Automatic particle conveying device of 3D printer

Abstract

The utility model discloses an automatic particle conveying device of a 3D printer, and belongs to the field of 3D printers. Comprising a feeding bin and a printing head with a storage bin. The feeding bin is connected with the storage bin through a transmission pipe; wherein the conveying pipe is divided into a material falling pipe and a material blowing pipe, a switch valve is arranged between the material falling pipe and the feeding bin, a pneumatic spray head is arranged at the position, close to the feeding bin, of the material falling pipe, and air outlet holes are formed in the bin wall of the material storage bin. The device has the beneficial effects that an intermittent feeding mode can be formed according to the switching valve, the pneumatic spray head with the electromagnetic valve and the non-metal sensor; when the non-metal sensor detects that no material exists in the storage bin, the pneumatic nozzle is opened to blow the granular material in the blanking pipe into the storage bin, and the switch valve is closed at the same time; after the materials are conveyed, the pneumatic spray head is closed, the switch valve is automatically opened without the impact force of gas, and the granules can enter the blanking pipe again, so that the preparation for conveying the granules next time is facilitated; and the use is very convenient.

Description

Technical Field

[0001] The utility model relates to an automatic conveying device for granular materials of a 3D printer, belonging to the field of 3D printers. Background Art

[0002] 3D printing (3DP), also known as additive manufacturing technology, is a technology for manufacturing solid parts by the method of layer-by-layer material accumulation based on three-dimensional CAD data;

[0003] Currently, the materials used in 3D printing are linear materials. After the linear materials are melted, they enter the print head 2, and the print head 2 extrudes or sprays the molten materials, and then forms a product layer by layer according to the set program;

[0004] Now, the linear materials are changed to granular materials. The granular materials are easier to melt than the linear materials, which can reduce costs. However, when using granular materials, the original linear material transmission structure is no longer applicable, so a new conveying structure needs to be designed for the addition of granular materials. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an automatic conveying device for granular materials of a 3D printer, which can effectively solve the above problems.

[0006] In order to solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] It includes a feeding bin and a print head with a storage bin; the feeding bin is connected to the storage bin through a transmission pipe; wherein, the transmission pipe is divided into a blanking pipe and a blowing pipe, a switching valve is arranged between the blanking pipe and the feeding bin, and a pneumatic nozzle is arranged at a position of the blanking pipe close to the feeding bin, and air outlet holes are arranged on the wall of the storage bin.

[0008] Further: The switching valve includes a mounting plate, a blanking hole is arranged in the middle of the mounting plate, a mounting shaft is arranged in the middle of the blanking hole, a first baffle and a second baffle are hinged on the mounting shaft, after the switching valve is closed, the first baffle and the second baffle are symmetrically arranged on both sides of the mounting shaft; the first baffle is rotationally arranged on the mounting shaft through a first hinge cylinder, the second baffle is rotationally arranged on the mounting shaft through a second hinge cylinder, and the first hinge cylinder and the second hinge cylinder are arranged in a staggered manner.

[0009] Further: A feeding hole is arranged in the middle of the bottom of the storage bin, and a non-metallic sensor is arranged on the wall of the storage bin, and the model of the non-metallic sensor is SW-WL-T201.

[0010] Further: An installation groove penetrating through the storage bin is provided on the bin wall of the storage bin, the air outlet hole is fixed on the bin wall of the storage bin through a vertical plate, and the vertical plate is fixed in the installation groove.

[0011] Further: A connecting piece is provided between the blowing pipe and the storage bin. The cross-section of the connection part between the connecting piece and the blowing pipe is circular, and the cross-section of the connection part between the connecting piece and the storage bin is rectangular.

[0012] Further: The blanking pipe and the blowing pipe are directly connected through a connector, and connection holes are provided at the upper and lower ends of the connector.

[0013] The beneficial effects are as follows:

[0014] According to the switch valve, the pneumatic nozzle with an electromagnetic valve, and the non-metallic sensor, an intermittent feeding method can be formed; when the non-metallic sensor detects that there is no material in the storage bin, the pneumatic nozzle opens, and the granular material in the blanking pipe is blown into the storage bin, and at the same time the switch valve closes; after the material transmission is completed, the pneumatic nozzle closes, and the switch valve automatically opens after the impact force of the gas disappears, and the granular material will enter the blanking pipe again, facilitating the preparation for the next transmission of the granular material; it is very convenient to use. Description of the Drawings

[0015] For ease of explanation, the present invention will be described in detail by the following specific embodiments and accompanying drawings.

[0016] Figure 1 is a structural schematic diagram of the present invention;

[0017] Figure 2 is a part drawing of the feeding bin of the present invention

[0018] Figure 3 is Figure 2 a partial enlarged view in

[0019] Figure 4 is a diagram of the closed state of the switch valve of the present invention;

[0020] Figure 5 is a diagram of the internal structure of the storage bin of the present invention.

[0021] Description of the reference numerals:

[0022] 1. Feeding bin; 2. Print head; 3. Storage bin; 31. Material conveying hole; 32. Non-metallic sensor; 33. Installation groove; 34. Vertical plate; 4. Transmission pipe; 41. Blanking pipe; 42. Blowing pipe; 43. Connector; 5. Switch valve; 51. Installation plate; 52. Blanking hole; 53. Installation shaft; 54. First baffle; 55. Second baffle; 56. First hinge cylinder; 57. Second hinge cylinder; 6. Pneumatic nozzle; 7. Air outlet hole; 8. Connecting piece. Detailed implementation mode

[0023] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0024] It should be noted that in the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0026] Meanwhile, in the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Refer to Figures 1-5 An embodiment of an automatic conveying device for granular materials of a 3D printer according to the present utility model,

[0028] Specifically, it includes a feeding bin 1 and a print head 2 with a storage bin 3; the feeding bin 1 is connected to the storage bin 3 through a transmission pipe 4; when in use, the granular materials are put into the feeding bin 1, and the materials in the feeding bin 1 will enter the storage bin 3 through the transmission pipe 4, and then enter the hot melting device of the print head 2 from the storage bin 3, and finally the print head 2 extrudes the hot melted material to make finished products; in this process, it is necessary to control the transmission time and transmission speed of the granular materials so as to match the printing speed of the print head 2;

[0029] Therefore, the transmission pipe 4 is divided into a blanking pipe 41 and a blowing pipe 42. A switching valve 5 is arranged between the blanking pipe 41 and the feeding bin 1, and a pneumatic nozzle 6 is arranged at a position of the blanking pipe 41 close to the feeding bin 1, and an electromagnetic valve, an air pump and an air tank are equipped for the pneumatic nozzle 6. Air outlet holes 7 are arranged on the wall of the storage bin 3.

[0030] First, open the switch valve 5. At this time, the granular material in the feeding bin 1 will enter the lower drop pipe 41 due to gravity. At this time, the pneumatic nozzle 6 is opened through the solenoid valve control. The pneumatic nozzle 6 blows a high-speed airflow into the drop pipe 41. The airflow will drive the granular material along the drop pipe 41 into the blowing pipe 42, and then enter the storage bin 3 from the blowing pipe 42 to complete the addition of materials; at this time, the setting of the air outlet 7 is mainly to output the airflow blown in by the pneumatic nozzle 6, and also to balance the air pressure in the transmission pipe 4, so that the transmission pipe 4 can form an airflow to drive the granular material to be blown into the storage bin 3.

[0031] The present device improves the structure of the switch valve 5, and the switch valve 5 is automatically closed when blowing. Specifically, the switch valve 5 includes a mounting plate 51, a blanking hole 52 is provided in the middle of the mounting plate 51, a mounting shaft 53 is provided in the middle of the blanking hole 52, a first baffle plate 54 and a second baffle plate 55 are hinged on the mounting shaft 53, and after the switch valve 5 is closed, the first baffle plate 54 and the second baffle plate 55 are symmetrically arranged on both sides of the mounting shaft 53; the first baffle plate 54 is rotatably arranged on the mounting shaft 53 through the first hinge tube 56, and the second baffle plate 55 is rotatably arranged on the mounting shaft 53 through the second hinge tube 57, and the first hinge tube 56 and the second hinge tube 57 are staggered.

[0032] The switch valve 5 of the device is not an electrically controlled switch. When there are granular materials in the feeding bin 1, the granular materials will automatically open the first baffle 54 and the second baffle 55 of the switch valve 5 by gravity, and then fall into the drop pipe 41;

[0033] When the first baffle plate 54 and the second baffle plate 55 open the blanking hole 52, the first baffle plate 54 and the second baffle plate 55 are in an inclined state due to the arrangement of the first hinge cylinder 56 and the second hinge cylinder 57;

[0034] At this time, the solenoid valve of the pneumatic nozzle 6 is opened, the pneumatic nozzle 6 is started, and high-pressure gas is introduced into the drop pipe 41. The gas will drive the granular material to move in the drop pipe 41, and most of the material will enter the blowing pipe 42, but very little granular material will return to the feeding bin 1. At the same time, the gas will also impact the first baffle 54 and the second baffle 55. The inclined first baffle 54 and the second baffle 55 will automatically close when impacted by the airflow, blocking the drop hole 52 to prevent the airflow from continuously rushing into the feeding bin 1.

[0035] A feeding hole 31 is arranged in the middle of the bottom of the storage bin 3, and a non-metallic sensor 32 is arranged on the bin wall of the storage bin 3. The model of the non-metallic sensor 32 is SW-WL-T201.

[0036] The non-metallic sensor 32 of this device is mainly used to detect the granular material in the storage bin 3. The specific detection method can refer to the instruction manual of this model. This non-metallic sensor 32 can set the detection range of the granular material. When no granular material is detected, it will send a signal to the main control board, and then the main control board will control the solenoid valve to open. The opening time is also calculated and can just fill the storage bin 3 with the falling granular material;

[0037] Therefore, according to the on-off valve 5, the pneumatic nozzle 6 with a solenoid valve, and the non-metallic sensor 32, an intermittent feeding method can be formed; when the non-metallic sensor 32 detects that there is no material in the storage bin 3, the pneumatic nozzle 6 opens, and the granular material in the blanking pipe 41 is blown into the storage bin 3, and at the same time the on-off valve 5 closes;

[0038] After the material transmission is completed, the pneumatic nozzle 6 closes, and the on-off valve 5 automatically opens after the impact force of the gas disappears, and the granular material will enter the blanking pipe 41 again, preparing for the next transmission of the granular material.

[0039] An installation groove 33 penetrating the storage bin 3 is provided on the bin wall of the storage bin 3. The air outlet 7 is fixed to the bin wall of the storage bin 3 through a vertical plate 34, and the vertical plate 34 is fixed in the installation groove 33.

[0040] Since there is dust in the granular material and the gas, the air outlet 7 will be blocked by dust after long-term use. Therefore, the vertical plate 34 is designed to be easily disassembled for cleaning.

[0041] A connecting piece 8 is provided between the blowing pipe 42 and the storage bin 3. The cross-section of the connection between the connecting piece 8 and the blowing pipe 42 is circular, and the cross-section of the connection between the connecting piece 8 and the storage bin 3 is rectangular.

[0042] The connecting piece 8 of this device is mainly to expand the output area. Compared with only using the blowing pipe 42 to connect the storage bin 3, the feeding is faster.

[0043] The blanking pipe 41 and the blowing pipe 42 are directly connected through a connector 43, and connection holes are provided at the upper and lower ends of the connector 43.

[0044] The connector 43 of this device is mainly to limit the output direction of the granular material in the blanking pipe 41 and the feeding direction into the blowing pipe 42; the reason for such a setting is that in the entire 3D printing device, there is also a mechanism for controlling the multi-axis movement of the print head 2, so that the blowing pipe 42 can form an arch to bypass these mechanisms.

[0045] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to exhaustively list all implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of this utility model creation.

Claims

1. An automatic conveying device for granular materials of a 3D printer, characterized in that: It includes a feeding bin (1) and a print head (2) with a storage bin (3); a transmission pipe (4) is connected between the feeding bin (1) and the storage bin (3); wherein, the transmission pipe (4) is divided into a blanking pipe (41) and a blowing pipe (42), a switching valve (5) is arranged between the blanking pipe (41) and the feeding bin (1), and a pneumatic spray head (6) is arranged at a position of the blanking pipe (41) close to the feeding bin (1), and an air outlet hole (7) is arranged on the wall of the storage bin (3).

2. The automatic conveying device for granular materials of the 3D printer according to claim 1, characterized in that: The switching valve (5) includes a mounting plate (51), a blanking hole (52) is arranged in the middle of the mounting plate (51), a mounting shaft (53) is arranged in the middle of the blanking hole (52), a first baffle plate (54) and a second baffle plate (55) are hinged on the mounting shaft (53), after the switching valve (5) is closed, the first baffle plate (54) and the second baffle plate (55) are symmetrically arranged on both sides of the mounting shaft (53); the first baffle plate (54) is rotatably arranged on the mounting shaft (53) through a first hinge cylinder (56), the second baffle plate (55) is rotatably arranged on the mounting shaft (53) through a second hinge cylinder (57), and the first hinge cylinder (56) and the second hinge cylinder (57) are arranged in a staggered manner.

3. The automatic conveying device for pellets of the 3D printer according to claim 2, characterized in that: A material conveying hole (31) is arranged at the middle part of the bottom of the storage bin (3), a non-metal sensor (32) is arranged on the wall of the storage bin (3), and the model of the non-metal sensor (32) is SW-WL-T201.

4. The automatic conveying device for pellets of the 3D printer according to claim 3, characterized in that: An installation groove (33) penetrating through the storage bin (3) is arranged on the wall of the storage bin (3), the air outlet hole (7) is fixed on the wall of the storage bin (3) through a vertical plate (34), and the vertical plate (34) is fixed in the installation groove (33).

5. The automatic conveying device for 3D printer pellets according to claim 1, wherein: A connecting piece (8) is arranged between the blowing pipe (42) and the storage bin (3), the cross section of the connection part of the connecting piece (8) and the blowing pipe (42) is circular, and the cross section of the connection part of the connecting piece (8) and the storage bin (3) is rectangular.

6. The automatic conveying device for granular materials of the 3D printer according to claim 1, characterized in that: The blanking pipe (41) and the blowing pipe (42) are directly connected through a connector (43), and connecting holes are arranged at the upper and lower ends of the connector (43).

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