Movable 3D printing nozzle

Abstract

A movable 3D printing nozzle relates to the technical field of 3D printers and comprises an X-axis connecting plate, a nozzle assembly mounting plate and a sliding connecting assembly. The sliding connection assembly comprises a linear guide rail which is correspondingly and vertically connected with the X-axis connection plate in a fastening mode. A rail body of the linear guide rail is in sliding fit with a sliding block which is correspondingly connected with the spray head assembly installation plate in a fastening mode. A reset assembly is arranged between the top of the sliding block and the X-axis connecting plate and comprises a first spring seat connected with the top of the sliding block in a fastened mode, a second spring seat connected with the X-axis connecting plate in a fastened mode is arranged above the first spring seat, and a reset spring is arranged between the first spring seat and the second spring seat. The bottom of the linear guide rail or the plate surface of the X-axis connecting plate is provided with a limiting device for preventing the sliding block from separating; the system provided by the utility model has strong fault-tolerant performance, can reduce the situation of pause or advanced printing ending caused by accidents, and improves the project completion rate.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printers, in particular to a movable 3D printing nozzle. Background Art

[0002] The demand for large-scale 3D printing projects is increasing, and the requirements are getting higher and higher. Printing efficiency and quality are particularly important in the parameter indicators of such models. The leveling work before printing on a platform with a larger printing size is a difficult point. During the printing process, the first layer of a large platform printing project is prone to warping. Large nozzles will also have material accumulation and staggered layers during the printing process, which will affect the printing progress. However, the height difference between the 3D printing nozzle part and the X-axis motion component is relatively fixed at present. The nozzle can only move in the X-axis direction. During the printing process, the nozzle will accumulate material and the model will warp. The large platform leveling is not accurate enough, which affects the printing results, often causing the printing to be suspended for a long time, or the printing to be terminated midway, resulting in the problem of waste of printing consumables.

[0003] A Chinese patent (publication number: CN206287520U) discloses a working platform calibration mechanism for a 3D printer; the patented extrusion device includes an extrusion body, a spring, a slider guide, a light sensor and a spindle, the spring abuts between the slider guide and the extrusion body, the slider guide is embedded in the print head fixing seat, and is driven up and down by the print head fixing seat, the light sensor is provided with a groove and is fixed on the extrusion body, the spindle is sleeved on the outer side of the print head fixing seat, and is driven up and down by the print head fixing seat; in actual use, it is found that after the feeding device and the print head penetrate the printing consumables, the thicker printing consumables have strong rigidity, which limits the upward movement of the print head. Therefore, the patented structure can only perform work platform calibration before printing. During the printing process, the printing consumables limit the upward movement function of the print head, resulting in it being unable to effectively deal with the problem of material accumulation or model warping. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a movable 3D printing nozzle.

[0005] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0006] A movable 3D printing nozzle comprises an X-axis connecting plate, a nozzle assembly mounting plate and a sliding connection assembly; the nozzle assembly mounting plate is vertically slidably connected to the X-axis connecting plate via the sliding connection assembly; the sliding connection assembly comprises a linear guide rail vertically fastened to the X-axis connecting plate, the linear guide rail body is slidably matched with a slider fastened to the nozzle assembly mounting plate; a reset assembly is provided between the top of the slider and the X-axis connecting plate, the reset assembly comprises a first spring seat fastened to the top of the slider, a second spring seat fastened to the X-axis connecting plate is provided above the first spring seat, and a reset spring is provided between the first spring seat and the second spring seat; a limiting device is provided at the bottom of the linear guide rail or the surface of the X-axis connecting plate to prevent the slider from detaching.

[0007] Preferably, the X-axis connecting plate is installed with a photoelectric switch, and a shading plate which can trigger the photoelectric switch after rising is installed below the nozzle assembly mounting plate corresponding to the photoelectric switch.

[0008] Preferably, reset components are provided on both sides of the linear guide rail.

[0009] Preferably, the nozzle assembly mounting plate is provided with a slot at a position corresponding to the slider, and the slider is embedded in the slot.

[0010] Preferably, the X-axis connecting plate is provided with a groove for embedding the linear guide rail at the position corresponding to the linear guide rail.

[0011] Preferably, a buffer assembly is provided below the slider corresponding to the X-axis connecting plate, and the buffer assembly includes a third spring seat fastened corresponding to the X-axis connecting plate, and a buffer spring with a smaller elastic force than the return spring is provided between the third spring seat and the bottom of the slider.

[0012] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0013] The utility model discloses a movable 3D printing nozzle with a simple structure and strong fault tolerance. The nozzle assembly mounting plate is vertically slidably connected to the X-axis connecting plate through a sliding connection assembly. When the nozzle assembly contacts foreign matter, material accumulation or the warped edge of the model, it can drive the nozzle assembly mounting plate and the slider to automatically move upward. When the nozzle assembly leaves the foreign matter, material accumulation or the warped edge of the model, the nozzle assembly automatically resets under the action of its own gravity and the elastic force of the reset spring, thereby achieving the purpose of uninterrupted printing. At the same time, it can prevent the nozzle assembly from colliding with foreign matter, being dislocated or damaged. For models with material accumulation or warped edges, they can be repaired after printing is completed, thereby avoiding waste of printing consumables, especially in projects that require long-term printing work, reducing the situation of unexpected pauses or early termination of printing, and improving the project completion rate. In addition, a buffer assembly is provided below the slider corresponding to the X-axis connecting plate. In the process of the nozzle assembly driving the slider to move down and reset, the buffer spring can buffer the slider to avoid violent collision between the slider and the limit device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 is a structural schematic diagram of a sliding connection assembly;

[0016] Figure 3 It is a partial cross-sectional view of the utility model.

[0017] In the figure: 1. X-axis connecting plate; 2. Nozzle assembly mounting plate; 3. Sliding connection assembly; 3-1. Linear guide; 3-2. Sliding block; 3-3. First spring seat; 3-4. Second spring seat; 3-5. Reset spring; 4. Photoelectric sensor; 5. Shading plate; 6. Slot; 7. Third spring seat; 8. Buffer spring. DETAILED DESCRIPTION

[0018] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0019] Embodiment 1, in combination with Figures 1-2A movable 3D printing nozzle comprises an X-axis connecting plate 1, a nozzle assembly mounting plate 2 and a sliding connection assembly 3; the nozzle assembly mounting plate 2 is vertically slidably connected with the X-axis connecting plate 1 via the sliding connection assembly 3, that is, when in use, the X-axis connecting plate 1 is mounted on the X-axis assembly of the 3D printer, and the X-axis connecting plate 1 is driven by the X-axis assembly to move along the X-axis; the printing nozzle assembly is mounted on the nozzle assembly mounting plate 2;

[0020] The sliding connection assembly 3 comprises a linear guide rail 3-1 vertically fastened to the X-axis connection plate 1, and the rail body of the linear guide rail 3-1 is slidably matched with a slider 3-2 fastened to the nozzle assembly mounting plate 2; a reset assembly is provided between the top of the slider 3-2 and the X-axis connection plate 1, and the reset assembly comprises a first spring seat 3-3 fastened to the top of the slider 3-2, a second spring seat 3-4 fastened to the X-axis connection plate 1 is provided above the first spring seat 3-3, and a reset spring 3-5 is provided between the first spring seat 3-3 and the second spring seat 3-4;

[0021] That is, the sliding connection component 3 enables the print head assembly to automatically move up when it contacts foreign matter. During the printing process, if foreign matter appears on the printing path, or the printed model has material accumulation or warping, the print head assembly can automatically drive the nozzle assembly mounting plate 2 and the slider 3-2 to move up when it contacts the foreign matter, material accumulation or model warping. When the print head assembly leaves the foreign matter, material accumulation or model warping, the print head assembly automatically resets under the action of its own gravity and the elastic force of the reset spring 3-5, thereby achieving the purpose of uninterrupted printing. At the same time, it can prevent the print head assembly from colliding with foreign matter, being dislocated or damaged. Models with material accumulation or warping can be repaired after printing, thereby avoiding waste of printing consumables and improving the project completion rate.

[0022] It should be noted that both sides of the linear guide rail 3-1 are provided with reset components, which can effectively improve the stability of the slider 3-2 moving up and down along the linear guide rail 3-1;

[0023] A limit device is provided at the bottom of the linear guide 3-1 or the surface of the X-axis connecting plate 1 to prevent the slider 3-2 from detaching. The limit device can be a limit baffle plate tightly connected to the linear guide 3-1 or the X-axis connecting plate 1, which can prevent the slider 3-2 from moving down and detaching from the linear guide 3-1.

[0024] Embodiment 2, in combination with Figure 1, a movable 3D printing nozzle, which is different from Example 1 in that, on the basis of Example 1, the X-axis connecting plate 1 is installed with a photoelectric sensor 4, and a shading plate 5 that can trigger the photoelectric sensor 4 after rising is installed under the nozzle assembly mounting plate 2 corresponding to the photoelectric sensor 4, that is, when the nozzle assembly mounting plate 2 moves up, it can drive the shading plate 5 to move up, so that the shading plate 5 can trigger the photoelectric sensor 4; before printing, the printing nozzle assembly can be controlled to contact with multiple points that are not collinear with the printing platform respectively, and after the printing nozzle assembly contacts the printing platform, the Z axis continues to move downward, and the X-axis connecting plate 1 drives the photoelectric sensor 4 to move downward, so that the shading plate 5 triggers the photoelectric sensor 4, records the Z axis coordinate, and indirectly reflects the horizontality of the printing platform by comparing the multiple Z axis coordinates that are not collinear, thereby assisting the leveling operation of the printing platform, without the need to install an additional printing platform horizontality detection component, reducing the use cost, and avoiding the situation where the additionally installed printing platform horizontality detection component is damaged by collision or interferes with the printing during the printing process;

[0025] During the printing process, when the print head assembly contacts foreign matter, material accumulation or warped edges of the model, the photoelectric sensor 4 can also be triggered. The photoelectric sensor 4 sends a feedback signal to remind the operator so that the operator can check the printing status in time.

[0026] Embodiment 3, in combination with Figure 3 , a movable 3D printing nozzle, based on embodiment 1 or 2, the nozzle assembly mounting plate 2 is provided with a slot 6 corresponding to the position of the slider 3-2, and the slider 3-2 is embedded in the slot 6; the X-axis connecting plate 1 is provided with a groove for embedding the linear guide 3-1 at the position corresponding to the linear guide 3-1, while ensuring that the slider 3-2 is not in contact with the X-axis connecting plate 1, avoiding interference with the up and down movement of the slider 3-2; through the slot 6 and the groove on the surface of the X-axis connecting plate 1, the sliding connection component 3 can be hidden, making the overall structure more compact.

[0027] Embodiment 4, in combination with Figures 2-3 , a movable 3D printing nozzle, based on any one of embodiments 1 to 3, a buffer component is provided under the slider 3-2 corresponding to the X-axis connecting plate 1, and the buffer component includes a third spring seat 7 which is fastened and connected to the X-axis connecting plate 1, and a buffer spring 8 with a smaller elastic force than the reset spring 3-5 is provided between the third spring seat 7 and the bottom of the slider 3-2, that is, in the process of the printing nozzle driving the slider 3-2 to move down and reset, the buffer spring 8 can play a buffering role on the slider 3-2 to prevent the slider 3-2 from colliding violently with the limiting device.

[0028] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A movable 3D printing nozzle, characterized by: The invention comprises an X-axis connecting plate (1), a nozzle assembly mounting plate (2) and a sliding connection assembly (3); the nozzle assembly mounting plate (2) is vertically slidably connected to the X-axis connecting plate (1) via the sliding connection assembly (3); the sliding connection assembly (3) comprises a linear guide rail (3-1) vertically and rigidly connected to the X-axis connecting plate (1); the linear guide rail (3-1) has a sliding block (3-2) that is rigidly connected to the nozzle assembly mounting plate (2); the top of the sliding block (3-2) is A reset component is provided between the linear guide rail (3-1) and the X-axis connecting plate (1), the reset component comprising a first spring seat (3-3) which is fixedly connected to the top of the slider (3-2), a second spring seat (3-4) which is fixedly connected to the X-axis connecting plate (1) is provided above the first spring seat (3-3), and a reset spring (3-5) is provided between the first spring seat (3-3) and the second spring seat (3-4); a limit device which prevents the slider (3-2) from detaching is provided at the bottom of the linear guide rail (3-1) or the surface of the X-axis connecting plate (1).

2. The movable 3D printing nozzle according to claim 1, characterized in that: The X-axis connecting plate (1) is installed with a photoelectric sensor (4), and the nozzle assembly mounting plate (2) is installed with a light shielding plate (5) below the photoelectric sensor (4) corresponding to the photoelectric sensor (4) and capable of triggering the photoelectric sensor (4) after rising.

3. The movable 3D printing nozzle according to claim 1, characterized in that: Reset components are provided on both sides of the linear guide rail (3-1).

4. The movable 3D printing nozzle according to claim 1, characterized in that: The nozzle assembly mounting plate (2) is provided with a slot (6) at a position corresponding to the sliding block (3-2), and the sliding block (3-2) is embedded in the slot (6).

5. The movable 3D printing nozzle according to claim 1 or 4, characterized in that: The X-axis connecting plate (1) is provided with a groove for embedding the linear guide rail (3-1) at a position corresponding to the linear guide rail (3-1).

6. The movable 3D printing nozzle according to claim 1, characterized in that: A buffer assembly is provided below the slider (3-2) corresponding to the X-axis connecting plate (1), the buffer assembly comprising a third spring seat (7) correspondingly and fixedly connected to the X-axis connecting plate (1), and a buffer spring (8) having a smaller elastic force than the return spring (3-5) is provided between the third spring seat (7) and the bottom of the slider (3-2).

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