CN221292276U - 3D printer - Google Patents

Abstract

The application discloses a 3D printer, which comprises a frame, a spray head assembly and a consumable cutting mechanism, wherein the spray head assembly is arranged on the frame; the spray head assembly comprises an extrusion assembly, a heating assembly and a nozzle, and a gap is arranged between the extrusion assembly and the heating assembly; and the consumable cutting mechanism is arranged on the frame and comprises a cutter, and the cutter is configured to be inserted into the gap and cut off the consumable. According to the application, the 3D printer is provided with the consumable cutting mechanism outside the nozzle assembly, so that the lifting of the weight of the nozzle assembly is avoided, and the printing precision and the moving fluency of the nozzle assembly are ensured; in addition, consumable cutting mechanism's simple structure easy to assemble, it is little to the repacking of current 3D printer.

Description

3D printer

Technical Field

The application relates to the technical field of 3D printing, in particular to a 3D printer.

Background

When the 3D printer prints and constructs the three-dimensional product layer by layer, consumable materials are placed in a 3D printing spray head, heated and melted, and then sprayed out for stacking printing. During printing, the cutting operation for cutting the consumable material is involved. In the prior art, when carrying out the reloading in 3D printing process, need take out silk material from printing the shower nozzle, because the consumable of the spout region of printing the shower nozzle is in molten state, if take out the consumable of molten state from printing the shower nozzle, will lead to the consumable pollution of molten state or in other parts of infiltration printing the shower nozzle, influence the work efficiency of printing the shower nozzle. In addition, in the prior art, the blanking operation is mostly realized by arranging the blanking part on the 3D printing nozzle, so that the automatic of the 3D printing nozzle is increased, the operation flexibility of the 3D printing nozzle is reduced, and the quality of a printing product is finally influenced. Therefore, it is necessary to provide a 3D printer having a blanking function and capable of ensuring the quality of printed products.

Disclosure of utility model

The application aims to solve the problems and provide a 3D printer, wherein the 3D printer has a blanking function and simultaneously avoids the influence on the quality of a finally printed product.

In order to solve the technical problems, the technical scheme adopted by the application is as follows:

A 3D printer, comprising

The machine frame is provided with a machine frame,

The spray head assembly comprises an extrusion assembly, a heating assembly and a nozzle, and a gap is arranged between the extrusion assembly and the heating assembly; and

The consumable cutting mechanism is arranged on the frame and comprises a cutter, and the cutter can be inserted into the gap and cut off the consumable.

Preferably, the consumable cutting mechanism is fixedly connected to the frame, the consumable cutting mechanism comprises a connecting piece connected to the frame along a first direction, and the cutter is vertically connected to the connecting piece.

Preferably, the consumable cutting mechanism further comprises a cutter driving assembly arranged on the frame, wherein the cutter driving assembly comprises a first vertical driving assembly used for driving the cutter to move along a first direction and a first horizontal driving assembly used for driving the cutter to move along a plane perpendicular to the first direction.

Preferably, the consumable cutting mechanism further comprises a first telescopic driving assembly, and the cutter is connected to the telescopic end of the first telescopic driving assembly and used for driving the cutter to be close to or far away from the spray head assembly.

Preferably, the 3D printer further comprises a detection device configured to detect whether the consumable cutting mechanism is inserted into the gap.

The detection device comprises a photoelectric sensor, wherein the photoelectric sensor comprises a light emitter and a light receiver which are respectively arranged at two ends of the gap; and/or the detection device comprises a Hall sensor and a magnetic piece, wherein the Hall sensor is arranged in the gap or is close to the gap, and the magnetic piece is arranged on the cutter.

Preferably, the spray head assembly further comprises a second drive mechanism and a bracket; the extrusion assembly and the heating assembly are respectively installed on the support, the second driving mechanism is arranged at the top of the frame and connected with the support, and the second driving mechanism is used for driving the spray head assembly to move along a plane surrounded by the second direction and the third direction.

Preferably, the second drive mechanism includes a first translation assembly for driving the showerhead assembly to move in a second direction and a second translation assembly for driving the showerhead assembly to move in a third direction.

Preferably, a guiding structure matched with the cutter is arranged on the area, corresponding to the cutter, of the heating assembly.

Preferably, the end of the cutter, which is close to the spray head assembly, is provided with a chamfer.

The application has the beneficial effects that at least comprises:

According to the application, the 3D printer is provided with the consumable cutting mechanism outside the nozzle assembly, so that the lifting of the weight of the nozzle assembly is avoided, and the printing precision and the moving fluency of the nozzle assembly are ensured; in addition, consumable cutting mechanism's simple structure easy to assemble, it is little to the repacking of current 3D printer.

Drawings

Fig. 1 is a schematic structural diagram of a 3D printer according to the present application;

FIG. 2 is an assembled schematic view of a consumable cutting mechanism;

FIG. 3 is a schematic view of the structure of a showerhead assembly;

FIG. 4 is a schematic structural view of an extrusion assembly;

FIG. 5 is a schematic view of a heating assembly;

fig. 6 is a schematic diagram of a state of the 3D printer when the 3D printer is blanking;

fig. 7 is a schematic diagram of the state of the 3D printer when the 3D printer is not blanking.

Wherein, 1 is the frame, 2 is the shower nozzle subassembly, 21 is the extrusion subassembly, 211 is driving motor, 212 is first gear, 213 is the second gear, 214 is the third gear, 22 is the heating subassembly, 221 is the conveying pipeline, 222 is the heating cylinder, 223 is the guide structure, 23 is the nozzle, 24 is the clearance, 25 is the support, 251 is the platform, 3 is consumptive material cutting mechanism, 31 is the cutter, 32 is the connecting piece.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The description as it relates to "first", "second", etc. in the present application is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

In the description of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and simplification of the description, and is not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Examples

As shown in fig. 1, the 3D printer of the present application comprises a frame 1, a spray head assembly 2, and a consumable cutting mechanism 3;

the spray head assembly 2 is used for printing after heating and melting consumable materials; the spray head assembly 2 comprises an extrusion assembly 21, a heating assembly 22 and a nozzle 23, wherein a gap 24 is arranged between the extrusion assembly 21 and the heating assembly 22; the extrusion assembly 21, the heating assembly 22 and the nozzle 23 are arranged in a first direction;

The consumable cutting mechanism 3 is arranged on the frame 1, the consumable cutting mechanism 3 comprises a cutter 31, and the cutter 31 can be inserted into the gap 24 and cut off the consumable.

During blanking, the consumable cutting mechanism 3 is used for cutting solid consumable areas in the extrusion assembly 21 and consumable materials in a molten state in the heating assembly 22 in the spray head assembly 2 by inserting the cutter 31 into the gap 24 between the extrusion assembly 21 and the heating assembly 22, and then the consumable materials in the extrusion assembly 21 are extracted, so that the consumable materials in the molten state are prevented from being extracted along with the consumable materials in the solid state to affect other components in the spray head assembly 2, and normal operation of the spray head assembly 2 and the 3D printer is further guaranteed. According to the application, the 3D printer is provided with the consumable cutting mechanism 3 outside the nozzle assembly 2, so that the lifting of the weight of the nozzle assembly 2 is avoided, and the printing precision and the moving fluency of the nozzle assembly 2 are ensured; in addition, the consumable cutting mechanism 3 is simple in structure and convenient to install, and modification to the existing 3D printer is small.

As shown in fig. 2, the consumable cutting mechanism 3 is fixedly connected to the frame 1, the consumable cutting mechanism 3 includes a connecting member 32 connected to the frame 1 along a first direction, and the cutter 31 is vertically connected to the connecting member 32. The connecting piece 32 and the cutter 31 are integrally L-shaped after being connected. The connecting piece 32 and the cutter 31 may be integrally formed or connected through an intermediate piece. The top end of the connector 32 is connected to the frame 1, and the top end is made to be away from the 3D printer mounting plane in a first direction. In some embodiments, the connector 32 is integrally formed with the housing 1; in other embodiments, the connector 32 is connected to the frame 1 by a fixed connector.

As shown in fig. 6 and 7, when the consumable cutting mechanism 3 is relatively stationary during cutting, the nozzle assembly 2 moves close to the consumable cutting mechanism 3, so that the cutter 31 is inserted into the gap 24 to cut the consumable; after the blanking is finished, the nozzle assembly 2 is moved away from the consumable cutting mechanism 3 such that the gap 24 is moved away from the cutter.

In other embodiments, the consumable cutting mechanism 3 further comprises a cutter driving assembly provided on the frame 1, wherein the cutter driving assembly comprises a first vertical driving assembly for driving the cutter 31 to move along a first direction and a first horizontal driving assembly for driving the cutter 31 to move along a plane perpendicular to the first direction.

Specifically, the cutter driving assembly is alternatively disposed on a side surface of the frame 1 extending along the first direction. In some embodiments, the cutter 31 is connected to the first horizontal driving assembly, the first horizontal driving assembly is connected to the first vertical driving assembly, the first vertical driving assembly drives the first horizontal driving assembly and the cutter 31 connected to the first horizontal driving assembly to move along a first direction, and the first horizontal driving assembly drives the cutter 31 to move along a plane perpendicular to the first direction. In some embodiments, the first horizontal drive assembly and/or the first vertical drive assembly is a lead screw nut mating assembly and/or a slide rail slider mating assembly. In other embodiments, the cutter 31 is connected to the first vertical drive assembly, which is connected to the first horizontal drive assembly, which is mounted on the frame 1; when in use, the first horizontal driving assembly drives the first vertical driving assembly to move so as to drive the cutter 31 to move along a plane perpendicular to the first direction, and the first vertical driving assembly drives the cutter 31 to move along the first direction.

When the material is cut, the cutter driving assembly drives the cutter 31 to move to a position corresponding to the gap 24, and the cutter 31 is inserted into the gap 24 to cut off the material consumption. Adopt shower nozzle subassembly 2 to be motionless, with cutter 31 be in under the drive of cutter drive assembly with clearance 24 counterpoint and insert in the clearance 24, avoided the 3D printer in order with the displacement that consumable cutting mechanism 3 cooperation counterpoint produced, avoided shower nozzle subassembly 2 to remove to the influence of printing precision and to the waste of printing the consumptive material.

In other embodiments, the consumable cutting mechanism 3 further comprises a first telescopic driving assembly, and the cutter 31 is connected to the telescopic end of the first telescopic driving assembly and is used for driving the cutter 31 to approach or separate from the spray head assembly 2.

The first telescopic component improves the flexibility of alignment between the consumable cutting mechanism 3 and the spray head component 2, and improves the fluency of material cutting operation. When the cutter 31 is used, after corresponding to the gap 24, the first telescopic driving piece drives the cutter 31 to move close to the gap 24 and insert into the gap 24 to cut consumable materials, and the second telescopic driving piece and the cutter driving component are matched together, so that the smoothness and adjustability of the alignment of the cutter 31 and the gap 24 are improved; after the material cutting is finished or when the material cutting is not needed, the first telescopic driving assembly drives the cutter 31 to return to the initial position, so that the cutter 31 is prevented from extending for a long time to interfere the operation of the spray head or other parts of the 3D printer. Specifically, the first flexible drive assembly includes the telescopic link, the flexible end of telescopic link connect in the cutter, the stiff end connect in connecting rod or cutter drive assembly.

Further, the 3D printer further comprises a detection device configured to detect whether the consumable cutting mechanism is inserted into the gap.

The detection device comprises a photoelectric sensor, wherein the photoelectric sensor comprises a light emitter and a light receiver which are respectively arranged at two ends of the gap, when the cutter is inserted into the gap, light rays emitted by the light emitter are blocked by the cutter, the light receiver cannot receive the light rays emitted by the light emitter, and whether the cutter is inserted into the gap can be detected based on the fact that the light rays are far away from the light receiver; and/or the detection device comprises a Hall sensor and a magnetic piece, wherein the Hall sensor is arranged in the gap or is close to the gap, and the magnetic piece is arranged on the cutter; the magnetic piece comprises a magnetic patch arranged on the cutter, and is detected by the Hall sensor when the cutter is inserted into the gap; in other embodiments, the cutter itself may be made of a magnetic material.

As shown in fig. 3, the spray head assembly further includes a second drive mechanism and a bracket 25; the extrusion assembly 21 and the heating assembly 22 are respectively installed on the bracket 25, the second driving mechanism is arranged at the top of the frame 1 and connected with the bracket 25, and the second driving mechanism is used for driving the spray head assembly 2 to move along a plane surrounded by the second direction and the third direction. Wherein the first direction, the second direction and the third direction are perpendicular to each other. The extrusion assembly 21 is used for conveying consumable materials to the heating assembly 22 along a second direction, and the heating assembly 22 is used for heating and melting the consumable materials conveyed into the heating assembly 22; the extrusion assembly 21 and the heating assembly 22 are respectively provided with a first consumable conveying channel and a second consumable conveying channel which are arranged along the second direction. During blanking, the second driving mechanism drives the spray head assembly 2 to move close to the consumable cutting mechanism 3, so that a cutter 31 in the consumable cutting mechanism 3 is inserted into a gap 24 between the extrusion assembly 21 and the heating assembly 22 to cut off consumable, and then the consumable in a molten state is separated from the solid consumable.

Further, the second driving mechanism includes a first translation assembly for driving the showerhead assembly 2 to move in a second direction and a second translation assembly for driving the showerhead assembly 2 to move in a third direction. Specifically, the first translation assembly may be a screw-nut matching moving assembly or a slide rail and slider matching moving assembly; the second translation assembly can be a screw nut matching movement assembly or a sliding rail and sliding block matching movement assembly. In actual operation, the specific selection can be performed according to actual requirements.

As shown in fig. 4, the extrusion assembly 21 includes a driving motor 211 disposed on the bracket 25, a first gear 212 mounted on a rotating end of the driving motor 211, a second gear 213 disposed on the bracket 25 and cooperatively connected with the first gear 212, and a third gear 214 disposed on the bracket 25 and cooperatively connected with the second gear 213, the second gear 213 and the third gear 214 reversely rotate, and a first consumable conveying channel for allowing consumable to pass through is formed between the second gear 213 and the third gear 214.

As shown in fig. 5, the heating assembly 22 includes a material conveying pipe 221 disposed near the extrusion assembly 21 and a heating cylinder 222 communicating with the material conveying pipe, the material conveying pipe 221 is disposed corresponding to the first consumable conveying channel, and the nozzle 23 is disposed at the bottom of the heating cylinder 222; the support 25 is provided with a platform 251 in a region corresponding to the heating assembly 22, and the material conveying pipe 221 is disposed inside the platform 251. It should be noted that, in the embodiment of the present application, the top refers to a direction away from the 3D printer mounting plane along a first direction, and the bottom refers to a direction close to the 3D printer mounting plane along the first direction. In printing, the consumable is transferred from the first consumable transfer channel to the material transfer pipe 221 through the gap 24, then transferred to the material transfer pipe 221 for heating and melting, and then the melted consumable is ejected from the nozzle 23. Preferably, the first consumable transfer channel is arranged coaxially with the feed conveyor pipe 221 and the nozzle 23.

The area of the heating component 22 corresponding to the cutter 31 is provided with a guiding structure 223 matched with the cutter 31.

Specifically, the guide structure 223 is disposed on the platform 251. As shown in fig. 4, in this embodiment, the guiding structure 223 is a guiding protrusion corresponding to the edge of the cutter 31; in other embodiments, the guiding structure 223 is a guiding groove formed on the platform 251 and disposed in parallel along the moving direction of the cutter 31, and the feeding pipe 221 is projected to the bottom of the guiding groove along the first direction. The guiding structure 223 is arranged to guide the movement of the cutter 31 after the cutter 31 is inserted into the gap 24, so that the cutter 31 can accurately cut consumable materials, and accuracy and reliability of cutting operation are improved.

The end of the cutter 31 near the spray head assembly 2 is provided with a chamfer. The chamfering ensures that the cutter 31 collides when being inserted into the gap 24, thereby ensuring that the end part of the cutter 31 is efficiently inserted into the gap 24 and further ensuring the running stability and reliability of the spray head assembly 2.

When the 3D printer is used for printing, the method comprises the following operation steps:

Consumable by extrusion subassembly 21 convey to heating subassembly 22 heating melting, second actuating mechanism drives shower nozzle subassembly 2 along the plane that second direction and third direction enclose is removed, the consumable is derived by the nozzle 23 of shower nozzle subassembly 2 and is printed. During blanking, the cutter 31 is inserted into the gap 24 between the extrusion assembly 21 and the heating assembly 22 to cut the consumable. The consumable cutting mechanism 3 is arranged, so that consumable replacement or cutting-off of the 3D printer is facilitated, and the 3D printer is applicable to printing large-size products and small-size products or products with different colors.

The 3D printer further comprises a forming platform 2 and a first driving mechanism, wherein the forming platform 2 is arranged in the frame 1 and used for bearing a forming workpiece; the first driving mechanism 3 is used for driving the forming platform 2 to lift along a first direction; during printing, printing materials sprayed out of the spray head assembly are printed on the forming platform 2 layer by layer, the forming platform 2 moves downwards along the first direction under the drive of the first driving mechanism 3, and the printing materials are stacked and formed layer by layer on the forming platform 2.

The 3D printer further comprises a consumable supply disc which is arranged on the frame 1 and used for coiling consumable materials. In other embodiments, the number of the nozzle assemblies 2 provided in the 3D printer is at least 1; the number of consumable supply trays corresponds to the number of showerhead modules 2.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples only represent preferred embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A 3D printer, characterized in that: the 3D printer comprises

The machine frame is provided with a machine frame,

The spray head assembly comprises an extrusion assembly, a heating assembly and a nozzle, and a gap is arranged between the extrusion assembly and the heating assembly; and

The consumable cutting mechanism is arranged on the frame and comprises a cutter, and the cutter is configured to be inserted into the gap and cut off the consumable.

2. The 3D printer of claim 1, wherein: the consumable cutting mechanism is fixedly connected to the frame and comprises a connecting piece connected to the frame along a first direction, and the cutter is vertically connected to the connecting piece.

3. The 3D printer of claim 1, wherein: the consumable cutting mechanism further comprises a cutter driving assembly arranged on the frame, wherein the cutter driving assembly comprises a first vertical driving assembly used for driving the cutter to move along a first direction and a first horizontal driving assembly used for driving the cutter to move along a plane perpendicular to the first direction.

4. A 3D printer according to any one of claims 2 or 3, wherein: the consumable cutting mechanism further comprises a first telescopic driving assembly, and the cutter is connected to the telescopic end of the first telescopic driving assembly and used for driving the cutter to be close to or far away from the spray head assembly.

5. The 3D printer of claim 1, wherein: the 3D printer further includes a detection device configured to detect whether the consumable cutting mechanism is inserted into the gap.

6. The 3D printer of claim 5, wherein: the detection device comprises a photoelectric sensor, wherein the photoelectric sensor comprises a light emitter and a light receiver which are respectively arranged at two ends of the gap; and/or the detection device comprises a Hall sensor and a magnetic piece, wherein the Hall sensor is arranged in the gap or is close to the detection device, and the magnetic piece is arranged on the cutter.

7. The 3D printer of claim 1, wherein: the spray head assembly further comprises a second driving mechanism and a bracket; the extrusion assembly and the heating assembly are respectively installed on the support, the second driving mechanism is arranged at the top of the frame and connected with the support, and the second driving mechanism is used for driving the spray head assembly to move along a plane surrounded by the second direction and the third direction.

8. The 3D printer of claim 7, wherein: the second drive mechanism includes a first translation assembly for driving the showerhead assembly to move in a second direction and a second translation assembly for driving the showerhead assembly to move in a third direction.

9. The 3D printer of claim 1, wherein: and a guiding structure matched with the cutter is arranged on the region of the heating assembly corresponding to the cutter.

10. The 3D printer of claim 1, wherein: the end of the cutter, which is close to the spray head assembly, is provided with a chamfer.