Efficient double-station plate plastic vacuum forming machine

Abstract

The invention relates to the technical field of plastic vacuum forming machines, in particular to an efficient double-station plate plastic vacuum forming machine. The plastic uptake equipment is provided with a first plastic uptake device, a second plastic uptake device and a feeding mechanism which are symmetrically distributed along the Y axis, and the feeding mechanism comprises a first stock bin assembly for providing plates for the first plastic uptake device and a second stock bin assembly for providing plates for the second plastic uptake device; the conveying mechanism is used for conveying finished products subjected to plastic uptake on the first plastic uptake device and the second plastic uptake device in the plastic uptake equipment to the next device; the first stock bin assembly is located between the first plastic uptake device and the conveying mechanism, and the second stock bin assembly is located between the second plastic uptake device and the conveying mechanism. The telescopic fork mechanism is used for feeding plates in the feeding mechanism and discharging finished products to the conveying mechanism for the first blister device and the second blister device; the telescopic plates at all levels can stretch and retract bidirectionally along the X axis, plates and finished products are taken and placed circularly between double stations, feeding and discharging actions are completed synchronously, the single-time production period is shortened, and the plastic uptake efficiency of the plates is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic thermoforming machines, and particularly relates to an efficient double-station sheet plastic thermoforming machine. Background Art

[0002] A plastic thermoforming machine, also known as a thermoplastic forming machine, is a machine that sucks heated and plasticized thermoplastic coils such as PC, ABS, PC / ABS, PE, PP, PET, and PETG into various shapes of high-grade packaging boxes, frames, and other products. By using the vacuum suction generated by a vacuum pump, the heated and softened thermoplastic sheet is sucked into various shapes of vacuum covers, plastic trays, blister shells, etc. through a mold.

[0003] For existing plastic thermoforming machines, when the incoming material is not a coil but stacked sheets, as disclosed in the patent document with the application number CN201711373322.0, "A New Type of Double-Station Plastic Thermoforming Machine and Control Method", it specifically discloses "a new type of double-station plastic thermoforming machine, including a frame 100, a vacuum box 200, a plastic thermoforming mold 220 arranged in the vacuum box 200, a heating device 500, a support frame 300 for placing sheets, and a pressing device 600. The support frame 30 is divided into an upper support frame 310 and a lower support frame 320. A mold frame 330 for placing sheets is arranged in the lower support frame 320, and the upper support frame 310 can be lifted upward to separate from the lower support frame 320; four support cylinders 340 are arranged on the lower support frame 320, and the output shaft 341 of the support cylinder 340 is fixedly connected to the upper support frame 320. By simultaneously introducing a pressure air source into the four support cylinders 340, the upper support frame 320 can be lifted, so that sheets can be placed into the mold frame 330 or processed finished products can be taken out." The patent document does not disclose the loading and unloading mechanisms for placing sheets or taking out processed finished products. Since the upper support frame 310 in the plastic thermoforming machine needs to descend to fix the four sides of the sheet on the mold frame 330 to perform subsequent thermoforming on the sheet, the sheets can only be placed from below the upper support frame 310, that is, the problem of limited space for taking and placing materials needs to be considered; the inventor hopes to achieve double-station sheet plastic thermoforming, automatically take materials from the material bin and place them on the thermoforming station, and then take the finished products that have completed thermoforming on the thermoforming station and place them on the conveyor line; if a traditional servo electric cylinder module or a combination of a linear module, a cylinder, and a suction cup is set up to complete the transfer of the sheet from the material bin to the thermoforming station and then take the finished products that have completed thermoforming on the thermoforming station and place them on the conveyor line; the existing loading and unloading mechanisms, first, have a large overall footprint and a complex structure, and second, have low transfer efficiency, affecting the overall thermoforming efficiency of the equipment. How to set up a double-station plastic thermoforming machine with a simple and efficient loading and unloading mechanism is an urgent problem to be solved. Summary of the Invention

[0004] The object of the present invention is to provide an efficient double-station sheet thermoforming machine to solve the problem in the prior art that the double-station thermoforming machine does not have a simple and efficient feeding and material taking mechanism.

[0005] The technical solution of the present invention is: an efficient double-station sheet thermoforming machine, comprising: a thermoforming device having a first thermoforming device and a second thermoforming device distributed along the Y-axis,

[0006] a feeding mechanism, including a first bin assembly for providing sheets for the first thermoforming device and a second bin assembly for providing sheets for the second thermoforming device;

[0007] a conveying mechanism for conveying the finished products thermoformed on the first thermoforming device and the second thermoforming device in the thermoforming device to the next device; the first bin assembly is located between the first thermoforming device and the conveying mechanism, and the second bin assembly is located between the second thermoforming device and the conveying mechanism.

[0008] a telescopic fork mechanism for feeding the sheets in the feeding mechanism to the first thermoforming device and the second thermoforming device, and discharging the finished products in the first thermoforming device and the second thermoforming device to the conveying mechanism; the telescopic fork mechanism includes a telescopic fork assembly that can be telescopically extended and retracted in both directions along the X-axis, a Z-axis driving mechanism for driving the entire telescopic fork assembly to vertically lift along the Z-axis direction, and a Y-axis driving mechanism for driving the entire Z-axis driving mechanism to reciprocally translate along the Y-axis direction; a suction assembly is provided on the telescopic fork assembly;

[0009] The X-axis is perpendicular to the Y-axis and parallel to the route of the sheets in the first bin assembly moving to the first thermoforming device, and the Y-axis is parallel to the conveying direction of the conveying mechanism.

[0010] Preferably, the telescopic fork assembly includes a fixing plate, a first-stage telescopic plate slidably mounted on the lower end face of the fixing plate, a second-stage telescopic plate slidably mounted on the lower end face of the first-stage telescopic plate, a first telescopic driving assembly, and a second telescopic driving assembly. The length directions of the fixing plate, the first-stage telescopic plate, and the second-stage telescopic plate are all arranged along the X-axis; the first telescopic driving assembly drives the first-stage telescopic plate to reciprocally translate along the X-axis direction relative to the fixing plate, and the second telescopic driving assembly drives the second-stage telescopic plate to reciprocally translate along the X-axis direction relative to the first-stage telescopic plate;

[0011] The suction assembly is mounted on the lower end face of the second-stage telescopic plate.

[0012] Preferably, the fixing plate and the first-stage telescopic plate are slidably assembled through a first linear guide rail module, and the first-stage telescopic plate and the second-stage telescopic plate are slidably assembled through a second linear guide rail module;

[0013] The first telescopic driving assembly includes a driving synchronous pulley, a driven synchronous pulley, a plurality of tensioning pulleys, a double-sided toothed synchronous belt sleeved on the plurality of synchronous pulleys and tensioning pulleys, a first rack fixedly installed on the top surface of the first-stage telescopic plate, and a first driving member for driving the driving synchronous pulley to rotate; the first rack meshes with the double-sided toothed synchronous belt;

[0014] The second telescopic driving assembly includes a first-side driving module for driving the second-stage telescopic plate to move towards the first side in the X-axis direction and a second-side driving module for driving the second-stage telescopic plate to move towards the second side opposite to the first side in the X-axis direction; the first-side driving module includes a first synchronous belt and a first synchronous pulley installed on the first-side end of the first-stage telescopic plate, one end of the first synchronous belt is fixed on the second-side end of the bottom surface of the fixed plate, and after passing around the first synchronous pulley, the other end is fixed on the second-side end of the top surface of the second-stage telescopic plate; the second-side driving module includes a second synchronous belt and a second synchronous pulley installed on the second-side end of the first-stage telescopic plate, one end of the second synchronous belt is fixed on the first-side end of the bottom surface of the fixed plate, and after passing around and meshing with the second synchronous pulley, the other end is fixed on the first-side end of the top surface of the second-stage telescopic plate.

[0015] Preferably, the first linear guide rail module is a first roller linear guide rail, including a plurality of first rollers fixed on the lower end surface of the fixed plate and a pair of parallel first linear guide rails fixed on the top surface of the first-stage telescopic plate; the plurality of first rollers are in sliding fit with the pair of first linear guide rails;

[0016] The second linear guide rail module is a second roller linear guide rail, including a plurality of second rollers fixed on the lower end surface of the first-stage telescopic plate and a pair of parallel second linear guide rails fixed on the top surface of the second-stage telescopic plate; the plurality of second rollers are in sliding fit with the pair of second linear guide rails.

[0017] Preferably, the Z-axis driving mechanism includes a Z-axis driving member installed on the mounting plate and a guiding assembly for guiding the lifting of the telescopic fork mechanism; the telescopic fork mechanism is installed on the movable part of the Z-axis driving member.

[0018] Preferably, the guiding assembly includes a flange-type linear bearing fixed on the mounting plate and a guiding rod sleeved in the flange-type linear bearing; one end of the guiding rod is fixed on the top surface of the fixed plate;

[0019] The fixed plate is fixedly installed on the movable part of the Z-axis driving member.

[0020] Preferably, the Y-axis driving mechanism includes a third linear guide rail module and a second rack both installed on the frame body and arranged along the Y-axis in the length direction, a gear meshing with the second rack, and a second driving member for driving the gear to rotate; the second driving member is installed on the mounting plate;

[0021] The third linear guide rail module includes a plurality of first sliders fixed to the lower end surface of the mounting plate, and a pair of parallel third linear guide rails fixed to the frame body. The plurality of first sliders are slidably engaged with the pair of third linear guide rails.

[0022] Preferably, the first bin assembly and the second bin assembly have the same structure, and both include a bin for placing the stacked plates and a third driving member for driving the bin to lift.

[0023] The conveying mechanism is a belt conveyor line.

[0024] Preferably, the first thermoforming device and the second thermoforming device have the same structure, and both include a pressing frame assembly for pressing and fixing the periphery of the plate. The pressing frame assembly includes a fixed frame, a pressing frame, and a pressing frame driving module for driving the pressing frame to press or separate from the fixed frame.

[0025] The first thermoforming device and the second thermoforming device further include a pressing plate assembly located directly above the pressing frame assembly for pressing the pressing frame. The pressing plate assembly includes a pressing plate and a fourth driving member for driving the pressing plate to lift.

[0026] Preferably, one side of the pressing frame away from the conveying mechanism is hinged to the fixed frame, and the side close to the conveying mechanism is hinged to the pressing frame driving module.

[0027] The pressing frame driving module includes a connecting rod, a transfer plate, and a fifth driving member for driving the transfer plate to lift vertically. One end of the connecting rod is hinged to the pressing frame, and the other end is hinged to the transfer plate. A fourth linear guide rail module is vertically arranged on the fixed frame. The fourth linear guide rail module includes a pair of parallel fourth linear guide rails fixed to the fixed frame and a plurality of second sliders slidably assembled on the fourth linear guide rails. The transfer plate is fixedly installed on the plurality of second sliders.

[0028] Compared with the prior art, the advantages of the present invention are:

[0029] (1) An efficient double-station plate thermoforming machine in the present invention includes: a thermoforming device, a feeding mechanism, a conveying mechanism, a telescopic fork mechanism. The first bin assembly is located between the first thermoforming device and the conveying mechanism, and the second bin assembly is located between the second thermoforming device and the conveying mechanism; the telescopic fork mechanism can cyclically and sequentially pick up and place the plates in the first bin assembly to the first thermoforming station, pick up and place the finished products completed by thermoforming at the second thermoforming station to the conveying mechanism when thermoforming is carried out at the first thermoforming station, pick up and place the plates in the second bin assembly to the second thermoforming station, and pick up and place the finished products completed by thermoforming at the first thermoforming station to the conveying mechanism when thermoforming is carried out at the second thermoforming station; each telescopic plate can telescopically move bidirectionally along the X-axis, cyclically pick up and place the plates and finished products between the two stations, synchronously complete the feeding and discharging actions, shorten the single production cycle, improve the overall production capacity, and greatly improve the thermoforming efficiency of the plates.

[0030] (2) The telescopic fork mechanism in the present invention includes a fixed plate, a first-stage telescopic plate slidably mounted on the lower end face of the fixed plate, and a second-stage telescopic plate slidably mounted on the lower end face of the first-stage telescopic plate. The suction component is mounted on the lower end face of the second-stage telescopic plate. Through the telescoping of each stage of the telescopic plate, the sheet material or finished product is picked up and placed under the lifted pressing frame, overcoming the problem of limited space for picking and placing materials in the prior art. In the telescopic fork structure in the prior art, the number of components is large and the control is complicated. The telescopic fork mechanism in the present invention has a simpler structure and lower equipment cost. Moreover, the second telescopic drive component uses the movement of the first-stage telescopic plate to drive the movement of the second-stage telescopic plate, without the need to additionally set up a drive mechanism, and the structure is simple and ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the drawings and embodiments:

[0032] Figure 1 is a schematic structural diagram of the telescopic fork mechanism described in this embodiment;

[0033] Figure 2 is an enlarged schematic diagram of a part of the telescopic fork mechanism described in this embodiment;

[0034] Figure 3 is another enlarged schematic diagram of a part of the telescopic fork mechanism described in this embodiment;

[0035] Figure 4 is a schematic structural diagram of an efficient double-station sheet thermoforming machine described in this embodiment;

[0036] Figure 5 is a partial schematic structural diagram of an efficient double-station sheet thermoforming machine described in this embodiment;

[0037] Figure 6 is a partial enlarged schematic diagram of an efficient double-station sheet thermoforming machine described in this embodiment;

[0038] Figure 7 In this embodiment, taking Figure 2 the direction as the reference direction, when viewed from right to left, it is a schematic structural diagram of the second telescopic drive component;

[0039] Figure 8 In this embodiment, taking Figure 2 the direction as the reference direction, when viewed from left to right, it is a schematic structural diagram of the second telescopic drive component.

[0040] Wherein: 1. Fixed plate, 2. First telescopic plate, 3. Second telescopic plate, 4. Double-sided toothed synchronous belt, 5. First rack, 6. First motor, 7. Vacuum suction cup assembly, 8. First roller, 9. First linear guide rail, 10. Second linear guide rail, 11. Flange-type linear bearing, 12. Guide rod, 13. Linear servo electric cylinder, 14. Second rack, 15. Gear, 16. Second motor, 17. First slider, 18. Third linear guide rail, 19. First plastic suction device, 20. Second plastic suction device, 21. First bin, 22. Second bin, 23. Belt conveyor line, 24. Telescopic fork mechanism, 25. Mounting plate, 26. Fixed frame, 27. Pressing frame, 28. Connecting rod, 29. Adapter plate, 30. Pressing plate, 31. First synchronous belt, 32. First synchronous pulley, 33. Second synchronous belt, 34. Second synchronous pulley. Detailed implementation manners

[0041] The following combines specific embodiments to further elaborate on the content of the present invention:

[0042] In the description of the invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the invention.

[0043] As Figure 4 shown, a high-efficiency double-station sheet plastic suction machine includes: a plastic suction device, a feeding mechanism, a conveying mechanism, and a telescopic fork mechanism 24; the plastic suction device has a first plastic suction device 19 and a second plastic suction device 20 distributed along the Y-axis. As Figure 5 , Figure 6 shown, the first plastic suction device 19 and the second plastic suction device 20 have the same structure, and both include a pressing frame assembly for pressing and fixing the four sides of the sheet. The pressing frame assembly includes a fixed frame 26, a pressing frame 27, and a pressing frame driving module for driving the pressing frame 27 to press or separate from the fixed frame 26; the first plastic suction device 19 and the second plastic suction device 20 also include a pressing plate assembly located directly above the pressing frame assembly for pressing the pressing frame 27 tightly. As Figure 5 , Figure 6As shown in the figure, the pressing plate assembly includes a pressing plate 30 and a fourth driving member for driving the pressing plate 30 to lift and lower. In this embodiment, the fourth driving member is a cylinder. One side of the pressing frame 27 away from the conveying mechanism is hinged to the fixed frame 26, and the side close to the conveying mechanism is hinged to the pressing frame driving module; the pressing frame driving module includes a connecting rod 27, a transfer plate 29, and a fifth driving member for driving the transfer plate 29 to lift and lower in the vertical direction. The fifth driving member can be a servo electric cylinder; one end of the connecting rod 27 is hinged to the pressing frame 27, and the other end is hinged to the transfer plate 29. A fourth linear guide module is vertically arranged on the fixed frame 26. The fourth linear guide module includes a pair of parallel fourth linear guides fixed to the fixed frame 26 and a plurality of second sliders slidably assembled on the fourth linear guides. The transfer plate 29 is fixedly installed on the plurality of second sliders. The working principle of the pressing plate assembly is as follows: The fifth driving member drives the transfer plate 29 to descend, and then drives the pressing frame 27 to swing downward around the side hinged to the fixed frame 26 to press the four sides of the plate; by driving the transfer plate 29 to descend through the fifth driving member, and then driving the pressing frame 27 to swing upward around the side hinged to the fixed frame 26 to release the four sides of the finished product formed by thermoforming.

[0044] In this embodiment, the pressing frame assembly and the pressing plate assembly in the first thermoforming device 19 are defined as the first pressing frame assembly and the first pressing plate assembly, and the pressing frame assembly and the pressing plate assembly in the second thermoforming device 20 are defined as the second pressing frame assembly and the second pressing plate assembly; a heating module box is arranged between the first thermoforming device 19 and the second thermoforming device 20. The first thermoforming device 19 further includes a first thermoforming mechanism located directly below the first pressing frame assembly and a first heating driving component for driving the first pressing frame assembly to reciprocate between the first thermoforming mechanism and the heating module box. The first heating driving component can be a combination of a cylinder and a linear guide; the second thermoforming device 20 further includes a second thermoforming mechanism located directly below the second pressing frame assembly and a second heating driving component for driving the second pressing frame assembly to reciprocate between the second thermoforming mechanism and the heating module box. The second heating driving component can be a combination of a cylinder and a linear guide; in this embodiment, the structures of the first thermoforming mechanism, the second thermoforming mechanism, the heating module box, the first heating driving component, and the second heating driving component are not shown and are all prior arts.

[0045] The feeding mechanism includes a first bin assembly for supplying plates to the first thermoforming device 19 and a second bin assembly for supplying plates to the second thermoforming device 20; the structures of the first bin assembly and the second bin assembly are the same, and both include a bin for placing stacked plates and a third driving member for driving the bin to lift and lower. The third driving member can be a servo electric cylinder. When the topmost plate is taken away by the vacuum chuck assembly 7, the next plate will be lifted to the picking position by the servo electric cylinder. In this embodiment, the bin in the first bin assembly is defined as the first bin 21, and the bin in the second bin assembly is defined as the second bin 22.

[0046] A conveying mechanism that conveys the finished products formed by the first thermoforming device 19 and the second thermoforming device 20 in the thermoforming equipment to the next device; a first bin assembly is located between the first thermoforming device 19 and the conveying mechanism, and a second bin assembly is located between the second thermoforming device 20 and the conveying mechanism. In this embodiment, the conveying mechanism is a belt conveyor line 23.

[0047] A telescopic fork mechanism 24 is used for feeding the sheets on the feeding mechanism to the first thermoforming device 19 and the second thermoforming device 20, and for discharging the finished products in the first thermoforming device 19 and the second thermoforming device 20 to the conveying mechanism. Further, the telescopic fork mechanism 24 is used to sequentially and cyclically pick up and place the sheets in the first bin assembly to the first thermoforming station, pick up and place the finished products formed at the second thermoforming station during the thermoforming process at the first thermoforming station to the conveying mechanism, pick up and place the sheets in the second bin assembly to the second thermoforming station, and pick up and place the finished products formed at the first thermoforming station during the thermoforming process at the second thermoforming station to the conveying mechanism.

[0048] The telescopic fork mechanism 24 includes a telescopic fork assembly that can be telescopically extended and retracted in both directions along the X-axis, a Z-axis driving mechanism that drives the entire telescopic fork assembly to vertically lift along the Z-axis direction, and a Y-axis driving mechanism that drives the entire Z-axis driving mechanism to reciprocally translate along the Y-axis direction; a suction assembly is provided on the telescopic fork assembly, and the suction assembly is a vacuum suction cup assembly 7; the X-axis is perpendicular to the Y-axis and parallel to the route of the sheet moving from the first bin assembly to the first thermoforming device 19, and the Y-axis is parallel to the conveying direction of the conveying mechanism.

[0049] As Figures 1-3 shown, the telescopic fork assembly includes a fixing plate 1, a first-stage telescopic plate 2 slidably mounted on the lower end face of the fixing plate 1, a second-stage telescopic plate 3 slidably mounted on the lower end face of the first-stage telescopic plate 2, a first telescopic driving component, and a second telescopic driving component. The length directions of the fixing plate 1, the first-stage telescopic plate 2, and the second-stage telescopic plate 3 are all arranged along the X-axis; the first telescopic driving component drives the first-stage telescopic plate 2 to reciprocally translate relative to the fixing plate 1 along the X-axis direction, and the second telescopic driving component drives the second-stage telescopic plate 3 to reciprocally translate relative to the first-stage telescopic plate 2 along the X-axis direction; the suction assembly is mounted on the lower end face of the second-stage telescopic plate 3. The fixing plate 1 and the first-stage telescopic plate 2 are slidably assembled through a first linear guide rail module, and the first-stage telescopic plate 2 and the second-stage telescopic plate 3 are slidably assembled through a second linear guide rail module; the first telescopic driving component includes a driving synchronous pulley, a driven synchronous pulley, and a plurality of tensioning pulleys, a double-sided toothed synchronous belt 4 sleeved on the plurality of synchronous pulleys and tensioning pulleys, a first rack 5 fixedly mounted on the top surface of the first-stage telescopic plate 2, and a first driving member for driving the driving synchronous pulley to rotate. In this embodiment, the first driving member is a first motor 6; the first rack 5 meshes with the double-sided toothed synchronous belt 4; As Figure 1 、 Figure 3 、 Figure 6 、 Figure 8As shown in the figure, the second telescopic driving assembly includes a first-side driving module for driving the secondary telescopic plate to move along the X-axis direction towards the first side, and a second-side driving module for driving the secondary telescopic plate to move along the X-axis direction towards the second side opposite to the first side; the first-side driving module includes a first synchronous belt 31 and a first synchronous belt pulley 32 installed on the first-side end of the primary telescopic plate 2. One end of the first synchronous belt 31 is fixed on the second-side end of the bottom surface of the fixed plate 1. After passing around the first synchronous belt pulley 32, the other end is fixed on the second-side end of the top surface of the secondary telescopic plate 3; the second-side driving module includes a second synchronous belt 33 and a second synchronous belt pulley 34 installed on the second-side end of the primary telescopic plate 2. One end of the second synchronous belt 33 is fixed on the first-side end of the bottom surface of the fixed plate 1. After passing around the second synchronous belt pulley 34 and engaging, the other end is fixed on the first-side end of the top surface of the secondary telescopic plate 3; in this embodiment, please use Figure 4 the direction of Figure 4 as a reference. The first side is the side biased towards the first plastic suction device 19, and the second side is the side biased towards the belt conveyor 23; the second telescopic driving assembly uses the movement of the primary telescopic plate 2 to drive the movement of the secondary telescopic plate 3, without the need to additionally set up a driving mechanism, and the structure is simple and ingenious.

[0050] The working principle of the second telescopic drive assembly is as follows: In the initial state, the telescopic fork picking and placing mechanism is located directly above the first bin 21, and both the first-stage telescopic plate 2 and the second-stage telescopic plate 3 are in a state of overlapping and retracting with the fixed plate 1. When the first telescopic drive assembly drives the first-stage telescopic plate 2 to move and extend towards the side of the first plastic suction device 19, the first synchronous pulley 32 moves towards the side of the first plastic suction device 19 along with the first-stage telescopic plate 2. Then, the first synchronous pulley 32 pulls the second-stage telescopic plate 3 to extend towards the side of the first plastic suction device 19. At the same time, when the second-stage telescopic plate 3 extends towards the side of the first plastic suction device 19, one end of the second synchronous belt 33 fixed to the top surface of the second-stage telescopic plate 3 moves towards the side of the first plastic suction device 19 along with the second-stage telescopic plate 3, giving a pulling force to the second synchronous pulley 34. That is, at this time, the second synchronous belt 33 is also in a tensioned state. When the vacuum suction cup assembly 7 is located directly above the plastic suction product in the first plastic suction device 19, the first-stage telescopic plate 2 and the second-stage telescopic plate 3 stop extending. Then, the first-stage telescopic plate 2 and the second-stage telescopic plate 3 retract. The first telescopic drive assembly drives the first-stage telescopic plate 2 to move and retract away from the side of the first plastic suction device 19. At this time, the second synchronous pulley 34 moves away from the side of the first plastic suction device 19 along with the first-stage telescopic plate 2. Then, the second synchronous pulley 34 pulls the second-stage telescopic plate 3 to retract away from the side of the first plastic suction device 19. At the same time, when the second-stage telescopic plate 3 retracts away from the side of the first plastic suction device 19, one end of the first synchronous belt 31 fixed to the top surface of the second-stage telescopic plate 3 moves away from the side of the first plastic suction device 19 along with the second-stage telescopic plate 3, giving a pulling force to the first synchronous pulley 32. That is, at this time, the first synchronous belt 31 is also in a tensioned state. Then, both the first-stage telescopic plate 2 and the second-stage telescopic plate 3 retract to a state of overlapping and retracting with the fixed plate 1. Subsequently, the first telescopic drive assembly drives the first-stage telescopic plate 2 to move and extend towards the side of the belt conveyor 23. At this time, the second synchronous pulley 34 moves towards the side of the belt conveyor 23 along with the first-stage telescopic plate 2. Then, the second synchronous pulley 34 pulls the second-stage telescopic plate 3 to extend towards the side of the belt conveyor 23. At the same time, when the second-stage telescopic plate 3 extends towards the side of the belt conveyor 23, one end of the first synchronous belt 31 fixed to the top surface of the second-stage telescopic plate 3 moves towards the side of the belt conveyor 23 along with the second-stage telescopic plate 3, giving a pulling force to the first synchronous pulley 32. That is, at this time, the first synchronous belt 31 is also in a tensioned state;When the vacuum suction cup assembly 7 is directly above the belt conveyor 23, the first telescopic plate 2 and the second telescopic plate 3 stop extending and then retract. When the first telescopic drive assembly drives the first telescopic plate 2 to retract away from the belt conveyor 23, the first synchronous pulley 32 moves away from the belt conveyor 23 following the first telescopic plate 2. As a result, the first synchronous pulley 32 pulls the second telescopic plate 3 to retract away from the belt conveyor 23. At the same time, when the second telescopic plate 3 retracts away from the belt conveyor 23, one end of the second synchronous belt 33 fixed to the top surface of the second telescopic plate 3 moves away from the belt conveyor 23 following the second telescopic plate 3, applying a pulling force to the second synchronous pulley 34. That is, at this time, the second synchronous belt 33 is also in a tensioned state and returns to the initial state. At this time, the telescopic fork picking and placing mechanism is directly above the first bin 21, and the first telescopic plate 2 and the second telescopic plate 3 are both in a state of overlapping and retracting with the fixed plate 1.;

[0051] As Figure 3 shown, a notch is provided in the middle of the fixed plate 1 for the double-sided tooth synchronous belt 4 to pass through and mesh with the first rack 5. The section of the double-sided tooth synchronous belt 4 that rotates to the notch and meshes with the first rack 5 is in a horizontal straight line shape: Through the three-level nested design of the fixed plate 1, the first telescopic plate 2, and the second telescopic plate 3, combined with the multi-level drive assemblies (the first telescopic drive assembly and the second telescopic drive assembly) in the X-axis direction, a longer horizontal telescopic stroke can be achieved within a limited space.

[0052] As Figure 3 shown, the first linear guide module is a first roller linear guide, including a plurality of first rollers 8 fixed to the lower end surface of the fixed plate 1 and a pair of parallel first linear guides 9 fixed to the top surface of the first telescopic plate 2. The plurality of first rollers 8 are slidably engaged with the pair of first linear guides 9; the second linear guide module is a second roller linear guide, including a plurality of second rollers fixed to the lower end surface of the first telescopic plate 2 and a pair of parallel second linear guides 10 fixed to the top surface of the second telescopic plate 3. The plurality of second rollers are slidably engaged with the pair of second linear guides 10. The fixed plate 1 and the first telescopic plate 2, and the first telescopic plate 2 and the second telescopic plate 3 are respectively slidably assembled through the first linear guide module and the second linear guide module, reducing the movement friction and ensuring that each hierarchical telescopic plate maintains high precision and stability during translation in the X-axis direction, avoiding offset or jitter during the product picking and placing process.

[0053] As Figure 1 、 Figure 2As shown in the figure, the Z-axis drive mechanism includes a Z-axis drive member installed on the mounting plate and a guiding assembly for guiding the lifting of the telescopic fork mechanism 24. The telescopic fork mechanism 24 is installed on the movable part of the Z-axis drive member. The guiding assembly includes a flange-type linear bearing 11 fixed on the mounting plate and a guiding rod 12 sleeved in the flange-type linear bearing 11. One end of the guiding rod 12 is fixed on the top surface of the fixing plate 1; the fixing plate 1 is fixedly installed on the movable part of the Z-axis drive member. In this embodiment, the Z-axis drive member is a linear servo electric cylinder 13. By using the linear servo electric cylinder 13 as the Z-axis drive member and cooperating with the rigid guiding assembly of the flange-type linear bearing 11 and the guiding rod 12, the telescopic fork mechanism 24 can be accurately positioned in the Z-axis direction, meeting the consistency requirements of the product picking and placing positions of the plastic suction machine.

[0054] As Figure 2 shown, the Y-axis drive mechanism includes a third linear guide module and a second rack 14 installed on the frame body with their length directions all along the Y-axis, a gear 15 meshing with the second rack 14, and a second drive member for driving the gear 15 to rotate. The second drive member is installed on the mounting plate; in this embodiment, the second drive member is a second motor 16; the third linear guide module includes a plurality of first sliders 17 fixed on the lower end surface of the mounting plate and a pair of parallel third linear guides 18 fixed on the frame body. The plurality of first sliders 17 are slidably matched with the pair of third linear guides 18. By using the meshing transmission of the gear 15 and the second rack 14 and cooperating with the closed-loop control of the second motor 16, the repeated positioning accuracy in the Y-axis direction can be achieved, and the meshing transmission rigidity of the rack is better than that of the belt or chain, which is suitable for the high-precision requirements of the loading and unloading trajectory of the plastic suction machine. In this embodiment, the telescopic strokes of the first telescopic plate 2 and the second telescopic plate 3 are limited by a plurality of limit switches.

[0055] The working principle of an efficient double-station sheet plastic suction machine in the present invention is as follows:

[0056] The initial state is: the second plastic suction device 20 is performing plastic suction on the sheet. The specific plastic suction process is as follows: the second heating drive assembly drives the entire second pressing frame assembly in the heating module box to move directly above the second plastic suction forming mechanism. At this time, the sheet heated by the heating module box is pressed in the second pressing frame assembly. Then, the pressing plate 30 of the second pressing plate assembly descends and presses on the pressing frame 27 of the second pressing frame assembly, and the second plastic suction forming mechanism starts to perform plastic suction on the sheet; there is a finished product that has been plastic suctioned and cooled on the first plastic suction device 19. At this time, the pressing plate 30 of the first pressing plate assembly has been lifted, and the pressing frame 27 of the first pressing frame assembly has been lifted; the telescopic fork assembly is directly above the first bin 21, and both the first telescopic plate 2 and the second telescopic plate 3 are in a state of overlapping and retracting with the fixing plate 1.

[0057] Then, start taking the finished products from the first blister device 19. The first telescopic plate 2 and the second telescopic plate 3 extend simultaneously. Specifically, the first motor 6 of the first telescopic drive assembly drives the active synchronous pulley to rotate in the first direction, thereby driving the double-sided tooth synchronous belt 4 sleeved on the active synchronous pulley, the driven synchronous pulley and the tension pulley to rotate clockwise. The double-sided tooth synchronous belt 4 drives the first rack 5 meshed with it to move towards the first blister device 19 side, thereby causing the first telescopic plate 2 to extend towards the first blister device 19 side; at the same time, the second telescopic drive assembly drives the second telescopic plate 3 to extend towards the first blister device 19 side (the telescopic principle of the second telescopic plate 3 has been described above and will not be elaborated here); specifically, the first telescopic plate 2, the second telescopic plate 3, and the vacuum suction cup assembly 7 extend into the lower part of the pressing frame 27 of the lifted first pressing frame assembly; when the vacuum suction cup assembly 7 is directly above the finished product in the first blister device 19, the first telescopic plate 2 and the second telescopic plate 3 stop extending. The linear servo electric cylinder 13 drives the fixed plate 1 to descend, thereby driving the vacuum suction cup assembly 7 to descend to adsorb the finished product. After adsorbing the finished product, the linear servo electric cylinder 13 drives the fixed plate 1 to rise, thereby driving the vacuum suction cup assembly 7 and the finished product to rise; then, the first telescopic plate 2 and the second telescopic plate 3 retract simultaneously. Specifically, the first motor 6 of the first telescopic drive assembly drives the active synchronous pulley to rotate in the reverse direction of the first direction, thereby driving the double-sided tooth synchronous belt 4 sleeved on the active synchronous pulley, the driven synchronous pulley and the tension pulley to rotate counterclockwise. The double-sided tooth synchronous belt 4 drives the first rack 5 meshed with it to move away from the first blister device 19 side, thereby causing the first telescopic plate 2 to retract; at the same time, the second telescopic drive assembly drives the second telescopic plate 3 to retract away from the first blister device 19 side; then both the first telescopic plate 2 and the second telescopic plate 3 retract to the state of overlapping and retracting with the fixed plate 1;

[0058] Subsequently, the first motor 6 continues to drive the active synchronous pulley to rotate in the reverse direction of the first direction, and the double-sided tooth synchronous belt 4 continues to rotate counterclockwise, driving the first rack 5 to move towards the belt conveyor 23 side, thereby causing the first telescopic plate 2 to extend towards the belt conveyor 23 side; the second telescopic drive assembly drives the second telescopic plate 3 to continue to extend towards the belt conveyor 23 side; when the vacuum suction cup assembly 7 carrying the finished product is directly above the belt conveyor 23, the first telescopic plate 2 and the second telescopic plate 3 stop extending. The linear servo electric cylinder 13 drives the fixed plate 1 to descend, thereby driving the finished product to descend, and then the vacuum suction cup assembly 7 releases, placing the finished product on the belt conveyor 23;

[0059] The linear servo electric cylinder 13 drives the fixed plate 1 to rise, thereby driving the vacuum suction cup assembly 7 to rise. Then, the first-stage telescopic plate 2 and the second-stage telescopic plate 3 retract simultaneously. Specifically, the first motor 6 of the first telescopic drive assembly drives the active synchronous pulley to rotate in the first direction, thereby driving the double-sided tooth synchronous belt 4 sleeved on the active synchronous pulley, the driven synchronous pulley, and the tension pulley to rotate clockwise. The double-sided tooth synchronous belt 4 drives the first rack 5 engaged with it to move away from the side of the belt conveyor line 23, thereby causing the first-stage telescopic plate 2 to retract away from the side of the belt conveyor line 23; at the same time, the second telescopic drive assembly drives the second-stage telescopic plate 3 to retract away from the side of the belt conveyor line 23; when both the first-stage telescopic plate 2 and the second-stage telescopic plate 3 retract to the state of overlapping and retracting with the fixed plate 1, the retraction stops;

[0060] The linear servo electric cylinder 13 drives the fixed plate 1 to descend, thereby driving the vacuum suction cup assembly 7 to descend to suck the topmost sheet in the first bin 21. Then, the linear servo electric cylinder 13 drives the fixed plate 1 to rise, thereby driving the vacuum suction cup assembly 7 and the sheet to rise. With the same working principle as described above, the first-stage telescopic plate 2 and the second-stage telescopic plate 3 extend toward the first thermoforming device 19 side, and then place the sheet in the fixed frame 26 of the first thermoforming device 19. The first thermoforming device 19 performs thermoforming on the sheet. The specific thermoforming process is as follows: The pressing frame 27 of the first pressing frame assembly covers the fixed frame 26 to fix the sheet. The first heating drive assembly drives the first pressing frame assembly to move from directly above the first thermoforming mechanism to the heating module box to heat the sheet. After heating is completed, the first heating drive assembly drives the entire first pressing frame assembly in the heating module box to move to directly above the first thermoforming mechanism, and then the pressing plate 30 of the first pressing plate assembly descends and presses on the pressing frame 27 of the first pressing frame assembly, and the second thermoforming mechanism starts to perform thermoforming on the sheet;

[0061] After the telescopic fork mechanism 24 places the sheet in the fixed frame 26 of the first thermoforming device 19, the first-stage telescopic plate 2 and the second-stage telescopic plate 3 retract away from the first thermoforming device 19 side and return to the state where both the first-stage telescopic plate 2 and the second-stage telescopic plate 3 overlap and retract with the fixed plate 1;

[0062] The second motor 16 drives the gear 15 to rotate. Since the second rack 14 is fixed to the frame, it drives the mounting plate 25 to carry the Z-axis drive mechanism and the telescopic fork mechanism 24 to move integrally to directly above the second bin 22. At this time, the second thermoforming device 20 has completed the thermoforming of the sheet; then, with the same working principle as above, the telescopic fork mechanism 24 picks and places the finished product that has been thermoformed in the second thermoforming device 20 onto the belt conveyor line 23, and then picks and places the topmost sheet in the second bin 22 onto the second thermoforming device 20 for thermoforming. Finally, the Y-axis drive mechanism drives the Z-axis drive mechanism and the telescopic fork mechanism 24 to return to directly above the first bin 21 and return to the initial state, and work in this cycle.

[0063] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it should not be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention.

Claims

1. An efficient double-station sheet thermoforming machine, characterized in that, Including: A thermoforming device, having a first thermoforming device and a second thermoforming device distributed along the Y-axis, A feeding mechanism, including a first bin assembly for providing sheets to the first thermoforming device and a second bin assembly for providing sheets to the second thermoforming device; A conveying mechanism for conveying the finished products formed by thermoforming on the first thermoforming device and the second thermoforming device in the thermoforming device to the next device; the first bin assembly is located between the first thermoforming device and the conveying mechanism, and the second bin assembly is located between the second thermoforming device and the conveying mechanism. A telescopic fork mechanism for feeding the sheets on the feeding mechanism to the first thermoforming device and the second thermoforming device, and discharging the finished products in the first thermoforming device and the second thermoforming device to the conveying mechanism; the telescopic fork mechanism includes a telescopic fork assembly that can telescopically move bidirectionally along the X-axis, a Z-axis driving mechanism for driving the entire telescopic fork assembly to vertically lift along the Z-axis direction, and a Y-axis driving mechanism for driving the entire Z-axis driving mechanism to reciprocally translate along the Y-axis direction; a suction assembly is provided on the telescopic fork assembly; The X-axis is perpendicular to the Y-axis and parallel to the route of the sheet moving from the first bin assembly to the first thermoforming device, and the Y-axis is parallel to the conveying direction of the conveying mechanism.

2. An efficient double-station sheet thermoforming machine according to claim 1, characterized in that: The telescopic fork assembly includes a fixed plate, a first telescopic plate slidably installed on the lower end surface of the fixed plate, a second telescopic plate slidably installed on the lower end surface of the first telescopic plate, a first telescopic driving component, and a second telescopic driving component. The length directions of the fixed plate, the first telescopic plate, and the second telescopic plate are all arranged along the X-axis; the first telescopic driving component drives the first telescopic plate to reciprocally translate relative to the fixed plate along the X-axis direction, and the second telescopic driving component drives the second telescopic plate to reciprocally translate relative to the first telescopic plate along the X-axis direction; The suction assembly is installed on the lower end surface of the second telescopic plate.

3. An efficient double-station sheet thermoforming machine according to claim 2, characterized in that: The fixed plate and the first telescopic plate are slidably assembled through a first linear guide module, and the first telescopic plate and the second telescopic plate are slidably assembled through a second linear guide module; The first telescopic driving component includes a driving synchronous pulley, a driven synchronous pulley, and a plurality of tensioning pulleys, a double-sided tooth synchronous belt sleeved on the plurality of synchronous pulleys and tensioning pulleys, a first rack fixedly installed on the top surface of the first telescopic plate, and a first driving member for driving the driving synchronous pulley to rotate; the first rack meshes with the double-sided tooth synchronous belt; The second telescopic driving component includes a first side driving module for driving the second telescopic plate to move along the X-axis to the first side and a second side driving module for driving the second telescopic plate to move along the X-axis to the second side opposite to the first side; the first side driving module includes a first synchronous belt and a first synchronous pulley installed on the first side end of the first telescopic plate. One end of the first synchronous belt is fixed on the second side end of the bottom surface of the fixed plate. After bypassing the first synchronous pulley, the other end is fixed on the second side end of the top surface of the second telescopic plate; the second side driving module includes a second synchronous belt and a second synchronous pulley installed on the second side end of the first telescopic plate. One end of the second synchronous belt is fixed on the first side end of the bottom surface of the fixed plate. After bypassing and meshing with the second synchronous pulley, the other end is fixed on the first side end of the top surface of the second telescopic plate.

4. An efficient double-station sheet thermoforming machine according to claim 3, characterized in that: The first linear guide module is a first roller linear guide, comprising a plurality of first rollers fixed to the lower end surface of the fixed plate, and a pair of first linear guides arranged in parallel fixed to the top surface of the primary telescopic plate, wherein the plurality of first rollers are slidably matched with the pair of first linear guides; The second linear guide module is a second roller linear guide, including a plurality of second rollers fixed on the lower end surface of the first telescopic plate and a pair of parallel second linear guides fixed on the top surface of the second telescopic plate. The plurality of second rollers slide in cooperation with the pair of second linear guides.

5. An efficient double-station sheet thermoforming machine according to claim 2, characterized in that: The Z-axis driving mechanism comprises a Z-axis driving member mounted on a mounting plate and a guide assembly for guiding the lifting and lowering of a telescopic fork mechanism, and the telescopic fork mechanism is mounted on a movable portion of the Z-axis driving member.

6. An efficient double-station sheet thermoforming machine according to claim 5, characterized in that: The guide assembly includes a flange-type linear bearing fixed on the mounting plate, and a guide rod sleeved in the flange-type linear bearing, wherein one end of the guide rod is fixed on the top surface of the fixing plate; The fixed plate is fixedly mounted on the movable part of the Z-axis driving member.

7. An efficient double-station sheet thermoforming machine according to claim 6, characterized in that: The Y-axis driving mechanism comprises a third linear guide rail module mounted on the frame and arranged along the Y-axis in the length direction, a second rack, a gear meshing with the second rack, and a second driving member driving the gear to rotate, wherein the second driving member is mounted on the mounting plate; The third linear guide rail module comprises a plurality of first slide blocks fixed on the lower end surface of the mounting plate and a pair of third linear guide rails fixed on the frame body and arranged in parallel. The plurality of first slide blocks are slidably matched with the pair of third linear guide rails.

8. An efficient double-station sheet thermoforming machine according to claim 1, characterized in that: The first silo assembly has the same structure as the second silo assembly, both comprising a silo for placing stacked plates and a third driving member for driving the silo to rise and fall; The conveying mechanism is a belt conveyor line.

9. An efficient double-station sheet thermoforming machine according to claim 1, characterized in that: The first blister device and the second blister device have the same structure, both comprising a pressing frame assembly for pressing the four sides of the plate, the pressing frame assembly comprising a fixed frame, a pressing frame, and a pressing frame driving module for driving the pressing frame to press or leave the fixed frame; The first and second blister devices further include a pressing plate assembly located just above the pressing frame assembly to press the pressing frame, and the pressing plate assembly includes a pressing plate and a fourth driving member for driving the pressing plate to rise and fall.

10. An efficient double-station sheet thermoforming machine according to claim 9, characterized in that: The side of the pressing frame away from the conveying mechanism is hinged on the fixed frame, and the side close to the conveying mechanism is hinged on the pressing frame driving module; The pressing frame driving module includes a connecting rod, an adapter plate, and a fifth driving member that drives the adapter plate to rise and fall in a vertical direction. One end of the connecting rod is hinged on the pressing frame, and the other end is hinged on the adapter plate. A fourth linear guide module is vertically arranged on the fixed frame. The fourth linear guide module includes a pair of fourth linear guides arranged in parallel and fixed on the fixed frame, and a plurality of second sliders slidably assembled on the fourth linear guides. The adapter plate is fixedly mounted on the plurality of second sliders.

Images