Waste material wiping device for 3D printer and 3D printer

Abstract

The utility model relates to the technical field of 3D printing, in particular to a waste wiping device for a 3D printer and the 3D printer, and the waste wiping device comprises a base, a sliding seat, a wiping seat, a transmission mechanism and an elastic part, the sliding seat and the wiping seat are slidably arranged on the base, the transmission mechanism is arranged between the sliding seat and the wiping seat, and the elastic part is arranged between the base and the sliding seat; the sliding seat comprises an abutting part matched with a printing head of the 3D printer in an abutting mode and a sliding part matched with the base in a sliding mode, a groove used for allowing waste materials to fall into is formed in the material wiping seat, the groove is provided with a one-way opening, one end of the transmission mechanism is connected to the sliding seat, and the other end of the transmission mechanism is connected to the material wiping seat. By the adoption of the technical scheme, through cooperation of the sliding base, the wiping base and the transmission mechanism, waste is effectively collected and discharged, meanwhile, the situation that the waste is directly ejected to the surface of a printing head which is being withdrawn is avoided, and the waste collecting device is simple and compact in structure, high in practicability and good in market popularization prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing technical field, concretely relates to a waste material wiping device for 3D printer and 3D printer. BACKGROUND

[0002] 3D printer is a kind of printing equipment based on digital model file, with powder-like metal or plastic and other adhesive materials as printing material, and is formed by layer-by-layer printing. In order to avoid mixing or mixing color during formal printing, the previous printing material needs to be discharged before changing material, and the discharged consumables is called waste material.

[0003] In order to solve the problem of waste material cleaning, the related technology usually sets a wiping device or a wiping device in the 3D printer to clean the waste material extruded by the printing head of the 3D printer. For example, the prior art discloses a waste material wiping mechanism for 3D printer, which realizes waste material collection and discharge through the cooperation of base waste material groove, sliding member and spring (see CN216230793U). However, the waste material wiping mechanism of this design conflicts with the moving path of the printing head in the direction of waste material pushing. Specifically, the opening direction of the second end of the waste material groove is consistent with the direction of the printing head moving back, when the printing head completes "wiping mouth" and moves reversely, the push rod part pushes the waste material to the second end of the waste material groove, at this time, the waste material may be directly ejected to the surface of the printing head being withdrawn, resulting in waste material adhering or blocking the discharge nozzle, and even polluting the subsequent printing operation. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problem that the waste material pushing direction of the wiping device / wiping mouth device is consistent with the direction of the printing head moving back in the prior art, which may cause the waste material to be directly ejected to the surface of the printing head being withdrawn, resulting in waste material adhering or blocking the discharge nozzle, and even polluting the subsequent printing operation. The utility model provides a waste material wiping device for 3D printer and 3D printer.

[0005] The technical scheme adopted by the waste material wiping device for 3D printer provided in the present application is as follows: a waste material wiping device for 3D printer, comprising a base, a sliding seat and a wiping seat slidingly arranged on the base, a transmission mechanism arranged between the sliding seat and the wiping seat, and an elastic member arranged between the base and the sliding seat.

[0006] The sliding seat comprises an abutting portion abutting with the printing head of the 3D printer and a sliding portion slidingly cooperating with the base, the wiping seat is provided with a groove for the waste material to fall into, the groove has a one-way opening, one end of the transmission mechanism is connected to the sliding seat, and the other end is connected to the wiping seat.

[0007] When the printing head of the 3D printer presses the abutting part and pushes the sliding seat to move in the first direction, the elastic member is compressed, the transmission mechanism drives the wiping seat to move in the second direction opposite to the first direction, so that the waste material extruded by the printing head enters the groove; when the printing head is separated from the abutting part, the elastic member drives the sliding seat to reverse and move reversely through the transmission mechanism, so that the waste material is ejected from the one-way opening of the groove.

[0008] Optionally, the transmission mechanism comprises a transmission plate rotatably arranged on the base and a plurality of first tooth grooves and second tooth grooves respectively arranged at two ends of the transmission plate, the plurality of first tooth grooves and second tooth grooves are respectively distributed on the two ends of the transmission plate in a circumferential direction, and the sliding part and the wiping seat are respectively provided with a first rack and a second rack engaged with the first tooth grooves and the second tooth grooves.

[0009] Optionally, the two ends of the transmission plate are a first end and a second end, the plurality of first tooth grooves and second tooth grooves are respectively arranged on the first end and the second end, and the size of the first end is smaller than the size of the second end.

[0010] Optionally, the base is provided with a receiving cavity for accommodating the transmission plate, and the first end of the transmission plate is provided with a mounting hole for fixing the transmission plate in the receiving cavity and enabling the transmission plate to rotate relative to the receiving cavity.

[0011] Optionally, the base is provided with a first sliding groove and a second sliding groove, the sliding part and the wiping seat of the sliding seat are respectively slidably matched with the first sliding groove and the second sliding groove, and the first sliding groove and the second sliding groove are parallel to each other.

[0012] Optionally, the base is provided with an upper cover, the upper cover covers the top surface of the base, the receiving cavity and the first sliding groove are closed by the upper cover, the upper cover is provided with a strip-shaped groove for the abutting part to extend out, and the abutting part moves along the length direction of the strip-shaped groove under the pushing of the printing head of the 3D printer.

[0013] Optionally, the sliding seat further comprises a connecting part, the abutting part is fixedly connected to the sliding part through the connecting part, and the connecting part is slidably matched with the strip-shaped groove.

[0014] Optionally, the elastic member comprises a reset spring arranged in the first sliding groove, the reset spring is arranged along the length direction of the first sliding groove, and the two ends of the reset spring are respectively abutted against the side walls of the end parts of the first sliding groove and the sliding seat.

[0015] Optionally, the wiping seat is provided with a wiping silica gel pad for wiping the discharge port of the printing head of the 3D printer.

[0016] The application also provides a 3D printer, comprising a printer body, a printing head and the waste material wiping device.

[0017] As can be seen from the above, the waste material wiping device for the 3D printer comprises a base, a sliding seat slidingly arranged on the base, a transmission mechanism arranged between the sliding seat and a wiping seat, and an elastic member arranged between the base and the sliding seat. Through the cooperation between the sliding seat, the wiping seat and the transmission mechanism, the waste material is effectively collected and discharged, and the waste material is prevented from being directly ejected onto the surface of the printing head being withdrawn. The device has a simple and compact structure, high practicability and a good market prospect. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0019] Figure 1 is a schematic diagram of the overall structure of the embodiment;

[0020] Figure 2 is a display diagram of the embodiment after removing the upper cover;

[0021] Figure 3 is a schematic diagram of the cooperation relationship between the sliding seat, the wiping seat and the transmission mechanism in the embodiment;

[0022] Figure 4 is an exploded view of the embodiment.

[0023] Marked: 10, base; 11, accommodating cavity; 12, first sliding groove; 13, second sliding groove; 14, upper cover; 141, strip-shaped groove; 20, sliding seat; 21, abutting portion; 22, sliding portion; 221, first gear rack; 23, connecting portion; 30, wiping seat; 301, second gear rack; 31, groove; 32, wiping silica gel pad; 40, transmission mechanism; 41, transmission plate; 411, first end; 4111, mounting hole; 412, second end; 42, first gear slot; 43, second gear slot; 50, elastic member. DETAILED DESCRIPTION

[0024] The following will combine the drawings of the embodiments of the present application to Figures 1-4The technical solutions in the embodiments of the present application are clearly and completely described, and obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] 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 positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0026] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0027] The present embodiment provides a waste wiping device for a 3D printer, referring to Figures 1-2 , comprising a base 10, a sliding seat 20 and a wiping seat 30 slidingly arranged on the base 10, a transmission mechanism 40 arranged between the sliding seat 20 and the wiping seat 30, and an elastic member 50 arranged between the base 10 and the sliding seat 20.

[0028] The sliding seat 20 comprises an abutting part 21 abutting with the printing head of the 3D printer and a sliding part 22 sliding with the base 10. The wiping seat 30 is provided with a groove 31 for the waste material to fall into, and the groove 31 has a one-way opening. One end of the transmission mechanism 40 is connected to the sliding seat 20, and the other end is connected to the wiping seat 30. When the printing head of the 3D printer extrudes the abutting part 21 and pushes the sliding seat 20 to move in the first direction, the elastic member 50 is compressed, the transmission mechanism 40 drives the wiping seat 30 to move in the second direction opposite to the first direction, so that the waste material extruded by the printing head enters the groove 31; when the printing head is separated from the abutting part 21, the elastic member 50 drives the sliding seat 20 to reverse and move, and the wiping seat 30 is driven by the transmission mechanism 40 to move reversely, so that the waste material is ejected from the one-way opening of the groove 31.

[0029] The first direction and the second direction are parallel to each other and opposite in direction (indicated in the figure). When the printing head of the 3D printer moves to the waste material wiping device to extrude the abutting part 21 and push the abutting part 21 to move in the first direction, the sliding seat 20 is driven to slide in the first direction relative to the base 10, the transmission mechanism 40 is driven to act and compress the elastic member 50, and the wiping seat 30 is driven by the transmission mechanism 40 to move in the second direction. At this time, the waste material extruded by the printing head of the 3D printer falls into the groove 31. When the printing head is separated from the abutting part 21, the elastic member 50 is reset and drives the sliding seat 20 to reverse and move, and the wiping seat 30 is driven by the transmission mechanism 40 to move reversely, so that the waste material is ejected from the one-way opening of the groove 31. At this time, the direction of ejection of the waste material does not conflict with the moving path of the printing head, so as to avoid the situation that the waste material is directly ejected to the surface of the printing head due to the conflict between the waste material and the moving path of the printing head.

[0030] Further, referring to Figure 2 and Figure 3 , the transmission mechanism 40 comprises a transmission plate 41 rotatably arranged on the base 10 and a first tooth groove 42 and a second tooth groove 43 arranged at two ends of the transmission plate 41 respectively. A plurality of first tooth grooves 42 and second tooth grooves 43 are circumferentially distributed at two ends of the transmission plate 41 respectively, and the sliding part 22 and the wiping seat 30 are respectively provided with a first rack 221 and a second rack 301 engaged with the first tooth groove 42 and the second tooth groove 43.

[0031] The linkage of the sliding seat 20 and the wiping seat 30 is achieved by the rotation of the transmission plate 41. Specifically, when the print head of the 3D printer presses the abutting portion 21 and pushes the sliding seat 20 to move in a first direction, the first rack 221 on the sliding seat 20 engages with the first tooth groove 42 on the transmission plate 41, thereby driving the transmission plate 41 to rotate. The rotation of the transmission plate 41 further drives the second rack 301 on the wiping seat 30 to engage with the second tooth groove 43, thereby driving the wiping seat 30 to move in a second direction opposite to the first direction, so as to guide the waste material extruded by the print head into the groove 31. When the print head is separated from the abutting portion 21, the elastic member 50 drives the sliding seat 20 to reverse and reset, and the resetting of the sliding seat 20 reversely drives the transmission plate 41 to rotate through the engagement of the first rack 221 and the first tooth groove 42. The reverse rotation of the transmission plate 41 further reversely drives the wiping seat 30 to move through the engagement of the second tooth groove 43 and the second rack 301, thereby driving the waste material to pop out from the one-way opening of the groove 31.

[0032] Further, the transmission mechanism 40 comprises a transmission plate 41 rotatably arranged on the base 10, and a first tooth groove 42 and a second tooth groove 43 arranged at two ends of the transmission plate 41, respectively. A plurality of first tooth grooves 42 and second tooth grooves 43 are circumferentially distributed at the two ends of the transmission plate 41, and the sliding portion 22 and the wiping seat 30 are respectively provided with a first rack 221 and a second rack 301 engaging with the first tooth groove 42 and the second tooth groove 43.

[0033] The linkage of the sliding seat 20 and the wiping seat 30 is achieved by the rotation of the transmission plate 41. Specifically, when the print head of the 3D printer presses the abutting portion 21 and pushes the sliding seat 20 to move in a first direction, the first rack 221 on the sliding seat 20 engages with the first tooth groove 42 on the transmission plate 41, thereby driving the transmission plate 41 to rotate. The rotation of the transmission plate 41 further drives the second rack 301 on the wiping seat 30 to engage with the second tooth groove 43, thereby driving the wiping seat 30 to move in a second direction opposite to the first direction, so as to guide the waste material extruded by the print head into the groove 31. When the print head is separated from the abutting portion 21, the elastic member 50 drives the sliding seat 20 to reverse and reset, and the resetting of the sliding seat 20 reversely drives the transmission plate 41 to rotate through the engagement of the first rack 221 and the first tooth groove 42. The reverse rotation of the transmission plate 41 further reversely drives the wiping seat 30 to move through the engagement of the second tooth groove 43 and the second rack 301, thereby driving the waste material to pop out from the one-way opening of the groove 31.

[0034] Further, the two ends of the transmission plate 41 are a first end 411 and a second end 412, respectively, and a plurality of first tooth grooves 42 and second tooth grooves 43 are arranged on the first end 411 and the second end 412, respectively. The size of the first end 411 is smaller than the size of the second end 412.

[0035] By setting the first gear slot 42 and the second gear slot 43 on the first end 411 and the second end 412 of the transmission plate 41, and the size of the first end 411 is smaller than the size of the second end 412, the first end 411 can drive the second end 412 to rotate a larger angle with a smaller rotation angle, so that the movement distance of the wiping seat 30 is greater than the movement distance of the sliding seat 20, thereby facilitating the collection and ejection of the waste material extruded by the print head.

[0036] In addition, in some preferred embodiments, the size and density of the first gear slot 42 and the second gear slot 43 can be adjusted according to actual conditions, so as to change the gear ratio of the first gear slot 42 and the second gear slot 43 and increase the moving stroke of the wiping seat 30.

[0037] Further, the base 10 is provided with a receiving cavity 11 for accommodating the transmission plate 41, and the first end 411 of the transmission plate 41 is provided with a mounting hole 4111 for cooperating with a bolt, so that the transmission plate 41 can rotate around the bolt.

[0038] By setting the receiving cavity 11 on the base 10 and the mounting hole 4111 on the first end 411 of the transmission plate 41, the mounting hole 4111 is used to fix the transmission plate 41 in the receiving cavity 11, and the transmission plate 41 can rotate relative to the receiving cavity 11.

[0039] Further, referring to Figure 2 and Figure 3 , the base 10 is provided with a first sliding groove 12 and a second sliding groove 13, and the sliding part 22 of the sliding seat 20 and the wiping seat 30 are respectively slidably connected with the first sliding groove 12 and the second sliding groove 13, and the first sliding groove 12 and the second sliding groove 13 are parallel to each other.

[0040] By setting the first sliding groove 12 and the second sliding groove 13, the sliding part 22 of the sliding seat 20 and the wiping seat 30 can stably and smoothly slide on the base 10, and the first gear and the second gear on the first end 411 and the second end 412 of the transmission plate 41 can contact and engage with the first gear rack 221 and the second gear rack 301, thereby ensuring the reliability and stability of the entire transmission mechanism 40.

[0041] Further, the base 10 is provided with an upper cover 14, the upper cover 14 covers the top surface of the base 10, the receiving cavity 11 and the first sliding groove 12 are closed by the upper cover 14, the upper cover 14 is provided with a strip-shaped groove 141 for the abutting part 21 to extend out, and the abutting part 21 moves along the length direction of the strip-shaped groove 141 under the pushing of the print head of the 3D printer.

[0042] The upper cover 14 can effectively seal the top surface of the base 10, thereby avoiding foreign matter from entering the containing cavity 11 and the first sliding groove 12, and ensuring the normal operation of the transmission plate 41 and the sliding seat 20. The strip-shaped groove 141 allows the abutting portion 21 to move along the length direction of the strip-shaped groove 141 under the pushing of the print head, thereby realizing smooth cooperation between the print head and the abutting portion 21.

[0043] Further, the sliding seat 20 further comprises a connecting portion 23, and the abutting portion 21 is fixedly connected to the sliding portion 22 through the connecting portion 23, and the connecting portion 23 is in sliding cooperation with the strip-shaped groove 141.

[0044] The connecting portion 23 of the sliding seat 20 is in sliding cooperation with the strip-shaped groove 141, so that the abutting portion 21 can move along the length direction of the strip-shaped groove 141 under the pushing of the print head of the 3D printer. The design of the connecting portion 23 helps to improve the cooperation precision between the sliding seat 20 and the print head, thereby ensuring that the print head can smoothly push the sliding seat 20 to move in the first direction when extruding the abutting portion 21. Meanwhile, the sliding cooperation between the connecting portion 23 and the strip-shaped groove 141 also helps to improve the stability of the wiping device, thereby avoiding deviation or jamming of the sliding seat 20 during movement.

[0045] In the embodiment, the abutting portion 21, the connecting portion 23 and the sliding portion 22 are integrally formed through bolt connection cooperation to form a whole sliding seat 20. In other embodiments, the abutting portion 21, the connecting portion 23 and the sliding portion 22 can also be integrally formed.

[0046] Further, referring to Figure 2 and Figure 4 , the elastic member 50 comprises a reset spring arranged in the first sliding groove 12, and the reset spring is arranged along the length direction of the first sliding groove 12, and the two ends of the reset spring are respectively abutted against the side wall of the end portion of the first sliding groove 12 and the sliding seat 20.

[0047] The reset spring is arranged in the first sliding groove 12 and arranged along the length direction of the first sliding groove 12, and the reset function of the reset spring realizes the reset of the sliding seat 20. The two ends of the reset spring are respectively abutted against the side wall of the end portion of the first sliding groove 12 and the sliding seat 20, so that the sliding seat 20 can be quickly reset in the reverse direction when the print head is separated from the abutting portion 21, and the wiping nozzle seat is reversely moved through the transmission mechanism 40, thereby ejecting the waste from the one-way opening of the groove 31.

[0048] Further, the wiping nozzle seat is provided with a wiping silica gel pad 32 for wiping the discharge port of the print head of the 3D printer.

[0049] The arrangement of the wiping silica gel pad 32 can effectively wipe and clean the print head during the waste cleaning process of the print head, thereby ensuring that the print head remains clean during the material replacement process, and avoiding the adverse effects of waste residues on subsequent printing operations.

[0050] The embodiment also provides a 3D printer, which comprises a printer body, a printing head and the waste material wiping device.

[0051] The working principle of the utility model is roughly as follows: when the printing head of the 3D printer abuts against the abutting portion 21 of the sliding seat 20 and pushes the abutting portion 21 to move in the first direction, the sliding portion 22 is driven to move in the first direction, the transmission plate 41 is driven to rotate and the reset spring is compressed, the transmission plate 41 drives the wiping seat 30 to move in the second direction, the waste material extruded by the printing head of the 3D printer falls into the groove 31 on the wiping seat 30, when the printing head is separated from the abutting portion 21, the reset spring resets and drives the sliding seat 20 to reset reversely, the wiping seat 30 is reversely moved through the transmission plate 41, so that the waste material is bounced out of the one-way opening of the groove 31.

[0052] The above is only used to illustrate the technical scheme of the utility model and is not limited, other modifications or equivalent replacements of the technical scheme of the utility model made by the ordinary skilled in the art should be covered in the claim range of the utility model as long as they do not deviate from the spirit and range of the technical scheme of the utility model.

Claims

1. A waste wiping device for a 3D printer, characterized in that, The base (10), the sliding seat (20) and the wiping seat (30) are arranged on the base (10), the transmission mechanism (40) is arranged between the sliding seat (20) and the wiping seat (30), and the elastic member (50) is arranged between the base (10) and the sliding seat (20); The sliding seat (20) comprises an abutting part (21) abutting with the printing head of the 3D printer and a sliding part (22) sliding with the base (10), the wiping seat (30) is provided with a groove (31) for falling waste, the groove (31) has a one-way opening, one end of the transmission mechanism (40) is connected to the sliding seat (20), and the other end is connected to the wiping seat (30); When the printing head of the 3D printer extrudes the abutting part (21) and pushes the sliding seat (20) to move in the first direction, the elastic member (50) is compressed, the transmission mechanism (40) drives the wiping seat (30) to move in the second direction opposite to the first direction, so that the waste extruded by the printing head enters the groove (31); when the printing head is separated from the abutting part (21), the elastic member (50) drives the sliding seat (20) to reverse and reset, and drives the wiping seat (30) to move reversely through the transmission mechanism (40), so that the waste is bounced out of the one-way opening of the groove (31).

2. The waste wiping device for a 3D printer according to claim 1, wherein, The transmission mechanism (40) comprises a transmission plate (41) rotating on the base (10) and a plurality of first tooth grooves (42) and second tooth grooves (43) respectively arranged at two ends of the transmission plate (41), the plurality of first tooth grooves (42) and second tooth grooves (43) are respectively distributed on the two ends of the transmission plate (41), and the sliding part (22) and the wiping seat (30) are respectively provided with first tooth racks (221) and second tooth racks (301) engaged with the first tooth grooves (42) and the second tooth grooves (43).

3. The waste wiping device for a 3D printer according to claim 2, characterized in that, The two ends of the transmission plate (41) are respectively a first end (411) and a second end (412), the plurality of first tooth grooves (42) and second tooth grooves (43) are respectively arranged on the first end (411) and the second end (412), and the size of the first end (411) is smaller than the size of the second end (412).

4. The waste wiping device for a 3D printer according to claim 3, characterized in that, The base (10) is provided with a containing cavity (11) for containing the transmission plate (41), the first end (411) of the transmission plate (41) is provided with a mounting hole (4111), the mounting hole (4111) is used for fixing the transmission plate (41) in the containing cavity (11), and the transmission plate (41) can rotate relative to the containing cavity (11).

5. The waste wiping device for a 3D printer according to claim 4, wherein, The base (10) is provided with a first sliding groove (12) and a second sliding groove (13), the sliding part (22) of the sliding seat (20) and the wiping seat (30) are respectively slidingly matched with the first sliding groove (12) and the second sliding groove (13), and the first sliding groove (12) and the second sliding groove (13) are parallel to each other.

6. The waste wiping device for a 3D printer according to claim 5, wherein, The base (10) is provided with an upper cover (14) which covers the top surface of the base (10), the accommodating cavity (11) and the first sliding slot (12) are both closed by the upper cover (14), the upper cover (14) is provided with a strip-shaped slot (141) for the abutting portion (21) to extend out, and the abutting portion (21) moves along the length direction of the strip-shaped slot (141) under the pushing of the printing head of the 3D printer.

7. The waste wiping device for a 3D printer according to claim 6, wherein, The sliding seat (20) further comprises a connecting portion (23), the abutting portion (21) is fixedly connected to the sliding portion (22) through the connecting portion (23), and the connecting portion (23) is in sliding cooperation with the strip-shaped slot (141).

8. The waste wiping device for a 3D printer according to claim 5, wherein, The elastic member (50) comprises a reset spring arranged in the first sliding slot (12), the reset spring is arranged along the length direction of the first sliding slot (12), and the two ends of the reset spring abut against the side wall of the end portion of the first sliding slot (12) and the sliding seat (20) respectively.

9. The waste wiping device for a 3D printer according to claim 1, wherein, The wiping seat (30) is provided with a wiping silica gel pad (32) for wiping the discharge port of the printing head of the 3D printer.

10. A 3D printer characterized by, The waste wiping device comprises a printer body, a printing head and the waste wiping device according to any one of claims 1-9.

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