Blank mixing and forming device for metal-based composite material

Abstract

The invention discloses a blank mixing and forming device for a metal matrix composite. The blank mixing and forming device comprises a mixing bin, a forming mechanism and a negative pressure mechanism. The mixing bin is internally provided with a rotating mechanism, the rotating mechanism is rotatably mounted in the flow dividing mechanism, the surface of the flow dividing mechanism is connected with a heat source pipe, the surface of the mixing bin is provided with a forming mechanism, and the forming mechanism comprises a partition plate, a first gate plate, a second gate plate, an extrusion mechanism, a pushing mechanism and a buckle; a plurality of buckles are arranged on the surface of the end, close to the extruding mechanism, of the pushing mechanism, and a plurality of clamping grooves are formed in the surface of the second gate plate. According to the method, a high-temperature mixing mode is adopted, copper-based powder is softened, so that the copper-based powder is deformed more easily, the softened copper powder can be in comprehensive contact with graphene powder in cooperation with pressure applied by extrusion forming, gaps between mixed materials are reduced, and a more compact blank can be obtained in cooperation with negative-pressure air exhaust; and the performance of the copper-based composite material is improved.

Description

Technical Field

[0001] The invention relates to a composite material manufacturing technology, in particular to a blank mixing molding device for metal-based composite materials. Background Art

[0002] Metal matrix composites are usually prepared by in-situ synthesis. The basic principle is to generate one or more ceramic phase particles in the metal matrix through chemical reactions of compounds under certain conditions, so as to improve the performance of a single metal. The in-situ synthesis process can be divided into solid-liquid reaction composite and solid-solid reaction composite. Among them, solid-solid reaction composite is further divided into self-propagating high temperature synthesis method, XDIM method, contact reaction method, mixed salt reaction method and mechanical alloying method.

[0003] The XDIM method (Exothermical Dispersion Technique), also known as the exothermic dispersion method, is to uniformly mix the component powders of the composite material with the metal matrix, and then quickly heat the pressed green sheet to a temperature above the melting point of the metal matrix after compaction and degassing to generate dispersed particles smaller than 1nm and evenly distributed. The reaction elements diffuse and contact with each other, continuously react and precipitate a stable reinforcement phase, which is then cast and extruded to be made into composite workpieces of different forms.

[0004] Copper-based composite materials are composite materials made of copper as the metal matrix and other metal or non-metal materials. Copper-based composite materials have the advantages of good thermal conductivity, good mechanical properties, good corrosion resistance and good wear resistance. Copper-based composite materials can have different properties depending on the mixed materials.

[0005] Graphene is an allotrope of carbon with excellent optical, electrical and mechanical properties and broad application prospects. Graphene is combined with copper-based materials to form copper-based composite materials, which can significantly improve the performance of copper-based materials and have better hardness, wear resistance and conductivity.

[0006] When preparing metal-based composite materials by exothermic dispersion method, the particle size of metal-based powder and mixed materials is related to the contact area between materials. Appropriate particle size and particle gradation are conducive to close contact between powders and filling of gaps, which is conducive to the subsequent heating reaction and mass transfer process. Therefore, it is necessary to finely grind the raw materials. However, the existing mixing and compacting processes are usually carried out at room temperature, and the compact density is low.

[0007] Secondly, the existing mixing and pressing processes require independent equipment to operate, that is, the mixed material after mixing needs to pass through a conveying mechanism, and the mixed material produced by the mixing equipment is transmitted to the pressing molding mechanism through the conveying mechanism, and the linkage between the processes is poor. If the material mixing mechanism is combined with the extrusion molding mechanism, the discharge port of the mixing mechanism is connected to the extrusion molding chamber. Although the transmission process can be saved and there is no need to transmit the mixed raw materials to the extrusion mechanism through the transmission mechanism, the mixing mechanism and the extrusion molding mechanism need to be equipped with an opening and closing device for the mixture transmission channel, which not only increases the number of equipment components, but also needs to be equipped with a corresponding control system to meet the needs of practical applications, which will increase the equipment manufacturing cost. And after the pressing molding, additional equipment is required to push the blank out for subsequent transmission, which has low mobility and flexibility, and also increases the equipment manufacturing cost. Summary of the invention

[0008] The object of the present invention is to provide a device for mixed forming of blanks of metal matrix composite materials to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solutions: a blank mixing and molding device for metal-based composite materials, comprising a mixing bin, a molding mechanism and a negative pressure mechanism;

[0010] A rotating mechanism is arranged inside the mixing bin, one end of the rotating mechanism passing through the mixing bin is connected to a driving mechanism, a flow diversion mechanism is arranged on the surface of the mixing bin, the rotating mechanism is rotatably installed inside the flow diversion mechanism, a nozzle is arranged on the end of the rotating mechanism away from the driving mechanism, a plurality of heat source pipes are connected to the flow diversion mechanism, and the plurality of heat source pipes are connected to the heating furnace, a plurality of feed pipes are arranged on the surface of the mixing bin, and a plurality of evenly distributed connecting grooves are opened on the surface of the rotating mechanism located inside the flow diversion mechanism;

[0011] A forming mechanism is arranged on the surface of the mixing bin, a negative pressure mechanism is arranged on the surface of the forming mechanism, the forming mechanism comprises a partition, a first gate plate, a second gate plate, an extrusion mechanism, a propulsion mechanism and a buckle, the extrusion mechanism is slidably installed inside the partition, one end of the propulsion mechanism is in contact with the surface of one end of the extrusion mechanism, a plurality of buckles are arranged on the surface of one end of the extrusion mechanism near the propulsion mechanism, guide rods are arranged on the surfaces of the plurality of buckles, a guide groove is arranged on the inner wall of the forming mechanism, a plurality of slots are opened on the surface of the second gate plate, and a plurality of teeth are arranged inside the slots.

[0012] Preferably, the interior of the rotating mechanism is hollow, the driving mechanism adopts an electric motor, and the driving mechanism is connected to the rotating mechanism that passes through the top of the mixing bin;

[0013] A plurality of stirring rods are arranged on the surface of the rotating mechanism, and the cross section of the stirring rods is V-shaped. A plurality of scrapers are arranged on the surface of one end of the rotating mechanism away from the driving mechanism.

[0014] Preferably, a plurality of diverter tubes are arranged on the surface of the diverter mechanism, and the diverter tubes are connected to the feed tubes.

[0015] Preferably, a discharge port is provided on the surface of the mixing bin close to one end of the forming mechanism.

[0016] Preferably, the partition plate, the first gate plate, the second gate plate and the inner wall of the forming mechanism form a forming bin, and the forming bin is located below the discharge port.

[0017] Preferably, the inner wall of the molding mechanism is provided with a slide groove adapted to the first gate plate and the second gate plate, and the surfaces of one end of the first gate plate and the second gate plate are provided with a second rebound mechanism, and the second rebound mechanism is composed of a limit rod and a spring, and one end of the second rebound mechanism is connected to the inner wall of the molding mechanism;

[0018] The cross section of the first gate plate is L-shaped, and the surface of the first gate plate fits the surface of the discharge port.

[0019] Preferably, one end of the extrusion mechanism facing away from the propulsion mechanism is located inside the molding chamber, a first rebound mechanism is provided between the propulsion mechanism and the partition, and the first rebound mechanism is composed of a spring.

[0020] Preferably, the buckle further includes a spring sheet, which is located inside the buckle and has a V-shaped cross section.

[0021] Preferably, a transmission mechanism is provided at the bottom end of the forming mechanism.

[0022] Preferably, the negative pressure mechanism comprises an air chamber, a mesh plate, a filter screen and an air pipe, the negative pressure mechanism is connected to the inside of the forming mechanism, and the air pipe is connected to the air extraction device;

[0023] The filter screen is flush with the inner wall of the forming bin, and the mesh plate is located between the gas bin and the filter screen.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention achieves the effect of increasing the temperature of copper-based powder by inputting high-temperature gas. The copper powder is heated by the high-temperature environment in the mixing bin to soften the copper powder, making it easier for the copper powder to deform in subsequent extrusion molding. The external force applied by the extrusion mechanism squeezes and deforms the copper powder, increasing the contact area between the copper powder and the graphene powder, thereby reducing the powder gap between the mixture and helping to improve the density of the blank.

[0026] 2. The present invention uses a propulsion mechanism to control the opening and closing of the first gate plate and the second gate plate, thereby achieving the effect of improving the overall maneuverability and flexibility of the molding mechanism and reducing the manufacturing cost of the equipment. The positions of the first gate plate and the second gate plate can be adjusted through the stroke position of the propulsion mechanism, so that the first gate plate and the second gate plate can be controlled to move without the need for additional propulsion equipment, thereby reducing the configuration of additional power mechanisms, which not only improves the maneuverability and flexibility, but also reduces the manufacturing cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the internal structure of the mixing bin in Example 1;

[0028] Figure 2 This is a schematic diagram of the appearance structure of the rotating structure in Example 1;

[0029] Figure 3 It is a schematic cross-sectional structural diagram of the diversion mechanism in the first embodiment;

[0030] Figure 4 It is a schematic diagram of the local structure of the rotating mechanism in the first embodiment;

[0031] Figure 5 It is a schematic diagram of the internal structure of the forming mechanism in the first embodiment;

[0032] Figure 6 It is a schematic diagram of the explosion structure of the forming mechanism in the first embodiment;

[0033] Figure 7 It is a schematic diagram of the cross-sectional explosion structure of the forming mechanism in the first embodiment;

[0034] Figure 8 It is a schematic diagram of the guide groove, buckle and slot position structure in the first embodiment;

[0035] Fig. 9 This is a schematic diagram of the appearance structure of the buckle in the first embodiment;

[0036] Fig.10 It is a schematic diagram of the explosion structure of the negative pressure mechanism in the first embodiment.

[0037] In the figure:

[0038] 100, mixing bin; 110, rotating mechanism; 111, scraper; 112, stirring rod; 113, nozzle; 114, connecting groove; 120, driving mechanism; 130, diverter mechanism; 131, diverter pipe; 132, heat source pipe; 140, feed pipe; 150, discharge port;

[0039] 200, forming mechanism; 201, partition; 202, forming chamber; 203, slide groove; 204, guide groove; 210, transmission mechanism; 220, first gate; 230, second gate; 231, clamping groove; 232, clamping teeth; 240, extrusion mechanism; 241, first rebound mechanism; 250, propulsion mechanism; 260, second rebound mechanism; 270, buckle; 271, guide rod; 272, spring sheet;

[0040] 300, negative pressure mechanism; 310, gas chamber; 320, mesh plate; 330, filter screen; 340, gas pipe. DETAILED DESCRIPTION

[0041] 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.

[0042] See also Figures 1 to 10 The present invention provides the following two embodiments: a device for mixing and molding a blank of a metal-based composite material, comprising a mixing bin 100, a molding mechanism 200 and a negative pressure mechanism 300.

[0043] Embodiment 1:

[0044] See also Figure 1 A rotating mechanism 110 is provided inside the mixing chamber 100 , and one end of the rotating mechanism 110 that passes through the mixing chamber 100 is connected to a driving mechanism 120 . A diversion mechanism 130 is provided on the surface of the mixing chamber 100 , and the rotating mechanism 110 is rotatably installed inside the diversion mechanism 130 .

[0045] See also Figures 1 to 4 The interior of the rotating mechanism 110 is hollow, and the driving mechanism 120 adopts an electric motor. A nozzle 113 is arranged at one end of the rotating mechanism 110 away from the driving mechanism 120, and a plurality of stirring rods 112 are arranged on the surface of the rotating mechanism 110, and the cross section of the stirring rod 112 is V-shaped. The cross section of the stirring rod 112 adopts a V-shaped design, the purpose of which is to increase the contact area between the stirring rod 112 and the material. When the powder raw material is input into the mixing bin 100, the rotating stirring rod 112 collides with the powder, and the surface of the V-shaped stirring rod 112 has a larger contact area, so that the powder raw material is more fully and evenly dispersed through the collision between the stirring rod 112 and the material. A plurality of scrapers 111 are arranged on the surface of one end of the rotating mechanism 110 away from the driving mechanism 120.

[0046] The driving mechanism 120 drives the rotating mechanism 110 to rotate, accelerating the raw materials injected into the mixing bin 100 to collide with the rotating stirring rod 112, and the raw materials can be evenly dispersed in the mixing bin 100, so that the raw materials are evenly dispersed, and the effect of evenly mixing two or more raw materials is achieved. When the raw materials are deposited at the bottom of the mixing bin 100, the hot air transported inside the rotating mechanism 110 can be sprayed out through the nozzle 113, and the hot air flow drives the raw material powder to turn over at the bottom of the mixing bin 100, and cooperates with the rotation of the scraper 111 to achieve full and even mixing of the raw materials.

[0047] See also Figures 1 to 3 The surface of the diverter mechanism 130 is connected with a heat source pipe 132, which is connected to the heating furnace. The high-temperature gas generated by the heating furnace is introduced into the heat source pipe 132 through a blower. A plurality of feed pipes 140 are arranged on the surface of the mixing chamber 100. A plurality of evenly distributed connecting grooves 114 are opened on the surface of the rotating mechanism 110 located inside the diverter mechanism 130. A plurality of diverter pipes 131 are arranged on the surface of the diverter mechanism 130, and the diverter pipes 131 are connected to the feed pipes 140. The copper-based powder and the graphene powder can be input into the mixing chamber 100 through the feed pipes 140, and the hot air output from the heating furnace is injected into the diverter mechanism 130 through the heat source pipe 132. The hot air inside the diverter mechanism 130 is injected into the feed pipe 140 through the diverter pipe 131, and the hot air passes through the connecting grooves 114. After being injected into the rotating mechanism 110 and the hot air is injected into the feed pipe 140, it can not only preheat the raw materials, but also increase the speed of the raw materials being injected into the mixing bin 100 through the feed pipe 140. The hot air increases the temperature in the mixing bin 100 and raises the space temperature in the mixing bin 100 to between 400-600°C. The copper powder absorbs the heat of the mixing bin 100, so that the temperature of the copper powder also increases. When the temperature of the copper powder rises to 400°C, the hardness and strength of the copper will be significantly reduced, that is, the copper begins to soften, and the copper can be deformed by external force. During the subsequent extrusion molding, the softened copper powder is squeezed by external force, and the contact between the copper powder and the graphene powder will be closer, thereby reducing the gap between the copper powder and the graphene powder, which is conducive to obtaining a denser billet.

[0048] See also Figure 4 A discharge port 150 is provided on the surface of the mixing bin 100 near one end of the molding mechanism 200 , and the raw materials after mixing can enter the molding bin 202 through the discharge port 150 .

[0049] See also Figure 5 The surface of the mixing bin 100 is provided with a forming mechanism 200. The bottom of the forming mechanism 200 is provided with a transmission mechanism 210.

[0050] See also Figures 5 to 7The forming mechanism 200 includes a partition 201, a first gate 220, a second gate 230, an extrusion mechanism 240, a propulsion mechanism 250 and a buckle 270. The partition 201 and the first gate 220, the second gate 230 and the inner wall of the forming mechanism 200 form a forming chamber 202, and the forming chamber 202 is located below the discharge port 150.

[0051] The inner wall of the forming mechanism 200 is provided with a slide groove 203 adapted to the first gate plate 220 and the second gate plate 230, and the surface of one end of the first gate plate 220 and the second gate plate 230 are provided with a second rebound mechanism 260, and the second rebound mechanism 260 is composed of a limit rod and a spring, and one end of the second rebound mechanism 260 is connected to the inner wall of the forming mechanism 200.

[0052] The cross section of the first gate plate 220 is L-shaped, and the surface of the first gate plate 220 is in contact with the surface of the discharge port 150. The end of the extrusion mechanism 240 that is away from the propulsion mechanism 250 is located inside the molding bin 202. A first rebound mechanism 241 is provided between the propulsion mechanism 250 and the partition plate 201, and the first rebound mechanism 241 is composed of a spring.

[0053] When the mixing is completed, the propulsion mechanism 250 moves to the side away from the molding bin 202, and the moving end of the propulsion mechanism 250 contacts the end face of the lower surface of the first gate plate 220, and drives the first gate plate 220 to move along the slide groove 203, so that the first gate plate 220 moves in the direction away from the molding bin 202, thereby connecting the discharge port 150 with the molding bin 202, and the mixed raw materials can fall into the molding bin 202.

[0054] The extrusion mechanism 240 is slidably installed inside the partition 201, and one end of the propulsion mechanism 250 is in contact with the surface of one end of the extrusion mechanism 240. When the raw material falls into the molding bin 202, the extrusion mechanism 240 is acted upon by the elastic force of the first rebound mechanism 241, and one end of the extrusion mechanism 240 located in the molding bin 202 is always in contact with the surface of the partition 201, thereby preventing the extrusion mechanism 240 from affecting the filling of the raw material in the molding bin 202.

[0055] See also Figure 8 The inner wall of the forming mechanism 200 is provided with a guide groove 204 , the surface of the second gate plate 230 is provided with a plurality of slots 231 , and the inside of the slots 231 is provided with a plurality of teeth 232 .

[0056] See also Fig. 9 A plurality of buckles 270 are disposed on the surface of one end of the pushing mechanism 250 close to the squeezing mechanism 240 , and a guide rod 271 is disposed on the surface of each of the plurality of buckles 270 .

[0057] The buckle 270 further includes a spring piece 272 . The spring piece 272 is located inside the buckle 270 , and the cross section of the spring piece 272 is V-shaped.

[0058] After the raw materials fill the molding bin 202, the pushing mechanism 250 pushes out toward the molding bin 202, and the first gate plate 220 is reset under the elastic action of the second rebound mechanism 260 to block the discharge port 150. When the ejection end of the pushing mechanism 250 contacts the extrusion mechanism 240, the pushing mechanism 250 moves together with the extrusion mechanism 240 toward the molding bin 202, and the extrusion mechanism 240 extrude the mixed powder in the molding bin 202 to form a mixed powder blank. When the ejection end of the pushing mechanism 250 contacts the extrusion mechanism 240, the buckle 270 on the surface of the pushing mechanism 250 moves along the slot 231 on the surface of the second gate plate 230. As the pushing mechanism 250 continues to be ejected, the buckle 270 moves between the teeth 232. The spring piece 272 maintains the engagement between the buckle 270 and the teeth 232 through elastic force. When the extrusion is completed, the pushing mechanism 250 retracts, and the buckle 270 moves following the reset stroke of the pushing mechanism 250. Through the engagement between the buckle 270 and the teeth 232, the second gate plate 230 is driven to move along the slide groove 203, thereby opening the space below the forming bin 202, and the extruded blank falls to the surface of the transmission mechanism 210, and the blank is output.

[0059] When the second gate plate 230 completes opening the space below the molding bin 202, and before the ejection end of the propulsion mechanism 250 contacts the lower end surface of the first gate plate 220, the guide rod 271 on the surface of the buckle 270 will follow the movement of the propulsion mechanism 250 and enter the guide groove 204. The end of the guide groove 204 is inclined, and the guide rod 271 can be lifted, thereby lifting the buckle 270 through the guide rod 271, so that the buckle 270 is disengaged from the tooth 232. The second gate plate 230 moves toward the molding bin 202 under the elastic reaction force of the second rebound mechanism 260, so as to close the opening below the molding bin 202, and achieve the effect of controlling the movement of the first gate plate 220 and the second gate plate 230 without the need for additional propulsion equipment, thereby reducing the configuration of additional power mechanisms, which not only improves maneuverability and flexibility, but also reduces the manufacturing cost of the equipment.

[0060] See also Fig.10 A negative pressure mechanism 300 is provided on the surface of the forming mechanism 200. The negative pressure mechanism 300 includes a gas chamber 310, a mesh plate 320, a filter screen 330 and an air pipe 340. The negative pressure mechanism 300 is connected to the inside of the forming mechanism 200, and the air pipe 340 is connected to an exhaust device. During the extrusion molding process, since the powder raw material is cooled, the gaps between the powder particles are reduced by external pressure to form a more compact billet. When the negative pressure mechanism 300 extrudes the billet, the air in the forming chamber 202 is extracted through the exhaust device to reduce the air pressure inside the forming chamber 202, thereby helping the gas inside the billet to be quickly discharged and forming a more compact billet.

[0061] The filter screen 330 is flush with the inner wall of the molding chamber 202, and the mesh plate 320 is located between the gas chamber 310 and the filter screen 330. The mesh plate 320 has evenly distributed holes on its surface. The mesh plate 320 is used to support the filter screen 330 and maintain airflow. The filter screen 330 is used to isolate the raw material powder to prevent leakage of the raw material powder. In practical applications, the mesh diameter of the filter screen 330 is selected between 10-20 nm.

[0062] Embodiment 2:

[0063] When the output temperature of the heating furnace is 800-1100°C, the output hot air raises the temperature in the mixing chamber 100 to between 800-1000°C, and the copper powder absorbs the heat of the mixing chamber 100, causing the temperature of the copper powder to also rise. When the temperature of the copper powder rises to 800-1050°C, the softening degree of the copper powder is further improved. When the temperature of the copper powder rises to 1020°C, the softening degree reaches the optimal state, with better ductility and plasticity. The contact between the copper powder and the graphene powder will be closer, thereby reducing the gap between the copper powder and the graphene powder, forming a denser billet.

[0064] The copper powder and the graphene powder are fully mixed by rotating the stirring rod 112 and the scraper 111 in the mixing chamber 100. After the mixing is completed, the mixture is discharged, and the mixture in the molding chamber 202 is extruded and molded by the molding mechanism 200. When the negative pressure mechanism 300 extrude the billet, the air in the molding chamber 202 is extracted by the exhaust device to reduce the air pressure inside the molding chamber 202, help the gas inside the billet to be discharged quickly, and form a more compact billet. The molded billet is output through the transmission mechanism 210.

[0065] Secondly, after the billet is extruded, it still has a certain temperature, which can save preheating time and speed up the melting speed in the subsequent heating and melting process of the billet.

[0066] Working principle: In the actual production process, copper-based powder and graphene powder can be fed into the mixing chamber 100 through the feed pipe 140, and the hot air output by the heating furnace is injected into the diversion mechanism 130 through the heat source pipe 132, and the hot air inside the diversion mechanism 130 is injected into the feed pipe 140 through the diversion pipe 131, and the hot air is injected into the rotating mechanism 110 through the connecting groove 114. After the hot air is injected into the feed pipe 140, it can not only preheat the raw materials, but also increase the speed of the raw materials injected into the mixing chamber 100 through the feed pipe 140. The hot air will mix The temperature in the bin 100 increases, and the temperature of the space in the mixing bin 100 is raised to between 400-1100°C. The copper powder absorbs the heat of the mixing bin 100, so that the temperature of the copper powder also increases. When the temperature of the copper powder rises to 400°C, the hardness and strength of the copper will be significantly reduced, that is, the copper begins to soften, and the copper can be deformed by external force. During the subsequent extrusion molding, the softened copper powder is squeezed by the external force, and the contact between the copper powder and the graphene powder will be closer, thereby reducing the gap between the copper powder and the graphene powder, which is conducive to obtaining a denser billet.

[0067] The driving mechanism 120 drives the rotating mechanism 110 to rotate, accelerating the raw materials injected into the mixing bin 100 to collide with the rotating stirring rod 112, and the raw materials can be evenly dispersed in the mixing bin 100, so that the raw materials are evenly dispersed, and the effect of evenly mixing two or more raw materials is achieved. When the raw materials are deposited at the bottom of the mixing bin 100, the hot air transported inside the rotating mechanism 110 can be sprayed out through the nozzle 113, and the hot air flow drives the raw material powder to turn over at the bottom of the mixing bin 100, and cooperates with the rotation of the scraper 111 to achieve full and even mixing of the raw materials.

[0068] When the mixing is completed, the pushing mechanism 250 moves to the side away from the molding bin 202, and the moving end of the pushing mechanism 250 contacts the end face of the lower surface of the first gate plate 220, and drives the first gate plate 220 to move along the slide groove 203, so that the first gate plate 220 moves in the direction away from the molding bin 202, thereby connecting the discharge port 150 with the molding bin 202, and the mixed raw materials can fall into the molding bin 202. During this process, the extrusion mechanism 240 is acted on by the elastic force of the first rebound mechanism 241, and the end of the extrusion mechanism 240 located in the molding bin 202 is always in contact with the surface of the partition 201.

[0069] After the raw materials fill the molding bin 202, the pushing mechanism 250 pushes out toward the molding bin 202, and the first gate plate 220 is reset under the elastic action of the second rebound mechanism 260 to block the discharge port 150. When the ejection end of the pushing mechanism 250 contacts the extrusion mechanism 240, the pushing mechanism 250 moves together with the extrusion mechanism 240 toward the molding bin 202, and the extrusion mechanism 240 extrude the mixed powder in the molding bin 202 to form a mixed powder blank. When the ejection end of the pushing mechanism 250 contacts the extrusion mechanism 240, the buckle 270 on the surface of the pushing mechanism 250 moves along the slot 231 on the surface of the second gate plate 230. As the pushing mechanism 250 continues to be ejected, the buckle 270 moves between the teeth 232. The spring piece 272 maintains the engagement between the buckle 270 and the teeth 232 through elastic force. When the extrusion is completed, the pushing mechanism 250 retracts, and the buckle 270 moves following the reset stroke of the pushing mechanism 250. Through the engagement between the buckle 270 and the teeth 232, the second gate plate 230 is driven to move along the slide groove 203, thereby opening the space below the forming bin 202, and the extruded blank falls to the surface of the transmission mechanism 210, and the blank is output.

[0070] When the second gate plate 230 completes opening the space below the molding bin 202, and before the ejection end of the propulsion mechanism 250 contacts the lower end surface of the first gate plate 220, the guide rod 271 on the surface of the buckle 270 will follow the movement of the propulsion mechanism 250 and enter the guide groove 204. The end of the guide groove 204 is inclined, and the guide rod 271 can be lifted, thereby lifting the buckle 270 through the guide rod 271, so that the buckle 270 is disengaged from the tooth 232. The second gate plate 230 moves toward the molding bin 202 under the elastic reaction force of the second rebound mechanism 260, so as to close the opening below the molding bin 202, and achieve the effect of controlling the movement of the first gate plate 220 and the second gate plate 230 without the need for additional propulsion equipment, thereby reducing the configuration of additional power mechanisms, which not only improves maneuverability and flexibility, but also reduces the manufacturing cost of the equipment.

[0071] During the extrusion molding process, since the powder raw material is heated, the hardness and strength of the copper will be significantly reduced. The copper can be deformed by external force, and the softened copper powder is squeezed by the external force. The contact between the copper powder and the graphene powder will be closer, thereby reducing the gap between the copper powder and the graphene powder to form a denser billet. When the negative pressure mechanism 300 extrude the billet, the air in the molding chamber 202 is extracted through the vacuum equipment, thereby reducing the air pressure inside the molding chamber 202, helping the gas inside the billet to be quickly discharged, and forming a denser billet.

[0072] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A blank mixing molding device for metal matrix composite materials, characterized in that: It comprises a mixing chamber (100), a forming mechanism (200) and a negative pressure mechanism (300); A rotating mechanism (110) is arranged inside the mixing bin (100), one end of the rotating mechanism (110) penetrating the mixing bin (100) is connected to a driving mechanism (120), a diversion mechanism (130) is arranged on the surface of the mixing bin (100), the rotating mechanism (110) is rotatably installed inside the diversion mechanism (130), a nozzle (113) is arranged at one end of the rotating mechanism (110) away from the driving mechanism (120), the diversion mechanism (130) is connected to a plurality of heat source pipes (132), and the plurality of heat source pipes (132) are connected to a heating furnace, a plurality of feeding pipes (140) are arranged on the surface of the mixing bin (100), and a plurality of evenly distributed connecting grooves (114) are provided on the surface of the rotating mechanism (110) located inside the diversion mechanism (130); The surface of the mixing bin (100) is provided with a forming mechanism (200), and the surface of the forming mechanism (200) is provided with a negative pressure mechanism (300). The forming mechanism (200) comprises a partition (201), a first gate (220), a second gate (230), an extrusion mechanism (240), a propulsion mechanism (250) and a buckle (270). The extrusion mechanism (240) is slidably mounted inside the partition (201), and the propulsion mechanism (250) is One end is in contact with the surface of one end of the extrusion mechanism (240); the propulsion mechanism (250) is provided with a plurality of buckles (270) near the surface of one end of the extrusion mechanism (240); the surfaces of the plurality of buckles (270) are all provided with guide rods (271); the inner wall of the molding mechanism (200) is provided with a guide groove (204); the surface of the second gate plate (230) is provided with a plurality of slots (231), and the interior of the slots (231) is provided with a plurality of teeth (232).

2. The device for mixed forming of a blank of a metal matrix composite material according to claim 1, characterized in that: The interior of the rotating mechanism (110) is hollow, the driving mechanism (120) is an electric motor, and the driving mechanism (120) is connected to the rotating mechanism (110) that passes through the top of the mixing chamber (100); A plurality of stirring rods (112) are arranged on the surface of the rotating mechanism (110), and the cross section of the stirring rods (112) is V-shaped. A plurality of scrapers (111) are arranged on the surface of one end of the rotating mechanism (110) away from the driving mechanism (120).

3. The device for mixed forming of a blank of a metal matrix composite material according to claim 1, characterized in that: A plurality of diversion tubes (131) are arranged on the surface of the diversion mechanism (130), and the diversion tubes (131) are connected to the feed tube (140).

4. The device for mixed forming of a blank of a metal matrix composite material according to claim 1, characterized in that: A discharge port (150) is provided on the surface of the mixing bin (100) at one end close to the forming mechanism (200).

5. The device for mixed forming of blanks of metal matrix composite materials according to claim 4, characterized in that: The partition plate (201), the first gate plate (220), the second gate plate (230) and the inner wall of the forming mechanism (200) form a forming bin (202), and the forming bin (202) is located below the discharge port (150).

6. A blank mixed molding device for metal matrix composite materials according to claim 1 or 5, characterized in that: The inner wall of the molding mechanism (200) is provided with a slide groove (203) adapted to the first gate plate (220) and the second gate plate (230), and the surfaces of one end of the first gate plate (220) and the second gate plate (230) are both provided with a second rebound mechanism (260), and the second rebound mechanism (260) is composed of a limit rod and a spring, and one end of the second rebound mechanism (260) is connected to the inner wall of the molding mechanism (200); The cross section of the first gate plate (220) is L-shaped, and the surface of the first gate plate (220) is in contact with the surface of the discharge port (150).

7. A blank mixed molding device for metal matrix composite materials according to claim 1 or 5, characterized in that: One end of the extrusion mechanism (240) facing away from the propulsion mechanism (250) is located inside the molding chamber (202), and a first rebound mechanism (241) is provided between the propulsion mechanism (250) and the partition plate (201), and the first rebound mechanism (241) is composed of a spring.

8. The device for mixed forming of blanks of metal matrix composite materials according to claim 1, characterized in that: The buckle (270) further comprises a spring sheet (272), wherein the spring sheet (272) is located inside the buckle (270), and the cross section of the spring sheet (272) is V-shaped.

9. The device for mixed forming of blanks of metal matrix composite materials according to claim 1, characterized in that: A transmission mechanism (210) is provided at the bottom end of the molding mechanism (200).

10. The device for mixed forming of blanks of metal matrix composite materials according to claim 1, characterized in that: The negative pressure mechanism (300) comprises an air bin (310), a mesh plate (320), a filter (330) and an air supply pipe (340); the negative pressure mechanism (300) is connected to the interior of the forming mechanism (200); and the air supply pipe (340) is connected to an air extraction device; The filter screen (330) is flush with the inner wall of the forming chamber (202), and the mesh plate (320) is located between the gas chamber (310) and the filter screen (330).

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