Material rack and 3D printing equipment
By designing a rotatable material rack support frame, the problem of FDM 3D printing equipment material rack occupying a large space is solved, and a compact layout and space saving of the equipment are achieved.
Patent Information
- Application Number
- CN202422294139.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-09-19
Smart Images
Figure CN223370111U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of 3D printing technology, and in particular to a material rack and 3D printing equipment. Background Art
[0002] In the field of 3D printing, Fused Deposition Modeling (FDM) is a widely used additive manufacturing technology. This technology builds printed models layer by layer by heating and extruding thermoplastic materials. FDM 3D printing equipment has gained widespread popularity due to its cost-effectiveness, ease of use, and material versatility, making it suitable for a wide range of applications, from rapid prototyping to low-volume production.
[0003] Currently, FDM 3D printing equipment on the market usually needs to be equipped with an external material rack, and the material is generally placed directly next to the printer or fixed on the external structure of the printer. This method of installing the material rack has the problem of taking up a large space. Utility Model Content
[0004] The main purpose of this application is to propose a material rack and 3D printing equipment, aiming to solve the problem that the material rack installed in the existing 3D printing equipment takes up a large space.
[0005] To achieve the above objectives, the material rack proposed in this application includes:
[0006] base;
[0007] a support frame configured to rotate relative to the base between a first position and a second position;
[0008] Wherein, when in the first position, the support frame is close to the base; when in the second position, the support frame is away from the base and is configured to place consumables.
[0009] In one embodiment, the base is provided with a receiving cavity, and the receiving cavity is provided with an opening; when in the first position, at least a portion of the support frame is placed in the receiving cavity.
[0010] In one embodiment, the support frame has a first surface disposed proximate to the opening and a second surface facing away from the first surface;
[0011] When the support frame is at the first position, a second surface of the support frame opposite to the first surface is located in the receiving cavity or flush with the plane where the opening is located.
[0012] In one embodiment, the support frame includes at least two ribs arranged at intervals; an envelope surface of the rib facing the opening forms the first surface, and the first surface is configured as an arc-shaped surface.
[0013] In one embodiment, a limiting portion is provided on the support frame and / or the receiving cavity; when the support frame is in the second position, the limiting portion is configured to limit the support frame from further rotation.
[0014] In one embodiment, the material rack further includes a first force-applying member, and the first force-applying member is used to drive the support frame to rotate between the first position and the second position.
[0015] In one embodiment, the first force applying member includes a first elastic member, two ends of the first elastic member are respectively connected to the base and the support frame, and the first elastic member is used to move the support frame away from the base.
[0016] In one embodiment, the first force applying member includes a driving device, and the driving device is transmission-connected to the support frame to drive the support frame to rotate.
[0017] In one embodiment, the material rack further comprises a rotating member rotatably disposed on the support frame, wherein the rotating member is configured to rotate relative to the support frame with the longitudinal direction of the support frame as an axis;
[0018] Alternatively, at least a portion of the first surface is rotatable relative to the support frame with the length direction of the support frame as an axis.
[0019] In one embodiment, the rotating member includes a rotating drum and a tensioning member arranged on the rotating drum, the tensioning member includes at least two elastic segments, one end of the elastic segment is connected to the rotating drum, and the other end of the elastic segment is provided with an abutment portion, the abutment portion is spaced apart from the outer surface of the rotating drum, and the abutment portion is used to abut against the material.
[0020] In one embodiment, the rotating member is configured to rotate along a first direction with the length direction of the support frame as the axis under the drive of the discharging device; the material rack also includes a second force-applying member, which is configured to drive the rotating member to rotate along a second direction with the length direction of the support frame as the axis, and the second direction is opposite to the first direction.
[0021] In one embodiment, the second force-applying member includes a second elastic member and a clutch, the clutch includes a first mating member and a second mating member, the first mating member is connected to the support frame, and the clutch is configured to enable the first mating member and the second mating member to rotate relative to each other after the rotating member rotates a preset number of times in the first direction;
[0022] Two ends of the second elastic member are respectively connected to the second matching member and the rotating member. The second elastic member is used to enable the rotating member to rotate relative to the supporting frame along the second direction.
[0023] In one embodiment, the support frame has a first end and a second end opposite to each other in the length direction, the first end is connected to the base via a rotating shaft, and the second end rotates between the first position and the second position.
[0024] In one embodiment, the second end of the support frame is provided with an extension portion, and a wall surface of the storage cavity corresponding to the second end is provided with a slot, and when the support frame is in the first position, the extension portion is configured to be inserted into the slot; and / or,
[0025] The extension portion is configured to be arc-shaped, and a center line of the arc of the extension portion is perpendicular to a rotation axis of the support frame.
[0026] In one embodiment, the material rack further includes a limiting member connected to the end of the rotating shaft, and the limiting member is used to limit the axial movement of the rotating shaft.
[0027] In one embodiment, the material rack further includes a fixing structure connected to the base, and the fixing structure is configured to fix the support frame at the first position.
[0028] In one embodiment, the fixing structure includes a first fastener and a second fastener, the first fastener is connected to the base, the second fastener is connected to the support frame, and the first fastener and the second fastener are buckled; or,
[0029] The fixing structure includes a first magnetic component and a second magnetic component, the first magnetic component is connected to the base, the second magnetic component is connected to the support frame, and the first magnetic component and the second magnetic component attract each other.
[0030] In one embodiment, the material rack further includes an input device, and at least one of the first magnetic component and the second magnetic component is configured as an electromagnet; the input device is electrically connected to the first magnetic component and / or the second magnetic component configured as an electromagnet; the input device is used to obtain an input trigger signal to de-adsorb the first magnetic component and the second magnetic component.
[0031] In one embodiment, the material rack further comprises a connecting piece, the connecting piece is detachably connected to the base, and the connecting piece is used to be detachably connected to the operating equipment; and / or,
[0032] The material rack further includes a reader, which is mounted on the base or the support frame; the reader is used to obtain material information stored in the information storage device; and the reader is used to be electrically connected to the controller of the operating equipment.
[0033] The present application also proposes a 3D printing device, comprising the material rack as described above.
[0034] The technical solution of the present application is to configure the support frame to be rotatable relative to the first position and the second position of the base. When the support frame is in the first position, the support frame can be folded up, thereby reducing the space occupied by the material rack; when the support frame is in the second position, the material can be installed on the support frame, and the support frame can be used to provide support for the material; the material rack has the advantage of a compact structure, which can reduce the space occupied by the material rack when it is folded up. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0036] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a material rack provided in the present application in an open state;
[0037] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;
[0038] Figure 3 This is a front structural schematic diagram of an embodiment of a material rack provided in this application;
[0039] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at the middle BB;
[0040] Figure 5 This is another schematic diagram of the three-dimensional structure of an embodiment of a material rack provided by this application;
[0041] Figure 6 This is a schematic diagram of the three-dimensional structure of an embodiment of a material rack provided in the present application in a closed state;
[0042] Figure 7 This is a schematic diagram of the three-dimensional structure of another embodiment of the material rack provided in the present application in the open state;
[0043] Figure 8 This is a schematic diagram of the three-dimensional structure of another embodiment of the material rack provided by the present application in the use state;
[0044] Figure 9 A schematic diagram of the three-dimensional structure of another embodiment of the material rack provided by the present application in an open state from another perspective;
[0045] Figure 10 This is a schematic cross-sectional structural diagram of another embodiment of the material rack provided in the present application in the open state.
[0046] Description of Figure Numbers:
[0047] 1. Base; 11. Storage cavity; 111. Rotation space; 112. Slot; 12. Mounting plate; 2. Support frame; 21. Limiting section; 22. Rib plate; 23. Extension portion; 24. Rotating member; 241. Rotating drum; 242. Elastic section; 2421. Abutment portion; 25. First end; 26. Second end; 27. First surface; 28. Second surface; 3. First force-applying member; 4. Limiting member; 5. Fixing structure; 51. First fastener; 52. Second fastener; 6. Connecting member; 7. Reader; 8. Rotating shaft; 9. Material; 10. Information storage device; 101. Bearing.
[0048] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0049] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.
[0050] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0051] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0052] In the field of 3D printing, Fused Deposition Modeling (FDM) is a widely used additive manufacturing technology. This technology builds printed models layer by layer by heating and extruding thermoplastic materials. FDM3D printing equipment is widely popular due to its high cost-effectiveness, simple operation and material diversity, and is suitable for a variety of application scenarios from rapid prototyping to small-batch production. Currently, FDM3D printing equipment on the market usually requires an external material rack, and the material is generally placed directly next to the printer or fixed to the external structure of the printer. This method of installing the material rack has the problem of taking up a lot of space.
[0053] The present application proposes a material rack.
[0054] See also Figures 1 to 10 In one embodiment of the present application, the material rack includes a base 1 and a support frame 2, and the support frame 2 is configured to rotate between a first position and a second position relative to the base 1; wherein, in the first position, the support frame 2 is close to the base 1; and in the second position, the support frame 2 is away from the base 1, and is configured to place consumables. By configuring the support frame 2 to rotate relative to the first position and the second position of the base 1, the support frame 2 can be folded up when in the first position, thereby reducing the space occupied by the material rack; when the support frame 2 is in the second position, the material 9 can be installed on the support frame 2, and the support frame 2 can be used to provide support for the material 9; the material rack has the advantage of a compact structure, which can reduce the space occupied by the material rack when it is folded up. The first position can be understood as the position where the support frame 2 is closed relative to the base 1; wherein, Figure 6 The second position can be understood as the position where the support frame 2 is opened relative to the base 1; Figure 4 The support frame 2 is shown in the second position.
[0055] In one embodiment, the base 1 is provided with a storage cavity 11, and the storage cavity 11 is provided with an opening; when in the first position, at least part of the support frame 2 is placed in the storage cavity 11. In the above structure, it is necessary to provide a storage cavity 11 on the base 1, and by applying an external force to the support frame 2, the support frame 2 is rotated relative to the base 1 to be at least partially placed in the storage cavity 11, and the storage cavity 11 is used to hide the support frame 2; when the support frame 2 needs to be used, the support frame 2 can be rotated and opened by an external force; when the support frame 2 is not needed, the support frame 2 can be rotated to be partially or completely placed in the storage cavity 11, thereby reducing the external space occupied by the support frame 2. The support frame 2 can be rotated by manually applying force to the support frame 2, or by a mechanical part driving the support frame 2 to rotate, or by a motor driving the support frame 2 to rotate. Among them, the mechanical part is the first elastic part mentioned below.
[0056] In one embodiment, the support frame 2 has a first surface 27 disposed proximate to the opening and a second surface 28 facing away from the first surface 27. When the support frame 2 is in the first position, the second surface 28 of the support frame 2, which is opposite to the first surface 27, is located within the storage cavity 11 or flush with the plane of the opening. The first surface 27 and the second surface 28 of the support frame 2 are disposed opposite each other. When the support frame 2 is in the first position, the support frame 2 can be completely placed within the storage cavity 11, with the first surface 27 of the support frame 2 facing the inner wall of the storage cavity 11 and the second surface 28 of the support frame 2 located within the storage cavity 11 or flush with the plane of the opening, to ensure that the support frame 2 does not protrude outside the storage cavity 11 when stored. This allows the support frame 2 to form a smooth connection with the plane of the opening of the base 1 in the closed state, making the structure of the rack more compact and flat when the support frame 2 is in the closed state. When the material rack is connected to the operating equipment, an installation cavity should be provided on the shell of the operating equipment, and the base 1 is used to be placed in the installation cavity, and the base 1 forms a detachable connection with the shell, for example, the base 1 is connected to the shell by bolts, screws or rivets; at this time, the side surface of the base 1 facing the outside is located in the installation cavity or flush with the opening of the installation cavity. Therefore, when the support frame 2 is placed in the storage cavity 11, the side surface of the support frame 2 facing the outside is located in the storage cavity 11 or flush with the plane of the opening, so as to ensure that when the support frame 2 is stored, the material rack as a whole will not protrude from the outside of the installation cavity, and the material rack can be hidden in the installation cavity of the shell, forming a compact layout between the operating equipment and the material rack, reducing the exposure of the material rack, and thereby reducing the external space occupied by the material rack.
[0057] In one embodiment, when the support frame 2 is in the second position, the length direction of the support frame 2 forms a first angle α with the length direction of the storage chamber 11. The first angle α is greater than or equal to 45° and less than or equal to 120°, thereby enabling the support frame 2 to be used for mounting a rolled material 9 and providing better support for the material 9. By controlling the angle of the first angle α within the range of greater than or equal to 45° and less than or equal to 120°, the support frame 2 can ensure that it provides sufficient support when opened and prevent the material 9 from detaching from the support frame 2 due to excessive tilting. When the first angle α is 45°, the support frame 2 can provide better supporting force for the material 9; when the first angle α is 120°, the support frame 2 can provide a larger installation space for the material 9; wherein, the material 9 is generally set as a roll structure, and the base 1 is generally installed on the outer shell surface of the operating equipment; when the first angle α is 90°, the length direction of the support frame 2 is perpendicular to the length direction of the storage cavity 11, and the support frame 2 is in a horizontal state. At this time, the support frame 2 can not only provide appropriate supporting force for the material 9, but also leave appropriate installation space for the material 9, and facilitate the material 9 to rotate around the support frame 2 for discharge.
[0058] In one embodiment, the support frame 2 includes at least two spaced-apart ribs 22. At least two ribs 22 are spaced a certain distance apart on the support frame 2, which can ensure that the support frame 2 has sufficient structural strength to support the material 9, while reducing the amount of material 9 used in the support frame 2 and reducing the overall weight of the support frame 2. The ribs 22 can be extended along the length or width of the ribs 22, or can be extended along both the length and width of the ribs 22. Since the weight of the support frame 2 is reduced, the force required for the support frame 2 to rotate is also reduced, thereby improving the rotation flexibility of the support frame 2. In addition, to ensure that the support frame 2 has sufficient structural strength, the support frame 2 can be made of metal material or plastic material, for example, metal materials such as steel, aluminum alloy, stainless steel, or plastic materials with high hardness and wear resistance such as polyformaldehyde, polycarbonate, and nylon.
[0059] In one embodiment, when in the second position, the envelope surface of the rib 22 facing the opening forms a first surface 27, and the first surface 27 is configured as an arcuate surface. The material 9 is generally configured as a roll, and a roll is provided at the center of the material 9, wherein the roll is a cylindrical component for winding the material 9. When the support frame 2 is in the second position, the support frame 2 is used to pass through the roll to provide support for the material 9. The first surface 27 formed by the envelope surface facing the opening is configured as an arcuate surface, which helps the support frame 2 to fit more closely with the inner wall of the roll, thereby improving the support stability of the support frame 2 for the material 9. During the unwinding process (i.e., releasing the material 9 from the roll), the roll needs to rotate around the support frame 2. The first surface 27 is configured as an arcuate surface, which can reduce friction and wear between the roll and the support frame 2, thereby extending the service life of the support frame 2 and the roll, and reducing energy consumption during unwinding. Moreover, due to the low friction between the roll and the support frame 2, the force required for the support frame 2 to rotate is also reduced, thereby improving the rotational flexibility and efficiency of the roll.
[0060] In one embodiment, a limiting portion is provided on the support frame 2 and / or the receiving chamber 11; when the support frame 2 is in the second position, the limiting portion is configured to restrict further rotation of the support frame 2. The limiting portion is used to provide an angular limit for the support frame 2 during the opening process of the support frame 2, thereby ensuring that the support frame 2 rotates within a preset angular range, so that the support frame 2 can provide stable support for the material 9.
[0061] In one embodiment, the limiting portion includes a limiting section 21. The support frame 2 has a first end 25 and a second end 26 that are opposite in the longitudinal direction. The limiting section 21 is located at the first end 25 of the support frame 2. A limiting abutment surface is provided in the storage chamber 11. When the support frame 2 is in the second position, the limiting section 21 abuts against the limiting abutment surface to restrict further opening of the support frame 2. As the second end 26 of the support frame 2 moves away from the base 1, i.e., as the support frame 2 opens, the limiting section 21 swings into the storage chamber 11 until it abuts against the limiting abutment surface. The limiting abutment surface is used to provide an angular limit for the support frame 2 during its opening process, ensuring that the support frame 2 rotates within a preset angular range.
[0062] In one embodiment, a recess is provided on the wall of the storage chamber 11 facing the support frame 2, and a position-limiting abutting surface is provided on the wall of the recess; one end of the support frame 2 is configured to rotate into the recess and abut against the position-limiting abutting surface. By providing a recess on the wall of the storage chamber 11 facing the support frame 2, the recess can be utilized to provide sufficient space for the rotation of the support frame 2; the size of the recess needs to be adjusted based on the length and width of the position-limiting section 21 and the rotation angle of the support frame 2 to ensure that the position-limiting section 21 can smoothly rotate and enter the recess, thereby ensuring that the support frame 2 can be smoothly opened and stored.
[0063] In one embodiment, a rotation space 111 is provided at one end of the storage chamber 11 near the limiting section 21; when the support frame 2 rotates, the limiting section 21 can swing in the rotation space 111; the limiting abutment surface forms a second angle β with the length direction of the storage chamber 11. The rotation space 111 is formed in a recess on the wall of the storage chamber 11 facing the support frame 2, and the rotation space 111 serves as a swinging area for the limiting section 21; when the support frame 2 rotates, the limiting section 21 can swing in the rotation space 111 until it abuts against the limiting abutment surface, at which time the limiting abutment surface forms a second angle β with the length direction of the storage chamber 11, wherein the first angle α is equal to the second angle β. In other words, the second angle β formed by the limiting abutment surface and the length direction of the storage chamber 11 is equal to the first angle α formed by the supporting frame 2 and the length direction of the storage chamber 11 after it is opened.
[0064] In one embodiment, the material rack further includes a first force member 3, which is used to drive the support frame 2 to rotate between a first position and a second position. The first force member 3 is used to drive the support frame 2 to rotate closer to or away from the base 1 to achieve the purpose of storage or opening. By adding the first force member 3 to replace the user's manual rotation of the support frame 2, the operation convenience and efficiency are improved, and the user's labor intensity can be reduced. The first force member 3 can be a motor, which drives the support frame 2 to rotate through the rotation of the motor, thereby achieving automatic storage or opening of the support frame 2. The first force member 3 can be a cylinder, which drives the support frame 2 to rotate through changes in gas pressure, for example, the telescopic rod of the cylinder drives the second end 26 of the support frame 2 to swing. The first force member 3 can be a hydraulic cylinder, which drives the support frame 2 to rotate through changes in the pressure of the hydraulic oil, for example, the telescopic rod of the hydraulic cylinder drives the second end 26 of the support frame 2 to swing.
[0065] In one embodiment, the first force-applying member 3 includes a first elastic member, the two ends of which are respectively connected to the base 1 and the support frame 2. The first elastic member is used to force the second end 26 of the support frame 2 away from the base 1. Specifically, the first elastic member can be a spring, or the first elastic member can be made of rubber or other elastic materials; the elastic potential energy generated by the elastic deformation of the first elastic member drives the support frame 2 to rotate relative to the base 1.
[0066] In another embodiment, the first force-applying member 3 includes a driving device that is in transmission connection with the support frame 2 to drive the support frame 2 to rotate. The driving device can be a drive motor that can precisely control the rotation speed and direction of the support frame 2. By driving the support frame 2 to rotate with the drive motor, the support frame 2 can be automatically opened and retracted, replacing the manual opening and retraction operation of the support frame 2 by the user.
[0067] In one embodiment, the first elastic member includes a torsion spring, the coil portion of the torsion spring is sleeved on the rotating shaft 8, and the two ends of the torsion spring are connected to the support frame 2 and the base 1. The two ends of the torsion spring are connected to the support frame 2 and the base 1, and the torsion force of the torsion spring can drive the support frame 2 to rotate, so that the support frame 2 can be opened; by adding a torsion spring to replace the user's manual rotation of the support frame 2, the convenience and efficiency of the operation are improved. In addition, by adjusting the tension or size of the torsion spring, the torsion spring torsion can be changed, thereby adjusting the pop-up force and speed of the support frame 2. The torsion spring itself can store energy and does not need to rely on external energy for driving, which has the advantage of energy saving; and because the torsion spring will release its stored energy at one time when released, it also has the advantage of fast opening speed; therefore, using a torsion spring to drive the support frame 2 to open has the advantages of simple structure, low maintenance requirements, high reliability, and energy saving.
[0068] In one embodiment, the material rack further includes a rotating member 24 rotatably disposed on the support frame 2, and the rotating member 24 is configured to rotate relative to the support frame 2 with the longitudinal direction of the support frame 2 as an axis. The support frame 2 is configured as a rotating shaft 8 structure, and the rotating member 24 rotates around the support frame 2. The rotating member 24 is used to provide support for the material 9 through the reel, which can improve the support stability of the support frame 2 for the material 9; during the material 9 unloading process (i.e., releasing from the reel), the reel needs to rotate around the support frame 2, and the rotating member 24 rotates together with the reel; by setting the outer envelope of the rotating member 24 to an arc, it helps to fit the support frame 2 more closely with the inner wall of the reel, and the connection stability between the reel and the rotating member 24 can be improved. The support frame 2 and the rotating member 24 are rotatably connected by providing a bearing, and the use of the bearing can improve the rotation efficiency of the rotating member 24.
[0069] In another embodiment, at least the first surface 27 can rotate relative to the support frame 2 with the longitudinal direction of the support frame 2 as the axis. During the unwinding process of the material 9 (ie, released from the roll), the first surface rotates together with the roll.
[0070] In one embodiment, the diameter of the end of the rotating member 24 away from the base 1 is smaller than the diameter of the end of the rotating member 24 closer to the base 1. By making the diameter of one end of the rotating member 24 larger than the diameter of the other end, when the reel is loaded into the rotating member 24, it is inserted from the end with the smaller diameter, which facilitates the installation of the material 9. In addition, the end of the rotating member 24 away from the base 1 is provided with an inclined surface, which provides a guide for the installation of the reel. The end of the rotating member 24 with a larger diameter abuts against the inner wall of the reel, which can improve the installation stability of the reel.
[0071] In one embodiment, the rotating member 24 includes a rotating drum 241 and a tensioning member disposed on the rotating drum 241. The tensioning member includes at least two elastic segments 242. One end of the elastic segment 242 is connected to the rotating drum 241. The other end of the elastic segment 242 is provided with an abutment portion 2421. The abutment portion 2421 is spaced apart from the outer surface of the rotating drum 241. The abutment portion 2421 is configured to abut against the material 9. The abutment portion 2421 of the elastic segment 242 is configured to abut against the inner wall of the reel, thereby improving the connection stability between the reel and the rotating member 24. The abutment portion 2421 is parallel to the inner wall of the reel, increasing the contact area between the abutment portion 2421 and the reel, providing better support for the reel; when storage is required, the abutment portion 2421 can be brought close to the outer wall of the rotating drum 241, the elastic section 242 is deformed and can be stored in the storage cavity 11, and the overall circumferential space occupied by the rotating member 24 is reduced. At this time, the support frame 2 can be rotated to store the support frame 2 and the rotating member 24 in the storage cavity 11. When two elastic sections 242 are provided, the two elastic sections 242 are located on opposite sides of the inner wall of the reel; multiple elastic sections 242 can also be provided, for example, six elastic sections 242 are arranged equidistantly around the rotating drum 241, so that the force applied to the rotating member 24 is more uniform.
[0072] In one embodiment, the rotating member 24 is configured to rotate in a first direction about the length of the support frame 2 under the drive of the discharge device. The material frame also includes a second force-applying member configured to drive the rotating member 24 to rotate in a second direction about the length of the support frame 2, the second direction being opposite to the first direction. When material 9 needs to be released from the reel, the external discharge device begins to operate, driving the material 9 to unwind, causing the reel to rotate and driving the rotating member 24 to rotate in the first direction about the length of the support frame 2. When unwinding stops, that is, when the discharge device is no longer in operation, the second force-applying member drives the rotating member 24 to rotate in a second direction about the length of the support frame 2, the second direction being opposite to the first direction, thereby tightening the material 9 on the reel and preventing the material 9 from being entangled or insufficiently tensioned due to excessive unwinding. By utilizing the second force-applying member, the material 9 can be unwound smoothly when needed and quickly tightened when unwinding is not needed, maintaining the material's neatness and stable tension, ensuring the continuity of the production process and the quality of the material.
[0073] In one embodiment, the second force-applying member includes a second elastic member and a clutch. The clutch includes a first mating member and a second mating member. The first mating member is connected to the support frame 2. The clutch is configured to enable relative rotation of the first and second mating members after the rotating member 24 rotates a predetermined number of times in the first direction. The second elastic member is connected to the second mating member and the rotating member 24 at both ends, respectively. The second elastic member is configured to rotate the rotating member 24 in a second direction relative to the support frame 2. When the material 9 needs to be released from the reel, the discharge device rotates the rotating member 24, causing the second elastic member to deform and store energy. After the rotating member 24 rotates a predetermined number of times in the first direction, the first and second mating members of the clutch are enabled to rotate relative to each other. The stored elastic potential energy of the second elastic member is released, driving the rotating member 24 to rotate in the second direction relative to the support frame 2, thereby tightening the material 9 on the reel. The combination of the second elastic member, the clutch, and the external discharge device enables automated unwinding and winding operations, improving production efficiency and reliability. It should be noted that when the second elastic member needs to store energy, the first fitting member and the second fitting member of the clutch are relatively fixed. Specifically, the first fitting member and the second fitting member can be fixed by friction or locked by a clutch structure.
[0074] Among them, the clutch can be set to have an adjustable gear position, so that after the gear position is adjusted, the first mating part and the second mating part are changed to a preset number of turns when they can rotate relative to each other, that is, the elastic energy storage of the second elastic part can be changed by adjusting the orientation, thereby changing the preset number of turns when the first mating part and the second mating part can rotate relative to each other; the second elastic part can be a spring, which is a spiral elastic element that can store energy by deforming and winding, and can also be called a torsion spring. It should be noted that the two ends of the first elastic part can be connected to the second mating part and the rotating part 24 respectively by a fixed connection or a detachable connection, the rotating part 24 can be connected to the second mating part by a fixed connection or a detachable connection, and the support frame 2 can be connected to the first mating part by a fixed connection or a detachable connection. Among them, the above-mentioned connection method adopts a fixed connection, which can improve the connection stability.
[0075] For example, when the material 9 is being unwound, the first and second mating members abut against each other to generate friction. At this point, the rotating member 24 rotates relative to the support frame 2 in the first direction, causing the second elastic member to deform and store energy. When the second elastic member has completed storing energy, the driving device continues to unload the material and drives the rotating member 24 to rotate. After overcoming the friction between the first and second mating members, the second elastic member rotates with the rotating member 24, achieving the purpose of continuous unloading. After the rotating member 24 rotates a preset number of times in the first direction, the driving device stops operating, and the second elastic member releases the stored elastic potential energy, driving the rotating member 24 to rotate in the second direction relative to the support frame 2, tightening the material 9 on the roll.
[0076] In another embodiment, the material rack further includes a rotation drive device, which is driven by a drive signal to rotate the rotating member 24 in a second direction after the rotating member 24 rotates a preset number of times in the first direction, so that the material 9 on the roll is tightened; wherein the rotation drive device can adopt a drive motor, and the drive signal can be issued by the control system of the equipment to instruct the rotation drive device to start working.
[0077] In one embodiment, the rotating member 24 further includes a bearing 101. The inner ring of the bearing 101 is connected to the support frame 2, and the outer ring of the bearing 101 is connected to the rotating member 24. During the unloading process, the drum 241 rotates around the support frame 2 via the bearing 101. The bearing 101 supports the load through rolling elements (such as balls or rollers), thereby reducing rotational friction between the support frame 2 and the rotating member 24 and improving the rotational efficiency of the rotating member 24.
[0078] In one embodiment, the support frame 2 has a first end 25 and a second end 26 that are opposed to each other along its length. The first end 25 is connected to the base 1 via a rotating shaft 8, and the second end 26 rotates between a first position and a second position. The rotating shaft 8 is a rotating component connecting the support frame 2 and the base 1, allowing the support frame 2 to rotate relative to the base 1, thereby enabling the support frame 2 to rotate within a certain range.
[0079] In one embodiment, the first end 25 is arc-shaped, and at least one end wall surface of the storage cavity 11 in the longitudinal direction is configured to be arc-shaped and is arranged opposite to the end arc surface of the support frame 2. When the support frame 2 is placed in the storage cavity 11, that is, when it is in the first position, the side wall surface of the storage cavity 11 in the longitudinal direction can be abutted against the side wall surface of the support frame 2 in the longitudinal direction. At this time, the inner wall of the storage cavity 11 and the outer surface of the support frame 2 fit more tightly, and the base 1 provides sufficient wrapping and protection for the support frame 2; and when the support frame 2 rotates and enters the storage cavity 11 under the action of the first force-applying member 3, the support frame 2 generates a force on the inner wall of the storage cavity 11. The side wall surface of the storage cavity 11 in the longitudinal direction is configured to be arc-shaped, which can disperse the force borne by the inner wall of the storage cavity 11, thereby reducing the stress concentration on the inner wall of the storage cavity 11, avoiding cracking and damage to the base 1, and thus improving the service life of the entire base 1. Similarly, when the support frame 2 rotates and enters the storage cavity 11, the storage cavity 11 has a reaction force on the support frame 2; when the support frame 2 rotates and enters the storage cavity 11, the side wall surface of the support frame 2 in the longitudinal direction is set to be arc-shaped, which can disperse the overall force of the support frame 2 and avoid damage to the support frame 2 due to stress concentration.
[0080] In one embodiment, the first end 25 and / or the second end 26 of the support frame 2 are configured as arcuate surfaces, and the wall surfaces corresponding to the first end 25 and the second end 26 of the support frame 2 are configured as arcuate surfaces and are arranged opposite to the arcuate surfaces of the first end 25 and / or the second end 26 of the support frame 2. When the support frame 2 is placed in the storage cavity 11, the first end 25 and / or the second end 26 of the support frame 2 abut against the wall surface of one end in the longitudinal direction of the storage cavity 11, thereby reducing the gap formed between the support frame 2 and the inner wall surface of the storage cavity 11, preventing foreign particles or dust from entering the gap and causing the support frame 2 to become stuck and unable to open, thereby improving the reliability of the rack.
[0081] In one embodiment, the second end 26 of the support frame 2 is provided with an extension portion 23, which extends toward the receiving chamber 11. When the support frame 2 is in the closed state, that is, in the first position, the extension portion 23 extends toward the receiving chamber 11. The extension portion 23 is used to limit the axial movement of the material 9 along the support frame 2, thereby ensuring that the material 9 remains stable on the support frame 2 and preventing the material 9 from falling from the support frame 2 during the unloading process. Specifically, the extension portion 23 extends in a direction perpendicular to the length of the support frame 2; when the support frame 2 is in the open state, the extension portion 23 extends in a direction parallel to the length of the receiving chamber 11.
[0082] In one embodiment, a slot 112 is provided on the wall surface of the storage chamber 11 corresponding to the second end 26. When the support frame 2 is in the first position, the extension portion 23 is configured to be inserted into the slot 112. The cooperation between the slot 112 and the extension portion 23 can establish a mechanical connection between the second end 26 of the support frame 2 and the storage chamber 11, thereby increasing the overall structural stability of the support frame 2 when placed in the storage chamber 11. That is, the cooperation between the slot 112 and the extension portion 23 can prevent the support frame 2 from opening when closed, ensuring that it is always in the storage chamber 11. In one embodiment, the extension portion 23 is configured to be arc-shaped, and the center line of the arc of the extension portion 23 is perpendicular to the rotation axis of the support frame 2. When the support frame 2 is rotated and placed in the storage chamber 11, the extension portion 23 is configured to be arc-shaped, which can improve the situation where the extension portion 23 interferes with the side wall of the storage chamber 11, thereby preventing the extension portion 23 from hindering the rotation of the support frame 2. The extension portion 23 is configured to be arc-shaped, so that the extension portion 23 is more flexible when inserted into the slot 112 , thereby reducing the resistance of the support frame 2 during rotation.
[0083] In one embodiment, the material rack further includes a stopper 4 connected to the end of the rotating shaft 8 and configured to limit the axial movement of the rotating shaft 8. The stopper 4 is connected to the end of the rotating shaft 8, effectively limiting the axial movement of the rotating shaft 8 and preventing the rotating shaft 8 from falling off the support frame 2 or the base 1. By limiting the axial movement of the rotating shaft 8, the connection between the support frame 2 and the base 1 is ensured to be more stable, structural loosening caused by the movement of the rotating shaft 8 is reduced, and the rotational reliability and smoothness of the support frame 2 are improved.
[0084] In one embodiment, the stopper 4 includes a latch, and one end of the shaft 8 is provided with a socket into which the latch is inserted. The latch, inserted into the socket, provides a stable stop for the shaft 8, preventing it from accidentally moving or falling off. This provides a simple structure and ease of assembly and disassembly. If the user discovers wear or damage to the shaft 8 or latch, they can be quickly replaced.
[0085] In one embodiment, the rack further includes a fixing structure 5 connected to the base 1 and configured to secure the support frame 2 as it rotates closer to the base 1. The fixing structure 5 secures the support frame 2 as it rotates closer to the base 1, ensuring that the support frame 2 remains closed and preventing it from opening due to gravity or external forces. The fixing structure 5 secures the support frame 2, preventing it from opening due to vibration or collision during transport or storage, thereby reducing the risk of damage to the support frame 2 caused by collisions after opening.
[0086] In one embodiment, the fixing structure 5 includes a first fastener 51 and a second fastener 52. The first fastener 51 is connected to the base 1, and the second fastener 52 is connected to the support frame 2. The first fastener 51 and the second fastener 52 are fastened together. After the first fastener 51 and the second fastener 52 are fastened together, they can provide a stable fixing effect for the support frame 2 and the base 1 to prevent the support frame 2 from automatically opening when in a closed state; they can prevent possible injuries to the user caused by the support frame 2 accidentally opening; the user can fix or release the support frame 2 through simple operations, such as fastening the first fastener 51 and the second fastener 52 or unfastening the first fastener 51 and the second fastener 52, thereby simplifying the user's operation process. In addition, the support frame 2 can be provided with a button, which is connected to the second fastener 52. By pressing the button, the first fastener 51 and the second fastener 52 can be unfastened.
[0087] In one embodiment, the fixing structure 5 includes a first magnetic component and a second magnetic component. The first magnetic component is connected to the base 1, and the second magnetic component is connected to the support frame 2. The first and second magnetic components attract each other. The magnetic attraction between the first and second magnetic components secures the second end of the support frame 2 to the base 1, preventing the support frame 2 from automatically opening when closed. The magnetic attraction between the first and second magnetic components secures the second end of the support frame 2 to the base 1, reducing mechanical wear on the fixing structure 5.
[0088] In one embodiment, the material rack further includes an input device, and at least one of the first magnetic component and the second magnetic component is configured as an electromagnet; the input device is electrically connected to the first magnetic component and / or the second magnetic component configured as an electromagnet; the input device is used to obtain an input trigger signal to release the adsorption between the first magnetic component and the second magnetic component. Among them, the input device may include a face module, a fingerprint module, a palm print module, a voice print module or a voice module, wherein the face module is used to obtain the user's face information to form a trigger signal, thereby controlling the desorption between the first magnetic component and the second magnetic component; the fingerprint module can obtain the user's fingerprint information to form a trigger signal, thereby controlling the desorption between the first magnetic component and the second magnetic component; the palm print module can obtain the user's palm print information to form a trigger signal, thereby controlling the desorption between the first magnetic component and the second magnetic component; the voice print module can obtain the user's voice print information to form a trigger signal, thereby controlling the desorption between the first magnetic component and the second magnetic component; and the voice module can obtain the user's voice information to form a trigger signal, thereby controlling the desorption between the first magnetic component and the second magnetic component; that is, the input device can identify a specific user through biometric recognition technologies such as face, fingerprint, palm print, voice print or voice, thereby forming a trigger signal and controlling the desorption between the first magnetic component and the second magnetic component. Specifically, if the first magnetic component is configured as an electromagnet and the second magnetic component is a magnet, when the support frame 2 is in the closed state, the first magnetic component is energized and attracted to the second magnetic component. Then, when the input module receives an input trigger signal, it controls the first magnetic component to be energized so that the first magnetic component and the second magnetic component are repelled to release the adsorption, and the support frame 2 opens under the action of magnetism and gravity. Alternatively, the first magnetic component can be de-energized so that the first magnetic component and the second magnetic component cannot maintain attraction, and the support frame 2 opens under the action of gravity. The user controls the opening of the support frame 2 through the input device without touching or using other physical methods, which reduces contact, improves hygiene and convenience, and makes the rack suitable for environments that need to be kept clean. Alternatively, the second magnetic component can be configured as an electromagnet and the first magnetic component as a magnet, and the second magnetic component can be energized and attracted to the first magnetic component. Alternatively, both the first and second magnetic components can be configured as electromagnets, and the first and second magnetic components can be energized to attract or repel each other.
[0089] In one embodiment, the input device includes a voice module configured to recognize voice commands issued by a user and send a control signal to the first magnetic component or the second magnetic component to cause the first magnetic component to attract or repel the second magnetic component. The voice module may include a voice acquisition unit and a voice recognition unit, the voice acquisition unit and the voice recognition unit being electrically or communicatively connected, and the voice recognition unit being electrically connected to the first magnetic component or the second magnetic component. The voice acquisition unit is configured to acquire voice commands issued by the user, and the voice recognition unit is configured to recognize the voice commands and send a control signal to the first magnetic component or the second magnetic component to cause the first magnetic component to attract or repel the second magnetic component. After the voice recognition unit recognizes the user's voice command, it generates a corresponding control signal, which triggers the relevant circuitry on the first magnetic component or the second magnetic component, controlling the magnetic state of the electromagnet to achieve attraction or repulsion between the first magnetic component and the second magnetic component.
[0090] In one embodiment, the rack further includes a connector 6, which is detachably connected to the base 1 and configured to detachably connect to the operating equipment. The detachable connection between the connector 6, the base 1, and the operating equipment allows the rack to be quickly installed or removed as needed, enhancing operational flexibility. The connector 6 is detachably connected to the base 1 via bolts or screws, and is further detachably connected to the housing of the operating equipment via bolts, screws, or rivets.
[0091] In one embodiment, the material rack further includes a reader 7, which is mounted on the base 1 or the support frame 2; the reader 7 is used to obtain material information stored in the information storage 10. The reader 7 can automatically obtain material information stored in the information storage 10, reducing the need for manual input and improving work efficiency. The reader 7 can be mounted on the base 1 or the support frame 2, and the installation location can be flexibly selected according to actual needs. Specifically, the information storage 10 can be set as an RFID (Radio Frequency Identification) tag. The RFID tag contains a chip for storing data and an antenna for receiving and transmitting radio frequency signals. The reader 7 is responsible for transmitting radio frequency signals to activate the tag and receiving the response signal returned by the tag. Specifically, a mounting plate 12 is provided on the base 1, and the mounting plate 12 is located next to the support frame 2. The reader 7 is fixed to the mounting plate 12 so that the reader 7 is close to the information storage 10 carried by the material roll on the support frame 2, which facilitates the reader 7 to read the material information.
[0092] In one embodiment, a reader 7 is electrically connected to a controller of a processing device. The reader 7 transmits a radio frequency signal of a specific frequency via a transmitting antenna. When an RFID tag enters its effective working area, an induced current is generated, causing the RFID tag to transmit material information via its built-in antenna. The modulated signal transmitted from the RFID tag is received by the reader 7's receiving antenna and transmitted via the modulator of the receiving antenna to the reader 7's signal processing module. After demodulation and decoding by the signal processing module, the valid information is transmitted to the controller of the processing device for processing. Specifically, the RFID tag can be placed on the material 9. When the material 9 is installed on the support frame 2, the reader 7 obtains the material information from the RFID tag, ensuring the correctness of the installed material 9. Based on this material information, the controller of the processing device can adjust the operating parameters of the processing device to the processing parameters corresponding to the material 9. The material information can include material type, material color, and required processing temperature, thereby reducing the impact of human factors on incorrect material 9 setting. When the material rack is used in a 3D printing device, the reader 7 can ensure the stability and reliability of printing quality, thereby improving the success rate of printing.
[0093] The technical solution of the present application is to configure the support frame 2 to be rotatable relative to the first position and the second position of the base 1. When the support frame 2 is in the first position, the support frame 2 can be folded up, thereby reducing the space occupied by the material rack; when the support frame 2 is in the second position, the material 9 can be installed on the support frame 2, and the support frame 2 can be used to provide support for the material 9; the material rack has the advantage of a compact structure, which can reduce the space occupied by the material rack when it is folded up.
[0094] The present application also proposes a 3D printing device, which includes a material rack. The specific structure of the material rack refers to the above-mentioned embodiment. Since the present 3D printing device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.
[0095] The 3D printing device also includes a discharge device, which is used to drive the material 9 to unwind, that is, the discharge device provides tension for the wire of the material 9, pulls the wire and drives the reel to rotate.
[0096] When the 3D printing device is used in a laboratory environment, the support frame 2 can be folded up when not in use, which not only reduces the occupied space but also allows the reader 7 to obtain the material information stored in the information storage 10 for material management and improve experimental efficiency.
[0097] When the 3D printing device is used in a school or educational institution, the support frame 2 can be controlled to open or retract through an input device, thereby reducing direct contact between students and the machine and lowering safety risks.
[0098] When the 3D printing equipment is used on a production line, the support frame 2 is automatically popped out by the first force-applying member 3, which can reduce the interruption time of printing production; and the reader 7 is used to obtain material information stored in the information storage device 10, thereby improving the management efficiency of materials and thus improving production efficiency and production safety.
[0099] When the 3D printing device is used in a home environment, the material rack is popped out by the first force-applying member 3, thereby improving the user experience. At the same time, by making the support frame 2 openable and retractable, the 3D printing device is made more compact and easier to operate, thus adapting to a home environment with limited space.
[0100] The above description is merely an exemplary embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.
Claims
1. A material rack, characterized in that: include: base; a support frame configured to rotate relative to the base between a first position and a second position; Wherein, when in the first position, the support frame is close to the base; when in the second position, the support frame is away from the base and is configured to place consumables.
2. The rack according to claim 1, wherein: The base is provided with a receiving cavity, and the receiving cavity is provided with an opening; when in the first position, at least a portion of the support frame is placed in the receiving cavity.
3. The rack according to claim 2, wherein: The support frame has a first surface disposed close to the opening and a second surface facing away from the first surface; When the support frame is at the first position, the second surface is located in the receiving cavity or flush with the plane where the opening is located.
4. The material rack according to claim 3, characterized in that: The support frame includes at least two ribs arranged at intervals, and the envelope surface of the rib facing the opening forms the first surface, and the first surface is configured as an arc surface.
5. The material rack according to any one of claims 2 to 4, characterized in that A limiting portion is provided on the support frame and / or the receiving cavity; When the support frame is at the second position, the limiting portion is configured to limit the support frame from further rotation.
6. The material rack according to any one of claims 1 to 4, characterized in that The material rack further includes a first force applying member, which is used to drive the support frame to rotate between the first position and the second position.
7. The material rack according to claim 6, characterized in that: The first force applying member includes a first elastic member, two ends of which are respectively connected to the base and the support frame, and the first elastic member is used to move the support frame away from the base.
8. The material rack according to claim 6, characterized in that: The first force applying member includes a driving device, which is transmission-connected to the support frame to drive the support frame to rotate.
9. The material rack according to any one of claims 3 to 4, characterized in that The material rack further includes a rotating member rotatably disposed on the support frame, wherein the rotating member is configured to rotate relative to the support frame with the longitudinal direction of the support frame as an axis; Alternatively, at least a portion of the first surface is rotatable relative to the support frame with the length direction of the support frame as an axis.
10. The material rack according to claim 9, characterized in that: The rotating member includes a rotating drum and a tensioning member arranged on the rotating drum, the tensioning member includes at least two elastic segments, one end of the elastic segment is connected to the rotating drum, and the other end of the elastic segment is provided with an abutment portion, the abutment portion is spaced apart from the outer surface of the rotating drum, and the abutment portion is used to abut against the material.
11. The material rack according to claim 9, characterized in that: The rotating member is configured to rotate along a first direction with the length direction of the support frame as the axis under the drive of the discharging device; the material rack also includes a second force-applying member, which is configured to drive the rotating member to rotate along a second direction with the length direction of the support frame as the axis, and the second direction is opposite to the first direction.
12. The material rack according to claim 11, characterized in that: The second force-applying member includes a second elastic member and a clutch, the clutch includes a first mating member and a second mating member, the first mating member is connected to the support frame, and the clutch is configured to enable the first mating member and the second mating member to rotate relative to each other after the rotating member rotates a preset number of turns in the first direction; Two ends of the second elastic member are respectively connected to the second matching member and the rotating member. The second elastic member is used to enable the rotating member to rotate relative to the supporting frame along the second direction.
13. The material rack according to any one of claims 2 to 4, characterized in that The support frame has a first end and a second end opposite to each other in the length direction, the first end is connected to the base through a rotating shaft, and the second end rotates between the first position and the second position.
14. The material rack according to claim 13, wherein: The second end of the support frame is provided with an extension portion, and the wall surface of the receiving cavity corresponding to the second end is provided with a slot, and when the support frame is in the first position, the extension portion is configured to be inserted into the slot; and / or, The extension portion is configured to be arc-shaped, and a center line of the arc of the extension portion is perpendicular to a rotation axis of the support frame.
15. The material rack according to any one of claims 1 to 4, characterized in that The material rack further includes a fixing structure connected to the base, and the fixing structure is configured to fix the support frame in the first position.
16. The material rack according to claim 15, characterized in that The fixing structure includes a first fastener and a second fastener, the first fastener is connected to the base, the second fastener is connected to the support frame, and the first fastener and the second fastener are buckled; or, The fixing structure includes a first magnetic component and a second magnetic component, the first magnetic component is connected to the base, the second magnetic component is connected to the support frame, and the first magnetic component and the second magnetic component attract each other.
17. The material rack according to claim 16, characterized in that The material rack also includes an input device, at least one of the first magnetic component and the second magnetic component is configured as an electromagnet; the input device is electrically connected to the first magnetic component and / or the second magnetic component configured as an electromagnet; the input device is used to obtain an input trigger signal to release the adsorption between the first magnetic component and the second magnetic component.
18. The material rack according to any one of claims 1 to 4, characterized in that The material rack further includes a connecting piece, the connecting piece is detachably connected to the base, and the connecting piece is used to be detachably connected to the operating equipment; and / or, The material rack further includes a reader, which is mounted on the base or the support frame; the reader is used to obtain material information stored in the information storage device; and the reader is used to be electrically connected to the controller of the operating equipment.
19. A 3D printing device, characterized in that: Comprising a material rack as claimed in any one of claims 1 to 18.