Limit thermal sealing device and control method for layer-by-layer conveying bags of container and lid

Abstract

The present invention discloses a limiting heat-sealing device and a control method for layer-by-layer conveying and bagging of a container and a lid. The device includes a first heat-sealing unit, a receiving and conveying platform, and a roll film. A roll film is arranged above and behind the upper sealing die of the first heat-sealing unit, and another roll film is arranged below and in front of the lower sealing die of the first heat-sealing unit. After the films drawn out from the upper and lower roll films are aligned and heat-sealed by the first heat-sealing unit, the product presses against the heat-sealing part and enters the feeding station of the first heat-sealing unit. A receiving and conveying platform is arranged at the discharging station of the first heat-sealing unit. Upper and lower lifting heat-insulating limiting gate valves are arranged between the first heat-sealing unit and the receiving and discharging conveying platform. The present invention also provides a control method for the limiting heat-sealing device for layer-by-layer conveying and bagging of a container and a lid. The device and the method enable the products arranged in a single-column stack and multiple columns to be closely matched, and the overall products are compact, neat, beautiful and aesthetically pleasing after heat-sealing.

Description

Technical Field

[0001] The invention relates to the technical field of packaging equipment, and in particular to a position-limiting heat-sealing device and a heat-sealing method for layer-by-layer conveying and bagging of containers and covers. Background Art

[0002] The existing bagging and conveying technology for thermoforming and injection molding of container lids, including products such as containers and lids that are arranged in multiple rows in a layer for bagging and packaging, especially lids and products with a diameter greater than the height, the products at both ends will inevitably be scattered and unable to be conveyed during the horizontal conveying process of the entire product. This includes the layer-by-layer conveying of the bagging and pushing the upper and lower layers of film through the upper and lower heat-sealing molds and the heat-sealing opening of the mold closing, because there is no limiting roller that rises and falls synchronously with the heat-sealing mold. When the upper and lower heat-sealing molds are closed, the outer corners and inner corners of the heat-sealing molds will inevitably burn the film first. In order to avoid scalding the film, the sealing position of the heat-sealing mold must be far away from the product, which will cause redundant space in the bag after the bagging and heat-sealing, and then cause the lid and the products at both ends of the whole product whose diameter is greater than the height to tilt and scatter, affecting the transportation and packaging. Because the heat-sealing mold is hot-scalded, when the heat-sealing mouth moves up and down to close the mold, its inner and outer corners must be closed and sealed synchronously to press the upper and lower films first. In the case of traditional technology without anti-scalding components, in order to reduce the scalding of the upper and lower packaging films, the products must be far away from the heat seal, which leads to technical defects such as scattered products at both ends, untidy and unsightly packaging. In view of the above problems existing in the above-mentioned traditional technologies at home and abroad, bagging and packaging can only choose special products with a high height for bagging and packaging, and cannot realize the layer-by-layer transportation and bagging of containers and lids of any specifications and shapes. The inventor innovatively solves the problem of the upper and lower packaging films being scalded by the lifting and closing of the upper and lower heat sealing molds, by using fences on both sides of the receiving and unloading tray to limit the position of the entire layer of products during the conveying process, so as to prevent the film roller from being scalded, and by setting lifting and closing anti-scalding gates and anti-scalding limiting gates on both sides on the inner side of the heat sealing mold. This solves the problem of the upper and lower packaging films being scalded by the upper and lower heat sealing molds that will definitely touch the upper and lower packaging films first during the lifting and closing process, thereby making the packaged products as close to the sealing line as possible, making the entire layer of products neat and beautiful, and the outer sides of the products are protected from tilting and scattering on all four sides. This solves the technical defects on this issue at home and abroad. Summary of the invention

[0003] The present invention provides a limited heat sealing device for layer-by-layer conveying and bagging of containers and lids. Aiming at the technical defects existing in the background technology, the present technology adopts the following technical solutions to solve the above-mentioned technical defects:

[0004] On the one hand, the present invention provides a limited heat sealing device for layer-by-layer conveying and bagging of containers and lids, characterized by a first heat sealing unit, a roll film respectively arranged at the upper rear and lower front of the first heat sealing unit, and a material receiving and conveying platform mechanism arranged at the material discharging station of the first heat sealing unit;

[0005] After the upper and lower films corresponding to the upper and lower winding films are aligned and heat-sealed by the first heat-sealing unit, the whole-layer product presses against the film heat-sealing part, and the upper and lower films are pulled into the feeding station of the first heat-sealing unit;

[0006] An upper and lower lifting anti-scald limit gate is arranged between the first heat-sealing unit and the material receiving transfer platform.

[0007] In this solution, the upper film and the lower film led out from the upper and lower winding films are combined and first enter the first heat-sealing unit for heat-sealing in the feeding station, forming the front heat-sealing part of the packaged product. As the product to be packaged presses against the front heat-sealing parts of the upper and lower films and moves forward, it passes through the space at the mold-closing position from the feeding station of the first heat-sealing unit to the discharging station and enters the material receiving transfer platform. The upper and lower lifting anti-scald limit gates move in alignment, so as to tighten and limit the upper film and the lower film between the front and rear ends of the whole-layer product entering the material receiving transfer disk, ensuring the flatness of the upper film and the lower film in the front and rear directions, eliminating the redundant space in the film packaging caused by unevenness. At the same time, it also has the function of preventing scalding of the upper and lower sealing dies of the first heat-sealing unit.

[0008] As an improvement of the above solution, the device further includes a second heat-sealing unit and a third heat-sealing unit. The material receiving transfer platform mechanism is arranged between the second heat-sealing unit and the third heat-sealing unit; an adjusting device for adjusting the clutch distance between the two is arranged between the second heat-sealing unit and the third heat-sealing unit.

[0009] The material receiving transfer platform mechanism includes lower two-side anti-scald clutch limit devices, a material receiving transfer platform arranged above the lower two-side anti-scald clutch limit devices, and a lifting and translation mechanism that can independently lift the lower two-side anti-scald clutch limit devices and the material receiving transfer platform respectively; the lifting and translation mechanism can lift and slide between the feeding station, the double-side heat-sealing station and the packing station of the material receiving transfer platform mechanism, and the material receiving transfer platform can be adjusted according to the packing length; the lower two-side anti-scald clutch limit devices include lower double-side anti-scald limit gates, a first positive and reverse lead screw for adjusting the corresponding distance of the lower double-side anti-scald limit gates, a connecting transmission part adapted to the gear fixed on the first positive and reverse lead screw, and a driving source for driving the connecting transmission part.

[0010] In this solution, the lower two-side anti-scald clutch limit devices rise to lift the films on both sides of the product on the material receiving transfer platform, preventing the unevenness of the exposed films on both sides from forming redundant space during the process of the product to be packaged pressing against the front heat-sealing parts of the upper and lower films and moving forward; after lifting, the lower two-side anti-scald clutch limit devices clamp the product, further reducing the gap between single-column stacked products, thereby reducing the redundant space during the film packaging process; the second heat-sealing unit and the third heat-sealing unit approach from the initial positions far away to the double-side heat-sealing station, and the second heat-sealing unit and the third heat-sealing unit respectively heat-seal both sides of the product to complete the four-side heat-sealing of the product.

[0011] As an improvement to the above solution, the device further includes a translation sliding support frame, a lifting platform structure slidably connected to the lower part of the translation sliding support frame, and an upper two-side anti-scald clutch limiting device connected to the lower part of the lifting platform structure; the lifting platform structure slides back and forth along the translation sliding support frame between the material receiving station, the two-side heat sealing stations and the packing station;

[0012] The upper two-side anti-scald clutch limiting device includes an upper double-side anti-scald limiting gate, a third positive and reverse lead screw for adjusting the corresponding distance between the upper double-side anti-scald limiting gates, a connecting transmission member adapted to the gear fixed on the third positive and reverse lead screw, and a driving source for driving the connecting transmission member. The adjustment of the distance between the upper double-side anti-scald limiting gates is for limiting and clamping the products or picking up the products for packing; a pressing and unloading plate is arranged below the upper two-side anti-scald clutch limiting device. The lifting platform structure can respectively lift and lower the upper two-side anti-scald clutch limiting device and the pressing and unloading plate independently. After the products are packed, the pressing and unloading plate independently descends according to the stroke command of the controller to flatten the products.

[0013] In this solution, at the double-side heat sealing station, the upper two-side anti-scald clutch limiting device descends to clamp the multi-column stacked products on the two-side clamping and unloading tray at both sides. At the rear end, heat sealing causes the columns to be tightly arched between each other. The pressing and unloading plate can independently descend again to flatten the arch, ensuring that there is no redundant space in the upper layer of the film due to the arch, and the two-side clutch clamping also avoids redundant space due to the gaps between the single-column stacked products, ensuring that the upper layer of the product is close to the sealing line of the lower packaging film to ensure the compactness and aesthetics of the packaging.

[0014] On the other hand, the present invention provides a control method for feeding trays and bagging and heat sealing products of a layer-by-layer conveying and bagging limiting device for containers and lids. The method includes

[0015] The front end of the whole layer of products carried by the layer-by-layer receiving and unloading tray tightly abuts against the film heat sealing part, guiding the single films of the upper and lower two roll films. Driven by the translation motor, the layer-by-layer receiving and unloading tray together with the whole layer of products enters the material receiving transfer platform table through the first heat sealing unit;

[0016] The upper lifting anti-scald limiting gate of the first heat sealing unit first descends to the fence of the layer-by-layer receiving and unloading tray to block the rear end of the whole layer of products. The lower double-side anti-scald limiting gate first rises for limiting according to the pre-programmed stroke, the upper double-side anti-scald limiting gate first descends for limiting, and the translation motor drives the layer-by-layer receiving and unloading tray and the pushing manipulator above the tray to start retracting and resetting to standby at the same time;

[0017] The lifting and translation mechanism drives the material receiving transfer platform to descend to the heat sealing center line position of the whole layer of products. The upper lifting anti-scald limiting gate of the first heat sealing unit secondarily descends to the middle sealing line. At the same time, the lower lifting anti-scald limiting gate of the first heat sealing unit also rises to the middle sealing line position;

[0018] The upper and lower sealing dies of the first heat-sealing unit are closed to complete the heat-sealing of the rear end of the whole-layer product, and the single-layer upper and lower films corresponding to the upper and lower winding films are separated from the upper and lower films covering the product; at the same time, after the material receiving and conveying platform and the upper two-side anti-scalding clutch limiting device are synchronously started and translated to the double-side heat-sealing station; the upper two-side anti-scalding clutch limiting device descends, and the upper double-side anti-scalding limiting brake is closed and clamped on the product under the rotation drive of the third positive and reverse lead screw;

[0019] The side heat-sealing cylinders of the second and third heat-sealing units correspondingly drive the upper and lower sealing dies to be closed to complete the heat-sealing of both sides of the whole-layer product and reset. The material receiving and conveying platform rises to the horizontal plane of the material receiving station, and the lower double-side anti-scalding limiting brake also descends and resets at the same time. The material receiving and conveying platform and the upper double-side anti-scalding limiting brake each translate and slide to the packing station according to their own strokes.

[0020] On the other hand, the present invention provides a method for controlling the feeding, bagging and product packing of a limiting heat-sealing device for layer-by-layer conveying and bagging of a container and a lid. The method includes

[0021] After receiving the signal, at the material receiving station, the lifting, translating and pushing mechanism drives the manipulator to descend to push the whole-layer product to a specified position in the layer-by-layer material receiving and discharging tray, and the material receiving and discharging tray translation motor at the bottom of the sliding seat is started;

[0022] The layer-by-layer material receiving and discharging tray carries the whole-layer product and slides along the track to stop at the upper and lower lifting anti-scalding limiting gates of the first heat-sealing unit. At the same time, the lifting, translating and pushing mechanism translates to the discharging station, drives the manipulator to descend and pushes the rear end of the whole-layer product on the layer-by-layer material receiving and discharging tray forward, so that the front end of the whole-layer product presses against the film heat-sealing part to pull the upper and lower films and push the whole-layer product through the upper and lower mating spaces between the upper and lower lifting anti-scalding limiting gates. The upper and lower lifting anti-scalding limiting gates are mated up and down, and correspondingly press and limit the upper and lower films at the rear end of the whole-layer product to complete the anti-scalding limit;

[0023] The first heat-sealing unit completes the front and rear end heat-sealing of the whole-layer product, and the second and third heat-sealing units complete the double-side heat-sealing of the whole-layer product;

[0024] The material receiving and conveying platform carrying the heat-sealed whole-layer product rises and slides to the packing station. At the same time, the lower double-side anti-scalding limiting brake descends to the standby position, and the upper double-side anti-scalding limiting brake synchronously translates to the packing station;

[0025] At the packing station, the upper double-side anti-scalding limiting brake picks up the heat-sealed whole-layer product for packing; the packing unloading and pressing motor arranged on the lifting platform structure drives the pressing and unloading plate connected to the rack to descend according to the pre-programmed stroke to press the whole-layer product to complete the packing; the material receiving and conveying platform and the upper double-side anti-scalding limiting brake are all reset to the material receiving standby state to complete the whole heat-sealing operation.

[0026] Control method for the limit heat-sealing device of the layer-by-layer transfer and bagging of the container and lid of the present invention, enabling tight fit between products arranged in single-column stacks and multi-column layouts. Through the limit of the packaging film by the up-and-down heat-insulating limit gate, the overall packaged products after heat-sealing are compact, neat, beautiful and aesthetically pleasing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 One of the schematic structural diagrams of the first heat-sealing unit of the limit heat-sealing device for the layer-by-layer transfer and bagging of the container and lid provided in Embodiment 1 of the present invention;

[0028] Figure 2 Another schematic structural diagram of the first heat-sealing unit of the limit heat-sealing device for the layer-by-layer transfer and bagging of the container and lid provided in Embodiment 1 of the present invention;

[0029] Figure 3 One of the schematic structural diagrams of the limit heat-sealing device for the layer-by-layer transfer and bagging of the container and lid provided in Embodiment 2 of the present invention;

[0030] Figure 4 Another schematic structural diagram of the limit heat-sealing device for the layer-by-layer transfer and bagging of the container and lid provided in Embodiment 2 of the present invention;

[0031] Figure 5 Schematic structural diagram of the connection relationship between the first heat-sealing unit and the material receiving and transfer platform provided in various embodiments of the present invention;

[0032] Figure 6 One of the schematic structural diagrams of the material receiving and transfer platform in Embodiment 3 of the present invention;

[0033] Figure 7 Another schematic structural diagram of the material receiving and transfer platform in Embodiment 3 of the present invention;

[0034] Figure 8 Another schematic structural diagram of the material receiving and transfer platform in Embodiment 3 of the present invention;

[0035] Figure 9 One of the schematic structural diagrams of the layer-by-layer transfer and packing mechanism in Embodiment 4 of the present invention;

[0036] Figure 10 Another schematic structural diagram of the layer-by-layer transfer and packing mechanism in Embodiment 4 of the present invention;

[0037] Figure 11 Schematic exploded view of the unloading and loading mechanism in Embodiment 5 of the present invention;

[0038] Figure 12 Schematic structural diagram of the layer-by-layer unloading and loading unit in Embodiment 5 of the present invention;

[0039] Figure 13It is a schematic diagram of the overall structure of a limiting heat-sealing device for layer-by-layer conveying and sleeving of a container and a lid provided in Embodiment 5 of the present invention. Embodiment

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0041] A limiting heat-sealing device for layer-by-layer conveying and sleeving of a container and a lid provided by the present invention includes a heat-sealing and packaging unit, film rolls respectively arranged at two positions above and below the heat-sealing and packaging unit, and a layer-by-layer loading and unloading unit for conveying products to the heat-sealing and packaging unit. The products are nested containers and lids, nested containers, nested lids or other nestable products, and are arranged in a single column and stacked in multiple columns.

[0042] The heat-sealing and packaging unit includes a first heat-sealing unit 100, second and third heat-sealing units (second and third heat-sealing units 200) arranged on both sides of the first heat-sealing unit, and a material receiving and conveying platform mechanism 300 arranged between the second and third heat-sealing units; the upper and lower films led out from the film rolls 10, 10' at two positions behind and above, and in front and below the first heat-sealing unit respectively pass through the film rollers 11, 11' and are combined and heat-sealed at the mold closing position in the middle of the first heat-sealing unit to form the front heat-sealing of the product to be packaged. The product to be packaged presses against the front heat-sealing parts of the upper and lower films and moves forward, passes through the heat-sealable mold closing position from the feeding station of the first heat-sealing unit to its discharging station, and enters the material receiving and conveying platform between the second and third heat-sealing units; during the forward movement, the upper film led out from the upper film roll covers the product, and the lower film led out from the lower film roll is located below the product. After the product completely enters the material receiving and conveying platform, the first heat-sealing unit behind it heat-seals the upper and lower films again to complete the rear heat-sealing of the product. Then, when the material receiving and conveying platform reaches the designated station, the second and third heat-sealing units perform bilateral heat-sealing on the product, thus completing the four-sided heat-sealing packaging of the product. The rear heat-sealing part of the product is disconnected. On the one hand, it completes the rear heat-sealing of the product and disconnects from the packaging film of the next group of products to be packaged. On the other hand, it simultaneously forms the front heat-sealing of the next group of products to be packaged.

[0043] A limiting heat-sealing device for layer-by-layer conveying and sleeving of a container and a lid provided in Embodiment 1 of the present invention includes a first heat-sealing unit, a material receiving and conveying platform mechanism, and film rolls; a film roll is respectively arranged above and behind, and in front and below the feeding station of the first heat-sealing unit. After the films led out from the upper and lower film rolls are combined and heat-sealed in the first heat-sealing unit, the entire layer of products presses against the heat-sealing parts of the films and enters the feeding station; a material receiving and conveying platform mechanism is arranged at the discharging station of the first heat-sealing unit; upper and lower lifting anti-scald limiting gate valves are arranged between the first heat-sealing unit and the material receiving and conveying platform mechanism.

[0044] Among them, there is a first heat-sealing unit 100, which includes a frame 101 and a heat-sealing frame 110 fixedly arranged at a position of the frame close to the discharging station. Inside the heat-sealing frame, there are vertically arranged lifting slide rods 111, an upper anti-scalding roller 102 and a lower anti-scalding roller 102' (the upper and lower anti-scalding rollers) arranged in parallel with the lifting slide rods. The upper and lower anti-scalding rollers are located at positions close to the feeding station, and the lifting slide rods are located at positions close to the discharging station. Above and below the heat-sealing frame, there are respectively arranged heat-sealing cylinders 114, 114'. The piston rods of these two heat-sealing cylinders are fixedly connected to an upper heat-sealing base 112 and a lower heat-sealing base 112' correspondingly. Guide holes are arranged on the upper heat-sealing base and the lower heat-sealing base. The upper heat-sealing base is fixedly connected to an upper sealing die 113, and the lower heat-sealing base is fixedly connected to a lower sealing die 113'. The heat-sealing cylinders drive the upper heat-sealing base and the lower heat-sealing base to move up and down along the lifting slide rods through the guide holes, and drive the upper sealing die and the lower sealing die to move relatively to complete the heat-sealing action at the front end or the rear end of the product. The lifting slide rods ensure the guiding property and stability of the relative movement of the upper sealing die and the lower sealing die. The upper anti-scalding roller 102 is fixed on the upper heat-sealing base, and the lower anti-scalding roller 102' is fixed on the lower heat-sealing base. The upper and lower heat-sealing die positions 113, 113' are between the upper and lower anti-scalding rollers 102, 102' and the upper and lower lifting anti-scalding limit gates 103, 103'; the installation positions of the upper anti-scalding roller and the upper lifting anti-scalding limit gate are lower than the upper heat-sealing die, and the installation positions of the lower anti-scalding roller and the lower lifting anti-scalding limit gate are higher than the lower heat-sealing die. The upper anti-scalding roller synchronously rises and falls with the upper heat-sealing die, and the lower anti-scalding roller synchronously rises and falls with the lower heat-sealing die. The synchronous rising and falling structure ensures that the upper layer of the film is not burned by the upper sealing die between the upper anti-scalding roller and the upper lifting anti-scalding limit gate, and the lower layer of the film is not burned by the upper sealing die between the lower anti-scalding roller and the lower lifting anti-scalding limit gate. The upper and lower lifting anti-scalding limit gates are independently driven to rise and fall, and the upper lifting anti-scalding limit gate can be lowered and limited multiple times.

[0045] The upper layer of the film led out from the upper roll film passes through the upper anti-scalding roller, and the lower layer of the film led out from the lower roll film passes through the lower anti-scalding roller. The upper layer of the film and the lower layer of the film continue to be introduced between the upper sealing die and the lower sealing die. The upper sealing die and the lower sealing die are closed and heat-sealed to form the front-end heat-sealing of the product and the rear-end heat-sealing of the next group of products to be packaged.

[0046] The receiving and conveying platform mechanism 300 slides along the translating guide rail. Between the end of the guide rail and the heat-sealing frame of the first heat-sealing unit, there are arranged an upper lifting anti-scalding limit gate 103 and a lower lifting anti-scalding limit gate 103' (the upper and lower lifting anti-scalding limit gates). The upper and lower lifting anti-scalding limit gates are aligned with each other, and can tighten and limit or position the upper layer of the film and the lower layer of the film between the front and rear ends of the product entering the receiving and conveying tray, ensuring the flatness of the product against the upper layer of the film and the lower layer of the film in the front and rear directions to the greatest extent, eliminating the redundant space in the film packaging caused by unevenness, and at the same time making the packaging play a limiting role, and also having the anti-scalding function for the upper sealing die and the lower sealing die of the first heat-sealing unit.

[0047] A limiting thermal sealing device for layer-by-layer conveying and bagging of a container and a lid provided in Embodiment 2 of the present invention. This embodiment is based on Embodiment 1, and the difference lies in that: it further includes the structures of the second and third thermal sealing units themselves and the separable structure between the two.

[0048] The second thermal sealing unit includes a clutch frame 210 and a thermal sealing frame 220 fixed inside the clutch frame. A lifting slide rod 221 is vertically arranged inside the thermal sealing frame. Side sealing cylinders 222 and 222' are respectively arranged above and below the thermal sealing frame. The piston rods of the two side sealing cylinders are correspondingly fixed to the upper thermal sealing base 224 and the lower thermal sealing base 224'. Guide holes are arranged on the upper thermal sealing base and the lower thermal sealing base. The upper thermal sealing base is fixedly connected to the upper sealing die 223, and the lower thermal sealing base is fixedly connected to the lower sealing die 223'. The side sealing cylinders drive the upper thermal sealing base and the lower thermal sealing base to move up and down along the lifting slide rod through the guide holes, and drive the upper sealing die and the lower sealing die to move relatively to complete the side thermal sealing action of the product. The structures of the second thermal sealing unit and the third thermal sealing unit are the same. The distance between the second thermal sealing unit and the third thermal sealing unit is adjusted by a right-left hand screw 211 and a length adjusting rod 212 between the clutch frames of the two. The right-left hand screw and the length adjusting rod appear in groups at the four corners of the clutch frame. The length adjusting rods are driven by a motor. Double gears are arranged on the length adjusting rods. One drives the right-left hand screw, and the other drives the gear on another length adjusting rod arranged in parallel through a chain. The other gear on the other length adjusting rod drives the other right-left hand screw to rotate so that the two sides of the clutch frame can perform synchronous and stable separation and combination actions. The clutch frames of the second thermal sealing unit and the third thermal sealing unit can approach or move away from each other relatively; its function is that after the receiving and conveying platform for holding the products to be thermally sealed on both sides reaches the double-sided thermal sealing station, the clutch frames of the second thermal sealing unit and the third thermal sealing unit approach each other relatively from the initial station where they are far apart to the double-sided thermal sealing station, and the upper and lower sealing dies of the second thermal sealing unit and the third thermal sealing unit are closed relatively to complete the double-sided thermal sealing of the product; another function of it can also adjust the length of the products in the package through the grouped right-left hand screws and length adjusting rods.

[0049] In the first embodiment of the receiving and conveying platform mechanism 300, it includes a lower two-side anti-scalding clutch limiting device 310, a receiving and conveying platform 320 that can be separated and moved above the lower two-side anti-scalding limiting device, and a lifting and translation mechanism 330 that can respectively lift the lower two-side anti-scalding clutch limiting device and the receiving and conveying platform independently; the bottom of the lifting and translation mechanism approaches or moves away from the first thermal sealing unit between the second thermal sealing unit and the third thermal sealing unit along a guide rail.

[0050] The lower two-side anti-scalding clutch limiting device includes two side plates 311 (i.e., the lower two-side anti-scalding limiting gates 311) vertically arranged on both sides of the material receiving transfer disk. Below the extension plates 312 horizontally extending relative to the inner sides of the two side plates, two guide rods 313 and a telescopic lead screw are arranged. The telescopic lead screw is perpendicular to the traveling track of the material receiving transfer platform. The two guide rods are arranged on both sides of the telescopic lead screw to ensure the stable clutch of the two side plates. One end of the two guide rods and one telescopic lead screw is fixed to the bottom of one extension plate, and the other end is fixed to the bottom of the other extension plate. The telescopic lead screw is preferably a double-threaded lead screw, and it can also be other telescopic mechanisms. In the middle of the double-threaded lead screw 314, there is an annular gear 315 surrounding the screw shaft, which is meshed and connected with a horizontal rack. One end of the horizontal rack 316 is fixedly connected to the movable push rod of the clutch cylinder 317. Along the direction perpendicular to the clutch direction of the two side plates 311, the movable push rod drives the horizontal rack to move under the drive of the clutch cylinder, driving the rotation of the double-threaded lead screw. Threaded sleeves screwed with the double-threaded lead screw are respectively fixed below the two extension plates 312. Thus, under the drive of the clutch cylinder, the double-threaded lead screw makes the two side plates approach or move away from each other. The separable two side plates are used to limit the packaged products placed on the material receiving transfer disk to keep them compact, and then heat-seal the two sides of them, avoiding redundant space caused by uneven stacking, thereby limiting the length of the two-side heat-sealing; moreover, when the second heat-sealing unit and the third heat-sealing unit heat-seal the two sides of the packaged products, the two side plates also have the function of preventing the packaging film of the products from being scalded and broken.

[0051] The lifting and translation mechanism 330 includes a bottom mounting plate 331 connected to the guide rail slider, and a top mounting plate 332 above the bottom mounting plate; a motor is fixed on the top mounting plate, and the motor is connected to the double-threaded lead screw of the lower two-side anti-scalding clutch limiting device through a drive connection mechanism so that the two side plates can approach or move away from each other; a motor and a mounting seat for mounting the material receiving transfer disk are mounted on the bottom mounting plate. Through holes are provided on the top mounting plate, and the mounting seat can extend out through the through holes and pass through the gap between the extension plates, and its end is connected to the bottom of the material receiving transfer disk, so that the material receiving transfer disk is located above the lower two-side anti-scalding clutch limiting device. The top of a vertical rack 3321 is fixedly connected to the top mounting plate. Specifically, the side of the top of the rack is fixedly connected to the top mounting plate at the through hole; the gear connected to the output shaft of the motor on the bottom mounting plate is meshed with the rack and moves up and down along the rack, and further makes the guide rods fixed at the four corners of the top mounting plate move up and down in the guiding holes at the four corners of the bottom mounting plate, driving the top mounting plate to move up and down, and further driving the entire lower two-side anti-scalding clutch limiting device to move up and down independently.

[0052] When the two side plates of the lower two-side anti-scald clutch limit device are in the lower position at the initial station and are about to perform heat sealing, the two side plates lift the two exposed films on both sides and rise to a specified position, so that the two films droop naturally and stretch flat when wrapping the product, preventing the product to be packaged from pushing against the front heat-sealing parts of the upper and lower films and causing unevenness of the exposed two-side films during the conveying process between the second heat-sealing unit and the third heat-sealing unit, thus forming a redundant space.

[0053] The lifting and translation mechanism 330 further includes a sliding mounting plate 333. The bottom of the sliding mounting plate is slidably connected to the track, and the bottom mounting plate is above it. A motor is fixedly installed on the sliding mounting plate. The top of a vertical platform lifting rack is fixedly connected to the bottom of the bottom mounting plate. The gear connected to the output shaft of the motor meshes with the platform lifting rack 3311 and is connected to move up and down along the platform lifting teeth. Furthermore, the guide rods fixed at the four corners of the bottom mounting plate move up and down in the guiding holes at the four corners of the sliding mounting plate, driving the bottom mounting plate to move up and down, and driving the entire material receiving and conveying platform and the lower two-side anti-scald clutch limit device to move up and down. The up and down movement of the material receiving and conveying platform can adjust the appropriate material receiving height for receiving products of different sizes output by the first heat-sealing unit and adjust the position of the heat-sealing center line of the entire layer of products. The number of guide rods of the lifting and translation mechanism 330 can be set arbitrarily.

[0054] A limit heat-sealing device for layer-by-layer conveying and bagging of a container and a lid provided in Embodiment 4 of the present invention. This embodiment is based on Embodiment 3, and the difference lies in that: it further includes a layer-by-layer conveying and boxing mechanism 400.

[0055] The layer-by-layer transfer and packing mechanism 400 includes a translation sliding support frame, a lifting platform structure slidably connected below the translation sliding support frame, and upper two-side anti-scalding clutch limit devices connected below the lifting platform structure; the lifting platform slides back and forth along the translation sliding support frame between the material receiving station, the two-side heat sealing stations, and the packing station. The translation sliding support frame is a slide rail 420; the lifting platform structure is a bottom mounting plate 440 connected to the slide rail slider, a translation motor 430 for driving the bottom mounting plate to slide, and an up-and-down moving mounting plate 450 arranged below the bottom mounting plate; the upper two-side anti-scalding clutch limit devices 410 and a pressing and unloading plate 451 are mounted on the bottom surface of the up-and-down moving mounting plate; through holes are provided on the bottom mounting plate, a vertical rack 4501 fixedly mounted on the top surface of the up-and-down moving mounting plate passes through the through holes, and a packing unloading pressure motor 441 is fixedly mounted on the bottom mounting plate, and the gear connected thereto meshes with the vertical rack to drive the up-and-down moving mounting plate to move up and down. Two-side limit gate lifting cylinders are arranged on the up-and-down moving mounting plate, and the cylinder push rods thereof are connected to two-side limit gate mounting plates 460. The upper two-side anti-scalding clutch limit devices are fixedly mounted on the bottoms of the two-side limit gate mounting plates, and the two-side limit gate lifting cylinders drive the upper two-side anti-scalding clutch limit devices to move up and down. Corner guide rods are arranged between adjacent two of the bottom mounting plate, the up-and-down moving mounting plate, and the two-side limit gate mounting plates to maintain the stability of the up-and-down movement of the layer-by-layer transfer and packing mechanism. Through holes are also provided on the two-side limit gate mounting plates 460, a connecting rod 452 is fixedly arranged on the up-and-down moving mounting plate, and the end of the connecting rod passing through the through holes is fixedly connected to the pressing and unloading plate 451, and the pressing and unloading plate is used for flattening the products on the transfer tray or the packed products. The pressing and unloading plate 451 is located below the two-side limit gate mounting plate 460, and the upper two-side anti-scalding clutch limit devices 410 move up and down between the pressing and unloading plate and the up-and-down moving mounting plate.

[0056] The upper two-side anti-scalding clutch limiting device 410 includes two-side left-right threaded lead screws 411. The two ends of the two-side telescopic lead screws are respectively and correspondingly fixed with upper two-side anti-scalding limiting gates 412. The upper two-side anti-scalding limiting gates travel above the material receiving transfer platform 300 along the slide rail driven by the translation motor 430. The two-side limiting gate lifting cylinders push the upper two-side anti-scalding clutch limiting device to descend to the heat sealing station, press the products on the material receiving transfer platform, the left-right threaded lead screws contract, the upper two-side anti-scalding limiting gates clamp the products, the second and third units approach relatively, heat seal both sides of the products. The upper two-side anti-scalding limiting gates can, on the one hand, prevent the upper and lower sealing dies of the second and third units from scalding the packaging film, and on the other hand, can also prevent the products stacked in multiple columns from being tightly arched between columns during the back-end heat sealing. The upper two-side anti-scalding clutch limiting device can press them flat, ensuring that there is no redundant space in the upper layer of the film due to arching, and ensuring that the products are close to the sealing line to make the packaging compact and beautiful while the two ends of the products are restricted by the packaging and will not be scattered. Moreover, the upper two-side anti-scalding limiting gates approach or move away under the drive of the two-side left-right threaded lead screws, and also have the function of a manipulator. The upper two-side anti-scalding limiting gates can clamp the heat-sealed products and travel along the slide rail driven by the translation motor to the packing station. Among them, the packing station is located Figure 2 under the slide rail 420 extending from the general assembly drawing and the second and heat sealing units; under the drive of the packing unloading pressure motor, the upper two-side anti-scalding clutch limiting device descends to above the box opening, and puts the heat-sealed products into the box. Since there may be air gaps between the products in layers, the upper two-side anti-scalding clutch limiting device further continues to descend to press the products placed in the box flat.

[0057] A limiting heat sealing device for layer-by-layer conveying and bagging of a container and a lid provided in Embodiment 5 of the present invention. This embodiment is based on Embodiment 4, and the difference lies in that: it further includes a layer-by-layer material receiving and discharging unit.

[0058] The layer-by-layer material receiving and discharging unit is located at the feeding station of the first heat sealing unit. This unit includes a material receiving and discharging mechanism 500 and a lifting, translating and pushing mechanism 600 fixed on the frame of the first heat sealing unit. The two are parallel and the lifting unit is located above the material receiving and discharging mechanism.

[0059] The receiving and unloading mechanism comprises a slide seat 510' fixed on the frame of the first heat sealing unit and a layer receiving and unloading plate 520'. The slide seat is provided with a guide rail 511', a conveying chain 512', a pulley 513', and a conveying belt 514'; a motor 515' and a conveying wheel 516' are provided below the slide seat. The conveying wheels are arranged at both ends of the slide seat in the forward direction and on the bottom surface of the slide seat, and a part of the conveying wheels at both ends is exposed from the plate surface of the slide seat. The conveying belt is closed-looped and wound around each conveying wheel, and part of the conveying belt is on the slide seat. The top surface is parallel to the guide rail 511', and part of the conveyor belt is on the bottom surface of the sliding seat; a conveying pressure block 517' is fixed on the bottom surface of the layer-by-layer unloading tray, and the conveying pressure block is pressed on the conveyor belt. The motor drives the conveying wheel on the bottom surface of the sliding seat to drive the conveyor belt to rotate, and the friction between the conveying pressure block and the conveyor belt is used to drive the layer-by-layer unloading tray to move between the material receiving and the feeding station of the first heat sealing unit. The guide rail 511', the conveying chain 512' and the pulley 513' provide smooth movement support for the layer-by-layer unloading tray 520'. The bottom of the rear end of the layered unloading tray is provided with a pulley (slider) 521' adapted to the guide rail of the sliding seat, and a roller is provided on the front end face as a guide sliding device 522', so that when the layered unloading tray is at the unloading station of the first heat sealing unit, the lower film drawn out from the lower roll film passes through the gap between the guide sliding device and the lower anti-scalding roller at the first heat sealing unit and enters the space between the upper sealing mold and the lower sealing mold of the first heat sealing unit; the guide sliding device can prevent the lower film from being damaged by the travel error of the front end of the layered unloading tray when it advances to the station, and on the other hand, it has a roller sliding guiding effect on the lower film. Furthermore, the guide sliding device can also ensure that the layered unloading tray is away from the track pulley 521' and can press the film to slide on the receiving and conveying platform without being suspended. Fences 523' are set on both sides of the moving direction of the layered unloading tray to prevent the stacked products from tilting and falling apart at both ends.

[0060] The lifting and translation pushing mechanism 600 includes a horizontal guide rail 610 fixed on the first heat sealing unit frame, a lifting platform, and a pushing manipulator. The lifting platform is a mobile mounting plate 620 connected to the horizontal guide rail slider, a translation motor 630 that drives the mobile mounting plate to slide on the guide rail, and a bottom mounting plate 640 that is arranged below the mobile mounting plate and moves relative to the mobile mounting plate; the sliding track of the mobile mounting plate 620 is parallel to the travel track of the layer-by-layer unloading tray 520. A rack is arranged on the bottom mounting plate, and a motor is arranged on the mobile mounting plate. The gear connected to the motor output shaft is meshed with the rack. The up and down movement of the motor gear on the rack can make the four corner guide rods of the bottom mounting plate move up and down in the four corner guide holes of the mobile mounting plate.

[0061] The implementation method of pushing the products on the layer-by-layer unloading tray into the feeding station of the first heat-sealing unit is to install a manipulator 710' at the bottom of the lifting and translation pushing mechanism 600, and the manipulator moves along the horizontal guide rail 610. At the initial station, the layer-by-layer unloading tray reaches the feeding station of the first heat-sealing unit driven by the motor 515' and the conveyor belt 514'. The lifting and translation pushing mechanism moves along the horizontal guide rail in translation, and the bottom mounting plate descends at the bottom of the first heat-sealing unit. The manipulator on the bottom mounting plate enters from the end opening of the layer-by-layer unloading tray 520' in the traveling direction and pushes the products on the layer-by-layer unloading tray forward into the first heat-sealing unit.

[0062] A control method for feeding, bagging, and heat-sealing products of a layer-by-layer conveying and bagging limit heat-sealing device for containers and lids provided in Embodiment 6 of the present invention. This device is based on Embodiment 5, and this method includes the following steps:

[0063] 1) The front ends of the whole-layer products carried by the layer-by-layer unloading tray tightly abut against the film heat-sealing part, guiding the single films of the upper and lower coiled films. Driven by the translation motor, the layer-by-layer unloading tray together with the whole-layer products enters the tabletop of the receiving and conveying platform through the first heat-sealing unit.

[0064] 2) The upper and lower heat-insulating limit gate valves of the first heat-sealing unit first descend to the fence of the layer-by-layer unloading tray to block the rear ends of the whole-layer products. According to the pre-programmed stroke, the bilateral heat-insulating limit gates first rise to the limit, the upper bilateral heat-insulating limit gates first descend to the limit, and the translation motor drives the layer-by-layer unloading tray and the pushing manipulator above the tray to start retreating and resetting to standby at the same time.

[0065] 3) The lifting and translation mechanism drives the receiving and conveying platform to descend to the middle line position of the whole-layer product heat-sealing. The upper and lower heat-insulating limit gate valves of the first heat-sealing unit second descend to the middle sealing line. At the same time, the lower lifting and heat-insulating limit gate valve of the first heat-sealing unit also rises to the middle sealing line position.

[0066] 4) The upper and lower sealing dies of the first heat-sealing unit are closed to complete the heat-sealing of the rear ends of the whole-layer products. The single upper and lower layer films corresponding to the upper and lower coiled films are separated from the upper and lower layer films sleeved on the products. At the same time, the receiving and conveying platform and the upper two-side heat-insulating clutch limit device are synchronously started to translate to the bilateral heat-sealing station. Then the upper two-side heat-insulating clutch limit device descends, and the upper bilateral heat-insulating limit gates are closed and clamped on the products driven by the rotation of the positive and negative thread lead screws.

[0067] 5) The side heat-sealing cylinders of the second and third heat-sealing units correspondingly drive the upper and lower sealing dies to close to complete the heat-sealing of both sides of the whole-layer products and reset. The receiving and conveying platform rises to the horizontal plane of the receiving station, and the lower bilateral heat-insulating limit gates also descend and reset at the same time. The receiving and conveying platform and the upper bilateral heat-insulating limit gates translate and slide to the packing station according to their own strokes respectively.

[0068] A method for controlling the feeding and bagging of a container and a cover in a layer-by-layer transfer bag and the product packing of a limiting heat-sealing device provided in Embodiment 7 of the present invention. This device is based on Embodiment 5. The method includes the following steps:

[0069] a) After the controller receives the signal, at the receiving station, the lifting and translation pushing mechanism drives the manipulator to descend and push the whole layer of products to a specified position in the layer-by-layer receiving and discharging tray, and the receiving and discharging tray translation motor at the bottom of the sliding seat starts.

[0070] b) The layer-by-layer receiving and discharging tray carrying the whole layer of products slides along the track to stop at the upper and lower lifting anti-scald limiting gate of the first heat-sealing unit. At the same time, the lifting and translation pushing mechanism translates to the discharging station, drives the manipulator to descend and pushes the rear end of the whole layer of products on the layer-by-layer receiving and discharging tray forward, causing the front end of the whole layer of products to press against the film heat-sealing part to traction the upper and lower films and push the whole layer of products through the upper and lower mating spaces between the upper and lower lifting anti-scald limiting gates. The upper and lower lifting anti-scald limiting gates are mated up and down, corresponding to pressing and limiting the upper and lower films at the rear end of the whole layer of products to complete anti-scald limiting.

[0071] c) The first heat-sealing unit completes the front and rear end heat-sealing of the whole layer of products, and the second and third heat-sealing units complete the bilateral heat-sealing of the whole layer of products.

[0072] d) The receiving and conveying platform carrying the whole layer of products after heat-sealing rises and slides to the packing station. At the same time, the lower bilateral anti-scald limiting gate descends to the standby position, and the upper bilateral anti-scald limiting gate synchronously translates to the packing station.

[0073] e) At the packing station, the upper bilateral anti-scald limiting gate picks up the whole layer of products after heat-sealing and packs them; the packing pressure-relieving material motor provided on the lifting platform structure drives the pressure-discharging plate connected to the rack to descend according to the pre-programmed stroke to press the whole layer of products to complete packing; the receiving and conveying platform and the upper bilateral anti-scald limiting gate are all reset to the receiving standby state to complete the whole process of heat-sealing action.

[0074] To ensure that products of various specifications can be evenly conveyed, the packing width adjustment feature of this device determines the packing width based on the translation stroke of the layer-by-layer receiving and discharging tray and the translation stroke of the pushing plate under the lifting unit. The length of the packing length can be adjusted arbitrarily by the telescopic adjustment device in the middle of the two side heat-sealing dies to determine the length of the two side heat-sealings.

[0075] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. The limiting heat-sealing device for the layer-by-layer transfer bag of the container and the lid, characterized in that It includes a first heat sealing unit, a film roll respectively arranged at the upper rear and lower front of the first heat sealing unit, a layer-by-layer unloading tray, and a material receiving and conveying platform mechanism arranged at the material discharging station of the first heat sealing unit; After the upper and lower layers of the film correspondingly drawn out from the upper and lower rolls are heat-sealed in the first heat-sealing unit, the unloading tray carries the whole layer of the product and moves to the first heat-sealing unit. The whole layer of the product presses against the heat-sealing part of the film, and the upper and lower layers of the film are pulled into the feeding station of the first heat-sealing unit. An up-and-down lifting anti-scalding limit gate is set between the first heat-sealing unit and the receiving and conveying platform mechanism. The front end surface of the layer-by-layer unloading tray is provided with a roller as a guide sliding device, which can guide the lower film to prevent the front end of the layer-by-layer unloading tray from causing impact damage to the lower film.

2. The limiting heat-sealing device for the layer-by-layer conveying and bagging of the container and the lid according to claim 1, characterized in that, It also includes a lifting and translation pushing mechanism for receiving and unloading products on the layered receiving and unloading tray, and a sliding seat for sliding movement on the rails of the layered receiving and unloading tray; Fences are arranged on both sides of the layered unloading tray to limit the two ends of the conveyed products and prevent them from being scattered; a sliding block is installed at the rear of the bottom of the layered unloading tray and is slidably connected with the rail of the sliding seat to form a sliding pair of the layered unloading tray; A translation motor is arranged at the bottom of the slide seat to independently drive the layer-by-layer unloading tray, and cooperates with the sliding pair of the layer-by-layer unloading tray to drive the layer-by-layer unloading tray to slide to a designated position according to the controller instruction; The first heat sealing unit comprises a heat sealing frame, in which an upper sealing mold and a lower sealing mold are arranged, which can move up and down to complete the mold closing heat sealing. The upper sealing film is driven by a heat sealing cylinder through an upper heat sealing base, and the lower sealing film is driven by another heat sealing cylinder through a lower heat sealing base. An upper anti-scalding roller is fixed on the upper heat sealing base, and a lower anti-scalding roller is fixed on the lower heat sealing base. The upper and lower heat sealing molds are located between the upper and lower anti-scalding rollers and the upper and lower lifting anti-scalding limiting gates. The upper anti-scalding roller and the upper lifting anti-scalding limiting gate are installed at a lower position than the upper heat sealing mold, and the lower anti-scalding roller and the lower lifting anti-scalding limiting gate are installed at a higher position than the lower heat sealing mold. The upper anti-scalding roller rises and falls synchronously with the upper heat sealing mold, and the lower anti-scalding roller rises and falls synchronously with the lower heat sealing mold; the upper and lower lifting anti-scalding limiting gates are independently driven to rise and fall, and the upper lifting anti-scalding limiting gate can be lowered and limited multiple times.

3. The limiting heat-sealing device for the layer-by-layer conveying and sleeving of the container and the lid according to claim 2, characterized in that, The lifting and translational pushing mechanism includes a lifting platform, a sliding pair arranged above the lifting platform, and a pushing robot; the lifting rack of the lifting platform and the guide rod tail end platform fix the pushing robot, the lifting platform is lifted and lowered at the material receiving station, and slides and slides to the unloading station and descends. According to the instructions, the pushing robot pushes the products on the layer-by-layer receiving and unloading tray through the first heat sealing unit into the top of the material receiving and conveying platform.

4. The limit heat-sealing device for the layer-by-layer conveying and bagging of the container and the lid according to claim 3, characterized in that, The material receiving and conveying platform mechanism includes two lower anti-scalding clutch limit devices, a material receiving and conveying platform arranged above the two lower anti-scalding clutch limit devices, and a lifting and translation mechanism capable of independently lifting and lowering the two lower anti-scalding clutch limit devices and the material receiving and conveying platform; The lifting and translation mechanism can lift and slide between the material receiving station, the double-sided heat sealing station, and the packing station of the material receiving and conveying platform mechanism, and the material receiving and conveying platform can be adjusted according to the packing length; the lower two-sided anti-scalding clutch limiting device includes a lower double-sided anti-scalding limiting brake, a first left-right hand lead screw for adjusting the corresponding distance between the lower double-sided anti-scalding limiting brakes, a connecting transmission member adapted to the gear fixed on the first left-right hand lead screw, and a driving source for driving the connecting transmission member.

5. The limiting heat-sealing device for the layer-by-layer conveying and bagging of the container and the lid according to claim 4, characterized in that, The device further includes a second heat sealing unit and a third heat sealing unit, and the material receiving and conveying platform mechanism is arranged between the second heat sealing unit and the third heat sealing unit; an adjusting device for adjusting the clutch distance between the second heat sealing unit and the third heat sealing unit is arranged between the second heat sealing unit and the third heat sealing unit.

6. The limiting thermal sealing device for the layer-by-layer transfer bag of the container and the lid according to claim 5, characterized in that, The second heat sealing unit and the third heat sealing unit respectively include a heat sealing frame, an upper sealing die and a lower sealing die arranged in the heat sealing frame to complete the side heat sealing of the product by moving up and down in a mating manner, and a clutch frame for fixing the heat sealing frame therein; side heat sealing cylinders are respectively arranged above and below the heat sealing frame, and the two side heat sealing cylinders respectively drive the upper sealing die and the lower sealing die to move in a mating manner. The adjusting device includes at least two groups of second left-right hand lead screws and length adjusting rods, and at least one chain or synchronous belt; the two ends of the second left-right hand lead screws and the length adjusting rods are respectively connected to the clutch frames of the second heat sealing unit and the third heat sealing unit, one end of the length adjusting rod is driven by a motor to rotate, and a double gear is arranged at the other end. One of the gears meshes with the second left-right hand lead screw of the same group, and the other gear is connected to the chain or synchronous belt to drive the rotation of the length adjusting rod of the other group; the other gear of the other group of length adjusting rods drives the left-right hand lead screw of the same group to achieve the required center distance.

7. The limiting heat-sealing device for the layer-by-layer conveying bag of the container and the lid according to claim 6, characterized in that, The device further includes a translation sliding support frame, a lifting platform structure slidably connected to the lower part of the translation sliding support frame, and an upper two-sided anti-scalding clutch limiting device connected to the lower part of the lifting platform structure; the lifting platform structure slides back and forth along the translation sliding support frame between the material receiving station, the two-side heat sealing stations, and the packing station. The upper two-sided anti-scalding clutch limiting device includes an upper double-sided anti-scalding limiting brake, a third left-right hand lead screw for adjusting the corresponding distance between the upper double-sided anti-scalding limiting brakes, a connecting transmission member adapted to the gear fixed on the third left-right hand lead screw, and a driving source for driving the connecting transmission member. The distance between the upper double-sided anti-scalding limiting brakes is adjusted to limit and clamp the product or pick up the product for packing; a pressing and unloading plate is arranged below the upper two-sided anti-scalding clutch limiting device, and the lifting platform structure can respectively lift the upper two-sided anti-scalding clutch limiting device and the pressing and unloading plate independently. After the product is packed, the pressing and unloading plate independently descends according to the stroke command of the controller to flatten the product.

8. A control method for feeding a tray, bagging, and heat-sealing products, which is applied to the limited-position heat-sealing device for layer-by-layer conveying and bagging of the container and the lid described in claim 7, and is characterized in that, The method includes Pressing the front end of the whole layer of products carried by the layer-by-layer material receiving and unloading tray tightly against the film heat sealing part to guide the single-piece films of the upper and lower two roll films. Driven by the translation motor, the layer-by-layer material receiving and unloading tray together with the whole layer of products enters the table surface of the material receiving and conveying platform through the first heat sealing unit. The rising and falling anti-scald limit gate of the first heat-sealing unit descends for the first time until the fence of the layer-by-layer receiving and discharging tray blocks the rear end of the whole layer of products. The double-sided anti-scald limit gates rise to the first upper limit according to the pre-programmed stroke, and the double-sided upper anti-scald limit gates descend to the first lower limit. The translation motor drives the layer-by-layer receiving and discharging tray and the pushing manipulator above the tray to start retracting and resetting to standby at the same time; The lifting and translation mechanism drives the material receiving and conveying platform to descend to the heat-sealing center line position of the whole layer of products. The rising and falling anti-scald limit gate of the first heat-sealing unit descends to the middle sealing line for the second time. At the same time, the lower rising and falling anti-scald limit gate of the first heat-sealing unit also rises to the middle sealing line position; The upper and lower sealing dies of the first heat-sealing unit close to complete the heat-sealing of the rear end of the whole layer of products. The single-layer upper and lower films corresponding to the upper and lower coiled films are separated from the upper and lower films sleeved on the products. At the same time, the material receiving and conveying platform and the upper two-sided anti-scald clutch limit device start to translate synchronously to the double-sided heat-sealing station. The upper two-sided anti-scald clutch limit device descends, and the double-sided upper anti-scald limit gate closes and clamps the products under the drive of the third right and left-handed lead screw rotation; The side heat-sealing cylinders of the second and third heat-sealing units drive the upper and lower sealing dies to close to complete the heat-sealing of both sides of the whole layer of products and reset. The material receiving and conveying platform rises to the horizontal plane of the material receiving station, and the double-sided lower anti-scald limit gate also descends and resets at the same time. The material receiving and conveying platform and the double-sided upper anti-scald limit gate translate and slide to the packing station according to their respective strokes.

9. A method for controlling the feeding of trays, bagging, and packing of products, which is applied to the limiting heat-sealing device for layer-by-layer conveying and bagging of containers and lids as described in claim 7, characterized in that, The method includes: After receiving the signal, the controller drives the manipulator to descend at the material receiving station to push the whole layer of products to the specified position in the layer-by-layer receiving and discharging tray, and the receiving and discharging tray translation motor at the bottom of the sliding seat starts; The layer-by-layer receiving and discharging tray carries the whole layer of products and slides along the track to stop at the upper and lower rising and falling anti-scald limit gates of the first heat-sealing unit. At the same time, the lifting and translation pushing mechanism translates to the discharging station, drives the manipulator to descend and pushes the rear end of the whole layer of products on the layer-by-layer receiving and discharging tray forward, causing the front end of the whole layer of products to press against the film heat-sealing part to pull the upper and lower films and push the whole layer of products through the upper and lower alignment spaces between the upper and lower rising and falling anti-scald limit gates. The upper and lower rising and falling anti-scald limit gates are aligned up and down, and correspondingly press and limit the upper and lower films at the rear end of the whole layer of products to complete anti-scald limiting; The first heat-sealing unit completes the front and rear end heat-sealing of the whole layer of products, and the second and third heat-sealing units complete the double-sided heat-sealing of the whole layer of products; The material receiving and conveying platform carrying the whole layer of products after heat-sealing rises and slides to the packing station. At the same time, the double-sided lower anti-scald limit gate descends to the standby position, and the double-sided upper anti-scald limit gate synchronously translates to the packing station; At the packing station, the double-sided upper anti-scald limit gate picks up the whole layer of products after heat-sealing and packs them. The packing unloading pressure motor arranged on the lifting platform structure drives the pressure unloading plate connected to the rack to descend according to the pre-programmed stroke to press and pack the whole layer of products. The material receiving and conveying platform and the double-sided upper anti-scald limit gate all reset to the material receiving standby state to complete the whole process of heat-sealing action.

Images