PET foamed plate splicing device

Abstract

The application discloses a PET foamed plate splicing device and belongs to the technical field of plastic plate splicing. The machine frame is provided with two bearing pallets, and the bearing pallets are provided with pneumatic clamps. The machine frame is provided with a heat-conducting metal strip, and the bearing pallets and the machine frame are provided with a driving mechanism. The splicing joint of the bearing pallet is in a fold line shape, and the splicing joint on the surface of the bearing pallet is arranged in a staggered mode with the splicing joint of the PET foamed plate. After the PET foamed plate is melted, the protruding part is caused by splicing and extrusion, and the consistency of the splicing joint and the initial foamed plate plane is enhanced under the extrusion of the two complete planes of the bottom of the heat-conducting metal strip and the surface of the bearing pallet.

Description

Technical Field

[0001] This invention relates to the field of plastic sheet splicing technology, and more particularly to a PET foam board splicing device. Background Technology

[0002] When using PET foam boards, multiple PET foam boards need to be spliced ​​together to form a single PET foam board of the specified size, according to the specifications. The splicing of PET foam boards mainly uses adhesive bonding and hot-melt welding.

[0003] Currently, when using hot-melt welding for splicing, the joint of the PET foam boards is heated and melted, and the two PET foam boards are pressed together to bond. After the foam boards are remelted, the joint is fluid, and the molten PET material is irregularly squeezed out from the joint during extrusion. This requires trimming around the joint, affecting the integrity of the spliced ​​PET foam boards. Trimming along the length of the PET foam boards also results in a significant loss of weld strength.

[0004] Therefore, it is necessary to develop a PET foam board splicing device to solve the above problems. Summary of the Invention

[0005] This invention provides a PET foam board splicing device to solve the defects in the prior art where molten PET material is irregularly extruded outward from the splicing seam, resulting in poor interface strength, excessive trimming after splicing, and significant loss of welding strength.

[0006] This invention provides a PET foam board splicing device, comprising:

[0007] The supporting mechanism includes two support plates that can be joined on both sides. A pneumatic clamp is provided on the top surface of each support plate. The two support plates are configured to approach each other to bring the PET foam boards they support closer together on the same plane. The heating component includes a heat-conducting metal strip positioned above the seam between the two support plates. The bottom of the heat-conducting metal strip is used to flatten the seam at the joint of the PET foam boards. The sides of the heat-conducting metal strip are used to heat the joint ends of the PET foam boards until they melt. The bottom of the heat-conducting metal strip is heat-insulated, and the heat-conducting metal strip forms a heating contact area on both sides. The seam between the two support plates is zigzag-shaped, and the seams on the surface of the support plates and the seams of the PET foam boards are staggered.

[0008] In a further embodiment, a frame is provided at the bottom of the support tray, the support tray slides via a slide rail provided at the top of the frame, and a support beam is provided at the center of the top of the frame.

[0009] In a further embodiment, driving mechanisms are arranged between the bearing pallets, the driving mechanisms include racks arranged at the bottom of the bearing pallets, the racks of the two bearing pallets are staggered and the teeth are opposite, the bearing pallets are fixedly connected with positioning sleeves used in cooperation with the racks, a gear is arranged at the top inside the rack, the gear is located between the racks of the two bearing pallets, and the racks are engaged with the gear.

[0010] In a further embodiment, an electric push rod is arranged at the top inside the rack, the output end of the electric push rod is fixedly connected with the bottom of any bearing pallet, and the electric push rod is used to control the two bearing pallets to move close to or away from each other.

[0011] In a further embodiment, resistance heating sheets are arranged at both sides of the heat-conducting metal strip, the distance from the bottom of the heat-conducting metal strip to the resistance heating sheet is greater than the distance from both sides of the heat-conducting metal strip to the resistance heating sheet, and the bottom of the heat-conducting metal strip is wrapped with an anti-sticking bottom liner.

[0012] In a further embodiment, when the PET foam board is heated, the gap between the two bearing pallets is greater than the width of the heat-conducting metal strip, the heat-conducting metal strip is located in the gap between the two bearing pallets, and the splicing end of the PET foam board is in contact with the heating contact area of the heat-conducting metal strip.

[0013] In a further embodiment, when the PET foam board is spliced, the heat-conducting metal strip is located outside the gap between the two bearing pallets, and the two bearing pallets are tightly attached to the splicing end of the PET foam board to achieve sufficient contact, and the sum of the melting distances of the PET foam board is less than the width of the bottom of the heat-conducting metal strip.

[0014] In a further embodiment, a heat-insulating lining plate is arranged on the surface of the bearing pallet, the PET foam board is fixed on the surface of the heat-insulating lining plate, a guide rod is fixedly connected to the top of the heat-conducting metal strip, and the guide rod penetrates through the top of the support beam.

[0015] In a further embodiment, a lifting cylinder is fixedly connected to the top of the support beam, the output end of the bottom of the lifting cylinder is fixedly connected with the top of the heat-conducting metal strip, and the lifting cylinder is used to control the height of the heat-conducting metal strip.

[0016] In a further embodiment, one of the bearing pallets is provided with an intermediate plate at the splicing position, which serves as temporary support for the melting of the PET foam board.

[0017] The PET foam board splicing device provided by the application has the following technical effects or advantages:

[0018] The PET foam plate placed on the bearing pallet is heated and melted during the splicing and approaching process by the bearing pallet approaching or moving away synchronously. The splicing joint of the bearing pallet is in the shape of a fold line, and the splicing joint on the surface of the bearing pallet is arranged in a staggered manner with the splicing position of the PET foam plate. The protruding part of the PET foam plate caused by the splicing and extrusion after melting is extruded by the two complete planes of the bottom of the heat-conducting metal strip and the surface of the bearing pallet, so that the consistency of the splicing position and the initial foam plate plane is enhanced. The problem that the strength of the bonding surface is lost due to the trimming of the splicing position after the splicing of the PET foam plate is solved. The joint caused by the splicing position is faded, the integrity of the PET foam plate after splicing is ensured, the trimming of the splicing position of the foam plate is reduced, and the beneficial effects of ensuring the strength of the bonding surface are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort.

[0020] Figure 1 is a three-dimensional schematic view of the PET foam plate splicing device provided by the first embodiment of the present application when the PET foam plate is placed in the PET foam plate splicing device;

[0021] Figure 2 is a three-dimensional schematic view of the PET foam plate splicing device provided by the first embodiment of the present application when the PET foam plate is placed in the PET foam plate splicing device; Figure 1 ;

[0022] Figure 3 is a three-dimensional schematic view of the PET foam plate splicing device provided by the first embodiment of the present application when the PET foam plate is placed in the PET foam plate splicing device; Figure 2 ;

[0023] Figure 4 is a three-dimensional enlarged schematic view of the driving mechanism of the present application;

[0024] Figure 5 is a cross-sectional view of the PET foam plate contact end heating and melting stage of the first embodiment of the present application;

[0025] Figure 6 is a cross-sectional view of the PET foam plate contact end splicing stage of the first embodiment of the present application;

[0026] Figure 7 is a three-dimensional schematic view of the PET foam plate splicing device provided by the second embodiment of the present application when the PET foam plate is placed in the PET foam plate splicing device;

[0027] Figure 8 is a cross-sectional view of the PET foam plate contact end heating and melting stage of the second embodiment of the present application; Figure 1;

[0028] Figure 9 is the cross-sectional view of the PET foaming plate contact end heating and melting stage of the second embodiment of the present application Figure 2 ;

[0029] Figure 10 is the cross-sectional view of the PET foaming plate contact end splicing stage of the second embodiment of the present application.

[0030] Reference signs:

[0031] 1, bearing mechanism; 2, heating part; 3, driving mechanism; 301, rack; 302, positioning sleeve; 303, gear; 4, bearing support plate; 401, heat insulation lining; 5, pneumatic clamp; 6, heat-conducting metal strip; 601, resistance heating sheet; 602, anti-sticking bottom lining; 7, rack; 8, support beam; 9, electric push rod; 10, guide rod; 11, lifting cylinder; 12, intermediate plate. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] As described above, when welding two PET foaming plates, the two PET foaming plates are pressed close to each other for bonding. The splicing part after re-melting has fluidity, and the PET material in the molten state caused by pressing is irregularly extruded out of the splicing seam, which requires trimming the edges of the splicing part, affecting the integrity of the PET foaming plate after splicing, and the trimming range along the length direction of the PET foaming plate is large, which is easy to cause large loss of welding strength and affect the overall strength after welding.

[0034] To address this, the present invention provides a PET foam board splicing device. This device uses a support plate 4 that can move synchronously closer or further apart, allowing the PET foam board placed on it to contact the side of the heat-conducting metal strip 6 in the thickness direction. This reduces the melting area during splicing, allowing direct heating and melting at the contact surface, increasing splicing strength and reducing width loss after remelting. A zigzag splicing seam can be formed at the point where the support plate 4 is pressed together, and the splicing seams on the surface of the support plate 4 and the PET foam board are staggered. The splicing point of the PET foam board is on a seamless, complete plane on the support plate 4. Combined with the compression from the bottom of the heat-conducting metal strip 6, the splicing seam formed after the two spliced ​​PET foam boards are remelted is inconspicuous; there are no additional gaps for the molten PET material to flow, enhancing the integrity of the spliced ​​PET foam board. The foam board is remelted and then extruded for splicing. External extrusion prevents the molten portion from bulging outwards during splicing, reducing the possibility of incomplete welds at the splicing point. Furthermore, the anti-stick backing 602 and the heat-insulating liner 401 on the support tray 4 prevent the adhesive residue generated after the PET foam board remelts from adhering to the surfaces of the support tray 4 and the heat-conducting metal strip 6. The anti-stick backing 602 and the heat-insulating liner 401 form an isolation layer, preventing oxygen in the air from directly contacting the PET material at high temperatures, slowing down the oxidation reaction, and preventing yellowing at the joints.

[0035] The following is combined Figures 1-10 This invention is described in detail.

[0036] First embodiment:

[0037] like Figures 1-6 As shown, the present invention provides a splicing device, particularly a PET foam board splicing device. In this embodiment, the splicing device mainly includes a supporting mechanism 1, a heating component 2, a driving mechanism 3, and a frame 7. Two supporting trays 4 that can move synchronously closer or further apart serve as the basis for placing the PET foam boards to be spliced. To achieve the synchronous movement of the two supporting trays 4, racks 301 are fixedly connected to the bottom of both supporting trays 4. The racks 301 on the two supporting trays 4 are staggered, and the teeth of the mating racks 301 are aligned, forming a gap between the racks 301.

[0038] like Figure 3 and Figure 4As shown in the figure. A rack 7 is arranged at the bottom of the two bearing pallets 4, the rack 7 is provided with sliding rails at the top, for the two bearing pallets 4 to slide, and two gears 303 are arranged inside the top end of the rack 7 along the direction of the gap between the two bearing pallets 4, the two gears are respectively between the two racks 301, and the gears 303 and the racks 301 are meshed with each other, so that one of the bearing pallets 4 moves, the gear 303 is driven by the rack 301 on the moving bearing pallet 4, the gear 303 drives the rack 301 meshed with it on the other bearing pallet 4, and the rack 301 moves the other bearing pallet 4 in the opposite direction of the driven bearing pallet 4, realizing the linkage function between the two bearing pallets 4. Compared with numerical control linkage, the mechanical structure of the gear 303 and the rack 301 cooperates with each other, which is more reliable and stable, and ensures that the two foam boards that need to be spliced can be synchronized and close to each other.

[0039] A positioning sleeve 302 is fixedly connected to the bottom of each bearing pallet 4, and the positioning sleeve 302 at the bottom of each bearing pallet 4 cooperates with the rack 301 at the bottom of the other bearing pallet 4, the rack 301 is inside the positioning sleeve 302, and when the two bearing pallets 4 move close to or away from each other, the rack 301 is inside the positioning sleeve 302, and the positioning sleeve 302 ensures the stability of the movement of the rack 301.

[0040] In order to realize the driving operation of one of the bearing pallets 4, an electric push rod 9 is fixedly connected to the middle of the inside top end of the rack 7, the electric push rod 9 extends and retracts in the direction of the splicing of the PET foam board, the output end of the electric push rod 9 is fixedly connected to the bottom of one of the bearing pallets 4, and is used as a driving force. Figure 1 and Figure 2 As shown in the figure, a heat insulation lining plate 401 is arranged on the top surface of the bearing pallet 4, the heat insulation lining plate 401 is used to protect the bearing pallet 4, and the surface of the heat insulation lining plate 401 is coated with Teflon material, which can prevent sticking after contacting with the molten PET foam board, and can be used as the contact bottom surface of the PET foam board during splicing. An alignment auxiliary rod is arranged on the surface of the heat insulation lining plate 401, which positions the PET foam board placed on the heat insulation lining plate 401, so that the two ends of the two PET foam boards to be spliced are aligned and the splicing surface is parallel.

[0041] The bearing pallet 4 is symmetrically provided with an inverted U-shaped mounting rod with respect to the middle of the rack 7, as shown in the figure. Figures 1-4The installation rod bearing the supporting plate 4 is fixedly connected with a set of pneumatic clamps 5 on the side close to each other, the pneumatic clamps 5 are controlled to move up and down on the clamping plate through a plurality of synchronous micro-actuating cylinders, and the PET foam plate on the supporting plate 4 is fixed. A support beam 8 is arranged in the middle of the rack 7, the length of the support beam 8 is distributed along the joint seam of the PET foam plate, the top of the support beam 8 is fixedly connected with two synchronous lifting cylinders 11 along the length direction, and the output end of the lower end of the lifting cylinder 11 penetrates through the support beam 8. A long strip-shaped heat-conducting metal strip 6 is arranged in the inside of the support beam 8, the bottom of the heat-conducting metal strip 6 completely covers the joint seam of the PET foam plate, and the heat-conducting metal strip 6 can be lifted and lowered in the support beam 8, the output end of the lower end of the lifting cylinder 11 and the top of the heat-conducting metal strip 6 are fixedly connected together, two guide rods 10 are fixedly connected on the surface of the heat-conducting metal strip 6, the top end of the guide rod 10 penetrates through the support beam 8 and extends to the top of the support beam 8, and the lifting of the heat-conducting metal strip 6 is assisted and limited through the guide rod 10.

[0042] In order to splice two PET foam plates to be spliced through the heat-conducting metal strip 6, resistance heating sheets 601 are arranged in the inside of the heat-conducting metal strip 6 towards the two sides of the supporting plate 4. In order to heat the two sides of the heat-conducting metal strip 6 to the PET foam plates to be spliced, so that the splicing end of the PET foam plate realizes fusion splicing. The distance between the two side walls of the heat-conducting metal strip 6 and the resistance heating sheets 601 is 2-4 mm. The bottom of the heat-conducting metal strip 6 can be provided with a heat insulation plate as shown in Figure 5 and Figure 6 The heat-conducting metal strip 6 is used for flattening the spliced PET foam plate and avoiding that the temperature of the bottom of the heat-conducting metal strip 6 is too high when the foam plate is flattened. The area where the two sides of the heat-conducting metal strip 6 contact with the PET foam plate is a heating contact area, and the heating temperature of the heating contact area is 260 DEG C. The splicing surface of the PET foam plate is directly heated and fused through side contact, the fusion width of the complete PET foam plate caused by splicing is reduced, the splicing part of the PET foam plate is extruded and flattened by the bottom of the heat-conducting metal strip 6, and the integrity of the spliced PET foam plate is increased.

[0043] The present application is provided with a PLC numerical control cabinet beside the rack 7, which is used for controlling the extension and retraction of the lifting cylinder 11 and the electric push rod 9, and the heating temperature of the resistance heating sheet 601 in the heat-conducting metal strip 6. The bottom of the heat-conducting metal strip 6 is wrapped with a replaceable anti-sticking bottom liner 602, which covers the bottom and both sides of the heat insulation pad on the heat-conducting metal strip 6. The anti-sticking bottom liner 602 of the present application can be made of Teflon cloth. After the foam board is heated and melted, the anti-sticking bottom liner 602 has a certain adsorption to the PET on the top of the spliced part of the foam board. After the heat-conducting metal strip 6 is pressed down, it further flattens the top spliced part of the foam board. After the PET foam board is heated and melted, it avoids the melted PET foam board from adhering to the surface of the heat-conducting metal strip 6. By pressing the melted spliced part of the PET foam board through the bottom of the heat-conducting metal strip 6 covered with Teflon cloth, the Teflon cloth has good chemical stability and low surface energy, which can form an isolation layer between the spliced part of the PET foam board and the external environment. It prevents oxygen in the air from directly contacting the PET material at high temperature, slows down the oxidation reaction, and avoids the spliced part of the two spliced PET foam boards from turning yellow.

[0044] The spliced end of the PET foam board is pressed against the alignment auxiliary rod on the bearing pallet 4, and the spliced end of the PET foam board exceeds the end of the bearing pallet 4 that is close to each other. The spliced end of the PET foam board extends 1-3 mm from the gap between the two bearing pallets 4, providing redundancy for the loss of heating and melting. First, the electric push rod 9 controls the two bearing pallets 4 to move away from each other until the gap between the two bearing pallets 4 is greater than the width of the heat-conducting metal strip 6. The lifting cylinder 11 controls the heat-conducting metal strip 6 to descend to the heating contact area of the heat-conducting metal strip 6 and the PET foam board to be spliced. As shown in the position, Figure 6 The spliced end of the two PET foam boards contacts the heating contact area of the heat-conducting metal strip 6, and the heat-conducting metal strip 6 is heated to heat and melt the contact end of the PET foam board extending into the gap between the two bearing pallets 4. The heat-conducting metal strip 6 is raised to ensure that the bottom of the heat-conducting metal strip 6 is above the PET foam board. The driving mechanism 3 controls the two bearing pallets 4 to move close to each other until they are pressed tightly. The melted ends of the two PET foam boards contact each other, and the melted PET material fuses. As shown in the position, Figure 6 The lifting cylinder 11 controls the bottom of the heat-conducting metal strip 6 to extrude and flatten the spliced PET foam board at the melting contact position. By heating and melting the PET foam board in the thickness direction, the splicing reduces the volume of the melted PET foam board, reduces the impact of splicing on the PET foam board, and increases the integrity of the spliced PET foam board.

[0045] Second embodiment:

[0046] As Figures 7-10As shown, based on the first embodiment, the splicing joint of the bearing pallet 4 can also be made into a non-vertical splicing joint, including a zigzag shape as shown. Figure 10 One of the bearing pallets 4 is convex at the top near the middle, and at the same time, the top of the splicing joint of the other bearing pallet 4 is concave. The bearing pallet 4 that is convex at the top is called the first bearing pallet, and the bearing pallet 4 that is concave at the top is called the second bearing pallet. The two bearing pallets 4 can be closed after being moved towards each other. In order to avoid the influence of the concave part at the top on the melting of the PET foam board, a liftable intermediate plate 12 is arranged at the concave part at the top of the second bearing pallet. When the intermediate plate 12 is lifted to the highest position, it can be aligned with the top of the bearing pallet 4. When the intermediate plate 12 is lowered to the lowest position, its surface can coincide with the bottom of the convex section of the first bearing pallet. After the two PET foam boards are spliced, the splicing joint is located at the convex position of the top of the first bearing pallet, and the splicing joint of the PET foam board is extruded and flattened on the integrated lining plate, so as to avoid the formation of a joint at the bottom of the splicing joint due to extrusion.

[0047] The two sides of the heat-conducting metal strip 6 are still heating contact areas, and the bottom is covered with a heat insulation layer, which can directly contact the surface of the lining plate and the PET foam board. In specific implementation, first, as shown, Figure 8 two PET foam boards to be spliced are placed on the two bearing pallets 4, and the PET foam boards are tightly attached to the alignment rods of the bearing pallets 4. At this time, the intermediate plate 12 in the concave part of the second bearing pallet is lifted to the surface of the first bearing pallet. The driving mechanism 3 controls the two bearing pallets 4 to move towards each other. Then, as shown, Figure 9 until the intermediate plate 12 contacts the first bearing pallet. Finally, as shown, Figure 10 the intermediate plate 12 is lowered to the surface of the first bearing pallet, and the two bearing pallets 4 are continuously controlled to move towards each other until they are tightly attached. The splicing joint of the two PET foam boards is spliced on a complete and seamless plane of the convex plane of the first bearing pallet, further improving the integrity of the spliced PET foam board.

[0048] The PLC control system for controlling the air cylinder and the telescopic rod in the device is prior art, which is common knowledge in the field and does not belong to the improvement of the present case, and will not be described here.

[0049] In the description of the present application, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A PET foamed sheet splicing apparatus, characterized by, The application relates to a PET foam plate splicing device. The device comprises a bearing mechanism (1) and a heating component (2). The bearing mechanism (1) comprises two side-to-side butt-joint bearing pallets (4), the top surface of the bearing pallets (4) is provided with pneumatic clamps (5), and the two bearing pallets (4) are arranged to be close to each other to drive the PET foam plates carried thereon to be close to each other on the same plane; one of the bearing pallets (4) is provided with an intermediate plate (12) at the splicing joint. The heating component (2) comprises a heat-conducting metal strip (6) arranged above the splicing joint of the two bearing pallets (4), the bottom of the heat-conducting metal strip (6) is used for flattening the joint of the splicing joint of the PET foam plates, the two sides of the heat-conducting metal strip (6) are used for heating the splicing end of the PET foam plates to be molten, the bottom of the heat-conducting metal strip (6) is heat-insulated, the two sides of the heat-conducting metal strip (6) form heating contact areas, and the splicing joint between the two bearing pallets (4) is in the shape of a broken line, the splicing joint on the surface of the bearing pallet (4) and the splicing joint of the PET foam plate are arranged in a staggered mode, and the intermediate plate (12) serves as a temporary support for the molten PET foam plate.

2. The PET foamed sheet splicing apparatus according to claim 1, wherein The bottom of the bearing pallet (4) is provided with a rack (7), the bearing pallet (4) slides through the sliding rail arranged on the top of the rack (7), and the top of the rack (7) is provided with a supporting cross beam (8) at the center. 3.The PET foamed sheet splicing apparatus according to claim 2, characterized by The driving mechanism (3) is arranged between the two bearing pallets (4), the driving mechanism (3) comprises a rack (301) arranged at the bottom of the bearing pallet (4), the racks (301) at the bottom of the two bearing pallets (4) are arranged in a staggered mode and the teeth are opposite to each other, the bottom of the bearing pallet (4) is fixedly connected with a positioning sleeve (302) used in cooperation with the rack (301), the inside top of the rack (7) is provided with a gear (303), the gear (303) is located between the racks (301) of the two bearing pallets (4), and the racks (301) are in engagement with the gear (303). 4.The PET foamed sheet splicing apparatus according to claim 2, wherein The inside top of the rack (7) is provided with an electric push rod (9), the output end of the electric push rod (9) is fixedly connected with the bottom of any bearing pallet (4), and the electric push rod (9) is used for controlling the two bearing pallets (4) to be close to or away from each other. 5.The PET foamed sheet splicing apparatus according to claim 1, wherein The inside two sides of the heat-conducting metal strip (6) are provided with resistance heating sheets (601), the distance from the bottom of the heat-conducting metal strip (6) to the resistance heating sheet (601) is greater than the distance from the two sides of the heat-conducting metal strip (6) to the resistance heating sheet (601), and the bottom of the heat-conducting metal strip (6) is wrapped with an anti-sticking bottom lining (602). 6.The PET foamed sheet splicing apparatus according to claim 1, wherein When the PET foam plate is heated, the gap between the two bearing pallets (4) is greater than the width of the heat-conducting metal strip (6), the heat-conducting metal strip (6) is located in the gap between the two bearing pallets (4), and the splicing end of the PET foam plate is in contact with the heating contact area of the heat-conducting metal strip (6). 7.The PET foamed sheet splicing apparatus according to claim 1, wherein When the PET foam plate is spliced, the heat-conducting metal strip (6) is located outside the gap between the two bearing pallets (4), the two bearing pallets (4) are tightly close to each other to fully contact the splicing end of the PET foam plate, and the sum of the molten distances of the PET foam plate is smaller than the width of the bottom of the heat-conducting metal strip (6). 8.The PET foamed sheet splicing apparatus according to claim 2, wherein The surface of the bearing pallet (4) is provided with a heat insulation lining (401), a PET foamed board is fixed to the surface of the heat insulation lining (401), the top of the heat conducting metal strip (6) is fixedly connected with a guide rod (10), and the top of the guide rod (10) penetrates to the top of the support cross beam (8). 9.The PET foamed sheet splicing apparatus according to claim 2, wherein The top of the support cross beam (8) is fixedly connected with a lifting cylinder (11), the bottom of the lifting cylinder (11) is fixedly connected with the top of the heat conducting metal strip (6), and the lifting cylinder (11) is used for controlling the height of the heat conducting metal strip (6).

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