Hot melt adhesive sheet forming machine

Abstract

The invention discloses a hot melt adhesive sheet forming machine, and belongs to the technical field of coil manufacturing. The hot melt adhesive sheet forming machine comprises a supporting frame and a connecting frame installed on the outer wall of the supporting frame, a driving assembly used for driving a lower mold to move is arranged on the outer wall of the supporting frame, and an adhesive injection assembly used for injecting materials into the lower mold is arranged on the outer wall of the connecting frame. A cooling assembly used for cooling the film is arranged on the outer wall of the connecting frame. Through sequential alternation of the three groups of lower molds, an assembly line type processing mode integrating glue injection, cooling and demolding during processing of the hot melt adhesive sheet is realized, and the processing efficiency of the hot melt adhesive sheet is greatly improved; bubbles generated during hot melt adhesive sheet processing in the adhesive melting direction and the adhesive injection direction can be reduced, meanwhile, residual cooling liquid in the cooling groove is recycled before adhesive injection, and the situation that the surface of the hot melt adhesive sheet is uneven due to too fast solidification of the hot melt adhesive is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hot melt film manufacturing, and particularly to a hot melt film forming machine. Background Art

[0002] Hot melt adhesive is a plastic adhesive that realizes physical state transformation (solid state ↔ liquid state) through temperature change, and has the characteristics of non-toxic, environmental protection, fast bonding speed, etc. As one of its forms, hot melt film has high film strength, weather resistance and waterproof performance, and is suitable for composite bonding of materials such as plastics, wood, and metals, and adapts to the precision processing requirements of automotive parts, electronic components, etc.

[0003] In Chinese Patent CN118386522A announced on July 26, 2024, a hot melt film forming machine and forming process are disclosed. After the film is hot-pressed and formed, a rapid pre-cooling device is used to cool one side of the hot melt film located on the upper conveyor belt. Due to different cooling sequences, the hot melt film will separate from the conveyor belts on both sides and no longer adhere, thereby reducing the defective rate caused thereby. However, in the hot melt film forming machine and forming process, when the film is hot-pressed and formed, air easily enters the interior of the hot melt adhesive and forms bubbles, thereby reducing the product quality after the film is formed and making it still inconvenient to use. Summary of the Invention

[0004] The purpose of the present invention is to provide a hot melt film forming machine to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A hot melt film forming machine includes a support frame and a connecting frame installed on the outer wall of the support frame. A driving component for driving the lower mold to move is arranged on the outer wall of the support frame. The driving component includes a connecting shaft installed on the outer wall of the support frame and auxiliary gears symmetrically distributed along the central axis of the support frame. A chain is rotatably connected to the outer wall of the auxiliary gear. A fixing block is fixedly connected to the outer wall of the chain. A support shaft adapted to the lower mold is arranged on the outer wall of the fixing block. A connecting shaft is rotatably connected to the outer wall of the support frame. A transmission gear adapted to the chain is arranged on the outer wall of the connecting shaft. A motor adapted to the connecting shaft is arranged on the outer wall of the support frame. The lower mold includes a lower mold one, a lower mold two, and a lower mold three. A glue injection component for injecting material into the lower mold is arranged on the outer wall of the connecting frame. A cooling component for cooling the film is arranged on the outer wall of the connecting frame.

[0006] Further, the driving component further includes a limiting column and a demolding mechanism installed on the outer wall of the fixing block. A guiding groove adapted to the support shaft is arranged on the outer wall of the support frame. A limiting groove adapted to the limiting column is arranged on the outer wall of the support frame.

[0007] Further, the demolding mechanism includes a connecting plate disposed on the inner wall of the lower mold and a top plate mounted on the outer wall of the support frame. Push rods are equidistantly distributed on the outer wall of the top of the connecting plate. A pressing spring adapted to the connecting plate is arranged on the inner wall of the lower mold. A limiting block is fixedly connected to the outer wall of the connecting plate. A pushing plate adapted to the top plate is arranged on the outer wall of the bottom of the connecting plate.

[0008] Further, the glue injection assembly includes a glue melting chamber installed on the outer wall of the connecting frame for heating hot melt adhesive particles, and a vacuum pump mounted on the outer wall of the top of the glue melting chamber. A suction pipe adapted to the glue melting chamber is arranged on the outer wall of one end of the vacuum pump. A second telescopic tube adapted to the suction pipe is arranged on the inner wall of the glue melting chamber. A top rod is fixedly connected to the center position of the inner wall of the glue melting chamber where the second telescopic tube is located. A threaded rod is rotatably connected to the inner wall of the glue melting chamber. An extrusion plate is threadedly connected to the outer wall of the threaded rod. A through hole adapted to the second telescopic tube is arranged on the outer wall of the extrusion plate. A connecting column is slidably connected to the inner wall of the extrusion plate. A limiting plate adapted to the through hole is arranged on the outer wall of one end of the connecting column. A first limiting spring adapted to the connecting column is arranged on the inner wall of the extrusion plate.

[0009] Further, the limiting plate is slidably connected to the extrusion plate through the connecting column, and multiple groups of the limiting plates are arranged on the surface of the connecting column.

[0010] Further, the glue injection assembly further includes a first telescopic tube and an air extraction mechanism installed on the outer wall of the bottom of the glue melting chamber. The bottom outer wall of the first telescopic tube is fixedly connected to the upper mold. An electric valve is installed between the first telescopic tube and the upper mold. A cylinder is fixedly connected to the inner wall of the connecting frame. A connecting block is fixedly connected to the outer wall of the bottom of the cylinder. A chute adapted to the connecting block is arranged on the outer wall of the upper mold. An empty chamber is opened on the inner wall of the connecting frame. A second limiting spring is fixedly connected to the inner wall of the empty chamber. A piston plate adapted to the empty chamber is arranged on the outer wall of one end of the second limiting spring. A connecting rod adapted to the connecting block is arranged on the outer wall of the piston plate. A pull rope is fixedly connected to the outer wall of the top of the piston plate. The pull rope includes a spring rope and a nylon rope. A rotating sleeve is rotatably connected to the inner wall of the glue melting chamber. A hairspring adapted to the rotating sleeve is arranged on the inner wall of the glue melting chamber. A ratchet adapted to the nylon rope is arranged on the outer wall of one end of the rotating sleeve. A ratchet pawl adapted to the ratchet is arranged on the outer wall of the threaded rod. A spring piece adapted to the ratchet pawl is arranged on the outer wall of the threaded rod.

[0011] Further, the air extraction mechanism includes an electric three-way valve installed on the outer wall of the suction pipe and a through groove opened on the inner wall of the upper mold. A rubber pad is adhesively bonded to the outer wall of the top end of the lower mold. One end of the outer wall of the electric three-way valve is provided with a vacuum hose adapted to the through groove. A flow guide plate is fixedly connected to the inner wall of the bottom end of the upper mold, and a plurality of V-shaped flow dividing plates adapted to the through groove are arranged on the outer wall of the flow guide plate.

[0012] Further, the cooling assembly includes a liquid storage tank and a recovery mechanism installed on the outer wall of the support frame for storing coolant. A water pump adapted to the liquid storage tank is arranged on the outer wall of the support frame. A water outlet pipe is installed on the outer wall of the water pump. A water outlet telescopic pipe adapted to the water outlet pipe is arranged on the inner wall of the support frame. A water outlet joint is installed on one end of the outer wall of the water outlet telescopic pipe. A water outlet spring adapted to the water outlet joint is arranged on the inner wall of the support frame. A cooling groove is opened on the inner wall of the lower mold. The cooling groove includes a liquid inlet, a cooling channel, and a liquid outlet. A drainage telescopic pipe is installed on the inner wall of the support frame. An auxiliary drainage joint adapted to the liquid outlet is arranged on one end of the outer wall of the drainage telescopic pipe. An inlet pipe adapted to the liquid storage tank is arranged on one end of the outer wall of the drainage telescopic pipe. A drainage spring adapted to the drainage joint is arranged on the inner wall of the support frame. A first connecting spring is fixedly connected to the inner wall of the liquid inlet. A first sealing plate adapted to the water outlet joint is arranged on one end of the outer wall of the first connecting spring. A plurality of first notches are equally spaced along the circumferential direction on the outer edge of the first sealing plate. A second connecting spring is fixedly connected to the inner wall of the liquid outlet. A second sealing plate adapted to the drainage joint is arranged on one end of the outer wall of the second connecting spring. A plurality of second notches are equally spaced along the circumferential direction on the outer edge of the second sealing plate.

[0013] Further, the recovery mechanism includes an auxiliary inlet pipe arranged on the outer wall of the inlet pipe and an exhaust pipe installed on the inner wall of the connecting frame and adapted to the empty bin. An auxiliary drainage telescopic pipe adapted to the auxiliary inlet pipe is arranged on the inner wall of the support frame. An auxiliary drainage joint adapted to the liquid outlet is arranged on one end of the outer wall of the auxiliary drainage telescopic pipe. An auxiliary drainage spring adapted to the auxiliary drainage joint is arranged on the inner wall of the support frame. An exhaust telescopic pipe is fixedly connected to one end of the outer wall of the exhaust pipe. An exhaust joint adapted to the liquid inlet is arranged on one end of the outer wall of the exhaust telescopic pipe. An exhaust spring adapted to the exhaust joint is arranged on the inner wall of the connecting frame.

[0014] Different from the prior art, the beneficial effects of the present application are as follows: The hot-melt film forming machine realizes an integrated pipeline processing mode of glue injection, cooling, and demolding during the processing of hot-melt films through the sequential alternation of three groups of lower molds, greatly improving the processing efficiency of hot-melt films. Through the two vacuum pumping operations on the melting glue tank and the gel space, it is possible to reduce the occurrence of bubbles during the processing of hot-melt films in both the melting glue and glue injection directions. At the same time, the residual coolant in the cooling tank is recovered before glue injection, reducing the uneven surface of the hot-melt film caused by the too-fast solidification of the hot-melt glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the external structure of the present invention; Figure 2 It is a schematic side view structure diagram of the support frame of the present invention; Figure 3 It is a schematic diagram of the structure of the auxiliary gear and the chain of the present invention cooperating with each other; Figure 4 It is a schematic diagram of the structure of the fixing block and the support shaft of the present invention cooperating with each other; Figure 5 It is a schematic diagram of the structure of the fixing block and the limiting column of the present invention cooperating with each other; Figure 6 It is a schematic diagram of the structure of the guiding groove and the limiting groove of the present invention cooperating with each other; Figure 7 It is a schematic diagram of the structure of the melting glue tank and the first telescopic pipe of the present invention cooperating with each other; Figure 8 It is a schematic diagram of the structure of the threaded rod and the extrusion plate of the present invention cooperating with each other; Figure 9 It is a schematic diagram of the structure of the diversion plate and the V-shaped diversion plate of the present invention cooperating with each other; Figure 10 It is a schematic diagram of the structure of the rotating sleeve and the ratchet of the present invention cooperating with each other; Figure 11 It is a schematic diagram of the structure of the ratchet and the pawl of the present invention cooperating with each other; Figure 12 It is a schematic diagram of the structure of the water outlet pipe and the water inlet pipe of the present invention cooperating with each other; Figure 13 It is a schematic diagram of the structure of the cooling tank of the present invention; Figure 14 It is a schematic diagram of the structure of the first sealing plate and the first notch of the present invention cooperating with each other; Figure 15 It is a schematic diagram of the structure of the second sealing plate and the second notch of the present invention cooperating with each other; Figure 16 It is a schematic diagram of the structure of the connecting plate and the push rod of the present invention cooperating with each other; Figure 17Schematic diagram of the cooperating structure of the connecting plate and the pushing plate of the present invention; Figure 18 For the present invention Figure 8 Enlarged schematic diagram of part A in the present invention; Figure 19 For the present invention Figure 8 Enlarged schematic diagram of part B in the present invention; Figure 20 For the present invention Figure 8 Enlarged schematic diagram of part C in the present invention; Figure 21 For the present invention Figure 8 Enlarged schematic diagram of part D in the present invention; Figure 22 For the present invention Figure 12 Enlarged schematic diagram of part E in the present invention; Figure 23 For the present invention Figure 12 Enlarged schematic diagram of part F in the present invention; Figure 24 For the present invention Figure 12 Enlarged schematic diagram of part G in the present invention; Figure 25 For the present invention Figure 8 Enlarged schematic diagram of part H in the present invention.

[0016] In the figure: 1. Support frame; 2. Auxiliary gear; 3. Chain; 4. Fixed block; 5. Support shaft; 6. Limit post; 7. Guide groove; 8. Limit groove; 9. Lower mold; 901. First lower mold; 902. Second lower mold; 903. Third lower mold; 10. Rubber pad; 11. Connecting frame; 12. Connecting shaft; 13. Driving gear; 14. Motor; 15. Melting glue bin; 16. First telescopic tube; 17. Upper mold; 18. Electric valve; 19. Cylinder; 20. Connecting block; 21. Chute; 22. Vacuum pump; 23. Suction pipe; 24. Electric three-way valve; 25. Vacuum hose; 26. Second telescopic tube; 27. Ejector rod; 28. Threaded rod; 29. Extrusion plate; 30. Through hole; 31. Connecting column; 32. Limit plate; 33. First limit spring; 34. Through slot; 35. Deflector plate; 36. V-shaped flow splitter; 37. Empty bin; 38. Second limit spring; 39. Piston plate; 40. Connecting rod; 41. Pulling rope; 411. Spring rope; 412. Nylon rope; 42. Rotating sleeve; 43. Spring; 44. Ratchet; 45. Pawl; 46. Spring piece; 47. Liquid storage tank; 48. Water pump; 49. Water outlet pipe; 50. Water outlet telescopic tube; 51. Water outlet joint; 52. Water outlet spring; 53. Cooling tank; 531. Liquid inlet; 532. Cooling channel; 533. Liquid outlet; 54. Drainage telescopic tube; 55. Drainage joint; 56. Water inlet pipe; 57. Drainage spring; 58. Auxiliary water inlet pipe; 59. Auxiliary drainage telescopic tube; 60. Auxiliary drainage joint; 61. Auxiliary drainage spring; 62. Exhaust pipe; 63. Exhaust telescopic tube; 64. Exhaust joint; 65. Exhaust spring; 66. First connecting spring; 67. First sealing plate; 68. First notch; 69. Second connecting spring; 70. Second sealing plate; 71. Second notch; 72. Connecting plate; 73. Push rod; 74. Pressing spring; 75. Limit block; 76. Push plate; 77. Top plate. Detailed implementation manners

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The following will detail the present invention with reference to the drawings and in combination with the embodiments.

[0019] Embodiment 1 Please refer to Figures 1 - 25, the present invention provides a technical solution: a hot melt film forming machine, including a support frame 1 and a connecting frame 11 installed on the outer wall of the support frame 1. A driving component for driving the lower mold 9 to move is arranged on the outer wall of the support frame 1. The driving component includes a connecting shaft 12 installed on the outer wall of the support frame 1 and auxiliary gears 2 symmetrically distributed along the central axis of the support frame 1. A chain 3 is rotatably connected to the outer wall of the auxiliary gear 2. A fixing block 4 is fixedly connected to the outer wall of the chain 3. A support shaft 5 adapted to the lower mold 9 is arranged on the outer wall of the fixing block 4. A connecting shaft 12 is rotatably connected to the outer wall of the support frame 1. A transmission gear 13 adapted to the chain 3 is arranged on the outer wall of the connecting shaft 12. A motor 14 adapted to the connecting shaft 12 is arranged on the outer wall of the support frame 1; the lower mold 9 includes a lower mold one 901, a lower mold two 902 and a lower mold three 903. A glue injection component for injecting material into the lower mold 9 is arranged on the outer wall of the connecting frame 11. A cooling component for cooling the film is arranged on the outer wall of the connecting frame 11.

[0020] During use, connect the external power supply to start the motor 14, drive the transmission gear 13 to rotate through the connecting shaft 12, and drive the chain 3 to move on the surface of multiple groups of auxiliary gears 2 through the meshing between the transmission gear 13 and the chain 3. During this process, the chain 3 pushes the three groups of lower molds 9 to move along the outer wall of the support frame 1 through the fixing block 4 and the support shaft 5. For the specific working process, please refer to Figure 6 : The lower mold one 901, the lower mold two 902 and the lower mold three 903 are respectively at Figure 6 points a, b, and c in. First, inject liquid hot melt glue into the interior of the lower mold one 901 through the glue injection component, so that it evenly fills the surface of the lower mold one 901. Then start the motor 14 to drive the lower mold 9 to move through the chain 3, so that the lower mold one 901 moves to point b, and at this time the lower mold two 902 will move to point c and the lower mold three 903 will move to point a. Then the glue injection component injects liquid hot melt glue into the interior of the lower mold three 903, and the cooling component will cool the liquid hot melt glue in the lower mold one 901 and solidify it into a sheet. Then the motor 14 drives the lower mold 9 to move through the chain 3 again, so that the lower mold one 901 moves to point c, and the lower mold two 902 will move to point a and the lower mold three 903 will move to point b. When the lower mold one 901 moves to point c, the formed hot melt film is ejected from the surface of the lower mold one 901 through the demolding mechanism to realize automatic blanking. At the same time, the glue injection component injects liquid hot melt glue into the interior of the lower mold two 902, and the cooling component will cool the liquid hot melt glue in the lower mold three 903 and solidify it into a sheet. Through the sequential alternation of the three groups of lower molds 9, a pipeline processing mode that integrates glue injection, cooling, and demolding during the processing of the hot melt film is realized.

[0021] Please refer to Figure 3 、 Figure 4 andFigure 6 The driving assembly further includes a limiting post 6 and a demolding mechanism mounted on the outer wall of the fixed block 4. A guiding groove 7 adapted to the support shaft 5 is provided on the outer wall of the support frame 1, and a limiting groove 8 adapted to the limiting post 6 is provided on the outer wall of the support frame 1.

[0022] During use, when the motor 14 drives the support shaft 5 to move through the chain 3 and the fixed block 4, one end of the support shaft 5 will slide inside the guiding groove 7, so that the force exerted by the lower mold 9 on the surface of the chain 3 through the support shaft 5 is mostly transmitted to the surface of the guiding groove 7 through the support shaft 5, thus playing a supporting role for the lower mold 9. At the same time, when the lower mold 9 moves from point b to point c, through the cooperation of the guiding groove 7 and the chain 3, the lower mold 9 will be driven to flip, providing favorable conditions for subsequent demolding. And through the sliding connection between the limiting post 6 and the limiting groove 8, it can support the lower mold 9 when it flips, so that the lower mold 9 will not rotate during movement, but can only move and flip along the surface of the guiding groove 7.

[0023] Please refer to Figure 2 、 Figure 16 and Figure 17 The demolding mechanism includes a connecting plate 72 provided on the inner wall of the lower mold 9, and a top plate 77 mounted on the outer wall of the support frame 1. Push rods 73 are evenly distributed on the top outer wall of the connecting plate 72. A pressing spring 74 adapted to the connecting plate 72 is provided on the inner wall of the lower mold 9. A limiting block 75 is fixedly connected to the outer wall of the connecting plate 72, and a push plate 76 adapted to the top plate 77 is provided on the bottom outer wall of the connecting plate 72.

[0024] During use, after the lower mold 9 flips downward, the motor 14 continues to drive the lower mold 9 to move. When the lower mold 9 moves below the top plate 77, as the lower mold 9 continues to move, the top plate 77 will press the surface of the push plate 76, thereby pushing the connecting plate 72 to slide inside the lower mold 9 and compress the pressing spring 74. When the connecting plate 72 slides, it will push the push rod 73 out of the surface of the lower mold 9, so that the push rod 73 will push the hot melt film out of the surface of the lower mold 9. After the top plate 77 is separated from the push plate 76, the pressing spring 74 is under force and pushes the connecting plate 72 to reset, so that the push rod 73 is pulled back into the lower mold 9. After the upper mold 17 closes the lower mold 9, the upper mold 17 will press the surface of the limiting block 75, thereby limiting the connecting plate 72 to prevent the connecting plate 72 from sliding upward under the action of suction when the vacuum pump 22 evacuates the gel space formed by the closing of the upper mold 17 and the lower mold 9.

[0025] Please refer to Figure 7 、 Figure 8 and Figure 19, the glue injection assembly includes a melting glue bin 15 installed on the outer wall of the connecting frame 11 for heating hot melt glue particles, and a vacuum pump 22 installed on the outer wall of the top of the melting glue bin 15. One end of the outer wall of the vacuum pump 22 is provided with a suction pipe 23 adapted to the melting glue bin 15. A second telescopic pipe 26 adapted to the suction pipe 23 is arranged on the inner wall of the melting glue bin 15. A push rod 27 is fixedly connected to the inner wall of the melting glue bin 15 at the central position of the second telescopic pipe 26. A threaded rod 28 is rotatably connected to the inner wall of the melting glue bin 15. An extrusion plate 29 is threadedly connected to the outer wall of the threaded rod 28. A through hole 30 adapted to the second telescopic pipe 26 is arranged on the outer wall of the extrusion plate 29. A connecting column 31 is slidably connected to the inner wall of the extrusion plate 29. A limiting plate 32 adapted to the through hole 30 is arranged on one end of the outer wall of the connecting column 31. A first limiting spring 33 adapted to the connecting column 31 is arranged on the inner wall of the extrusion plate 29.

[0026] During use, start the vacuum pump 22 to pump air into the interior of the melting glue bin 15 through the suction pipe 23. At this time, the air inside the melting glue bin 15 below the extrusion plate 29 passes through the through hole 30 and enters the interior of the second telescopic pipe 26, and finally enters the suction pipe 23 and is discharged. When the air in the space below the extrusion plate 29 inside the melting glue bin 15 is completely discharged, the air pressure in the space above the extrusion plate 29 is in a normal state at this time. And due to the second telescopic pipe 26 covering the through hole 30, when evacuating the space below the extrusion plate 29, the air in the space above the extrusion plate 29 will not pass through the through hole 30 and enter the bottom of the melting glue bin 15. Then rotate the threaded rod 28 to convert the rotational motion between the extrusion plate 29 and the threaded rod 28 into a linear motion of the extrusion plate 29 inside the melting glue bin 15, thereby pushing the extrusion plate 29 to move downward. During this process, the through hole 30 will move downward along the outer periphery of the push rod 27, causing the through hole 30 to slide out of the surface of the push rod 27. At this time, the first limiting spring 33 is pushed by the force to drive the connecting column 31 to slide into the interior of the extrusion plate 29, thereby pushing the limiting plate 32 to close the through hole 30. Then start heating the hot melt glue particles inside the melting glue bin 15 to melt them, preventing air from entering the interior of the hot melt glue and forming bubbles when the hot melt glue changes from a solid state to a liquid state.

[0027] Please refer to Figure 7 、 Figure 8 、 Figure 10 、 Figure 11 、 Figure 18 、 Figure 20 and Figure 21, the glue injection assembly further includes a first telescopic tube 16 and an air extraction mechanism installed on the outer wall of the bottom end of the melting glue bin 15. A top mold 17 is fixedly connected to the outer wall of the bottom end of the first telescopic tube 16. An electric valve 18 is installed between the first telescopic tube 16 and the top mold 17. A cylinder 19 is fixedly connected to the inner wall of the connecting frame 11. A connecting block 20 is fixedly connected to the outer wall of the bottom end of the cylinder 19. A sliding groove 21 adapted to the connecting block 20 is provided on the outer wall of the top mold 17. An empty bin 37 is formed on the inner wall of the connecting frame 11. A second limiting spring 38 is fixedly connected to the inner wall of the empty bin 37. A piston plate 39 adapted to the empty bin 37 is provided on the outer wall of one end of the second limiting spring 38. A connecting rod 40 adapted to the connecting block 20 is provided on the outer wall of the piston plate 39. A pulling rope 41 is fixedly connected to the outer wall of the top of the piston plate 39. The pulling rope 41 includes a spring rope 411 and a nylon rope 412. A rotating sleeve 42 is rotatably connected to the inner wall of the melting glue bin 15. A winding spring 43 adapted to the rotating sleeve 42 is provided on the inner wall of the melting glue bin 15. A ratchet 44 adapted to the nylon rope 412 is provided on the outer wall of one end of the rotating sleeve 42. A pawl 45 adapted to the ratchet 44 is provided on the outer wall of the threaded rod 28. A spring piece 46 adapted to the pawl 45 is provided on the outer wall of the threaded rod 28.

[0028] During use, the cylinder 19 is used to push the connecting block 20 to move downward along the inner wall of the connecting frame 11. At this time, the upper mold 17 moves downward toward the surface of the lower mold 9 under the action of force and stretches the first telescopic tube 16. The connecting block 20 will pull the piston plate 39 to slide downward inside the empty chamber 37 through the connecting rod 40, and stretch the second limiting spring 38. When the piston plate 39 slides downward inside the empty chamber 37, it will first pull the spring rope 411, causing the spring rope 411 to deform, changing from a spiral state to a straight state. After the upper mold 17 and the lower mold 9 are closed, at this time, the spring rope 411 has completely changed from a spiral state to a straight state. Then, the electric valve 18 is opened to release the limit on the first telescopic tube 16. Then, the cylinder 19 pushes the connecting block 20 downward again, causing the connecting block 20 to slide downward along the surface of the chute 21. During this process, the piston plate 39 will pull the nylon rope 412 through the spring rope 411, causing the nylon rope 412 to pull the ratchet 44 and the rotating sleeve 42 to rotate on the inner wall of the glue melting chamber 15, and apply a torsional force to the winding spring 43. When the ratchet 44 rotates, through the engagement between the ratchet 44 and the pawl 45, the threaded rod 28 is pushed to rotate. By the rotation of the threaded rod 28, the extrusion plate 29 is pushed to descend and extrude the liquid hot melt glue inside the glue melting chamber 15, so as to extrude it into the gel space formed after the upper mold 17 and the lower mold 9 are closed. When the injection is completed, the cylinder 19 pulls the connecting block 20 and the upper mold 17 to reset. At this time, the second limiting spring 38 pulls the piston plate 39 to reset under the action of force, and the spring rope 411 also returns to the spiral state again. At the same time, the winding spring 43 pushes the rotating sleeve 42 and the ratchet 44 to rotate and rewind the nylon rope 412. During this process, the ratchet 44 will push the pawl 45 to rotate on the threaded rod 28 and squeeze the spring piece 46. When the ratchet 44 stops rotating, the spring piece 46 pushes the pawl 45 to re-engage with the ratchet 44 under the action of force.

[0029] Please refer to Figure 7 、 Figure 8 and Figure 19 As shown in FIGS.

[0030] During use, when the upper mold 17 and the lower mold 9 are closed to form a gel space, the upper mold 17 and the lower mold 9 will squeeze the rubber pad 10 to ensure the tightness of the gel space. Then, the electric three-way valve 24 is opened, and the vacuum pump 22 evacuates the inside of the gel space through the vacuum hose 25. The air inside the gel space enters the vacuum hose 25 through the through groove 34 and is discharged. After the injection of glue is completed, the vacuum pump 22 is started to inflate the inside of the gel space. When the air enters the inside of the gel space from the through groove 34, it will first enter the gap between the flow guide plate 35 and the upper mold 17, and the air is shunted by multiple groups of V-shaped shunt plates 36, which can reduce the impact force of the air entering the gel space and prevent the air from directly blowing onto the surface of the hot melt film, so as to avoid wrinkles on the surface of the incompletely solidified melt film. When the air pressure inside the gel space rises to the normal state, the upper mold 17 and the lower mold 9 can be separated.

[0031] Please refer to Figure 1 、 Figure 12 、 Figure 13 、 Figure 14 、 Figure 15 、 Figure 22 and Figure 23 ., the cooling assembly includes a liquid storage tank 47 installed on the outer wall of the support frame 1 for storing coolant and a recovery mechanism. A water pump 48 adapted to the liquid storage tank 47 is provided on the outer wall of the support frame 1. A water outlet pipe 49 is installed on the outer wall of the water pump 48. A water outlet telescopic pipe 50 adapted to the water outlet pipe 49 is provided on the inner wall of the support frame 1. A water outlet joint 51 is installed on the outer wall of one end of the water outlet telescopic pipe 50. A water outlet spring 52 adapted to the water outlet joint 51 is provided on the inner wall of the support frame 1. A cooling groove 53 is formed on the inner wall of the lower mold 9. The cooling groove 53 includes a liquid inlet 531, a cooling channel 532, and a liquid outlet 533. A drainage telescopic pipe 54 is installed on the inner wall of the support frame 1. A drainage joint 55 adapted to the liquid outlet 533 is provided on the outer wall of one end of the drainage telescopic pipe 54. An inlet water pipe 56 adapted to the liquid storage tank 47 is provided on the outer wall of one end of the drainage telescopic pipe 54. A drainage spring 57 adapted to the drainage joint 55 is provided on the inner wall of the support frame 1. A first connecting spring 66 is fixedly connected to the inner wall of the liquid inlet 531. A first blocking plate 67 adapted to the water outlet joint 51 is provided on the outer wall of one end of the first connecting spring 66. First notches 68 are equally distributed along the circumferential direction on the outer edge of the first blocking plate 67. A second connecting spring 69 is fixedly connected to the inner wall of the liquid outlet 533. A second blocking plate 70 adapted to the drainage joint 55 is provided on the outer wall of one end of the second connecting spring 69. Second notches 71 are equally distributed along the circumferential direction on the outer edge of the second blocking plate 70.

[0032] During use, when the lower mold 9 moves from point a to point b, the lower mold 9 will squeeze the surfaces of the water outlet joint 51 and the drain joint 55. Under the action of the force, the water outlet joint 51 and the drain joint 55 will slide inwardly of the support frame 1 and squeeze the water outlet spring 52 and the drain spring 57. When the lower mold 9 moves to point b, the water outlet spring 52 pushes the water outlet telescopic tube 50 to extend outwardly under the action of the force, thereby pushing one end of the water outlet joint 51 into the inside of the liquid inlet 531, causing the water outlet joint 51 to push the first sealing plate 67 to slide into the inside of the liquid inlet 531 and squeeze the first connecting spring 66, thereby releasing the limit on the first notch 68. At the same time, the drain spring 57 pushes the drain telescopic tube 54 to extend outwardly under the action of the force, thereby pushing one end of the drain joint 55 into the inside of the liquid outlet 533, causing the drain joint 55 to push the second sealing plate 70 to slide into the inside of the liquid outlet 533 and squeeze the second connecting spring 69, thereby releasing the limit on the second notch 71. At this time, the water pump 48 is started to pump the coolant inside the liquid storage tank 47 through the water outlet pipe 49 into the inside of the water outlet telescopic tube 50, and through the water outlet joint 51, it passes through the first notch 68 and is injected into the inside of the cooling channel 532, and cools the hot melt film. After the coolant enters the cooling channel 532, it will pass through the second notch 71 and enter the inside of the drain joint 55 from the liquid outlet 533, and then enter the water inlet pipe 56 through the drain telescopic tube 54 and then flow into the inside of the liquid storage tank 47. After the cooling is completed, after the water pump 48 is turned off, the lower mold 9 moves to point c. At this time, the water outlet joint 51 and the drain joint 55 will slide out of the inside of the liquid inlet 531 and the liquid outlet 533. At this time, the first connecting spring 66 pushes the first sealing plate 67 to reset and re-limit the first notch 68, and at the same time, the second connecting spring 69 pushes the second sealing plate 70 to reset and re-limit the second notch 71.

[0033] Please refer to Figure 8 , Figure 23 , Figure 24 and Figure 25 , the recycling mechanism includes an auxiliary water inlet pipe 58 provided on the outer wall of the water inlet pipe 56, and an exhaust pipe 62 installed on the inner wall of the connecting frame 11 and adapted to the empty bin 37. An auxiliary drain telescopic tube 59 adapted to the auxiliary water inlet pipe 58 is provided on the inner wall of the support frame 1. An auxiliary drain joint 60 adapted to the liquid outlet 533 is provided on the outer wall of one end of the auxiliary drain telescopic tube 59. An auxiliary drain spring 61 adapted to the auxiliary drain joint 60 is provided on the inner wall of the support frame 1. An exhaust telescopic tube 63 is fixedly connected to the outer wall of one end of the exhaust pipe 62. An exhaust joint 64 adapted to the liquid inlet 531 is provided on the outer wall of one end of the exhaust telescopic tube 63. An exhaust spring 65 adapted to the exhaust joint 64 is provided on the inner wall of the connecting frame 11.

[0034] In use, when the lower die 9 moves from point c to point a, the lower die 9 will extrude the surfaces of the auxiliary drainage joint 60 and the exhaust joint 64. Under the action of the force, the auxiliary drainage joint 60 and the exhaust joint 64 will slide inward and squeeze the auxiliary drainage spring 61 and the exhaust spring 65. When the lower die 9 moves to point a, the auxiliary drainage spring 61 acts on the force to push the auxiliary drainage telescopic tube 59 to extend outward, so as to push one end of the auxiliary drainage joint 60 into the interior of the liquid outlet 533, causing the auxiliary drainage joint 60 to push the second sealing plate 70 to slide into the interior of the liquid outlet 533 and squeeze the second connecting spring 69, thereby releasing the limit on the second notch 71. At the same time, the exhaust spring 65 acts on the force to push the exhaust telescopic tube 63 to extend outward, so as to push one end of the exhaust joint 64 into the interior of the liquid inlet 531, causing the exhaust joint 64 to push the first sealing plate 67 to slide into the interior of the liquid inlet 531 and squeeze the first connecting spring 66, thereby releasing the limit on the first notch 68. During the process that the piston plate 39 slides downward in the empty chamber 37 and the spring rope 411 changes from a spiral state to a straight state, the piston plate 39 will squeeze the air inside the empty chamber 37 into the interior of the exhaust pipe 62, and enter the interior of the liquid inlet 531 through the exhaust joint 64. The air passes through the first notch 68 and enters the interior of the cooling channel 532, and will squeeze the residual coolant inside the cooling channel 532, so as to discharge the coolant through the second notch 71 from the liquid outlet 533 into the interior of the auxiliary drainage joint 60, and then flow into the interior of the liquid storage tank 47 through the auxiliary water inlet pipe 58, preventing the coolant remaining inside the cooling channel 532 from causing the hot melt adhesive entering the gel space to solidify too quickly, resulting in unevenness on the surface of the hot melt film.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A hot melt adhesive sheet forming machine, comprising a support frame (1), and a connecting frame (11) mounted on an outer wall of the support frame (1), characterized in that: A driving assembly for driving the lower mold (9) to move is arranged on the outer wall of the support frame (1), and the driving assembly comprises a connecting shaft (12) mounted on the outer wall of the support frame (1), and auxiliary gears (2) symmetrically distributed along the central axis of the support frame (1), a chain (3) is rotatably connected to the outer wall of the auxiliary gear (2), a fixed block (4) is fixedly connected to the outer wall of the chain (3), a supporting shaft (5) adapted for the lower mold (9) is arranged on the outer wall of the fixed block (4), and the connecting shaft (12) is rotatably connected to the outer wall of the support frame (1). A connecting shaft (12) is connected, a transmission gear (13) adapted to the chain (3) is arranged on the outer wall of the connecting shaft (12), and a motor (14) adapted to the connecting shaft (12) is arranged on the outer wall of the support frame (1); the lower mold (9) comprises a lower mold 1 (901), a lower mold 2 (902) and a lower mold 3 (903), a glue injection component for injecting material into the lower mold (9) is arranged on the outer wall of the connecting frame (11), and a cooling component for cooling the film is arranged on the outer wall of the connecting frame (11).

2. A hot melt adhesive sheet forming machine according to claim 1, characterized in that: The driving assembly further comprises a limiting column (6) and a demoulding mechanism mounted on the outer wall of the fixing block (4); a guide groove (7) adapted to the supporting shaft (5) is provided on the outer wall of the supporting frame (1); and a limiting groove (8) adapted to the limiting column (6) is provided on the outer wall of the supporting frame (1).

3. A hot melt adhesive sheet forming machine according to claim 2, characterized in that: The demoulding mechanism comprises a connecting plate (72) arranged on the inner wall of the lower mold (9), and a top plate (77) installed on the outer wall of the support frame (1); push rods (73) are evenly spaced on the top outer wall of the connecting plate (72); a pressing spring (74) adapted to the connecting plate (72) is arranged on the inner wall of the lower mold (9); a limiting block (75) is fixedly connected to the outer wall of the connecting plate (72); and a push plate (76) adapted to the top plate (77) is arranged on the bottom outer wall of the connecting plate (72).

4. A hot melt adhesive sheet forming machine according to claim 1, characterized in that: The glue injection assembly comprises a melt bin (15) mounted on the outer wall of the connecting frame (11) for heating hot melt glue particles, and a vacuum pump (22) mounted on the outer wall at the top end of the melt bin (15); a suction pipe (23) adapted to the melt bin (15) is arranged on the outer wall at one end of the vacuum pump (22); a second telescopic pipe (26) adapted to the suction pipe (23) is arranged on the inner wall of the melt bin (15); a push rod (27) is fixedly connected to the inner wall of the melt bin (15) at the center position of the second telescopic pipe (26); and the melt A threaded rod (28) is rotatably connected to the inner wall of the bin (15); an extrusion plate (29) is threadedly connected to the outer wall of the threaded rod (28); a through hole (30) adapted to the second telescopic tube (26) is provided on the outer wall of the extrusion plate (29); a connecting column (31) is slidably connected to the inner wall of the extrusion plate (29); a limiting plate (32) adapted to the through hole (30) is provided on the outer wall of one end of the connecting column (31); and a first limiting spring (33) adapted to the connecting column (31) is provided on the inner wall of the extrusion plate (29).

5. A hot melt adhesive sheet forming machine according to claim 4, characterized in that: The limiting plates (32) are slidably connected to the extrusion plates (29) via the connecting columns (31), and a plurality of groups of the limiting plates (32) are arranged on the surface of the connecting columns (31).

6. A hot melt adhesive sheet forming machine according to claim 4, characterized in that: The injection assembly further comprises a first telescopic tube (16) and an exhaust mechanism mounted on the outer wall of the bottom end of the melt bin (15); an upper mold (17) is fixedly connected to the outer wall of the bottom end of the first telescopic tube (16); an electric valve (18) is installed between the first telescopic tube (16) and the upper mold (17); a cylinder (19) is fixedly connected to the inner wall of the connecting frame (11); a connecting block (20) is fixedly connected to the outer wall of the bottom end of the cylinder (19); a slide groove (21) adapted to the connecting block (20) is provided on the outer wall of the upper mold (17); an empty bin (37) is provided on the inner wall of the connecting frame (11); a second limit spring (38) is fixedly connected to the inner wall of the empty bin (37); and an outer wall of one end of the second limit spring (38) is provided with an empty bin (37). 7) a piston plate (39) adapted thereto, a connecting rod (40) adapted thereto for the connecting block (20) being arranged on the outer wall of the piston plate (39), a pull rope (41) being fixedly connected thereto on the outer wall at the top end of the piston plate (39), the pull rope (41) comprising a spring rope (411) and a nylon rope (412), a rotating sleeve (42) being rotatably connected thereto on the inner wall of the melt chamber (15), a spring (43) adapted thereto for the rotating sleeve (42) being arranged on the inner wall of the melt chamber (15), a ratchet (44) adapted thereto for the nylon rope (412) being arranged on the outer wall of one end of the rotating sleeve (42), a pawl (45) adapted thereto for the ratchet (44) being arranged on the outer wall of the threaded rod (28), and a spring sheet (46) adapted thereto for the pawl (45) being arranged on the outer wall of the threaded rod (28).

7. A hot melt adhesive sheet forming machine according to claim 6, characterized in that: The vacuum mechanism comprises an electric three-way valve (24) mounted on the outer wall of the suction pipe (23), and a through groove (34) provided on the inner wall of the upper mold (17); a rubber pad (10) is bonded to the outer wall of the top end of the lower mold (9); a vacuum hose (25) adapted to the through groove (34) is provided on the outer wall of one end of the electric three-way valve (24); a guide plate (35) is fixedly connected to the inner wall of the bottom end of the upper mold (17); and a plurality of groups of V-shaped flow dividers (36) adapted to the through grooves (34) are provided on the outer wall of the guide plate (35).

8. A hot melt adhesive sheet forming machine according to claim 1, characterized in that: The cooling assembly comprises a liquid storage tank (47) and a recovery mechanism mounted on the outer wall of the support frame (1) for storing coolant; a water pump (48) adapted to the liquid storage tank (47) is arranged on the outer wall of the support frame (1); a water outlet pipe (49) is arranged on the outer wall of the water pump (48); a water outlet telescopic pipe (50) adapted to the water outlet pipe (49) is arranged on the inner wall of the support frame (1); a water outlet joint (51) is arranged on the outer wall of one end of the water outlet telescopic pipe (50); a water outlet spring (52) adapted to the water outlet joint (51) is arranged on the inner wall of the support frame (1); a cooling groove (53) is provided on the inner wall of the lower mold (9); the cooling groove (53) comprises a liquid inlet (531), a cooling channel (532) and a liquid outlet (533); a drainage telescopic pipe (54) is arranged on the inner wall of the support frame (1); a liquid outlet spring (52) adapted to the water outlet joint (51) is arranged on the outer wall of one end of the drainage telescopic pipe (54); A drainage joint (55) adapted to the liquid inlet (533) is provided on the outer wall of one end of the drainage telescopic tube (54), a water inlet pipe (56) adapted to the liquid storage tank (47) is provided on the outer wall of one end of the drainage telescopic tube (54), a drainage spring (57) adapted to the drainage joint (55) is provided on the inner wall of the support frame (1), a first connecting spring (66) is fixedly connected to the inner wall of the liquid inlet (531), a first blocking plate (67) adapted to the water outlet joint (51) is provided on the outer wall of one end of the first connecting spring (66), the outer edge of the first blocking plate (67) having first notches (68) distributed at equal intervals along the circumferential direction, a second connecting spring (69) is fixedly connected to the inner wall of the liquid outlet (533), a second blocking plate (70) adapted to the drainage joint (55) is provided on the outer wall of one end of the second connecting spring (69), the outer edge of the second blocking plate (70) having second notches (71) distributed at equal intervals along the circumferential direction.

9. A hot melt adhesive sheet forming machine according to claim 8, characterized in that: The recovery mechanism comprises an auxiliary water inlet pipe (58) arranged on the outer wall of the water inlet pipe (56), and an exhaust pipe (62) mounted on the inner wall of the connecting frame (11) and adapted to the empty chamber (37); an auxiliary drainage telescopic pipe (59) adapted to the auxiliary water inlet pipe (58) is arranged on the inner wall of the support frame (1); an auxiliary drainage joint (60) adapted to the liquid outlet (533) is arranged on the outer wall of one end of the auxiliary drainage telescopic pipe (59); an auxiliary drainage spring (61) adapted to the auxiliary drainage joint (60) is arranged on the inner wall of the support frame (1); an exhaust telescopic pipe (63) is fixedly connected to the outer wall of one end of the exhaust pipe (62); an exhaust joint (64) adapted to the liquid inlet (531) is arranged on the outer wall of one end of the exhaust telescopic pipe (63); and an exhaust spring (65) adapted to the exhaust joint (64) is arranged on the inner wall of the connecting frame (11).

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