Modularized powder box of 3D printer

Abstract

The invention relates to the technical field of printer powder boxes, and discloses a modularized powder box of a 3D printer, the modularized powder box comprises a modularized powder box mechanism, the modularized powder box mechanism comprises a transparent powder box, a powder box connecting piece, a powder valve seat and a valve shaft, four powder cavities are formed in the transparent powder box in an isolated mode, and the powder box connecting piece is connected to the bottom of the transparent powder box; powder flow channels are formed in the positions, corresponding to the four powder cavities, of the powder box connecting piece in a penetrating mode, the bottoms of the powder cavities are open, the powder valve seat is connected to the bottom of the powder box connecting piece, a shaft hole is formed in one end of the powder valve seat in the length direction in a penetrating mode, the valve shaft is in interference fit with the shaft hole, and four channels are formed in the top of the powder valve seat in the axial direction of the valve shaft in a penetrating mode. Four channels are formed in the side wall of the valve shaft in the axial direction of the valve shaft in a penetrating mode, the four valve shaft channels correspond to the four channels in a one-to-one mode, storage of multi-element powder is achieved, and the requirement for simultaneous printing of diversified powder in single-time printing is met.

Description

Technical Field

[0001] The present invention relates to the technical field of printer powder boxes, and in particular to a modular powder box for a 3D printer. Background Art

[0002] The printing principle of existing metal 3D printers is metal powder melting technology. During the entire printing process, metal powder needs to be continuously transported to the printing site (each layer is printed and a layer of powder is transported). The storage and transportation of metal powder is also a technical point of metal 3D printers. When storing powder, it is necessary to consider the impact of air on powder. When transporting powder, it is also necessary to consider the impact of air on powder. It is also necessary to consider the uniformity of powder after it is transported to the printing site. The mainstream powder feeding methods of 3D printers on the market are top powder feeding, bottom powder feeding, and powder feeder powder feeding. In the upper powder feeding mode, the powder bin and the forming cylinder are side by side, and the powder is transferred by a scraper. Its working method is as follows: the scraper is on the far right → the piston cylinder in the powder supply cylinder lifts the powder by one layer → the scraper moves toward the forming cylinder → scrapes the powder from the powder supply cylinder to the forming cylinder → laser sintering and printing → the scraper returns to the right → the next cycle; in the lower powder feeding mode, the powder bin is above the forming cylinder (it can also be understood as the powder bin is above the forming chamber), and its main working method is as follows: the scraper returns to the reset point → takes a layer of powder in the powder bin through the powder taking structure and drops it to the bottom plate of the forming chamber through the powder channel → the scraper moves (towards the printing substrate) → laser sintering and printing → the scraper resets again → enters the cycle; in the powder feeder powder feeding mode, the powder bin exists alone, and its printing is different from the previous two. Its powder feeding method is suitable for sintering and printing at the same time, and its main powder feeding method has an independent structure to provide function. In summary, the existing powder supply methods require external power to take powder to meet the function of quantitative powder taking, and during the powder adding process in the silo, the metal powder is very likely to be affected by the air (the influence of air humidity on the dryness of the powder); and only one kind of element powder can be placed in the silo, which cannot meet the needs of diversified powder printing. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a modular powder box for a 3D printer to achieve the storage of multi-element powders to meet the simultaneous printing of diversified powders in a single print.

[0004] The objective of the present invention is achieved through the following technical solutions: a modular powder box of a 3D printer, comprising a modular powder box mechanism, the modular powder box mechanism comprising a transparent powder box, a powder box connector, a powder valve seat and a valve shaft, the transparent powder box is provided with four powder chambers isolated inside for storing powders of different elements, the powder box connector is connected to the bottom of the transparent powder box, the positions of the powder chambers corresponding to the four chambers of the powder box connector are all penetrated with powder flow channels, the bottom opening of the powder chamber is used to communicate with the powder flow channels, the powder valve seat is connected to the bottom of the powder box connector, one end of the powder valve seat is penetrated with an axial hole along its own length direction, the valve shaft is interference fit in the axial hole, the top of the powder valve seat is penetrated with four channels along the axial direction of the valve shaft, the four channels are connected to the four powder flow channels one by one, the side wall of the valve shaft is penetrated with four valve shaft channels along its own axial direction, the four valve shaft channels correspond to the four channels one by one, and the valve shaft connects or closes the powder flow channel with the channel by rotation.

[0005] In some embodiments, a lower frame-shaped piece is fixed to the bottom of the transparent powder box, a boss is formed on the inner wall of the powder box connector, the lower frame-shaped piece is adapted in the powder box connector and supported by the boss, the outer wall of the lower frame-shaped piece fits into the inner wall of the powder box connector, and a powder box screw is passed through the side wall of the powder box connector, and the powder box screw is threadedly connected to the lower frame-shaped piece.

[0006] In some embodiments, the size of the powder flow channel gradually decreases in a direction approaching the powder valve seat, and the bottom size of the powder flow channel is the same as the size of the channel.

[0007] In some embodiments, a power assembly is provided at one end of the valve shaft, and the power assembly includes a power housing and a power servo. The power housing is installed at one end of the powder box connector, and the power servo is installed on the end surface of the power housing close to the powder valve seat. The output shaft of the power servo is transmission-connected to one end of the valve shaft.

[0008] In some embodiments, the power assembly also includes a battery compartment, a battery mounting hole is formed on the end face of the power housing away from the powder box connector, the battery compartment is assembled in the battery mounting hole, a button battery is arranged in the battery compartment, an end of the battery compartment away from the powder box connector is provided with an external thread, the battery mounting hole is provided with an internal thread, the battery compartment thread is adapted to be in the battery mounting hole, and the battery compartment is used to supply power to the power servo.

[0009] In some embodiments, the modular powder box mechanism is installed on the bidirectional scraper mechanism, and the bidirectional scraper mechanism includes a scraper main frame, a powder limiting member and a scraper assembly. The scraper main frame is provided with an installation channel along its own height direction, and the powder valve seat is installed in the installation channel. The powder limiting member is installed at the bottom of the scraper main frame. The powder limiting member is provided with four powder channels along its own height direction, and the four powder channels correspond to the four channels one by one. The scraper assembly is arranged on both sides of the scraper main frame in the width direction, and the scraper assembly includes a scraper adjusting member, a scraper fixing member and a scraper strip. The scraper adjusting member is installed on the scraper main frame, the scraper fixing member is connected to the side wall of the scraper adjusting member, and the scraper strip is installed at the bottom of the scraper fixing member.

[0010] In some embodiments, a rectangular table is integrally formed on both sides of the scraper main frame, and a leveling assembly is provided at both ends of the rectangular table. The leveling assembly includes a micrometer head and a tension spring. The scraper adjustment piece is installed on the scraper main frame by screws, and the scraper adjustment piece is located below the rectangular table. The two ends of the tension spring are respectively connected to the rectangular table and the scraper adjustment piece. The micrometer head is installed on the top of the rectangular table, and an adjustment hole is opened through the rectangular table. The telescopic head of the micrometer head passes through the adjustment hole and abuts against the scraper adjustment piece.

[0011] In some embodiments, a tension spring hole is formed through the rectangular platform, a tension spring screw is threadedly connected to the side wall of the rectangular platform, the tension spring screw passes through the tension spring hole, a mounting hole is formed on the top of the scraper adjustment member, a cotter pin is formed through the side wall of the scraper adjustment member, the cotter pin passes through the mounting hole, and the two ends of the tension spring are respectively mounted on the tension spring screw and the cotter pin.

[0012] In some embodiments, the scraper fixing member includes two half-shaped fixing members, and the two half-shaped fixing members are arranged and connected along the width direction of the scraper main body frame, and the top of the scraper strip is clamped between the two half-shaped fixing members.

[0013] In some embodiments, at least one protrusion is integrally formed on both sides of the scraper strip, and a limiting groove is provided on the end surface of the half-molded fixing piece close to the scraper strip, and the protrusion is fitted in the limiting groove.

[0014] The beneficial effects of the present invention are:

[0015] 1. Realize the storage of multi-element powders to meet the simultaneous printing of diversified powders in a single print.

[0016] 2. The transparent powder box and the powder box connector are connected to the inside of the powder valve seat and sealed outside. The powder flow channel is connected or closed by the rotation of the valve shaft, so that the powder delivery environment is sealed to avoid contact between powder and air during the powder adding process and reduce the impact of powder quality on the printed product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a modular powder box mechanism in a modular powder box of a 3D printer of the present invention;

[0018] Figure 2 A cross-sectional view of a modular powder box mechanism in a modular powder box of a 3D printer according to the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of a valve shaft in a modular powder box of a 3D printer of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of a powder valve seat in a modular powder box of a 3D printer of the present invention;

[0021] Figure 5 It is a structural schematic diagram of a powder box connector in a modular powder box of a 3D printer of the present invention;

[0022] Figure 6 It is a structural schematic diagram of a transparent powder box in a modular powder box of a 3D printer of the present invention;

[0023] Figure 7 A schematic diagram of the structure of a modular powder box of a 3D printer of the present invention Figure 1 ;

[0024] Figure 8 A schematic diagram of the structure of a modular powder box of a 3D printer of the present invention Figure 2 ;

[0025] Fig. 9 It is a structural schematic diagram of a scraper main frame in a modular powder box of a 3D printer of the present invention;

[0026] Fig.10 It is a schematic structural diagram of a powder limiting member in a modular powder box of a 3D printer of the present invention;

[0027] Fig.11 It is a front view of a modular powder box of a 3D printer of the present invention;

[0028] Fig.12 It is a left view of a modular powder box of a 3D printer of the present invention;

[0029] In the figure, 1-bidirectional scraper mechanism, 2-modular powder box mechanism, 3-scraper main frame, 4-powder limiting member, 5-installation channel, 6-powder channel, 7-scraper adjusting member, 8-scraper fixing member, 9-scraper strip, 10-transparent powder box, 11-powder box connecting member, 12-powder chamber, 13-powder flow channel, 14-rectangular table, 15-thousandth head, 16-tension spring, 17-screw, 18-adjustment hole, 19-tension spring hole, 20-tension spring screw, 21-installation hole, 22-open pin, 23-protrusion, 24-limiting groove, 28-powder valve seat, 29-valve shaft, 30-valve shaft channel, 31-shaft hole, 32-channel, 33-lower frame member, 34-boss, 35-powder box screw, 36-power box, 37-power servo, 38-battery installation hole, 39-battery compartment, 40-button battery. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0031] like Figures 1 to 12 As shown, a modular powder box of a 3D printer includes a modular powder box mechanism 2, which includes a transparent powder box 10, a powder box connector 11, a powder valve seat 28 and a valve shaft 29. The transparent powder box 10 is internally isolated with four powder chambers 12 for storing powders of different elements. The powder box connector 11 is connected to the bottom of the transparent powder box 10. The positions of the powder box connector 11 corresponding to the four powder chambers 12 are all penetrated with powder flow channels 13. The bottom opening of the powder chamber 12 is used to connect the powder flow channels 13. The powder valve seat 28 is connected to the bottom of the powder box connector 11. One end of the powder valve seat 28 is penetrated with an axial hole 31 along its own length direction. The valve shaft 29 is interference-fitted in the axial hole 31. The top of the powder valve seat 28 is penetrated with four channels 32 along the axial direction of the valve shaft 29. The four channels 32 are connected to the four powder flow channels 13 one by one. The side wall of the valve shaft 29 Four valve shaft channels 30 are provided along the axial direction thereof, and the four valve shaft channels 30 correspond to the four channels 32 one by one. The valve shaft 29 connects or closes the powder flow channel 13 and the channel 32 by rotating. The valve shaft 29 is interference fit in the shaft hole 31, so that the outer wall of the valve shaft 29 is tightly fitted with the inner wall of the shaft hole 31 to prevent powder from entering between the valve shaft 29 and the shaft hole 31. The valve shaft 29 is rotated to connect the upper and lower ends of the valve shaft channel 30 with the powder flow channel 13 and the channel 32 respectively, so that the powder in the powder chamber 12 flows out through the powder flow channel 12, the valve shaft channel 30, and the channel 32 in turn to perform the powder spreading action. The valve shaft 29 is rotated to make the valve shaft channel 30 of the valve shaft 29 fit the side wall of the shaft hole 31, so that the powder flow channel 13 and the channel 32 are blocked by the valve shaft 29, thereby preventing the powder from flowing down, and realizing the storage of multi-element powder to meet the simultaneous printing of diversified powders in a single printing.

[0032] In some embodiments, Figures 1 to 6 As shown, a lower frame-shaped member 33 is fixed to the bottom of the transparent powder box 10, and a boss 34 is formed on the inner wall of the powder box connector 11. The lower frame-shaped member 33 is adapted in the powder box connector 11 and supported by the boss 34. The outer wall of the lower frame-shaped member 33 fits the inner wall of the powder box connector 11, and a powder box screw 35 is penetrated through the side wall of the powder box connector 11. The powder box screw 35 is threadedly connected to the lower frame-shaped member 33, so that the connection position between the transparent powder box 10 and the powder box connector 11 is in a sealed state to prevent powder overflow. The size of the powder flow channel 13 gradually decreases in the direction close to the powder valve seat 28, and the bottom size of the powder flow channel 13 is the same as the size of the channel 32, so that the powder can completely enter the channel 32 through the powder flow channel 13 and be discharged completely through the channel 32, so that the powder can be fully utilized, and the powder feeding environment is in a sealed state, so as to avoid the contact between the powder and the air during the powder adding process, and reduce the influence of the powder quality on the printed product.

[0033] In some embodiments, Figures 2 to 6 As shown, a power assembly is provided at one end of the valve shaft 29, and the power assembly includes a power box 36 and a power steering gear 37. The power box 36 is installed at one end of the powder box connector 11, and the end surface of the power box 36 close to the powder valve seat 28 is installed with a power steering gear 37. The output shaft of the power steering gear 37 is connected to one end of the valve shaft 29. The power assembly also includes a battery compartment 39. The end surface of the power box 36 away from the powder box connector 11 is provided with a battery installation hole 38. The battery compartment 39 is assembled in the battery installation hole 38, and a button is provided in the battery compartment 39. Battery 40, the end of the battery compartment 39 away from the powder box connector 11 is provided with an external thread, and the battery mounting hole 38 is provided with an internal thread. The battery compartment 39 thread is adapted in the battery mounting hole 38, and the battery compartment 39 is used to supply power to the power servo 37. The battery compartment 39 is installed on the power box 36 by means of threads, which is convenient for installing and removing the battery compartment 39 to replace the button battery 40. The power servo 37 is powered by the battery compartment 39, and the valve shaft 29 is driven to rotate by the power servo 37 to realize the connection or closing of the powder flow channel 13 and the channel 32.

[0034] In some embodiments, Figures 7 to 12As shown, the modular powder box mechanism 2 is installed on the bidirectional scraper mechanism 1, and the bidirectional scraper mechanism 1 includes a scraper main frame 3, a powder limiting member 4 and a scraper assembly. The scraper main frame 3 is penetrated with an installation channel 5 along its own height direction, and the powder valve seat 28 is installed in the installation channel 5. The powder limiting member 4 is installed at the bottom of the scraper main frame 3. The powder limiting member 4 is penetrated with four powder channels 6 along its own height direction. The four powder channels 6 correspond to the four channels 32 one by one. Scraper assemblies are arranged on both sides of the scraper main frame 3 in the width direction. The scraper assembly includes a scraper adjusting member 7, a scraper fixing member 8 and The scraper bar 9 and the scraper adjustment member 7 are installed on the scraper main body frame 3, the scraper fixing member 8 is connected to the side wall of the scraper adjusting member 7, the scraper bar 9 is installed at the bottom of the scraper fixing member 8, and the powder flowing out through the channel 32 enters the four powder channels 6 respectively, and flows into the bottom surface of the molding chamber through the powder channel 6. The scraper device moves left and right as a whole to drive the scraper bar 9 to move and spread the powder. Since two sets of scraper assemblies are provided, a two-way powder spreading function is realized. The action flow of the scraper bar 9 is: reset → scraper bar 9 moves to the right → laser sintering printing → scraper bar moves to the left → laser sintering printing → enters the cycle.

[0035] In some embodiments, Figure 7 and Figure 8 As shown, both sides of the scraper main frame 3 are integrally formed with a rectangular platform 14, and both ends of the rectangular platform 14 are provided with a leveling component, the leveling component includes a micrometer head 15 and a tension spring 16, the scraper adjustment member 7 is installed on the scraper main frame 3 by a screw 17, the scraper adjustment member 7 is located below the rectangular platform 14, and the two ends of the tension spring 16 are respectively connected to the rectangular platform 14 and the scraper adjustment member 7, the micrometer head 15 is installed on the top of the rectangular platform 14, and an adjustment hole 18 is opened on the rectangular platform 14, and the telescopic head of the micrometer head 15 passes through the adjustment hole 18 and abuts against the scraper adjustment member 7. Before leveling the scraper adjustment member 7, first install the scraper adjustment member 7 on the scraper main frame 3 by screws 17, and the screws 17 are in an untightened state. Then measure the height of the two ends of the scraper adjustment member 7 by a measuring tool, and adjust the micrometer head 15 at the corresponding position according to the height error, so that the telescopic head of the micrometer head 15 pushes the scraper adjustment member 7 to deflect, and the rectangular table 14 and the scraper adjustment member 7 are mutually tightened by the tension spring 16. After the leveling is completed, tighten the screws 17 to lock the scraper adjustment member 7 on the scraper main frame 3 to ensure the parallelism of the scraper assembly. It is worth noting that the size of the through hole for the screw 17 to pass through the scraper adjustment member 7 is larger than the size of the screw 17, so that there is a relative space between the screw 17 and the scraper adjustment member 7 before it is tightened, which is convenient for adjusting the position of the scraper adjustment member 7 to make it leveled. After the screws 17 are tightened, the scraper adjustment member 7 is pressed against the scraper main frame 3 to complete the leveling installation of the scraper adjustment member 7.

[0036] Furthermore, a tension spring hole 19 is opened through the rectangular table 14, and a tension spring screw 20 is threadedly connected to the side wall of the rectangular table 14. The tension spring screw 20 passes through the tension spring hole 19. A mounting hole 21 is opened on the top of the scraper adjustment member 7, and a cotter pin 22 is passed through the side wall of the scraper adjustment member 7. The cotter pin 22 passes through the mounting hole 21. The two ends of the tension spring 16 are respectively sleeved on the tension spring screw 20 and the cotter pin 22, and the two ends of the tension spring 16 are detachably connected to the rectangular table 14 and the scraper adjustment member 7, which is convenient for installation and disassembly.

[0037] In some embodiments, Figures 7 to 12 As shown, the scraper fixing member 8 includes two half-type fixing members, and the two half-type fixing members are arranged and connected along the width direction of the scraper main frame 3. The top of the scraper strip 9 is clamped between the two half-type fixing members, and the two half-type fixing members are connected by fixing screws, which is convenient for connecting and disassembling the two half-type fixing members, and convenient for replacing and installing the scraper strip 9. Both sides of the scraper strip 9 are integrally formed with at least one protrusion 23, and the end surface of the half-type fixing member close to the scraper strip 9 is provided with a limiting groove 24, and the protrusion 23 is adapted in the limiting groove 24, so as to enhance the connection strength between the scraper strip 9 and the scraper fixing member 8, so that the position of the scraper strip 9 will not change during the printing process.

[0038] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; and it is known to those skilled in the art that the beneficial effects to be achieved by the present invention are only to achieve better beneficial effects under specific circumstances compared with the current implementation schemes in the prior art, rather than to directly achieve the best use effect in the industry.

[0039] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A modular powder box for a 3D printer, comprising a modular powder box mechanism (2), characterized in that: The modular powder box mechanism (2) comprises a transparent powder box (10), a powder box connector (11), a powder valve seat (28) and a valve shaft (29); the transparent powder box (10) is provided with four isolated powder chambers (12) inside for storing powders of different elements; the powder box connector (11) is connected to the bottom of the transparent powder box (10); the positions of the four powder chambers (12) corresponding to the powder chambers (12) of the powder box connector (11) are all penetrated by powder flow channels (13); the bottom of the powder chamber (12) is open for connecting the powder flow channels (13); the powder valve seat (28) is connected to the bottom of the powder box connector (11); the powder One end of the final valve seat (28) is provided with an axial hole (31) penetrating along its length direction, and the valve shaft (29) is interference-fitted in the axial hole (31). The top of the powder valve seat (28) is provided with four channels (32) penetrating along the axial direction of the valve shaft (29), and the four channels (32) are connected to the four powder flow channels (13) in a one-to-one correspondence. The side wall of the valve shaft (29) is provided with four valve shaft channels (30) penetrating along its axial direction, and the four valve shaft channels (30) are connected to the four channels (32) in a one-to-one correspondence. The valve shaft (29) is rotated to connect or close the powder flow channel (13) with the channel (32).

2. A modular powder box for a 3D printer according to claim 1, characterized in that: A lower frame-shaped member (33) is fixed to the bottom of the transparent powder box (10), and a boss (34) is formed on the inner wall of the powder box connecting member (11). The lower frame-shaped member (33) is adapted in the powder box connecting member (11) and supported by the boss (34). The outer wall of the lower frame-shaped member (33) fits the inner wall of the powder box connecting member (11), and a powder box screw (35) is passed through the side wall of the powder box connecting member (11), and the powder box screw (35) is threadedly connected to the lower frame-shaped member (33).

3. A modular powder box for a 3D printer according to claim 2, characterized in that: The size of the powder flow channel (13) gradually decreases in a direction approaching the powder valve seat (28), and the bottom size of the powder flow channel (13) is the same as the size of the channel (32).

4. The modular powder box of a 3D printer according to claim 3, characterized in that: A power assembly is provided at one end of the valve shaft (29), and the power assembly includes a power box (36) and a power servo (37). The power box (36) is installed at one end of the powder box connector (11). The power servo (37) is installed on the end surface of the power box (36) close to the powder valve seat (28). The output shaft of the power servo (37) is transmission-connected to one end of the valve shaft (29).

5. The modular powder box of a 3D printer according to claim 4, characterized in that: The power assembly further comprises a battery compartment (39); a battery mounting hole (38) is provided on the end surface of the power housing (36) away from the powder box connector (11); the battery compartment (39) is assembled in the battery mounting hole (38); a button battery (40) is arranged in the battery compartment (39); an end of the battery compartment (39) away from the powder box connector (11) is provided with an external thread; the battery mounting hole (38) is provided with an internal thread; the battery compartment (39) is threadedly adapted in the battery mounting hole (38); and the battery compartment (39) is used to supply power to the power servo (37).

6. The modular powder box of a 3D printer according to claim 1, characterized in that: The modular powder box mechanism (2) is mounted on the bidirectional scraper mechanism (1), and the bidirectional scraper mechanism (1) comprises a scraper main frame (3), a powder limiting member (4) and a scraper assembly. The scraper main frame (3) is provided with a mounting channel (5) along its height direction, and the powder valve seat (28) is mounted in the mounting channel (5). The powder limiting member (4) is mounted at the bottom of the scraper main frame (3). The powder limiting member (4) is provided with four powder valves along its height direction. The scraper main frame (3) has a plurality of powder channels (6), the four powder channels (6) correspond to the four channels (32) one by one, the scraper assembly is arranged on both sides of the scraper main frame (3) in the width direction, the scraper assembly comprises a scraper adjusting member (7), a scraper fixing member (8) and a scraper strip (9), the scraper adjusting member (7) is mounted on the scraper main frame (3), the scraper fixing member (8) is connected to the side wall of the scraper adjusting member (7), and the scraper strip (9) is mounted on the bottom of the scraper fixing member (8).

7. The modular powder box of a 3D printer according to claim 6, characterized in that: Rectangular platforms (14) are integrally formed on both sides of the scraper main frame (3), and leveling components are arranged at both ends of the rectangular platform (14). The leveling components include a micrometer (15) and a tension spring (16). The scraper adjustment member (7) is mounted on the scraper main frame (3) by means of a screw (17). The scraper adjustment member (7) is located below the rectangular platform (14), and the two ends of the tension spring (16) are respectively connected to the rectangular platform (14) and the scraper adjustment member (7). The micrometer (15) is mounted on the top of the rectangular platform (14), and an adjustment hole (18) is formed through the rectangular platform (14). The telescopic head of the micrometer (15) passes through the adjustment hole (18) and abuts against the scraper adjustment member (7).

8. The modular powder box of a 3D printer according to claim 7, characterized in that: A tension spring hole (19) is formed through the rectangular platform (14); a tension spring screw (20) is threadedly connected to the side wall of the rectangular platform (14); the tension spring screw (20) passes through the tension spring hole (19); a mounting hole (21) is formed on the top of the scraper adjusting member (7); a cotter pin (22) is formed through the side wall of the scraper adjusting member (7); the cotter pin (22) passes through the mounting hole (21); and two ends of the tension spring (16) are respectively sleeved on the tension spring screw (20) and the cotter pin (22).

9. The modular powder box of a 3D printer according to claim 8, characterized in that: The scraper fixing member (8) comprises two half-shaped fixing members, the two half-shaped fixing members are arranged and connected along the width direction of the scraper main frame (3), and the top of the scraper strip (9) is clamped between the two half-shaped fixing members.

10. The modular powder box of a 3D printer according to claim 9, characterized in that: At least one protrusion (23) is integrally formed on both sides of the scraper strip (9), and a limiting groove (24) is provided on the end surface of the half-molded fixing piece close to the scraper strip (9), and the protrusion (23) is adapted to fit in the limiting groove (24).

Images