Photocuring and ink direct writing combined 3D printer

Abstract

The utility model discloses a 3D printer combining photocuring with ink direct writing, which comprises a printing platform, an injector and a laser, and a printing groove for accommodating ceramic slurry is formed in the printing platform; the injector is arranged above the printing platform and connected with a driving mechanism erected on the printing platform, and a conveying channel communicating with the metal slurry conveying pipe, a negative pressure cavity communicating with the outlet end of the conveying channel, a waterproof breathable film arranged between the negative pressure cavity and the conveying channel and a material extruding piece are arranged in the injector. The driving end of the material extruding part is arranged in the conveying channel so as to extrude and convey the metal slurry to an outlet of the conveying channel; the laser is connected with the injector; according to the device, residual bubbles in the metal slurry can be effectively removed, so that the situation of discharging interruption of a printing spray head is avoided, and the forming quality of a printed finished product is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of HTCC substrate processing, in particular to a 3D printer combining photocuring and ink direct writing. Background Art

[0002] With the rapid development of modern industrial technology, HTCC ceramic substrates (High temperature cofired ceramics) are widely used in the electronics industry, semiconductors and other fields. They have the advantages of corrosion resistance, high temperature resistance, long life, high efficiency and energy saving, uniform temperature, good thermal conductivity, and fast thermal compensation. HTCC ceramic substrates are generally constructed by 3D printing.

[0003] Publication number CN107471399A provides a new type of laser 3D printer and control method for printing ceramic materials, including a printing bracket and a loading platform, the loading platform is arranged in the printing bracket, and the two ends of the loading platform are respectively provided with a front material receiving port and a rear material receiving port, and a feed port is arranged behind the front material receiving port; the printer also includes: a horizontal scraper system, which is arranged on the loading platform and moves horizontally between the front material receiving port and the rear material receiving port; a ceramic forming system, including a printing platform, a forming cylinder and a printing platform lifting mechanism; a recycling system, including a material recovery box, a filtering system, a material storage box and a pumping system; a laser scanning system, which is arranged above the printing bracket, and the light outlet of the laser scanning system is aligned with the center position of the printing platform. During the printing process, the laser is emitted by the laser scanning system to irradiate the ceramic material on the printing platform to solidify the ceramic material.

[0004] However, during the printing process of the 3D printer, due to the presence of bubbles inside the slurry, when the print head encounters bubbles, the discharge of the material will be interrupted, affecting the formation of the printed product. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies and propose a 3D printer combined with photocuring and ink direct writing to solve the technical problem in the prior art that bubbles exist inside the slurry, resulting in interruption of material discharge when the print head encounters bubbles, thus affecting the molding of the printed product.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a 3D printer combined with photocuring and ink direct writing, comprising: a printing platform, a syringe and a laser, wherein the printing platform is provided with a printing slot for accommodating ceramic slurry; the syringe is arranged above the printing platform and is connected to a driving mechanism mounted on the printing platform, a delivery channel connected to a metal slurry delivery pipe, a negative pressure chamber connected to an outlet end of the delivery channel, a waterproof and breathable membrane arranged between the negative pressure chamber and the delivery channel, and an extruding member are arranged in the syringe, wherein the driving end of the extruding member is arranged in the delivery channel to extrude and deliver the metal slurry to the outlet of the delivery channel; the laser is connected to the syringe.

[0008] In some embodiments, the syringe includes a housing and a nozzle, the housing is provided with a conveying groove vertically penetrating the housing to form the conveying channel, the bottom end of the conveying groove is provided with a negative pressure groove to form a negative pressure chamber arranged outside the outlet end of the conveying channel, the nozzle is detachably sleeved on one end of the housing near the outlet of the conveying groove to block the negative pressure groove and the conveying groove, and the nozzle is provided with a through hole communicating with the conveying channel. The nozzle is threadedly connected to the housing.

[0009] In some embodiments, a first annular mesh frame and a second annular mesh frame are provided inside the nozzle, the second annular mesh frame is fixedly connected to the nozzle, the first annular mesh frame is sleeved on the outside of the second annular mesh frame and is spaced apart from the second annular mesh frame, the waterproof and breathable membrane is sleeved on the outside of the second annular mesh frame and is located between the first annular mesh frame and the second annular mesh frame; the heights of the first annular mesh frame, the second annular mesh frame and the negative pressure groove are equal, and a gap is reserved between the second annular mesh frame and the side wall of the negative pressure groove.

[0010] In some embodiments, the extrusion member includes a rotating shaft, a stirring blade, a spiral blade and a driving motor. The rotating shaft is arranged in the conveying trough, and its end close to the outlet of the conveying channel forms an extrusion end, and the other end forms a stirring end. The outer side of the stirring end is arranged with a plurality of stirring blades in sequence along the circumference, and the outer side of the extrusion end is provided with the spiral blade, and the driving end of the driving motor is connected to the rotating shaft; the diameter of the outlet end of the conveying trough is smaller than the diameter of the corresponding part of the conveying trough and the extrusion end, and the diameter of the corresponding part of the conveying trough and the extrusion end is smaller than the diameter of the corresponding part of the conveying trough and the stirring end.

[0011] In some embodiments, the driving mechanism includes a lifting drive member, a transverse drive member and a longitudinal drive member; the lifting drive member includes a lifting frame, a first mounting frame, a first pulley and a first motor, the first pulley is installed on the first mounting frame, a side of the lifting frame is provided with a lifting groove for the first pulley to roll, and a driving end of the first motor is connected to the first pulley to drive the first mounting frame to move in a first direction through the first pulley; the transverse drive member includes a transverse frame, a second mounting frame, a second pulley and a second motor, the second pulley is installed on the second mounting frame, a side of the transverse frame is provided with a transverse groove for the second pulley to roll, and a driving end of the second motor is connected to the second pulley to The second mounting frame is driven to move in a second direction by the second pulley, and the second direction is perpendicular to the first direction; the longitudinal driving member is connected to the printing platform to drive the printing platform to move in a third direction, and the third direction is perpendicular to both the first direction and the second direction; the longitudinal driving member includes a base, a third mounting frame, a third pulley and a third motor, the third pulley is installed on the third mounting frame, the base is arranged below the printing platform, and a longitudinal groove for the third pulley to roll is provided on the top of the base, and a driving end of the third motor is connected to the third pulley to drive the third mounting frame to move in the third direction through the third pulley, and the third mounting frame is fixedly connected to the printing platform.

[0012] In some embodiments, a feed hole connected to a ceramic slurry feed pipe is provided at the bottom of the printing tank so that the ceramic slurry can be poured into the printing tank through the feed hole.

[0013] Compared with the prior art, the photocuring combined with ink direct writing 3D printer provided by the utility model, through the provided conveying channel, negative pressure chamber, waterproof breathable membrane and extrusion piece, conveys metal slurry through the conveying channel, and extrude and conveys the metal slurry to the outlet of the conveying channel through the extrusion piece, so as to perform 3D printing, and at the same time, can squeeze out the bubbles in the metal slurry, and the gas is absorbed by the negative pressure chamber when passing through the outlet of the conveying channel, and a waterproof breathable membrane is provided to separate the conveying channel from the negative pressure chamber to prevent material from flowing out, thereby effectively removing the bubbles remaining in the metal slurry to avoid the interruption of material discharge from the printing nozzle, thereby ensuring the molding quality of the printed product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a 3D printer combining photocuring and ink direct writing provided by an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the overall main view structure of a 3D printer combining photocuring and ink direct writing provided by an embodiment of the utility model;

[0016] Figure 3 It is a schematic diagram of the main cross-sectional structure of a syringe of a 3D printer combined with light-curing and ink direct writing provided by an embodiment of the utility model;

[0017] Figure 4 yes Figure 3 A in the enlarged view;

[0018] Figure 5 It is a three-dimensional structural schematic diagram of the nozzle of a 3D printer combining photocuring and ink direct writing provided by an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1. Printing platform; 11. Printing slot;

[0021] 2. syringe; 201. delivery channel; 202. negative pressure chamber; 203. waterproof breathable membrane; 21. extrusion member; 211. rotating shaft; 212. stirring blade; 213. spiral blade; 214. driving motor; 215. column; 216. hollow frame; 22. shell; 221. delivery trough; 222. negative pressure trough; 23. nozzle; 231. through hole; 24. first annular net frame; 25. second annular net frame;

[0022] 3. Laser;

[0023] 4. Driving mechanism; 41. Lifting driving member; 411. Lifting frame; 412. First mounting frame; 413. First pulley; 42. Transverse driving member; 421. Transverse frame; 422. Second mounting frame; 423. Second pulley; 43. Longitudinal driving member. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] In order to solve the technical problem that bubbles exist inside the slurry, which causes the interruption of material discharge when the print nozzle encounters bubbles, thus affecting the molding of the printed product, the utility model provides a 3D printer combined with photocuring and ink direct writing, which can remove the bubbles remaining in the metal slurry to avoid the interruption of material discharge from the print nozzle and ensure the molding quality of the printed product.

[0026] See also Figures 1 to 3The 3D printer combining photocuring and ink direct writing includes: a printing platform 1, a syringe 2 and a laser 3. The printing platform 1 is provided with a printing slot 11 for accommodating ceramic slurry; the syringe 2 is arranged above the printing platform 1 and is connected to a driving mechanism 4 mounted on the printing platform 1. The syringe 2 is provided with a conveying channel 201 connected to a metal slurry conveying pipe, a negative pressure chamber 202 connected to an outlet end of the conveying channel 201, a waterproof and breathable membrane 203 arranged between the negative pressure chamber 202 and the conveying channel 201, and an extruding member 21. The driving end of the extruding member 21 is arranged in the conveying channel 201 to extrude and convey the metal slurry to the outlet of the conveying channel 201; the laser 3 is connected to the syringe 2.

[0027] In the present device, a printing tank 11 for accommodating ceramic slurry is provided on the printing platform 1, a syringe 2 is provided above the printing platform 1, and is connected to a driving mechanism 4 mounted on the printing platform 1, a laser 3 is connected to the syringe 2, so that the driving mechanism 4 can drive the syringe 2 and the laser 3 to move, so as to drive the laser 3 to move along a set route, drive the laser 3 to emit a laser at a specified position to irradiate the ceramic material on the printing platform 1, and solidify the ceramic material; it can also drive the syringe 2 to move along a set route, so as to facilitate the extrusion of metal slurry for 3D printing; wherein, a syringe 2 is provided with a laser 30 connected to the metal slurry. The conveying channel 201 is connected to the slurry conveying pipe, the negative pressure chamber 202 is connected to the outlet end of the conveying channel 201, the waterproof breathable membrane 203 is arranged between the negative pressure chamber 202 and the conveying channel 201, and the extrusion piece 21, wherein the metal slurry conveying pipe is connected to the first conveying pump in the metal slurry container. During implementation, the metal slurry can be squeezed and conveyed to the outlet of the conveying channel 201 through the extrusion piece 21, so that the bubbles in the metal slurry are squeezed and the gas can be absorbed by the negative pressure chamber 202 before discharging. The waterproof breathable membrane 203 can prevent the material from flowing out, thereby effectively removing the bubbles remaining in the metal slurry.

[0028] In order to achieve the displacement of the syringe 2 relative to the printing platform 1, in this embodiment, refer to Figure 1 and Figure 2 The driving mechanism 4 includes a lifting driving member 41, a transverse driving member 42 and a longitudinal driving member 43.

[0029] In some embodiments, the lifting drive member 41 includes a lifting frame 411, a first mounting frame 412, a first pulley 413 and a first motor. The first pulley 413 is mounted on the first mounting frame 412. A lifting groove for the first pulley 413 to roll is provided on the side of the lifting frame 411. The driving end of the first motor is connected to the first pulley 413. Specifically, the lifting frame 411 is a gantry frame. Two first mounting frames 412 are provided, which are respectively connected to two columns of the lifting frame 411. A plurality of first pulleys 413 are installed on each first mounting frame 412. The lifting frame 411 A lifting groove for the first pulley 413 to roll is provided on the side, so that the first mounting frame 412 is slidably connected to the lifting frame 411 through the first pulley 413, and at least one first motor is provided, which is installed on at least one first mounting frame 412, and the driving end is fixedly connected to the rotating shaft 211 of the first pulley 413, so as to drive the first mounting frame 412 to move in the first direction through the first pulley 413, and the first direction is the height direction of the lifting frame 411, and the transverse driving member 42 is fixed between the two first mounting frames 412, so that the lifting driving member 41 can drive the transverse driving member 42 to perform lifting movement.

[0030] In some embodiments, the transverse driving member 42 includes a transverse frame 421, a second mounting frame 422, a second pulley 423 and a second motor. The transverse frame 421 is fixed between the two first mounting frames 412, and the second pulley 423 is rotatably mounted on the second mounting frame 422. A transverse groove for the second pulley 423 to roll is provided on the side of the transverse frame 421, so that the second mounting frame 422 is slidably connected to the transverse frame 421 through the second pulley 423. The second motor is installed on the second mounting frame 422, and its driving end is fixedly connected to the rotating shaft 211 of the second pulley 423 to drive the second mounting frame 422 to move along the second direction through the second pulley 423. The second direction is the length direction of the transverse frame 421, and the second direction is perpendicular to the first direction, so that the transverse driving member 42 can drive the syringe 2 to move transversely.

[0031] In some embodiments, the longitudinal driving member 43 is connected to the printing platform 1 to drive the printing platform 1 to move along a third direction, wherein the third direction is perpendicular to both the first direction and the second direction, and can drive the printing platform 1 to move longitudinally; specifically, in this embodiment, the longitudinal driving member 43 includes a base, a third mounting frame, a third pulley and a third motor, wherein the third pulley is installed on the third mounting frame, and the base is arranged below the printing platform 1. A longitudinal groove for the third pulley to roll is provided on the top of the base along the longitudinal direction, so that the third mounting frame is slidably connected to the base through the third pulley, and the driving end of the third motor is connected to the third pulley to drive the third mounting frame to move along the third direction through the third pulley, and the third mounting frame is fixedly connected to the printing platform 1, so that the printing platform 1 can move longitudinally.

[0032] It should be noted that, in other embodiments, the lifting drive member 41, the transverse drive member 42 and the longitudinal drive member 43 may also be in other forms, such as a ball screw mechanism.

[0033] Furthermore, in order to ensure the stability of the printing platform 1, two parallel sliding sleeves are arranged under the printing platform 1. The sliding sleeves are slidably arranged on the sliding rod. The sliding sleeves are fixedly connected to the printing platform 1 and can support the printing platform 1 when it moves longitudinally.

[0034] The above embodiments are merely multiple possible implementations of the embodiments of the present application, and the embodiments of the present application are not limited thereto.

[0035] In order to facilitate the addition of ceramic slurry to the printing tank 11, in some embodiments, a feed hole connected to the ceramic slurry feed pipe is opened at the bottom of the printing tank 11, and the feed hole is connected to the second delivery pump in the ceramic slurry container through the ceramic slurry feed pipe, so that the material in the ceramic slurry container can be transferred to the printing tank 11; the printing platform 1 is also provided with a scraper for scraping off excess ceramic slurry.

[0036] In order to realize the material delivery and facilitate the replacement of the waterproof and breathable membrane 203 in the syringe 2, in this embodiment, refer to Figure 3 and Figure 4The syringe 2 includes a shell 22 and a nozzle 23. A conveying groove 221 is provided inside the shell 22 and vertically penetrates the shell 22 to form the conveying channel 201. A negative pressure groove 222 is provided outside the bottom end of the conveying groove 221. The diameter of the negative pressure groove 222 is larger than the diameter of the conveying groove 221 to form a negative pressure cavity 202 arranged outside the outlet end of the conveying channel 201. The nozzle 23 is detachably sleeved on one end of the shell 22 close to the outlet of the conveying groove 221 to block the negative pressure groove 222. and one end of the conveying groove 221, so that the nozzle 23 can be removed from one end of the shell 22 through the detachable connection between the nozzle 23 and the shell 22, so that the bottom ends of the negative pressure groove 222 and the conveying groove 221 are exposed, so as to facilitate the replacement of the waterproof and breathable membrane 203 between the conveying channel 201 and the negative pressure chamber 202; the nozzle 23 is also provided with a through hole 231 connected to the conveying channel 201, so that the material in the conveying channel 201 can flow to the through hole 231 of the nozzle 23, and the material is ejected through the through hole 231 to perform printing.

[0037] Preferably, in this embodiment, the nozzle 23 is threadedly connected to the housing 22, so that the nozzle 23 is easily connected to the housing 22. It should be noted that in other embodiments, the connection between the housing 22 and the nozzle 23 is not limited to this, and can also be a snap fit.

[0038] In order to facilitate the fixing of the waterproof breathable membrane 203, in some embodiments, see Figures 3 to 5 The nozzle 23 is provided with a first annular mesh frame 24 and a second annular mesh frame 25 inside. The second annular mesh frame 25 is arranged on the inner side of the first annular mesh frame 24 and is fixedly connected to the nozzle 23. Moreover, the first annular mesh frame 24 and the second annular mesh frame 25 are arranged at intervals. The interval gap can just accommodate the waterproof breathable membrane 203, so that the waterproof breathable membrane 203 can be sleeved on the outer side of the second annular mesh frame 25 and located between the first annular mesh frame 24 and the second annular mesh frame 25. By arranging the first annular mesh frame 24 and the second annular mesh frame 25, the inner and outer sides of the waterproof breathable membrane 203 are limited and fixed, so that the waterproof breathable membrane 203 can be prevented from deformation or loosening.

[0039] During implementation, since the bottom end of the second annular mesh frame 25 is fixedly connected to the nozzle 23, the first annular mesh frame 24 is movably sleeved on the outside of the second annular mesh frame 25. Therefore, when replacing the waterproof breathable membrane 203, the first annular mesh frame 24 is removed, and the waterproof breathable membrane 203 sleeved on the second annular mesh frame 25 can be removed. After the new waterproof breathable membrane 203 is sleeved on the second annular mesh frame 25, the first annular mesh frame 24 is sleeved on the outside of the second annular mesh frame 25 and the waterproof breathable membrane 203, so that the waterproof breathable membrane 203 can be fixed.

[0040] It should be noted that, in the present embodiment, the heights of the first annular mesh frame 24, the second annular mesh frame 25 and the negative pressure groove 222 are equal. When the nozzle 23 is completely screwed onto the shell 22, the first annular mesh frame 24 and the second annular mesh frame 25 are fitly arranged inside the negative pressure groove 222. The bottom ends of the first annular mesh frame 24 and the second annular mesh frame 25 both abut against the inner wall of the nozzle 23, and the top ends of the first annular mesh frame 24 and the second annular mesh frame 25 both abut against the inner wall of the negative pressure groove 222, thereby clamping and fixing the first annular mesh frame 24 and the second annular mesh frame 25. A gap is reserved between the second annular mesh frame 25 and the side wall of the negative pressure groove 222, and the gap is connected to a vacuum pump or a fan to form a negative pressure environment outside the waterproof breathable membrane 203.

[0041] In order to realize the extrusion conveying of materials, in this embodiment, please refer to Figure 3 The extruding member 21 includes a rotating shaft 211, a stirring blade 212, a spiral blade 213 and a driving motor 214. The rotating shaft 211 is vertically arranged in the conveying trough 221 and is coaxially arranged with the conveying trough 221. The end of the rotating shaft 211 close to the outlet of the conveying channel 201 forms an extrusion end, and the end away from the outlet of the conveying channel 201 forms a stirring end. A plurality of stirring blades 212 are sequentially arranged along the circumference of the outer side of the stirring end. The spiral blade 213 is arranged on the outer side of the extrusion end. The stirring blade 212 and the spiral blade 213 are fixed to the rotating shaft 211. The driving motor 214 is fixedly connected, and the driving end thereof is fixedly connected to the top of the rotating shaft 211; when the material enters the conveying channel 201, it first contacts the stirring end of the rotating shaft 211, and then flows to the extrusion end, and the driving motor 214 drives the rotating shaft 211 to rotate, and drives the stirring blades 212 and the spiral blades 213 to rotate, so that the material can be pre-stirred by the stirring blades 212 to make the material mixed more evenly, and then the spiral rotation of the spiral blades 213 squeezes and pushes the material downward, so that the material can be discharged through the through hole 231 of the nozzle 23.

[0042] Furthermore, in some embodiments, the diameter of the outlet end of the conveying trough 221 is smaller than the diameter of the corresponding portion of the conveying trough 221 and the extrusion end, and the diameter of the corresponding portion of the conveying trough 221 and the extrusion end is smaller than the diameter of the corresponding portion of the conveying trough 221 and the stirring end, that is, the diameters of the top, middle, and bottom ends of the conveying trough 221 decrease in sequence; and a column 215 is provided at the bottom end of the rotating shaft 211, and the column 215 is located on the inner side of the second annular net frame 25, and the diameter of the column 215 is larger than the diameter of the rotating shaft 21 1 is slightly smaller than the diameter of the second annular net frame 25. When the material flows from the conveying channel 201 to the through hole 231, it will pass between the column 215 and the annular net frame, thereby making the flow channel narrower so as to squeeze out the bubbles in the material. A hollow frame 216 is provided at the bottom of the column 215. After the nozzle 23 is installed, the hollow frame 216 can be against the inner wall of the nozzle 23, thereby improving the stability of the extruding member 21, and the material can flow from between the column 215 and the second annular net frame 25 to the through hole 231 through the hollow frame 216.

[0043] It should be noted that, in other embodiments, the extrusion member 21 is not limited thereto, and may also be other structures capable of extruding materials; the laser 3 and the principle of the laser 3 emitting laser to solidify the ceramic material are both prior arts and will not be described in detail here.

[0044] Working principle: During implementation, first, the ceramic slurry is transported to the printing slot 11 through the ceramic slurry delivery pipe, and the lifting drive 41 and the horizontal drive 42 respectively drive the laser 3 to move up and down and horizontally, and the longitudinal drive 43 drives the printing platform 1 to move longitudinally, so that the laser 3 moves according to the set route, and the laser 3 emits a laser to irradiate the ceramic material on the printing platform 1 to solidify the ceramic material; the metal slurry is transported to the delivery channel 201 through the metal slurry delivery pipe, and the driving motor 214 drives the rotating shaft 211, the stirring blade 212 and the spiral blade 213 to rotate, so that when the material enters the delivery channel 201, the stirring blade 212 can pre-stir the material to make the material mixed more evenly, and then the spiral rotation of the spiral blade 213 pushes the material downward and squeezes it, so that when the material passes between the second annular mesh frame 25 and the column 215, the squeezed bubbles can be absorbed in the negative pressure environment of the negative pressure chamber 202, thereby effectively removing the bubbles remaining in the metal slurry, so that the nozzle 23 can perform inkjet printing normally.

[0045] The utility model provides a conveying channel 201, a negative pressure chamber 202, a waterproof breathable membrane 203 and an extruding piece 21, and conveys metal slurry through the conveying channel 201, and extrude and conveys the metal slurry to the outlet of the conveying channel 201 through the extruding piece 21, so as to perform 3D printing, and at the same time, can squeeze out the bubbles in the metal slurry, and the gas is absorbed by the negative pressure chamber 202 when passing through the outlet of the conveying channel 201, and a waterproof breathable membrane 203 is provided to separate the conveying channel 201 from the negative pressure chamber 202 to prevent the material from flowing out, thereby effectively removing the bubbles remaining in the metal slurry, so as to avoid the situation where the printing nozzle 23 is interrupted in discharging the material, and ensure the molding quality of the printed product.

[0046] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A 3D printer combining photocuring and ink direct writing, characterized in that: include: A printing platform, wherein a printing slot is provided on the printing platform; The syringe is arranged above the printing platform and connected to the driving mechanism mounted on the printing platform. The syringe is provided with a delivery channel connected to the metal slurry delivery pipe, a negative pressure chamber connected to the outlet end of the delivery channel, a waterproof and breathable membrane arranged between the negative pressure chamber and the delivery channel, and an extruding member. The driving end of the extruding member is arranged in the delivery channel to extrude and deliver the metal slurry to the outlet of the delivery channel. as well as, A laser is connected to the injector.

2. The 3D printer combining photocuring and ink direct writing according to claim 1, characterized in that: The syringe includes a shell and a nozzle. A conveying groove vertically penetrating the shell is provided inside the shell to form the conveying channel. A negative pressure groove is provided on the outside of the bottom end of the conveying groove to form a negative pressure cavity arranged on the outside of the outlet end of the conveying channel. The nozzle is detachably mounted on one end of the shell near the outlet of the conveying groove to seal the negative pressure groove and the conveying groove. A through hole connected to the conveying channel is provided in the nozzle.

3. The 3D printer combining photocuring and ink direct writing according to claim 2, characterized in that: The nozzle is threadedly connected to the shell.

4. The 3D printer combining photocuring and ink direct writing according to claim 3, characterized in that: A first annular mesh frame and a second annular mesh frame are arranged inside the nozzle, the second annular mesh frame is fixedly connected to the nozzle, the first annular mesh frame is sleeved on the outside of the second annular mesh frame and is arranged at an interval with the second annular mesh frame, and the waterproof and breathable membrane is sleeved on the outside of the second annular mesh frame and is located between the first annular mesh frame and the second annular mesh frame.

5. The 3D printer combining photocuring and ink direct writing according to claim 4, characterized in that: The first annular screen frame, the second annular screen frame and the negative pressure groove have the same height, and a gap is reserved between the second annular screen frame and the side wall of the negative pressure groove.

6. The 3D printer combining photocuring and ink direct writing according to claim 2, characterized in that: The extrusion component includes a rotating shaft, a stirring blade, a spiral blade and a driving motor. The rotating shaft is arranged in the conveying trough, and one end of the rotating shaft close to the outlet of the conveying channel forms an extrusion end, and the other end forms a stirring end. A plurality of stirring blades are arranged in sequence along the circumference of the outer side of the stirring end, and the spiral blade is arranged on the outer side of the extrusion end. The driving end of the driving motor is connected to the rotating shaft.

7. The 3D printer combining photocuring and ink direct writing according to claim 6, characterized in that: The diameter of the outlet end of the conveying trough is smaller than the diameter of the corresponding part of the conveying trough and the extrusion end, and the diameter of the corresponding part of the conveying trough and the extrusion end is smaller than the diameter of the corresponding part of the conveying trough and the stirring end.

8. The 3D printer combining photocuring and ink direct writing according to claim 1, characterized in that: The driving mechanism includes a lifting driving member and a lateral driving member; The lifting drive member includes a lifting frame, a first mounting frame, a first pulley and a first motor, wherein the first pulley is mounted on the first mounting frame, a lifting slot for the first pulley to roll is provided on a side of the lifting frame, and a driving end of the first motor is connected to the first pulley to drive the first mounting frame to move in a first direction through the first pulley; The transverse driving member includes a transverse frame, a second mounting frame, a second pulley and a second motor. The second pulley is mounted on the second mounting frame. A transverse groove for the second pulley to roll is provided on the side of the transverse frame. The driving end of the second motor is connected to the second pulley to drive the second mounting frame to move in a second direction through the second pulley. The second direction is perpendicular to the first direction.

9. The 3D printer combining photocuring and ink direct writing according to claim 8, characterized in that: The driving mechanism also includes a longitudinal driving member, which is connected to the printing platform to drive the printing platform to move along a third direction, and the third direction is perpendicular to the first direction and the second direction; the longitudinal driving member includes a base, a third mounting frame, a third pulley and a third motor, the third pulley is installed on the third mounting frame, the base is arranged below the printing platform, and a longitudinal groove for the third pulley to roll is provided on the top of the base, the driving end of the third motor is connected to the third pulley to drive the third mounting frame to move along the third direction through the third pulley, and the third mounting frame is fixedly connected to the printing platform.

10. The 3D printer combining photocuring and ink direct writing according to claim 1, characterized in that: A feeding hole connected with the ceramic slurry feeding pipe is provided at the bottom of the printing tank.

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