Nozzle assembly device, 3D printing apparatus and three-dimensional forming system

Abstract

The present application relates to the technical field of 3D printing, and in particular to a nozzle assembly device, a 3D printing apparatus and a three-dimensional forming system. The nozzle assembly device comprises a driving assembly comprising at least one drive shaft, on which at least two raised structures are arranged at intervals, the drive shaft being configured to drive the raised structures to rotate; and at least two nozzle assemblies, wherein each of the nozzle assemblies is provided with an abutment portion corresponding to a respective one of the raised structures, and the raised structure is configured to rotate and contact the corresponding abutment portion within a preset range, and drive the nozzle assemblies to move in a first direction, such that only one nozzle assembly is moved in the first direction to a target position at any given time.

Description

Nozzle assembly, 3D printing equipment and stereolithography system

[0001] This application claims priority to Chinese patent applications Nos. 202520446709.8 and 202620299341.1 filed with the Chinese Patent Office, the entire contents of which are incorporated herein by reference. [Technical Field]

[0002] This application relates to the field of 3D printing technology, and in particular to a nozzle assembly device, 3D printing equipment and stereolithography system. [Background Technology]

[0003] With advancements in materials science and the diversification of printing technologies, multicolor and multimaterial printing have seen significant development. Existing 3D printers are beginning to support multi-nozzle systems, enabling basic multicolor printing.

[0004] However, existing multi-nozzle 3D printers are prone to multiple nozzles moving up and down simultaneously during printing, which affects printing accuracy.

[0005] [Application Content]

[0006] To address the issue that existing multi-nozzle 3D printers often experience multiple nozzles moving simultaneously during printing, affecting printing accuracy, this application provides a nozzle assembly device, a 3D printing device, and a stereolithography system.

[0007] In a first aspect, this application provides a nozzle assembly device, comprising:

[0008] A drive assembly includes at least one drive shaft, on which at least two protrusions are spaced apart, and the drive shaft is used to drive the protrusions to rotate.

[0009] At least two of the nozzle assemblies, each nozzle assembly having an abutment position corresponding to the protrusion structure;

[0010] The protruding structure is used to rotate and contact the corresponding abutment position within a preset range, and to drive the nozzle assembly to move in a first direction, so that only one nozzle assembly moves to the target position in the first direction at any given time.

[0011] Secondly, this application also provides a 3D printing apparatus, including a nozzle assembly device as described in any of the preceding claims.

[0012] Thirdly, this application also provides a stereolithography system, including a feeding device and the aforementioned 3D printing equipment, wherein the feeding device is used to provide consumables to the 3D printing equipment. [Attached Image Description]

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 is a three-dimensional structural schematic diagram of the nozzle assembly device provided in the first embodiment of this application.

[0015] Figure 2 is an enlarged view of A in Figure 1.

[0016] Figure 3 is a schematic diagram of the elastic structure of the nozzle assembly device provided in the first embodiment of this application.

[0017] Figure 4 is a schematic diagram of the drive shaft and protrusion structure of the nozzle assembly device provided in the first embodiment of this application.

[0018] Figure 5 is a schematic diagram of a portion of the nozzle assembly device provided in the first embodiment of this application.

[0019] Figure 6 is a rear view of a portion of the structure of the nozzle assembly device provided in the first embodiment of this application.

[0020] Figure 7 is a rear view of the driven gear of the nozzle assembly device provided in the first embodiment of this application.

[0021] Figure 8 is an exploded structural diagram of the drive shaft and protrusion structure of the nozzle assembly device provided in the first embodiment of this application.

[0022] Figure 9 is a structural schematic diagram of a single nozzle assembly of the nozzle assembly device provided in the first embodiment of this application.

[0023] Figure 10 is a schematic diagram of the framework of the 3D printing equipment provided in the second embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Nozzle assembly; 2. 3D printing equipment; 10. Drive assembly; 11. Motor; 12. Gear set; 13. Drive shaft; 14. Snap ring; 15. Screw; 30. Nozzle assembly; 31. Extrusion body; 32. Printing body; 33. Abutment position; 34. Elastic structure; 50. Support frame; 51. Through hole; 52. Bearing seat; 70. Protruding structure; 71. Connecting part; 72. Abutment part; 111. Output gear; 121. Driving wheel; 122. Driven gear; 131. Annular groove; 132. Groove; 133. First screw hole; 134. Top surface; 135. Bottom surface; 136. Left side surface; 137. Right side surface; 321. Limiting shaft; 322. Abutment wall; 323. Magnetic component; 70a, raised structure; 70b, raised structure; 70c, raised structure; 70d, raised structure; 711, second screw hole; 1221, through hole; 3411, protrusion; 3412, limiting part.

Detailed Implementation Methods

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0028] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0029] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] Please refer to Figures 1 and 2. A first embodiment of this application provides a nozzle assembly device 1, including:

[0031] The drive assembly 10 includes at least one drive shaft 13, on which at least two protrusions 70 are spaced apart, and the drive shaft 13 is used to drive the protrusions 70 to rotate.

[0032] At least two nozzle assemblies 30, each nozzle assembly 30 having a contact position 33 corresponding to the protrusion 70;

[0033] The protruding structure 70 is used to rotate and contact the corresponding abutment position 33 within a preset range, and drive the nozzle assembly 30 to move in the first direction, so that only one nozzle assembly 30 moves to the target position in the first direction at the same time.

[0034] Specifically, the drive assembly 10 drives the drive shaft 13 to rotate, thereby rotating the protruding structure 70 on the drive shaft 13. The nozzle assembly 30 melts and extrudes the printing material. The number of protruding structures 70 can be the same as the number of nozzle assemblies 30, that is, one protruding structure 70 corresponds to one nozzle assembly 30. The position of the nozzle assembly 30 is set according to the protruding structure 70, and at least part of each protruding structure 70 can protrude outward from the surface of the drive shaft 13 in a direction perpendicular to the axial direction of the drive shaft 13, so that the protruding part of the protruding structure 70 corresponds to the abutment position 33 on the nozzle assembly 30. When the drive assembly 10 drives the drive shaft 13 to rotate, the rotation of the drive shaft 13 drives the protruding structure 70 to rotate, so that the protruding structure 70 contacts the corresponding abutment position 33 within a preset range and continues to rotate while maintaining contact with the abutment position 33. Thus, the rotation of the protruding structure 70 drives the nozzle assembly 30 to move in the first direction, so that the nozzle assembly 30 moves to the target position. The first direction is the direction in which the nozzle assembly 30 moves to the printing position. The target position is the printing position of the nozzle assembly 30.

[0035] It should be noted that the preset range is the pre-set contact range of the protruding structure 70 when it rotates and contacts the abutment position 33. This preset range is not limited; it can be a contact point, a contact segment, or a contact area. This embodiment does not limit this. As long as the contact between the protruding structure 70 and the abutment position 33 within the preset range can drive the nozzle assembly 30 to move to the target position in the first direction.

[0036] Understandably, by setting at least two protruding structures 70 at intervals on at least one drive shaft 13, when the drive shaft 13 drives the protruding structure 70 to rotate and contact the corresponding abutment position 33 within a preset range, one or more protruding structures 70 may contact the abutment position 33, but at the same time only one nozzle assembly 30 moves to the target position in the first direction. This ensures that at least two protruding structures 70 will not simultaneously squeeze and contact the corresponding nozzle assembly 30 and drive the nozzle assembly 30 to move to the target position in the first direction. This ensures that each time the nozzle assembly device 1 performs printing work, only one nozzle assembly 30 driven to the target position by the protruding structure 70 can perform printing work at the same time. This achieves independent control of each nozzle assembly 30 in the nozzle assembly device 1, avoiding the situation where multiple nozzles are moving up and down at the same time when a multi-nozzle 3D printer is printing, and ensuring that the printing accuracy meets the requirements.

[0037] Please refer to Figure 2. In one embodiment, an elastic structure 34 is provided on the contact position 33. When the drive shaft 13 rotates, it drives the protruding structure 70 to rotate until it contacts the elastic structure 34, and drives the nozzle assembly 30 to move in the first direction.

[0038] Understandably, in any embodiment of this invention, an elastic structure 34 can be provided on the abutment position 33 so that the protruding structure 70 rotates to contact the elastic structure 34 when the drive shaft 13 rotates. This avoids rigid contact between the protruding structure 70 and the nozzle assembly 30, thereby preventing the drive shaft 13 from being completely jammed and unable to reverse or having difficulty reversing during rotation.

[0039] Understandably, the drive assembly 10 may have one drive shaft 13 or two or more drive shafts 13. This embodiment does not limit this, as long as all drive shafts 13 in the drive assembly 10 have at least two protrusion structures 70, and the at least two protrusion structures 70 are spaced apart.

[0040] As an alternative embodiment of the first configuration of the drive shaft 13, the drive assembly 10 includes a drive shaft 13, on which a protrusion 70 is angled.

[0041] Understandably, when the two protruding structures 70 are set at an angle, it can be ensured that the two protruding structures 70 will not pass through the same horizontal position at the same time when they rotate. Even if they pass through the same horizontal plane, they will pass through it in sequence. That is, it is ensured that even if there are multiple protruding structures 70 in contact with the abutment position 33 on the corresponding nozzle assembly 30, only one protruding structure 70 can move to the lowest point at the same time and drive the corresponding nozzle assembly 30 to move to the target position in the first direction.

[0042] Optionally, the range of the angle between the two protruding structures 70 can be determined according to the specific situation. This embodiment does not limit this, as long as the angle setting can ensure that only one nozzle assembly 30 moves to the target position in the first direction at the same time.

[0043] Understandably, when a drive shaft 13 is provided in the drive assembly 10, at least two protrusions 70 need to be provided at intervals on the drive shaft 13. The at least two protrusions 70 on each drive shaft 13 can be provided at intervals along the axial direction of the drive shaft 13 to reserve installation space for the nozzle assembly 30. Moreover, the protrusions 70 on the same drive shaft 13 are arranged at an angle, that is, any two protrusions 70 on the same shaft are arranged in different positions, and the protruding parts of the protrusions 70 also point in different directions. Therefore, when one protruding structure 70 contacts the corresponding abutment position 33, since the two protruding structures 70 on the same drive shaft 13 are set at an angle, the other protruding structure 70 will not contact the corresponding abutment position 33 without rotating a certain angle. That is, the two protruding structures 70 on the same drive shaft 13 will not contact the corresponding abutment position 33 at the same time. This ensures that the two protruding structures 70 on the same drive shaft 13 will not drive the nozzle assembly 30 to move to the target position in the first direction at the same time. This ensures that only one nozzle assembly 30 moves to the target position in the first direction at the same time, thereby realizing the independent operation of the two nozzle assemblies 30 corresponding to the same drive shaft 13.

[0044] As a second optional implementation of the drive shaft 13, the drive assembly 10 includes at least two drive shafts 13, each drive shaft 13 having at least one protruding structure 70. When the protruding structures 70 on the same drive shaft 13 are spaced apart and angled, all the protruding structures 70 on the same drive shaft 13 can be located in different positions and different directions. This ensures that the protruding structures 70 on the same drive shaft 13 need to rotate at a certain angle before the nozzle assembly 30 can switch printing, thereby ensuring that after a drive shaft 13 rotates, causing all the protruding structures 70 on that drive shaft 13 to rotate, only one nozzle assembly 30 moves to the target position in the first direction at any given time.

[0045] As a third alternative implementation of setting the drive shaft 13, the drive assembly 10 includes at least two drive shafts 13, each drive shaft 13 is provided with at least one protrusion structure 70, and the protrusion structures 70 on different drive shafts 13 are arranged at intervals, so that the protrusion structures 70 on different drive shafts 13 can achieve different directions and be set at an angle, so that after driving different drive shafts 13 to rotate at the same time, only one nozzle assembly 30 can move to the target position in the first direction at the same time.

[0046] As a fourth optional implementation of setting the drive shaft 13, the drive assembly 10 includes at least two drive shafts 13, each drive shaft 13 is provided with at least one protrusion structure 70, the protrusion structures 70 on the same drive shaft 13 are spaced apart, and the protrusion structures 70 on different drive shafts 13 are spaced apart, so that all the protrusion structures 70 on the two drive shafts 13 are staggered, which is beneficial to setting the position of the nozzle assembly 30 and making it easy to achieve that only one nozzle assembly 30 moves to the target position in the first direction at the same time.

[0047] In one embodiment, the drive assembly 10 includes two drive shafts 13 arranged in parallel, and each drive shaft 13 has two protrusions 70 spaced apart, with the two protrusions 70 on each drive shaft 13 arranged at an angle; the nozzle assembly device 1 includes two sets of nozzle assemblies 30, and each set of nozzle assemblies 30 includes two nozzle assemblies 30; the nozzle assembly 30 includes an extrusion body 31 and a printing body 32, which are connected; an abutment position 33 is provided on the printing body 32 near one end of the extrusion body 31; the two drive shafts 13 are located on opposite sides of the two sets of nozzle assemblies 30.

[0048] Specifically, the two drive shafts 13 can be arranged in parallel to better position the two sets of nozzle assemblies 30. Furthermore, the protruding structures 70 on each drive shaft 13 are angled, meaning the two protruding structures 70 on the same drive shaft 13 are positioned differently, and the protruding parts of the protruding structures 70 point in different directions. This ensures that the two protruding structures 70 on each drive shaft 13 do not simultaneously press against the corresponding nozzle assembly 30, thus guaranteeing that only one protruding structure 70 on the same drive shaft 13 contacts the corresponding nozzle assembly 30 for printing each time the nozzle assembly device 1 is in operation. This achieves independent control of each nozzle assembly 30 in the nozzle assembly device 1, avoiding the situation where multiple nozzles move up and down simultaneously during printing in multi-nozzle 3D printers, and ensuring that the required printing accuracy is met.

[0049] Specifically, two nozzle assemblies 30 in each group of nozzle assemblies 30 can be arranged sequentially along the axial direction of the drive shaft 13, so that the two groups of nozzle assemblies 30 are arranged in an array, which facilitates the integration of two groups of four nozzle assemblies 30, thereby forming a nozzle assembly device 1 capable of multi-color printing. In addition, integrating the four nozzle assemblies 30 together makes the overall nozzle assembly device 1 smaller in size; at the same time, the absence of consumable heating time improves printing efficiency.

[0050] Specifically, the extrusion body 31 supplies printing material, such as plastic filaments or resin, to the printing body 32, which precisely releases and positions the printing material to gradually construct the desired three-dimensional object. The rigid connection between the extrusion body 31 and the printing body 32 provides a fixed relative positional relationship, enabling the connected extrusion body 31 and printing body 32 to work collaboratively under stress, thereby enhancing the stability of the entire nozzle assembly 1.

[0051] Specifically, the abutment position 33 can be set on the printing body 32 at one end near the extrusion body 31, so that the abutment position 33 is close to the middle area of ​​the nozzle assembly 30. After the protrusion structure 70 presses against the abutment position 33, the force on the nozzle assembly 30 is balanced by the setting of this position, making it easier for the printing body 32 to move in the first direction.

[0052] In one embodiment, one end of the elastic structure 34 on the abutment position 33 is connected to the printing body 32, and the other end extends out of the printing body 32. Therefore, the specific part of the contact that the protrusion 70 initially contacts and continuously presses against during rotation is the elastic structure 34 on the abutment position 33. That is, when the drive shaft 13 rotates, it drives a protrusion 70 to rotate until it contacts the elastic structure 34, and the protrusion 70 continuously presses against the elastic structure 34 during rotation, thereby driving the nozzle assembly 30 to move in the first direction through the elastic structure 34.

[0053] Understandably, the elastic structure 34 can be positioned on the printing body 32 near the extrusion body 31, so that the contact position between the protrusion structure 70 and the elastic structure 34 on the nozzle assembly 30 is in the middle region of the nozzle assembly 30. This allows for balanced force application to the nozzle assembly 30 while avoiding interference between the extrusion body 31 and the printing body 32 during operation. Furthermore, the elastic structure 34 prevents contact between the protrusion structure 70 and the nozzle assembly 30 with rigid structural components, thus avoiding complete jamming and inability to reverse or difficulty in reversing during operation.

[0054] Understandably, the opposite sides of the two drive shafts 13 are the opposite inner sides or opposite outer sides of the two drive shafts 13.

[0055] In one optional implementation of the two drive shafts 13, when the two drive shafts 13 are located on the opposite inner sides of the two sets of nozzle assemblies 30, that is, the two sets of nozzle assemblies 30 surround the two drive shafts 13. In this case, when the drive assembly 10 drives the two drive shafts 13 to rotate in the same direction, when a protrusion 70 on one drive shaft 13 rotates to the outer side of the drive shaft 13, it can press against the elastic structure 34 extending towards the drive shaft 13 on the nozzle assembly 30, thereby driving the nozzle assembly 30 to move in the first direction. The other protrusion 70, due to its angle setting, will not contact the corresponding nozzle assembly 30; while the two protrusions 70 on the other drive shaft 13 will experience free rotation. By reasonably setting the angle and position, the arrangement of the two drive shafts 13 and the four nozzle assemblies 30 further ensures that the nozzle assembly device 1 will not exhibit the phenomenon of two or more nozzle assemblies 30 moving simultaneously.

[0056] Referring to Figures 1 and 4, as another optional embodiment of the two drive shafts 13, when the two drive shafts 13 are located on the opposite outer sides of the two sets of nozzle assemblies 30, that is, when the two drive shafts 13 surround the four printing bodies 32, the space occupied by the nozzle assembly device 1 can be reduced. In addition, the operation of the two drive shafts 13 driving the protrusion structure 70 to control the raising and lowering of the corresponding nozzle assembly 30 is simple. By controlling the rotation and reverse rotation of the protrusion structure 70, the raising and lowering of the nozzle assembly 30 currently in contact with one protrusion structure 70 can be realized. After the current nozzle assembly 30 is reset, the printing operation can be quickly switched to another nozzle assembly 30, making the switching between different nozzle assemblies 30 simpler.

[0057] The specific switching process is as follows: When one of the nozzle assemblies 30 needs to perform printing, the drive shaft 13 in the drive assembly 10 can be driven to rotate in the first rotation direction, thereby rotating the protruding structure 70. This causes one of the protruding structures 70 on the same drive shaft 13 to contact the extended portion of the elastic structure 34 on the contact position 33, and maintains this contact state until the protruding structure 70 rotates to its lowest point and stops moving. After this nozzle assembly 30 has finished working, the drive assembly 10 drives the drive shaft 13 to rotate in the opposite direction of the first rotation direction, i.e., the second rotation direction, or continues to rotate in the first rotation direction. This reduces the squeezing force of the protruding structure 70 on the elastic structure 34, causing the elastic structure 34 to return to its original state, thus driving the current nozzle assembly 30 back to its initial position. At this point, the contact with the protruding structure 70 is released. According to the actual printing requirements, the next nozzle assembly 30 to be worked is selected, and the action of the protruding structure 70 squeezing and contacting the elastic structure 34 to drive the nozzle assembly 30 to move in the first direction is repeated to complete the switching of the nozzle assembly 30.

[0058] It should be noted that the lowest point of the movement of the protruding structure 70 is defined as the situation where the protruding structure 70, after contacting the elastic structure 34 from a horizontal position and rotating a certain angle, is in complete contact with the elastic structure 34. This angle can be determined based on the distance the nozzle assembly 30 displaces in the first direction or based on the angle formed between the two protruding structures 70 on the same drive shaft 13. This embodiment does not impose any restrictions on this, as long as the angle ensures that the protruding structure 70 is in complete contact with the elastic structure 34 when it rotates to its lowest point, and drives the nozzle assembly 30 to displace a preset distance in the first direction. Optionally, this angle can be 90°, that is, the lowest point of the movement of the protruding structure 70 can be defined as the situation where the protruding structure 70, after contacting the elastic structure 34 from a horizontal position and rotating 90°, is in complete contact with the elastic structure 34.

[0059] Please refer to Figure 4. In one embodiment, two protrusions 70 on each drive shaft 13 are respectively disposed on two adjacent sides of the drive shaft 13, and the two protrusions 70 of one drive shaft 13 are disposed opposite to the two protrusions 70 of another drive shaft 13.

[0060] Understandably, the two protrusions 70 on each drive shaft 13 are respectively positioned on two adjacent sides of the drive shaft 13. This ensures the angular range of the two protrusions 70 on each drive shaft 13, while avoiding the situation where two protrusions 70 are positioned on opposite sides of a single drive shaft 13, i.e., avoiding the parallel arrangement of two protrusions 70 on the same drive shaft 13. Furthermore, the two protrusions 70 of one drive shaft 13 are positioned opposite to the two protrusions 70 of another drive shaft 13. That is, when the two protrusions 70 of one drive shaft 13 are positioned on two adjacent sides, the two protrusions 70 of the other drive shaft 13 are positioned on the other two adjacent sides of the opposite drive shaft 13, and the four protrusions 70 form a rectangular shape. This achieves the non-planar arrangement of the four protrusions 70 on the two drive shafts 13, where each of the four protrusions 70 is located on one side of the drive shaft 13, rather than on the same side. This arrangement creates two sets of opposing protrusions 70 among the four protrusions 70. In each set, two protrusions 70 are located on different drive shafts 13, and their protruding portions face the same direction. This ensures that the four protrusions 70 rotate from different starting positions each time they rotate, further guaranteeing independent control of each nozzle assembly 30 by the printing device.

[0061] Referring to Figure 4, this embodiment provides an example of two protruding structures 70 on one drive shaft 13 being arranged opposite to two protruding structures 70 on another drive shaft 13. When the two protruding structures 70 on one drive shaft 13 are protrusion structure 70a and protrusion structure 70b, and the two protruding structures 70 on the other drive shaft 13 are protrusion structure 70c and protrusion structure 70d, protrusion structures 70a and 70c form one set of oppositely arranged protruding structures 70, and protruding structures 70b and 70d form another set of oppositely arranged protruding structures 70. The drive shaft 13 includes a top surface 134, a bottom surface 135, a left side surface 136, and a right side surface 137. The top surface 134 and bottom surface 135 are opposite to each other, and the left side surface 136 and right side surface 137 are opposite to each other. When protrusions 70a and 70b are located on the right side 137 and top side 134 of the drive shaft 13, respectively, protrusions 70c and 70d are located on the left side 136 and bottom side 135 of the other drive shaft 13, respectively. That is, protrusions 70a and 70c are both located on the inner side of the two drive shafts 13, relatively parallel, and their protruding parts face the same direction; protrusions 70b and 70d are located on the top side 134 and bottom side 135, respectively, relatively parallel, and their protruding parts face the same direction.

[0062] In one embodiment, the two protrusions 70 on each drive shaft 13 are arranged at 90°.

[0063] Understandably, the angle formed between the two protrusions 70 on each drive shaft 13 can be set to 90°. This limits the rotation angle between one protrusion 70 and its corresponding elastic structure 34 from the start of rotational compression contact to the lowest point to 90°, preventing another protrusion 70 on the same drive shaft 13 from contacting its corresponding nozzle assembly 30. Furthermore, it also prevents over-rotation or under-rotation from affecting the stability of the nozzle assembly 30's displacement in the first direction.

[0064] Referring to Figure 5, in one embodiment, the nozzle assembly device 1 further includes a support frame 50, which has four through holes 51. The support frame 50 is sleeved between the extrusion body 31 and the printing body 32 in each nozzle assembly 30 through the through holes 51.

[0065] Understandably, the support frame 50 can be fitted between the extrusion body 31 and the printing body 32 in each nozzle assembly 30 through the through hole 51. The support frame 50 supports the nozzle assembly 30 and also separates the extrusion body 31 from the printing body 32, ensuring that their structures, except for the connecting structure, do not interfere with each other. Furthermore, the through hole 51 on the support frame 50 also limits the position of the nozzle assembly 30, preventing circumferential wobbling.

[0066] Optionally, in this embodiment, the shape and size of the through hole 51 are not limited, as long as the through hole 51 can allow the connection structure between the extrusion body 31 and the printing body 32 to move through.

[0067] Please refer to Figure 1. In one embodiment, the support frame 50 is provided with two sets of bearing seats 52 at one end near the printing body 32. Each set of bearing seats 52 includes two bearing seats 52, and each drive shaft 13 is rotatably connected to a set of bearing seats 52.

[0068] Understandably, each bearing seat 52 is fixedly connected to the support frame 50. The fixed connection methods include, but are not limited to, screw connection, welding, riveting, bonding, plugging and other connection methods, as long as the bearing seat 52 is fixed to the end of the support frame 50 near the printing body 32.

[0069] Understandably, by providing bearing housings 52 to connect the drive shaft 13 and the support frame 50, and by providing support and positioning for the drive shaft 13, the drive shaft 13 can be relatively fixed in one position and rotate around its central axis. Furthermore, by providing a set of two bearing housings 52 for each drive shaft 13, the rotational stability of the drive shaft 13 can be improved.

[0070] Please refer to Figures 4-7. In one embodiment, the drive assembly 10 further includes a motor 11 and a gear set 12. The motor 11 is connected to the drive shaft 13 via the gear set 12. The motor 11 includes an output gear 111, and the gear set 12 includes at least one gear. In this embodiment, the gear set 12 includes a driving gear 121 and two driven gears 122. The driving gear 121 is meshed with the output gear 111 and the two driven gears 122 respectively. Each drive shaft 13 is correspondingly connected to the gear center of one driven gear 122.

[0071] Understandably, in any embodiment of this invention, the motor 11 can be connected to the drive shaft 13 via the gear set 12 to drive the drive shaft 13 to rotate.

[0072] Specifically, the two driven wheels are located on both sides of the driving wheel 121 and mesh with the driving wheel 121, so that the motor 11 and the gear set 12 form a symmetrical figure with the axis of the driving wheel 121 as the line of symmetry.

[0073] It should be noted that the number of teeth between the driving gear 121 and the driven gear 122 can be the same or different. The ratio of the number of teeth between the driving gear 121 and the driven gear 122 can be set according to the actual use. This embodiment does not impose any restrictions on this.

[0074] Understandably, one end of the drive shaft 13 can be fixedly connected to the gear center of the driven gear 122 after passing through the bearing housing 52, so that when the driven gear 122 rotates, it drives the drive shaft 13 to rotate at the current position, thus avoiding displacement of the drive shaft 13.

[0075] Specifically, the nozzle assembly 1 also includes a retaining ring 14. Each driven gear 122 has a through hole 1221 at its center, and the drive shaft 13 has an annular groove 131. The boundary dimension of the retaining ring 14 is larger than the size of the through hole 1221. One end of the annular groove 131 on the drive shaft 13 passes through the bearing seat 52 and the through hole 1221 in sequence. The retaining ring 14 is fitted onto the annular groove 131, directly clamping the end of the drive shaft 13 between the driven gear 122. This limits the movement of the drive shaft 13, thus completing the fixed connection between the drive shaft 13 and the driven gear 122, making the drive shaft 13 and driven gear 122 more securely fixed, thereby improving the rotational stability of the drive shaft 13. Furthermore, the retaining ring 14 and the groove also facilitate the installation and removal of the drive shaft 13.

[0076] Optionally, the fixed connection between the drive shaft 13 and the gear center of the driven gear 122 can also be a connection method such as screw 15 connection, welding, riveting, bonding, or plugging, as long as it satisfies the requirement of fixing the drive shaft 13 to the gear center of the driven gear 122 and ensuring that the drive shaft 13 will not loosen after multiple rotations.

[0077] Understandably, the motor 11 drives the output gear 111 to rotate, which in turn drives the drive wheel 121 to rotate. The rotation of the drive wheel 121 drives the two driven gears 122 on both sides to rotate in the same direction. The rotation of the two driven gears 122 drives the two drive shafts 13, which are fixedly connected to the gear centers of the two driven gears 122 respectively, to rotate in the same direction. Thus, one drive wheel 121 and two driven gears 122 complete the rotation of the two drive shafts 13 driven by the motor 11 in the same direction. In addition, the transmission through the gear set 12 makes the nozzle assembly device 1 more compact and reduces its overall size.

[0078] Please refer to Figure 8. In one embodiment, the protruding structure 70 includes an abutment portion 72 and a connecting portion 71. The connecting portion 71 is connected to the drive shaft 13, and the abutment portion 72 extends out of the drive shaft 13. When the drive shaft 13 rotates, it causes the abutment portion 72 of the protruding structure 70 to contact the elastic structure 34.

[0079] Understandably, the protruding portion of the raised structure 70 is the abutment portion 72, and the connecting portion 71 is the portion connected to the drive shaft 13. The abutment portion 72 and the connecting portion 71 can be integrally formed to improve the overall strength and rigidity of the raised structure 70, making the rotation of the raised structure 70 and its contact with the elastic structure 34 more stable.

[0080] Optionally, the raised structure 70 and the drive shaft 13 can be fixedly connected by screws 15. Using screws 15 makes installation and disassembly simpler and the fixation more reliable.

[0081] Specifically, a groove 132 can be provided on the drive shaft 13, a first screw hole 133 can be provided in the groove 132, and a second screw hole 711 can be provided on the connecting part 71. At least part of the connecting part 71 is located in the groove 132, and the second screw hole 711 corresponds to the first screw hole 133. The screw 15 can pass through the second screw hole 711 and the first screw hole 133 in sequence, thereby realizing the fixed connection between the protruding structure 70 and the drive shaft 13.

[0082] Optionally, the protruding structure 70 and the drive shaft 13 can also be connected by welding, riveting, bonding, plugging or other connection methods, as long as the protruding structure 70 can be fixed on the drive shaft 13 and can maintain the current fixed connection state after several rotations and compressions to contact the abutment position 33.

[0083] In one embodiment, when the drive shaft 13 rotates in the first rotation direction, the elastic structure 34 remains stationary to contact the abutment portion 72 of the protrusion structure 70; when the drive shaft 13 rotates in the second rotation direction, the elastic structure 34 is driven to rotate by the drive shaft 13 to make way for the rotation of the abutment portion 72.

[0084] Understandably, the second rotation direction is opposite to the first rotation direction. By rotating the elastic structure 34 on the abutment position 33, the elastic structure 34 can have a fixed state and a rotating state respectively when the drive shaft 13 rotates in the first rotation direction and the second rotation direction. This ensures that while the protruding structure 70 rotates with the drive shaft 13 in the first rotation direction, driving the nozzle assembly 30 to move in the first direction, it also ensures that when the protruding structure 70 rotates in the second rotation direction, the elastic structure 34 is driven to rotate by the drive shaft 13 to make way for the rotation of the abutment portion 72 of the protruding structure 70, avoiding the phenomenon that the protruding structure 70 is completely jammed and cannot be reversed or has difficulty reversing when rotating in the second rotation direction.

[0085] Please refer to Figures 3 and 9. In one embodiment, the abutment position 33 is provided with a limiting shaft 321 and an abutment wall 322. The elastic structure 34 includes a protrusion 3411 and a limiting part 3412, with the limiting part 3412 rotatably connected to the limiting shaft 321. When the drive shaft 13 rotates in the first rotation direction, it causes the abutment part 72 of a protrusion structure 70 to contact the side of the protrusion 3411 near the drive shaft 13, so that the limiting part 3412 abuts against the abutment wall 322, and drives the nozzle assembly 30 to move in the first direction. When the drive shaft 13 rotates in the second rotation direction, it causes the abutment part 72 of the protrusion structure 70 to contact the side of the protrusion 3411 away from the drive shaft 13, and drives the limiting part 3412 to disengage from the abutment wall 322 and rotate, thereby driving the rotation of the elastic structure 34 to make way for the protrusion structure 70.

[0086] Specifically, the protrusion 3411 and the limiting portion 3412 of the elastic structure 34 can be an integral structure, which can be integrally molded to improve the overall strength of the elastic structure 34. The middle region of the elastic structure 34 extends outward to form the protrusion 3411, and the two ends of the protrusion 3411 form the limiting portion 3412. The limiting portion 3412 can be wrapped or sleeved on the limiting shaft 321 and extend along the first direction, and can rotate around the limiting shaft 321, thereby driving the elastic structure 34 as a whole to rotate. The abutment wall 322 can be located in the opposite direction to the protrusion 3411, so that when the drive shaft 13 rotates and drives the abutment portion 72 of a protrusion structure 70 to contact the side of the protrusion 3411 near the drive shaft 13 and press down in the first direction, the extended portion of the limiting portion 3412 can abut against the abutment wall 322 to prevent the elastic structure 34 as a whole from rotating, thereby limiting the elastic structure 34 as a whole, thereby driving the nozzle assembly 30 to move in the first direction. When the drive shaft 13 rotates in the reverse direction, the abutment portion 72 of the current protrusion structure 70 can be driven to contact the side of the protrusion portion 3411 opposite to the drive shaft 13. At this time, since the protrusion structure 70 provides a force in the second direction opposite to the first direction to the protrusion portion 3411, the extension portion of the limiting portion 3412 can be disengaged from the abutment of the abutment wall 322 and rotate around the limiting shaft 321, causing the overall elastic structure 34 to rotate, thereby changing the position of the protrusion portion 3411 and the extension portion of the limiting portion 3412. That is, during the reversal process of the protrusion structure 70, the corresponding contacting elastic structure 34 will be driven to rotate, avoiding the back pressure of the elastic structure 34 on the protrusion structure 70 during the reversal process, making the reversal of the protrusion structure 70 easier, and further avoiding the phenomenon that the protrusion structure 70 is completely crushed and cannot be reversed or is difficult to reverse during the reversal process.

[0087] Optionally, the elastic structure 34 can be a torsion spring, with both ends wound around the printing body 32 and the middle area extending beyond the printing body 32 for contact with the protruding structure 70. This torsion spring shape can balance the force applied by the rotation of the protruding structure 70.

[0088] Optionally, the elastic structure 34 can also be other springs, sheet springs, elastic silicone, etc., as long as the elastic element has a protruding part that contacts the protruding structure 70 and can drive the nozzle assembly 30 to move in the first direction and can follow the protruding structure 70 to reverse.

[0089] Please refer to Figure 9. In one embodiment, a magnetic element 323 is provided on the abutment wall 322, and the limiting part 3412 is magnetically attached to the magnetic element 323.

[0090] Understandably, a magnetic element 323 can be provided on the abutment wall 322 so that when the drive shaft 13 rotates, causing the abutment portion 72 of a protruding structure 70 to contact the side of the protrusion 3411 near the drive shaft 13, the limiting portion 3412 abuts against the abutment wall 322, and the magnetic attraction between the two can make the adhesion more secure; and when the drive shaft 13 rotates in the opposite direction, causing the abutment portion 72 of the protruding structure 70 to contact the side of the protrusion 3411 away from the drive shaft 13, and causing the limiting portion 3412 to detach from the abutment wall 322 and rotate, the magnetic attraction of the magnetic element 323 can attract the limiting portion 3412, causing the elastic structure 34 to rotate in the opposite direction, so that the entire elastic structure 34 rotates back to its original position. Thus, the setting of the magnetic element 323 realizes the automatic reset of the elastic structure 34 after rotation, which facilitates subsequent printing operations.

[0091] Please refer to Figure 9. The second embodiment of this application provides a 3D printing device 2, which includes the nozzle assembly device 1 described in any of the first embodiments, and has all the effects of the above-described nozzle assembly device 1, which will not be repeated here.

[0092] A third embodiment of this application also provides a stereolithography system, which includes a feeding device and a 3D printing device according to any of the foregoing embodiments. The feeding device is used to supply consumables to the 3D printing device. The feeding device can hold one or more rolls of consumables. The feeding device may have the function of driving the consumables forward or backward. The feeding device may also include other existing or future designed devices for supplying consumables, which will not be described in detail in this application.

[0093] Compared with existing technologies, the nozzle assembly device, 3D printing equipment, and stereolithography system of this application have the following advantages:

[0094] 1. This application provides a nozzle assembly device, comprising: a drive assembly including at least one drive shaft, on which at least two protrusions are spaced apart, the drive shaft being used to drive the protrusions to rotate; at least two nozzle assemblies, each nozzle assembly having a contact position corresponding to a protrusion; wherein, the protrusions are used to rotate and contact the corresponding contact position within a preset range, and drive the nozzle assemblies to move in a first direction, so that only one nozzle assembly moves to a target position in the first direction at any given time. By using the protrusions spaced apart on the drive shaft, ensuring that only one nozzle assembly moves to the target position in the first direction at any given time, at least two protrusions will not simultaneously begin to press against the corresponding nozzle assembly and drive the nozzle assembly to move to the target position in the first direction. This ensures that each time the nozzle assembly device is working, only one nozzle assembly that contacts the protrusion and is driven to the target position performs printing work at any given time. This achieves independent control of each nozzle assembly in the nozzle assembly device, avoiding the situation where multiple nozzles move up and down simultaneously during printing in multi-head 3D printers, and ensuring that the required printing accuracy is met.

[0095] 2. The contact area provided in this application is provided with an elastic structure; when the drive shaft rotates, it drives the protruding structure to rotate until it contacts the elastic structure, and drives the nozzle assembly to move in the first direction. By providing an elastic structure on the contact area, the phenomenon of the protruding structure and the contact area on the nozzle assembly being completely jammed and unable to reverse or having difficulty in reversing can be avoided.

[0096] 3. The drive assembly provided in this application includes a drive shaft with protrusions on the drive shaft arranged at an angle; or, the drive assembly includes at least two drive shafts, each drive shaft having at least one protrusion, with protrusions on the same drive shaft spaced apart, and / or protrusions on different drive shafts spaced apart. By setting the number of drive shafts and the number and position of protrusions on the drive shafts, multiple options are provided for setting the number and position of nozzle assemblies, making it easier to meet different printing needs.

[0097] 4. The drive assembly provided in this application includes two drive shafts arranged in parallel. Each drive shaft has two protruding structures spaced apart, and the two protruding structures on each drive shaft are angled. The two drive shafts are located on opposite sides of two sets of nozzle assemblies. When the drive assembly drives the two drive shafts to rotate in the same direction, one protruding structure on one drive shaft presses against the elastic structure of the nozzle assembly in the first direction, thereby driving the nozzle assembly to move in the first direction. The other protruding structure, due to its angled arrangement, will not contact the corresponding nozzle assembly. Meanwhile, the two protruding structures on the other drive shaft will idle. Thus, the drive shaft positioning further ensures that the nozzle assembly device will not have more than one nozzle assembly moving up and down simultaneously. In addition, the operation of using the two drive shafts to move the protruding structures to control the lifting and lowering of the corresponding nozzle assembly is simple. By controlling the rotation and reverse rotation of the protruding structures, the lifting and lowering of the nozzle assembly currently in contact with one protruding structure can be achieved. After the current nozzle assembly is reset, the printing operation can be quickly switched to another nozzle assembly, making the switching between different nozzle assemblies simpler. Each nozzle assembly includes an extrusion body and a printing body, which are connected. An abutment is provided on the printing body near the end of the extrusion body, so that the abutment is located in the middle area of ​​the entire nozzle assembly. This can balance the force applied to the nozzle assembly while avoiding interference with the operation of both the extrusion body and the printing body.

[0098] 5. The two protruding structures on each drive shaft provided in this application are respectively arranged on two adjacent sides of the drive shaft, thereby ensuring the angle range of the two protruding structures on each drive shaft; and the two protruding structures of one drive shaft are arranged opposite to the two protruding structures of another drive shaft, realizing the four protruding structures on the two drive shafts are arranged on opposite sides, that is, the four protruding structures are located on one side of the drive shaft, rather than on the same side of the drive shaft, so that the four protruding structures rotate at different starting positions each time they rotate, further ensuring the independent control of each nozzle assembly by the printing device.

[0099] 6. The two protruding structures on each drive shaft provided in this application are set at 90°, thereby limiting the rotation angle between one protruding structure and its corresponding elastic structure from the start of rotational compression contact to the lowest point to 90°, preventing another protruding structure on the same upper shaft from contacting its corresponding nozzle assembly. Additionally, it also avoids over-rotation or under-rotation, which could affect the stability of the nozzle assembly's displacement in the first direction.

[0100] 7. The drive assembly provided in this application also includes a support frame with four through holes. The support frame is fitted between the extrusion body and the printing body in each nozzle assembly through the through holes. By setting up the support frame, the nozzle assembly can be supported, and the extrusion body and the printing body can be separated, ensuring that the structures of the two, except for the connecting structure, do not interfere with each other. In addition, the through holes on the support frame can also limit the position of the nozzle assembly, preventing circumferential shaking of the nozzle assembly.

[0101] 8. The drive assembly provided in this application includes a motor and a gear set; the motor includes an output gear, and the motor is connected to the drive shaft through the gear set; the gear set includes a driving gear and two driven gears, the driving gear meshes with the output gear and the two driven gears respectively, and each drive shaft is connected to the center of a driven gear, thereby enabling the motor to drive two drive shafts located on the same plane to rotate in the same direction, and the transmission through the gear set makes the nozzle assembly device more compact and the overall size of the nozzle assembly device smaller.

[0102] 9. The contact position provided in this application is provided with a limiting shaft and a contact wall. The elastic structure includes a protruding part and a limiting part, with the limiting part rotatably connected to the limiting shaft. When the drive shaft rotates in the first rotation direction, it causes the contact part of a protruding structure to contact the side of the protruding part near the drive shaft, causing the limiting part to abut against the contact wall and driving the nozzle assembly to move in the first direction. When the drive shaft rotates in the second rotation direction, it causes the contact part of the protruding structure to contact the side of the protruding part away from the drive shaft, and causes the limiting part to disengage from the contact wall and rotate. Thus, when the protruding structure rotates normally, the limiting part abuts against the contact wall to limit the elastic structure as a whole; and during the reversal of the protruding structure, it will drive the corresponding contacting elastic structure to rotate, avoiding the back pressure of the elastic structure on the protruding structure during the reversal process, making the reversal of the protruding structure easier, and further avoiding the phenomenon that the protruding structure is completely crushed and cannot be reversed or is difficult to reverse during the reversal process.

[0103] 10. The abutment wall provided in this application is provided with a magnetic component, and the limiting part is magnetically attached to the magnetic component, so that after the elastic structure rotates, the limiting part can be attracted by the magnetic attraction of the magnetic component, so as to realize the automatic reset after the elastic structure rotates.

[0104] 11. This application also provides a 3D printing device that has the same effect as the above-described nozzle assembly device, which will not be described in detail here.

[0105] 12. This application also provides a stereolithography system, which has the same effect as the 3D printing equipment mentioned above, and will not be described in detail here.

[0106] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the principles of this application should be included within the protection scope of this application.

Claims

1. A nozzle assembly device (1), wherein: include: The drive assembly (10) includes at least one drive shaft (13), on which at least two protrusions (70) are spaced apart, and the drive shaft (13) is used to drive the protrusions (70) to rotate. At least two of the nozzle assemblies (30), each nozzle assembly (30) having an abutment position (33) corresponding to the protrusion structure (70); The protruding structure (70) is used to rotate and contact the corresponding abutment position (33) within a preset range, and drive the nozzle assembly (30) to move in the first direction, so that only one nozzle assembly (30) moves to the target position in the first direction at the same time.

2. The nozzle assembly device (1) as claimed in claim 1, wherein: An elastic structure (34) is provided on the contact position (33); when the drive shaft (13) rotates, it drives the protruding structure (70) to rotate to contact the elastic structure (34) and drives the nozzle assembly (30) to move in the first direction.

3. The nozzle assembly device (1) as claimed in claim 1, wherein: The drive assembly (10) includes a drive shaft (13), and the protrusion (70) on the drive shaft (13) is angled; or, The drive assembly includes at least two drive shafts (13), each drive shaft (13) is provided with at least one of the protrusion structures (70), the protrusion structures (70) on the same drive shaft are spaced apart, and / or the protrusion structures (70) on different drive shafts are spaced apart.

4. The nozzle assembly device (1) as claimed in claim 1, wherein: The drive assembly (10) includes two drive shafts (13), which are arranged in parallel. Each drive shaft (13) has two protrusions (70) spaced apart, and the two protrusions (70) on each drive shaft (13) are arranged at an angle. The nozzle assembly device (1) includes two sets of nozzle assemblies (30), and each set of nozzle assemblies (30) includes two nozzle assemblies (30); The nozzle assembly (30) includes an extrusion body (31) and a printing body (32), the extrusion body (31) and the printing body (32) being connected; the abutment position (33) is provided on the printing body (32) near one end of the extrusion body (31); The two drive shafts (13) are located on opposite sides of the two sets of nozzle assemblies (30).

5. The nozzle assembly device (1) as claimed in claim 4, wherein: Two protrusions (70) on each drive shaft (13) are respectively disposed on two adjacent sides of the drive shaft (13), and the two protrusions (70) of one drive shaft (13) are disposed opposite to the two protrusions (70) of the other drive shaft (13).

6. The nozzle assembly device (1) as claimed in claim 4, wherein: The two protrusions (70) on each drive shaft (13) are arranged at 90°.

7. The nozzle assembly device (1) as claimed in claim 4, wherein: The nozzle assembly device (1) further includes a support frame (50), which is provided with four through holes (51). The support frame (50) is sleeved between the extrusion body (31) and the printing body (32) in each nozzle assembly (30) through the through holes (51). The support frame (50) has two sets of bearing seats (52) at one end near the printing body (32). Each set of bearing seats (52) includes two bearing seats (52), and each drive shaft (13) is rotatably connected to one set of bearing seats (52).

8. The nozzle assembly device (1) as claimed in claim 4, wherein: The drive assembly (10) further includes a motor (11) and a gear set (12), wherein the motor (11) is connected to the drive shaft (13) via the gear set (12); The motor (11) includes an output gear (111), and the gear set (12) includes a driving gear (121) and two driven gears (122). The driving gear (121) is meshed with the output gear (111) and the two driven gears (122) respectively. Each drive shaft (13) is connected to the gear center of one of the driven gears (122).

9. The nozzle assembly device (1) as claimed in claim 2, wherein: The protruding structure (70) includes an abutting part (72) and a connecting part (71). The connecting part (71) is connected to the drive shaft (13), and the abutting part (72) extends out of the drive shaft (13). When the drive shaft (13) rotates, it drives the abutting part (72) of one of the protruding structures (70) to contact the elastic structure (34). When the drive shaft (13) rotates in the first rotation direction, the elastic structure (34) remains stationary to contact the abutment portion (72) of the protruding structure (70); when the drive shaft (13) rotates in the second rotation direction, the elastic structure (34) is driven to rotate by the drive shaft (13) to make way for the rotation of the abutment portion (72). The abutment position (33) is provided with a limiting shaft (321) and an abutment wall (322). The elastic structure (34) includes a protrusion (3411) and a limiting part (3412). The limiting part (3412) is rotatably connected to the limiting shaft (321). When the drive shaft (13) rotates along the first rotation direction, it drives the abutment part (72) of one of the protrusion structures (70) to contact the protrusion (3411) on the side close to the drive shaft (13), so that the limiting part (3412) abuts against the abutment wall (322), and drives the nozzle assembly (30) to move in the first direction. When the drive shaft (13) rotates along the second rotation direction, it drives the abutment part (72) of the protrusion structure (70) to contact the protrusion (3411) on the side away from the drive shaft (13), and drives the limiting part (3412) to disengage from the abutment wall and rotate. A magnetic element (323) is provided on the abutting wall (322), and the limiting part (3412) is magnetically attached to the magnetic element (323).

10. A 3D printing device (2), wherein: Includes the nozzle assembly device (1) as described in any one of claims 1 to 9.

11. A three-dimensional forming system, characterized in that, It includes a feeding device and the 3D printing equipment of claim 11, wherein the feeding device is used to supply consumables to the 3D printing equipment.

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