Aluminum alloy powder metallurgy injection molding sintering device and process

Abstract

The invention relates to the technical field of injection molding equipment, and discloses an aluminum alloy powder metallurgy injection molding sintering device and a process thereof. The aluminum alloy powder metallurgy injection molding sintering device comprises a frame and a sintering device, on which a feeding device, an injection molding device and a conveying device are sequentially arranged, and the conveying device runs through the sintering device. The injection molding device comprises a fixed mold seat and a movable mold seat, a movable mold is fixedly installed on one side of the movable mold seat, and a fixed mold is fixedly installed on one side of the fixed mold seat, and the fixed mold is adapted to the movable mold. The invention uses an automated driving component and a conveying device, so that after the movable mold is separated from the fixed mold, the movable mold can be automatically rotated for demoulding, and after the demoulding is completed, the semi-finished workpiece automatically falls onto the conveying device, and there is no need to manually transfer the semi-finished workpiece, thereby realizing automatic demoulding, transfer and transportation of the semi-finished workpiece, and significantly improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding equipment, in particular to an aluminum alloy powder metallurgy injection molding sintering device and a process thereof. Background Art

[0002] Aluminum alloy powder injection molding is a new type of aluminum alloy forming technology, similar to metal powder injection molding technology, and is the main branch of powder injection molding technology. In the aluminum alloy powder injection molding process, the selected aluminum alloy powder is first mixed with a binder, and then the mixture is granulated and injection molded into the required shape. The binder is removed through degreasing and sintering, thus obtaining the aluminum alloy product we want.

[0003] Chinese patent CN104070167B discloses a powder injection molding process, and the specific process is as follows: the first step, mixing: using an internal mixer, putting metal powder material, wear-resistant metal elements, and organic adhesive into the internal mixer, in a closed environment, the temperature is controlled at 180°C, stirring, and producing particles; the second step, injection molding: using a mold with a hole mold and a threaded mold, using an injection machine to inject the particles into the injection port of the mold; the third step, degreasing and sintering: using a sintering furnace, putting the semi-finished product after the second step into the sintering furnace for degreasing and sintering; the fourth step, quenching: using a vacuum furnace, putting the semi-finished product after the third step into the vacuum furnace for quenching treatment, and the fifth step, cryogenic treatment: performing cryogenic treatment on the semi-finished product after the fourth step; the present invention is: using this set of production processes to manufacture guide rails and sliders, reducing drilling and tapping processes, making the process simpler and more environmentally friendly, shortening the production cycle, thereby increasing the production speed.

[0004] As shown in the above patent, metal powder injection molding is a precision manufacturing process that combines multiple steps such as metal powder preparation, binder selection, mixing, injection molding, and subsequent degreasing and sintering. In the traditional metal powder injection molding process, the use of molds to prepare semi-finished products is an indispensable part, and then it needs to go through multiple processes such as demolding, conveying and sintering before it can be finally formed. Since this series of operations often need to be carried out on multiple devices, the demolding and transportation of semi-finished products require a certain amount of manpower, so the production efficiency is relatively low.

[0005] Therefore, it is necessary to provide an aluminum alloy powder metallurgy injection molding sintering device to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide an aluminum alloy powder metallurgy injection molding sintering device and a process thereof, which realizes automatic demoulding, transfer and transportation of semi-finished workpieces and significantly improves production efficiency.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: an aluminum alloy powder metallurgy injection molding and sintering device, comprising a frame and a sintering device, the frame is sequentially provided with a feeding device, an injection molding device and a conveying device, the conveying device runs through the sintering device, the injection molding device comprises a fixed mold seat and a movable mold seat, a movable mold is fixedly installed on one side of the movable mold seat, a fixed mold is fixedly installed on one side of the fixed mold seat, the fixed mold is adapted to the movable mold, the output end of the feeding device is connected to a spray nozzle, a material injection port is provided on one side of the fixed mold seat, the spray nozzle is connected to the material injection port, a second support plate is fixedly installed on the frame, and a driving component for driving the movable mold to move and rotate is provided on the second support plate.

[0008] The present invention is further configured as follows: a first support plate is fixedly mounted on the frame, the fixed mold seat is fixedly mounted on the first support plate, guide pillars are fixedly mounted on the four corners of one side of the fixed mold seat, guide cylinders are fixedly mounted on the four corners of the movable mold seat, the guide cylinders penetrate the movable mold seat, and the guide pillars are matched with the guide cylinders.

[0009] The present invention is further configured as follows: the driving assembly includes a hydraulic cylinder and a mounting frame, the hydraulic cylinder is fixedly connected to the second support plate, and the output end of the hydraulic cylinder passes through the second support plate, the movable mold base is rotatably connected to the mounting frame through a connecting shaft, the movable mold base is fixedly connected to the connecting shaft, a push plate is fixedly installed on the output end of the hydraulic cylinder, the output end of the hydraulic cylinder is sleeved with a first spring, one end of the first spring is fixedly connected to the push plate, and the other end of the first spring is fixedly connected to the mounting frame, and a transmission assembly for driving the connecting shaft to rotate is provided on the mounting frame.

[0010] The present invention is further configured as follows: the transmission assembly includes an adjusting rod, a gear, a rack, a connecting rod and a second spring, and slide grooves are provided on both side walls of the mounting frame, the adjusting rod passes through the two slide grooves, and the adjusting rod slides in cooperation with the slide grooves, the height of the adjusting rod is lower than the height of the bottom wall of the push plate, the adjusting rod is located between the push plate and the second support plate, the gear is mounted on the connecting shaft, the rack is located at the bottom end of the gear, and the rack is meshed with the gear, the rack is connected to the adjusting rod through the connecting rod, a second spring is provided in the slide groove, and the adjusting rod is elastically connected to the inner side wall of the slide groove through the second spring.

[0011] The present invention is further configured as follows: the conveying device includes a motor, a conveyor belt and a transmission roller, two transmission rollers are provided, the two transmission rollers are respectively arranged on both sides of the sintering device, and the two transmission rollers are rotatably installed inside the frame, the conveyor belt is sleeved on the two transmission rollers, the conveyor belt passes through the sintering device, the motor is fixedly installed on one side of the frame, and the output end of the motor is fixedly connected to one of the transmission rollers.

[0012] The present invention is further configured as follows: two slide bars are fixedly mounted on one side of the mounting frame, the slide bars penetrate the second support plate, and the slide bars are slidably matched with the second support plate.

[0013] The present invention is further configured as follows: a groove is provided on one side of the movable mold, the groove is connected with the mold groove on the movable mold, a fixed block is slidably installed in the groove, an adjusting column is fixedly installed on one side of the fixed block, the adjusting column passes through the side wall of the movable mold, the adjusting column and the movable mold are slidably matched, a third spring is sleeved on the adjusting column, one end of the third spring is fixedly connected to the inner side wall of the groove, an adjusting block is fixedly installed on the end of the adjusting column away from the fixed block, a mounting rod is fixedly installed on the inner wall of the frame, a magnetic block is fixedly installed on the end of the mounting rod, the adjusting block is made of iron material, and when the movable mold rotates to a horizontal state, the magnetic block and the adjusting block are magnetically attracted to each other, so that the adjusting block moves toward the magnetic block.

[0014] The present invention is further configured as follows: an inclined surface is provided on the fixed block, a sealing block is fixedly installed on one side of the fixed mold, and when the mold is closed, the sealing block closes the opening on one side of the groove.

[0015] The above-mentioned aluminum alloy powder metallurgy injection molding sintering device performs a powder metallurgy process, comprising the following steps:

[0016] S1. The aluminum alloy powder is mixed with a binder to obtain a mixture, the mixture is fed into a spray nozzle through a feeding device, and the mixture is injected into an injection molding device through the spray nozzle into a desired shape, thereby obtaining a semi-finished workpiece;

[0017] S2. Separate the movable mold from the fixed mold for demoulding. During demoulding, the movable mold is driven by the driving component to move horizontally to separate it from the fixed mold. At this time, the semi-finished workpiece moves with the movable mold. The movable mold is then driven by the driving component to rotate 90° so that the mold groove on the movable mold faces downward, so that the semi-finished workpiece in the movable mold automatically falls off and falls downward onto the conveying device;

[0018] S3. The semi-finished workpiece is transported to the sintering device through the conveying device for degreasing and sintering, and then put into the vacuum furnace for quenching treatment.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. The present invention integrates a feeding device, an injection molding device, a conveying device and a sintering device into one device. The entire production process from feeding, injection molding to conveying and sintering can be completed on one device, which effectively shortens the production cycle. Through the automated driving assembly and conveying device, after the movable mold is separated from the fixed mold, the movable mold can automatically rotate for demoulding, and after demoulding, the semi-finished workpiece automatically falls onto the conveying device, without the need for manual transfer of the semi-finished workpiece, thereby realizing automatic demoulding, transfer and conveying of the semi-finished workpiece, and significantly improving production efficiency;

[0021] 2. In the present invention, when the push plate fits with the back wall of the movable mold seat, the movable mold seat is in a vertical state, so that the push plate can be positioned to prevent the movable mold seat from being difficult to rotate to a vertical state due to insufficient elastic force of the second spring, so that the guide column can be inserted into the guide cylinder to ensure the mold closing process. The rotation and movement of the movable mold seat are driven by the power of the hydraulic cylinder, so that the movable mold can rotate automatically after reaching the specified position, without the need to set up other structures for driving, and the synchronization and stability are good. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the fixed mold base and the fixed mold of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the injection molding device of the present invention;

[0026] Figure 5 For the present invention Figure 5 A schematic diagram of the enlarged structure at point A;

[0027] Figure 6 It is a structural schematic diagram of the fixing block, the adjusting column and the adjusting block of the present invention;

[0028] Figure 7 It is a schematic structural diagram of the movable mold base of the present invention during demoulding;

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the transmission assembly of the present invention;

[0030] Fig. 9 It is a schematic diagram of the cross-sectional structure of the movable mold and the fixed mold of the present invention when they are molded together;

[0031] Fig.10 For the present invention Fig. 9 A schematic diagram of the enlarged structure at B;

[0032] Fig.11 It is a structural schematic diagram of the conveying device of the present invention;

[0033] Fig.12 For the present invention Fig.11 Enlarged structural diagram at C.

[0034] In the figure: 1, frame; 2, conveying device; 201, motor; 202, conveyor belt; 203, transmission roller; 3, feeding device; 4, sintering device; 5, first support plate; 6, second support plate; 7, fixed die seat; 8, fixed die; 801, injection port; 9, movable die seat; 10, movable die; 1001, groove; 11, guide column; 12, guide cylinder; 13, hydraulic cylinder; 14, mounting frame; 1401, slide groove; 15, slide rod; 16, push plate; 17, first spring; 18, connecting shaft; 19, gear; 20, rack; 21, adjusting rod; 22, connecting rod; 23, second spring; 24, fixed block; 25, third spring; 26, adjusting block; 27, adjusting column; 28, sealing block; 29, mounting rod; 30, magnetic block; 31, spray nozzle. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] See also Figures 1 to 8 and Fig.11In an embodiment of the present invention, an aluminum alloy powder metallurgy injection molding sintering device comprises a frame 1 and a sintering device 4. A feeding device 3, an injection molding device and a conveying device 2 are sequentially arranged on the frame 1. The conveying device 2 runs through the sintering device 4. The feeding device 3 is preferably a screw feeder. The screw feeder is a mechanical device that uses a motor to drive a screw to rotate and push materials to achieve the purpose of conveying. The sintering device 4 is a device specially used to make the powder compact obtain the required physical, mechanical properties and microstructure through sintering. The sintering process is a key step in the field of powder metallurgy. It hardens the material by baking it at a temperature lower than the melting temperature of the metal. The "molded parts" are hardened molded parts that have undergone this process and are called "sintered metal" or "sintered products". The screw feeder and the sintering device 4 are both prior art and are not described in detail. The injection molding device includes a fixed mold base 7 and a movable mold base 9. A movable mold 10 is fixedly installed on one side of the movable mold base 9. A fixed mold 8 is fixedly installed on one side of the fixed mold base 7. The fixed mold 8 is adapted to the movable mold 10. The output end of the feeding device 3 is connected to a spray nozzle 31. A material injection port 801 is provided on one side of the fixed mold base 7. The spray nozzle 31 is connected to the material injection port 801. The spray nozzle 31 is a special nozzle for powder metallurgy injection molding. The nozzle is designed The design needs to meet specific injection requirements, such as controlling the flow rate, pressure and injection speed of the material. In addition, the nozzle itself has a heating function, and the structural design of the nozzle also needs to consider the characteristics of the material, such as the viscosity, density and melting point of the material. The injection port 801 is connected to the mold cavity of the fixed mold 8 and conveys the material into the mold cavity. A second support plate 6 is fixedly installed on the frame 1, and a driving component for driving the movable mold 10 to move and rotate is provided on the second support plate 6. When in use, the aluminum alloy powder is mixed with a certain proportion of a binder to obtain a uniform mixture with a certain fluidity. The aluminum alloy powder is a rapidly solidified powder prepared by aerosolization or other methods. The mixed material is fed into the injection nozzle 31 through the feeding device 3, and the mixed material is injected into the injection molding device through the injection nozzle 31 and injected into the desired shape, thereby obtaining a semi-finished workpiece, and then demolding is performed. During demolding, the movable mold 10 is driven horizontally by the driving component to separate it from the fixed mold 8. At this time, the semi-finished workpiece moves with the movable mold 10, and then the movable mold 10 is driven by the driving component to rotate 90°, so that the mold groove on the movable mold 10 faces downward, so that the semi-finished workpiece in the movable mold 10 automatically falls off and falls downward onto the conveying device 2, and is conveyed to the sintering device 4 through the conveying device 2 for degreasing and sintering, so that it becomes a dense and strong metal part;This solution integrates the feeding device 3, injection molding device, conveying device 2 and sintering device 4 into one device. From feeding, injection molding to conveying and sintering, the entire production process can be completed on one device, effectively shortening the production cycle. Through the automated driving components and conveying device 2, after the movable mold 10 is separated from the fixed mold 8, the movable mold 10 can automatically rotate for demoulding, and after demoulding, the semi-finished workpiece automatically falls onto the conveying device 2. There is no need to manually transport the semi-finished workpiece, realizing automatic demoulding, transportation and transportation of the semi-finished workpiece, significantly improving production efficiency. ;

[0037] In this embodiment, preferably, a first support plate 5 is fixedly mounted on the frame 1, the fixed mold base 7 is fixedly mounted on the first support plate 5, guide columns 11 are fixedly mounted on the four corners of one side of the fixed mold base 7, guide cylinders 12 are fixedly mounted on the four corners of the movable mold base 9, the guide cylinders 12 penetrate the movable mold base 9, the guide columns 11 are matched with the guide cylinders 12, so that the guide columns 11 can be inserted into the guide cylinders 12, and the end of the guide columns 11 is set to a truncated cone shape, so that the guide columns 11 can be more easily inserted into the guide cylinders 12, and the setting of the guide columns 11 and the guide cylinders 12 makes the positioning of the fixed mold 8 and the movable mold 10 more precise when the mold is closed.

[0038] In this embodiment, preferably, the driving assembly includes a hydraulic cylinder 13 and a mounting frame 14, the hydraulic cylinder 13 is fixedly connected to the second support plate 6, and the output end of the hydraulic cylinder 13 passes through the second support plate 6, the output end of the hydraulic cylinder 13 is slidably matched with the second support plate 6, the hydraulic cylinder 13 adopts a multi-stage hydraulic cylinder 13, the movable mold base 9 is rotatably connected to the mounting frame 14 through a connecting shaft 18, the movable mold base 9 is fixedly connected to the connecting shaft 18, the output end of the hydraulic cylinder 13 is fixedly installed with a push plate 16, the output end of the hydraulic cylinder 13 is sleeved with a first spring 17, one end of the first spring 17 is fixedly connected to the push plate 16, the other end of the first spring 17 is fixedly connected to the mounting frame 14, and the mounting frame 14 is provided with a transmission assembly for driving the connecting shaft 18 to rotate; the The transmission assembly includes an adjusting rod 21, a gear 19, a rack 20, a connecting rod 22 and a second spring 23; both side walls of the mounting frame 14 are provided with a slide groove 1401, the adjusting rod 21 passes through the two slide grooves 1401, and the adjusting rod 21 and the slide groove 1401 are slidably matched, the height of the adjusting rod 21 is lower than the height of the bottom wall of the push plate 16, the adjusting rod 21 is located between the push plate 16 and the second support plate 6, the gear 19 is sleeved on the connecting shaft 18, the rack 20 is located at the bottom end of the gear 19, and the rack 20 is meshed with the gear 19, the rack 20 is connected to the adjusting rod 21 through the connecting rod 22, the slide groove 1401 is provided with a second spring 23, and the adjusting rod 21 is elastically connected to the inner wall of the slide groove 1401 through the second spring 23;When the mounting frame 14 is not in contact with the second support plate 6, under the elastic force of the first spring 17, the push plate 16 fits against the back wall of the movable die seat 9, and the movable die seat 9 is in a vertical state, so that the push plate 16 can be better positioned. When the output end of the hydraulic cylinder 13 contracts, the hydraulic cylinder 13 drives the mounting frame 14 and the movable die seat 9 to move toward the second support plate 6 together. At this time, the movable die seat 9 is still in a vertical state. When the mounting frame 14 fits against the second support plate 6, the mounting frame 14 stops moving. At this time, the output end of the hydraulic cylinder 13 continues to drive the push plate 16 to move toward the second support plate 6 and compress the first spring 17. When the push plate 16 moves to contact the adjusting rod 21, the push plate 16 drives the adjusting rod 21 to move rightward, thereby driving the rack 20 to move rightward through the connecting rod 22. When the rack 20 moves rightward, it drives the gear 19 to rotate. When the gear 19 rotates, it drives the movable mold seat 9 to rotate through the connecting shaft 18, thereby causing the movable mold 10 to rotate downward 90°. At this time, when the semi-finished workpiece is self- Under the action of body gravity, it can be automatically demoulded and fall onto the conveying device 2. When the mold is closed, the push plate 16 is driven to move to the left by the output end of the hydraulic cylinder 13. When the push plate 16 moves to the left, under the elastic force of the second spring 23, the adjusting rod 21 moves to the left with the push plate 16 until it contacts the inner wall of the slide groove 1401. At this time, the adjusting rod 21 drives the rack 20 to move to the left through the connecting rod 22, so that the gear 19 drives the movable mold seat 9 to reset through the connecting shaft 18. When the push plate 16 is in contact with the back wall of the movable mold seat 9, the movable mold seat 9 is in a vertical state, so that the push plate 16 can be positioned to prevent the movable mold seat 9 from being difficult to rotate to a vertical state due to insufficient elastic force of the second spring 23, so that the guide column 11 can be inserted into the guide cylinder 12 to ensure the progress of the mold closing process. The rotation and movement of the movable mold seat 9 are driven by the power of the hydraulic cylinder 13, so that the movable mold 10 can automatically rotate after reaching the specified position, without the need to set other structures for driving, and the synchronization and stability are good. ;

[0039] In this embodiment, preferably, the conveying device 2 includes a motor 201, a conveyor belt 202 and a transmission roller 203. Two transmission rollers 203 are provided. The two transmission rollers 203 are respectively arranged on both sides of the sintering device 4, and the two transmission rollers 203 are rotatably installed inside the frame 1. The conveyor belt 202 is sleeved on the two transmission rollers 203, and the conveyor belt 202 runs through the sintering device 4. The motor 201 is fixedly installed on one side of the frame 1, and the output end of the motor 201 is fixedly connected to one of the transmission rollers 203; the transmission roller 203 can be driven to rotate by the output end of the motor 201, and the conveyor belt 202 is driven to rotate when the transmission roller 203 rotates. When the semi-finished workpiece falls onto the conveyor belt 202, the conveyor belt 202 transports the semi-finished workpiece to the sintering device 4, and then outputs it after sintering by the sintering device 4. It should be noted that the sintering device 4 is set long enough to ensure that the injection molding speed of the workpiece is compatible with the sintering speed. The conveyor belt 202 adopts a metal chain conveyor belt 202 with high temperature resistance.

[0040] In this embodiment, preferably, two slide bars 15 are fixedly mounted on one side of the mounting frame 14 , the slide bars 15 pass through the second support plate 6 , and the slide bars 15 are slidably matched with the second support plate 6 , thereby providing auxiliary support to the mounting frame 14 .

[0041] During the rotation of the movable mold 10 , the semi-finished workpiece in the movable mold 10 may fall off prematurely, so that the semi-finished workpiece may not fall accurately onto the conveyor belt 202 . In order to solve this problem, the following embodiments are provided.

[0042] See also Figure 5 , Figure 6 and Figures 9 to 12In the embodiment of the present invention, a groove 1001 is provided on one side of the movable mold 10, and the groove 1001 is connected to the mold groove on the movable mold 10. A fixed block 24 is slidably installed in the groove 1001, and an adjusting column 27 is fixedly installed on one side of the fixed block 24. The adjusting column 27 passes through the side wall of the movable mold 10, and the adjusting column 27 is slidably matched with the movable mold 10. A third spring 25 is sleeved on the adjusting column 27, and one end of the third spring 25 is fixedly connected to the inner side wall of the groove 1001. An adjusting block 26 is fixedly installed on the end of the adjusting column 27 away from the fixed block 24, and a mounting rod 29 is fixedly installed on the inner wall of the frame 1, and the end of the mounting rod 29 is fixedly installed A magnetic block 30 is installed, and the adjustment block 26 is made of iron material. When the movable mold 10 rotates to a horizontal state, the magnetic block 30 and the adjustment block 26 are magnetically attracted to each other, so that the adjustment block 26 moves toward the magnetic block 30; an inclined surface is provided on the fixed block 24, and a sealing block 28 is fixedly installed on one side of the fixed mold 8. When the mold is closed, the sealing block 28 closes the opening on one side of the groove 1001 to prevent the groove 1001 from interfering with the molding of the semi-finished workpiece, thereby ensuring the molding quality of the semi-finished workpiece; when the mold is closed, the sealing block 28 pushes the fixed block 24 to move through the inclined surface on the fixed block 24, and gradually closes the opening on one side of the groove 1001, and then injection molding can be carried out, and the injection molding is completed. After demoulding, when the fixed mold 8 is separated from the movable mold 10, the sealing block 28 gradually moves out of the groove 1001. At this time, under the elastic force of the third spring 25, the fixed block 24 moves toward the semi-finished workpiece and presses on its inner wall, thereby squeezing and fixing the semi-finished workpiece to prevent the semi-finished workpiece from falling off during the rotation of the movable mold 10. When the movable mold 10 rotates to a horizontal state, the magnetic block 30 and the adjusting block 26 are magnetically attracted to each other, so that the adjusting block 26 moves toward the magnetic block 30. When the adjusting block 26 moves, the fixed block 24 is driven to move through the adjusting column 27, thereby releasing the fixation of the semi-finished workpiece, so that the semi-finished workpiece can fall downward onto the conveyor belt 202 under the action of gravity. There is a gap of 10-30cm when the semi-finished workpiece falls onto the conveyor belt 202. During the falling process, the semi-finished workpiece is subjected to a certain impact. If there are certain defects in the molding of the semi-finished workpiece itself, the impact resistance of the semi-finished workpiece will be reduced. Such semi-finished products will break when they fall onto the conveyor belt 202. Therefore, an optical detection device and a manipulator can be set on the frame 1. The defective semi-finished workpiece can be detected by the optical detection device and then taken out by the manipulator, so that the molded semi-finished workpiece can be tested for impact resistance, and unqualified semi-finished workpieces can be screened out in time. Compared with finished workpieces, the recycling cost of semi-finished workpieces is lower, which can effectively reduce production costs.

[0043] The present invention also discloses an aluminum alloy powder metallurgy injection molding sintering process, comprising the following steps:

[0044] S1. The aluminum alloy powder is mixed with a binder to obtain a mixture, the mixture is fed into the injection nozzle 31 through the feeding device 3, and the mixture is injected into the injection molding device through the injection nozzle 31 into a desired shape, thereby obtaining a semi-finished workpiece;

[0045] S2. Separate the movable mold 10 from the fixed mold 8 for demolding. During demolding, the movable mold 10 is driven by the driving component to move horizontally to separate it from the fixed mold 8. At this time, the semi-finished workpiece moves with the movable mold 10. Then, the driving component drives the movable mold 10 to rotate 90° so that the mold groove on the movable mold 10 faces downward, so that the semi-finished workpiece in the movable mold 10 automatically falls off and falls downward onto the conveying device 2;

[0046] S3. The semi-finished workpiece is transported to the sintering device 4 through the conveying device 2 for degreasing and sintering, and then put into the vacuum furnace for quenching treatment.

[0047] Quenching is the process of heating the material to a point above the critical point and then rapidly cooling it to increase its hardness and strength. This method is commonly used to harden steel and other alloys to improve their wear resistance and corrosion resistance.

[0048] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. An aluminum alloy powder metallurgy injection molding sintering device, comprising a frame (1) and a sintering device (4), wherein a feeding device (3), an injection molding device and a conveying device (2) are sequentially arranged on the frame (1), and the conveying device (2) passes through the sintering device (4), characterized in that: The injection molding device comprises a fixed mold base (7) and a movable mold base (9), a movable mold (10) is fixedly mounted on one side of the movable mold base (9), a fixed mold (8) is fixedly mounted on one side of the fixed mold base (7), the fixed mold (8) is adapted to the movable mold (10), an output end of the feeding device (3) is connected to a spray nozzle (31), a side of the fixed mold base (7) is provided with a material injection port (801), the spray nozzle (31) is connected to the material injection port (801), a second support plate (6) is fixedly mounted on the frame (1), and a driving component for driving the movable mold (10) to move and rotate is provided on the second support plate (6); A first support plate (5) is fixedly mounted on the frame (1), the fixed die seat (7) is fixedly mounted on the first support plate (5), four corners of one side of the fixed die seat (7) are fixedly mounted with guide pillars (11), four corners of the movable die seat (9) are fixedly mounted with guide cylinders (12), the guide cylinders (12) penetrate the movable die seat (9), and the guide pillars (11) are matched with the guide cylinders (12); The driving assembly comprises a hydraulic cylinder (13) and a mounting frame (14); the hydraulic cylinder (13) is fixedly connected to the second support plate (6), and the output end of the hydraulic cylinder (13) passes through the second support plate (6); the movable die seat (9) is rotatably connected to the mounting frame (14) via a connecting shaft (18); the movable die seat (9) is fixedly connected to the connecting shaft (18); a push plate (16) is fixedly installed at the output end of the hydraulic cylinder (13); a first spring (17) is sleeved on the output end of the hydraulic cylinder (13); one end of the first spring (17) is fixedly connected to the push plate (16); the other end of the first spring (17) is fixedly connected to the mounting frame (14); and a transmission assembly for driving the connecting shaft (18) to rotate is arranged on the mounting frame (14); The transmission assembly comprises an adjusting rod (21), a gear (19), a rack (20), a connecting rod (22) and a second spring (23); both side walls of the mounting frame (14) are provided with sliding grooves (1401); the adjusting rod (21) passes through the two sliding grooves (1401), and the adjusting rod (21) and the sliding grooves (1401) are slidably matched; the height of the adjusting rod (21) is lower than the height of the bottom wall of the push plate (16); the adjusting rod (21) is located on the push plate (16) The gear (19) is mounted on the connecting shaft (18) between the first and second supporting plates (1401), the gear (19) is mounted on the connecting shaft (18), the rack (20) is located at the bottom end of the gear (19), and the rack (20) is meshed with the gear (19), the rack (20) is connected to the adjusting rod (21) via a connecting rod (22), a second spring (23) is arranged in the sliding groove (1401), and the adjusting rod (21) is elastically connected to the inner wall of the sliding groove (1401) via the second spring (23); The conveying device (2) comprises a motor (201), a conveyor belt (202) and a transmission roller (203); two transmission rollers (203) are provided, and the two transmission rollers (203) are respectively provided on both sides of the sintering device (4), and the two transmission rollers (203) are rotatably mounted inside the frame (1); the conveyor belt (202) is sleeved on the two transmission rollers (203), and the conveyor belt (202) passes through the sintering device (4); the motor (201) is fixedly mounted on one side of the frame (1), and the output end of the motor (201) is fixedly connected to one of the transmission rollers (203); Two slide bars (15) are fixedly mounted on one side of the mounting frame (14), the slide bars (15) pass through the second support plate (6), and the slide bars (15) are slidably matched with the second support plate (6); A groove (1001) is provided on one side of the movable mold (10), the groove (1001) is connected to the mold groove on the movable mold (10), a fixed block (24) is slidably installed in the groove (1001), an adjustment column (27) is fixedly installed on one side of the fixed block (24), the adjustment column (27) passes through the side wall of the movable mold (10), the adjustment column (27) and the movable mold (10) are slidably matched, a third spring (25) is sleeved on the adjustment column (27), one end of the third spring (25) is connected to the movable mold (10), and the third spring (25) is connected to the movable mold (10). The inner wall of the groove (1001) is fixedly connected, an end of the adjustment column (27) away from the fixed block (24) is fixedly mounted with an adjustment block (26), an inner wall of the frame (1) is fixedly mounted with a mounting rod (29), an end of the mounting rod (29) is fixedly mounted with a magnetic block (30), the adjustment block (26) is made of iron material, and when the movable mold (10) rotates to a horizontal state, the magnetic block (30) and the adjustment block (26) are magnetically attracted to each other, so that the adjustment block (26) moves toward the magnetic block (30); The fixed block (24) is provided with an inclined surface, and a sealing block (28) is fixedly mounted on one side of the fixed mold (8). When the mold is closed, the sealing block (28) closes the opening on one side of the groove (1001).

2. A process for powder metallurgy using the aluminum alloy powder metallurgy injection molding sintering device according to claim 1, characterized in that: The following steps are involved: S1. mixing aluminum alloy powder and a binder to obtain a mixture, feeding the mixture into a spray nozzle (31) through a feeding device (3), and injecting the mixture into an injection molding device through the spray nozzle (31) to form a desired shape, thereby obtaining a semi-finished workpiece; S2. Separating the movable mold (10) from the fixed mold (8) for demoulding. During demoulding, the movable mold (10) is driven by the driving component to move horizontally to separate it from the fixed mold (8). At this time, the semi-finished workpiece moves with the movable mold (10). The movable mold (10) is then driven by the driving component to rotate 90 degrees so that the mold groove on the movable mold (10) faces downward, thereby causing the semi-finished workpiece in the movable mold (10) to automatically fall off and fall downward onto the conveying device (2); S3. The semi-finished workpiece is transported to the sintering device (4) through the conveying device (2) for degreasing and sintering, and then put into the vacuum furnace for quenching treatment.

Images