New energy automobile brake pad hot press molding equipment and technology

Abstract

The invention relates to the technical field of automobile brake pad machining, in particular to new energy automobile brake pad hot press forming equipment and technology.The new energy automobile brake pad hot press forming equipment comprises a hot press forming equipment body arranged above a workbench, a discharging opening and a containing groove are formed in the workbench, and a lower die located above the containing groove is slidably arranged on the upper surface of the workbench; an upper die is arranged above the lower die, and a die cavity communicated with the outside is formed in the lower die. According to the new energy automobile brake pad hot press molding equipment and process, through physical pushing and airflow stripping, it is ensured that a brake pad of a complex structure is completely demolded, demolding and discharging can be completed without manual intervention, the efficiency is remarkably improved, efficient energy utilization is achieved, an additional power source is not needed, and energy consumption is reduced; meanwhile, high-speed airflow is generated by a Venturi effect pressurizing pipe in the material ejecting mechanism, the inner wall of a mold cavity is blown through air outlet holes in the side face of an ejecting block, residual brake pad powder or adhesion points are stripped, and thorough demolding is ensured.

Description

Technical Field

[0001] The present application relates to the field of automobile brake pad processing technology, and in particular to a new energy vehicle brake pad hot pressing forming device and process. Background Art

[0002] There are many components of a car, and brake pads are one of them. If a car is missing brake pads, then the car is not allowed to go on the road. Without brake pads, the car cannot brake, which is extremely dangerous for the owner, passers-by, and other cars on the road. A car accident may happen at any time. Therefore, brake pads are an indispensable part of a car. The existing brake pad production is to manually put the materials required for the brake pads together with the help of equipment and then stamp them into shape. After searching, the patent document with announcement number CN113320215B discloses a brake pad extrusion molding device for new energy vehicles. The technical problem to be solved is to provide a brake pad extrusion molding device for new energy vehicles that can independently stamp brake pads, save time and improve work efficiency. The technical solution is as follows: a brake pad extrusion molding device for new energy vehicles includes a base plate and feet, with 6 feet on one side of the base plate; a bearing device, with a bearing device provided between one side of the feet; and an extrusion mechanism, with an extrusion mechanism provided on one side of the bearing device. This application uses the coordination of a feeding device and a recycling device to allow the excess material during feeding to be recycled.

[0003] With respect to the above-mentioned related technologies, the inventors found that there are at least the following problems in the technology. This application has the problem of inconvenience in cleaning the residual material in the lower mold cavity. Since the brake pad friction material contains resin, fiber and metal powder, it is easy to adhere to the groove or side wall of the lower mold cavity after stamping. If the mold cavity is not cleaned in time, it will not only destroy the material ratio, but also the residual material will occupy the cavity space, resulting in product thickness deviation and affecting product quality. Therefore, a new energy vehicle brake pad hot pressing forming equipment and process are proposed to solve the above-mentioned problems. Summary of the Invention

[0004] In response to the shortcomings of the existing technology and in order to avoid the impact of residual materials on the mold, this application provides a new energy vehicle brake pad hot pressing molding equipment and process, which has the advantages of physical pushing and airflow stripping to ensure the complete demolding of the brake pad, and solves the problem of inconvenience in cleaning the inside of the mold cavity after the lower mold is demolded.

[0005] This application provides a new energy vehicle brake pad hot pressing forming equipment and process, which adopts the following technical solutions: The utility model provides a new energy automobile brake pad hot press forming equipment, including setting up the hot press forming equipment body in the work table top, the work table inside is seted down material mouth and contains the groove, the upper surface of work table is located above containing the groove and is slidly arranged with the lower mould, the upper surface of work table is provided with the upper die above the lower mould, the lower mould is internally provided with the cavity that communicates with outside, the upper surface of work table one side is installed with the telescopic electric cylinder no. The upper surface of the workbench is provided with a driving assembly and a material pushing mechanism, the driving assembly drives the displacement of the lower mold through the telescopic electric cylinder no. The material pushing mechanism includes a second barrel and a third barrel, the second barrel is internally provided with a second piston, the top side of the second piston is fixed with a telescopic rod, the bottom end of the telescopic rod is fixed with a top block, the sidewall of the second barrel is fixed with a booster pipe, and the booster pipe and the top block are provided with a gas delivery pipe. The third barrel is fixed on the sidewall of the second barrel, the third barrel is internally provided with a third piston, the top side of the third piston is fixed with a connecting rod, and the bottom end of the connecting rod is fixed with a connecting arm connected with the outer surface of the telescopic rod, the outer wall of the third barrel is provided with a gas extraction pipe at the top end of the telescopic rod, and the telescopic rod is internally provided with a second gas delivery channel communicated with the gas extraction pipe.

[0006] Optionally, the back of the workbench is welded with a mounting bracket, the top side of the mounting bracket is bolted with a hydraulic device fixed with the upper die, and the lower surface of the upper die is fixed with a guide rod tightly matched with the lower die.

[0007] The beneficial effects of the above optional scheme are that the guide rod fixed on the lower surface of the upper die is tightly matched with the lower die, which can correct the slight deviation of the upper die when it is pressed down, and ensure that the upper die is aligned with the lower die.

[0008] Optionally, the lower surface of the workbench is fixed with a telescopic electric cylinder no.

[0009] The beneficial effects of the above optional scheme are that the sealing block is driven to move up by the telescopic electric cylinder no.

[0010] Optionally, the driving assembly is arranged on the top side of the workbench and close to the left side of the discharging port, the driving assembly comprises a first cylinder fixed to the upper surface of the workbench, a first piston is slidably arranged in the first cylinder, one side of the first piston is fixed with a connecting rod extending to the outside of the first cylinder, and the other end of the connecting rod is fixed with a buffer block in contact with the outer wall of the lower mold.

[0011] The beneficial effect of the above optional scheme is that the lower mold displacement collides with the buffer block, converting linear mechanical energy into pneumatic energy, pushing the first piston to compress the gas at the moment of collision, and ensuring that the demolding action is strictly synchronized with the displacement of the lower mold.

[0012] Optionally, a buffer spring is mounted between the outer surface of the connecting rod and one side of the first cylinder, a check valve is mounted on the outer wall of the first cylinder, and the end of the check valve is mounted with a pumping pipe in communication with the second cylinder.

[0013] The beneficial effect of the above optional scheme is that the check valve ensures that the gas compressed by the first cylinder can only flow to the second cylinder through the pumping pipe, preventing the gas in the second cylinder from flowing back to the first cylinder, and using one-way flow design to ensure the stability of the required air pressure of the ejection mechanism, avoiding insufficient pressure in the second cylinder due to backflow of gas, weakening or failure of the ejection force of the ejection block.

[0014] Optionally, the booster pipe comprises a throat pipe and two expansion pipes, the two expansion pipes are symmetrical and fixed to the two ends of the throat pipe, and the other two ends of the two expansion pipes are fixed in communication with the second cylinder and the gas conveying pipe, respectively, and the ejection block is provided with a first gas conveying channel.

[0015] The beneficial effect of the above optional scheme is that through physical pushing and airflow stripping, the complete demolding of the brake pad with complex structure is ensured, and the compressed air is accelerated through the booster pipe, then precisely sprayed to the contact interface between the brake pad and the mold cavity through the gas outlet holes of the ejection block and the side wall, and at the same time, the high-speed airflow penetrates into the micro cracks, eliminating the residual adhesion of the material after hot pressing.

[0016] Optionally, a plurality of gas outlet holes are arranged on the side surface of the ejection block, the gas outlet holes are equidistantly distributed and in communication with the first gas conveying channel, a return spring is mounted between the bottom side of the second cylinder and the outer surface of the telescopic rod, and the air suction pipe is composed of a hard pipe and a soft pipe.

[0017] The beneficial effect of the above optional scheme is that the third piston is driven to move downward by the connecting arm, a negative pressure is formed in the third cylinder, and the negative pressure is transmitted to the ejection block area through the air suction pipe and the internal channel of the telescopic rod, so that the brake pad steel back of the pre-embedded mold cavity is directly acted on by the negative pressure, and the brake pad steel back is firmly adsorbed on the surface of the ejection block, while the brake pad body is ejected and separated, thereby eliminating the subsequent manual separation process and solving the problem of micro adhesion between the steel back and the friction material due to solidification.

[0018] Optional: The shielding structure includes a rotating shaft whose bearing is installed inside the workbench and extends into the inside of the discharge port, a shielding plate is fixed on the outer surface of the rotating shaft, a linkage rod is provided above the rotating shaft and extends into the inside of the first plug cylinder and is fixed to the side wall of the first piston, a transmission part is provided between the linkage rod and the rotating shaft, and a limit block is installed on the inner side of the discharge port to limit the shielding plate.

[0019] The beneficial effect of adopting the above optional scheme is that the opening and closing power of the baffle comes from the air pressure change of the first plug cylinder, and the same power source is reused as the air pressure drive system of the ejection mechanism, without the need for an additional drive device, simplifying the equipment structure and reducing energy consumption.

[0020] Optional: The transmission member includes a gear fixed to the end of the rotating shaft, the outside of the gear is meshed with a rack, a connecting rod is fixed on the outer wall of the rack, a guide wheel is rotatably installed on the end of the connecting rod, a slide is fixed on the outer surface of the linkage rod, a guide groove is provided inside the slide for rolling cooperation with the guide wheel, and a limit platform for limiting the connecting rod is installed on the side wall of the workbench.

[0021] The beneficial effect of adopting the above optional solution is: by rolling the guide wheel at the end of the connecting rod in the guide groove of the skateboard, sliding friction is converted into rolling friction, ensuring that the transmission process is smooth and jitter-free, avoiding rack offset due to uneven friction resistance, and further improving transmission accuracy.

[0022] Another problem that needs to be solved by the present invention is to provide a hot pressing forming process for a new energy vehicle brake pad, comprising the following steps: S1. Raw material preparation and weighing: S1-1. Accurately weigh various raw materials according to the formula, including: binder, reinforcing fiber, friction performance modifier and other additives; S2. Moulding: Place the preform or directly weighed loose premix into the lower mold cavity of the preheated hot pressing mold; S3. Close the upper mold: After heating and exhausting, the hot press is started, and the mold is quickly heated to the set molding temperature through the built-in thermal oil channel or electric heating plate; S4, pressurization and curing: When the mold temperature reaches the set value, high pressure is applied and pressure-maintained curing is carried out at the set temperature, pressure, and time. The high temperature causes the thermosetting resin to melt, flow, and infiltrate all fillers and fibers. The high pressure densifies the material, expels residual gas, and ensures that the material completely fills the mold cavity. S5, pressure-maintaining cooling, after the solidification stage: S5-1, pressure-maintaining cooling, maintain the pressure or reduce the pressure to a certain level, and forcefully cool the mold with cooling water or air. Wait until the product temperature drops to the safe demoulding temperature before releasing the pressure and opening the mold to prevent the product from rebounding, deforming, or generating internal stress due to pressure release at high temperatures; S5-2, cooling after pressure relief, directly relieve pressure and open the mold after curing is completed, take out the high-temperature brake pads and place them in a special cooling device or cooling station for slow cooling; S6, demoulding: The mold is opened, and the molded brake pad is ejected from the mold using the ejection mechanism to remove the brake pad; S7. Heat treatment: After demoulding, the brake pads usually need further heat treatment in an oven; S8, heat treatment and machining: Including grinding to ensure thickness and parallelism, grooving, chamfering and drilling to achieve precise final size and surface requirements; S9, spraying and printing: Carry out rust-proof treatment, spray marking or friction coefficient marking; S10, Quality Inspection: Conduct appearance inspection, dimensional inspection, hardness, density, shear strength, compression strength, and friction performance tests.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The present invention ensures the complete demoulding of complex brake pads through physical pushing and airflow stripping. When the lower mold is displaced, the mechanical energy of the collision drive component is converted into air pressure energy, which compresses the gas in the first plug cylinder and synchronously triggers the adsorption and separation actions of the ejection mechanism and the shielding structure. Demolding and unloading can be completed without human intervention, which not only significantly improves efficiency but also achieves efficient energy utilization, does not require an additional power source, and reduces energy consumption. At the same time, the Venturi effect booster pipe in the ejection mechanism generates high-speed airflow, which blows the inner wall of the mold cavity through the air outlet on the side of the ejector block to strip off residual brake pad powder or adhesion points, ensuring complete demoulding.

[0024] 2. The present invention realizes the separation of the steel back and the product by opening and closing the shielding structure and coordinating the adsorption of the ejecting mechanism. When the ejecting mechanism moves downward, the shielding structure is in an open state. At this time, the steel back and the product are pushed to be discharged by the ejecting block in the ejecting mechanism. During the downward movement of the ejecting block, the third plug is used to realize the adsorption action to adsorb the steel back and realize the material separation effect. When the ejecting mechanism moves upward, the shielding structure is closed and the adsorption force of the ejecting mechanism disappears. At this time, the steel back falls into the discharge port and is caught by a shielding plate for subsequent picking up by subsequent staff, eliminating the subsequent manual separation process. It not only realizes the advantage of automatic separation of the steel back and the product, but also solves the problem of micro-bonding between the steel back and the friction material caused by solidification.

[0025] 3. The present invention converts sliding friction into rolling friction by allowing the guide wheel at the end of the connecting rod to roll in the guide groove of the skateboard, ensuring a smooth and jitter-free transmission process, avoiding rack offset caused by uneven friction resistance, and further improving transmission accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the structure of this application; Figure 2 It is a structural diagram of the hot pressing forming equipment body of the present application; Figure 3 It is a schematic diagram of the structure of the driver component of this application; Figure 4 It is a structural diagram of the ejection mechanism of this application; Figure 5 It is a structural diagram of the booster pipe of this application; Figure 6 It is a structural diagram of the shielding structure of this application; Figure 7 It is a structural diagram of the shielding plate of the present application; Figure 8 This application Figure 6 Schematic diagram of the enlarged structure of A shown.

[0027] Description of reference numerals: 1. Workbench; 11. Feeding port; 12. Receiving slot; 13. Stopper; 2. Hot pressing equipment body; 21. Lower die; 210. Cavity; 22. Upper die; 23. Mounting frame; 24. Hydraulic equipment; 25. Telescopic cylinder 1; 26. Telescopic cylinder 2; 27. Sealing block; 3. Drive assembly; 31. First plug; 32. First piston; 33. Connecting rod; 34. Buffer block; 35. Buffer spring; 36. Inflating tube; 4. Ejecting mechanism; 41. Second plug; 42. Second piston; 43. Telescopic rod; 44. Top block; 45. Booster pipe; 451. Throat pipe; 452. Expansion pipe; 46. Air pipe; 47. First air supply channel; 48. Air outlet; 49. Third plug cylinder; 410. Third piston; 411. Connecting rod; 412. Connecting arm; 413. Exhaust pipe; 414. Second air supply channel; 416. Return spring; 5. Shielding structure; 51. Rotating shaft; 52. Shielding plate; 53. Linking rod; 54. Gear; 55. Rack; 56. Slide plate; 57. Connecting rod; 58. Guide wheel; 59. Guide groove; 510. Limiting platform. DETAILED DESCRIPTION

[0028] The following is combined with Figures 1-8 This application is described in further detail.

[0029] The present application discloses a new energy vehicle brake pad hot pressing forming equipment and process. Figures 1-8 A hot pressing and forming device for brake pads of new energy vehicles comprises a hot pressing and forming device body 2 arranged above a workbench 1, a material discharge port 11 and a receiving groove 12 are provided inside the workbench 1, a lower die 21 located above the receiving groove 12 is slidingly provided on the upper surface of the workbench 1, an upper die 22 is provided above the lower die 21, a die cavity 210 connected to the outside is provided inside the lower die 21, and a telescopic electric cylinder 25 connected to the lower die 21 is installed on one side of the upper surface of the workbench 1; specifically, a mounting frame 23 is welded to the back of the workbench 1, a hydraulic device 24 fixed to the upper die 22 is bolted to the top side of the mounting frame 23, and a guide rod tightly fitted with the lower die 21 is fixed to the lower surface of the upper die 22. Among them, the guide rod fixed on the lower surface of the upper die 22 fits tightly with the lower die 21, which can correct the slight offset of the upper die 22 when the upper die 22 is pressed down, and ensure that the upper die 22 is aligned with the lower die 21. It should be noted that a guide rail for guiding the lower die 21 is provided on the upper surface of the workbench 1. A heating module is installed in the lower mold 21 .

[0030] In order to achieve the sealing of the lower mold 21, a telescopic electric cylinder 26 extending into the interior of the accommodating groove 12 is fixed to the lower surface of the workbench 1. A sealing block 27 is installed on the output end of the telescopic electric cylinder 26. The sealing block 27 is moved upward by the telescopic electric cylinder 26 to seal the bottom side of the mold cavity 210. Specifically, the sealing block 27 is driven upward by the telescopic electric cylinder 26 to form a tight fit with the bottom of the mold cavity 210, effectively sealing the mold cavity 210 and preventing the raw materials from overflowing from the bottom during the hot pressing process. It should be noted that the sealing block 27 is made of polytetrafluoroethylene PTFE or metal-based composite materials, which can withstand the high temperature environment of 150-200°C during hot pressing. The telescopic electric cylinder 26 pushes the sealing block 27 to close the bottom of the mold cavity 210, forming a heat-insulating base to reduce heat loss from the lower mold 21.

[0031] To facilitate unloading, the upper surface of the workbench 1 is mounted with a drive assembly 3 and a ejection mechanism 4. Drive assembly 3 drives the lower mold 21 via a telescopic electric cylinder 1 25. The drive assembly 3 and ejection mechanism 4 operate in tandem, positioned above the unloading port 11. A guide plate can also be installed on the underside of the port. Specifically, the drive of telescopic electric cylinder 26 is linked to the mold closing action of the hydraulic device 24. When the upper mold 22 and the lower mold 21 are closed, the sealing block 27 automatically moves upward to seal the mold cavity 210. After hot pressing is complete, the sealing block 27 moves downward to release the bottom of the mold cavity 210, synchronously with the ejection action of the ejection mechanism 4, eliminating the need for manual operation. Specifically, the driving assembly 3 is arranged on the top side of the workbench 1 and close to the left side of the discharge port 11. The driving assembly 3 includes a first plug cylinder 31 fixed to the upper surface of the workbench 1. A first piston 32 is slidably arranged inside the first plug cylinder 31. A connecting rod 33 extending to the outside of the first plug cylinder 31 is fixed on one side of the first piston 32, and a buffer block 34 in contact with the outer wall of the lower mold 21 is fixed on the other end of the connecting rod 33.

[0032] The ejection mechanism 4 includes a second plug cylinder 41 and a third plug cylinder 49. A second piston 42 is disposed within the second plug cylinder 41. A telescopic rod 43 is fixed to the top side of the second piston 42. A ejection block 44 is fixed to the bottom end of the telescopic rod 43. A booster tube 45 is fixed to the side wall of the second plug cylinder 41, and an air supply tube 46 is installed between the booster tube 45 and the ejection block 44. When the lower mold 21 displaces and collides with the buffer block 34, linear mechanical energy is converted into pneumatic energy. At the moment of collision, the first piston 32 is pushed to compress the gas, ensuring that the demoulding action is strictly synchronized with the displacement of the lower mold 21. Among them, a buffer spring 35 is installed between the outer surface of the connecting rod 33 and one side of the first plug cylinder 31. The buffer spring 35 not only effectively suppresses the vibration and noise generated by the collision of the lower mold 21, but also improves the workshop working environment and reduces the impact of vibration on the accuracy of the equipment. A check valve is installed on the outer wall of the first plug cylinder 31, and an air pump 36 connected to the second plug cylinder 41 is installed at the end of the check valve. The check valve ensures that the compressed gas in the first plug cylinder 31 can only flow to the second plug cylinder 41 through the air pump 36, preventing the gas in the second plug cylinder 41 from flowing back to the first plug cylinder 31. The one-way flow design ensures the stability of the air pressure required by the ejection mechanism 4, avoiding insufficient pressure in the second plug cylinder 41 due to gas backflow, and preventing the ejection force of the ejection block 44 from being weakened or failing.

[0033] In addition, the rapid reset capability of the buffer spring 35 ensures that the first piston 32 can quickly return to its position after the ejection mechanism 4 completes its action, preparing for the next collision of the lower mold 21 to trigger the ejection action, thereby realizing the "collision, compression, ejection and reset" work.

[0034] To further improve the blanking effect, the booster pipe 45 includes a throat pipe 451 and two expansion pipes 452, the two expansion pipes 452 are symmetrical and fixed at both ends of the throat pipe 451, and the other two ends of the two expansion pipes 452 are fixed in communication with the second plug barrel 41 and the gas conveying pipe 46 respectively, and the first gas conveying passage 47 is formed in the inside of the top block 44.

[0035] Wherein, the side surface of the top block 44 is provided with a plurality of air outlet holes 48 which are equidistantly distributed and in communication with the first gas conveying passage 47, and the bottom side of the second plug barrel 41 and the outer surface of the telescopic rod 43 are provided with a reset spring 416, specifically, through physical pushing and airflow stripping, it is ensured that the complex structure brake pad is completely demolded, compressed air is accelerated through the booster pipe 45, and then precisely sprayed to the contact interface between the brake pad and the mold cavity 210 through the top block 44 and the side wall air outlet hole 48, and at the same time, the high-speed airflow penetrates into the micro gap to eliminate the residual adhesion after the material is hot pressed. In addition, the plurality of equidistantly distributed air outlet holes 48 are in communication with the first gas conveying passage 47 to form a uniform airflow spraying channel. For the complex structure brake pad with grooves, holes or special textures, this way can ensure that the high-speed airflow penetrates into the micro gap to eliminate the "blind area" of traditional single-point spraying.

[0036] It should be noted that the spray angle of the air outlet hole 48 can be designed to be 30-60° with the surface of the mold cavity 210, and the tangential component of the airflow is used to strip the adhesion, while avoiding the surface damage of the brake pad caused by direct blowing.

[0037] To realize the material separation effect, the third plug barrel 49 is fixed on the side wall of the second plug barrel 41, the third plug barrel 49 is slidably provided with a third piston 410 inside, the top side of the third piston 410 is fixed with a connecting rod 411, and the bottom end of the connecting rod 411 is fixed with a connecting arm 412 connected with the outer surface of the telescopic rod 43, and the outer wall of the third plug barrel 49 is provided with an air extraction pipe 413 at the top end of the telescopic rod 43, and the telescopic rod 43 is provided with a second gas conveying passage 414 in communication with the air extraction pipe 413. Wherein, the air extraction pipe 413 is composed of a hard pipe and a soft pipe. The third piston 410 is driven to move downward by the connecting arm 412, a negative pressure is formed in the third plug barrel 49, and is transmitted to the top block 44 area through the air extraction pipe 413 and the second gas conveying passage 414 in the telescopic rod 43. The negative pressure directly acts on the brake pad steel back of the pre-embedded mold cavity 210, so that it is firmly adsorbed on the surface of the top block 44, and the brake pad body is pushed out and separated, thereby saving the subsequent manual separation process, and solving the problem of micro adhesion between the steel back and the friction material due to solidification. In addition, by adjusting the piston stroke of the third plug barrel 49 or the air pressure of the second plug barrel 41, the adsorption force can be accurately controlled, and the steel back of different weight or material can be adapted, so as to realize the advantage of wide compatibility.

[0038] In order to further improve the separation effect, the blanking opening 11 is provided with a shielding structure 5 matched with the driving assembly 3, the shielding structure 5 comprises a rotating shaft 51 mounted in the workbench 1 and extending into the blanking opening 11, the outer surface of the rotating shaft 51 is fixed with a shielding plate 52, the upper portion of the rotating shaft 51 is provided with a linkage rod 53 extending into the first plug cylinder 31 and fixed with the side wall of the first piston 32, a transmission member is arranged between the linkage rod 53 and the rotating shaft 51, the inner side of the blanking opening 11 is provided with a limiting block 13 limiting the shielding plate 52, through the installation of the limiting block 13, the shielding plate 52 can be limited and matched with the blanking opening 11, in addition, the rotating shaft 51 is located on one side of the shielding plate 52, when the shielding plate 52 is turned up, the shielding plate 52 abuts against the inner side of the blanking opening 11, at this time, the shielding plate 52 is perpendicular to the blanking opening 11, and the shielding plate 52 will not affect the blanking of the ejection mechanism 4 after being turned up.

[0039] Specifically, the opening and closing power of the shielding plate 52 is derived from the gas pressure change of the first plug cylinder 31, and the same power source is reused with the gas pressure driving system of the ejection mechanism 4, without the need for additional driving devices, which simplifies the equipment structure and reduces energy consumption, and the automatic opening and closing of the shielding plate 52 avoids manual operation of the blanking opening 11, and the operator does not need to touch the high-temperature mold cavity 210 or move the parts, thereby reducing the risk of burns, cuts and other injuries.

[0040] In order to realize the linkage of the ejection and the shielding plate 52, the transmission member comprises a gear 54 fixed to the end of the rotating shaft 51, the outer portion of the gear 54 is engaged with a rack 55, the outer wall of the rack 55 is fixed with a connecting rod 57, the end of the connecting rod 57 is rotatably mounted with a guide wheel 58, the outer surface of the linkage rod 53 is fixed with a sliding plate 56, the inner portion of the sliding plate 56 is provided with a guide groove 59 rolling matched with the guide wheel 58, and the side wall of the workbench 1 is provided with a limiting table 510 limiting the connecting rod 57. The guide wheel 58 at the end of the connecting rod 57 rolls in the guide groove 59 of the sliding plate 56, which converts sliding friction into rolling friction, ensures smooth transmission without shaking, avoids the rack 55 from deviating due to uneven friction resistance, and further improves the transmission accuracy.

[0041] It should be noted that the power of the transmission member is completely derived from the gas pressure change of the first plug cylinder 31, and the same power source is reused with the ejection mechanism 4, without the need for separately setting a motor, a gas cylinder or a hydraulic device, which simplifies the equipment structure and reduces the failure rate. The guide wheel 58 is made of polytetrafluoroethylene PTFE or bronze-based self-lubricating material, and the surface of the guide groove 59 is plated with hard chromium or treated with nitriding, so that additional lubrication is not needed during transmission, the mold cavity 210 is prevented from being polluted by lubricating oil or brake pad raw materials, and the maintenance frequency is reduced.

[0042] Another problem to be solved by the present application is to provide a new energy automobile brake pad hot press forming process, comprising the following steps: S1, raw material preparation and weighing: S1-1, accurately weigh various raw materials according to the formula, including: binder, reinforcing fiber, friction performance modifier and other additives; S1-2, preforming: Put the weighed premix into the preforming mold, and perform preliminary pressing at room temperature or lower temperature and lower pressure to form a "forming blank" or "pre-pressed block" with certain shape and strength, which can improve production efficiency, reduce the loading time of the main press, facilitate accurate control of the final product weight, improve the filling and distribution uniformity of the material in the mold, and reduce the exhaust volume during the main pressing stage; S2, mold loading: Put the preformed blank or directly weighed loose premix into the lower mold cavity 210 of the preheated hot press forming mold. For brake pads with back plates, the steel back is usually pre-placed in the mold, and the premix is placed under the steel back; S3, close the upper mold: Heating and venting, start the hot press, the mold is quickly heated to the set forming temperature through the built-in heat conduction oil channel or electric heating plate, usually in the range of 140°C-180°C, depending on the resin system and formula. During the initial heating or initial low pressure application, the mold is usually opened briefly or provided with a venting groove to allow air, moisture and low molecular volatile substances generated by resin curing in the material to escape. This step is crucial for preventing internal bubbles, delamination and ensuring uniform density in the product; S4, pressurization and curing, when the mold temperature reaches the set value, high pressure is applied, and pressure curing is performed at the set temperature, pressure and time; high temperature melts and flows the thermosetting resin and infiltrates all fillers and fibers; high pressure densifies the material, expels residual gas, and ensures that the material completely fills the mold cavity; under high temperature and high pressure, the resin undergoes crosslinking and curing reaction to form a three-dimensional network structure, firmly bonding various components into a whole; the curing time must be long enough to ensure that the resin is fully cured and reaches the best performance; S5, pressure holding and cooling, after the curing stage is completed: S5-1, pressure holding and cooling, maintain the pressure or reduce the pressure by a certain amount, and at the same time, forcibly cool the mold through cooling water or air, and then release the pressure and open the mold when the product temperature drops to a safe demolding temperature, to prevent the product from rebounding, deforming or generating internal stress due to pressure release at high temperature; S5-2, cooling after pressure release, directly release the pressure and open the mold after the curing is completed, take out the high-temperature brake pad and place it in a special cooling device or cooling station for slow cooling, to stabilize the product size, reduce internal stress, prevent warping and deformation, and ensure the geometric accuracy and structural stability of the final product; S6, demolding: The mold is opened, and the formed brake pad is ejected from the mold using the ejector mechanism 4, and the brake pad is taken out; S7. Heat treatment: After demoulding, the brake pads usually need further heat treatment in an oven; S8, heat treatment and machining: Including grinding to ensure thickness and parallelism, grooving, chamfering, drilling, etc. to achieve precise final size and surface requirements; S9, spraying and printing: Carry out rust-proof treatment, spray marking or friction coefficient marking; S10, Quality Inspection: Conduct appearance inspection, dimensional inspection, hardness, density, shear strength, compression strength, and friction performance tests.

[0043] Combined with attachment Figures 1-8 The working principle of the above embodiment is as follows: Telescopic cylinder 1 25 drives lower die 21 to slide along the upper surface of workbench 1 to just below upper die 22. Hydraulic equipment 24 drives upper die 22 downward, tightly fitting it against lower die 21 to form a closed die cavity 210. At this point, telescopic cylinder 26 pushes sealing block 27 upward, sealing the bottom of die cavity 210 and providing a sealed environment for hot pressing. Die cavity 210 is then filled with brake pad material, and hot pressing is completed through heating and pressurization. After the hot pressing is completed, the upper mold 22 is lifted, and the telescopic electric cylinder 1 25 drives the lower mold 21 to move closer to the lower material port 11. After the lower mold 21 moves, its side wall collides with the buffer block 34 of the drive assembly 3, pushing the connecting rod 33 to drive the first piston 32 to compress in the first plug cylinder 31. The gas compressed by the first piston 32 enters the second plug cylinder 41 through the check valve and the air pumping pipe 36, pushing the second piston 42 downward. The second piston 42 drives the ejector block 44 downward through the telescopic rod 43, and pushes into the bottom of the mold cavity 210 to eject the molded brake pad. The compressed air in the second plug cylinder 41 enters the first air delivery channel 47 of the top block 44 through the booster pipe 45 and the air delivery pipe 46 of the Venturi effect. The high-speed airflow is ejected from the air outlet 48 on the side of the top block 44 and blows toward the contact surface between the brake pad and the wall of the mold cavity 210, thereby assisting in peeling off the adhered brake pad and achieving complete demoulding. In addition, when the telescopic rod 43 moves downward, the connecting arm 412 drives the connecting rod 411 to move downward. At this time, the third piston 410 moves downward inside the third plug cylinder 49 to generate a vacuum, and the steel back is adsorbed by the adsorption force of the second air supply channel 414 and the exhaust pipe 413, thereby realizing the separation of the product and the steel back.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A new energy vehicle brake pad hot pressing molding equipment, characterized by: The invention comprises a hot pressing forming equipment body (2) arranged above a workbench (1), wherein a material discharge port (11) and a receiving groove (12) are provided inside the workbench (1), a lower mold (21) located above the receiving groove (12) is slidably provided on the upper surface of the workbench (1), an upper mold (22) is provided above the lower mold (21), a mold cavity (210) communicating with the outside is provided inside the lower mold (21), and a telescopic electric cylinder (25) connected to the lower mold (21) is installed on one side of the upper surface of the workbench (1); A driving assembly (3) and a material ejecting mechanism (4) are installed on the upper surface of the workbench (1). The driving assembly (3) drives the displacement of the lower mold (21) by a telescopic electric cylinder (25). The driving assembly (3) and the material ejecting mechanism (4) are used in conjunction with each other. The material ejecting mechanism (4) is located above the material discharge port (11). A shielding structure (5) used in conjunction with the driving assembly (3) is installed in the material discharge port (11). The ejection mechanism (4) includes a second plug cylinder (41) and a third plug cylinder (49), a second piston (42) is provided inside the second plug cylinder (41), a telescopic rod (43) is fixed to the top side of the second piston (42), a ejection block (44) is fixed to the bottom end of the telescopic rod (43), a boosting pipe (45) is fixed to the side wall of the second plug cylinder (41), and an air supply pipe (46) is installed between the boosting pipe (45) and the ejection block (44); The third plug cylinder (49) is fixed on the side wall of the second plug cylinder (41), and a third piston (410) is slidably provided inside the third plug cylinder (49). A connecting rod (411) is fixed to the top side of the third piston (410), and a connecting arm (412) connected to the outer surface of the telescopic rod (43) is fixed to the bottom end of the connecting rod (411). An air extraction pipe (413) connected to the top end of the telescopic rod (43) is installed on the outer wall of the third plug cylinder (49), and a second air supply channel (414) connected to the air extraction pipe (413) is opened inside the telescopic rod (43).

2. The hot pressing forming equipment for brake pads for new energy vehicles according to claim 1, characterized in that: A mounting frame (23) is welded to the back of the workbench (1), a hydraulic device (24) fixed to the upper die (22) is fixed to the top side of the mounting frame (23) by bolts, and a guide rod tightly matched with the lower die (21) is fixed to the lower surface of the upper die (22).

3. The hot pressing forming equipment for brake pads for new energy vehicles according to claim 1, characterized in that: A telescopic electric cylinder 2 (26) extending into the interior of the accommodating groove (12) is fixed to the lower surface of the workbench (1), and a sealing block (27) is installed on the output end of the telescopic electric cylinder 2 (26). The sealing block (27) seals the bottom side of the mold cavity (210) when the telescopic electric cylinder 2 (26) moves upward.

4. The hot pressing forming equipment for brake pads for new energy vehicles according to claim 1, characterized in that: The driving assembly (3) is arranged on the top side of the workbench (1) and close to the left side of the discharge port (11), and the driving assembly (3) includes a first plug cylinder (31) fixed to the upper surface of the workbench (1), a first piston (32) is slidably arranged inside the first plug cylinder (31), a connecting rod (33) extending to the outside of the first plug cylinder (31) is fixed on one side of the first piston (32), and a buffer block (34) in contact with the outer wall of the lower mold (21) is fixed on the other end of the connecting rod (33).

5. The hot pressing forming equipment for brake pads for new energy vehicles according to claim 4, characterized in that: A buffer spring (35) is installed between the outer surface of the connecting rod (33) and one side of the first plug cylinder (31). A check valve is installed on the outer wall of the first plug cylinder (31), and an air pump (36) connected to the second plug cylinder (41) is installed at the end of the check valve.

6. The hot pressing forming equipment for brake pads for new energy vehicles according to claim 1, characterized in that: The boost pipe (45) includes a throat pipe (451) and two expansion pipes (452). The two expansion pipes (452) are symmetrical and fixed at both ends of the throat pipe (451). The other two ends of the two expansion pipes (452) are fixedly connected to the second plug cylinder (41) and the air supply pipe (46), respectively. A first air supply channel (47) is opened inside the top block (44).

7. The hot pressing forming equipment for brake pads for new energy vehicles according to claim 6, characterized in that: The side of the top block (44) is provided with a plurality of air outlet holes (48) which are equidistantly distributed and connected to the first air delivery channel (47). A return spring (416) is installed between the bottom side of the second plug cylinder (41) and the outer surface of the telescopic rod (43). The air extraction pipe (413) is composed of a hard pipe and a soft pipe.

8. The hot pressing forming equipment for brake pads for new energy vehicles according to claim 4, characterized in that: The shielding structure (5) includes a rotating shaft (51) whose bearing is installed inside the workbench (1) and extends into the inside of the discharge port (11); a shielding plate (52) is fixed to the outer surface of the rotating shaft (51); a linkage rod (53) is provided above the rotating shaft (51) and extends into the inside of the first plug cylinder (31) and is fixed to the side wall of the first piston (32); a transmission member is provided between the linkage rod (53) and the rotating shaft (51); and a limiting block (13) is installed on the inner side of the discharge port (11) for limiting the shielding plate (52).

9. The new energy vehicle brake pad hot pressing forming equipment according to claim 8, characterized in that: The transmission member includes a gear (54) fixed to the end of the rotating shaft (51), the gear (54) is meshed with a rack (55) on the outside, a connecting rod (57) is fixed on the outer wall of the rack (55), a guide wheel (58) is rotatably mounted on the end of the connecting rod (57), a slide (56) is fixed to the outer surface of the linkage rod (53), a guide groove (59) is provided inside the slide (56) for rolling engagement with the guide wheel (58), and a limiting platform (510) for limiting the position of the connecting rod (57) is installed on the side wall of the workbench (1).

10. A hot pressing forming process for a new energy vehicle brake pad, using the hot pressing forming equipment for a new energy vehicle brake pad according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Raw material preparation and weighing: S1-1. Accurately weigh various raw materials according to the formula, including: binder, reinforcing fiber, friction performance modifier and other additives; S2. Moulding: Place the preform or directly weighed loose premix into the lower mold cavity of the preheated hot pressing mold; S3. Close the upper mold: After heating and exhausting, the hot press is started, and the mold is quickly heated to the set molding temperature through the built-in thermal oil channel or electric heating plate; S4, pressurization and curing: When the mold temperature reaches the set value, high pressure is applied and pressure-maintained curing is carried out at the set temperature, pressure, and time. The high temperature causes the thermosetting resin to melt, flow, and infiltrate all fillers and fibers. The high pressure densifies the material, expels residual gas, and ensures that the material completely fills the mold cavity. S5, pressure-maintaining cooling, after the solidification stage: S5-1, pressure-maintaining cooling, maintain the pressure or reduce the pressure to a certain level, and forcefully cool the mold with cooling water or air. Wait until the product temperature drops to the safe demoulding temperature before releasing the pressure and opening the mold to prevent the product from rebounding, deforming, or generating internal stress due to pressure release at high temperatures; S5-2, cooling after pressure relief, directly relieve pressure and open the mold after curing is completed, take out the high-temperature brake pads and place them in a special cooling device or cooling station for slow cooling; S6, demoulding: The mold is opened, and the molded brake pad is ejected from the mold using the ejection mechanism (4) to remove the brake pad; S7. Heat treatment: After demoulding, the brake pads usually need further heat treatment in an oven; S8, heat treatment and machining: Including grinding to ensure thickness and parallelism, grooving, chamfering and drilling to achieve precise final size and surface requirements; S9, spraying and printing: Carry out rust-proof treatment, spray marking or friction coefficient marking; S10, Quality Inspection: Conduct appearance inspection, dimensional inspection, hardness, density, shear strength, compression strength, and friction performance tests.

Images