A microwave retort bag and its processing equipment

Abstract

The application relates to the field of food packaging bags, in particular to a microwave cooking bag and a processing equipment thereof. The microwave cooking bag comprises a bag body and a buffer bag fixed on one side of the bag body and communicating with the inside of the bag body; the inside of the bag body and the inside of the buffer bag communicate and are closed areas; a closed pressure relief space is arranged on the side of the buffer bag away from the bag body; a pressure relief opening communicating with the outside is arranged at the pressure relief space; and a low-pressure-bearing adhesive line is arranged between the pressure relief space and the inside of the buffer bag. The application has the effect of realizing pressure relief of the microwave cooking bag and reducing the influence of external water on food in the bag body.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of food packaging bags, in particular to a microwave cooking bag and a processing equipment thereof. BACKGROUND

[0002] The microwave cooking bag has the performances of durable packaging, stable storage and bacteria prevention, and is widely used in the field of semi-mature convenient food packaging.

[0003] When the food in the microwave cooking bag is heated by using a microwave oven or a pot, the air in the bag will expand due to heat, so that the pressure in the bag increases, which is easy to cause the steam to break through the cooking bag and splash the food, causing a safety accident.

[0004] At present, in order to reduce the situation that the gas in the microwave cooking bag is heated and breaks through the cooking bag to cause an accident, a pressure relief port is generally arranged on one side of the microwave cooking bag, and a low-pressure bearing adhesive line is arranged between the pressure relief port and the inside of the bag body of the microwave cooking bag. When the pressure in the microwave cooking bag increases, the pressure will break the low-pressure bearing adhesive line, so that the pressure in the microwave cooking bag is discharged from the pressure relief port, thereby realizing pressure relief in the inside of the microwave cooking bag.

[0005] However, when the food in the microwave cooking bag is heated by using a pot, when the pressure in the bag is discharged from the pressure relief port, it also means that the inside of the bag is communicated with the outside, and the water vapor or water in the outside is also easy to reach the inside of the microwave cooking bag through the pressure relief port, thereby affecting the taste of the food in the microwave cooking bag. SUMMARY

[0006] In order to realize pressure relief while reducing the influence of the water in the outside on the food in the bag, the present application provides a microwave cooking bag and a processing equipment thereof.

[0007] In a first aspect, the present application provides a microwave cooking bag, which adopts the following technical scheme:

[0008] The microwave cooking bag comprises a bag body and a buffer bag fixed on one side of the bag body, the inside of the bag body forms a placing space for placing food, the inside of the buffer bag forms a buffer space communicated with the placing space, the inside of the buffer bag forms a pressure relief space, the pressure relief space is located on the side of the buffer space away from the placing space, a pressure relief port is arranged on the buffer bag, the pressure relief space is communicated with the outside through the pressure relief port, and a low-pressure bearing adhesive line is arranged between the buffer space and the pressure relief space.

[0009] By using the above technical scheme, since the pressure generated by microwave heating is greater than the pressure generated by pot boiling, when the food in the bag is heated by pot boiling, the increased pressure in the bag will reach the buffer bag, so that the space in the bag is increased to meet the requirement of the increased pressure, thereby playing a buffering role, avoiding the steam breaking through the bag to cause a safety accident, and achieving pressure relief while reducing the influence of external water on the taste of the food in the bag.

[0010] Optionally, the buffer bag is provided with a low-pressure sealing line, the low-pressure sealing line is located on the side of the buffer space away from the placing space, and the low-pressure sealing line is located on both sides of the pressure relief port and connected with the low-pressure adhesive line.

[0011] By using the above technical scheme, when the increased air pressure in the bag reaches the buffer space, with the continuous increase of the air pressure, the air pressure will reach the low-pressure adhesive line along the low-pressure sealing line, and the low-pressure adhesive line will be broken, so that the air pressure is finally discharged from the pressure relief port of the pressure relief space.

[0012] Optionally, the side of the low-pressure sealing line close to the buffer space is arc-shaped, and the distance between the low-pressure sealing line and the placing space gradually approaches from the side away from the pressure relief port to the side close to the pressure relief port.

[0013] By using the above technical scheme, the pressure reaching the buffer space can reach the low-pressure adhesive line along the arc-shaped low-pressure sealing line, so as to smoothly break the low-pressure adhesive line to achieve pressure relief.

[0014] In the second aspect, the application provides a processing equipment for microwave cooking bags, which adopts the following technical scheme:

[0015] A processing equipment for microwave cooking bags is used for processing the microwave cooking bag according to any one of claims 1-3, and comprises a mounting table, wherein the mounting table is sequentially provided with the following components from one end to the other end:

[0016] A material placing device is used for placing raw materials.

[0017] A folding and shaping device is installed on the mounting table and used for folding the two sides of the plastic film on the raw material inward to form the bag body and the buffer bag.

[0018] A first hot melting device is used for bonding the end of the buffer bag away from the bag body.

[0019] a second hot melting device for processing the low-pressure sealing line and the low-pressure adhesive line;

[0020] a third hot melting device for hot melting the periphery of the bag body;

[0021] a pulling device for pulling the plastic film to pull the plastic film from the feeding device;

[0022] a punching device for processing the pressure relief port;

[0023] a cutting device for cutting the plastic film to cut the plastic film into bag bodies with uniform length.

[0024] By adopting the above technical scheme, in use, the plastic film is placed on the feeding device, and then one end of the plastic film is pulled forward by the pulling device, when the plastic film reaches the folding and shaping device, the folding and shaping device bends the two sides of the plastic film inward to form a double-layer bag body and a buffer bag. Then the first hot melting device preliminarily adheres the end of the buffer bag away from the bag body, then the second hot melting device processes the low-pressure sealing line and the low-pressure adhesive line, and finally the third hot melting device hot melts the periphery of the bag body, thereby completing the hot melting work of the microwave cooking bag. Then the punching device processes the pressure relief port, thereby completing the processing work of the microwave cooking bag. Finally, the cutting device cuts the plastic film into bag bodies with uniform length, thereby completing the automatic segmentation work of the bag bodies and realizing the automatic processing of the bag bodies.

[0025] Optionally, the folding and shaping device comprises a fixed plate fixed on the mounting table, a shaping plate fixed on the fixed plate, and a fixing member for fixing the position of the plastic film on the shaping plate. The lower side of the fixed plate is provided with a gap for the plastic film to be placed in. The fixing member and the shaping plate are provided with a gap for the plastic film to pass through.

[0026] By adopting the above technical scheme, in use, the plastic film is placed on the lower side of the fixed plate, and the two sides of the plastic film pass through the gap between the fixing member and the shaping plate, so that the side edges of the plastic film abut against the shaping plate, thereby realizing the folding of the plastic film.

[0027] Optionally, the mounting table is fixed with a first support, the first hot melting device is provided with two first hot melting devices which are both mounted on the first support, and the two first hot melting devices are respectively located on the two sides of the shaping plate. The first hot melting device comprises a belt conveying assembly mounted on the first support and a second hot melting knife fixed on the first support. The second hot melting knife is located in the belt conveying assembly, and the first hot melting devices form a first heating space for the plastic film to slide in between the two first hot melting devices.

[0028] By adopting the above technical solution, when the plastic film reaches the first hot melt device, it will pass through the first heating space between the two first hot melt devices. The belt conveyor assembly will drive the plastic film to move, and at the same time, the second hot melt blade located in the belt conveyor assembly will heat the plastic film, so that the plastic film melts and the two layers of plastic film are bonded together, thus achieving preliminary bonding.

[0029] Optionally, the second hot-melt device includes a first hot-melt blade slidably connected to the mounting platform and a first drive mechanism that drives the first hot-melt blade to move in a U-shape, the U-shape movement trajectory of the first hot-melt blade being on the same horizontal plane; the mounting platform is also provided with a synchronizing element that can move synchronously with the first hot-melt blade, the synchronizing element being located on the side of the plastic film away from the first hot-melt blade, and a second heating space is formed between the synchronizing element and the first hot-melt blade for the plastic film to slide into.

[0030] By adopting the above technical solution, when the plastic film reaches the second hot-melt device, it will pass through the second heating space. At this time, the first drive mechanism will drive the first hot-melt blade to move closer to the synchronous member. The plastic film will be clamped by the first hot-melt blade against the synchronous member. Since the first drive mechanism will drive the first hot-melt blade in a U-shaped motion, it will move along the direction of the plastic film's movement, thus maintaining synchronization with the plastic film's movement. Simultaneously, the synchronous member will slide relative to the mounting platform to maintain synchronization with the first hot-melt blade, allowing the plastic film to be hot-melted without stopping, resulting in higher processing efficiency. After the first hot-melt blade has advanced a set length with the plastic film, the first drive mechanism will drive the first hot-melt blade to move away from the sliding plate, thus separating the first hot-melt blade from the plastic film. Then, the first drive mechanism will drive the first hot-melt blade to move away from the plastic film's forward movement, and after moving a set length, it will move towards the sliding plate, completing a U-shaped motion until it re-engages with the plastic film to perform the hot-melt operation for the next section of the plastic film.

[0031] Optionally, the third hot-melt device includes a second hot-melt blade and a second drive mechanism for driving the second hot-melt blade in a U-shaped motion. The second hot-melt blade includes a third blade and a fourth blade, which are respectively used to process the portions of the bag body located on both sides of the cushioning bag. Two second drive mechanisms are provided, which are respectively used to drive the third blade and the fourth blade in a U-shaped motion. The U-shaped motion trajectory of the third blade is in the same vertical plane, and the U-shaped motion trajectory of the fourth blade is in the same vertical plane. A third heating space is formed between the third blade and the fourth blade for the plastic film to slide through.

[0032] By adopting the above technical solution, when the plastic film reaches the third heat-sealing device, it will pass through the third heating space. At this time, the second drive mechanism will drive the second heat-sealing blade vertically downward to abut against the plastic film, thereby heating the bag body formed by the plastic film and heat-sealing the perimeter of the bag. The setting of two second heat-sealing devices will achieve heating of the parts of the bag body located on both sides of the cushion bag. The second drive mechanism will first drive the second heat-sealing blade downward until it abuts against the plastic film, thereby heating the plastic film. As the plastic film moves forward, the second drive mechanism will also drive the second heat-sealing blade forward with the plastic film, allowing the second heat-sealing blade to stop on the plastic film. After advancing a set length, the second drive mechanism will drive the second heat-sealing blade upward and then drive the second heat-sealing blade to move away from the plastic film. Finally, the second drive mechanism will drive the second heat-sealing blade downward to complete a U-shaped movement until the second heat-sealing blade abuts against the next position of the plastic film to be heat-sealed, and so on.

[0033] Optionally, the second driving mechanism includes a second limiting plate fixed to one side of the mounting platform, a second linear drive member fixed to the mounting platform and located on one side of the second limiting plate, and a second driving rod mounted on the second hot melt knife. The second limiting plate has a U-shaped second limiting groove. One end of the second driving rod away from the second hot melt knife is embedded in the second limiting groove. A second connecting rod is connected between the moving part of the second linear drive member and the second driving rod. One end of the second connecting rod is rotatably connected to the moving part of the second linear drive member, and the other end of the second connecting rod is rotatably connected to the second driving rod.

[0034] By adopting the above technical solution, when the second linear drive is started, the second linear drive will drive the second driving rod to move through the second connecting rod. Due to the setting of the second limiting groove, the second driving rod moves in the second limiting groove, thereby driving the second hot melt knife to move in a U-shape.

[0035] Optionally, the second driving rod is slidably connected to the second hot melt knife. A contact member is provided between the second hot melt knife and the second driving rod to move the second hot melt knife closer to the direction of the third heating space, and a reset member is provided to move the second hot melt knife away from the direction of the third heating space. When the second driving mechanism moves the second hot melt knife in a U-shape, when the second hot melt knife moves closer to the bag body, it is acted upon by the contact member to move closer to the direction of the third heating space to abut against the cushioning bag; when the second hot melt knife moves away from the bag body, it is restricted by the reset member from moving closer to the direction of the third heating space.

[0036] By adopting the technical scheme, when the driving rod drives the second hot melting knife to move downward, the second hot melting knife is also driven to move in the direction of the third heating space by the abutting member, so that the two sides of the buffer bag can be reinforced. When the heating setting time is reached, the second hot melting knife moves upward to move away from the plastic film, and the second hot melting knife is also driven to move away from the third heating space by the reset member, so that the second hot melting knife is reset.

[0037] In summary, the present application includes at least one of the following beneficial technical effects:

[0038] 1. The present application is provided with a buffer bag and a pressure relief port, so that when the pressure generated by cooking food in the bag is low, the increased pressure can enter the buffer bag to increase the gas storage space, reduce the probability of the bag being burst by the pressure, and reduce the probability of external water entering the bag due to communication between the inside and outside of the bag. When the food in the bag is heated by microwave heating, the high pressure generated in the bag will break through the low pressure-resistant bonding line and enter the pressure relief space, and finally be discharged from the pressure relief port.

[0039] 2. The microwave cooking bag processing equipment can realize automatic processing of the microwave cooking bag, and the plastic film does not need to stop during processing, so the processing efficiency is higher.

[0040] 3. The first driving mechanism drives the first hot melting knife to move in a character shape, and the second driving mechanism drives the second hot melting knife to move in a character shape, so that when the first hot melting knife and the second hot melting knife are used to heat and melt the plastic film, the first hot melting knife and the second hot melting knife can move together with the plastic film when abutting on the plastic film, so that the first hot melting knife and the second hot melting knife can abut on the plastic film for a set period of time without affecting the normal conveying of the plastic film, and the processing efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is the overall structure schematic diagram of the microwave cooking bag of the present application.

[0042] Figure 2 is the schematic diagram of the microwave cooking bag of the present application for showing the buffer bag structure.

[0043] Figure 3 is the schematic diagram for showing the sealing line structure.

[0044] Figure 4 is the overall structure schematic diagram of the microwave cooking bag processing equipment of the present application.

[0045] Figure 5 is the schematic diagram for showing the folding and shaping device and the first hot melting device structure.

[0046] Figure 6 is a schematic diagram made to embody the structure of the second hot melt device.

[0047] Figure 7 is a schematic diagram made to embody the structure of the third hot melt device.

[0048] Figure 8 is a schematic diagram made to embody the structure of the second driving mechanism.

[0049] Figure 9 is a schematic diagram made to embody the structure of the abutting member.

[0050] Figure 10 is a schematic diagram made to embody the structure of the resetting member.

[0051] Figure 11 is a schematic diagram made to embody the structure of the punching device and the cutting device.

[0052] Figure 12 is a schematic diagram made to embody the punching device from another perspective for the isolation space.

[0053] Figure 13 is a schematic diagram made to embody the structure of the drill bit.

[0054] Explanation of reference signs: 01, bag body; 011, placing space; 02, buffer bag; 021, buffer space; 022, low-pressure-admissible adhesive line; 023, low-pressure-admissible sealing line; 024, pressure relief space; 025, pressure relief port; 03, sealing line; 031, first sealing line; 032, second sealing line; 04, third sealing line; 05, collection box; 1, mounting table; 11, first support; 2, discharging device; 21, support; 22, mounting roller; 3, folding and shaping device; 31, support rod; 32, fixing plate; 33, shaping plate; 34, fixing piece; 341, guide rail; 342, mounting block; 343, abutting rod; 4, first hot melting device; 41, belt conveying assembly; 411, first pulley; 412, second pulley; 413, transmission belt; 414, first motor; 42, heating strip; 43, first heating space; 5, second hot melting device; 51, first hot melting knife; 511, first knife; 512, second knife; 513, connecting knife; 514, first knife seat; 52, first driving mechanism; 521, first linear driving piece; 522, first limiting plate; 523, first driving rod; 524, first limiting groove; 5241, first groove; 5242, second groove; 525, first connecting rod; 53, synchronizing piece; 54, second heating space; 6, third hot melting device; 61, second hot melting knife; 611, third knife; 6111, knife plate; 6112, second knife seat; 6113, mounting groove; 612, fourth knife; 62, second driving mechanism; 621, second limiting plate; 622, second driving rod; 623, second linear driving piece; 624, second limiting groove; 6241, third groove; 6242, fourth groove; 625, second connecting rod; 63, abutting piece; 631, first wedge-shaped block; 632, second wedge-shaped block; 64, resetting piece; 641, baffle; 642, resetting spring; 65, belt conveyor; 7, pulling device; 71, driving roller; 72, pulling motor; 8, punching device; 81, fixing seat; 82, punching cylinder; 83, drill bit; 84, partition plate; 85, isolation space; 9, cutting device; 91, fixing frame; 92, cutting cylinder; 93, cutting knife. DETAILED DESCRIPTION

[0055] The following will be described in detail below with reference to the accompanying drawings. Figures 1-13 The present application is further described in detail.

[0056] In liquid water, there is an attractive force between water molecules, so that the water molecules keep a relatively stable arrangement within a certain range. When water is heated, the kinetic energy of water molecules increases, so that part of the water molecules can overcome the attractive force between each other, and change from liquid to gas to form water vapor. In the process of water evaporation, the water molecules change from liquid to gas, and the interaction between the molecules is weakened, and the distance between the molecules is increased. Because the interaction between gas molecules is weak, the distance between the molecules can be larger than the distance between liquid molecules. Therefore, the volume occupied by water after evaporation will be larger than that of liquid water.

[0057] And when heated by microwave, the water vapor molecules move very fast, because the boiling point of water is related to the pressure, and the high-frequency alternating current generates a magnetic field to make the water molecules oscillate in a certain direction, the water starts to be in a high-energy state and is easy to separate from the liquid surface to form steam, resulting in a large amount of water vapor when heated by microwave. Under the same heating conditions, the volume of water vapor produced by steaming is much smaller than that produced by microwave heating.

[0058] Based on this, the embodiment of the application discloses a microwave steaming bag. Referring to Figure 1 and Figure 2 , the microwave steaming bag comprises a bag body 01 and a buffer bag 02 fixed on one side of the bag body 01.

[0059] The bag body 01 is a double-layer plastic film material, three sides of the bag body 01 are closed to form a placing space 011 for placing food, and the other side forms an opening for placing food. The buffer bag 02 is also a double-layer plastic film material, one side of the buffer bag 02 is connected with the bag body 01, and the three sides of the buffer bag 02 not connected with the bag body 01 are closed, so that a buffer space 021 is formed in the buffer bag 02 and communicates with the placing space 011. A low-pressure adhesive line 022 is also processed on the buffer bag 02, so that a pressure relief space 024 is formed in the buffer bag 02 and is sealed on four sides, the pressure relief space 024 is located on the side of the buffer space 021 away from the placing space 011, a pressure relief port 025 is opened on the buffer bag 02 and is located at the buffer space 021, so that the buffer space 021 communicates with the outside through the pressure relief port 025. In use, the food is placed in the placing space 011 from the opening of the bag body 01, and the opening is closed. When the food in the bag body 01 needs to be heated, if water cooking heating is used, because the volume of water vapor generated in the bag body 01 under the cooking state is small, the air pressure in the bag body 01 is also small, and the air pressure generated in the bag body 01 can directly reach the buffer bag 02, thereby increasing the accommodation area of the bag body 01, avoiding the water vapor from breaking the bag body 01 and causing safety accidents, and also reducing the influence of external water on the taste of the food in the bag body 01. If microwave heating is used, because the volume of water vapor generated in the bag body 01 under microwave heating is large, the air pressure in the bag body 01 will be large. During heating, as the air pressure in the bag body 01 gradually increases, the air pressure first reaches the buffer bag 02, and as the air pressure continues to increase, the air pressure will break the low-pressure adhesive line 022 and reach the pressure relief space 024, and finally be discharged from the pressure relief port 025, thereby achieving pressure relief.

[0060] The low-pressure adhesive line 022 is in the shape of a V as a whole, and the V-shaped opening of the low-pressure adhesive line 022 faces the buffer space 021, so that the increased water vapor first contacts the bottom end of the V-shaped low-pressure adhesive line 022 and breaks the low-pressure adhesive line 022 from the bottom end of the V-shaped low-pressure adhesive line 022.

[0061] Referring to Figure 2The low-pressure sealing line 023 is located on the two sides of the low-pressure adhesive line 022, the buffer space 021 is located on the side of the low-pressure sealing line 023 facing the bag body 01, and the side of the low-pressure sealing line 023 facing the buffer space 021 is arc-shaped, and the distance between the side of the low-pressure sealing line 023 facing the buffer space 021 and the bag body 01 gradually increases from the side away from the low-pressure adhesive line 022 to the side close to the low-pressure adhesive line 022. When the air pressure in the bag body 01 reaches the buffer bag 02, as the air pressure gradually increases, the air pressure will reach the low-pressure adhesive line 022 along the low-pressure sealing line 023, thereby breaking the low-pressure adhesive line 022 to achieve pressure relief.

[0062] The implementation principle of the microwave cooking bag according to an embodiment of the present application is as follows: when the food in the microwave cooking bag needs to be heated, when heated by boiling, the volume of water vapor generated in the bag body 01 is small, the increased air pressure reaches the buffer bag 02, the accommodation area of the gas is increased, the bag is prevented from being blown up, and at the same time, the water from the outside is prevented from reaching the bag body 01, so that the taste of the food is maintained. When heated by microwaves, the volume of water vapor generated in the bag body 01 is large, the increased air pressure first reaches the buffer bag 02, as the air pressure gradually increases, the increased air pressure will contact the V-shaped end of the low-pressure adhesive line 022, and at the same time, another air pressure will also reach the low-pressure adhesive line 022 along the low-pressure sealing line 023, and finally the low-pressure adhesive line 022 will be broken, so that the gas reaches the buffer bag 02 and is finally discharged from the pressure relief port 025.

[0063] The embodiment of the present application also discloses a processing equipment for the microwave cooking bag, which is used for processing the microwave cooking bag. Figure 3 The three sides of the bag body 01 of the microwave cooking bag are sealed on the bag, and the position is referred to as a sealing line 03. The sealing line 03 includes a first sealing line 031 located on one side of the buffer bag 02 and a second sealing line 032 located on the other side of the buffer bag 02. The first sealing line 031 is two parallel lines, and the second sealing line 032 is in a U shape as a whole. The three sides of the buffer bag 02 that are not connected to the bag body 01 are sealed and are referred to as a third sealing line 04.

[0064] Referring to Figure 4 The processing equipment for the microwave cooking bag includes a mounting table 1. A feeding device 2, a folding and shaping device 3, a first hot melting device 4, a second hot melting device 5, a third hot melting device 6, a pulling device 7, a punching device 8, and a cutting device 9 are sequentially mounted on the mounting table 1 from one end of the mounting table 1 to the other end of the mounting table 1.

[0065] Referring to Figure 5The feeding device 2 comprises two opposite supports 21 fixed to one end of the mounting table 1 and a mounting roller 22 rotatably connected between the two supports 21. The raw material with the plastic film wound thereon is directly sleeved on the mounting roller 22 in use. Then, the free end of the plastic film on the raw material is pulled to move towards the folding and shaping device 3.

[0066] The folding and shaping device 3 comprises a support rod 31, a horizontal fixing plate 32 fixed to the mounting table 1 through the support rod 31, a shaping plate 33 fixed to the fixing plate 32 vertically, and a fixing member 34 for fixing the position of the plastic film on the shaping plate 33. The shaping plate 33 is fixed to the support rod 31 away from the fixing plate 32. The fixing plate 32 and the mounting table 1 are spaced apart to form a gap for the plastic film to pass through. The fixing member 34 is located on the upper side of the fixing plate 32 and abuts against the shaping plate 33. When the free end of the plastic film reaches the folding and shaping device 3, the plastic film is operated to pass through the gap between the fixing plate 32 and the mounting table 1, and the two sides of the plastic film are folded upwards on the fixing plate 32 and then pass through the gap between the fixing member 34 and the fixing plate 32 and abut against the shaping plate 33, so as to realize the folding of the plastic film. The shaping plate 33 is arranged to form the outline of the bag body 01 and the buffer bag 02 after the plastic film is folded and abuts against the shaping plate 33.

[0067] The fixing member 34 is arranged in two groups, and the two groups of fixing members 34 are located on the two sides of the mounting table 1. The fixing member 34 is arranged in multiple groups to fix the plastic film at multiple positions.

[0068] With reference to Figure 5 The fixing member 34 comprises a guide rail 341 fixed to the mounting table 1, a mounting block 342 slidably connected in the guide rail 341, and an abutting rod 343 hingedly connected to the mounting block 342. The position of the fixing member 34 is adjusted by sliding the mounting block 342 in the guide rail 341. The plastic film is fixed by abutting the abutting rod 343 against the shaping plate 33. The abutting rod 343 is hingedly arranged, so that the plastic film is conveniently placed on the fixing plate 32 and the shaping plate 33 by rotating the abutting rod 343. After the plastic film is placed, the abutting rod 343 is rotated to fix the plastic film. The side of the abutting rod 343 away from the mounting block 342 can be inclined towards the direction of the feeding device 2, so that the plastic film can drive the end of the abutting rod 343 away from the mounting block 342 to move close to the shaping plate 33 with the movement of the plastic film, and the abutting rod 343 will not be separated from the shaping plate 33.

[0069] The folded plastic film will reach the first hot melting device 4, and a third sealing line 04 is processed by the first hot melting device 4 to realize the preliminary fixation of the microwave cooking bag.

[0070] With reference to Figure 5 , the first hot melting device 4 is provided with two groups, and the two groups of first hot melting devices 4 are respectively located on the two sides of the shaping plate 33.

[0071] Among them, the first bracket 11 is fixedly connected on the mounting table 1, and the two groups of first hot melting devices 4 are both mounted on the first bracket 11. The first hot melting device 4 includes a belt conveying assembly 41 mounted on the first bracket 11 and a heating strip 42 fixedly connected on the first bracket 11, and the heating strip 42 is located in the belt conveying assembly 41. Specifically, the belt conveying assembly 41 includes a first pulley 411 rotatably connected on the first bracket 11, a second pulley 412 rotatably connected on the first bracket 11, a transmission belt 413 sleeved on the first pulley 411 and the second pulley 412, and a first motor 414 fixedly connected on the first bracket 11 for driving the first pulley 411 to rotate, and the heating strip 42 is located in the first transmission belt 413. The first transmission belts 413 of the two first hot melting devices 4 form a first heating space 43 for the plastic film to slide in. When the plastic film is transmitted backward from the folding and shaping device 3, the side of the buffer bag 02 away from the bag body 01 is upwardly curved, so it will pass through the first heating space 43, and in the process of passing through, the heat of the heating strip 42 is also transmitted to the buffer bag 02 through the transmission belt 413, so as to heat and melt the side of the buffer bag 02 away from the bag body 01, so that the two layers of buffer bags 02 are bonded together to process the third sealing line 04. The plastic film processed with the third sealing line 04 will be transmitted backward to the second hot melting device 5 again.

[0072] With reference to Figure 5 and Figure 6 , the second hot melting device 5 includes a first hot melting knife 51 slidably connected on the mounting table 1 and a first driving mechanism 52 for driving the first hot melting knife 51 to move in a character shape, wherein the first driving mechanism 52 is mounted on the mounting table 1. The track of the first hot melting knife 51 moving in a character shape is in the same horizontal plane.

[0073] Meanwhile, the mounting table 1 is also provided with a synchronous part 53 capable of moving synchronously with the first hot melting knife 51, and the synchronous part 53 is located on the side of the plastic film away from the first hot melting knife 51, so that the first hot melting knife 51 and the synchronous part 53 form a second heating space 54 for the plastic film to slide in.

[0074] When the plastic film reaches the second heating space 54, the first driving mechanism 52 drives the first hot melting knife 51 to move towards the second heating space 54, so as to clamp the plastic film between the first hot melting knife 51 and the synchronous part 53. With the continuous sliding of the plastic film, the first driving mechanism 52 also drives the first hot melting knife 51 to move along the sliding direction of the plastic film, so as to realize the synchronous movement of the first hot melting knife 51 and the plastic film. At this time, the first hot melting knife 51 and the plastic film are relatively static, so that the plastic film can be heated for a set time, and at the same time, the conveying work of the plastic film does not need to be stopped, so that the hot melting efficiency is improved. When the first hot melting knife 51 moves with the plastic film for a set length, the first driving mechanism 52 drives the first hot melting knife 51 to slide away from the second heating space 54, so as to realize the separation of the first hot melting knife 51 and the plastic film, and then the first driving mechanism 52 drives the first hot melting knife 51 to slide to the side away from the movement direction of the plastic film, so as to slide to the position of the unprocessed third sealing line 04, and finally the first driving mechanism 52 drives the first hot melting knife 51 to move towards the second heating space 54 to abut on the plastic film, and the above process is repeated. The plastic film is heated for a set time without stopping the conveying work of the plastic film, so that the processing efficiency is higher.

[0075] The first hot melting knife 51 comprises a first knife seat 514, a first knife 511 integrally formed in V shape and fixed on the first knife seat 514, a second knife 512 fixed on the first knife seat 514 and located on both sides of the first knife 511, and a connecting knife 513 fixed on the V-shaped opening of the first knife 511. The first knife 511 is used for processing the low-pressure bonding line 022, the second knife 512 located on both sides of the first knife 511 is used for processing the low-pressure sealing line 023, and the connecting knife 513 is used for strengthening the structural strength of the first knife 511 as a whole.

[0076] In order to improve the heating efficiency, a plurality of first hot melting knives 51 can be arranged side by side, and adjacent two first hot melting knives 51 are fixed, so that a plurality of low-pressure sealing lines 023 and low-pressure bonding lines 022 can be processed at the same time.

[0077] Specifically, the first drive mechanism 52 includes a first linear drive member 521 fixed to the mounting platform 1, a first limiting plate 522 fixed to the mounting platform 1, and a first driving rod 523 fixed to the side of the first knife holder 514 away from the first hot melt knife 51. The first driving rod 523 is generally L-shaped, with one end fixed to the first hot melt knife 51 and the other end extending downwards. The first limiting plate 522 is horizontally positioned and has a U-shaped first limiting groove 524. The downward-extending end of the first driving rod 523 is embedded in the first limiting groove 524. A first connecting rod 525 is provided between the movable part of the first linear drive member 521 and the first driving rod 523. The first connecting rod 525 is located on the side of the first limiting plate 522 facing the first hot melt knife 51, and one end of the first connecting rod 525 is rotatably connected to the movable part of the first linear drive member 521, while the other end is rotatably connected to the first driving rod 523. When the first linear drive unit 521 is activated, the first linear drive unit 521 will drive the first driving rod 523 to slide in the first limiting groove 524 through the first connecting rod 525. The first driving rod 523 will also drive the first hot melt knife 51 to slide along the direction of the first limiting groove 524.

[0078] To increase the contact strength of the first hot melt blade 51, two first drive mechanisms 52 can be provided, spaced apart along the length of the first hot melt blade 51. In use, the two first drive mechanisms 52 need to be operated synchronously to increase the contact force of the first hot melt blade 51 and achieve synchronous movement at both ends of the first hot melt blade 51.

[0079] Taking a first limiting groove 524 as an example, the two grooves in the first limiting groove 524 that are aligned with the length direction of the mounting platform 1 are called the first groove 5241, and the other two grooves are called the second groove 5242. The first groove 5241 near the plastic film and the second groove 5242 away from the first hot melt device 4 are connected by an arc, so that when the slider of the first linear motor slides from one end to the other end, the first driving rod 523 can smoothly slide from the first groove 5241 near the plastic film to the second groove 5242 away from the first hot melt device 4, and finally reach the intersection of the second groove 5242 away from the first hot melt device 4 and the first groove 5241 away from the plastic film. A first groove 5241 away from the plastic film and a second groove 5242 near the first hot melt device 4 are connected by an arc, so that when the slider of the first linear motor slides in the opposite direction from one end to the other, the driving rod can smoothly slide from the first groove 5241 away from the plastic film to the second groove 5242 near the first hot melt device 4, and finally drive the second groove 5242 near the first hot melt device 4 to the intersection with the first groove 5241 near the plastic film.

[0080] Meanwhile, the connecting rod can be L-shaped as a whole to reduce the occurrence of jamming.

[0081] Among them, the synchronizing component 53 can be selected as the second hot melt device 5. At this time, there are two symmetrically arranged second hot melt devices 5, which are located on both sides of the mounting platform 1, so that the two second hot melt devices 5 can heat both sides of the plastic film at the same time.

[0082] Of course, the synchronizing component 53 can be a sliding plate that is slidably connected to the mounting platform 1. The sliding direction of the sliding plate is consistent with the length direction of the mounting platform 1. The sliding plate and the first hot melt knife 51 are located on both sides of the mounting platform 1, and are fixedly connected between the sliding plate and the slider of the first linear motor. When the slider of the first linear motor reciprocates, the slider of the first linear motor will also drive the sliding plate to reciprocate through the connecting rod, so as to realize the synchronous movement of the sliding plate and the first hot melt knife 51.

[0083] After the low-pressure sealing line 023 and low-pressure adhesive line 022 are processed by the first hot melt knife 51, the plastic film will continue to move forward and reach the third hot melt device 6, so as to process the first sealing line 031 and the second sealing line 032 by the third hot melt device 6.

[0084] Reference Figure 7 The third hot-melting device 6 includes a second hot-melting blade 61 and a second driving mechanism 62 for driving the second hot-melting blade 61 in a U-shape. The second hot-melting blade 61 includes a third blade 611 for processing the first sealing line 031 and a fourth blade 612 for processing the second sealing line 032. Two second driving mechanisms 62 are provided, located on opposite sides of the mounting platform 1, and connected to the third blade 611 and the fourth blade 612 respectively to drive them in a U-shape. The U-shape movement trajectories of the third blade 611 and the fourth blade 612 are both in the same vertical plane, thus realizing the processing of the first sealing line 031 and the second sealing line 032.

[0085] The third cutter 611 includes a second cutter holder 6112 and two parallel cutter plates 6111 fixed to the second cutter holder 6112. The two cutter plates 6111 are located on the same side of the second cutter holder 6112. The second drive mechanism 62 that drives the third cutter 611 is connected to the second cutter holder 6112. The fourth cutter 612 has a U-shaped cross-section. The second drive mechanism 62 that drives the fourth cutter 612 is connected to the outer wall of the closed U-shaped end of the fourth cutter 612. The two second drive mechanisms 62 have identical structures, differing only in their installation positions. This application uses the second drive mechanism 62 that drives the third cutter 611 as an example for explanation.

[0086] Reference Figure 8The second drive mechanism 62 includes a vertically placed second limiting plate 621 fixed to the mounting platform 1, a second driving rod 622 connected to the second tool holder 6112, and a second linear drive member 623 fixed to the mounting platform 1. The second limiting plate 621 has a U-shaped second limiting groove 624. One end of the second driving rod 622, away from the second tool holder 6112, is embedded in the second limiting groove 624. A second connecting rod 625 is rotatably connected between the movable part of the second linear drive member 623 and the second driving rod 622, with the second connecting rod 625 located on the side of the second limiting plate 621 facing the second tool holder 6112. When the second linear drive member 623 is activated, it drives the second driving rod 622 to slide within the second limiting groove 624 via the second connecting rod 625, with the sliding trajectory conforming to the shape of the second limiting groove 624, thus enabling the second driving rod 622 to drive the third tool 611 in a U-shaped motion.

[0087] In this design, the two grooves in the second limiting groove 624 that are aligned with the length of the mounting platform 1 are called the third groove 6241, and the two vertically formed grooves in the second limiting groove 624 are called the fourth groove 6242. One of the third grooves 6241 closer to the mounting platform 1 and the other of the fourth grooves 6242 farther from the first hot-melt device 4 are connected by an arc, allowing the second driving rod 622 to smoothly slide from the third groove 6241 closer to the mounting platform 1 to the fourth groove 6242 farther from the first hot-melt device 4 when the movable part of the second linear drive member 623 slides from one end to the other. The other third groove 6241 and fourth groove 6242 are connected by an arc, allowing the second driving rod 622 to slide from the other third groove 6241 to the other fourth groove 6242 when the movable part of the second linear drive member 623 slides in the opposite direction.

[0088] Meanwhile, the second connecting rod 625 is also L-shaped to prevent jamming.

[0089] Reference Figure 9 and Figure 10The second driving rod 622 is in sliding connection with the second hot knife 61. The abutting member 63 is arranged between the mounting table 1 and the second knife seat 6112 to drive the third knife 611 to move towards the fourth knife 612, and the reset member 64 is arranged to drive the third knife 611 to slide away from the fourth knife 612 to achieve reset. When the second driving rod 622 drives the third knife 611 to move downward to abut on the plastic film to process the first sealing line 031, the third knife 611 is driven to move close to the fourth knife 612 under the action of the abutting member 63, so that the third knife 611 and the fourth knife 612 clamp the plastic film shaped as part of the buffer bag 02 to further reinforce the two sides of the third sealing line 04. When the processing is completed, the third knife 611 is driven to move away from the fourth knife 612 under the action of the reset member 64 to achieve reset.

[0090] Specifically, the abutting member 63 includes a first wedge block 631 fixed to the second knife seat 6112 away from the third knife 611 and a second wedge block 632 fixed to the mounting table 1. The inclined surface of the first wedge block 631 is located on the lower side and faces the second wedge block 632. The inclined surface of the second wedge block 632 is located on the upper side and faces the first wedge block 631. When the second driving mechanism 62 drives the second knife seat 6112 to move downward, the first wedge block 631 will also move downward until it abuts against the second wedge block 632. With the continuous downward movement of the second knife seat 6112, the second knife seat 6112 will move close to the fourth knife 612 relative to the second driving rod 622 under the action of the inclined surfaces of the first wedge block 631 and the second wedge block 632, until the lower side of the third knife 611 abuts on the bag body 01 of the plastic film. At this time, the side of the third knife 611 away from the second knife seat 6112 also abuts on the buffer bag 02 of the plastic film to reinforce the two sides of the third sealing line 04.

[0091] It can be understood that the second wedge block 632 is located on one side of the second connecting rod 625 and is in a strip shape, so that the second wedge block 632 always abuts against the first wedge block 631 when the second driving mechanism 62 drives the third knife 611 to move with the plastic film.

[0092] Referring to Figure 7Meanwhile, a belt conveyor 65 is also installed on the mounting platform 1. The belt conveyor 65 is located directly below the third blade 611 and the fourth blade 612, so that when the third blade 611 and the fourth blade 612 abut against the plastic film, the plastic film is clamped between the belt conveyor 65 and the third blade 611, and between the belt conveyor 65 and the fourth blade 612. When the plastic film moves forward, the belt conveyor 65 also moves forward, and the two second drive mechanisms 62 also drive the third blade 611 and the fourth blade 612 forward respectively, achieving synchronous forward movement. This avoids friction between the plastic film and the mounting platform 1 when the third blade 611 and the fourth blade 612 move forward against the mounting platform 1, which could damage the plastic film.

[0093] Reference Figure 10 An installation groove 6113 is provided inside the second tool holder 6112 for the second driving rod 622 to be inserted. The end of the second driving rod 622 away from the second limiting plate 621 is slidably embedded in the installation groove 6113. The reset member 64 is located in the installation groove 6113 and includes a baffle 641 fixed to the end of the second driving rod 622 and a reset spring 642 sleeved on the second driving rod 622. One end of the reset spring 642 abuts against the baffle 641, and the other end abuts against the side of the installation groove 6113 facing the second limiting plate 621. This allows the third blade 611 to be reset when the second tool holder 6112 moves upward to separate from the plastic film after the plastic film is processed, driven by the second drive mechanism 62. The first wedge block 631 and the second wedge block 632 also separate. Under the elastic force of the reset spring 642, the third blade 611 can move away from the fourth blade 612 and abut against the second tool holder 6112, thus resetting the third blade 611.

[0094] Reference Figure 4 The pulling device 7 is located on the side of the third hot-melt device 6 away from the second hot-melt device 5. The pulling device 7 includes two parallel drive rollers 71 rotatably connected to the mounting platform 1 and a pulling motor 72 fixed to the mounting platform 1 for driving the two drive rollers 71 to rotate respectively. Both drive rollers 71 are arranged along the width direction of the mounting platform 1, and the plastic film passes between the two drive rollers 71. When the pulling motor 72 is started, the two pulling motors 72 will drive the two drive rollers 71 to rotate in opposite directions, thereby pulling the plastic film located between the two drive rollers 71 away from the third hot-melt device 6. While pulling the plastic film, the cushioning bag 02 and the bag body 01 are also pressed together, achieving preliminary shaping.

[0095] The plastic film that slides between the two drive rollers 71 will reach the punching device 8 to process a pressure relief port 025 into the plastic film.

[0096] Reference Figure 11 and Figure 12The punching device 8 comprises a fixing base 81 fixed on the mounting table 1, a punching cylinder 82 vertically arranged and fixed on the fixing base 81, a drill bit 83 fixed on the piston rod of the punching cylinder 82, and a partition plate 84 fixed on the mounting table 1. The piston rod of the punching cylinder 82 is arranged downward, and the partition plate 84 is in an L shape as a whole, one end of which is fixed on the mounting table 1 and the other end of which is located directly below the punching cylinder 82. The partition plate 84 and the mounting table 1 form an isolation space 85 for the bag body 01 formed by the plastic film to slide into. When the plastic film reaches the punching device 8, the part formed as the bag body 01 is located in the isolation space 85, and the part formed as the buffer bag 02 is located on the upper side of the partition plate 84. When the piston rod of the punching cylinder 82 is extended to drive the drill bit 83 to descend, the drill bit 83 can punch the buffer bag 02 located on the upper side of the partition plate 84 without damaging the bag body 01.

[0097] With reference to Figure 13 , the cross section of the drill bit 83 is in a C shape, so that the punching pressure relief is met, and garbage waste is not generated on the production line.

[0098] The plastic film punched is continuously moved away from the pulling device 7 under the action of the pulling force of the pulling device 7 until reaching the cutting device 9, and is cut into the microwave cooking bags of a set length by the cutting device 9. Of course, a belt conveyor can be arranged on the mounting table directly below the cutting device 9 to realize the conveying of the plastic film after cutting.

[0099] With reference to Figure 11 and Figure 12 , the cutting device 9 comprises a fixing frame 91 fixed on the mounting table 1, a cutting cylinder 92 fixed on the mounting table 1, and a cutting knife 93 fixed on the piston rod of the cutting cylinder 92. When the plastic film reaches directly below the cutting cylinder 92, the piston rod of the cutting cylinder 92 is extended to drive the cutting knife 93 to descend and cut the plastic film, so that the microwave cooking bags are cut out one by one, and the processing work of the microwave cooking bags is completed.

[0100] With reference to FIG. 11, a collecting box 05 is further arranged on the side of the mounting table 1 close to the cutting device 9, and the collecting box 05 is placed on the ground, so that the microwave cooking bags after cutting are collected in the collecting box 05, and the automatic collecting work is completed.

[0101] The implementation principle of the processing equipment of the microwave steaming bag is as follows: in use, the plastic film raw material to be processed is directly sleeved on the installation roller 22, the plastic film is fixed on the shaping plate 33 through the fixing piece 34, and the initial shaping of the microwave steaming bag is realized. The belt conveying assembly 41 can realize the conveying of the plastic film and the heat sealing processing of one side of the buffer bag 02 through the heating strip 42 during the conveying. Then, the first driving mechanism 52 drives the first hot melting knife 51 to abut against the plastic film, so that the low-pressure-bearing sealing line 023 and the low-pressure-bearing bonding line 022 are processed, and the first hot melting knife 51 is conveyed together with the plastic film during the processing. When the set distance is reached, the first driving mechanism 52 drives the first hot melting knife 51 to move away from the plastic film and return to the initial position, and the next section of the plastic film is processed. At the same time, the part of the plastic film on which the low-pressure-bearing sealing line 023 and the low-pressure-bearing bonding line 022 are processed reaches the third hot melting device 6, and the two second driving mechanisms 62 drive the third knife 611 and the fourth knife 612 to process the plastic film. During the processing, the two second driving mechanisms 62 drive the third knife 611 and the fourth knife 612 to move synchronously with the plastic film, so as to heat the plastic film for a set time, and the belt conveyor 65 also moves synchronously with the plastic film. Thus, the first sealing line 031 and the second sealing line 032 of the shaped bag body 01 are processed. After the processing is completed, the pulling device 7 folds the buffer bag 02 on the bag body 01 during the movement of the plastic film, and the initial shaping of the microwave steaming bag is realized. Then, the punching device 8 punches the buffer bag 02, and the cutting device 9 cuts the long plastic film into individual microwave steaming bags according to the set length. The cut microwave steaming bags are pushed by the uncut plastic film and fall from the installation table 1 to the collection box 05, and the microwave steaming bags are collected.

[0102] It can be understood that when the first hot melting knife 51 or the second hot melting knife 61 is used to heat and melt the plastic film, heating wires can be arranged in the first knife 511, the second knife 512, the third knife 611 and the fourth knife 612 to heat the first knife 511, the second knife 512, the third knife 611 and the fourth knife 612. Of course, heating rods can also be installed in the first knife 511 seat and the second knife 512 seat. When the first knife 511 and the second knife 512 are installed on the first knife 511 seat, the heat in the first knife 511 seat is transferred to the first knife 511 and the second knife 512. When the third knife 611 is installed on the second knife 512 seat, the heat in the second knife 512 seat is transferred to the third knife 611, so as to meet the heat melting needs of the plastic film. This is prior art, and will not be described in detail.

[0103] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A processing device for processing a microwave retort bag, the microwave retort bag comprising a bag body (01) and a buffer bag (02) fixed on one side of the bag body (01), the bag body (01) internally forming a placement space (011) for placing food, the buffer bag (02) internally forming a buffer space (021) in communication with the placement space (011), the buffer bag (02) internally forming a pressure relief space (024) located on the side of the buffer space (021) away from the placement space (011), the buffer bag (02) being provided with a pressure relief opening (025), the pressure relief space (024) being in communication with the outside through the pressure relief opening (025), and a low-pressure adhesive line (022) being arranged between the buffer space (021) and the pressure relief space (024); the buffer bag (02) being provided with a low-pressure sealing line (023), the low-pressure sealing line (023) being located on the side of the buffer space (021) away from the placement space (011), the low-pressure sealing line (023) being located on both sides of the pressure relief opening (025) and connected with the low-pressure adhesive line (022); the low-pressure sealing line (023) being arc-shaped on the side close to the buffer space (021), and the distance between the low-pressure sealing line (023) and the placement space (011) gradually decreasing from the side away from the pressure relief opening (025) to the side close to the pressure relief opening (025); characterized in that the processing device comprising a mounting table (1), the mounting table (1) being sequentially provided with, from one end to the other end: a material placing device (2) for placing raw materials; a folding and shaping device (3) mounted on the mounting table (1) and used for folding the two sides of a plastic film on the raw materials inward to form the bag body (01) and the buffer bag (02); a first hot melting device (4) used for bonding one end of the buffer bag (02) away from the bag body (01); a second hot melting device (5) used for processing the low-pressure sealing line (023) and the low-pressure adhesive line (022). A third hot melting device (6) is arranged on the installation table (1) and used for hot melting the bag body (01) on the side; the third hot melting device (6) comprises a second hot melting knife (61) and a second driving mechanism (62) used for driving the second hot melting knife (61) to move in a Chinese character shape, the second hot melting knife (61) comprises a third knife (611) and a fourth knife (612), the third knife (611) and the fourth knife (612) are respectively used for processing the parts of the bag body (01) located on the two sides of the buffer bag (02), the second driving mechanism (62) is provided with two, and the two second driving mechanisms (62) are respectively used for driving the third knife (611) and the fourth knife (612) to move in a Chinese character shape; the track of the Chinese character shape movement of the third knife (611) is in the same vertical plane, the track of the Chinese character shape movement of the fourth knife (612) is in the same vertical plane, and the third knife (611) and the fourth knife (612) form a third heating space for the plastic film to slide through; the second driving mechanism (62) comprises a second limiting plate (621) fixed on one side of the installation table (1), a second linear driving element (623) fixed on the installation table (1) and located on one side of the second limiting plate (621), and a second driving rod (622) installed on the second hot melting knife (61), a second limiting groove (624) in a Chinese character shape is formed in the second limiting plate (621), one end of the second driving rod (622) away from the second hot melting knife (61) is embedded in the second limiting groove (624), and a second connecting rod (625) is connected between the moving part of the second linear driving element (623) and the second driving rod (622), one end of the second connecting rod (625) is rotationally connected with the moving part of the second linear driving element (623), and the other end of the second connecting rod (625) is rotationally connected with the second driving rod (622); A pulling device (7) is arranged on the installation table (1) and used for pulling the plastic film to pull the plastic film out of the feeding device (2); A punching device (8) is arranged on the installation table (1) and used for processing the pressure relief port (025); A cutting device (9) is arranged on the installation table (1) and used for cutting the plastic film to cut the plastic film into bag bodies (01) with consistent lengths.

2. The microwave retort bag processing apparatus according to claim 1, wherein The folding and shaping device (3) comprises a fixing plate (32) fixed on the installation table (1), a shaping plate (33) fixed on the fixing plate (32), and a fixing element (34) used for fixing the position of the plastic film on the shaping plate (33), and the lower side of the fixing plate (32) is provided with a gap for the plastic film to be put in, and the fixing element (34) and the shaping plate (33) are provided with a gap for the plastic film to pass through.

3. The microwave retort bag processing apparatus according to claim 2, wherein The first support (11) is fixedly connected to the mounting table (1), the first hot melting device (4) is provided with two first hot melting devices (4) which are both mounted on the first support (11), and the two first hot melting devices (4) are located on the two sides of the shaping plate (33) respectively, the first hot melting device (4) comprises a belt conveying assembly (41) mounted on the first support (11) and a heating strip (42) fixedly connected to the first support (11), the heating strip (42) is located in the belt conveying assembly (41), and a first heating space (43) for sliding of the plastic film is formed between the two first hot melting devices (4).

4. The microwave retort bag processing apparatus according to claim 1, wherein The second hot melting device (5) comprises a first hot melting knife (51) slidably connected to the mounting table (1) and a first driving mechanism (52) for driving the first hot melting knife (51) to move in a character shape, and the movement track of the first hot melting knife (51) is in the same horizontal plane; the mounting table (1) is further provided with a synchronous part (53) capable of moving synchronously with the first hot melting knife (51), the synchronous part (53) is located on the side of the plastic film away from the first hot melting knife (51), and a second heating space (54) for sliding of the plastic film is formed between the synchronous part (53) and the first hot melting knife (51).

5. The microwave retort bag processing apparatus according to claim 4, wherein The second driving rod (622) is slidably connected with the second hot melting knife (61), and the second hot melting knife (61) and the second driving rod (622) are provided with an abutting part (63) for driving the second hot melting knife (61) to move towards the third heating space and a reset part (64) for driving the second hot melting knife (61) to move away from the third heating space, when the second hot melting knife (61) moves towards the bag body (01) during the character-shaped movement of the second hot melting knife (61) driven by the second driving mechanism (62), the second hot melting knife (61) moves towards the third heating space to abut against the buffer bag (02) under the action of the abutting part (63); when the second hot melting knife (61) moves away from the bag body (01), the second hot melting knife (61) moves away from the third heating space under the limitation of the reset part (64).

Images