Method and apparatus for producing a metal powder sintered cartridge

Abstract

The application relates to the technical field of filter core production, in particular to a metal powder sintering filter core production method and equipment, which can make different parts of the same filter core have different filtering accuracies, can produce filter cores with different lengths, is convenient to use, has low limitations and high practicability; the equipment comprises a base plate, a supporting table, a degreasing kettle and a sintering furnace, the supporting table is installed on the base plate, and the degreasing kettle and the sintering furnace are both installed on the base plate; the equipment also comprises a lower die, an upper die, an injection head, a mixing box, a partition plate, a lifting device, a mixing device, a moving device and two groups of injection devices, the lower die and the upper die are respectively provided with a lower cavity and an upper cavity, the upper cavity and the lower cavity are communicated, the upper cavity and the lower cavity are combined into a cavity for forming a filter core, the lower die and the lifting device are both installed on the supporting table, and the upper die is installed on the lifting device.

Description

Technical Field

[0001] This invention relates to the technical field of filter element production, and in particular to a method and equipment for producing metal powder sintered filter elements. Background Technology

[0002] Metal powder sintering technology is a novel product manufacturing technology with important applications in machining. It is particularly suitable for producing filter elements with high filtration precision. Metal powder sintered filter elements are made by pressing and sintering metal powder particles together according to the shape of the filter element, and the filter pores on the filter element are formed by the gaps between the metal powder particles.

[0003] The existing process for sintered metal powder filter elements is as follows: First, treated metal powder and binder are mixed to form a fluid mixture. Then, the fluid metal powder is injected under pressure into a mold using an injection molding machine and cooled to form the filter element shape. After the filter element is removed from the mold, it is placed in a degreasing kettle for heating and degreasing. This liquefies and drains most of the low-temperature binder inside the filter element, leaving only a portion of the high-temperature resistant binder to maintain the basic shape. The degreased filter element is then placed in a sintering furnace for high-temperature sintering. This causes the remaining high-temperature resistant binder to evaporate or burn, and the metal powder to bond together under high temperature, forming a filter element with high porosity. It is evident that the size of the filter element pores is related to the diameter of the metal powder particles. The larger the diameter of the metal powder particles, the larger the pores formed; the smaller the diameter of the metal powder particles, the smaller the pores of the sintered filter element, and the higher the filtration accuracy.

[0004] During use, it was found that the existing metal powder sintering filter cartridge process only injects metal powder particles of the same size into the mold when molding. This process can only produce filter cartridges with the same filtration precision. However, when using filter cartridges to filter liquids, two steps, coarse filtration and fine filtration, are generally required to improve the filtration speed. Therefore, some customers need different filtration precision sections on a single filter cartridge according to their production needs. The existing metal powder sintering filter cartridge device is obviously unable to produce filter cartridges with different filtration precision sections on the same filter cartridge, resulting in high limitations in its use, inconvenience in use, and low practicality. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a method and equipment for producing metal powder sintered filter elements that can produce filter elements of different lengths, have different filtration accuracies at different parts of the same filter element, are convenient to use, have low limitations, and are highly practical.

[0006] The metal powder sintering filter element production equipment of the present invention includes a substrate, a support platform, a degreasing kettle, and a sintering furnace. The support platform is mounted on the substrate, and both the degreasing kettle and the sintering furnace are mounted on the substrate. It also includes a lower mold, an upper mold, an injection head, a mixing chamber, a partition, a lifting device, a mixing device, a moving device, and two sets of injection devices. The lower mold and the upper mold are respectively provided with a lower cavity and an upper cavity, which are connected. The upper cavity and the lower cavity are combined to form a chamber for forming the filter element. The lower mold and the lifting device are both mounted on the support platform, and the upper mold is mounted on the lifting device. The lifting device is used to adjust the height of the upper mold. Both the lower mold and the upper mold have injection ports on their left sides that communicate with the chamber. The output end of the injection head is located to the left of the injection port, and the input end of the injection head is connected to the mixing device. The injection head and mixing device are both mounted on a moving device. The moving device moves the injection head left and right. The mixing device has a mixing function and is connected to the output ends of two sets of injection devices. The mixing chamber is fixedly mounted on a base plate and has a cavity inside. A partition is installed inside the cavity, sealing and dividing the cavity into a left cavity and a right cavity. The left and right sides of the mixing chamber are respectively equipped with feed pipes communicating with the left and right cavities. The input ends of the two sets of injection devices are respectively connected to the left and right cavities, and the injection devices have a conveying function. A heating plate is installed inside the mixing chamber to heat the left and right cavities. First, two sets of metal powders with different particle sizes are added to the left and right cavities of the mixing chamber, respectively. A certain amount of adhesive is then added to the left and right cavities respectively, allowing the metal powder in the left and right cavities to mix with the adhesive in a flowing state under heating. Then, a lifting device presses the upper mold onto the lower mold, and the two sets of injection devices are opened, allowing the metal powder in the left and right cavities to be injected into the mixing device for mixing. Simultaneously, the mixed metal powder and adhesive are conveyed through the injection head into the cavity formed by the upper and lower molds. The metal powder and adhesive then cool and solidify into the shape of a filter element within the cavity. After the filter element is removed from the cavity, it passes through a degreasing kettle to remove the adhesive, and then passes through a sintering furnace where the metal powder particles are sintered at high temperature to form the final shape. Finally, it is injected into the cavity through the injection head. When injecting metal powder, the flow rates of the two injection devices can be adjusted separately. By controlling the proportion of metal powder in the mixing device at different times during the injection of metal powder into the chamber, the ratio of the two different particle sizes of metal powder injected into different parts of the chamber will be different, thereby forming filter elements with different filtration precisions in different parts of the chamber. For example, if the total time for injecting metal powder into the chamber is 6 seconds, if in the first 3 seconds, the proportion of large-particle metal powder injected into the mixing device is 20% and the proportion of small-particle metal powder is 80%, and in the last 3 seconds, the proportion of large-particle metal powder injected into the mixing device is 60% and the proportion of small-particle metal powder is 40%.In this case, the proportion of large metal powder particles in the filter element on the right side of the chamber is 20%, and the proportion of small metal powder particles is 80%. In the filter element on the left side of the chamber, the proportion of large metal powder particles is 60%, and the proportion of small metal powder particles is 40%. Therefore, the filter diameter formed by the metal powder particles in the left side of the filter element is larger than that formed by the metal powder particles in the right side of the filter element. Consequently, the filtration accuracy of the left side of the filter element is lower than that of the right side, resulting in filter elements with different filtration accuracy. By controlling the proportions of two different particle sizes of metal powder in different parts of the chamber at different times, different parts of a single filter element can have different filtration accuracies. This method has low limitations, is convenient to use, and has high practicality.

[0007] Preferably, the mixing device includes a mixing tube, a micro motor, a delivery tube A, and a delivery tube B. The mixing tube contains a mixing chamber, the right side of which is connected to an injection head. A rotating shaft is rotatably mounted inside the mixing tube, and multiple stirring blades are mounted on the shaft. The input end of the shaft is connected to the micro motor, which is fixedly mounted on the mixing tube. The output ends of both delivery tubes A and B are connected to the mixing chamber of the mixing tube. Valves are installed on both delivery tubes A and B. The input ends of delivery tubes A and B are respectively connected to the output ends of two sets of injection devices. The mixing tube is mounted on a moving device. The valves on delivery tubes A and B are connected to... An external controller is connected to control the valves on delivery pipes A and B. When injecting metal powder particles into the chamber, the controller controls the flow rate of the metal powder entering the mixing tube through delivery pipes A and B respectively, thereby controlling the ratio of different metal powders entering the mixing tube. At the same time, a micro motor is activated, which drives the rotating shaft to rotate, thereby rotating the stirring blades and promoting the mixing of the two metal powders in the mixing tube. The mixed metal powder is then fed into the injection head through the mixing tube, and then into the chamber to be formed into a filter element. This facilitates the mixing of the two sets of metal powders.

[0008] Preferably, the moving device includes an electric slide rail and a sliding plate. The electric slide rail is mounted on the lower mold, and the sliding plate is mounted on the electric slide rail. The electric slide rail is used to move the sliding plate left and right. The mixing tube and the injection head are both fixedly mounted on the sliding plate. When injecting metal powder into the cavity, the electric slide rail causes the sliding plate to move the injection head to the right until the injection head is in contact with the injection port, so that the mixture of metal powder and adhesive can be injected into the cavity for molding through the injection head, which improves convenience.

[0009] Preferably, the two sets of injection devices include two sets of delivery pumps and two sets of hoses. The input ends of the two sets of delivery pumps are respectively connected to the left cavity and the right cavity, and the output ends of the two sets of delivery pumps are provided with hoses. The output ends of the two sets of hoses are respectively connected to delivery pipe A and delivery pipe B. When injecting metal powder of different particle sizes into delivery pipe A and delivery pipe B, the two sets of delivery pumps are turned on, so that the metal powder in the left cavity and the right cavity enters the two sets of hoses through the two sets of delivery pumps, and then enters delivery pipe A and delivery pipe B through the two sets of hoses, which facilitates the delivery of metal powder particles.

[0010] Preferably, the lifting device includes a base block, a support plate, a hydraulic cylinder, a push rod, a lifting plate, and a sliding plate. The base block is fixedly installed on the support platform, the support plate is fixedly installed on the base block, the hydraulic cylinder is fixedly installed on the upper part of the support plate, the push rod is slidably installed on the support plate, and the upper end of the push rod is connected to the output end of the hydraulic cylinder. The lifting plate is fixedly installed on the lower end of the push rod, the sliding plate is fixedly installed on the lifting plate, and the sliding plate is slidably installed on the support plate. The upper mold is installed on the lower end of the lifting plate. When injecting metal powder into the mold, the hydraulic cylinder is opened, causing the push rod to drive the upper mold to descend through the lifting plate until the upper mold and the lower mold are in contact, so that the upper mold and the lower mold form a chamber for forming the filter element. When it is necessary to remove the filter element, the lifting plate drives the upper mold to rise, and then the formed filter element can be removed from the lower mold. This facilitates the removal and placement of the filter element.

[0011] Preferably, the mold also includes a pad, a hydraulic cylinder, a push rod, and a sealing plate. The hydraulic cylinder is fixedly mounted on the support platform via the pad. The push rod is slidably mounted on the right side of the lower mold, with its right end connected to the output end of the hydraulic cylinder. The sealing plate is fixedly mounted on the left end of the push rod and slidably mounted in the cavity formed by the lower and upper molds, with a sealed sliding connection between the sealing plate and the cavity. When metal powder is injected into the mold, the hydraulic cylinder is opened, and the hydraulic cylinder causes the sealing plate to slide left and right within the cavity via the push rod, controlling the position of the sealing plate within the cavity. When the metal powder and adhesive enter the cavity through the injection port on the left side of the mold, the metal powder and adhesive are formed on the left side of the sealing plate within the cavity. This allows for control of the filter element's length; the length of the formed filter element can be controlled by adjusting the position of the sealing plate. This design is convenient to use and has few limitations.

[0012] Preferably, the upper mold includes multiple sets of connecting blocks A, and the lower mold includes multiple sets of connecting blocks B. The multiple sets of connecting blocks A are fixedly connected to each other by bolts, and the multiple sets of connecting blocks B are fixedly connected to each other by bolts. With the above arrangement, both the upper mold and the lower mold are separate modular structures. When it is necessary to repair or replace a part of the upper mold or the lower mold, the part that needs to be repaired or replaced can be removed from the upper mold or the lower mold and then replaced. This facilitates the repair and maintenance of the upper mold and the lower mold.

[0013] Preferably, the system also includes multiple sets of support columns and multiple sets of mounting plates. Support columns are provided at the lower end of the lifting plate, and mounting plates are provided at the lower end of the support columns. Multiple sets of support columns are fixedly installed at the lower end of the lifting plate, and multiple sets of mounting plates are respectively fixedly installed at the lower ends of the multiple sets of support columns. The multiple sets of mounting plates are connected to multiple sets of connecting blocks A by bolts. Through this configuration, each connecting block A is independently connected to the lifting plate via mounting plates and support columns. When disassembling connecting block A, it is not necessary to disassemble the entire upper mold on the lifting plate, thus improving convenience.

[0014] Preferably, the system also includes filter plate A, filter plate B, two sets of rotating shafts, multiple sets of stirring plates, two sets of scrapers, two sets of conical wheels A, two sets of conical wheels B, two sets of drive shafts, two sets of vertical plates, and a dual-shaft motor. Filter plate A and filter plate B are respectively fixedly installed on the upper part of the left and right chambers. The filter pore sizes on filter plate A and filter plate B are different. The two sets of rotating shafts are respectively rotatably installed on filter plate A and filter plate B, and both sets of rotating shafts are rotatably installed on the mixing box. Multiple sets of stirring plates are provided at the lower part of each set of rotating shafts, and the two sets of scrapers are respectively fixedly installed on the two sets of rotating shafts. At the top, the lower ends of the two sets of scrapers are close to the upper ends of filter plate A and filter plate B, respectively. Two sets of conical wheels A are fixedly mounted on the upper ends of the two sets of rotating shafts, and each set of conical wheels A meshes with a conical wheel B. The two sets of conical wheels B are fixedly mounted on two sets of drive shafts, which are rotatably mounted on two sets of vertical plates. Both sets of vertical plates are fixedly mounted on the mixing chamber. The input ends of the two sets of drive shafts are connected to the two output ends of a dual-shaft motor, which is fixedly mounted at the top of the mixing chamber. Two sets of feed pipes are located at the top of filter plate A and filter plate B, respectively. Above, and on the left and right sides of the mixing chamber, there are inlet pipes. These two sets of inlet pipes connect to the left and right chambers respectively, and are located below filter plates A and B. First, the adhesive is added to the left and right chambers of the mixing chamber through the two sets of inlet pipes. Then, metal powder is added to the left and right chambers through the two sets of feed pipes. Simultaneously, the dual-shaft motor is turned on. The dual-shaft motor rotates the two sets of conical wheels B through two sets of drive shafts. The two sets of conical wheels B drive the two sets of conical wheels A to rotate. The two sets of conical wheels A drive the two sets of rotating shafts to rotate, and the two sets of rotating shafts respectively drive the two... The rotating scrapers promote the movement of metal powder on filter plates A and B, facilitating filtration and allowing metal powder of suitable particle size to fall into the left and right chambers respectively. Simultaneously, the two rotating shafts drive the connected multiple stirring plates to rotate, promoting the mixing of metal powder and binder in the left and right chambers. This improved filtration and enhanced convenience.

[0015] The method for producing the metal powder sintered filter element of the present invention includes the following steps: Step 1: Two metal powders of different particle sizes can be mixed with the binder in the left and right chambers of the mixing box, respectively. At the same time, the electric heating plate in the mixing box is heated to mix the metal powder and binder in the left and right chambers into a liquid state. Step 2: Use two sets of injection devices to inject the metal powder in the left and right chambers into the mixing device for mixing. At the same time, the mixing device mixes metal powder particles of different sizes. Step 3: The mixed metal powder particles are injected into the cavity of the mold through the injection head, and the proportion of metal powders of different particle sizes injected into the mixing device is different at different stages of injection. Step 4: The metal powder and binder are cooled and formed into a filter element within a mold; Step 5: After removing the filter element from the mold, place it in a degreasing kettle and heat it to remove the adhesive, and then recycle the adhesive. Step 6: Transfer the degreased filter element to a sintering furnace for sintering and shaping.

[0016] Because the proportions of two different particle sizes of metal powder injected into different parts of the mold cavity are different, different parts of the formed filter element have different filtration accuracies, resulting in low limitations.

[0017] Compared with the prior art, the beneficial effects of the present invention are: different parts of the same filter element can have different filtration accuracies, and filter elements of different lengths can be produced. It is convenient to use, has low limitations, and is highly practical. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the isometric structure of the present invention; Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle; Figure 3 It is a structural schematic diagram of hydraulic cylinders, delivery pumps, and base plates, etc. Figure 4 This is a structural diagram of the lifting device and the upper mold; Figure 5 This is a structural diagram of connecting block A, connecting block B, and hydraulic cylinder, etc. Figure 6 This is an exploded view of connecting block A and connecting block B; Figure 7 yes Figure 4 A magnified structural diagram of section B in the middle; Figure 8 This is a cross-sectional view of the mixing tank. Figure 9 This is a structural diagram of filter plate A, filter plate B, and rotating shaft, etc. Figure 10This is a schematic diagram of the main structure of the present invention; The following are labels in the attached diagram: 1. Base plate; 2. Support platform; 3. Lower mold; 4. Upper mold; 5. Injection head; 6. Mixing pipe; 7. Micro motor; 8. Delivery pipe A; 9. Delivery pipe B; 10. Electric slide rail; 11. Sliding plate; 12. Delivery pump; 13. Hoses; 14. Base block; 15. Support plate; 16. Hydraulic cylinder; 17. Push rod; 18. Lifting plate; 19. Slide plate; 20. Pad block; 21. Oil cylinder; 22. Push rod; 23. Sealing plate; 24. Connecting block A; 25. Connecting block B; 26. Support column; 27. Mounting plate; 28. Filter plate A; 29. ​​Filter plate B; 30. Rotating shaft; 31. Stirring plate; 32. Scraper; 33. Conical wheel A; 34. Conical wheel B; 35. Drive shaft; 36. Vertical plate; 37. Dual-axis motor; 40. Mixing box; 41. Partition plate. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. Example

[0020] like Figures 1 to 10The metal powder sintering filter element production equipment of the present invention includes a base plate 1, a support platform 2, a degreasing kettle, a sintering furnace, a lower mold 3, an upper mold 4, an injection head 5, a mixing box 40, a partition plate 41, a lifting device, a mixing device, a moving device, and two sets of injection devices. The support platform 2 is mounted on the base plate 1. The degreasing kettle and the sintering furnace are both mounted on the base plate 1. The lower mold 3 and the upper mold 4 are respectively provided with a lower cavity and an upper cavity, which are connected. The upper cavity and the lower cavity are combined to form a chamber for forming filter elements. The lower mold 3 and the lifting device are both mounted on the support platform 2. The upper mold 4 is mounted on the lifting device. The lifting device is used to adjust the height of the upper mold 4. The left side of both the lower mold 3 and the upper mold 4 is provided with an injection port communicating with the chamber. The output end of the injection head 5 is located to the left of the injection port. The input end of the injection head 5 is connected to the mixing device. The injection head 5 and the mixing device are both mounted on the moving device. The moving device is used to move the injection head 5 left and right. The mixing device has a mixing function and is connected to the output ends of the two sets of injection devices. The mixing box 40 The mixing chamber 40 is fixedly mounted on the substrate 1 and has a cavity inside. A partition 41 is installed inside the cavity, sealing and dividing the cavity into a left cavity and a right cavity. The left and right sides of the mixing chamber 40 are respectively provided with feed pipes communicating with the left and right cavities. The input ends of two sets of injection devices are respectively connected to the left and right cavities, and the injection devices have a conveying function. A heating plate is installed inside the mixing chamber 40 to heat the left and right cavities. First, two sets of metal powders with different particle sizes are added to the left and right cavities of the mixing chamber 40, respectively. Then, a certain amount of binder is added to the left and right cavities, respectively, so that the metal powders and binder in the left and right cavities react with each other during heating. The mixture is stirred into a flowing state. Then, the upper mold 4 is pressed down onto the lower mold 3 by a lifting device. Two sets of injection devices are then opened, allowing the metal powder in the left and right cavities to be injected into the mixing device for mixing. Simultaneously, the mixed metal powder and binder are transported together through injection head 5 into the cavity formed by the upper mold 4 and lower mold 3. The metal powder and binder then cool and solidify into the shape of a filter element within the cavity. After the filter element is removed from the cavity, it passes through a degreasing kettle to remove the binder, and then through a sintering furnace where the metal powder particles are sintered at high temperature to form the final shape. When injecting metal powder into the cavity through injection head 5, the two sets of injection devices can be adjusted separately. The flow rate of the device is controlled by varying the proportion of metal powder injected into the chamber at different times. This results in different proportions of the two different particle sizes of metal powder being mixed in the mixing device at different locations within the chamber, thereby forming filter elements with different filtration accuracies at different locations within the chamber. For example, if the total injection time of metal powder into the chamber is 6 seconds, and in the first 3 seconds, the proportion of large-particle metal powder injected into the mixing device is 20% and the proportion of small-particle metal powder is 80%, and in the last 3 seconds, the proportion of large-particle metal powder injected into the mixing device is 60% and the proportion of small-particle metal powder is 40%.In this case, the proportion of large metal powder particles in the filter element on the right side of the chamber is 20%, and the proportion of small metal powder particles is 80%. In the filter element on the left side of the chamber, the proportion of large metal powder particles is 60%, and the proportion of small metal powder particles is 40%. Therefore, the filter diameter formed by the metal powder particles in the left side of the filter element is larger than that formed by the metal powder particles in the right side of the filter element. Consequently, the filtration accuracy of the left side of the filter element is lower than that of the right side, resulting in filter elements with different filtration accuracy. By controlling the proportions of two different particle sizes of metal powder in different parts of the chamber at different times, different parts of a single filter element can have different filtration accuracies. This method has low limitations, is convenient to use, and has high practicality.

[0021] Referring to Figure 2, the mixing device includes a mixing tube 6, a micro motor 7, a delivery tube A8, and a delivery tube B9. The mixing tube 6 contains a mixing chamber, the right side of which is connected to the injection head 5. A rotating shaft is rotatably mounted inside the mixing tube 6, and multiple stirring blades are mounted on the shaft. The input end of the shaft is connected to the micro motor 7, which is fixedly mounted on the mixing tube 6. The output ends of both delivery tubes A8 and B9 are connected to the mixing chamber of the mixing tube 6. Valves are installed on both delivery tubes A8 and B9. The input ends of delivery tubes A8 and B9 are respectively connected to the output ends of two sets of injection devices. The mixing tube 6 is mounted on a moving device. The valves on delivery tubes A8 and B9... All doors are connected to an external controller, which controls the valves on delivery pipes A8 and B9. When metal powder particles are injected into the chamber, the controller controls the flow rate of the metal powder entering the mixing pipe 6 through delivery pipes A8 and B9, thereby controlling the ratio of different metal powders entering the mixing pipe 6. At the same time, the micro motor 7 is turned on, which drives the rotating shaft to rotate, thereby rotating the stirring plate and promoting the mixing of the two metal powders in the mixing pipe 6. The mixed metal powder is then fed into the injection head 5 through the mixing pipe 6, and then fed into the chamber through the injection head 5 to form a filter element. This facilitates the mixing of the two sets of metal powders.

[0022] Continue to refer to Figure 2 The moving device includes an electric slide rail 10 and a sliding plate 11. The electric slide rail 10 is mounted on the lower mold 3, and the sliding plate 11 is mounted on the electric slide rail 10. The electric slide rail 10 is used to move the sliding plate 11 left and right. The mixing tube 6 and the injection head 5 are both fixedly mounted on the sliding plate 11. When injecting metal powder into the cavity, the electric slide rail 10 causes the sliding plate 11 to move the injection head 5 to the right until the injection head 5 moves to fit with the injection port, so that the mixture of metal powder and adhesive can be injected into the cavity for molding through the injection head 5, which improves convenience.

[0023] Reference Figure 3The two injection devices include two sets of delivery pumps 12 and two sets of hoses 13. The input ends of the two sets of delivery pumps 12 are connected to the left and right chambers, respectively. The output ends of the two sets of delivery pumps 12 are each equipped with a hose 13. The output ends of the two sets of hoses 13 are connected to delivery pipe A8 and delivery pipe B9, respectively. When injecting metal powder of different particle sizes into delivery pipe A8 and delivery pipe B9, the two sets of delivery pumps 12 are turned on, so that the metal powder in the left and right chambers enters the two sets of hoses 13 through the two sets of delivery pumps 12, and then enters delivery pipe A8 and delivery pipe B9 through the two sets of hoses 13, respectively, which facilitates the delivery of metal powder particles.

[0024] Reference Figure 4 The lifting device includes a base block 14, a support plate 15, a hydraulic cylinder 16, a push rod 17, a lifting plate 18, and a sliding plate 19. The base block 14 is fixedly installed on the support platform 2, the support plate 15 is fixedly installed on the base block 14, the hydraulic cylinder 16 is fixedly installed on the upper end of the support plate 15, the push rod 17 is slidably installed on the support plate 15, and the upper end of the push rod 17 is connected to the output end of the hydraulic cylinder 16. The lifting plate 18 is fixedly installed on the lower end of the push rod 17, and the sliding plate 19 is fixedly installed on the lifting plate 18 and slidably installed on the support plate 15. The upper mold 4 is installed on the lower end of the lifting plate 18. When metal powder is injected into the mold, the hydraulic cylinder 16 is opened, causing the push rod 17 to drive the upper mold 4 to descend through the lifting plate 18 until the upper mold 4 fits against the lower mold 3, so that the upper mold 4 and the lower mold 3 form a chamber for forming the filter element. When the filter element needs to be removed, the lifting plate 18 drives the upper mold 4 to rise, and then the formed filter element can be removed from the lower mold 3. This facilitates the removal and placement of the filter element.

[0025] Reference Figure 5 The hydraulic cylinder 21 is fixedly installed on the support platform 2 via the pad 20. The push rod 22 is slidably installed on the right side of the lower mold 3, and the right end of the push rod 22 is connected to the output end of the hydraulic cylinder 21. The sealing plate 23 is fixedly installed on the left end of the push rod 22 and is slidably installed in the cavity formed by the lower mold 3 and the upper mold 4, with a sealed sliding connection between the sealing plate 23 and the cavity. When injecting metal powder into the mold, the hydraulic cylinder 21 is opened, and the hydraulic cylinder 21 causes the sealing plate 23 to slide left and right in the cavity via the push rod 22, controlling the position of the sealing plate 23 in the cavity. When the metal powder and adhesive enter the cavity through the injection port on the left side of the mold, the metal powder and adhesive are formed on the left side of the sealing plate 23 in the cavity. This allows for control of the length of the filter element. By adjusting the position of the sealing plate 23, the length of the formed filter element can be controlled, making it convenient to use and with low limitations.

[0026] Reference Figure 8 and Figure 9Filter plates A28 and B29 are fixedly installed on the upper parts of the left and right chambers, respectively. The filter pore sizes on filter plates A28 and B29 are different. Two sets of rotating shafts 30 are rotatably installed on filter plates A28 and B29, respectively, and both sets of rotating shafts 30 are rotatably installed on the mixing chamber 40. Multiple sets of stirring plates 31 are provided at the lower part of each set of rotating shafts 30. Two sets of scrapers 32 are fixedly installed on the upper parts of the two sets of rotating shafts 30, with the lower ends of the scrapers 32 close to the upper ends of filter plates A28 and B29, respectively. Two sets of conical wheels A33 are fixedly installed on... At the upper ends of the two sets of rotating shafts 30, two sets of conical wheels A33 mesh with two sets of conical wheels B34 respectively. The two sets of conical wheels B34 are fixedly mounted on two sets of drive shafts 35 respectively. The two sets of drive shafts 35 are rotatably mounted on two sets of vertical plates 36 respectively. Both sets of vertical plates 36 are fixedly mounted on the mixing chamber 40. The input ends of the two sets of drive shafts 35 are respectively connected to the two output ends of the dual-shaft motor 37. The dual-shaft motor 37 is fixedly mounted on the upper end of the mixing chamber 40. The two sets of feed pipes are located above the filter plates A28 and B29 respectively, and liquid inlets are provided on the left and right sides of the mixing chamber 40. Two sets of inlet pipes are connected to the left and right chambers respectively, and the inlet pipes are located below filter plates A28 and B29. First, the adhesive is added to the left and right chambers of the mixing box 40 through the two sets of inlet pipes. Then, metal powder is added to the left and right chambers through the two sets of feed pipes. At the same time, the dual-shaft motor 37 is turned on. The dual-shaft motor 37 drives the two sets of conical wheels B34 to rotate through the two sets of drive shafts 35. The two sets of conical wheels B34 drive the two sets of conical wheels A33 to rotate. The two sets of conical wheels A33 drive the two sets of rotating shafts 30 to rotate. The two sets of rotating shafts 30 drive the two sets of scrapers 32 to rotate respectively. When the scraper 32 rotates, it promotes the movement of metal powder on filter plates A28 and B29, thus facilitating the filtration of metal powder on filter plates A28 and B29. This allows metal powder of suitable particle size to fall into the left and right chambers respectively after being filtered by filter plates A28 and B29. At the same time, the two sets of rotating shafts 30 drive the multiple sets of stirring plates 31 connected to them to rotate. When the multiple sets of stirring plates 31 rotate, they promote the mixing of metal powder and binder in the left and right chambers. This promotes the mixing of metal powder and binder, and at the same time promotes the filtration of metal powder, improving convenience. Example

[0027] Reference Figure 5 and Figure 6 Based on Embodiment 1, the upper mold 4 includes multiple sets of connecting blocks A24, and the lower mold 3 includes multiple sets of connecting blocks B25. The multiple sets of connecting blocks A24 are fixedly connected to each other by bolts, and the multiple sets of connecting blocks B25 are also fixedly connected to each other by bolts. Through this arrangement, both the upper mold 4 and the lower mold 3 are separate modular structures. When it is necessary to repair or replace a part of the upper mold 4 or the lower mold 3, the part requiring repair or replacement can be disassembled from the upper mold 4 or the lower mold 3 for replacement. This facilitates the repair and maintenance of the upper mold 4 and the lower mold 3. It also includes multiple sets of support columns 26 and multiple sets of mounting plates 27. The lower end of the lifting plate 18 is provided with support columns 26 and the lower end of the support columns 26 is provided with mounting plates 27. Multiple sets of support columns 26 are fixedly installed at the lower end of the lifting plate 18, and multiple sets of mounting plates 27 are respectively fixedly installed at the lower end of the multiple sets of support columns 26. The multiple sets of mounting plates 27 are respectively connected to multiple sets of connecting blocks A24 by bolts. With the above configuration, each connecting block A24 is independently connected to the lifting plate 18 via the mounting plate 27 and the support column 26. When disassembling the connecting block A24, it is not necessary to disassemble the upper mold 4 as a whole on the lifting plate 18, which improves convenience.

[0028] The method for producing the metal powder sintered filter element of the present invention includes the following steps: Step 1: Two metal powders of different particle sizes can be mixed with the adhesive in the left and right chambers of the mixing box 40, respectively. At the same time, the electric heating plate in the mixing box 40 is heated to mix the metal powder and adhesive in the left and right chambers into a liquid state. Step 2: Use two sets of injection devices to inject the metal powder in the left and right chambers into the mixing device for mixing. At the same time, the mixing device mixes metal powder particles of different sizes. Step 3: The mixed metal powder particles are injected into the cavity of the mold through injection head 5, and the proportion of metal powders of different particle sizes injected into the mixing device is different at different stages of injection. Step 4: The metal powder and binder are cooled and formed into a filter element within a mold; Step 5: After removing the filter element from the mold, place it in a degreasing kettle and heat it to remove the adhesive, and then recycle the adhesive. Step 6: Transfer the degreased filter element to a sintering furnace for sintering and shaping.

[0029] In summary, the main beneficial effects of this invention are as follows: 1. It produces filter elements with different filtration accuracies in different parts of the same filter element, and the filtration accuracies of the filter element can be adjusted according to customer needs. It is convenient to use and has low limitations.

[0030] 2. It can produce filter elements of different lengths, with low limitations.

[0031] 3. It facilitates the inspection and maintenance of the mold.

[0032] The injection head 5, micro motor 7, electric slide rail 10, conveying pump 12, hydraulic cylinder 16 and dual-axis motor 37 of the metal powder sintering filter element production equipment of the present invention are all purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A metal powder sintered filter element production equipment, comprising a substrate (1), a support platform (2), a degreasing kettle, and a sintering furnace, wherein the support platform (2) is mounted on the substrate (1), and both the degreasing kettle and the sintering furnace are mounted on the substrate (1); characterized in that, It also includes a lower mold (3), an upper mold (4), an injection head (5), a mixing chamber (40), a partition (41), a lifting device, a mixing device, a moving device, and two sets of injection devices. The lower mold (3) and the upper mold (4) are respectively provided with a lower cavity and an upper cavity, which are connected. The upper cavity and the lower cavity are combined to form a chamber for molding filter elements. The lower mold (3) and the lifting device are both installed on the support platform (2). The upper mold (4) is installed on the lifting device. The lifting device is used to adjust the height of the upper mold (4). The left side of both the lower mold (3) and the upper mold (4) is provided with an injection port that communicates with the chamber. The output end of the injection head (5) is located on the left side of the injection port. (5) The input end is connected to the mixing device. The injection head (5) and the mixing device are both installed on the moving device. The moving device is used to move the injection head (5) left and right. The mixing device has a mixing function. The mixing device is connected to the output ends of the two sets of injection devices respectively. The mixing box (40) is fixedly installed on the base plate (1). The mixing box (40) has a cavity. The partition (41) is installed in the cavity. The partition (41) seals and divides the cavity into a left cavity and a right cavity. The left and right parts of the mixing box (40) are respectively provided with feed pipes that communicate with the left cavity and the right cavity. The input ends of the two sets of injection devices are respectively connected to the left cavity and the right cavity. The injection device has a conveying function. The mixing device includes a mixing tube (6), a micro motor (7), a delivery tube A (8), and a delivery tube B (9). The mixing tube (6) is provided with a mixing chamber. The right side of the mixing chamber is connected to the injection head (5). A rotating shaft is rotatably provided inside the mixing tube (6). Multiple stirring blades are provided on the rotating shaft. The input end of the rotating shaft is connected to the micro motor (7). The micro motor (7) is fixedly installed on the mixing tube (6). The output ends of the delivery tube A (8) and the delivery tube B (9) are both connected to the mixing chamber of the mixing tube (6). Valves are provided on the delivery tube A (8) and the delivery tube B (9). The input ends of the delivery tube A (8) and the delivery tube B (9) are respectively connected to the output ends of two sets of injection devices. The mixing tube (6) is installed on a mobile device. The two sets of injection devices include two sets of delivery pumps (12) and two sets of hoses (13). The input ends of the two sets of delivery pumps (12) are connected to the left cavity and the right cavity respectively. The output ends of the two sets of delivery pumps (12) are provided with hoses (13). The output ends of the two sets of hoses (13) are connected to delivery pipe A (8) and delivery pipe B (9) respectively. It also includes a pad (20), a cylinder (21), a push rod (22) and a sealing plate (23). The cylinder (21) is fixedly installed on the support platform (2) by the pad (20). The push rod (22) is slidably installed on the right side of the lower mold (3). The right end of the push rod (22) is connected to the output end of the cylinder (21). The sealing plate (23) is fixedly installed on the left end of the push rod (22). The sealing plate (23) is slidably installed in the cavity formed by the lower mold (3) and the upper mold (4). The sealing plate (23) and the cavity are connected in a sealed sliding manner. By controlling two different particle sizes of metal powder to be formed in different proportions at different times in different parts of the chamber, different parts of a filter element can have different filtration accuracies.

2. The metal powder sintering filter element production equipment as described in claim 1, characterized in that, The moving device includes an electric slide rail (10) and a sliding plate (11). The electric slide rail (10) is installed on the lower mold (3), and the sliding plate (11) is installed on the electric slide rail (10). The electric slide rail (10) is used to move the sliding plate (11) left and right. The mixing tube (6) and the injection head (5) are both fixedly installed on the sliding plate (11).

3. The metal powder sintering filter element production equipment as described in claim 1, characterized in that, The lifting device includes a base block (14), a support plate (15), a hydraulic cylinder (16), a push rod (17), a lifting plate (18), and a sliding plate (19). The base block (14) is fixedly installed on the support platform (2), the support plate (15) is fixedly installed on the base block (14), the hydraulic cylinder (16) is fixedly installed on the upper end of the support plate (15), the push rod (17) is slidably installed on the support plate (15), the upper end of the push rod (17) is connected to the output end of the hydraulic cylinder (16), the lifting plate (18) is fixedly installed on the lower end of the push rod (17), the sliding plate (19) is fixedly installed on the lifting plate (18), the sliding plate (19) is slidably installed on the support plate (15), and the upper mold (4) is installed on the lower end of the lifting plate (18).

4. The metal powder sintering filter element production equipment as described in claim 3, characterized in that, The upper mold (4) includes multiple sets of connecting blocks A (24), and the lower mold (3) includes multiple sets of connecting blocks B (25). The multiple sets of connecting blocks A (24) are fixedly connected by bolts, and the multiple sets of connecting blocks B (25) are fixedly connected by bolts.

5. The metal powder sintering filter element production equipment as described in claim 4, characterized in that, It also includes multiple sets of support columns (26) and multiple sets of mounting plates (27). The multiple sets of support columns (26) are all fixedly installed at the lower end of the lifting plate (18). The multiple sets of mounting plates (27) are respectively fixedly installed at the lower end of the multiple sets of support columns (26). The multiple sets of mounting plates (27) are respectively connected to multiple sets of connecting blocks A (24) by bolts, so that each connecting block A (24) is independently connected to the lifting plate (18) through the mounting plate (27) and the support column (26). When the connecting block A (24) is disassembled, it is not necessary to disassemble the upper mold (4) on the lifting plate (18) as a whole.

6. The metal powder sintering filter element production equipment as described in claim 1, characterized in that, It also includes filter plate A (28), filter plate B (29), two sets of rotating shafts (30), multiple sets of stirring plates (31), two sets of scrapers (32), two sets of conical wheels A (33), two sets of conical wheels B (34), two sets of drive shafts (35), two sets of vertical plates (36), and a dual-shaft motor (37). Filter plate A (28) and filter plate B (29) are fixedly installed on the upper part of the left and right chambers, respectively. The filter holes on filter plate A (28) and filter plate B (29) are different. Two sets of rotating shafts (30) are rotatably installed on filter plate A (28) and filter plate B (29), respectively. Both sets of rotating shafts (30) are rotatably installed on the mixing box (40). Multiple sets of stirring plates (31) are provided at the lower part of both sets of rotating shafts (30). Two sets of scrapers (32) are fixedly installed on the upper part of the two sets of rotating shafts (30), respectively. The lower ends of the two sets of scrapers (32) are respectively connected to filter plate A (28) and filter plate B (29). The upper end of plate B (29) is close to each other. Two sets of conical wheels A (33) are fixedly installed on the upper end of two sets of rotating shafts (30). The two sets of conical wheels A (33) mesh with two sets of conical wheels B (34). The two sets of conical wheels B (34) are fixedly installed on two sets of drive shafts (35). The two sets of drive shafts (35) are rotatably installed on two sets of vertical plates (36). The two sets of vertical plates (36) are fixedly installed on the mixing box (40). The input ends of the two sets of drive shafts (35) are connected to the two output ends of the dual-axis motor (37). The dual-axis motor (37) is fixedly installed on the upper end of the mixing box (40). The two sets of feed pipes are located above filter plate A (28) and filter plate B (29). The left and right parts of the mixing box (40) are respectively provided with liquid inlet pipes. The two sets of liquid inlet pipes are connected to the left and right chambers respectively. The liquid inlet pipes are located below filter plate A (28) and filter plate B (29).

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