A production line for colored composite environmental protection boards

Abstract

The present invention relates to the field of PVC production equipment, and particularly discloses a production line for a colored composite environmental protection board, which includes a PLC control system, a PVC reinforced fascia production line, a first tractor, a tension control device, a second tractor, a PVC foam board production line, a third tractor, a first longitudinal cutting machine, a mask production line, a laminating machine, a crawler tractor, a second longitudinal cutting machine, a transverse cutting machine, a conveying device and a manipulator. The present invention can produce colored composite environmental protection boards that meet the requirements and have high quality, and has a compact structure, strong continuity, and a smooth process throughout, achieving a seamless operation, reducing the processes of receiving and sending in the intermediate links, improving production efficiency, and during the production process, the waste cut off is directly recycled through a waste recycling device and other means back into the first-stage mixing tank for recycling and reuse, which also saves energy and meets environmental protection requirements.

Description

Technical Field

[0001] The present invention relates to the field of PVC production equipment, and particularly to a production line for colored composite environmental protection boards. Background Art

[0002] Currently, the market demand for ordinary PVC foam boards is more than 350,000 tons, and the foreign market demand is more than 150,000 tons, with a total exceeding 500,000 tons. The demand for high-end boards, including colored boards and high-strength boards, exceeds 40% of the total, and the market share is more than 200,000 tons, and the demand is continuously increasing. For this reason, the applicant has invented a high-strength colored composite environmental protection board. Since there is no production line in the existing production lines that can complete this composite environmental protection board, a dedicated production line is required. Summary of the Invention

[0003] In order to make up for the defects of the existing technology, the present invention provides a production line for colored composite environmental protection boards that can produce high-strength composite environmental protection boards.

[0004] The present invention is realized by the following technical solutions:

[0005] A production line for colored composite environmental protection boards, characterized in that it includes a PLC control system, a PVC reinforcement fascia production line, a first tractor, a tension control device, a second tractor, a PVC foam board production line, a third tractor, a first longitudinal cutting machine, a mask production line, a laminating machine, a crawler tractor, a second longitudinal cutting machine, a transverse cutting machine, a conveying device and a manipulator, wherein,

[0006] The PVC reinforcement fascia production line includes a stirring device, a main machine, a film die, a pre-cooling roller, a forming machine, a punching device, a cutting device and a waste recycling device:

[0007] The stirring device includes an initial feeding device and a waste feeding device, and a primary stirring tank and a secondary stirring tank are arranged below the initial feeding device and the waste feeding device;

[0008] The forming machine is a four-roller forming machine, including: a fixed calendering and cooling roller and a lower adjustable calendering and cooling roller below it, and two horizontally adjustable cooling rollers are also arranged in front of the fixed calendering and cooling roller, and these two horizontally adjustable cooling rollers are horizontally arranged with the fixed calendering and cooling roller;

[0009] The punching device includes an inclined arrangement of a female cutting roller and a male cutting roller, an upper tensioning roller is arranged on the inlet side of the film, and a lower tensioning roller is arranged on the outlet side;

[0010] Below the junction of the female cutting roller and the male cutting roller is a waste recycling device, including a blanking hopper. Above the blanking hopper is a waste hopper. The lower end of the blanking hopper is connected to a blanking channel. Inside the blanking channel are rotating extrusion rollers that mesh with each other. Below the rotating extrusion rollers are a fixed knife and a crushing knife roller that cooperate with each other. At the lower end of the blanking channel is a material extraction fan. At the upper end of the blanking channel are also two waste extrusion rollers.

[0011] The outlet end of the material extraction fan is connected to a cyclone separator through a first pipeline. At the lower end of the cyclone separator is a feeding fan. The feeding fan is connected to the upper end of the waste feeding device through a second pipeline.

[0012] Guiding rollers are respectively arranged in front of and behind the cutting device. Below the guiding rollers are turning rollers.

[0013] The PVC foam board production line includes an intermediate layer laminating mold and a stress relieving device. The intermediate layer laminating mold includes: upper and lower parts that are mirror images of each other and are put together. After being put together, there is a gap between the upper and lower parts. Inside each part is a material channel. The material channel includes a connected feeding channel, a shunt area, a pressure stabilizing area, a pressure boosting buffer area, a die shaping area, and a pressure release combination area. The inlet of the material channel is located on the side of each part. Thickness adjustment blocks are provided corresponding to the positions of the pressure boosting buffer area, the die shaping area, and the pressure release combination area. At the front end of the thickness adjustment block are installed a core layer and a foam laminating cooling block. Inside each part are an isolation area and heating rods.

[0014] The facial mask production line includes a facial mask laminating mold and a facial mask calender. The facial mask laminating mold is an integral block. The integral block is provided with a foam board channel and a facial mask material channel. The inlet of the facial mask material channel is located on the upper surface of the integral block. The facial mask material channel includes a blanking channel, a material shunt area, and a temperature reduction and cooling area. At the inlet end of the foam board channel are two feeding rollers. Inside the integral block are several mold temperature pipes, which are connected to a mold temperature machine through the mold temperature pipes. Part of the mold temperature pipes are horizontally arranged behind the material shunt area, and the other part are arranged vertically in front of the material shunt area. Above the temperature reduction and cooling area is a nitrogen cooling pipe, which is connected to a nitrogen generator through the nitrogen cooling pipe.

[0015] At the lower end of the initial feeding device is a spiral auger. At the lower ends of the waste feeding devices are respectively conveyor belts. The ends of the conveyor belts and the spiral auger are both above the first-stage mixing tank.

[0016] The stirring shaft of the second-stage mixing tank is arranged horizontally.

[0017] Below the horizontal adjustment cooling roller are several lower adjustment rollers.

[0018] In front of the lower adjustment roller is a bending roller.

[0019] Above the rotating extrusion roller, there is a material baffle.

[0020] Between the waste extrusion roller and the turning roller, there is a waste supporting roller.

[0021] The film die is fixedly connected by upper and lower die bodies, and then forms a channel, a runner, a U-shaped steady flow area, a buffer pressurization area and a die head area; at the front ends of the upper and lower die bodies, there are respectively heat transfer oil channels.

[0022] Among them, the upper die body is provided with die head thickness adjusting screws.

[0023] Inside the upper and lower die bodies, there are respectively electric heating rods.

[0024] The tension control device includes a buffer device and a set of tension rollers before and after the buffer device. The buffer device includes several groups of columns. On each group of columns, there is a moving roller. Above the moving roller, there is a fixed roller. The fixed roller and the moving roller are arranged alternately; the set of tension rollers includes several tension rollers made of pressure-sensitive materials. The tension rollers are of a hollow structure and are internally provided with pressure sensors.

[0025] The columns are of a hollow structure with long strip holes. Inside them, there are screw rods that can only rotate axially. The screw rods are threadedly connected to threaded cylinders. The moving roller includes a fixed shaft and a rotating roller. The rotating roller can rotate around the fixed shaft. The two ends of the fixed shaft are fixed on the threaded cylinder; the screw rods are driven to rotate by motors; the pressure sensors and the motors are respectively electrically connected to the PLC control system.

[0026] There is a front isolation area between the thickness adjustment block and the core layer and the foaming composite cooling block.

[0027] Each part of the intermediate layer composite die is composed of a first part and a second part. Among them, the second part is sleeved inside the first part. The material channel is jointly formed by the first part and the second part. Between the first part and the second part, the isolation area is formed by support blocks.

[0028] On the first part, a fixed block is installed. On the fixed block, several adjusting bolts that can only rotate axially are installed. The adjusting bolts are threadedly connected to the thickness adjustment block.

[0029] The stress relieving device includes ten groups of stress relieving roller groups. Each group of stress relieving roller groups includes a fixed stress relieving roller and an adjustable stress relieving roller. Both the fixed stress relieving roller and the adjustable stress relieving roller are metal rollers.

[0030] The third tractor includes eight groups of traction rubber roller groups.

[0031] The foaming board channel opening inside the feeding roller is in a flared shape.

[0032] The mask calender has two groups of mask calender rollers, and a mask supporting roller is arranged between the two groups of mask calender rollers.

[0033] The crawler tractor includes a frame and two sets of crawlers, upper and lower. The crawler includes a driving shaft and a driven shaft. Four transmission gears are respectively installed on the driving shaft and the driven shaft. Transmission chains are arranged between the transmission gears corresponding in position on the driving shaft and the driven shaft. One group consists of two transmission chains, and several rubber plates are installed between each group of transmission chains; An air cylinder with an upward output end is installed on the frame. There is one air cylinder on each side, left and right. A longitudinal column is installed beside the air cylinder. The output end of the air cylinder is hinged to a crank. The top ends of the crank and the longitudinal column are both U-shaped. A hinge shaft is provided at the U-shaped top end of the longitudinal column. A transmission arm is hinged to the hinge shaft. The transmission arm is in the shape of a grooved plate. The other end of the transmission arm and the upper end of the crank are jointly hinged to a middle shaft. This middle shaft is fixed in the middle of a frame. The driving shaft and the driven shaft of the upper crawler are installed on the frame.

[0034] Two ear plates are respectively fixedly provided on the hinge shaft and the middle shaft. A rotating pin shaft is installed between the two ear plates. A hole is drilled in the rotating pin shaft. The two ends of a pull rod respectively pass through the two holes, and then nuts are fastened on both sides of the holes.

[0035] The conveying device includes a conveying frame. A number of conveying rotating shafts are provided on the conveying frame. A conveying motor is provided below the conveying frame. The conveying motor is in transmission connection with a conveying longitudinal shaft. The conveying longitudinal shaft is respectively in transmission connection with the conveying rotating shafts through a number of transmission belts; The conveying rotating shafts are evenly distributed radially.

[0036] The beneficial effects of the present invention are:

[0037] The present invention can produce qualified and high-quality color composite environmental protection boards, and has a compact structure and strong continuity. From the production of the reinforcing fascia to the synthesis of the foaming board, during the intermediate process, the reinforcing fascia is laminated between the upper and lower foaming layers, and the upper and lower foaming layers are fused together through the holes on the reinforcing fascia to form a solid whole. Then, the color film is laminated on the surface layer of the foaming board to make it have a gorgeous color. Finally, a protective film is covered, and after cutting, it forms a color foaming environmental protection board that meets the needs of users. The whole process is smooth and completed in one go, reducing the processes of receiving and delivering in the intermediate links, improving the production efficiency. And during the production process, the waste materials cut off directly return to the primary mixing tank through the waste material recycling device for recycling and reuse, which also saves energy and meets the environmental protection requirements. Description of the Drawings

[0038] The present invention will be further described below with reference to the drawings.

[0039] Figure 1 It is the front view structural schematic diagram of the present invention;

[0040] Figure 2 is Figure 1 the enlarged structural schematic diagram of part c in

[0041] Figure 3 is Figure 1 the enlarged structural schematic diagram of part d in

[0042] Figure 4 is Figure 1 the enlarged structural schematic diagram of part e in

[0043] Figure 5 is Figure 1 the enlarged structural schematic diagram of part f in

[0044] Figure 6 the top view structural schematic diagram of the present invention;

[0045] Figure 7 is Figure 6 the enlarged structural schematic diagram of part g in

[0046] Figure 8 is Figure 6 the enlarged structural schematic diagram of part h in

[0047] Figure 9 is Figure 6 the enlarged structural schematic diagram of part i in

[0048] Figure 10 is Figure 6 the enlarged structural schematic diagram of part j in

[0049] Figure 11 is Figure 6 the partial structural schematic diagram in the B direction of

[0050] Figure 12 is Figure 6 the partial structural schematic diagram in the C direction of

[0051] Figure 13 the front view structural schematic diagram of the PVC reinforced fascia production line;

[0052] Figure 14 is Figure 13 the enlarged structural schematic diagram of part a in

[0053] Figure 15 is Figure 13 the enlarged structural schematic diagram of part b in

[0054] Figure 16 the top view structural schematic diagram of the PVC reinforced fascia production line;

[0055] Figure 17 the enlarged view of the stirring device and the main machine;

[0056] Figure 18 It is a schematic cross-sectional structure diagram of a film mold;

[0057] Figure 19 It is a schematic top view structure diagram of the lower part mold body of the film mold;

[0058] Figure 20 It is an enlarged schematic structure diagram of a molding machine;

[0059] Figure 21 It is an enlarged schematic structure diagram of a punching device and a waste recycling device;

[0060] Figure 22 It is an enlarged schematic structure diagram of the punching device;

[0061] Figure 23 It is an enlarged schematic structure diagram of the waste recycling device;

[0062] Figure 24 It is for Figure 23 The enlarged schematic structure diagram at position A in;

[0063] Figure 25 It is an enlarged schematic structure diagram of a cutting device;

[0064] Figure 26 It is a front view schematic structure diagram of a tension control device;

[0065] Figure 27 It is a top view schematic structure diagram of a tension control device;

[0066] Figure 28 It is a schematic diagram of the connection relationship between a column and a moving roller;

[0067] Figure 29 It is a front view and perspective schematic structure diagram of an intermediate layer lamination mold;

[0068] Figure 30 It is a right view and perspective schematic structure diagram of an intermediate layer lamination mold;

[0069] Figure 31 It is a front view schematic structure diagram of a stress relieving device;

[0070] Figure 32 It is a front view schematic structure diagram of a facial mask production line;

[0071] Figure 33 It is a front view and cross-sectional schematic structure diagram of a facial mask lamination mold;

[0072] Figure 34 It is a front view schematic structure diagram of a crawler tractor;

[0073] Figure 35 It is a top view schematic structure diagram of a crawler tractor;

[0074] Figure 36 is Figure 35 the enlarged structural schematic diagram at position D in

[0075] Figure 37 is Figure 36 the left-view structural schematic diagram of the top part of the vertical column in

[0076] Figure 38 is Figure 36 the structural schematic diagram of the transmission arm in the E direction in

[0077] Figure 39 is Figure 38 the left-view structural schematic diagram of

[0078] Figure 40 the top-view structural schematic diagram of the conveying device;

[0079] Figure 41 is the schematic diagram of the connection relationship between the conveying longitudinal axis and the conveying rotating shaft.

[0080] In the figure, 0 is the film; 00 is the waste film; 000 is the PVC reinforcing fascia;

[0081] 01 is the PVC reinforcing rib production line, 1 is the stirring device, 101 is the initial feeding device, 102 is the waste feeding device, 103 is the conveyor belt, 104 is the primary stirring tank, 105 is the secondary stirring tank, 106 is the stirring shaft, 107 is the spiral auger;

[0082] 2 is the main machine;

[0083] 3 is the film die, 31 is the channel, 32 is the sub-channel, 33 is the U-shaped steady flow area, 34 is the buffer pressurization area, 35 is the die head area, 36 is the heat transfer oil channel, 37 is the electric heating rod, 38 is the die head thickness adjustment screw;

[0084] 4 is the pre-cooling roller;

[0085] 5 is the forming machine, 51 is the fixed calender cooling roller, 52 is the lower adjustable calender cooling roller, 53 is the horizontal adjustable cooling roller, 54 is the lower adjusting roller, 55 is the bending roller;

[0086] 6 is the punching device, 61 is the female cutting roller, 62 is the male cutting roller, 63 is the upper tensioning roller, 64 is the lower tensioning roller, 65 is the raised block, 66 is the recessed groove;

[0087] 7 is the cutting device, 71 is the guiding roller, 72 is the turning roller, 73 is the waste supporting roller;

[0088] 8 Waste recycling device, 801 blanking hopper, 802 waste hopper, 803 waste extrusion roller, 804 blanking channel, 805 rotating extrusion roller, 806 fixed knife, 807 crushing knife roller, 808 material extraction fan, 809 first pipeline, 810 cyclone separator, 811 feeding fan, 812 second pipeline, 813 baffle plate;

[0089] 9 First tractor;

[0090] 10 Tension control device, 1001 tension roller set, 1002 column, 1003 screw, 1004 motor, 1005 threaded cylinder, 1006 moving roller, 10061 fixed shaft, 10062 rotating roller, 1007 fixed roller, 1008 deflecting roller;

[0091] 11 Second tractor;

[0092] 12 PVC foam board production line, 120 intermediate layer lamination die, 1201 feeding channel, 1202 shunt area, 1203 voltage stabilizing area, 1204 pressure increasing buffer area, 1205 die sizing area, 1206 pressure release combination area, 1207 thickness adjustment block, 1208 core layer and foam lamination cooling block, 1209 front isolation area, 1210 first part, 1211 second part, 1212 support block, 1213 isolation area, 1214 fixing block, 1215 adjusting bolt, 1216 heating rod, 1217 moving bracket, 1218 fixed stress relieving roller, 1219 adjusting stress relieving roller, 1220 bracket;

[0093] 13 Third tractor, 1301 traction rubber roller set;

[0094] 14 First longitudinal cutting machine;

[0095] 15 Facial mask production line, 150 facial mask lamination die, 1501 foam board channel, 1502 feeding roller, 1503 blanking channel, 1504 material shunt area, 1505 cooling area, 1506 mold temperature pipe, 1507 mold temperature machine, 1508 nitrogen cooling pipe, 1509 nitrogen generator, 1510 facial mask calendering roller set, 1511 facial mask supporting roller;

[0096] 16 Laminating machine;

[0097] 17 Track tractor, 1701 frame, 1702 track, 1703 driving shaft, 1704 driven shaft, 1705 frame, 1706 transmission gear, 1707 transmission chain, 1708 rubber plate, 1709 cylinder, 1710 longitudinal column, 1711 crank, 1712 transmission arm, 1713 hinge shaft, 1714 middle shaft, 1715 pull rod, 1716 ear plate, 1717 rotating pin shaft, 1718 nut;

[0098] 18 Second longitudinal cutting machine;

[0099] 19 Horizontal cutting machine;

[0100] 20 Conveyor device, 2001 Conveyor frame, 2002 Conveyor rotating shaft, 2003 Conveyor motor, 2004 Conveyor longitudinal shaft, 2005 Transmission belt;

[0101] 21 Manipulator. Detailed implementation manners

[0102] The attached drawings are specific embodiments of the present invention. As Figures 1 to 41 shown, this color composite environmental protection board production line includes a PLC control system, and the entire production line is controlled by the PLC control system. It also includes a PVC reinforced fascia production line 01, a first tractor 9, a tension control device 10, a second tractor 11, a PVC foam board production line 12, a third tractor 13, a first longitudinal cutting machine 14, a mask production line 15, a laminating machine 16, a track tractor 17, a second longitudinal cutting machine 18, a horizontal cutting machine 19, a conveyor device 20 and a manipulator 21, wherein:

[0103] First is the PVC reinforced fascia production line 01, which successively includes a stirring device 1, a main machine 2, a film die 3, a pre-cooling roller 4, a forming machine 5, a punching device 6, a cutting device 7 and a waste recycling device 8 from back to front, wherein:

[0104] The stirring device 1 includes an initial feeding device 101 and a waste feeding device 102, which are two feeding tanks, but with different functions. There is a conveyor belt 103 driven by a motor below the waste feeding device 102, and a spiral auger 107 is below the initial feeding device 101. The tails of the conveyor belt 103 and the spiral auger 107 are both located above a primary stirring tank 104. The primary stirring tank 104 is further connected to a secondary stirring tank 105 below, and the stirring shaft 106 of the secondary stirring tank 105 is horizontal.

[0105] Following the stirring device 1 is the main machine 2, which includes an extruder, etc., which is prior art and will not be elaborated. After being heated and sheared by the main machine 2, it is finally extruded by the extruder into a film in the film die 3. The film die 3 is a special die, and its specific structure is:

[0106] It is fixedly connected by upper and lower die bodies, forming a channel 31, a sub-channel 32, a U-shaped steady flow area 33, a buffer pressurization area 34 and a die head area 35 from back to front. Heat-conducting oil channels 36 are respectively arranged at the front ends of the upper and lower die bodies. In addition, electric heating rods 37 are respectively installed in the upper and lower die bodies; there is also a die head thickness adjustment screw 38 at the front end of the upper die body. By adjusting the die head thickness adjustment screw 38, the front end of the upper die body can be lifted or lowered, thereby controlling the thickness of the film 0 coming out of the die head area 35.

[0107] After coming out of the film die 3 as the film 0, it enters the pre-cooling roller 4. The pre-cooling roller 4 is a prior art and will not be elaborated here. After passing through the pre-cooling roller 4, it enters the forming machine 5. The forming machine 5 is a four-roller forming machine. As the name implies, the four-roller forming machine has four rollers. The two in the up-down direction are respectively the fixed calender cooling roller 51 and the lower adjustable calender cooling roller 52. The fixed calender cooling roller 51 is above, and the lower adjustable calender cooling roller 52 is below. By adjusting the position of the lower adjustable calender cooling roller 52, the distance between the fixed calender cooling roller 51 and the lower adjustable calender cooling roller 52 can be adjusted. The gap between the two is aligned with the die area 35 of the film die 3, that is, the outlet of the film 0. In front of the fixed calender cooling roller 51 are two horizontally adjustable cooling rollers 53. These two horizontally adjustable cooling rollers 53 are horizontally arranged with the fixed calender cooling roller 51, and the distance between these two horizontally adjustable cooling rollers 53 can be adjusted. The adjustment method is a prior art. The fixed calender cooling roller 51 does not contact with one of the horizontally adjustable cooling rollers 53 close to it, and there is a gap between them. The film 0 comes out from between the fixed calender cooling roller 51 and the lower adjustable calender cooling roller 52 and then bypasses this horizontally adjustable cooling roller 53 upwards, and then enters between the two horizontally adjustable cooling rollers 53 that are close together and comes out downwards, and then passes through a lower adjusting roller 54. Actually, there are several lower adjusting rollers 54 here. In actual application, the lower adjusting roller 54 is selected according to the actual situation to let the film 0 pass through, and then enters the punching device 6 after passing through a bending roller 55:

[0108] The punching device 6 includes an inclinedly arranged female cutting roller 61 and a male cutting roller 62. That is to say: the female cutting roller 61 is in the front upper position, and the male cutting roller 62 is in the rear lower position, or their positions are reversed. A upper tensioning roller 63 is installed on the inlet side of the film 0, and a lower tensioning roller 64 is installed on the outlet side. The installation method is also a prior art; there are several raised blocks 65 on the male cutting roller 62, and there are several recessed grooves 66 on the female cutting roller 61. The raised blocks 65 and the recessed grooves 66 are matched. They cooperate with each other to form a punching knife. The cooperation between the two is like the meshing between gears. After the film 0 is cut by their cooperation, holes are formed, and the cut waste falls into the waste recycling device 8 below:

[0109] The waste recycling device 8 includes a blanking hopper 801. Above the blanking hopper 801 is a waste hopper 802, which is located below the hinged part of the female cutting roller and the male cutting roller 62 to receive the cut waste. Two waste extrusion rollers 803 are installed beside the waste hopper 802. The lower end of the blanking hopper 801 is connected to an inclined blanking channel 804. There are two mutually meshing rotating extrusion rollers 805 in the blanking channel 804. Below the rotating extrusion rollers 805 are a fixed knife 806 and a crushing knife roller 807 that cooperate with each other. The crushing knife roller 807 has moving knives. The fixed knife 806 and the moving knives cooperate with each other to crush the waste, and then pass through the material extraction fan 808 below the crushing knife roller 807. The outlet of the material extraction fan 808 is connected to a cyclone separator 810 through a first pipeline 809. The cyclone separator 810 separates the gas material in the waste. A feeding fan 811 is connected to the lower end of the cyclone separator 810. The separated waste is extracted by the feeding fan 811 and then connected to the upper end of the waste feeding device 102 through a second pipeline 812.

[0110] In front of the waste recycling device 8 is a cutting device 7. The cutting device 7 is a prior art, and its function is to cut the film to the required width. Guide rollers 71 are installed before and after the cutting device 7, and a turning roller 72 is installed below the guide rollers 71. The cut waste film 00 (both on the left and right sides) passes through the guide roller and the turning roller 72 and enters the waste extrusion rollers 803, then enters the rotating extrusion rollers 805 in the blanking channel 804, and finally is crushed by the crushing knife roller 807 and the fixed knife 806 for reuse.

[0111] Since the distance between the turning roller 72 and the blanking channel 80431 is relatively far, several waste supporting rollers 73 are also provided between the turning roller 72 and the waste extrusion rollers 803 to support the cut waste film 00.

[0112] A baffle 813 is also installed above the rotating extrusion rollers 805 to help the waste pass between the rotating extrusion rollers 805.

[0113] After the above production and processing process, the film 0 becomes the PVC reinforced fascia 000.

[0114] Following closely after the PVC reinforced fascia production line are a first traction machine 9, a tension control device 10, and a second traction machine 11. That is to say, the PVC reinforced fascia cut by the cutting device 7 is pulled by the first traction machine 9, enters the tension control device 10, and then enters the second traction machine 11 to be pulled into the next process. The first traction machine 9 and the second traction machine 11 are both prior arts, which play a role of pulling and guiding, and generally consist of two upper and lower rollers. However, in this embodiment, the first traction machine 9 has two sets of upper and lower rollers.

[0115] The tension control device 10 includes a buffer device and a set of tension rollers 1001 before and after the buffer device. The set of tension rollers 1001 includes a number of tension rollers made of pressure-sensitive materials. The PVC reinforced fascia sequentially passes around these tension rollers. These tension rollers are of a hollow structure and are internally provided with pressure sensors, and these pressure sensors are electrically connected to the PLC control system.

[0116] The PVC reinforced fascia 000 enters the buffer device after passing around the front set of tension rollers 1001. The buffer device includes a number of sets of columns 1002. These columns 1002 are of a hollow structure and are provided with long holes thereon. The long holes of each set of columns 1002 correspond to each other inwardly; a screw rod 1003 that can only rotate axially is installed inside the column 1002. The two screw rods 1003 are driven to rotate synchronously by a motor 1004. The motor 1004 can be installed at the upper end of the column 1002 or at the lower end of the motor 1004. The screw rod 1003 is threadedly connected to a threaded cylinder 1005. A moving roller 1006 is fixedly installed between two corresponding threaded cylinders 1005. The moving roller 1006 is composed of two parts: a non-rotating fixed shaft 10061 and a rotating roller 10062 sleeved around the outer periphery of the fixed shaft 10061. The rotating roller 10062 can rotate around the fixed shaft 10061. A number of fixed rollers 1007 are installed above the moving roller 1006. The fixed rollers 1007 and the moving roller 1006 are arranged in an alternating manner, so that it is convenient for the PVC reinforced fascia 000 to sequentially pass around.

[0117] Two folding rollers 1008 are respectively installed on the two frontmost columns 1002 and the two rearmost columns 1002, which is convenient for the PVC reinforced fascia 000 to enter and exit the buffer device and to connect with the two sets of tension rollers 1001.

[0118] Immediately following the second tractor 11 is the PVC foam board production line 12. Its material mixing device, stirring device, main machine, etc. are all located on the side of the color composite environmental protection board production line. That is to say, the main part of the PVC foam board production line 12 is perpendicular to the color composite environmental protection board production line. The PVC foam board production line 12 is basically the same as the prior art. The difference is the mold it uses, which we call the intermediate layer composite mold 120. In addition, a stress relieving device is added at the end of the PVC foam board production line (only this mold and the stress relieving device are located on the color composite environmental protection board production line). Other unchanged parts will not be elaborated here:

[0119] The intermediate layer composite die 120 includes: upper and lower parts that are mirror images of each other and are aligned together. Each part is provided with a material channel. The material channel includes a connected feeding channel 1201, a diversion area 1202, a pressure stabilizing area 1203, a pressure boosting buffer area 1204, a die sizing area 1205, and a pressure release combination area 1206. The inlet of the material channel is located on the side of each part and is docked with the outlet of the extruder of the PVC foam board production line 12. The pressure release combination areas 1206 of the upper and lower parts are aligned together to form the thickness of the PVC foam board; after the upper and lower parts are aligned together, there is a gap for the PVC reinforcing fascia 000 to pass through; corresponding to the positions of the pressure boosting buffer area 1204, the die sizing area 1205, and the pressure release combination area 1206 are thickness adjustment blocks 1207. At the front end of the thickness adjustment blocks 1207, the core layer and the foam composite cooling block 1208 are installed by bolts or the like. The distance between the two core layer and foam composite cooling blocks 1208 is the thickness of the PVC foam board. There is a cavity between the thickness adjustment blocks 1207 and the core layer and foam composite cooling block 1208, forming a front isolation area 1209.

[0120] The upper and lower parts of the intermediate layer composite die are each composed of a first part 1210 and a second part 1211. The second part 1211 is sleeved inside the first part 1210. The material channel is jointly formed after the first part 1210 and the second part 1211 are aligned together. An isolation area 1213 is formed between the first part 1210 and the second part 1211 through a support block 1212 to prevent heat loss.

[0121] A fixing block 1214 is installed on the first part 1210, and a number of adjusting bolts 1215 that can only rotate axially are installed on the fixing block 1214. The adjusting bolts 1215 are threadedly connected to the thickness adjustment blocks 1207.

[0122] Heating rods 1216 are installed in the upper and lower parts respectively.

[0123] Immediately following the intermediate layer composite die are the sizing table and the moving bracket 1217. The moving bracket 1217 is a prior art and is composed of two parts for maintenance. One part is located on a guide rail and can slide on the guide rail, and its front end can be lifted. The detailed structure will not be elaborated; then there is the stress relieving device. The stress relieving device includes ten groups of stress relieving roller groups. Each group of stress relieving roller groups includes a fixed stress relieving roller 1218 and an adjustable stress relieving roller 1219. Both the fixed stress relieving roller 1218 and the adjustable stress relieving roller 1219 are metal rollers.

[0124] Immediately following the stress relieving device is the third tractor 13. There is a bracket 1220 between the stress relieving device and the third tractor 13. The third tractor 13 is composed of eight groups of traction rubber roller groups 1301 to facilitate the forward traction of the PVC foam board.

[0125] Then there is the first longitudinal cutting machine 14, which cuts the PVC foam board into the required width.

[0126] Further forward is the facial mask production line 15: that is, the color facial mask production line, which is the same as the production process of ordinary PVC films and belongs to the prior art. Its main part is perpendicular to the color composite environmental protection board production line, and the facial mask composite die 150 and the facial mask calender are located on the color composite environmental protection board production line. The difference lies in the structures of the facial mask composite die 150 and the facial mask calender: the facial mask composite die is an integral block, and a foam board channel 1501 and a facial mask material channel are provided inside this integral block. The inlet of the facial mask material channel is located on the upper surface of the integral block. The facial mask material channel includes a blanking channel 1503, a material diversion area 1504, and a cooling area 1505; the foam board channel 1501 runs through the front and back of the integral block. At the inlet end of the foam board channel 1501, two feeding rollers 1502 are installed, and the mouth of the foam board channel 1501 inside the feeding roller 1502 is in a flared shape to facilitate the entry of the foam board; several mold temperature pipes 1506 are provided inside the integral block, and the mold temperature pipes 1506 are connected to a mold temperature machine 1507 for heating up. Part of the mold temperature pipes 1506 are horizontally arranged behind the material diversion area 1504, and the other part is arranged vertically in front of the material diversion area 1504; a nitrogen cooling pipe 1508 is provided above the cooling area 1505, and the nitrogen cooling pipe 1508 is connected to a nitrogen generator 1509 for cooling down.

[0127] The facial mask calender has two groups of facial mask calender roller groups 1510, and a facial mask supporting roller 1511 is provided between the two groups of facial mask calender roller groups 1510.

[0128] The PVC foam board with the color facial mask laminated on it comes out of the facial mask calender, then passes through another moving bracket 1217 and then reaches the laminating machine 16 for laminating. The laminating machine 16 is the prior art and will not be elaborated here.

[0129] After film covering, it comes to the crawler tractor 17. The crawler tractor 17 includes a frame 1701 and two sets of upper and lower crawlers 1702. The colored PVC foam board after film covering passes through between the two sets of crawlers 1702. Among them, the lower set of crawlers 1702 is fixed on the frame 1701 and cannot move up and down, while the upper set of crawlers 1702 can move up and down. The structures of the two sets of crawlers 1702 are the same. They both include a driving shaft 1703 and a driven shaft 1704. The driving shaft 1703 and the driven shaft 1704 of the lower set of crawlers 1702 are installed on the frame 1701, and the driving shaft 1703 and the driven shaft 1704 of the upper set of crawlers 1702 are installed on a frame 1705. Four transmission gears 1706 are respectively installed on the driving shaft 1703 and the driven shaft 1704. Four transmission chains 1707 are provided between the transmission gears 1706 corresponding in position on the driving shaft 1703 and the driven shaft 1704. One group consists of two transmission chains 1707, and several rubber plates 1708 are installed between each group of transmission chains 1707. Cylinders 1709 with their output ends facing upward are installed on the frame 1701. There are two cylinders 1709 on the left and right. Longitudinal columns 1710 are installed beside the cylinders 1709. The output end of the cylinder 1709 is hinged to a crank 1711. The tops of the crank 1711 and the longitudinal column 1710 are both U-shaped. A transmission arm 1712 is installed between the top of the longitudinal column 1710 and the top of the crank 1711. The two ends of the transmission arm 1712 are also U-shaped. One end of the transmission arm 1712 is hinged to the U-shaped of the longitudinal column 1710 through a hinge shaft 1713. There is a middle shaft 1714 in the middle of the frame 1705. Both ends of the middle shaft 1714 are respectively hinged to the crank 1711 and the transmission arm 1712. The transmission arm 1712 is of a grooved plate type. There is a pull rod 1715 between the hinge shaft 1713 and the middle shaft 1714. There are two ways to connect the two ends of the pull rod 1715 to the hinge shaft 1713 and the middle shaft 1714 respectively: One way is that the two ends of the pull rod 1715 are respectively sleeved on the hinge shaft 1713 and the middle shaft 1714, and its two ends respectively rotate around the hinge shaft 1713 and the middle shaft 1714; Another way is that neither the hinge shaft 1713 nor the middle shaft 1714 can rotate. Two ear plates 1716 are respectively installed on the hinge shaft 1713 and the middle shaft 1714. A rotating pin shaft 1717 is installed between the two ear plates 1716. Then, holes are drilled on the rotating pin shaft 1717. The two ends of the pull rod 1715 respectively pass through the two holes, and then nuts 1718 are used to fix on both sides of the holes.

[0130] At this time, the width of the colored PVC foam board coming out is the standard width. However, some customers need different widths. Therefore, a second longitudinal cutting machine 18 is installed at this time. This second longitudinal cutting machine 18 is also prior art. It has several cutting knives, which are selected according to specific situations and cut into corresponding widths according to the needs of users.

[0131] After the width is cut, the length cutting is to be carried out. Therefore, following is a horizontal cutting machine 19. After the horizontal cutting machine 19 finishes cutting, it is conveyed by a conveying device 20, and then carried and stacked by a manipulator 21, which is also called palletizing. Since during the above cutting process, the positions of the cut colored PVC foam boards are not fixed, for the convenience of manipulator operation and the regularity of stacking, it is necessary to convey these colored PVC foam boards, that is, colored composite environmental protection boards, to the specified positions through the conveying device 20. Therefore, the following design is specifically made: The conveying device 20 includes a conveying frame 2001, and a number of conveying rotating shafts 2002 are installed on the conveying frame 2001. These conveying rotating shafts 2002 are evenly distributed radially. Of course, the radius of the circle where this radial even distribution is located is very large, and the fan-shaped effect presented by these conveying rotating shafts 2002 is not very obvious. A conveying motor 2003 is installed below the conveying frame 2001. The output end of the conveying motor 2003 is connected to a conveying longitudinal shaft 2004 through chain drive. This conveying longitudinal shaft 2004 is parallel to the advancing direction of the colored composite environmental protection board. These conveying longitudinal shafts 2004 are respectively connected to the conveying rotating shafts 2004 through a number of transmission belts 2005.

[0132] The working process is as follows:

[0133] First, start the entire production line, including the PLC control system. All the materials for producing PVC reinforced fascia 000 are put into the initial feeding device 101 according to the ratio specified by the process, enter the first-stage stirring tank 104 through the feeding belt 103 for stirring, then enter the second-stage stirring tank 105 for stirring, and then enter the main machine 2. After steps such as heating up and shearing, it enters the extruder, is extruded from the extruder into the mold, comes out and forms after heating up and stabilizing pressure in the mold to become film 0, then passes through the pre-cooling roller 4 for pre-cooling, is flattened and calendered by the four-roll forming machine and then enters the punching device 6. After being cut by the female cutting roller 61 and the male cutting roller 62, a number of holes are cut out. The cut waste materials enter the feeding hopper 801 through the waste hopper 802;

[0134] After the film 0 comes out of the punching device 6, it enters the front cutting device 7 for cutting. The cut finished products continue to move forward and enter the first tractor. The cut side materials, that is, the waste film 00, turn back backward through the guide roller 71 and the turning roller 72, enter between the waste extrusion rollers 803, then enter the hopper 801, and enter between the two rotating extrusion rollers 805. Together with the waste falling from the punching device 6, it is conveyed to the fixed knife 806 and the crushing knife roller 807 through the high-speed rotation (up to 2000 revolutions per minute) of the rotating extrusion rollers 805 for crushing. The crushed materials are blown out by the extraction fan 808 and enter the rotating separation cylinder through the first pipeline 809. The rotating separation cylinder separates the gas materials in the crushed materials. The gas is discharged, and the crushed materials fall and enter the feeding fan 811. They are sent back to the waste feeding device 102 through the feeding fan 811 and the second pipeline 812, and then enter the first-stage mixing tank 104 through the conveyor belt to be mixed with the initial materials, and then enter the second-stage mixing tank 105 for mixing.

[0135] The cut PVC reinforcing fascia 000 passes through the first tractor 9, the tension control device 10, and the second tractor 11 in sequence and then enters the intermediate layer lamination die. The tension control device 10 adjusts the tightness of the PVC reinforcing fascia 000 at any time through the pressure sensor. The materials for producing the PVC foam board are also put into the mixing tank in its production line, and then are extruded into the material channel of the intermediate layer lamination die through the extruder. In the material channel, they are divided into upper and lower parts through the shunt area 1202, and then pass through the pressure stabilizing area 1203, the pressure increasing buffer area 1204, and the die sizing area 1205, and the pressure is completely released at the pressure release and combination area 1206, reaching the upper and lower surfaces of the PVC reinforcing fascia 000 respectively. The materials in the upper and lower material channels are fused together through the holes in the PVC reinforcing fascia 000, making the foam board layer and the PVC reinforcing fascia 000 into a firm whole. After being cooled by the core layer and the foam lamination cooling block 1208, it is stress-relieved by the stress-relieving roller device. After being pulled by the third tractor 13, it is trimmed and cut by the first longitudinal cutting machine 14 into a standard width and enters the mask lamination die of the mask production line 15. At this time, the colored materials of the mask production line 15 have also entered the mask lamination die through its mixing device and extruder, etc. In the mask lamination die, the colored materials are laminated onto the upper surface of the PVC and integrated into one body through heating and cooling, and then enter the laminating machine 16 to be covered with a protective film after being calendered by the mask calender. At this time, the colored laminated environmental protection board has been produced, but it still does not meet the user's requirements. Therefore, it now enters the second longitudinal cutting machine 18 through the crawler tractor 17 (during this process, the height of a set of crawlers above is adjusted by the cylinder to adjust the pressure on the colored laminated environmental protection board), is cut into the corresponding width according to the user's needs, and then is cut off by the transverse cutting machine 19 into a standard or required length. Finally, it is conveyed to the specified position through the conveying device 20 (through the cooperation of the radially evenly distributed conveying rotating shafts), and is transferred and stacked by the manipulator 21.

[0136] Except for the technical features described in the specification, the rest of the technical features are known technologies to those skilled in the art.

Claims

1. A color composite environmental protection board production line, characterized in that, It includes a PLC control system, a PVC reinforced fascia production line (01), a first tractor (9), a tension control device (10), a second tractor (11), a PVC foam board production line (12), a third tractor (13), a first longitudinal cutting machine (14), a facial mask production line (15), a laminating machine (16), a crawler tractor (17), a second longitudinal cutting machine (18), a transverse cutting machine (19), a conveying device (20) and a manipulator (21). Among them, The PVC reinforced fascia production line (01) includes a stirring device (1), a main machine (2), a film die (3), a pre-cooling roller (4), a forming machine (5), a punching device (6), a cutting device (7) and a waste recycling device (8): The stirring device (1) includes an initial feeding device (101) and a waste feeding device (102). Below the initial feeding device (101) and the waste feeding device (102), there are a primary stirring tank (104) and a secondary stirring tank (105); The forming machine (5) is a four-roller forming machine, including: a fixed calendering and cooling roller (51) and a lower adjustable calendering and cooling roller (52) below it. In front of the fixed calendering and cooling roller (51), there are also two horizontally adjustable cooling rollers (53). These two horizontally adjustable cooling rollers (53) are horizontally arranged with the fixed calendering and cooling roller (51); The punching device (6) includes an inclined arrangement of a female cutting roller (61) and a male cutting roller (62). On the inlet side of the film, there is an upper tensioning roller (63), and on the outlet side, there is a lower tensioning roller (64); Below the junction of the female cutting roller (61) and the male cutting roller (62) is the waste recycling device (8), including a feeding hopper (801). Above the feeding hopper (801), there is a waste hopper (802). The lower end of the feeding hopper (801) is connected to a feeding channel. Inside the feeding channel, there are rotating extrusion rollers (805) that mesh with each other. Below the rotating extrusion rollers (805), there are a fixed knife (806) and a crushing knife roller (807) that cooperate with each other. At the lower end of the feeding channel, there is a material extraction fan (808); At the upper end of the feeding channel, there are also two waste extrusion rollers (803); The outlet end of the material extraction fan (808) is connected to a cyclone separator (810) through a first pipeline (809). At the lower end of the cyclone separator (810), there is a feeding fan (811). The feeding fan (811) is connected to the upper end of the waste feeding device (102) through a second pipeline (812); Before and after the cutting device (7), there are guide rollers (71) respectively. Below the guide rollers (71), there are turning rollers (72); The PVC foam board production line (12) includes an intermediate layer lamination die and a stress relief device. The intermediate layer lamination die includes: upper and lower parts that are mirror images of each other and are brought together. After being brought together, there is a gap between the upper and lower parts. Each part is provided with a material channel, and the material channel includes a connected feeding channel (1201), a shunt area (1202), a voltage stabilizing area (1203), a pressure boosting buffer area (1204), a die sizing area (1205), and a pressure release combination area (1206). The inlet of the material channel is located on the side of each part. Thickness adjustment blocks (1207) are provided corresponding to the positions of the pressure boosting buffer area (1204), the die sizing area (1205), and the pressure release combination area (1206). A core layer and a foam lamination cooling block (1208) are installed at the front end of the thickness adjustment block (1207); an isolation area (1213) and heating rods (1216) are provided in each part; The facial mask production line (15) includes a facial mask lamination die and a facial mask calender. The facial mask lamination die is an integral block, and the integral block is provided with a foam board channel (1501) and a facial mask material channel. The inlet of the facial mask material channel is located on the upper surface of the integral block. The facial mask material channel includes a feeding channel, a material shunt area (1504), and a temperature reduction cooling area (1505); two entry rollers (1502) are provided at the entry end of the foam board channel (1501); a number of mold temperature pipes (1506) are provided in the integral block, and the mold temperature pipes (1506) are connected to a mold temperature machine (1507). A part of the mold temperature pipes (1506) are horizontally arranged behind the material shunt area (1504), and another part are arranged vertically in front of the material shunt area (1504); a nitrogen cooling pipe (1508) is provided above the temperature reduction cooling area (1505), and the nitrogen cooling pipe (1508) is connected to a nitrogen generator (1509); The tension control device (10) includes a buffer device and tension roller groups (1001) before and after the buffer device. The buffer device includes a number of groups of columns (1002). A moving roller (1006) is provided on each group of columns (1002), and a fixed roller (1007) is provided above the moving roller (1006). The fixed roller (1007) and the moving roller (1006) are arranged alternately; the tension roller groups (1001) include a number of tension rollers made of pressure-sensitive materials. The tension rollers are of a hollow structure and are internally provided with pressure sensors; Each part of the intermediate layer lamination die is composed of a first part (1210) and a second part (1211). The second part (1211) is sleeved inside the first part (1210). The material channel is jointly formed by the first part (1210) and the second part (1211). The isolation area (1213) is formed between the first part (1210) and the second part (1211) through a support block (1212).

2. The color composite environmental protection board production line according to claim 1, characterized in that, The lower end of the initial feeding device (101) is provided with a spiral auger (107), and the lower ends of the waste feeding devices (102) are respectively provided with conveyor belts (103). The ends of the conveyor belts (103) and the spiral auger (107) are located above the primary mixing tank (104).

3. The color composite environmental protection board production line according to claim 1, characterized in that, The stirring shaft (106) of the secondary mixing tank (105) is arranged horizontally.

4. The color composite environmental protection board production line according to claim 1, characterized in that, A plurality of lower adjusting rollers (54) are provided below the horizontal adjusting cooling roller (53).

5. The color composite environmental protection board production line according to claim 4, characterized in that, A bending roller (55) is provided in front of the lower adjusting roller (54).

6. The color composite environmental protection board production line according to claim 1, characterized in that, A baffle plate (813) is provided above the rotary extrusion roller (805).

7. The color composite environmental protection board production line according to claim 1, characterized in that, A waste supporting roller (73) is provided between the waste extrusion roller (803) and the turning roller (72).

8. The color composite environmental protection board production line according to claim 1, characterized in that, The film die (3) is fixedly connected by upper and lower die bodies, and then forms a channel (31), a runner (32), a U-shaped steady flow area (33), a buffer pressurizing area (34) and a die head area (35); heat-conducting oil channels (36) are respectively provided at the front ends of the upper and lower die bodies.

9. The color composite environmental protection board production line according to claim 7, characterized in that, Among them, the upper die body is provided with die head thickness adjusting screws (38).

10. The color composite environmental protection board production line according to claim 7, characterized in that, Electric heating rods (37) are respectively provided in the upper and lower die bodies.

11. The color composite environmental protection board production line according to claim 1, characterized in that, The column (1002) is a hollow structure with long strip holes, and a screw rod (1003) that can only rotate axially is arranged therein. The screw rod (1003) is threadedly connected to a threaded cylinder (1005). The moving roller (1006) includes a fixed shaft (10061) and a rotating roller (10062). The rotating roller (10062) can rotate around the fixed shaft (10061). Both ends of the fixed shaft (10061) are fixed on the threaded cylinder (1005); the screw rod (1003) is driven to rotate by a motor (1004); the pressure sensor and the motor (1004) are respectively electrically connected to the PLC control system.

12. The color composite environmental protection board production line according to claim 1, characterized in that, A front isolation area (1209) is provided between the thickness adjustment block (1207) and the core layer and foaming composite cooling block (1208).

13. The color composite environmental protection board production line according to claim 1, characterized in that, A fixing block (1214) is installed on the first part (1210), and a plurality of adjusting bolts (1215) that can only rotate axially are installed on the fixing block (1214). The adjusting bolts (1215) are threadedly connected to the thickness adjustment block (1207).

14. The color composite environmental protection board production line according to claim 1, characterized in that, The stress relieving device includes ten groups of stress relieving roller groups. Each group of stress relieving roller groups includes a fixed stress relieving roller (1218) and an adjusting stress relieving roller (1219). Both the fixed stress relieving roller (1218) and the adjusting stress relieving roller (1219) are metal rollers.

15. The color composite environmental protection board production line according to claim 1, characterized in that, The third tractor (13) includes eight groups of traction rubber roller groups (1301).

16. The color composite environmental protection board production line according to claim 1, characterized in that, The mouth of the foaming board channel (1501) inside the feeding roller (1502) is in a flared shape.

17. The color composite environmental protection board production line according to claim 1, characterized in that, The facial mask calender has two groups of facial mask calender roller groups (1510), and a facial mask supporting roller (1511) is provided between the two groups of facial mask calender roller groups (1510).

18. The color composite environmental protection board production line according to claim 1, characterized in that, The crawler traction machine (17) comprises a frame (1701) and two sets of upper and lower crawlers (1702); the crawlers (1702) comprise a driving shaft (1703) and a driven shaft (1704); four transmission gears (1706) are respectively mounted on the driving shaft (1703) and the driven shaft (1704); a transmission chain (1707) is arranged between the corresponding transmission gears (1706) on the driving shaft (1703) and the driven shaft (1704); two transmission chains (1707) form a group; a plurality of rubber plates (1708) are installed between each group of transmission chains (1707); a cylinder (1709) with an output end facing upward is installed on the frame (1701); the cylinder (1709) is provided on each side; A longitudinal column (1710) is installed next to the cylinder (1709), the output end of the cylinder (1709) is hinged to a crank (1711), the top ends of the crank (1711) and the longitudinal column (1710) are both U-shaped, the U-shaped top end of the longitudinal column (1710) is provided with a hinge shaft (1713), a transmission arm (1712) is hinged on the hinge shaft (1713), the transmission arm (1712) is a groove plate type, the other end of the transmission arm (1712) and the upper end of the crank (1711) are hinged on a central axis (1714), the central axis (1714) is fixed to the middle of a frame (1705), and the driving shaft (1703) and the driven shaft (1704) of the upper crawler (1702) are installed on the frame (1705).

19. The color composite environmental protection board production line according to claim 18, characterized in that, Two ear plates (1716) are fixedly provided on the hinge shaft (1713) and the middle shaft (1714), respectively. A rotating pin (1717) is installed between the two ear plates (1716). Holes are drilled on the rotating pin (1717), and two ends of a pull rod (1715) pass through the two holes respectively, and then nuts (1718) are used to tighten the two sides of the holes.

20. The color composite environmental protection board production line according to claim 1, characterized in that, The conveying device (20) comprises a conveying frame (2001), a plurality of conveying rotating shafts (2002) are arranged on the conveying frame (2001), a conveying motor (2003) is arranged below the conveying frame (2001), the conveying motor (2003) is transmission-linked to a conveying longitudinal shaft (2004), and the conveying longitudinal shaft (2004) is transmission-linked to the conveying rotating shafts (2002) respectively through a plurality of transmission belts (2005); the conveying rotating shafts (2002) are evenly distributed in a radial shape.

Images