A 3D printer with a replaceable print head

Abstract

The application discloses a quick-replaceable printing head for a 3D printer, and particularly relates to the technical field of 3D printing, which comprises a printer cabinet, the inner wall of the printer cabinet is fixedly connected with the outer surface of a moving frame, the lower surface of the moving frame is fixedly connected with four first limiting rods, and the outer surface of each of the four first limiting rods is provided with a moving device, and the two moving devices are fixedly connected through a moving rod. The sealing plate, the sealing connecting plate, the third limiting rod and the guide groove are arranged, the whole dismounting process can be completed only by rotating the printing head, the sealing effect of the printer shell can be realized through necessary rotating steps in the dismounting process, the printing head is not prone to causing personnel injury due to the dropping of high-temperature printing liquid remaining in the printer shell in the dismounting process, the safety during use of the printing head is ensured, and the occurrence of resource waste can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, more particularly, the present application relates to a 3D printer with a quickly replaceable print head. BACKGROUND

[0002] A 3D printer, also known as a three-dimensional printer, is a kind of cumulative manufacturing technology, i.e. a kind of machine of rapid prototyping technology, which is based on a digital model file, and uses special wax material, powdered metal or plastic and other adhesives to print a layer of adhesives to manufacture a three-dimensional object.

[0003] At present, during the use of the 3D printer, the wax material or plastic and other impurities inside the print head will often block the print head after solidification, resulting in a blockage during subsequent use of the 3D printer. In view of the above situation, the print head inside is usually disassembled and cleaned to solve the problem of blockage. However, when the wax material or plastic solidifies, the connection part of the print head and the printer will be reinforced by the wax material or plastic, resulting in difficulty in disassembly. If the wax material or plastic is in a molten state, disassembly will easily cause the wax material or plastic to drop and cause burns to the workers. At the same time, the existing print head usually adopts a threaded installation method, which makes the disassembly and installation process cumbersome and limits the use effect of the print head. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the present application provides a 3D printer with a quickly replaceable print head, and the technical problems to be solved by the present application are: when the wax material or plastic solidifies, the connection part of the print head and the printer will be reinforced by the wax material or plastic, resulting in difficulty in disassembly. If the wax material or plastic is in a molten state, disassembly will easily cause the wax material or plastic to drop and cause burns to the workers. At the same time, the existing print head usually adopts a threaded installation method, which makes the disassembly and installation process cumbersome and limits the use effect of the print head.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a 3D printer with a replaceable print head, comprising a printer cabinet, the inner wall of the printer cabinet is fixedly connected with the outer surface of a moving frame, the lower surface of the moving frame is fixedly connected with four first limiting rods, the outer surface of the four first limiting rods is provided with a moving device, two moving devices are fixedly connected through a moving rod, the four moving devices are interlocked with the outer surface of the same printer shell through two moving rods, the lower surface of the printer shell is fixedly connected with a mounting ring, the discharge opening formed in the lower surface of the printer shell is fixedly connected with a first adjusting piece, the lower surface of the first adjusting piece is provided with a plurality of first clamping blocks, the inner wall of each first clamping block is fixedly connected with a second clamping block, the lower surface of each second clamping block is fixedly connected with the upper surface of the same connecting head, the upper surface of the connecting head is provided with a sealing ring, and the upper surface of the connecting head and the lower surface of the first adjusting piece are interlocked.

[0006] The lower surface of the first adjusting piece is provided with six first limiting grooves, the inner wall of each first limiting groove is provided with a second limiting groove, a second limiting rod is slidably connected in the first limiting groove, the outer surface of the second limiting rod and the inner wall of the first limiting groove are interlocked, a limiting ring is slidably connected in the second limiting groove, the inner wall of the limiting ring and the outer surface of the second limiting rod are fixedly connected, the outer surface of the second limiting rod and the outer surface of the sealing plate are fixedly connected, the opposite surfaces of two sealing plates are fixedly connected with sealing connecting plates, the opposite surfaces of two sealing connecting plates are interlocked, the shape of the sealing plate and the shape of the sealing connecting plate are both triangular, the top end of the second limiting rod passes through the sealing plate and is clamped in the second guide groove, and the second guide groove is formed in the lower surface of the second adjusting piece.

[0007] As a further scheme of the present application, the upper surface of the sealing plate is provided with a first guide groove, six third limiting rods are slidably connected in the six first guide grooves, the top end of each third limiting rod is fixedly connected with the lower surface of a corresponding limiting clamping block, and the upper surface of each limiting clamping block is fixedly connected with the lower surface of the same second adjusting piece.

[0008] As a further scheme of the present application, the lower surface of the second adjusting piece is fixedly connected with the bottom end of a conveying pipe, the bottom end of the conveying pipe and the upper surface of six sealing connecting plates are interlocked, the second adjusting piece is connected with the printer shell through the conveying pipe, and the lower surface of the first adjusting piece is provided with a discharge opening, the position of the discharge opening corresponds to the position of the conveying pipe.

[0009] As a further scheme of the present application, the upper surface of the connecting head is fixedly connected with a connecting pipe, the connecting head is connected with the print head through the connecting pipe, the upper surface of the print head is fixedly connected with the lower surface of the connecting head, and the connecting head is connected with the second discharge opening through the connecting pipe.

[0010] As a further scheme of the present application: the outer surface of the connecting head is fixedly connected with the inner wall of the mounting piece, the upper surface of the mounting piece is fixedly connected with six clamping rods, and the outer surfaces of the six clamping rods are respectively mutually overlapped with the inner walls of the six first moving grooves, the six first moving grooves are all arranged on the lower surface of the mounting ring, and the top end of the clamping rod is fixedly connected with a sealing clamping plate.

[0011] As a further scheme of the present application: the outer surface of the sealing clamping plate is mutually clamped with the inner wall of the second moving groove, the second moving groove is arranged in the first moving groove, the mounting ring is communicated with the heat dissipation device through the printer shell, the back surface of the heat dissipation device is fixedly connected with the front surface of the printer shell, and the upper surface and the lower surface of the inner wall of the first moving groove are all arranged as inclined surfaces.

[0012] As a further scheme of the present application: the shape of the first clamping block is matched with the shape of the second clamping block, the outer surface of the connecting head is mutually overlapped with the inner wall of the mounting ring, and the upper surface of the printer shell is provided with a discharging device.

[0013] As a further scheme of the present application: the left and right sides of the printer cabinet are both provided with a plurality of heat dissipation openings, the front surface of the printer cabinet is provided with an observation window, the observation window is arranged as a tempered glass window, and the front surface of the printer cabinet is provided with a drawer.

[0014] The present application has the following beneficial effects:

[0015] 1. The sealing plate, the third limiting rod, the sealing connecting plate, the third limiting rod and the guide groove are arranged, the sealing plate is limited by the third limiting rod and the first guide groove, so that the sealing plate eccentrically rotates along the third limiting rod when being pulled, the six sealing connecting plates are pushed by the sealing plate, and the opposite surfaces of the two are in a state of adhesion, so as to isolate the printing liquid in the printer shell, the clamping rod and the sealing clamping plate move along the first moving groove and the second moving groove in the process of counterclockwise rotating the print head, and when moving to the limit position of the second moving groove, the whole disassembly process can be completed only by rotating the print head, so as to greatly reduce the difficulty of disassembling the print head, and the sealing effect of the printer shell can be realized through necessary rotating steps in the disassembly process, so that the print head is not easy to cause personnel injury due to the dropping of high-temperature printing liquid remaining in the printer shell in the disassembly process, the safety in use of the print head is ensured, and the waste of resources can be reduced.

[0016] 2. The present application sets up the heat dissipation device, the first moving groove, the second moving groove and the sealing clamping plate, in the process of installing the print head, only need to align the second clamping block above the print head with the first clamping block and install them, when guaranteeing that the clamping rod and the sealing clamping plate are in the first moving groove and the second moving groove respectively, rotate the print head clockwise, at this time, since the sealing plate is limited by the third limiting rod and the first guide groove, the sealing plate will eccentrically rotate along the third limiting rod when being pulled, six sealing connecting plates will deflect each other along the third limiting rod principle, at this time, the printer shell will be connected with the print head through the conveying pipe, the discharge port and the connecting pipe, since the installation and disassembly of the whole print head can be realized by rotating clockwise and counterclockwise by a certain angle, the difficulty of using the print head is greatly reduced, and the stability of the print head after installation is fixed by the heat dissipation device adsorbing the sealing clamping plate, so that the print head is prevented from falling off.

[0017] 3. The present application sets up the first moving groove, the clamping rod and the sealing clamping plate, since the upper surface of the inner wall of the first moving groove is designed as a slope, when adjusting the position of the clamping rod and the sealing clamping plate along the first moving groove, the clamping rod and the sealing clamping plate will be gradually extruded due to the shape of the inside of the first moving groove, so that the clamping rod and the sealing clamping plate are fixed after installation due to the extrusion of the inside of the first moving groove, the stability of the print head after installation is guaranteed, and the difficulty of installing the print head is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic view of the present application;

[0019] Figure 2 It is a three-dimensional cross-sectional structure schematic view of the printer cabinet of the present application;

[0020] Figure 3 It is an exploded structure schematic view of the printer shell of the present application;

[0021] Figure 4 It is a three-dimensional structure schematic view of the connecting head of the present application;

[0022] Figure 5 It is an exploded structure schematic view of the first adjusting piece of the present application;

[0023] Figure 6 It is a three-dimensional structure schematic view of the first adjusting piece of the present application;

[0024] As shown in the figure: 1 printer cabinet, 2 moving frame, 3 first limiting rod, 4 moving device, 5 printer shell, 6 mounting ring, 7 first adjusting piece, 8 first clamping block, 9 second clamping block, 10 connecting head, 11 sealing ring, 12 print head, 13 first limiting groove, 14 second limiting groove, 15 second limiting rod, 16 limiting ring, 17 sealing plate, 18 first guide groove, 19 third limiting rod, 20 limiting clamping block, 21 sealing connecting plate, 22 second guide groove, 23 second adjusting piece, 24 material conveying pipe, 25 discharging port, 26 connecting pipe, 27 mounting piece, 28 clamping rod, 29 sealing clamping plate, 30 first moving groove, 31 second moving groove, 32 heat dissipation device, 33 heat dissipation port, 34 discharging device, 35 observation window. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] As Figures 1-6 shown, the present application provides a 3D printer with a print head that can be quickly replaced, comprising a printer cabinet 1, the inner wall of the printer cabinet 1 is fixedly connected with the outer surface of the moving frame 2, the lower surface of the moving frame 2 is fixedly connected with four first limiting rods 3, and the outer surface of the four first limiting rods 3 is provided with a moving device 4, and the two moving devices 4 are fixedly connected by a moving rod, and the four moving devices 4 are fixedly connected by two moving rods and the outer surface of the same printer shell 5, the lower surface of the printer shell 5 is fixedly connected with a mounting ring 6, and the discharging port opened on the lower surface of the printer shell 5 is fixedly connected with a first adjusting piece 7, the lower surface of the first adjusting piece 7 is provided with a plurality of first clamping blocks 8, and the plurality of first clamping blocks 8 are fixedly connected with a second clamping block 9, the lower surface of the plurality of second clamping blocks 9 is fixedly connected with the upper surface of the same connecting head 10, the upper surface of the connecting head 10 is provided with a sealing ring 11, and the upper surface of the connecting head 10 and the lower surface of the first adjusting piece 7 are mutually overlapped.

[0027] The lower surface of the first adjusting sheet 7 is provided with six first limiting grooves 13, and the inner walls of the six first limiting grooves 13 are provided with second limiting grooves 14, the first limiting grooves 13 are slidably connected with second limiting rods 15, the outer surfaces of the second limiting rods 15 are connected with the inner walls of the first limiting grooves 13, the second limiting grooves 14 are slidably connected with limiting rings 16, the inner walls of the limiting rings 16 are fixedly connected with the outer surfaces of the second limiting rods 15, the outer surfaces of the second limiting rods 15 are fixedly connected with the outer surfaces of sealing plates 17, the opposite surfaces of the two sealing plates 17 are fixedly connected with sealing connecting plates 21, the opposite surfaces of the two sealing connecting plates 21 are connected with each other, the shapes of the sealing plates 17 and the sealing connecting plates 21 are all triangular, the top ends of the second limiting rods 15 pass through the sealing plates 17 and are clamped in second guide grooves 22, the second guide grooves 22 are arranged on the lower surfaces of second adjusting sheets 23, the sealing plates 17, the third limiting rods 19 and the guide grooves are arranged, the whole disassembling process can be completed by rotating the print head 12, so that the difficulty of disassembling the print head is greatly reduced, meanwhile, the sealing effect of the printer shell 5 can be realized by necessary rotating steps in the disassembling process, so that the print head is not easy to cause personnel injury due to the dropping of high-temperature printing liquid remaining in the printer shell 5 in the disassembling process, the safety of using the print head is ensured, and the resource waste can be reduced.

[0028] As Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the upper surface of the sealing plate 17 is provided with a first guide groove 18, and the six first guide grooves 18 are slidably connected with third limiting rods 19, and the top ends of the six third limiting rods 19 are fixedly connected with the lower surfaces of six limiting blocks 20, the upper surfaces of the six limiting blocks 20 are fixedly connected with the lower surfaces of the same second adjusting piece 23, the lower surface of the second adjusting piece 23 is fixedly connected with the bottom end of the conveying pipe 24, and the bottom end of the conveying pipe 24 is overlapped with the upper surfaces of the six sealing connecting plates 21. Due to the arrangement of the heat dissipation device 32 and the sealing block 29, the installation and disassembly of the entire printing head can be realized by only rotating clockwise and counterclockwise by a certain angle, thereby greatly reducing the difficulty of using the printing head, and the sealing block 29 is adsorbed by the heat dissipation device 32, thereby realizing the stability of the fixed printing head 12 after installation, avoiding the falling of the printing head 12, the second adjusting piece 23 is communicated with the printer shell 5 through the conveying pipe 24, the lower surface of the first adjusting piece 7 is provided with a discharge port 25, the position of the discharge port 25 corresponds to the position of the conveying pipe 24, the upper surface of the connecting head 10 is fixedly connected with a connecting pipe 26, the connecting head 10 is communicated with the printing head 12 through the connecting pipe 26, the upper surface of the printing head 12 is fixedly connected with the lower surface of the connecting head 10, and the connecting head 10 is communicated with the second discharge port 25 through the connecting pipe 26.

[0029] As shown in Figure 2 , Figure 3 , Figure 4 and Figure 6 , the outer surface of the connecting head 10 is fixedly connected with the inner wall of the mounting piece 27, the upper surface of the mounting piece 27 is fixedly connected with six clamping rods 28, and the outer surfaces of the six clamping rods 28 are respectively overlapped with the inner walls of the six first moving grooves 30, the six first moving grooves 30 are arranged on the lower surface of the mounting ring 6, the top end of the clamping rod 28 is fixedly connected with the sealing block 29, the outer surface of the sealing block 29 is clamped with the inner wall of the second moving groove 31, and the second moving groove 31 is arranged in the first moving groove 30. The mounting ring 6 is communicated with the heat dissipation device 32 through the printer shell 5, the back surface of the heat dissipation device 32 is fixedly connected with the front surface of the printer shell 5, and the upper surface and the lower surface of the inner wall of the first moving groove 30 are both arranged as inclined surfaces. Since the upper surface and the lower surface of the inner wall of the first moving groove 30 are both designed as inclined surfaces, when the positions of the clamping rod 28 and the sealing block 29 are adjusted along the first moving groove 30, the clamping rod 28 and the sealing block 29 will be gradually squeezed due to the shape of the inside of the first moving groove 30, thereby ensuring that the clamping rod 28 and the sealing block 29 will be fixed due to the squeezing of the inside of the first moving groove 30 after installation, ensuring the stability of the printing head after installation, and reducing the difficulty of installing the printing head 12.

[0030] As shown in Figure 1 ,Figure 3 and Figure 5 As shown in the drawings, the shape of the first clamping block 8 and the shape of the second clamping block 9 are matched, the outer surface of the connecting head 10 and the inner wall of the mounting ring 6 are overlapped with each other, the upper surface of the printer shell 5 is provided with a discharging device 34, and the printer shell 5 is communicated with the upper surface of the inner wall of the printer cabinet 1 through the discharging device 34. The printer head can effectively reduce the temperature inside the printer cabinet 1 during use due to the setting of the heat dissipation port 33 and the heat dissipation device 32, so as to avoid the situation that the printed products are melted or damaged due to the heat accumulation of the printing liquid inside the printer cabinet 1, and the product quality processed by the printer head is guaranteed. The left and right sides of the printer cabinet 1 are provided with a plurality of heat dissipation ports 33, the front of the printer cabinet 1 is provided with an observation window 35, the observation window 35 is a tempered glass window, and the front of the printer cabinet 1 is provided with a drawer.

[0031] The working principle of the present application is as follows: when the printer head 12 needs to be replaced, the temperature of the printing liquid in the printer head 12 needs to be maintained. When the temperature of the printing liquid is maintained in a molten state, the printer head 12 only needs to be rotated counterclockwise. Since the printer head 12 is rotated counterclockwise, the printer head 12 drives the first adjusting piece 7 to rotate through the first clamping block 8 and the second clamping block 9, so that the first adjusting piece 7 pulls the sealing plate 17 as a fulcrum through the second limiting rod 15 during rotation. At this time, since the sealing plate 17 is limited by the third limiting rod 19 and the first guide groove 18, the sealing plate 17 will eccentrically rotate along the third limiting rod 19 when it is pulled. At the same time, the six sealing connecting plates 21 are pushed by the sealing plate 17, and the corresponding two opposite surfaces are in a state of adhesion, so as to isolate the printing liquid inside the printer shell 5. Since the clamping rod 28 and the sealing clamping plate 29 will move along the first moving groove 30 and the second moving groove 31 during the counterclockwise rotation of the printer head 12, and when they move to the limit position of the second moving groove 31, the six sealing connecting plates 21 will contact each other at the same time, and the sealing clamping plate 29 will be at the through hole of the first moving groove 30. At this time, the printer head 12 can be disassembled by only pulling it downward. During the installation of the printer head 12, the second clamping block 9 above the printer head 12 is aligned with the first clamping block 8, and the two are installed. When the clamping rod 28 and the sealing clamping plate 29 are respectively located in the first moving groove 30 and the second moving groove 31, the printer head 12 is rotated clockwise. At this time, since the sealing plate 17 is limited by the third limiting rod 19 and the first guide groove 18, the sealing plate 17 will eccentrically rotate along the third limiting rod 19 when it is pulled. The six sealing connecting plates 21 will deflect along the third limiting rod 19. At this time, the printer shell 5 is connected with the printer head 12 through the feeding pipe 24, the discharging port 25 and the connecting pipe 26.

[0032] Finally should be explained a few points are: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the term "installation", "connected", "connection" should be broad, can be mechanical or electrical connection, but also can be two elements inside the communication, can be directly connected, "up", "down", "left", "right" and so on, only for indicating the relative position relationship, when the absolute position of the described object changes, the relative position relationship may change;

[0033] Second: the present application discloses the embodiment in the drawing, only relates to the structure involved in the present application, other structures can refer to the usual design, in the case of no conflict, the same embodiment and different embodiments of the present application can be combined with each other;

[0034] Finally: the above only for the preferred embodiment of the present application, and not for limiting the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A 3D printer with quick replaceable print head, comprising a printer cabinet (1), characterized in that: The inner wall of the printer cabinet (1) is fixedly connected with the outer surface of the moving frame (2), the lower surface of the moving frame (2) is fixedly connected with four first limiting rods (3), and the outer surfaces of the four first limiting rods (3) are all provided with moving devices (4), and the corresponding two moving devices (4) are fixedly connected through moving rods, the four moving devices (4) are interlocked with the outer surface of the same printer shell (5) through two moving rods, the lower surface of the printer shell (5) is fixedly connected with a mounting ring (6), the discharge opening formed in the lower surface of the printer shell (5) is fixedly connected with a first adjusting piece (7), the lower surface of the first adjusting piece (7) is provided with a plurality of first clamping blocks (8), and the plurality of first clamping blocks (8) are all clamped with second clamping blocks (9), the lower surfaces of the plurality of second clamping blocks (9) are fixedly connected with the upper surface of the same connecting head (10), the upper surface of the connecting head (10) is provided with a sealing ring (11), and the upper surface of the connecting head (10) and the lower surface of the first adjusting piece (7) are interlocked; The lower surface of the first adjusting piece (7) is provided with six first limiting grooves (13), and the inner walls of the six first limiting grooves (13) are all provided with second limiting grooves (14), the first limiting grooves (13) are slidably connected with second limiting rods (15), the outer surfaces of the second limiting rods (15) and the inner walls of the first limiting grooves (13) are interlocked, the second limiting grooves (14) are slidably connected with limiting rings (16), the inner walls of the limiting rings (16) and the outer surfaces of the second limiting rods (15) are fixedly connected, the outer surfaces of the second limiting rods (15) and the outer surfaces of sealing plates (17) are fixedly connected, the opposite surfaces of the corresponding two sealing plates (17) are fixedly connected with sealing connecting plates (21), the opposite surfaces of the corresponding two sealing connecting plates (21) are interlocked, the shapes of the sealing plates (17) and the sealing connecting plates (21) are all triangular, the top ends of the second limiting rods (15) pass through the sealing plates (17) and are clamped in the second guide grooves (22), and the second guide grooves (22) are formed in the lower surface of the second adjusting piece (23); The upper surfaces of the sealing plates (17) are provided with first guide grooves (18), the six first guide grooves (18) are all slidably connected with third limiting rods (19), the top ends of the six third limiting rods (19) are fixedly connected with the lower surfaces of six limiting clamping blocks (20) respectively, and the upper surfaces of the six limiting clamping blocks (20) are fixedly connected with the lower surface of the same second adjusting piece (23); The lower surface of the second adjusting piece (23) is fixedly connected with the bottom end of the conveying pipe (24), the bottom end of the conveying pipe (24) and the upper surfaces of the six sealing connecting plates (21) are interlocked, the second adjusting piece (23) is connected with the printer shell (5) through the conveying pipe (24), and the lower surface of the first adjusting piece (7) is provided with a discharge opening (25), and the position of the discharge opening (25) corresponds to the position of the conveying pipe (24). The upper surface of the connecting head (10) is fixedly connected with a connecting pipe (26), the connecting head (10) is communicated with the print head (12) through the connecting pipe (26), the upper surface of the print head (12) is fixedly connected with the lower surface of the connecting head (10), and the connecting head (10) is communicated with the second feeding port (25) through the connecting pipe (26).

2. The 3D printer with quick replaceable print head according to claim 1, characterized in that: The outer surface of the connecting head (10) is fixedly connected with the inner wall of the mounting sheet (27), the upper surface of the mounting sheet (27) is fixedly connected with six clamping rods (28), the outer surfaces of the six clamping rods (28) are respectively and mutually overlapped with the inner walls of six first moving grooves (30), the six first moving grooves (30) are all arranged on the lower surface of the mounting ring (6), and the top end of the clamping rod (28) is fixedly connected with a sealing clamping plate (29).

3. The 3D printer with quick replaceable print head according to claim 2, characterized in that: The outer surface of the sealing clamping plate (29) is mutually clamped with the inner wall of a second moving groove (31), the second moving groove (31) is arranged in the first moving groove (30), the mounting ring (6) is communicated with a heat dissipation device (32) through the printer shell (5), the back surface of the heat dissipation device (32) is fixedly connected with the front surface of the printer shell (5), and the upper surface and the lower surface of the inner wall of the first moving groove (30) are all arranged as inclined surfaces.

4. The 3D printer with quick replaceable print head according to claim 1, characterized in that: The shape of the first clamping block (8) is matched with the shape of the second clamping block (9), the outer surface of the connecting head (10) is mutually overlapped with the inner wall of the mounting ring (6), the upper surface of the printer shell (5) is provided with a feeding device (34), and the printer shell (5) is communicated with the upper surface of the inner wall of the printer cabinet (1) through the feeding device (34).

5. The 3D printer with quick replaceable print head according to claim 1, characterized in that: The left and right sides of the printer cabinet (1) are both provided with a plurality of heat dissipation openings (33), the front surface of the printer cabinet (1) is provided with an observation window (35), the observation window (35) is arranged as a tempered glass window, and the front surface of the printer cabinet (1) is provided with a drawer.

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