Efficient cooling device for positive and negative pressure plastic vacuum forming machine

Abstract

The invention relates to the technical field of plastic processing, and discloses an efficient cooling device for a positive and negative pressure plastic suction machine, which comprises a main body, a synchronous conveying mechanism, a positive and negative pressure plastic suction mechanism and a multi-stage expansion sealing mechanism, a plastic suction bin is arranged in the middle of the main body, a heating bin is arranged on the left side of the plastic suction bin, a discharging bin is arranged on the other side of the plastic suction bin, and an air blower is arranged between the plastic suction bin and the discharging bin. By arranging the synchronous material conveying mechanism, a sliding rod can enter a driving groove in the surface of a driving disc when rotating, the driving disc is driven to start to rotate while moving in the driving groove, and a material collecting shaft is driven to start to rotate when the driving disc moves, so that a material collecting roller outside the material collecting shaft starts to rotate, and a thermoplastic film is driven to start to move in the direction of the material collecting roller; and when the sliding rod is separated from the driving groove, the driving disc stops rotating, at the moment, the material collecting roller stops moving, the thermoplastic film stops moving, and therefore periodic intermittent conveying of the thermoplastic film is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, in particular to a high-efficiency cooling device for a positive and negative pressure blister molding machine. Background Art

[0002] The positive and negative pressure blister machine is a plastic molding equipment that combines positive and negative pressure technology. It uses the effects of vacuum and air pressure to adsorb the heated and softened plastic sheet on the mold, and after cooling, it forms the desired plastic product. The working principle of the positive and negative pressure blister machine mainly depends on the synergy of vacuum and air pressure. First, place the pre-heated and softened plastic sheet on the molding cavity, and close the mold. Then, the mold is heated by the heating system to soften the plastic sheet to a certain extent. Then, the pneumatic system adjusts the pressure in the mold to an appropriate level so that the softened plastic sheet fits the mold surface completely. At the same time, the vacuum system is started to draw the inside of the molding cavity into a negative pressure state, so that the plastic sheet fits more closely on the mold surface, and is blistered along the shape of the mold surface to form the desired product appearance.

[0003] The feeding mechanism and the positive and negative pressure blister mechanism in the existing positive and negative pressure blister machines are controlled by different controllers respectively. When they are not running synchronously, it is easy to cause the thermoplastic film to stick or tear. In addition, the positive and negative pressure blister mechanism mostly uses a single-layer sealing film for sealing during blister forming, which is prone to air leakage and the like, affecting the processing efficiency and forming quality. Therefore, an efficient cooling device for a positive and negative pressure blister machine is proposed. Summary of the invention

[0004] The present invention aims to solve the technical problem that the feeding mechanism and the positive and negative pressure blister mechanism in the existing positive and negative pressure blister machine are respectively controlled by different controllers, and when they operate asynchronously, it is easy to cause the thermoplastic film to stick or tear, and the positive and negative pressure blister mechanism mostly uses a single-layer sealing film for sealing during blister forming, which is prone to air leakage and the like, affecting the processing efficiency and forming quality. The present invention provides a high-efficiency cooling device for a positive and negative pressure blister machine.

[0005] The technical solution adopted by the present invention to solve the technical problem is: A high-efficiency cooling device for a positive and negative pressure blister machine, comprising a main body, a synchronous feeding mechanism, a positive and negative pressure blister mechanism and a multi-stage expansion sealing mechanism; A blister bin is provided in the middle of the main body, a heating bin is provided on the left side of the blister bin, a material discharge bin is provided on the other side of the blister bin, a blower is provided between the blister bin and the material discharge bin, a pair of first mounting frames are fixedly provided on the side wall of the main body close to the heating bin, a feeding roller is rotatably provided between the pair of first mounting frames, a pair of second mounting frames are fixedly provided on the side wall of the main body close to the material discharge bin, a material receiving roller is rotatably provided between the pair of second mounting frames, the synchronous feeding mechanism is provided at the end of the material receiving roller, the positive and negative pressure blister mechanism is provided inside the blister bin, and the multi-stage expansion sealing mechanism is provided on the positive and negative pressure blister machine The edge of the connection of the structure, a thermoplastic film is connected between the feeding roller and the receiving roller, the thermoplastic film passes through the heating bin, the blister bin and the lower bin horizontally in sequence, guide strips are arranged on the upper and lower sides of the thermoplastic film, a heater is fixedly arranged on the top of the heating bin, an air duct is connected to the bottom pipeline of the heater, the air duct is vertically arranged to the top of the heating bin, an induced draft fan is arranged in the middle of the air duct, the bottom end of the air duct extends to the interior of the heating bin, a diverter plate is connected to the bottom pipeline of the air duct, the diverter plate is located directly above the thermoplastic film, a plurality of air holes are opened at the bottom of the diverter plate, and a plurality of brackets are fixedly arranged at the bottom of the main body. During blister forming, the synchronous feeding mechanism drives the receiving roller to start rotating, driving the thermoplastic film to move in the direction of the receiving roller. When the thermoplastic film passes through the heating bin, it starts to be heated by the heater. At this time, the induced draft fan is started to transport the hot air flow to the diverter plate through the heat pipe, and then blown out along the air hole to heat the thermoplastic film. After heating, the thermoplastic film continues to move inside the blister bin, and the thermoplastic film can be blister formed by the positive and negative pressure blister mechanism. During the forming process, the sealing of the blister can be improved by the multi-stage expansion sealing mechanism, thereby improving the forming quality. The formed thermoplastic film enters the lower bin, and the blower arranged between the blister bin and the lower bin can efficiently cool the formed thermoplastic film. The cooled thermoplastic film enters the lower bin to collect the formed workpiece.

[0006] Furthermore, the synchronous feeding mechanism includes a driving wheel, which is arranged at the front side of the second mounting frame, a driving motor is connected to the center of the driving wheel, and the driving motor is fixedly connected to the second mounting frame. A first arc-shaped groove is arranged at the edge of the driving wheel, a lever is fixedly arranged at the inner middle part of the first arc-shaped groove, the lever is arranged along the shooting direction of the center of the driving wheel, a sliding rod is fixedly arranged at the outer end of the lever, and the sliding rod is arranged perpendicular to the driving wheel. When in use, the driving motor is started to drive the driving wheel to start rotating, and when the driving wheel rotates, the lever inside the center of the first arc-shaped groove is driven to start rotating, so that the sliding rod at the outer end of the lever starts to rotate synchronously.

[0007] Furthermore, the center of the receiving roller is connected to a receiving shaft, and a driving disk is fixedly arranged at one end of the receiving shaft facing the driving wheel, and a plurality of second arc grooves are evenly provided on the outer side of the driving disk, and the driving disk is slidably connected to the driving wheel through the second arc grooves, and a driving groove is provided between adjacent second arc grooves, and the inner end of the driving groove faces the center of the driving disk. When the slide bar rotates, it enters the driving groove on the surface of the driving disk, and drives the driving disk to start rotating while moving in the driving groove. When the driving disk moves, it drives the receiving shaft to start rotating, so that the receiving roller outside the receiving shaft starts to rotate, and drives the thermoplastic film to start moving toward the receiving roller. When the slide bar is separated from the driving groove, the driving disk stops rotating, and at this time, the receiving roller stops moving, and the thermoplastic film stops moving, thereby realizing periodic intermittent conveying of the thermoplastic film.

[0008] Furthermore, the length of the shifting rod matches the distance between the center of the driving wheel and the outer end of the adjacent driving groove, and the sliding rod is slidably connected to the driving groove.

[0009] Furthermore, the positive and negative pressure blister mechanism includes a first rotating wheel, which is arranged on a side of the second mounting frame away from the driving disk, the output end of the driving motor extends to the other side of the second mounting frame and is fixedly connected to the center of the first rotating wheel, a second rotating wheel is rotatably arranged on the rear side wall of the main body, a transmission belt is provided in the sleeve meshing between the second rotating wheel and the first rotating wheel, the diameter of the first rotating wheel is larger than the diameter of the second rotating wheel, a rotating rod is rotatably connected to the edge of the second rotating wheel, a vertical rod is rotatably connected to the other end of the rotating rod, and the vertical rod is slidably connected to the rear side wall of the main body through a limit block. When the driving wheel rotates, the first rotating wheel rotates accordingly, and when the first rotating wheel rotates, the second rotating wheel is driven to start rotating through the transmission belt meshing therewith, and when the second rotating wheel rotates, the rotating rod connected to its edge rotationally starts rotating, so that the vertical rod connected to the top of the rotating rod periodically moves up and down.

[0010] Furthermore, the top of the vertical rod is fixedly connected to an upper cross rod, the middle of the upper cross rod is provided with an upper connecting block, a plurality of guide rods are vertically provided on both sides of the interior of the blister bin, an upper slide plate is slidably provided on the upper side of the guide rod, the upper connecting block is fixedly connected to the upper slide plate, a blow molding table is fixedly provided at the bottom of the upper slide plate, a plurality of blow molding molds are fixedly provided at the bottom of the blow molding table, an upper rack is vertically connected to the bottom of one end of the upper cross rod away from the first rotating wheel, and a gear is meshed with the upper rack toward one side of the upper cross rod. The gear is rotatably connected to the rear side wall of the main body through a connecting shaft, and a lower rack is meshed with the other side of the gear, and the lower rack is arranged in parallel with the upper rack, and the bottom end of the lower rack is vertically connected to a lower cross bar, and the other end of the lower cross bar is fixedly connected to a lower connecting block, and the bottom of the guide rod is slidably connected to a lower slide plate, and the lower connecting block is fixedly connected to the lower slide plate, and a blister table is fixedly arranged on the top of the lower slide plate, and a plurality of blister grooves are opened on the surface of the blister table, and the size and position of the blow molding mold match the blister grooves. When the gear rotates, it drives the lower rack on the other side to move upward, so that the lower cross bar connected to the bottom of the lower rack moves upward, driving the lower connecting block to move upward, so that the lower slide plate moves upward, and the thermoforming table moves upward, so that the blow molding table and the thermoforming table move toward each other accordingly. The blow molding mold pipeline at the bottom of the blow molding table is connected with a positive pressure air pipe, and the thermoforming groove pipeline inside the thermoforming table is connected with a negative pressure air pipe, and the thermoforming film is subjected to positive and negative pressure thermoforming molding operation through the clamping of the blow molding mold and the thermoforming groove, so that the thermoplastic film is closely fitted to the surface of the thermoforming groove, so as to ensure the size accuracy and shape consistency of the finished product.

[0011] Furthermore, a second connecting block is fixedly provided at the bottom of one end of the upper cross bar away from the upper rack, a plurality of lifting rods are vertically provided at the top of the lower material bin, a connecting plate is fixedly provided in the middle of the lifting rod, and the connecting plate is fixedly connected to the second connecting block, a movable block is fixedly provided at the bottom of the lifting rod, a plurality of push rods are fixedly provided at the bottom of the movable block, and the position of the push rods matches the blow mold, and a material receiving bin is detachably provided at the bottom of the lower material bin, and a material receiving trough is provided inside the material receiving bin. After the molding is completed, the blister table and the blow molding table are reset under the movement of the second rotating wheel. At this time, the slide bar moves into the driving groove again, driving the receiving roller and the thermoplastic film to start moving, so that the formed thermoplastic film moves to the inside of the lower material bin, and then the slide bar disengages from the driving groove again, so that the receiving roller and the thermoplastic film stop moving. At this time, the upper cross bar moves downward again, driving the second connecting block to move downward, so that the connecting plate at the top of the lower material bin moves downward, driving the lifting rod to extend, so that the movable block moves downward, and when the movable block moves downward, it drives the bottom push rod to move downward, exerting downward pressure on the formed finished product, so that the finished product is separated from the thermoplastic film and enters the receiving bin at the bottom, thereby realizing automatic and synchronous collection of the finished product.

[0012] Furthermore, the multi-stage expansion sealing mechanism includes an upper top bar, which is arranged around the bottom edge of the blow molding station, and a sealing film is arranged on the top edge of the blister molding station, and the sealing film is made of silicone. A lower sealing groove is opened on the top edge of the blister molding station, and the shape and size of the lower sealing groove match the upper top bar. When the blow molding station moves downward, the upper top bar at the bottom moves downward. When the upper top bar moves to contact the sealing film, downward pressure is applied to the sealing film, and the sealing film is pressed into the interior of the lower sealing groove, so that preliminary sealing is performed during blister molding on the blister molding station and the blow molding station.

[0013] Further, movable top blocks are movably arranged on both sides of the inner wall of the lower sealing groove, and the movable top blocks are arranged vertically with the lower sealing groove. The upper side of the other end of the movable top block is connected to a lower top strip by sliding through an inclined plane. A spring telescopic rod is connected between the bottom of the lower top strip and the inside of the blister platform. Upper sealing grooves are provided on both sides of the upper top strip, and the position and shape of the upper sealing grooves match the lower top strip. When the upper top strip moves toward the inside of the lower sealing groove, it squeezes the movable top blocks on both sides, so that the movable top blocks move away from the lower sealing groove. When the movable top block moves, it drives the lower top strip slidably connected to it through the inclined plane to move upward. At this time, the spring telescopic rod at the bottom of the lower top strip is extended, generating a pulling force in the opposite direction. When the lower top strip moves upward, it presses the sealing film at the top into the inside of the upper sealing groove at the top, so that the sealing films are staggeredly distributed at the edge connection of the blister platform and the blow molding platform, realizing multi-stage sealing of the blister platform and the blow molding platform, and improving the sealing effect.

[0014] Furthermore, the connections between the upper and lower top bars and the sealing membrane are spherically arranged. The spherical upper and lower top bars can reduce the pressure of the upper and lower top bars on the sealing membrane, thereby increasing the service life of the sealing membrane.

[0015] Beneficial effects of the present invention: 1. The high-efficiency cooling device for the positive and negative pressure blister molding machine of the present invention is provided with a synchronous feeding mechanism, which can enter the driving groove on the surface of the driving disk when the slide bar rotates, and drive the driving disk to start rotating while moving in the driving groove. When the driving disk moves, it drives the receiving shaft to start rotating, so that the receiving roller outside the receiving shaft starts to rotate, and drives the thermoplastic film to start moving in the direction of the receiving roller. When the slide bar is separated from the driving groove, the driving disk stops rotating, and at this time the receiving roller stops moving, and the thermoplastic film stops moving, thereby realizing periodic intermittent conveying of the thermoplastic film.

[0016] 2. The high-efficiency cooling device for the positive and negative pressure blister molding machine of the present invention is provided with a positive and negative pressure blister molding mechanism, which can drive the upper cross bar to move downward when the vertical bar moves downward. At this time, the slide bar is separated from the driving groove, the receiving roller and the thermoplastic film are in a stationary state, and the upper cross bar moves downward to drive the upper connecting block to move downward, so that the upper slide plate slides downward along the guide rod, and the upper slide plate moves downward to drive the bottom blow molding table to move downward, and at the same time, the upper cross bar moves downward to drive the upper rack to move downward, and the upper rack moves downward to drive the gear meshing with it to start rotating, and the gear rotates to drive The lower rack on the other side moves upward, so that the lower cross bar connected to the bottom of the lower rack moves upward, driving the lower connecting block to move upward, so that the lower slide plate moves upward, driving the blister table to move upward, so that the blow molding table and the blister table move toward each other, wherein the blow molding mold pipeline at the bottom of the blow molding table is connected with a positive pressure air pipe, and the blister groove pipeline inside the blister table is connected with a negative pressure air pipe, and the thermoplastic film is subjected to positive and negative pressure blister molding operation through the engagement of the blow molding mold and the blister groove, so that the thermoplastic film fits closely to the surface of the blister groove, thereby ensuring the size accuracy and shape consistency of the finished product.

[0017] 3. The high-efficiency cooling device for the positive and negative pressure blister molding machine of the present invention is provided with a multi-stage expansion sealing mechanism, which can squeeze the movable top blocks on both sides when the upper top bar moves into the lower sealing groove, so that the movable top blocks move in the direction away from the lower sealing groove, and the movable top blocks drive the lower top bar slidingly connected to it through the inclined surface to move upward when the movable top blocks move. At this time, the spring telescopic rod at the bottom of the lower top bar is extended to generate a pulling force in the opposite direction, and the lower top bar presses the top sealing film into the top upper sealing groove when it moves upward, so that the sealing films are staggeredly distributed at the edge connection of the blister molding table and the blow molding table, thereby realizing multi-stage sealing of the blister molding table and the blow molding table and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the overall structure of the high-efficiency cooling device for the positive and negative pressure blister machine; Figure 2 This is a schematic diagram of the synchronous feeding mechanism of the high-efficiency cooling device for the positive and negative pressure blister machine; Figure 3 This is a schematic diagram of the main back structure of the high-efficiency cooling device for the positive and negative pressure blister machine; Figure 4 This is a schematic diagram of a multi-stage expansion sealing mechanism of a high-efficiency cooling device for a positive and negative pressure blister machine; Figure 5 It is an enlarged schematic diagram of the structure of location A of the high-efficiency cooling device for the positive and negative pressure blister machine.

[0019] Description of reference numerals: 1. main body; 2. bracket; 3. heater; 4. first mounting frame; 5. feeding roller; 6. thermoplastic film; 7. heating chamber; 8. blister chamber; 9. unloading chamber; 10. second mounting frame; 12. receiving roller; 13. guide strip; 14. air duct; 15. induced draft fan; 16; diverter plate; 17. guide rod; 18. upper slide plate; 19. blow molding table; 20. blow molding mold; 21. lower slide plate; 22. blister table; 23. lifting rod; 24. connecting plate; 25. movable block; 26. ejector rod; 27. receiving chamber; 28. receiving trough; 29. ​​first rotating wheel; 30. drive Motor; 31, driving wheel; 32, first arc groove; 33, lever; 34, slide bar; 35, driving plate; 36, second guide groove; 37, driving groove; 38, transmission belt; 39, second rotating wheel; 40, rotating rod; 41, vertical rod; 42, upper cross bar; 43, upper rack; 44, gear; 45, lower rack; 46, lower cross bar; 47, upper connecting block; 48, second connecting block; 49, lower connecting block; 50, blister groove; 51, upper top strip; 52, upper sealing groove; 53, lower sealing groove; 54, sealing film; 55, movable top block; 56, lower top strip; 57, spring telescopic rod. DETAILED DESCRIPTION

[0020] The concept and technical effects of the present invention will be clearly and completely described below in conjunction with embodiments to fully understand the purpose, features and effects of the present invention.

[0021] like Figure 1-5 As shown, a high-efficiency cooling device for a positive and negative pressure blister machine comprises a main body 1, a synchronous feeding mechanism, a positive and negative pressure blister mechanism and a multi-stage expansion sealing mechanism; A blister bin 8 is provided in the middle of the main body 1, a heating bin 7 is provided on the left side of the blister bin 8, a lower material bin 9 is provided on the other side of the blister bin 8, a blower is provided between the blister bin 8 and the lower material bin 9, a pair of first mounting frames 4 are fixedly provided on the side wall of the main body 1 close to the heating bin 7, a feeding roller 5 is rotatably provided between the pair of first mounting frames 4, a pair of second mounting frames 10 are fixedly provided on the side wall of the main body 1 close to the lower material bin 9, a receiving roller 12 is rotatably provided between the pair of second mounting frames 10, the synchronous feeding mechanism is provided at the end of the receiving roller 12, the positive and negative pressure blister mechanism is provided inside the blister bin 8, and the multi-stage expansion sealing mechanism is provided at the edge of the connection of the positive and negative pressure blister mechanism. Along, a thermoplastic film 6 is connected between the feeding roller 5 and the receiving roller 12, and the thermoplastic film 6 passes through the heating bin 7, the blister bin 8 and the lower bin 9 horizontally in sequence, and guide strips 13 are provided on the upper and lower sides of the thermoplastic film 6. A heater 3 is fixedly provided on the top of the heating bin 7, and a duct 14 is connected to the bottom pipeline of the heater 3. The duct 14 is vertically arranged with the top of the heating bin 7, and an induced draft fan 15 is arranged in the middle of the duct 14. The bottom end of the duct 14 extends to the interior of the heating bin 7, and a diverter plate 16 is connected to the bottom pipeline of the duct 14. The diverter plate 16 is located directly above the thermoplastic film 6, and a plurality of air holes are provided at the bottom of the diverter plate 16. A plurality of brackets 2 are fixedly provided at the bottom of the main body 1. During blister forming, the synchronous feeding mechanism drives the receiving roller 12 to start rotating, driving the thermoplastic film 6 to move in the direction of the receiving roller 12. When the thermoplastic film 6 passes through the heating bin 7, it starts to be heated by the heater 3. At this time, the induced draft fan 15 is started to transport the hot air flow to the diverter plate 16 through the heat pipe, and then blown out along the air hole to heat the thermoplastic film 6. After heating, the thermoplastic film 6 continues to move inside the blister bin 8. The thermoplastic film 6 can be blister formed by the positive and negative pressure blister forming mechanism. During the forming process, the sealing performance during blister forming can be improved by the multi-stage expansion sealing mechanism, thereby improving the forming quality. The formed thermoplastic film 6 enters the interior of the lower bin 9. The blower arranged between the blister bin 8 and the lower bin 9 can efficiently cool the formed thermoplastic film 6. The cooled thermoplastic film 6 enters the lower bin 9 to collect the formed workpiece.

[0022] The synchronous feeding mechanism includes a driving wheel 31, which is arranged at the front side of the second mounting frame 10. A driving motor 30 is connected to the center of the driving wheel 31, and the driving motor 30 is fixedly connected to the second mounting frame 10. A first arc-shaped groove 32 is arranged at the edge of the driving wheel 31, and a lever 33 is fixedly arranged at the inner middle part of the first arc-shaped groove 32. The lever 33 is arranged along the shooting direction of the center of the driving wheel 31, and a sliding rod 34 is fixedly arranged at the outer end of the lever 33, and the sliding rod 34 is arranged perpendicular to the driving wheel 31. When in use, the driving motor 30 is started to drive the driving wheel 31 to start rotating. When the driving wheel 31 rotates, the lever 33 on the inner side of the center of the first arc-shaped groove 32 is driven to start rotating, so that the sliding rod 34 at the outer end of the lever 33 starts to rotate synchronously.

[0023] The center of the receiving roller 12 is connected with a receiving shaft, and a driving disc 35 is fixedly provided at one end of the receiving shaft facing the driving wheel 31. A plurality of second arc grooves are evenly provided on the outer side of the driving disc 35, and the driving disc 35 is slidably connected with the driving wheel 31 through the second arc grooves. A driving groove 37 is provided between adjacent second arc grooves, and the inner end of the driving groove 37 faces the center of the driving disc 35. When the slide bar 34 rotates, it enters the driving groove 37 on the surface of the driving disc 35, and drives the driving disc 35 to start rotating while moving in the driving groove 37. When the driving disc 35 moves, it drives the receiving shaft to start rotating, so that the receiving roller 12 outside the receiving shaft starts to rotate, and drives the thermoplastic film 6 to start moving toward the receiving roller 12. When the slide bar 34 is separated from the driving groove 37, the driving disc 35 stops rotating, and at this time, the receiving roller 12 stops moving, and the thermoplastic film 6 stops moving, thereby realizing the periodic intermittent conveying of the thermoplastic film 6.

[0024] The length of the shifting rod 33 matches the distance between the center of the driving wheel 31 and the outer end of the adjacent driving slot 37 , and the sliding rod 34 is slidably connected to the driving slot 37 .

[0025] The positive and negative pressure blister mechanism includes a first rotating wheel 29, which is arranged on the side of the second mounting frame 10 away from the driving disk 35, and the output end of the driving motor 30 extends to the other side of the second mounting frame 10 and is fixedly connected to the center of the first rotating wheel 29. The rear side wall of the main body 1 is rotatably provided with a second rotating wheel 39, and a transmission belt 38 is provided in a sleeve meshed between the second rotating wheel 39 and the first rotating wheel 29. The diameter of the first rotating wheel 29 is larger than the diameter of the second rotating wheel 39, and the edge of the second rotating wheel 39 is rotatably connected with a rotating rod 40, and the other end of the rotating rod 40 is rotatably connected with a vertical rod 41, and the vertical rod 41 is slidably connected to the rear side wall of the main body 1 through a limit block. When the driving wheel 31 rotates, the first rotating wheel 29 rotates accordingly, and when the first rotating wheel 29 rotates, the second rotating wheel 39 is driven to start rotating through the transmission belt 38 meshed with it, and when the second rotating wheel 39 rotates, it drives the rotating rod 40 connected to its edge to start rotating, so that the vertical rod 41 connected to the top of the rotating rod 40 periodically moves up and down.

[0026] The top of the vertical rod 41 is fixedly connected to an upper cross bar 42, and an upper connecting block 47 is provided in the middle of the upper cross bar 42. A plurality of guide rods 17 are vertically provided on both sides of the interior of the blister bin 8, and an upper slide plate 18 is slidably provided on the upper side of the guide rod 17. The upper connecting block 47 is fixedly connected to the upper slide plate 18, and a blow molding table 19 is fixedly provided at the bottom of the upper slide plate 18. A plurality of blow molding molds 20 are fixedly provided at the bottom of the blow molding table 19. An upper rack 43 is vertically connected to the bottom of one end of the upper cross bar 42 away from the first rotating wheel 29, and a gear 44 is meshed with the upper rack 43 toward one side of the upper cross bar 42. The gear 44 is rotatably connected to the rear side wall of the main body 1 through a connecting shaft, and a lower rack 45 is meshed with the other side of the gear 44, and the lower rack 45 is arranged parallel to the upper rack 43. The bottom end of the lower rack 45 is vertically connected to a lower cross bar 46, and the other end of the lower cross bar 46 is fixedly connected to a lower connecting block 49. The bottom of the guide rod 17 is slidably connected to a lower slide plate 21, and the lower connecting block 49 is fixedly connected to the lower slide plate 21. A blister table 22 is fixedly arranged on the top of the lower slide plate 21, and a plurality of blister grooves 50 are opened on the surface of the blister table 22. The size and position of the blow mold 20 match the blister grooves 50. When the vertical rod 41 moves downward, it drives the upper cross bar 42 to move downward. At this time, the slide bar 34 is separated from the driving groove 37, and the receiving roller 12 and the thermoplastic film 6 are in a stationary state. When the upper cross bar 42 moves downward, it drives the upper connecting block 47 to move downward, so that the upper slide plate 18 slides downward along the guide rod 17. When the upper slide plate 18 moves downward, it drives the bottom blow molding table 19 to move downward. At the same time, when the upper cross bar 42 moves downward, it drives the upper rack 43 to move downward. When the upper rack 43 moves downward, it drives the gear 44 meshing with it to start rotating. When the gear 44 rotates, it drives the lower rack 45 on the other side to move upward, so that the lower rack 45 The lower cross bar 46 connected to the bottom of the rack 45 moves upward, driving the lower connecting block 49 to move upward, so that the lower slide plate 21 moves upward, driving the blister table 22 to move upward, so that the blow molding table 19 and the blister table 22 move toward each other, wherein the blow molding mold 20 at the bottom of the blow molding table 19 is connected to a positive pressure air pipe, and the blister groove 50 inside the blister table 22 is connected to a negative pressure air pipe. The thermoplastic film 6 is subjected to positive and negative pressure blister molding through the engagement of the blow molding mold 20 and the blister groove 50, so that the thermoplastic film 6 is closely attached to the surface of the blister groove 50, thereby ensuring the dimensional accuracy and shape consistency of the finished product.

[0027] A second connecting block 48 is fixedly provided at the bottom of one end of the upper cross bar 42 away from the upper rack 43, a plurality of lifting rods 23 are vertically provided on the top of the lower material bin 9, a connecting plate 24 is fixedly provided in the middle of the lifting rods 23, and the connecting plate 24 is fixedly connected to the second connecting block 48, a movable block 25 is fixedly provided at the bottom of the lifting rods 23, a plurality of ejector rods 26 are fixedly provided at the bottom of the movable block 25, and the position of the ejector rods 26 matches the blow mold 20, and a material receiving bin 27 is detachably provided at the bottom of the lower material bin 9, and a material receiving trough 28 is provided inside the material receiving bin 27. After the molding is completed, the suction molding table 22 and the blow molding table 19 are reset under the movement of the second rotating wheel 39. At this time, the slide bar 34 moves into the driving groove 37 again, driving the receiving roller 12 and the thermoplastic film 6 to start moving, so that the formed thermoplastic film 6 moves to the inside of the lower material bin 9, and then the slide bar 34 disengages from the driving groove 37 again, so that the receiving roller 12 and the thermoplastic film 6 stop moving. At this time, the upper cross bar 42 moves downward again, driving the second connecting block 48 to move downward, so that the connecting plate 24 at the top of the lower material bin 9 moves downward, driving the lifting rod 23 to extend, so that the movable block 25 moves downward, and when the movable block 25 moves downward, it drives the bottom push rod 26 to move downward, exerting downward pressure on the molded finished product, so that the finished product is separated from the thermoplastic film 6 and enters the receiving bin 27 at the bottom, thereby realizing automatic and synchronous collection of the finished product.

[0028] The multi-stage expansion sealing mechanism includes an upper top strip 51, which is arranged around the bottom edge of the blow molding station 19. A sealing film 54 is arranged on the top edge of the blister molding station 22, and the sealing film 54 is made of silicone. A lower sealing groove 53 is opened on the top edge of the blister molding station 22, and the shape and size of the lower sealing groove 53 match the upper top strip 51. When the blow molding station 19 moves downward, the upper top strip 51 at the bottom moves downward. When the upper top strip 51 moves to contact the sealing film 54, downward pressure is applied to the sealing film 54, and the sealing film 54 is pressed into the interior of the lower sealing groove 53, so that preliminary sealing is performed when the blister molding station 22 and the blow molding station 19 are blister molded.

[0029] Movable top blocks 55 are movably provided on both sides of the inner wall of the lower sealing groove 53, and the movable top blocks 55 are vertically arranged to the lower sealing groove 53. The upper side of the other end of the movable top block 55 is connected to a lower top bar 56 through an inclined sliding connection, and a spring telescopic rod 57 is connected between the bottom of the lower top bar 56 and the inside of the blister table 22. Upper sealing grooves 52 are opened on both sides of the upper top bar 51, and the position and shape of the upper sealing grooves 52 match those of the lower top bar 56. When the upper top strip 51 moves toward the interior of the lower sealing groove 53, it squeezes the movable top blocks 55 on both sides, causing the movable top blocks 55 to move in the direction away from the lower sealing groove 53. When the movable top blocks 55 move, they drive the lower top strip 56 slidably connected to it through the inclined surface to move upward. At this time, the spring telescopic rod 57 at the bottom of the lower top strip 56 extends, generating a pulling force in the opposite direction. When the lower top strip 56 moves upward, it presses the top sealing film 54 into the top upper sealing groove 52, so that the sealing films 54 are staggered at the edge connection of the blister platform 22 and the blow molding platform 19, thereby realizing multi-stage sealing of the blister platform 22 and the blow molding platform 19 and improving the sealing effect.

[0030] The connections between the upper top strip 51 and the lower top strip 56 and the sealing membrane 54 are all spherically arranged. The spherical arrangement of the upper top strip 51 and the lower top strip 56 can reduce the pressure of the upper top strip 51 and the lower top strip 56 on the sealing membrane 54 and increase the service life of the sealing membrane 54.

[0031] Working principle: During blister forming, the synchronous feeding mechanism drives the receiving roller 12 to start rotating, driving the thermoplastic film 6 to move in the direction of the receiving roller 12. When the thermoplastic film 6 passes through the heating bin 7, it starts to be heated by the heater 3. At this time, the induced draft fan 15 is started to transport the hot air flow to the diverter plate 16 through the heat pipe, and then blown out along the air hole to heat the thermoplastic film 6. After heating, the thermoplastic film 6 continues to move inside the blister bin 8. The thermoplastic film 6 can be blister formed by the positive and negative pressure blister mechanism. During the forming process, the sealing performance during blister forming can be improved by the multi-stage expansion sealing mechanism, thereby improving the forming quality. The formed thermoplastic film 6 enters the interior of the lower bin 9. The blower arranged between the blister bin 8 and the lower bin 9 can efficiently cool the formed thermoplastic film 6. The cooled thermoplastic film 6 enters the lower bin 9 to collect the formed workpiece.

[0032] When in use, the driving motor 30 is started to drive the driving wheel 31 to start rotating. When the driving wheel 31 rotates, it drives the lever 33 on the inner side of the center of the first arc groove 32 to start rotating, so that the sliding bar 34 at the outer end of the lever 33 starts to rotate synchronously. When the sliding bar 34 rotates, it enters the driving groove 37 on the surface of the driving disk 35, and drives the driving disk 35 to start rotating while moving in the driving groove 37. When the driving disk 35 moves, it drives the receiving shaft to start rotating, so that the receiving roller 12 outside the receiving shaft starts to rotate, and drives the thermoplastic film 6 to start moving in the direction of the receiving roller 12. When the sliding bar 34 disengages from the driving groove 37, the driving disk 35 stops rotating. At this time, the receiving roller 12 stops moving, and the thermoplastic film 6 stops moving, thereby realizing periodic intermittent conveying of the thermoplastic film 6.

[0033] When the driving wheel 31 rotates, the first rotating wheel 29 rotates accordingly. When the first rotating wheel 29 rotates, the second rotating wheel 39 is driven to rotate through the transmission belt 38 meshing therewith. When the second rotating wheel 39 rotates, it drives the rotating rod 40 connected to its edge to start rotating, so that the vertical rod 41 connected to the top of the rotating rod 40 periodically moves up and down. When the vertical rod 41 moves downward, it drives the upper cross bar 42 to move downward. At this time, the slide bar 34 is separated from the driving groove 37, and the receiving roller 12 and the thermoplastic film 6 are in a stationary state. When the upper cross bar 42 moves downward, it drives the upper connecting block 47 to move downward, so that the upper slide plate 18 slides downward along the guide rod 17. When the upper slide plate 18 moves downward, it drives the bottom blow molding table 19 to move downward. At the same time, when the upper cross bar 42 moves downward, it drives the upper rack 43 downward. When the upper rack 43 moves downward, it drives the gear 44 meshing with it to start rotating. When the gear 44 rotates, it drives the lower rack 45 on the other side to move upward, so that the lower cross bar 46 connected to the bottom of the lower rack 45 moves upward, driving the lower connecting block 49 to move upward, so that the lower slide plate 21 moves upward, driving the blister table 22 to move upward, so that the blow molding table 19 and the blister table 22 move toward each other, wherein the blow molding mold 20 at the bottom of the blow molding table 19 is connected to a positive pressure air pipe, and the blister groove 50 inside the blister table 22 is connected to a negative pressure air pipe. The thermoplastic film 6 is subjected to positive and negative pressure blister molding operations through the engagement of the blow molding mold 20 and the blister groove 50, so that the thermoplastic film 6 is closely attached to the surface of the blister groove 50, thereby ensuring the dimensional accuracy and shape consistency of the finished product.

[0034] After the molding is completed, the suction molding table 22 and the blow molding table 19 are reset under the movement of the second rotating wheel 39. At this time, the slide bar 34 moves into the driving groove 37 again, driving the receiving roller 12 and the thermoplastic film 6 to start moving, so that the formed thermoplastic film 6 moves to the inside of the lower material bin 9, and then the slide bar 34 disengages from the driving groove 37 again, so that the receiving roller 12 and the thermoplastic film 6 stop moving. At this time, the upper cross bar 42 moves downward again, driving the second connecting block 48 to move downward, so that the connecting plate 24 at the top of the lower material bin 9 moves downward, driving the lifting rod 23 to extend, so that the movable block 25 moves downward, and when the movable block 25 moves downward, it drives the bottom push rod 26 to move downward, exerting downward pressure on the molded finished product, so that the finished product is separated from the thermoplastic film 6 and enters the receiving bin 27 at the bottom, thereby realizing automatic and synchronous collection of the finished product.

[0035] When the blow molding table 19 moves downward, the upper top strip 51 at the bottom moves downward. When the upper top strip 51 moves to contact the sealing film 54, downward pressure is applied to the sealing film 54, and the sealing film 54 is pressed into the lower sealing groove 53, so that a preliminary seal is performed during the vacuum molding of the vacuum molding table 22 and the blow molding table 19. When the upper top strip 51 moves into the lower sealing groove 53, it squeezes the movable top blocks 55 on both sides, so that the movable top blocks 55 move in a direction away from the lower sealing groove 53. When the movable top block 55 moves, it drives the lower top strip 51 which is slidably connected to it through the inclined surface. 6 moves upward, at this time, the spring telescopic rod 57 at the bottom of the lower top bar 56 is extended, generating a pulling force in the opposite direction, and the lower top bar 56 presses the top sealing film 54 into the top upper sealing groove 52 when moving upward, so that the sealing film 54 is staggeredly distributed at the edge connection of the blister platform 22 and the blow molding platform 19, realizing multi-stage sealing of the blister platform 22 and the blow molding platform 19, improving the sealing effect, and through the spherical arrangement of the upper top bar 51 and the lower top bar 56, the pressure of the upper top bar 51 and the lower top bar 56 on the sealing film 54 can be reduced, thereby increasing the service life of the sealing film 54.

[0036] The above embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work shall all fall within the scope of protection of the present invention.

Claims

1. A high-efficiency cooling device for a positive and negative pressure blister machine, characterized in that: It comprises a main body (1), a synchronous feeding mechanism, a positive and negative pressure blister mechanism and a multi-stage expansion sealing mechanism; A blister bin (8) is provided in the middle of the main body (1), a heating bin (7) is provided on the left side of the blister bin (8), a material discharge bin (9) is provided on the other side of the blister bin (8), and a blower is provided between the blister bin (8) and the material discharge bin (9). A pair of first mounting frames (4) are fixedly provided on the side wall of the main body (1) close to the heating bin (7), and a feeding roller (5) is rotatably provided between the pair of first mounting frames (4). A pair of second mounting frames (10) are fixedly provided on the side wall of the main body (1) close to the material discharge bin (9), and a material receiving roller (12) is rotatably provided between the pair of second mounting frames (10). The synchronous feeding mechanism is provided at the end of the material receiving roller (12). The positive and negative pressure blister mechanism is provided inside the blister bin (8), and the multi-stage expansion sealing mechanism is provided at the edge of the connection between the positive and negative pressure blister mechanism. A thermoplastic film (6) is connected between the roller (5) and the receiving roller (12), and the thermoplastic film (6) passes horizontally through the heating bin (7), the blister bin (8) and the unloading bin (9) in sequence. Guide strips (13) are provided on both upper and lower sides of the thermoplastic film (6). A heater (3) is fixedly provided on the top of the heating bin (7), and a bottom pipeline of the heater (3) is connected to an air duct (14). The air duct (14) is vertically arranged with the top of the heating bin (7). An induced draft fan (15) is provided in the middle of the air duct (14). The bottom end of the air duct (14) extends to the interior of the heating bin (7). The bottom pipeline of the air duct (14) is connected to a diverter plate (16), and the diverter plate (16) is located directly above the thermoplastic film (6). A plurality of air holes are provided at the bottom of the diverter plate (16). A plurality of brackets (2) are fixedly provided at the bottom of the main body (1).

2. A high-efficiency cooling device for a positive and negative pressure blister machine according to claim 1, characterized in that The synchronous feeding mechanism comprises a driving wheel (31), the driving wheel (31) is arranged on the front side of the second mounting frame (10), the center of the driving wheel (31) is connected to a driving motor (30), the driving motor (30) is fixedly connected to the second mounting frame (10), the edge of the driving wheel (31) is provided with a first arc groove (32), a lever (33) is fixedly provided in the middle of the inner side of the first arc groove (32), the lever (33) is arranged along the ray direction of the center of the driving wheel (31), the outer end of the lever (33) is fixedly provided with a sliding rod (34), and the sliding rod (34) is arranged perpendicular to the driving wheel (31).

3. A high-efficiency cooling device for a positive and negative pressure blister machine according to claim 2, characterized in that The center of the receiving roller (12) is connected to a receiving shaft, and a driving disc (35) is fixedly provided at one end of the receiving shaft facing the driving wheel (31), and a plurality of second arc grooves (36) are evenly formed on the outer side of the driving disc (35), and the driving disc (35) is slidably connected to the driving wheel (31) through the second arc grooves (36), and a driving groove (37) is formed between adjacent second arc grooves (36), and the inner end of the driving groove (37) faces the center of the driving disc (35).

4. A high-efficiency cooling device for a positive and negative pressure blister machine according to claim 3, characterized in that The length of the shifting rod (33) matches the distance between the center of the driving wheel (31) and the outer end of the adjacent driving groove (37), and the sliding rod (34) is slidably connected to the driving groove (37).

5. The high-efficiency cooling device for positive and negative pressure blister molding machine according to claim 3 is characterized in that The positive and negative pressure blister mechanism comprises a first rotating wheel (29), the first rotating wheel (29) being arranged on a side of the second mounting frame (10) away from the driving disk (35), the output end of the driving motor (30) extending to the other side of the second mounting frame (10) and fixedly connected to the center of the first rotating wheel (29), a second rotating wheel (39) being rotatably arranged on the rear side wall of the main body (1), a transmission belt (38) being arranged in a sleeve meshing between the second rotating wheel (39) and the first rotating wheel (29), the diameter of the first rotating wheel (29) being larger than the diameter of the second rotating wheel (39), the edge of the second rotating wheel (39) being rotatably connected to a rotating rod (40), the other end of the rotating rod (40) being rotatably connected to a vertical rod (41), the vertical rod (41) being slidably connected to the rear side wall of the main body (1) via a limit block.

6. A high-efficiency cooling device for a positive and negative pressure blister machine according to claim 5, characterized in that The top of the vertical rod (41) is fixedly connected to an upper cross rod (42), and an upper connecting block (47) is arranged in the middle of the upper cross rod (42). A plurality of guide rods (17) are vertically arranged on both sides of the interior of the blister bin (8). An upper slide plate (18) is slidably arranged on the upper side of the guide rod (17), and the upper connecting block (47) is fixedly connected to the upper slide plate (18). A blow molding table (19) is fixedly arranged at the bottom of the upper slide plate (18), and a plurality of blow molding molds (20) are fixedly arranged at the bottom of the blow molding table (19). An upper rack (43) is vertically connected to the bottom of one end of the upper cross rod (42) away from the first rotating wheel (29), and a gear (44) is meshed with the upper rack (43) toward one side of the upper cross rod (42). The gear (44) is rotatably connected to the rear side wall of the main body (1) via a connecting shaft; a lower rack (45) is meshed with the other side of the gear (44); the lower rack (45) is arranged in parallel with the upper rack (43); the bottom end of the lower rack (45) is vertically connected to a lower cross bar (46); the other end of the lower cross bar (46) is fixedly connected to a lower connecting block (47); the bottom of the guide rod (17) is slidably connected to a lower slide plate (18); the lower connecting block (47) is fixedly connected to the lower slide plate (18); a blister table (22) is fixedly arranged on the top of the lower slide plate (18); a plurality of blister grooves (50) are provided on the surface of the blister table (22); the size and position of the blow molding mold (20) match the blister grooves (50).

7. A high-efficiency cooling device for a positive and negative pressure blister machine according to claim 6, characterized in that A second connecting block (48) is fixedly provided at the bottom of one end of the upper cross bar (42) away from the upper rack (43); a plurality of lifting rods (23) are vertically provided on the top of the lower material bin (9); a connecting plate (24) is fixedly provided in the middle of the lifting rod (23); the connecting plate (24) is fixedly connected to the second connecting block (48); a movable block (25) is fixedly provided at the bottom of the lifting rod (23); a plurality of ejector rods (26) are fixedly provided at the bottom of the movable block (25); the position of the ejector rods (26) matches the blow mold (20); a material receiving bin (27) is detachably provided at the bottom of the lower material bin (9); a material receiving trough (28) is provided inside the material receiving bin (27).

8. The high-efficiency cooling device for a positive and negative pressure blister machine according to claim 6, characterized in that The multi-stage expansion sealing mechanism comprises an upper top strip (51), the upper top strip (51) is arranged around the bottom edge of the blow molding platform (19), the top edge of the blister platform (22) is provided with a sealing film (54), the sealing film (54) is made of silicone, and the top edge of the blister platform (22) is provided with a lower sealing groove (53), the shape and size of the lower sealing groove (53) match the upper top strip (51).

9. A high-efficiency cooling device for a positive and negative pressure blister machine according to claim 8, characterized in that : Movable top blocks (55) are movably provided on both sides of the inner wall of the lower sealing groove (53), and the movable top blocks (55) are vertically arranged with the lower sealing groove (53). The upper side of the other end of the movable top block (55) is connected to a lower top bar (56) by sliding on an inclined surface. A spring telescopic rod (57) is connected between the bottom of the lower top bar (56) and the inside of the blister table (22). Upper sealing grooves (52) are provided on both sides of the upper top bar (51), and the position and shape of the upper sealing grooves (52) match those of the lower top bar (56).

10. A high-efficiency cooling device for a positive and negative pressure blister molding machine according to claim 9, characterized in that The connection points between the upper top strip (51) and the lower top strip (56) and the sealing membrane (54) are all spherical.

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