CN114408306A

CN114408306A - Thermal shrinkage film packaging machine and corner cutting mechanism thereof

Info

Publication number: CN114408306A
Application number: CN202111521193.1A
Authority: CN
Inventors: 周道洪; 李意成; 赖武南
Original assignee: Guangdong Evenwin Precision Technology Co Ltd
Current assignee: Shenzhen Guanlian Packaging Products Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-04-29
Anticipated expiration: 2041-12-13
Also published as: CN114408306B

Abstract

The invention provides a corner cutting mechanism of a thermal shrinkage film packaging machine, which comprises: the device comprises a rack and four groups of corner cutting modules arranged at four corners of the rack. The corner cutting module comprises a corner cutting chopping block component, a corner cutting cutter component, a corner cutting reshaping component and a corner cutting module fixing plate, wherein the corner cutting reshaping component is arranged on one side of the corner cutting chopping block component, which is close to the corner cutting cutter component; the corner cutting and shaping assembly comprises a corner cutting driving device and a film clamping block fixedly connected with the driving end of the corner cutting driving device; the corner cutting driving device can drive the film clamping block to move in a first direction and a second direction which are perpendicular to each other, and the first direction is the direction in which the film clamping block is close to or far away from the corner cutting board assembly. Also provides a heat shrinkage die packaging machine comprising the corner cutting mechanism. The thermal shrinkage film packaging machine and the corner cutting mechanism thereof provided by the invention can solve the problem of uneven surface of the packaging film and improve the surface quality of packaging.

Description

Thermal shrinkage film packaging machine and corner cutting mechanism thereof

Technical Field

The invention relates to the technical field of packaging equipment, in particular to a thermal shrinkage film packaging machine and a corner cutting mechanism thereof.

Background

The heat-shrinkable film is a good film packaging material, has good transparency, can enable a user to directly see packaged commodities and is convenient for the user to select the commodities; the packaging bag can be tightly attached to the appearance of a commodity, can be suitable for packaging commodities with various shapes, and has wide packaging contents; it is excellent in theft-proof and dust-proof properties.

Along with the improvement of the positioning requirements of users on products, the external packaging requirements of the products are also continuously improved, for example, the attaching degree and the flatness of a packaging film and a product packaging box, the flatness of a cutting line, the attractiveness of the whole external packaging and the like.

Along with the requirements of people on products and outer packages of the products are higher and higher, the delicacy degree of the outer packages directly influences the good feeling of users on the products, and one exquisite package can improve the good feeling of the users on the products, enhance the competitiveness of the products in the market and improve the grade of the products. However, the prior art has the problems that the cutting precision of the heat shrink die is poor, the surface of the packaging film is not flat, the positions of four corners and cutting lines of the packaging film are not uniform, and the appearance of the product is not attractive in the packaging and film cutting processes, and the high-standard requirements of users on packaging are difficult to meet.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a heat-shrinkable film packaging machine and a corner cutting mechanism thereof so as to solve the problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that:

a corner cutting mechanism of a thermal shrinkage film packaging machine comprises: the packaging film cutting device comprises a rack and four groups of corner cutting modules arranged at four corners of the rack, wherein the four groups of corner cutting modules are used for cutting off the four corners of the packaging film;

the corner cutting module comprises a corner cutting chopping block component, a corner cutting cutter component, a corner cutting reshaping component and a corner cutting module fixing plate, wherein the corner cutting reshaping component is arranged on one side of the corner cutting chopping block component, which is close to the corner cutting cutter component; the corner cutting board assembly, the corner cutting knife assembly and the corner cutting and shaping assembly are all fixed on the corner cutting module fixing plate; the corner cutting and shaping assembly comprises a corner cutting driving device and a film clamping block fixedly connected with the driving end of the corner cutting driving device; the corner cutting driving device can drive the film clamping block to move in a first direction and a second direction which are perpendicular to each other, and the first direction is the direction in which the film clamping block is close to or far away from the corner cutting board assembly;

the packaging film to be subjected to corner cutting is positioned in the center of the frame.

The further improvement of the technical scheme is as follows:

the corner cutting board assembly comprises a corner cutting board fixed on the corner cutting module fixing plate and a material bearing platform fixed at the bottom of the corner cutting board.

The corner cutting mechanism further comprises a waste film collecting module, and the waste film collecting module comprises a first negative pressure device, a material sucking pipe communicated with the first negative pressure device, and a sucking assembly arranged on the corner cutting chopping block; the suction assembly comprises a cavity arranged inside the corner cutting board, a first opening is formed in one side, close to the film clamping block, of the corner cutting board, and a second opening is formed in the bottom of the corner cutting board; the first opening is provided with a vacuum port adjusting plate for adjusting the air volume at the first opening; the second opening is communicated with the material suction pipe.

The corner cutting driving device comprises a first air cylinder and a third air cylinder which are arranged in parallel and at intervals, a second air cylinder, a film clamping slide way and a film clamping slide block, wherein the driving direction of the second air cylinder is perpendicular to the driving direction of the first air cylinder and the driving direction of the third air cylinder; the first cylinder and the third cylinder are fixed at the bottom of the corner cutting module fixing plate, and the film clamping slide way is positioned between the first cylinder and the third cylinder; the driving end of the second air cylinder is detachably connected with the film clamping sliding block;

the film clamping sliding block comprises a first shoulder part and a second shoulder part which are raised and a concave baffle which is depressed, and a concave shape is formed; the film clamping slide way is positioned in the concave gear; the first shoulder is detachably connected with the driving end of the first air cylinder, and the driving end of the third air cylinder can be abutted to the second shoulder.

The film clamping block is provided with a vacuum groove on the surface of one side close to the corner cutting board assembly, and the vacuum groove is connected with a second negative pressure device.

The distance between the four groups of corner cutting modules is adjustable so as to meet the size requirements of products to be packaged with different specifications.

The invention also provides a thermal shrinkage film packaging machine which comprises the corner cutting mechanism.

The film cutting mechanism comprises a film cutting module, a film pulling module and a transplanting film opening module;

the film cutting module comprises a cutter assembly and a lower chopping board assembly and is used for cutting and sealing the film material to form a film material bag with one open end;

the film drawing module comprises a film drawing device and a clamping device, the film drawing device can draw the film material at one end of the film cutting module, which is closed, to a preset distance, and the clamping device can draw the film material at the preset distance to be fixed;

the transplanting membrane opening module can convey the membrane material bag prepared by the membrane cutting module to a next procedure, and can open the bag opening of the membrane material bag.

The film covering mechanism comprises a material pushing and shaping module, a material distributing module and a tail film cutting module;

the material distribution module comprises a material distribution driving device and a material placing frame arranged at the driving end of the material distribution driving device, and the material distribution driving device is used for lifting a product to be packaged on the material placing frame to a preset height;

the material pushing and shaping module comprises a material pushing sliding module, a shaping fixing frame in sliding connection with the material pushing sliding module, a shaping device fixed on the shaping fixing frame and a material pushing plate; the shaping device comprises a shaping driving device and two shaping plates, and the shaping driving device can drive the two shaping plates to move towards the directions close to or away from each other so as to open or loosen the opening of a film material bag for packaging the product to be packaged; when the shaping fixing frame moves on the material pushing sliding module towards the direction of the tail cutting film module, the material pushing plate can push the product to be packaged to move towards the direction of the tail cutting film module;

the tail film cutting module comprises a tail film cutter assembly and a tail film lower anvil plate assembly and is used for cutting off the redundant tail film of the film material bag

Further, still including supplying membrane mechanism, supply membrane mechanism be used for cut membrane mechanism provides the membrane material, the membrane material includes membrane and lower membrane, just one of them one end of membrane length direction is the closed condition for membrane and lower membrane edge membrane material.

According to the technical scheme, the corner cutting mechanism of the heat-shrinkable film packaging machine can cut redundant film materials at four corners of a film material bag of a product to be packaged at one time by arranging four corner cutting modules, meanwhile, each corner cutting module comprises a corner cutting and shaping assembly, and the corner cutting and shaping assembly can move towards the corner cutting chopping block assembly, so that the redundant waste films are clamped, and meanwhile, the corner cutting and shaping assembly can move along the second direction, so that the clamped waste films can be leveled, the waste films can be cut later, the flatness of the packaging films can be kept, the fineness and the flatness of outer packages of the product can be improved, the good sensitivity of the product in the heart of a user can be increased, the competitiveness of the product in the market can be improved, and the grade of the product can be improved.

Drawings

Fig. 1 is a schematic structural diagram of a corner cutting mechanism of a shrink film packaging machine according to an embodiment of the invention.

Fig. 2 is a schematic structural diagram of a first distance adjusting device and a second distance adjusting device according to an embodiment of the present invention.

Fig. 3 is a schematic view of a corner cutting block assembly and a corner cutting knife assembly according to an embodiment of the present invention.

FIG. 4 is a schematic view of the corner cutting block assembly and the corner cutting knife assembly of the present invention from another perspective.

Fig. 5 is a schematic structural diagram of a corner cutting board assembly, a corner cutting knife assembly and a third distance adjusting device according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a corner cut reshaping component according to an embodiment of the present invention.

Fig. 7 is an exploded view of a corner cut reshaping component according to an embodiment of the invention.

Fig. 8 is a schematic structural diagram of a film covering mechanism according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a material pushing and shaping module of the film covering mechanism according to the embodiment of the invention.

Fig. 10 is a schematic structural diagram of a shaping device of a film covering mechanism according to an embodiment of the present invention.

Fig. 11 is a structural diagram of another view angle of the film covering mechanism according to the embodiment of the invention.

Fig. 12 is a schematic structural diagram of a tail film lower anvil plate component of the film covering mechanism according to the embodiment of the invention.

Fig. 13 is a schematic structural diagram of a tail film cutting module of the film covering mechanism according to the embodiment of the invention.

Fig. 14 is a schematic structural diagram of a film cutting mechanism according to an embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a film cutting module of the film cutting mechanism according to the embodiment of the invention.

Fig. 16 is an exploded view of a film cutting module of the film cutting mechanism according to the embodiment of the invention.

Fig. 17 is a schematic structural diagram of a film drawing module of the film cutting mechanism according to the embodiment of the invention.

Fig. 18 is a schematic structural diagram of a transplanting membrane opening module of the membrane cutting mechanism according to an embodiment of the present invention.

FIG. 19 is a schematic structural diagram of a film clamping mechanism of the film cutting mechanism according to the embodiment of the invention.

Fig. 20 is a schematic structural diagram of a film clamping mechanism of the film cutting mechanism according to the embodiment of the invention.

The meaning of the reference symbols in the drawings is:

300-a corner cutting mechanism; 310-a rack; 320-corner cutting module; 3201-a first corner cut module; 3202-a second corner cut module; 3203-a third corner cut module; 3204-a fourth corner cut module; 330-a first distance adjustment device; 331-adjusting the guide rail; 332-adjusting the handwheel; 333-a first adjusting screw; 334-connecting rods; 335-a second adjusting screw; 336-a limiting part; 3371-first adjustment slide; 3372-second adjustment slide; 321-a corner cutting board component; 3211-cutting corner and chopping board; 3212-a material-bearing platform; 3213-vacuum port adjusting plate; 3214-a material suction pipe; 322-a corner cutter assembly; 3221-corner cutter; 3222-a corner cutter drive; 323-corner cut reshaping component; 3231-sandwiching a membrane block; 3232-vacuum tank; 3233-first cylinder; 3234-a second cylinder; 3235-third cylinder; 3236-film clamping slide; 3237-film clamping slide block; 32371 — first shoulder; 32372-second shoulder; 324-corner cutting module fixing plate; 351-adjusting the slide way; 3521-a first sled; 3522-a second sled; 353, erecting a frame; 354-a push rod; 355-a lever assembly;

10-a product to be packaged; 20-film material bag; 100-a film covering mechanism; 110-cutting a tail film module; 111-a tail film cutter assembly; 1111-tail film cutter driving device; 1112-cutter assembly holder; 1113-tail film hot-cutting knife guard board; 1114-hot cutter for tail film; 1115-tail film hot knife thermal insulation block; 112-tail film lower anvil plate assembly; 1121-lower chopping block lifting module; 1122-tail lower chopping block; 1123-covering the membrane position supporting plate; 1124-support plate for incising the tail membrane; 1125-tail film striker plate; 1126-tail film clamping assembly; 11261-trailing membrane clamping cylinder; 11262-a drive rack; 11263-tail film clamping block; 11264-tail membrane clamping block holder; 11265-tail film fixed block; 120-a material distribution module; 121-a material-dividing driving device; 122-a shelf; 1221-a roller; 1222-a fixed frame; 123-material distribution baffle; 130-a feeding module; 140-pushing material shaping module; 141-pushing sliding module; 142-a pusher plate; 143-shaping fixing frame; 144-a shaping device; 1441-a shaping drive; 14411-shaping cylinder; 14412-synchronous belt device; 1442-shaping plate; 14421 — first shaping plate; 14422-a second shaping plate; 150-waste tail film absorbing device;

200-a film cutting mechanism; 210-cutting the membrane module; 220-film drawing module; 230-transplanting and opening the membrane module; 211-a cutter assembly; 2111-a fixation assembly; 21111-drive means; 21112-fixation plate; 21113-opening membrane block; 21114-anti-drop device; 2112-moving the assembly; 21121-slide rail; 21122-slider; 21123-mounting plate; 21124-drive block; 21125-rebound device; 21126-inductor; 21127-protective plate; 21128-light shield; 21129-insulating blocks; 21130-hot knife; 21131-sliding means; 212-lower anvil plate assembly; 2121-cutting the board; 2122-cutting board fixing frame; 221-a film drawing device; 2211-film-drawing sliding module; 2212-stretch film strip; 2213-avoid mouth; 2214-membrane separation block; 222-a clamping device; 2221-clamp drive; 2222-rotation block; 2223-fixed block; 231-transplanting the sliding module; 232-opening the membrane assembly; 2321-a lifting mechanism; 2322-film clamping mechanism; 23221-first drive means; 23222-upper support; 23223-fixing plate; 23224-upper clamping plate; 2323-membrane-clamping mechanism; 23231-lower rotating plate; 23232-limit fixing block; 23233-rotating shaft; 23234-lower rack; 23235-second drive means; 23236-lower fixing plate; 233-connecting plate; 234-support plate.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1: as shown in fig. 1 to 7, the corner cutting mechanism 300 of the heat shrink film packaging machine of the present embodiment includes a frame 310 and four corner cutting modules 320 disposed at four corners of the frame 310, where the four corner cutting modules 320 are used to cut four corners of a packaging film, and the packaging film to be subjected to corner cutting is located at the center of the frame 310. In this embodiment, the distances between the four corner cutting modules 320 are adjustable to meet the size requirements of products to be packaged with different specifications. Specifically, the corner cutting mechanism 300 further includes a distance adjusting device including a first distance adjusting device 330 and a second distance adjusting device, and the adjusting directions of the first distance adjusting device 330 and the second distance adjusting device are perpendicular to each other.

As shown in fig. 2, the first distance adjusting device 330 includes two adjusting guide rails 331 arranged in parallel, adjusting slide plates slidably connected to the two adjusting guide rails 331, and an adjusting lever mechanism arranged in parallel to the adjusting guide rails 331. The adjusting slide blocks are arranged at the positions of each adjusting slide plate corresponding to the two adjusting guide rails 331 and can slide along the adjusting guide rails 331. The adjustment lever mechanism includes an adjustment hand wheel 332, a first adjustment screw 333, a second adjustment screw 335, a connecting rod 334, and two adjustment blocks (not shown). Two regulating blocks are respectively fixed on two regulating slide plates, and are respectively provided with an internal thread structure, and the thread directions of the two internal threads are opposite. One end of the first adjusting screw 333 is detachably connected with the adjusting handwheel 332, and the other end is connected with the connecting rod 334. One end of the second adjusting screw 335 is detachably connected with one end of the connecting rod 334 far away from the first adjusting screw 333, and the other end is provided with a detachable limiting part 336. The surfaces of the first adjusting screw 333 and the second adjusting screw 335 are respectively provided with external threads, the thread directions of the two sets of external threads are opposite, the first adjusting screw 333 is matched with the internal thread of the adjusting block close to one end of the adjusting hand wheel 332, and the second adjusting screw 335 is matched with the internal thread of the adjusting block far away from one end of the adjusting hand wheel 332. When the hand wheel is shaken, since the first and second adjustment screws 333 and 335 are threaded in opposite directions, the two adjustment slides can be moved toward and away from each other on the adjustment guide 331 to change the distance between the two adjustment slides.

The second distance adjusting device comprises adjusting slideways 351 respectively arranged on the surfaces of the adjusting sliding plates on one sides far away from the adjusting guide rails 331, sliding plates respectively connected with the adjusting slideways 351 in a sliding manner, stands 353 arranged on the sliding plates, push rods 354 and adjusting rod assemblies 355. The direction of the adjusting slide 351 is perpendicular to the direction of the adjusting guide rail 331, the adjusting slide 351 is arranged along the length direction of the adjusting slide, the adjusting slide close to one side of the adjusting hand wheel 332 is a first adjusting slide 3371, the adjusting slide far away from one end of the adjusting hand wheel 332 is a second adjusting slide 3372, the first adjusting slide 3371 is provided with a first corner cutting module 3201 and a second corner cutting module 3202, and the second adjusting slide 3372 is provided with a third corner cutting module 3203 and a fourth corner cutting module 3204. The first corner module is fixed near the first end of the first adjusting slide plate 3371, and the third corner module 3203 is fixed near the first end of the second adjusting slide plate 3372, that is, the first corner module 3201 and the third corner module 3203 are located on the same side. The adjusting slide 351 of the first adjusting slide plate 3371 extends from a second end opposite to the first end of the first adjusting slide plate 3371 to the vicinity of the first corner module 3201, and the adjusting slide 351 of the second adjusting slide plate 3372 extends from a second end opposite to the first end of the second adjusting slide plate 3372 to the vicinity of the third corner module 3203. The sliding plate arranged on the second adjusting sliding plate 3372 is a second sliding plate 3522, the sliding plate arranged on the first adjusting sliding plate 3371 is a first sliding plate 3521, a through hole is arranged in the middle of the upright 353 on the second sliding plate 3522 and is used for a push rod 354 to pass through, one end of the push rod 354 is fixedly connected with the upright 353 on the first sliding plate 3521, and the other end of the push rod 354 passes through the through hole of the upright 353 on the second sliding plate 3522. The adjustment lever assembly 355 is fixed to the first adjustment sliding plate 3371, and the adjustment lever assembly 355 is also threaded to adjust the distance, similar to the adjustment lever mechanism. The adjusting rod assembly 355 can drive the stand 353 on the first adjusting sliding plate 3371 to move along the adjusting slide 351 on the first adjusting sliding plate 3371, and the stand 353 on the first adjusting sliding plate 3371 drives the stand 353 on the second adjusting sliding plate 3372 to move along the adjusting slide 351 on the second adjusting sliding plate 3372 through the push rod 354 fixedly connected with the stand 353, so that the distances between the second corner cutting module 3202 and the fourth corner cutting module 3204 and the first corner cutting module 3201 and the third corner cutting module 3203 are adjustable.

As shown in fig. 5, in order to adjust the distance more precisely, a third distance adjusting device may be further provided on the second corner cut module 3202 and the fourth corner cut module 3204, for example, a sliding device may be provided between the corner cut module fixing plate 324 and the stand 353, a driving device may be provided at an end of the sliding device, the driving device drives the corner cut module fixing plate 324 to move along a sliding direction of the sliding device, the sliding direction of the sliding device is the same as the moving direction of the second distance adjusting device, and the driving device may be an air cylinder.

The corner cutting module 320 comprises a corner cutting board component 321, a corner cutting knife component 322, a corner cutting reshaping component 323 arranged on one side of the corner cutting board component 321 close to the corner cutting knife component 322, and a corner cutting module fixing plate 324; the corner cutting board component 321, the corner cutting knife component 322 and the corner cutting and shaping component 323 are all fixed on the corner cutting module fixing plate 324; the corner cutting and shaping component 323 comprises a corner cutting and shaping driving device and a film clamping block 3231 fixedly connected with the driving end of the corner cutting and shaping driving device; the chamfering and shaping driving device can drive the film clamping block 3231 to move in a first direction and a second direction which are perpendicular to each other, wherein the first direction is the direction in which the film clamping block 3231 is close to or far away from the chamfering and cutting board assembly 321.

As shown in fig. 3 and 4, the corner cutting knife assembly 322 includes a corner cutting knife driving device 3222 and a corner cutting knife 3221 fixedly connected to a driving end of the corner cutting knife driving device 3222.

The corner cutting board assembly 321 includes a corner cutting board 3211 fixed to the corner cutting module fixing plate 324 and a material supporting platform 3212 fixed to the bottom of the corner cutting board 3211. The position that corner cut chopping block 3211 and corner cut cutter subassembly 322 contacted is provided with flexible silica gel strip, can avoid hard contact, simultaneously the outside of silica gel strip still is equipped with the teflon protection cloth, can prevent that the adhesion from taking place for membrane material and corner cut chopping block 3211 that the cutting got off. The corner cutting mechanism 300 further comprises a waste film collecting module, wherein the waste film collecting module comprises a first negative pressure device, a material sucking pipe 3214 communicated with the first negative pressure device, and a sucking assembly arranged on the corner cutting board 3211; the suction assembly comprises a cavity arranged inside the corner cutting board 3211, a first opening is formed in one side, close to the film clamping block 3231, of the corner cutting board 3211, and a second opening is formed in the bottom of the corner cutting board 3211; a vacuum port adjusting plate 3213 is arranged at the first opening and used for adjusting the air volume at the first opening; the second opening is communicated with the material suction pipe 3214. Since the corner cutting mechanism 300 has four corner cutting modules 320, in order to make the structure of the whole mechanism simpler and for cost reasons, the four corner cutting modules 320 can share one negative pressure device, the suction pipes 3214 of the four corner cutting modules 320 are respectively connected with the main suction pipe, and the main suction pipe is connected with the first negative pressure device.

As shown in fig. 6 and 7, the corner cut driving device includes a first cylinder 3233 and a third cylinder 3235 which are arranged in parallel and at an interval, a second cylinder 3234 which is arranged in a driving direction perpendicular to the driving direction of the first cylinder 3233 and the third cylinder 3235, a film clamping slide 3236 which is arranged in parallel to the driving direction of the first cylinder 3233 and the third cylinder 3235, and a film clamping slider 3237 which can slide on the film clamping slide 3236; the first cylinder 3233 and the third cylinder 3235 are fixed at the bottom of the corner cutting module fixing plate 324, and the film clamping slideway 3236 is located between the first cylinder 3233 and the third cylinder 3235; the driving end of the second cylinder 3234 is detachably connected to the film clamping slide block 3237.

The film clamping slide block 3237 comprises a first shoulder portion 32371 and a second shoulder portion 32372 which are convex, and a concave step which is concave, so that a concave shape is formed; the film clamping slide 3236 is positioned in the concave rail; the first shoulder 32371 is detachably connected to the driving end of the first cylinder 3233, the driving end of the third cylinder 3235 can abut against the second shoulder 32372, the stroke of the extension and contraction of the driving end of the third cylinder 3235 is smaller than the stroke of the extension and contraction of the driving end of the first cylinder 3233, and the stroke of the extension and contraction of the driving end of the third cylinder 3235 is half of the stroke of the extension and contraction of the driving end of the first cylinder 3233 in this embodiment.

The surface of one side of the film clamping block 3231 close to the corner cutting board assembly 321 is provided with a vacuum groove 3232, and the vacuum groove 3232 is connected with a second negative pressure device.

The working principle of the chamfering mechanism 300 is as follows: at the beginning, three cylinders of the corner cutting driving device are all in a retracting state, firstly, the driving end of a first cylinder 3233 extends out to drive a film clamping slide block 3237 to move along a film clamping slide rail 3236 along a direction parallel to the corner cutting chopping board 3211, and the film clamping slide block 3237 drives the film clamping slide block 3237 fixedly connected with the film clamping slide block to move towards the direction of a film material bag to be subjected to corner cutting and press the film material bag. Then, the driving end of the second cylinder 3234 drives the film clamping block 3231 to move toward the corner cutting board 3211, so as to clamp the film bag to be subjected to corner cutting on the corner cutting board 3211. Then, the driving end of the third cylinder 3235 extends out, the driving end of the first cylinder 3233 retracts, the film clamping sliding block 3237 is located at a position which is half of the driving stroke of the first cylinder 3233 due to the blocking effect of the third cylinder 3235, the corner carding is completed at the moment, and the second negative pressure device is started to prevent the film clamping from being not in place and prevent waste films from falling off after being cut off. After the waste film is cut off, the driving end of the third cylinder 3235 is retracted, the film clamping block 3231 drives the waste film to move, the waste film is prevented from being stuck, the second negative pressure device is closed, the first negative pressure device is opened, and the waste film is collected through the material suction pipe 3214.

The corner cut mechanism of this embodiment can comb the corner of membrane pocket, makes the cutting of membrane pocket more accurate, and the effect after the packing is more level and smooth, is favorable to improving the whole effect of packing, promotes the grade of product.

Example 2: the heat shrinkable film packaging machine of the present embodiment includes the corner cutting mechanism 300 of embodiment 1, and further includes a film covering mechanism 100 located in a previous process of the corner cutting mechanism 300. After the film covering work is finished on the film covering mechanism 100, the excess film material at the four corners of the film material bag 20 is cut off through the corner cutting mechanism 300, so that the packaging film is more smooth and beautiful.

As shown in fig. 8 to 13, the film covering mechanism 100 includes a material pushing and shaping module 140, a material separating module 120, and a tail film cutting module 110, and may further include a material feeding module 130.

As shown in fig. 8, the feeding module 130 is disposed at the feeding end of the film covering mechanism 100, and may be a conveyor mechanism for conveying the product to be packaged to the film covering mechanism 100.

As shown in fig. 8 and 11, the material dividing module 120 is disposed at an end of the feeding module 130 close to the tail film cutting module 110, that is, a discharging end of the feeding module 130, and includes a material dividing driving device 121 and a material placing rack 122 disposed at a driving end of the material dividing driving device 121, where the material dividing driving device 121 is configured to lift the product to be packaged 10 placed on the material placing rack 122 to a preset height. The material distributing driving device 121 may be a device with a lifting function, such as an air cylinder or a hydraulic mechanism, the material placing shelf 122 includes a fixed frame 1222 fixedly connected to the driving end of the air cylinder and a plurality of rollers 1221 disposed on the fixed frame 1222, and the rollers 1221 are in rolling connection with the fixed frame 1222. The feeding module 130 conveys the product to be packaged on the shelf 122 of the material distribution module 120, and the material distribution driving device 121 lifts the product 10 to be packaged on the shelf 122 to a preset height, so as to facilitate the material pushing and shaping module 140 to push the material. The material distributing module 120 may further include a material distributing baffle 123 disposed at an end of the material placing shelf 122 close to the tail cutting film module 110, and when the material placing shelf 122 is lifted to a preset height, an upper surface of the material placing shelf 122 is higher than an upper surface of the material distributing baffle 123. The material distributing baffle 123 is used for preventing the product 10 to be packaged from dropping, and when the article placing rack 122 is lifted to a preset height, the upper surface of the article placing rack 122 is higher than the upper surface of the material distributing baffle 123, so that interference between the material distributing baffle 123 and the material pushing action of the material pushing and shaping module 140 can be avoided.

As shown in fig. 9 and 10, the material pushing and shaping module 140 includes a material pushing sliding module 141, a shaping fixing frame 143 slidably connected to the material pushing sliding module 141, a shaping device 144 fixed on the shaping fixing frame 143, and a material pushing plate 142. The sliding direction of the material pushing sliding module 141 is the same as the feeding direction of the feeding module 130, and the material pushing sliding module 141 is parallel to the conveying direction of the feeding module 130. The shaping device 144 includes a shaping driving device 1441 fixed on the shaping fixing frame 143, and two shaping plates 1442 slidably connected to the shaping fixing frame 143. The material pushing plate 142 is located in the middle of the shaping fixing bracket, and the two shaping plates 1442 are located on two sides of the material pushing plate 142 respectively. The reshaping driving means 1441 can drive the two reshaping plates 1442 to move towards or away from each other to open or release the mouth of the bag 20 for packaging the product 10 to be packaged; when the shaping fixing frame 143 moves towards the direction of the tail film cutting module 110 on the material pushing sliding module 141, the material pushing plate 142 can push the product to be packaged 10 to move towards the direction of the tail film cutting module 110. In this embodiment, the shaping driving device 1441 includes a shaping cylinder 14411 and a timing belt device 14412, a piston rod of the shaping cylinder 14411 is fixedly connected to one shaping plate (a first shaping plate 14421) which is fixedly connected to a timing belt on a side of the timing belt device 14412 close to the shaping cylinder 14411, the other shaping plate (a second shaping plate 14422) is fixedly connected to a timing belt on a side of the timing belt device 14412 far from the shaping cylinder 14411, and a driving direction of the shaping cylinder 14411 is the same as a conveying direction of the timing belt device 14412 and is perpendicular to a conveying direction of the feeding module 130. When shaping is needed, the piston rod of the shaping cylinder 14411 extends out to drive the first shaping plate 14421 to move outwards, the first shaping plate 14421 drives the synchronous belt to move, meanwhile, the synchronous belt drives the second shaping plate 14422 to move outwards, and until the piston rod of the shaping cylinder 14411 extends out completely, the two shaping plates 1442 are in an open state. When the two shaping plates 1442 need to be retracted, the piston rod of the shaping cylinder 14411 is retracted to drive the first shaping plate 14421 to move inward, the first shaping plate 14421 drives the synchronous belt, and the synchronous belt drives the second shaping plate 14422 to move inward as well until the piston rod of the shaping cylinder 14411 is fully retracted, and the two shaping plates 1442 are retracted. To make the movement of the two shaping plates 1442 more smooth and accurate, a slide means may be further provided between the two shaping plates 1442 and the shaping holder 143.

As shown in fig. 13, the tail film cutting module 110 includes a tail film cutter assembly 111 and a tail film lower anvil assembly 112 for cutting off the excess tail film of the film bag 20.

The tail film cutter assembly 111 comprises a cutter assembly fixing frame 1112, a tail film cutter driving device 1111 fixed on the cutter assembly fixing frame 1112, and a tail film hot cutter 1114 connected to the driving end of the tail film cutter driving device 1111.

A tail film thermal cutter heat insulation block 1115 is further arranged between the tail film thermal cutter 1114 and the driving end of the tail film cutter driving device 1111; the two sides of the tail film hot cutter 1114 can be respectively provided with a tail film hot cutter guard board 1113. The tail film hot cutter heat insulation block 1115 can prevent the heat that the hot cutter distributes from influencing the service life of other components, the tail film hot cutter backplate 1113 can prevent that operating personnel from mistakenly colliding the scald accident that takes place. The tail film cutter driving means 1111 may be a cylinder device which drives the hot cutting door to move up and down.

As shown in fig. 12, the tail membrane lower cutting board assembly 112 includes a lower cutting board lifting module 1121, a tail membrane lower cutting board 1122 fixedly connected to a driving end of the lower cutting board lifting module 1121, a film covering position supporting plate 1123 located at a side of the lower cutting board assembly close to the material distribution module 120, and a tail membrane cutting position supporting plate 1124 located at a side of the lower cutting board assembly far from the material distribution module 120, wherein the tail membrane lower cutting board lifting module 1121 can drive the tail membrane lower cutting board 1122 to move within a preset range. In this embodiment, the lower cutting board lifting module 1121 is a lead screw module, and the lead screw module can precisely control the stroke of the tail film lower cutting board 1122. The one end that surely tail membrane position backup pad 1124 kept away from chopping board 1122 under the tail membrane still is equipped with tail membrane striker plate 1125 for prevent that the product of treating the packing from dropping.

The tail film lower cutting board assembly 112 may further include two tail film clamping assemblies 1126 fixedly connected to the tail film lower cutting board 1122, and the two tail film clamping assemblies 1126 are respectively disposed near two ends of the width direction of the tail film lower cutting board 1122 and are configured to clamp an end portion of the film material bag 20 filled with the product 10 to be packaged and pushed by the material pushing and shaping module 140. In this embodiment, each of the tail membrane clamping assemblies 1126 includes a tail membrane clamping cylinder 11261 fixedly connected to the tail membrane lower anvil 1122, a driving frame 11262 fixedly connected to a driving end of the tail membrane clamping cylinder 11261, a tail membrane clamping block 11263 pivotally connected to the driving frame 11262, a tail membrane clamping block holder 11264 for fixing the tail membrane clamping block 11263, and a tail membrane fixing block 11265 fixedly connected to the tail membrane lower anvil 1122. The tail film clamping block bracket 11264 is fixedly connected with the tail film lower cutting board 1122 and is positioned between the tail film fixing block 11265 and the tail film clamping cylinder 11261. The tail film clamping block 11263 is in an L shape, one end of the L shape is pivoted with the tail film driving frame 11262, the other end of the L shape is used for being in contact with the tail film fixing block 11265 to clamp a tail film, and the middle corner of the L shape is pivoted with the tail film clamping frame. The piston rod of the trailing membrane clamping cylinder 11261 is raised, pushing the trailing membrane clamping block 11263 to rotate about the axis of rotation of the trailing membrane clamping bracket, enabling clamping of the trailing membrane when the trailing membrane clamping block 11263 abuts the trailing membrane fixation block 11265. The piston rod of the trailing clamping cylinder descends, pulling trailing membrane clamping block 11263 to rotate in the opposite direction about the axis of rotation of the trailing membrane clamping bracket, moving trailing membrane clamping block 11263 away from the surface of trailing membrane holding block 11265, thereby releasing the clamped trailing membrane.

The film covering mechanism 100 further comprises a waste film sucking device 150, wherein the waste film sucking device 150 is arranged near the tail film clamping assemblies 1126, for example, can be arranged between two tail film clamping assemblies 1126, and is used for collecting waste tail films clamped by the tail film clamping assemblies 1126. Inhale useless tail membrane device 150 and include negative pressure device, absorption tube and collector, inhale the absorption tube through the useless tail membrane that the negative pressure will cut off, get into the collector at last and collect, prevent that the useless tail membrane that cuts off scatters everywhere, influences the surrounding environment.

The working principle of the embodiment is as follows: the product 10 to be packaged is conveyed to the shelf 122 of the material separating module 120 by the feeding module 130, the material separating driving device 121 drives the shelf 122 to rise to a preset height, the film material bag 20 with the mouth opened by clamping in the previous process is conveyed to the film covering position supporting plate 1123, the material pushing and shaping module 140 pushes the product 10 to be packaged on the shelf 122 under the driving of the material pushing and sliding module 141, so that the product 10 to be packaged enters the film material bag 20, after the packaged product 10 completely enters the film material bag 20, the shaping driving device 1441 drives the two shaping plates 1442 to open towards both sides so as to open the mouth of the film material bag 20, the device clamping the film material bag 20 in the previous process releases the film material bag 20, the material pushing and shaping module 140 continues to push the product 10 to be packaged and the film material bag 20 covered outside the product 10 to be packaged to the tail cutting film covering position supporting plate 1124, when the product 10 to be packaged and the film material bag 20 are completely positioned on the tail cutting film covering position supporting plate 1124, the tail film lower anvil plate component 112 moves upwards to the height midpoint of the product 10 to be packaged, the two tail film clamping components 1126 clamp the end of the film material bag 20, the tail film hot cutter 1114 cuts off the redundant tail film, the cut tail film is clamped by the tail film clamping components 1126, the waste tail film suction device 150 is opened, the two tail film clamping components 1126 release the clamped redundant tail film, and the waste tail film is sucked into the collector.

The film covering mechanism 100 of the thermal shrinkage film packaging machine of the embodiment shapes the film material bag 20 through the material pushing and shaping module 140, meanwhile, the tail film lower cutting board component 112 can move upwards to the height midpoint of the product 10 to be packaged according to the preset distance, the two tail film clamping components 1126 clamp the end part of the film material bag 20, and redundant tail films are cut off again, the operation can enable the cutting of the tail films to be more smooth and accurate, meanwhile, the final cutting seal is located at the height midpoint of the product 10 to be packaged, the appearance is more attractive, a waste tail film collecting device is arranged, and the protection of the surrounding environment is facilitated.

Example 3: the heat shrinkable film packaging machine of the present embodiment includes the corner cutting mechanism 300 of embodiment 1, the film covering mechanism 100 of embodiment 2, and further includes a film cutting mechanism 200 and a film supplying mechanism. The film supplying mechanism firstly supplies a film material to the film cutting mechanism 200, wherein the film material comprises an upper film and a lower film, and one end of the upper film and one end of the lower film along the length direction of the film material are in a closed state. Then, the film cutting mechanism 200 cuts the film material, simultaneously closes two openings of the film material to form a film material bag 20 with one opening, opens a bag opening of the film material bag 20, conveys the film material bag 20 to the film covering mechanism 100, closes the opening of the film material bag 20 by the film covering mechanism 100, and cuts off the redundant tail film. The corner cutting mechanism 300 combs the four corners of the film material bag 20, and cuts off the redundant film material at the four corners, so as to be beneficial to forming a flat and beautiful packaging film at the later stage.

As shown in fig. 14 to 20, the film cutting mechanism 200 includes a film cutting module 210, a film pulling module 220 and a film transplanting and opening module 230.

As shown in fig. 15 and 16, the film cutting module 210 includes a cutter assembly 211 and a lower anvil assembly 212 for cutting and closing the film to form a film bag with one open end.

The cutter assembly 211 includes a stationary assembly 2111 and a moving assembly 2112. The fixing assembly 2111 includes a fixing plate 21112 and a driving device 21111 provided on the fixing plate 21112. In this embodiment, the driving device 21111 is an air cylinder, the air cylinder is fixed near the upper edge of the fixing plate 21112, and a piston rod of the air cylinder is disposed downward. In order to facilitate the separation of the upper membrane and the lower membrane of the membrane material bag, a membrane opening assembly 232 may be further disposed at the edge of the fixing plate 21112 near one end of the lower anvil assembly 212, and the membrane opening assembly 232 includes a cylindrical opening module fixed at the lower edge of the fixing plate 21112. The die sinking subassembly sets up the open end of membrane pocket, and the membrane material is gone up the membrane and is located the mould of opening above, and lower membrane is located the mould of opening below when the feeding to make upper and lower membrane separate.

The moving assembly 2112 is slidably connected to the fixing plate 21112, and includes a mounting plate 21123 and a hot knife 21130 disposed at an end of the mounting plate 21123 close to the lower anvil plate assembly 212. A sliding rail 21121 and a sliding block 21122 which are matched with each other are arranged between the mounting plate 21123 and the fixing plate 21112, and the sliding block 21122 can slide along the sliding rail 21121. In this embodiment, the number of the sliding rails 21121 is two, the two sliding rails are disposed on a surface of the fixing plate 21112 on a side close to the mounting plate 21123, and are respectively disposed on two sides of the mounting plate 21123 in the width direction, and the sliding direction of the sliding rail 21121 is a vertical direction. The mounting plate 21123 is fixedly connected with the sliding blocks 21122, and each sliding rail 21121 is provided with at least two sliding blocks 21122.

The mounting plate 21123 is provided with a driving notch at a position corresponding to a piston rod of the driving device 21111, the driving notch is internally provided with a driving block 21124, the end part of the piston rod of the driving device 21111 is detachably connected with the driving block 21124, and when the driving device 21111 can drive the moving assembly 2112 to move up and down on the fixing plate 21112 along the vertical direction.

The cutter assembly 211 may further include a heating tube and a thermocouple disposed inside the hot cutter 21130, and protection plates 21127 disposed at both sides of the hot cutter 21130, wherein the protection plates 21127 are disposed at both sides of the hot cutter 21130 to prevent scalding accidents caused by accidental contact of an operator. Because the temperature of the hot-cutting knife 21130 is higher, in order to prolong the service life of the equipment, a plurality of heat insulation blocks 21129 are arranged between the hot-cutting knife 21130 and the mounting plate 21123, the hot-cutting knife 21130 is connected with the mounting plate 21123 through the heat insulation blocks 21129, so that the heat damage of the hot-cutting knife 21130 to the mounting plate 21123 can be effectively reduced, if the heat insulation blocks 21129 are damaged, only the corresponding heat insulation blocks 21129 need to be replaced, the equipment is maintained more conveniently, and the maintenance cost is reduced.

To prevent over-pressurization from damaging the equipment when the cutter assembly 211 cuts hard, hard cut prevention devices may also be provided on the moving assembly 2112, including a resilient device 21125, a sensor 21126, and a shield 21128. The shading plate 21128 is slidably connected to the mounting plate 21123 via a sliding device 21131, the sliding device 21131 may be a slide rail and a slider, a slide bar and a slide groove, or the like, and the sliding device 21131 is disposed near both ends of the mounting plate 21123 in the width direction. The rebounding device 21125 is disposed on the mounting plate 21123 and is located right above the shading plate 21128, and the rebounding device 21125 may be a spring, a nitrogen spring, or the like. The hot knife 21130 is fixed at one end of the shading plate 21128 close to the lower chopping block component 212, and the sensor 21126 is arranged on the mounting plate 21123 and comprises a slot-shaped hole for sensing light. When the rebounding device 21125 is in a free state, the light shielding plate 21128 is located below the inductor 21126. When the hot cutter 21130 cuts hard objects, the shading plate 21128 moves upwards and compresses the rebounding device 21125 under the influence of resistance, the shading plate 21128 shields the slot-shaped hole when rising to a certain degree, the sensor 21126 senses that the hard objects are cut and sends a control signal to a control system, and the control system controls the driving device 21111 to drive the hot cutter 21130 to lift upwards according to the control signal. The arrangement of the hard cutting prevention device can avoid damage to the equipment when the hard objects are cut, and meanwhile, when the hands of an operator are cut carelessly, the hot cutter 21130 can be lifted rapidly, so that accidents caused by personal injury are prevented.

Because the driving device 21111 of this embodiment is an air cylinder, when the air cylinder is suddenly powered off or powered off, the piston rod of the air cylinder will lose control and fall off, and in order to avoid the accident that the moving assembly 2112 falls off due to power off or power off, an anti-falling device 21114 may be provided, where the anti-falling device 21114 includes at least one spring assembly, and the number of the spring assemblies in this embodiment is two. Each group of spring assemblies comprises a spring and a fixing block 2223 respectively arranged at one side of the fixing plate 21112 and the mounting plate 21123 close to each other; both ends of the spring are connected to the two fixing blocks 2223, respectively. When the piston rod loses tension on the moving assembly 2112, the spring can enable the moving assembly 2112 to be under tension, and accidents caused by falling of the moving assembly 2112 are avoided.

The lower cutting board assembly 212 comprises a lower cutting board holder 2122 and a lower cutting board 2121 mounted on the lower cutting board holder 2122. In order to avoid rigid contact when the film cutting module 210 cuts the film material, a silicone strip can be arranged on the upper surface of the lower chopping block 2121, a piece of teflon protective cloth can be arranged outside the silicone strip to ensure that the cut film material is not easy to adhere to the lower chopping block 2121, and the melted heat-shrinkable film can be effectively prevented from adhering to the lower chopping block 2121 while the heat-shrinkable film is ensured to be cut through.

As shown in fig. 17, the film drawing module 220 includes a film drawing device 221 and a clamping device 222, the film drawing device 221 can draw the film material, of which one end is closed by the film cutting module 210, to a preset distance, and the clamping device 222 can fix the film material drawn by the film drawing device 221 to the preset distance.

The number of the clamping devices 222 is two, and the positions of the clamping devices 222 are adjustable so as to meet the packaging requirements of products with different specifications. For example, the distance between the clamping device 222 and the film cutting module 210 can be adjusted, or the distance between two clamping devices 222 can be adjusted, so that the packaging requirements of products with different lengths and width dimensions can be met. Each of the clamping devices 222 includes a clamping driving device 2221 and a clamping fixing block, and the clamping driving device 2221 can drive the clamping fixing block to open or close so as to clamp or release the film material. The clamping driving device 2221 in this embodiment is a rotary cylinder, and the rotary cylinder is fixed on a rotary cylinder fixing frame. The clamping fixing block includes a fixing block and a rotating block 2222. The fixed block is fixed in on the revolving cylinder mount, rotatory piece 2222 with revolving cylinder's piston rod fixed connection, revolving cylinder's piston rod can drive rotatory piece 2222 is rotatory, so that fixed block and rotatory piece 2222 form the clip structure, it is right the membrane material carries out the centre gripping or relaxs.

The film drawing device 221 includes a film drawing sliding module 2211 and a film drawing strip 2212 slidably connected to the film drawing sliding module 2211. The film drawing sliding module 2211 can drive the film drawing strip 2212 to slide along the sliding direction of the film drawing sliding module 2211. An avoiding opening 2213 corresponding to the clamping fixed block is arranged on the film drawing strip 2212, and a film separating block 2214 protruding out of the upper surface of the film drawing strip 2212 is further arranged. When the film pulling strip 2212 pulls the film material bag, the film pulling strip 2212 is positioned between the upper film and the lower film, and the film separating block 2214 is used for separating the upper film and the lower film so as to be beneficial to opening the mouth of the film material bag.

As shown in fig. 18 to 20, the transplanting and opening module 230 may transport the film material bag prepared by the cutting module 210 to a next process, and may open a bag opening of the film material bag.

The transplanting membrane opening module 230 comprises a transplanting sliding module 231 and a membrane opening assembly 232 in sliding connection with the transplanting sliding module 231; the membrane opening assembly 232 comprises a lifting mechanism 2321, a membrane clamping mechanism 2322 and a membrane clamping mechanism 2323.

The lifting mechanism 2321 includes a lifting slide module.

The film clamping mechanism 2322 includes an upper bracket 23222 slidably connected to the lifting and sliding module, and at least two upper film clamping devices respectively disposed on the upper bracket 23222, where the number of the upper film clamping devices is two in this embodiment. The distance between the upper film clamping devices is adjustable so as to meet the packaging requirements of products with different specifications. The upper film clamping device comprises a first driving device 23221 and an upper film clamping assembly, and the first driving device 23221 can drive the upper film clamping assembly to open or close so as to clamp or release the upper film of the film material. In this embodiment, the first driving device 23221 is an air cylinder, the upper film clamping assembly includes an upper fixing plate 23223 and an upper clamping plate 23224, the upper fixing plate 23223 is fixedly connected to the upper bracket 23222, the upper clamping plate 23224 is fixedly connected to a driving end of the first driving device 23221, and the first driving device 23221 drives the upper clamping plate 23224 to move up and down, so as to open or close the upper film clamping assembly.

The lower film clamping mechanism 2323 comprises a lower bracket 23234 and at least two lower film clamping devices arranged on the lower bracket 23234; the distance between the lower film clamping devices is adjustable so as to meet the packaging requirements of products with different specifications. The lower film clamping device comprises a second driving device 23235 and a lower film clamping component, and the second driving device 23235 can drive the lower film clamping component to open or close so as to clamp or loosen the lower film of the film material. The lower membrane clamping assembly comprises a rotating shaft 23233 penetrating through the lower bracket 23234, a lower fixing plate 23236 fixed on the lower bracket 23234, and a lower rotating plate 23231 fixed on the rotating shaft 23233. The second driving device 23235 is an air cylinder, the second driving device 23235 is fixed by a fixing seat, a non-driving end of the second driving device 23235 is hinged to the fixing seat, and a driving end of the second driving device 23235 is fixedly connected to one end of the rotating shaft 23233. When the driving end of the second driving device 23235 is extended or retracted, the rotating shaft 23233 can be driven to rotate, so that the lower film clamping assembly is opened or closed. Limiting fixing blocks 23232 may be further disposed on two sides of the lower fixing plate 23236 to limit the position of the lower fixing plate 23236 and avoid displacement.

The transplanting membrane opening module 230 further comprises a support plate 234 and a connecting plate 233 connected with the support plate 234 in a sliding manner; the lifting mechanism 2321 and the film clamping mechanism 2323 are both fixedly connected with the connecting plate 233; when the connecting plate 233 slides along the supporting plate 234, the lifting mechanism 2321, the film clamping mechanism 2322 and the film clamping mechanism 2323 can be driven to slide on the supporting plate 234 together along a first direction; when the transplanting sliding module 231 drives the supporting plate 234 to slide, the supporting plate 234 can drive the lifting mechanism 2321, the film clamping mechanism 2322 and the film clamping mechanism 2323 to slide on the transplanting sliding module 231 along a second direction, and the first direction and the second direction are perpendicular to each other. The means for driving the connection plate 233 may be a linear module, or an air cylinder, or a timing belt, etc. The purpose of the connecting plate 233 sliding on the supporting plate 234 in the first direction is to draw the film-on-clip mechanism 2322 and the film-off-clip mechanism 2323 toward the film material direction, so as to clip the film material. The supporting plate 234 slides on the transplanting slide module 231 in the second direction to transfer the film bag to the next process. When the film material bag is cut and needs to be transferred to a next process, the film clamping mechanism 2322 clamps the upper film of the film material bag and moves upwards along the lifting mechanism 2321 so as to open the bag opening of the film material bag.

The working principle of the film cutting mechanism 200 of the thermal shrinkage film packaging machine of the embodiment is as follows: the film material is fed along the feeding direction, at this time, the film drawing strip 2212 is positioned at one side of the film cutting module 210 far away from the clamping device, and the film drawing strip 2212 and the film opening block 21113 are positioned between the upper film and the lower film of the film material. The hot knife 21130 moves downwards to cut off and seal the film, the film pulling strip 2212 pulls the film and moves towards the clamping device under the driving of the film pulling sliding module 2211, meanwhile, the upper film clamping device and the lower film clamping device move towards the film direction under the driving of the connecting plate 233 and respectively clamp the upper film and the lower film, and the upper film and the lower film move towards the clamping device together with the film pulling strip 2212 under the driving of the transplanting sliding module 231. When the film reaches the position of the clamping device, the clamping device clamps the end of the film, the clamping position of the clamping device is just positioned at the avoidance opening 2213 of the film pulling strip 2212, and after the film is clamped by the clamping device, the film pulling strip 2212 returns to the initial position. The hot cutter 21130 cuts the film material to form a film material bag with three sealed sides. The clamping device is relaxed and the upper film clamping device moves upwards to open the mouth of the film material bag, and simultaneously the support plate 234 slides along the transplanting sliding module 231 towards the next process, so that the film material bag with the opened mouth is conveyed to the next process.

The membrane cutting mechanism 200 of this embodiment, it draws membrane module 220 can draw the membrane material to the fixed length, and makes the membrane material be in the state of extension, does benefit to the accurate cutting of membrane material. And this film cutting mechanism 200 has simultaneously and prevents cutting the function firmly, opening the membrane function, the subassembly prevents the function that drops and open the bag function, and its function is very many, has effectively improved the security and the stability of equipment to improve the roughness and the precision of packaging film, promoted user's impression.

According to the thermal shrinkage film packaging machine provided by the embodiment of the invention, film supply, film cutting, film covering and corner cutting are all performed by adopting an automatic device, the working efficiency is greatly improved, a plurality of mechanisms are provided with film material shaping devices, the film material can be cut and sealed more accurately, the sealing line is positioned in the middle of the height of a product, redundant four corners of the sealing line are cut off, and the packaging exquisite degree can be obviously improved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a pyrocondensation film packagine machine corner cut mechanism which characterized in that includes: the packaging film cutting device comprises a rack and four groups of corner cutting modules arranged at four corners of the rack, wherein the four groups of corner cutting modules are used for cutting off the four corners of the packaging film;

2. The corner cutting mechanism of the shrink film packaging machine according to claim 1, wherein: the corner cutting board assembly comprises a corner cutting board fixed on the corner cutting module fixing plate and a material bearing platform fixed at the bottom of the corner cutting board.

3. The corner cutting mechanism of the shrink film packaging machine according to claim 2, wherein: the corner cutting mechanism further comprises a waste film collecting module, and the waste film collecting module comprises a first negative pressure device, a material sucking pipe communicated with the first negative pressure device, and a sucking assembly arranged on the corner cutting chopping block; the suction assembly comprises a cavity arranged inside the corner cutting board, a first opening is formed in one side, close to the film clamping block, of the corner cutting board, and a second opening is formed in the bottom of the corner cutting board; the first opening is provided with a vacuum port adjusting plate for adjusting the air volume at the first opening; the second opening is communicated with the material suction pipe.

4. The corner cutting mechanism of the shrink film packaging machine according to claim 1, wherein: the corner cutting driving device comprises a first air cylinder and a third air cylinder which are arranged in parallel and at intervals, a second air cylinder, a film clamping slide way and a film clamping slide block, wherein the driving direction of the second air cylinder is perpendicular to the driving direction of the first air cylinder and the driving direction of the third air cylinder; the first cylinder and the third cylinder are fixed at the bottom of the corner cutting module fixing plate, and the film clamping slide way is positioned between the first cylinder and the third cylinder; the driving end of the second air cylinder is detachably connected with the film clamping sliding block;

5. The corner cutting mechanism of the shrink film packaging machine according to claim 1, wherein: the film clamping block is provided with a vacuum groove on the surface of one side close to the corner cutting board assembly, and the vacuum groove is connected with a second negative pressure device.

6. The corner cutting mechanism of the shrink film packaging machine according to claim 1, wherein: the distance between the four groups of corner cutting modules is adjustable so as to meet the size requirements of products to be packaged with different specifications.

7. A thermal shrinkage film packaging machine is characterized in that: comprising the corner cutting mechanism according to any one of claims 1-6.

8. The shrink film wrapping machine of claim 7 wherein: the film cutting mechanism comprises a film cutting module, a film pulling module and a transplanting film opening module;

9. The shrink film wrapping machine according to claim 7 or 8, wherein: the film covering mechanism comprises a material pushing and shaping module, a material distributing module and a tail film cutting module;

the tail film cutting module comprises a tail film cutter assembly and a tail film lower anvil plate assembly and is used for cutting off the redundant tail film of the film material bag.

10. The shrink film wrapping machine of claim 9 wherein: still including supplying membrane mechanism, supply membrane mechanism be used for doing cut membrane mechanism provides the membrane material, the membrane material includes membrane and lower membrane, just go up membrane and lower membrane and be the enclosed state along one of them one end of membrane material length direction.