Sintering and curing device and method for preparing graphene copper-based composite material

Abstract

The invention relates to the field of metal printers, in particular to a sintering and curing device and method for preparing a graphene copper-based composite material, and the device comprises a shell, a material passing pipe, a transparent adapter pipe, a temporary storage bin, a diffusion blanking nozzle and a feeding pipe, and further comprises a sealing plate and a piston, a one-way breathable adhesive film is arranged at the bottom of the material passing pipe, and a grating sensor is arranged on the outer side of the transparent adapter pipe; a material distributing fan blade is arranged in the temporary storage bin in a coupling mode, a cylindrical containing cavity used for containing the material distributing fan blade is formed in the temporary storage bin, and a driving mechanism is further arranged on the side of the temporary storage bin. The material distributing plate and the piston negative pressure structure are innovatively arranged in the discharging pipe, powder in the discharging pipe can be evenly conveyed at a constant speed, the efficiency of equipment is greatly improved, the reliability of the equipment is improved, the material distributing fan blades and the double-spiral material conveying shaft are driven at the same time through the driving structure, the cost is reduced, and meanwhile the size of the equipment is reduced.

Description

Technical Field

[0001] The invention relates to the field of metal printers, and in particular to a device and method for preparing, sintering and curing a graphene copper-based composite material. Background Art

[0002] Selective laser melting (SLM) technology is one of the most widely used processes for metal powder printers. It selectively melts metal powder through a high-energy laser beam, and accumulates it layer by layer into a dense solid structure, which can print complex and fine physical shapes. In addition, directed energy deposition, material extrusion, binder jetting and other processes are also constantly developing and applying.

[0003] The price of copper-based metal powder printers is relatively high, the investment cost is large, and the cost of metal powder materials is not low. For some small enterprises and start-ups, there may be certain financial pressures, which limits their ability to adopt metal powder printing technology. The quality control of metal powder printing technology is relatively complex, involving parameter optimization, material property stability, machine calibration and other factors. Ensuring the quality and consistency of printed parts is a challenge, especially for industries with high precision and high reliability requirements. Summary of the invention

[0004] Based on this, it is necessary to provide a sintering and curing device and method for preparing graphene copper-based composite materials in response to the existing technical problems, so as to achieve a uniform and controllable discharge speed of the graphene copper-based composite material preparation equipment, reduce costs and increase efficiency.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0006] The device and method for preparing sintering and curing graphene copper-based composite materials are characterized in that they include an outer shell and a feeding pipe, a transparent transfer pipe, a temporary storage bin and a diffusion drop nozzle arranged on the inner side of the outer shell in sequence from top to bottom, a feeding pipe that can be inserted inwardly into the feeding pipe is provided on the top of the outer shell, a sealing plate for elastically sealing the lower end of the feeding end upward is provided in the feeding pipe, a cylindrical tube connected to the inner side of the feeding pipe is transversely provided on the tube wall of the feeding pipe, a piston capable of reciprocating movement is provided in the cylindrical tube, the sealing plate is located at the height of the piston, the sealing plate is axially connected to the inner side of the feeding pipe, and the sealing plate The free end is arranged in the direction of the cylindrical tube, a one-way breathable adhesive film is arranged at the bottom of the feeding tube, a grating sensor for detecting the filling degree of powder is arranged on the outer side of the transparent adapter tube, a dividing fan blade with a horizontal axis is axially arranged in the temporary storage bin, a cylindrical accommodating cavity for accommodating the dividing fan blade is formed in the temporary storage bin, the outer edge of the dividing fan blade is slidably fitted on the inner wall of the cylindrical accommodating cavity, the cylindrical accommodating cavity is connected to the transparent adapter tube upwards, and is connected to the diffusion blanking nozzle downwards, and a driving mechanism for synchronously driving the dividing fan blade and the diffusion blanking nozzle is also arranged on the side of the temporary storage bin.

[0007] Furthermore, it is characterized in that an elastic part is provided inside the feeding tube, a rectangular cross-section section is formed in the middle of the feeding tube, one end of the elastic part is fitted to the upper part of the sealing plate, and a limiting fitting plate is formed inside the feeding tube to fit the upper part of the sealing plate.

[0008] Furthermore, it is characterized in that the elastic part is a metal elastic bent sheet, a first embedding groove for fixing the metal elastic bent sheet is formed on the rectangular cross-section section in the feeding tube, an inclined baffle is formed on the upper part of the feeding tube to fit the upper part of the sealing plate, and a card groove is formed on the upper part of the sealing plate to fit the metal elastic bent sheet.

[0009] Furthermore, it is characterized in that a first motor, a crank, a connecting rod and a sealing ring are provided next to the feeding pipe, the first motor is vertically fixed on a clamping member formed by the shell, a crank is rotatably fixed on the upper part of the motor shaft, the connecting rod far from the piston end is connected to the crank, the opposite end of the connecting rod is connected to the piston, an annular groove is provided on the outer wall of the piston, the sealing ring fits in the annular groove, and Teflon coating is evenly applied on the outer wall of the piston and the inside of the cylindrical tube.

[0010] Furthermore, it is characterized in that a cylindrical plug shaft is formed at the distal axial end of the crank, an elastic gap is provided in the middle of the cylindrical plug shaft for the plug piece to be pressed tightly, an anti-slip flange is formed at the upper part of the cylindrical plug shaft, the distal piston end of the connecting rod is fixedly connected to the crank through the cylindrical plug shaft, the upper part of the connecting rod fits the anti-slip flange, an elastic clamping ring is formed at the distal end of the piston far from the material tube, a short shaft is formed at the proximal piston end of the connecting rod, and the connecting rod short shaft is vertically inserted in the elastic clamping ring.

[0011] Furthermore, it is characterized in that the material dividing fan blade is horizontally installed in the temporary storage bin and is coaxially arranged with the cylindrical accommodating cavity, and also includes a first bearing, which is horizontally arranged in the temporary storage bin, and the first bearing is arranged at the end of the material dividing fan blade shaft, and the opening between two adjacent blades of the material dividing fan blade is larger than the diameter of the upper drop-out port, and smaller than the diameter of the lower discharge port.

[0012] Further, it is characterized in that the diffusion blanking nozzle includes a flat nozzle, a double-rotation spiral shaft, a second bearing, and an arc-shaped grille bottom plate. A connecting pipe vertically connected to the temporary storage bin is arranged in the middle of the flat nozzle. A cylindrical bin is formed inside the flat nozzle. The double-rotation spiral shaft is horizontally arranged in the cylindrical bin and is coaxial with the cylindrical bin. The second bearing is arranged at both ends of the double-rotation spiral shaft. The arc-shaped grille bottom plate is inserted into the flat nozzle along the axial direction of the cylindrical bin. The arc-shaped grille bottom plate is installed directly below the double-rotation spiral shaft. The flat nozzle is fixed on a clamping piece formed on the inner wall of the outer shell.

[0013] Further, it is characterized in that the driving mechanism includes a second motor, a coupling, a rotating shaft, a first gear, a second gear, a first toothed disc, and a second toothed disc. The second motor is vertically fixed on a clamping member formed on the shell. The rotating shaft is connected to the rotating shaft of the second motor through a coupling. The first gear and the second gear are coaxially fixed on the rotating shaft in sequence. The first toothed disc is fixed to the far blade end of the material distribution blade shaft. The second toothed disc is fixed to one end of the double-helix spiral shaft. The first gear is meshed with the first toothed disc, and the second gear is meshed with the second toothed disc. The first gear and the second gear have the same tooth ratio, and the first toothed disc has a larger tooth ratio than the second toothed disc. The first gear, the second gear, the first toothed disc, and the second toothed disc are all fixed in a clamping member formed on the inner wall of the shell.

[0014] Furthermore, it is characterized in that the first gear and the second gear have the same gear ratio, and the first sprocket has a greater gear ratio than the second sprocket.

[0015] Furthermore, it is characterized in that the grating sensor includes a transmitting plate, a receiving plate, and studs. The transmitting plate and the receiving plate are fixed to both sides of the transparent transfer tube through studs and screws. The transmitting plate and the receiving plate are vertically fixed to the clamping parts formed on the inner wall of the shell.

[0016] A method for preparing a graphene copper-based composite material by sintering and curing is also provided, comprising the following steps:

[0017] S1, the powder falls into the feeding pipe through the feeding pipe, encounters the obstruction of the sealing plate, and accumulates on the upper part of the sealing plate;

[0018] S2, when the piston in the cylindrical tube is pulled toward one end of the feeding tube, negative pressure is generated, pulling the sealing plate and the inner wall of the feeding tube to form a gap, and the powder is drawn into the cylindrical tube. When the piston is pushed toward one end of the feeding tube, the sealing plate rotates upward, the gap between the sealing plate and the feeding tube is blocked, and the powder is pushed into the feeding tube and the lower part of the sealing plate.

[0019] S3, due to the effect of the one-way breathable film, the powder cannot be drawn back into the cylindrical tube by the negative pressure, and falls into the transparent transfer tube through the one-way breathable film.

[0020] S4, when the powder passes through the transparent transfer tube, it is monitored by the grating sensor and falls into the temporary storage box. The driving mechanism drives the dividing blades to rotate in the cylindrical accommodating cavity, and the powder is evenly stored between the two blades. When the dividing blades rotate to the lower part of the temporary storage box, it is thrown into the diffusion nozzle below the temporary storage box and discharged through the diffusion nozzle.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] First, the present invention combines a metal elastic bending sheet, a sealing plate mechanism and a piston negative pressure structure to add powder into the feeding pipe, thereby making the powder controllable and uniform during the discharge process.

[0023] Secondly, the double-spinning screw shaft used in the present invention can be even, so that the powder can be discharged evenly through the flat mouth, thereby improving the discharge stability and making the discharge controllable.

[0024] Thirdly, the driving structure drives the material distribution fan blades and the double-rotation spiral shaft at the same time, which not only achieves the effect of material distribution and flow disturbance, but also saves costs and reduces the size of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of a sintering and curing device for preparing a graphene copper-based composite material;

[0026] Figure 2 It is a side view of a sintering and curing device for preparing a graphene copper-based composite material;

[0027] Figure 3 It is a front view of a sintering and curing device for preparing a graphene copper-based composite material without the outer shell;

[0028] Figure 4 yes Figure 2 Structural cross-section view at AA in the middle;

[0029] Figure 5 It is a top view of a sintering and curing device for preparing a graphene copper-based composite material;

[0030] Figure 6 yes Figure 3 Structural cross-section view at the middle BB;

[0031] Figure 7 yes Figure 3 A magnified view of the structure at C in the middle;

[0032] Figure 8 yes Figure 4 A magnified view of the structure at D in the middle;

[0033] Fig. 9 Yes Figure 4 The enlarged view of the three-dimensional structure at C in the middle;

[0034] Fig.10 yes Figure 4 Enlarged view of the structure at E in the middle;

[0035] The numbers in the figure are: 1, housing; 2, feed pipe; 3, feed pipe; 4, sealing plate; 5, elastic member; 6, laminating plate; 7, rectangular cross-section section; 8, inclined baffle; 9, clamping groove; 10, first embedded groove; 11, cylindrical tube; 12, piston; 13, sealing ring; 14, elastic clamping ring; 15, connecting rod; 16, crank; 17, cylindrical plug shaft; 18, anti-slip flange; 19, elastic gap; 20, fastening member; 21, one-way breathable film; 22, first motor; 23, annular embedded groove; 24, transparent transfer tube; 25. Temporary storage bin; 26. Material distribution fan blades; 27. Cylindrical accommodating chamber; 28. First bearing; 29. ​​Diffusion blanking nozzle; 30. Double-spindle spiral shaft; 31. Arc-shaped grille bottom plate; 32. Second bearing; 33. Flat nozzle; 34. Cylindrical bin; 35. Grating sensor; 36. Transmitting plate; 37. Receiving plate; 38. Stud; 39. Driving mechanism; 40. First gear; 41. First toothed disc; 42. Second gear; 43. Second toothed disc; 44. Coupling; 45. Rotating shaft; 46. Second motor. DETAILED DESCRIPTION

[0036] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Figures 1 to 10, a graphene copper-based composite material preparation sintering and curing device, comprising a shell 1 and a feeding pipe 3, a transparent transfer pipe 24, a temporary storage bin 25 and a diffusion drop nozzle 29 arranged on the inner side of the shell 1 from top to bottom in sequence, the top of the shell 1 is provided with a feeding pipe 2 that can be inserted inwardly into the feeding pipe 3, the feeding pipe 3 is provided with a sealing plate 4 for elastically blocking the lower end of the feeding end upward, a cylindrical tube 11 connected to the inner side of the feeding pipe 3 is horizontally arranged on the tube wall of the feeding pipe 3, and a movable The plug 12, the sealing plate 4 is located at the height of the piston 12, the sealing plate 4 is axially arranged on the inner side of the feeding pipe 3, the free end of the sealing plate 4 is arranged in the direction of the cylindrical tube 11, the bottom of the feeding pipe 3 is provided with a one-way breathable adhesive film 21, the outer side of the transparent transfer tube 24 is provided with a grating sensor 35 for detecting the filling degree of the powder, the temporary storage bin 25 is axially arranged with a material distribution fan blade 26 with a horizontal axis, and the temporary storage bin 25 is formed with a cylindrical accommodating cavity 27 (such as Fig.10 As shown), the outer edge of the distribution blade 26 slides in contact with the inner wall of the cylindrical accommodating chamber 27, and the cylindrical accommodating chamber 27 is connected to the transparent transfer tube 24 upward and to the diffusion nozzle 29 downward. A driving mechanism 39 for synchronously driving the distribution blade 26 and the diffusion nozzle 29 is also provided on the side of the temporary storage bin 25.

[0037] The present invention realizes the precise, controllable and uniform discharge of graphene copper-based composite material preparation equipment through structural improvement. Specifically, when the powder enters the feeding tube 3 through the feeding tube 2 and accumulates on the upper part of the sealing plate 4, when the piston 12 performs reciprocating linear motion in the cylindrical tube 11 and reaches the end far from the feeding tube 3, the sealing plate 4 in the feeding tube 3 forms a gap with the inner wall of the cylindrical tube 11 due to the negative pressure, thereby extracting the powder accumulated on the sealing plate 4 into the cylindrical tube 11. When the piston 12 reaches the end near the feeding tube 3, the powder in the cylindrical tube 11 is pushed to the lower part of the feeding tube 3 and is discharged through the one-way permeable The aerogel film 21 falls into the transparent transfer tube 24. When the grating sensors 35 on both sides of the transparent transfer tube 24 detect that the powder filling degree reaches the requirement, the driving mechanism 39 beside the temporary storage bin 25 drives the material distribution fan 26 to discharge the material evenly, accurately and controllably through the diffusion nozzle 29; the one-way air-permeable film 21 has a one-way check function and is arranged at the bottom of the feeding tube 3 to prevent the powder from being drawn back into the tube due to the negative pressure caused by the reciprocating linear motion of the piston 12 in the cylindrical tube 11;

[0038] The driving mechanism 39 drives the material distributing blades 26, and the outer edges of the material distributing blades 26 rotate in contact with the inner wall of the cylindrical accommodating chamber 27, so that the powder can be controlled and uniform during the discharging process.

[0039] In order to realize the function of elastically blocking the powder upward, the following features are specifically set:

[0040] An elastic member 5 is provided inside the feeding tube 3, a rectangular cross-section section 7 is formed in the middle of the feeding tube 3, one end of the elastic member 5 is fitted to the upper part of the sealing plate 4, and a limiting fitting plate 6 that fits the upper part of the sealing plate 4 is formed inside the feeding tube 3. The movable end of the elastic member 5 pulls the upper part of the sealing plate 4. When the upper part of the sealing plate 4 rotates upward, the upper part of the sealing plate 4 fits the fitting plate 6 formed inside the feeding tube 3, thereby achieving the function of elastically sealing the powder upward.

[0041] In order to realize that the movable end of the sealing plate 4 can be opened and closed flexibly when the piston 12 draws materials, and no redundant powder is accumulated in the gap of the sealing plate 4, the following features are specifically set:

[0042] The elastic member 5 is a metal elastic curved sheet, and a first embedding groove 10 for fixing the metal elastic curved sheet is formed on the rectangular cross-section section 7 in the feeding tube 3. The upper part of the feeding tube 3 is formed with an inclined baffle 8 that fits the upper part of the sealing plate 4, and the upper part of the sealing plate 4 is formed with a slot 9 that fits the metal elastic curved sheet. When the powder falls onto the sealing plate 4 through the feeding tube 2, the powder cannot be accumulated in the gap between the sealing plate 4 and the elastic member 5 due to the obstruction of the inclined baffle 8 formed on the upper part of the feeding tube 3. When the piston 12 is pulled away from the end of the feeding tube 3, the metal elastic curved sheet will be pulled downward due to the negative pressure, thereby generating a gap with the inner wall of the rectangular cross-section section 7 in the feeding tube 3. When the piston 12 is pushed close to the end of the feeding tube 3, the sealing plate 4 will be pulled upward due to the negative pressure and the elastic action of the elastic member 5, and the sealing plate 4 fits the fitting plate 6 formed inside the feeding tube 3 to reach the limiting effect, thereby realizing the flexible opening and closing of the sealing plate 4 when the piston 12 draws the material.

[0043] In order to achieve uniform opening and closing of the sealing plate 4, thereby accurately pumping the powder, and at the same time achieving a sealing effect of the cylindrical tube 11, the following features are specifically set:

[0044] The side of the feeding pipe 3 is provided with a first motor 22, a crank 16, a connecting rod 15, and a sealing ring 13. The first motor 22 is vertically fixed on the clamping member formed by the shell. The crank 16 is rotatably fixed on the upper part of the output shaft of the first motor 22. The connecting rod 15 is connected to the crank 16 at the end away from the piston 12, and the opposite end of the connecting rod 15 is connected to the piston 12. The outer wall of the piston 12 is provided with an annular groove 23, and the sealing ring 13 fits in the annular groove 23. The outer wall of the piston 12 and the inner part of the cylindrical tube 11 are evenly coated with Teflon coating. When the first motor 22 drives the crank 16, and the crank 16 drives the connecting rod 15, the connecting rod 15 pulls the piston 12, so that the piston 12 reciprocates in a uniform linear motion in the cylindrical tube 11. When the piston 12 moves away from the feeding tube 3, due to the negative pressure, the sealing plate 4 of the forming bonding plate 6 in the bonding tube is pulled downward, thereby generating a gap with the inner wall of the rectangular cross-section section 7 in the feeding tube 3. The powder accumulated on the upper part of the sealing plate 4 falls into the cylindrical tube 11 due to the gravity and the negative pressure suction. When the piston 12 is pushed to the side of the cylindrical tube 11 near the feeding tube 3, the sealing plate 4 is upwardly fitted with the fitting plate 6 formed in the feeding tube 3 due to the negative pressure and the elastic action of the elastic member 5, and the powder in the cylindrical tube 11 is pushed into the feeding tube 3 by the piston 12 and falls below the sealing plate 4. The sealing ring 13 on the outside of the cylindrical tube 11 can achieve a sealing effect, and the Teflon coating applied on the inner wall of the cylindrical tube 11 and the outer wall of the piston 12 can reduce friction and extend the service life of the sealing ring 13.

[0045] In order to achieve the fixation of the connecting rod 15 and the piston 12, the connection between the connecting rod 15 and the crank 16 is specifically provided with the following features:

[0046] The crank 16 is formed with an upward cylindrical plug shaft 17 at the end away from the axis center, and an elastic gap 19 is provided in the middle of the cylindrical plug shaft 17 for the plug sheet to press tightly. An anti-slip flange 18 is formed on the upper part of the cylindrical plug shaft 17. The end of the connecting rod 15 far from the piston 12 is fixedly axially connected to the crank 16 through the cylindrical plug shaft 17, and the upper part of the connecting rod 15 fits the anti-slip flange 18. The end of the piston 12 far from the feeding pipe 3 is formed with an elastic retaining ring 14, and the end of the connecting rod 15 near the piston 12 is formed with a short shaft, and the short shaft of the connecting rod 15 is vertically inserted in the elastic retaining ring 14. When the crank 16 is driven by the first motor 22, the end of the connecting rod 15 far from the piston 12 passes through the elastic gap 19 in the middle of the cylindrical plug shaft 17, is inserted into the cylindrical plug shaft 17, and then is inserted into the elastic gap 19 through the fastening piece 20, so that the connecting rod 15 is axially connected to the cylindrical plug shaft 17, and the upper part of the connecting rod 15 fits with the anti-slip flange 18 on the cylindrical plug shaft 17 of the crank 16, so that the connecting rod 15 can only move horizontally in the cylindrical plug shaft 17, and when the connecting rod 15 pulls the elastic retaining ring 14 formed on the piston 12, the elastic retaining ring 14 pulls the piston 12 to reciprocate in the cylindrical tube 11.

[0047] In order to achieve uniform delivery of the powder in the temporary storage bin 25 to the diffusion nozzle 29, the following features are specifically provided:

[0048] The material distribution blade 26 is horizontally installed in the temporary storage bin 25 and is coaxially arranged with the cylindrical accommodating chamber 27. It also includes a first bearing 28, which is horizontally arranged in the temporary storage bin 25. The first bearing 28 is arranged at the end of the shaft of the material distribution blade 26. The opening between two adjacent blades of the material distribution blade 26 is larger than the diameter of the upper drop-out port and smaller than the diameter of the lower discharge port. When the powder in the transparent transfer tube 24 falls into the temporary storage bin 25, due to the drive of the driving mechanism 39, the material distribution blade 26 in the temporary storage bin 25 is driven by the first toothed disc 41, and the powder falls into the storage bin between the two blades evenly and equally. Due to the uniform rotation of the powder blade, when it rotates to the lower part of the temporary storage bin 25, the powder is evenly thrown out from the lower discharge port of the temporary storage bin 25 and quantitatively transported to the diffusion drop-out nozzle 29.

[0049] In order to achieve uniform diffusion of powder at the flat mouth and average discharge, the following features are specifically set:

[0050] The diffusion blanking nozzle 29 includes a flat nozzle 33, a double-turn spiral shaft 30, a second bearing 32, and an arc-shaped grid bottom plate 31. The flat nozzle 33 is provided with a connecting pipe vertically connected to the temporary storage bin 25. A cylindrical bin 34 is formed inside the flat nozzle 33. The double-turn spiral shaft 30 is horizontally arranged in the cylindrical bin 34 and is coaxial with the cylindrical bin 34. The second bearing 32 is arranged at both ends of the double-turn spiral shaft 30. The arc-shaped grid bottom plate 31 is inserted into the flat nozzle 33 along the axial direction of the cylindrical bin 34. The arc-shaped grid bottom plate 31 is installed directly below the double-turn spiral shaft 30. The flat nozzle 33 is fixed on a clamping piece formed on the inner wall of the outer shell 1. When the powder falls to the middle of the double-turn screw shaft 30 through the connecting pipe, the driving mechanism 39 drives the second gear disc 43 to drive the double-turn screw shaft 30 to rotate around its own axis, and the powder is transported from the middle of the double-turn screw shaft 30 to both ends, and falls to the bottom of the double-turn screw shaft 30 during the transportation process, and is evenly discharged from the flat mouth 33 through the arc-shaped grid bottom plate 31.

[0051] In order to realize the simultaneous driving of the material distribution blade 26 and the double-rotation screw shaft 30, the material distribution blade 26 and the double-rotation screw shaft 30 are driven simultaneously but at different speeds, and the following features are specifically set:

[0052] The driving mechanism 39 includes a second motor 46, a coupling 44, a rotating shaft 45, a first gear 40, a second gear 42, a first toothed disc 41, and a second toothed disc 43. The second motor 46 is vertically fixed on a clamping piece formed on the shell. The rotating shaft 45 is connected to the output shaft of the second motor 46 through the coupling 44. The first gear 40 and the second gear 42 are coaxially fixed on the rotating shaft 45 in sequence from top to bottom. The first toothed disc 41 is fixed to the end of the shaft of the distributing blade 26 away from the blade. The second toothed disc 43 is fixed to one end of the double-helix screw shaft 30. The first gear 40 is meshed with the first toothed disc 41, and the second gear 42 is meshed with the second toothed disc 43. The first gear 40, the second gear 42, the first toothed disc 41, the second toothed disc 43 and the rotating shaft 45 are all fixed on the clamping piece formed on the inner wall of the shell 1. When the second motor 46 drives the rotating shaft 45 to rotate, the first gear 40 and the second gear 42 are driven to drive the first toothed disc 41 and the second toothed disc 43 to rotate. The rotation of the first toothed disc 41 drives the material distribution blades 26 to rotate, and the second toothed disc 43 drives the double-helix spiral shaft 30 to rotate. The first gear 40 and the second gear 42 have the same gear ratio, and the gear ratio of the first toothed disc 41 is greater than that of the second toothed disc 43. The second toothed disc 43 is fixed to one end of the double-helix spiral shaft 30, the first gear 40 is meshed with the first toothed disc 41, and the second gear 42 is meshed with the second toothed disc 43. When the second motor 46 drives the rotating shaft 45 through the coupling 44 to drive the first gear 40 and the second gear 42, the first gear 40 and the second gear 42 drive the first toothed disc 41 and the second toothed disc 43, thereby achieving the effect of driving the material distribution blades 26 and the double-helix spiral shaft 30 at the same time.

[0053] In order to realize the function of monitoring the powder filling degree in the transparent transfer tube 24, the following features are specifically set:

[0054] The grating sensor 35 includes a transmitting plate 36, a receiving plate 37, and a stud 38. The transmitting plate 36 and the receiving plate 37 are screwed to both sides of the transparent transfer tube 24 through the stud 38. The transmitting plate 36 and the receiving plate 37 are vertically fixed to the clamping member formed on the inner wall of the housing 1. The transmitter of the grating sensor 35 transmits a signal, which passes through the transparent transfer tube 24 to the receiving plate 37. The receiving plate 37 receives the signal to realize the function of monitoring the powder filling degree in the transparent transfer tube 24.

[0055] A method for preparing a graphene copper-based composite material by sintering and curing is also provided, comprising the following steps:

[0056] S1, the powder falls into the feeding pipe 3 through the feeding pipe 2, encounters the obstruction of the sealing plate 4, and accumulates on the upper part of the sealing plate 4;

[0057] S2, when the piston 12 in the cylindrical tube 11 is pulled toward one end of the feeding tube 3, negative pressure is generated, pulling the sealing plate 4 to produce a gap between the inner wall of the feeding tube 3, and the powder is drawn into the cylindrical tube 11. When the piston 12 is pushed toward one end of the feeding tube, the sealing plate 4 rotates upward, the gap between the sealing plate 4 and the feeding tube 3 is blocked, and the powder is pushed into the feeding tube 3, the lower part of the sealing plate 4.

[0058] S3, due to the effect of the one-way air-permeable film, the powder cannot be drawn back into the cylindrical tube 11 by the negative pressure, and falls into the transparent transfer tube 24 through the one-way air-permeable film 21.

[0059] S4, when the powder passes through the transparent transfer tube 24, it is monitored by the grating sensor 35 and falls into the temporary storage box 25. The driving mechanism 39 drives the dividing blades 26 to rotate in the cylindrical accommodating chamber 27. The powder is evenly and equally stored between the two blades. When the dividing blades 26 rotate to the lower part of the temporary storage box 25, it is thrown into the diffusion nozzle 29 below the temporary storage box 25 and discharged through the diffusion nozzle.

[0060] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A sintering and curing device for preparing graphene copper-based composite materials, characterized in that: The invention comprises a shell (1) and a feeding pipe (3), a transparent transfer pipe (24), a temporary storage bin (25) and a diffusion nozzle (29) which are arranged on the inner side of the shell (1) in order from top to bottom. A feeding pipe (2) which can be inserted inwardly into the feeding pipe (3) is arranged on the top of the shell (1). A sealing plate (4) which is used to elastically seal the lower end of the feeding end upward is arranged in the feeding pipe (3). A cylindrical tube (11) which is in communication with the inner side of the feeding pipe (3) is arranged transversely on the tube wall of the feeding pipe (3). A piston (12) which can reciprocate is arranged in the cylindrical tube (11). The sealing plate (4) is located at the height of the piston (12). The sealing plate (4) is axially connected to the inner side of the feeding pipe (3). The free end of the sealing plate (4) faces the cylindrical tube (11). The bottom of the material passing pipe (3) is provided with a one-way breathable adhesive film (21), the outer side of the transparent transfer tube (24) is provided with a grating sensor (35) for detecting the filling degree of powder, the temporary storage bin (25) is axially connected with a material dividing fan blade (26) whose axis is horizontally arranged, and the temporary storage bin (25) is formed with a cylindrical accommodating cavity (27) for accommodating the material dividing fan blade (26), the outer edge of the material dividing fan blade (26) is slidably fitted on the inner wall of the cylindrical accommodating cavity, the cylindrical accommodating cavity is connected to the transparent transfer tube (24) upwards and connected to the diffusion blanking nozzle (29) downwards, and the side of the temporary storage bin (25) is also provided with a driving mechanism (39) for synchronously driving the material dividing fan blade (26) and the diffusion blanking nozzle (29) to work.

2. The graphene copper-based composite material preparation, sintering and curing device according to claim 1, characterized in that: An elastic member (5) is provided inside the material passing tube, a rectangular cross-section section (7) is formed in the middle of the material passing tube (3), one end of the elastic member (5) is fitted to the upper part of the sealing plate (4), and a limiting fitting plate (6) is formed inside the material passing tube to fit the upper part of the sealing plate (4).

3. The graphene copper-based composite material preparation, sintering and curing device according to claim 2, characterized in that: The elastic member (5) is a metal elastic bent sheet, and a first embedding groove for fixing the metal elastic bent sheet is formed on the rectangular cross-section section (7) in the feeding tube, and an inclined baffle (8) is formed on the upper part of the feeding tube (3) to fit the upper part of the sealing plate (4), and a slot (9) is formed on the upper part of the sealing plate (4) to fit the metal elastic bent sheet.

4. The graphene copper-based composite material preparation, sintering and curing device according to claim 1, characterized in that: The feeding pipe (3) is provided with a first motor (22), a crank (16), a connecting rod (15), and a sealing ring (13). The first motor (22) is vertically fixed on a clamping member formed by the shell. The crank (16) is rotatably fixed on the upper part of the motor shaft. The end of the connecting rod (15) far from the piston (12) is connected to the crank (16). The opposite end of the connecting rod (15) is connected to the piston (12). The outer wall of the piston (12) is provided with an annular groove (23). The sealing ring (13) fits in the annular groove (23). The outer wall of the piston (12) and the inner part of the cylindrical tube (11) are evenly coated with Teflon coating.

5. The graphene copper-based composite material preparation, sintering and curing device according to claim 4, characterized in that: A cylindrical plug-in shaft (17) is formed at the distal axial end of the crank (16), and an elastic gap (19) is provided in the middle of the cylindrical plug-in shaft (17) for the plug-in sheet to press against. An anti-slip flange (18) is formed on the upper portion of the cylindrical plug-in shaft (17). The end of the connecting rod (15) distal to the piston (12) is fixedly connected to the crank (16) via the cylindrical plug-in shaft (17), and the upper portion of the connecting rod (15) fits the anti-slip flange (18). An elastic retaining ring (14) is formed at the end of the piston (12) distal to the material pipe (3), and a short shaft is formed at the end of the connecting rod (15) proximal to the piston (12), and the short shaft of the connecting rod (15) is vertically inserted into the elastic retaining ring (14).

6. The graphene copper-based composite material preparation, sintering and curing device according to claim 1, characterized in that: The dividing fan blade (26) is horizontally installed in the temporary storage bin and is coaxially arranged with the cylindrical accommodating cavity. It also includes a first bearing (28). The first bearing (28) is horizontally arranged in the temporary storage bin. The first bearing (28) is arranged at the end of the axis of the dividing fan blade (26). The opening between two adjacent blades of the dividing fan blade (26) is larger than the diameter of the upper blanking port and smaller than the diameter of the lower discharge port.

7. The graphene copper-based composite material preparation, sintering and curing device according to claim 1, characterized in that: The diffusion blanking nozzle (29) includes a flat nozzle (33), a double-rotating spiral shaft (30), a second bearing (32), and an arc-shaped grille bottom plate (31). A connecting pipe vertically connected to the temporary storage bin (25) is arranged in the middle of the flat nozzle (33). A cylindrical bin (34) is formed inside the flat nozzle (33). The double-rotating spiral shaft (30) is horizontally arranged in the cylindrical bin (34) and is coaxial with the cylindrical bin (34). The second bearing (32) is arranged at both ends of the double-rotating spiral shaft (30). The arc-shaped grille bottom plate (31) is inserted into the flat nozzle (33) along the axial direction of the cylindrical bin (34). The arc-shaped grille bottom plate (31) is installed directly below the double-rotating spiral shaft (30). The flat nozzle (33) is fixed on a clamping piece formed on the inner wall of the outer shell (1).

8. The graphene copper-based composite material preparation, sintering and curing device according to claim 1, characterized in that: The driving mechanism (39) includes a second motor (46), a coupling (44), a rotating shaft (45), a first gear (40), a second gear (42), a first toothed disc (41), and a second toothed disc (43). The second motor (46) is vertically fixed on a clamping member formed by a shell. The rotating shaft (45) is connected to the rotating shaft (45) of the second motor (46) through the coupling (44). The first gear (40) and the second gear (42) are coaxially fixed on the rotating shaft (45) in sequence. The first toothed disc (41) is fixed on the material distribution fan. The blade (26) shaft is at the distal end of the fan blade, the second toothed disc (43) is fixed at both ends of the double-helix screw shaft (30), the first gear (40) is meshed with the first toothed disc (41), the second gear (42) is meshed with the second toothed disc (43), the first gear (40) and the second gear (42) have the same tooth number ratio, the first toothed disc (41) has a greater tooth number ratio than the second toothed disc (43), and the first gear (40), the second gear (42), the first toothed disc (41), and the second toothed disc (43) are all fixed in a clamping member formed on the inner wall of the housing (1).

9. The graphene copper-based composite material preparation, sintering and curing device according to claim 1, characterized in that: The grating sensor (35) comprises a transmitting plate (36), a receiving plate (37), and a stud (38). The transmitting plate (36) and the receiving plate (37) are fixed to both sides of the transparent transfer tube (24) by means of the stud (38) and screws. The transmitting plate (36) and the receiving plate (37) are vertically fixed to a clamping member formed on the inner wall of the housing (1).

10. A method for preparing a graphene copper-based composite material using the apparatus according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, the powder falls into the feeding pipe (3) through the feeding pipe (2), encounters the obstruction of the sealing plate (4), and accumulates on the upper part of the sealing plate (4); S2, when the piston (12) in the cylindrical tube (11) is pulled toward one end of the feed pipe (3), negative pressure is generated, which pulls the sealing plate (4) and the inner wall of the feed pipe (3) to form a gap, and the powder is drawn into the cylindrical tube (11). When the piston (12) is pushed toward one end of the feed pipe, the sealing plate (4) rotates upward, the gap between the sealing plate (4) and the feed pipe (3) is blocked, and the powder is pushed into the feed pipe (3) and the lower part of the sealing plate (4). S3, due to the effect of the one-way air-permeable film, the powder cannot be drawn back into the cylindrical tube (11) by the negative pressure, and falls into the transparent transfer tube (24) through the one-way air-permeable film (21). S4, when the powder passes through the transparent transfer tube (24), it is monitored by the grating sensor (35) and falls into the temporary storage box (25). The driving mechanism (39) drives the distribution blades (26) to rotate in the cylindrical accommodating chamber (27), and the powder is evenly stored between the two blades. When the distribution blades (26) rotate to the lower part of the temporary storage box (25), the powder is thrown into the diffusion discharge nozzle (29) below the temporary storage box (25) and discharged through the diffusion discharge nozzle.

Images