Hot press for rapid forming of brake pad

Abstract

The invention relates to the technical field of brake pad machining devices, and particularly discloses a brake pad rapid forming hot press which comprises a hydraulic machine and a supporting table, a horizontal sliding table is arranged at the top of the supporting table, a filling assembly is arranged on the horizontal sliding table, and the filling assembly comprises a filling assembly, a mounting bottom plate and a forming mold. The filling assembly is used for filling powder into the forming mold, the preheating forming assembly comprises a pressure applying plate and a plurality of lifting frames, and a plurality of upper pressure applying modules are arranged at the bottom of the pressure applying plate. According to the brake pad, the internal temperature and the surface temperature of the brake pad tend to be consistent, cracks are avoided, the use safety of the brake pad is ensured, and in the subsequent hot pressing process, the good fusion state can be further enhanced, so that the overall performance of the brake pad is improved, and the stability and the wear resistance of the friction coefficient can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of brake pad processing devices, in particular to a hot press machine for rapid prototyping of brake pads. Background Art

[0002] Brake pads are key components in the automotive braking system and are also used in other mechanical equipment that require braking, such as motorcycles, trains, etc. They mainly convert the kinetic energy of vehicles or equipment into heat energy through friction, thereby stopping or slowing down the wheels or moving parts.

[0003] Brake pads are usually formed by hot pressing. When the hot press is working, the prepared brake pad raw material is placed in the mold. The hot press applies pressure to the mold through two upper and lower hot pressing heads (or multiple hot pressing heads, depending on the specific equipment design). The pressure can be adjusted according to the size and material of the brake pad. At the same time, the hot pressing head will heat up, and the heat will be transferred to the mold and the brake pad raw material. Under the combined action of high temperature and high pressure, the binder in the brake pad raw material will undergo physical changes such as melting or softening, so that the friction material and other components are closely combined. After a certain period of time, a brake pad with a certain shape and density requirements is formed.

[0004] For example, a brake pad hot press with patent number CN108749098A includes a machine body, an upper mold part, a middle mold part, a lower mold part, a guide device, a main hydraulic cylinder and two auxiliary hydraulic cylinders. This invention can effectively solve the problem that the hot press in the prior art requires multiple hydraulic cylinders to realize the automatic mold support function, has high energy consumption and complex equipment structure.

[0005] The prior art represented by the above-mentioned patent can reduce the number of hydraulic cylinders to simplify the equipment structure. However, the existing hot press can only heat the raw materials when hot pressing the brake raw materials. Due to the short heating time, the temperature inside the brake pad is lower than its surface temperature. This causes the surface material to be more easily compacted under pressure, while the internal material has poor fluidity and plasticity due to its low temperature. This will eventually lead to cracks in the area of ​​internal stress concentration during subsequent use. In severe cases, it may cause the brake pad to rupture, posing a serious safety hazard. Summary of the invention

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hot press for rapid prototyping of brake pads, comprising a hydraulic press and a support platform arranged beside the hydraulic press, a horizontal slide is arranged on the top of the support platform, a filling assembly is arranged on the horizontal slide, the filling assembly comprises a filling assembly, a mounting base plate and a forming mold, the mounting base plate is detachably connected to the top of the horizontal slide, the forming mold is rotatably connected to the horizontal slide, and the filling assembly is used to fill powder into the forming mold; It also includes a preheating forming component, which includes a pressure plate and a plurality of lifting frames. A plurality of upper pressure modules are arranged at the bottom of the pressure plate. The plurality of lifting frames are arranged on a side of the support platform close to the hydraulic press. The plurality of lifting frames are used to lift the pressure plate.

[0007] Through the above technical scheme, the present invention can pre-compact the powder filled in the forming mold through the multiple upper pressure modules at the bottom of the pressure plate before hot pressing the brake pad, and can also preheat the powder filled in the forming mold. By pre-compacting the powder, the powder can be initially distributed more tightly and evenly in the mold. During the subsequent hot pressing, since a certain compaction foundation has been established in the early stage, the pressure generated by the hot pressing can be more evenly transmitted to each part of the powder, so that the density of the molded brake pad is more uniform in the entire thickness direction and the plane direction. By preheating the powder, the preheating process can activate the binder and other components in the powder in advance, so that in the pre-compacting stage, the binder can better fuse with other components such as friction materials, and can make the internal and surface temperatures of the brake pad more consistent, so that cracks will not appear in the area where the internal stress is concentrated, ensuring the safety of the brake pad during use. In the subsequent hot pressing process, this good fusion state can be further strengthened, thereby improving the overall performance of the brake pad, and improving the stability and wear resistance of the friction coefficient.

[0008] Furthermore, each lifting frame is provided with a telescopic rod, and a plurality of docking grooves are provided at the bottom of the pressure plate. The number of the docking grooves is equal to and corresponds to the telescopic rods, and the movable end of each telescopic rod cooperates with the corresponding docking groove.

[0009] Through the above technical solution, when multiple telescopic rods are extended, they can be inserted into the corresponding docking grooves. At this time, the height of the pressure plate can be controlled by lifting the lifting frame. When the powder in the molding mold is filled, the multiple telescopic rods are retracted at the same time. At this time, the multiple pressure modules on the pressure plate can be quickly lowered to pre-compact and preheat the powder in the molding mold.

[0010] Furthermore, the forming mold is provided with a plurality of brake pad forming grooves, the number of the brake pad forming grooves is equal to and corresponds one to one with the pressure modules, and each of the pressure modules cooperates with the corresponding brake pad forming groove.

[0011] Furthermore, the molding die and the plurality of upper pressure modules are provided with heating elements.

[0012] Through the above technical solution, the preheating and pre-compacting of the powder in the forming mold can be completed through the mutual extrusion and heating of the pressure module and the brake pad forming groove.

[0013] Furthermore, a plurality of steel back mounting grooves are provided on the mounting base plate, the number of the steel back mounting grooves is equal to and corresponds one to one with the brake pad forming grooves, and each of the steel back mounting grooves matches the position of the corresponding brake pad forming groove.

[0014] Through the above technical solution, before the brake pad is hot-pressed, the steel back can be placed in the corresponding steel back installation groove for fixation.

[0015] Furthermore, the loading assembly also includes a flipping component, which includes a support seat, a rotating shaft and a first servo electric cylinder. The support seat is arranged on the top of the horizontal slide, the rotating shaft is fixedly connected to the molding mold, the rotating shaft is rotatably connected to the support seat, the first servo electric cylinder is fixedly connected to the top of the horizontal slide, and the first servo electric cylinder cooperates with the rotating shaft structure.

[0016] Furthermore, a driving gear is provided on the rotating shaft, a sliding guide seat is provided on the top of the horizontal slide, a pushing rack is slidably connected to the sliding guide seat, the movable end of the first servo electric cylinder is fixedly connected to the pushing rack, and the driving gear is meshed with the pushing rack.

[0017] Through the above technical solution, after the steel back is installed, the first servo electric cylinder is started to drive the forming mold to flip, so that the steel back installation groove matches the corresponding brake pad forming groove position, which is convenient for the subsequent addition of powder.

[0018] Furthermore, a plurality of limit sliding rods are arranged on the top of the horizontal slide, a plurality of positioning holes are opened on the pressure plate, the number of the positioning holes is equal to and corresponds one to one to the limit sliding rods, and each of the limit sliding rods is slidably matched with the corresponding positioning hole.

[0019] Through the above technical solution, multiple limiting slide bars can limit the position of the pressure plate and multiple upper pressure modules at its bottom, ensuring that the pressure plate can fall along the direction of the limiting slide bars to avoid its deviation, thereby ensuring that the pressure modules can enter the corresponding brake pad molding grooves.

[0020] Furthermore, the filling assembly includes a plurality of lifting legs, a lifting platform is arranged on the top of the plurality of lifting legs, a first feeder and a second feeder are arranged on the top of the lifting platform, and a control panel for controlling the first feeder and the second feeder is arranged on the top of the lifting platform.

[0021] Furthermore, a plurality of feeding ports are provided at the bottom of the lifting platform, each of which includes two filling nozzles, which are respectively connected to the discharge ports of the first feeder and the second feeder, and a rotating sleeve is rotatably connected to the outer wall of each of the filling nozzles, and a connecting gear is sleeved on each of the rotating sleeves, and a plurality of stirring rods are arranged around the outer wall of the bottom of each rotating sleeve, and the connecting gears on the two filling nozzles in each feeding port are meshed with each other, and a plurality of guide rods are provided at the bottom of the lifting platform, and a driving rack is slidably connected to each of the guide rods, and the plurality of driving racks are connected by connecting rods, and the connecting gear on one of the filling nozzles in each feeding port is meshed with a driving rack, and a second servo electric cylinder is also provided at the bottom of the lifting platform, and the movable end of the second servo electric cylinder is connected to the connecting rod.

[0022] Through the above technical solution, when the steel back mounting groove matches the corresponding brake pad forming groove position, the first feeder and the second feeder can sequentially add the configured powder into the brake pad forming groove. Then, multiple stirring rods will rotate to fully stir the powder to make it evenly distributed, so as to ensure the quality of the brake pad during the subsequent hot pressing of the powder.

[0023] Compared with the prior art, the present invention provides a hot press for rapid prototyping of brake pads, which has the following beneficial effects: Firstly, the present invention can pre-compact the powder filled in the forming mold through the multiple upper pressure modules at the bottom of the pressure plate before hot pressing the brake pad, and can also preheat the powder filled in the forming mold. By pre-compacting the powder, the powder can be initially distributed more tightly and evenly in the mold. During the subsequent hot pressing, since a certain compaction foundation has been laid in the early stage, the pressure generated by the hot pressing can be more evenly transmitted to each part of the powder, so that the density of the formed brake pad is more uniform in the entire thickness direction and the plane direction. By preheating the powder, the preheating process can activate the binder and other components in the powder in advance, so that in the pre-compacting stage, the binder can better fuse with other components such as the friction material, and can make the internal and surface temperatures of the brake pad more consistent, so that cracks will not appear in the area where the internal stress is concentrated, ensuring the safety of the brake pad during use. In the subsequent hot pressing process, this good fusion state can be further strengthened, thereby improving the overall performance of the brake pad, and improving the stability and wear resistance of the friction coefficient.

[0024] Secondly, in the present invention, when the multiple telescopic rods are extended, they can be stuck in the corresponding docking grooves. At this time, the height of the pressure plate can be controlled by lifting the lifting frame. When the powder in the molding mold is filled, the horizontal slide moves to the right, and the multiple telescopic rods shrink at the same time. At this time, the multiple pressure modules on the pressure plate can be quickly lowered to pre-compact and preheat the powder in the molding mold.

[0025] Thirdly, in the present invention, after the steel back mounting groove matches the corresponding brake pad forming groove position, the first feeder and the second feeder can sequentially add the configured powder into the brake pad forming groove, and then each connecting gear will drive the rotating sleeve to rotate back and forth, so that multiple stirring rods can rotate back and forth. Different from the prior art that rotates in one direction, the material will not be stirred to both sides, but the powder can be fully stirred to make it evenly distributed, so as to ensure the quality of the brake pad when the powder is subsequently hot-pressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3 It is a partial schematic diagram of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 It is a structural schematic diagram of the steel back installation groove in the present invention; Figure 6 It is a structural schematic diagram of the filling component in the present invention; Figure 7 for Figure 6 Enlarged view of point B in the middle; Figure 8 It is a schematic diagram of the structure of the connecting gears in the present invention; Fig. 9 It is a partial structural schematic diagram of the preheating forming component in the present invention; Fig.10 It is a structural schematic diagram of the upper pressure module in the present invention; Fig.11 for Fig.10 Enlarged view of point C in the middle; Fig.12 It is a schematic diagram of the top view of the forming mold in the present invention.

[0027] Among them: 1. hydraulic press; 2. support platform; 3. horizontal slide; 4. lifting platform; 5. filling assembly; 6. pressure plate; 7. forming mold; 8. brake pad forming groove; 9. limit slide rod; 10. lifting frame; 11. support seat; 12. rotating shaft; 13. driving gear; 14. sliding guide seat; 15. pushing rack; 16. first servo electric cylinder; 17. steel back mounting groove; 18. positioning hole; 19. upper pressure module; 20. first feeder; 21. second feeder; 22. control panel; 23. lifting leg; 24. guide rod; 25. filling nozzle; 26. rotating sleeve; 27. stirring rod; 28. connecting gear; 29. ​​driving rack; 30. second servo electric cylinder; 31. connecting rod; 32. telescopic rod; 33. docking groove; 34. installation base plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 12 The present invention provides a technical solution: a hot press for rapid prototyping of brake pads, comprising a hydraulic press 1 and a support platform 2 arranged beside the hydraulic press 1, a horizontal slide 3 is arranged on the top of the support platform 2, a filling component is arranged on the horizontal slide 3, the filling component comprises a filling component 5, a mounting base plate 34 and a forming mold 7, the mounting base plate 34 is detachably connected to the top of the horizontal slide 3, the forming mold 7 is rotatably connected to the horizontal slide 3, and the filling component 5 is used to fill powder into the forming mold 7; It also includes a preheating forming component, which includes a pressure plate 6 and a plurality of lifting frames 10. A plurality of upper pressure modules 19 are arranged at the bottom of the pressure plate 6. The plurality of lifting frames 10 are all arranged on one side of the support platform 2 close to the hydraulic press 1. The plurality of lifting frames 10 are used to lift the pressure plate 6.

[0030] The present invention can pre-compact the powder filled in the forming mold 7 through the multiple upper pressure modules 19 at the bottom of the pressure plate 6 before hot pressing the brake pad, and can also preheat the powder filled in the forming mold 7. By pre-compacting the powder, the powder can be initially distributed more tightly and evenly in the mold. During the subsequent hot pressing, since a certain compaction foundation has been laid in the early stage, the pressure generated by the hot pressing can be more evenly transmitted to each part of the powder, so that the density of the molded brake pad is more uniform in the entire thickness direction and the plane direction. By preheating the powder, the preheating process can activate the binder and other components in the powder in advance, so that in the pre-compacting stage, the binder can better fuse with other components such as the friction material, and can make the internal and surface temperatures of the brake pad more consistent, so that cracks will not appear in the area where the internal stress is concentrated, ensuring the safety of the brake pad during use. In the subsequent hot pressing process, this good fusion state can be further strengthened, thereby improving the overall performance of the brake pad, and improving the stability and wear resistance of the friction coefficient.

[0031] It should be noted that the horizontal slide 3 can move left and right on the support platform 2, such as Figure 5 As shown, when the horizontal slide 3 moves to the left, it is convenient to put in the steel back.

[0032] See also Figure 9-11 Each lifting frame 10 is provided with a telescopic rod 32, and a plurality of docking grooves 33 are provided at the bottom of the pressure plate 6. The number of the docking grooves 33 is equal to and corresponds to the number of the telescopic rods 32, and the movable end of each telescopic rod 32 is matched with the corresponding docking groove 33.

[0033] Through such an arrangement, when the multiple telescopic rods 32 are extended, they can be inserted into the corresponding docking grooves 33. At this time, the height of the pressure plate 6 can be controlled by lifting and lowering the lifting frame 10. When the powder in the molding mold 7 is filled, the horizontal slide 3 moves to the right, and the multiple telescopic rods 32 shrink at the same time. At this time, the multiple pressure modules on the pressure plate 6 can be quickly lowered to pre-compact and preheat the powder in the molding mold 7.

[0034] See also Figure 3-Figure 5 A plurality of brake pad forming grooves 8 are provided on the forming mold 7. The number of the brake pad forming grooves 8 is equal to and corresponds to the pressure modules. Each pressure module cooperates with the corresponding brake pad forming groove 8. A heating element is provided in the forming mold 7 and the plurality of upper pressure modules 19. It should be noted that the heating element in the present invention may be an electric heating wire, which is a prior art and is not shown in the figure.

[0035] It should be noted that the preheating and pre-compaction of the powder in the forming mold 7 can be completed through the mutual extrusion and heating effect between the pressure module and the brake pad forming groove 8.

[0036] See also Figure 3-Figure 5 A plurality of steel back mounting grooves 17 are provided on the mounting base plate 34. The number of the steel back mounting grooves 17 and the brake pad forming grooves 8 are equal and correspond one to one. Each steel back mounting groove 17 matches the position of the corresponding brake pad forming groove 8. Before the brake pad is hot-pressed, the steel back can be placed in the corresponding steel back mounting groove 17 for fixation. The steel back can be placed manually or automatically by a robot.

[0037] See also Figure 2-Figure 5 The loading assembly also includes a flipping component, which includes a support seat 11, a rotating shaft 12 and a first servo electric cylinder 16. The support seat 11 is arranged at the top of the horizontal slide 3, the rotating shaft 12 is fixedly connected to the molding mold 7, the rotating shaft 12 is rotatably connected to the support seat 11, the first servo electric cylinder 16 is fixedly connected to the top of the horizontal slide 3, the first servo electric cylinder 16 and the rotating shaft 12 structure are matched, a driving gear 13 is arranged on the rotating shaft 12, a sliding guide seat 14 is arranged on the top of the horizontal slide 3, a pushing rack 15 is slidably connected to the sliding guide seat 14, the movable end of the first servo electric cylinder 16 is fixedly connected to the pushing rack 15, and the driving gear 13 is meshed with the pushing rack 15.

[0038] Through such an arrangement, when the steel back is installed, the first servo electric cylinder 16 is started, driving the push rack 15 to move to the left, and then the push rack 15 drives the driving gear 13 to rotate clockwise, thereby driving the forming mold 7 to flip clockwise, so that the steel back installation groove 17 matches the corresponding brake pad forming groove 8 position, which is convenient for the subsequent addition of powder. Conversely, when the brake pad is completed after hot pressing, it can drive the forming mold 7 to flip counterclockwise, and the formed brake pad can be quickly removed.

[0039] See also Figure 5 A plurality of limiting slide bars 9 are arranged on the top of the horizontal slide table 3, and a plurality of positioning holes 18 are opened on the pressure plate 6. The number of positioning holes 18 is equal to and corresponds to the limiting slide bars 9. Each limiting slide bar 9 slides in cooperation with the corresponding positioning hole 18. Through such a setting, the plurality of limiting slide bars 9 can limit the position of the pressure plate 6 and the plurality of upper pressure modules 19 at the bottom thereof, ensuring that the pressure plate 6 can fall along the direction of the limiting slide bars 9 to avoid its deviation, so as to ensure that the pressure module can enter the corresponding brake pad forming groove 8.

[0040] See also Figure 6-Figure 8 The filling assembly 5 includes a plurality of lifting legs 23, a lifting platform 4 is arranged on the top of the plurality of lifting legs 23, a first feeder 20 and a second feeder 21 are arranged on the top of the lifting platform 4, and a control panel 22 for controlling the first feeder 20 and the second feeder is arranged on the top of the lifting platform 4.

[0041] A plurality of feeding ports are provided at the bottom of the lifting platform 4, each of which includes two filling nozzles 25, which are respectively connected to the discharge ports of the first feeder 20 and the second feeder 21. A rotating sleeve 26 is rotatably connected to the outer wall of each filling nozzle 25, and a connecting gear 28 is sleeved on each rotating sleeve 26. A plurality of stirring rods 27 are arranged around the outer wall of the bottom of each rotating sleeve 26, and the connecting gears 28 on the two filling nozzles 25 in each feeding port are meshed with each other. A plurality of guide rods 24 are provided at the bottom of the lifting platform 4, and a driving rack 29 is slidably connected to each guide rod 24. The plurality of driving racks 29 are connected by connecting rods 31, and the connecting gear 28 on one of the filling nozzles 25 in each feeding port is meshed with a driving rack 29. A second servo electric cylinder 30 is also provided at the bottom of the lifting platform 4, and the movable end of the second servo electric cylinder 30 is connected to the connecting rod 31.

[0042] It is worth mentioning that when the steel back mounting groove 17 matches the corresponding brake pad forming groove 8 position, the first feeder 20 and the second feeder 21 can sequentially add the configured powder into the brake pad forming groove 8, and then, the movable end of the second servo electric cylinder 30 can reciprocate, thereby driving multiple drive racks 29 to slide back and forth, thereby driving the connecting gear 28 on one of the filling nozzles 25 in each feeding port to rotate, and since the connecting gears 28 on the two filling nozzles 25 in each feeding port are meshed, each connecting gear 28 will drive the rotating sleeve 26 to rotate back and forth, so that multiple stirring rods 27 can rotate back and forth, which is different from the rotation in one direction in the prior art. The material will not be stirred to both sides, but the powder can be fully stirred to make it evenly distributed, so as to ensure the quality of the brake pad during the subsequent hot pressing of the powder.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot press for rapid prototyping of brake pads, comprising a hydraulic press (1) and a support platform (2) arranged beside the hydraulic press (1), characterized in that: A horizontal slide (3) is arranged on the top of the support platform (2), and a filling assembly is arranged on the horizontal slide (3), wherein the filling assembly comprises a filling assembly (5), a mounting base plate (34) and a forming mold (7), wherein the mounting base plate (34) is detachably connected to the top of the horizontal slide (3), and the forming mold (7) is rotatably connected to the horizontal slide (3), and the filling assembly (5) is used to fill powder into the forming mold (7); It also includes a preheating forming component, which includes a pressure plate (6) and a plurality of lifting frames (10), a plurality of upper pressure modules (19) are arranged at the bottom of the pressure plate (6), and the plurality of lifting frames (10) are all arranged on a side of the support platform (2) close to the hydraulic press (1), and the plurality of lifting frames (10) are used to lift the pressure plate (6).

2. A hot press machine for rapid prototyping of brake pads according to claim 1, characterized in that: Each of the lifting frames (10) is provided with a telescopic rod (32), and a plurality of docking grooves (33) are provided at the bottom of the pressure plate (6). The number of the docking grooves (33) is equal to and corresponds to the number of the telescopic rods (32), and the movable end of each telescopic rod (32) is matched with the corresponding docking groove (33).

3. A hot press machine for rapid prototyping of brake pads according to claim 2, characterized in that: The forming die (7) is provided with a plurality of brake pad forming grooves (8), the number of the brake pad forming grooves (8) being equal to and corresponding to the pressure applying modules, and each of the pressure applying modules is matched with a corresponding brake pad forming groove (8).

4. A hot press machine for rapid prototyping of brake pads according to claim 3, characterized in that: The forming die (7) and the plurality of upper pressure modules (19) are both provided with heating elements.

5. A hot press machine for rapid prototyping of brake pads according to claim 4, characterized in that: The mounting base plate (34) is provided with a plurality of steel back mounting grooves (17), the number of the steel back mounting grooves (17) being equal to and corresponding to the brake pad forming grooves (8), and each of the steel back mounting grooves (17) matches the position of the corresponding brake pad forming groove (8).

6. The hot press machine for rapid prototyping of brake pads according to claim 1, characterized in that: The loading assembly also includes a flipping component, which includes a support seat (11), a rotating shaft (12) and a first servo electric cylinder (16). The support seat (11) is arranged on the top of the horizontal slide (3), the rotating shaft (12) is fixedly connected to the molding die (7), the rotating shaft (12) is rotatably connected to the support seat (11), the first servo electric cylinder (16) is fixedly connected to the top of the horizontal slide (3), and the first servo electric cylinder (16) and the rotating shaft (12) structure cooperate.

7. A hot press machine for rapid prototyping of brake pads according to claim 6, characterized in that: A driving gear (13) is arranged on the rotating shaft (12), a sliding guide seat (14) is arranged on the top of the horizontal slide (3), a pushing rack (15) is slidably connected to the sliding guide seat (14), a movable end of the first servo electric cylinder (16) is fixedly connected to the pushing rack (15), and the driving gear (13) is meshed with the pushing rack (15).

8. The hot press machine for rapid prototyping of brake pads according to claim 3, characterized in that: A plurality of limit slide bars (9) are arranged on the top of the horizontal slide table (3), and a plurality of positioning holes (18) are opened on the pressure plate (6). The number of the positioning holes (18) is equal to and corresponds to the limit slide bars (9), and each limit slide bar (9) is slidably matched with the corresponding positioning hole (18).

9. The hot press machine for rapid prototyping of brake pads according to claim 3, characterized in that: The filling assembly (5) comprises a plurality of lifting legs (23), a lifting platform (4) is arranged on the top of the plurality of lifting legs (23), a first feeder (20) and a second feeder (21) are arranged on the top of the lifting platform (4), and a control panel (22) for controlling the first feeder (20) and the second feeder is arranged on the top of the lifting platform (4).

10. A hot press machine for rapid prototyping of brake pads according to claim 9, characterized in that: The bottom of the lifting platform (4) is provided with a plurality of feeding ports, each of which includes two filling nozzles (25), and the two filling nozzles (25) are respectively connected to the discharge ports of the first feeder (20) and the second feeder (21). A rotating sleeve (26) is rotatably connected to the outer wall of each of the filling nozzles (25), and each of the rotating sleeves (26) is sleeved with a connecting gear (28). A plurality of stirring rods (27) are arranged around the outer wall of the bottom of each of the rotating sleeves (26). The connecting rods on the two filling nozzles (25) in each feeding port are connected to the connecting rods (27). The gears (28) are all meshed with each other. A plurality of guide rods (24) are arranged at the bottom of the lifting platform (4). A driving rack (29) is slidably connected to each of the guide rods (24). The plurality of driving racks (29) are connected to each other via a connecting rod (31). The connecting gear (28) on one of the filling nozzles (25) in each feeding port is meshed with a driving rack (29). A second servo electric cylinder (30) is also arranged at the bottom of the lifting platform (4). The movable end of the second servo electric cylinder (30) is connected to the connecting rod (31).

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