阅读说明：本技术 一种3d打印机 (3D printer ) 是由 陈炫玮 黄斌 罗陆锋 于 2020-07-20 设计创作，主要内容包括：本发明提供了一种3D打印机,包括框架、热床总成、移动总成、以及喷头组件,所述热床总成设置于所述框架中,所述移动总成固定连接于所述框架中,所述喷头组件滑动连接于所述移动总成上。本发明通过使用风道设计,能够有效精准的对所述喷头组件挤出的耗材进行控温,同时通过在风道中增加隔音结构,有效降低噪声,达到更好的隔音静音效果,而且通过使用平衡机构和负压腔的配合使用,能够更方便的完成具有斜度的结构,使得具有斜度的结构看起来更自然,从而减少打印时间。(The invention provides a 3D printer which comprises a frame, a hot bed assembly, a moving assembly and a spray head assembly, wherein the hot bed assembly is arranged in the frame, the moving assembly is fixedly connected in the frame, and the spray head assembly is connected to the moving assembly in a sliding mode. According to the invention, through the design of the air duct, the temperature of consumables extruded by the spray head assembly can be effectively and accurately controlled, meanwhile, the noise is effectively reduced by adding the sound insulation structure in the air duct, a better sound insulation and silencing effect is achieved, and through the matched use of the balance mechanism and the negative pressure cavity, the structure with the inclination can be more conveniently completed, so that the structure with the inclination looks more natural, and the printing time is reduced.)

1. A3D printer is characterized by comprising a frame, a hot bed assembly, a moving assembly and a spray head assembly, wherein the hot bed assembly is arranged in the frame, the moving assembly is fixedly connected in the frame, and the spray head assembly is connected to the moving assembly in a sliding manner; wherein the content of the first and second substances,

the hot bed assembly is configured for supporting the printing consumables and preventing the printing consumables from generating quality problems due to too fast temperature change;

the moving assembly is configured to drive the spray head assembly to move along a horizontal interface;

the nozzle assembly configured to print a consumable printing material onto the thermal bed assembly.

2. The 3D printer according to claim 1, wherein the heat bed body has a negative pressure chamber therein, the upper surface of the heat bed body has a plurality of through holes, and the negative pressure chamber is communicated with the outside through the through holes.

3. The 3D printer of claim 2, wherein the through holes comprise a peripheral through hole and a central through hole, the peripheral through hole is disposed on the outer periphery of the upper surface of the thermal bed main body, and the central through hole is disposed in the center of the upper surface of the thermal bed main body.

4. The 3D printer according to claim 1, wherein the nozzle assembly comprises a nozzle body and air ducts arranged on two sides of the nozzle body in a mirror image manner, the air ducts are connected with a heat dissipation fan through a pipeline, the heat dissipation fan is fixedly connected to the outer periphery of the nozzle body, and an air outlet of the air duct points to the lower side of the nozzle body.

5. The 3D printer according to claim 4, wherein a sound insulation structure is arranged on the inner wall of the air duct, the sound insulation structure comprises a first sound absorption layer and a sound insulation layer, the first sound absorption layer comprises a protruding portion and a recessed portion, the recessed portion is attached to the sound insulation layer, and an air layer is formed between the protruding portion and the sound insulation layer.

6. The 3D printer of claim 4, wherein a cross section of the air inlet of the air duct is larger than a cross section of the air outlet of the air duct.

Technical Field

The invention relates to the field of 3D printing equipment, in particular to a 3D printer.

Background

At present, 3D printers are developed faster, and most common is a hot-melt type 3D printer, and the basic printing principle is to print each layer of section of a model layer by layer from bottom to top on a hot bed; before starting the model entity, a base surface is printed on the hot bed, and the shape of the base surface is generally as shown in fig. 1 and is formed by reciprocating lines; after the base surface is finished, the model entity can be printed above the base surface. In the printing process of the 3D printer, in order to ensure that the base surface and the hot bed have enough adhesive force and avoid the movement of the model, the hot bed always keeps higher temperature, generally about 110 ℃; however, in the actual printing process, the heat dissipation of the outer contour of the bottom of the model is obviously superior to the heat dissipation of the interior of the model, so the outer contour of the bottom of the model is easy to dry; when a printer nozzle continuously applies shearing force and pressure to the edge of the upper part of the model, the bottom of the model on the different side of the nozzle is easy to tilt upwards, namely a bottom curling effect is formed, and finally the model is dragged transversely, so that the printing cannot be continued; the current method for solving the problem is to stick adhesive tapes on the surface of the hot bed to enhance the friction force between the base surface and the hot bed, which obviously wastes time and labor and is very troublesome.

Disclosure of Invention

The present invention proposes a 3D printer to solve the problems,

in order to achieve the purpose, the invention adopts the following technical scheme:

A3D printer comprises a frame, a hot bed assembly, a moving assembly and a spray head assembly, wherein the hot bed assembly is arranged in the frame, the moving assembly is fixedly connected in the frame, and the spray head assembly is connected to the moving assembly in a sliding manner; wherein the content of the first and second substances,

the hot bed assembly is configured for supporting the printing consumables and preventing the printing consumables from generating quality problems due to too fast temperature change;

the moving assembly is configured to drive the spray head assembly to move along a horizontal interface;

the nozzle assembly configured to print a consumable printing material onto the thermal bed assembly.

The 3D printer, optional, it has the negative pressure chamber to open in the hot bed main part, it has a plurality of through-hole to open on the upper surface of hot bed main part, the negative pressure chamber passes through-hole and external intercommunication.

The 3D printer, optionally, the through-hole includes peripheral through-hole and central through-hole, peripheral through-hole set up in the upper surface periphery of hotbed main part, central through-hole set up in the upper surface center of hotbed main part.

The 3D printer, optionally, the shower nozzle subassembly include shower nozzle main part and mirror image set up in the wind channel of shower nozzle main part both sides, the wind channel passes through the pipeline and is connected with radiator fan, radiator fan fixed connection in on the periphery of shower nozzle main part, the air outlet in wind channel is directional the below of shower nozzle main part.

A3D printer, optionally, be provided with sound-proof structure on the inner wall in wind channel, sound-proof structure includes first sound absorption layer and sound insulation layer, and first sound absorption layer includes bellying and depressed part, and the depressed part is attached on the sound insulation layer, forms the air bed between bellying and the sound insulation layer.

Optionally, the cross section of the air inlet of the air duct is larger than the cross section of the air outlet of the air duct.

The beneficial technical effects obtained by the invention are as follows:

1. through using the design of wind channel, can be effective accurate right the consumptive material that the shower nozzle subassembly was extruded is controlled the temperature.

2. Through increase sound-proof structure in the wind channel, effectively reduce the noise, reach better syllable-dividing silence effect.

3. By using the balance mechanism and the negative pressure chamber in cooperation, the structure having the inclination can be completed more conveniently, so that the structure having the inclination looks more natural, thereby reducing the printing time.

4. Through the cooperation of balance mechanism and negative pressure chamber is used, effectively solves the problem that the work piece sticks up the limit.

Drawings

The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

FIG. 1 is a schematic structural diagram of a 3D printer according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a 3D printer according to an embodiment of the present invention;

FIG. 3 is a schematic top view of a heat bed assembly according to one embodiment of the present invention;

FIG. 4 is a schematic view of the bottom surface of the heat bed assembly according to one embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a showerhead assembly according to one embodiment of the invention;

FIG. 6 is a schematic structural view of a sound insulating structure according to one embodiment of the present invention;

FIG. 7 is a schematic structural view of a sound insulating structure according to one embodiment of the present invention;

FIG. 8 is an enlarged view of the structure at A in FIG. 7;

FIG. 9 is a schematic structural view of a sound insulating structure according to one embodiment of the present invention;

fig. 10 is a cross-sectional view of fig. 9 taken along line B-B.

Description of reference numerals: 1. a frame; 2. a hot bed assembly; 21. a negative pressure chamber; 22. a central through hole; 23. a peripheral via; 24. a Z-direction moving mechanism; 25. a balance plate; 26. a tilt sensor; 27. a laser transmitter; 3. a mobile assembly; 31. an X-direction moving mechanism; 32. a first Y-direction moving mechanism; 33. a second Y-direction moving mechanism; 4. a showerhead assembly; 41. a nozzle body; 42. an air duct; 43. a first sound absorbing layer; 431. a boss portion; 432. a recessed portion; 44. a sound insulating layer; 45. an air layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof;

the invention relates to a 3D printer, which explains the following embodiments according to the description of the attached drawings: