Liftable heating device with double-layer track
The design of the double-track liftable heating device solves the problems of complex structure and low efficiency of existing heating devices, and realizes rapid switching and synchronous operation between heating and non-heating states, thereby improving work efficiency.
Patent Information
- Application Number
- CN202520446042.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Existing heating devices require additional transport equipment when heating polyurethane sheets, resulting in complex structures, low efficiency, and the inability to perform other operations simultaneously.
A double-track liftable heating device was designed. Through the cooperation of the lifting frame and the push-pull block, the nail frame can be moved and positioned, and can be quickly switched between heating and non-heating states, simplifying the operation process.
It improves work efficiency, reduces waiting time, enables simultaneous operation in both heated and unheated states, and simplifies equipment structure.
Smart Images
Figure CN223644097U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a heating device for heating sheets coated with polyurethane. Background Technology
[0002] For the preparation of ordinary polyurethane flat sheets, polyurethane foam material is generally sprayed onto a core layer such as a sponge board to form a sheet (substrate). This sheet is then heated, hot-pressed, and finally cooled and demolded. For the preparation of polyurethane curved sheets (such as car wheel covers), studs are inserted around the perimeter of a stud frame. The stud frame is heated and hot-pressed along with the substrate. Because the perimeter of the sheet is pulled by the studs, the edges of the substrate cannot shrink inward during hot pressing, thus forming a curved polyurethane sheet (such as a wheel cover).
[0003] In conventional heating devices, the sheets are kept stationary. After one sheet is heated, it is removed for subsequent operations, and then the next sheet to be heated is fed into the heating device. The problem is that additional transport equipment is needed to move the sheets, resulting in a complex overall structure; and other operations cannot be performed simultaneously while the sheets are being heated, leading to low efficiency. Utility Model Content
[0004] The purpose of this invention is to provide a double-track liftable heating device that can switch between heated and unheated states, and can push and pull the nail frame to move, thereby improving work efficiency.
[0005] The double-track liftable heating device has a heating frame 50. On the left and right sides of the heating frame 50, there are left lifting frames 51 and right lifting frames 52 that slide synchronously up and down relative to the heating frame 50. The upper track 53 and the lower track 54 each have two parallel left and right tracks. The left lifting frame 51 is located to the left of the upper left track 531 and the lower left track 541, i.e., on the outside, and is connected to the upper left track 531 and the lower left track 541. The right lifting frame 52 is located to the right of the upper right track 532 and the lower right track 542, i.e., on the outside, and is connected to the upper right track 532 and the lower right track 542. The heating plate 55, fixed on the heating frame 50, is above the upper track and located between the left lifting frame 51 and the right lifting frame 52. A lifting drive device 400 is provided at the top of the heating frame 50 to drive the left lifting frame 51 and the right lifting frame 52 to slide synchronously up and down.
[0006] The aforementioned double-track liftable heating device has an upper slide rail 61 fixed to the left lifting frame 51 or the right lifting frame 52 on the outer side of the upper left track 531 or the outer side of the upper right track 532. The upper slide rail 61 has an upper slider 63, which is connected to an upper linear drive device 600 that drives it to move along the upper slide rail 61. An upper push-pull block 65 is oscillatingly connected to the inner side of the upper slider 63. When the upper push-pull block 65 oscillates to different positions relative to the upper slider 63, it can connect or disconnect from the heating nail frame 3 located on the upper track 53. When the upper push-pull block 65 is connected to the heating nail frame 3, the upper linear drive device 600 is activated, which drives the heating nail frame 3 to move back and forth on the upper track 53 through the upper slider 63 and the upper push-pull block 65.
[0007] The outer side of the lower left track 541 or the outer side of the lower right track 542 has a lower slide rail 62 fixed on the left lifting frame 51 or the right lifting frame 52. The lower slide rail 62 has a lower slider 64. The lower slider 64 is connected to a lower linear drive device 660 that drives it to move along the lower slide rail 62. The inner side of the lower slider 64 is oscillatingly connected to a lower push-pull block 66. When the lower push-pull block 66 oscillates to different positions relative to the lower slider 64, it can connect or disconnect from the hot-pressed nail frame 4 located on the lower track 54. When the lower push-pull block 66 is connected to the hot-pressed nail frame 4, the lower linear drive device 660 is activated, and the hot-pressed nail frame 4 is driven to move back and forth on the lower track through the lower slider 64 and the lower push-pull block 66.
[0008] It has at least two nail frames 100 with the same structure. The nail frames 100 are connected to the lower periphery of the sheet to be formed, or to the lower periphery of the part obtained after the sheet is formed. The nail frame 100 on the upper track 53 is a heating nail frame 3, and the nail frame 100 on the lower track 54 is a hot pressing nail frame 4.
[0009] The aforementioned double-track liftable heating device has grooves extending in the left-right direction at the bottom end of both the upper push-pull block 65 and the lower push-pull block 66. At the rear ends of both the heating nail frame 3 and the hot-pressing nail frame 4, there are upward-extending locking blocks 671 that can extend into the grooves. When the upper push-pull block 65 swings relative to the upper slider 63 until the locking block 671 on the heating nail frame 3 extends into the groove of the upper push-pull block 65, the upper linear drive device 600 drives the upper slider 63 to move, thereby causing the heating nail frame 3 to move back and forth on the upper track 53 via the upper push-pull block 65. When the lower push-pull block 66 swings relative to the lower slider 64 until the locking block 671 on the hot-pressing nail frame 4 extends into the groove of the lower push-pull block 66, the lower linear drive device 660 drives the lower slider 64 to move, thereby causing the hot-pressing nail frame 4 to move back and forth on the lower track 54 via the lower push-pull block 66.
[0010] The aforementioned double-track liftable heating device includes a heating frame positioning device 800 for positioning the heating nail frame 3 on the upper track 53 to prevent the heating nail frame 3 from moving back and forth on the upper track 53, and a heat pressing frame positioning device 880 for positioning the heat pressing nail frame 4 on the lower track 54 to prevent the heat pressing nail frame 4 from moving back and forth on the lower track 54; the heating frame positioning device 800 is arranged on the left lifting frame 51 and the right lifting frame 52, which are opposite to the upper slide rail 61; the heat pressing frame positioning device 880 is arranged on the left lifting frame 51 and the right lifting frame 52, which are opposite to the lower slide rail 62.
[0011] The aforementioned double-track liftable heating device, heating frame positioning device 800 and hot press frame positioning device 880 both include a thrust device and a clamping device. The thrust device includes a thrust rod that moves relative to the nail frame 100 in the left-right direction under the drive of the thrust cylinder. The clamping device includes a rotating sleeve that moves relative to the nail frame 100 in the front-back direction under the drive of the clamping cylinder, and a clamping rod that swings on the rotating sleeve in a plane perpendicular to the front-back direction.
[0012] When the thrust rod and the clamping rod are simultaneously located at the front and rear ends of the nail frame 100, the clamping rod moves toward the thrust rod under the drive of the clamping cylinder, thereby clamping the nail frame 100.
[0013] The aforementioned double-track liftable heating device also has a heat insulation plate 59 fixed on the left lifting frame 51 and the right lifting frame 52. The heat insulation plate 59 is located below the upper track 53 and above the lower track 54.
[0014] The aforementioned double-track liftable heating device has fume hoods fixed to the heating frame 50 at both ends of the heating plate 55. The top of the fume hoods is connected to the exhaust duct connected to the exhaust fan.
[0015] The beneficial effects of this utility model are:
[0016] The double-track liftable heating device 5 is equipped with an upper track and a lower track. When the sheet in the nail frame on the upper track is heated near the heating plate 55 (in the heating state), the lower track, the lifting platform (in other devices) in front of the lower track, and the worktable (in other devices) behind the lower track are at the same height. This allows the hot press nail frame 4 with the cooled and formed part to be moved from the lifting platform to the lower track, or from the lower track to the worktable, thus improving work efficiency.
[0017] When the sheet in the nail frame on the upper track is far away from the heating plate 55 (in the non-heating state), the upper track, the lifting platform in front of the upper track, and the worktable behind the upper track are at the same height. The step of moving the heated nail frame 3 with the heated sheet forward from the upper track to the lifting platform and the step of moving the nail frame on the worktable forward to the upper track can be carried out simultaneously, which also reduces waiting time and improves work efficiency.
[0018] The lifting drive device 400 drives the left lifting frame 51 and the right lifting frame 52 to slide up and down synchronously, enabling the double-track lifting heating device 5 to quickly change between the heating state and the non-heating state.
[0019] The connection or disconnection with the nail frame is achieved by swinging the upper push-pull block 65 relative to the upper slider 63 to different positions, and the connection or disconnection with the hot-press nail frame 4 is achieved by swinging the lower push-pull block 66 relative to the lower slider 64 to different positions. The operation is quick and convenient.
[0020] The heating frame positioning device 800 can fix the heating nail frame 3 on the upper rail during heating and when the upper and lower rails are raised and lowered, preventing it from moving back and forth. The hot pressing frame positioning device 880 can fix the hot pressing nail frame 4 on the lower rail during heating and when the upper and lower rails are raised and lowered, preventing it from moving back and forth. Both the heating frame positioning device 800 and the hot pressing frame positioning device 880 use thrust cylinders, thrust rods, clamping cylinders, rotating sleeves, clamping rods, etc., which can quickly clamp or release the nail frame back and forth. Moreover, when releasing the clamping of the nail frame, it moves away in the back and forth direction of the nail frame, without hindering the back and forth movement of the nail frame.
[0021] The heat insulation plate 59 can isolate the radiative heating of the hot press nail frame 4 on the lower track from the heating plate 55.
[0022] Fume hoods and exhaust ducts can draw away and vent the exhaust gases generated when heating the sheet material, preventing pollution. Attached Figure Description
[0023] Figure 1 , 2 Both 3 and 4 are 3D diagrams of a double-track, liftable heating device;
[0024] Figure 4 , 5 Both 6 are 3D diagrams of the heating plate, heat insulation plate, upper rail, lower rail, etc.
[0025] Figure 7 yes Figure 5 A magnified view of a portion of the image;
[0026] Figure 8 , 9These are all 3D diagrams of the nail frame, upper track, lower track, etc.
[0027] Figure 10 , 11 They are Figure 8 , 9 A magnified view of a portion of the image;
[0028] Figure 12 , 13 14 are both three-dimensional views of the heating plate, the upper linear drive device, the lower linear drive device, etc.
[0029] Figure 15 It is a 3D diagram of the nail frame;
[0030] Figure 16 yes Figure 15 A magnified view of a portion of the image;
[0031] Figure 17 , 18 These are all 3D views of the lower push-pull block, lower linear drive device, etc.
[0032] Figure 19 , 20 They are Figure 17 , 18 A magnified view of a portion of the image.
[0033] In the diagram, nail frame 100, material nail 101, heated nail frame 3, and hot-pressed nail frame 4 are shown.
[0034] Double-layer track liftable heating device 5, heating frame 50, left lifting frame 51, right lifting frame 52, upper track 53, upper left track 531, upper right track 532, lower track 54, lower left track 541, lower right track 542, heating plate 55, heat insulation plate 59.
[0035] Upper slide rail 61, lower slide rail 62, upper slider 63, lower slider 64, upper push-pull block 65, lower push-pull block 66, connecting block 67, locking block 671, recess 672
[0036] Lifting drive unit 400, upper linear drive unit 600, lower linear drive unit 660
[0037] Heating frame positioning device 800, hot press frame positioning device 880.
[0038] Rotating shaft 40, left longitudinal rod 41, right longitudinal rod 42, motor and reducer 43.
[0039] Chain 60, drive sprocket 68, driven sprocket 69,
[0040] Pin 71, rotation limit rod 72, tension spring 73, upper disengagement cylinder 74, lower disengagement cylinder 75
[0041] Smoke extraction device, smoke hood 81, smoke extraction duct 82,
[0042] Thrust device 85, thrust cylinder 851, thrust rod 852, clamping device 87, clamping cylinder 871, rotating sleeve 872, clamping rod 873. Detailed Implementation
[0043] See Figure 1-3 The double-track liftable heating device 5 shown includes a heating frame 50, a left lifting frame 51, a right lifting frame 52, an upper track, a lower track, a heating plate 55, a heat insulation plate 59, an upper slide rail 61, a lower slide rail 62, an upper slider 63, a lower slider 64, a lifting drive device 400, an upper linear drive device 600, a lower linear drive device 660, a smoke exhaust device, a heating frame positioning device 800, and a hot press frame positioning device 880, etc.
[0044] The nail frame 100 has upwardly extending nails 101; each nail 101 is arranged in a quadrilateral shape for inserting into the lower periphery of the sheet to be formed, or the lower periphery of the part obtained after the sheet is formed; the nail frame 100 on the upper track 53 is a heating nail frame 3, and the nail frame 100 on the lower track 54 is a hot pressing nail frame 4.
[0045] The double-track liftable heating device 5 has an upper track and a lower track arranged vertically and capable of synchronous lifting. The upper track supports the heating nail frame 3, and the lower track supports the hot-pressing nail frame 4. A heating plate 55 is located above the upper track. The double-track liftable heating device 5 has two working states: heating state and non-heating state. In the non-heating state, the upper track is flush with the worktable of other devices and is far away from the heating plate 55. In the heating state, the lower track is flush with the worktable and the upper track is close to the heating plate 55, heating the sheet in the heating nail frame 3 on the upper track.
[0046] On the left and right sides of the heating frame 50, there are left lifting frames 51 and right lifting frames 52 that slide up and down relative to the heating frame 50. The upper and lower rails each have two extensions extending in the direction parallel to the front and back movement of the nail frame. The left lifting frame 51 is located to the left of the upper left rail 531 and the lower left rail 541, i.e., on the outside, and is connected to the upper left rail 531 and the lower left rail 541. The right lifting frame 52 is located to the right of the upper right rail 532 and the lower right rail 542, i.e., on the outside, and is connected to the upper right rail 532 and the lower right rail 542. The heating plate 55, fixed on the heating frame 50, is above the upper rail and located between the left lifting frame 51 and the right lifting frame 52. A lifting drive device 400 is provided at the top of the heating frame 50 to drive the left lifting frame 51 and the right lifting frame 52 to slide up and down synchronously.
[0047] The lifting drive device 400 includes a rotating shaft 40 rotatably mounted on the heating frame 50, gears fixed at both ends of the rotating shaft, racks meshing with each gear and respectively fixed on the left longitudinal rod 41 and the right longitudinal rod 42, the left longitudinal rod 41 and the right longitudinal rod 42 respectively fixed on the left lifting frame 51 and the right lifting frame 52, and the rotating shaft 40 is connected to a motor and a reducer 43 that drive it to rotate.
[0048] In the double-track liftable heating device 5, an upper slide rail 61 is fixed on the left lifting frame 51 or the right lifting frame 52 on the outer side of the upper left track 531 (left side) or the outer side of the upper right track 532 (right side). The upper slide rail 61 has an upper slider 63, which is connected to an upper linear drive device 600 that drives it to move along the upper slide rail 61. An upper push-pull block 65 is oscillatingly connected to the inner side of the upper slider 63. When the upper push-pull block 65 oscillates to different positions relative to the upper slider 63, it can connect or disconnect from the heating nail frame 3 on the upper track. When the upper push-pull block 65 is connected to the heating nail frame 3, the upper linear drive device 600 is activated, and the heating nail frame 3 is moved back and forth on the upper track through the upper slider 63 and the upper push-pull block 65.
[0049] The outer side of the lower left track 541 (i.e., the left side) or the outer side of the lower right track 542 (i.e., the right side) has a lower slide rail 62 fixed on the left lifting frame 51 or the right lifting frame 52. The lower slide rail 62 has a lower slider 64, which is connected to a lower linear drive device 660 that drives it to move along the lower slide rail 62. The inner side of the lower slider 64 is oscillatingly connected to a lower push-pull block 66. When the lower push-pull block 66 oscillates to different positions relative to the lower slider 64, it can connect or disconnect from the hot-pressed nail frame 4. When the lower push-pull block 66 is connected to the hot-pressed nail frame 4, the lower linear drive device 660 is activated, which drives the hot-pressed nail frame 4 to move back and forth on the lower track through the lower slider 64 and the lower push-pull block 66.
[0050] The upper linear drive device 600 and the lower linear drive device 660 are chain drive devices with identical structures, both including a chain 60, a drive sprocket 68, and multiple driven sprockets 69. The drive sprocket 68 is connected to the output shaft of the motor that drives it to rotate. In the upper linear drive device 600, an upper slider 63 is fixed to the chain 60, and in the lower linear drive device 660, a lower slider 64 is fixed to the chain 60.
[0051] The upper push-pull block 65 and the lower push-pull block 66 have the same structure, and both of them have grooves extending in the left and right directions at the bottom front end.
[0052] A connecting block 67 is fixed on the right rear end of the nail frame. The connecting block includes an upwardly extending locking block 671 and a recess 672 that opens to the left (inner side) and extends in the vertical direction.
[0053] The upper push-pull block 65 is hinged to the inner side of the upper slide block 63 via a pin 71 at its midpoint in the front-rear direction. A limiting rod 72 is fixed to the front side of the upper push-pull block 65. When there is a tension spring 73 between the upper push-pull block 65 and the upper slide block 63, the front part of the upper push-pull block 65 swings downward around the pin. The upper disengagement cylinder 74 is fixed to the front of the right lifting frame 52. Under the action of the tension spring 73, the limiting rod 72 on the upper push-pull block 65 is in contact with the upper slide block 63. When the upper linear drive device 600 drives the upper slide block 63 and the upper push-pull block 65 to move backward until the upper rear end of the upper push-pull block 65 is vertically opposite to the piston rod of the upper disengagement cylinder 74, the piston rod of the upper disengagement cylinder 74 extends downward, pushing the upper push-pull block 65 to swing around the pin against the tension of the tension spring 73. At this time, the groove at the bottom front end of the upper push-pull block 65 swings upward.
[0054] The connection structure between the lower push-pull block 66 and the lower slider 64 is basically the same as the connection structure between the upper push-pull block 65 and the upper slider 63, and will not be described in detail again. However, the lower disengagement cylinder 75 that drives the lower push-pull block 66 to swing is fixed at the rear of the right lifting frame 52.
[0055] When the locking block 671 on the heated nail frame 3 extends into the groove of the upper push-pull block 65, the upper linear drive device 600 drives the upper slider 63 to move, and the heated nail frame 3 moves back and forth on the upper track through the upper push-pull block 65; when the locking block 671 on the heated nail frame 4 extends into the groove of the lower push-pull block 66, the lower linear drive device 660 drives the lower slider 64 to move, and the heated nail frame 4 moves back and forth on the lower track through the lower push-pull block 66.
[0056] The heating frame positioning device 800 positions the heating nail frame 3 on the upper track to prevent it from moving back and forth. The hot press frame positioning device 880 positions the hot press frame 4 on the lower track to prevent it from moving back and forth. The heating frame positioning device 800 is positioned on the left lifting frame 51 and right lifting frame 52, facing each other to the upper slide rail 61; the hot press frame positioning device 880 is positioned on the left lifting frame 51 and right lifting frame 52, facing each other to the lower slide rail 62.
[0057] The heating frame positioning device 800 and the hot press frame positioning device 880 have the same structure, both including a thrust device 85 and a clamping device 87. The thrust device 85 includes a thrust rod 852 that moves relative to the nail frame in the left-right direction under the drive of a thrust cylinder 851, and the thrust cylinder 851 is fixed on the left lifting frame 51. The clamping device 87 includes a rotating sleeve 872 that moves relative to the nail frame in the front-back direction under the drive of a clamping cylinder 871, and a clamping rod 873 that swings on the rotating sleeve in a plane perpendicular to the front-back direction. The cylinder body of the clamping cylinder 871 is fixed on the left lifting frame.
[0058] The thrust device 85 and clamping device 87 in the heating frame positioning device 800 and the hot press frame positioning device 880 are positioned differently. The thrust device 85 in the heating frame positioning device 800 is located in front of the clamping device 87, while the thrust device 85 in the hot press frame positioning device 880 is located behind the clamping device 87.
[0059] The heat insulation plate 59 is fixed on the left lifting frame 51 and the right lifting frame 52 on both sides respectively. The heat insulation plate 59 is located below the upper track and above the lower track.
[0060] At both ends of the heating plate 55, there are fume hoods 81 fixed to the heating frame 50. The top of the fume hoods is connected to the exhaust duct 82, which is connected to an exhaust fan. The fume hoods 81, the exhaust fan, and the exhaust duct 82 constitute the exhaust device.
[0061] Its working process is as follows: Step a00: When the heating time of the sheet in the heating nail frame 3 located on the upper track is up, the lifting drive device 400 is activated, driving the left lifting frame 51 and the right lifting frame 52 to descend to the non-heating state.
[0062] Step a0: The heating frame positioning device 800 is activated. The thrust cylinder drives the thrust rod to retract from the front end of the heating nail frame 3. The clamping cylinder drives the rotating sleeve to move backward. The clamping rod leaves the rear end of the heating nail frame 3. Then the rotating sleeve rotates, causing the clamping rod to swing outward, that is, the heating nail frame 3 with the heated sheet is released from the upper track, so that the heating nail frame 3 can move back and forth.
[0063] Step a: Includes the following steps: a1: The upper linear drive device 600 is activated, and the upper push-pull block 65 pushes the heating nail frame 3 to move through the locking block 671, pushing the heating nail frame 3 with the heated sheet forward from the upper track to the lifting platform in other devices (at this time, the upper track, the lifting platform in front, and the worktable in the back are at the same height); a2: The upper disengagement cylinder 74 drives the front end of the upper push-pull block 65 to swing upward, and the locking block 671 fixed on the hot press nail frame 4 disengages from the groove of the upper push-pull block 65.
[0064] Step b: Includes the following steps: b1: Push the nail frame on the workbench in other devices forward onto the upper rail of the double-track liftable heating device 5; b2: The heating frame positioning device 800 is activated, the thrust cylinder drives the thrust rod to move to the left to the front end of the heating nail frame 3, the rotating sleeve and clamping rod swing inward, the clamping rod is located near the rear end of the heating nail frame 3, the clamping cylinder drives the rotating sleeve and clamping rod to move forward, the heating nail frame 3 is clamped by the thrust rod and clamping rod, that is, the heating nail frame on the upper rail... 3. Fixed on the upper track to prevent it from moving back and forth; b3: The upper linear drive device 600 is activated, driving the upper push-pull block 65 to move backward. The rear inclined surface of the upper push-pull block 65 contacts the locking block 671 on the heating nail frame 3, causing the upper push-pull block 65 to swing around the pin shaft 71. The front end of the upper push-pull block 65 gradually moves upward until the locking block 671 on the heating nail frame 3 enters the groove of the upper push-pull block 65. Under the action of the tension spring 73, the upper push-pull block 65 is in the state of contact between the rotation limit rod 72 and the upper slider 63.
[0065] Among them, step a1 and step b1 can be performed simultaneously.
[0066] Step c: The lifting drive device 400 is activated, driving the left lifting frame 51 and the right lifting frame 52 to rise to the heating state, and the heating plate 55 heats the sheet in the heating nail frame 3 located on the upper track.
Claims
1. A double-track liftable heating device, having a heating frame (50), characterized in that: The heating frame (50) has a left lifting frame (51) and a right lifting frame (52) that slide synchronously up and down relative to the heating frame (50) on the left and right sides respectively; the upper rail (53) and the lower rail (54) each have two parallel left and right rails; the left lifting frame (51) is located on the left side of the upper left rail (531) and the lower left rail (541), and is connected to the upper left rail (531) and the lower left rail (541); the right lifting frame (52) is located on the right side of the upper right rail (532) and the lower right rail (542), and is connected to the upper right rail (532) and the lower right rail (542); the heating plate (55) fixed on the heating frame (50) is above the upper rail and is located between the left lifting frame (51) and the right lifting frame (52); a lifting drive device (400) is provided at the top of the heating frame (50) to drive the left lifting frame (51) and the right lifting frame (52) to slide synchronously up and down.
2. The double-layer track liftable heating device as described in claim 1, characterized in that: An upper slide rail (61) is fixed on the left lifting frame (51) or the right lifting frame (52) on the outer side of the upper left track (531) or the outer side of the upper right track (532). An upper slide rail (61) has an upper slider (63). The upper slider (63) is connected to an upper linear drive device (600) that drives it to move along the upper slide rail (61). An upper push-pull block (65) is oscillatingly connected to the inner side of the upper slider (63). When the upper push-pull block (65) oscillates to different positions relative to the upper slider (63), it can connect or disconnect from the heating nail frame (3) located on the upper track (53). When the upper push-pull block (65) is connected to the heating nail frame (3), the upper linear drive device (600) is activated, and the heating nail frame (3) is driven to move back and forth on the upper track (53) through the upper slider (63) and the upper push-pull block (65). The outer side of the left lower track (541) or the outer side of the right lower track (542) has a lower slide rail (62) fixed on the left lifting frame (51) or the right lifting frame (52). The lower slide rail (62) has a lower slider (64). The lower slider (64) is connected to a lower linear drive device (660) that drives it to move along the lower slide rail (62). The inner side of the lower slider (64) is oscillatingly connected to a lower push-pull block (66). When the lower push-pull block (66) oscillates to different positions relative to the lower slider (64), it can connect or disconnect from the hot-pressed nail frame (4) located on the lower track (54). When the lower push-pull block (66) is connected to the hot-pressed nail frame (4), the lower linear drive device (660) is activated, and the hot-pressed nail frame (4) is driven to move back and forth on the lower track through the lower slider (64) and the lower push-pull block (66). It has at least two nail frames (100) with the same structure. The nail frames (100) are connected to the lower periphery of the sheet to be formed, or to the lower periphery of the part obtained after the sheet is formed. The nail frame (100) on the upper track (53) is a heating nail frame (3), and the nail frame (100) on the lower track (54) is a hot pressing nail frame (4).
3. The double-layer track liftable heating device as described in claim 2, characterized in that: Both the upper push-pull block (65) and the lower push-pull block (66) have grooves extending in the left and right direction at one bottom end. At the rear ends of the heating nail frame (3) and the hot-pressing nail frame (4), there are upward-extending locking blocks (671) that can fit into the grooves. When the upper push-pull block (65) swings relative to the upper slider (63) until the locking block (671) on the heating nail frame (3) extends into the groove of the upper push-pull block (65), the upper linear drive device (600) drives the upper slider. (63) Move, the upper push-pull block (65) drives the heating nail frame (3) to move back and forth on the upper track (53); when the lower push-pull block (66) swings relative to the lower slider (64) until the locking block (671) on the hot nail frame (4) extends into the groove of the lower push-pull block (66), the lower linear drive device (660) drives the lower slider (64) to move, and the lower push-pull block (66) drives the hot nail frame (4) to move back and forth on the lower track (54).
4. The double-layer track liftable heating device as described in claim 2, characterized in that: The device includes a heating frame positioning device (800) for positioning the heating nail frame (3) on the upper track (53) and preventing the heating nail frame (3) from moving back and forth on the upper track (53), and a hot press frame positioning device (880) for positioning the hot press nail frame (4) on the lower track (54) and preventing the hot press nail frame (4) from moving back and forth on the lower track (54); the heating frame positioning device (800) is arranged on the left lifting frame (51) and the right lifting frame (52) opposite to the upper slide rail (61); the hot press frame positioning device (880) is arranged on the left lifting frame (51) and the right lifting frame (52) opposite to the lower slide rail (62).
5. The double-layer track liftable heating device as described in claim 4, characterized in that: Both the heating frame positioning device (800) and the hot press frame positioning device (880) include a thrust device and a clamping device. The thrust device includes a thrust rod that moves relative to the nail frame (100) in the left-right direction under the drive of the thrust cylinder. The clamping device includes a rotating sleeve that moves relative to the nail frame (100) in the front-back direction under the drive of the clamping cylinder, and a clamping rod that swings on the rotating sleeve in a plane perpendicular to the front-back direction. When the thrust rod and the clamping rod are simultaneously located at the front and rear ends of the nail frame (100), the clamping rod moves toward the thrust rod under the drive of the clamping cylinder, thereby clamping the nail frame (100).
6. The double-layer track liftable heating device as described in claim 1, characterized in that: It also has a heat insulation plate (59) fixed on the left lifting frame (51) and the right lifting frame (52), the heat insulation plate (59) being located below the upper rail (53) and above the lower rail (54).
7. The double-layer track liftable heating device as described in claim 1, characterized in that: in The front and rear ends of the heating plate (55) have fume hoods fixed on the heating frame (50), and the top of the fume hoods is connected to the exhaust channel connected to the exhaust fan.