Material throwing device and 3D printer

Abstract

According to the material throwing device and the 3D printer, waste materials extruded to a bearing area are pushed mainly through cooperation of a moving part and a force application part, and the situation that the moving space of a printing head is affected due to accumulation of the waste materials is avoided. According to the main technical scheme, the material throwing device comprises a main body, the main body comprises a bearing area, and the bearing area is used for bearing waste materials; the position of the moving part comprises a first position and a second position; and the force application piece is at least connected with the moving piece, and the force application piece is at least used for driving the moving piece to move from the second position to the first position so as to push the waste materials on the bearing area. The waste material throwing device is mainly used for throwing waste materials.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a material throwing device and a 3D printer. Background Art

[0002] In FDM printers, the filament is fed in filament form and is transported from the extruder to the nozzle. The nozzle heats and melts the filament and moves along the cross-sectional contour and filling trajectory of the part, while extruding the molten filament to achieve three-dimensional printing.

[0003] When color printing is required, it is necessary to change the consumables of different colors. Usually, a cutter is equipped on the print head to cut the consumables of the original color and then feed in new consumables. For example, the patent with patent number CN113844030A discloses a 3D printer and a method for a 3D printer. When changing materials, the wire cutter cuts the wire into a first wire segment outside the wire channel and a second wire segment inside the wire channel. This results in a portion of the consumables of the original color still being in the print head. When spraying the next time, the consumables of the original color will be sprayed first, resulting in insufficient color accuracy. In the prior art, there is a solution that first extrude the consumables of the original color to a specified position and then print. However, in the case of frequent color changes, the consumables extruded due to the color change will accumulate, and the accumulation area needs to be within the reach of the print head, which leads to the problem of occupying the print head moving space and printing space. Utility Model Content

[0004] In view of this, in order to solve at least one of the above technical problems, the utility model provides a throwing device and a 3D printer.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] On the one hand, the utility model provides a throwing device, comprising:

[0007] The main body includes a supporting area, and the supporting area is used to receive waste materials;

[0008] A moving member, wherein the position of the moving member includes a first position and a second position;

[0009] A force applying member, the force applying member is at least connected to the moving member, and the force applying member is at least used to drive the moving member to move from the second position to the first position to push the waste on the supporting area.

[0010] On the other hand, the utility model further provides a 3D printer, comprising any one of the above-mentioned throwing devices.

[0011] The utility model proposes a throwing device and a 3D printer, which mainly push the waste material extruded into the supporting area through the cooperation of a moving part and a force-applying part, so as to avoid the waste material accumulation affecting the moving space of the print head. In the prior art, when color printing is required, the consumables of the original color are partially in the print head, and there is a solution of first extruding the consumables of the original color to a specified position and then printing. However, in the case of frequent color changes, the consumables extruded due to color changes will accumulate, and the accumulation area needs to be within the reach of the print head, which leads to the problem of occupying the moving space of the print head and the printing space. Compared with the prior art, in the present application document, when it is necessary to change the color, the print head is moved to correspond to the supporting area, the waste material is squeezed into the supporting area, and then the force-applying member drives the movable member to move and pass over the supporting area, pushing the waste material in the supporting area, thereby avoiding the accumulation of waste material in the supporting area. When the color is changed next time, the print head can still move to the same position to squeeze out the waste again, thereby avoiding the accumulation of waste affecting the movement of the print head. The movable member can push the waste material to separate from the main body, and then it can be collected together to avoid the waste material scattering and affecting the cleanliness of the printing environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the three-dimensional structure of a throwing device provided in an embodiment of the utility model;

[0013] Figure 2 A schematic diagram of the main structure of a throwing device provided in an embodiment of the utility model;

[0014] Figure 3 A rear view structural schematic diagram of a throwing device provided in an embodiment of the utility model;

[0015] Figure 4 A schematic diagram of the structure of a throwing device provided by an embodiment of the utility model from a bottom view;

[0016] Figure 5 A schematic diagram of the top view of a throwing device provided in an embodiment of the utility model;

[0017] Figure 6 A right side structural schematic diagram of a throwing device provided in an embodiment of the utility model;

[0018] Figure 7 A left-side structural schematic diagram of a throwing device provided in an embodiment of the utility model;

[0019] Figure 8 A schematic diagram of the explosion structure of a material throwing device provided in an embodiment of the utility model;

[0020] Fig. 9 A schematic diagram of a first structure of an X-axis mechanism, a print head and a material throwing device provided by an embodiment of the utility model when the moving part is in a first position;

[0021] Fig.10 for Fig. 9 A partial enlarged view of the X-axis mechanism, the print head and the ejection device in area A is shown;

[0022] Fig.11 A schematic diagram of the structure of an X-axis mechanism, a print head and a material throwing device provided in an embodiment of the utility model when the moving part is in the third position;

[0023] Fig.12 for Fig.11 A partial enlarged view of the X-axis mechanism, the print head and the throwing device in area B is shown;

[0024] Fig.13 A schematic diagram of a second structure of an X-axis mechanism, a print head and a material throwing device provided by an embodiment of the utility model when the moving part is in the first position;

[0025] Fig.14 for Fig.13 A partial enlarged view of the X-axis mechanism, print head and ejection device in area C is shown. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the following is a detailed description of the specific optional implementation mode, structure, characteristics and effects of the throwing device proposed according to the utility model in combination with the accompanying drawings and preferred embodiments.

[0027] On the one hand, if Figure 1-8 As shown, the embodiment of the utility model provides a throwing device for a 3D printer, comprising:

[0028] The main body 100 includes a supporting area 101, and the supporting area 101 is used to receive the waste material 50;

[0029] A moving member 200, wherein the position of the moving member 200 includes a first position and a second position;

[0030] The force applying member 300 is at least connected to the moving member 200 . The force applying member 300 is at least used to drive the moving member 200 to move from the second position to the first position, so as to push the waste 50 on the supporting area 101 .

[0031] In an optional embodiment, the 3D printer mainly includes a gantry mechanism or a single cantilever mechanism, a base, a printing platform, an X-axis mechanism 20 and a print head 20. The printing platform is connected to the base, the gantry mechanism is connected to the base and is erected on the printing platform, and the X-axis mechanism 20 is driven and connected to the gantry mechanism. The X-axis mechanism 20 may include an X-axis guide frame and a driving mechanism, the print head 20 is slidably connected to the X-axis guide frame, the driving mechanism is connected to the print head 20, and the driving mechanism is used to drive the print head 20 to move along the X-axis guide frame. The main body 100 of the throwing device can be connected to the X-axis mechanism 20, or the main body 100 can also be connected to other supporting structures of the 3D printer, such as being connected to the gantry mechanism or the base, or the main body 100 can be connected to a supporting structure independent of the 3D printer, and the purpose is to fix the position relative to the X-axis guide frame. It can be understood that the fixed position of the main body 100 should meet the requirement that the print head 20 can be moved to correspond to the supporting area 101 in the vertical direction. The connection of the main body 100 can be bolted. In one embodiment, if Figure 8 As shown, the main body 100 includes a limit plate 140, one side of which is bent upward to form a limit head, and a connecting block is arranged on the X-axis guide frame. The limit plate 140 is connected to the bottom of the connecting block by bolts, and the limit head is wrapped around the side wall of the connecting block and abuts against the connecting block in the X-axis direction to limit the position of the main body 100, so as to make the position of the main body 100 more stable.

[0032] The main body 100 can be in various shapes, such as a planar plate-like structure, or, depending on the needs, a more complex bending structure, and a plane can be provided in the supporting area 101. The supporting area 101 is used to receive the waste material 50 ejected by the nozzle. Since the waste material 50 still has a certain temperature when ejected, the waste material 50 will adhere to the supporting area 101 and gradually solidify after contacting the supporting area 101. The moving member 200 is used to provide an external force to push the waste material 50 to break away from the supporting area 101. When the moving member 200 moves between the first position and the second position, at least a portion of the structure of the moving member 200 is located on different sides of the supporting area 101, and then the moving member 200 is used to push the partial structure of the waste material 50 to move between the first position and the second position, and will sweep over the supporting area 101 where the waste material 50 falls. In other words, when the moving member 200 moves between the first position and the second position, at least a portion of the structure of the moving member 200 is swept or passed by the top or upper surface of the supporting area 101. The different sides of the supporting area 101 can be opposite sides or adjacent sides. The portion of the moving member 200 corresponding to the supporting area 101 can slide against the supporting area 101, or there can be a small gap, such as a distance of 0.5 mm, 1 mm, etc., to ensure that the moving member 200 moves smoothly and that the moving member 200 can scrape off the waste material 50 above the supporting area 101.

[0033] Before the nozzle extrude waste material 50, the force applying member 300 drives the movable member 200 to move to the second position, or can provide external force to drive the movable member 200 to move to the second position by an additional driving body, so that at least part of the structure of the movable member 200 is located on one side of the supporting area 101. After the nozzle extrude waste material 50, the external force is withdrawn, and the force applying member 300 acts on the movable member 200, so that the movable member 200 moves to the first position, and this moving process will promote the waste material 50 to move. In some embodiments, the movable member 200 also includes the third position between the first position and the second position, and the movable member 200 will pass through the third position in the process of moving from the first position to the second position. As in the embodiment in which the print head 30 is used as the power driving movable member 200 to move, the movable member 200 can be driven to move from the first position to the third position first, and waste material 50 can be sprayed to the supporting area 101 at this time, and then the movable member 200 is driven to continue to move to the second position in the same direction from the third position, and then the effect of the print head 30 and the movable member 200 is released, and the movable member 200 returns to the first position. The following text will further explain in detail the functions of the print head 30 and the moving member 200 in combination with a more specific embodiment.

[0034] In some optional embodiments, the moving part has acceleration during the movement from the second position to the first position. After the waste 50 is pushed and moved, it can be moved out of the main body 100 by inertia, and then projected outward along a trajectory that is approximately parabolic, that is, the waste 50 has acceleration when it is pushed out, and does not perform free fall after leaving the supporting area 101. To avoid the accumulation of waste 50 pushed out multiple times in the same area, a material box can be set at a designated position, and the material box is used to receive the waste 50 pushed out from the supporting area 101 or from the main body 100. Then, the moving part 200 can repeat the above operation while waiting for the next material change at the first position, or, after the material throwing is completed, the moving part 200 can be directly moved to the second position to wait for the next nozzle to extrude the waste 50.

[0035] A material throwing device and a 3D printer proposed in the embodiment of the utility model. The waste material extruded into the supporting area is pushed mainly through the cooperation of the moving part and the force-applying part, so as to avoid the accumulation of waste material and affect the moving space of the print head. In the prior art, when color printing is required, the consumable part of the original color is in the print head, and there is a scheme of first extruding the consumable material of the original color to the specified position, and then printing. However, in the case of frequent color changes, the consumable material extruded due to the color change will accumulate, and the accumulation area needs to be within the reachable range of the print head, which leads to the problem of occupying the moving space of the print head and the printing space. Compared with the prior art, in the present application document, when the color needs to be changed, the print head is moved to the supporting area, the waste material is extruded into the supporting area, and then the force-applying part drives the moving part to move and pass through the supporting area, pushing the waste material in the supporting area to be thrown away from the area, and then avoiding the accumulation of waste material in the supporting area. When the color is changed next time, the print head can still move to the same position to extrude the waste again, so as to avoid the accumulation of waste material affecting the movement of the print head.

[0036] In one embodiment, one end of the force-applying member 300 is connected to the moving member 200, and the other end can be connected to the aforementioned X-axis mechanism 20, the gantry mechanism or the base, or can be connected to a support structure independent of the 3D printer, and can also be connected to the main body 100. In the following embodiments, the connection between the force-applying member 300 and the main body 100 is taken as an example, which can facilitate the installation of the throwing device.

[0037] The force applying member 300 can drive the moving member 200 to move in a variety of ways, and can only drive the moving member 200 to move from the second position to the first position, or can drive the moving member 200 to move back and forth between the second position and the first position. Two specific implementations are given below as examples:

[0038] In one embodiment, the force-applying member 300 includes an elastic member, which may be a spring, such as a tension spring, a compression spring or a torsion spring, or other members made of elastic material. When the movable member 200 moves from the first position to the second position, the elastic member stores energy, and at this time, the movable member 200 may be driven by an external force. After the external force is released, the movable member 200 will move from the second position to the first position under the action of the energy released by the elastic member. The force-applying member 300 is connected to the main body 100 by snap-on, hanging, sleeve, bolted, plug-in or embedded connection, and / or the force-applying member 300 is connected to the movable member 200 by snap-on, hanging, sleeve, bolted, plug-in or embedded connection. Figure 3 As shown, a first hanging portion 310 and a second hanging portion 320 for hanging the elastic member are respectively provided on the main body 100 and the moving member 200, so as to facilitate the disassembly, assembly and replacement of the spring.

[0039] In another embodiment, the force-applying member 300 includes a driving unit and a transmission unit, the driving unit is connected to the moving member 200 through the transmission unit, and the driving unit is used to drive the moving member 200 to move between the second position and the first position through the transmission unit. That is, the movement of the moving member 200 between the second position and the first position can be completed by the force-applying member 300 alone, without the aid of external force. The driving unit can be a motor, and the transmission unit can include a screw and a nut. The moving member 200 is connected to the nut, and the screw is connected to the motor. The motor drives the screw to rotate, and then the thread pushes the moving member 200 to move back and forth. Alternatively, the driving unit can be a motor, and the transmission unit can be a conveyor belt. By adopting the method of elastic members, compared with the method of driving units and transmission units, the weight of the throwing device is greatly reduced, the driving burden of the gantry mechanism is reduced, and excessive energy consumption of the driving unit and the transmission unit is avoided.

[0040] In one embodiment, in order to facilitate the fixation of the throwing device and ensure the stability of the moving member 200 during the movement, the moving member 200 is movably connected to the main body 100 .

[0041] There may be multiple ways of active connection. In one embodiment, the throwing device further includes at least one first sliding part 510 and at least one second sliding part 520. The first sliding part 510 is provided on one of the main body 100 and the moving member 200, and the second sliding part 520 is provided on the other of the main body 100 and the moving member 200. The main body 100 and the moving member 200 are slidably connected through the interaction between the first sliding part 510 and the second sliding part 520. The sliding may be a linear sliding. When the moving member 200 moves between the first position and the second position, part of the structure is located on opposite sides of the supporting area 101. The sliding may also be an arc sliding. When the moving member 200 moves between the first position and the second position, part of the structure may be located on adjacent sides of the supporting area 101. In some other embodiments, the movable member 200 is rotatably connected to the main body 100, such as one end of the movable member 200 is rotatably connected to the main body 100, and the other end is used to push the waste 50. When the movable member 200 moves between the first position and the second position, part of the structure is located on two adjacent sides of the supporting area 101, and the first position and the second position of the movable member 200 refer to the rotational position of the movable member 200.

[0042] In the embodiment in which the main body 100 and the moving member 200 are slidably connected, the first sliding part 510 may include a slide groove, and the second sliding part 520 may include a slider. If the main body 100 is provided with a slide groove, and the moving member 200 is provided with a slider, the slider slides into the slide groove. Alternatively, the first sliding part 510 includes a sliding rod, and the second sliding part 520 includes a sliding hole. If the main body 100 is provided with a sliding hole, and the moving member 200 is provided with a sliding rod, the sliding rod slides through the sliding hole.

[0043] In one embodiment, the throwing device further includes at least one sleeve 530, which is connected to one of the main body 100 and the moving member 200, and the sleeve 530 is inserted into the sliding hole, and the sliding rod is slidably inserted into the sleeve 530. The sleeve 530 can make the sliding rod slide more smoothly, increase the force-bearing area of ​​the sliding rod, and reduce the wear of the sliding rod due to friction with the edge of the sliding hole.

[0044] Further, the throwing device further comprises a sleeve connecting plate 540, the sleeve 530 is connected to the sleeve connecting plate 540, and the axial ends of the sleeve 530 are located on opposite sides of the sleeve connecting plate 540, the sleeve connecting plate 540 is connected to one of the main body 100 and the moving part 200, and one end of the sleeve 530 is embedded in the sliding hole. The connecting plate 540 can be connected to the main body 100 by bolts, and the connecting plate 540 can be used to connect multiple sleeves 530 for fixing the sleeves 530. The sleeve 530 and the connecting plate 540 can be integrally formed.

[0045] In one embodiment, the throwing device further includes: a first acting member 400, the first acting member 400 is connected to the moving member 200, and the first acting member 400 is used to apply an external force to move the moving member 200 from the first position to the second position. In an embodiment in which the force-applying member 300 can only provide the moving member 200 with an external force to move from the second position to the first position, such as an embodiment in which the force-applying member 300 is an elastic member, an external force needs to be applied to move the moving member 200 to the second position, and the subject that applies the external force can be of various types, such as an additional driving mechanism, or it can be a print head 30. This embodiment will be described in detail in conjunction with the print head 30 later.

[0046] In one embodiment, the main body 100 includes a vertical plate 110 and a receiving plate 120, the vertical plate 110 and the receiving plate 120 are connected, and the vertical plate 110 and the receiving plate 120 are at a preset angle, such as a 90-degree angle. The receiving plate 120 includes a supporting area 101, and the receiving plate 120 is an approximately L-shaped plate structure. The moving member 200 includes a moving plate 210 and a push plate 220, the moving plate 210 and the push plate 220 are connected, the moving plate 210 is arranged opposite to the vertical plate 110, and the moving plate 210 can be parallel to the vertical plate 110, and both are arranged in the vertical direction. The push plate 220 and the receiving plate 120 are at a preset angle, such as a 90-degree angle, and the push plate 220 is used to push the waste 50. The aforementioned sliding hole is opened on the vertical plate 110, and the sliding rod is set on the movable plate 210. On the one hand, it makes the structure of the main body 100 and the movable part 200 more concise and light in weight. On the other hand, the area for receiving and pushing the waste 50 is separated from the area of ​​the sliding connection, thereby preventing the waste 50 from contaminating the area of ​​the sliding connection.

[0047] In one embodiment, the vertical plate 110 is used to limit the extreme position of the moving member 200 moving from the second position to the first position by abutting against the moving plate 210. That is, the moving member 200 is pulled by the force-applying member 300 to move to the first position until the moving plate 210 abuts against the vertical plate 110, and stops at the first position, ensuring the accurate position of the moving plate 210 or the first acting member 400, and facilitating the docking with the first acting member 400 when external force is applied. In a more specific embodiment, the throwing device also includes a buffer 600, and the buffer 600 is connected to at least one of the vertical plate 110 and the moving plate 210, and the buffer 600 is used to buffer the impact between the vertical plate 110 and the moving plate 210. The buffer 600 can be made of a flexible material with a certain supporting force, such as rubber, which can reduce the vibration and noise caused by the impact and avoid wear at the impact position.

[0048] In order to reduce the impact position and reduce the size of the buffer 600 to reduce the weight, in one embodiment, the side of the movable plate 210 facing the vertical plate 110 is bent to form a bending area, and the edge of the bending area is used to abut against the vertical plate 110 to limit the extreme position of the movable member 200 moving from the second position to the first position, and the buffer 600 only corresponds to the edge of the bending area.

[0049] In one embodiment, the moving direction of the movable member 200 from the second position to the first position is a preset direction, and the supporting area and the vertical plate 110 are staggered in the preset direction so that the waste 50 can be pushed out through the edge of the supporting area 101; in one embodiment, the preset direction is a direction away from the printing platform of the printer to prevent the waste from falling onto the printing platform after being pushed out, thereby affecting the model printing.

[0050] In order to prevent the waste 50 pushed out of the supporting area 101 from accumulating, after the waste 50 is pushed out of the supporting area 101, it will rely on inertia to separate from the main body 100 from the edge of the supporting area 101 and move in an approximately parabolic trajectory. The supporting area and the vertical plate 110 are staggered in a preset direction, so that the vertical plate 110 and the movable plate 210 give way to the supporting area 101, and then will not hinder the throwing of the waste 50. Specifically, as Figure 5 As shown, the receiving plate 120 includes a supporting area 101 and an extension area 102. The extension area 102 is connected to the vertical plate 110. The supporting area 101 is away from the vertical plate 110 and connected to the extension area 102. The supporting area 101 can be arranged vertically to the extension area 102, so that the receiving plate 120 is an approximately L-shaped plate structure, and the supporting area 101 is in a protruding and suspended state.

[0051] In one embodiment, if Figure 8As shown, the main body 100 also includes a enclosure, which is at least used to limit the moving direction of the waste 50, so that the waste 50 is thrown outward from a side designated by the supporting area 101, such as to the outside of the 3D printer or the outside of the printing platform, and to prevent the waste 50 from falling into other areas of the main body 100.

[0052] In one embodiment, the enclosure includes a first enclosure 131, which is connected to the main body 100 or the movable part 200, and the first enclosure 131 corresponds to at least a portion of the edge of the supporting area 101. The first enclosure 131 and the supporting area 101 form a preset angle, and the first enclosure 131 is parallel to the moving direction of the movable part 200, and the preset angle is not less than 90 degrees.

[0053] In the embodiment where the main body 100 includes the receiving plate 120, and the receiving plate 120 includes the supporting area 101 and the extension area 102, the first enclosure 131 can be directly connected to the edge of the supporting area 101 away from the extension area 102, or the first enclosure 131 can be connected to the moving member 200, such as connected to the push plate 220 of the moving member 200, and the first enclosure 131 is opposite to the edge of the supporting area 101 away from the extension area 102. The first enclosure 131 and the supporting area 101 can be perpendicular to each other; or the first enclosure 131 can be inclined toward the outer side of the supporting area 101 in the upward direction away from the supporting area 101, or in other words, the side of the first enclosure 131 connected to the supporting area 101 is closer to the waste 50. The first enclosure 131 is parallel to the direction in which the movable member 200 moves from the second position to the first position. The first enclosure 131 prevents the waste material 50 from falling from the edge of the supporting area 101 to the forming platform, and guides the movement of the waste material 50, so that the waste material 50 moves along the direction in which the second position moves toward the first position, and then leaves the supporting area 101 from a preset side of the supporting area 101.

[0054] In another embodiment, the enclosure includes a second enclosure 132 , which is connected to the main body 100 , and the second enclosure 132 abuts against a partial structure of the moving member 200 to limit the moving direction of the moving member 200 .

[0055] In the embodiment where the main body 100 includes the receiving plate 120, and the receiving plate 120 includes the supporting area 101 and the extension area 102, the second enclosure 132 is connected to the extension area 102. Further, the moving member 200 also includes a connecting rod 230, which is respectively connected to the moving plate 210 and the push plate 220. The second enclosure 132 can be arranged parallel to the moving direction of the moving member 200, and abuts against the connecting rod 230, thereby playing a role in stabilizing the movement of the moving member 200.

[0056] In another embodiment, the enclosure includes a second enclosure 132, which is connected to the main body 100. The main body 100 also includes an extension area 102 that is different from the supporting area 101. The second enclosure 132 is located between the supporting area 101 and the extension area 102, and forms a preset angle with the extension area 102. The second enclosure 132 is used to prevent waste 50 from entering the extension area 102.

[0057] The second enclosing plate 132 may be perpendicular to the extension area 102, and the second enclosing plate 132 may be connected to the edge of the extension area 102 near the supporting area 101. The second enclosing plate 132 blocks the waste 50 thrown out of the supporting area 101 from entering the extension area 102, thereby avoiding affecting the movement of the moving member 200 corresponding to the extension area 102.

[0058] The first enclosure 131 and the second enclosure 132 can be provided at the same time, and the waste material 50 will be thrown out between the first enclosure 131 and the second enclosure 132. The enclosure can also shield the moving part 200 and other parts located in the enclosure, making the throwing device beautiful as a whole.

[0059] In one embodiment, the throwing device further includes: a guide member 700. The moving member 200 further includes a connecting rod 230, and the connecting rod 230 is respectively connected to the moving plate 210 and the push plate 220. The guide member 700 is connected to the main body 100, and a sliding groove 710 or a sliding hole is provided on the guide member 700, and the connecting rod 230 is slidably embedded in the sliding groove 710, or the connecting rod 230 is slidably inserted in the sliding hole.

[0060] The guide member 700 can be connected to the main body 100 by bolts, or it can be not connected to the main body 100, but supported by an additional supporting structure. When in use, it can be fixed relative to the main body 100, such as being connected to the support frame of the 3D printer, such as being connected to the X-axis mechanism 20. In order to reduce the weight of the moving member 200, the area of ​​the moving plate 210 and the push plate 220 should be as small as possible under the premise of meeting the functional requirements, and the moving plate 210 and the push plate 220 are connected by a connecting rod 230, and the connecting rod 230 can be a hollow rod. The sliding connection of the connecting rod 230 and the guide member 700 further stabilizes the stability of the sliding connection between the moving member 200 and the main body 100, and avoids the moving member 200 from tilting or shaking. In addition, the guide member 700 can be set at a position closer to the push plate 220 to avoid the push plate 220 from sinking.

[0061] In one embodiment, the throwing device further includes: a scraper 800, the scraper 800 includes a scraper end, and the scraper end is used to act with the nozzle of the 3D printer to wipe the nozzle.

[0062] The scraper 800 is used to move relative to the nozzle to wipe the nozzle to avoid residual consumables, resulting in inaccurate color or lumps. The scraper end can be upward, and the scraper 800 including at least part of the scraper end is made of flexible material. The height of the scraper end can be slightly higher than the bottom of the nozzle, thereby playing a role of squeezing and wiping.

[0063] In one embodiment, at least a portion of the scraper 800 that interacts with the nozzle is coated with an anti-stick coating to prevent consumables from remaining on the scraper 800, thereby ensuring the effectiveness of the scraper 800 and avoiding secondary contamination of the nozzle.

[0064] In one embodiment, the scraper 800 is fixed relative to the main body 100, such as being connected to the main body 100, or connected to other supporting structures of the 3D printer such as the X-axis mechanism 20, and can be wiped by the movement of the print head 30. Alternatively, the scraper 800 can be connected to the moving member 200, and the scraper 800 wipes the nozzle during the movement of the moving member 200 from the second position to the first position. If the scraper 800 is connected to the push plate 220 of the moving member 200, it can be a silicone scraper 800 sleeved on the push plate 220, and the scraper 800 moves with the push plate 220, which will interfere with the print head 30 and then wipe the print head 30. Alternatively, in some embodiments, the scraper 800 can be equivalent to the push plate 220, and the push plate 220 can realize the function of the aforementioned scraper 800.

[0065] In one embodiment, if Figure 8 As shown, a deformation hole 810 is provided on the scraper 800 , and at least a part of the area of ​​the scraper 800 that interacts with the nozzle is deformed through the deformation hole 810 .

[0066] The deformation hole 810 is a through hole that passes through both sides of the scraper 800 in the horizontal direction. When the nozzle squeezes the top of the scraper 800, the scraper 800 will be deformed through the deformation hole 810, thereby avoiding excessive pressure on the nozzle to affect the stability of the nozzle connection, and the wiping force can be ensured through the rebound force of the deformation hole 810.

[0067] In one embodiment, the throwing device further includes: a limit member 900, and the relative position of the limit member 900 and the main body 100 is fixed. The limit member 900 is used to limit the extreme position of the movable member 200 moving from the first position to the second position. In other words, in the second position, the movable member 200 abuts against the limit member 900. Then the movable member 200 cannot continue to move, and can be used to separate from the external force applying body, such as the print head 30, which will be further described in conjunction with the implementation method below. The limit member 900 can be a bolt, and an extension plate is processed on the main body 100, and the limit member 900 is connected to the extension plate.

[0068] On the other hand, Figure 9-14 As shown, the utility model further provides a 3D printer, including any one of the above-mentioned throwing devices 10, including the advantages of any one of the above-mentioned throwing devices 10, which will not be repeated here.

[0069] In one embodiment, the 3D printer further includes: an X-axis mechanism 20 and a print head 30, the ejection device 10 is fixedly connected to the X-axis mechanism 20, the print head 30 is movably connected to the X-axis mechanism 20, and the print head 30 includes a nozzle 31. When the print head 30 ejects waste material 50, the nozzle 31 corresponds to the supporting area 101.

[0070] The throwing device 10 is fixedly connected to the X-axis mechanism 20. Specifically, the main body 100 can be fixed to the X-axis mechanism 20 by bolts, and is located near one end of the X-axis mechanism 20. The moving part 200 moves from the second position to the first position toward the outside of one end of the X-axis mechanism 20, that is, the waste material 50 is thrown away from the printing area. In the aforementioned embodiment including the scraper 800, the scraper end of the scraper 800 is slightly higher than the bottom end of the nozzle 31, such as 1 mm, 2 mm, etc., so as to wipe the nozzle hole and the surrounding area.

[0071] In one embodiment, the aforementioned throwing device includes a first acting member 400, the first acting member 400 is connected to the moving member 200, the first acting member 400 is used to apply an external force to move the moving member 200 from the first position to the second position, and the force member 300 is an elastic member, such as an embodiment of a tension spring, the 3D printer also includes a second acting member 40, and the second acting member 40 is connected to the print head 30. The second acting member 40 acts on the first acting member 400 so that the print head 30 drives the moving member 200 to move, the force member 300 stores energy, and when the moving member 200 is in the second position, the second acting member 40 is disengaged from the first acting member 400, and the moving member 200 moves to the first position to push the waste material 50. The position of the moving member 200 also includes a third position, and the third position is located between the first position and the second position. When the moving member 200 is in the third position, the supporting area supports the waste material.

[0072] The first acting member 400 may include at least one of an adsorbent, an adsorbent surface, a magnetic member, a clamping member, and an elastic hanging member. The second acting member 40 includes at least one of an adsorbent, an adsorbent surface, a magnetic member, a clamping member, and an elastic hanging member that can interact with or detach from the first acting member 400. For example, both the first acting member 400 and the second acting member 40 are magnetic members. Before spraying the waste material, the movable member 200 is located in the first position, waiting to receive the waste material 50. At this time, there is no waste material 50 on the supporting area 101, and the elastic member is in a natural state. When the print head 30 needs to spray out the waste material 50, the print head 30 moves to the rightmost position, such as Figure 9-10As shown, at this time, the moving member 200 is still in the first position, and the second acting member 40 will be magnetically attracted to the first acting member 400. The print head 30 attracted with the moving member 200 moves to the left, and the moving member 200 will move to the left synchronously with the print head 30, and the elastic member will be stretched to store energy. After synchronously moving a preset distance, the moving member 200 reaches the third position, as shown in FIG. Figure 11-12 As shown, the nozzle 31 corresponds to the supporting area 101. At this time, the print head 30 stops moving, and the nozzle 31 starts to extrude the waste material. It can be understood that when the nozzle 31 corresponds to the supporting area 101, the movable member 200 has not reached the second position. The preset distance can be 3 mm, 5 mm, 8 mm, etc. After the waste material 50 is extruded, the print head 30 moves to the left and leaves the third position to return to continue printing the model. Since the print head 30 and the movable member 200 are still in the adsorption state, the print head 30 will drive the movable member 200 to continue to move to the left from the third position. At this time, the elastic member continues to be stretched to store energy. In the embodiment in which the aforementioned throwing device also includes a limit member 900, when the movable member 200 is pulled to the second position by the print head 30, the limit member 900 will limit the continued movement of the movable member 200, and then the second acting member 40 is separated from the first acting member 400. Alternatively, when the moving member 200 moves to the second position, the external force on the second acting member 40 and the first acting member 400 reaches the limit of the interaction force, such as the limit of the magnetic attraction force, and the second acting member 40 and the first acting member 400 are naturally separated. Then, the moving member 200 or the scraper member 800 will move to the right quickly to the first position under the force of the elastic member releasing energy, and will not stay at the third position during this process. After reaching the first position, Figure 13-14 As shown, the extruded waste 50 is then thrown away, and in the process of moving to the first position, the scraper 800 will interfere with the nozzle 31, and then wipe the nozzle 31. In the implementation method that relies on the natural separation of the second acting member 40 and the first acting member 400, the second position may change each time it is used. For example, in the implementation method where the second acting member 40 is magnetically connected to the first acting member 400, the magnetism of the magnetic member will weaken after long-term use, and then the second position will be closer to the first position after a period of use. In the present application, the second position does not refer to a specified position. The second position can be understood as the starting position where the moving member 200 loses the external force that counteracts the force-applying member 300 and moves to the first position.

[0073] For another example, in an embodiment where one of the first and second functional members 400 and 40 is an adsorption member and the other is an adsorption surface, when the print head 30 moves to the right to the extreme position, the adsorption member will be attracted to the adsorption surface, and the print head 30 moves to the left, which will drive the movable member 200 to move until it interacts with the limiting member 900 and the adsorption member is separated from the adsorption surface. The adsorption member can be a suction cup, and the adsorption surface is a smooth surface. Alternatively, the first and second functional members 400 and 40 are both clamping members, or elastic clamping members. When the print head 30 moves to the right to the extreme position, the two clamping members clamp each other by extrusion deformation. When the print head 30 interacts with the limiting member 900, the two clamping members are separated from each other by deformation. Examples are not given one by one here.

[0074] In one embodiment, when the first action member 400 includes the magnetic member 410, the first action member 400 also includes a protective cover 420, which surrounds the outer periphery of at least a portion of the magnetic member 410, and at least one of the magnetic member 410 and the protective cover 420 is connected to the moving member 200. The protective cover 420 can be a flexible outer cover, such as a silicone cover, which can protect the magnetic member 410 on the one hand, and prevent the second action member 40 from directly impacting the magnetic member 410 on the other hand, thereby preventing wear and noise caused by the impact.

[0075] The utility model also provides the following implementation modes:

[0076] Label 1. A throwing device, comprising:

[0077] The main body 100 includes a supporting area 101, and the supporting area 101 is used to receive the waste material 50;

[0078] A moving member 200, wherein the position of the moving member 200 includes a first position and a second position;

[0079] The force applying member 300 is at least connected to the moving member 200 . The force applying member 300 is used to drive the moving member 200 to move at least from the second position to the first position, so as to push the waste 50 on the supporting area 101 .

[0080] Label 2, according to the throwing device of label 1, wherein:

[0081] The force applying member 300 is also connected to the main body 100;

[0082] And / or, the force applying member 300 includes an elastic member, and when the moving member 200 moves from the first position to the second position, the elastic member stores energy, and when the moving member 200 moves from the second position to the first position, the elastic member releases energy;

[0083] And / or, the force-applying member 300 is connected to at least one of the main body 100 and the moving member 200 by means of a snap connection, a hook connection, a sleeve connection, a bolt connection, a plug connection or an embedded connection;

[0084] And / or, the force applying member 300 includes a driving part and a transmission part, the driving part is connected to the moving member 200 through the transmission part, and the driving part is used to drive the moving member 200 to move between the second position and the first position through the transmission part.

[0085] Label 3. A throwing device according to label 1, wherein:

[0086] The moving member 200 is movably connected to the main body 100;

[0087] Alternatively, the throwing device further includes at least one first sliding portion 510 and at least one second sliding portion 520, the first sliding portion 510 is disposed on one of the main body 100 and the moving member 200, the second sliding portion 520 is disposed on the other of the main body 100 and the moving member 200, and the main body 100 and the moving member 200 are slidably connected through the interaction between the first sliding portion 510 and the second sliding portion 520;

[0088] Alternatively, the moving member 200 is rotatably connected to the main body 100 .

[0089] Reference numeral 4, according to the throwing device of reference numeral 3, wherein the main body 100 and the moving member 200 are slidably connected in an embodiment:

[0090] The first sliding portion 510 includes a sliding groove, and the second sliding portion 520 includes a sliding head;

[0091] Alternatively, the first sliding portion 510 includes a sliding rod, and the second sliding portion 520 includes a sliding hole;

[0092] The throwing device further includes at least one sleeve 530, which is connected to one of the main body 100 and the moving member 200, and the sleeve 530 is inserted into the sliding hole, and the sliding rod is slidably inserted into the sleeve 530;

[0093] The throwing device further includes a sleeve connecting plate 540 , the sleeve 530 is connected to the sleeve connecting plate 540 , and the sleeve connecting plate 540 is connected to one of the main body 100 and the moving member 200 .

[0094] Reference numeral 5. The throwing device according to reference numeral 1, wherein the throwing device further comprises:

[0095] A first acting member 400, the first acting member 400 is connected to the moving member 200, and the first acting member 400 is used to apply an external force to move the moving member 200 from the first position to the second position;

[0096] The first acting member 400 includes at least one of an adsorption member, an adsorption surface, a magnetic member, a clamping member, and an elastic hanging member.

[0097] Reference numeral 6. A throwing device according to reference numeral 5, wherein:

[0098] The first acting member 400 includes a magnetic member 410 and a protective cover 420 . The protective cover 420 surrounds the outer circumference of at least a portion of the magnetic member 410 . At least one of the magnetic member 410 and the protective cover 420 is connected to the moving member 200 .

[0099] Reference numeral 7. A throwing device according to reference numeral 1, wherein:

[0100] The main body 100 further includes a baffle, which is at least used to limit the moving direction of the waste 50;

[0101] The enclosure includes a first enclosure 131, the first enclosure 131 is connected to the main body 100 or the moving member 200, the first enclosure 131 corresponds to at least a portion of the edge of the supporting area 101, the first enclosure 131 and the supporting area 101 form a preset angle, and the first enclosure 131 is parallel to the moving direction of the moving member 200, and the preset angle is not less than 90 degrees;

[0102] And / or, the enclosure includes a second enclosure 132, and the second enclosure 132 is connected to the main body 100 to limit the moving direction of the moving member 200;

[0103] And / or, the enclosure includes a second enclosure 132, the second enclosure 132 is connected to the main body 100, the main body 100 also includes an extension area 102 different from the supporting area 101, the second enclosure 132 is located between the supporting area 101 and the extension area 102, and the second enclosure 132 is used to prevent waste 50 from entering the extension area 102.

[0104] Reference numeral 8. A throwing device according to reference numeral 1, wherein:

[0105] The main body 100 includes a vertical plate 110 and a receiving plate 120, the vertical plate 110 and the receiving plate 120 are connected, and the vertical plate 110 and the receiving plate 120 form a preset angle, and the receiving plate 120 includes a supporting area 101;

[0106] The moving member 200 includes a moving plate 210 and a pushing plate 220 . The moving plate 210 and the pushing plate 220 are connected. The moving plate 210 is arranged opposite to the vertical plate 110 . The pushing plate 220 is used to push the waste material 50 .

[0107] Reference numeral 9. A throwing device according to reference numeral 8, wherein:

[0108] The vertical plate 110 is used to limit the limit position of the moving member 200 moving from the second position to the first position by abutting against the moving plate 210;

[0109] The throwing device further includes: a buffer 600, the buffer 600 is connected to at least one of the vertical plate 110 and the movable plate 210, and the buffer 600 is used to buffer the impact between the vertical plate 110 and the movable plate 210;

[0110] And / or, the movable plate 210 is bent toward one side of the vertical plate 110 to form a bending area, and the edge of the bending area is used to abut against the vertical plate 110 to limit the extreme position of the movable member 200 moving from the second position to the first position.

[0111] Reference numeral 10. A throwing device according to reference numeral 8, wherein:

[0112] The moving direction of the moving member 200 from the second position to the first position is a preset direction, and the supporting area and the vertical plate 110 are staggered in the preset direction so that the waste 50 can be pushed out through the edge of the supporting area.

[0113] Reference numeral 11. A throwing device according to reference numeral 7, wherein the throwing device further comprises:

[0114] Guide member 700;

[0115] The moving member 200 further includes a connecting rod 230, and the connecting rod 230 is connected to the moving plate 210 and the pushing plate 220 respectively;

[0116] The guide member 700 is connected to the main body 100 , and a sliding groove 710 or a sliding hole is provided on the guide member 700 , and the connecting rod 230 is slidably embedded in the sliding groove 710 , or the connecting rod 230 is slidably inserted in the sliding hole.

[0117] Reference numeral 12. A throwing device according to reference numeral 1, wherein the throwing device further comprises:

[0118] The scraper 800 includes a scraper end, and the scraper end is used to interact with the nozzle of the 3D printer to wipe the nozzle.

[0119] Label 13. A throwing device according to label 12, wherein:

[0120] At least a portion of the scraper 800 that interacts with the nozzle is made of a flexible material;

[0121] and / or, at least a portion of the area of ​​the scraper 800 that interacts with the nozzle is coated with an anti-stick coating;

[0122] And / or, a deformation hole 810 is provided on the scraper 800 , and at least a part of the scraper 800 that interacts with the nozzle is deformed through the deformation hole 810 .

[0123] Reference numeral 14. A throwing device according to reference numeral 11, wherein:

[0124] The scraper 800 is fixed relative to the main body 100;

[0125] Alternatively, the scraper 800 is connected to the moving member 200, and the scraper 800 wipes the nozzle when the moving member 200 moves from the second position to the first position.

[0126] Reference numeral 15. The throwing device according to reference numeral 1, wherein the throwing device further comprises:

[0127] A limiting member 900, wherein the relative position of the limiting member 900 and the main body 100 is fixed;

[0128] The limiting member 900 is used to limit the limit position of the moving member 200 moving from the first position to the second position.

[0129] Reference numeral 16. A throwing device according to reference numeral 1, wherein the throwing device further comprises:

[0130] The material box is used to receive the waste material 50 pushed out from the supporting area 101 .

[0131] Reference numeral 17, a throwing device according to reference numeral 1, characterized in that the position of the moving member 200 further includes a third position, and the third position is located between the first position and the second position;

[0132] When the moving member 200 is located at the third position, the supporting area 101 supports the waste

[0133] Label 18. A 3D printer, comprising a throwing device 10 as described in any one of the above labels 1-16.

[0134] Reference number 19. A 3D printer according to reference number 18, wherein the 3D printer further comprises:

[0135] The X-axis mechanism 20 and the print head 30, the throwing device 10 is connected to the X-axis mechanism 20, the print head 30 is movably connected to the X-axis mechanism 20, and the print head 30 includes a nozzle 31;

[0136] When the print head 30 ejects the waste material 50 , the nozzle 31 corresponds to the receiving area 101 .

[0137] Reference number 20. A 3D printer according to reference number 19, wherein:

[0138] The 3D printer further includes a second action member 40, which is connected to the print head 30:

[0139] The second acting member 40 is used to act with the first acting member 400 of the ejection device so that the print head 30 drives the movable member 200 to move. When the movable member 200 is located at the second position, the second acting member 40 is separated from the first acting member 400, and the movable member 200 moves to the first position to push the waste material 50.

[0140] Reference number 21. A 3D printer according to reference number 20, wherein:

[0141] The second acting member 40 includes at least one of an adsorption member, an adsorption surface, a magnetic member, a clamping member, and an elastic hanging member.

[0142] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A throwing device, characterized in that: include: A main body, the main body comprising a supporting area, the supporting area being used to receive waste; A moving member, wherein the position of the moving member includes a first position and a second position; A force-applying member, the force-applying member is at least connected to the moving member, and the force-applying member is used to drive the moving member to move at least from the second position to the first position to push the waste on the supporting area.

2. The throwing device according to claim 1, characterized in that: The force applying member is also connected to the main body; And / or, the force applying member includes an elastic member, and when the moving member moves from the first position to the second position, the elastic member stores energy, and when the moving member moves from the second position to the first position, the elastic member releases energy; And / or, the force-applying member is connected to at least one of the main body and the moving member by means of a snap connection, a hook connection, a sleeve connection, a bolt connection, a plug connection or an embedded connection; And / or, the force applying member includes a driving part and a transmission part, the driving part is connected to the moving member through the transmission part, and the driving part is used to drive the moving member to move between the second position and the first position through the transmission part.

3. The throwing device according to claim 1, characterized in that: The moving member is movably connected to the main body; Alternatively, the throwing device further comprises at least one first sliding part and at least one second sliding part, the first sliding part is arranged on one of the main body and the moving member, the second sliding part is arranged on the other of the main body and the moving member, and the main body and the moving member are slidably connected through the interaction between the first sliding part and the second sliding part; Alternatively, the moving member is rotatably connected to the main body.

4. The throwing device according to claim 3, characterized in that: In an embodiment in which the main body and the moving member are slidably connected: The first sliding part includes a sliding groove, and the second sliding part includes a sliding head; Alternatively, the first sliding portion includes a sliding rod, and the second sliding portion includes a sliding hole; The throwing device further comprises at least one shaft sleeve, the shaft sleeve is connected to one of the main body and the moving member, the shaft sleeve is inserted into the sliding hole, and the sliding rod is slidably inserted into the shaft sleeve; The throwing device also includes a shaft sleeve connecting plate, the shaft sleeve is connected to the shaft sleeve connecting plate, and the shaft sleeve connecting plate is connected to one of the main body and the moving part.

5. The throwing device according to claim 1, characterized in that: The throwing device also includes: a first acting member, the first acting member being connected to the moving member, and the first acting member being used to apply an external force to move the moving member from the first position to the second position; The first acting member includes at least one of an adsorption member, an adsorption surface, a magnetic member, a clamping member, and an elastic hanging member.

6. The throwing device according to claim 5, characterized in that: The first acting member includes a magnetic member and a protective cover, wherein the protective cover surrounds the outer circumference of at least a part of the magnetic member, and at least one of the magnetic member and the protective cover is connected to the moving member.

7. The throwing device according to claim 1, characterized in that: The main body further comprises a baffle, which is at least used to limit the moving direction of the waste; The enclosure includes a first enclosure, the first enclosure is connected to the main body or the moving member, the first enclosure corresponds to at least a portion of the edge of the supporting area, the first enclosure and the supporting area form a preset angle, and the first enclosure is parallel to the moving direction of the moving member, and the preset angle is not less than 90 degrees; And / or, the enclosure includes a second enclosure, and the second enclosure is connected to the main body to limit the moving direction of the moving member; And / or, the enclosure includes a second enclosure, the second enclosure is connected to the main body, the main body also includes an extension area different from the supporting area, the second enclosure is located between the supporting area and the extension area, and the second enclosure is used to prevent the waste from entering the extension area.

8. The throwing device according to claim 1, characterized in that: The main body includes a vertical plate and a receiving plate, the vertical plate is connected to the receiving plate, and the receiving plate includes the supporting area; The moving member comprises a moving plate and a pushing plate, the moving plate and the pushing plate are connected, the moving plate is arranged opposite to the vertical plate, and the pushing plate is used to push the waste.

9. The throwing device according to claim 8, characterized in that: The vertical plate is used to limit the limit position of the moving member moving from the second position to the first position by abutting against the moving plate; The throwing device further includes: a buffer, the buffer is connected to at least one of the vertical plate and the movable plate, and the buffer is used to buffer the impact between the vertical plate and the movable plate; And / or, the movable plate is bent toward one side of the vertical plate to form a bending area, and an edge of the bending area is used to abut against the vertical plate to limit the extreme position of the movable member moving from the second position to the first position.

10. The throwing device according to claim 8, characterized in that: The moving direction of the moving member from the second position to the first position is a preset direction, and the supporting area and the vertical plate are staggered in the preset direction so that the waste is pushed out through the edge of the supporting area.

11. The throwing device according to claim 8, characterized in that: The throwing device also includes: Guides; The moving member further comprises a connecting rod, and the connecting rod is respectively connected to the moving plate and the pushing plate; The guide member is connected to the main body, and a slide groove or a slide hole is provided on the guide member. The connecting rod is slidably embedded in the slide groove, or the connecting rod is slidably inserted in the slide hole.

12. The throwing device according to claim 1, characterized in that: The throwing device also includes: A scraper member includes a scraper end, and the scraper end is used to act with the nozzle of the 3D printer to wipe the nozzle.

13. The throwing device according to claim 12, characterized in that: At least a portion of the scraper that interacts with the nozzle is made of a flexible material; and / or, at least a portion of the area of ​​the scraper member that interacts with the nozzle is coated with an anti-stick coating; And / or, a deformation hole is provided on the scraper member, and at least a part of the scraper member that interacts with the nozzle is deformed through the deformation hole.

14. The throwing device according to claim 12, characterized in that: The scraper is fixed relative to the main body; Alternatively, the scraper is connected to the moving member, and the scraper wipes the nozzle when the moving member moves from the second position to the first position.

15. The throwing device according to claim 1, characterized in that: The throwing device also includes: A limiting member, wherein the relative position of the limiting member and the main body is fixed; The limiting member is used to limit the limit position of the moving member moving from the first position to the second position.

16. The throwing device according to claim 1, characterized in that: The throwing device also includes: A material box is used to receive the waste material pushed out from the supporting area.

17. The throwing device according to claim 1, characterized in that: The position of the moving member further includes a third position, and the third position is located between the first position and the second position; When the moving member is located at the third position, the supporting area supports waste.

18. A 3D printer, characterized in that: The method comprises the throwing device as claimed in any one of claims 1 to 17.

19. The 3D printer according to claim 18, characterized in that: The 3D printer also includes: An X-axis mechanism and a print head, wherein the throwing device is connected to the X-axis mechanism, the print head is movably connected to the X-axis mechanism, and the print head includes a nozzle; When the print head ejects the waste material, the nozzle corresponds to the supporting area.

20. The 3D printer according to claim 19, characterized in that: The 3D printer further comprises a second actuating member, wherein the second actuating member is connected to the print head: The second acting member is used to act with the first acting member of the ejection device so that the print head drives the movable member to move. When the movable member is located at the second position, the second acting member is disengaged from the first acting member, and the movable member moves toward the first position to push the waste material.

21. The 3D printer according to claim 20, characterized in that: The second action member includes at least one of an adsorption member, an adsorption surface, a magnetic member, a clamping member, and an elastic hanging member.

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