Extrusion mechanism for 3D printing

Abstract

The utility model discloses an extrusion mechanism for 3D printing, and relates to the technical field of FDM type 3D printers, the extrusion mechanism comprises a discharge port, a cooling mechanism is arranged on the top surface of the discharge port, a fixing mechanism is arranged on the top surface of the cooling mechanism, a discharge mechanism is arranged in the fixing mechanism, the cooling mechanism comprises a bottom plate, and the bottom plate is arranged on the bottom plate. The bottom plate is fixedly connected to the top surface of the discharge port, two side plates are fixedly connected to the side surface of the bottom plate, a cross beam is fixedly connected to one ends of the side surfaces of the two side plates, and a top plate is fixedly connected to the side top surfaces of the two side plates. The cooling mechanism, the bottom plate, the side plates, the top plate, the cross rod, the motor, the fan and the water cooling mechanism are matched, cold water is pumped into the cold water pipe from the cold water tank through the water pump, the cold water pipe is wound on the discharging pipe, the fan cools the discharging pipe and the cold water pipe at the same time, and cold water in the cold water pipe returns to the cold water tank through the water inlet pipe. And the use adaptability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of FDM type 3D printers, in particular to an extrusion mechanism for 3D printing. Background Art

[0002] The FDM 3D printer was successfully developed by American scholars in 1988. The materials of FDM are generally thermoplastic materials, such as wax, ABS, nylon, etc. The materials are fed in filament form. The materials are heated and melted in the nozzle, and the nozzle moves along the cross-sectional contour and filling trajectory of the part, while extruding the molten material, and the material solidifies quickly and condenses with the surrounding materials.

[0003] Patent publication number CN117507294A discloses a liquid-cooled hydraulic extruder mechanism and printer, including an assembly shell structure, the assembly shell structure has a sealed assembly inner cavity, and the assembly shell structure is provided with a liquid inlet end and a liquid outlet end respectively connected to the sealed assembly inner cavity.

[0004] In order to solve the problem in the prior art that the performance of the 3D printer extrusion mechanism is limited when the extrusion mechanism is driven by a motor and cooled by air, the prior art uses a liquid-cooled hydraulic extrusion mechanism to replace the extrusion mechanism driven by a motor and cooled by air. However, the liquid-cooled hydraulic extrusion mechanism may not be cooled in place or in time, which may lead to the problem of limited performance of the extrusion mechanism. Utility Model Content

[0005] The purpose of the utility model is to provide an extrusion mechanism for 3D printing to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A 3D printing extrusion mechanism comprises a discharge port, a top surface of the discharge port is provided with a cooling mechanism, a top surface of the cooling mechanism is provided with a fixing mechanism, and a discharge mechanism is provided inside the fixing mechanism.

[0008] The cooling mechanism includes a bottom plate, which is fixedly connected to the top surface of the discharge port. The sides of the bottom plate are fixedly connected to side plates. There are two side plates, one end of the sides of the two side plates is fixedly connected to a cross beam, and the side top surfaces of the two side plates are fixedly connected to a top plate.

[0009] A further improvement of the technical solution of the utility model is that a hole is opened in the middle of the side panel, a cross bar is fixedly connected in the hole of the side panel, a motor is fixedly connected to the side of the cross bar, a fan is fixedly connected to the output shaft of the motor, and a water cooling mechanism is fixedly connected to one end of the side panel.

[0010] By adopting the above technical solution, the fan is driven to rotate by the motor fixedly connected to the cross bar to perform preliminary cooling of the extrusion mechanism.

[0011] A further improvement of the technical solution of the utility model is that the water cooling mechanism includes a cold water tank, the cold water tank is fixedly connected to one end of the side plate, a water pump is fixedly connected to the bottom of the side of the cold water tank, the output end of the water pump is fixedly connected to a water outlet pipe, one end of the water outlet pipe is fixedly connected to the cold water pipe, the other end of the cold water pipe is fixedly connected to a water inlet pipe, and the water inlet pipe is fixedly connected to the top of the side of the cold water tank.

[0012] By adopting the above technical solution, the extrusion mechanism is further cooled by winding the cold water pipe around the surface of the discharge pipe. At the same time, the fan will also cool the water in the cold water pipe, and the cooled water will be returned to the cold water tank under the action of the water pump.

[0013] A further improvement of the technical solution of the utility model is that: the fixing mechanism includes a fixing plate, the fixing plate is fixedly connected to the top surface of the top plate, the bottom surface of the fixing plate is fixedly connected with a discharge pipe, the discharge pipe passes through the cooling mechanism and is fixedly connected to the discharge port, a slot is provided on the side surface of the fixing plate, and a buckle is movably connected in the hole of the fixing plate.

[0014] By adopting the above technical solution, the cooling mechanism is fixed to the bottom surface of the fixing mechanism through the top plate, so that the cooling mechanism can be easily dismantled and replaced when damaged.

[0015] A further improvement of the technical solution of the utility model is that: a buckle rod is fixedly connected to the side surface of the buckle, a toothed rod is fixedly connected to the side surface of the buckle rod, a limiting block is fixedly connected to the bottom surface of the toothed rod, and a rotating rod is meshed with the top surface of the toothed rod.

[0016] By adopting the above technical solution, the distance between the two buckle rods can be adjusted by rotating the rotating rod, so that the buckle can be fixed in the slot or detached from the slot.

[0017] A further improvement of the technical solution of the utility model is that the discharging mechanism includes a shell, the shell is movably connected to the inside of the fixed plate, the surface of the shell is provided with a card slot, the card slot is engaged with the surface of the buckle, the side of the shell is fixedly connected with a fixing buckle, the side of the fixing buckle is provided with a rotating rod hole, and the rotating rod is movably connected to the inside of the fixing buckle.

[0018] By adopting the above technical solution, the discharge mechanism can be stably connected to the fixing mechanism through the combination of the buckle and the slot, and can be replaced promptly and timely when there is a problem with the cooling mechanism or the discharge port.

[0019] A further improvement of the technical solution of the utility model is that: a pillar is fixedly connected to the top surface of the shell, a limit rod is fixedly connected to the surface of the shell, and a feed port is fixedly connected to the side surface of the shell.

[0020] By adopting the above technical solution, the limit rod is connected to the printer body through the support, and the limit rod can keep the extrusion mechanism stable during use.

[0021] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0022] 1. The utility model provides an extrusion mechanism for 3D printing, which adopts the cooperation of a cooling mechanism, a bottom plate, a side plate, a top plate, a cross bar, a motor, a fan, and a water cooling mechanism. Cold water is pumped from a cold water tank into a cold water pipe through a water pump. The cold water pipe is wound around a discharge pipe. The fan cools down the discharge pipe and the cold water pipe at the same time. The cold water in the cold water pipe returns to the cold water tank through a water inlet pipe, thereby improving the adaptability of the device.

[0023] 2. The utility model provides an extrusion mechanism for 3D printing, which adopts the cooperation of a fixing mechanism, a fixing plate, a buckle, a buckle rod, a toothed rod, a limit block, a rotating rod, a shell, a slot, and a fixing buckle. The distance between the two buckle rods can be adjusted by rotating the rotating rod, so that the buckle can be fixed in the slot or detached from the slot, thereby fixing or disassembling the fixing device. Through the device, when there is a problem with the cooling mechanism or the discharge port, it can be replaced in time, thereby improving the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the cooling mechanism of the utility model;

[0026] Figure 3 It is a structural schematic diagram of the water cooling mechanism of the utility model;

[0027] Figure 4 It is a structural schematic diagram of the fixing mechanism of the utility model;

[0028] Figure 5 It is a structural schematic diagram of the discharging mechanism of the utility model.

[0029] In the figure: 1. discharge mechanism; 11. support; 12. limit rod; 13. shell; 14. slot; 15. fixing buckle; 16. feed port; 2. fixing mechanism; 21. fixing plate; 22. buckle; 23. buckle rod; 24. toothed rod; 25. rotating rod; 26. limit block; 27. discharge pipe; 3. discharge port; 4. cooling mechanism; 41. bottom plate; 42. top plate; 43. side plate; 44. cross bar; 45. motor; 46. water cooling mechanism; 47. fan; 48. cross beam; 461. cold water pipe; 462. water inlet pipe; 463. water outlet pipe; 464. water pump; 465. cold water tank. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the embodiments:

[0031] Example 1

[0032] like Figure 1-5 As shown, the utility model provides an extrusion mechanism for 3D printing, including a discharge port 3, a cooling mechanism 4 is arranged on the top surface of the discharge port 3, a fixing mechanism 2 is arranged on the top surface of the cooling mechanism 4, a discharge mechanism 1 is arranged inside the fixing mechanism 2, the cooling mechanism 4 includes a bottom plate 41, the bottom plate 41 is fixedly connected to the top surface of the discharge port 3, a side plate 43 is fixedly connected to the side of the bottom plate 41, the number of the side plates 43 is two, one end of the side of the two side plates 43 is fixedly connected to a cross beam 48, the side top surfaces of the two side plates 43 are fixedly connected to a top plate 42, a hole is opened in the middle of the side plate 43, and a hole in the side plate 43 is fixedly connected There is a cross bar 44, a motor 45 is fixedly connected to the side of the cross bar 44, a fan 47 is fixedly connected to the output shaft of the motor 45, one end of the side plate 43 is fixedly connected to a water cooling mechanism 46, the water cooling mechanism 46 includes a cold water tank 465, the cold water tank 465 is fixedly connected to one end of the side plate 43, a water pump 464 is fixedly connected to the bottom of the side of the cold water tank 465, the output end of the water pump 464 is fixedly connected to a water outlet pipe 463, one end of the water outlet pipe 463 is fixedly connected to a cold water pipe 461, the other end of the cold water pipe 461 is fixedly connected to a water inlet pipe 462, and the water inlet pipe 462 is fixedly connected to the top of the side of the cold water tank 465.

[0033] In this embodiment, the fan 47 is driven to rotate by the motor 45 arranged on the cross bar 44 on the surface of the side plate 43, so as to cool the discharge port 3. A water cooling mechanism 46 is added on the basis of the cooling fan 47. The cold water in the cold water tank 465 is transferred to the cold water pipe 461 through the water outlet pipe 463 by the water pump 464. The cold water pipe 461 is wrapped around the discharge port 3, which further plays a role in cooling. The fan 47 cools the discharge port 3 and the cold water pipe 461 at the same time, and the cooled water returns to the cold water tank 465 through the water inlet pipe 462.

[0034] Example 2

[0035] like Figure 1-5 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the fixing mechanism 2 includes a fixing plate 21, the fixing plate 21 is fixedly connected to the top surface of the top plate 42, the bottom surface of the fixing plate 21 is fixedly connected with a discharge pipe 27, the discharge pipe 27 passes through the cooling mechanism 4 and is fixedly connected with the discharge port 3, a slot is provided on the side surface of the fixing plate 21, a buckle 22 is movably connected in the hole of the fixing plate 21, a buckle rod 23 is fixedly connected to the side surface of the buckle 22, a toothed rod 24 is fixedly connected to the side surface of the buckle rod 23, a limiting block 26 is fixedly connected to the bottom surface of the toothed rod 24, and a rotating rod 25 is meshed with the top surface of the toothed rod 24.

[0036] In this embodiment, the rotating rod 25 is rotated to drive the toothed rod 24 engaged therewith to move. A limit block 26 is provided at the end of the toothed rod 24 to prevent the toothed rod 24 from being excessively displaced and detached from the fixing mechanism 2. A buckle rod 23 is fixedly connected to the side of the toothed rod 24. The buckle rod 23 is fixedly connected to the buckle 22. The displacement of the buckle rod 23 will cause the buckle 22 to move, thereby facilitating disassembly.

[0037] Example 3

[0038] like Figure 1-5 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the discharging mechanism 1 includes a shell 13, the shell 13 is movably connected to the inside of the fixed plate 21, the surface of the shell 13 is provided with a card slot 14, the card slot 14 is engaged with the surface of the card buckle 22, the side of the shell 13 is fixedly connected with a fixing buckle 15, the side of the fixing buckle 15 is provided with a rotating rod hole, the rotating rod 25 is movably connected to the inside of the fixing buckle 15, the top surface of the shell 13 is fixedly connected with a pillar 11, the surface of the shell 13 is fixedly connected with a limiting rod 12, and the side of the shell 13 is fixedly connected with a feeding port 16.

[0039] In this embodiment, the fixing mechanism 2 is fixed to the surface of the shell 13 by the engagement of the card slot 14 and the card buckle 22. The fixing buckle 15 arranged on the surface of the shell 13 allows the toothed rod 24 and the rotating rod 25 to remain stable during movement. The support 11 fixedly connected to the top of the shell 13 fixes the extrusion mechanism as a whole on the printer. The limiting rod 12 reduces the shaking of the extrusion mechanism during movement, thereby improving the practicality of the device.

[0040] The following is a detailed description of the working principle of the 3D printing extrusion mechanism.

[0041] like Figure 1-5As shown, the motor 45 arranged on the cross bar 44 on the surface of the side plate 43 drives the fan 47 to rotate, so as to cool the discharge port 3. On the basis of the fan 47 cooling, a water cooling mechanism 46 is added. The water pump 464 transmits the cold water in the cold water tank 465 to the cold water pipe 461 through the outlet pipe 463. The cold water pipe 461 is wound around the discharge port 3 to further cool it. The fan 47 cools the discharge port 3 and the cold water pipe 461 at the same time. The cooled water returns to the cold water tank 465 through the water inlet pipe 462. In this embodiment, the rotating rod 25 is rotated to drive the toothed rod 24 engaged therewith to move. A limiting block 26 is provided at the end of the rod 24 to prevent the toothed rod 24 from being displaced excessively and detaching from the fixing mechanism 2. A buckle rod 23 is fixedly connected to the side of the toothed rod 24. The buckle rod 23 is fixedly connected to the buckle 22. The displacement of the buckle rod 23 will cause the buckle 22 to be displaced, thereby facilitating disassembly. The fixing mechanism 2 is fixed to the surface of the shell 13 through the engagement of the card slot 14 with the buckle 22. The fixing buckle 15 provided on the surface of the shell 13 keeps the toothed rod 24 and the rotating rod 25 stable during movement. The pillar 11 fixedly connected to the top of the shell 13 fixes the extrusion mechanism as a whole on the printer. The limiting rod 12 reduces shaking of the extrusion mechanism during movement.

[0042] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An extrusion mechanism for 3D printing, comprising a discharge port (3), characterized in that: The top surface of the discharge port (3) is provided with a cooling mechanism (4), the top surface of the cooling mechanism (4) is provided with a fixing mechanism (2), and the inside of the fixing mechanism (2) is provided with a discharge mechanism (1); The cooling mechanism (4) comprises a bottom plate (41), wherein the bottom plate (41) is fixedly connected to the top surface of the discharge port (3), and the side of the bottom plate (41) is fixedly connected to a side plate (43), and the number of the side plates (43) is two, and one end of the side of the two side plates (43) is fixedly connected to a cross beam (48), and the side top surfaces of the two side plates (43) are fixedly connected to a top plate (42).

2. The 3D printing extrusion mechanism according to claim 1, characterized in that: A hole is opened in the middle of the side plate (43), a cross bar (44) is fixedly connected in the hole of the side plate (43), a motor (45) is fixedly connected to the side of the cross bar (44), a fan (47) is fixedly connected to the output shaft of the motor (45), and a water cooling mechanism (46) is fixedly connected to one end of the side plate (43).

3. The 3D printing extrusion mechanism according to claim 2, characterized in that: The water cooling mechanism (46) comprises a cold water tank (465), the cold water tank (465) is fixedly connected to one end of the side plate (43), a water pump (464) is fixedly connected to the bottom of the side of the cold water tank (465), an output end of the water pump (464) is fixedly connected to a water outlet pipe (463), one end of the water outlet pipe (463) is fixedly connected to a cold water pipe (461), the other end of the cold water pipe (461) is fixedly connected to a water inlet pipe (462), and the water inlet pipe (462) is fixedly connected to the top of the side of the cold water tank (465).

4. The 3D printing extrusion mechanism according to claim 1, characterized in that: The fixing mechanism (2) comprises a fixing plate (21), wherein the fixing plate (21) is fixedly connected to the top surface of the top plate (42), and the bottom surface of the fixing plate (21) is fixedly connected to a discharge pipe (27), and the discharge pipe (27) passes through the cooling mechanism (4) and is fixedly connected to the discharge port (3). A slot is provided on the side surface of the fixing plate (21), and a buckle (22) is movably connected in the hole of the fixing plate (21).

5. The 3D printing extrusion mechanism according to claim 4, characterized in that: The side surface of the buckle (22) is fixedly connected to a buckle rod (23), the side surface of the buckle rod (23) is fixedly connected to a toothed rod (24), the bottom surface of the toothed rod (24) is fixedly connected to a limiting block (26), and the top surface of the toothed rod (24) is meshed with a rotating rod (25).

6. The 3D printing extrusion mechanism according to claim 1, characterized in that: The discharging mechanism (1) comprises a shell (13), the shell (13) is movably connected to the inside of a fixed plate (21), a slot (14) is provided on the surface of the shell (13), the slot (14) is engaged with the surface of a buckle (22), a fixing buckle (15) is fixedly connected to the side of the shell (13), a rotating rod hole is provided on the side of the fixing buckle (15), and the rotating rod (25) is movably connected to the inside of the fixing buckle (15).

7. The 3D printing extrusion mechanism according to claim 6, characterized in that: The top surface of the shell (13) is fixedly connected to a support column (11), the surface of the shell (13) is fixedly connected to a limit rod (12), and the side surface of the shell (13) is fixedly connected to a feed port (16).

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