CN112123753A

CN112123753A - Multifunctional 3D printer and printing material thereof

Info

Publication number: CN112123753A
Application number: CN202010769326.6A
Authority: CN
Inventors: 叶佩秋; 杨皓然
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2020-12-25

Abstract

The invention belongs to the technical field of 3D printing, and particularly relates to a multifunctional 3D printer and a printing material thereof, wherein the 3D printer comprises a workbench; an X-axis guide rail, a Y-axis guide rail, a Z-axis guide rail, a printing platform and a printing nozzle are arranged on the workbench; the upper end of the printing nozzle is provided with a feeding guide pipe, the lower end of the feeding guide pipe is provided with a Y-shaped hot melting pipe, two inlets at the upper end of the hot melting pipe are opposite to the lower end of each feeding guide pipe, the outer side wall of the hot melting pipe is provided with a heating block, and a feeding unit is arranged below the hot melting pipe; the feeding unit comprises a first motor and two gears; an output shaft of the first motor penetrates through the side wall of the printing nozzle and is fixedly connected with one gear, the two gears are meshed with each other, a printing material penetrates between the two gears, a feeding pipe is arranged below the two gears which are meshed with each other, and the feeding pipe is communicated with the hot melting nozzle; through the cooperation between the feeding guide pipe, the hot melting pipe and the feeding unit, the hot melting extrusion forming of the two printing materials is realized.

Description

Multifunctional 3D printer and printing material thereof

Technical Field

The invention belongs to the technical field of 3D printing, and particularly relates to a multifunctional 3D printer and a printing material thereof.

Background

3D printing (3DP), a technique for constructing objects by layer-by-layer printing using bondable materials such as powdered metals or plastics based on digital model files, is one of the rapid prototyping techniques, also known as additive manufacturing. 3D printing is typically achieved using digital technology material printers. The method is often used for manufacturing models in the fields of mold manufacturing, industrial design and the like, and is gradually used for directly manufacturing some products, and parts printed by the technology are already available. The technology has applications in jewelry, footwear, industrial design, construction, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.

When printing the product, if want to print out the product of multiple colour through the 3D printer, need change the printing material at the printing in-process to current 3D printer for it is loaded down with trivial details to print the process, and in the material tip was difficult to the accuracy and inserts the admission pipe, brought unnecessary trouble for the operator.

The 3D printer disclosed in application number 2014103579853 comprises a rack, wherein the rack is provided with a base, the base is provided with a printing bottom plate, stand columns are arranged on two sides of the base, the stand columns are provided with printing platforms, the base is also provided with a Z-axis moving system, the Z-axis moving system is connected with the printing platforms, the printing platforms can move relative to the stand columns under the action of the Z-axis moving system, a pulley block is arranged between the printing platforms and the rack, the surface of each printing platform is provided with an X-axis moving system and a Y-axis moving system, the Y-axis moving system is fixed on the printing platforms, the X-axis moving system is arranged on the Y-axis moving system and can slide relative to the Y-axis moving system, the X-axis moving system is provided with a nozzle mounting base, the nozzle mounting base can horizontally slide relative to the X-axis moving system, the nozzle; this 3D printer can only use the material of same colour to print when printing the product for the product colour of printing out is monotonous, and wants to print out the product of multiple colour through the 3D printer, need change the printing material at the printing in-process, makes the printing process loaded down with trivial details, and in the material tip was difficult to the accuracy and inserts the feed pipe, brought unnecessary trouble for the operator.

In view of this, in order to overcome the above technical problem, this company has designed and developed a multi-functional 3D printer and printing material thereof, through settling two feeding pipes on printing the shower nozzle, and insert the material of different colours in the feeding pipe, make and print out the product that two kinds of colours intersect each other, richen the colour of printing the product, solved above-mentioned technical problem.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems that the color of a product printed by a 3D printer is monotonous and the end part of a material is difficult to accurately insert into a feeding pipe, the invention provides a multifunctional 3D printer and a printing material thereof.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a multifunctional 3D printer, which comprises a workbench; an X-axis guide rail, a Y-axis guide rail, a Z-axis guide rail, a printing platform and a printing nozzle are arranged on the workbench; the upper end of the printing nozzle is provided with two feeding guide pipes, the lower end of each feeding guide pipe is provided with a Y-shaped hot melting pipe, two inlets at the upper end of each hot melting pipe are opposite to the lower end of each feeding guide pipe, the outer side wall of each hot melting pipe is provided with a heating block, and a feeding unit is arranged below each hot melting pipe; the feeding unit comprises a first motor and two gears; an output shaft of the first motor penetrates through the side wall of the printing nozzle and is fixedly connected with one gear, the two gears are meshed with each other, a printing material penetrates between the two gears, a feeding pipe is arranged below the two gears which are meshed with each other, and the feeding pipe is communicated with the hot melting nozzle; the hot melting extrusion forming of the two printing materials is realized through the matching of the feeding guide pipe, the hot melting pipe and the feeding unit; when the printing head is used, if a product with multiple colors is printed by a 3D printer, a printing material needs to be replaced in the printing process, so that the printing process is complicated, and therefore, two materials with different colors are adhered together by the printing nozzle, and a colored product is printed; insert the pay-off pipe with the different material of two kinds of colours in, during the material was managed through the hot melt, on the hot melt pipe was transmitted the material with the hot melt between the heat to the heating block on the hot melt pipe, make the material softened, then two kinds of materials are in the same place in the adhesion of hot melt pipe lower extreme, extrude together through two gears each other after that, last material is intraductal by gear propelling movement to the feed, melt and extrude through hot melt nozzle, hot melt nozzle extrudes the material that two kinds of colours intersect each other this moment, make the product that two kinds of colours intersect each other of printing out, richen the colour of printing the product, receive liking of people.

Preferably, a pushing unit is arranged between the lower port of the feeding guide pipe and the upper port of the hot melting pipe; each pushing unit comprises a second motor and two rollers; an output shaft of the second motor penetrates through the side wall of the printing nozzle and is fixedly connected with one roller, outer rings of the two rollers are attached to an outer ring of the printing material, and a layer of rubber ring is attached to the outer ring of the roller; the auxiliary feeding unit pushes the material into the hot melting spray head through the pushing unit; when the gear rotates to push the material, the gear pulls the material and pushes the material into the feeding pipe, if the material is pulled and broken by the gear, no material enters the hot melting pipe, and the 3D printer cannot continue to work; the gyro wheel rotates to rub and moves the material and carry in the hot-melt tube, and the rubber ring of gyro wheel outer lane increases the area of contact of gyro wheel and material simultaneously, increases the frictional force between gyro wheel and the material, prevents that the material from meeting to take place sliding friction between the gyro wheel to the material can smoothly get into in the hot-melt tube, and the gear can be smoothly with the material pull in the feed tube, avoids the emergence of material disconnection phenomenon.

Preferably, a telescopic unit is arranged on the roller; the telescopic unit is positioned on the rollers close to the left side wall and the right side wall of the printing nozzle and comprises a fixed rod and a connecting cylinder; one end of the connecting cylinder is hinged with the roller, the other end of the connecting cylinder is provided with a first groove, one end of the fixing rod is connected with the connecting cylinder through a spring arranged in the first groove, and the other end of the fixing rod is fixedly connected to the left side wall and the right side wall of the printing spray head; the telescopic unit is suitable for printing materials with different diameters; when the gyro wheel rotates to rub the material and move to the hot melt pipe intra-tube, if the diameter of material is less than the distance between the adjacent gyro wheel, the gyro wheel fails effectively to rub the extrusion material, lead to the gyro wheel can not rub the material and move to the hot melt pipe intra-tube, for this reason through settling the flexible unit on the gyro wheel near printing shower nozzle, spring extrusion connecting cylinder, the connecting cylinder is pushed the gyro wheel to adjacent gyro wheel, make the clearance between the gyro wheel reduce, when the material inserts between two adjacent gyro wheels, the gyro wheel can attached extrusion once more on the material, then the gyro wheel can effectively rub the material and move to the hot melt pipe intra-tube.

Preferably, a reserved cavity filled with glue is arranged at the bifurcation of the hot melting pipe, the upper end of the reserved cavity penetrates through the upper end face of the printing spray head, and the lower end outlet before reservation is communicated with the interior of the bifurcation of the hot melting pipe; the firmness between the two printing materials is further enhanced by the glue in the reserved cavity; the material is when the intraductal heating of hot melt, the material surface is heated and is melted, and the material is inside not melted, because the elasticity of material self, the material is when the hot melt pipe lower extreme meets, the mutual attached hot melt pipe lateral wall of material slides, and the material can not be attached together each other, lead to two kinds of materials before being extruded by the gear, two kinds of materials are not adhered together yet, fill the gap between two kinds of materials for this reason through glue, simultaneously with two kinds of material adhesion together, glue drips in the gap between two kinds of materials in the reservation intracavity, when the material entered the gear, the gear can the material extrusion once more, make two kinds of materials firmly adhere together, avoid material tip bifurcation to pass in the inlet pipe gets into hot melt shower nozzle, the joining of glue simultaneously, make the product of printing out more firm.

Preferably, the upper end of the hot melting pipe is in a horn shape, and the hot melting pipe is arranged in a semicircular shape from the circular shape of an inlet at the upper end to the branch part at the lower end; the printing material is hot-melted into an initial cylindrical shape by a hot melting pipe and is hot-melted into a semicircular shape; the material is originally cylindrical, and is line contact when attaching between two columniform, leads to bonding insecure between two kinds of materials, for this reason through with cylindrical material hot melt extrusion into half cylinder shape for line contact becomes the face contact between two kinds of materials, increases the contact surface between two kinds of materials, thereby strengthens the fastness between two kinds of materials.

Preferably, each gear outer ring is provided with a semicircular annular groove, and when the two gears are meshed, the two annular grooves surround to form a circular groove; extruding two printing materials into a cylindrical shape through an annular groove on the gear; when two kinds of materials stretch out from the hot melt pipe lower extreme, if two kinds of material edges are neat by the bonding, when the material tip is in inserting the inlet tube, the material can block in feed inlet department, offers the ring channel for this reason on the gear, after the material stretched into the ring channel, two kinds of materials were extruded by the ring channel, and the circular recess that two ring channels enclosed simultaneously extrudees two kinds of material edges neatly for two kinds of materials extrude into cylindrical shape, and the material tip of being convenient for inserts in the inlet tube.

A printing material is suitable for the multifunctional 3D printer, and is prepared from a photosensitive resin material, wherein the photosensitive resin material contains a thermoplastic elastomer, an antioxidant and a lubricant; and the glue in the reserved cavity is TPU plastic glue.

The invention has the technical effects and advantages that:

1. according to the multifunctional 3D printer and the printing material thereof, two materials with different colors are inserted into the feeding guide pipe, the two materials are adhered together at the lower end of the hot melting pipe, the two materials are mutually crossed in hot melting spraying, a product with the mutually crossed two colors is printed, and the color of the printed product is enriched; and the material is conveyed into the hot melting pipe by rubbing through the rotation of the roller, and meanwhile, the contact area between the roller and the material is increased by the rubber ring on the outer ring of the roller, the friction force between the roller and the material is increased, and the sliding friction of the material between the rollers is prevented.

2. According to the multifunctional 3D printer and the printing material thereof, the telescopic unit is arranged on the roller close to the printing nozzle, the spring extrudes the connecting cylinder, the connecting cylinder pushes the roller to the adjacent roller, so that the gap between the rollers is reduced, the rollers can be attached and extruded on the material, and then the rollers can effectively rub the material to move into the hot melt pipe; and the edges of the two materials are extruded neatly by the circular groove formed by the two annular grooves, so that the two materials are extruded into a cylindrical shape, and the end part of the material can be conveniently inserted into the feeding pipe.

Drawings

The invention is further described with reference to the following figures and embodiments.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of a print head according to the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a perspective view of a gear in the print head;

in the figure: the automatic printing device comprises a workbench 1, an X-axis guide rail 11, a Y-axis guide rail 12, a Z-axis guide rail 13, a printing platform 14, a printing spray head 2, a feeding guide pipe 21, a hot melting pipe 22, a heating block 221, a feeding pipe 23, a hot melting spray head 24, a reserved cavity 25, a feeding unit 3, a first motor 31, a gear 32, an annular groove 321, a pushing unit 4, a second motor 41, a roller 42, a rubber ring 421, a telescopic unit 5, a fixing rod 51, a connecting cylinder 52, a first groove 521 and a spring 522.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the following embodiments.

As shown in fig. 1 to 5, the multifunctional 3D printer according to the present invention includes a table 1; an X-axis guide rail 11, a Y-axis guide rail 12, a Z-axis guide rail 13, a printing platform 14 and a printing nozzle 2 are arranged on the workbench 1; the upper end of the printing nozzle 2 is provided with two feeding guide pipes 21, the lower end of each feeding guide pipe 21 is provided with a Y-shaped hot melting pipe 22, two inlets at the upper end of each hot melting pipe 22 are opposite to the lower end of each feeding guide pipe 21, the outer side wall of each hot melting pipe 22 is provided with a heating block 221, and a feeding unit 3 is arranged below each hot melting pipe 22; the feeding unit 3 comprises a first motor 31 and two gears 32; an output shaft of the first motor 31 penetrates through the side wall of the printing nozzle 2 and is fixedly connected with one gear 32, the two gears 32 are meshed with each other, printing materials penetrate through the two gears 32, a feeding pipe 23 is arranged below the two gears 32 which are meshed with each other, and the feeding pipe 23 is communicated with the hot melt nozzle 24; the hot melting extrusion forming of the two printing materials is realized through the matching among the feeding conduit 21, the hot melting pipe 22 and the feeding unit 3; when the printing head is used, if a product with multiple colors is printed by a 3D printer, printing materials need to be replaced in the printing process, so that the printing process is complicated, and therefore, two materials with different colors are adhered together by the printing nozzle 2, and colored products are printed; insert the material that two kinds of colours are different in the pay-off pipe 21, when the material is through hot melt pipe 22, heating block 221 on the hot melt pipe 22 transmits hot melt pipe 22 between the heat to the material, make the material softened, then two kinds of materials are in the same place in hot melt pipe 22 lower extreme adhesion, extrude each other through two gears 32 after that together, last material is pushed to the inlet pipe 23 in by gear 32, melt and extrude through hot melt nozzle 24, hot melt nozzle 24 extrudes the material that two kinds of colours intersect each other this moment, make the product that two kinds of colours intersect each other of printing out, richen the colour of printing the product, receive people's liking more deeply.

As a specific embodiment of the present invention, a pushing unit 4 is disposed between the lower port of the feeding conduit 21 and the upper port of the thermofussion pipe 22; each pushing unit 4 comprises a second motor 41 and two rollers 42; an output shaft of the second motor 41 penetrates through the side wall of the printing nozzle 2 and is fixedly connected with one roller 42, the outer rings of the two rollers 42 are attached to the outer ring of the printing material, and a layer of rubber ring 421 is attached to the outer ring of the roller 42; the auxiliary feeding unit 3 pushes the material into the hot melt nozzle 24 by the pushing unit 4; when the gear 32 rotates to push the material, the gear 32 pulls the material and pushes the material into the feeding pipe 23, and when the material is pulled by the gear 32 and is broken by pulling, no material enters the hot melting pipe 22 any more, which will result in that the 3D printer cannot continue to work, so that the pushing unit 4 is arranged at the inlet end of the hot melting pipe 22, so that the material is pushed into the hot melting pipe 22 at one side, and the gear 32 rotates to pull the material into the feeding pipe 23; the roller 42 rotates to rub the material to be conveyed into the hot melt pipe 22, meanwhile, the rubber ring 421 on the outer ring of the roller 42 increases the contact area between the roller 42 and the material, increases the friction force between the roller 42 and the material, prevents the material from sliding friction between the roller 42 and the material, so that the material can smoothly enter the hot melt pipe 22, and the gear 32 can smoothly drag the material into the feeding pipe 23 to avoid the occurrence of the material disconnection phenomenon.

As a specific embodiment of the present invention, a telescopic unit 5 is provided on the roller 42; the telescopic unit 5 is positioned on the rollers 42 close to the left side wall and the right side wall of the printing nozzle 2, and the telescopic unit 5 comprises a fixed rod 51 and a connecting cylinder 52; one end of the connecting cylinder 52 is hinged with the roller 42, the other end of the connecting cylinder 52 is provided with a first groove 521, one end of the fixing rod 51 is connected with the connecting cylinder 52 through a spring 522 arranged in the first groove 521, and the other end of the fixing rod 51 is fixedly connected to the left side wall and the right side wall of the printing spray head 2; the telescopic unit 5 is suitable for printing materials with different diameters; when the roller 42 rotates to rub the material to move into the hot melt pipe 22, if the diameter of the material is smaller than the distance between the adjacent rollers 42, the roller 42 cannot rub and extrude the material effectively, so that the roller 42 cannot rub and extrude the material to move into the hot melt pipe 22, for this reason, by arranging the telescopic unit 5 on the roller 42 close to the printing nozzle 2, the spring 522 extrudes the connecting cylinder 52, the connecting cylinder 52 pushes the roller 42 to the adjacent roller 42, so that the gap between the rollers 42 is reduced, when the material is inserted between the two adjacent rollers 42, the roller 42 can be attached and extruded on the material again, and then the roller 42 can rub and extrude the material effectively to move into the hot melt pipe 22.

As a specific embodiment of the present invention, a pre-reserved cavity 25 filled with glue is disposed at a bifurcation of the hot melt tube 22, an upper end of the pre-reserved cavity 25 passes through an upper end surface of the print head 2, and a lower end outlet before pre-reservation is communicated with an interior of the bifurcation of the hot melt tube 22; the firmness between the two printing materials is further enhanced by the glue in the reserved cavity 25; when the material is heated in the hot melt pipe 22, the surface of the material is heated and melted, the material is not melted inside, due to the elasticity of the material, when the material meets the lower end of the hot melt pipe 22, the side walls of the hot melt pipe 22 attached to each other are slid, the material is not attached to each other, two materials are not adhered together before being extruded by the gear 32, the gap between the two materials is filled with glue, the two materials are adhered together, the glue in the reserved cavity 25 is dripped into the gap between the two materials, when the material passes through the gear 32, the gear 32 can be extruded with the material again, so that the two materials are firmly adhered together, the phenomenon that the end part of the material is forked and cannot pass through the feeding pipe 23 to enter the spray head 24 is avoided, meanwhile, the glue is added, and the printed product is firmer.

As a specific embodiment of the present invention, the upper end of the thermal melting tube 22 is in a horn shape, and the thermal melting tube 22 is arranged in a semicircular shape from the circular shape of the inlet at the upper end to the branch at the lower end; the printing material is hot-melted into an initial cylindrical shape by the hot-melting pipe 22 to be hot-melted into a semicircular shape; the material is originally cylindrical, and is line contact when attaching between two columniform, leads to bonding insecure between two kinds of materials, for this reason through with cylindrical material hot melt extrusion into half cylinder shape for line contact becomes the face contact between two kinds of materials, increases the contact surface between two kinds of materials, thereby strengthens the fastness between two kinds of materials.

As a specific embodiment of the present invention: a semicircular annular groove 321 is formed in the outer ring of each gear 32, and when the two gears 32 are meshed, the two annular grooves 321 surround to form a circular groove; the two printing materials are extruded into a cylindrical shape through the annular groove 321 on the gear 32; when two kinds of materials stretch out from hot melt pipe 22 lower extreme, if two kinds of material edges are neat by the bonding, when the material tip is inserting into inlet pipe 23, the material can block in feed inlet department, offers ring channel 321 on gear 32 for this reason, after the material stretched into ring channel 321, two kinds of materials were extruded by ring channel 321, and the circular recess that two ring channels 321 enclosed extrudees two kinds of material edges neat simultaneously for two kinds of materials extrude into cylindrical shape, be convenient for the material tip insert in the inlet pipe 23.

A printing material is suitable for the multifunctional 3D printer, and is prepared from a photosensitive resin material, wherein the photosensitive resin material contains a thermoplastic elastomer, an antioxidant and a lubricant; and the glue in the reserved cavity 25 is TPU plastic glue.

When the printing head is used, if a product with multiple colors is printed by a 3D printer, printing materials need to be replaced in the printing process, so that the printing process is complicated, and therefore, two materials with different colors are adhered together by the printing nozzle 2, and colored products are printed; two materials with different colors are inserted into the feeding guide pipe 21, when the materials pass through the hot melting pipe 22, the heating block 221 on the hot melting pipe 22 transfers the heat to the materials, so that the materials are softened, then the two materials are adhered together at the lower end of the hot melting pipe 22, then the two materials are mutually extruded together through the two gears 32, finally the materials are pushed into the feeding pipe 23 by the gears 32, and are melted and extruded through the hot melting nozzle 24, at the moment, the hot melting nozzle 24 extrudes the materials with the two colors intersecting with each other, so that the products with the two colors intersecting with each other are printed, the colors of the printed products are enriched, and the printed products are more popular with people; when the gear 32 rotates to push the material, the gear 32 pulls the material and pushes the material into the feeding pipe 23, and when the material is pulled by the gear 32 and is broken by pulling, no material enters the hot melting pipe 22 any more, which will result in that the 3D printer cannot continue to work, so that the pushing unit 4 is arranged at the inlet end of the hot melting pipe 22, so that the material is pushed into the hot melting pipe 22 at one side, and the gear 32 rotates to pull the material into the feeding pipe 23; the roller 42 rotates to rub the material to be conveyed into the hot melting pipe 22, meanwhile, the rubber ring 421 on the outer ring of the roller 42 increases the contact area between the roller 42 and the material, increases the friction force between the roller 42 and the material, prevents the material from sliding friction between the roller 42 and the material, so that the material can smoothly enter the hot melting pipe 22, and the gear 32 can smoothly pull the material into the feeding pipe 23, thereby avoiding the occurrence of material breaking; when the roller 42 rotates to rub the material to move into the hot melt pipe 22, if the diameter of the material is smaller than the distance between the adjacent rollers 42, the roller 42 cannot rub and extrude the material effectively, so that the roller 42 cannot rub and extrude the material to move into the hot melt pipe 22, for this reason, by arranging the telescopic unit 5 on the roller 42 close to the printing nozzle 2, the spring 522 extrudes the connecting cylinder 52, the connecting cylinder 52 pushes the roller 42 to the adjacent roller 42, so that the gap between the rollers 42 is reduced, when the material is inserted between the two adjacent rollers 42, the roller 42 can be attached and extruded on the material again, and then the roller 42 can rub and extrude the material effectively to move into the hot melt pipe 22; when the materials are heated in the hot melting pipe 22, the surfaces of the materials are heated and melted, the materials are not melted in the materials, due to the elasticity of the materials, when the materials meet at the lower end of the hot melting pipe 22, the materials are attached to the side walls of the hot melting pipe 22 to slide, but the materials are not attached to each other, so that the two materials are not adhered together before being extruded by the gear 32, gaps between the two materials are filled with glue, the two materials are adhered together, the glue in the reserved cavity 25 is dripped into the gaps between the two materials, when the materials enter the gear 32, the gear 32 can extrude the materials again, so that the two materials are firmly adhered together, the phenomenon that the bifurcations of the end parts of the materials cannot penetrate through the feeding pipe 23 to enter the spray head 24 is avoided, and meanwhile, the addition of the glue enables printed products; the material is initially cylindrical, and the two cylinders are in line contact when being attached, so that the two materials are not firmly bonded, and therefore, the cylindrical material is hot-melted and extruded into a semi-cylindrical shape, so that the line contact between the two materials is changed into surface contact, the contact surface between the two materials is increased, and the firmness between the two materials is enhanced; when two kinds of materials stretch out from hot melt pipe 22 lower extreme, if two kinds of material edges are neat by the bonding, when the material tip is inserting into inlet pipe 23, the material can block in feed inlet department, offers ring channel 321 on gear 32 for this reason, after the material stretched into ring channel 321, two kinds of materials were extruded by ring channel 321, and the circular recess that two ring channels 321 enclosed extrudees two kinds of material edges neat simultaneously for two kinds of materials extrude into cylindrical shape, be convenient for the material tip insert in the inlet pipe 23.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A multifunctional 3D printer comprising a table (1); an X-axis guide rail (11), a Y-axis guide rail (12), a Z-axis guide rail (13), a printing platform (14) and a printing nozzle (2) are arranged on the workbench (1); the method is characterized in that: the upper end of the printing nozzle (2) is provided with two feeding guide pipes (21), the lower end of each feeding guide pipe (21) is provided with a Y-shaped hot melting pipe (22), two inlets at the upper end of each hot melting pipe (22) are opposite to the lower end of each feeding guide pipe (21), the outer side wall of each hot melting pipe (22) is provided with a heating block (221), and a feeding unit (3) is arranged below each hot melting pipe (22); the feeding unit (3) comprises a first motor (31) and two gears (32); an output shaft of the first motor (31) penetrates through the side wall of the printing nozzle (2) and is fixedly connected with one gear (32), the two gears (32) are meshed with each other, a printing material penetrates between the two gears (32), a feeding pipe (23) is arranged below the two gears (32) which are meshed with each other, and the feeding pipe (23) is communicated with the hot melting nozzle (24); the hot melting extrusion forming of the two printing materials is realized through the matching among the feeding conduit (21), the hot melting pipe (22) and the feeding unit (3).

2. The multifunctional 3D printer according to claim 1, characterized in that: a pushing unit (4) is arranged between the lower port of the feeding guide pipe (21) and the upper port of the hot melting pipe (22); each pushing unit (4) comprises a second motor (41) and two rollers (42); an output shaft of the second motor (41) penetrates through the side wall of the printing nozzle (2) and is fixedly connected with one roller (42), the outer rings of the two rollers (42) are attached to the outer ring of the printing material, and a layer of rubber ring (421) is attached to the outer ring of the roller (42); the auxiliary feed unit (3) pushes the material into the hot melt nozzle (24) by means of the push unit (4).

3. The multifunctional 3D printer according to claim 2, characterized in that: the roller (42) is provided with a telescopic unit (5); the telescopic unit (5) is positioned on the rollers (42) close to the left side wall and the right side wall of the printing spray head (2), and the telescopic unit (5) comprises a fixed rod (51) and a connecting cylinder (52); one end of the connecting cylinder (52) is hinged with the roller (42), the other end of the connecting cylinder (52) is provided with a first groove (521), one end of the fixing rod (51) is connected with the connecting cylinder (52) through a spring (522) arranged in the first groove (521), and the other end of the fixing rod (51) is fixedly connected to the left side wall and the right side wall of the printing spray head (2); the telescopic unit (5) is suitable for printing materials with different diameters.

4. The multifunctional 3D printer according to claim 3, characterized in that: a reserved cavity (25) filled with glue is arranged at the bifurcation of the hot melting pipe (22), the upper end of the reserved cavity (25) penetrates through the upper end face of the printing spray head (2), and the lower end outlet before reservation is communicated with the interior of the bifurcation of the hot melting pipe (22); the firmness between the two printing materials is further enhanced by the glue in the reserved cavity (25).

5. The multifunctional 3D printer according to claim 4, characterized in that: the upper end of the hot melting pipe (22) is in a horn shape, and the hot melting pipe (22) is arranged in a semicircular shape from the circular shape of an inlet at the upper end to the branch position at the lower end; the printing material is thermally fused into an initial cylindrical shape into a semicircular shape by a thermal fusion pipe (22).

6. The multifunctional 3D printer according to claim 5, characterized in that: a semicircular annular groove (321) is formed in the outer ring of each gear (32), and when the two gears (32) are meshed, the two annular grooves (321) form a circular groove in a surrounding mode; the two printing materials are extruded into a cylindrical shape through an annular groove (321) on the gear (32).

7. A printed material, characterized by: the printing material is suitable for the multifunctional 3D printer in any one of claims 1-6, and is made of a photosensitive resin material, and the photosensitive resin material contains a thermoplastic elastomer, an antioxidant and a lubricant; and the glue in the reserved cavity (25) is TPU plastic glue.