Automatic return line equipment for composite material

Abstract

The invention relates to the technical field of return line equipment, in particular to automatic return line equipment for a composite material. According to the automatic return line equipment for the composite material, the occupied area can be effectively reduced, the space utilization rate is increased, plates can be automatically turned to be subjected to peripheral edge sealing, manpower is saved, and the machining efficiency is improved. Automatic return line equipment for composite materials comprises a conveying belt, transfer frames and the like, and the front transfer frame and the rear transfer frame are connected to the left side and the right side of the conveying belt correspondingly. A second electric push rod is started, a rack is pushed to move rightwards, then a conveying plate is pushed to move forwards, a gear ring and the rack are made to move in an engaged mode, an air path table is driven to rotate by 90 degrees to turn plates, then the conveying plate is moved to the edge sealing machine again through a conveying belt and a transfer frame, the occupied area can be effectively reduced, and the space utilization rate is increased; and the plates can be automatically turned to be subjected to peripheral edge sealing, manpower is saved, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of return line equipment, and in particular to a composite material automatic return line equipment. Background Art

[0002] The fiberglass board, namely glass fiber reinforced plastic, is a material composed of glass fibers and a resin matrix. It has the characteristics of high strength, light weight, corrosion resistance, good insulation, etc., and is widely used in many fields such as construction, transportation, chemical industry, and electronics. During the production process of the fiberglass board, edge sealing treatment needs to be carried out on it. Usually, an edge sealing machine rotary production line is used. The existing edge sealing machine rotary production line realizes the rotation of the board through a conveyor belt, so as to facilitate the edge sealing treatment of the board at multiple places. However, since the boards are mostly long strips, a conveyor belt with a large area is required to enable the boards to rotate smoothly, occupying a large area, resulting in low space utilization rate. Moreover, after the boards rotate, workers are required to turn them and then send them into the edge sealing machine, which is time-consuming and laborious, reducing the work efficiency.

[0003] Therefore, a composite material automatic return line equipment has now been developed, which can effectively reduce the floor area, improve the space utilization rate, and can automatically turn the boards for edge sealing around the perimeter, saving manpower and improving the processing efficiency. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing edge sealing machine rotary production line, which occupies a large area, resulting in low space utilization rate, and after the boards rotate, workers are required to turn them and then send them into the edge sealing machine, which is time-consuming and laborious, reducing the work efficiency, the present invention provides a composite material automatic return line equipment that can effectively reduce the floor area, improve the space utilization rate, and can automatically turn the boards for edge sealing around the perimeter, saving manpower and improving the processing efficiency.

[0005] The technical implementation solution of the present invention is: a composite material automatic return line equipment, including a conveyor belt, a transfer frame, a push plate assembly, a vacuum pump, a positioning frame, a support rod, a bearing mechanism, a transposition mechanism, a lifting mechanism, and a reversing mechanism. There are two front and rear transfer frames connected to both the left and right sides of the conveyor belt. A push plate assembly is provided on each transfer frame. A vacuum pump is connected to the upper side of the middle part of the rear transfer frame on the left. The left rear part of the conveyor belt is connected to a positioning frame. The left part of the positioning frame is connected to the rear transfer frame on the left. There are two left and right support rods connected to the upper side of the left part of the conveyor belt. The left support rod is connected to the positioning frame. A bearing mechanism capable of bearing the boards is provided on the conveyor belt. A transposition mechanism capable of changing the position of the bearing boards is provided on the positioning frame. A lifting mechanism capable of lifting the boards is provided on the bearing mechanism. A reversing mechanism capable of automatically turning the boards is provided on the conveyor belt.

[0006] Furthermore, the push plate assembly includes an electric push rod and a push plate. Electric push rods are connected to each transfer frame, and push plates are connected to the telescopic ends of the electric push rods.

[0007] Furthermore, a plurality of auxiliary balls are rotatably provided on the transfer rack.

[0008] Furthermore, the bearing mechanism includes a transport plate, a ventilation column, an air circuit platform, a negative pressure suction cup, a pressure relief valve and a torsion spring. A plurality of transport plates are slidably and detachably connected to the conveyor belt. The middle of the transport plate is slidably connected to a ventilation column. The upper side of the ventilation column is rotatably connected to the air circuit platform. The ventilation column is connected to the adjacent air circuit platform. A plurality of negative pressure suction cups are connected to the upper side of the air circuit platform. The left and right sides and the front and rear sides of the air circuit platform are rotatably connected to the pressure relief valve. The pressure relief valve is connected to the connected air circuit platform with a torsion spring. The conveyor belt is started to move the transport plate to the transfer rack on the left rear side. On, connect the vacuum pump with the ventilation column, then place the fiberglass board on the transfer rack, make the fiberglass board contact with the positioning rack, align the fiberglass board with the edge banding machine, support the board with the support rod, and then start the vacuum pump to evacuate the air circuit table through the ventilation column to form a negative pressure state inside the air circuit table, so that the negative pressure suction cup absorbs the board and fixes the board on the transport board. Then start the push plate assembly on the left side of the transport board to push the transport board to the right to the rear of the conveyor belt, and then start the conveyor belt to transport the transport board to the right, so that one side of the board enters the edge banding machine for edge banding.

[0009] Furthermore, each ventilation column is provided with a one-way valve.

[0010] Furthermore, the shifting mechanism includes a hanger, a mounting frame, a first spring, a stabilizing wheel, a first electric push rod and a lever. The upper left side of the positioning frame is connected to the hanger, and the lower front side of the hanger is slidably connected to the front and rear mounting frames. The mounting frames are connected to the hangers with first springs, and the mounting frames are rotatably connected to stabilizing wheels. The upper left side of the conveyor belt is connected to the first electric push rod, and the telescopic end of the first electric push rod is connected to the lever. When the first electric push rod is started and the lever is pushed to extend to the right, the transport plate moves backward, and the lever drives the pressure relief valve on the air circuit platform to rotate and open it, so that the negative pressure suction cup releases pressure and separates from the plate. Then the push plate assembly continues to push the transport plate backward to the transfer frame on the rear side of the left portion, and then the vacuum pump is started to re-fix the plate so as to continue to drive the plate to move horizontally.

[0011] Furthermore, the lifting mechanism includes a pressure regulating cylinder, a piston, a telescopic lifting column, a circular rail, a contact wheel and an extrusion strip. Pressure regulating cylinders are connected to the upper sides of the front and rear parts of the transport plate. Pistons are slidably connected inside the pressure regulating cylinders. Telescopic lifting columns are connected to the pressure regulating cylinders. The telescopic lifting columns are all of hollow structure and are communicated with the connected pressure regulating cylinders. Circular rails are connected to the lower sides of the gas paths. The telescopic ends of the telescopic lifting columns are in contact with the adjacent circular rails. Contact wheels are rotatably connected to the upper parts of the pistons. Two front and rear extrusion strips are connected to the upper side of the rear part of the conveyor belt. The contact wheels are in extrusion cooperation with the extrusion strips. When the transport plate moves to the rear part of the conveyor belt, the contact wheels contact the extrusion strips. During movement, the contact wheels are extruded by the extrusion strips and move inwards, causing the pistons to move inwards and push the air in the pressure regulating cylinders into the telescopic lifting columns, so that the telescopic ends of the telescopic lifting columns extend and push the circular rails to move upwards, causing the gas path platform to move upwards.

[0012] Furthermore, the commutation mechanism includes a second electric push rod, a rack and a gear ring. The second electric push rod is connected to the upper side of the right part of the conveyor belt. The rack is connected to the telescopic end of the second electric push rod. Gear rings are connected to the lower sides of the gas path platforms. The gear rings are all located outside the adjacent circular rails. Start the second electric push rod to push the rack to move to the right, and then start the push plate assembly at the rear of the transport plate to push the transport plate forward, so that the gear ring and the rack engage and move, driving the gas path platform to rotate 90°, causing the sheet material to turn. Then, through the conveyor belt and the transfer rack, the transport plate is moved back to the edge banding machine to edge the other side of the sheet material.

[0013] Furthermore, a boosting mechanism is also included. The boosting mechanism includes a fixed frame, a high-pressure air pump and a wind baffle. Fixed frames are connected to the transfer racks. High-pressure air pumps are connected to the fixed frames. A plurality of wind baffles are connected to the transport plate. When the transport plate moves, it drives the wind baffles to move. When the transport plate moves to the transfer rack, start the high-pressure air pump on the fixed frame to blow the wind baffles to move, causing the transport plate to move closer to the transfer rack.

[0014] Furthermore, a locking mechanism is also included. The locking mechanism includes an installation cylinder, a locking part and a second spring. Installation cylinders are connected to the upper sides of the transport plates. Locking parts are slidably connected to the installation cylinders. Second springs are connected between the locking parts and the connected installation cylinders. The locking parts are in clamping cooperation with the adjacent gas path platforms. When the gas path platform rotates, it squeezes the locking parts to move downwards, and the second springs are squeezed and contracted. When the gas path platform rotates 90°, the locking parts are re-aligned with the card slots on the gas path platform, and then the second springs rebound, causing the locking parts to move upwards and re-engage with the gas path platforms.

[0015] The present invention has the following advantages: 1. By starting the second electric push rod, the rack is pushed to move rightward, and then the transport plate is pushed to move forward, enabling the gear ring and the rack to engage in motion, driving the air path platform to rotate 90° to turn the sheet, and then through the conveyor belt and the transfer rack, the transport plate is moved back to the edge banding machine, achieving the effects of effectively reducing the floor area, improving the space utilization rate, being able to automatically turn the sheet for edge banding on all four sides, saving labor, and improving the processing efficiency.

[0016] 2. By starting the first electric push rod, the lever is pushed to extend rightward. While the transport plate moves backward, the lever toggles the pressure relief valve to rotate and open, causing the negative pressure suction cup to relieve pressure and disengage from the sheet. Then, the push plate assembly continues to push the transport plate backward to the transfer rack at the left rear side, and then the vacuum pump is started to re-fix the sheet, achieving the effect of being able to automatically realize the position change of the air path platform on the sheet to facilitate the smooth operation of the transport plate.

[0017] 3. When the transport plate moves to the rear of the conveyor belt, the contact wheel contacts the extrusion strip. During movement, the contact wheel is squeezed by the extrusion strip and moves inward, causing the piston to move inward and push the air in the pressure regulating cylinder into the telescopic lifting column, so that the telescopic end of the telescopic lifting column extends to push the annular rail upward, causing the air path platform to move upward, achieving the effect of being able to automatically lift the air path platform to facilitate the layering of the sheets and avoid mutual interference.

[0018] 4. When the transport plate moves, it drives the wind shield to move. After the transport plate moves to the transfer rack, the high-pressure air pump on the fixed rack is started to blow the wind shield to move, causing the transport plate to move closer to the transfer rack, achieving the effect of being able to assist in pushing the transport plate onto the transfer rack to ensure accurate alignment between the transport plate and the transfer rack.

[0019] 5. When the air path platform rotates, it squeezes the locking part to move downward, and the second spring is compressed and contracted. After the air path platform rotates 90°, the locking part is re-aligned with the card slot of the air path platform. Subsequently, the second spring rebounds, causing the locking part to move upward and re-engage with the air path platform, achieving the effect of being able to lock the air path platform to prevent the air path platform from rotating randomly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 It is a partial structural schematic diagram of the present invention.

[0022] Figure 3 It is a partial three-dimensional structural schematic diagram of the present invention.

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the bearing mechanism of the present invention.

[0024] Figure 5 Schematic diagram of the three-dimensional structure of the first part of the carrying mechanism of the present invention.

[0025] Figure 6 Schematic diagram of the three-dimensional structure of the second part of the carrying mechanism of the present invention.

[0026] Figure 7 Schematic diagram of the three-dimensional structure of the position-changing mechanism of the present invention.

[0027] Figure 8 Partial three-dimensional structure schematic diagram of the position-changing mechanism of the present invention.

[0028] Figure 9 Schematic diagram of the three-dimensional structure of the lifting mechanism of the present invention.

[0029] Figure 10 Structural sectional view of the lifting mechanism of the present invention.

[0030] Figure 11 Three-dimensional structural sectional view of the lifting mechanism of the present invention.

[0031] Figure 12 Schematic diagram of the three-dimensional structure of the reversing mechanism of the present invention.

[0032] Figure 13 Partial three-dimensional structure schematic diagram of the reversing mechanism of the present invention.

[0033] Figure 14 Schematic diagram of the three-dimensional structure of the boosting mechanism of the present invention.

[0034] Figure 15 Schematic diagram of the structure of the locking mechanism of the present invention.

[0035] Figure 16 Three-dimensional structural sectional view of the locking mechanism of the present invention.

[0036] Meanings of the reference numerals in the figure: 1: conveyor belt, 11: transfer rack, 12: push plate assembly, 13: vacuum pump, 14: positioning rack, 15: support rod, 2: carrying mechanism, 20: transport plate, 21: ventilation column, 22: air path platform, 23: negative pressure suction cup, 24: pressure relief valve, 25: torsion spring, 3: position-changing mechanism, 30: hanging bracket, 31: mounting bracket, 32: first spring, 33: stabilizing wheel, 34: first electric push rod, 35: dial rod, 4: lifting mechanism, 40: pressure regulating cylinder, 41: piston, 42: telescopic lifting column, 43: annular rail, 44: contact wheel, 45: extrusion strip, 5: reversing mechanism, 50: second electric push rod, 51: rack, 52: gear ring, 6: boosting mechanism, 60: fixed bracket, 61: high-pressure air pump, 62: wind baffle, 7: locking mechanism, 70: mounting cylinder, 71: locking member, 72: second spring. Detailed implementation manners

[0037] Reference to embodiments in this document means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment each time, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0038] An automatic reflux line device for composite materials, as Figures 1 - 16 shown, includes a conveyor belt 1, a transfer rack 11, a push plate assembly 12, a vacuum pump 13, a positioning rack 14, a support rod 15, a bearing mechanism 2, a transposition mechanism 3, a lifting mechanism 4, and a commutation mechanism 5. There are two front and rear transfer racks 11 connected to both the left and right sides of the conveyor belt 1. Fourteen auxiliary balls are rotatably provided on each transfer rack 11 to facilitate the auxiliary transportation of plates. A push plate assembly 12 is provided on each transfer rack 11. The push plate assembly 12 includes an electric push rod and a push plate. Electric push rods are connected to each transfer rack 11, and push plates are connected to the telescopic ends of the electric push rods. A vacuum pump 13 is connected to the upper side of the middle part of the rear transfer rack 11 on the left side. A positioning rack 14 is connected to the rear side of the left part of the conveyor belt 1. The left part of the positioning rack 14 is connected to the rear transfer rack 11 on the left side. Two left and right support rods 15 are connected to the upper side of the left part of the conveyor belt 1. The left support rod 15 is connected to the positioning rack 14. A bearing mechanism 2 is provided on the conveyor belt 1. A transposition mechanism 3 is provided on the positioning rack 14. A lifting mechanism 4 is provided on the bearing mechanism 2. A commutation mechanism 5 is provided on the conveyor belt 1.

[0039] As Figure 1 、 Figure 4 、 Figure 5 and Figure 6 shown, the bearing mechanism 2 includes a transport plate 20, a ventilation column 21, an air path platform 22, a negative pressure suction cup 23, a pressure relief valve 24, and a torsion spring 25. Three transport plates 20 are slidably and detachably connected to the conveyor belt 1. Ventilation columns 21 are slidably connected to the middle parts of the transport plates 20. Check valves are provided on the ventilation columns 21 to facilitate maintaining a negative pressure state. Air path platforms 22 are rotatably connected to the upper sides of the ventilation columns 21. The ventilation columns 21 are all communicated with the adjacent air path platforms 22. Nine negative pressure suction cups 23 are connected to the upper sides of the air path platforms 22. Pressure relief valves 24 are rotatably connected to the left, right, front, and rear sides of the air path platforms 22. Torsion springs 25 are connected between the pressure relief valves 24 and the connected air path platforms 22.

[0040] As Figure 1 、 Figure 7 and Figure 8As shown, the commutation mechanism 3 includes a suspension bracket 30, a mounting bracket 31, a first spring 32, a stabilizing wheel 33, a first electric push rod 34 and a shifting rod 35. The upper side of the left part of the positioning bracket 14 is connected with the suspension bracket 30. The lower side of the front part of the suspension bracket 30 is slidably connected with two front and rear mounting brackets 31. A first spring 32 is connected between each mounting bracket 31 and the suspension bracket 30. A stabilizing wheel 33 is rotatably connected to each mounting bracket 31. The upper side of the left part of the conveyor belt 1 is connected with a first electric push rod 34. A shifting rod 35 is connected to the telescopic end of the first electric push rod 34.

[0041] As Figure 1 , Figure 9 , Figure 10 and Figure 11 shown, the jacking mechanism 4 includes a pressure regulating cylinder 40, a piston 41, a telescopic jacking column 42, an annular rail 43, a contact wheel 44 and an extrusion strip 45. The upper sides of the front and rear parts of the transport plate 20 are both connected with a pressure regulating cylinder 40. A piston 41 is slidably connected inside each pressure regulating cylinder 40. A telescopic jacking column 42 is connected to each pressure regulating cylinder 40. The telescopic jacking columns 42 are all of hollow structure and are all communicated with the connected pressure regulating cylinders 40. The lower sides of the gas path platforms 22 are both connected with an annular rail 43. The telescopic ends of the telescopic jacking columns 42 are all in contact with the adjacent annular rail 43. A contact wheel 44 is rotatably connected to the upper part of each piston 41. The upper side of the rear part of the conveyor belt 1 is connected with two front and rear extrusion strips 45. The contact wheel 44 and the extrusion strip 45 are in extrusion fit.

[0042] As Figure 1 , Figure 12 and Figure 13 shown, the commutation mechanism 5 includes a second electric push rod 50, a rack 51 and a gear ring 52. The upper side of the right part of the conveyor belt 1 is connected with a second electric push rod 50. A rack 51 is connected to the telescopic end of the second electric push rod 50. The lower sides of the gas path platforms 22 are both connected with a gear ring 52. The gear rings 52 are all located outside the adjacent annular rails 43.

[0043] When using the present invention, first place the conveyor belt 1 in the edge banding area of ​​the glass fiber board so that the conveyor belt 1 is located in front of the edge banding machine, then start the conveyor belt 1 to move the transport plate 20 to the transfer rack 11 on the left rear side, dock the vacuum pump 13 with the ventilation column 21, then place the glass fiber board on the transfer rack 11, make the glass fiber board contact with the positioning rack 14, make the glass fiber board and the edge banding machine aligned, support rod 15 supports the board, then start the vacuum pump 13, evacuate the air circuit platform 22 through the ventilation column 21, form a negative pressure state inside the air circuit platform 22, make the negative pressure suction cup 23 adsorb the board, and fix the board on the conveyor plate 20, then Start the push plate assembly 12 on the left side of the transport plate 20, so that the electric push rod pushes the push plate to move right, and then pushes the transport plate 20 to move right to the rear of the conveyor belt 1, and then starts the conveyor belt 1 to transport the transport plate 20 to the right, pushing the air circuit platform 22 to move upward, so that one side of the plate enters the edge banding machine for edge banding, and multiple transport plates 20 are used to achieve simultaneous edge banding of multiple plates. When the plate is edge banded, the pressure relief valve 24 can be rotated, and the torsion spring 25 is deformed to relieve the pressure on the air circuit platform 22, so that the plate is separated from the negative pressure suction cup 23, so that the plate can be removed, and then the pressure relief valve 24 is released, the torsion spring 25 is restored, and the pressure relief valve 24 is reset. When the plate moves vertically to the left side of the conveyor belt 1, the first electric push rod 34 is started to push the lever 35 to extend to the right, so that the transport plate 20 moves backward. At the same time, the lever 35 moves the pressure relief valve 24 on the air circuit platform 22 to rotate and open it, so that the negative pressure suction cup 23 releases pressure and separates from the plate. Then, the push plate assembly 12 continues to push the transport plate 20 to move backward to the transfer rack 11 on the rear side of the left part, and then the vacuum pump 13 is started to re-fix the plate so as to continue to drive the plate to move horizontally. When the plate moves to the left side of the conveyor belt 1, the stabilizing wheel 33 on the mounting frame 31 is always kept in contact with the plate through the force of the first spring 32, thereby improving the stability of the plate, thereby automatically realizing the replacement of the air circuit platform 22 on the plate, so as to facilitate the smooth operation of the transport plate 20. When the transport plate 20 moves to the rear of the conveyor belt 1, the contact wheel 44 contacts the extrusion bar 45. When moving, the contact wheel 44 is squeezed inward by the extrusion bar 45, so that the piston 41 moves inward to push the air in the pressure regulating cylinder 40 into the telescopic lifting column 42, so that the telescopic end of the telescopic lifting column 42 extends to push the annular rail 43 to move upward, so that the air circuit platform 22 moves upward, thereby automatically lifting the air circuit platform 22 to facilitate the stratification of the plates to avoid mutual interference. After the contact wheel 44 disengages from the extrusion bar 45, the telescopic lifting column 42 is retracted, so that the air circuit platform 22 moves downward and resets.After the transport plate 20 moves onto the transfer rack 11 at the rear right side, the second electric push rod 50 is activated to push the rack 51 to move rightward. Then, the push plate assembly 12 at the rear side of the transport plate 20 is activated to push the transport plate 20 forward, causing the gear ring 52 to engage with the rack 51 and drive the air circuit platform 22 to rotate by 90°, so that the sheet material is turned. After that, through the conveyor belt 1 and the transfer rack 11, the transport plate 20 is moved back to the edge banding machine to perform edge banding on the other side of the sheet material, thus effectively reducing the floor area, improving the space utilization rate, and being able to automatically turn the sheet material for edge banding on all four sides, saving labor and improving the processing efficiency.

[0044] As Figure 1 and Figure 14 shown, it further includes a boosting mechanism 6. The boosting mechanism 6 includes a fixed frame 60, a high-pressure air pump 61, and a wind deflector 62. Fixed frames 60 are connected to the transfer racks 11, high-pressure air pumps 61 are connected to the fixed frames 60, and four wind deflectors 62 are connected to the transport plate 20.

[0045] By using the boosting mechanism 6 of this device, the transport plate 20 can be assisted in moving. When the transport plate 20 moves, it drives the wind deflector 62 to move. After the transport plate 20 moves to the transfer rack 11, the high-pressure air pump 61 on the fixed frame 60 is activated to blow the wind deflector 62 to move, causing the transport plate 20 to move closer to the transfer rack 11, thus playing a role in being able to assist in pushing the transport plate 20 onto the transfer rack 11 and ensuring accurate alignment between the transport plate 20 and the transfer rack 11.

[0046] As Figure 1 , Figure 15 and Figure 16 shown, it further includes a locking mechanism 7. The locking mechanism 7 includes an installation cylinder 70, a locking member 71, and a second spring 72. Installation cylinders 70 are connected to the upper sides of the transport plates 20. Locking members 71 are slidably connected to the installation cylinders 70. Second springs 72 are connected between the locking members 71 and the corresponding installation cylinders 70. The locking members 71 are in snap-fit connection with the adjacent air circuit platforms 22.

[0047] By using the locking mechanism 7 of this device, the air circuit platform 22 can be locked. When the air circuit platform 22 rotates, it squeezes the locking member 71 to move downward, and the second spring 72 is compressed and contracted. After the air circuit platform 22 rotates by 90°, the locking member 71 is re-aligned with the card slot of the air circuit platform 22. Subsequently, the second spring 72 rebounds to make the locking member 71 move upward to re-engage with the air circuit platform 22 in a snap-fit manner, thus playing a role in being able to lock the air circuit platform 22 and prevent the air circuit platform 22 from rotating randomly.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An automatic reflux line equipment for composite materials, characterized in that: It includes a conveyor belt (1), transfer frames (11), push plate assemblies (12), a vacuum pump (13), a positioning frame (14), support rods (15), a loading mechanism (2), a position-changing mechanism (3), a lifting mechanism (4), and a reversing mechanism (5). There are two front and rear transfer frames (11) connected to both the left and right sides of the conveyor belt (1). Push plate assemblies (12) are provided on the transfer frames (11). A vacuum pump (13) is connected to the upper side of the middle part of the rear transfer frame (11) on the left side. A positioning frame (14) is connected to the rear side of the left part of the conveyor belt (1). The left part of the positioning frame (14) is connected to the rear transfer frame (11) on the left side. There are two left and right support rods (15) connected to the upper side of the left part of the conveyor belt (1). The left support rod (15) is connected to the positioning frame (14). A loading mechanism (2) capable of loading sheets is provided on the conveyor belt (1). A position-changing mechanism (3) capable of changing the position of the loaded sheets is provided on the positioning frame (14). A lifting mechanism (4) capable of lifting the sheets is provided on the loading mechanism (2). A reversing mechanism (5) capable of automatically turning the sheets is provided on the conveyor belt (1).

2. An automatic reflux line device for a composite material according to claim 1, characterized in that: A plurality of auxiliary balls are rotatably provided on the transfer frames (11).

3. The automatic reflux line equipment for a composite material according to claim 1, characterized in that: The push plate assembly (12) includes an electric push rod and a push plate. Electric push rods are connected to the transfer frames (11). Push plates are connected to the telescopic ends of the electric push rods.

4. An automatic reflux line equipment for a composite material according to claim 1, characterized in that: The loading mechanism (2) includes a transport plate (20), ventilation columns (21), a gas path platform (22), negative pressure suction cups (23), pressure relief valves (24), and torsion springs (25). A plurality of transport plates (20) are slidably and detachably connected to the conveyor belt (1). Ventilation columns (21) are slidably connected to the middle parts of the transport plates (20). Gas path platforms (22) are rotatably connected to the upper sides of the ventilation columns (21). The ventilation columns (21) are communicated with the adjacent gas path platforms (22). A plurality of negative pressure suction cups (23) are connected to the upper sides of the gas path platforms (22). Pressure relief valves (24) are rotatably connected to the left, right, front, and rear sides of the gas path platforms (22). Torsion springs (25) are connected between the pressure relief valves (24) and the connected gas path platforms (22). When the vacuum pump (13) is started, the gas path platforms (22) are evacuated through the ventilation columns (21) to form a negative pressure state inside the gas path platforms (22), so that the negative pressure suction cups (23) adsorb the sheets and fix the sheets on the transport plates (20). Then, the push plate assembly (12) on the left side of the transport plate (20) is started to push the transport plate (20) to move rightward to the rear part of the conveyor belt (1). Then, the conveyor belt (1) is started to convey the transport plate (20) rightward, so that the sheets enter the edge banding machine for edge banding one by one.

5. An automatic reflux line device for a composite material according to claim 4, characterized in that: Check valves are provided on the ventilation columns (21).

6. The automatic reflux line equipment for a composite material according to claim 4, characterized in that: The shifting mechanism (3) comprises a hanger (30), a mounting frame (31), a first spring (32), a stabilizing wheel (33), a first electric push rod (34) and a shifting rod (35); the upper left side of the positioning frame (14) is connected to the hanger (30); the lower front side of the hanger (30) is slidably connected to two front and rear mounting frames (31); the mounting frames (31) are connected to the hanger (30) by the first spring (32); the mounting frames (31) are rotatably connected to the stabilizing wheel (33); the upper left side of the transmission belt (1) is connected to the first electric push rod (34); the first electric push rod (34) is connected to the first electric push rod (35); A lever (35) is connected to the telescopic end of an electric push rod (34). The first electric push rod (34) is started to push the lever (35) to extend to the right, so that the transport plate (20) moves backward. At the same time, the lever (35) moves the pressure relief valve (24) on the air circuit platform (22) to rotate and open, so that the negative pressure suction cup (23) releases pressure and separates from the plate. Then, the push plate assembly (12) continues to push the transport plate (20) backward to the transfer rack (11) on the left rear side, and then the vacuum pump (13) is started to re-fix the plate so as to continue to drive the plate to move horizontally.

7. An automatic reflux line device for a composite material according to claim 6, characterized in that: The lifting mechanism (4) comprises a pressure regulating cylinder (40), a piston (41), a telescopic lifting column (42), an annular rail (43), a contact wheel (44) and an extrusion strip (45). The upper sides of the front and rear parts of the transport plate (20) are connected to the pressure regulating cylinder (40). The piston (41) is slidably connected inside the pressure regulating cylinder (40). The pressure regulating cylinder (40) is connected to the telescopic lifting column (42). The telescopic lifting column (42) is a hollow structure. The telescopic lifting column (42) is connected to the connected pressure regulating cylinder (40). The lower side of the gas circuit platform (22) is connected to the annular rail (43). The telescopic end of the telescopic lifting column (42) is connected to the adjacent annular rail (43). The upper part of the piston (41) is rotatably connected with a contact wheel (44), and the upper side of the rear part of the conveyor belt (1) is connected with two front and rear extrusion strips (45). The contact wheel (44) and the extrusion strip (45) are extruded and matched. When the transport plate (20) moves to the rear part of the conveyor belt (1), the contact wheel (44) contacts the extrusion strip (45). When moving, the contact wheel (44) is squeezed inward by the extrusion strip (45), so that the piston (41) moves inward to push the air in the pressure regulating cylinder (40) into the telescopic lifting column (42), so that the telescopic end of the telescopic lifting column (42) extends to push the annular rail (43) to move upward, so that the air path platform (22) moves upward.

8. An automatic reflux line equipment for a composite material according to claim 7, characterized in that: The reversing mechanism (5) includes a second electric push rod (50), a rack (51) and a gear ring (52). The second electric push rod (50) is connected to the upper side of the right part of the conveyor belt (1). The telescopic end of the second electric push rod (50) is connected to the rack (51). The gear rings (52) are connected to the lower sides of the air circuit platforms (22). The gear rings (52) are all located outside the adjacent annular rails (43). Start the second electric push rod (50) to push the rack (51) to move to the right. Then start the push plate assembly (12) at the rear of the transport plate (20) to push the transport plate (20) to move forward, so that the gear ring (52) meshes with the rack (51) to drive the air circuit platform (22) to rotate 90°, so that the sheet material is turned. Then, through the conveyor belt (1) and the transfer frame (11), the transport plate (20) is moved back to the edge banding machine to edge the other side of the sheet material.

9. An automatic reflux line device for a composite material according to claim 8, characterized in that: It further includes a boosting mechanism (6). The boosting mechanism (6) includes a fixing frame (60), a high-pressure air pump (61) and a wind shield (62). The fixing frames (60) are connected to the transfer frames (11). The high-pressure air pumps (61) are connected to the fixing frames (60). A plurality of wind shields (62) are connected to the transport plates (20). When the transport plate (20) moves, it drives the wind shield (62) to move. When the transport plate (20) moves to the transfer frame (11), start the high-pressure air pump (61) on the fixing frame (60) to blow the wind shield (62) to move, so that the transport plate (20) moves closer to the transfer frame (11).

10. The automatic reflux line equipment for a composite material according to claim 9, characterized in that: It further includes a locking mechanism (7). The locking mechanism (7) includes a mounting cylinder (70), a locking member (71) and a second spring (72). The mounting cylinders (70) are connected to the upper sides of the transport plates (20). The locking members (71) are slidably connected to the mounting cylinders (70). The second springs (72) are connected between the locking members (71) and the connected mounting cylinders (70). The locking members (71) are in snap-fit connection with the adjacent air circuit platforms (22). When the air circuit platform (22) rotates, it squeezes the locking member (71) to move downward, and the second spring (72) is compressed and contracted. When the air circuit platform (22) rotates 90°, the locking member (71) is re-aligned with the card slot on the air circuit platform (22). Then the second spring (72) rebounds to make the locking member (71) move upward to re-engage with the air circuit platform (22).

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