CN214983252U

CN214983252U - Cyclic heating device of 3D printer and 3D printer

Info

Publication number: CN214983252U
Application number: CN202023258400.2U
Authority: CN
Inventors: 刘辉林; 唐京科; 陈春; 敖丹军; 曾凡发
Original assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Current assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-12-03
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses a circulation heating device and 3D printer of 3D printer, this circulation heating device include circulating line, fan and heating element, and circulating line has air intake and air outlet, and air intake and air outlet all communicate with the shaping chamber of 3D printer, and the fan is established in the air intake, and the fan is used for driving the air admission circulating line of shaping intracavity, and heating element establishes in circulating line, and heating element is used for heating the air current in the circulating line. In the in-service use process, the fan can drive the air of shaping intracavity and get into circulation pipeline from the air intake, gets into the shaping chamber from the air outlet after heating assembly heats, has realized the gaseous circulation heating function in the shaping chamber, has guaranteed to have higher temperature in the shaping chamber, avoids the phenomenon of stress inhomogeneous between the printing layer that molten material suddenly cooled down, material solidification arouses sooner, has guaranteed the printing precision of 3D printer.

Description

Cyclic heating device of 3D printer and 3D printer

Technical Field

The utility model relates to a 3D printing apparatus technical field especially relates to a circulation heating device and 3D printer of 3D printer.

Background

The most common in-line methods of 3D printers are FDM (Fused Deposition Modeling), SLS (Selective Laser Sintering), SLA (Stereo Lithography), and the most widely used is FDM. The FDM 3D printer heats and melts hot-melt materials at high temperature, extrudes the hot-melt materials through a spray head with a precise nozzle, cools and solidifies a layer of hot-melt materials after the hot-melt materials are extruded from the nozzle, and stacks the hot-melt materials into a model which is wanted by a customer under the control of a computer. The FDM technology can quickly form complex parts and better meet the market demand.

The current technical defects are as follows: the forming chamber of melting extrusion moulding 3D printer can not keep at stable temperature range, and the temperature of shower nozzle is higher, to the higher material of melting point, because ambient temperature is less than the temperature of shower nozzle far away, when the shower nozzle was extruded to the material, the melting material suddenly cools down, and the material solidifies comparatively fast, can arouse that to print stress inhomogeneous between the layer, can lead to model buckling deformation, reduces and prints the precision, leads to the product defective products can increase.

SUMMERY OF THE UTILITY MODEL

A first aim at provides a circulation heating device of 3D printer, and this circulation heating device can drive the gas circulation flow in the shaping intracavity to gas to the circulation flow heats, guarantees that the shaping intracavity has higher temperature, avoids the phenomenon of stress is inhomogeneous between the printing layer that molten material suddenly cooled down, the material solidifies and arouses sooner, has guaranteed the printing precision of 3D printer.

A second object of the utility model is to provide a 3D printer, higher temperature has in the shaping intracavity of this 3D printer, avoids the shower nozzle to extrude the melting material cooling suddenly, and the material solidifies the inhomogeneous phenomenon of stress between the printing layer that arouses sooner, has guaranteed the printing precision of 3D printer.

For realizing the above technical effect, the technical scheme of the utility model as follows:

the utility model discloses a circulation heating device of 3D printer, include: the circulating pipeline is provided with an air inlet and an air outlet, and the air inlet and the air outlet are both communicated with a forming cavity of the 3D printer; the fan is arranged in the circulating pipeline and used for driving air in the forming cavity to enter the circulating pipeline; the heating assembly is arranged in the circulating pipeline and used for heating the airflow in the circulating pipeline. The air that the fan can drive the shaping intracavity gets into circulating line from the air intake, gets into the shaping chamber from the air outlet after heating element heats, has realized the gaseous circulation heating function in the shaping chamber, has guaranteed to have higher temperature in the shaping chamber, avoids the phenomenon of stress inhomogeneous between the printing layer that molten material suddenly cooled down, material solidification arouses sooner, has guaranteed the printing precision of 3D printer.

In some embodiments, the heating assembly comprises: the fixed seat is connected to the inner side wall of the circulating pipeline; the heating plate is installed on the fixed seat. Adopt the fixing base can fix the heating plate in circulating line, can realize that the heating plate is located circulating line's intermediate position, promoted the heating effect of heating plate to the air current, avoided the energy extravagant.

In some specific embodiments, the extending direction of the fixing seat forms an included angle with the flowing direction of the airflow in the circulating pipeline. The fixing seat is obliquely arranged in the circulating pipeline which enables the heating sheet to be obliquely arranged, so that the contact area of the heating sheet and the airflow is increased, and the heating efficiency of the heating sheet is improved.

In some more specific embodiments, the extending direction of the fixed seat and the flowing direction of the airflow in the circulating pipeline form an included angle of 30-60 degrees. The contact area of the heating plate and the airflow is increased better, and the heating efficiency of the heating plate is further improved.

In some embodiments, the heating assembly further includes a limiting member, the limiting member is provided with a limiting groove, the limiting groove is matched with the heating plate, and two ends of the limiting member are respectively fixed on the fixing base. The limiting part can firmly limit the heating plate on the fixing seat, so that the installation stability of the heating plate is ensured, and the heating plate can stably heat the circulating airflow.

In some specific embodiments, the number of the limiting members is multiple, and the multiple limiting members are arranged at intervals along the length direction of the heating sheet. The plurality of limiting parts can guarantee the installation stability of the heating plate to the maximum extent, so that the working reliability of the heating plate is guaranteed to the maximum extent.

In some embodiments, a connecting flange is arranged on the outer peripheral wall of the circulating pipeline, a fixing hole is formed in the connecting flange, and the circulating pipeline is connected with the side wall of the forming cavity through a fixing piece penetrating through the fixing hole. The connecting flanging is connected to the forming cavity through the fixing piece, so that the connecting stability of the circulating pipeline and the forming cavity is ensured, the phenomenon that the circulating pipeline falls off from the side wall of the forming cavity in the working process is avoided, and the working reliability of the whole circulation heating device is ensured.

The utility model also discloses a 3D printer, include as before the circulation heating device of 3D printer. This 3D printer is printing the in-process, and the forced circulation heating can be realized under the effect of the circulation heating device of 3D printer to the air current of shaping chamber, has guaranteed that the shaping intracavity is in all the time under higher and comparatively stable temperature, avoids the phenomenon of stress inhomogeneous between the printing layer that molten material suddenly cooled down, material solidification arouses sooner, has guaranteed the printing precision of 3D printer.

In some embodiments, the number of the circulating heating devices of the 3D printer is two, and the circulating heating devices of the two 3D printers are respectively installed on two opposite side walls of the forming cavity. The circulation heating device of two 3D printers has ensured the temperature homogeneity in the shaping intracavity, has avoided the phenomenon of local overheat or local supercooling to appear in the shaping intracavity to take place to the printing precision of 3D printer has been guaranteed.

In some embodiments, the 3D printer further comprises a temperature detector disposed within the molding cavity to measure a temperature within the molding cavity. The temperature that the temperature detected the piece can real time monitoring shaping intracavity to give the control chip of 3D printer with the temperature feedback of shaping intracavity, control chip can be according to the operating condition of temperature detection piece's testing result control heating plate, guarantees that the shaping chamber is in the temperature of comparatively doing things all the time, thereby guarantees the printing precision of 3D printer.

The utility model discloses cyclic heating device and 3D printer of 3D printer, because the air that the fan can drive the shaping intracavity gets into circulating line from the air intake, gets into the shaping chamber from the air outlet after heating element heats, realized shaping intracavity gas circulation heating function, guaranteed to have higher temperature in the shaping chamber, avoid the molten material to cool down suddenly, the material solidifies the inhomogeneous phenomenon of stress between the printing layer that arouses sooner, guaranteed the printing precision of 3D printer.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a circulation heating device of a 3D printer according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of another direction of the circulation heating device of the 3D printer according to the first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a heating assembly according to a first embodiment of the present invention.

Fig. 4 is a schematic structural view of another direction of the heating assembly according to the first embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a 3D printer according to the second embodiment of the present invention.

Reference numerals:

1. a circulation pipe; 11. an air inlet; 12. an air outlet; 13. connecting the flanging; 131. a fixing hole;

2. a fan;

3. a heating assembly; 31. a fixed seat; 32. a heating plate; 33. a limiting member;

100. and forming a cavity.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, it is to be understood that the terms "inside", "outside", "length", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically coupled, may be directly coupled, or may be indirectly coupled through an intermediary. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

the specific structure of the circulation heating device of the 3D printer according to the embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1-4, the circulation heating device of the 3D printer of this embodiment includes a circulation pipeline 1, a blower 2 and a heating element 3, the circulation pipeline 1 has an air inlet 11 and an air outlet 12, both the air inlet 11 and the air outlet 12 are communicated with a forming cavity 100 of the 3D printer, the blower 2 is disposed in the circulation pipeline 1, the blower 2 is used for driving air in the forming cavity 100 to enter the circulation pipeline 1, the heating element 3 is disposed in the circulation pipeline 1, and the heating element 3 is used for heating air flow in the circulation pipeline 1. In 3D printer working process, fan 2 can drive the air in the shaping chamber 100 and get into circulating line 1 from air intake 11, the air gets into shaping chamber 100 from air outlet 12 after heating assembly 3 heats, the gaseous circulation heating in shaping chamber 100 has been realized, higher temperature has been guaranteed to have in shaping chamber 100, make and print shower nozzle spun melting material still be in a temperature relatively higher shaping chamber 100, just so avoid melting material cooling suddenly, the material solidifies the inhomogeneous phenomenon of stress between the printing layer that arouses sooner, the printing precision of 3D printer has been guaranteed.

Specifically, as shown in fig. 3 to 4, the heating assembly 3 includes a fixing seat 31, a heating plate 32 and a limiting member 33, the fixing seat 31 is connected to an inner sidewall of the circulation duct 1, and the heating plate 32 is mounted on the fixing seat 31. The limiting member 33 is provided with a limiting groove, the limiting groove is matched with the heating sheet 32, and two ends of the limiting member 33 are respectively fixed on the fixing seat 31. Adopt fixing base 31 to fix heating plate 32 in circulating line 1, fixing base 31 can set up heating plate 32 and circulating line 1's inside wall interval, realizes that heating plate 32 is located circulating line 1's intermediate position, has promoted heating plate 32 to the heating effect and the heating efficiency of air current, has avoided the energy extravagant. The added limiting member 33 can firmly limit the heating sheet 32 on the fixed seat 31, so that the installation stability of the heating sheet 32 is ensured, and the heating sheet 32 can stably heat the circulating air flow. In the present embodiment, the number of the stoppers 33 is two, and the two stoppers 33 are disposed at intervals along the longitudinal direction of the heating sheet 32.

Preferably, as shown in fig. 1, the extending direction of the fixed seat 31 forms an included angle with the flowing direction of the air flow in the circulating pipeline 1, and the extending direction of the fixed seat 31 forms an included angle of 30 ° to 60 ° with the flowing direction of the air flow in the circulating pipeline 1. Because the heating plate 32 is fixed on the fixing seat 31, the fixing seat 31 is obliquely arranged in the circulating pipeline 1, that is to say, in the circulating pipeline 1 in which the heating plate 32 is also obliquely arranged, the obliquely arranged heating plate 32 can increase the contact area between the airflow and the heating plate 32, and the heating efficiency of the heating plate 32 is improved.

In this embodiment, as shown in fig. 2, the outer peripheral wall of the circulation pipe 1 is further provided with a connecting flange 13, the connecting flange 13 is provided with a fixing hole 131, and the circulation pipe 1 is connected with the side wall of the molding cavity 100 through a fixing member inserted into the fixing hole 131. The connecting flange 13 is connected to the molding cavity 100 through the fixing piece, so that the connection stability of the circulating pipeline 1 and the molding cavity 100 is ensured, the phenomenon that the circulating pipeline 1 falls off from the side wall of the molding cavity 100 in the working process is avoided, and the working reliability of the whole circulation heating device is ensured.

Example two:

the following describes a specific structure of the 3D printer according to an embodiment of the present invention with reference to fig. 5.

As shown in fig. 5, the 3D printer includes a printer body and a circulation heating device of the 3D printer. The printer body has the molding cavity 100, and the circulation heating device of 3D printer is two, and the circulation heating device of two 3D printers is installed respectively on two lateral walls of the relative setting of molding cavity 100. At the 3D printer in-process of printing, the forced circulation heating can be realized under the effect of the circulation heating device of 3D printer to the air current of molding cavity 100, has guaranteed to be in all the time in molding cavity 100 under higher and comparatively stable temperature, avoids the phenomenon of stress inhomogeneous between the printing layer that molten material suddenly cooled down, material solidification aroused very fast, has guaranteed the printing precision of 3D printer. And circulation heating device is two, and two circulation heating device establish respectively on two relative lateral walls that set up of molding cavity 100, and two circulation heating device can be to the even heating of air in the molding cavity 100 like this, avoid appearing local overheat or local supercooling's phenomenon in the molding cavity 100, have guaranteed that the solidification rate that prints shower nozzle spun and be in different positions melting material is similar to the printing precision of 3D printer has been promoted.

Preferably, the 3D printer of this embodiment further includes a temperature detecting member disposed in the molding cavity 100. Temperature detection spare can real time monitoring become the temperature in the die cavity 100 to the control chip of 3D printer is fed back to the temperature in the die cavity 100, and control chip can be according to the operating condition of temperature detection spare's testing result control heating plate 32, guarantees to become die cavity 100 and is in comparatively suitable temperature all the time, thereby guarantees the printing precision of 3D printer.

In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A circulation heating device of 3D printer, its characterized in that includes:

the device comprises a circulating pipeline (1), wherein the circulating pipeline (1) is provided with an air inlet (11) and an air outlet (12), and the air inlet (11) and the air outlet (12) are both communicated with a forming cavity (100) of the 3D printer;

the fan (2) is arranged in the circulating pipeline (1), and the fan (2) is used for driving air in the molding cavity (100) to enter the circulating pipeline (1);

the heating assembly (3), the heating assembly (3) is established in the circulating line (1), the heating assembly (3) is used for heating the air current in the circulating line (1).

2. Circulation heating device of a 3D printer according to claim 1, characterized in that the heating assembly (3) comprises:

the fixed seat (31), the said fixed seat (31) is connected to the inside wall of the said circulating line (1);

the heating plate (32), the heating plate (32) is installed on the fixing base (31).

3. A circulation heating device for a 3D printer according to claim 2, characterized in that the extension direction of the fixing base (31) is arranged at an angle to the flow direction of the air flow in the circulation duct (1).

4. A circulation heating device of a 3D printer according to claim 3, characterized in that the extension direction of the fixing base (31) makes an angle of 30-60 ° with the flow direction of the air flow in the circulation duct (1).

5. The circulation heating device of the 3D printer according to claim 2, wherein the heating assembly (3) further comprises a limiting member (33), a limiting groove is formed in the limiting member (33), the limiting groove is matched with the heating plate (32), and two ends of the limiting member (33) are respectively fixed on the fixing seat (31).

6. The circulation heating device of the 3D printer according to claim 5, wherein the limiting member (33) is provided in plurality, and the plurality of limiting members (33) are arranged at intervals along the length direction of the heating sheet (32).

7. The circulation heating device of the 3D printer according to claim 1, wherein a connecting flange (13) is arranged on the outer peripheral wall of the circulation pipeline (1), a fixing hole (131) is arranged on the connecting flange (13), and the circulation pipeline (1) is connected with the side wall of the forming cavity (100) through a fixing piece arranged in the fixing hole (131) in a penetrating manner.

8. A3D printer comprising the cyclic heating apparatus of the 3D printer according to any one of claims 1 to 7.

9. The 3D printer according to claim 8, characterized in that the number of the cyclic heating devices of the 3D printer is two, and the cyclic heating devices of the two 3D printers are respectively mounted on two opposite side walls of the forming cavity (100).

10. The 3D printer according to claim 8, characterized in that the 3D printer further comprises a temperature detection member provided inside the forming cavity (100) to measure the temperature inside the forming cavity (100).