CN114394274A

CN114394274A - Convertible packing plant of segmentation meat

Info

Publication number: CN114394274A
Application number: CN202210300178.2A
Authority: CN
Inventors: 蔡磊; 吴韶华
Original assignee: Henan Institute of Science and Technology
Current assignee: Henan Institute of Science and Technology
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-04-26
Anticipated expiration: 2042-03-25
Also published as: CN114394274B

Abstract

The invention discloses a variable-structure packaging device for cutting meat, which comprises a variable-structure plastic packaging device and an operation platform; the variable-structure plastic packaging device is arranged right above the operation platform and comprises three sections of telescopic rods, an inclined rod and a supporting rod; the three sections of telescopic rods are divided into an upper section, a middle section and a lower section which are sequentially connected in a sliding manner; the upper ends of the plurality of inclined rods are sequentially and uniformly hinged in the circumferential direction of the middle section, the middle part of each inclined rod is hinged with one end of the supporting rod, and the other end of the supporting rod is hinged with the lower section; every down tube lower extreme articulates there is the heat-seal mould, has the heat-seal telescopic link between two adjacent heat-seal moulds, and the bottom of heat-seal mould and heat-seal telescopic link all is provided with the plastic envelope heating strip, all plastic envelope heating strips with the figure that surrounds when operation platform contacts and form is closed curve. The variable-structure plastic packaging device is arranged right above the operation platform, so that the divided meat with different sizes can be packaged with different sizes.

Description

Convertible packing plant of segmentation meat

Technical Field

The invention belongs to the technical field of food packaging, and particularly relates to a variable-structure packaging device for dividing meat.

Background

In food processing lines, the role of this link of packaging is more and more attracting attention, and especially, the cut chilled meat needs to be packaged in time to prolong the shelf life of the food, and meanwhile, a layer of protection is added in the transportation process.

On the packing automatic production line among the prior art, can only pack a fixed size cut apart meat, can not be according to the actual size adjustment plastic envelope packing plant of every piece of cut apart meat that will pack for packing size precision is not enough, and too big or undersize appears in the packaging film, and too big packaging film influences people's use and experiences, and other too big cut apart meat then can't carry out direct package, still need cut apart once more.

Disclosure of Invention

The purpose of the invention is as follows: provided is a variable-structure meat-split packaging device which can change the heat-seal size of a package according to the size of split meat to be packaged and is suitable for packaging split meat of different sizes.

The technical scheme of the invention is as follows:

a variable-structure packaging device for cutting meat comprises a variable-structure plastic packaging device and an operation platform; the variable-structure plastic packaging device is arranged right above the operating platform and comprises three sections of telescopic rods, an inclined rod and a supporting rod; the three sections of telescopic rods are divided into an upper section, a middle section and a lower section which are sequentially connected in a sliding manner; the number of the inclined rods and the number of the supporting rods are the same, the upper ends of the inclined rods are sequentially and uniformly hinged to the circumference of the middle section, the middle part of each inclined rod is hinged to one end of one supporting rod, and the other end of each supporting rod is hinged to the lower section; every the lower extreme of down tube articulates there is the heat-seal mould, and two are adjacent be provided with the heat-seal telescopic link between the heat-seal mould, the heat-seal mould with the bottom of heat-seal telescopic link all is provided with the plastic envelope heating strip, all plastic envelope heating strips with the figure that surrounds when operation platform contacts and form is closed curve.

Preferably, the number of the inclined rods and the number of the supporting rods are four.

Set up four down tube and four bracing pieces and just can make the rectangle with corresponding heat-seal mould to make the closed curve that surrounds and form also be the rectangle, cut apart meat finally and pack and also be the rectangle after the shaping, rectangular shape saves space when storage and transportation.

Preferably, a vacuum suction nozzle is arranged on the side surface of the operating platform.

After the vacuum air suction nozzle is arranged, the upper packaging film and the lower packaging film can be vacuumized through the vacuum air suction nozzle, so that vacuum packaging is realized.

Preferably, the cutting device further comprises a frame and a cutting device, the frame is arranged above the operating platform, and the upper sections of the three sections of telescopic rods are fixed to the top of the frame; the cutting device comprises a telescopic knife handle which is fixed at the top of the frame and positioned on the right side of the three telescopic rods and a knife head which is arranged at the end part of the telescopic knife handle, and the knife head stretches across the upper part of the operating platform along the length direction; and a cutter groove corresponding to the cutter head is arranged on the operating platform.

After the cutting device is arranged, the meat can be cut off and separated from other packaging units in time through the cutting device after the meat is packaged.

Preferably, the operating platform is provided with a groove, the groove is arranged right below the heat-sealing die, and each edge of the groove is located outside a maximum closed curve surrounded by all the plastic-sealing heating strips on the operating platform.

The groove is formed in the operation platform, so that the contact surface between the variable-structure plastic package device and the operation platform is located in the groove, packaging and heat sealing can be completed in the groove, and the operation platform is prevented from sliding off when meat is cut into pieces and packaged.

Preferably, a feeding platform is arranged at the left end of the operating platform, and a downward inclined sliding plate is fixed on the right side of the feeding platform; the bottom of the sliding plate is communicated with the groove; an upper film roll is arranged above the top of the sliding plate, and a lower film roll is arranged below the top of the sliding plate; an upper film guide rod is arranged above the bottom of the sliding plate, and a lower film guide rod is arranged below the bottom of the sliding plate; the upper film roll, the lower film roll, the upper film guide rod and the lower film guide rod are parallel to each other and cross over the operating platform.

Through setting up feeding platform and slide, make cut apart meat from the feeding platform directly to the recess through the slide to fall on last packaging film and between the packaging film down, need not manually will cut apart meat and place last packaging film and between the packaging film down, easy operation, and reduced the contact of people with the meat of cutting apart, more sanitary.

Preferably, the length of the cutter head is not less than the width of the upper film roll and the lower film roll; two roller combinations are arranged on the right side of the groove, one roller combination is arranged on the left side of the cutter groove, and the other roller combination is arranged at the right end part of the operating platform; the roller combination comprises a roller bracket, a motor, a long roller, a first short roller and a second short roller; the roller bracket is a first fixing plate and a second fixing plate which are symmetrically and vertically fixed on two side edges of the operating platform; the shaft of the motor is fixedly connected with the long roller, two ends of the long roller are respectively and rotatably connected to the first fixing plate and the second fixing plate, and the first short roller is rotatably connected to the first fixing plate and positioned above the long roller; the second short roller is rotatably connected to the second fixing plate and located above the long roller, the first short roller and one end of the long roller are extruded in a rolling mode, and the second short roller and the other end of the long roller are extruded in a rolling mode.

Set up two roller combinations, roll when can be through two roller combinations, will cut apart meat and its packing through heat-seal packing and remove to operation platform's right-hand side automatically, break away from operation platform after cutting device cuts.

Preferably, the parts of the long roller, which are positioned outside the first fixing plate and the second fixing plate, are respectively fixed with a first gear and a second gear; a third gear is fixed on the part of the first short roller, which is positioned outside the first fixing plate, and the third gear is meshed with the first gear; and a fourth gear is fixed on the part of the second short roller, which is positioned outside the second fixing plate, and the fourth gear is meshed with the second gear. The extrusion and synchronous rotation of the first short roller, the second short roller and the long roller are realized through a gear meshing mode, so that the horizontal movement of an upper packaging film and a lower packaging film can be realized.

Preferably, the surfaces of the long roller, the first short roller and the second short roller are coated with an anti-slip material. After the anti-skidding material is coated, the upper packaging film and the lower packaging film are prevented from skidding when being extruded by the long roller, the first short roller and the second short roller, and the packaged cut meat and the packaged skew caused by different running speeds of two sides due to skidding are prevented.

The invention has the beneficial effects that:

the variable-structure plastic packaging device is arranged right above the operation platform, the middle section and the lower section of the three sections of telescopic rods of the variable-structure plastic packaging device can also stretch in the process of moving downwards, and the relative movement of the middle section and the lower section can cause the closed curve formed by the enclosing of each heat-sealing die and the heat-sealing telescopic rods to change, so that the stretching degree of the middle section and the lower section can be adjusted according to the size of the cut meat, the area size enclosed by the closed curve formed by the enclosing of each heat-sealing die and the heat-sealing telescopic rods can be adjusted, the sizes of the upper packaging film and the lower packaging film can be adjusted according to the size of the cut meat, the cut meat with different sizes can be packaged in different sizes, and the operation is simple.

Drawings

Fig. 1 is a schematic perspective view of a small-sized cut meat packaged by the meat-cutting packaging device of the present invention.

Fig. 2 is a schematic perspective view of the meat-cut packaging device of the present invention for packaging large-sized cut meat.

Fig. 3 is an isometric view of fig. 2.

Fig. 4 is a bottom view of the reconfigurable plastic wrap device of fig. 1.

Fig. 5 is a bottom view of the reconfigurable blister pack apparatus of fig. 2.

Fig. 6 is a schematic structural view of the heat-sealing expansion link in embodiment 1.

In the figure:

1. a variable-structure plastic packaging device; 11. three sections of telescopic rods; 111. an upper section; 112. a middle section; 113. a lower section; 12. a diagonal bar; 13. a support bar; 14. heat-sealing the mold; 15. heat-sealing the telescopic rod; 151. a first telescopic rod; 152. a second telescopic rod; 16. plastically packaging the heating strip; 2. an operating platform; 21. a groove; 22. a cutter groove; 3. a frame; 41. a telescopic knife handle; 42. a cutter head; 51. a feeding platform; 52. a slide plate; 61. winding the film; 62. feeding a film roll; 63. a film feeding guide rod; 64. a lower film guide rod; 7. combining rollers; 71. a motor; 72. a long roller; 73. a first short roller; 74. a second short roller; 76. a second gear; 77. a first fixing plate; 78. a second fixing plate; 79. a third gear; 710. a fourth gear; 8. and a vacuum air suction nozzle.

Detailed Description

The present invention will be described in detail with reference to the following embodiments and the accompanying drawings. Fig. 1 is a schematic perspective view showing a small-sized cut meat packed by the meat-cutting packing apparatus of the present invention, fig. 2 is a schematic perspective view showing a large-sized cut meat packed by the meat-cutting packing apparatus of the present invention, fig. 3 is a perspective view of fig. 2, fig. 4 is a bottom view of the variable-structure plastic packaging apparatus of fig. 1, and fig. 5 is a bottom view of the variable-structure plastic packaging apparatus of fig. 2.

Example 1

As shown in fig. 1, 2, 3, 4 and 5, the transformable packaging device for the divided meat of the invention comprises a transformable plastic packaging device 1 and an operation platform 2; the variable-structure plastic packaging device 1 is arranged right above the operating platform 2 and comprises three sections of telescopic rods 11, an inclined rod 12 and a supporting rod 13; the three sections of telescopic rods 11 are divided into an upper section 111, a middle section 112 and a lower section 113 which are connected in sequence in a sliding manner; the number of the inclined rods 12 and the number of the supporting rods 13 are the same, the upper ends of the inclined rods 12 are sequentially and uniformly hinged to the circumference of the middle section 112, the middle part of each inclined rod 12 is hinged to one end of one supporting rod 13, and the other end of each supporting rod 13 is hinged to the lower section 113; the lower end of each diagonal rod 12 is hinged to a heat-sealing die 14, a heat-sealing telescopic rod 15 is arranged between two adjacent heat-sealing dies 14, and fig. 6 is a schematic structural view of the heat-sealing telescopic rod in the embodiment. As shown in fig. 6, the heat-sealing telescopic rod 15 includes a first telescopic rod 151 and a second telescopic rod 152, the second telescopic rod 152 is a rod with a concave cross section, and has a concave slideway with a downward opening, the first telescopic rod 151 is slidably nested in the concave slideway, the heat-sealing mold 14, the first telescopic rod 151 and the second telescopic rod 152 are all provided with plastic-sealing heating strips 16 at the bottoms, and all the plastic-sealing heating strips 16 are enclosed to form a closed curve when contacting the operation platform 2. The plastic package heating strip 16 is an electric heating strip, and is heated to generate high temperature after being electrified.

The working principle is as follows:

when the device for packaging the cut meat is used for packaging the cut meat, a lower packaging film is firstly paved on an operation platform 2 which is positioned right below a variable-structure plastic packaging device 1, then the cut meat is placed on the lower packaging film, and then an upper packaging film is paved on the upper surface of the cut meat. The three sections of telescopic rods 11 of the variable-structure plastic packaging device 1 are stretched downwards, and in the stretching process, the upper section 111 and the middle section 112 are stretched independently, so that the postures of the inclined rod 12 and the supporting rod 13 are not changed, and the heat-sealing die 14 moves downwards; and, during the stretching, the downward stretching of the middle section 112 with respect to the lower section 113 causes the plurality of diagonal members 12 hinged to the middle section 112 to be spread out all around with the support of the support rods 13, thereby driving a plurality of heat-seal dies 14 hinged at the lower end of the diagonal rod 12 to separate from each other and open towards the periphery (the transformable plastic packaging device is transformed from the state of figure 4 to the state of figure 5), meanwhile, the heat-sealing telescopic rod 15 extends, the variable-structure plastic package device 1 moves downwards integrally to be in contact with the operating platform 2, the upper and lower layers of packaging films coated on the cut meat are pressed together by a closed curve formed by the heat-sealing die 14 and the heat-sealing telescopic rod 15 in a surrounding mode, the cut meat is sealed between the two layers of packaging films, and the plastic package heating strip 16 arranged at the bottoms of the heat-sealing die 14 and the heat-sealing telescopic rod 15 heats and thermally melts the upper and lower layers of packaging films for bonding, so that the cut meat is packaged successfully. Because the middle section 112 and the lower section 113 can also stretch and contract in the process of moving the upper section 111 downwards in the variable-structure plastic packaging device 1, and the relative movement of the middle section 112 and the lower section 113 can cause the closed curve formed by the enclosing of each heat-sealing die 14 and the heat-sealing telescopic rod 15 to change, the relative stretching degree of the middle section 112 and the lower section 113 can be adjusted according to the different cut meat sizes, so that the area size enclosed by the closed curve formed by the enclosing of each heat-sealing die 14 and the heat-sealing telescopic rod 15 can be adjusted, and then the upper packaging film and the lower packaging film can be heated, fused and thermally sealed by heating through the heat-sealing dies 14 and the plastic-sealing heating strips 16 at the bottoms of the heat-sealing telescopic rods 15. Therefore, the sizes of the upper and lower packaging films can be adjusted according to the size of the cut meat, so that the cut meat with different sizes can be packaged with different sizes, and the operation is simple.

Preferably, the number of the inclined bars 12 and the number of the supporting bars 13 are four. When four diagonal bars 12 and four support bars 13 are used, the corresponding heat-sealing dies 14 can be made into a rectangle (as shown in fig. 4 and 5), so that the closed curve formed by the four heat-sealing dies 14 and the heat-sealing telescopic bars 15 can be easily made into a rectangle, and the final cut meat-shaped package is also a rectangle, and is convenient to store and transport. Of course, the number of the diagonal rods 12 and the number of the support rods 13 may be 3, 5 or more, and may be designed according to the final shape of the outer package to be formed.

Preferably, the side of the operation platform 2 is provided with a vacuum suction nozzle 8. Set up vacuum exhaust mouth 8 in operation platform 2's side, can be when variable structure plastic packaging device 1 pushes down to operation platform 2 on, vacuum exhaust mouth 8 stretches into between last packaging film and the lower packaging film, vacuum exhaust mouth 8 bleeds to required vacuum after under the condition that variable structure plastic packaging device 1 pushed down, vacuum exhaust mouth 8 withdraws from outside last packaging film and the lower packaging film, the plastic envelope heating strip 16 heating that heat-seal mould 14 and heat-seal telescopic link 15's bottom set up simultaneously and will go up, two-layer packaging film heat-melt and bonding down, cut apart meat accomplishes vacuum packaging, vacuum packaging can prolong the shelf life of cut apart meat.

Preferably, the packaging device for the cut meat of the present invention may further include a frame 3 and a cutting device, the frame 3 is disposed above the operation platform 2, and the upper section 111 of the three-section telescopic rod 11 is fixed on the top of the frame 3; the cutting device comprises a telescopic knife handle 41 which is fixed on the top of the frame 3 and positioned on the right side of the three-section telescopic rod 11 and a knife head 42 which is arranged at the end part of the telescopic knife handle 41, and the knife head 42 stretches across the upper part of the operating platform 2 along the length direction; the operation platform 2 is provided with a knife groove 22 corresponding to the knife head 42. After the cutting device is arranged, when the cut meat is packaged, after the cut meat is packaged, the cut meat is pulled to the right side of the cutter groove 22 on the operation platform 2, and then the telescopic cutter handle 41 is started to enable the cutter head 42 to descend the tangential cutter groove 22, so that a packaged part of cut meat and the packaged part of cut meat are cut off and separated from another part of cut meat and the packaged part.

Example 2

The meat-splitting packaging unit of the invention can also be designed as a continuous production line, as shown in fig. 1, 2 and 3.

The frame 3 is provided, and the frame 3 is provided above the operation platform 2, and the structure of the variable-structure plastic packaging device 1 is the same as that of embodiment 1. The cutting device is also the same as the embodiment 1, the cutting device is arranged above the operation platform 2 and fixed on the right side of the variable plastic package device 1, and the operation platform 2 is provided with a knife groove 22 corresponding to the knife head 42. A groove 21 is formed in the operating platform 2, the groove 21 is formed right below the heat-sealing die 14, and each edge of the groove 21 is located outside a maximum closed curve surrounded by all the plastic-sealing heating strips 16 on the operating platform 2. Vacuum suction nozzles 8 are provided on the sides of the recess 21. In addition, a feeding platform 51 is arranged at the left end of the operating platform 2, and a downward inclined sliding plate 52 is fixed at the right side of the feeding platform 51; the bottom of the slide plate 52 opens into the groove 21; an upper film roll 61 is arranged above the top of the sliding plate 52, and a lower film roll 62 is arranged below the top of the sliding plate 52; an upper film guide rod 63 is arranged above the bottom of the sliding plate 52, and a lower film guide rod 64 is arranged below the bottom of the sliding plate 52; the upper film roll 61, the lower film roll 62, the upper film guide bar 63 and the lower film guide bar 64 are parallel to each other and cross over the operation platform 2. The length of the cutter head 42 is not less than the width of the upper film roll 61 and the lower film roll 62; two roller combinations 7 are arranged on the right side of the groove 21, wherein one roller combination 7 is arranged on the left side of the cutter groove 22, and the other roller combination 7 is arranged at the right end part of the operating platform 2; the roller combination 7 comprises a roller bracket, a motor 71, a long roller 72, a first short roller 73 and a second short roller 74; the roller bracket is a first fixing plate 77 and a second fixing plate 78 which are symmetrically and vertically fixed on two side edges of the operating platform 2; the shaft of the motor 71 is fixedly connected with the long roller 72, two ends of the long roller 72 are respectively and rotatably connected to the first fixing plate 77 and the second fixing plate 78, and the first short roller 73 is rotatably connected to the first fixing plate 77 and is positioned above the long roller 72; the second short roller 74 is rotatably connected to the second fixing plate 78 and located above the long roller 72, the first short roller 73 is in rolling extrusion with one end of the long roller 72, and the second short roller 74 is in rolling extrusion with the other end of the long roller 72.

The working principle is as follows:

the meat cutting and packaging device of the embodiment is an automatic packaging line. When the packaging is started, the lower packaging film wound on the lower film roll 62 is guided by the lower film guide rod 64 and then laid in the groove 21 on the operation platform 2, and then the long roller 72, the first short roller 73 and the second short roller 74 of the roller combination 7 clamped at the left side of the knife groove 22 are squeezed; meanwhile, the upper packaging film wound on the upper film roll 61 is guided by the upper film guide rod 63 and then laid in the groove 21 on the operation platform 2, and then the long roller 72 of the roller combination 7 clamped at the left side of the knife groove 22 is also squeezed between the first short roller 73 and the second short roller 74. The cut meat is slid down from the feeding platform 51 along the slide plate 52 and dropped between the upper and lower packaging films in the groove 21, and the groove 21 prevents the cut meat from sliding out of the operation platform 2 during the sliding down. Opening the variable-structure plastic package device 1 to enable three sections of telescopic rods 11 of the variable-structure plastic package device 1 to stretch downwards, separating a plurality of heat-seal dies 14 hinged to the lower end of an inclined rod 12 from each other and opening towards the periphery, extending the heat-seal telescopic rods 15 at the same time, moving the variable-structure plastic package device 1 integrally downwards to seal cut meat in a closed curve formed by enclosing the heat-seal dies 14 and the heat-seal telescopic rods 15, enabling a vacuum suction nozzle 8 to extend into a space between an upper package film and a lower package film, after the vacuum suction nozzle 8 sucks air to a required vacuum degree under the condition that the variable-structure plastic package device 1 is pressed downwards, enabling the vacuum suction nozzle 8 to withdraw from the upper package film and the lower package film, heating plastic package heating strips 16 arranged at the bottoms of the heat-seal dies 14 and the heat-seal telescopic rods 15 to melt and bond the upper and lower package films, and completing vacuum package of the cut meat. The long roller 72, the first short roller 73 and the second short roller 74 of the two roller combination 7 rotate simultaneously, and the packaged cut meat continuously moves to the operating platform 2 through rolling extrusion of the long roller 72, the first short roller 73 and the second short roller 74. Meanwhile, the lower packaging film wound on the lower film roll 62 and the upper packaging film wound on the upper film roll 61 are again laid in the groove 21 under the dragging of the above process, so that the cut meat can be slid down again from the feeding platform 51 along the sliding plate 52 and fall between the upper packaging film and the lower packaging film in the groove 21 for the next packaging. The telescopic handle 41 causes the cutting head 42 to lower the tangential knife slot 22, thereby cutting a portion of the cut meat and its package, which is packaged, away from another portion of the cut meat and its package. The rolling compression of the roller assembly 7 located to the right of the knife slot 22 moves the cut meat pieces and their packages further to the right under the platform 2 where they are received by the containers. So that the continuous operation can realize the pipeline operation.

The rolling extrusion of the long roller 72 and the first and second short rollers 73 and 74 can be realized by adopting the following structure: a first gear and a second gear 76 are respectively fixed on the parts of the long roller 72, which are positioned outside the first fixing plate 77 and the second fixing plate 78; a third gear 79 is fixed on the part of the first short roller cylinder 73, which is positioned outside the first fixing plate 78, and the third gear 79 is meshed with the first gear; a fourth gear 710 is fixed to a portion of the second stub roller 74 located outside the second fixing plate 78, and the fourth gear 710 is engaged with the second gear 76.

In operation, the motor 71 rotates to drive the long roller 72 to rotate, and the first gear and the second gear 76 fixed at two ends of the long roller rotate, so that the third gear 79 and the fourth gear 710 engaged with each other also rotate, and further drive the first short roller 73 and the second short roller 74 to rotate respectively and extrude with the long roller 72. Of course, other transmission methods can be used to make the long roller 72 roll and press with the first short roller 73 and the second short roller 74, for example, different driving devices can be used to drive the rollers respectively.

Preferably, the surfaces of the long roller tube 72, the first short roller tube 73 and the second short roller tube 74 are coated with an anti-slip material. After the anti-slip material is coated, the friction force between the upper packaging film and the first short roller 73 and the second short roller 74 is favorably increased, and the friction force between the lower packaging film and the long roller 72 is favorably increased, so that the packaged finished product is easier to move on the operation platform 2.

It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. For example, the packaging device for the cut meat can be combined with a vision sensor and a computer control system, the vision sensor scans to obtain the size of the pre-packaged cut meat, the obtained size is transmitted to the computer control system, and the computer control system controls the size of the area surrounded by the closed curve formed by the enclosing of each heat-sealing die and the heat-sealing telescopic rod on the variable plastic packaging device, so that the cut meat is packaged fully automatically and accurately. For another example, the heat-sealing telescopic rod may be arranged in other manners, such as arranging a slide way of the heat-sealing telescopic rod at the bottom of the heat-sealing mold, completing the relative change of the distance between two adjacent heat-sealing molds through the sliding of the heat-sealing telescopic rod relative to the heat-sealing mold, and simultaneously keeping a closed curve of a figure formed by enclosing all the plastic-sealing heating strips when the plastic-sealing heating strips are in contact with the operating platform. In addition, the technical features related to the embodiments of the present invention described above may be combined with each other as long as they do not conflict with each other. In addition, the above embodiments are only some embodiments of the present invention, not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

Claims

1. A variable-structure packaging device for cutting meat is characterized by comprising a variable-structure plastic packaging device and an operation platform; the variable-structure plastic packaging device is arranged right above the operating platform and comprises three sections of telescopic rods, an inclined rod and a supporting rod; the three sections of telescopic rods are divided into an upper section, a middle section and a lower section which are sequentially connected in a sliding manner; the number of the inclined rods and the number of the supporting rods are the same, the upper ends of the inclined rods are sequentially and uniformly hinged to the circumference of the middle section, the middle part of each inclined rod is hinged to one end of one supporting rod, and the other end of each supporting rod is hinged to the lower section; every the lower extreme of down tube articulates there is the heat-seal mould, and two are adjacent be provided with the heat-seal telescopic link between the heat-seal mould, the heat-seal mould with the bottom of heat-seal telescopic link all is provided with the plastic envelope heating strip, all plastic envelope heating strips with the figure that surrounds when operation platform contacts and form is closed curve.

2. The meat-splitting packaging device as set forth in claim 1, wherein said diagonal bars and said support bars are four in number.

3. The apparatus for packaging meat portions as claimed in claim 2, wherein the operation platform is provided with a vacuum nozzle at a side thereof.

4. The meat division packaging apparatus as claimed in claim 3, further comprising a frame and a cutting means, said frame being disposed above said operation platform, an upper section of said three telescopic rods being fixed to a top of said frame; the cutting device comprises a telescopic knife handle which is fixed at the top of the frame and positioned on the right side of the three telescopic rods and a knife head which is arranged at the end part of the telescopic knife handle, and the knife head stretches across the upper part of the operating platform along the length direction; and a cutter groove corresponding to the cutter head is arranged on the operating platform.

5. The meat dividing packaging apparatus as claimed in claim 4, wherein said operation platform is provided with a groove, said groove is provided directly below said heat-sealing mold, and each edge of said groove is located outside a maximum closed curve surrounded by all the plastic-sealed heating strips on said operation platform.

6. The cut meat packaging device of claim 5, wherein a feeding platform is arranged at the left end of the operating platform, and a downward inclined sliding plate is fixed at the right side of the feeding platform; the bottom of the sliding plate is communicated with the groove; an upper film roll is arranged above the top of the sliding plate, and a lower film roll is arranged below the top of the sliding plate; an upper film guide rod is arranged above the bottom of the sliding plate, and a lower film guide rod is arranged below the bottom of the sliding plate; the upper film roll, the lower film roll, the upper film guide rod and the lower film guide rod are parallel to each other and cross over the operating platform.

7. The meat split packaging apparatus as claimed in claim 6, wherein said cutter head has a length not less than a width of said upper and lower rolls; two roller combinations are arranged on the right side of the groove, one roller combination is arranged on the left side of the cutter groove, and the other roller combination is arranged at the right end part of the operating platform; the roller combination comprises a roller bracket, a motor, a long roller, a first short roller and a second short roller; the roller bracket is a first fixing plate and a second fixing plate which are symmetrically and vertically fixed on two side edges of the operating platform; the shaft of the motor is fixedly connected with the long roller, two ends of the long roller are respectively and rotatably connected to the first fixing plate and the second fixing plate, and the first short roller is rotatably connected to the first fixing plate and positioned above the long roller; the second short roller is rotatably connected to the second fixing plate and located above the long roller, the first short roller and one end of the long roller are extruded in a rolling mode, and the second short roller and the other end of the long roller are extruded in a rolling mode.

8. The meat division packaging apparatus as claimed in claim 7, wherein a first gear and a second gear are fixed to the long roller at portions outside the first fixing plate and the second fixing plate, respectively; a third gear is fixed on the part of the first short roller, which is positioned outside the first fixing plate, and the third gear is meshed with the first gear; and a fourth gear is fixed on the part of the second short roller, which is positioned outside the second fixing plate, and the fourth gear is meshed with the second gear.

9. The meat portioning packaging apparatus of claim 8 wherein the surfaces of the long roller, the first short roller, and the second short roller are coated with a non-slip material.