting through groove, the width of the cutter is smaller than the thickness of the limiting through groove, and the length of the cutting edge of the cutter is larger than the thickness of the cutter groove; the length of the cutter groove is equal to that of the limiting through groove.

Through the arrangement, the cutter groove can limit the vertical arrangement of the cutter knife, and the middle part of the cutter groove is communicated with the limiting through groove, so that the cutter knife can be opposite to the thin film, and the thin film can be cut quickly and accurately; simultaneously through the restriction to tool setting groove thickness and length, can let the cutting knife at the inslot horizontal migration, and then the interval between two steerable adjacent cutting knives, control is to the cutting width of film, the adjustment that the specification of cutting can be quick.

Further, still be provided with two fixed parts on the cutting knife, two fixed parts set up along the central plane symmetry of cutting pipe horizontal direction, and the fixed part includes screw thread post and bolt, and one side that the sword groove was passed to the one end of screw thread post is connected with the tip fixed connection of cutting knife, and the other end and the bolt threaded connection of screw thread post, the bolt can offset with the outer wall of cutting pipe.

When the cutting knife in the knife groove is limited, the bolt is in threaded connection with threaded columns at two ends of the cutting knife, and the bolt abuts against the outer wall of the cutting pipe to fix the cutting knife; when the direction of the cutting edge of the cutting knife is not over against the left side, the direction of the cutting knife can be adjusted by slightly rotating the cutting knife; simultaneously when wearing and tearing appear in the cutting part that the cutting knife was commonly used, the bolt that relaxs is located upside or downside promotes the screw thread post and slightly moves up or moves down, then screws the bolt on the opposite side again, can let the contact department change of cutting knife and film, and then can let other positions of same cutting knife continue the cutting to the film, realizes the make full use of to single cutting knife, also can effectively improve the governing speed to the cutting knife.

Further, the negative pressure machine is further included, a negative pressure pipe is arranged in the negative pressure cavity, the negative pressure holes are communicated with the negative pressure pipe, and the negative pressure machine is communicated with the negative pressure pipe.

Through the arrangement, the negative pressure machine can generate negative pressure, the negative pressure can be effectively transmitted into the negative pressure pipe, the negative pressure hole can have the adsorption force which is continuous and stable for the film, the stability of the film during transmission is obviously improved, and stable cutting can be guaranteed.

Further, the negative pressure pipe is located the cutting pipe and is close to the one side of unreeling the roller, and the sword groove is located the cutting pipe and keeps away from the one side of unreeling the roller.

Through the setting, before the film is cut, the film can keep a more stable laminating state with the limiting through groove, and the flatness degree during cutting is improved.

Further, the negative pressure pipe is located the upside of spacing logical groove.

Whether the film is in a straight state or not can be more conveniently seen by observing the film condition at the upper side of the limiting through groove, and the turnover or dislocation condition of the film can be timely found.

Furthermore, a plurality of negative pressure holes are uniformly arranged along the axial direction of the negative pressure pipe.

Through the arrangement, the adsorption force of the film can be more uniform, and a more straight state can be kept.

Drawings

Fig. 1 is a plan view of a plastic film slitting apparatus according to an embodiment of the present invention.

Fig. 2 is a front sectional view of a film cutting unit in a plastic film slitting device according to an embodiment of the present invention.

In the above drawings: the device comprises an unwinding roller 10, a winding roller 20, a support frame 30, a cutting knife 40, a threaded column 401, a bolt 402, a cutting pipe 50, a limiting through groove 501, a knife groove 502, a negative pressure cavity 503, a negative pressure pipe 60 and a negative pressure hole 601.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a plastic film cutting device, which includes an unwinding roller 10, a negative pressure machine (not shown), three winding rollers 20, and a film cutting unit, where the unwinding roller 10 is installed on the left side of the film cutting unit, and the three winding rollers 20 are installed on the right side of the film cutting unit.

As shown in fig. 1 and 2, the film cutting unit includes two support frames 30, a cutting pipe 50 and three cutting knives 40, the cutting pipe 50 is horizontally welded between the two support frames 30, a limiting through groove 501 for the film to horizontally pass through is horizontally arranged on the cutting pipe 50, a knife groove 502 for the cutting knives 40 to vertically insert is vertically arranged on the cutting pipe 50, the middle part of the knife groove 502 is communicated with the limiting through groove 501, the width of the cutting knife 40 is smaller than the thickness of the limiting through groove 501, and the length of the cutting edge of the cutting knife 40 is greater than the thickness of the knife groove 502; the length of the knife groove 502 is equal to the length of the limiting through groove 501.

Meanwhile, the cutting knife 40 is also provided with two fixing parts which are symmetrically arranged along the central plane of the cutting tube 50 in the horizontal direction, each fixing part comprises a threaded column 401 and a bolt 402, one end of each threaded column 401 penetrates through one side of the knife groove 502 to be welded with the end part of the cutting knife 40, the other end of each threaded column 401 is in threaded connection with the bolt 402, and the bolt 402 can abut against the outer wall of the cutting tube 50; after the cutting knife 40 is fixed, the cutting edge of the cutting knife 40 is perpendicular to the axis of the cutting tube 50.

Meanwhile, as shown in fig. 1 and fig. 2, a negative pressure cavity 503 is arranged in the cutting pipe 50, a negative pressure pipe 60 is nested in the negative pressure cavity 503, the outer wall of the negative pressure pipe 60 is attached to the inner wall of the negative pressure cavity 503, a plurality of negative pressure holes 601 communicated with the negative pressure cavity 503 are arranged at the position of the limiting through groove 501 of the cutting pipe 50, the negative pressure holes 601 are communicated with the negative pressure pipe 60, the negative pressure holes 601 are uniformly arranged along the axial direction of the negative pressure pipe 60, and the negative pressure pipe 60 penetrates through the lower end of the cutting pipe 50 and is communicated with a negative pressure machine; meanwhile, the negative pressure pipe 60 is located on the left side of the cutting pipe 50, the cutter groove 502 is located on the right side of the cutting pipe 50, and the negative pressure pipe 60 is located on the upper side of the limiting through groove 501.

When the plastic film cutting device in the embodiment is used, a film to be cut is firstly installed on the unwinding roller 10, then the free end of the film passes through the limiting through groove 501 and is installed on the winding roller 20, then the cutting knife 40 is installed at the corresponding position of the knife groove 502 according to the cutting width, then the bolt 402 is adopted to be in threaded connection with the threaded columns 401 at the two ends of the cutting knife 40, and the bolt 402 abuts against the outer wall of the cutting pipe 50 to fix the cutting knife 40; when the edge direction of the cutting knife 40 is not opposite to the left side, the direction of the cutting knife 40 can be adjusted by slightly rotating the cutting knife 40.

Then, a negative pressure machine is started, negative pressure is transmitted to each negative pressure hole 601 through the negative pressure pipe 60, and then the film can be adsorbed, so that the film is smoothly attached to the upper side of the limiting through groove 501, and the film is kept in a straight state; then the wind-up roll 20 rotates, the wind-up roll 20 drives the film to move rightwards, and the film is automatically cut by the cutting knife 40.

When wearing and tearing appear in the cutting part that cutting knife 40 is commonly used, the bolt 402 that relaxes and be located upside or downside promotes screw thread post 401 and slightly moves up or move down, then screws bolt 402 on the opposite side again, can let cutting knife 40 and the change of contact department of film, and then can let other positions of same cutting knife 40 continue the cutting to the film, realizes the make full use of to single cutting knife 40, also can effectively improve the governing speed to cutting knife 40.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. A plastic film cutting device comprises an unwinding roller, a plurality of winding rollers and a film cutting unit, wherein the unwinding roller is positioned on one side of the film cutting unit, and the plurality of winding rollers are positioned on the other side of the film cutting unit; the cutting pipe is internally provided with a negative pressure cavity, and the limiting through groove of the cutting pipe is provided with a plurality of negative pressure holes communicated with the negative pressure cavity.

2. The plastic film slitting device as claimed in claim 1, wherein the cutting pipe is vertically provided with a knife slot for a cutting knife to be vertically inserted, the middle part of the knife slot is communicated with the limiting through slot, the width of the cutting knife is smaller than the thickness of the limiting through slot, and the length of the cutting edge of the cutting knife is larger than the thickness of the knife slot; the length of the cutter groove is equal to that of the limiting through groove.

3. The plastic film slitting device as claimed in claim 2, wherein the cutting knife further has two fixing portions symmetrically disposed along a horizontal center plane of the cutting tube, the fixing portions include a threaded post and a bolt, one end of the threaded post is fixedly connected to the end of the cutting knife through one side of the knife slot, the other end of the threaded post is threadedly connected to the bolt, and the bolt is abutted against the outer wall of the cutting tube.

4. The plastic film slitting device according to any one of claims 1 to 3, further comprising a negative pressure machine, wherein a negative pressure pipe is arranged in the negative pressure cavity, the negative pressure holes are all communicated with the negative pressure pipe, and the negative pressure machine is communicated with the negative pressure pipe.

5. The plastic film slitting device as claimed in claim 4, wherein the negative pressure pipe is located on a side of the cutting pipe close to the unwinding roller, and the knife groove is located on a side of the cutting pipe away from the unwinding roller.

6. The apparatus for slitting plastic films according to claim 5, wherein said underpressure tube is located on the upper side of the limiting channel.

7. The apparatus for slitting plastic films according to claim 6, wherein the plurality of suction holes are uniformly arranged in the axial direction of the suction pipe.