Pre-packaged food preservation film sealing and packaging machine

Abstract

The application discloses a pre-prepared dish fresh-keeping film sealing and packaging machine and relates to the technical field of food packaging. The pre-prepared dish fresh-keeping film sealing and packaging machine comprises a box body, a supporting mechanism is arranged on the box body, a packaging box is movably arranged on the supporting mechanism, the packaging box is sealed by a film sealing assembly, film pasting assemblies are arranged on the two sides of the box body close to the film sealing assembly, the film pasting assemblies are used for assisting sealing after the film sealing action of the supporting mechanism, and the fresh-keeping film sealing effect of the pre-prepared dish is ensured. The pre-prepared dish fresh-keeping film sealing and packaging machine is used for sealing, negative pressure adsorption, film pasting and local heat sealing of the pre-prepared dish packaging box, realizes full sealing of the pre-prepared dish fresh-keeping film packaging, effectively improves the fresh-keeping film sealing effect of the packaging box, prevents a series of problems such as loose packaging and gaps, and ensures the edible safety of the pre-prepared dish food.

Description

Technical Field

[0001] This invention relates to the field of food packaging technology, and in particular to a pre-prepared vegetable preservation and sealing packaging machine. Background Technology

[0002] Pre-prepared meals generally refer to semi-finished or finished products made from various agricultural, livestock, poultry, and aquatic products as raw materials, along with seasonings and other auxiliary ingredients, through pre-selection and preparation processes. Pre-prepared meals typically require storage or transportation under cold chain conditions, and are intended for consumers or food service providers to simply heat or cook before consumption. With the increasing popularity and promotion of pre-prepared meals, their packaging has become a major concern, especially in the temporary pre-packaging processes in supermarkets and restaurants. The preservation and packaging of pre-prepared meals still has some shortcomings that require further improvement.

[0003] In existing technologies, while commercially available pre-prepared food sealing packaging equipment achieves a certain sealing effect during the actual packaging process, it has a poor sealing effect on the cling film at the bottom of the box, and is prone to defects such as gaps. This not only reduces the packaging effect of pre-prepared food, but also affects food safety.

[0004] Therefore, we propose a pre-made food preservation and sealing packaging machine to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems by proposing a pre-prepared vegetable preservation and sealing packaging machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pre-prepared food preservation and sealing packaging machine includes a housing with a support mechanism. A packaging box is movably placed on the support mechanism. The packaging box is sealed with a sealing assembly for preservation. Film-applying components are located on both sides of the housing near the sealing assembly. These film-applying components, in conjunction with the support mechanism, provide auxiliary sealing after the sealing action, ensuring the preservation and sealing effect of the pre-prepared food.

[0008] The box is equipped with a feeding roller, which is connected to the sealing assembly via a guide roller to realize the film feeding operation of the pre-prepared vegetable preservation packaging.

[0009] The sealing assembly includes a motor, pressure plates, and a switching mechanism. Two sets of pressure plates are horizontally arranged; one set performs film pulling and covering actions, while the other set performs film cutting actions.

[0010] The pressure plate is equipped with a cutter, which performs film cutting via a switching mechanism when the pressure plate rotates to a horizontal position.

[0011] The film-applying assembly includes a top plate and a transmission mechanism. After the pressure plate moves to a horizontal position, the switching mechanism enables the meshing action between the motor output shaft and the transmission mechanism, thereby driving the top plate to apply and seal the cling film to the packaging box through the transmission mechanism.

[0012] Optionally, the switching mechanism includes a bushing, a shaft, and a movable shaft. One end of the movable shaft rotates synchronously with the output shaft of the motor via the shaft center, and the other end of the movable shaft is slidably connected to the bushing via an electromagnetic block.

[0013] The shaft adopts a splined shaft structure, and one end of the shaft is slidably connected to the movable shaft.

[0014] The other end of the movable shaft is provided with a limiting block, and the shaft sleeve is provided with a keyway. The limiting block and the keyway are slidably connected.

[0015] The electromagnetic block is energized every 180° rotation of the movable shaft, and moves towards one end of the transmission mechanism through magnetic attraction. At this time, the movable shaft is disengaged through the sliding of the first spring and the bushing, thereby enabling the output shaft of the motor and the film-applying assembly to engage and transmit power.

[0016] Optionally, the pressure plate is provided with a knife retraction groove, the cutter is slidably connected to the knife retraction groove via a second spring, the movable shaft is fixedly connected to a wedge block via a Y-shaped rod, the wedge block is slidably connected to the base of the cutter, and the wedge block pushes the cutter to achieve film cutting when the pressure plate rotates to a horizontal position.

[0017] Optionally, the transmission mechanism includes a rotating component and a transmission component. The rotating component includes a worm, a worm wheel, and a double-ended screw. The worm wheel and the double-ended screw are fixedly connected, and one end of the worm is meshed with the worm wheel.

[0018] The transmission component includes a driving bevel gear and a driven bevel gear that mesh with each other. The driving bevel gear is fixedly connected to the movable shaft, and the driven bevel gear is coaxially fixedly connected to the other end of the worm gear.

[0019] When the motor drives the pressure plate to rotate 180°, the electromagnetic block becomes conductive and moves towards one end of the driven bevel gear through magnetic attraction. At this time, one end of the movable shaft maintains transmission with the motor's output shaft through the shaft center, while the other end of the movable shaft disengages from the bushing, thus realizing the switching of the motor's driving force.

[0020] Optionally, the two ends of the bidirectional screw are symmetrically provided with frames, and a return spring is provided between adjacent frames. The top plate is slidably connected to the frame through a rotating shaft. The box body is provided with a folded groove, and the top plate is connected to the packaging box through the folded groove.

[0021] Optionally, the support mechanism includes an air pump, a support column, and a loading platform. The loading platform is movably connected to the support column via a third spring. The loading platform performs a film-adhesion action on the packaging box through the air pump and the air suction hole.

[0022] Optionally, the loading platform is provided with multiple sets of heating blocks at one end near the packaging box, and with piezoelectric ceramics at the other end away from the packaging box. The piezoelectric ceramics are energized and heated by the pressure of a third spring during the pressing process of the loading platform being squeezed by the pressure plate. During the resetting process of the pressure plate, the plastic wrap at the bottom of the packaging box is locally heat-sealed.

[0023] The present invention has the following advantages:

[0024] By performing operations such as sealing, negative pressure adsorption, film application, and partial heat sealing on the pre-prepared food packaging boxes, a fully sealed pre-prepared food preservation film packaging is achieved, effectively improving the sealing and preservation effect of the packaging boxes, eliminating a series of problems such as gaps caused by loose packaging, and ensuring the food safety of pre-prepared food.

[0025] This invention employs a switching drive structure. During motor operation, the output shaft drives the cling film on the pressure plate to rotate in a circular motion, thereby sealing the packaging box. When the pressure plate rotates 180°, the electromagnetic block becomes conductive, and through magnetic attraction, it drives one end of the movable shaft transmission mechanism to move. At this time, one end of the movable shaft maintains transmission through the shaft center and the output shaft of the motor, while the other end of the movable shaft disengages from the bushing and connects to the transmission mechanism, causing the top plate to slide in the folded groove, thereby applying the cling film to the packaging box from the outside to the inside. This achieves cyclic switching of the motor drive force. During this process, the cutter is intermittently ejected by triggering, and the cling film is cut, achieving rapid sealing and application of the packaging box.

[0026] The key feature of this invention is that the sealing of the packaging box is achieved through the circular motion of the sealing assembly. Then, the driving force of the sealing assembly is switched to the film-applying mechanism to achieve the film-applying of the packaging box. During the film-applying process, the packaging box is subjected to film-applying and negative pressure adsorption in conjunction with the air hole on the loading platform. The extrusion of the film-applying assembly triggers the piezoelectric ceramic, which in turn heats the heating block on the loading platform. During the resetting process of the film-applying assembly, the plastic wrap at the bottom of the packaging box is instantly and locally heat-sealed, making the plastic wrap on the packaging box more adherent and tight. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the rear view structure;

[0029] Figure 3This is a schematic diagram of the film-applying assembly in this invention;

[0030] Figure 4 This is a schematic diagram of the switching mechanism support mechanism in this invention;

[0031] Figure 5 This is a schematic diagram of the structure of the present invention;

[0032] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle.

[0033] In the diagram: 1. Box body; 11. Folded groove; 2. Support mechanism; 21. Air pump; 22. Support column; 23. Loading platform; 231. Third spring; 232. Air intake hole; 24. Heating block; 25. Piezoelectric ceramic; 3. Packaging box; 4. Sealing assembly; 41. Motor; 42. Pressure plate; 421. Knife relief groove; 43. Switching mechanism; 431. Bushing; 432. Shaft; 433. Movable shaft; 434. Electromagnetic block; 435. Limit block; 4 36. Keyway; 437. First spring; 438. Y-shaped rod; 439. Wedge block; 44. Cutter; 441. Second spring; 5. Film application assembly; 6. Feed roller; 7. Guide roller; 8. Top plate; 81. Rotating shaft; 9. Transmission mechanism; 91. Rotating component; 911. Worm gear; 912. Worm wheel; 913. Bidirectional screw; 914. Frame; 915. Return spring; 92. Transmission component; 921. Driving bevel gear; 922. Driven bevel gear. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figure 1-5 A pre-prepared vegetable preservation and sealing packaging machine includes a box body 1, a support mechanism 2, a packaging box 3 movably placed on the support mechanism 2, and the packaging box 3 is sealed for preservation by a sealing assembly 4. It should be noted that the box body 1 is equipped with a feeding roller 6, which is connected to the sealing assembly 4 through a guide roller 7 to realize the film feeding work of pre-prepared vegetable preservation packaging.

[0036] Specifically, refer to Figure 1 and Figure 5The sealing assembly 4 includes a motor 41, pressure plates 42, and a switching mechanism 43. Two sets of pressure plates 42 are horizontally arranged. The motor 41 is controlled by a PLC via a touchscreen. One set of pressure plates 42 performs film pulling and covering actions, while the other set performs film cutting actions. Specifically, the film cutting process involves a cutter 44 on the pressure plate 42. The cutter 44 cuts the film when the pressure plate 42 rotates to a horizontal position via the switching mechanism 43. The switching mechanism 43 includes a bushing 431, a shaft 432, and a movable... Shaft 433 and pressure plate 42 are provided with a knife retraction groove 421. The cutter 44 is slidably connected to the knife retraction groove 421 via a second spring 441. The movable shaft 433 is fixedly connected to a wedge block 439 via a Y-shaped rod 438 (the Y-shaped rod 438 is rotatably connected to the movable shaft 433 via a bearing). The wedge block 439 and the base of the cutter 44 are slidably connected. When the pressure plate 42 rotates to a horizontal position, the movable shaft 433 moves during the switching process. The cutter 44 is pushed by the wedge block 439 to achieve the film cutting operation.

[0037] More specifically, refer to Figure 6 The shaft 432 adopts a spline shaft structure. One end of the movable shaft 433 rotates synchronously with the output shaft of the motor 41 through the shaft 432. The other end of the movable shaft 433 is provided with a limit block 435. The bushing 431 is provided with a keyway 436. The limit block 435 and the keyway 436 are slidably connected. The other end of the movable shaft 433 is slidably connected with the bushing 431 through an electromagnetic block 434. Every time the movable shaft 433 rotates 180°, the electromagnetic block 434 enters the energized state and moves towards one end of the transmission mechanism 9 through magnetic attraction. At this time, the movable shaft 433 is disengaged through the sliding of the first spring 437 and the bushing 431, thereby enabling the output shaft of the motor 41 and the film-applying assembly 5 to engage and transmit power.

[0038] Reference Figures 1 to 3 The box body 1 is provided with film-applying components 5 on both sides near the sealing component 4. The film-applying components 5 include a top plate 8 and a transmission mechanism 9. After the pressure plate 42 moves to the horizontal position, the switching mechanism 43 realizes the meshing action between the output shaft of the motor 41 and the transmission mechanism 9. The transmission mechanism 9 drives the top plate 8 to apply and seal the plastic wrap of the packaging box 3.

[0039] Furthermore, the transmission mechanism 9 includes a rotating component 91 and a transmission component 92. The rotating component 91 includes a worm 911, a worm wheel 912, and a double-acting screw 913. The worm wheel 912 and the double-acting screw 913 are fixedly connected. One end of the worm 911 is meshed with the worm wheel 912. The transmission component 92 includes a driving bevel gear 921 and a driven bevel gear 922 that mesh with each other. The driving bevel gear 921 is fixedly connected to the movable shaft 433, and the driven bevel gear 922 is coaxially fixedly connected to the other end of the worm 911. When the motor 41 drives the pressure plate 42 to rotate 180°, the electromagnetic block 434 becomes conductive (at this time, the motor 41 stops rotating under the control of the PLC). It moves towards one end of the driven bevel gear 922 through magnetic attraction. At this time, one end of the movable shaft 433 maintains transmission with the output shaft of the motor 41 through the shaft center 432, and the other end of the movable shaft 433 disengages from the bushing 431, realizing the switching of the driving force of the motor 41.

[0040] Reference Figure 2 and Figure 3 The film-applying component 5, in conjunction with the support mechanism 2, provides auxiliary sealing after the film-applying action, ensuring the preservation and sealing effect of the pre-prepared food. It should be noted that the bidirectional screw 913 is rotatably connected to the outside of the box 1 via the bracket. The two ends of the bidirectional screw 913 are symmetrically provided with frames 914. The frames 914 slide with the bidirectional screw 913 via sliders. The frames 914 are provided with grooves. The top plate 8 is slidably connected to the grooves of the frames 914 via the rotating shaft 81. The box 1 is provided with a folded groove 11. The top plate 8 is connected to the packaging box 3 via the folded groove 11. A return spring 915 is provided between adjacent frames 914 to facilitate the reset work of the top plate 8 after the film-applying action, thus achieving the film-applying effect after the packaging box 3 is sealed.

[0041] Furthermore, referring to Figure 1 and Figure 4 The support mechanism 2 includes an air pump 21, a support column 22, and a loading platform 23. The loading platform 23 is movably connected to the support column 22 via a third spring 231. The loading platform 23 performs a film-applying and negative pressure adsorption action on the packaging box 3 through the air pump 21 and the suction port 232. It is worth mentioning that multiple sets of heating blocks 24 are provided at the end of the loading platform 23 closest to the packaging box 3, and piezoelectric ceramics 25 are provided at the end of the loading platform 23 furthest from the packaging box 3. When the loading platform 23 is squeezed by the pressure plate 42, the piezoelectric ceramics 25 are triggered by the pressure of the third spring 231 to energize and heat the heating blocks 24. During the reset process of the pressure plate 42, the plastic wrap at the bottom of the packaging box 3 is partially heat-sealed to ensure the sealing effect of the plastic wrap at the bottom of the packaging box 3.

[0042] The operating principle of the present invention is now described as follows:

[0043] When the device is in use, the staff places the pre-made food boxes to be packaged on the loading platform 23. The motor 41 is started by controlling the PLC. The output shaft of the motor 41 is connected to the plastic wrap through the pressure plate 42 and moves in a circular motion to seal the packaging box 3. When the pressure plate 42 rotates 180°, the electromagnetic block 434 becomes conductive and drives the movable shaft 433 to move towards one end of the driven bevel gear 922 through magnetic attraction. At this time, one end of the movable shaft 433 is connected to the output shaft of the motor 41 through the shaft 432 and the other end of the movable shaft 433 is disengaged from the bushing 431, realizing the switching of the driving force of the motor 41. During this process, the wedge block 439 fixedly connected to the movable shaft 433 pushes the cutter 44 to pop out and cut the plastic wrap. During the sliding process, the movable shaft 433 drives the active bevel gear 921 and the driven bevel gear 922 to mesh and transmit power. The driven bevel gear 922 drives the bidirectional screw 913 to rotate through the worm 911 and worm wheel 912. The bidirectional screw 913 drives the top plate 8 to slide in the folded groove 11 through the frame 914, thereby applying the plastic wrap to the packaging box 3 from the outside to the inside. During this process, the loading platform 23 performs the film-applying and negative pressure adsorption action on the packaging box 3 through the air pump 21 and the air suction hole 232. When the top plate 8 moves to the bottom of the packaging box 3, the loading platform 23 and the support column 22 slide due to the pressure. At this time, the third spring 231 activates the heating block 24 to heat it through pressure triggering. During the reset process of the pressure plate 42, the plastic wrap at the bottom of the packaging box 3 is instantly and locally heat-sealed, making the plastic wrap on the packaging box 3 more tightly and closely sealed.

[0044] The above description is only a preferred embodiment of the present invention. It is impossible to exhaustively describe all embodiments here. However, the protection scope of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A pre-prepared vegetable preservation and sealing packaging machine, comprising a housing (1), wherein the housing (1) is provided with a support mechanism (2), and a packaging box (3) is movably placed on the support mechanism (2). The packaging box (3) is sealed for preservation by a sealing assembly (4). Film-applying assemblies (5) are provided on both sides of the housing (1) near the sealing assembly (4). The film-applying assemblies (5), in conjunction with the support mechanism (2), provide auxiliary sealing after the sealing action, ensuring the preservation and sealing effect of the pre-prepared vegetables. The machine is characterized in that... The box body (1) is equipped with a feeding roller (6), which is connected to the sealing assembly (4) via a guide roller (7) to realize the film feeding operation of the pre-prepared vegetable preservation packaging. The sealing assembly (4) includes a motor (41), a pressure plate (42) and a switching mechanism (43). The two sets of pressure plates (42) are set horizontally. One set of pressure plates (42) performs film pulling and covering actions, and the other set of pressure plates (42) performs film cutting actions. The pressure plate (42) is equipped with a cutter. (44) The cutter (44) performs film cutting work through the switching mechanism (43) when the pressure plate (42) rotates to the horizontal position. The film-applying assembly (5) includes a top plate (8) and a transmission mechanism (9). After the pressure plate (42) moves to the horizontal position, the switching mechanism (43) enables the meshing action between the output shaft of the motor (41) and the transmission mechanism (9). Then, the transmission mechanism (9) drives the top plate (8) to perform film-applying and sealing work on the plastic wrap of the packaging box (3). The switching mechanism (43) includes a bushing (431), a shaft (432), and a movable shaft (433). One end of the movable shaft (433) rotates synchronously with the output shaft of the motor (41) via the shaft (432). The other end of the movable shaft (433) is slidably connected to the bushing (431) via an electromagnetic block (434). The shaft (432) adopts a spline shaft structure. The shaft (432) is slidably connected to one end of the movable shaft (433), and the other end of the movable shaft (433) rotates synchronously with the output shaft of the motor (41). The end is provided with a limiting block (435), and the bushing (431) is provided with a keyway (436). The limiting block (435) and the keyway (436) are slidably connected. When the movable shaft (433) rotates 180°, the electromagnetic block (434) enters the energized state and moves towards one end of the transmission mechanism (9) by magnetic attraction. At this time, the movable shaft (433) is disengaged by sliding between the first spring (437) and the bushing (431), thereby enabling the output shaft of the motor (41) and the film-applying assembly (5) to mesh and drive. The transmission mechanism (9) includes a rotating component (91) and a transmission component (92). The rotating component (91) includes a worm (911), a worm wheel (912), and a double-ended screw (913). The worm wheel (912) and the double-ended screw (913) are fixedly connected. One end of the worm (911) is meshed with the worm wheel (912). The transmission component (92) includes a driving bevel gear (921) and a driven bevel gear (922) that mesh with each other. The driving bevel gear (921) and the movable shaft (433) The driven bevel gear (922) and the worm gear (911) are fixedly connected on the same axis. When the motor (41) drives the pressure plate (42) to rotate 180°, the electromagnetic block (434) becomes conductive and moves towards one end of the driven bevel gear (922) through magnetic attraction. At this time, one end of the movable shaft (433) maintains transmission through the shaft (432) and the output shaft of the motor (41), and the other end of the movable shaft (433) disengages from the bushing (431) to realize the switching of the driving force of the motor (41). The support mechanism (2) includes an air pump (21), a support column (22), and a loading platform (23). The loading platform (23) is movably connected to the support column (22) via a third spring (231). The loading platform (23) performs a film-negative pressure adsorption action on the packaging box (3) via the air pump (21) and the air intake hole (232). The loading platform (23) is provided with multiple sets of heating blocks (24) at one end near the packaging box (3), and piezoelectric ceramics (25) are provided at the other end away from the packaging box (3). The piezoelectric ceramics (25) are used to heat the heating blocks (24) by the pressure of the third spring (231) during the pressing process of the loading platform (23) being squeezed by the pressure plate (42). During the reset process of the pressure plate (42), the plastic wrap at the bottom of the packaging box (3) is partially heat-sealed.

2. The pre-prepared vegetable preservation and sealing packaging machine according to claim 1, characterized in that, The pressure plate (42) is provided with a knife relief groove (421). The cutter (44) is slidably connected to the knife relief groove (421) via a second spring (441). The movable shaft (433) is fixedly connected to a wedge block (439) via a Y-shaped rod (438). The wedge block (439) is slidably connected to the base of the cutter (44). When the pressure plate (42) rotates to a horizontal position, the wedge block (439) pushes the cutter (44) to achieve the film cutting operation.

3. The pre-prepared vegetable preservation and sealing packaging machine according to claim 1, characterized in that, The two ends of the bidirectional screw (913) are symmetrically provided with frames (914), and a return spring (915) is provided between adjacent frames (914). The top plate (8) is slidably connected to the frame (914) through a rotating shaft (81). The box body (1) is provided with a folded groove (11), and the top plate (8) is connected to the packaging box (3) through the folded groove (11).

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