Automatic SMC-sheet compression molding production line, and automatic material conveying method therefor

Abstract

The present invention relates to the technical field of compression molding production lines, and in particular relates to an automatic SMC-sheet compression molding production line, and an automatic material conveying method therefor. The automatic SMC-sheet compression molding production line sequentially comprises an infeed conveyor system, a molding machine and an outfeed conveyor system, wherein the infeed conveyor system comprises a peeling and clamping mechanism, a feeding and cutting mechanism, a first lifting platform, a rotary transfer table, a second lifting platform and a mobile feeding trolley, which are sequentially arranged, and the outfeed conveyor system comprises a gripping mechanism, a conveying platform and a transition platform, which unload and output compression-molded products. By means of the automatic SMC-sheet compression molding production line and the automatic material conveying method therefor in the present invention, an automatic production process for SMC sheets, which involves unfolding, peeling, flattening, cutting, quantitative weighing, feeding and outputting, can be realized, thereby improving the production efficiency, and reducing the labor intensity.

Description

An SMC sheet molding automated production line and automated material conveying method thereof Technical Field

[0001] The present invention relates to the technical field of molding production lines, and in particular to an SMC sheet molding automated production line and an automated material conveying method thereof. Background Art

[0002] SMC material is a glass fiber material. After special processing, it has the characteristics of high toughness, high strength, and strong corrosion and explosion resistance. It can replace metal in some special fields. The leftover materials after processing can be easily collected and reused, reducing waste and low cost. It is now widely used in national defense, military industry, civil defense and other fields.

[0003] SMC materials are produced by chemical synthesis. Before being processed, the material is soft, the layers are easily sticky, and it has a strong pungent odor. The construction environment is harsh, which brings great difficulties to subsequent processing. SMC sheet raw materials are generally double-sided film coils for the convenience of transportation and storage. When entering the molding production, the coils need to be unfolded, the film is torn, flattened, and cut into a certain length. Then, according to the material consumption requirements of each molded product on the molding machine, a certain amount of SMC sheet is weighed and fed into the mold cavity to enter the mold. Before the aforementioned SMC sheet enters the molding machine, multiple processes and special settings are required to complete different process steps respectively. The degree of automation of the supporting settings of each process has a great impact on the degree of automation and production efficiency of the entire molding production line. Therefore, it is necessary to develop a dedicated automation level and high production efficiency automation production line for the above-mentioned molding automation production line based on SMC sheet as raw material to meet the automation feeding requirements of different molded products. Summary of the Invention

[0004] Aiming at the demand for material transportation in the molding production using SMC as raw material in the prior art, the present invention first provides an SMC sheet molding automated production line to realize the automated production process of SMC sheets from coil unrolling, film tearing, flattening, shearing, quantitative weighing, feeding and discharging.

[0005] The object of the present invention is achieved in this way. An SMC sheet molding automated production line comprises a feeding and conveying system, a molding machine and a discharging and conveying system in sequence. The feeding and conveying system comprises a film tearing and clamping mechanism, a feeding and shearing mechanism, a first lifting platform, a rotating material transfer platform, a second lifting platform and a mobile feeding trolley arranged in sequence. The discharging and conveying system comprises a gripping mechanism, a conveying platform and a transition platform for discharging and outputting the compression-molded products. The characteristics are as follows:

[0006] The film tearing and clamping mechanism includes a film tearing machine and a pressure roller. The film tearing machine includes two upper and lower clamping rollers for clamping the SMC sheet, and film reels symmetrically arranged up and down behind the clamping rollers. The film reels are driven by synchronous drive mechanisms. The discharging direction of the clamping rollers is sequentially provided with a transition conveying roller and the pressure roller. The pressure rollers are provided in parallel up and down for clamping the sheet.

[0007] The feeding and shearing mechanism includes a feeding gantry, on which a clamping claw for clamping and pulling the sheet material is provided along the feeding direction, a shearing blade for cutting the sheet material to a fixed length, a weighing platform for temporarily storing and stacking the sheared sheets, and a plurality of first pushing rollers arranged on the weighing platform for pushing the weighed sheet material to the next station;

[0008] A lifting device is provided on the lower side of the first lifting platform and the second lifting platform for lowering the height of the rotating material transfer platform when the rotating material transfer platform rotates and switches the angle to avoid interference with the corners of the rotating material transfer platform;

[0009] The rotary material transfer platform comprises a rotary platform, a rotary drive device and a slide rail drive mechanism for driving the rotary platform to move horizontally are provided at the bottom center of the rotary platform, and a first material storage area and a second material storage area are provided on the surface of the rotary platform, respectively for receiving and temporarily storing sheets conveyed from the previous process;

[0010] The first material storage area is used to receive the incoming materials delivered by the feeding and shearing mechanism, and the second material storage area is used to temporarily store the incoming materials pushed by the first material storage area. The surface of the first material storage area is provided with a plurality of spaced rows of short push rollers for receiving the incoming materials from the front. The space between the two ends of each row of short push rollers is provided with a second push roller, and the second push roller is arranged perpendicular to the short push roller. The surface of the second material storage area is provided with a third push roller parallel to the second push roller. Each group of the first push roller, the second push roller, the third push roller and the short push roller is respectively provided with a synchronous drive mechanism;

[0011] The mobile feeding trolley can be translated laterally and can be stretched and retracted along the conveying direction of the production line to feed materials, and is used to receive the sheets pushed by the rotary material transfer table and push the sheets into the compression molding machine.

[0012] The SMC sheet molding automation production line of the present invention uses SMC coils as raw materials, and is sequentially provided with a film tearing and clamping mechanism for unfolding the coils, tearing the films, clamping and flattening the coils, and then cutting the coils to a fixed length through a feeding and shearing mechanism, and weighing the sheets on a stacking and weighing platform. After reaching the predetermined SMC sheet raw material dosage for molding, the stacked sheets are conveyed through a first lifting platform, a rotary material transfer platform, a second lifting platform and a mobile material feeding trolley into a mold cavity of a molding machine for compression molding, and then the molded products are conveyed to a conveying platform and a transition platform through a material grabbing mechanism, completing an automated molding process. Each process link is sequentially performed automatically with little human intervention, and automated loading, feeding, cutting, flipping, feeding into a mold area, and product discharging are performed in an orderly manner, thereby improving the on-site working environment, reducing the intensity of manual operation, and improving work efficiency. The invention has high economic benefits, is convenient for realizing intelligent management, and has good market prospects.

[0013] In order to accurately balance the amount of raw materials required for each molded product, the feeding and shearing mechanism is laterally provided with a crushed material stacking table and a feeding manipulator for weighing and adding small pieces of material to the weighing platform.

[0014] The two guide wheels are connected to each other, and the two guide wheels are connected to each other with a plurality of axes respectively.

[0015] To facilitate shearing of the material sheet, the shear blade is connected to the feed yoke through a blade holder. A second crossbeam is provided at one end of the feed yoke close to the film tearing clamping mechanism. The blade holder is connected to the second crossbeam through a transverse guide rail slider mechanism. The second crossbeam is also connected to a screw nut mechanism for driving the transverse guide rail slider mechanism to move.

[0016] In order to facilitate the first material storage area on the rotating material transfer platform to receive and convey materials, the rotating platform includes a rectangular bottom frame, and the four sides of the bottom frame are respectively provided with a first frame plate and a second frame plate, the length direction of the first frame plate is perpendicular to the axial direction of the second push roller and the third push roller, and the first frame plate wall is correspondingly provided with a plurality of first support holes for rotatably supporting the second push roller and the third push roller, and the lower side of the first material storage area is provided with a lifting bottom plate for supporting and installing the push short roller, and the lifting bottom plate is correspondingly provided with a plurality of groups of short roller support plates, each group of short roller support plates extends vertically from between adjacent second push rollers, and the short roller support plates corresponding to the push short rollers Support shaft holes are respectively provided on the support plates; a guide lifting mechanism is provided between the bottom of the lifting base plate and the bottom frame of the rotating platform; on the first storage area, when the pushing short roller installed on the lifting base plate is raised to a height higher than the second pushing roller by the guide lifting mechanism, the rolling motion of the pushing short roller can receive the stacked sheet materials delivered from the previous process. After all the stacked sheet materials fall into the first storage area, the pushing short roller descends to a height lower than the second pushing roller, and the material falls on the surface of the second pushing roller. The material is reversed and transported to the second storage area through the rolling of the second pushing roller, so as to vacate the first storage area and continue to wait for the next round of incoming materials.

[0017] The driving mechanism that the present invention relates to a gear train which is mounted on a base and has a first end in contact with the first gear and a second end in contact with the gear train, and the driving mechanism can be rotated and rotated to move relative to each other to move the gear train.

[0018] In order to facilitate driving the push rollers to roll synchronously to push the material, the second push roller, the third push roller and the short push roller are driven to push the material synchronously through the sprocket chain synchronization mechanism.

[0019] In order to facilitate synchronously driving the second pushing roller and the third pushing roller to roll synchronously, one end of the second pushing roller and the third pushing roller on the same side extends outward from the corresponding first frame plate, and the end of each roller is connected to a first double sprocket, wherein the same side of a group of adjacent first double sprockets is driven and connected to a reduction mechanism through a drive chain, and the inner and outer sprockets between the remaining adjacent first double sprockets are alternately connected in synchronous transmission in sequence through the first synchronization chain;

[0020] In order to facilitate the driving of the synchronous rolling movement of the push short rollers, the short roller shaft ends on one side of each row of push short rollers extend outward from the outer side of the corresponding short roller support plate, and each short roller shaft end is fixed with a second double sprocket, and the inner sprocket and the outer sprocket of each adjacent second double sprocket are alternately connected with a second synchronous chain in sequence; a synchronous shaft is provided on the lower side of the lifting base plate in a direction parallel to the axial direction of the push short roller, and the length direction of the synchronous shaft spans the bottom side of each row of push short rollers, and synchronous sprockets are provided on the synchronous shaft at positions corresponding to each row of push short rollers, and the two adjacent second double sprocket outer sprockets of each row of push short rollers facing the synchronous shaft are connected to the synchronous sprocket through a driving chain, and the synchronous shaft is connected to a reducer drive.

[0021] In order to facilitate the alignment and reception of materials transported by the rotating material transfer platform, the mobile feeding trolley includes a vehicle body, a combined material platform and a lateral translation mechanism. The lateral translation mechanism includes two lateral guide rails arranged on the lower side of the vehicle body and perpendicular to the sheet conveying direction. Two sets of rollers are correspondingly provided on both sides of the vehicle body. The rollers drive the vehicle body to translate along the lateral guide rails through a reducer to adjust the incoming material position aligned with the rotating platform; the combined material platform is arranged on the upper side of the vehicle body, and the surface of the combined material platform is provided with a fourth pushing roller for receiving and pushing materials, and the axial direction of the fourth pushing roller is parallel to the lateral guide rail; the telescopic feeding mechanism for transferring materials to the mold of the compression molding machine is provided between the combined material platform and the vehicle body.

[0022] To facilitate telescopic feeding, the combined material platform includes an upper material platform and a lower material platform that are telescopic in the upper and lower layers, and the telescopic feeding mechanism includes two first cylinder grooves arranged parallel to the feeding direction on the surface of the vehicle body, and a second cylinder groove is provided in parallel on the outer side of the first cylinder groove, and an extension arm is provided in the vehicle body discharging direction corresponding to the first cylinder groove, and the first cylinder groove extends to the end of the extension arm, and a first cylinder and a second cylinder are respectively installed in the first cylinder groove and the second cylinder groove, and the first cylinder is fixed to the lower side of the lower material platform, and the second cylinder is fixed on the vehicle body, and the end of the telescopic rod of the first cylinder is located at the discharging side edge when the upper and lower material platforms are completely overlapped, and the positions of the corresponding side edges of the upper and lower material platforms and the first cylinder are respectively provided with end connecting ears for connecting the telescopic rod of the first cylinder, and the end of the extension rod of the second cylinder is fixedly connected to the corresponding position of the lower material platform via the lower connecting ear; two rows of guide rails are respectively provided in parallel on the surface of the vehicle body and the surface of the lower material platform, and 2-4 sliders are respectively fixed at intervals on the lower surfaces of the lower and upper material platforms and the positions corresponding to each guide rail.

[0023] In order to facilitate the driving of the mobile feeding trolley to move along the transverse guide rail, two rollers are respectively provided on the front and rear sides of the vehicle body corresponding to each transverse guide rail, and the two rollers on the front side and the two rollers on the rear side are coaxially connected through wheel axles, wherein the front (or rear) wheel axle is connected to the reducer drive mechanism, and the reducer drive mechanism includes a first bevel gear fixed on the wheel axle and a second bevel gear meshing with the first bevel gear, the second bevel gear is connected to the motor, and the motor is fixed to the bottom of the vehicle body.

[0024] The present invention also provides an automated material conveying method based on the above-mentioned SMC sheet molding automated production line. Before starting, the initial state of each process of the SMC sheet molding automated production line is debugged, relevant control parameters are preset, and then the following conveying process is carried out in sequence:

[0025] Step 1: Loading and clamping: Manually feed the SMC sheet between the upper and lower rollers of the film tearing clamping mechanism, and pull the end of the SMC sheet out from between the two rollers. The films on the upper and lower surfaces of the SMC sheet are torn apart along the edge of the end, separated from the sheet surface, and wound onto the film reels at the rear. At the same time, the end of the SMC sheet is pulled between the two pinch rollers, and the distance between the pinch rollers is adjusted to clamp the SMC sheet.

[0026] Step 2, film tearing and feeding process: start the synchronous drive mechanism of the film reel, the clamping roller and the pressure roller to tear the film while conveying the torn SMC sheet forward at a speed v; the SMC sheet is conveyed to the starting end of the feeding gantry;

[0027] Step 3, fixed-length cutting and stacking process: When the SMC sheet is conveyed to the starting end of the feeding gantry, the clamp moves to the edge of the SMC sheet, clamps the sheet, and then the clamp pulls the sheet forward at a speed v to the predetermined position. The tearing and feeding process of step 2 is paused, and the shear blade cuts the SMC sheet to a fixed length, and the cut SMC sheet falls onto the weighing platform. After the shearing is completed, the shear blade returns, and the tearing and feeding process of step 2 continues to start and repeat the aforementioned clamping and pulling of the sheet to the predetermined position, shearing the sheet, and stacking the sheet onto the weighing platform until the difference between the weight measured on the weighing platform and the predetermined weight is less than the weight of a single sheet. The tearing and feeding process is paused again, waiting for the weighing platform to move the material.

[0028] In the fourth step, the feeding robot grabs the SMC scrap materials from the scrap stacking table and puts them on the stacked materials on the weighing platform until the weighing weight deviates from the predetermined weight by less than 500 grams. The first pushing roller on the weighing platform starts to push the stacked materials through the first lifting platform to the rotating platform. At this time, the pushing short roller of the rotating platform rises and starts to rotate to receive and drive the pushed and stacked materials forward until the stacked materials completely enter the first storage area. The pushing short roller stops rotating and descends, and the second pushing roller and the third pushing roller are started at the same time, and the stacked materials are pushed from the first storage area to the second storage area. In this step, when the stacked materials completely leave the weighing platform, the film tearing and feeding process in step 2 continues to start, and the film tearing, fixed-length shearing, stacking of materials on the weighing platform, the robot replenishes scraps, and stacking of materials on the rotating platform are continued until the materials are stacked in the first and second storage areas of the rotating platform. The second pushing roller and the third pushing roller pause rotation.

[0029] Step 5, Rotary Discharging: The first and second lifting platforms are lowered to a certain height to avoid rotation interference. The rotary drive device of the rotary platform is started to rotate the rotary platform 90 degrees. The first and second lifting platforms are raised to be flush with the rotary platform. The second and third push rollers rotate to push the stacked sheets through the second lifting platform to the mobile feeding trolley. The second and third push rollers stop rotating. At the same time, the push roller is raised to wait for the next round of incoming materials.

[0030] Step 6: Move the material into the compression molding machine: The lateral translation mechanism of the mobile feeding trolley drives the combined material table to move along the lateral guide rail to align with the incoming material direction. The fourth push roller starts to receive the stacked sheets conveyed by the rotating material transfer table. When the stacked sheets completely fall into the combined material table, the combined material table moves horizontally along the lateral guide rail to align with the feeding direction of the compression molding machine. The combined material table moves horizontally to push the material to the specified position of the compression molding machine.

[0031] Step 7: The hydraulic forming process is completed by unloading the material into the mold cavity and starting the compression molding machine;

[0032] In step 8, the material grabbing mechanism moves to the mold area of ​​the compression molding machine, clamps and lifts the molded SMC parts, grabs and sends them to the conveying platform from the discharge direction of the compression molding machine, and then moves them to the transition platform for temporary storage.

[0033] By means of the above-mentioned automated material conveying method of the present invention, automated and continuous unwinding, film tearing, flattening, fixed-length cutting, quantitative stacking, weighing, and conveying of stacked sheets of SMC coils can be achieved.

[0034] In order to adapt to different mold cavity structures, in step 6, after the combined material table receives the stacked sheets, one or more guide rails are set along the direction of the horizontal guide rail to feed the material to the compression molding machine in batches. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a general schematic diagram of the SMC sheet molding automated production line of the present invention.

[0036] FIG2 is a schematic diagram of the film tearing clamping mechanism.

[0037] FIG3 is a perspective view of the feeding and shearing mechanism.

[0038] Figure 4 is a schematic diagram of the installation structure of the feeding truss.

[0039] FIG5 is a perspective schematic diagram of the rotary material transfer platform.

[0040] Figure 6 is a schematic structural diagram of the rotary material transfer table (partially cut away from the bottom frame and support plate).

[0041] FIG7 is a schematic diagram of the interior of the rotary material transfer platform.

[0042] FIG8 is a partial cross-sectional schematic diagram of the rotary drive mechanism of the rotary material transfer platform.

[0043] FIG9 is a perspective view of the mobile feeding trolley.

[0044] FIG10 is a schematic diagram of the upper and lower material platforms of the mobile feeding trolley in the state of extending the feeding state.

[0045] FIG11 is a schematic diagram of the bottom side of FIG10 .

[0046] FIG12 is a bottom view of the vehicle body.

[0047] Among them, 1 film tearing machine; 101 film reel; 102 clamping roller; 103 transition conveyor roller; 2 pressing roller; 3 feeding shearing mechanism; 301 feeding yoke; 302 first motor; 303 clamping jaw seat; 304 second motor; 305 first crossbeam; 306 nut seat; 307 second lead screw; 308 longitudinal guide rail; 309 shearing blade; 310 blade holder; 311 wire frame nut mechanism; 312 third motor; 313 slider; 314 weighing platform; 315 first push roller; 316 cylinder; 317 First lead screw; 318 Second crossbeam; 4 First lifting platform; 5 Rotating material transfer platform; 501 First frame plate; 502 Second frame plate; 503 First double sprocket; 504 Synchronous chain; 505 Driving chain; 506 Second push roller; 507 Push short roller; 508 Synchronous chain; 509 Second double sprocket; 510 First material storage area; 511 Third push roller; 512 Short roller support plate; 513 Lifting bottom plate; 514 Guide column; 515 Lifting cylinder; 516 Synchronous shaft; 517 Synchronous Sprocket; 518 drive chain; 519 reducer; 520 second storage area; 521 third push roller; 530 translation base; 531 support plate; 532 flange; 533 slider; 534 guide rail; 535 reduction motor; 536 horizontal cylinder; 537 support bushing; 538 bevel gear ring; 539 support mandrel; 6 second lifting platform; 7 mobile feeding trolley; 701 horizontal guide rail; 702 roller; 703 axle; 704 second bevel gear; 705 first bevel gear; 706 motor; 710 combined material platform; 711 upper material platform; 712 lower material platform; 713 fourth push roller; 715 sprocket drive mechanism; 720 vehicle body; 721 extension arm; 730 telescopic feeding mechanism; 731 first cylinder groove; 732 guide rail; 733 guide rail; 734 slider; 735 second cylinder; 736 lower connecting ear; 737 end connecting ear; 738 first cylinder; 8 compression molding machine; 9 material grabbing mechanism; 10 conveying platform; 11 transition platform; 11 feeding robot; 12 scrap material stacking platform. DETAILED DESCRIPTION

[0048] The SMC sheet molding automated production line and the automated material conveying method thereof of the present invention will be described in detail below with reference to the accompanying drawings. Example 1

[0049] As shown in Figures 1 to 12, there are schematic structural diagrams of the SMC sheet molding automated production line and its main components according to this embodiment.

[0050] As shown in FIG1 , the SMC sheet molding automated production line of this embodiment includes a feed conveying system, a molding machine, and a discharge conveying system in sequence. The feed conveying system includes a film tearing clamping mechanism (1, 2), a feeding and shearing mechanism 3, a first lifting platform 4, a rotating material transfer platform 5, a second lifting platform 6, and a mobile feeding trolley 7, which are arranged in sequence. The discharge conveying system includes a gripping mechanism 9 for unloading and outputting the compression-molded products, a conveying platform 10, and a transition platform 11.

[0051] As shown in Figures 1 and 2, the film tearing clamping mechanism includes a film tearing machine 1 and a pressure roller 2. The film tearing machine 1 includes two upper and lower clamping rollers 102 for clamping the SMC sheet, and a film reel 101 symmetrically arranged up and down behind the clamping roller 102. The film reel 101 is driven by a synchronous drive mechanism to tear the film as the SMC sheet is conveyed and discharged. The discharge direction of the clamping roller 102 is provided with a transition conveying roller 103 and a pressure roller 2 in sequence. The pressure roller 2 is provided with two parallel upper and lower rollers for clamping the sheet, and the upper side of the upper clamping roller 2 is driven by a cylinder to adjust the gap between the upper and lower clamping rollers 2 to adapt to the thickness of the sheet. At the same time, the shaft ends of the two clamping rollers 2 are provided with synchronous drive components to drive the clamping rollers 2 to rotate synchronously, so as to drive the SMC sheet forward to the feeding and shearing mechanism 3 for fixed-length shearing.

[0052] As shown in Figures 3 and 4, the feeding and shearing mechanism 3 includes a feeding gantry 301, on which a clamping jaw seat 303 and a clamping jaw for clamping and pulling the sheet material are provided along the feeding direction, a shearing blade 309 for cutting the sheet material to a fixed length, and a weighing platform 314 for temporarily storing and stacking the sheared sheet material. A plurality of first pushing rollers 305 are arranged on the weighing platform 314 for pushing the weighed sheet material to the next workstation.

[0053] A lifting device is provided on the lower side of the first lifting platform 4 and the second lifting platform 6 for lowering the height of the rotary material transfer platform 5 when the rotary material transfer platform switches the angle so as to avoid interference with the corners of the rotary material transfer platform.

[0054] The rotary material transfer platform 5 comprises a rotary platform, a rotary drive device and a slide rail drive mechanism for driving the rotary platform to move horizontally are provided at the bottom center of the rotary platform, a first material storage area 510 and a second material storage area 520 are provided on the surface of the rotary platform, which are respectively used to receive and temporarily store the sheet materials conveyed by the previous process; the rotary material transfer platform is used to receive incoming materials in batches, and rotate to switch the stacking direction of the materials when discharging. The rotary material transfer platform is provided with a rotary drive device and a slide rail drive mechanism for driving the rotary material transfer platform to move horizontally at the bottom center, wherein the first material storage area 510 is used to receive the sheet materials conveyed by the feeding and shearing mechanism 3 Incoming materials, the second material storage area 520 is used to temporarily store the incoming materials pushed by the first material storage area 510. The surface of the first material storage area 510 is provided with several spaced rows of pushing short rollers 507 for receiving incoming materials from the front, and the spacing space at both ends of each row of pushing short rollers 507 is provided with a second pushing roller 509, the second pushing roller 506 is arranged perpendicular to the pushing short roller 507, and the surface of the second material storage area 520 is spaced apart with a third pushing roller 511 parallel to the second pushing roller 506, and each group of the first pushing roller 305, the second pushing roller 506, the third pushing roller 511 and the pushing short roller 507 are respectively provided with a synchronous drive mechanism.

[0055] Mobile feeding trolley: It can move horizontally and stretch and retract along the conveying direction of the production line to feed materials. It is used to receive the sheets pushed by the rotating material transfer table 5 and push the sheets into the molding machine.

[0056] In order to accurately balance the amount of raw materials required for each molded product, a scrap stacking table 11 and a feeding manipulator 12 are provided on the side of the feeding and shearing mechanism 3 to balance and add small pieces of material to the weighing platform 3.

[0057] As shown in Figures 3 and 4, in order to facilitate the pulling of the sheet head to a certain length position for fixed-length shearing, two rows of longitudinal guide rails 308 are provided on the upper side of the feeding truss 301 along the feeding direction, and sliders 313 are respectively connected to the longitudinal guide rails 308. The sliders 303 are connected to the first crossbeam 305, and a first lead screw 307 is provided below the first crossbeam 305. The two ends of the first lead screw 307 are symmetrically provided with guide threads with opposite rotation directions, and the guide threads are matched with the clamping claw seat 303. The first lead screw 307 is driven by the first motor 304. When the first lead screw 307 rotates, the two clamping claws The spacing between the claw bases 303 can be adjusted relative to each other. The claw base 303 is equipped with a clamping claw driven by a cylinder 306. A nut base 306 is located at the center of the upper side of the first crossbeam 305. A second lead screw 307, axially parallel to the guide rail 308, is supported and connected to the feed gantry 301. The second lead screw 307 is coupled to the nut base 306, and the shaft end of the second lead screw 307 is connected to the second motor 302 via a belt drive mechanism. The slider 303 is equipped with a travel sensor to record the travel of the slider 303 along the longitudinal guide rail 308, thereby monitoring the length of the sheet being pulled out. To facilitate shearing, a shear blade 309 is connected to the feed gantry 301 via a blade holder 310. A second crossbeam 318 is located at the end of the feed gantry 301 near the film tearing clamping mechanism. The second crossbeam 318 is connected to the blade holder 310 via a transverse guide rail and slider mechanism. The second crossbeam 318 is also connected to a lead screw and nut mechanism 311 for driving the transverse guide rail and slider mechanism. The first and second guide rails 318 are used to move the first and second guide rails 319 to move the first and second guide rails 318 to move the first and second guide rails 319 to move the second and second guide rails 319 to move the first and second guide rails 319 to move the second and second guide rails 319 to move the second and second guide rails 319 to move the second and second guide rails 319 to move the second and second guide rails 319 to move the second and second guide rails 319 to move the second and second guide rails 319 to move the second and second guide rails 319 to move the second and second guide rails 319 to move the second and second guide rails

[0058] As shown in Figures 4 to 6, in order to facilitate the first material storage area 510 on the rotary material transfer platform 5 to receive incoming materials from the previous workstation and transport the materials to the second material storage area, the rotary material transfer platform 5 includes a rotary platform, a rectangular bottom frame of the rotary platform, and the four sides of the bottom frame are respectively provided with a first frame plate 501 and a second frame plate 502, the length direction of the first frame plate 501 is perpendicular to the axial direction of the second push roller 506 and the third push roller 511, and a plurality of first support holes for rotatably supporting the second push roller 506 and the third push roller 511 are correspondingly provided on the wall of the first frame plate 501, a lifting bottom plate 513 for supporting and installing the push short roller 507 is provided on the lower side of the first material storage area 510, and a plurality of groups of short roller support plates 512 are correspondingly provided on the lifting bottom plate 513, each group of short roller support plates 512 extends vertically from between adjacent second push rollers 506, and the short roller support plates 512 corresponding to the push short rollers 507 are respectively provided with support shaft holes; a guide lifting mechanism is provided between the bottom of the lifting bottom plate 530 and the bottom frame of the rotary material transfer platform. The guide lifting mechanism of this embodiment includes a lifting cylinder 515 and a guide column 514, wherein the guide column 514 is fixed to the bottom side of the lifting base plate 513, and a guide sleeve is provided on the bottom frame. The lifting cylinder is fixed to the upper side of the bottom frame and can drive the lifting base plate 513 to move up and down, and the guide column 514 guides the movement in the guide sleeve to ensure the vertical lifting movement of the lifting base plate.

[0059] When the pushing short roller 507 installed on the lifting base plate 530 in the first storage area 510 is raised to a height higher than the second pushing roller 506 through the guide lifting mechanism, the rolling motion of the pushing short roller 507 can receive the stacked sheet materials conveyed from the previous process. After all the stacked sheet materials fall into the first storage area 510, the lifting base plate 530 drives the pushing short roller 507 to drop to a height lower than the second pushing roller 506, and the material falls on the surface of the second pushing roller 506. Through the rolling conveyance of the second pushing roller 506 and the third pushing roller 511, the material is conveyed to the second storage area 520 to free up the first storage area 510 to continue waiting for the next round of incoming materials.

[0060] As shown in Figures 6 and 8, in order to facilitate the rotation and reversal of the materials received by the first storage area 510 and the second storage area 520 and continue to push them to the next workstation, the rotary drive mechanism includes a support plate 531 arranged at the bottom of the bottom frame, a support shaft sleeve 537 is fixed at the center of the support plate 531, and a support core shaft 539 is rotatably connected to the center of the support shaft sleeve 537. A flange 532 is provided on the periphery of the support shaft sleeve 537, and a bevel gear ring 538 and a bevel gear meshing with the bevel gear ring are fixed on the lower side of the flange 532. The bevel gear is driven and connected to the reduction motor 535. A shaft seat 539A is provided at the bottom of the support core shaft 539, and the shaft seat 539A is connected to the translation base 530. The shaft seat 539A is connected to the translation base 530, and the reduction motor 535 is fixed on the translation base 530. A group of slider guide mechanisms are respectively provided on both sides of the translation base 530. Each set of slider and guide rail mechanisms includes two sliders 533 arranged at the front and rear of the same side of the translation base 530 and a guide rail 534 cooperating with the two sliders 533. The translation base between the two guide rails 534 is laterally connected to a horizontal cylinder 536 for driving the translation base 536 and the upper mechanisms to move horizontally along the guide rail 534.

[0061] In order to facilitate driving the pushing rollers to roll synchronously to push the material, the second pushing roller 506, the third pushing roller 511 and the short pushing roller 507 are driven to push the material synchronously through the sprocket chain synchronization mechanism.

[0062] As shown in Figures 5 and 6, in order to facilitate the synchronous driving of the second pushing roller 506 and the third pushing roller 511 to roll synchronously, one end of the second pushing roller 506 and the third pushing roller 511 on the same side extends out of the corresponding first frame plate 501, and the end of each roller is connected to the first double sprocket 503, wherein the same side of a group of adjacent first double sprockets 503 is driven and connected to a speed reduction mechanism through a drive chain 505, and the inner and outer sprockets between the remaining adjacent first double sprockets 503 are alternately connected in sequence through the first synchronization chain 504 for synchronous transmission.

[0063] As shown in Figures 5 and 7, in order to facilitate the driving of the push short rollers 507 to roll synchronously, the short roller shaft ends on one side of each push short roller 507 between every two adjacent second push rollers 506 extend outward from the outer side of the corresponding short roller support plate 507, and each short roller shaft end is fixed with a second double sprocket 509, and the inner sprocket and the outer sprocket of each adjacent second double sprocket 509 are alternately connected with a second synchronous chain 508 in sequence; a synchronous shaft 516 is provided on the lower side of the lifting bottom plate 513 in a direction parallel to the axial direction of the push short roller 507, and the length direction of the synchronous shaft 516 spans the bottom side of each row of push short rollers, and a synchronous sprocket 517 is provided on the synchronous shaft 516 at the position corresponding to each row of push short rollers 507, and the outer sprockets of the two adjacent second double sprockets 509 of each row of push short rollers 507 are respectively connected to the synchronous sprocket 517 through a drive chain 518, and the synchronous shaft 516 is driven by a reducer 519.

[0064] As shown in Figures 9 to 12, in order to facilitate the alignment and reception of materials transported by the rotary material transfer platform 5, the mobile feeding trolley 7 includes a vehicle body 720, a combined material platform 710 and a lateral translation mechanism, wherein the lateral translation mechanism includes two lateral guide rails 701 arranged on the lower side of the vehicle body 720 and perpendicular to the sheet conveying direction, and two sets of rollers 702 are correspondingly provided on both sides of the vehicle body 720. The rollers 702 drive the vehicle body 720 to translate along the lateral guide rails 701 through a reducer to adjust the incoming material position aligned with the rotary material transfer platform 7; the combined material platform 710 is arranged on the upper side of the vehicle body 720, and the surface of the combined material platform 710 is provided with a fourth pushing roller 713 for receiving and pushing materials, and the axial direction of the fourth pushing roller 713 is parallel to the lateral guide rail 701; a telescopic feeding mechanism 730 for transferring materials to the mold of the compression molding machine is provided between the combined material platform 710 and the vehicle body 720.

[0065] In order to facilitate the realization of telescopic feeding, the combined material platform 710 includes an upper material platform 712 and a lower material platform 711 that are telescopic. The telescopic feeding mechanism 730 includes two first cylinder grooves 731 arranged parallel to the feeding direction on the surface of the vehicle body 720. The outer sides of the first cylinder grooves 731 are respectively provided with second cylinder grooves in parallel. The first cylinder grooves 731 are provided with an extension arm 721 in the vehicle body discharge direction corresponding to the first cylinder grooves 731. The first cylinder grooves 731 extend to the end 721 of the extension arm. The first cylinder grooves 731 and the second cylinder grooves are respectively installed with a first cylinder 738 and a second cylinder 735. The end of the telescopic rod of the first cylinder 738 is located on the upper material platform. The discharge side edges of 712 and the lower material platform 711 are in a completely overlapping state, the upper material platform 712 and the corresponding side edges of the first cylinder 738 are respectively provided with end connecting ears 737 for connecting the telescopic rod of the first cylinder 738, and the end of the extended rod of the second cylinder 735 is fixedly connected to the corresponding position of the lower material platform 711 via the lower connecting ear 736; two rows of guide rails (732, 733) are respectively provided in parallel on the surface of the vehicle body and the surface of the lower material platform 711, and 2-4 sliders 735 are respectively fixed at intervals on the lower surfaces of the lower material platform 711 and the upper material platform 7121 and the corresponding positions of each guide rail. When the telescopic feeding mechanism 730 drives the combined material platform to extend and retract, the first cylinder and the second cylinder first extend synchronously to drive the upper material platform and the lower material platform of the combined material platform to move horizontally along the guide rail 732 on the vehicle body 720 until the second cylinder extends to the longest working position, and then the second cylinder stops extending, and the first cylinder 738 continues to extend to drive the upper material platform 712 to continue to move forward along the guide rail 733 until the material is pushed to the designated position above the mold cavity.

[0066] As shown in Figure 11, in order to facilitate the driving of the mobile feeding trolley 7 to move along the transverse guide rail 701, two rollers 702 are respectively provided on the front and rear sides of the vehicle body corresponding to each transverse guide rail 701. The two rollers on the front side and the two rollers on the rear side are coaxially connected through wheel axles 704, wherein the wheel axle 704 on the front side (or the rear side) is connected to a reducer drive mechanism, and the reducer drive mechanism includes a first bevel gear 705 fixed on the wheel axle and a second bevel gear 704 meshing with the first bevel gear 705. The second bevel gear 704 is connected to a motor 706, and the motor 706 is fixed to the bottom of the vehicle body.

[0067] In addition, the first push roller 315 on the weighing platform 314 and the fourth push roller 713 on the upper material platform of the mobile feeding trolley 7 are also provided with a synchronous sprocket drive mechanism for synchronously pushing the materials stacked on their upper side and transporting them to the next workstation.

[0068] The SMC sheet material conveying link provided on the SMC sheet material molding automatic production line of this embodiment is provided with a tearing and clamping mechanism in sequence for unfolding, tearing, clamping and flattening the coil material, and then cutting the coil material to a fixed length through the feeding and shearing mechanism 3, and weighing the stacked sheets on the weighing platform. After reaching the predetermined SMC sheet material raw material dosage for molding, the stacked sheets are conveyed through the first lifting platform 4, the rotating material transfer platform 5, the second lifting platform 6 and the mobile feeding trolley 7 into the mold cavity of the molding machine 8 for compression molding, and then the molded product is conveyed to the conveying platform 10 and the transition platform 11 through the grabbing mechanism 9 to complete an automated molding process. Each process link is carried out automatically in sequence with little human intervention, and the automated loading, feeding, cutting, flipping, feeding into the mold area and product discharging are carried out in an orderly manner, thereby improving the on-site working environment, reducing the intensity of manual operation, and improving work efficiency. It has high economic benefits, is easy to realize intelligent management, and has good market prospects. Example 2

[0069] This embodiment, based on Example 1, provides an automated material conveying method for an SMC sheet molding automated production line based on Example 1. Before starting, the initial state of each process of the SMC sheet molding automated production line is debugged, and relevant control parameters are preset, such as material conveying speed parameters, the maximum weight of each stack of materials after shearing, the weight of the materials after weighting, and the total amount of raw materials used in each molding process. The following conveying process is then carried out in sequence:

[0070] Step 1: Loading and clamping: The SMC sheet is manually fed between the upper and lower clamping rollers 102 of the film tearing clamping mechanism, and the end of the SMC sheet is pulled out from between the two clamping rollers 102. The films on the upper and lower surfaces of the SMC sheet are torn apart along the edge of the end, separated from the sheet surface, and wound onto the film reel 101 at the oblique rear. At the same time, the end of the SMC sheet is pulled between the two pinch rollers 2, and the distance between the pinch rollers 2 is adjusted to clamp the SMC sheet.

[0071] Step 2, film tearing and feeding process: start the synchronous drive mechanisms of the film reel 101, the clamping roller 102 and the pressure roller 2 to tear the film while conveying the torn SMC sheet forward at a speed v; the SMC sheet is conveyed to the starting end of the feeding gantry 301;

[0072] Step 3, fixed-length cutting and stacking process: When the SMC sheet is conveyed to the starting end of the feeding truss 301, the clamp moves to the edge of the SMC sheet, clamps the sheet, and then the clamp pulls the sheet forward at a speed v to a predetermined position. The film tearing and feeding process of step 2 is paused, and the shear blade 309 cuts the SMC sheet to a fixed length, and the cut SMC sheet falls onto the weighing platform 314. After the shearing is completed, the shear blade 309 returns, and the film tearing and feeding process of step 2 is continued. The clamp clamps and pulls the sheet to the predetermined position and shears the sheet, and the sheet is stacked onto the weighing platform 314 until the difference between the weight measured by the weighing platform 314 and the predetermined weight is less than the weight of a single sheet. The film tearing and feeding process is paused again, waiting for the weighing platform to move the material.

[0073] In the fourth step, the feeding robot 12 grabs the SMC scrap materials from the scrap stacking table 13 and puts them on the stacked materials on the weighing platform 314 until the weighing weight deviates from the predetermined weight by less than 500 grams. The driving mechanism of the first pushing roller 315 on the weighing platform is started, and the stacked materials are pushed through the first lifting platform 4 to the rotary material transfer platform 5. At this time, the highest point of the pushing short roller 507 of the rotary material transfer platform 5 rises to a height higher than the lowest point of the second pushing roller. The pushing short roller 507 is started, rotates to receive and drive the stacked materials to move forward until they completely enter the first storage area 510, and the pushing short roller 507 is pushed. The second and third push rollers 507 and 521 stop rotating and descend, and the stacked sheets are pushed from the first storage area 510 to the second storage area 520. In this step, when the stacked sheets completely leave the weighing platform 314, the film tearing and feeding process of step 2 is continued, and the film tearing, fixed-length shearing, stacking of sheets on the weighing platform 314, replenishment of scraps by the feeding robot 12, and delivery of the stacked sheets to the rotary material transfer platform 5 are continued until the first and second storage areas 510 and 520 of the rotary material transfer platform are both stacked. The second and third push rollers stop rotating.

[0074] Step 5: Rotary discharging: The first and second lifting platforms are lowered to a certain height to avoid rotation interference. The rotary drive device of the rotary material transfer platform is started to rotate the rotary material transfer platform 90 degrees. The first and second lifting platforms 4 and 5 are raised to be flush with the rotary material transfer platform 5. The second push roller 507 and the third push roller 521 rotate to push the stacked sheets through the second lifting platform 6 to the mobile feeding trolley 7. The second push roller 506 and the third push roller 521 stop rotating. At the same time, the push roller 507 is raised to wait for the next round of incoming materials.

[0075] Step 6: Move the material into the compression molding machine 8: The lateral translation mechanism of the mobile feeding trolley 7 drives the combined material table 710 to move along the lateral guide rail 701 to align with the incoming material orientation, and the fourth pushing roller 713 starts to receive the stacked sheets conveyed by the rotary material transfer platform 5. When the stacked sheets completely fall into the combined material table 710, the combined material table 710 moves horizontally along the lateral guide rail 701 to align with the feeding orientation of the compression molding machine 8. Driven by the retracting and extending feeding mechanism, the combined material table 710 pushes the material to the designated mold cavity position of the compression molding machine 8. With the help of the grabbing mechanism, the second cylinder and the first cylinder extend and retract in sequence in opposite directions, and the material on the upper material table 712 falls into the mold cavity.

[0076] Step 7: The compression molding machine is started to complete the hydraulic molding process. In this step, to suit different specific compression mold structures, after the combined material table receives the stacked sheets, one or more feed positions are set along the direction of the transverse guide rail 701 to the compression molding machine 8 for batch alignment feeding. This can achieve multiple products in one mold or multiple and multi-directional feeding of products with larger plane dimensions, and compression molding in one step.

[0077] In step 8, the material grabbing mechanism 9 moves to the mold area of ​​the compression molding machine, clamps and lifts the molded SMC parts, grabs and sends them to the conveying platform from the discharge direction of the compression molding machine, and then moves them to the transition platform for temporary storage.

[0078] Through the above-mentioned automated material conveying method of the present invention, it is possible to realize automated and continuous unwinding, film tearing, flattening, fixed-length shearing, quantitative stacking, weighing, and conveying of stacked sheets to a compression molding machine. After compression molding, the product is transported to a transition platform through a material grabbing mechanism for temporary storage and waiting for transfer, thereby realizing the automated unloading and conveying production process of the molded product, greatly improving production efficiency and reducing labor intensity in the production process.

Claims

1. An SMC sheet molding automated production line, comprising a feed conveying system, a molding machine, and a discharge conveying system, wherein the feed conveying system comprises a film tearing clamping mechanism, a feeding shearing mechanism, a first lifting platform, a rotating material transfer platform, a second lifting platform, and a mobile feeding trolley, and the discharge conveying system comprises a gripping mechanism, a conveying platform, and a transition platform for discharging the compression-molded product; characterized in that: The film tearing and clamping mechanism includes a film tearing machine and a pressure roller. The film tearing machine includes two upper and lower clamping rollers for clamping the SMC sheet, and film reels symmetrically arranged up and down behind the clamping rollers. The film reels are driven by synchronous drive mechanisms. The discharging direction of the clamping rollers is sequentially provided with a transition conveying roller and the pressure roller. The pressure rollers are provided in parallel up and down for clamping the sheet. The feeding and shearing mechanism includes a feeding gantry, on which a clamping claw for clamping and pulling the sheet material is provided along the feeding direction, a shearing blade for cutting the sheet material to a fixed length, a weighing platform for temporarily storing and stacking the sheared sheets, and a plurality of first pushing rollers arranged on the weighing platform for pushing the weighed sheet material to the next station; A lifting device is provided on the lower side of the first lifting platform and the second lifting platform for lowering the height of the rotating material transfer platform when the rotating material transfer platform rotates and switches the angle to avoid interference with the corners of the rotating material transfer platform; The rotary material transfer platform comprises a rotary platform, a rotary drive device and a slide rail drive mechanism for driving the platform to move horizontally are provided at the bottom center of the rotary platform, a first material storage area and a second material storage area are provided on the surface of the rotary platform, respectively for receiving and temporarily storing sheet materials conveyed by the previous process; the first material storage area is used to receive incoming materials conveyed by the feeding and shearing mechanism, and the second material storage area is used to temporarily store incoming materials pushed by the first material storage area, a plurality of spaced rows of short pushing rollers for receiving incoming materials from the front are provided on the surface of the first material storage area, a second pushing roller is provided in the space at both ends of each row of short pushing rollers, the second pushing roller is arranged perpendicular to the short pushing roller, a third pushing roller parallel to the second pushing roller is provided on the surface of the second material storage area, and each group of the first pushing roller, the second pushing roller, the third pushing roller and the short pushing roller are provided with a synchronous driving mechanism respectively; The mobile feeding trolley can be translated laterally and can be stretched and retracted along the conveying direction of the production line to feed materials, and is used to receive the sheets pushed by the rotary material transfer table and push the sheets into the compression molding machine.

2. The SMC sheet molding automated production line according to claim 1, characterized in that: The feeding and shearing mechanism is laterally provided with a crushed material stacking platform and a material adding manipulator for adding small pieces of material to the weighing platform for counterweighting.

3. The SMC sheet molding automated production line according to claim 1, characterized in that: The cam is provided with a first end for receiving the first moving part and a second end for receiving the first moving part, and the second end for receiving the first moving part is connected to the cam by the second transmission mechanism, and the cam is connected to the first moving part via a transmission mechanism.

4. The SMC sheet molding automated production line according to claim 3, characterized in that: The shear blade is connected to the feed yoke through a blade holder, and a second crossbeam is provided at one end of the feed yoke close to the film tearing clamping mechanism. The blade holder is connected to the second crossbeam through a transverse guide rail slider mechanism, and the second crossbeam is also connected to a screw nut mechanism for driving the transverse guide rail slider mechanism to move.

5. The SMC sheet molding automated production line according to claim 1, characterized in that: The rotating platform includes a rectangular bottom frame, and the four sides of the bottom frame are respectively provided with a first frame plate and a second frame plate, the length direction of the first frame plate is perpendicular to the axial direction of the second pushing roller and the third pushing roller, and the first frame plate wall is correspondingly provided with a plurality of first support holes for rotatably supporting the second pushing roller and the third pushing roller, and the lower side of the first material storage area is provided with a lifting bottom plate for supporting and installing the pushing short roller, and the lifting bottom plate is correspondingly provided with a plurality of groups of short roller support plates, each group of short roller support plates extends vertically from between adjacent second pushing rollers, and the short roller support plates corresponding to the pushing short rollers are respectively provided with support shaft holes; a guide lifting mechanism is provided between the bottom of the lifting bottom plate and the bottom frame of the rotary material transfer platform; The rotary drive mechanism includes a support plate arranged at the bottom of the bottom frame, a support shaft sleeve is fixed at the center of the support plate, and a support core shaft is rotatably connected to the center of the support shaft sleeve, a flange is provided on the outer periphery of the support shaft sleeve, a bevel gear ring and a bevel gear meshing with the bevel gear ring are fixed on the lower side of the flange, and the bevel gear is driven and connected to the reduction motor, and a shaft seat is provided at the bottom of the support core shaft, and the shaft seat is connected to the translation base, and the reduction motor is fixed on the translation base, and a group of slider guide rail mechanisms are respectively provided on both sides of the translation base, and each group of slider guide rail mechanisms includes two sliders arranged at the front and rear of the same side of the translation base and guide rails cooperating with the two sliders, and a horizontal cylinder is connected to the side of the translation base between the two guide rails, which is used to drive the translation base and the upper mechanisms to move horizontally along the guide rails.

6. The SMC sheet molding automated production line according to claim 5 is characterized in that: The second pushing roller, the third pushing roller and the short pushing roller are driven to push materials synchronously through a sprocket chain synchronization mechanism.

7. The SMC sheet molding automated production line according to claim 5 is characterized in that: One end of the second pushing roller and the third pushing roller on the same side extends outward from the corresponding first frame plate, and the end of each roller is connected to a first double sprocket, wherein the same side of a group of adjacent first double sprockets is driven and connected to a reduction mechanism through a drive chain, and the inner and outer sprockets between the remaining adjacent first double sprockets are alternately connected in sequence and synchronously through the first synchronization chain; The short roller shaft end on one side of each row of pushing short rollers extends outward from the corresponding short roller support plate, and a second double sprocket is fixed to each short roller shaft end, and the inner sprocket and the outer sprocket of each adjacent second double sprocket are alternately connected with a second synchronous chain; a synchronous shaft is provided on the lower side of the lifting base plate in a direction parallel to the axial direction of the pushing short roller, and the length direction of the synchronous shaft spans the bottom side of each row of pushing short rollers, and synchronous sprockets are provided on the synchronous shaft at positions corresponding to each row of pushing short rollers, and the two adjacent second double sprocket outer sprockets of each row of pushing short rollers facing the synchronous shaft are connected to the synchronous sprocket through a driving chain, and the synchronous shaft is connected to a reducer drive.

8. The SMC sheet molding automated production line according to claim 1 is characterized in that: The mobile feeding trolley includes a vehicle body, a combined material platform and a transverse translation mechanism. The transverse translation mechanism includes two transverse guide rails arranged on the lower side of the vehicle body and perpendicular to the sheet conveying direction. Two sets of rollers are correspondingly provided on both sides of the vehicle body. The rollers drive the vehicle body to translate along the transverse guide rails through a reducer to adjust the incoming material position aligned with the rotating material transfer platform; the combined material platform is arranged on the upper side of the vehicle body, and the surface of the combined material platform is provided with a fourth pushing roller for receiving and pushing materials, and the axial direction of the fourth pushing roller is parallel to the transverse guide rail; the telescopic feeding mechanism for transferring materials to the mold of the compression molding machine is provided between the combined material platform and the vehicle body.

9. The SMC sheet molding automated production line according to claim 7 is characterized in that: The combined material platform includes an upper material platform and a lower material platform that are retractable in the upper and lower layers, and the telescopic feeding mechanism includes two first cylinder grooves arranged parallel to the feeding direction on the surface of the vehicle body, and a second cylinder groove is provided in parallel on the outer side of the first cylinder groove, and an extension arm is provided in the vehicle body discharging direction corresponding to the first cylinder groove, and the first cylinder groove extends to the end of the extension arm, and the first cylinder and the second cylinder are respectively installed in the first cylinder groove and the second cylinder groove. The first cylinder is fixed to the lower side of the lower material platform, and the second cylinder is fixed on the vehicle body, and the end of the telescopic rod of the first cylinder is located at the discharging side edge when the upper and lower material platforms are completely overlapped, and the positions of the corresponding side edges of the upper and lower material platforms and the first cylinder are respectively provided with end connecting ears for connecting the telescopic rod of the first cylinder, and the end of the extension rod of the second cylinder is fixedly connected to the corresponding position of the lower material platform via the lower connecting ear; two rows of guide rails are respectively provided in parallel on the surface of the vehicle body and the surface of the lower material platform, and 2-4 sliders are respectively fixed at intervals on the lower surfaces of the lower and upper material platforms and the positions corresponding to each guide rail.

10. The SMC sheet molding automated production line according to claim 1 is characterized in that: Two rollers are respectively provided on the front and rear sides of the vehicle body corresponding to each transverse guide rail, and the two rollers on the front side and the two rollers on the rear side are coaxially connected through wheel axles, wherein the front (or rear) wheel axle is connected to the reducer drive mechanism, and the reducer drive mechanism includes a first bevel gear fixed on the wheel axle and a second bevel gear meshing with the first bevel gear, the second bevel gear is connected to the motor, and the motor is fixed to the bottom of the vehicle body.

11. An automated material conveying method using the SMC sheet molding automated production line according to any one of claims 1 to 10, characterized in that: Before starting, debug the initial status of each part of the SMC sheet molding automation production line, preset relevant control parameters, and then carry out the following conveying process in sequence: Step 1, Loading and Clamping: The SMC sheet is manually fed between the upper and lower rollers of the film tearing clamping mechanism, and the end of the SMC sheet is pulled out from between the two rollers. The films on the upper and lower surfaces of the SMC sheet are torn apart along the edge of the end, separated from the sheet surface, and wound onto the film reels at the rear. At the same time, the end of the SMC sheet is pulled between the two pinch rollers, and the distance between the pinch rollers is adjusted to clamp the SMC sheet. Step 2, film tearing and feeding process: start the synchronous drive mechanism of the film reel, the clamping roller and the pressure roller to tear the film while conveying the torn SMC sheet forward at a speed v; the SMC sheet is conveyed to the starting end of the feeding gantry; Step 3, fixed-length cutting and stacking process: When the SMC sheet is conveyed to the starting end of the feeding gantry, the clamp moves to the edge of the SMC sheet, clamps the sheet, and then the clamp pulls the sheet forward at a speed v to the predetermined position. The tearing and feeding process of step 2 is paused, and the shear blade cuts the SMC sheet to a fixed length, and the cut SMC sheet falls onto the weighing platform. After the shearing is completed, the shear blade returns, and the tearing and feeding process of step 2 continues to start and repeat the aforementioned clamping and pulling of the sheet to the predetermined position, shearing the sheet, and stacking the sheet onto the weighing platform until the difference between the weight measured on the weighing platform and the predetermined weight is less than the weight of a single sheet. The tearing and feeding process is paused again, waiting for the weighing platform to move the material. In the fourth step, the feeding robot grabs the SMC scrap materials from the scrap stacking table and puts them on the stacked materials on the weighing platform until the weighing weight deviates from the predetermined weight by less than 500. The first pushing roller on the weighing platform starts to push the stacked materials through the first lifting platform to the rotary material transfer platform. At this time, the pushing short roller of the rotary material transfer platform rises and starts to rotate to receive and drive the pushed and stacked materials forward until the stacked materials completely enter the first storage area. The pushing short roller stops rotating and descends, and the second pushing roller and the third pushing roller are started at the same time, and the stacked materials are pushed from the first storage area to the second storage area; in this step, when the stacked materials completely leave the weighing platform, the film tearing and feeding process in step 2 continues to start, and the film tearing, fixed-length shearing, stacking of materials to the weighing platform, the robot replenishes scraps, and the stacked materials are transported to the rotary material transfer platform until the materials are stacked in the first and second storage areas of the rotary material transfer platform; the second pushing roller and the third pushing roller pause rotation; Step 5, Rotary Discharging: The first and second lifting platforms are lowered to a certain height to avoid rotation interference. The rotary drive device of the rotary transfer platform is started to rotate the rotary transfer platform 90 degrees. The first and second lifting platforms are raised to be flush with the rotary transfer platform. The second and third push rollers rotate to push the stacked sheets through the second lifting platform to the mobile feeding trolley. The second and third push rollers stop rotating. At the same time, the push roller is raised to wait for the next round of incoming materials. Step 6: Move the material into the compression molding machine: The lateral translation mechanism of the mobile feeding trolley drives the combined material table to move along the lateral guide rail to align with the incoming material direction. The fourth push roller starts to receive the stacked sheets conveyed by the rotating material transfer table. When the stacked sheets completely fall into the combined material table, the combined material table moves horizontally along the lateral guide rail to align with the feeding direction of the compression molding machine. The combined material table moves horizontally to push the material to the specified position of the compression molding machine. Step 7: The compression molding machine starts to complete the hydroforming process; In step 8, the material grabbing mechanism moves to the mold area of ​​the compression molding machine, clamps and lifts the molded SMC parts, grabs and sends them to the conveying platform from the discharge direction of the compression molding machine, and then moves them to the transition platform for temporary storage.

12. The automatic material conveying method according to claim 11, characterized in that: In step 6, after the combined material table receives the stacked sheets, one or more guide rails are set along the direction of the transverse guide rail to feed the materials to the compression molding machine in batches.

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