Plastic packaging film cutting device

Abstract

The utility model discloses a plastic packaging film cutting device, which belongs to the technical field of plastic packaging film cutting, and comprises a base and a cutting assembly arranged on the base, the cutting assembly comprises a bracket, two fixing strips, a pressing piece, a pushing and propping plate and a cutting knife, the bracket is fixedly connected with the base, the two fixing strips are oppositely and fixedly arranged on the bracket, and the pressing piece is fixedly arranged on the bracket. The two pressing pieces are rotatably arranged on the fixing strips respectively, elastic pieces are arranged between the pressing pieces and the fixing strips, each pressing piece comprises a bearing plate and a pressing plate which are connected with each other, the pushing and abutting plate is movably installed on the support in the longitudinal direction, the bottom of the pushing and abutting plate can push and abut against the bearing plate, and the pressing plates are movably installed on the support in the longitudinal direction. The pressing plate rotates and descends under the action of the pressing piece, the plastic packaging film is pressed on the base, and the cutting knife movably penetrates through the pushing and abutting plate in the longitudinal direction. According to the plastic packaging film cutting device, the plastic packaging film is fixed in a rotary extrusion mode, when the plastic packaging film is cut, the plastic packaging film is straightened and tightened, the success rate of cutting the plastic packaging film by the cutting knife is greatly improved, and the processing progress is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to plastic package film cutting technical field, in particular, relate to a plastic package film cutting device. BACKGROUND

[0002] Plastic package film is a kind of plastic packaging material made of polyethylene or polypropylene synthetic resin, has the advantages such as waterproof, moisture-proof, dustproof, is mainly used in insurance packaging, stationery and book packaging, medicine packaging or mailing packaging and so on use occasion.Plastic package film is usually cut by production factory after processing to meet the use needs.

[0003] The Chinese patent document with publication number CN219602864U discloses a plastic package film cutting device, comprising a case, a film pushing roller is rotatably arranged on the case, a cutting mechanism and a driving assembly for driving the cutting mechanism to move are further arranged on one side of the film pushing roller on the case, the cutting mechanism comprises a movable plate, a cutting knife is arranged at the center of the lower surface of the movable plate, a groove is opened on the case corresponding to the cutting knife, pressure plates are movably arranged on the opposite sides of the cutting knife on the movable plate along the longitudinal direction, compression springs are arranged between the pressure plates and the movable plate, the driving assembly comprises a rotating disc rotatably arranged on the case, a sliding column slidably arranged on the case along the longitudinal direction and a connecting rod hingedly connected between the rotating disc and the sliding column, the sliding column is fixedly connected with the movable plate, the above-mentioned patent document records the technical scheme, ensures timely cutting, and the pressure plates on the two sides of the cutting knife firstly extrude and fix the plastic package film on the case, the fixing of the plastic package film is more reliable, and the cutting precision is ensured.

[0004] However, the inventor found that before the cutting knife cuts the plastic package film, although the pressure plates on the two sides of the cutting knife extrude and fix the plastic package film on the case, the cutting knife cannot cut the plastic package film at one time because the cutting part of the plastic package film is not in a tight state, thereby affecting the processing progress when the above-mentioned plastic package film cutting device is put into production. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is that in the prior art, the cutting part of the plastic package film is prone to cutting failure due to not being in a tight state, therefore, the utility model provides a plastic package film cutting device capable of improving cutting success rate.

[0006] The utility model discloses a technical scheme that solves its technical problem is: a plastic package film cutting device, including base and install cutting assembly on the base, the cutting assembly includes support, fixed strip, compression piece, push against board and cutting knife, the support with fixed connection of base, the fixed strip has two and opposite fixed installation on the support, the compression piece has two and respectively rotatablely located on the fixed strip, be equipped with elastic member between the compression piece with the fixed strip, the compression piece includes pressure plate and compression plate that connect each other, push against board movable installation on the support along the longitudinal, push against board bottom can push against pressure plate, to make the compression plate descend plastic package film compression in on the base under the rotation of compression piece, cutting knife movablely passes through push against board along the longitudinal.

[0007] Further, two compression pieces are symmetrically located on opposite sides of the push against board, and the compression plates are inclined from top to bottom towards the push against board.

[0008] Further, one side of the compression plate away from the pressure plate is provided as an arc surface structure.

[0009] Further, the elastic member is a tension spring, one end of the tension spring is connected with the fixed strip, and the other end of the tension spring is connected with the pressure plate.

[0010] Further, a limiting block is fixedly arranged on the fixed strip, and the limiting block can abut against the upper surface of the pressure plate.

[0011] Further, the opposite sides of the lower end of the push against board are provided as a round corner structure.

[0012] Further, a through groove is formed on the push against board and passes through the upper and lower surfaces of the push against board, and the cutting knife is slidably penetrated through the through groove along the longitudinal direction.

[0013] Further, the plastic package film cutting device further comprises a push against board driving member for driving the push against board to move and a cutting knife driving member for driving the cutting knife to move.

[0014] Further, the support is in a flat plate structure and is perpendicular to the upper surface of the base, a sliding groove is formed on the support along the longitudinal direction, the push against board driving member and the cutting knife driving member are arranged on the same side of the support, the push against board and the cutting knife are arranged on the other side of the support, a first connecting rod is fixedly connected to the driving end of the push against board driving member, the first connecting rod is fixedly connected to the push against board after penetrating through the sliding groove, a second connecting rod is fixedly connected to the driving end of the cutting knife driving member, the second connecting rod is fixedly connected to the cutting knife after penetrating through the sliding groove, and the first connecting rod and the second connecting rod can slide along the length direction of the sliding groove.

[0015] Further, the plastic packaging film cutting device further comprises a unwinding roller and a film feeding roller, the unwinding roller and the film feeding roller are rotatably installed on the base, and the film feeding roller is located between the unwinding roller and the cutting assembly.

[0016] The plastic packaging film cutting device has the advantages that, compared with the prior art which fixes the plastic packaging film in a longitudinal direction by a pressing plate, the pressing plate fixes the plastic packaging film in a rotary pressing manner, the plastic packaging film is straightened and tightened when cutting the plastic packaging film, the success rate of cutting the plastic packaging film by the cutting knife is greatly improved, the processing process is improved, and the economic benefit of an enterprise is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described below in combination with the drawings and examples.

[0018] Figure 1 It is the perspective view of the plastic packaging film cutting device of the utility model;

[0019] Figure 2 It is Figure 1 It is the partial close-up view of A in the plastic packaging film cutting device shown in the figure;

[0020] Figure 3 It is Figure 1 It is the perspective view of another angle of the plastic packaging film cutting device shown in the figure;

[0021] Figure 4 It is Figure 1 It is the front view of the plastic packaging film cutting device shown in the figure;

[0022] Figure 5 It is Figure 4 It is the partial close-up view of B in the plastic packaging film cutting device shown in the figure.

[0023] In the figure: 1, base, 11, support plate, 12, fixed plate, 13, drive motor, 14, groove, 2, unwinding roller, 3, film feeding roller, 4, cutting assembly, 41, support, 411, sliding groove, 42, fixed strip, 421, limiting block, 43, pressing element, 431, pressure receiving plate, 432, pressing plate, 44, pushing plate, 441, through slot, 45, cutting knife, 46, elastic element, 5, plastic packaging film, 6, pushing plate driving element, 61, first connecting rod, 7, cutting knife driving element, 71, second connecting rod. DETAILED DESCRIPTION

[0024] The utility model will be further described below in combination with the drawings and examples.

[0025] Please refer to Figures 1-5The utility model provides a kind of plastic envelope membrane cutting device, including pedestal 1 and the unwinding roller 2 of installation on pedestal 1, membrane feeding roller 3 and cutting assembly 4, unwinding roller 2 rotatably installed in one side of pedestal 1, unwinding roller 2 is used to release plastic envelope membrane 5, membrane feeding roller 3 rotatably installed on pedestal 1, and located between unwinding roller 2 and cutting assembly 4, membrane feeding roller 3 is used to drive plastic envelope membrane 5 movement, specifically, plastic envelope membrane 5 is extruded on the upper surface of pedestal 1 by membrane feeding roller 4, with the rotation of membrane feeding roller 3, under the action of friction, can drive membrane feeding roller 4 to move, to make plastic envelope membrane 5 gradually be released from unwinding roller 2, cutting assembly 4 is used to cut plastic envelope membrane 5.

[0026] The upper surface of pedestal 1 is vertically fixedly installed with support plate 11 on opposite sides, unwinding roller 2 is rotatably installed between two support plates 11, and plastic envelope membrane 5 is wound on unwinding roller 2.

[0027] In addition, fixed plate 12 is fixedly installed on the upper surface of pedestal 1 on one side of support plate 11, and membrane feeding roller 3 is rotatably installed on fixed plate 12. In order to facilitate the rotation of membrane feeding roller 3, drive motor 13 is fixedly installed on fixed plate 12, one end of membrane feeding roller 3 is fixedly connected with the output shaft of drive motor 13, so that membrane feeding roller 3 can be driven to rotate when drive motor 13 is started. The lowest part of membrane feeding roller 3 and the upper surface of pedestal 1 leave a gap, which is used for plastic envelope membrane 5 to pass through.

[0028] Cutting assembly 4 includes bracket 41, fixed strip 42, compression piece 43, push plate 44 and cutting knife 45, bracket 41 is fixedly connected with pedestal 1, fixed strip 42 has two and is fixedly installed on bracket 41, compression piece 43 has two and is rotatably installed on fixed strip 42 respectively, elastic element 46 is arranged between compression piece 43 and fixed strip 42, compression piece 43 includes pressure receiving plate 431 and compression plate 432 connected with each other, push plate 44 is movably installed on bracket 41 along the longitudinal direction, the bottom of push plate 44 can push pressure receiving plate 431, so that compression plate 432 compresses plastic envelope membrane 5 on pedestal 1 under the rotation of compression piece 43, cutting knife 45 penetrates push plate 44 along the longitudinal direction. In addition, recess 14 is formed on the upper surface of pedestal 1, and recess 14 corresponds to cutting knife 45. When cutting, the cutting edge of cutting knife 45 cuts plastic envelope membrane 5 and then extends into recess 14.

[0029] The plastic sealing film cutting device, when the initial state, that is, when the push plate 44 is separated from the pressure plate 431, the pressing plate 432 is kept separated from the upper surface of the base 1 under the action of the elastic element 46, at this time, the gap formed between the pressing plate 432 and the base 1 can be used for the plastic sealing film 5 to pass through, so as to meet the normal unwinding operation. When the plastic sealing film 5 is released to the length required by the user, the film feeding roller 3 stops rotating, and the plastic sealing film 5 stops moving, at this time, the push plate 44 moves downward, and the push plate 44 pushes the pressure plate 431 downward at the same time, so that the pressing elements 43 on the two sides rotate synchronously, and the pressing plates 432 on the two sides are deflected in opposite directions, so that the pressing plate 432 extrudes the plastic sealing film 5 on the upper surface of the base 1, and at the same time, the pressing plate 432 has a pulling effect on the plastic sealing film 5 when deflected, so that the plastic sealing film 5 is fixed by the pressing plate 432 and is also pulled tight. After the plastic sealing film 5 is fixed and pressed, the cutting knife 45 moves downward, so as to cut the part of the plastic sealing film 5 fixed between the two pressing plates 432.

[0030] Compared with the way of fixing the plastic sealing film by extruding the plastic sealing film in the longitudinal direction through the pressing plate in the prior art, the plastic sealing film 5 is fixed by the rotating extrusion of the pressing plate 432 in the utility model, and when the plastic sealing film 5 is cut, the plastic sealing film 5 is straightened and tightened, which greatly improves the success rate of cutting the plastic sealing film 5 by the cutting knife 45, improves the processing progress, and helps enterprises to improve economic benefits.

[0031] In the embodiment, the two pressing elements 43 are symmetrically located on the opposite sides of the push plate 44, and the pressing plate 432 is inclined from top to bottom to the direction close to the push plate 44, so that when the push plate 44 moves downward and pushes the two pressure plates 431 at the same time, the pressing plate 432 on the left side of the push plate 44 rotates clockwise, and the pressing plate 432 on the right side of the push plate 44 rotates counterclockwise, so that the part to be cut on the plastic sealing film 5 is pulled straight to the two sides.

[0032] Further, one side of the pressing plate 432 away from the pressure plate 44 is provided with an arc surface structure, and the arc surface structure is used to press the plastic sealing film 5 when the pressing plate 432 rotates, and the arc surface structure can reduce the serious scratching of the upper surface of the plastic sealing film 5 caused by the pressing plate 432 when pressing the plastic sealing film 5, reduce the wear of the plastic sealing film 5, and ensure the cutting quality of the plastic sealing film 5.

[0033] As a preferred embodiment, the elastic member 46 is a tension spring, one end of which is connected with the fixed strip 42 and the other end of which is connected with the pressure plate 431. When the push plate 44 has not pushed against the pressure plate 431, the pressing plate 432 on the pressing member 43 is kept separated from the plastic sealing film 5 under the elastic force of the tension spring, and the plastic sealing film 5 can move below the pressing plate 432. When the push plate 44 is moved downward to push against the pressing member 43 to rotate, the tension spring is stretched, and when the push plate 44 is moved upward, the pressing member 43 is reset under the elastic force of the tension spring.

[0034] Further, the fixed strip 42 is fixedly provided with a limiting block 421, which can abut against the upper surface of the pressure plate 431. When the push plate 44 has not pushed against the pressure plate 431, the pressure plate 431 abuts against the limiting block 421 under the elastic force of the elastic member 46, thereby limiting the pressing member 43. In a specific embodiment, when the upper surface of the pressure plate 431 abuts against the lower surface of the limiting block 421, the upper surface of the pressure plate 431 is in a horizontal state, that is, when the pressure plate 431 abuts against the limiting block 421, the two pressure plates 431 are closest to each other, and as the push plate 44 pushes against the pressure plate 431 downward, the two pressure plates 431 gradually move away from each other, thereby avoiding the interference between the two pressure plates 431 during the rotation of the pressing member 43. In addition, the fixed strip 42 and the pressure plate 431 are both fixedly connected with a mounting plate (not shown in the figure), both ends of the tension spring are connected with the mounting plate, and the mounting plate and the limiting block 421 are staggered to avoid the interference between the pressure plate 431 and the limiting block 421 during the movement of the pressure plate 431.

[0035] The opposite sides of the lower end of the push plate 44 are both provided with a rounded structure to reduce the serious abrasion of the pressure plate 431 caused by the push plate 44 when pushing against the pressure plate 431 downward.

[0036] In the embodiment, the push plate 44 is provided with a through slot 441 penetrating the upper and lower surfaces of the push plate 44, and the cutting knife 45 is longitudinally and slidably penetrated through the through slot 441.

[0037] Please refer to Figure 3The plastic packaging film cutting device further comprises a push plate driving element 6 and a cutting knife driving element 7 installed on the support 41, the push plate driving element 6 is used for driving the push plate 44 to move, and the cutting knife driving element 7 is used for driving the cutting knife 45 to move, in the embodiment, the push plate driving element 6 and the cutting knife driving element 7 are both air cylinders. As a preferred embodiment, the support 41 is in a flat plate structure and is perpendicular to the upper surface of the base 1, a sliding groove 411 is longitudinally formed on the support 41, the push plate driving element 6 and the cutting knife driving element 7 are arranged on the same side of the support 41, the push plate 44 and the cutting knife 45 are arranged on the other side of the support 41, the driving end (i.e. the extending end of the air cylinder) of the push plate driving element 6 is fixedly connected with a first connecting rod 61, the first connecting rod 61 is fixedly connected with the push plate 44 after penetrating through the sliding groove 411, the driving end (i.e. the extending end of the air cylinder) of the cutting knife driving element 7 is fixedly connected with a second connecting rod 71, the second connecting rod 71 is fixedly connected with the cutting knife 45 after penetrating through the sliding groove 411, and the first connecting rod 61 and the second connecting rod 71 can slide along the length direction of the sliding groove 411. During work, the push plate driving element 6 drives the push plate 44 to move through the first connecting rod 61, and the cutting knife driving element 7 drives the cutting knife 45 to move through the second connecting rod 71.

[0038] Compared with the mode that the plastic packaging film is fixed by the pressing plate along the longitudinal direction in the prior art, the pressing plate 432 fixes the plastic packaging film 5 in a rotary extrusion mode, the plastic packaging film 5 is straightened and tightened during cutting of the plastic packaging film 5, the success rate of cutting of the plastic packaging film 5 by the cutting knife 45 is greatly improved, the processing process is improved, and the economic benefit of the enterprise is improved.

[0039] Based on the above ideal embodiments of the utility model, through the above description, relevant personnel can make various changes and modifications without deviating from the scope of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A plastic packaging film cutting device, comprising a base and a cutting assembly mounted on the base, characterized in that: The cutting assembly comprises a support, fixed bars, pressing members, a pushing plate and a cutting knife, the support is fixedly connected with the base, the fixed bars are two and oppositely fixedly installed on the support, the pressing members are two and rotatably arranged on the fixed bars respectively, elastic members are arranged between the pressing members and the fixed bars, the pressing members comprise pressure receiving plates and pressing plates which are connected with each other, the pushing plate is movably installed on the support in the longitudinal direction, the bottom of the pushing plate can push the pressure receiving plates, so that the pressing plates are lowered under the rotation of the pressing members and press the plastic packaging film on the base, and the cutting knife is movably penetrated through the pushing plate in the longitudinal direction.

2. The plastic film cutting apparatus of claim 1, wherein: The two pressing members are symmetrically located on opposite sides of the pushing plate, and the pressing plates are arranged in a downwardly inclined manner towards the pushing plate.

3. The plastic film cutting apparatus of claim 2, wherein: The side of the pressing plate away from the pressure receiving plate is arranged in an arc surface structure.

4. The plastic film cutting apparatus of claim 1, wherein: The elastic members are tension springs, one end of the tension spring is connected with the fixed bar, and the other end of the tension spring is connected with the pressure receiving plate.

5. The plastic film cutting apparatus of claim 4, wherein: A limiting block is fixedly arranged on the fixed bar, and the limiting block can abut against the upper surface of the pressure receiving plate.

6. The plastic film cutting apparatus of claim 1, wherein: The opposite sides of the lower end of the pushing plate are arranged in a round corner structure.

7. The plastic film cutting apparatus of claim 6, wherein: A through groove is formed in the pushing plate and penetrates the upper and lower surfaces of the pushing plate, and the cutting knife is slidably penetrated through the through groove in the longitudinal direction.

8. The plastic film cutting apparatus of claim 1, wherein: The plastic packaging film cutting device further comprises a pushing plate driving member for driving the pushing plate to move and a cutting knife driving member for driving the cutting knife to move.

9. The plastic film cutting apparatus of claim 8, wherein: The support is in a flat plate structure and perpendicular to the upper surface of the base, a sliding groove is formed in the support in the longitudinal direction, the pushing plate driving member and the cutting knife driving member are arranged on the same side of the support, the pushing plate and the cutting knife are arranged on the other side of the support, a first connecting rod is fixedly connected with the driving end of the pushing plate driving member, the first connecting rod is fixedly connected with the pushing plate after penetrating through the sliding groove, a second connecting rod is fixedly connected with the driving end of the cutting knife driving member, the second connecting rod is fixedly connected with the cutting knife after penetrating through the sliding groove, and the first connecting rod and the second connecting rod can slide along the length direction of the sliding groove.

10. The plastic film cutting apparatus of claim 1, wherein: The plastic packaging film cutting device further comprises a pay-off roller and a film feeding roller, the pay-off roller and the film feeding roller are rotatably installed on the base, and the film feeding roller is located between the pay-off roller and the cutting assembly.

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