Double-press 22-station large slice automatic forming machine

Abstract

The utility model relates to a double-press 22-station large slice automatic forming machine which comprises a machine frame with a slide way and mold turning plates with molds, the slide way is bent to be arranged on the machine frame in a shape like a Chinese character'hui ', a plurality of mold turning plates are sequentially arranged in the slide way, the mold turning plates circularly slide on the machine frame along the slide way, and the molds are arranged on the mold turning plates. Intermittent motion propelling devices used for pushing the mold turning plate to slide are further arranged at the four corners of the machine frame. Two sets of production stations are diagonally arranged on the rack, the mold turning plate carries the mold to circulate between the two sets of production stations, and each set of production station comprises a bottom pressing station, a primary feeding and spreading station, a net placing station, a net pressing station, a secondary feeding and spreading station, a fine spreading station, an idle station, a trademark core ring station, a pressing station, a waxing station and a mold unloading station. The main machine and the auxiliary machine are arranged on the same rack in an end-to-end connection mode and share the same group of sliding ways arranged in a square frame and the same intermittent motion propelling device, so that one device is equal to two devices, and the yield can be doubled.

Description

Technical Field

[0001] The utility model relates to the technical field of abrasive tool and abrasive production equipment, in particular to a double-press 22-station large slice automatic forming machine. Background Art

[0002] At present, the mainstream equipment for large (300-405MM diameter) cutting wheel forming is the rotary multi-station forming machine. Due to the limitations of steel size, processing capacity, purchased parts and other conditions, it is difficult to achieve a double set of main and auxiliary machine layout or a multi-cavity layout for each station. A set of main and auxiliary machines is a hydraulic press and a number of matching auxiliary production devices.

[0003] For example, our unit previously applied for a grinding wheel rotary multi-station molding machine, whose patent publication number is CN102699835B. The molding machine adopts multi-station operation, and multiple operating stations are arranged in sequence around the working turntable. One station corresponds to one mold, and the molding of the grinding wheel is realized during the rotation stroke of one mold. With the continuous operation of the working turntable, the grinding wheel can be manufactured uninterruptedly.

[0004] If you want to improve production efficiency, you have to arrange two sets of equipment, which will inevitably increase the investment cost and require a larger floor space. Or you can arrange two molds at each station of the equipment, so that one rotary stroke can produce two grinding wheels. Arranging two molds may cause problems such as unstable mold operation and high failure rate, and the installation layout of the matching devices is complicated. Summary of the invention

[0005] In order to solve the problem that it is difficult for a rotary multi-station forming machine to realize a double-set main and auxiliary machine arrangement or a multi-cavity arrangement for each station, resulting in low production efficiency, the utility model provides a double-press 22-station large slice automatic forming machine, in which two sets of main and auxiliary machines are arranged end to end on the same frame, and share the same set of square-frame-arranged mold slideways and the same set of intermittent motion propulsion devices. In this way, one device is equivalent to two devices, not only do the output doubles, but the price and floor space occupied are much lower than those of two devices.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A double-press 22-station large slice automatic forming machine comprises a frame with a slideway and a mold car plate with a mold, wherein the slideway is bent in a "U" shape and arranged on the frame, and a plurality of mold car plates are arranged in sequence from head to tail in the slideway, and the mold car plates are arranged on the frame along the slideway for circular sliding, and intermittent motion propulsion devices for pushing the mold car plates to slide are also arranged at the four corners of the frame;

[0008] The frame is in a square frame shape, and two sets of production stations are arranged diagonally on the frame. The mold car plate carries the mold and circulates back and forth between the two sets of production stations. Each set of production stations includes a bottom pressing station, a primary feeding and spreading station, a net placing station, a net pressing station, a secondary feeding and spreading station, a fine spreading station, an empty station, a trademark core ring station, a pressing station, a wax coating station, and a mold unloading station.

[0009] The bottom pressing station includes a bottom pressing plate device, the primary feeding and spreading station includes a feeding device, a scraping device and a mold rotating device, the net placing station includes a mesh feeding device and a net baking device, the net pressing station includes a net pressing device, the secondary feeding and spreading station has the same structure as the primary feeding and spreading station, the fine spreading station includes a scraping device and a mold rotating device, the trademark core ring station includes a trademark core ring picking-up machine, the pressing station includes a hydraulic press with an upper pressure head, the wax coating station includes an upper pressure head wax coating device, and the demolding station includes a mold ejection device, a grinding wheel picking-up device and a flat belt conveyor.

[0010] Furthermore, the bottom pressing station, the primary feeding and spreading station, the net placing station, the net pressing station, the secondary feeding and spreading station, the fine spreading station, the empty station, the trademark core ring station, the pressing station, the wax coating station and the mold unloading station in one set of production stations are arranged in sequence along the sliding direction of the mold car plate;

[0011] The bottom pressing station, primary feeding and spreading station, net placing station, net pressing station, secondary feeding and spreading station, fine spreading station, trademark core ring station, pressing station, wax coating station, mold unloading station and empty station in another set of production stations are arranged in sequence along the sliding direction of the mold car plate. The layout order of the two sets of production stations is slightly different.

[0012] Furthermore, spaces for accommodating mold plates are respectively preset at diagonal positions of the slideway, so that the slideway is not filled with mold plates, which facilitates the movement of the mold plates. The mold is set by rotating the center of the mold plate, and the mold includes a mold ring, a circular mold bottom set in the mold ring, and a core rod coaxially set on the mold bottom;

[0013] There are four intermittent motion propulsion devices, which are arranged in groups of two, horizontally at one corner of the frame and vertically at another corner of the frame. The intermittent motion propulsion devices include a propulsion linear module installed under the frame and a slide with a pusher head controlled by the propulsion linear module, and the pusher head pushes the mold vehicle plate to move along the slideway.

[0014] Furthermore, the bottom pressing plate device includes a bottom pressing mounting frame, a bottom pressing plate protective cover, a bottom pressing cylinder, a bottom plate reset plate and an adjusting screw. The bottom pressing mounting frame is arranged above the frame, the bottom pressing plate protective cover is arranged on the surrounding side of the bottom pressing mounting frame, the bottom pressing cylinder is vertically arranged on the bottom pressing mounting frame, the bottom pressing cylinder piston rod is downwardly connected to the circular bottom plate reset plate, and a plurality of adjusting screws are circumferentially arranged on the bottom plate reset plate.

[0015] Furthermore, the feeding device is arranged outside the frame, and includes a raw material vibration plate and a weighing feeding mechanism arranged at intervals, and the weighing feeding mechanism includes a conveyor belt, a belt hopper arranged above the conveyor belt, a chute obliquely arranged below the conveyor belt, a weighing sensor, a flip hopper and a material guide trough flipably arranged above the weighing sensor, the raw material vibration plate, the conveyor belt, the flip hopper and the material guide trough are connected in sequence, and the outlet of the material guide trough is inclined toward the mold, so as to facilitate the raw material to be guided into the mold;

[0016] The scraper device is arranged inside the frame, and includes a scraper bottom plate, a scraper electric cylinder vertically arranged on the scraper bottom plate, a scraper connecting block and a scraper. The output shaft of the scraper electric cylinder is downwardly connected to the scraper through the scraper connecting block. The scraper extends into the mold to scrape the raw material flat.

[0017] The mold rotating device is arranged under the frame, and the mold rotating device includes a reduction motor, a turntable bearing seat and a turntable panel. The output shaft of the reduction motor passes through the turntable bearing seat upward to connect the turntable panel. The turntable panel and the mold are matched in size to ensure the uniformity of the raw materials in the mold when feeding.

[0018] Furthermore, the mesh delivery device includes a mesh storage mechanism arranged on the outside of the frame and a mesh clamping mechanism arranged on the inside of the frame;

[0019] The mesh storage mechanism includes a mesh stack formed by stacking a plurality of glass fiber meshes, a mesh stack lifting unit for driving the mesh stack to lift, and a mesh picking unit for continuously picking up a single mesh, wherein the mesh picking unit, the mesh stack and the mesh stack lifting unit are arranged in sequence up and down;

[0020] The mesh clamping mechanism includes a mesh linear module and a clamping claw cylinder controlled by the mesh linear module. The mesh linear module spans over the slideway. The mesh linear module drives the clamping claw cylinder to reciprocate inside and outside the frame. The clamping claw cylinder clamps a mesh and puts it into the mold.

[0021] The grilling net device comprises a grilling net bottom plate, a grilling net cylinder arranged on the grilling net bottom plate and a grilling net cover controlled by the grilling net cylinder. The grilling net cover is a round cover with heating wires arranged on the inner wall thereof. The grilling net cover is adapted to the size of the mold to promote the softening of the net sheet and the combination with the raw material.

[0022] Furthermore, the mesh pressing device includes a mesh pressing bottom plate, a mesh pressing cylinder and a mesh pressing plate. A mesh pressing shield is arranged around the mesh pressing bottom plate. The mesh pressing cylinder is vertically arranged on the mesh pressing bottom plate. The piston rod of the mesh pressing cylinder is downwardly connected to the circular mesh pressing plate.

[0023] Furthermore, the trademark core ring picking machine includes a trademark core ring storage device arranged on the outside of the frame and a trademark core ring picking mechanism arranged on the inside of the frame;

[0024] The trademark core ring storage device includes a core ring vibration plate for storing core rings, a core ring belt conveyor, a core ring connecting plate, a trademark stack formed by stacking a plurality of trademark papers, and a trademark lifting unit for driving the trademark stack to rise and fall. The core ring vibration plate outlet, the core ring belt conveyor and the core ring connecting plate are connected in sequence, and the trademark lifting unit is arranged below the trademark stack.

[0025] The trademark core ring picking mechanism includes a trademark core ring linear module, a core ring picking unit controlled by the trademark core ring linear module, and a trademark picking unit. The trademark core ring linear module spans over the slideway, and the trademark core ring linear module simultaneously drives the core ring picking unit and the trademark picking unit to reciprocate inside and outside the frame.

[0026] Furthermore, the upper pressure head wax coating device is arranged above the frame, and the upper pressure head wax coating device includes a wax coating frame swingably arranged on the frame, a swing cylinder, an inner cylinder, a wax coating connecting rod frame, a wax coating motor and a wax coating disk;

[0027] The swing cylinder piston rod is connected to the wax coating frame to drive the wax coating frame to swing, the inner cylinder is vertically arranged in the wax coating frame, the wax coating connecting rod frame is lifted and lowered, the inner cylinder piston rod is upwardly connected to the wax coating connecting rod frame, which is convenient for driving the wax coating connecting rod frame to rise and fall, the wax coating motor is arranged at one end of the wax coating connecting rod frame, the wax coating motor and the inner cylinder correspond to each other up and down, the wax coating disk is rotatably arranged at the other end of the wax coating connecting rod frame, the wax coating disk and the wax coating motor are driven, so that the wax coating disk rotates to evenly coat the upper pressure head with wax.

[0028] Furthermore, the grinding wheel picking device and the mold ejecting device are respectively arranged above and below the frame, and a mold is arranged between the grinding wheel picking device and the mold ejecting device;

[0029] The mold ejection device comprises a mold unloading cylinder, a mold unloading plate and a mold unloading rod. The piston rod of the mold unloading cylinder is upwardly connected to the mold unloading plate. A plurality of mold unloading rods are circumferentially arranged on the mold unloading plate. The mold unloading rods are tightly against the bottom of the mold.

[0030] The grinding wheel picking device comprises a picking frame horizontally arranged above the frame, a picking linear module arranged on the picking frame, and a grinding wheel picking mechanism slidably connected to the picking frame and controlled by the picking linear module. The grinding wheel picking mechanism picks up the grinding wheel and transfers it to the flat belt conveyor.

[0031] Through the above technical solution, the beneficial effects of the utility model are:

[0032] The utility model has a reasonable structural design. It is based on the same frame, and the frame is equipped with a slide and an intermittent motion propulsion device, so that multiple molds can be circulated on the frame. Two sets of production stations are fixedly arranged at the diagonal points of the frame, which is equivalent to arranging two sets of main and auxiliary machines end to end on the same frame, sharing the same set of mold slides and the same set of intermittent motion propulsion devices arranged in a square frame. Each set of production stations includes eleven sub-stations, and a grinding wheel can be produced by the mold flowing through a set of production stations. Since the mold circulates on the frame, it circulates through two sets of production stations, and then two grinding wheels can be produced in one cycle. In this way, one device is equivalent to two. The various devices in the equipment are reasonably arranged to ensure the organic combination of the two sets of functional components. The unit has a compact structure and sufficient adjustment and maintenance space. At the same time, it effectively improves production efficiency and doubles the output, while the price and floor space are much lower than two devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the mold layout of the utility model double press 22-station large slice automatic forming machine.

[0034] Figure 2 It is a schematic diagram of the intermittent motion propulsion device of the utility model double press 22-station large slice automatic forming machine.

[0035] Figure 3 It is a schematic diagram of the layout of two sets of production stations of the double-press 22-station large slice automatic forming machine of the utility model. The dotted lines in the figure represent the arrangement of each sub-station of a set of production stations.

[0036] Figure 4 It is an axonometric diagram of the overall structure of a double-press 22-station large-slice automatic forming machine of the utility model.

[0037] Figure 5 It is a top view of the overall structure of the utility model double press 22-station large slice automatic forming machine.

[0038] Figure 6 The utility model is a schematic diagram of a bottom pressing device in a bottom pressing station of a double press 22-station large slice automatic forming machine.

[0039] Figure 7 The utility model is a schematic diagram of a feeding device in a one-time feeding and spreading station of a double-press 22-station large slice automatic forming machine.

[0040] Figure 8The utility model is a schematic diagram of the arrangement of a scraping device and a mold rotating device in a one-time feeding and spreading station of a double-press 22-station large-slice automatic forming machine.

[0041] Fig. 9 The utility model is a schematic diagram of a scraping device in a one-time feeding and spreading station of a double-press 22-station large slice automatic forming machine.

[0042] Fig.10 The utility model is a schematic diagram of a mesh feeding device and a mesh baking device in a mesh placing station of a double press 22-station large slice automatic forming machine.

[0043] Fig.11 It is a schematic diagram of a mesh pressing device in a mesh pressing station of a double-press 22-station large slice automatic forming machine of the utility model.

[0044] Fig.12 It is a schematic diagram of the layout of the secondary feeding and spreading stations of the utility model double-press 22-station large slice automatic forming machine.

[0045] Fig.13 It is a schematic diagram of a trademark core ring integrated machine in the trademark core ring station of a double-press 22-station large slice automatic forming machine of the utility model.

[0046] Fig.14 It is a schematic diagram of a hydraulic press in a pressing station of a double-press 22-station large slice automatic forming machine of the utility model.

[0047] Fig.15 The utility model is a schematic diagram of an upper pressure head wax coating device in a wax coating station of a double-press 22-station large slice automatic forming machine.

[0048] Fig.16 It is a schematic diagram of a mold ejection device, a grinding wheel picking device and a flat belt conveyor in a mold unloading station of a double-press 22-station large-slice automatic forming machine of the utility model.

[0049] The numbers in the attached drawings are: 1 slide, 2 frame, 3 mold, 4 mold car plate, 5 intermittent motion propulsion device, 51 propulsion linear module, 52 slide, 53 push head, 6 bottom pressing station, 7 primary feeding and spreading station, 8 net release station, 9 net pressing station, 10 secondary feeding and spreading station, 11 fine spreading station, 12 empty station, 13 trademark core ring station, 14 pressing station, 15 wax coating station, 16 demoulding station, 17 bottom pressing plate device, 171 bottom pressing mounting frame, 172 bottom pressing plate shield, 173 bottom pressing Cylinder, 174 bottom plate reset plate, 175 adjustment screw, 18 feeding device, 181 raw material vibration plate, 182 conveyor belt, 183 belt hopper, 184 chute, 185 weighing sensor, 186 flip hopper, 187 guide trough, 19 scraper device, 191 scraper bottom plate, 192 scraper electric cylinder, 193 scraper connecting block, 194 scraper, 20 mold rotating device, 201 reduction motor, 202 turntable bearing seat, 203 turntable panel, 21 mesh feeding device, 211 Mesh stack, 212 mesh stack lifting unit, 213 mesh picking unit, 214 mesh linear module, 215 clamping claw cylinder, 22 grilling device, 221 grilling bottom plate, 222 grilling cylinder, 223 grilling cover, 23 mesh pressing device, 231 mesh pressing bottom plate, 232 mesh pressing cylinder, 233 mesh pressing plate, 24 trademark core ring picking machine, 241 core ring vibration plate, 242 core ring belt conveyor, 243 core ring plate, 244 trademark stack, 245 trademark lifting unit, 246 trademark core ring straight Linear module, 247 core ring picking unit, 248 trademark picking unit, 25 upper pressure head, 26 hydraulic press, 27 upper pressure head wax coating device, 271 wax coating rack, 272 swing cylinder, 273 inner cylinder, 274 wax coating connecting rod rack, 275 wax coating motor, 276 wax coating disk, 28 mold ejection device, 281 mold unloading cylinder, 282 mold unloading disk, 283 mold unloading rod, 29 grinding wheel picking device, 291 picking rack, 292 picking linear module, 293 grinding wheel picking mechanism, 30 flat belt conveyor. DETAILED DESCRIPTION

[0050] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings:

[0051] like Figure 1 to Figure 16 As shown, a double press 22-station large slice automatic forming machine includes a frame 2 with a slide 1 and a mold plate 4 with a mold 3. The frame 2 is a square frame, and a slide 1 is installed above the frame 2. The slide 1 is bent in a "U" shape and is arranged on the frame 2. The slide 1 is used to limit the mold plate 4. Figure 1 shown.

[0052] A plurality of mold plates 4 are arranged in sequence from head to tail in the slideway 1, and the slideway 1 can be covered with 22 mold plates 4, but the number of mold plates 4 here is 20. There are two empty spaces for accommodating mold plates 4 at the diagonal positions of the slideway 1, and one empty space can only accommodate one mold plate 4.

[0053] The mold plate 4 is set on the frame 2 along the slide 1 for circular sliding. The purpose of not filling the slide 1 with the mold plate 4 is to reserve transfer space for the mold plate 4 so that the mold plate 4 can move and turn in the slide 1. The frame 2 supports the mold plate 4 when moving.

[0054] Intermittent motion propulsion devices 5 for pushing the mold plate 4 to slide are also provided at the four corners of the frame 2. There are four intermittent motion propulsion devices 5, and the running directions of the four intermittent motion propulsion devices 5 are respectively toward the four sides of the frame 2, which can promote the transfer of the mold plate 4 at the corners of the frame 2. The four intermittent motion propulsion devices 5 are arranged in pairs, horizontally at one corner of the frame 2 and vertically at the other corner of the frame 2.

[0055] The authorization announcement number CN210682195U applied for by the same applicant is a linear intermittent displacement mechanism for a mold 3, in which the functions and layout of the slide 1 and the mold plate 4 are disclosed, and the functions of the intermittent motion propulsion device 5 are also disclosed, which will not be repeated here.

[0056] Different from this, the intermittent motion propulsion device 5 here adopts a servo propulsion method, which has a higher pushing accuracy. The intermittent motion propulsion device 5 includes a propulsion linear module 51 installed under the frame 2 and a slide 52 with a push head 53 controlled by the propulsion linear module 51. The propulsion linear module 51 drives the push head 53 to move, thereby pushing the mold vehicle plate 4 to move along the slideway 1. Figure 2 shown.

[0057] During the sliding of the mold plate 4, the mold 3 can be driven to move at the same time. The mold plate 4 rotates at the center to set the mold 3, which is equivalent to the mold plate 4 being sleeved outside the mold 3. The mold plate 4 and the mold 3 are both supported by the frame 2. The mold 3 includes a mold ring, a circular mold bottom set in the mold ring, and a core rod coaxially set on the mold bottom. The mold ring can rotate in the mold plate 4, and the mold plate 4 also locks the mold ring to prevent its axial movement. The mold bottom can move up and down in the mold ring under the action of external force, and the core rod moves with it. The authorization announcement number CN210678391U applied by the same applicant, a molding grinding wheel automatic unloading mechanism, has disclosed the structure of the mold 3, which will not be repeated here.

[0058] Two sets of production stations are arranged diagonally on the frame 2, and the mold car plate 4 carries the mold 3 to cycle back and forth between the two sets of production stations to achieve uninterrupted production of the grinding wheel. Each set of production stations includes a bottom pressing station 6, a primary feeding and spreading station 7, a net placing station 8, a net pressing station 9, a secondary feeding and spreading station 10, a fine spreading station 11, an empty station 12, a trademark core ring station 13, a pressing station 14, a wax coating station 15, and a mold unloading station 16.

[0059] In this embodiment, the arrangement order of each sub-station in the two sets of production stations is different. Here, the bottom pressing station 6, the primary feeding and spreading station 7, the net placing station 8, the net pressing station 9, the secondary feeding and spreading station 10, the fine spreading station 11, the empty station 12, the trademark core ring station 13, the pressing station 14, the wax coating station 15 and the demolding station 16 in one set of production stations are arranged in sequence along the sliding direction of the mold car plate 4. The bottom pressing station 6, the primary feeding and spreading station 7, the net placing station 8, the net pressing station 9, the secondary feeding and spreading station 10, the fine spreading station 11, the trademark core ring station 13, the pressing station 14, the wax coating station 15 and the demolding station 16 and the empty station 12 in the other set of production stations are arranged in sequence along the sliding direction of the mold car plate 4, as shown in FIG. Figure 3~Figure 5 shown.

[0060] Taking the above-mentioned set of production stations as an example, the structure of each sub-station is described in detail: 1. The bottom pressing station 6 is the starting point of the production station. The bottom pressing station 6 is used to reset the mold bottom that was originally lifted up so as to put the raw material into the mold 3 again. The bottom pressing station 6 includes a bottom pressing plate device 17, and the bottom pressing plate device 17 includes a bottom pressing mounting frame 171, a bottom pressing plate shield 172, a bottom pressing cylinder 173, a bottom plate reset plate 174 and an adjustment screw 175, as shown in FIG. Figure 6 shown.

[0061] The bottom pressing mounting frame 171 is arranged above the frame 2, and a bottom pressing plate shield 172 is arranged around the bottom pressing mounting frame 171. A bottom pressing cylinder 173 is arranged vertically on the bottom pressing mounting frame 171, and the bottom pressing cylinder 173 is inverted, and the piston rod of the bottom pressing cylinder 173 is downwardly connected to a circular bottom plate reset plate 174, thereby driving the bottom plate reset plate 174 to rise and fall, and three adjusting screws 175 are arranged circumferentially on the bottom plate reset plate 174, and the adjusting screws 175 and the bottom plate reset plate 174 rise and fall together.

[0062] When the mold 3 moves to the bottom pressing station 6, the bottom pressing plate device 17 starts to operate: the bottom pressing cylinder 173 extends, driving the bottom plate reset plate 174 and the adjusting screws 175 to descend together, and the three adjusting screws 175 evenly contact the mold bottom, causing the mold bottom to move down and reset, providing space for the raw materials.

[0063] 2. The one-time feeding and spreading station 7 is used for quantitative feeding and roughing of raw materials after the mold bottom is reset. The one-time feeding and spreading station 7 includes a feeding device 18, a scraping device 19 and a mold rotating device 20. The feeding device 18 feeds materials, the scraping device 19 scrapes materials and the mold rotating device 20 drives the mold 3 to rotate. The three cooperate with each other to achieve quantitative feeding and rough scraping of raw materials.

[0064] The feeding device 18 is used to quantitatively feed the raw materials for making the grinding wheel into the mold 3. The feeding device 18 is arranged outside the frame 2. The feeding device 18 includes a raw material vibration plate 181 and a weighing and feeding mechanism arranged at intervals. The weighing and feeding mechanism includes a conveyor belt 182, a belt hopper 183 arranged above the conveyor belt 182, a chute 184 inclined below the conveyor belt 182, a weighing sensor 185, a tipping hopper 186 and a material guide trough 187 that can be flipped and arranged above the weighing sensor 185. The raw material vibration plate 181, the conveyor belt 182, the tipping hopper 186 and the material guide trough 187 are connected in sequence, and the outlet of the material guide trough 187 is inclined toward the mold 3, as shown in FIG. Figure 7 shown.

[0065] The operating principle of the feeding device 18 is as follows: the raw material vibration plate 181 operates to convey the raw material to the belt hopper 183, which is open at the top and bottom and can gather the raw material onto the conveyor belt 182. The conveyor belt 182 drives the raw material to move into the flip hopper 186, and the weighing sensor 185 detects the weight of the raw material. After reaching the set weight value, the flip hopper 186 is driven by the cylinder to flip, so that the raw material is poured into the guide trough 187, and then flows into the mold 3 through the guide trough 187. The same applicant applied for the authorization announcement number CN212942835U, the resin abrasive fixed weight feeding device 18, which has disclosed the function and principle of the feeding device 18, which will not be repeated here.

[0066] While the feeding device 18 is feeding, the mold rotating device 20 is running to drive the mold 3 to rotate, so as to avoid the raw materials from piling up in one place and to promote the raw materials to be evenly fed into the mold 3. The mold rotating device 20 is arranged below the frame 2, and the mold rotating device 20 comprises a reduction motor 201, a turntable bearing seat 202 and a turntable panel 203. The output shaft of the reduction motor 201 passes through the turntable bearing seat 202 upward to connect the turntable panel 203, thereby driving the turntable panel 203 to rotate. The turntable panel 203 and the mold 3 are of suitable size, and the turntable panel 203 is in contact with the bottom of the mold 3, so as to drive the mold 3 to rotate in the mold plate 4. Figure 8 shown.

[0067] The scraper device 19 extends into the mold 3 to scrape the material while the material is being fed and the mold 3 is rotating, thereby roughly flattening the raw material. The scraper device 19 is arranged on the inner side of the frame 2. The scraper device 19, the mold 3 and the mold rotating device 20 are arranged in sequence up and down. The scraper device 19 includes a scraper bottom plate 191, a scraper electric cylinder 192 vertically arranged on the scraper bottom plate 191, a scraper connecting block 193 and a scraper 194. The scraper bottom plate 191 is horizontally bent and extends above the mold 3 to support the scraper electric cylinder 192. The output shaft of the scraper electric cylinder 192 is downwardly connected to the scraper 194 through the scraper connecting block 193. The scraper 194 extends into the mold 3 when working, and is driven by the scraper electric cylinder 192 to move up and out of the mold 3 when not working. Fig. 9 The same applicant applied for authorization announcement number CN202640186U, automatic scraping device 19 for multi-station grinding wheel forming machine, in which the functions and operating principles of the mold rotating device 20 and the scraping device 19 are disclosed, which will not be repeated here.

[0068] 3. After the first feeding, the glass fiber mesh is placed in the mold 3 through the mesh placing station 8. The mesh placing station 8 includes a mesh delivery device 21 and a baking net device 22. The mesh delivery device 21 includes a mesh storage mechanism arranged outside the frame 2 and a mesh clamping mechanism arranged inside the frame 2. Fig.10 shown.

[0069] The mesh storage mechanism includes a mesh stack 211 formed by stacking a number of glass fiber meshes, a mesh stack lifting unit 212 for driving the mesh stack 211 to rise and fall, and a mesh picking unit 213 for continuously picking up a single mesh, wherein the mesh picking unit 213, the mesh stack 211, and the mesh stack lifting unit 212 are sequentially arranged up and down. The mesh clamping mechanism includes a mesh linear module 214 and a clamping claw cylinder 215 controlled by the mesh linear module 214, wherein the mesh linear module 214 spans over the slideway 1, and the mesh linear module 214 drives the clamping claw cylinder 215 to reciprocate inside and outside the frame 2.

[0070] The mesh storage mechanism and the mesh clamping mechanism cooperate to realize the picking and placing of mesh. Specifically, the mesh stack lifting unit 212 continuously drives the mesh stack 211 to move upward, and the mesh picking unit 213 picks up a single glass fiber mesh, and then the mesh linear module 214 drives the clamping claw cylinder 215 to move close to the mesh picking unit 213, and the clamping claw cylinder 215 clamps the picked glass fiber mesh, and then the mesh linear module 214 drives the glass fiber mesh to move above the mold 3 and puts it into the mold 3.

[0071] The same applicant applied for authorization announcement number CN210619522U, a delivery mechanism for large-diameter glass fiber mesh, which has disclosed the functions and operating principles of the mesh delivery device 21, which will not be repeated here.

[0072] In order to promote the mating of the glass fiber mesh with the raw material, a baking net device 22 is used to soften the mesh, thereby ensuring that the mesh can be evenly attached to the scraped raw material surface. The baking net device 22 includes a baking net bottom plate 221, a baking net cylinder 222 arranged on the baking net bottom plate 221, and a baking net cover 223 controlled by the baking net cylinder 222. The baking net bottom plate 221 is horizontally bent and extended to the top of the mold 3, and then connected to the baking net cylinder 222. The baking net cylinder 222 is inverted, and the piston rod of the baking net cylinder 222 is downwardly connected to the baking net cover 223. The baking net cover 223 is a circular cover, and the inner wall of the baking net cover 223 is coated with heating wires. The size of the baking net cover 223 is adapted to the mold 3. After the mesh is placed in the mold 3, the baking net cylinder 222 drives the baking net cover 223 to move downward and close to the mold 3. The heating effect of the heating wire promotes the softening of the mesh, ensuring that the subsequent mesh and the raw material are well combined.

[0073] 4. After placing the glass fiber mesh in the mold 3, the mesh and the raw material are pressed by the mesh pressing station 9 to make the two better combined. The mesh pressing station 9 includes a mesh pressing device 23, which includes a mesh pressing bottom plate 231, a mesh pressing cylinder 232 and a mesh pressing plate 233. A mesh pressing shield is arranged around the mesh pressing bottom plate 231, and a mesh pressing cylinder 232 is vertically arranged on the mesh pressing bottom plate 231. The piston rod of the mesh pressing cylinder 232 is downwardly connected to the circular mesh pressing plate 233, as shown in FIG. Fig.11 shown.

[0074] When the mesh pressing device 23 is in operation: when the mold 3 carrying the raw material and the mesh is pushed to the mesh pressing device 23 and lowered, the mesh pressing cylinder 232 drives the mesh pressing plate 233 to move downward, and the mesh is pressed down by the circular mesh pressing plate 233 to ensure that the mesh and the raw material fit closely. The mesh pressing plate 233 has a hole in the center to allow the core rod to be positioned to ensure that the mesh pressing plate 233 can extend into the mold 3.

[0075] 5. After the glass fiber mesh is pressed, the secondary feeding station 10 feeds the material into the mold 3 again. The secondary feeding station 10 has the same structure and the same operating principle as the primary feeding station 7. Fig.12 The secondary feeding and spreading station 10 can be used to quantitatively feed materials into the mold 3. While feeding, the mold 3 is rotating to ensure uniformity of feeding. Moreover, the feeding and rotating process can also be used to flatten the fed raw materials. This will not be described in detail here.

[0076] 6. In the primary feeding and spreading station 7 and the secondary feeding and spreading station 10, the scraper device 19 is used to roughly scrape the raw materials. After the secondary feeding and spreading station 10, the raw materials need to be finely scraped. Here, the fine spreading station 11 is used to finely scrape the raw materials. The fine spreading station 11 includes a scraper device 19 and a mold rotating device 20. The scraper device 19 and the mold rotating device 20 are the same as those described above and will not be described here. The difference is that in the fine spreading station 11, the control accuracy of the two devices is improved, thereby improving the flatness of the raw material surface and ensuring the stability of the subsequent placement of the trademark paper and the core ring.

[0077] 7. After the secondary raw materials are finely spread, there is an empty station 12, where no equipment is arranged, and the raw materials and mold 3 are not processed, and the mold 3 only passes through the empty station 12. However, the unloading station 16 in another set of production stations crosses the empty station 12 and extends outside the frame 2.

[0078] 8. After flowing through the empty station 12, the mold 3 arrives at the trademark core ring station 13, and the trademark core ring station 13 is used to put the trademark paper and the core ring into the mold 3. The trademark core ring station 13 includes a trademark core ring picking machine 24. The trademark core ring picking machine 24 includes a trademark core ring storage device arranged on the outside of the frame 2 and a trademark core ring picking mechanism arranged on the inside of the frame 2.

[0079] The trademark core ring storage device includes a core ring vibration plate 241 for storing core rings, a core ring belt conveyor 242, a core ring connecting plate 243, a trademark pile 244 formed by stacking a number of trademark papers, and a trademark lifting unit 245 for driving the trademark pile 244 to move up and down. The core ring vibration plate 241 outlet, the core ring belt conveyor 242 and the core ring connecting plate 243 are connected in sequence, and the core ring vibration plate 241 can sequentially convey the core rings to the core ring belt conveyor 242, and the core rings finally flow to the top of the core ring connecting plate 243. The trademark lifting unit 245 is arranged below the trademark pile 244, and the trademark lifting unit 245 can drive the trademark pile 244 to move upward.

[0080] The trademark core ring picking mechanism includes a trademark core ring linear module 246, a core ring picking unit 247 and a trademark picking unit 248 controlled by the trademark core ring linear module 246. The trademark core ring linear module 246 spans over the slideway 1, and the trademark core ring linear module 246 drives the core ring picking unit 247 and the trademark picking unit 248 to reciprocate inside and outside the frame 2. The core ring picking unit 247 is used to pick up the core ring on the core ring receiving plate 243, and the trademark picking unit 248 is used to pick up the trademark paper on the top layer of the trademark stack 244.

[0081] like Fig.13As shown, the operating principle of the trademark core ring picking machine 24 is: after the mold 3 moves to the position of the trademark core ring picking machine 24, the trademark core ring linear module 246 simultaneously drives the core ring picking unit 247 and the trademark picking unit 248 to move outside the frame 2, and the core ring picking unit 247 picks up a core ring. At the same time, the trademark picking unit 248 picks up a piece of trademark paper, and then the trademark core ring linear module 246 simultaneously drives the core ring picking unit 247 and the trademark picking unit 248 to reset. During the resetting process, the trademark picking unit 248 first places the carried trademark paper in the mold 3, and then the core ring picking unit 247 places the carried core ring in the mold 3 and sleeves it on the outside of the core rod.

[0082] The same applicant applied for the authorization publication number CN202640187U, a multi-station grinding wheel forming machine automatic core ring placing device, which has disclosed the operating principle of core ring storage and picking. The same applicant also applied for the authorization publication number CN110371418A, a trademark paper sorting and conveying device, which has disclosed the operating principle of trademark paper storage and picking, which will not be repeated here.

[0083] 9. After the core ring and the label paper are placed in the mold 3, the mold 3 is moved to the pressing station 14. The pressing station 14 includes a hydraulic press 26 with an upper pressing head 25. The hydraulic press 26 adopts a three-beam four-column hydraulic press 26, such as Fig.14 When the mold 3 moves to the pressing station 14 and stops, the hydraulic press 26 drives the upper pressing head 25 to move downward, and the upper pressing head 25 is extended into the mold 3 to press the raw material, the core ring and the trademark paper, thereby forming the grinding wheel.

[0084] 10. After the upper pressing head 25 moves down to form, it is driven by the hydraulic press 26 to reset. Since the upper pressing head 25 contacts the raw material, it is inevitable that the raw material will adhere to it during the pressing process, so that the upper pressing head 25 will adhere to the grinding wheel when it moves up. Therefore, the raw material adhering to the upper pressing head 25 needs to be cleaned by the waxing station 15, and plaster is applied for lubrication. The waxing station 15 includes an upper pressing head waxing device 27, which is arranged above the frame 2. The upper pressing head waxing device 27 includes a waxing frame 271 swingingly arranged on the frame 2, a swinging cylinder 272, an inner cylinder 273, a waxing connecting rod frame 274, a waxing motor 275 and a waxing plate 276, as shown in FIG. Fig.15 shown.

[0085] The piston rod of the swing cylinder 272 is connected to the waxing frame 271, which can drive the waxing frame 271 to swing. The inner cylinder 273 is vertically arranged in the waxing frame 271. The waxing frame 271 is provided with a waxing connecting rod frame 274 for lifting. The piston rod of the inner cylinder 273 is upwardly connected to the waxing connecting rod frame 274, which can drive the waxing connecting rod frame 274 to lift up and down. The waxing connecting rod frame 274 has a certain length. A waxing motor 275 is arranged at one end of the waxing connecting rod frame 274. The waxing motor 275 corresponds to the inner cylinder 273 up and down. A waxing disk 276 is rotatably arranged at the other end of the waxing connecting rod frame 274. The waxing disk 276 is driven by the waxing motor 275, which can drive the waxing disk 276 to rotate.

[0086] The principle of the upper pressure head wax coating device 27 is as follows: after the upper pressure head 25 is reset under the drive of the hydraulic cylinder, the swing cylinder 272 pushes the wax coating frame 271 and the wax coating connecting rod frame 274 to swing together, so that the wax coating disc 276 rotates to the bottom of the upper pressure head 25; the wax coating cylinder drives the wax coating connecting rod frame 274 to move upward, so that the wax coating disc 276 contacts the upper pressure head 25; the wax coating motor 275 starts to drive the wax coating disc 276 to rotate, thereby lubricating the surface of the upper pressure head 25. The same applicant applied for the authorization announcement number CN210358253U, the pressure head automatic swing cleaning device, which has disclosed the operation process of the upper pressure head wax coating device 27, which will not be repeated here.

[0087] XI. The grinding wheel after pressing and forming needs to be taken out at the end, that is, it is taken out through the unloading station 16. The unloading station 16 is the end of the production station. The unloading station 16 includes a mold ejection device 28, a grinding wheel pickup device 29 and a flat belt conveyor 30. The grinding wheel pickup device 29 and the mold ejection device 28 are respectively arranged above and below the frame 2, and the mold 3 is arranged between the grinding wheel pickup device 29 and the mold ejection device 28.

[0088] The mold ejection device 28 includes a mold unloading cylinder 281, a mold unloading plate 282 and a mold unloading rod 283. The piston rod of the mold unloading cylinder 281 is connected to the mold unloading plate 282 upward. A plurality of mold unloading rods 283 are provided circumferentially on the mold unloading plate 282. When working, the mold unloading rods 283 are tightly pressed against the bottom of the mold 3. The mold unloading cylinder 281 drives the mold unloading plate 282 and the mold unloading rod 283 to move upward together, thereby ejecting the mold bottom upward, and then the formed grinding wheel can be separated from the mold 3.

[0089] The grinding wheel picking device 29 includes a picking frame 291 horizontally arranged above the frame 2, a picking linear module 292 arranged on the picking frame 291, and a grinding wheel picking mechanism 293 slidably connected to the picking frame 291 and controlled by the picking linear module 292. The grinding wheel picking mechanism 293 slides inside and outside the frame 2. After the grinding wheel picking mechanism 293 picks up the grinding wheel, it moves to the flat belt conveyor 30 driven by the picking linear module 292, and finally the grinding wheel is transferred to the flat belt conveyor 30. The same applicant applied for authorization announcement No. 201910941801.0, a molding grinding wheel automatic unloading mechanism, which has disclosed the operating principles of the mold ejection device 28, the grinding wheel picking device 29 and the flat belt conveyor 30, which will not be repeated here.

[0090] Therefore, the mold 3 can produce a grinding wheel by flowing between the above sub-stations once. There are two sets of production stations on the frame 2, and the operating principle of the other set of production stations is the same as that of the frame 2. The mold 3 can produce two grinding wheels by flowing between the two sets of production stations once. With the circulation of the mold 3, uninterrupted production can be achieved. In this way, one device is equivalent to two devices, which can improve the production efficiency of the equipment.

[0091] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. Double press 22-station large slice automatic forming machine, characterized by: The invention comprises a frame (2) with a slideway (1) and a mold plate (4) with a mold (3), wherein the slideway (1) is bent in a "U" shape and arranged on the frame (2), and a plurality of mold plates (4) are arranged in sequence at the beginning and the end of the slideway (1), and the mold plates (4) are arranged on the frame (2) in a circular sliding manner along the slideway (1), and intermittent motion propulsion devices (5) for pushing the mold plates (4) to slide are also respectively arranged at the four corners of the frame (2); The frame (2) is in the shape of a square frame, and two sets of production stations are arranged diagonally on the frame (2). The mold car plate (4) carries the mold (3) and circulates back and forth between the two sets of production stations. Each set of production stations includes a bottom pressing station (6), a primary feeding and spreading station (7), a net placing station (8), a net pressing station (9), a secondary feeding and spreading station (10), a fine spreading station (11), an empty station (12), a trademark core ring station (13), a pressing station (14), a wax coating station (15), and a mold unloading station (16); The bottom pressing station (6) includes a bottom pressing plate device (17), the primary feeding and spreading station (7) includes a feeding device (18), a scraping device (19) and a mold rotating device (20), the net placing station (8) includes a net feeding device (21) and a net baking device (22), the net pressing station (9) includes a net pressing device (23), the secondary feeding and spreading station (10) and the primary feeding and spreading station (7) have the same structure, the fine spreading station (11) includes a scraping device (19) and a mold rotating device (20), the trademark core ring station (13) includes a trademark core ring picking machine (24), the pressing station (14) includes a hydraulic press (26) with an upper pressure head (25), the wax coating station (15) includes an upper pressure head wax coating device (27), and the demolding station (16) includes a mold ejection device (28), a grinding wheel picking device (29) and a flat belt conveyor (30).

2. The double press 22-station large slice automatic forming machine according to claim 1 is characterized in that: In one set of production stations, a bottom pressing station (6), a primary feeding and spreading station (7), a net placing station (8), a net pressing station (9), a secondary feeding and spreading station (10), a fine spreading station (11), an empty station (12), a trademark core ring station (13), a pressing station (14), a wax coating station (15), and a mold unloading station (16) are sequentially arranged along the sliding direction of the mold vehicle plate (4); Another set of production stations, including a bottom pressing station (6), a primary feeding and spreading station (7), a net placing station (8), a net pressing station (9), a secondary feeding and spreading station (10), a fine spreading station (11), a trademark core ring station (13), a pressing station (14), a wax coating station (15), a mold unloading station (16), and an empty station (12), are arranged in sequence along the sliding direction of the mold vehicle plate (4).

3. The double press 22-station large slice automatic forming machine according to claim 2 is characterized in that: The slideway (1) is provided with spaces for accommodating a mold plate (4) at diagonal positions, and the mold plate (4) is centrally rotated to set the mold (3), wherein the mold (3) comprises a mold ring, a circular mold bottom arranged in the mold ring, and a core rod coaxially arranged on the mold bottom; The number of the intermittent motion propulsion devices (5) is four, and the intermittent motion propulsion devices (5) are arranged in groups of two, horizontally at one corner of the frame (2) and vertically at another corner of the frame (2). The intermittent motion propulsion devices (5) include a propulsion linear module (51) installed below the frame (2) and a slide (52) with a push head (53) controlled by the propulsion linear module (51), wherein the push head (53) pushes the mold vehicle plate (4) to move along the slideway (1).

4. The double press 22-station large slice automatic forming machine according to claim 2 is characterized in that: The bottom pressing plate device (17) comprises a bottom pressing mounting frame (171), a bottom pressing plate shield (172), a bottom pressing cylinder (173), a bottom plate reset plate (174) and an adjusting screw (175); the bottom pressing mounting frame (171) is arranged above the frame (2); the bottom pressing plate shield (172) is arranged around the bottom pressing mounting frame (171); the bottom pressing cylinder (173) is arranged vertically on the bottom pressing mounting frame (171); the piston rod of the bottom pressing cylinder (173) is downwardly connected to the circular bottom plate reset plate (174); and a plurality of adjusting screws (175) are arranged circumferentially on the bottom plate reset plate (174).

5. The double press 22-station large slice automatic forming machine according to claim 2 is characterized in that: The feeding device (18) is arranged outside the frame (2), and comprises a raw material vibration plate (181) and a weighing feeding mechanism arranged at intervals. The weighing feeding mechanism comprises a conveyor belt (182), a belt hopper (183) arranged above the conveyor belt (182), a chute (184) arranged obliquely below the conveyor belt (182), a weighing sensor (185), a tipping hopper (186) and a material guide trough (187) which are flippably arranged above the weighing sensor (185). The raw material vibration plate (181), the conveyor belt (182), the tipping hopper (186) and the material guide trough (187) are connected in sequence, and the outlet of the material guide trough (187) is tilted toward the mold (3); The scraper device (19) is arranged on the inner side of the frame (2), and comprises a scraper base plate (191), a scraper electric cylinder (192) vertically arranged on the scraper base plate (191), a scraper connecting block (193), and a scraper (194); the output shaft of the scraper electric cylinder (192) is connected to the scraper (194) downwardly through the scraper connecting block (193), and the scraper (194) extends into the mold (3); The mold rotating device (20) is arranged below the frame (2), and comprises a reduction motor (201), a turntable bearing seat (202), and a turntable panel (203). The output shaft of the reduction motor (201) passes through the turntable bearing seat (202) upward to connect to the turntable panel (203), and the turntable panel (203) and the mold (3) are matched in size.

6. The double press 22-station large slice automatic forming machine according to claim 2 is characterized in that: The mesh delivery device (21) comprises a mesh storage mechanism arranged on the outside of the frame (2) and a mesh clamping mechanism arranged on the inside of the frame (2); The mesh storage mechanism comprises a mesh stack (211) formed by stacking a plurality of glass fiber meshes, a mesh stack lifting unit (212) for driving the mesh stack (211) to lift and lower, and a mesh picking unit (213) for continuously picking up a single mesh, wherein the mesh picking unit (213), the mesh stack (211), and the mesh stack lifting unit (212) are arranged in sequence up and down; The mesh clamping mechanism comprises a mesh linear module (214) and a clamping claw cylinder (215) controlled by the mesh linear module (214); the mesh linear module (214) spans above the slideway (1); the mesh linear module (214) drives the clamping claw cylinder (215) to reciprocate inside and outside the frame (2); The grilling net device (22) comprises a grilling net bottom plate (221), a grilling net cylinder (222) arranged on the grilling net bottom plate (221), and a grilling net cover (223) controlled by the grilling net cylinder (222); the grilling net cover (223) is a circular cover; the inner wall of the grilling net cover (223) is coated with heating wires; and the grilling net cover (223) is of a size that matches the mold (3).

7. The double press 22-station large slice automatic forming machine according to claim 2 is characterized in that: The mesh pressing device (23) comprises a mesh pressing bottom plate (231), a mesh pressing cylinder (232) and a mesh pressing plate (233); a mesh pressing shield is arranged around the mesh pressing bottom plate (231); the mesh pressing cylinder (232) is arranged vertically on the mesh pressing bottom plate (231); and a piston rod of the mesh pressing cylinder (232) is downwardly connected to the circular mesh pressing plate (233).

8. The double press 22-station large slice automatic forming machine according to claim 2 is characterized in that: The trademark core ring picking machine (24) comprises a trademark core ring storage device arranged on the outside of the frame (2) and a trademark core ring picking mechanism arranged on the inside of the frame (2); The trademark core ring storage device comprises a core ring vibration plate (241) for storing core rings, a core ring belt conveyor (242), a core ring connecting plate (243), a trademark stack (244) formed by stacking a plurality of trademark papers, and a trademark lifting unit (245) for driving the trademark stack (244) to rise and fall. The outlet of the core ring vibration plate (241), the core ring belt conveyor (242) and the core ring connecting plate (243) are sequentially connected, and the trademark lifting unit (245) is arranged below the trademark stack (244); The trademark core ring picking mechanism comprises a trademark core ring linear module (246), a core ring picking unit (247) and a trademark picking unit (248) controlled by the trademark core ring linear module (246), wherein the trademark core ring linear module (246) spans above the slideway (1), and the trademark core ring linear module (246) simultaneously drives the core ring picking unit (247) and the trademark picking unit (248) to reciprocate inside and outside the frame (2).

9. The double press 22-station large slice automatic forming machine according to claim 2, characterized in that: The upper pressure head wax coating device (27) is arranged above the frame (2), and comprises a wax coating frame (271) swingably arranged on the frame (2), a swing cylinder (272), an inner cylinder (273), a wax coating connecting rod frame (274), a wax coating motor (275) and a wax coating plate (276); The piston rod of the swing cylinder (272) is connected to the wax coating frame (271) to drive the wax coating frame (271) to swing. The inner cylinder (273) is vertically arranged in the wax coating frame (271). The wax coating connecting rod frame (274) is lifted and lowered on the wax coating frame (271). The piston rod of the inner cylinder (273) is upwardly connected to the wax coating connecting rod frame (274). The wax coating motor (275) is arranged at one end of the wax coating connecting rod frame (274). The wax coating motor (275) and the inner cylinder (273) correspond to each other in upper and lower directions. The wax coating disc (276) is rotatably arranged at the other end of the wax coating connecting rod frame (274). The wax coating disc (276) and the wax coating motor (275) are driven by a belt.

10. The double press 22-station large slice automatic forming machine according to claim 2, characterized in that: The grinding wheel picking device (29) and the mold ejecting device (28) are respectively arranged above and below the frame (2), and a mold (3) is arranged between the grinding wheel picking device (29) and the mold ejecting device (28); The mold ejection device (28) comprises a mold unloading cylinder (281), a mold unloading plate (282) and a mold unloading rod (283); the piston rod of the mold unloading cylinder (281) is upwardly connected to the mold unloading plate (282); a plurality of mold unloading rods (283) are circumferentially arranged on the mold unloading plate (282); the mold unloading rods (283) are tightly pressed against the bottom of the mold (3); The grinding wheel picking device (29) comprises a picking frame (291) horizontally arranged above the frame (2), a picking linear module (292) arranged on the picking frame (291), and a grinding wheel picking mechanism (293) slidably connected to the picking frame (291) and controlled by the picking linear module (292); the grinding wheel picking mechanism (293) picks up the grinding wheel and transfers it to the flat belt conveyor (30).

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