An indirect 3D printing device and method based on MIM technology feeding

Abstract

This invention belongs to the field of 3D printing device technology, specifically an indirect 3D printing device and method based on MIM technology feeding. It includes a printer body, an MIM feeding system, a feeding end, and a print head. It also includes a filter plate, which is fixedly installed inside the feeding end to filter the mixture fed by the MIM feeding system. A rotating shaft is rotatably installed inside the feeding end, and a material blocking frame is fixedly installed on the shaft. A first processing block is disposed inside the material blocking frame, with its bottom end abutting the top end of the filter plate and its top end inclined. An inlet is provided on the material blocking frame. A second processing block is slidably installed inside the material blocking frame, with its bottom end inclined. The top end of the first processing block abuts the bottom end of the second processing block. Through the combined use of these structures, the uniformity and flowability of the feeding can be effectively ensured, further improving the 3D printing quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of 3D printing devices, and specifically relates to an indirect 3D printing device and method based on MIM technology feeding. Background Art

[0002] MIM technology is metal injection molding, which uses pre-prepared composite materials (a mixture of metal powder and binder) as feed to achieve precise printing and manufacturing of metal parts. MIM technology feed 3D printing equipment integrates multiple process links such as material preparation, 3D printing molding, degreasing treatment, sintering treatment, etc. The equipment achieves layer-by-layer construction and densification of metal parts by precisely controlling the extrusion of feed, movement of print head and solidification of material.

[0003] If the particle size of the metal powder and binder mixture is too fine or the shape is irregular, the contact area between the powder particles may increase, the adsorption force may be enhanced, and agglomeration may occur easily. At the same time, if the humidity of the metal powder is too high, water bridges may be formed between the powder particles, which will cause agglomeration during the melting process. The agglomeration phenomenon will cause the mixture to be unevenly distributed during the printing process, thereby affecting the geometric accuracy and surface quality of the printed part, and destroying the overall flatness and consistency of the printed part. In addition, the agglomeration of the mixture may clog the nozzle, affecting the normal injection of the material and the continuity of the printing process. Severe blockage may even cause damage to the nozzle, thereby increasing maintenance costs.

[0004] To this end, the present invention provides an indirect 3D printing device and method based on MIM technology feeding. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: an indirect 3D printing device based on MIM technology feeding described in the present invention comprises a printer body, a MIM feeding system, a feeding end and a printing nozzle;

[0007] It also includes a filter plate, which is fixedly installed inside the feeding end and is used to filter the mixture sent out by the MIM feeding system;

[0008] A rotating shaft is rotatably mounted inside the feeding end, a material blocking frame is fixedly mounted on the rotating shaft, a first processing block is arranged inside the material blocking frame, the bottom end of the first processing block is in contact with the top end of the filter plate, the top end of the first processing block is inclined, and a material inlet is opened on the material blocking frame;

[0009] The second processing block is slidably mounted inside the material blocking frame, the bottom end of the second processing block is tilted, and the top end of the first processing block is in contact with the bottom end of the second processing block;

[0010] A power assembly is arranged inside the feeding end and is used to control the rotation of the rotating shaft;

[0011] The control component is arranged inside the feeding end and is used for controlling the sliding of the second processing block inside the feeding end.

[0012] The power assembly includes a driving motor, a driving wheel and a driven wheel. The driving motor is fixedly installed inside the feeding end, the driving wheel is fixedly connected to the output shaft of the driving motor, the driven wheel is fixedly installed on the outer wall of the rotating shaft, and the driving wheel and the driven wheel are connected by a belt.

[0013] The control assembly includes a first slide groove, a second slide groove, a guide groove, a guide rod and a top pressure block. The first slide groove and the second slide groove are both opened inside the feeding end, the first slide groove is located above the second slide groove, and the first slide groove and the second slide groove are connected through the guide groove;

[0014] The guide rod is elastically installed inside the second processing block, the top pressure block is fixedly installed inside the second sliding groove, and one end of the guide rod is inclined.

[0015] A transmission cylinder is fixedly installed on the outer wall of the rotating shaft, a connecting rod is elastically installed inside the transmission cylinder, and one end of the connecting rod is fixedly connected to the first processing block.

[0016] A fixed rod is fixedly installed inside the feeding end, one end of the fixed rod extends to the inside of the rotating shaft and is rotatably connected to the rotating shaft, an end of the connecting rod away from the first processing block is fixedly connected to a conduction rod, one end of the conduction rod extends to the inside of the rotating shaft and is slidably connected, and a protrusion for pressing the conduction rod is fixedly installed on the outer wall of the fixed rod, and a plurality of protrusions are provided, and the plurality of protrusions are arranged in a ring shape on the outer wall of the fixed rod.

[0017] One end of the material blocking frame away from the material inlet is provided with a material penetration plate for the mixture to pass through.

[0018] A placement block is fixedly installed on one end of the material blocking frame away from the material inlet, a rotating rod is rotatably installed inside the placement block, a sliding groove for the rotating rod to rotate is opened on the placement block, a connecting block is rotatably installed on the outer wall of the rotating rod, and a spoiler is fixedly installed on the end of the connecting block away from the rotating rod.

[0019] The rotating rod is rotatably installed inside the placement block through the first torsion spring. One end of the rotating rod extends out of the outer wall of the placement block and is fixedly installed with a transmission gear. A tooth plate group is fixedly installed on the inner wall of the feeding end. The tooth plate group is meshed with the transmission gear. There are multiple tooth plate groups, and the multiple tooth plate groups are arranged in a ring-shaped interval on the inner wall of the feeding end.

[0020] A rotating rod is fixedly installed on the outer wall of the rotating rod, one end of the rotating rod extends to the inside of the connecting block and is connected through a second torsion spring, a transmission block is elastically installed on the outer wall of the connecting block, and a stopper for blocking the transmission block is fixedly installed on the inner wall of the slide groove.

[0021] A method for using an indirect 3D printing device based on MIM technology feeding, the method using the above-mentioned indirect 3D printing device based on MIM technology feeding, comprising the following steps:

[0022] S1: First, the mixture is fed into the feeding end through the MIM feeding system, and the mixture is filtered through the filter plate, and then the rotation of the rotating shaft and the first processing block is controlled by the power component to scrape off the agglomerated mixture on the filter plate;

[0023] S2: Secondly, the first processing block and the second processing block are driven to rotate by the rotating shaft, and the second processing block slides inside the material blocking frame through the control component to press the mixture agglomerates on the first processing block. At the same time, the conducting rod is driven to contact the convex block by the rotating shaft, so that the connecting rod drives the first processing block to slide back and forth inside the material blocking frame to crush the mixture agglomerates;

[0024] S3: Finally, when the rotating shaft drives the material blocking frame to rotate, the transmission gear cooperates with the toothed plate group, so that the rotating rod can drive the spoiler to rotate on one side of the material-permeable plate.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. The indirect 3D printing device and method based on MIM technology feeding described in the present invention drives the material blocking frame to rotate through the rotating shaft, so that the guide rod slides from the first slide groove to the inside of the second slide groove. At this time, the second processing block will also fit with the first processing block. At the same time, when the rotating shaft drives the connecting rod and the conduction rod to rotate around the fixed rod, the first processing block can achieve reciprocating sliding through the cooperation of multiple protrusions and connecting springs, and cooperate with the second processing block to achieve the crushing of the mixture agglomerates, further improving the processing of the mixture agglomerates, so as to ensure the uniformity and fluidity of the feeding, and further improve the 3D printing quality.

[0027] 2. The indirect 3D printing device and method based on MIM technology feeding described in the present invention can push away the mixture behind the transparent plate when the rotating rod rotates, causing a certain negative pressure state to appear at the transparent plate, which is helpful for the mixture inside the material blocking frame to be discharged through the transparent plate. At the same time, the rotation of the spoiler can disturb the mixture behind the transparent plate, which can improve the agglomeration of the crushed mixture and better remix it with the mixture inside the feeding end. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a stereogram in the present invention;

[0030] Figure 2 It is a structural schematic diagram of the feeding end in the present invention;

[0031] Figure 3 The present invention Figure 2 A in the enlarged view;

[0032] Figure 4 It is a structural schematic diagram of the rotating shaft in the present invention;

[0033] Figure 5 The present invention Figure 4 The enlarged view of point B in the figure;

[0034] Figure 6 It is a structural schematic diagram of the fixing rod in the present invention;

[0035] Figure 7 The present invention Figure 6 The enlarged view of point C in the figure;

[0036] Figure 8 It is a structural schematic diagram of the material blocking frame in the present invention;

[0037] Fig. 9 is a schematic structural diagram of the first processing block in the present invention;

[0038] Fig.10 The present invention Fig. 9 The enlarged view of D in the figure;

[0039] Fig.11 It is a schematic diagram of the structure of the spoiler in the present invention;

[0040] Fig.12 The present invention Fig.11 The enlarged view of point E in the figure;

[0041] Fig.13 It is a flow chart of the method in the present invention.

[0042] In the figure: 1. printer body; 2. MIM feeding system; 3. feeding end; 4. rotating shaft; 5. filter plate; 6. material blocking frame; 7. fixing rod; 8. spoiler; 9. placement block; 10. material inlet; 11. first processing block; 12. second processing block; 13. guide rod; 14. material permeable plate; 15. rotating rod; 16. transmission gear; 17. driving motor; 18. driving wheel; 19. driven wheel; 20. tooth plate group; 21. connecting block; 22. top pressure block; 23. first slide groove; 24. second slide groove; 25. guide groove; 26. connecting rod; 27. transmission cylinder; 28. conduction rod; 29. ​​bump; 30. rotating rod; 31. transmission block; 32. stopper. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0044] like Figures 1 to 12 As shown, an indirect 3D printing device based on MIM technology feeding described in an embodiment of the present invention includes a printer body 1, a MIM feeding system 2, a feeding end 3 and a printing nozzle, and the MIM feeding system 2 is internally provided with a mixing mechanism and a conveying mechanism (technical means well known to those skilled in the art, which will not be elaborated here).

[0045] It also includes a filter plate 5, which is fixedly mounted inside the feeding end 3 and is used to filter the mixture sent out by the MIM feeding system 2;

[0046] The filter plate 5 provided can simply filter the mixture output by the MIM feeding system 2, which can effectively improve the continuity of the printing process.

[0047] The rotating shaft 4 is rotatably mounted inside the feeding end 3, and a material blocking frame 6 is fixedly mounted on the rotating shaft 4. A first processing block 11 is arranged inside the material blocking frame 6. The bottom end of the first processing block 11 is in contact with the top end of the filter plate 5, and the top end of the first processing block 11 is inclined. A material inlet 10 is provided on the material blocking frame 6;

[0048] The rotation of the rotating shaft 4 can drive the material blocking frame 6 to rotate in a circle on the filter plate 5. Since the opening position of the feeding port 10 is in the clockwise rotation direction of the material blocking frame 6, when the rotating shaft 4 drives the first processing block 11 to rotate clockwise, the first processing block 11 that is in contact with the surface of the filter plate 5 can shovel up the mixture that cannot pass through the filter plate 5, and as the material blocking frame 6 rotates, the shoveled mixture flows through the feeding port 10 to the inclined surface on the first processing block 11, which can effectively prevent the mixture from agglomerating and blocking the holes on the filter plate 5, thereby affecting the flow rate, thereby further improving the 3D printing quality.

[0049] The second processing block 12 is slidably mounted inside the material blocking frame 6, the bottom end of the second processing block 12 is tilted, and the top end of the first processing block 11 is in contact with the bottom end of the second processing block 12;

[0050] A return spring is provided between the second processing block 12 and the first processing block 11 . In order to reduce the gap between the first processing block 11 and the second processing block 12 , the return spring can be provided between the second processing block 12 and the material blocking frame 6 .

[0051] The first processing block 11 and the second processing block 12 are of the same size, and the inclined portions of the first processing block 11 and the second processing block 12 correspond to each other. Therefore, when the second processing block 12 slides toward the first processing block 11 inside the material blocking frame 6 until it fits with the first processing block 11, the mixture agglomerates retained on the surface of the first processing block 11 can be fractured. After fracturing, they will be re-mixed with the mixture inside the feeding end 3 for use, which not only achieves the processing of the agglomerates of the mixture, but also reduces the problem of the mixture being unusable due to agglomerations.

[0052] The power assembly is arranged inside the feeding end 3 and is used to control the rotation of the rotating shaft 4. The rotating shaft 4 can be controlled to drive the feeding end 3 to rotate through the arranged power assembly.

[0053] The control component is arranged inside the feeding end 3 and is used to control the sliding of the second processing block 12 inside the feeding end 3. Through the arranged control component, the second processing block 12 can be driven to slide up or down inside the feeding end 3. When the second processing block 12 slides down, it will fit with the first processing block 11. When the second processing block 12 slides up, it will separate from the first processing block 11.

[0054] As a preferred embodiment of the present invention, the power assembly includes a driving motor 17, a driving wheel 18 and a driven wheel 19. The driving motor 17 is fixedly installed inside the feeding end 3, the driving wheel 18 is fixedly connected to the output shaft of the driving motor 17, and the driven wheel 19 is fixedly installed on the outer wall of the rotating shaft 4. The driving wheel 18 and the driven wheel 19 are connected by a belt.

[0055] The driving wheel 18 can be driven to rotate by starting the driving motor 17 , and the driven wheel 19 can be driven to rotate by the setting of the belt, so the rotation of the rotating shaft 4 can be controlled.

[0056] As a preferred embodiment of the present invention, the control assembly includes a first chute 23, a second chute 24, a guide groove 25, a guide rod 13 and a top pressure block 22, the first chute 23 and the second chute 24 are both opened inside the feeding end 3, the first chute 23 is located above the second chute 24, and the first chute 23 and the second chute 24 are connected through the guide groove 25;

[0057] The guide rod 13 is elastically installed inside the second processing block 12 , the pressing block 22 is fixedly installed inside the second slide groove 24 , and one end of the guide rod 13 is inclined.

[0058] The first slide groove 23 and the second slide groove 24 are both annular grooves, and the guide groove 25 is an inclined groove for connecting the first slide groove 23 and the second slide groove 24, and the first slide groove 23, the second slide groove 24 and the guide groove 25 can all allow the guide rod 13 to slide.

[0059] A pressure spring is arranged between the guide rod 13 and the interior of the second processing block 12, and the setting of the pressure spring can ensure that the guide rod 13 is always located on the outer wall of the second processing block 12, and the clockwise rotating end of the guide rod 13 is inclined, so when the second processing block 12 drives the guide rod 13 to rotate clockwise, it is blocked and the guide rod 13 can be pushed into the interior of the second processing block 12.

[0060] The second processing block 12 has two states in the material blocking frame 6. In the first state, the second processing block 12 is above the material blocking frame 6 and separated from the first processing block 11. At this time, the guide rod 13 provided on the second processing block 12 is located inside the first slide groove 23.

[0061] The second state is that the second processing block 12 is located below the material blocking frame 6 and fits with the first processing block 11 . At this time, the guide rod 13 provided on the second processing block 12 is located inside the second slide groove 24 .

[0062] When the rotating shaft 4 drives the material blocking frame 6 to rotate, if the second processing block 12 is in the first state, the guide rod 13 can slide from the inside of the first slide groove 23 to the inside of the guide groove 25. Through the setting of the guide groove 25, the guide rod 13 will drive the second processing block 12 to slide downward until the guide rod 13 slides to the inside of the second slide groove 24. At this time, the second processing block 12 will also fit with the first processing block 11, and the mixture agglomerate on the first processing block 11 can be fractured.

[0063] As the rotating shaft 4 continues to rotate, until the guide rod 13 rotates clockwise inside the second sliding groove 24 and contacts the pressing block 22, the pressing block 22 presses the inclined surface of the guide rod 13 to push the guide rod 13 from the inside of the second sliding groove 24 into the inside of the second processing block 12. At this time, the second processing block 12 can be pushed upward by the action of the return spring, so that the guide rod 13 enters the inside of the first sliding groove 23, and the second processing block 12 is separated from the first processing block 11. The above-mentioned cooperation can only be performed when the rotating shaft 4 rotates clockwise.

[0064] The position of the pressing block 22 corresponds to the position of the guide groove 25 , so when the guide rod 13 drives the second processing block 12 to rotate 180 degrees clockwise, the current state can be switched.

[0065] When the material blocking frame 6 rotates 180 degrees, the first processing block 11 and the second processing block 12 are attached to each other, and when it rotates another 180 degrees, the first processing block 11 and the second processing block 12 are separated.

[0066] As a preferred embodiment of the present invention, a transmission cylinder 27 is fixedly mounted on the outer wall of the rotating shaft 4 , a connecting rod 26 is elastically mounted inside the transmission cylinder 27 , and one end of the connecting rod 26 is fixedly connected to the first processing block 11 .

[0067] A connecting spring is provided between the connecting rod 26 and the transmission cylinder 27, so when the connecting rod 26 slides inside the transmission cylinder 27, it can drive the first processing block 11 to slide at the same time. When the second processing block 12 is fitted with the first processing block 11, the first processing block 11 can slide back and forth left and right to crush the mixture clumps between the second processing block 12 and the first processing block 11, thereby further improving the effect of crushing the mixture clumps.

[0068] As a preferred embodiment of the present invention, a fixing rod 7 is fixedly installed inside the feeding end 3, one end of the fixing rod 7 extends to the inside of the rotating shaft 4 and is rotatably connected to the rotating shaft 4, and one end of the connecting rod 26 away from the first processing block 11 is fixedly connected to a conduction rod 28, one end of the conduction rod 28 extends to the inside of the rotating shaft 4 and is slidably connected, and a protrusion 29 for pressing the conduction rod 28 is fixedly installed on the outer wall of the fixing rod 7, and a plurality of protrusions 29 are provided, and the plurality of protrusions 29 are arranged in a ring shape on the outer wall of the fixing rod 7.

[0069] When the rotating shaft 4 rotates, it will not affect the fixed rod 7, so the rotating shaft 4 can rotate around the fixed rod 7. The connecting spring arranged inside the transmission cylinder 27 can keep the transmission rod 28 pressing toward the protrusion 29. When the rotating shaft 4 drives the transmission cylinder 27, the connecting rod 26 and the transmission rod 28 to rotate around the fixed rod 7, the transmission rod 28 will slide along the outer walls of the multiple protrusions 29, slide between the two protrusions 29 through the transmission rod 28, and then slide to the outermost end of the protrusion 29. During this period, the transmission rod 28 cooperates with the connecting spring to enable the first processing block 11 to achieve reciprocating sliding, and cooperate with the second processing block 12 to achieve crushing of the mixture agglomeration.

[0070] As a preferred embodiment of the present invention, a material-permeable plate 14 for the mixture to pass through is provided at one end of the material-blocking frame 6 away from the material inlet 10 .

[0071] When the material blocking frame 6 is driven to rotate, as long as the mixture agglomerates on the first processing block 11 are crushed, they can re-enter the interior of the feeding end 3 through the material penetration plate 14 and be re-mixed with the material inside the feeding end 3 .

[0072] As a preferred embodiment of the present invention, a placing block 9 is fixedly installed on one end of the material blocking frame 6 away from the material inlet 10, a rotating rod 15 is rotatably installed inside the placing block 9, a sliding groove for the rotating rod 15 to rotate is provided on the placing block 9, a connecting block 21 is rotatably installed on the outer wall of the rotating rod 15, and a spoiler 8 is fixedly installed on the end of the connecting block 21 away from the rotating rod 15.

[0073] When the rotating rod 15 rotates, the spoiler 8 can be driven to rotate under the action of the connecting block 21. The spoiler 8 is arranged at the other end of the transparent plate 14. When the spoiler 8 rotates in the direction away from the transparent plate 14, the mixture behind the transparent plate 14 can be pushed away, so that a certain negative pressure state can be generated at the transparent plate 14, which is helpful for the mixture inside the material blocking frame 6 to be discharged through the transparent plate 14. At the same time, through the rotation of the spoiler 8, the mixture behind the transparent plate 14 can be disturbed, which can improve the agglomeration of the crushed mixture and better remix it with the mixture inside the feeding end 3.

[0074] As a preferred embodiment of the present invention, the rotating rod 15 is rotatably installed inside the placement block 9 through a first torsion spring, one end of the rotating rod 15 extends out of the outer wall of the placement block 9 and is fixedly installed with a transmission gear 16, and a tooth plate group 20 is fixedly installed on the inner wall of the feeding end 3, the tooth plate group 20 is meshed with the transmission gear 16, and a plurality of tooth plate groups 20 are provided, and the plurality of tooth plate groups 20 are arranged in a ring-shaped interval on the inner wall of the feeding end 3.

[0075] Each set of toothed plate groups 20 can make the transmission gear 16 rotate 90 degrees. When the rotating shaft 4 drives the material blocking frame 6 to rotate, the transmission gear 16 is engaged with the toothed plate group 20, and the spoiler 8 is controlled to rotate 90 degrees in the direction away from the material blocking frame 6. At this time, the first torsion spring connected to the rotating rod 15 can be deformed and store elastic potential energy. When the transmission gear 16 rotates to the gap between the two toothed plate groups 20, the first torsion spring will release the elastic potential energy, and drive the transmission gear 16 to reset through the rotating rod 15, so that the spoiler 8 slides toward the direction of the material blocking frame 6.

[0076] The tooth plate group 20 is half set inside the feeding end 3, so that when the guide rod 13 drives the second processing block 12 to be located inside the first slide groove 23, the spoiler 8 can swing back and forth. When the guide rod 13 drives the second processing block 12 to be located in the second slide groove 24, the spoiler 8 will not swing.

[0077] As a preferred embodiment of the present invention, a rotating rod 30 is fixedly installed on the outer wall of the rotating rod 15, one end of the rotating rod 30 extends to the interior of the connecting block 21 and is connected through a second torsion spring, a transmission block 31 is elastically installed on the outer wall of the connecting block 21, and a stopper 32 for blocking the transmission block 31 is fixedly installed on the inner wall of the slide groove.

[0078] When the rotating rod 15 drives the connecting block 21 and the spoiler 8 to slide in the direction away from the material blocking frame 6, the transmission block 31 arranged on the connecting block 21 will contact the stop block 32 in the slide groove. Through the obstruction of the stop block 32, the elastically arranged transmission block 31 can be pushed into the interior of the connecting block 21, so the connecting block 21 will not be transmitted. At this time, the spoiler 8 will also rotate in a vertical state to maximize the spoiler effect.

[0079] When the spoiler 8 slides toward the material blocking frame 6, the transmission block 31 will be blocked by the stop block 32. At this time, the transmission block 31 will not rotate due to the obstruction of the stop block 32. Therefore, as the rotating rod 15 rotates, the connecting block 21 can be driven to rotate on the outer wall of the rotating rod 30, so that the second torsion spring is deformed and elastic potential energy is stored. At the same time, the connecting block 21 will also drive the spoiler 8 to rotate 90 degrees, so that it can be rotated horizontally and reset. In this way, when the spoiler 8 is reset, the turbulence can be reduced, thereby affecting the discharge of the mixture inside the material blocking frame 6.

[0080] like Fig.13 As shown, a method for using an indirect 3D printing device based on MIM technology feeding, the method adopts the above-mentioned indirect 3D printing device based on MIM technology feeding, and includes the following steps:

[0081] S1: First, the mixture is fed into the feeding end 3 through the MIM feeding system 2, and the mixture is filtered through the filter plate 5, and then the rotation of the rotating shaft 4 and the first processing block 11 is controlled by the power component to scrape off the agglomerated mixture on the filter plate 5;

[0082] S2: Secondly, the first processing block 11 and the second processing block 12 are driven to rotate by the rotating shaft 4, and the second processing block 12 slides inside the material blocking frame 6 through the control component to press the mixture agglomerates on the first processing block 11. At the same time, the conducting rod 28 is driven by the rotating shaft 4 to contact the protrusion 29, so that the connecting rod 26 drives the first processing block 11 to slide back and forth inside the material blocking frame 6 to crush the mixture agglomerates;

[0083] S3: Finally, when the rotating shaft 4 drives the material blocking frame 6 to rotate, the transmission gear 16 cooperates with the toothed plate set 20, so that the rotating rod 15 can drive the spoiler 8 to rotate on one side of the material-permeable plate 14.

[0084] Working principle: The rotation of the rotating shaft 4 can drive the material blocking frame 6 to rotate in a circle on the filter plate 5. Since the opening position of the feeding port 10 is in the clockwise rotation direction of the material blocking frame 6, when the rotating shaft 4 drives the first processing block 11 to rotate clockwise, the first processing block 11 that is in contact with the surface of the filter plate 5 can shovel up the mixture that cannot pass through the filter plate 5, and as the material blocking frame 6 rotates, the shoveled mixture flows through the feeding port 10 to the inclined surface on the first processing block 11, which can effectively prevent the mixture from agglomerating and blocking the holes on the filter plate 5, thereby affecting the flow rate, and further improving the 3D printing quality.

[0085] When the rotating shaft 4 drives the material blocking frame 6 to rotate, if the second processing block 12 is in the first state, the guide rod 13 can slide from the inside of the first slide groove 23 to the inside of the guide groove 25. Through the setting of the guide groove 25, the guide rod 13 will drive the second processing block 12 to slide downward until the guide rod 13 slides to the inside of the second slide groove 24. At this time, the second processing block 12 will also fit with the first processing block 11, and the mixture agglomerates on the first processing block 11 can be fractured. At the same time, when the rotating shaft 4 drives the transmission cylinder 27, the connecting rod 26 and the transmission rod 28 to rotate around the fixed rod 7, the transmission rod 28 will slide along the outer walls of the multiple protrusions 29, slide between the two protrusions 29 through the transmission rod 28, and then slide to the outermost end of the protrusion 29. During this period, the transmission rod 28 cooperates with the connecting spring to enable the first processing block 11 to achieve reciprocating sliding, and cooperate with the second processing block 12 to achieve crushing of the mixture agglomerates.

[0086] By rotating the rotating rod 15, the spoiler 8 can be driven to rotate under the action of the connecting block 21. The spoiler 8 is arranged at the other end of the transparent plate 14. When the spoiler 8 rotates in the direction away from the transparent plate 14, the mixture behind the transparent plate 14 can be pushed away, so that a certain negative pressure state appears at the transparent plate 14, which is helpful for the mixture inside the material blocking frame 6 to be discharged through the transparent plate 14. At the same time, through the rotation of the spoiler 8, the mixture behind the transparent plate 14 can be disturbed, which can improve the agglomeration of the crushed mixture and better re-mix it with the mixture inside the feeding end 3.

[0087] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0088] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0089] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An indirect 3D printing device based on MIM technology feeding, comprising a printer body (1), a MIM feeding system (2), a feeding end (3) and a printing nozzle; Features: It also includes a filter plate (5), which is fixedly mounted inside the feeding end (3) and is used to filter the mixture delivered by the MIM feeding system (2); A rotating shaft (4) is rotatably mounted inside the feeding end (3); a material blocking frame (6) is fixedly mounted on the rotating shaft (4); a first processing block (11) is arranged inside the material blocking frame (6); the bottom end of the first processing block (11) is in contact with the top end of the filter plate (5); the top end of the first processing block (11) is inclined; and a material inlet (10) is provided on the material blocking frame (6); A second processing block (12) is slidably mounted inside the material blocking frame (6), the bottom end of the second processing block (12) being tilted, and the top end of the first processing block (11) being in contact with the bottom end of the second processing block (12); A power assembly, arranged inside the feeding end (3), and used to control the rotation of the rotating shaft (4); a control assembly, arranged inside the feeding end (3), for controlling the sliding of the second processing block (12) inside the feeding end (3); the power assembly comprising a driving motor (17), a driving wheel (18) and a driven wheel (19); the driving motor (17) is fixedly mounted inside the feeding end (3); the driving wheel (18) is fixedly connected to the output shaft of the driving motor (17); the driven wheel (19) is fixedly mounted on the outer wall of the rotating shaft (4); and the driving wheel (18) and the driven wheel (19) are connected via a belt; The control assembly comprises a first slide groove (23), a second slide groove (24), a guide groove (25), a guide rod (13) and a top pressure block (22), wherein the first slide groove (23) and the second slide groove (24) are both arranged inside the feeding end (3), the first slide groove (23) is located above the second slide groove (24), and the first slide groove (23) and the second slide groove (24) are connected via the guide groove (25); The guide rod (13) is elastically mounted inside the second processing block (12), the top pressure block (22) is fixedly mounted inside the second slide groove (24), and one end of the guide rod (13) is tilted.

2. According to claim 1, an indirect 3D printing device based on MIM technology feeding, characterized in that: A transmission cylinder (27) is fixedly mounted on the outer wall of the rotating shaft (4), a connecting rod (26) is elastically mounted inside the transmission cylinder (27), and one end of the connecting rod (26) is fixedly connected to the first processing block (11).

3. The indirect 3D printing device based on MIM technology feeding according to claim 2, characterized in that: A fixing rod (7) is fixedly mounted inside the feeding end (3), one end of the fixing rod (7) extends into the interior of the rotating shaft (4) and is rotatably connected to the rotating shaft (4), one end of the connecting rod (26) away from the first processing block (11) is fixedly connected to a conducting rod (28), one end of the conducting rod (28) extends into the interior of the rotating shaft (4) and is slidably connected, and a protrusion (29) for pressing the conducting rod (28) is fixedly mounted on the outer wall of the fixing rod (7), and a plurality of the protrusions (29) are provided, and the plurality of protrusions (29) are arranged in a ring shape on the outer wall of the fixing rod (7).

4. The indirect 3D printing device based on MIM technology feeding according to claim 3, characterized in that: A material-permeable plate (14) for the mixture to pass through is provided at one end of the material-blocking frame (6) away from the material inlet (10).

5. The indirect 3D printing device based on MIM technology feeding according to claim 4, characterized in that: A placement block (9) is fixedly mounted on one end of the material blocking frame (6) away from the material inlet (10); a rotating rod (15) is rotatably mounted inside the placement block (9); a sliding groove for the rotating rod (15) to rotate is provided on the placement block (9); a connecting block (21) is rotatably mounted on the outer wall of the rotating rod (15); and a spoiler (8) is fixedly mounted on one end of the connecting block (21) away from the rotating rod (15).

6. The indirect 3D printing device based on MIM technology feeding according to claim 5, characterized in that: The rotating rod (15) is rotatably mounted inside the placement block (9) via a first torsion spring; one end of the rotating rod (15) extends out of the outer wall of the placement block (9) and is fixedly mounted with a transmission gear (16); a tooth plate group (20) is fixedly mounted on the inner wall of the feeding end (3); the tooth plate group (20) is meshed with the transmission gear (16); a plurality of tooth plate groups (20) are provided, and the plurality of tooth plate groups (20) are arranged in a ring-shaped manner at intervals on the inner wall of the feeding end (3).

7. The indirect 3D printing device based on MIM technology feeding according to claim 6, characterized in that: A rotating rod (30) is fixedly mounted on the outer wall of the rotating rod (15); one end of the rotating rod (30) extends into the interior of the connecting block (21) and is connected via a second torsion spring; a transmission block (31) is elastically mounted on the outer wall of the connecting block (21); and a stopper (32) for blocking the transmission block (31) is fixedly mounted on the inner wall of the sliding groove.

8. A method for using an indirect 3D printing device based on MIM technology feeding, the method using the indirect 3D printing device based on MIM technology feeding as claimed in claim 7, characterized in that: The following steps are involved: S1: First, the mixture is fed into the feeding end (3) through the MIM feeding system (2), the mixture is filtered through the filter plate (5), and then the rotation of the rotating shaft (4) and the first processing block (11) is controlled by the power component to scrape off the mixture agglomerated on the filter plate (5); S2: Secondly, the first processing block (11) and the second processing block (12) are driven to rotate by the rotating shaft (4), and the second processing block (12) slides inside the material blocking frame (6) through the control component to press the mixture agglomerates on the first processing block (11). At the same time, the conducting rod (28) is driven by the rotating shaft (4) to contact the protrusion (29), so that the connecting rod (26) drives the first processing block (11) to slide back and forth inside the material blocking frame (6) to crush the mixture agglomerates; S3: Finally, when the rotating shaft (4) drives the material blocking frame (6) to rotate, the transmission gear (16) cooperates with the toothed plate group (20), so that the rotating rod (15) can drive the spoiler (8) to rotate on one side of the material penetration plate (14).

Images