Fused deposition type 3D printing nozzle

Abstract

The utility model discloses a fused deposition type 3D printing nozzle, and relates to the technical field of additive manufacturing. The fused deposition type 3D printing spray head comprises a box body, and further comprises a spray head part arranged in the box body, and a transverse moving unit and a longitudinal moving unit which are used for controlling the spray head part to move; the spray head part comprises a spray head main body, cooling fins, a cooling fan, a base, a feeding part and a feeding pipe head; the feeding part is arranged in the middle of the spray head body, the cooling fins are arranged outside the feeding part, the cooling fan is arranged on the cooling fins, the feeding pipe head is arranged at the top of the feeding part, and the base is used for bearing the spray head body. A nozzle is arranged at the bottom of the nozzle part; the stable temperature gradient is maintained between the feeding part and the heating part through the cooling fins and the cooling fan, wires are prevented from being softened in advance, and the phenomenon that the nozzles are blocked due to local hardening is avoided through stirring of the end patter and the through needles in the nozzles.

Description

Technical Field

[0001] This utility model belongs to the field of additive manufacturing technology, and in particular relates to a fused deposition modeling 3D printing nozzle. Background Technology

[0002] 3D printing technology, also known as additive manufacturing, is a technology that uses digital model files as a basis and employs adhesive materials to construct objects layer by layer. 3D printing is typically achieved using 3D printers. 3D printers, also called three-dimensional printers or stereoprinters, are a type of rapid prototyping equipment. 3D printers are commonly used in mold making, industrial design, and other fields to manufacture models or parts. A typical 3D printing technology is fused deposition modeling (FDM), where the printer nozzles selectively deposit molten material layer by layer along a predetermined path to build objects; the material used is thermoplastic polymer filament.

[0003] The wire is softened or partially melted before entering the heating block. After expansion, the friction with the inner wall of the throat increases, which can easily create resistance or blockage. In addition, the flow channel of most nozzles is tapered (such as the E3D V6 nozzle with an inlet diameter of 2mm and an outlet diameter of 0.4mm). The melt is prone to forming eddies or stagnant zones in the contraction section, resulting in the accumulation of impurities or uneven heating and local hardening. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a fused deposition modeling 3D printing nozzle that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: a fused deposition modeling 3D printing nozzle, including a housing, and further including: a nozzle head disposed inside the housing, and a transverse movement unit and a longitudinal movement unit for controlling the movement of the nozzle head; the nozzle head includes a nozzle body, heat dissipation fins, a cooling fan, a base, a feeding section, and a feeding tube head; the feeding section is located in the middle part of the nozzle body, the heat dissipation fins are disposed outside the feeding section, the cooling fan is disposed on the heat dissipation fins, the feeding tube head is disposed at the top of the feeding section, and the base is used to support the nozzle body; a nozzle is disposed at the bottom of the nozzle head; a heating section is disposed at the bottom of the feeding section, an extrusion screw is disposed in the lower middle part of the heating section, an end plate is disposed at the bottom of the extrusion screw, and a through needle is disposed at the bottom of the end plate.

[0006] Preferably, the box body is provided with an extension, the extension is provided with a feeding chamber, the box body is provided with a door, and the box body is provided with a display panel.

[0007] Preferably, the lateral movement unit includes end plate one, lateral guide rod, lateral transmission belt and end plate two.

[0008] Preferably, the transverse transmission belt is engaged with both end plate one and end plate two, the base is slidably connected to the transverse guide rod, the transverse transmission belt is fixedly connected to the base, and the transverse guide rod is disposed between end plate one and end plate two.

[0009] Preferably, the longitudinal movement unit includes a transmission rod, an auxiliary rod, a longitudinal transmission belt, and a longitudinal guide rod.

[0010] Preferably, there are two sets of longitudinal transmission belts and longitudinal guide rods, which correspond to end plate one and end plate two respectively. The transmission rod and auxiliary rod are set at both ends of the longitudinal transmission belt. End plate one and end plate two slide on the two sets of longitudinal guide rods respectively. End plate one and end plate two are fixedly connected to the two sets of longitudinal transmission belts respectively.

[0011] Preferably, the feeding section is provided with corresponding feeding rollers and pressing blocks.

[0012] Preferably, the nozzle body is provided with a driving gear and a driven gear that mesh with each other, the top of the extrusion screw is provided with a rotating end, the rotating end is provided with a feeding channel, and the driven gear is fixed to the rotating end.

[0013] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention maintains a stable temperature gradient between the feeding section and the heating section through heat dissipation fins and heat dissipation fan, avoiding premature softening of the wire, and avoids nozzle blockage due to uneven heating by stirring inside the nozzle through end plate and needle. Attached Figure Description

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the overall structure of a fused deposition modeling 3D printing nozzle proposed in this utility model;

[0016] Figure 2 This invention provides a schematic diagram of the internal structure of a fused deposition modeling (FDM) 3D printing nozzle housing. Figure 1 ;

[0017] Figure 3 This invention provides a schematic diagram of the internal structure of a fused deposition modeling (FDM) 3D printing nozzle housing. Figure 2 ;

[0018] Figure 4 This is a schematic diagram of the nozzle head structure in a fused deposition modeling 3D printing nozzle proposed in this utility model;

[0019] Figure 5 This is a cross-sectional view of the nozzle head in a fused deposition modeling 3D printing nozzle proposed in this utility model;

[0020] Figure 6 This invention proposes a fused deposition modeling 3D printing nozzle. Figure 5 An enlarged structural diagram of part A in the middle.

[0021] In the diagram: 1. Box body; 2. Box door; 3. Feeding chamber; 4. Extension section; 5. Display panel; 6. Nozzle head; 601. Nozzle head body; 602. Heat dissipation fins; 603. Cooling fan; 604. Base; 605. Feeding section; 606. Feeding pipe head; 7. Lateral movement unit; 701. End plate one; 702. Lateral guide rod; 703. Lateral transmission belt; 704. End plate two; 8. Longitudinal movement unit; 801. Transmission rod; 802. Auxiliary rod; 803. Longitudinal transmission belt; 804. Longitudinal guide rod; 9. Nozzle; 10. Feeding roller; 11. Pressing block; 12. Heating section; 13. Extrusion screw; 14. Rotating end; 15. Feeding channel; 16. End squeegee; 17. Passing needle; 18. Driven gear; 19. Driving gear. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0023] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0024] In the description of this utility model, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Example 1: Refer to Figures 1-6A fused deposition modeling (FDM) 3D printing nozzle includes a housing 1 and a nozzle head 6 disposed inside the housing 1, as well as a lateral movement unit 7 and a longitudinal movement unit 8 for controlling the movement of the nozzle head 6. The nozzle head 6 includes a nozzle body 601, heat dissipation fins 602, a cooling fan 603, a base 604, a feeding section 605, and a feeding tube head 606. The feeding section 605 is located in the middle of the nozzle body 601, the heat dissipation fins 602 are disposed outside the feeding section 605, the cooling fan 603 is disposed on the heat dissipation fins 602, the feeding tube head 606 is disposed on the top of the feeding section 605, and the base 604 is used to support the nozzle body 601. A nozzle 9 is disposed at the bottom of the nozzle head 6. A heating section 12 is disposed at the bottom of the feeding section 605, an extrusion screw 13 is disposed in the lower middle part of the heating section 12, an end plate 16 is disposed at the bottom of the extrusion screw 13, and a needle 17 is disposed at the bottom of the end plate 16.

[0026] In this invention, the lateral moving unit 7 and the longitudinal moving unit 8 cooperate with each other to control the omnidirectional movement of the spray head 6;

[0027] The feeding section 605 conveys material into the interior through the feeding pipe head 606. The cooling fan 603 and the heat dissipation fins 602 accelerate the heat dissipation of the feeding section 605, so that the feeding section 605 and the heating section 12 maintain a stable temperature gradient, ensuring that the melt extrusion process is controllable. At the same time, by isolating the high temperature zone and the low temperature zone, the material is prevented from softening and clogging prematurely.

[0028] The heating section 12 mainly heats and melts the material through the upper heating component. The molten material is extruded through the extrusion screw 13 in the middle and lower part of the heating section 12 and sprayed out through the nozzle 9. The pipes inside the heating section 12 and the pipes inside the nozzle 9 have different diameters. The end plate 16 rotates synchronously with the extrusion screw 13 to prevent the molten material from clogging at the junction of the heating section 12 and the nozzle 9.

[0029] The extrusion screw 13 drives the needle 17 to rotate, causing the needle 17 to stir inside the nozzle 9 pipe, thus preventing the molten material from forming eddies or stagnant areas in the contraction section of the nozzle 9, which could lead to uneven heating, local hardening, and blockage.

[0030] Furthermore, the needle 17 can be a conical shape that is thicker at the top and thinner at the bottom, which can further reduce the space inside the nozzle 9 pipe, allowing the molten material to be ejected more quickly. At the same time, it avoids the excessive amount of molten material remaining inside the nozzle 9 pipe, which would lead to waste.

[0031] Example 2: Refer to Figures 1-6Similar to Embodiment 1, but further: the box body 1 is provided with an extension 4, the extension 4 is provided with a feeding chamber 3, the box body 1 is provided with a box door 2, and the box body 1 is provided with a display panel 5; the transverse moving unit 7 includes an end plate 1 701, a transverse guide rod 702, a transverse transmission belt 703, and an end plate 2 704; the transverse transmission belt 703 is engaged with both the end plate 1 701 and the end plate 2 704, the base 604 is slidably connected to the transverse guide rod 702, the transverse transmission belt 703 is fixedly connected to the base 604, and the transverse guide rod 702 is disposed between the end plate 1 701 and the end plate 2 704; the longitudinal moving unit 8 includes a transmission rod 801, an auxiliary rod 802, a longitudinal transmission belt 803, and a longitudinal guide rod 804; Two sets of longitudinal transmission belts 803 and longitudinal guide rods 804 are provided, corresponding to end plate 1 701 and end plate 2 704 respectively. Transmission rods 801 and auxiliary rods 802 are provided at both ends of the longitudinal transmission belts 803. End plate 1 701 and end plate 2 704 slide on the two sets of longitudinal guide rods 804 respectively. End plate 1 701 and end plate 2 704 are fixedly connected to the two sets of longitudinal transmission belts 803 respectively. The feeding part 605 is provided with corresponding feeding rollers 10 and pressing blocks 11. The nozzle body 601 is provided with a meshing drive gear 19 and driven gear 18. The top of the extrusion screw 13 is provided with a rotating end head 14. A feeding channel 15 is opened on the rotating end head 14. The driven gear 18 is fixed on the rotating end head 14.

[0032] In this invention, the specific operation of the 3D printer can be displayed through the display panel 5;

[0033] The end plate 704 is provided with a drive unit for driving the transverse transmission belt 703 to run. The transverse transmission belt 703 controls the nozzle 6 to move on the transverse guide rod 702. The transverse guide rod 702 enables the nozzle 6 to move stably.

[0034] Inside the housing 1, there is a drive unit that drives the transmission rod 801 to rotate. Both ends of the transmission rod 801 are engaged with the longitudinal transmission belt 803. The transmission rod 801 drives the longitudinal transmission belt 803 to run. End plate 701 and end plate 704 are fixedly connected to two sets of longitudinal transmission belts 803 respectively. Thus, when the longitudinal transmission belt 803 is running, end plate 701 and end plate 704 move synchronously with the longitudinal transmission belt 803, thereby causing the nozzle 6 to move longitudinally synchronously.

[0035] The heating component inside the heating section 12 heats and melts the material. The molten material enters the rotating end head 14. The rotating end head 14 has a groove inside to accommodate the molten material. The feeding channel 15 at the bottom of the groove connects the upper and lower middle parts of the internal pipe of the heating section 12. The feeding channel 15 is inclined downward. During the rotation of the extrusion screw 13, centrifugal force can be used to further accelerate the flow of the molten material into the lower middle part of the heating section 12.

[0036] The space outside the heating section 12 may be provided with a drive unit to drive the drive gear 19 to rotate, the drive gear 19 drives the driven gear 18 to rotate, and thus drives the extrusion screw 13 to rotate;

[0037] The material enters the feeding section 605 through the feeding tube head 606. The feeding roller 10 inside the feeding section 605 rotates, causing the material to be continuously conveyed downwards. At the same time, the pressing block 11 presses against the other end of the material (filament), so that the feeding roller 10 has a certain friction with the material when it is in motion, thus allowing the material to be fed smoothly.

[0038] The cooling fan 603 (usually a turbine fan or radial fan) blows air directly onto the heat sink 602 (made of copper or aluminum), which quickly reduces the temperature of the feeding section 605 through forced convection, or makes the heat dissipation of the feeding section 605 uniform. In high-speed printing or high-temperature materials (such as ABS, nylon) scenarios, the speed of the cooling fan 603 can be adjusted with temperature changes to prevent local hardening and blockage caused by insufficient local heat dissipation.

[0039] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. A fused deposition type 3D printing nozzle comprising a cartridge (1), characterized in that, Also include: The nozzle (9) is arranged at the bottom of the spray head (6). The heating part (12) is arranged at the bottom of the feeding part (605), the extrusion screw (13) is arranged at the middle and lower part of the heating part (12), the end wiping plate (16) is arranged at the bottom of the extrusion screw (13), and the through needle (17) is arranged at the bottom of the end wiping plate (16). The extension part (4) is arranged on the box (1), the feeding chamber (3) is arranged on the extension part (4), the box door (2) is arranged on the box (1), and the display panel (5) is arranged on the box (1). The lateral moving unit (7) comprises an end plate one (701), a lateral guide rod (702), a lateral transmission belt (703) and an end plate two (704). The lateral transmission belt (703) is in meshing connection with the end plate one (701) and the end plate two (704), the base (604) is in sliding connection with the lateral guide rod (702), the lateral transmission belt (703) is in fixed connection with the base (604), and the lateral guide rod (702) is arranged between the end plate one (701) and the end plate two (704).

2. The fused deposition 3D printing nozzle according to claim 1, characterized in that The longitudinal moving unit (8) comprises a transmission rod (801), an auxiliary rod (802), a longitudinal transmission belt (803) and a longitudinal guide rod (804).

3. The fused deposition 3D printing nozzle of claim 1, wherein, The longitudinal transmission belt (803) and the longitudinal guide rod (804) are arranged in two groups and correspond to the end plate one (701) and the end plate two (704) respectively, the transmission rod (801) and the auxiliary rod (802) are arranged at two ends of the longitudinal transmission belt (803), the end plate one (701) and the end plate two (704) are respectively in sliding connection with the two groups of longitudinal guide rods (804), and the end plate one (701) and the end plate two (704) are respectively in fixed connection with the two groups of longitudinal transmission belts (803).

4. The fused deposition 3D printing nozzle according to claim 3, characterized in that The feeding roller (10) and the pressing block (11) are arranged in the feeding part (605) and correspond to each other.

5. The fused deposition 3D printing nozzle according to claim 4, characterized in that The driving gear (19) and the driven gear (18) are arranged in the spray head body (601) and are in meshing connection with each other, the rotating end head (14) is arranged at the top of the extrusion screw (13), the feeding channel (15) is arranged in the rotating end head (14), and the driven gear (18) is fixed on the rotating end head (14).

6. The fused deposition 3D printing nozzle according to claim 5, characterized in that ​ 7. The fused deposition 3D printing nozzle of claim 1, wherein, ​ 8. The fused deposition 3D printing nozzle according to claim 7, characterized in that ​

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