M-bag heat sealing device and heat sealing method

Abstract

The application discloses a kind of M bag heat sealing device and heat sealing method, relating to M bag heat sealing packaging technical field, including moving and transplanting component, receiving belt, vacuumizing component and heat sealing component;The moving and transplanting component is moved to the receiving belt with the posture of being opened to M bag;Vacuumizing component includes first lifting cylinder, first finger cylinder, lifting support and long strip vacuum suction nozzle, and first finger cylinder drives first shaping plate and second shaping plate to be close to each other or away from each other;Heat sealing component includes first telescopic cylinder, first heat sealing component, second telescopic cylinder and second heat sealing component, and first heat sealing strip and third heat sealing strip are paired to form first heat sealing, and second heat sealing strip and fourth heat sealing strip are paired to form second heat sealing;Technical effect: M bag loaded with material is vacuumized and forms first heat sealing and second heat sealing, and waste material is cut, realizes that high-efficiency vacuumizing and heat sealing are realized in same station, and structure is compact.

Description

Technical Field

[0001] This invention relates to the field of M-bag heat-sealing packaging technology, and in particular to an M-bag heat-sealing device and heat-sealing method. Background Technology

[0002] M-bags are bags with M-shaped cross-sections on both sides of the bag body. After the M-bag is loaded with materials, how to quickly seal it and maintain the vacuum inside to improve production efficiency is a technical challenge that needs to be overcome.

[0003] Therefore, it is necessary to develop an M-bag heat-sealing device and heat-sealing method. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the purpose of this invention is to disclose an M-bag heat-sealing device and heat-sealing method.

[0005] The first objective of this invention is to provide a heat-sealing device for M-bags.

[0006] The second objective of this invention is to provide a heat-sealing method for M-bags.

[0007] To achieve the first objective mentioned above, the present invention provides an M-bag heat sealing device, including a transfer assembly, a receiving belt, a vacuum assembly, and a heat sealing assembly; The transfer assembly transfers bag M to the receiving conveyor belt in an open position; The vacuum assembly includes a first lifting cylinder, a first finger-gripping cylinder, a lifting bracket, and a long strip-shaped vacuum suction nozzle. The first lifting cylinder drives the lifting bracket to move up and down. The first finger-gripping cylinder is installed on the lifting bracket. The vacuum suction nozzle is installed on the lifting bracket. The first finger-gripping cylinder drives the first shaping plate and the second shaping plate to move closer to or further away from each other. The vacuum suction nozzle is located between the first shaping plate and the second shaping plate, and all three are on the same vertical plane. The heat sealing assembly includes a first telescopic cylinder, a first heat sealing component, a second telescopic cylinder, and a second heat sealing component. The first telescopic cylinder drives the first heat sealing component to move, and the second telescopic cylinder drives the second heat sealing component to move. The first heat sealing component includes a first heat sealing strip, a second heat sealing strip, and a first foam cotton sealing strip. The first foam cotton sealing strip protrudes beyond the first and second heat sealing strips. The second heat sealing component includes a third heat sealing strip, a fourth heat sealing strip, and a second foam cotton sealing strip. The second foam cotton sealing strip protrudes beyond the third and fourth heat sealing strips. The first and third heat sealing strips are paired to form a first heat seal, and the second and fourth heat sealing strips are paired to form a second heat seal. A gap is provided between the first heat-sealing strip and the second heat-sealing strip, and the first foam cotton sealing strip is disposed below the second heat-sealing strip; A gap is provided between the third heat-sealing strip and the fourth heat-sealing strip, and the second foam cotton sealing strip is disposed below the fourth heat-sealing strip.

[0008] Preferably, the lifting bracket is U-shaped, and the lifting bracket includes a first vertical plate, a horizontal plate and a second vertical plate, the first finger-clamping cylinder is installed on the first vertical plate and the vacuum suction nozzle is installed on the second vertical plate.

[0009] Preferably, the first heat-sealing strip and the second heat-sealing strip are supported by a first foam pad, and the third heat-sealing strip and the fourth heat-sealing strip are supported by a second foam pad.

[0010] Preferably, the transfer assembly includes a mobile module and a first mobile plate and a second mobile plate driven by the mobile module; A first bracket, a first cylinder, a first suction cup, a first mounting plate, a second cylinder, and a first vertical clamping plate are provided below the first movable plate; A second bracket, a third cylinder, a second suction cup, a second mounting plate, a fourth cylinder, and a second vertical clamping plate are provided below the second movable plate; The first cylinder drives the first suction cup to extend and retract, and the third cylinder drives the second suction cup to extend and retract, with the first suction cups moving closer to or further away from the second suction cup; The second cylinder drives the first vertical clamping plate to extend and retract, and the fourth cylinder drives the second vertical clamping plate to extend and retract, with the first vertical clamping plates moving closer to or further away from each other than the second vertical clamping plate.

[0011] Preferably, the moving module includes a linear module, an L-shaped connecting plate, and a transverse connecting plate; The straight module is connected to the vertical part of the L-shaped connecting plate, the horizontal part of the L-shaped connecting plate is connected to the first moving plate, and the two ends of the transverse connecting plate are respectively connected to the first moving plate and the second moving plate.

[0012] Preferably, the distance between the first heat seal and the second heat seal is 10mm-15mm.

[0013] Preferably, a first adsorption component and a second adsorption component are respectively provided on both sides of the vacuuming component; The first adsorption component includes a first telescopic module and a third suction cup, and the second adsorption component includes a second telescopic module and a fourth suction cup; The third and fourth suction cups adsorb both sides of the opening of the M bag.

[0014] Preferably, a movable cutter is provided on the top of the first heat-sealing assembly; A blade groove that cooperates with the movable cutter is provided on the top of the second heat-sealing assembly.

[0015] Preferably, a second finger-clamping cylinder is provided below the transverse connecting plate.

[0016] Based on the same inventive principle, to solve the second inventive problem mentioned above, the present invention provides a heat-sealing method for M-bags, employing the M-bag heat-sealing device described in the first invention, comprising the following steps: The transfer assembly transfers the M bag to the receiving belt, and the receiving belt supports the M bag. The third and fourth suction cups adhere to both sides of the opening of the M bag, so that the M bag is in an open state. The first lifting cylinder drives the vacuum suction nozzle to insert into the open M bag, and the first shaping plate and the second shaping plate are respectively located at the fold lines on both sides of the open M bag. The first finger-clamping cylinder drives the first shaping plate and the second shaping plate to move closer to each other and fold the M bag; The first telescopic cylinder drives the first heat-sealing assembly to contact one side of the M bag, and the second telescopic cylinder drives the second heat-sealing assembly to contact the other side of the M bag. The vacuum suction nozzle is clamped between the first foam cotton seal and the second foam cotton seal. The vacuum suction nozzle is activated to draw a vacuum and draws the M bag to a predetermined vacuum level. The first lifting cylinder drives the vacuum suction nozzle to rise and remove the M bag. The first heat-sealing assembly and the second heat-sealing assembly are activated to form a first heat seal and a second heat seal on both sides of the M bag.

[0017] Compared with the prior art, the technical effects of the present invention are as follows: The purpose of this invention is to vacuum the M-bag containing materials and form a first heat seal and a second heat seal, and to cut off waste materials, so that the material inside the M-bag is in a certain vacuum environment, achieving efficient vacuuming and heat sealing in the same station, with a compact structure. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1(a) is a schematic cross-sectional view of bag M.

[0020] Figure 1(b) is a cross-sectional schematic diagram of bag M being adsorbed to the open state.

[0021] Figure 2 This is a schematic diagram of the M-bag of the present invention.

[0022] Figure 3 This is a three-dimensional structural diagram of the M-bag heat-sealing device of the present invention.

[0023] Figure 4 This is a three-dimensional structural diagram of the transfer component of the present invention.

[0024] Figure 5 This is a three-dimensional structural diagram of the transfer component of the present invention.

[0025] Figure 6 This is a three-dimensional structural diagram of the transfer component of the present invention.

[0026] Figure 7 This is the present invention. Figure 6 A magnified structural diagram at point B.

[0027] Figure 8 This is a three-dimensional structural diagram of the vacuuming component and heat sealing component of the present invention.

[0028] Figure 9 This is a three-dimensional structural diagram of the vacuuming component and heat sealing component of the present invention.

[0029] Figure 10 This is the present invention. Figure 9 A magnified structural diagram at point C.

[0030] Figure 11 This is the present invention. Figure 3 An enlarged structural diagram of point A.

[0031] Figure 12 This is a schematic flowchart of the M-bag heat sealing method of the present invention.

[0032] Among them, 1. Transfer assembly; 11. Moving module; 111. Linear module; 112. L-shaped connecting plate; 1121. Vertical part; 1122. Horizontal part; 113. Horizontal connecting plate; 114. Second finger-clamping cylinder; 12. First moving plate; 121. First bracket; 122. First cylinder; 123. First suction cup; 124. First mounting plate; 125. Second cylinder; 126. First vertical clamping plate; 13. 1. Second moving plate; 131. Second bracket; 132. Third cylinder; 133. Second suction cup; 134. Second mounting plate; 135. Fourth cylinder; 136. Second vertical clamping plate; 2. Receiving belt; 3. Vacuum assembly; 31. First lifting cylinder; 32. First finger clamping cylinder; 33. Lifting bracket; 331. First vertical plate; 332. Horizontal plate; 333. Second vertical plate; 34. Vacuum suction nozzle; 35. First shaping plate; 36. Second shaping plate; 37. First suction assembly; 371. First telescopic module; 372. Third suction cup; 38. Second suction assembly; 381. Second telescopic module; 382. Fourth suction cup; 4. Heat sealing assembly; 41. First telescopic cylinder; 42. First heat sealing assembly; 421. First heat sealing strip; 422. Second heat sealing strip; 423. First foam sealing strip; 424. First foam 43. Second telescopic cylinder; 44. Second heat sealing assembly; 441. Third heat sealing strip; 442. Fourth heat sealing strip; 443. Second foam cotton sealing strip; 444. Second foam cotton pad; 445. Knife groove; 45. Moving cutter; 451. Pointed blade; 5. M bag; 51. First heat seal; 52. Second heat seal; 53. Bag opening; 54. Bag body; 55. Waste material; 56. Fold crease; 6. Motor; 7. Belt. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent changes or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. Example 1

[0035] See Figure 1 to Figure 10 As shown in the figure, this embodiment discloses a specific implementation of an M-bag heat sealing device (hereinafter referred to as "heat sealing device").

[0036] M-bag heat sealing device, see Figure 1 to 20 Figure 10As shown, the assembly includes a transfer component 1, a receiving belt 2, a vacuuming component 3, and a heat-sealing component 4. The transfer component 1 transfers the M-bag 5 to the receiving belt 2 in an open position. The vacuuming component 3 includes a first lifting cylinder 31, a first gripping cylinder 32, a lifting bracket 33, and a long vacuum suction nozzle 34. The first lifting cylinder 31 drives the lifting bracket 33 to rise and fall. The first gripping cylinder 32 is installed on the lifting bracket 33. The vacuum suction nozzle 34 is installed on the lifting bracket 33. The first gripping cylinder 32 drives the first shaping plate 35 and the second shaping plate 36 to move closer together. Whether near or far, the vacuum suction nozzle 34 is located between the first shaping plate 35 and the second shaping plate 36, and all three are on the same vertical plane; the heat sealing assembly 4 includes a first telescopic cylinder 41, a first heat sealing assembly 42, a second telescopic cylinder 43, and a second heat sealing assembly 44. The first telescopic cylinder 41 drives the first heat sealing assembly 42 to move, and the second telescopic cylinder 43 drives the second heat sealing assembly 44 to move. The first heat sealing assembly 42 includes a first heat sealing strip 421, a second heat sealing strip 422, and a first foam cotton sealing strip 423. The first foam cotton sealing strip 423 is larger than the first heat sealing strip 421. The sealing strip 421 and the second heat-sealing strip 422 protrude. The second heat-sealing assembly 44 includes a third heat-sealing strip 441, a fourth heat-sealing strip 442, and a second foam sealing strip 443. The second foam sealing strip 443 protrudes beyond the third heat-sealing strip 441 and the fourth heat-sealing strip 442. The first heat-sealing strip 421 and the third heat-sealing strip 441 are paired to form a first heat seal 51, and the second heat-sealing strip 422 and the fourth heat-sealing strip 442 are paired to form a second heat seal 52. The first heat-sealing strip 421 and the second heat-sealing strip 422 are supported by a first foam pad 424. The heat-sealing strip 441 and the fourth heat-sealing strip 442 are supported by the second foam pad 444. The presence of the first foam pad 424 and the second foam pad 444 avoids hard contact during the heat sealing process, allowing the first heat seal 51 and the second heat seal 52 to be achieved in a buffered environment. A gap is provided between the first heat-sealing strip 421 and the second heat-sealing strip 422, and the first foam pad sealing strip 423 is located below the second heat-sealing strip 422. A gap is also provided between the third heat-sealing strip 441 and the fourth heat-sealing strip 442, and the second foam pad sealing strip 443 is located below the fourth heat-sealing strip 442. The first lead screw 46 drives the first heat-sealing assembly 42 to move up and down along the first vertical track 47, and the second lead screw 48 drives the second heat-sealing assembly 44 to move up and down along the second vertical track 49. The motor 6 drives the first lead screw 46 and the second lead screw 48 to rotate synchronously through the belt 7, so that the first heat-sealing assembly 42 and the second heat-sealing assembly 44 move up and down synchronously to adjust the position of the first heat seal 51 and the second heat seal 52.

[0037] Specifically, referring to Figure 1, specifically Figure 1(a), the cross-sections of both sides of bag M5 are M-shaped, with two layers in the middle and four layers on both sides; Figure 1(b) is a schematic diagram of bag M5 carrying materials and in an open state; see... Figure 2 The purpose of this embodiment is to evacuate bag M5 and form a first heat seal 51 and a second heat seal 52. The distance between the first heat seal 51 and the second heat seal 52 is 10mm-15mm. After heat sealing, and along... Figure 2 The dotted line L is used to cut waste material.

[0038] See Figure 3 , Figure 8 and Figure 9 The lifting bracket 33 is U-shaped and includes a first vertical plate 331, a horizontal plate 332, and a second vertical plate 333. The first finger-clamping cylinder 32 is installed on the first vertical plate 331, and the vacuum suction nozzle 34 is installed on the second vertical plate 333. The vacuum suction nozzle 34 is located between the first shaping plate 35 and the second shaping plate 36, and all three are on the same vertical plane. When the first finger-clamping cylinder 32 drives the first shaping plate 35 and the second shaping plate 36 to move closer to each other, it closes the opening of the M bag.

[0039] See Figures 3 to 7The working principle of the transfer assembly 1 is as follows: The transfer assembly 1 includes a moving module 11 and a first moving plate 12 and a second moving plate 13 driven by the moving module 11; a first support 121, a first cylinder 122, a first suction cup 123, a first mounting plate 124, a second cylinder 125, and a first vertical clamping plate 126 are arranged below the first moving plate 12; a second support 131, a third cylinder 132, a second suction cup 133, a second mounting plate 134, a fourth cylinder 135, and a second vertical clamping plate 136 are arranged below the second moving plate 13; the first cylinder 122 drives the first suction cup 123 to extend and retract, the third cylinder 132 drives the second suction cup 133 to extend and retract, and the first suction cup... The first vertical clamping plate 126 moves closer to or further away from the second suction cup 133; the second cylinder 125 drives the first vertical clamping plate 126 to extend and retract, and the fourth cylinder 135 drives the second vertical clamping plate 136 to extend and retract, and the first vertical clamping plate 126 moves closer to or further away from the second vertical clamping plate 136; the moving module 11 includes a linear module 111, an L-shaped connecting plate 112, and a horizontal connecting plate 113; the linear module 111 is connected to the vertical part 1121 of the L-shaped connecting plate 112, the horizontal part 1122 of the L-shaped connecting plate 112 is connected to the first moving plate 12, and the two ends of the horizontal connecting plate 113 are respectively connected to the first moving plate 12 and the second moving plate 133, and the first moving plate 12 and the second moving plate 133... Two movable plates 13 are connected as a whole by a horizontal connecting plate 113. A second finger-gripping cylinder 114 is arranged below the horizontal connecting plate 113. The M bag 5 includes a bag opening 53 and a bag body 54. The first suction cup 123 and the second suction cup 133 respectively adsorb the outer sides of the bag opening 53 of the M bag. The first vertical clamping plate 126 and the second vertical clamping plate 136 respectively clamp the two sides of the bag body 54 of the M bag. The height of the first vertical clamping plate 126 and the second vertical clamping plate 136 is slightly less than the height of the bag body 54 of the M bag, so that the first vertical clamping plate 126 and the second vertical clamping plate 136 can clamp almost the entire height range of the bag body 54. The specific working principle is as follows: the first cylinder 122 is installed on the inner side of the first bracket 121, and the third cylinder 132 is installed on the inner side of the second bracket 131; the first mounting plate 124 is installed below the first bracket 121, and the second mounting plate 134 is installed below the second bracket 131; a third slide rail 1241 is installed below the first mounting plate 124, and a fourth slide rail 1341 is installed below the second mounting plate 134; the second cylinder 125 drives the first vertical clamping plate 126 to move along the third slide rail 1241; the fourth cylinder 135 drives the second vertical clamping plate 136 to move along the fourth slide rail 1341; the M bag 5 contains materials, such as several stacked material trays;With bag M5 clamped (by the first vertical clamping plate 126 and the second vertical clamping plate 136) and its opening suctioned (by the first suction cup 123 and the second suction cup 133 respectively suctioning the outer sides of the bag opening 53), the moving module 11 drives the first moving plate 12 and the second moving plate 13 to move synchronously, transferring bag M5 to the receiving belt 2.

[0040] See Figure 3 and Figure 11 A first adsorption component 37 and a second adsorption component 38 are respectively arranged on both sides of the vacuum assembly 3. The first adsorption component 37 includes a first telescopic module 371 and a third suction cup 372, and the second adsorption component 38 includes a second telescopic module 381 and a fourth suction cup 382. The third suction cup 372 and the fourth suction cup 382 adsorb both sides of the opening 53 of the M bag 5. The third suction cup 372 and the first suction cup 123 are staggered in the height direction, and the fourth suction cup 382 and the second suction cup 133 are staggered in the height direction. When the M bag 5 is transferred to the receiving belt 2, the third suction cup 372 and the fourth suction cup 382 adsorb both sides of the opening 53 of the M bag 5, and the first suction cup 123 and the second suction cup 133 retract, so that the M bag 5 always remains open.

[0041] See Figure 8 along Figure 2 The working principle of the dotted line L for cutting waste is as follows: A movable cutter 45 is set on the top of the first heat-sealing assembly 42. The movable cutter 45 slides back and forth along the top of the first heat-sealing assembly 42. The movable cutter 45 has two sharp blades 451. Both sharp blades 451 can cut the waste 55 during the back-and-forth sliding process to ensure that the waste 55 is completely removed. A blade groove 445 that cooperates with the movable cutter 45 is set on the top of the second heat-sealing assembly 44. When the waste 55 is cut off, the first suction cup 123 and the second suction cup 133 have returned to their original positions, and the second finger-clamping cylinder 114 below the transverse connecting plate 113 clamps the waste 55.

[0042] The working process of the M-bag heat-sealing device in this embodiment is as follows: In the first step, the transfer assembly 1 transfers the M bag 5 to the receiving belt 2, and the receiving belt 2 supports the M bag 5. Specifically, the first suction cup 123 and the second suction cup 133 are disposed at one end of the first moving plate 12 and the second moving plate 13, while the transverse connecting plate 113 and the second finger-clamping cylinder 114 are disposed at the other end of the first moving plate 12 and the second moving plate 13. The M bag 5 in the open state is transferred to the receiving belt 2 by the first moving plate 12 and the second moving plate 13.

[0043] In the second step, the third suction cup 372 and the fourth suction cup 382 adsorb both sides of the opening 53 of the M bag 5. During this process, the third suction cup 372 and the fourth suction cup 382 first approach each other and then move away from each other, so that the M bag 5 is in an open state. After the third suction cup 372 and the fourth suction cup 382 adsorb the opening 53, the first moving plate 12 and the second moving plate 13 drive the first suction cup 123 and the second suction cup 133 to return to their original positions. The open state of the M bag 5 is achieved by the third suction cup 372 and the fourth suction cup 382.

[0044] Third step, the first lifting cylinder 31 drives the vacuum suction nozzle 34 to be inserted into the open M bag. The vacuum suction nozzle 34 is a flat and narrow rectangle. The first shaping plate 35 and the second shaping plate 36 are respectively located at the fold lines 56 on both sides of the open M bag 5 to prepare for folding the bag.

[0045] In the fourth step, the first finger-clamping cylinder 32 drives the first shaping plate 35 and the second shaping plate 36 to move closer to each other and fold the M bag 5. After folding, the third suction cup 372 and the fourth suction cup 382 return to their original positions.

[0046] In the fifth step, the first telescopic cylinder 41 drives the first heat-sealing assembly 42 to contact one side of the M bag 5, and the second telescopic cylinder 43 drives the second heat-sealing assembly 44 to contact the other side of the M bag 5. The vacuum suction nozzle 34 is sandwiched between the first foam cotton seal 423 and the second foam cotton seal 443. In order to press the vacuum suction nozzle 34 firmly, the first foam cotton seal 423 and the second foam cotton seal 443 will deform.

[0047] Step 6: The vacuum suction nozzle 34 starts to draw a vacuum and draws the M bag 5 to a predetermined vacuum level, such as 30%-70%. The vacuum suction nozzle 34 is driven to rise and pull the M bag 5 away by the first lifting cylinder 31. During the extraction process, the first foam cotton seal 423 and the second foam cotton seal 443 will always press the bag opening 53 tightly.

[0048] Step 7: Activate the first heat-sealing assembly 42 and the second heat-sealing assembly 44 to form a first heat seal and a second heat seal on both sides of the M bag. Specifically, the first heat-sealing strip 421 and the third heat-sealing strip 441 are simultaneously heated to a predetermined temperature to form the first heat seal 51; the second heat-sealing strip 422 and the fourth heat-sealing strip 442 are simultaneously heated to a predetermined temperature to form the second heat seal 52, achieving a double heat seal, which can effectively prevent air leakage.

[0049] Step 8: The second finger-clamping cylinder 114 below the transverse connecting plate 113 clamps the waste material 55, and the moving cutter 45 slides along the top of the first heat-sealing assembly 42 and along... Figure 2 The dotted line L completes the cutting of waste materials. Example 2

[0050] Refer to Figure 12 , this embodiment discloses a specific embodiment of a heat sealing method for M-shaped bags.

[0051] The heat sealing method for M-shaped bags, refer to Figure 12 , adopts the M-shaped bag heat sealing device described in Embodiment 1, and comprises the following steps: Step S1: The transfer assembly 1 transfers the M-shaped bag 5 to the material receiving belt 2, and the material receiving belt 2 supports the M-shaped bag 5; specifically, the first suction cup 123 and the second suction cup 133 are arranged at one end of the first moving plate 12 and the second moving plate 13, while the transverse connecting plate 113 and the second finger clamping cylinder 114 are arranged at the other end of the first moving plate 12 and the second moving plate 13. The M-shaped bag 5 in an open state is transferred to the material receiving belt 2 by the first moving plate 12 and the second moving plate 13; Step S2: The third suction cup 372 and the fourth suction cup 382 adsorb both sides of the bag opening 53 of the M-shaped bag 5. In this process, the third suction cup 372 and the fourth suction cup 382 approach each other first and then move away from each other, so that the M-shaped bag 5 is kept in an open state; after the third suction cup 372 and the fourth suction cup 382 finish adsorbing the bag opening 53, the first moving plate 12 and the second moving plate 13 drive the first suction cup 123 and the second suction cup 133 to reset, and the open state of the M-shaped bag 5 is maintained by the third suction cup 372 and the fourth suction cup 382; Step S3: The first lifting cylinder 31 drives the vacuum adsorption nozzle 34 to insert into the M-shaped bag in an open state. The vacuum adsorption nozzle 34 is a flat and narrow rectangle. The first shaping plate 35 and the second shaping plate 36 are respectively located at the folding marks 56 on both sides of the M-shaped bag 5 in the open state, and preparations for folding the bag are made; Step S4: The first finger clamping cylinder 32 respectively drives the first shaping plate 35 and the second shaping plate 36 to approach each other and fold the M-shaped bag 5, and after folding, the third suction cup 372 and the fourth suction cup 382 reset; Step S5: The first telescopic cylinder 41 drives the first heat sealing assembly 42 to contact one side of the M-shaped bag 5, the second telescopic cylinder 43 drives the second heat sealing assembly 44 to contact the other side of the M-shaped bag 5, and the vacuum adsorption nozzle 34 is clamped between the first foam cotton sealing strip 423 and the second foam cotton sealing strip 443. To press the vacuum adsorption nozzle 34 firmly, the first foam cotton sealing strip 423 and the second foam cotton sealing strip 443 deform; Step S6: The vacuum adsorption nozzle 34 starts vacuuming to pump the air inside the M-shaped bag 5 to a predetermined vacuum degree, such as a vacuum degree of 30%-70%. The first lifting cylinder 31 drives the vacuum adsorption nozzle 34 to rise and withdraw from the M-shaped bag 5. During the withdrawal process, the first foam cotton sealing strip 423 and the second foam cotton sealing strip 443 always press the bag opening 53; Step S7: Activate the first heat-sealing assembly 42 and the second heat-sealing assembly 44 to form a first heat seal and a second heat seal on both sides of the M bag. Specifically, the first heat-sealing strip 421 and the third heat-sealing strip 441 are simultaneously heated to a predetermined temperature to form the first heat seal 51; the second heat-sealing strip 422 and the fourth heat-sealing strip 442 are simultaneously heated to a predetermined temperature to form the second heat seal 52, achieving a double heat seal, which can effectively prevent air leakage. Step S8: The second finger-clamping cylinder 114 below the transverse connecting plate 113 clamps the waste material 55, and the moving cutter 45 slides along the top of the first heat-sealing assembly 42 and along... Figure 2 The dotted line L completes the cutting of waste materials.

[0052] The parts in Example 2 are the same as those in Example 1. Please refer to Example 1 for details, which will not be repeated here.

Claims

1. An M-bag heat-sealing device, characterized in that, The device includes a transfer assembly, a receiving belt, a vacuum assembly, and a heat sealing assembly. The transfer assembly includes a moving module and a first moving plate and a second moving plate driven by the moving module. The moving module includes a linear module, an L-shaped connecting plate, and a transverse connecting plate. The two ends of the transverse connecting plate are respectively connected to the first moving plate and the second moving plate. A second finger-clamping cylinder is provided below the transverse connecting plate. The transfer assembly transfers bag M to the receiving conveyor belt in an open position; The vacuum assembly includes a first lifting cylinder, a first finger-gripping cylinder, a lifting bracket, and a long strip-shaped vacuum suction nozzle. The first lifting cylinder drives the lifting bracket to move up and down. The first finger-gripping cylinder is installed on the lifting bracket. The vacuum suction nozzle is installed on the lifting bracket. The first finger-gripping cylinder drives the first shaping plate and the second shaping plate to move closer to or further away from each other. The vacuum suction nozzle is located between the first shaping plate and the second shaping plate, and all three are on the same vertical plane. The heat sealing assembly includes a first telescopic cylinder, a first heat sealing component, a second telescopic cylinder, and a second heat sealing component. The first telescopic cylinder drives the first heat sealing component to move, and the second telescopic cylinder drives the second heat sealing component to move. The first heat sealing component includes a first heat sealing strip, a second heat sealing strip, and a first foam cotton sealing strip. The first foam cotton sealing strip protrudes beyond the first and second heat sealing strips. The second heat sealing component includes a third heat sealing strip, a fourth heat sealing strip, and a second foam cotton sealing strip. The second foam cotton sealing strip protrudes beyond the third and fourth heat sealing strips. The first and third heat sealing strips are paired to form a first heat seal, and the second and fourth heat sealing strips are paired to form a second heat seal. A gap is provided between the first heat-sealing strip and the second heat-sealing strip, and the first foam cotton sealing strip is disposed below the second heat-sealing strip; A gap is provided between the third heat-sealing strip and the fourth heat-sealing strip, and the second foam cotton sealing strip is disposed below the fourth heat-sealing strip; A movable cutter is provided on the top of the first heat sealing assembly, and a blade groove that cooperates with the movable cutter is provided on the top of the second heat sealing assembly; The second clamping cylinder is used to clamp the waste material, and the moving cutter slides along the top of the first heat-sealing assembly to cut off the waste material; The distance between the first heat seal and the second heat seal is 10mm-15mm.

2. The M-bag heat-sealing device as described in claim 1, characterized in that, The lifting bracket is U-shaped and includes a first vertical plate, a horizontal plate, and a second vertical plate. The first finger-clamping cylinder is installed on the first vertical plate, and the vacuum suction nozzle is installed on the second vertical plate.

3. The M-bag heat-sealing device as described in claim 1, characterized in that, The first and second heat-sealing strips are supported by a first foam pad, and the third and fourth heat-sealing strips are supported by a second foam pad.

4. The M-bag heat-sealing device as described in claim 1, characterized in that, A first bracket, a first cylinder, a first suction cup, a first mounting plate, a second cylinder, and a first vertical clamping plate are provided below the first movable plate; A second bracket, a third cylinder, a second suction cup, a second mounting plate, a fourth cylinder, and a second vertical clamping plate are provided below the second movable plate; The first cylinder drives the first suction cup to extend and retract, and the third cylinder drives the second suction cup to extend and retract, with the first suction cups moving closer to or further away from the second suction cup; The second cylinder drives the first vertical clamping plate to extend and retract, and the fourth cylinder drives the second vertical clamping plate to extend and retract, with the first vertical clamping plates moving closer to or further away from each other than the second vertical clamping plate.

5. The M-bag heat-sealing device as described in claim 4, characterized in that, The linear module is connected to the vertical part of the L-shaped connecting plate, and the horizontal part of the L-shaped connecting plate is connected to the first moving plate.

6. The M-bag heat-sealing device according to any one of claims 1-5, characterized in that, A first adsorption component and a second adsorption component are respectively provided on both sides of the vacuuming component; The first adsorption component includes a first telescopic module and a third suction cup, and the second adsorption component includes a second telescopic module and a fourth suction cup; The third and fourth suction cups adsorb both sides of the opening of the M bag.

7. A heat-sealing method for M-bags, characterized in that, The M-bag heat-sealing device according to claim 6 includes the following steps: The transfer assembly transfers the M bag to the receiving belt, and the receiving belt supports the M bag. The third and fourth suction cups adhere to both sides of the opening of the M bag, so that the M bag is in an open state. The first lifting cylinder drives the vacuum suction nozzle to insert into the open M bag, and the first shaping plate and the second shaping plate are respectively located at the fold lines on both sides of the open M bag. The first finger-clamping cylinder drives the first shaping plate and the second shaping plate to move closer to each other and fold the M bag; The first telescopic cylinder drives the first heat-sealing assembly to contact one side of the M bag, and the second telescopic cylinder drives the second heat-sealing assembly to contact the other side of the M bag. The vacuum suction nozzle is clamped between the first foam cotton seal and the second foam cotton seal. The vacuum suction nozzle is activated to draw a vacuum and draws the M bag to a predetermined vacuum level. The first lifting cylinder drives the vacuum suction nozzle to rise and remove the M bag. The first heat-sealing assembly and the second heat-sealing assembly are activated to form a first heat seal and a second heat seal on both sides of the M bag.

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