A plastic thermoforming machine

Abstract

The application relates to the field of thermoforming machines, in particular to a plastic thermoforming machine which comprises a linear conveying device for conveying a plastic sheet, a heating assembly, a forming assembly and a cutting assembly which are sequentially arranged along the conveying direction of the linear conveying device, the heating assembly comprises a plurality of upper heating rollers and a plurality of lower heating rollers, the forming assembly comprises an upper die, a lower die and a first driving mechanism for driving the upper die and the lower die to move close to or away from each other, and the cutting assembly comprises an upper ring cutter, a lower ring cutter and a second driving mechanism for driving the upper ring cutter and the lower ring cutter to move close to or away from each other. The application has the effects of improving production efficiency, reducing production cost and saving manpower and material resources.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermoforming machines, in particular to a plastic thermoforming machine. BACKGROUND

[0002] Various plastic products can be seen or used in people's life, such as the housings of household appliances, various plastic containers and packaging materials, etc., wherein the plastic containers and packaging materials are mostly made by hollow blow molding or vacuum forming method, and the plastic products such as housings are usually made by injection molding machine or hot press forming machine.

[0003] After searching, the Chinese invention patent with application number CN200510033083.5 discloses a plastic air pressure thermoforming machine, and its technical points are as follows: the thermoforming machine has a frame, a horizontally arranged fixed window in the middle of the frame, an adjustable window size movable window arranged above the fixed window, a tablet pressing frame arranged above the movable window and movable up and down, which is connected with a second pneumatic mechanism, an upper workbench arranged above the tablet pressing frame and movable up and down, which is connected with a hydraulic mechanism, a lower workbench arranged below the fixed window and movable up and down, which is connected with a first pneumatic mechanism, a mold arranged on the upper part of the lower workbench, a movable force bearing trolley arranged outside the lower workbench and connected with a third pneumatic mechanism, and an upper hot furnace and a lower hot furnace arranged on the rear side of the frame and movable forward, which are connected with a fourth pneumatic mechanism.

[0004] For the related technology in the above, the present inventor believes that the processing method in the foregoing scheme needs to use multiple groups of cylinders, and only one sheet can be processed at a time, which needs to consume a lot of manpower and material resources for feeding and discharging work, and the production efficiency is low. SUMMARY

[0005] In order to improve production efficiency, reduce production cost and save manpower and material resources, the present application provides a plastic thermoforming machine.

[0006] The plastic thermoforming machine provided by the present application adopts the following technical scheme:

[0007] A plastic thermoforming machine, comprising a linear conveying device for conveying plastic sheets, a heating assembly, a forming assembly and a cutting assembly arranged in sequence along the conveying direction of the linear conveying device, the heating assembly comprising a plurality of upper heating rollers and a plurality of lower heating rollers, the forming assembly comprising an upper mold, a lower mold and a first driving mechanism for driving the upper mold and the lower mold to approach or move away from each other, and the cutting assembly comprising an upper ring cutter, a lower ring cutter and a second driving mechanism for driving the upper ring cutter and the lower ring cutter to approach or move away from each other.

[0008] Preferably, the linear conveying device comprises two sets of conveying mechanisms arranged symmetrically, a transmission mechanism for driving the two sets of conveying mechanisms to operate synchronously, the conveying mechanism comprises a mounting shell linearly extending in horizontal direction, a long worm rotatably connected in the mounting shell and arranged along the length direction of the mounting shell, a plurality of upper rotating shafts rotatably connected in the mounting shell and located above the long worm, a plurality of lower rotating shafts rotatably connected in the mounting shell and located below the long worm, a plurality of upper worm gears fixedly connected to the upper rotating shafts one by one and engaged with the long worm, a plurality of lower worm gears fixedly connected to the lower rotating shafts one by one and engaged with the long worm, a plurality of upper support wheels fixedly connected to the upper rotating shafts one by one and located outside the mounting shell, and a plurality of lower support wheels fixedly connected to the lower rotating shafts one by one and located outside the mounting shell.

[0009] Preferably, the transmission mechanism comprises a transmission shell fixedly connected to one end of the mounting shell on both sides respectively, a transmission shaft rotatably connected in the transmission shell, a first bevel gear coaxially fixedly connected to both ends of the transmission shaft respectively, a second bevel gear coaxially fixedly connected to the end of the long worm, and a driving motor fixedly mounted at the end of the transmission shell and connected to the transmission shaft, one end of the long worm extends into the transmission shell and makes the second bevel gear correspondingly engaged with the first bevel gear.

[0010] Preferably, the upper heating roller is connected to the upper rotating shaft in the two sets of conveying mechanisms at both ends respectively, and the lower heating roller is connected to the lower rotating shaft in the two sets of conveying mechanisms at both ends respectively.

[0011] Preferably, the first driving mechanism is symmetrically provided with two sets on the mounting shells on both sides, the first driving mechanism comprises a connecting shaft rotatably supported on the side wall of the mounting shell away from the upper support wheel through a shaft seat, a first worm coaxially fixedly connected to the connecting shaft, an upper mounting plate and a lower mounting plate located on both sides of the linear conveying device, two sets of first driving members symmetrically arranged on both sides of the connecting shaft, the first driving member comprises a first worm gear rotatably connected to the side wall of the mounting shell and engaged with the first worm, a first cam coaxially fixedly connected to the first worm gear, a first T-shaped groove opened in the peripheral wall of the first cam and extending around it, a first fixed rod fixedly mounted on the bottom surface of the upper mounting plate or the top surface of the lower mounting plate and extending into the first T-shaped groove, and a first abutting wheel fixedly mounted on the bottom of the first fixed rod and clamped in the first T-shaped groove, the upper die is fixedly mounted on the bottom surface of the upper mounting plate, the lower die is fixedly mounted on the top surface of the lower mounting plate, the mounting shells on both sides are fixedly connected with first guide sleeves respectively, the bottom surface of the upper mounting plate is fixedly connected with a plurality of first mounting rods slidably connected in the first guide sleeves, and the top surface of the lower mounting plate is fixedly connected with a plurality of second mounting rods slidably connected in the first guide sleeves.

[0012] Preferably, the first mounting rod and the second mounting rod are one-to-one corresponding, and the corresponding first mounting rod and the second mounting rod are slidingly connected in the same first guide sleeve, the opposite side walls of the first mounting rod and the second mounting rod are provided in the form of a rack, and the first guide sleeve is rotatably connected with a first transmission gear, and the two sides of the first transmission gear are respectively engaged with the first mounting rod and the second mounting rod.

[0013] Preferably, one end of the long worm away from the transmission mechanism extends to the end of the mounting shell, and the long worm is coaxially fixedly connected with a driving sprocket at one end, and the connecting shaft is coaxially fixedly connected with a driven sprocket at one end, and the driving sprocket and the driven sprocket are sleeved with a transmission chain.

[0014] Preferably, the upper mounting plate is provided with an upper pressing ring sleeved on the upper die, and a plurality of springs are fixedly connected between the bottom surface of the upper mounting plate and the top surface of the upper pressing ring, and the lower mounting plate is provided with a lower pressing ring sleeved on the lower die, and a plurality of springs are fixedly connected between the bottom surface of the lower mounting plate and the top surface of the lower pressing ring.

[0015] Preferably, the second drive mechanism is symmetrically provided with two groups on the mounting shells on both sides, the second drive mechanism comprises a second worm coaxially fixedly connected with the connecting shaft, upper and lower support plates located on the upper and lower sides of the linear conveying device, and two groups of second driving members symmetrically arranged on both sides of the connecting shaft, the second driving member comprises a second worm gear rotatably connected with the side wall of the mounting shell and engaged with the second worm, a second cam coaxially fixedly connected with the second worm gear, a second T-shaped groove opened in the peripheral wall of the second cam and extending around it, a second fixed rod fixedly installed on the bottom surface of the upper support plate or the top surface of the lower support plate and extending into the second T-shaped groove, and a second abutting wheel fixedly installed on the bottom of the second fixed rod and clamped in the second T-shaped groove, the upper ring cutter is fixedly installed on the bottom surface of the upper support plate, the lower ring cutter is fixedly installed on the top surface of the lower support plate, and the lower support plate is provided with a discharging groove located on the inner side of the lower ring cutter, and the mounting shells on both sides are respectively fixedly connected with second guide sleeves, the bottom surface of the upper support plate is fixedly connected with a plurality of first support rods slidingly connected in the second guide sleeves, and the top surface of the lower support plate is fixedly connected with a plurality of second support rods slidingly connected in the second guide sleeves.

[0016] Preferably, the first support rod and the second support rod are one-to-one corresponding, and the corresponding first support rod and the second support rod are slidingly connected in the same second guide sleeve, the opposite side walls of the first support rod and the second support rod are provided in the form of a rack, and the second guide sleeve is rotatably connected with a first transmission gear, and the two sides of the first transmission gear are respectively engaged with the first support rod and the second support rod.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. In the cooperation of the linear conveying device, the heating assembly, the forming assembly and the cutting assembly, when the sheet is hot formed, the sheet is sent from one end of the linear conveying device close to the heating assembly, and the sheet is preheated by the upper heating roller and the lower heating roller, so that the sheet is heated to a certain temperature, and the heated sheet is conveyed between the upper die and the lower die by the traction of the upper supporting wheel and the lower supporting wheel, and the upper die and the lower die are pressed to form the sheet under the action of the first driving mechanism, after the sheet is formed, the formed part is conveyed between the upper ring cutter and the lower ring cutter by the traction of the upper supporting wheel and the lower supporting wheel, and the upper ring cutter and the lower ring cutter are relatively moved under the action of the second driving mechanism to cut the formed part of the sheet, and the sheet is discharged through the discharge chute to complete the hot forming process of the sheet. In the foregoing scheme, the sheet can be continuously processed, greatly reducing the manual feeding and discharging work, and improving the production efficiency;

[0019] 2. By setting the transmission mechanism and the two sets of conveying mechanisms in cooperation, when the driving motor operates, the transmission shaft is driven to rotate, and under the cooperation of the two sets of first bevel gears and second bevel gears, the long worms in the two sets of conveying mechanisms are synchronously rotated, and under the cooperation of the long worms and the upper worm gears and the lower worm gears, the upper supporting wheel and the lower supporting wheel are synchronously and reversely rotated, so that the sheet can be stably pulled and conveyed stably;

[0020] 3. By setting the first driving mechanism, under the cooperation of the connecting shaft, the first worm and the two sets of first driving pieces, when the long worm rotates, the connecting shaft is synchronously rotated through the cooperation of the driving sprocket, the driven sprocket and the transmission connection, and the two sets of first driving pieces on the upper and lower sides are synchronously rotated, when the first worm rotates, the first cam coaxially fixedly connected to the first worm is rotated, and the upper mounting plate and the lower mounting plate are relatively close to or away from each other through the cooperation of the first fixed rod and the first abutting wheel, and the upper die and the lower die fixedly installed on the upper mounting plate and the lower mounting plate are relatively close to or away from each other reciprocating movement, so as to continuously stamp the sheet;

[0021] 4. The first mounting rod and the second mounting rod are respectively arranged on the upper mounting plate and the lower mounting plate and are respectively slidably connected in the first guide sleeve, so as to limit the movement of the upper mounting plate and the lower mounting plate, reduce the deflection of the upper mounting plate and the lower mounting plate, and make the upper mounting plate and the lower mounting plate more stable when relatively moving through the connection of the first transmission gear;

[0022] 5. By setting the upper and lower pressing rings, when the upper and lower molds move relatively and stamp the sheet, the upper and lower pressing rings pre-press the sheet, reducing the situation that the sheet deviates when the upper and lower molds exert pressure on the sheet;

[0023] 6. By setting the second driving mechanism, under the cooperation of the connecting shaft, the second worm and the two groups of second driving members, and making the second worm rotate synchronously in the two groups of second driving members on the upper and lower sides, and making the second cam coaxially fixedly connected to the second worm rotate, and through the cooperation of the second fixed rod and the second abutting wheel, the upper support plate and the lower support plate are made to approach or move away from each other, and the upper ring cutter and the lower ring cutter fixedly installed on the upper support plate and the lower support plate respectively are made to approach or move away from each other reciprocating, thereby continuously cutting and blanking the sheet;

[0024] 7. The first support rod and the second support rod are respectively arranged on the upper support plate and the lower support plate, and are respectively slidably connected in the second guide sleeve, thereby limiting the movement of the upper support plate and the lower support plate, reducing the situation that the upper support plate and the lower support plate deviate, and through the connection of the second transmission gear, the upper support plate and the lower support plate are more stable when moving relatively. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the overall structure schematic diagram of the embodiment.

[0026] Figure 2 is the sectional view of the forming assembly part in the embodiment.

[0027] Figure 3 is Figure 2 is the local enlarged view of part A in the embodiment.

[0028] Figure 4 is the sectional view of the transmission mechanism part in the embodiment.

[0029] Figure 5 is the sectional view of the long worm and the connecting shaft transmission part in the embodiment.

[0030] Figure 6 is the sectional view of the first mounting rod and the second mounting rod transmission part in the embodiment.

[0031] Figure 7 is the sectional view of the cutting assembly part in the embodiment.

[0032] Figure 8 is Figure 7 is the local enlarged view of part B in the embodiment.

[0033] Figure 9 is the sectional view of the first support rod and the second support rod transmission part in the embodiment.

[0034] Explanation of reference signs: 1, linear conveying device; 2, heating assembly; 3, forming assembly; 4, cutting assembly; 5, conveying mechanism; 6, transmission mechanism; 7, mounting shell; 8, long worm; 9, upper rotating shaft; 10, lower rotating shaft; 11, upper worm gear; 12, lower worm gear; 13, upper support wheel; 14, lower support wheel; 15, transmission shell; 16, transmission shaft; 17, first bevel gear; 18, second bevel gear; 19, driving motor; 20, upper heating roller; 21, lower heating roller; 22, upper mold; 23, lower mold; 24, first driving mechanism; 25, shaft seat; 26, connecting shaft; 27, first worm; 28, upper mounting plate; 29, lower mounting plate; 30, first driving piece; 31, driving sprocket; 32, driven sprocket; 33, transmission chain; 34, first worm gear; 35, first cam; 36, first T-shaped groove; 37, first fixed rod; 38, first abutting wheel; 39, first guide sleeve; 40, first mounting rod; 41, second mounting rod; 42, first transmission gear; 43, upper compression ring; 44, lower compression ring; 45, spring; 46, upper ring cutter; 47, lower ring cutter; 48, second driving mechanism; 49, second worm; 50, upper support plate; 51, lower support plate; 52, second worm gear; 53, second cam; 54, second T-shaped groove; 55, second fixed rod; 56, second abutting wheel; 57, blanking groove; 58, second guide sleeve; 59, first support rod; 60, second support rod; 61, second transmission gear; 62, second driving piece. DETAILED DESCRIPTION

[0035] The following will be described in detail with reference to the accompanying drawings. Figures 1-9 The application is further described in detail.

[0036] The application discloses a plastic thermoforming machine. Figures 1-9 The plastic thermoforming machine comprises a linear conveying device 1, a heating assembly 2, a forming assembly 3 and a cutting assembly 4, the linear conveying device 1 is used for conveying a plastic sheet, the heating assembly 2, the forming assembly 3 and the cutting assembly 4 are sequentially arranged along the conveying direction of the linear conveying device 1, and are used for sequentially heating, forming and cutting the sheet in conveying.

[0037] The linear conveying device 1 comprises two sets of conveying mechanisms 5 arranged symmetrically, a transmission mechanism 6 for driving the two sets of conveying mechanisms 5 to operate synchronously, the transmission mechanism 6 is arranged at one end of the two sets of conveying mechanisms 5, the conveying mechanism 5 comprises a mounting shell 7 extending linearly in the horizontal direction, a long worm 8 rotatably connected in the mounting shell 7 and arranged along the length direction of the mounting shell 7, a plurality of upper rotating shafts 9 rotatably connected in the mounting shell 7 and located above the long worm 8, a plurality of lower rotating shafts 10 rotatably connected in the mounting shell 7 and located below the long worm 8, a plurality of upper worm gears 11 fixedly connected to the upper rotating shafts 9 one by one and engaged with the long worm 8, a plurality of lower worm gears 12 fixedly connected to the lower rotating shafts 10 one by one and engaged with the long worm 8, a plurality of upper support wheels 13 fixedly connected to the upper rotating shafts 9 one by one and located outside the mounting shell 7, and a plurality of lower support wheels 14 fixedly connected to the lower rotating shafts 10 one by one and located outside the mounting shell 7.

[0038] The upper rotating shafts 9 and the lower rotating shafts 10 are both perpendicular to the long worm 8 and arranged horizontally, the plurality of upper rotating shafts 9 and the plurality of lower rotating shafts 10 are one by one corresponding in the vertical direction, one end of the upper rotating shafts 9 and the lower rotating shafts 10 is located in the inner wall of the mounting shell 7 and the other end extends to the outside of the mounting shell 7, one end of the upper rotating shafts 9 located in the mounting shell 7 is connected with the upper worm gears 11 for connecting the long worm 8 and making the upper rotating shafts 9 powered, one end of the lower rotating shafts 10 located in the mounting shell 7 is connected with the lower worm gears 12 for connecting the long worm 8 and making the lower rotating shafts 10 powered, the upper support wheels 13 are connected to one end of the upper rotating shafts 9 located outside the mounting shell 7, the lower support wheels 14 are connected to one end of the lower rotating shafts 10 located outside the mounting shell 7, and the number of the upper rotating shafts 9 is more than the number of the upper support wheels 13, and the number of the lower rotating shafts 10 is more than the number of the lower support wheels 14, and the plurality of upper rotating shafts 9 and the plurality of lower rotating shafts 10 are used for mounting the heating assembly 2.

[0039] The transmission mechanism 6 comprises a transmission shell 15 fixedly connected to one end of the mounting shell 7 on both sides, a transmission shaft 16 rotatably connected in the transmission shell 15, a first bevel gear 17 coaxially fixedly connected to both ends of the transmission shaft 16, a second bevel gear 18 coaxially fixedly connected to the end of the long worm 8, a driving motor 19 fixedly installed at the end of the transmission shell 15 and connected to the transmission shaft 16, and the long worm 8 extends into the transmission shell 15 at one end and makes the second bevel gear 18 correspondingly engaged with the first bevel gear 17.

[0040] When the driving motor 19 operates, the transmission shaft 16 is driven to rotate, and under the cooperation of the two sets of first bevel gears 17 and second bevel gears 18, the long worms 8 in the two sets of conveying mechanisms 5 rotate synchronously, and under the cooperation of the long worms 8 and the upper worm gears 11 and the lower worm gears 12, the upper support wheels 13 and the lower support wheels 14 make synchronous reverse rotation movement, so that the sheet material can be stably pulled and conveyed stably.

[0041] The heating assembly 2 comprises a plurality of upper heating rollers 20 and a plurality of lower heating rollers 21, the upper heating rollers 20 and the lower heating rollers 21 correspond to each other in the vertical direction, the two ends of the upper heating rollers 20 are respectively connected to the upper rotating shafts 9 in the two groups of conveying mechanisms 5, and the two ends of the lower heating rollers 21 are respectively connected to the lower rotating shafts 10 in the two groups of conveying mechanisms 5, so that the upper heating rollers 20 and the lower heating rollers 21 can be powered to be able to pull the sheet material.

[0042] The forming assembly 3 comprises an upper mold 22, a lower mold 23, a first driving mechanism 24 for driving the upper mold 22 and the lower mold 23 to move close to or away from each other, the first driving mechanism 24 is symmetrically provided with two groups on the two sides of the mounting shell 7, the first driving mechanism 24 comprises a connecting shaft 26 rotatably supported on the side wall of the mounting shell 7 away from the upper supporting wheel 13 through a shaft seat 25, a first worm 27 coaxially fixedly connected to the connecting shaft 26, an upper mounting plate 28 and a lower mounting plate 29 located on the upper and lower sides of the linear conveying device 1, and two groups of first driving members 30 symmetrically arranged on the two sides of the connecting shaft 26.

[0043] The connecting shaft 26 is in transmission connection with the long worm 8 in the corresponding mounting shell 7, one end of the long worm 8 away from the driving mechanism 6 extends to the end of the mounting shell 7, the long worm 8 has a driving sprocket 31 coaxially fixedly connected at one end, the connecting shaft 26 has a driven sprocket 32 coaxially fixedly connected at one end, and a transmission chain 33 is sleeved on the driving sprocket 31 and the driven sprocket 32, so that the connecting shaft 26 and the long worm 8 can synchronously rotate.

[0044] The first driving member 30 comprises a first worm wheel 34 rotatably connected to the side wall of the mounting shell 7 and engaged with the first worm 27, a first cam 35 coaxially fixedly connected to the first worm wheel 34, a first T-shaped groove 36 opened in the peripheral wall of the first cam 35 and extending around it, a first fixed rod 37 fixedly installed on the bottom surface of the upper mounting plate 28 or the top surface of the lower mounting plate 29 and extending into the first T-shaped groove 36, and a first abutting wheel 38 fixedly installed at the bottom of the first fixed rod 37 and clamped in the first T-shaped groove 36.

[0045] The upper mold 22 is fixedly installed on the bottom surface of the upper mounting plate 28, the lower mold 23 is fixedly installed on the top surface of the lower mounting plate 29, the first cam 35 is fixedly connected to one side of the first worm wheel 34 close to the mounting shell 7, and the first abutting wheel 38 is symmetrically provided with two on the bottom of the first fixed rod 37 and is respectively clamped on the two sides inside the first T-shaped groove 36.

[0046] In the cooperation of the connecting shaft 26, the first worm 27 and the two groups of first driving members 30, when the long worm 8 rotates, the driving sprocket 31, the driven sprocket 32 and the transmission connection are matched to rotate the connecting shaft 26 synchronously, and the two groups of first driving members 30 on the upper and lower sides rotate synchronously, and when the first worm 34 rotates, the first cam 35 coaxially fixed to the first worm 34 rotates, and through the cooperation of the first fixed rod 37 and the first abutting wheel 38, the upper mounting plate 28 and the lower mounting plate 29 are close to or away from each other, and the upper die 22 and the lower die 23 fixedly installed on the upper mounting plate 28 and the lower mounting plate 29 are reciprocated close to or away from each other, so that the sheet is continuously punched.

[0047] The two first guide sleeves 39 are fixedly connected to the two sides of the mounting shell 7, the first mounting rods 40 slidably connected in the first guide sleeves 39 are fixedly connected to the four corners of the bottom surface of the upper mounting plate 28, the second mounting rods 41 slidably connected in the first guide sleeves 39 are fixedly connected to the four corners of the top surface of the lower mounting plate 29, the four first mounting rods 40 and the four second mounting rods 41 correspond one by one, and the corresponding first mounting rod 40 and the second mounting rod 41 are slidably connected in the same first guide sleeve 39.

[0048] In order to make the relative movement of the upper mounting plate 28 and the lower mounting plate 29 more stable, the opposite side walls of the first mounting rod 40 and the second mounting rod 41 are provided in the form of a rack, and the first transmission gear 42 is rotatably connected in the first guide sleeve 39, and the first transmission gear 42 is engaged with the first mounting rod 40 and the second mounting rod 41 on both sides.

[0049] The first mounting rod 40 and the second mounting rod 41 are slidably connected in the first guide sleeve 39, so as to limit the movement of the upper mounting plate 28 and the lower mounting plate 29, reduce the deflection of the upper mounting plate 28 and the lower mounting plate 29, and make the upper mounting plate 28 and the lower mounting plate 29 more stable in relative movement through the connection of the first transmission gear 42.

[0050] In order to make the sheet more stable during punching forming and not easy to deviate, the upper mounting plate 28 is provided with the upper pressing ring 43 sleeved on the upper die 22, the upper pressing ring 43 is horizontally arranged and the bottom surface thereof is slightly lower than the bottom surface of the upper die 22, a plurality of springs 45 are fixedly connected between the bottom surface of the upper mounting plate 28 and the top surface of the upper pressing ring 43, and the plurality of springs 45 are uniformly arranged around the upper pressing ring 43, the lower mounting plate 29 is provided with the lower pressing ring 44 sleeved on the lower die 23, the lower pressing ring 44 is horizontally arranged and the top surface thereof is slightly higher than the top surface of the lower die 23, a plurality of springs 45 are fixedly connected between the bottom surface of the lower mounting plate 29 and the top surface of the lower pressing ring 44, and the plurality of springs 45 are uniformly arranged around the lower pressing ring 44.

[0051] When the upper die 22 and the lower die 23 relatively move and stamp the sheet material, the upper pressure ring 43 and the lower pressure ring 44 are pre-pressed on the sheet material under cooperation of the upper pressure ring 43 and the lower pressure ring 44, so as to reduce the situation that the sheet material is deviated when the upper die 22 and the lower die 23 apply pressure on the sheet material.

[0052] The cutting assembly 4 comprises the upper ring cutter 46, the lower ring cutter 47, and the second driving mechanism 48 for driving the upper ring cutter 46 and the lower ring cutter 47 to move close to or away from each other. The second driving mechanism 48 is symmetrically provided with two groups on the two sides of the mounting shell 7, and comprises the second worm 49 coaxially fixedly connected to the connecting shaft 26, the upper support plate 50 and the lower support plate 51 located on the upper and lower sides of the linear conveying device 1, and the two groups of second driving members 62 symmetrically provided on the two sides of the connecting shaft 26.

[0053] The second driving member 62 comprises the second worm wheel 52 rotatably connected to the side wall of the mounting shell 7 and engaged with the second worm 49, the second cam 53 coaxially fixedly connected to the second worm wheel 52, the second T-shaped groove 54 opened in the peripheral wall of the second cam 53 and extending around the second cam 53, the second fixed rod 55 fixedly installed on the bottom surface of the upper support plate 50 or the top surface of the lower support plate 51 and extending into the second T-shaped groove 54, and the second abutting wheel 56 fixedly installed on the bottom of the second fixed rod 55 and clamped in the second T-shaped groove 54.

[0054] The upper ring cutter 46 is fixedly installed on the bottom surface of the upper support plate 50, the lower ring cutter 47 is fixedly installed on the top surface of the lower support plate 51, the lower support plate 51 is provided with the discharging groove 57 located on the inner side of the lower ring cutter 47, and the upper ring cutter 46 and the lower ring cutter 47 can be inserted into the inner side of the lower ring cutter 47 when moving close to each other, so as to facilitate discharging of the sheet material. The second cam 53 is fixedly connected to the side of the second worm wheel 52 close to the mounting shell 7, and the second abutting wheel 56 is symmetrically provided with two on the bottom of the second fixed rod 55 and clamped on the two sides inside the second T-shaped groove 54.

[0055] Under cooperation of the connecting shaft 26, the second worm 49 and the two groups of second driving members 62, the second worm wheel 52 in the two groups of second driving members 62 on the upper and lower sides is synchronously rotated, the second cam 53 coaxially fixedly connected to the second worm wheel 52 is rotated, and the upper support plate 50 and the lower support plate 51 are moved close to or away from each other through cooperation of the second fixed rod 55 and the second abutting wheel 56, so that the upper ring cutter 46 and the lower ring cutter 47 fixedly installed on the upper support plate 50 and the lower support plate 51 are moved close to or away from each other for reciprocating movement, and the sheet material is continuously cut and discharged.

[0056] Two second guide sleeves 58 are fixedly connected to the two sides of the mounting shell 7 respectively, four first support rods 59 slidingly connected in the second guide sleeves 58 are fixedly connected to the bottom surface of the upper support plate 50 at four corners respectively, four second support rods 60 slidingly connected in the second guide sleeves 58 are fixedly connected to the top surface of the lower support plate 51 at four corners respectively, the four first support rods 59 and the four second support rods 60 correspond to each other, and the corresponding first support rod 59 and second support rod 60 are slidingly connected in the same second guide sleeve 58.

[0057] To make the relative movement of the upper mounting plate 28 and the lower mounting plate 29 more stable, the opposite side walls of the first support rod 59 and the second support rod 60 are provided in the form of a rack, and a second transmission gear 61 is rotationally connected in the second guide sleeve 58, and the two sides of the second transmission gear 61 are engaged with the first support rod 59 and the second support rod 60 respectively.

[0058] The first support rod 59 and the second support rod 60 are slidingly connected in the second guide sleeve 58 respectively, so as to limit the movement of the upper support plate 50 and the lower support plate 51, reduce the deflection of the upper support plate 50 and the lower support plate 51, and make the upper support plate 50 and the lower support plate 51 more stable during relative movement through the connection of the second transmission gear 61.

[0059] The implementation principle of the plastic thermoforming machine according to the embodiment of the present application is as follows:

[0060] When the sheet is thermoformed, the sheet is fed from one end of the linear conveying device 1 close to the heating assembly 2, and is preheated by the upper heating roller 20 and the lower heating roller 21, so that the sheet is heated to a certain temperature. Under the traction of the upper support wheel 13 and the lower support wheel 14, the heated sheet is conveyed between the upper mold 22 and the lower mold 23. Under the cooperation of the connecting shaft 26, the first worm 27 and the two groups of first driving members 30, when the long worm 8 rotates, the active sprocket 31, the passive sprocket 32 and the transmission connection are cooperated with each other to make the connecting shaft 26 rotate synchronously, and the two groups of first driving members 30 on the upper side and the lower side rotate synchronously, when the first worm wheel 34 rotates, the first cam 35 coaxially fixedly connected to the first worm wheel 34 rotates, and the first fixed rod 37 and the first abutting wheel 38 are cooperated to make the upper mounting plate 28 and the lower mounting plate 29 close to each other, so that the upper mold 22 and the lower mold 23 stamp and form the sheet;

[0061] After the sheet is formed, the formed part is conveyed between the upper ring cutter 46 and the lower ring cutter 47 under the traction of the upper supporting wheel 13 and the lower supporting wheel 14, the cooperation of the connecting shaft 26, the second worm 49 and the two groups of second driving members 62, the synchronous rotation of the two groups of second driving members 62 on the upper and lower sides, the rotation of the second cam 53 coaxially fixedly connected to the second worm 52, and the cooperation of the second fixed rod 55 and the second abutting wheel 56, so that the upper supporting plate 50 and the lower supporting plate 51 are close to or away from each other, and the upper ring cutter 46 and the lower ring cutter 47 fixedly installed on the upper supporting plate 50 and the lower supporting plate 51, respectively, are close to each other, so as to cut the formed part of the sheet, and the sheet is discharged through the discharge slot 57, and the thermoforming process of the sheet is completed. In the foregoing scheme, the sheet can be continuously processed, the manual feeding and discharging work is greatly reduced, and the production efficiency is improved.

[0062] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, and: any equivalent changes made on the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A plastic thermoforming machine characterized by: The application relates to a linear conveying device for conveying plastic sheets, which comprises a linear conveying device (1) for conveying plastic sheets, a heating assembly (2), a forming assembly (3) and a cutting assembly (4) arranged in sequence along the conveying direction of the linear conveying device (1), the heating assembly (2) comprises a plurality of upper heating rollers (20) and a plurality of lower heating rollers (21), the forming assembly (3) comprises an upper die (22), a lower die (23), a first driving mechanism (24) for driving the upper die (22) and the lower die (23) to move close to or away from each other, and the cutting assembly (4) comprises an upper ring cutter (46), a lower ring cutter (47), and a second driving mechanism (48) for driving the upper ring cutter (46) and the lower ring cutter (47) to move close to or away from each other. The linear conveying device (1) comprises two groups of conveying mechanisms (5) arranged symmetrically, a transmission mechanism (6) for driving the two groups of conveying mechanisms (5) to operate synchronously, the conveying mechanism (5) comprises a mounting shell (7) extending linearly in the horizontal direction, a long worm (8) rotatably connected to the mounting shell (7) and arranged along the length direction of the mounting shell (7), a plurality of upper rotating shafts (9) rotatably connected to the mounting shell (7) and arranged above the long worm (8), a plurality of lower rotating shafts (10) rotatably connected to the mounting shell (7) and arranged below the long worm (8), a plurality of upper worm gears (11) fixedly connected to the upper rotating shafts (9) one by one and engaged with the long worm (8), a plurality of lower worm gears (12) fixedly connected to the lower rotating shafts (10) one by one and engaged with the long worm (8), a plurality of upper support wheels (13) fixedly connected to the upper rotating shafts (9) one by one and arranged outside the mounting shell (7), and a plurality of lower support wheels (14) fixedly connected to the lower rotating shafts (10) one by one and arranged outside the mounting shell (7).

2. A plastic thermoforming machine according to claim 1, characterized in that: The transmission mechanism (6) comprises a transmission shell (15) fixedly connected to one end of the mounting shell (7) on both sides, a transmission shaft (16) rotatably connected to the transmission shell (15), a first bevel gear (17) coaxially fixedly connected to both ends of the transmission shaft (16), a second bevel gear (18) coaxially fixedly connected to the end of the long worm (8), a driving motor (19) fixedly installed at the end of the transmission shell (15) and connected to the transmission shaft (16), and the long worm (8) extends into the transmission shell (15) at one end and makes the second bevel gear (18) correspondingly engaged with the first bevel gear (17).

3. A plastic thermoforming machine according to claim 1, characterized in that: The upper heating rollers (20) are connected to the upper rotating shafts (9) in the two groups of conveying mechanisms (5) at both ends respectively, and the lower heating rollers (21) are connected to the lower rotating shafts (10) in the two groups of conveying mechanisms (5) at both ends respectively.

4. A plastic thermoforming machine according to claim 1, characterized in that: The first driving mechanism (24) is symmetrically provided with two groups on both sides of the mounting shell (7), the first driving mechanism (24) comprises a connecting shaft (26) rotatably supported on the side wall of the mounting shell (7) away from the upper supporting wheel (13) through a shaft seat (25), a first worm (27) coaxially fixedly connected to the connecting shaft (26), an upper mounting plate (28) and a lower mounting plate (29) located on the upper and lower sides of the linear conveying device (1), two groups of first driving members (30) symmetrically arranged on both sides of the connecting shaft (26), the first driving member (30) comprises a first worm wheel (34) rotatably connected to the side wall of the mounting shell (7) and engaged with the first worm (27), a first cam (35) coaxially fixedly connected to the first worm wheel (34), a first T-shaped groove (36) opened in the peripheral wall of the first cam (35) and extending around it, a first fixed rod (37) fixedly installed on the bottom surface of the upper mounting plate (28) or the top surface of the lower mounting plate (29) and extending into the first T-shaped groove (36), and a first abutting wheel (38) fixedly installed at the bottom of the first fixed rod (37) and clamped in the first T-shaped groove (36), the upper die (22) is fixedly installed on the bottom surface of the upper mounting plate (28), the lower die (23) is fixedly installed on the top surface of the lower mounting plate (29), and the mounting shell (7) is fixedly connected with a first guide sleeve (39) on both sides, the bottom surface of the upper mounting plate (28) is fixedly connected with a plurality of first mounting rods (40) slidably connected in the first guide sleeve (39), and the top surface of the lower mounting plate (29) is fixedly connected with a plurality of second mounting rods (41) slidably connected in the first guide sleeve (39).

5. A plastic thermoforming machine according to claim 4, characterized in that: The first mounting rod (40) and the second mounting rod (41) correspond one by one, and the corresponding first mounting rod (40) and the second mounting rod (41) are slidably connected in the same first guide sleeve (39), the opposite side walls of the first mounting rod (40) and the second mounting rod (41) are provided in the form of a rack, and a first transmission gear (42) is rotatably connected in the first guide sleeve (39), and the first transmission gear (42) is engaged with the first mounting rod (40) and the second mounting rod (41) on both sides.

6. A plastic thermoforming machine according to claim 4, characterized in that: One end of the long worm (8) away from the transmission mechanism (6) extends to the end of the mounting shell (7), one end of the long worm (8) is coaxially fixedly connected with a driving sprocket (31), one end of the connecting shaft (26) is coaxially fixedly connected with a driven sprocket (32), and the driving sprocket (31) and the driven sprocket (32) are sleeved with a transmission chain (33).

7. A plastic thermoforming machine according to claim 4, characterized in that: The upper installation plate (28) is provided with an upper pressing ring (43) sleeved on the upper die (22), a plurality of springs (45) are fixedly connected between the bottom surface of the upper installation plate (28) and the top surface of the upper pressing ring (43), the lower installation plate (29) is provided with a lower pressing ring (44) sleeved on the lower die (23), and a plurality of springs (45) are fixedly connected between the bottom surface of the lower installation plate (29) and the top surface of the lower pressing ring (44).

8. A plastic thermoforming machine according to claim 4, characterized in that: The second driving mechanism (48) is symmetrically provided with two groups on the installation shell (7) on both sides, the second driving mechanism (48) comprises a second worm (49) coaxially and fixedly connected with the connecting shaft (26), upper and lower support plates (50) and (51) located on the upper and lower sides of the linear conveying device (1), two groups of second driving members (62) symmetrically arranged on both sides of the connecting shaft (26), the second driving member (62) comprises a second worm wheel (52) rotatably connected to the side wall of the installation shell (7) and engaged with the second worm (49), a second cam (53) coaxially and fixedly connected with the second worm wheel (52), a second T-shaped groove (54) opened in the peripheral wall of the second cam (53) and extending around it, a second fixed rod (55) fixedly installed on the bottom surface of the upper support plate (50) or the top surface of the lower support plate (51) and extending into the second T-shaped groove (54), and a second abutting wheel (56) fixedly installed on the bottom of the second fixed rod (55) and clamped in the second T-shaped groove (54), the upper ring cutter (46) is fixedly installed on the bottom surface of the upper support plate (50), the lower ring cutter (47) is fixedly installed on the top surface of the lower support plate (51), and the lower support plate (51) is provided with a discharging groove (57) located on the inner side of the lower ring cutter (47), the installation shell (7) is fixedly connected with a second guide sleeve (58) on both sides, the bottom surface of the upper support plate (50) is fixedly connected with a plurality of first support rods (59) slidably connected in the second guide sleeve (58), and the top surface of the lower support plate (51) is fixedly connected with a plurality of second support rods (60) slidably connected in the second guide sleeve (58).

9. A plastic thermoforming machine according to claim 8, characterized in that: The first support rod (59) and the second support rod (60) correspond one by one, the corresponding first support rod (59) and the second support rod (60) are slidably connected in the same second guide sleeve (58), and the opposite side walls of the first support rod (59) and the second support rod (60) are provided in the form of a rack, and a second transmission gear (61) is rotatably connected in the second guide sleeve (58), and the second transmission gear (61) is engaged with the first support rod (59) and the second support rod (60) on both sides.

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