Full-automatic packaging machine with packaging pre-tightening function

Abstract

The invention discloses a full-automatic packaging machine with a packaging pre-tightening function, and relates to the technical field of full-automatic packaging machines, the full-automatic packaging machine is used for packaging materials, the full-automatic packaging machine comprises a sealing and cutting device, a thermal shrinkage device, a feeding conveyor and a discharging conveyor, when the materials are packaged, the feeding conveyor is used for feeding, and the discharging conveyor is used for discharging the materials; and when the material is conveyed to a sealing and cutting station, the material is firstly coated by the folding film, heat sealing is performed after coating is completed, and an exhaust groove is reserved in a sealing line in the heat sealing process, so that subsequent heat shrinkage exhaust is facilitated. After heat sealing is completed, a single package is formed, the single package is fed into a heat shrinkage device and is pre-tightened through local pressure application, the influence on subsequent folded film heat shrinkage efficiency is prevented, during heat shrinkage, only half of the material is inserted into a heat shrinkage cavity at a time, the other part of the material is not subjected to heat shrinkage, and after the part of the material is subjected to heat shrinkage, the other half of the material is subjected to heat shrinkage. And the material is prevented from pressing on the folded film to influence the shrinkage quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of full-automatic packing machine, in particular to a full-automatic packing machine with packaging pre-tightening function. BACKGROUND

[0002] The full-automatic packing machine is generally used in the process of packing articles, and through a preset control program, the full-automatic packing machine can automatically perform operations such as article identification, positioning, packing and sealing, and through continuous packing, the full-automatic packing machine can reduce manual intervention and improve packing operation efficiency, and thus the full-automatic packing machine is widely applied in various industries.

[0003] However, the quality requirements for packing are different in each application field, when packing printed matters such as books, the large gaps between the printed matters will cause the volume to be too large if directly packed, and when the heat-shrinkable film used for packing is packed, the heat-shrinkable film is generally only attached to the surface of the printed matters through the shrinkage force, and the heat-shrinkable film is extremely susceptible to the influence of the weight of the printed matters, which will cause incomplete shrinkage, and even will cause local bulging or broken packing. At present, when heat-shrinking, a conveying roller is generally used for conveying to reduce the contact area, but the single contact point is too many, and the local pressure is too large, which will also affect the shrinkage quality of the heat-shrinkable film.

[0004] In addition, at present, when heat-shrinking, a conveying roller is generally used for conveying to reduce the contact area, but the single contact point is too many, and the local pressure is too large, which will also affect the shrinkage quality of the heat-shrinkable film. SUMMARY

[0005] The present application aims to provide a full-automatic packing machine with packaging pre-tightening function to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A full-automatic packing machine with packaging pre-tightening function, the full-automatic packing machine is used for packing materials, and the full-automatic packing machine comprises a sealing and cutting device, a heat-shrinking device, an inlet conveying machine and an outlet conveying machine, the inlet conveying machine and the outlet conveying machine are respectively located on the two sides of the heat-shrinking device, the sealing and cutting device is connected with the inlet conveying machine, the heat-shrinking device comprises a shell, the shell is provided with a heat-shrinking cavity, and half of the material to be packed is inserted into the heat-shrinking cavity.

[0007] When packing the material, the inlet conveying machine is used for feeding, when the material is sent to the sealing and cutting station, the material is first wrapped by the folded film, and after the wrapping is completed, the material is heat-sealed, an exhaust groove is reserved in the sealing line during the heat-sealing process, which facilitates subsequent heat-shrinking exhaust. After the heat-sealing is completed, a single package is formed, and the single package is sent into the heat-shrinking device, and the single package is pre-tightened by local pressure, so as to prevent the heat-shrinking efficiency of the folded film from being affected, and when heat-shrinking, only half of the material is inserted into the heat-shrinking cavity, and the other part is not heat-shrunk, and when the heat-shrinking of the other part is completed, the heat-shrinking of the other half is performed, so as to prevent the material from being pressed on the folded film and affecting the shrinkage quality.

[0008] Further, the sealing and cutting device comprises a unwinding assembly and a hot cutting assembly, the unwinding assembly is connected with the frame of the feeding conveyor, the unwinding assembly comprises a film roller, a film separating rod and two triangular plates, the film roller is rotationally connected with the feeding conveyor, the film roller is used for conveying the folded film, the film separating rod is fixedly connected with the feeding conveyor, the film separating rod is used for separating the two layers of the folded film, the two triangular plates are fixedly connected with the feeding conveyor respectively, and the two triangular plates are located on the upper and lower sides of the conveying belt of the feeding conveyor. The hot cutting assembly comprises a lifting cylinder and a sealing and cutting knife, the lifting cylinder is fixedly connected with the frame of the feeding conveyor, the sealing and cutting knife is arranged on the conveying end of the lifting cylinder, the sealing and cutting knife is internally provided with an electric heating wire, and the sealing and cutting knife is in the shape of 'L'.

[0009] The unwinding assembly is installed on the feeding conveyor, the unwinding assembly is used for unwinding the folded film, the folded film is formed by folding and winding a single layer of film, and three edges of the folded film need to be hot sealed after being cut. In the initial state, the folded film is wound on the film roller, after being unwound, the folded film is guided by a plurality of auxiliary rollers, the two layers of the folded film are separated by the film separating rod, and finally the folded film is guided by the two triangular plates. The feeding conveyor adopts a double-conveyor mode, and there is a film gap between the two conveyors. The upper layer of the folded film is guided by the upper triangular plate, and the lower layer of the folded film is guided by the gap between the two conveyors and then guided to the surface of the other conveyor. When the material is pressed on the lower layer of the folded film, the folded film is unwound under the action of tension as the material moves. When the material wrapped by the folded film enters the sealing and cutting station, the sealing and cutting knife is vertically moved by the lifting cylinder, the electric heating wire in the sealing and cutting knife is powered to heat, so that the sealing and cutting knife automatically seals when cutting the folded film, and a small channel is left on the sealing line to facilitate exhaust. The 'L' shape arrangement enables the sealing and cutting knife to perform two-side hot sealing in a single downward movement. When the conveying belt moves again, the sealing and cutting knife performs hot sealing again, thereby assisting the previous hot sealing to perform three-side hot sealing. After being cut, a single package is formed.

[0010] Further, the heat shrinkage device further comprises a driving assembly, the driving assembly comprises a driving motor and a main rotating disc, the driving motor is fixedly connected with the shell, the output end of the driving motor is in transmission connection with the main rotating disc, the shell is provided with a main rotating groove, the main rotating disc is in rotation connection with the main rotating groove, the main rotating disc is provided with a sub rotating groove, and the sub rotating groove is provided with an opening on the outer side.

[0011] The shell is arranged between the feeding conveyor and the discharging conveyor. When the material forming a single package enters the sub rotating groove, the material is pre-tightened by being pressed downward, the packaging performance is improved, the material is continuously put into the heat shrinkage cavity by driving the main rotating disc to rotate by the driving motor, the material is heated and shrunk, and the material is continuously packaged by rotating the main rotating disc, thereby improving the packaging performance.

[0012] Further, the heat shrink device further comprises a sub-rotation assembly, the sub-rotation assembly is provided with a plurality of groups, the sub-rotation assembly comprises a mounting frame and a sub-rotation motor, the main rotating disc is provided with a plurality of sub-rotation grooves, the sub-rotation motor is arranged in the sub-rotation groove, the output end of the sub-rotation motor is in transmission connection with the mounting frame, the mounting frame is in rotation connection with the sub-rotation groove, and the vertical center surface of the mounting frame coincides with the vertical center surface of the material to be packaged.

[0013] By arranging the sub-rotation assembly to adjust the direction of the material, when the material is moved forward by the feeding conveyor, the material is inserted into the mounting frame and enters the heat shrink cavity along with the main rotating disc, the material is single-sidedly supported by the mounting frame, the outside of the material inserted into the heat shrink cavity is folded against the floating film, hot air is introduced to make the folded film shrink by heat and discharge gas from the small channel in the sealing line, so that the folded film is only subjected to the shrinkage force of itself during the shrinkage process and is not affected by the gravity of the object, thereby preventing the generation of a bulge, uneven shrinkage, and even the breaking of the folded film. After the shrinkage of the first half is completed, the mounting frame is driven to rotate by the sub-rotation motor, so that the unshrunken part is turned into the heat shrink cavity, at this time, the part that has been shrunk serves as a bearing base, and the unshrunken part is still in a floating state, so that the shrinkage is carried out without pressure, thereby improving the uniformity of shrinkage.

[0014] Further, the sub-rotation assembly further comprises a pressing cylinder, the pressing cylinder is in fastening connection with the mounting frame, and the output end of the pressing cylinder is provided with a pressing plate.

[0015] The pressing cylinder is mounted by the mounting frame, when the material is input into the mounting frame by the feeding conveyor, the pressing plate is driven downward by the pressing cylinder, the material is pressed by the pressing plate, the material is bidirectionally clamped by the pressing plate and the mounting frame, so that the material is pre-tightened for packaging, the folded film is easily shrunk and tightened, and the packaging forming volume is reduced.

[0016] Further, the heat shrink device further comprises a sealing strip, the two sides of the mounting frame are respectively provided with sliding grooves, the sealing strip is provided with a plurality of sealing strips, the plurality of sealing strips are in sliding connection with the sliding grooves on the two sides, adjacent sealing strips are in sliding connection, and the inner side of the sealing strip is provided with a transmission inclined surface.

[0017] By setting the sealing strip and installing in the sliding groove, through the sliding connection, when the material enters the mounting frame, the sealing strip is set according to the shape of the material on both sides, the local hot air insulation quality is improved, so that the material can be single-section heat-shrunk, the other section is supported, and the heat-shrunk part is always in the floating state and is not affected by the gravity of the material. When the heat-shrinking is completed, the main turntable moves the material to the side of the discharge conveyor, the material is attached to the conveying belt of the discharge conveyor, the lower pressing cylinder moves on the pressing plate, and the material is moved forward with the discharge conveyor under the action of friction, which is convenient for continuous packaging. By setting the transmission slope, when the material is inserted into the mounting frame, the sealing strip is opened to both sides through the transmission of the transmission slope, so that the sealing strip is automatically sealed according to the outer edge of the material under the action of gravity.

[0018] As an optimization, the sliding groove is inclinedly arranged, and the outer layer of the sliding groove is higher than the inner layer. By setting the sliding groove, the sealing strip moves in the sliding groove under the action of gravity, which is convenient for adjusting according to the shape of the material.

[0019] As an optimization, the heat-shrinking device further comprises a hot air blower, and the hot air blower is in communication with the heat-shrinking cavity. By setting the hot air blower to heat air and guide the hot air flow into the heat-shrinking cavity, the folded film is automatically shrunk under the action of hot air and attached to the surface of the material.

[0020] As an optimization, the shell is provided with a hot air outlet, and the hot air outlet is provided with one along the upper and lower walls of the heat-shrinking cavity, and the hot air blower is in communication with the heat-shrinking cavity through the hot air outlet. By setting the hot air outlet, the side close to the pre-tightening center is shrunk first during the shrinking, so that the folded film at the end is shrunk towards the center of the material, and the small channel during heat sealing is generally located at the two ends, which improves the exhaust efficiency and prevents bubbles from being generated due to incomplete exhaust.

[0021] Compared with the prior art, the present application has the beneficial effects that: when heat shrinking, only half of the materials are inserted into the heat shrinking cavity at one time, and the other half is not heat shrunk, and when the heat shrinking of the half is completed, the heat shrinking of the other half is carried out, preventing the materials from pressing on the folded film, affecting the shrinking quality; when the feeding conveyor moves the materials forward, the materials are inserted into the mounting frame and enter the heat shrinking cavity with the main rotating disc, the materials in the heat shrinking cavity are supported on one side by the mounting frame, and the folded film outside the materials is in a floating state, hot air is introduced to make the folded film shrink by heat and discharge the gas from the small channels in the sealing line, so that the folded film only receives the shrinking force of itself during the shrinking process and is not affected by the gravity of the materials, preventing the generation of bulges, uneven shrinking, and even the breaking of the folded film; after the shrinking of the half is completed, the mounting frame is driven to rotate by the sub-rotating motor, so that the unshrunk part is turned into the heat shrinking cavity, and the part that has been shrunk serves as a bearing base, and the unshrunk part is still in a floating state, so that the unshrunk part is shrunk without pressure, improving the uniformity of shrinking; the pressing plate is driven downward by the downward cylinder, the pressing plate presses the materials, and the materials are clamped in two directions by the pressing plate and the mounting frame, so that the materials are pre-tightened for packaging, facilitating the heat shrinking and tightening of the folded film, and reducing the volume of the packaging formed body. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the sealing and cutting device structure of the present application; Figure 3 It is a schematic diagram of the unwinding assembly structure of the present application; Figure 4 It is a schematic diagram of the heat shrinking device structure of the present application; Figure 5 It is a schematic diagram of the power input of the main rotating disc of the present application; Figure 6 It is a schematic diagram of the sub-rotating assembly structure of the present application; Figure 4 It is an enlarged view of the local part A of the view; Figure 7 It is a schematic diagram of the sub-rotating assembly structure of the present application.

[0023] In the figure: 1, sealing and cutting device; 11, unwinding assembly; 111, film roller; 112, film separating rod; 113, triangular plate; 12, heat cutting assembly; 121, lifting cylinder; 122, sealing and cutting knife; 2, heat shrinking device; 21, shell; 211, main rotating groove; 212, heat shrinking cavity; 213, hot air inlet; 22, driving assembly; 221, driving motor; 222, main rotating disc; 2221, sub-rotating groove; 23, sub-rotating assembly; 231, mounting frame; 2311, sliding groove; 232, sub-rotating motor; 233, downward cylinder; 234, pressing plate; 24, hot air blower; 25, sealing strip; 251, transmission inclined surface; 3, feeding conveyor; 4, discharging conveyor. DETAILED DESCRIPTION

[0024] All other embodiments obtained by those of ordinary skill in the art without creative work based on the embodiments in the present application fall within the scope of protection of the present application.

[0025] Embodiment: As shown in the figure, the present application provides a full-automatic packing machine with packaging pre-tightening function. Figures 1-7

[0026] A full-automatic packing machine with packaging pre-tightening function, the full-automatic packing machine is used for packaging materials, and the full-automatic packing machine comprises a sealing and cutting device 1, a heat shrinking device 2, a feeding conveyor 3 and a discharging conveyor 4, the feeding conveyor 3 and the discharging conveyor 4 are respectively located on the two sides of the heat shrinking device 2, the sealing and cutting device 1 is connected with the feeding conveyor 3, and the heat shrinking device 2 comprises a shell 21, the shell 21 is provided with a heat shrinking cavity 212, and half of the material to be packaged is inserted into the heat shrinking cavity 212.

[0027] When the material is packaged, the feeding conveyor 3 is used for feeding, when the material is sent to the sealing and cutting station, the material is first wrapped by folding the film, and then the heat sealing is performed after the wrapping is completed, an exhaust groove is reserved in the sealing line during the heat sealing process, so that subsequent heat shrinking exhaust is facilitated. After the heat sealing is completed, a single package is formed, which is sent into the heat shrinking device 2, and is pre-tightened by local pressure, so as to prevent the heat shrinking efficiency of the folded film in the subsequent process from being affected. When the heat shrinking is performed, only half of the material is inserted into the heat shrinking cavity 212 at a time, and the other part is not subjected to heat shrinking. When the heat shrinking of the other part is completed, the heat shrinking of the other half is performed again, so as to prevent the material from being pressed on the folded film and affecting the shrinking quality.

[0028] Further, the sealing and cutting device 1 comprises a unwinding assembly 11 and a hot cutting assembly 12, the unwinding assembly 11 is connected with the frame body of the feeding conveyor 3, the unwinding assembly 11 comprises a film roller 111, a film separating rod 112 and two triangular plates 113, the film roller 111 is rotationally connected with the feeding conveyor 3, the film roller 111 is used for conveying the folded film, the film separating rod 112 is fixedly connected with the feeding conveyor 3, the film separating rod 112 is used for separating the two layers of the folded film, and the two triangular plates 113 are respectively fixedly connected with the feeding conveyor 3 and are located on the upper side and the lower side of the conveying belt of the feeding conveyor 3. The hot cutting assembly 12 comprises a lifting cylinder 121 and a sealing and cutting knife 122, the lifting cylinder 121 is fixedly connected with the frame body of the feeding conveyor 3, the lifting cylinder 121 is provided with the sealing and cutting knife 122 at the conveying end, the sealing and cutting knife 122 is internally provided with an electric heating wire, and the sealing and cutting knife 122 is in the shape of “L”.

[0029] ​The unwinding assembly 11 is installed through the feeding conveyor 3, and the unwinding assembly 11 is used for unwinding the folded film, the folded film is a single-layer film folded and rolled, and three-edge heat sealing is required after hot cutting. In the initial state, the folded film is wound on the film roller 111, after unwinding, a plurality of auxiliary rollers are arranged for guiding, then the two layers of film are separated through the film separating rod 112, and finally guided through the two triangular plates 113, the feeding conveyor 3 adopts a double conveyor mode, and there is a film gap between the two conveyors. The upper layer of the folded film is guided by the upper triangular plate 113, and the lower layer of the folded film is guided to the surface of the other conveyor through the gap between the two conveyors. When the material is pressed on the lower layer of the folded film, the folded film is unwound under the action of tension as the material moves. When the folded film wrapped with the material enters the sealing and cutting station, the sealing and cutting knife 122 is vertically moved by the lifting cylinder 121, the electric heating wire in the sealing and cutting knife 122 is powered to heat, so that the sealing and cutting knife 122 automatically seals when cutting the folded film, and a small channel is left on the sealing line to facilitate exhaust. Through the "L" arrangement, the sealing and cutting knife 122 can perform two-side heat sealing in a single downward movement, and when the conveying belt moves again, the three-side heat sealing is performed again, and after cutting, a single package is formed.

[0030] Further, the heat shrinkage device 2 further comprises a driving assembly 22, the driving assembly 22 comprises a driving motor 221 and a main rotating disc 222, the driving motor 221 and the shell 21 are fixedly connected, the output end of the driving motor 221 and the main rotating disc 222 are in transmission connection, the shell 21 is provided with a main rotating groove 211, the main rotating disc 222 and the main rotating groove 211 are in rotary connection, and the main rotating disc 222 is provided with a sub-rotating groove 2221.

[0031] The shell 21 is arranged between the feeding conveyor 3 and the discharging conveyor 4, when the material forming a single package enters the sub-rotating groove 2221, the material is pre-tightened by being pressed downward, the packaging performance is improved, the material is continuously put into the heat shrinkage cavity 212 by driving the main rotating disc 222 to rotate through the driving motor 221, heating and shrinking are performed, and continuous packaging is performed through the rotation of the main rotating disc 222, thereby improving the packaging performance.

[0032] Further, the heat shrinkage device 2 further comprises a sub-rotating assembly 23, the sub-rotating assembly 23 is arranged in a plurality of groups, the sub-rotating assembly 23 comprises a mounting frame 231 and a sub-rotating motor 232, the main rotating disc 222 is provided with a plurality of sub-rotating grooves 2221, the sub-rotating motor 232 is arranged in the sub-rotating groove 2221, the output end of the sub-rotating motor 232 and the mounting frame 231 are in transmission connection, the mounting frame 231 and the sub-rotating groove 2221 are in rotary connection, and the vertical center surface of the mounting frame 231 coincides with the vertical center surface of the material to be packaged.

[0033] The material is reversed and adjusted by setting the sub-rotation assembly 23. When the feeding conveyor 3 carries the material forward, it is inserted into the mounting frame 231 and enters the heat-shrinking cavity 212 with the main rotating disc 222. The material is single-sidedly supported by the mounting frame 231, and the material inserted into the heat-shrinking cavity 212 is folded outside the floating film, hot air is introduced to make the folded film shrink by heat, and the gas is discharged from the small channel in the sealing line, so that the folded film only receives its own shrinkage force during the shrinkage process and is not affected by the gravity of the object, preventing the generation of bulges, uneven shrinkage, and even the breaking of the folded film. After the shrinkage of the front half is completed, the mounting frame 231 is driven to rotate by the sub-rotation motor 232, so that the unshrunk part is turned into the heat-shrinking cavity 212. At this time, the part that has been shrunk serves as a bearing base, and the unshrunk part is still in a floating state, thereby achieving pressureless shrinkage and improving shrinkage uniformity.

[0034] Further, the sub-rotation assembly 23 further comprises a pressing cylinder 233, the pressing cylinder 233 is fixedly connected with the mounting frame 231, and the output end of the pressing cylinder 233 is provided with a pressing plate 234. The pressing plate 234 faces the upper surface of the packaged material, and the vertical center surface of the pressing plate 234 coincides with the vertical center surface of the mounting frame 231.

[0035] The pressing cylinder 233 is installed by the mounting frame 231. When the feeding conveyor 3 inputs the material into the mounting frame 231, the pressing plate 234 is driven downward by the pressing cylinder 233, the material is pressed by the pressing plate 234, and the material is bidirectionally clamped by the pressing plate 234 and the mounting frame 231, thereby pre-tightening the material for packaging, facilitating the heat-shrinking and tightening of the folded film, and reducing the packaging forming volume.

[0036] Further, the heat-shrinking device 2 further comprises a sealing strip 25, and the two sides of the mounting frame 231 are respectively provided with a sliding groove 2311. The sealing strip 25 is provided with a plurality of sealing strips 25, the plurality of sealing strips 25 are respectively connected with the sliding grooves 2311 on the two sides in a sliding manner, adjacent sealing strips 25 are connected in a sliding manner, and the inner side of the sealing strip 25 is provided with a transmission inclined surface 251.

[0037] By setting the sealing strip 25 and installing it in the sliding groove 2311, through the sliding connection, when the material enters the mounting frame 231, the sealing strip 25 is set according to the shape of the material on both sides, which improves the local hot air insulation quality, so that the material can be subjected to single-stage heat shrinkage, and the other stage is supported to ensure that the heat shrinkage part is always in a floating state and is not affected by the gravity of the material. When the heat shrinkage is completed, the main turntable 222 moves the material to one side of the discharge conveyor 4, and the material is attached to the conveying belt of the discharge conveyor 4. The lower pressing cylinder 233 drives the pressing plate 234 to move upwards, and the material is moved forward under the action of friction, which facilitates continuous packaging. By setting the transmission slope 251, when the material is inserted into the mounting frame 231, the transmission slope 251 is driven to push the sealing strip 25 to open to both sides, so that the sealing strip 25 is automatically sealed according to the outer edge of the material under the action of gravity.

[0038] As an optimization, the sliding groove 2311 is inclinedly arranged, and the outer layer of the sliding groove 2311 is higher than the inner layer. By setting the sliding groove 2311, the sealing strip 25 moves in the sliding groove 2311 under the action of gravity, which facilitates adjustment according to the shape of the material.

[0039] As an optimization, the heat shrinkage device 2 further comprises a hot air blower 24, and the hot air blower 24 is in pipeline communication with the heat shrinkage cavity 212. By setting the hot air blower 24 to heat air and guide hot air flow into the heat shrinkage cavity 212, the folded film is automatically shrunk under the action of hot air and attached to the surface of the material.

[0040] As an optimization, the shell 21 is provided with a hot air outlet 213, and the hot air outlet 213 is provided with one along the upper and lower walls of the heat shrinkage cavity 212. The hot air blower 24 is in communication with the heat shrinkage cavity 212 through the hot air outlet 213. By setting the hot air outlet 213, the side close to the pre-tightening center is first shrunk during shrinkage, so that the folded film at the end is shrunk towards the center of the material. The small channel during heat sealing is generally located at the two ends, which improves the exhaust efficiency and prevents bubbles from being generated due to incomplete exhaust.

[0041] The working principle of the present application is as follows: when heat shrinking is performed, only half of the material is inserted into the heat shrinking cavity 212 at one time, and the other half is not subjected to heat shrinking. When the heat shrinking of the other half is completed, the heat shrinking of the other half is performed again, so as to prevent the material from being pressed on the folded film by itself and affecting the shrinking quality. When the feeding conveyor 3 carries the material forward, the material is inserted into the mounting frame 231 and enters the heat shrinking cavity 212 along with the main rotating disc 222. The material is supported on one side by the mounting frame 231. The material outside the heat shrinking cavity 212 is in a floating state. Hot air is introduced to make the folded film shrink and discharge the gas from the small channels in the sealing line, so that the folded film is only subjected to the shrinkage force of itself during the shrinking process and is not affected by the gravity of the material, thereby preventing the generation of bulges, uneven shrinking, and even the breaking of the folded film. After the shrinking of the first half is completed, the mounting frame 231 is driven to rotate by the sub-rotating motor 232, so that the unshrunk part is turned into the heat shrinking cavity 212. The part that has been shrunk serves as a bearing base, and the unshrunk part is still in a floating state, so that the unshrunk part is subjected to pressureless shrinking, thereby improving the uniformity of the shrinking. The pressing plate 234 is driven downward by the downward pressing cylinder 233, and the pressing plate 234 presses the material. The material is clamped in two directions by the pressing plate 234 and the mounting frame 231, so as to pre-tighten the material for packaging, facilitate the heat shrinking and tightening of the folded film, and reduce the volume of the packaging formed body.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A full-automatic packing machine with a packing pre-tightening function, the full-automatic packing machine being used for packing materials, characterized in that: The full-automatic packing machine includes a sealing and cutting device (1), a heat shrinking device (2), a feeding conveyor (3) and a discharging conveyor (4), the feeding conveyor (3) and the discharging conveyor (4) are respectively located on both sides of the heat shrinking device (2), the sealing and cutting device (1) is connected with the feeding conveyor (3), the heat shrinking device (2) includes a shell (21), a driving assembly (22) and a sub-rotation assembly (23), the shell (21) is provided with a heat shrinking cavity (212), and half of the material to be packaged is inserted into the heat shrinking cavity (212); the driving assembly (22) includes a main rotating disc (222), the shell (21) is provided with a main rotating groove (211), the main rotating disc (222) is rotationally connected with the main rotating groove (211), and the sub-rotation assembly (23) is provided with a plurality of groups; the sub-rotation assembly (23) includes a mounting frame (231), the main rotating disc (222) is provided with a plurality of sub-rotation grooves (2221), the mounting frame (231) is rotationally connected with the sub-rotation grooves (2221), and the vertical center surface of the mounting frame (231) coincides with the vertical center surface of the material to be packaged.

2. The fully automatic packing machine with the packing pre-tightening function according to claim 1, characterized in that: The sealing and cutting device (1) includes a unwinding assembly (11) and a hot cutting assembly (12), the unwinding assembly (11) is connected with the frame body of the feeding conveyor (3), the unwinding assembly (11) includes a film roller (111), a film separation rod (112) and a triangular plate (113), the film roller (111) is rotationally connected with the feeding conveyor (3) and is used for conveying the folded film, the film separation rod (112) is fixedly connected with the feeding conveyor (3) and is used for separating the two layers of the folded film, and the two triangular plates (113) are fixedly connected with the feeding conveyor (3) and are located on the upper side and the lower side of the conveying belt of the feeding conveyor (3). The hot cutting assembly (12) includes a lifting cylinder (121) and a sealing and cutting knife (122), the lifting cylinder (121) is fixedly connected with the frame body of the feeding conveyor (3), the sealing and cutting knife (122) is arranged at the conveying end of the lifting cylinder (121), the sealing and cutting knife (122) is internally provided with an electric heating wire, and the sealing and cutting knife (122) is in the shape of "L".

3. The fully automatic packing machine with the packing pre-tightening function according to claim 2, characterized in that: The driving assembly (22) includes a driving motor (221), the driving motor (221) is fixedly connected with the shell (21), the output end of the driving motor (221) is transmissionally connected with the main rotating disc (222), the main rotating disc (222) is provided with the sub-rotation grooves (2221), and the sub-rotation grooves (2221) are provided with an opening on the outer side.

4. The fully automatic packing machine with the packing pre-tightening function according to claim 3, characterized in that: The sub-rotation assembly (23) includes a sub-rotation motor (232), the sub-rotation motor (232) is arranged in the sub-rotation groove (2221), and the output end of the sub-rotation motor (232) is transmissionally connected with the mounting frame (231).

5. The fully automatic packing machine with the packing pre-tightening function according to claim 4, characterized in that: The sub-translating assembly (23) further comprises a pressing cylinder (233) which is fixedly connected with the mounting frame (231) and has a pressing plate (234) at an output end thereof, the pressing plate (234) faces the upper surface of the material with the packaging, and the vertical center surface of the pressing plate (234) coincides with the vertical center surface of the mounting frame (231).

6. The fully automatic packing machine with the packing pre-tightening function according to claim 5, characterized in that: The heat-shrinking device (2) further comprises sealing strips (25), both sides of the mounting frame (231) are respectively provided with sliding grooves (2311), and the sealing strips (25) are provided in plurality, the sealing strips (25) are respectively and slidably connected with the sliding grooves (2311) on both sides, the adjacent sealing strips (25) are slidably connected, and the inner side of the sealing strip (25) is provided with a transmission inclined surface (251).

7. The fully automatic packing machine with the packing pre-tightening function according to claim 6, characterized in that: The sliding grooves (2311) are arranged in an inclined manner, and the outer layer of the sliding grooves (2311) is higher than the inner layer.

8. The fully automatic packing machine with the packing pre-tightening function according to claim 7, characterized in that: The heat-shrinking device (2) further comprises a hot air machine (24) which is in pipeline communication with the heat-shrinking cavity (212).

9. The fully automatic packing machine with the packing pre-tightening function according to claim 8, characterized in that: The shell (21) is provided with hot air outlets (213), one hot air outlet (213) is arranged on each of the upper and lower wall surfaces of the heat-shrinking cavity (212), and the hot air machine (24) is in communication with the heat-shrinking cavity (212) through the hot air outlets (213).

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