阅读说明：本技术 一种新型3d打印机 (Novel 3D printer ) 是由 孙永明 王红卫 郭华 徐德伟 麦淑珍 刘嘉杰 张磊 于 2020-04-26 设计创作，主要内容包括：本发明公开了一种新型3D打印机,该新型3D打印机的密封性效果好,在需要对3D打印机内的密封腔进行清理时,无需打开3D打印机的密封门,直接通过人工手动利用密封手套对密封腔的内部进行清理,使得密封腔不与外界连通,使得外界的环境不会污染密封腔,另外,刮刀的连接杆与密封带连接,使得刮刀与密封带同步在滑槽内移动,而密封带能够密封滑槽,使得密封腔内的打印粉不容易从密封腔内泄漏出去,从而能够有效保证产品的打印质量,大大提升了用户的体验。(The invention discloses a novel 3D printer, which has a good sealing effect, when a sealing cavity in the 3D printer needs to be cleaned, a sealing door of the 3D printer does not need to be opened, the inside of the sealing cavity is directly cleaned by manually using sealing gloves manually, so that the sealing cavity is not communicated with the outside, the external environment cannot pollute the sealing cavity, in addition, a connecting rod of a scraper is connected with a sealing strip, the scraper and the sealing strip synchronously move in a sliding groove, the sliding groove can be sealed by the sealing strip, printing powder in the sealing cavity is not easy to leak out of the sealing cavity, the printing quality of a product can be effectively ensured, and the user experience is greatly improved.)

1. The utility model provides a novel 3D printer, its characterized in that, includes first mirror and the second mirror that shakes, its characterized in that still includes:

the air conditioner comprises a top plate, a bottom plate, a front side plate, a rear side plate, a left side plate and a right side plate, wherein a sealed cavity is formed in the top plate, the bottom plate, the front side plate, the rear side plate, the left side plate and the right side plate, an air outlet communicated with the sealed cavity is formed in the rear side plate, a sliding groove located above the air outlet is further formed in the rear side plate, and an opening is formed in;

the scraper is movably arranged in the sliding groove, a sealing belt is movably arranged in the sliding groove, and a connecting rod of the scraper is connected with the sealing belt so that the sealing belt and the scraper move synchronously;

the first supporting part and the second supporting part are arranged in the top plate at intervals, the first galvanometer is adjustably arranged at the top of the first supporting part, the second galvanometer is adjustably arranged at the top of the second supporting part, and the top plate is provided with a first through hole corresponding to the laser head of the first galvanometer and a second through hole corresponding to the laser head of the second galvanometer at intervals;

one end of the sealing door is rotatably arranged in one side face of the front side plate far away from the rear side plate;

the sealing door is provided with a first protruding part which faces away from the rear side plate and is sunken in the direction and corresponds to the opening, a first through hole, a second through hole and a third through hole are formed in the first protruding part respectively, first sealing gloves are arranged in the first through hole, second sealing gloves are arranged in the second through hole, and transparent glass is arranged in the third through hole.

2. The novel 3D printer according to claim 1, wherein a first through hole and a second through hole are respectively formed at two ends of the sliding chute for passing the sealing strip, and the length of the sealing strip is greater than that of the sliding chute.

3. The novel 3D printer according to claim 2, wherein the upper and lower inner walls of the sliding slot are respectively provided with a first receiving groove and a second receiving groove for receiving the sealing strip, and the width of the sealing strip is slightly larger than the width of the sliding slot.

4. The novel 3D printer according to claim 3, wherein the first through hole and the second through hole are respectively disposed on both sides of the first protrusion, the third through hole is disposed between the first through hole and the second through hole, the first through hole and the second through hole are circular, and the third through hole is rectangular.

5. The novel 3D printer of claim 4, wherein a first sealing ring is arranged in the first through hole, a second sealing ring is arranged in the second through hole, a third sealing ring is arranged in the third through hole, the first sealing ring and the second sealing ring are circular, and the third sealing ring is rectangular.

6. The novel 3D printer of claim 5, further comprising:

the protective cover corresponds to the shape of the sealing door and is arranged outside the sealing door, wherein the protective cover is provided with a second protruding part corresponding to the first protruding part, and the second protruding part is provided with a fourth through hole corresponding to the first through hole, a fifth through hole corresponding to the second through hole and a sixth through hole corresponding to the third through hole.

7. The novel 3D printer of claim 6, wherein a plurality of receiving holes are formed at intervals on the edge of the outer side surface of the sealing door, and a plurality of inserting columns inserted into the plurality of receiving holes are formed at intervals on the edge of the inner side surface of the protective cover.

8. The novel 3D printer according to claim 7, wherein the first supporting part comprises a first horizontal supporting plate arranged on the top plate, a first vertical supporting plate vertically arranged on the first horizontal supporting plate, a second vertical supporting plate arranged on the first vertical supporting plate in a lifting manner, and a second horizontal supporting plate connected with the second vertical supporting plate, wherein the first galvanometer is arranged on the second horizontal supporting plate;

the second supporting part comprises a third horizontal supporting plate arranged on the top plate, a third vertical supporting plate vertically arranged on the third horizontal supporting plate, a fourth vertical supporting plate arranged on the third vertical supporting plate in a lifting mode and a fourth horizontal supporting plate connected with the fourth vertical supporting plate, wherein the second vibrating mirror is arranged on the fourth horizontal supporting plate.

9. The novel 3D printer according to claim 8, wherein a first elongated hole is vertically formed in the middle of the first vertical support plate, the second vertical support plate is provided with a first protrusion received in the first elongated hole, wherein a first opening communicated with the first elongated hole is vertically formed in the top of the first vertical support plate, the first protrusion is provided with a first threaded hole corresponding to the first opening, and a first screw rod is rotatably arranged in the first opening and is in threaded connection with the first threaded hole of the first protrusion;

the middle part of third vertical support board is provided with the rectangular trompil of second along vertical direction, fourth vertical support board is equipped with accepts the second bulge in the rectangular trompil of second, wherein the top of third vertical support board along vertical direction be equipped with the second trompil of the rectangular trompil intercommunication of second, the second bulge be equipped with the second screw hole that the second trompil corresponds, just it is provided with the second lead screw to rotate in the second trompil, the second lead screw with the second screw hole threaded connection of second bulge.

10. The novel 3D printer of claim 9, wherein a first sliding rail and a second sliding rail are arranged on the top plate at intervals, the first horizontal supporting rod is provided with a first sliding block slidably arranged in the first sliding rail, and the second horizontal supporting rod is provided with a second sliding block slidably arranged in the second sliding rail.

Technical Field

The invention relates to the technical field of 3D printers, in particular to a novel 3D printer.

Background

With the development of 3D printing technology, the 3D printer can directly manufacture metal parts with metallurgical bonding, compact structure, good size precision and mechanical property, has wide application prospect, and becomes a research hotspot in the field of current additive manufacturing. The 3D printer has the advantages of personalized design, rapid molding and short manufacturing period, and is very suitable for manufacturing metal parts with small batch, personalization, complex surfaces and internal structures.

Generally, 3D printer on the market all prints the operation in its sealed intracavity, but, 3D printer on the market leakproofness is relatively poor, need open the sealing door and operate when needing to clear up the sealed chamber on the one hand, and this operation makes the sealed chamber receive external environment's pollution easily, and on the other hand is the printing powder in the sealed chamber leaks out in order to influence the normal use of device easily from the sealed intracavity to seriously influence the printing quality of product.

Disclosure of Invention

The technical problem mainly solved by the invention is to provide a novel 3D printer, which has a good sealing effect, when a sealing cavity in the 3D printer needs to be cleaned, a sealing door of the 3D printer does not need to be opened, the inside of the sealing cavity is directly cleaned by manually using a sealing glove, so that the external environment cannot pollute the sealing cavity, printing powder in the sealing cavity cannot easily leak out of the sealing cavity, the printing quality of a product can be effectively ensured, and the user experience is greatly improved.

In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a novel 3D printer, its characterized in that shakes the mirror including first mirror and the second, its characterized in that still includes: the air conditioner comprises a top plate, a bottom plate, a front side plate, a rear side plate, a left side plate and a right side plate, wherein a sealed cavity is formed in the top plate, the bottom plate, the front side plate, the rear side plate, the left side plate and the right side plate, an air outlet communicated with the sealed cavity is formed in the rear side plate, a sliding groove located above the air outlet is further formed in the rear side plate, and an opening is formed in; the scraper is movably arranged in the sliding groove, a sealing belt is movably arranged in the sliding groove, and a connecting rod of the scraper is connected with the sealing belt so that the sealing belt and the scraper move synchronously; the first supporting part and the second supporting part are arranged in the top plate at intervals, the first galvanometer is adjustably arranged at the top of the first supporting part, the second galvanometer is adjustably arranged at the top of the second supporting part, and the top plate is provided with a first through hole corresponding to the laser head of the first galvanometer and a second through hole corresponding to the laser head of the second galvanometer at intervals; one end of the sealing door is rotatably arranged in one side face of the front side plate far away from the rear side plate; the sealing door is provided with a first protruding part which faces away from the rear side plate and is sunken in the direction and corresponds to the opening, a first through hole, a second through hole and a third through hole are formed in the first protruding part respectively, first sealing gloves are arranged in the first through hole, second sealing gloves are arranged in the second through hole, and transparent glass is arranged in the third through hole.

Furthermore, a first through hole and a second through hole for penetrating the sealing strip are respectively formed in two ends of the sliding groove, and the length of the sealing strip is larger than that of the sliding groove.

Furthermore, the upper and lower inner walls of the sliding groove are respectively provided with a first accommodating groove and a second accommodating groove for accommodating the sealing strip, and the width of the sealing strip is slightly larger than that of the sliding groove.

Furthermore, the first through hole and the second through hole are respectively arranged on two sides of the first protruding portion, the third through hole is arranged between the first through hole and the second through hole, the first through hole and the second through hole are in a circular shape, and the third through hole is in a rectangular shape.

Furthermore, be equipped with first sealing washer in the first through-hole, be equipped with the second sealing washer in the second through-hole, be provided with the third sealing washer in the third through-hole, just first sealing washer with the second sealing washer is circular form, the third sealing washer is the rectangle form.

Further, the method also comprises the following steps: the protective cover corresponds to the shape of the sealing door and is arranged outside the sealing door, wherein the protective cover is provided with a second protruding part corresponding to the first protruding part, and the second protruding part is provided with a fourth through hole corresponding to the first through hole, a fifth through hole corresponding to the second through hole and a sixth through hole corresponding to the third through hole.

Furthermore, a plurality of accommodating holes are formed in the edge of the outer side face of the sealing door at intervals, and a plurality of inserting columns inserted into the accommodating holes are formed in the edge of the inner side face of the protective cover at intervals.

Further, the first supporting part comprises a first horizontal supporting plate arranged on the top plate, a first vertical supporting plate vertically arranged on the first horizontal supporting plate, a second vertical supporting plate arranged on the first vertical supporting plate in a lifting manner, and a second horizontal supporting plate connected with the second vertical supporting plate, wherein the first galvanometer is arranged on the second horizontal supporting plate; the second supporting part comprises a third horizontal supporting plate arranged on the top plate, a third vertical supporting plate vertically arranged on the third horizontal supporting plate, a fourth vertical supporting plate arranged on the third vertical supporting plate in a lifting mode and a fourth horizontal supporting plate connected with the fourth vertical supporting plate, wherein the second vibrating mirror is arranged on the fourth horizontal supporting plate.

Furthermore, a first long-strip-shaped opening is formed in the middle of the first vertical support plate in the vertical direction, a first protruding portion accommodated in the first long-strip-shaped opening is formed in the second vertical support plate, a first opening communicated with the first long-strip-shaped opening is formed in the top of the first vertical support plate in the vertical direction, a first threaded hole corresponding to the first opening is formed in the first protruding portion, a first lead screw is rotatably arranged in the first opening, and the first lead screw is in threaded connection with the first threaded hole of the first protruding portion; the middle part of third vertical support board is provided with the rectangular trompil of second along vertical direction, fourth vertical support board is equipped with accepts the second bulge in the rectangular trompil of second, wherein the top of third vertical support board along vertical direction be equipped with the second trompil of the rectangular trompil intercommunication of second, the second bulge be equipped with the second screw hole that the second trompil corresponds, just it is provided with the second lead screw to rotate in the second trompil, the second lead screw with the second screw hole threaded connection of second bulge.

Furthermore, a first slide rail and a second slide rail are arranged on the top plate at intervals, the first horizontal support rod is provided with a first slide block which can be arranged in the first slide rail in a sliding manner, and the second horizontal support rod is provided with a second slide block which can be arranged in the second slide rail in a sliding manner.

The invention has the beneficial effects that: different from the prior art, the novel 3D printer disclosed by the invention has good sealing effect, when a sealed cavity in the 3D printer needs to be cleaned, a sealing door of the 3D printer does not need to be opened, the inside of the sealed cavity is directly cleaned by manually using the sealing gloves manually, so that the external environment can not pollute the sealed cavity, the printing powder in the sealed cavity is not easy to leak out from the sealed cavity, the printing quality of a product can be effectively ensured, and the user experience is greatly improved.

Drawings

FIG. 1 is a schematic perspective view of the novel 3D printer of the present invention;

FIG. 2 is a schematic view of a first partial structure of the novel 3D printer of FIG. 1;

FIG. 3 is a second partial schematic view of the novel 3D printer of FIG. 1;

FIG. 4 is a third partial schematic view of the novel 3D printer of FIG. 1;

FIG. 5 is a schematic diagram of a fourth partial structure of the novel 3D printer in FIG. 1;

FIG. 6 is a sectional view of the top plate and the supporting part in FIG. 5;

FIG. 7 is a schematic diagram of a fifth partial structure of the novel 3D printer in FIG. 1;

FIG. 8 is a schematic structural diagram of a sealing door of the novel 3D printer in FIG. 1

Fig. 9 is a schematic structural diagram of a protective cover of the novel 3D printer in fig. 1.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in fig. 1 to 9, the novel 3D printer includes a first galvanometer 11, a second galvanometer 12, a top plate 13, a bottom plate 14, a front side plate 15, a rear side plate 16, a left side plate 17, a right side plate 18, a scraper 163, a sealing door 19, a protective cover 20, a first supporting portion 21, and a second supporting portion 22.

In the present embodiment, the top plate 13, the bottom plate 14, the front side plate 15, the rear side plate 16, the left side plate 17, and the right side plate 18 form a sealed chamber. It should be understood that this example is by 3D printing within a sealed chamber.

In the present embodiment, the rear side plate 16 is provided with an air outlet 161 communicating with the sealed cavity, wherein the rear side plate 16 is further provided with a chute 162 above the air outlet 161. It should be understood that the slide groove 162 is provided on the rear side plate 16 in the horizontal direction.

Preferably, an opening 151 is provided in the front side plate 15.

The scraper 163 is movably disposed in the chute 162 to spread the printing powder in the sealed cavity by the scraper 163. Preferably, the length of the chute 162 is slightly less than the horizontal length of the capsule so that the scraper 163 can scrape the entire capsule.

In the present embodiment, a sealing band is movably disposed in the sliding groove 162, and the connecting rod of the scraper 163 is connected with the sealing band, so that the sealing band and the scraper 163 move synchronously. It should be understood that, since the sliding groove 162 is communicated with the sealing cavity, in order to prevent the printing powder in the sealing cavity from leaking from the sliding groove 162, the sealing tape provided in the sliding groove 162 can effectively ensure that the printing powder in the sealing cavity cannot leak out of the sliding groove 162.

Further, the two ends of the sliding groove 162 are respectively provided with a first through hole and a second through hole for passing a sealing strip, and the length of the sealing strip is greater than that of the sliding groove 162, so that the sealing strip can always seal the sliding groove 162 when the sealing strip moves in the sliding groove 162.

Further, the upper and lower inner walls of the sliding groove 162 are respectively provided with a first receiving groove and a second receiving groove for receiving a sealing strip, and the width of the sealing strip is slightly larger than that of the sliding groove 162, so that the sealing strip can effectively seal the sliding groove 162.

An air outlet box 143 is disposed at an end of the bottom plate 14 close to the front side plate 15, wherein an air inlet 1431 is disposed at an end of the air outlet box 143 facing the air outlet 161. It should be understood that the present embodiment inputs the gas into the sealed cavity through the air inlet 1431 of the air outlet box 143, and outputs the gas in the sealed cavity through the air outlet 161, so as to ensure the gas circulation in the sealed cavity.

In this embodiment, a ventilation cavity communicated with the air inlet 1431 is disposed in the air outlet box 143, wherein the left side plate 17 and/or the right side plate 18 are/is provided with an air inlet through hole communicated with the ventilation cavity, so that air can be conveyed to the ventilation cavity of the air outlet box 143 through the air inlet through hole.

Preferably, the outlet box 143 has a rectangular shape, wherein the length of the outlet box 143 is equal to the distance between the left side plate 17 and the right side plate 18.

The first support portion 21 and the second support portion 22 are disposed in the top plate 13 at an interval, wherein the first galvanometer 11 is adjustably disposed on top of the first support portion 21, and the second galvanometer 12 is adjustably disposed on top of the second support portion 22.

In this embodiment, the top plate 13 is provided with a first through hole 131 corresponding to the laser head of the first galvanometer 11 and a second through hole 132 corresponding to the laser head of the second galvanometer 12 at an interval, so that the laser emitted by the first galvanometer 11 enters the sealed cavity through the first through hole 131 for printing, and the laser emitted by the second galvanometer 12 enters the sealed cavity through the second through hole 132 for printing.

In this embodiment, the bottom plate 14 is provided with a first discharging hole 141 and a second discharging hole 142 at an interval, wherein the first discharging hole 141 is provided with a first piston in a liftable manner, and the second discharging hole 142 is provided with a second piston in a liftable manner. It should be understood that, in the present embodiment, the printing powder can be driven to ascend by the ascending and descending of the first piston, and the printing powder can be driven to ascend by the ascending and descending of the second piston.

It is worth noting that the bottom of the first piston is provided with a first cylinder, the first piston can be driven to lift through the first cylinder, and the bottom of the second piston is provided with a second cylinder, the second piston can be driven to lift through the second cylinder. Preferably, the first cylinder and the second cylinder can be implemented by using products in the prior art, and the principle of the first cylinder and the principle of the second cylinder are not repeated herein.

In the present embodiment, the first support part 21 includes a first horizontal support plate 211 disposed on the top plate 13, a first vertical support plate 212 vertically disposed on the first horizontal support plate 211, a second vertical support plate 213 elevatably disposed on the first vertical support plate 212, and a second horizontal support plate 214 connected to the second vertical support plate 213, wherein the first galvanometer 11 is disposed on the second horizontal support plate 214. It should be understood that the second horizontal support plate 214 is disposed perpendicular to the second vertical support plate 213, and the second vertical support plate 213 is disposed on the first vertical support plate 212 in a lifting manner, so that the first galvanometer 11 can be driven to lift in a vertical direction.

Further, a first elongated hole 2121 is formed in a middle portion of the first vertical support plate 212 along a vertical direction, wherein the second vertical support plate 213 is provided with a first protrusion 2131 received in the first elongated hole 2121, a first hole 2122 communicating with the first elongated hole 2121 is formed in a top portion of the first vertical support plate 212 along the vertical direction, the first protrusion 2131 is provided with a first threaded hole 2132 corresponding to the first hole 2122, and a first lead screw is rotatably disposed in the first hole 2122 and threadedly coupled to the first threaded hole 2132 of the first protrusion 2131, so that the first lead screw can be rotated to adjust the first protrusion 2131 to ascend and descend in the first elongated hole 2121.

It should be understood that the first protrusion 2131 can vertically move up and down in the first elongated hole 2121, thereby moving the second vertical support plate 213 vertically on the first vertical support plate 212.

In the present embodiment, the second support part 22 includes a third horizontal support plate 221 disposed on the top plate 13, a third vertical support plate 222 vertically disposed on the third horizontal support plate 221, a fourth vertical support plate 223 elevatably disposed on the third vertical support plate 222, and a fourth horizontal support plate 224 connected to the fourth vertical support plate 223, wherein the second galvanometer 12 is disposed on the fourth horizontal support plate 224. It should be understood that the fourth horizontal support plate 224 is vertically disposed with the fourth vertical support plate 223, and the fourth vertical support plate 223 is disposed on the third vertical support plate 222 in a lifting manner, so that the second galvanometer 12 can be driven to lift in the vertical direction.

Further, a second elongated hole 2221 is vertically formed in the middle of the third vertical support plate 222, a second protrusion 2231 received in the second elongated hole 2221 is formed in the fourth vertical support plate 223, a second hole 2222 communicating with the second elongated hole 2221 is vertically formed in the top of the third vertical support plate 222, a second threaded hole 2232 corresponding to the second hole 2222 is formed in the second hole 2222, and a second lead screw is rotatably disposed in the second hole 2222 and threadedly coupled to the second threaded hole 2232 of the second protrusion 2231, so that the second protrusion 2231 can be adjusted to move up and down in the second elongated hole 2221 by rotating the second lead screw.

It should be understood that the second protrusion 2231 can be vertically raised and lowered in the second elongated opening 2221, so that the fourth vertical support plate 223 can be driven to move vertically on the third vertical support plate 222.

Further, in the present embodiment, a first slide rail and a second slide rail are disposed on the top plate 13 at an interval, wherein the first horizontal support rod 211 is provided with a first slider slidably disposed in the first slide rail, and the second horizontal support rod 221 is provided with a second slider slidably disposed in the second slide rail, so that the first horizontal support plate 211 and/or the second horizontal support plate 221 can be moved (e.g., manually moved) as required to adjust the horizontal position of the first galvanometer 11 and/or the second galvanometer 12.

It will be appreciated that the first and second tracks are in the same line and that the first track is parallel to the edge of the top plate 13. Furthermore, the first slide rail comprises a first groove arranged along the horizontal direction and a first slide rod arranged in the first groove, wherein the first slide block is provided with a first slide hole, and the first slide rod penetrates through the first slide hole; the second slide rail includes the second recess that sets up along the horizontal direction and sets up the second slide bar in the second recess, and wherein the second slider is equipped with the second slide opening, and the second slide bar is worn to establish in the second slide opening.

One end of the sealing door 19 is rotatably provided in a side of the front side plate 15 remote from the rear side plate 16. It should be understood that the sealing door 19 of the present embodiment may be pivotally disposed in a side of the front panel 15 by conventional means (e.g., hinge, screw, or other means).

In this embodiment, the sealing door 19 is provided with a first protrusion 190 recessed towards a direction away from the rear side plate 16 and corresponding to the opening 151, wherein the first protrusion 190 is provided with a first through hole 191, a second through hole 192 and a third through hole 193, respectively, a first sealing glove is provided in the first through hole 191, a second sealing glove is provided in the second through hole 192, and a transparent glass is provided in the third through hole 193. It should be understood that this embodiment is through setting up sealed gloves in sealing door 19 for when needs clear up the sealed chamber in the 3D printer, need not to open the sealing door of 3D printer, directly establish in sealed gloves through the staff cover in order to clear up the inside in sealed chamber through sealed gloves, make external environment can not pollute sealed chamber, with the printing quality of guaranteeing the product, promoted user's experience greatly.

It should be understood that the ends of the first and second sealing gloves (i.e., the ends that do not receive the fingers) may be disposed in the through holes by means of adhesive, and the first and second sealing gloves may be implemented by using commercially available rubber gloves or other sealing gloves.

Preferably, the first and second through holes 191 and 192 are respectively disposed at both sides of the first protrusion 190, and the third through hole 193 is disposed between the first and second through holes 191 and 192.

Preferably, the first and second through holes 191 and 192 are circular, and the third through hole 193 is rectangular.

In the present embodiment, the first seal 194 is provided in the first through hole 191, the second seal 195 is provided in the second through hole 192, and the third seal 196 is provided in the third through hole 193. Preferably, the first and second sealing rings 194 and 195 have a circular shape, and the third sealing ring 196 has a rectangular shape.

It should be understood that the first sealing ring 194 of the present embodiment may be fixed to the outer wall of the first through hole 191 by means of an adhesive or a screw, and the end of the first sealing glove is disposed between the first sealing ring 194 and the outer wall of the first through hole 191; the second sealing ring 195 may be fixed to the outer wall of the second through hole 192 by an adhesive means or a screw means, and the end of the second sealing glove is disposed between the second sealing ring 195 and the outer wall of the second through hole 192; the third sealing ring 196 may be fixed to an outer wall of the third through hole 193 by an adhesive means or a screw means, and an end of the third sealing glove is disposed between the third sealing ring 196 and the outer wall of the third through hole 193.

The protective cover 20 corresponds to the shape of the sealing door 19, and the protective cover 20 is disposed outside the sealing door 19 to protect the sealing door 19 by the protective cover 20.

In the present embodiment, the protective cover 20 is provided with a second protrusion 201 corresponding to the first protrusion 190. Preferably, the second protrusion 201 is provided with a fourth through hole 202 corresponding to the first through hole 191, a fifth through hole 203 corresponding to the second through hole 192, and a sixth through hole 204 corresponding to the third through hole 193.

Preferably, the aperture of the fourth through hole 202 is slightly smaller than that of the first through hole 191, the aperture of the fifth through hole 203 is slightly smaller than that of the second through hole 192, and the aperture of the sixth through hole 204 is slightly smaller than that of the third through hole 193, so that the sealing ring can be tightly pressed.

In this embodiment, a plurality of receiving holes 197 are formed at intervals on the outer side edge of the sealing door 19, and a plurality of insertion posts 205 inserted into the plurality of receiving holes 197 are formed at intervals on the inner side edge of the protective cover 20, so that the protective cover 20 can be disposed outside the sealing door 19.

It is understood that in other embodiments, one of the outer side of the sealing door 19 facing the protective cover 20 and the inner side of the protective cover 20 facing the sealing door 19 is provided with a first magnet, and the other of the outer side of the sealing door 19 facing the protective cover 20 and the inner side of the protective cover 20 facing the sealing door 19 is provided with a second magnet for attracting the first magnet.

Further, in this embodiment, a baffle 206 is disposed at an edge of an inner side surface of the protective cover 20, wherein the baffle 206 and the inner side surface of the protective cover 20 form a receiving cavity, and the sealing door 19 is received in the receiving cavity.

In conclusion, the novel 3D printer disclosed by the invention has a good sealing effect, when the sealed cavity in the 3D printer needs to be cleaned, a sealing door of the 3D printer does not need to be opened, the inside of the sealed cavity is directly cleaned by manually using the sealing gloves, so that the external environment cannot pollute the sealed cavity, the printing powder in the sealed cavity cannot easily leak out of the sealed cavity, the printing quality of a product can be effectively ensured, and the user experience is greatly improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.