Mixing spray head for 3D printing wires

Abstract

The utility model discloses a mixing nozzle for 3D printing wires, belongs to the technical field of 3D printing, and aims to solve the problems that the mixing effect is poor due to uneven feeding of the mixing nozzle, and blockage is easily caused after materials attached to the inner wall of the mixing nozzle are cooled, the mixing nozzle comprises a charging barrel, and one side of the top end of the charging barrel is fixedly connected with a supporting frame; a mixing box is fixedly connected to the top face of the supporting frame, a mixing mechanism is arranged in the mixing box, and a discharging assembly is arranged in the charging barrel. According to the utility model, two kinds of wires synchronously enter the mixing box, the electric heating rod melts the two kinds of wires, the stirring rod rotates to uniformly mix the melted wires, the mixed materials enter the material pipe through the communicating pipe, and the spiral blade rotates to pressurize the mixed materials, so that the materials are uniformly mixed. The scraping plate rotates to scrape off materials attached to the inner wall of the charging barrel, and the materials are sprayed out through the spray head, so that the problems that the mixing effect is poor due to uneven feeding of the mixing spray head, and blockage is easily caused after the materials attached to the inner wall of the mixing spray head are cooled are effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to 3D printing technical field, concretely relates to a kind of mixed spray head for 3D printing wire rod. BACKGROUND

[0002] 3D printing is a kind of technology based on digital model file, using powder-like metal or plastic and other adhesive materials, to construct objects by layer printing;The consumables of 3D printer usually have PLA, ABS, photosensitive resin, wax-based material, nylon powder, gypsum powder, metal powder and other materials, different 3D printers use different materials for printing;Mixed spray head is a kind of equipment that mixes multiple materials to make products have multiple functional properties.

[0003] In the prior art, the patent with the patent announcement number CN210706078U is a 3D printer nozzle based on mixed raw materials, the above-mentioned patent includes a nozzle body, a raw material channel is arranged inside the nozzle body, the raw material channel is sequentially divided into a mixing section, a heating section and an extrusion section from top to bottom, a plurality of feed channels are formed on the nozzle body at the mixing section, a mixing pipe with a closed top is arranged in the mixing section, the outer diameter of the mixing pipe is the same as the diameter of the mixing section, a feed hole corresponding to the feed channel is formed on the wall of the mixing pipe, a stirring shaft with a plurality of blades is arranged inside the mixing pipe, the top of the stirring shaft is fixed to the center of the top wall of the mixing pipe, the center of the top of the mixing pipe is connected to the output end of the servo motor arranged on the nozzle body, and an electric heating layer is embedded on the nozzle body corresponding to the heating section, but the following problems still exist in actual use: most of the mixed printing nozzles add materials into the nozzle through different feed ports, due to the unevenness of the feed side, it is easy to cause poor mixing uniformity, and the material after liquidization is very easy to adhere to the inner wall of the nozzle, and after cooling and solidification, it is easy to cause nozzle blockage, affecting the normal use of the nozzle and reducing the printing efficiency.

[0004] Therefore, a mixed spray head for 3D printing wire rod is needed to solve the problem of poor mixing effect caused by uneven feeding of the mixed spray head in the prior art, and the material adhered to the inner wall of the mixed spray head is easy to cause blockage after cooling. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a mixed spray head for 3D printing wire rod to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of mixing spray head for 3D printing wire, including barrel, the top side of barrel top is fixedly connected with support frame, the top surface of support frame is fixedly connected with mixing box, the top of barrel is fixedly connected with mounting seat, the top surface of mounting seat is fixedly connected with motor, motor output end coaxially fixedly connected with driving bevel gear, the top of barrel and the bottom end of mixing box are fixedly connected with communication pipe, the inside of mixing box is provided with mixing mechanism, the inside of barrel is provided with discharging assembly;

[0007] The mixing mechanism includes an electric heating rod and a first shaft, the electric heating rod is fixedly connected between the top and bottom surfaces of the mixing box interior, the first shaft top end is rotatably connected to the center of the mixing box interior top end, the first shaft bottom end rotatably penetrates the mixing box bottom end and is coaxially fixedly connected with a first driven bevel gear, the first driven bevel gear is meshingly connected with the driving bevel gear, a plurality of uniformly distributed stirring rods are fixedly connected to the first shaft outer surface inside the mixing box.

[0008] In the scheme, it is necessary to explain that the discharging assembly includes a bearing seat, the bearing seat bottom end is fixedly connected with the barrel top center, a second shaft is rotatably connected in the bearing seat, the second shaft top end is coaxially fixedly connected with a second driven bevel gear, the second driven bevel gear is meshingly connected with the driving bevel gear, the second shaft bottom end rotatably penetrates the barrel top end and extends into the barrel interior, a helical blade is tightly sleeved on the second shaft outer surface inside the barrel, connecting rods are fixedly connected to the second shaft outer surface bottom two sides inside the barrel, a scraper is fixedly connected to the side wall away from the second shaft of the connecting rod, and the side wall away from the connecting rod of the scraper is attached to the barrel inner surface.

[0009] It is further worth mentioning that a plurality of uniformly distributed heat dissipation fins are mounted on the outer surface of the barrel, and a nozzle is movably communicated with the barrel bottom end through threads.

[0010] It is further necessary to mention that a first feeding pipe is fixedly communicated with one side of the outer surface of the mixing box, and a second feeding pipe is fixedly communicated with one side of the outer surface of the mixing box.

[0011] As a preferred embodiment, the first feeding pipe and the second feeding pipe are located on the same side, and the second feeding pipe is located directly below the first feeding pipe.

[0012] As a preferred embodiment, the electric heating rod, the first feeding pipe and the second feeding pipe are located on the same axis, and the side close to the barrel of the scraper is provided with a pointed end.

[0013] Compared with the prior art, the mixing spray head for 3D printing wire provided by the utility model has at least the following beneficial effects:

[0014] (1) Through the cooperation of the motor and the mixing mechanism, the two wires enter the mixing box synchronously, the electric heating rod melts the two wires, the motor drives the first rotating shaft to drive the stirring rod to rotate, and the molten wires are uniformly mixed, thereby effectively avoiding the problem of poor mixing effect caused by uneven feeding of the mixing nozzle.

[0015] (2) Through the cooperation of the motor and the discharge assembly, the mixed material enters the inside of the material pipe through the communication pipe, under the action of the bearing seat, the motor drives the second rotating shaft to drive the spiral blade to rotate, and the mixed material is pressurized, and at the same time, the motor drives the scraper to rotate through the connecting rod, and the material adhered to the inner wall of the barrel is scraped off and sprayed out through the nozzle, thereby effectively avoiding the problem that the material adhered to the inner wall of the mixing nozzle is easily blocked after cooling. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the top end of the barrel and the bottom end of the mixing box;

[0018] Figure 3 It is a schematic diagram of the front view cross-sectional structure of the mixing box;

[0019] Figure 4 It is a schematic diagram of the front view cross-sectional structure of the barrel.

[0020] In the figure: 1, barrel; 2, support frame; 3, mixing box; 4, mounting seat; 5, motor; 6, driving bevel gear; 7, communication pipe; 8, mixing mechanism; 81, electric heating rod; 82, first rotating shaft; 83, first driven bevel gear; 84, stirring rod; 9, discharge assembly; 91, bearing seat; 92, second rotating shaft; 93, second driven bevel gear; 94, spiral blade; 95, connecting rod; 96, scraper; 10, heat dissipation fin plate; 11, nozzle; 12, first feeding pipe; 13, second feeding pipe. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with examples.

[0022] Please refer to Figures 1-4The utility model provides a kind of for 3D printing wire rod's mixed spray head, including barrel 1, barrel 1 top end one side fixedly connected with support frame 2, support frame 2 top surface fixedly connected with mixing box 3, barrel 1 top end fixedly connected with mounting seat 4, mounting seat 4 top surface fixedly connected with motor 5, motor 5 output end coaxially fixedly connected with driving bevel gear 6, barrel 1 top end and mixing box 3 bottom end between fixed communication have communication pipe 7, mixing box 3 inside is provided with mixing mechanism 8, barrel 1 inside is provided with discharge assembly 9;

[0023] Mixing mechanism 8 includes electric heating rod 81 and first shaft 82, electric heating rod 81 is fixedly connected between the inside top surface and bottom surface of mixing box 3, first shaft 82 top end is rotatably connected with the inside top end center of mixing box 3, first shaft 82 bottom end rotatably penetrates the bottom end of mixing box 3 and coaxially fixedly connected with first driven bevel gear 83, first driven bevel gear 83 is meshingly connected with driving bevel gear 6, a plurality of stirring rods 84 evenly distributed are fixedly connected on the outer surface of first shaft 82 inside mixing box 3.

[0024] Further as Figure 2 And Figure 4 Illustrated, worth specifically explained is that discharge assembly 9 includes bearing seat 91, bearing seat 91 bottom end is fixedly connected with the top end center of barrel 1, second shaft 92 is rotatably connected in bearing seat 91, second shaft 92 top end coaxially fixedly connected with second driven bevel gear 93, second driven bevel gear 93 is meshingly connected with driving bevel gear 6, second shaft 92 bottom end rotatably penetrates the top end of barrel 1 and extends to the inside of barrel 1, the outer surface of second shaft 92 inside barrel 1 is tightly sleeved with helical blade 94, the outer surface bottom of second shaft 92 inside barrel 1 is fixedly connected with connecting rod 95 on both sides, connecting rod 95 is fixedly connected with scraper 96 on the outer wall of one side away from second shaft 92, the outer wall of one side away from connecting rod 95 of scraper 96 is attached with the inner surface of barrel 1.

[0025] Further as Figure 1 、 Figure 2 And Figure 4 Illustrated, worth specifically explained is that the outer surface of barrel 1 is mounted with a plurality of evenly distributed heat dissipation fin plates 10, and the bottom end of barrel 1 is movably communicated with nozzle 11 by screw thread.

[0026] Further as Figure 1 And Figure 3 Illustrated, worth specifically explained is that the outer surface one side of mixing box 3 is fixedly communicated with first feeding pipe 12, and the outer surface one side of mixing box 3 is fixedly communicated with second feeding pipe 13.

[0027] Further as Figure 1 And Figure 3As shown, it is worth noting that the first feeding pipe 12 and the second feeding pipe 13 are located on the same side, and the second feeding pipe 13 is located directly below the first feeding pipe 12, which facilitates the introduction of different wires into the mixing box 3.

[0028] Further as Figure 3 and Figure 4 As shown, it is worth noting that the electric heating rod 81 is located on the same axis as the first feeding pipe 12 and the second feeding pipe 13, which facilitates simultaneous heating of different wires, and the scraper 96 is provided with a sharp end on the side close to the barrel 1, which facilitates scraping of the liquid wire on the inner wall of the barrel 1.

[0029] In summary: when the mixing nozzle is in use, first, the electric heating rod 81 is preheated, then two different wires are introduced into the mixing box 3 through the first feeding pipe 12 and the second feeding pipe 13, and the motor 5 is turned on at the same time. After the two wires come into contact with the electric heating rod 81, they melt into liquid. The motor 5 rotates to drive the driving bevel gear 6 to rotate, which in turn drives the first driven bevel gear 83 to rotate under the action of meshing connection, and then drives the first shaft 82 to rotate synchronously. When the first shaft 82 rotates, it drives the plurality of stirring rods 84 to rotate inside the mixing box 3, which stirs the melted wire and realizes uniform mixing of the two wires, effectively avoiding the problem of poor mixing effect caused by uneven feeding of the mixing nozzle.

[0030] The mixed liquid wire enters the barrel 1 through the communication pipe 7, and the rotating driving bevel gear 6 drives the second driven bevel gear 93 to rotate, which in turn drives the second shaft 92 to rotate under the action of the bearing seat 91. When the second shaft 92 rotates, it drives the spiral blade 94 to rotate synchronously. The spiral blade 94 pressurizes the mixed liquid wire, and at the same time, the second shaft 92 rotates to drive the scraper 96 to rotate through the connecting rod 95. The scraper 96 scrapes off the liquid wire attached to the inner surface of the barrel 1, and the mixed liquid wire is sprayed out of the nozzle 11 for printing work, effectively avoiding the problem of blockage caused by the attachment of materials to the inner wall of the mixing nozzle.

[0031] The motor 5 and the electric heating rod 81 can be purchased on the market, and the motor 5 and the electric heating rod 81 are provided with a power supply, which belongs to mature technology in the field and has been fully disclosed, so the specification does not repeat the description.

[0032] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application have been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. A mixing nozzle for 3D printing wire, comprising a cartridge (1), characterized in that: The top end of the barrel (1) is fixedly connected with a support frame (2), the top surface of the support frame (2) is fixedly connected with a mixing box (3), the top end of the barrel (1) is fixedly connected with a mounting seat (4), the top surface of the mounting seat (4) is fixedly connected with a motor (5), the output end of the motor (5) is coaxially fixedly connected with a driving bevel gear (6), the top end of the barrel (1) and the bottom end of the mixing box (3) are fixedly and communicatively connected with a communication pipe (7), the inside of the mixing box (3) is provided with a mixing mechanism (8), and the inside of the barrel (1) is provided with a discharging assembly (9). The mixing mechanism (8) comprises an electric heating rod (81) and a first rotating shaft (82), the electric heating rod (81) is fixedly connected between the top surface and the bottom surface in the inside of the mixing box (3), the top end of the first rotating shaft (82) is rotatably connected with the top end center in the inside of the mixing box (3), the bottom end of the first rotating shaft (82) is rotatably penetrated through the bottom end of the mixing box (3) and coaxially fixedly connected with a first driven bevel gear (83), the first driven bevel gear (83) is meshingly connected with the driving bevel gear (6), and a plurality of stirring rods (84) uniformly distributed are fixedly connected to the outer surface of the first rotating shaft (82) in the inside of the mixing box (3).

2. The mixing nozzle for 3D printing filament according to claim 1, characterized in that: The discharging assembly (9) comprises a bearing seat (91), the bottom end of the bearing seat (91) is fixedly connected with the top end center of the barrel (1), the bearing seat (91) is rotatably connected with a second rotating shaft (92) in the inside, the top end of the second rotating shaft (92) is coaxially fixedly connected with a second driven bevel gear (93), the second driven bevel gear (93) is meshingly connected with the driving bevel gear (6), the bottom end of the second rotating shaft (92) is rotatably penetrated through the top end of the barrel (1) and extends to the inside of the barrel (1), a helical blade (94) is tightly sleeved on the outer surface of the second rotating shaft (92) in the inside of the barrel (1), connecting rods (95) are fixedly connected to the outer surface of the second rotating shaft (92) on both sides of the bottom end in the inside of the barrel (1), scraper plates (96) are fixedly connected to the outer walls of the sides, away from the second rotating shaft (92), of the connecting rods (95), and the outer walls of the sides, away from the connecting rods (95), of the scraper plates (96) are attached to the inner surface of the barrel (1).

3. The mixing nozzle for 3D printing filament according to claim 2, characterized in that: A plurality of heat dissipation fin plates (10) are uniformly distributed on the outer surface of the barrel (1), and a nozzle (11) is movably connected to the bottom end of the barrel (1) through threads.

4. The mixing nozzle for 3D printing filament according to claim 3, wherein: A first feeding pipe (12) is fixedly and communicatively connected to one side of the outer surface of the mixing box (3), and a second feeding pipe (13) is fixedly and communicatively connected to one side of the outer surface of the mixing box (3).

5. The mixing nozzle for 3D printing filament according to claim 4, characterized in that: The first feeding pipe (12) and the second feeding pipe (13) are located on the same side, and the second feeding pipe (13) is located directly below the first feeding pipe (12).

6. The mixing nozzle for 3D printing filament of claim 2, wherein: The electric heating rod (81), the first feeding pipe (12) and the second feeding pipe (13) are located on the same axis, and the side, close to the barrel (1), of the scraper plate (96) is provided with a pointed end.

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