Multi-channel 3D printing head

Abstract

The invention discloses a multi-channel 3D printing head and aims to overcome the defects that most of existing 3D printing heads are single-channel, and selective printing, simultaneous extrusion printing and extrusion printing after mixing of various printing materials cannot be achieved. The printing head comprises a printing head body, at least two feeding channels are arranged on the printing head body, feeding screw rods are installed in the feeding channels, the lower portion of the printing head body is detachably connected with a discharging head, the feeding channels communicate with the discharging head, and feeding ports are formed in the printing head body and correspond to the feeding channels one to one. According to the multi-channel 3D printing head, selective printing, simultaneous extrusion printing and extrusion printing after mixing of various printing materials can be achieved.

Description

Technical Field

[0001] The present invention relates to a ceramic product processing device, and more particularly, to a multi-channel 3D printing head. Background Art

[0002] Ceramic products can be seen everywhere in industrial production and daily life. They are of various types and functions. As early as the Neolithic Age, my country already had rough and simple painted pottery and black pottery. Ceramics have many advantages such as excellent insulation, corrosion resistance, high temperature resistance, high hardness, low density, and radiation resistance, and are widely used. In the process of ceramic product processing, the blank needs to be processed first, and then the blank needs to be fired and colored. The traditional blank processing method is manual processing. For ceramic products with complex structures, 3D printing technology is currently used for processing, but most 3D print heads are single-channel, which cannot realize the selection and printing of multiple printing materials, simultaneous extrusion printing, and mixed extrusion printing. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides a multi-channel 3D printing head, which can realize selective printing of multiple printing materials, simultaneous extrusion printing and mixed post-extrusion printing.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a multi-channel 3D print head, comprising a print head body, at least two feeding channels are arranged on the print head body, feeding screws are installed in the feeding channels, the lower part of the print head body is detachably connected to the discharge head, the feeding channels are all connected to the discharge head, and feed ports are arranged on the print head body and in a one-to-one correspondence with the feeding channels.

[0005] The multi-channel 3D printing head is installed on a 3D printing device for ceramic products. The printing material is fed into the feeding channel through the feed port. The feeding screw in the feeding channel rotates to realize the transportation of the printing material. Finally, the printing material is extruded from the discharge head to print the ceramic product. Since at least two feeding channels are arranged on the print head body, different feeding channels can be loaded with printing materials of different colors and categories, and multiple feeding modes can be realized to meet various printing methods. For example, a single feeding screw is selected to rotate, and other feeding screws are stationary to realize the transportation of a single printing material, and then realize the printing operation of a single printing material. Alternatively, multiple feeding screws are selected to rotate to realize the simultaneous transportation of multiple printing materials, and multiple printing materials are extruded simultaneously to realize the printing of ceramic products, meeting the different process requirements of various types of ceramic products. The multi-channel 3D printing head of this patent application can realize the selective printing, simultaneous extrusion printing and mixed extrusion printing of multiple printing materials.

[0006] Preferably, the discharge head is a conical bucket-shaped structure that is larger at the top and smaller at the bottom.

[0007] The bucket-shaped structure of the discharge head is conducive to the extrusion of printing materials and prevents blockage.

[0008] Preferably, a boss is provided at the lower part of the print head body, a fastening ring is detachably connected to the boss, and the discharge head is fastened between the fastening ring and the boss.

[0009] The setting of the boss facilitates the installation of the discharging head. The setting of the fastening ring makes the installation of the discharging head more reliable.

[0010] Preferably, the lower outer wall of the boss converges inward from top to bottom to form an inclined fitting surface, and the upper inner wall of the discharge head fits well with the fitting surface.

[0011] The discharging head is matched and fitted with the inclined fitting surface, and has good sealing performance.

[0012] Preferably, a plurality of plugs adapted to the openings at the lower end of the feeding channel are arranged in the discharge head. After the discharge head is installed in place, the plugs are correspondingly inserted into the lower ends of the feeding channels to seal the feeding channels.

[0013] When one or several feeding channels need to be opened and other feeding channels need to be closed, a plug is set at the corresponding position of the feeding channel that needs to be closed in the discharge head, and the plug is inserted into the lower end of the feeding channel to block the feeding channel. This facilitates the delivery of printing materials in a single channel or multiple channels.

[0014] In another solution, a rotatable stirring and pushing impeller is installed in the discharge head, a stirring motor is installed on the print head body, the stirring motor is connected to the transmission shaft, and the stirring and pushing impeller is detachably connected to the transmission shaft.

[0015] When multiple feeding channels are used to mix and transport multiple printing materials, the printing materials transported from the feeding channels are first mixed in the discharge head. During mixing, the stirring motor drives the stirring and pushing impeller to rotate. The stirring and pushing impeller stirs and mixes the mixed printing materials while pushing the mixed materials toward the outlet of the discharge head, so that the evenly mixed printing materials are extruded outward for 3D printing operations of ceramic products.

[0016] Preferably, the feeding channel is arranged at an angle, and the feeding channel converges toward the middle from top to bottom.

[0017] The inclined feeding channel is conducive to the transportation of printing materials to the discharge head.

[0018] Preferably, the feed port is connected to the filter joint, a mounting groove is provided on the filter joint, a filter turntable is installed on the print head body corresponding to the filter joint, a plurality of filter screens are arranged at intervals circumferentially on the filter turntable, the filter turntable is sealingly plug-in connected to the mounting groove, the filter screen is clutched to the filter joint, and the filter turntable rotates to realize the switching of the filter screen in the filter joint.

[0019] Before the printed material enters the feeding channel, it is first filtered by the filter to prevent large particles of impurities from entering the feeding channel. On the one hand, it can prevent large particles of impurities from clogging the feeding channel and the discharge head, and on the other hand, it can prevent large particles of impurities from being printed on ceramic products and affecting the quality of ceramic products. After the filter has been used for a period of time, the filter turntable is rotated to deflect the filter placed in the filter joint outward, and the clean filter is turned inward into the filter joint for use. The filter deflected outside the filter joint is cleaned and put into use. Through this structural setting, the filter can be replaced without stopping the machine, which is convenient to operate.

[0020] Preferably, mounting holes are provided on the filter turntable corresponding to the filter screen, the filter screen is adaptably connected to the mounting holes, and an accommodating cavity is provided between the filter screen and the opening end of the mounting hole away from the feeding channel.

[0021] The filtered large impurities are placed in the accommodating chamber. When the filter screen is replaced, the large impurities in the accommodating chamber can be taken out of the filter joint for cleaning.

[0022] Another solution is to set a connecting seat and a filter plate at the feed port on the print head body, set a feed hole on the connecting seat, install a rotating wheel on the connecting seat, the rotating wheel is connected to a spirally arranged feeding blade, and the feeding blade is adapted to be installed in the feed hole; the feeding blade is connected to a scraper, and the scraper is close to the filter plate; a driving wheel is installed on the feeding screw, and the driving wheel is connected to the rotating wheel through transmission.

[0023] The rotation of the feed screw drives the feed blade to rotate, thereby pushing the printed material in the feed hole and transporting the printed material into the feed channel. The filter plate filters the printed material, and the scraper rotates with the feed blade to scrape and clean the surface of the filter plate. The scraping process can not only crush large particles of impurities, but also prevent the filter plate from being blocked.

[0024] Compared with the prior art, the beneficial effects of the present invention are: (1) The multi-channel 3D printing head of the present patent application can realize the selective printing, simultaneous extrusion printing and mixed extrusion printing of multiple printing materials; (2) The printing material is filtered before entering the feeding channel to prevent large particles of impurities from entering the feeding channel; (3) The printing material can be assisted in conveying at the feed inlet so that the printing material is pushed into the feeding channel. During the pushing process, filtering is achieved and the surface of the filter plate is scraped and cleaned. The scraping process can not only crush large particles of impurities, but also prevent the filter plate from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of embodiment 1 of the present invention.

[0026] Figure 2 It is a cross-sectional view of Example 1 of the present invention.

[0027] Figure 3 It is a schematic diagram of the structure of the print head body of Example 1 of the present invention.

[0028] Figure 4 It is a cross-sectional view of Example 2 of the present invention.

[0029] Figure 5 It is a cross-sectional view of embodiment 3 of the present invention.

[0030] Figure 6 It is a cross-sectional view of embodiment 4 of the present invention.

[0031] Figure 7 It is a cross-sectional view of Example 5 of the present invention.

[0032] In the figure: 1. print head body, 2. feeding channel, 3. feeding screw, 4. discharging head, 5. feeding port, 6. mounting seat, 7. feeding motor, 8. through slot, 9. anti-skid groove, 10. boss, 11. fastening ring, 12. fitting surface, 13. positioning ring, 14. anti-skid pattern, 15. filter joint, 16. mounting slot, 17. filter turntable, 18. filter screen, 19. accommodating chamber, 20. locking screw, 21. stirring and pushing impeller, 22. bracket, 23. stirring motor, 24. transmission shaft, 25. anti-rotation slot, 26. connecting slot, 27. extension hole, 28. plug, 29. connecting seat, 30. filter plate, 31. feeding hole, 32. rotating wheel, 33. feeding blade, 34. scraper, 35. driving wheel. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Embodiment 1: A multi-channel 3D printing head (see attached Figure 1 To Attachment Figure 3 ), including a print head body 1, on which at least two feeding channels 2 are arranged. In this embodiment, three feeding channels 2 are evenly distributed in the circumference, and the feeding channels 2 are arranged obliquely, and the feeding channels 2 gather toward the middle from top to bottom. A feeding screw 3 is installed in the feeding channel 2, and the lower part of the print head body 1 is detachably connected to the discharge head 4. The lower end of the feeding screw 3 is arranged near the discharge head 4, and the feeding channels 2 are all connected to the discharge head 4. Feed ports 5 are arranged on the print head body 1 and the feeding channels 2 in a one-to-one correspondence, and the feed ports 5 are connected to the feeding channels 2. An internal thread is arranged on the inner wall of the feed port 5 to facilitate connection with other components.

[0034] The corresponding position of the feeding channel 2 on the print head body 1 is threadedly connected to the mounting base 6, the feeding motor 7 is installed on the upper end of the mounting base 6, and a coupling is connected between the output shaft of the feeding motor 7 and the feeding screw 3. A plurality of through grooves 8 are circumferentially arranged on the outer wall of the mounting base 6, and a plurality of anti-slip grooves 9 are circumferentially arranged on the lower outer wall of the mounting base 6.

[0035] The discharge head 4 is a conical bucket-shaped structure with a larger upper part and a smaller lower part. The bucket-shaped structure of the discharge head 4 is conducive to the extrusion of the printing material and prevents clogging. A boss 10 is arranged at the lower part of the print head body 1. The outer diameter of the boss 10 is smaller than the outer diameter of the print head body 1. The boss 10 is detachably connected with a fastening ring 11, and the discharge head 4 is fastened between the fastening ring 11 and the boss 10. An external thread is arranged on the upper outer wall of the boss 10, and an internal thread is arranged on the inner wall of the fastening ring 11. The fastening ring 11 and the boss 10 are threadedly connected. The lower outer wall of the boss 10 gathers inward from top to bottom to form an inclined fitting surface 12, and the upper inner wall of the discharge head 4 fits with the fitting surface 12. A positioning ring 13 is installed between the fastening ring 11 and the discharge head 4. The inner wall of the positioning ring 13 fits with the outer wall of the discharge head 4. A convex block is arranged on the fastening ring 11, and the positioning ring 13 is fastened and installed between the convex block and the discharge head 4. A circle of anti-slip grooves 14 is arranged on the outer wall of the fastening ring 11 .

[0036] The multi-channel 3D printing head is installed on the ceramic product 3D printing device for use. The printing material is fed into the feeding channel 2 through the feed port 5. The feeding screw 3 in the feeding channel 2 rotates to realize the transportation of the printing material. Finally, the printing material is extruded from the discharge head 4 to print the ceramic product. Since at least two feeding channels 2 are set on the print head body 1, different feeding channels 2 can be loaded with printing materials of different colors and categories, and multiple feeding modes can be realized to meet various printing methods. For example, a single feeding screw 3 is selected to rotate, and other feeding screws 3 are stationary to realize the transportation of a single printing material, and then realize the printing operation of a single printing material. Or multiple feeding screws 3 are selected to rotate to realize the simultaneous transportation of multiple printing materials, and multiple printing materials are extruded at the same time to realize the printing of ceramic products, meeting the different process requirements of various types of ceramic products. In this application, the printing material is not stirred and mixed in the discharge head 4, and the multiple printing materials extruded from the discharge head 4 form a multi-strand long strip shape to meet the printing of colorful ceramic products. The multi-channel 3D printing head of this patent application can realize the selective printing, simultaneous extrusion printing and mixed extrusion printing of multiple printing materials.

[0037] Embodiment 2: A multi-channel 3D printing head (see attached Figure 4 ), including a print head body 1, on which at least two feeding channels 2 are arranged. In this embodiment, three feeding channels 2 are evenly distributed in the circumference, and the feeding channels 2 are arranged obliquely, and the feeding channels 2 gather toward the middle from top to bottom. A feeding screw 3 is installed in the feeding channel 2, and the lower part of the print head body 1 is detachably connected to the discharge head 4. The lower end of the feeding screw 3 is arranged near the discharge head 4, and the feeding channels 2 are all connected to the discharge head 4. Feed ports 5 are arranged on the print head body 1 and the feeding channels 2 in a one-to-one correspondence, and the feed ports 5 are connected to the feeding channels 2. An internal thread is arranged on the inner wall of the feed port 5 to facilitate connection with other components.

[0038] The corresponding position of the feeding channel 2 on the print head body 1 is threadedly connected to the mounting base 6, the feeding motor 7 is installed on the upper end of the mounting base 6, and a coupling is connected between the output shaft of the feeding motor 7 and the feeding screw 3. A plurality of through grooves 8 are circumferentially arranged on the outer wall of the mounting base 6, and a plurality of anti-slip grooves 9 are circumferentially arranged on the lower outer wall of the mounting base 6.

[0039] The discharge head 4 is a conical bucket-shaped structure with a larger upper part and a smaller lower part. The bucket-shaped structure of the discharge head 4 is conducive to the extrusion of the printing material and prevents clogging. A boss 10 is arranged at the lower part of the print head body 1. The outer diameter of the boss 10 is smaller than the outer diameter of the print head body 1. The boss 10 is detachably connected with a fastening ring 11, and the discharge head 4 is fastened between the fastening ring 11 and the boss 10. An external thread is arranged on the upper outer wall of the boss 10, and an internal thread is arranged on the inner wall of the fastening ring 11. The fastening ring 11 and the boss 10 are threadedly connected. The lower outer wall of the boss 10 gathers inward from top to bottom to form an inclined fitting surface 12, and the upper inner wall of the discharge head 4 fits with the fitting surface 12. A positioning ring 13 is installed between the fastening ring 11 and the discharge head 4. The inner wall of the positioning ring 13 fits with the outer wall of the discharge head 4. A convex block is arranged on the fastening ring 11, and the positioning ring 13 is fastened and installed between the convex block and the discharge head 4. A circle of anti-slip grooves 14 is arranged on the outer wall of the fastening ring 11 .

[0040] The feed port 5 is connected to the filter connector 15, and a mounting groove 16 is provided on the filter connector 15. The mounting groove 16 is arranged vertically. A filter turntable 17 is installed on the print head body 1 in correspondence with the filter connector 15. The filter turntable 17 is rotatably installed on the print head body 1. A plurality of filter screens 18 are arranged circumferentially at intervals on the filter turntable 17. The filter turntable 17 is sealed and plug-in connected with the mounting groove 16. The filter screen 18 is clutched with the filter connector 15. The filter turntable 17 rotates to realize the switching of the filter screen 18 in the filter connector 15. Mounting holes are provided on the filter turntable 17 in correspondence with the filter screen 18. The filter screen 18 is adapted to be connected with the mounting holes. An accommodating cavity 19 is provided between the filter screen 18 and the opening end of the mounting hole away from the feed channel 2. Locking holes are provided on the filter turntable 17 in correspondence with the mounting holes. A locking screw 20 is connected on the filter connector 15. The locking screw 20 is connected with the locking hole. The locking screw 20 is fastened and connected to both sides of the mounting groove 16.

[0041] Before the printed material enters the feeding channel 2, it is first filtered by the filter 18 to prevent large particles of impurities from entering the feeding channel 2. On the one hand, it can prevent large particles of impurities from clogging the feeding channel 2 and the discharge head 4, and on the other hand, it can prevent large particles of impurities from being printed on ceramic products and affecting the quality of ceramic products. After the filter 18 has been used for a period of time, the filter turntable 17 is rotated to deflect the filter 18 placed in the filter joint 15 outward, and the clean filter 18 is rotated inward into the filter joint 15 for use. The filter 18 deflected outside the filter joint 15 is cleaned and put into use. Through this structural setting, the filter 18 can be replaced without stopping the machine, and the operation is convenient.

[0042] The multi-channel 3D printing head is installed on the ceramic product 3D printing device for use. The printing material is fed into the feeding channel 2 through the feed port 5. The feeding screw 3 in the feeding channel 2 rotates to realize the transportation of the printing material. Finally, the printing material is extruded from the discharge head 4 to print the ceramic product. Since at least two feeding channels 2 are set on the print head body 1, different feeding channels 2 can be loaded with printing materials of different colors and categories, and multiple feeding modes can be realized to meet various printing methods. For example, a single feeding screw 3 is selected to rotate, and other feeding screws 3 are stationary to realize the transportation of a single printing material, and then realize the printing operation of a single printing material. Or multiple feeding screws 3 are selected to rotate to realize the simultaneous transportation of multiple printing materials, and multiple printing materials are extruded at the same time to realize the printing of ceramic products, meeting the different process requirements of various types of ceramic products. In this application, the printing material is not stirred and mixed in the discharge head 4, and the multiple printing materials extruded from the discharge head 4 form a multi-strand long strip shape to meet the printing of colorful ceramic products. The multi-channel 3D printing head of this patent application can realize the selective printing, simultaneous extrusion printing and mixed extrusion printing of multiple printing materials.

[0043] Embodiment 3: A multi-channel 3D printing head (see attached Figure 5 ), including a print head body 1, on which at least two feeding channels 2 are arranged. In this embodiment, three feeding channels 2 are evenly distributed in the circumference, and the feeding channels 2 are arranged obliquely, and the feeding channels 2 gather toward the middle from top to bottom. A feeding screw 3 is installed in the feeding channel 2, and the lower part of the print head body 1 is detachably connected to the discharge head 4. The lower end of the feeding screw 3 is arranged near the discharge head 4, and the feeding channels 2 are all connected to the discharge head 4. Feed ports 5 are arranged on the print head body 1 and the feeding channels 2 in a one-to-one correspondence, and the feed ports 5 are connected to the feeding channels 2. An internal thread is arranged on the inner wall of the feed port 5 to facilitate connection with other components.

[0044] The corresponding position of the feeding channel 2 on the print head body 1 is threadedly connected to the mounting base 6, the feeding motor 7 is installed on the upper end of the mounting base 6, and a coupling is connected between the output shaft of the feeding motor 7 and the feeding screw 3. A plurality of through grooves 8 are circumferentially arranged on the outer wall of the mounting base 6, and a plurality of anti-slip grooves 9 are circumferentially arranged on the lower outer wall of the mounting base 6.

[0045] The discharge head 4 is a conical bucket-shaped structure with a larger upper part and a smaller lower part. The bucket-shaped structure of the discharge head 4 is conducive to the extrusion of the printing material and prevents clogging. A boss 10 is arranged at the lower part of the print head body 1. The outer diameter of the boss 10 is smaller than the outer diameter of the print head body 1. The boss 10 is detachably connected with a fastening ring 11, and the discharge head 4 is fastened between the fastening ring 11 and the boss 10. An external thread is arranged on the upper outer wall of the boss 10, and an internal thread is arranged on the inner wall of the fastening ring 11. The fastening ring 11 and the boss 10 are threadedly connected. The lower outer wall of the boss 10 gathers inward from top to bottom to form an inclined fitting surface 12, and the upper inner wall of the discharge head 4 fits with the fitting surface 12. A positioning ring 13 is installed between the fastening ring 11 and the discharge head 4. The inner wall of the positioning ring 13 fits with the outer wall of the discharge head 4. A convex block is arranged on the fastening ring 11, and the positioning ring 13 is fastened and installed between the convex block and the discharge head 4. A circle of anti-slip grooves 14 is arranged on the outer wall of the fastening ring 11 .

[0046] The feed port 5 is connected to the filter connector 15, and a mounting groove 16 is provided on the filter connector 15. The mounting groove 16 is arranged vertically. A filter turntable 17 is installed on the print head body 1 in correspondence with the filter connector 15. The filter turntable 17 is rotatably installed on the print head body 1. A plurality of filter screens 18 are arranged circumferentially at intervals on the filter turntable 17. The filter turntable 17 is sealed and plug-in connected with the mounting groove 16. The filter screen 18 is clutched with the filter connector 15. The filter turntable 17 rotates to realize the switching of the filter screen 18 in the filter connector 15. Mounting holes are provided on the filter turntable 17 in correspondence with the filter screen 18. The filter screen 18 is adapted to be connected with the mounting holes. An accommodating cavity 19 is provided between the filter screen 18 and the opening end of the mounting hole away from the feed channel 2. Locking holes are provided on the filter turntable 17 in correspondence with the mounting holes. A locking screw 20 is connected on the filter connector 15. The locking screw 20 is connected with the locking hole. The locking screw 20 is fastened and connected to both sides of the mounting groove 16.

[0047] Before the printed material enters the feeding channel 2, it is first filtered by the filter 18 to prevent large particles of impurities from entering the feeding channel 2. On the one hand, it can prevent large particles of impurities from clogging the feeding channel 2 and the discharge head 4, and on the other hand, it can prevent large particles of impurities from being printed on ceramic products and affecting the quality of ceramic products. After the filter 18 has been used for a period of time, the filter turntable 17 is rotated to deflect the filter 18 placed in the filter joint 15 outward, and the clean filter 18 is rotated inward into the filter joint 15 for use. The filter 18 deflected outside the filter joint 15 is cleaned and put into use. Through this structural setting, the filter 18 can be replaced without stopping the machine, and the operation is convenient.

[0048] A stirring and pushing impeller 21 is rotatably installed in the discharge head 4, a bracket 22 is arranged in the discharge head 4, a mounting shaft is arranged in the middle of the stirring and pushing impeller 21, and the mounting shaft on the stirring and pushing impeller 21 is rotatably installed on the bracket 22. A stirring motor 23 is installed on the print head body 1, the stirring motor 23 is connected to the transmission shaft 24, and the stirring and pushing impeller 21 is detachably connected to the transmission shaft 24. An anti-rotation slot 25 is arranged at the lower end of the transmission shaft 24, and the upper end of the mounting shaft on the stirring and pushing impeller 21 is adapted to be connected with the anti-rotation slot 25, and the mounting shaft and the anti-rotation slot 25 are circumferentially locked. The upper part of the mounting shaft and the anti-rotation slot 25 are both square structures. A connecting groove 26 is arranged on the print head body 1, and an extension hole 27 is arranged at the bottom of the connecting groove 26, the stirring motor 23 is installed in the connecting groove 26, and the transmission shaft 24 is adapted to be installed in the extension hole 27.

[0049] When multiple feeding channels 2 are used to mix and transport multiple printing materials, the printing materials transported from the feeding channels 2 are first mixed in the discharge head 4. During mixing, the stirring motor 23 drives the stirring and pushing impeller 21 to rotate. The stirring and pushing impeller 21 stirs and mixes the mixed printing materials while pushing the mixed materials toward the outlet direction of the discharge head 4, so that the evenly mixed printing materials are extruded outward to perform 3D printing operations on ceramic products.

[0050] The multi-channel 3D printing head is installed on the ceramic product 3D printing equipment for use. The printing material is fed into the feeding channel 2 through the feed port 5. The feeding screw 3 in the feeding channel 2 rotates to realize the transportation of the printing material. Finally, the printing material is extruded from the discharge head 4 to print the ceramic product. Since at least two feeding channels 2 are arranged on the print head body 1, different feeding channels 2 can be loaded with printing materials of different colors and categories, and multiple feeding modes can be realized to meet various printing methods. For example, a single feeding screw 3 is selected to rotate, and other feeding screws 3 are stationary to realize the transportation of a single printing material, and then realize the printing operation of a single printing material. Alternatively, multiple feeding screws 3 are selected to rotate to realize the simultaneous transportation of multiple printing materials, and multiple printing materials are extruded at the same time to realize the printing of ceramic products, meeting the different process requirements of various types of ceramic products. In this embodiment, the printing material delivered from the feeding channel 2 is first mixed in the discharge head 4. During the mixing, the stirring motor 23 drives the stirring and pushing impeller 21 to rotate. The stirring and pushing impeller 21 stirs and mixes the mixed printing material while pushing the mixed material to be delivered toward the outlet direction of the discharge head 4, so that the evenly mixed printing material is extruded outward to perform the 3D printing operation of the ceramic product. The multi-channel 3D printing head of this patent application can realize the selective printing, simultaneous extrusion printing and mixed and then extruded printing of multiple printing materials.

[0051] Embodiment 4: A multi-channel 3D printing head (see attached Figure 6), including a print head body 1, on which at least two feeding channels 2 are arranged. In this embodiment, three feeding channels 2 are evenly distributed in the circumference, and the feeding channels 2 are arranged obliquely, and the feeding channels 2 gather toward the middle from top to bottom. A feeding screw 3 is installed in the feeding channel 2, and the lower part of the print head body 1 is detachably connected to the discharge head 4. The lower end of the feeding screw 3 is arranged near the discharge head 4, and the feeding channels 2 are all connected to the discharge head 4. Feed ports 5 are arranged on the print head body 1 and the feeding channels 2 in a one-to-one correspondence, and the feed ports 5 are connected to the feeding channels 2. An internal thread is arranged on the inner wall of the feed port 5 to facilitate connection with other components.

[0052] The corresponding position of the feeding channel 2 on the print head body 1 is threadedly connected to the mounting base 6, the feeding motor 7 is installed on the upper end of the mounting base 6, and a coupling is connected between the output shaft of the feeding motor 7 and the feeding screw 3. A plurality of through grooves 8 are circumferentially arranged on the outer wall of the mounting base 6, and a plurality of anti-slip grooves 9 are circumferentially arranged on the lower outer wall of the mounting base 6.

[0053] The discharge head 4 is a conical bucket-shaped structure with a larger upper part and a smaller lower part. The bucket-shaped structure of the discharge head 4 is conducive to the extrusion of the printing material and prevents clogging. A boss 10 is arranged at the lower part of the print head body 1. The outer diameter of the boss 10 is smaller than the outer diameter of the print head body 1. The boss 10 is detachably connected with a fastening ring 11, and the discharge head 4 is fastened between the fastening ring 11 and the boss 10. An external thread is arranged on the upper outer wall of the boss 10, and an internal thread is arranged on the inner wall of the fastening ring 11. The fastening ring 11 and the boss 10 are threadedly connected. The lower outer wall of the boss 10 gathers inward from top to bottom to form an inclined fitting surface 12, and the upper inner wall of the discharge head 4 fits with the fitting surface 12. A positioning ring 13 is installed between the fastening ring 11 and the discharge head 4. The inner wall of the positioning ring 13 fits with the outer wall of the discharge head 4. A convex block is arranged on the fastening ring 11, and the positioning ring 13 is fastened and installed between the convex block and the discharge head 4. A circle of anti-slip grooves 14 is arranged on the outer wall of the fastening ring 11 .

[0054] The feed port 5 is connected to the filter connector 15, and a mounting groove 16 is provided on the filter connector 15. The mounting groove 16 is arranged vertically. A filter turntable 17 is installed on the print head body 1 in correspondence with the filter connector 15. The filter turntable 17 is rotatably installed on the print head body 1. A plurality of filter screens 18 are arranged circumferentially at intervals on the filter turntable 17. The filter turntable 17 is sealed and plug-in connected with the mounting groove 16. The filter screen 18 is clutched with the filter connector 15. The filter turntable 17 rotates to realize the switching of the filter screen 18 in the filter connector 15. Mounting holes are provided on the filter turntable 17 in correspondence with the filter screen 18. The filter screen 18 is adapted to be connected with the mounting holes. An accommodating cavity 19 is provided between the filter screen 18 and the opening end of the mounting hole away from the feed channel 2. Locking holes are provided on the filter turntable 17 in correspondence with the mounting holes. A locking screw 20 is connected on the filter connector 15. The locking screw 20 is connected with the locking hole. The locking screw 20 is fastened and connected to both sides of the mounting groove 16.

[0055] Before the printed material enters the feeding channel 2, it is first filtered by the filter 18 to prevent large particles of impurities from entering the feeding channel 2. On the one hand, it can prevent large particles of impurities from clogging the feeding channel 2 and the discharge head 4, and on the other hand, it can prevent large particles of impurities from being printed on ceramic products and affecting the quality of ceramic products. After the filter 18 has been used for a period of time, the filter turntable 17 is rotated to deflect the filter 18 placed in the filter joint 15 outward, and the clean filter 18 is rotated inward into the filter joint 15 for use. The filter 18 deflected outside the filter joint 15 is cleaned and put into use. Through this structural setting, the filter 18 can be replaced without stopping the machine, and the operation is convenient.

[0056] A plurality of plugs 28 are arranged in the discharge head 4 and are adapted to the lower opening of the feeding channel 2. After the discharge head 4 is installed in place, the plugs 28 are correspondingly inserted into the lower end of the feeding channel 2 to block the feeding channel 2. When one or several feeding channels 2 need to be opened and other feeding channels 2 need to be closed, plugs 28 are arranged at the corresponding positions of the feeding channels 2 that need to be closed in the discharge head 4, and the plugs 28 are correspondingly inserted into the lower end of the feeding channel 2 to block the feeding channel 2. This facilitates the delivery of printing materials in a single channel or multiple channels.

[0057] The multi-channel 3D printing head is installed on a ceramic product 3D printing device for use. The printing material is fed into the feeding channel 2 through the feed port 5. The feeding screw 3 in the feeding channel 2 rotates to realize the transportation of the printing material. Finally, the printing material is extruded from the discharge head 4 to print the ceramic product. Since at least two feeding channels 2 are arranged on the print head body 1, different feeding channels 2 can be loaded with printing materials of different colors and categories, and multiple feeding modes can be realized to meet various printing methods. For example, a single feeding screw 3 is selected to rotate, other feeding screws 3 are stationary, and other feeding channels 2 are blocked by plugs 28 to realize the transportation of a single printing material, and then realize the printing operation of a single printing material. Or multiple feeding screws 3 are selected to rotate to realize the simultaneous transportation of multiple printing materials, and multiple printing materials are extruded simultaneously to realize the printing of ceramic products, meeting the different process requirements of various types of ceramic products. The multi-channel 3D printing head of this patent application can realize the selective printing, simultaneous extrusion printing and mixed extrusion printing of multiple printing materials.

[0058] Embodiment 5: A multi-channel 3D printing head (see attached Figure 7), including a print head body 1, on which at least two feeding channels 2 are arranged. In this embodiment, three feeding channels 2 are evenly distributed in the circumference, and the feeding channels 2 are arranged obliquely, and the feeding channels 2 gather toward the middle from top to bottom. A feeding screw 3 is installed in the feeding channel 2, and the lower part of the print head body 1 is detachably connected to the discharge head 4. The lower end of the feeding screw 3 is arranged near the discharge head 4, and the feeding channels 2 are all connected to the discharge head 4. Feed ports 5 are arranged on the print head body 1 and the feeding channels 2 in a one-to-one correspondence, and the feed ports 5 are connected to the feeding channels 2. An internal thread is arranged on the inner wall of the feed port 5 to facilitate connection with other components.

[0059] The corresponding position of the feeding channel 2 on the print head body 1 is threadedly connected to the mounting base 6, the feeding motor 7 is installed on the upper end of the mounting base 6, and a coupling is connected between the output shaft of the feeding motor 7 and the feeding screw 3. A plurality of through grooves 8 are circumferentially arranged on the outer wall of the mounting base 6, and a plurality of anti-slip grooves 9 are circumferentially arranged on the lower outer wall of the mounting base 6.

[0060] The discharge head 4 is a conical bucket-shaped structure with a larger upper part and a smaller lower part. The bucket-shaped structure of the discharge head 4 is conducive to the extrusion of the printing material and prevents clogging. A boss 10 is arranged at the lower part of the print head body 1. The outer diameter of the boss 10 is smaller than the outer diameter of the print head body 1. The boss 10 is detachably connected with a fastening ring 11, and the discharge head 4 is fastened between the fastening ring 11 and the boss 10. An external thread is arranged on the upper outer wall of the boss 10, and an internal thread is arranged on the inner wall of the fastening ring 11. The fastening ring 11 and the boss 10 are threadedly connected. The lower outer wall of the boss 10 gathers inward from top to bottom to form an inclined fitting surface 12, and the upper inner wall of the discharge head 4 fits with the fitting surface 12. A positioning ring 13 is installed between the fastening ring 11 and the discharge head 4. The inner wall of the positioning ring 13 fits with the outer wall of the discharge head 4. A convex block is arranged on the fastening ring 11, and the positioning ring 13 is fastened and installed between the convex block and the discharge head 4. A circle of anti-slip grooves 14 is arranged on the outer wall of the fastening ring 11 .

[0061] A connection seat 29 and a filter plate 30 are provided at the feed port 5 on the print head body 1. The filter plate 30 is detachably installed in the feed port 5. A feed hole 31 is provided on the connection seat 29. A rotating wheel 32 is installed on the connection seat 29. The rotating wheel 32 is connected to a spirally arranged feed blade 33. The feed blade 33 is adapted to be installed in the feed hole 31. A long axis is provided at the center of the feed blade 33. The feed blade 33 is connected to a scraper 34. The scraper 34 is close to the filter plate 30. A driving wheel 35 is installed on the feed screw 3. The driving wheel 35 is transmission-connected to the rotating wheel 32. The driving wheel 35 and the rotating wheel 32 are transmission-connected through a bevel gear structure. The rotation of the feed screw 3 drives the feed blade 33 to rotate, thereby pushing the printed material in the feed hole 31 and transporting the printed material to the feed channel 2. The filter plate 30 filters the printed material, and the scraper 34 rotates with the feed blade 33 to scrape and clean the surface of the filter plate 30. The scraping process can not only crush large particles of impurities, but also prevent the filter plate 30 from being blocked.

[0062] A stirring and pushing impeller 21 is rotatably installed in the discharge head 4, a bracket 22 is arranged in the discharge head 4, a mounting shaft is arranged in the middle of the stirring and pushing impeller 21, and the mounting shaft on the stirring and pushing impeller 21 is rotatably installed on the bracket 22. A stirring motor 23 is installed on the print head body 1, the stirring motor 23 is connected to the transmission shaft 24, and the stirring and pushing impeller 21 is detachably connected to the transmission shaft 24. An anti-rotation slot 25 is arranged at the lower end of the transmission shaft 24, and the upper end of the mounting shaft on the stirring and pushing impeller 21 is adapted to be connected with the anti-rotation slot 25, and the mounting shaft and the anti-rotation slot 25 are circumferentially locked. The upper part of the mounting shaft and the anti-rotation slot 25 are both square structures. A connecting groove 26 is arranged on the print head body 1, and an extension hole 27 is arranged at the bottom of the connecting groove 26, the stirring motor 23 is installed in the connecting groove 26, and the transmission shaft 24 is adapted to be installed in the extension hole 27.

[0063] When multiple feeding channels 2 are used to mix and transport multiple printing materials, the printing materials transported from the feeding channels 2 are first mixed in the discharge head 4. During mixing, the stirring motor 23 drives the stirring and pushing impeller 21 to rotate. The stirring and pushing impeller 21 stirs and mixes the mixed printing materials while pushing the mixed materials toward the outlet direction of the discharge head 4, so that the evenly mixed printing materials are extruded outward to perform 3D printing operations on ceramic products.

[0064] The multi-channel 3D printing head is installed on the ceramic product 3D printing equipment for use. The printing material is fed into the feeding channel 2 through the feed port 5. The feeding screw 3 in the feeding channel 2 rotates to realize the transportation of the printing material. Finally, the printing material is extruded from the discharge head 4 to print the ceramic product. Since at least two feeding channels 2 are arranged on the print head body 1, different feeding channels 2 can be loaded with printing materials of different colors and categories, and multiple feeding modes can be realized to meet various printing methods. For example, a single feeding screw 3 is selected to rotate, and other feeding screws 3 are stationary to realize the transportation of a single printing material, and then realize the printing operation of a single printing material. Alternatively, multiple feeding screws 3 are selected to rotate to realize the simultaneous transportation of multiple printing materials, and multiple printing materials are extruded at the same time to realize the printing of ceramic products, meeting the different process requirements of various types of ceramic products. In this embodiment, the printing material delivered from the feeding channel 2 is first mixed in the discharge head 4. During the mixing, the stirring motor 23 drives the stirring and pushing impeller 21 to rotate. The stirring and pushing impeller 21 stirs and mixes the mixed printing material while pushing the mixed material to be delivered toward the outlet direction of the discharge head 4, so that the evenly mixed printing material is extruded outward to perform the 3D printing operation of the ceramic product. The multi-channel 3D printing head of this patent application can realize the selective printing, simultaneous extrusion printing and mixed and then extruded printing of multiple printing materials.

[0065] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A multi-channel 3D printing head, characterized in that: It includes a print head body, at least two feeding channels are arranged on the print head body, feeding screws are installed in the feeding channels, the lower part of the print head body is detachably connected to the discharge head, the feeding channels are connected to the discharge head, and feed ports are arranged on the print head body and in one-to-one correspondence with the feeding channels.

2. A multi-channel 3D printing head according to claim 1, characterized in that: The discharge head is a conical bucket structure that is larger at the top and smaller at the bottom.

3. A multi-channel 3D printing head according to claim 1, characterized in that: A boss is arranged at the lower part of the print head body, a fastening ring is detachably connected to the boss, and the discharge head is fastened between the fastening ring and the boss.

4. A multi-channel 3D printing head according to claim 3, characterized in that: The outer wall of the lower part of the boss gathers inward from top to bottom to form an inclined fitting surface, and the upper inner wall of the discharge head is adapted to fit with the fitting surface.

5. A multi-channel 3D printing head according to claim 1, characterized in that: A plurality of plugs adapted to the lower opening of the feeding channel are arranged in the discharge head. After the discharge head is installed in place, the plugs are correspondingly inserted into the lower end of the feeding channel to block the feeding channel.

6. A multi-channel 3D printing head according to claim 1, characterized in that: A rotatable stirring and pushing impeller is installed in the discharge head, a stirring motor is installed on the print head body, the stirring motor is connected to the transmission shaft, and the stirring and pushing impeller is detachably connected to the transmission shaft.

7. A multi-channel 3D printing head according to claim 1, characterized in that: The feeding channel is arranged obliquely, and the feeding channel converges toward the middle from top to bottom.

8. A multi-channel 3D printing head according to claim 1, characterized in that: The feed port is connected to the filter joint, a mounting groove is arranged on the filter joint, a filter turntable is installed on the print head body corresponding to the filter joint, a plurality of filter screens are arranged at intervals circumferentially on the filter turntable, the filter turntable is sealed and plug-in connected to the mounting groove, the filter screen and the filter joint are clutched, and the filter turntable rotates to realize the switching of the filter screen in the filter joint.

9. A multi-channel 3D printing head according to claim 8, characterized in that: The filter turntable is provided with mounting holes corresponding to the filter screen, the filter screen is adapted to be connected with the mounting holes, and an accommodating cavity is provided between the filter screen and the opening end of the mounting hole away from the feeding channel.

10. A multi-channel 3D printing head according to any one of claims 1 to 9, characterized in that: A connecting seat and a filter plate are arranged at the feed port on the print head body, a feed hole is arranged on the connecting seat, a rotating wheel is installed on the connecting seat, the rotating wheel is connected to a spirally arranged feeding blade, and the feeding blade is adapted to be installed in the feed hole; the feeding blade is connected to a scraper, and the scraper is close to the filter plate; a driving wheel is installed on the feeding screw, and the driving wheel is connected to the rotating wheel through transmission.

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