CN221851172U - A positive and negative pressure system for 3D printing device - Google Patents

Abstract

The utility model relates to the technical field of 3D printing, in particular to a positive and negative pressure system for a 3D printing device, which comprises a shell, wherein a negative pressure group is arranged on one side of the interior of the shell, a positive pressure ink supply group is fixed on one side of the interior of the shell, which is positioned on the negative pressure group, the positive pressure ink supply group consists of a fixing sheet and an ink supply pump, the fixing sheet is fixedly connected to the surface of the shell through bolts, and a plurality of groups of ink supply pumps are fixed on the surface of the fixing sheet; a filtering group is arranged on one side of the positive pressure ink supply group and fixedly connected to the surface of the shell; the bottom of the shell is also provided with a plurality of groups of ink boxes provided with liquid level sensors. The utility model improves the degree of automation, does not need manual auxiliary operation in the whole process, reduces the labor intensity and improves the working efficiency; and because the whole gluing process is automatically completed by a machine, no manual operation exists in the middle, and the use is more convenient.

Description

A positive and negative pressure system for 3D printing device

Technical Field

The utility model relates to the technical field of 3D printing, in particular to a positive and negative pressure system for a 3D printing device.

Background Art

A 3D printing device is a device that heats the printing material to the melting point and sprays it out through a nozzle. The nozzle moves along the path of each layer and piles up the printing material layer by layer until the entire object is manufactured. In the 3D printing device, a positive and negative pressure system is required to complete the printing operation.

The positive and negative pressure systems of existing 3D printing devices require manual operation when in use, have a low degree of automation, and are labor-intensive, which reduces the working efficiency of the 3D printing device during printing; and because the entire gluing process requires manual operation, it is not convenient to use, which causes great trouble to people's use.

Utility Model Content

The purpose of the utility model is to provide a positive and negative pressure system for a 3D printing device, so as to solve the problems of low working efficiency and inconvenience in use proposed in the above-mentioned background technology.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positive and negative pressure system for a 3D printing device, comprising a shell, a negative pressure group is installed on one side of the shell, a positive pressure ink supply group is fixed inside the shell and on one side of the negative pressure group, the positive pressure ink supply group is composed of a fixing plate and an ink supply pump, the fixing plate is fixedly connected to the surface of the shell by bolts, and a plurality of ink supply pumps are fixed to the surface of the fixing plate; a filter group is arranged on one side of the positive pressure ink supply group, and the filter group is fixedly connected to the surface of the shell; a plurality of ink cartridges equipped with liquid level sensors are also installed on the bottom of the shell.

Preferably, the negative pressure group is composed of a negative pressure gas tank, a negative pressure bottom plate, a negative pressure base plate, a pressure sensor and a negative pressure pump. The negative pressure gas tank is provided in three groups, and the three groups of negative pressure gas tanks are fixedly connected to the surface of the shell by screws.

Preferably, three groups of the negative pressure bottom plates are provided, and the three groups of negative pressure bottom plates are fixedly connected to the surface of the shell by bolts, and the surfaces of the negative pressure bottom plates are all installed with negative pressure base plates.

Preferably, the pressure sensors are provided in four groups, the four groups of pressure sensors are divided into two rows, and the pressure sensors are fixedly connected to the surface of the negative pressure bottom plate; the surface of the negative pressure bottom plate is also equipped with two groups of negative pressure pumps placed side by side, and the negative pressure pumps are connected to the interconnected ink cartridges through ink tubes.

Preferably, the filter group is composed of a mounting card and a filter, the mounting card is fixedly connected to the surface of the shell, and the surface of the mounting card is clamped with a filter, the input end of the filter is communicated with the output end of the ink supply pump through an ink tube, and the output end of the filter is communicated with the ink inlet of the ink cartridge through the ink tube.

Compared with the prior art, the beneficial effects of the utility model are as follows: the 3D printing device uses a positive and negative pressure system by setting a negative pressure group and a positive pressure ink supply group; when implemented, ink is supplied through the positive pressure ink supply group, and the ink supply pump on the surface of the fixed plate is started during ink supply, and the ink is supplied to the ink cartridge after being filtered by a filter installed on a card board. At this time, the ink cartridge is under normal pressure, and the ink automatically drips from the nozzle assembly under the action of liquid delivery pressure and gravity and gradually empties the gas in the ink cartridge and the pipeline until the liquid level sensor detects that the amount of ink in the ink cartridge reaches a high liquid level, and the ink supply pump stops supplying ink. After stopping the ink supply, negative pressure printing is started using the negative pressure group. During the negative pressure printing process, the negative pressure group provides negative pressure for the ink cartridge. When the negative pressure value reaches the working value of the nozzle, the ink supply pump stops supplying ink. When the pressure is negative, the pressure between the nozzle and the ink cartridge is balanced, the nozzle stops dripping ink and there is no ink return in the ink supply tube between the nozzle and the ink cartridge, the nozzle starts, and the nozzle starts inkjet printing under the action of its own internal excitation voltage; when the liquid level sensor detects that the amount of ink in the ink cartridge has reached the lower limit, the ink supply pump starts again to supply ink to the ink cartridge until the high liquid level is reached, the ink supply pump stops, and the nozzle continues to print ink, so the ink supply pump repeatedly supplies ink, and the nozzle continues to print ink; therefore, the utility model improves the degree of automation, does not require manual auxiliary operation in the whole process, reduces labor intensity, and improves work efficiency; and because the whole gluing process is automatically completed by the machine, there is no manual operation in the middle, and it is more convenient to use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a three-dimensional front view structure of the utility model;

FIG2 is a schematic diagram of a three-dimensional rear view structure of the utility model;

FIG3 is a schematic diagram of a partially exploded enlarged structure of the utility model.

In the figure: 1. Shell; 2. Negative pressure group; 21. Negative pressure gas tank; 22. Negative pressure bottom plate; 23. Negative pressure substrate; 24. Pressure sensor; 25. Negative pressure pump; 3. Positive pressure ink supply group; 31. Fixing plate; 32. Ink supply pump; 4. Filter group; 41. Mounting card; 42. Filter; 5. Ink cartridge.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

The structure of a positive and negative pressure system for a 3D printing device provided by the utility model is shown in Figures 1 and 3, comprising a shell 1, a negative pressure group 2 is installed on one side of the interior of the shell 1, the negative pressure group 2 is composed of a negative pressure gas tank 21, a negative pressure bottom plate 22, a negative pressure substrate 23, a pressure sensor 24 and a negative pressure pump 25, three groups of negative pressure gas tanks 21 are provided, and the three groups of negative pressure gas tanks 21 are fixedly connected to the surface of the shell 1 by screws, three groups of negative pressure bottom plates 22 are provided, and the three groups of negative pressure bottom plates 22 are fixedly connected to the surface of the shell 1 by bolts, and the surface of the negative pressure bottom plates 22 are all installed with negative pressure substrates 23, four groups of pressure sensors 24 are provided, and the four groups of pressure sensors 24 are divided into two rows, upper and lower, and the pressure sensors 24 are fixedly connected to the surface of the negative pressure bottom plate 22; two groups of negative pressure pumps 25 placed side by side are also installed on the surface of the negative pressure bottom plate 22, and the negative pressure pumps 25 are connected to the ink cartridges 5 connected to each other through ink tubes.

During implementation, negative pressure printing is started using the negative pressure group 2. During the negative pressure printing process, the negative pressure group 2 provides negative pressure for the ink cartridge 5. When the negative pressure value reaches the negative pressure value of the nozzle, the pressure between the nozzle and the ink cartridge 5 is balanced, the nozzle stops dripping ink, and there is no ink return in the ink supply tube between the nozzle and the ink cartridge 5. The nozzle is started, and the nozzle starts inkjet printing under the action of its own internal excitation voltage.

Further, as shown in Figures 2 and 3, a positive pressure ink supply group 3 is fixed inside the shell 1 and on one side of the negative pressure group 2. The positive pressure ink supply group 3 is composed of a fixing plate 31 and an ink supply pump 32. The fixing plate 31 is fixedly connected to the surface of the shell 1 by bolts, and a plurality of ink supply pumps 32 are fixed to the surface of the fixing plate 31; a filter group 4 is provided on one side of the positive pressure ink supply group 3. The filter group 4 is fixedly connected to the surface of the shell 1. The filter group 4 is composed of a mounting card 41 and a filter 42. The mounting card 41 is fixedly connected to the surface of the shell 1, and a filter 42 is mounted on the surface of the mounting card 41. The input end of the filter 42 is communicated with the output end of the ink supply pump 32 through an ink tube, and the output end of the filter 42 is communicated with the ink inlet of the ink cartridge 5 through the ink tube; a plurality of ink cartridges 5 equipped with liquid level sensors are also installed at the bottom of the shell 1.

During implementation, ink is supplied through the positive pressure ink supply group 3. When supplying ink, the ink supply pump 32 on the surface of the fixed plate 31 is started, and the ink is filtered by the filter 42 mounted on the mounting card 41 and then supplied to the ink cartridge 5. At this time, the ink cartridge 5 is under normal pressure, and the ink automatically drips from the nozzle assembly under the action of liquid delivery pressure and gravity and gradually empties the gas in the ink cartridge 5 and the pipeline until the liquid level sensor detects that the amount of ink in the ink cartridge 5 reaches a high liquid level, and the ink supply pump 32 stops supplying ink.

Working principle: When in use, ink is supplied through the positive pressure ink supply group 3. When supplying ink, the ink supply pump 32 on the surface of the fixed plate 31 is started, and the ink is filtered by the filter 42 mounted on the mounting card 41 and then supplied to the ink cartridge 5. At this time, the ink cartridge 5 is under normal pressure. Under the action of liquid delivery pressure and gravity, the ink automatically drips from the nozzle assembly and gradually empties the gas in the ink cartridge 5 and the pipeline until the liquid level sensor detects that the amount of ink in the ink cartridge 5 reaches the high liquid level, and the ink supply pump 32 stops supplying ink.

After the ink supply is stopped, negative pressure printing is started using the negative pressure group 2. During the negative pressure printing process, the negative pressure group 2 provides negative pressure for the ink cartridge 5. When the negative pressure value reaches the negative pressure value of the nozzle, the pressure between the nozzle and the ink cartridge 5 is balanced, the nozzle stops dripping ink, and there is no ink return in the ink supply tube between the nozzle and the ink cartridge 5. The nozzle is started, and the nozzle starts inkjet printing under the action of its own internal excitation voltage; when the liquid level sensor detects that the ink amount in the ink cartridge 5 reaches the lower limit, the ink supply pump 32 is turned on again to supply ink to the ink cartridge 5 until the high liquid level is reached, and the ink supply pump 32 stops, while the nozzle continues to print ink. In this way, the ink supply pump 32 repeatedly supplies ink, and the nozzle continues to print ink, and finally the use of the positive and negative pressure system is completed.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention.

Claims (5)

1. A positive and negative pressure system for a 3D printing device, comprising a shell (1), characterized in that: a negative pressure group (2) is installed on one side of the shell (1), a positive pressure ink supply group (3) is fixed inside the shell (1) and located on one side of the negative pressure group (2), the positive pressure ink supply group (3) is composed of a fixing plate (31) and an ink supply pump (32), the fixing plate (31) is fixedly connected to the surface of the shell (1) by bolts, and a plurality of groups of ink supply pumps (32) are fixed to the surface of the fixing plate (31); a filter group (4) is arranged on one side of the positive pressure ink supply group (3), and the filter group (4) is fixedly connected to the surface of the shell (1); and a plurality of groups of ink cartridges (5) equipped with liquid level sensors are also installed at the bottom of the shell (1). 2. A positive and negative pressure system for a 3D printing device according to claim 1, characterized in that: the negative pressure group (2) is composed of a negative pressure gas tank (21), a negative pressure bottom plate (22), a negative pressure base plate (23), a pressure sensor (24) and a negative pressure pump (25), and the negative pressure gas tank (21) is provided with three groups, and the three groups of negative pressure gas tanks (21) are fixedly connected to the surface of the shell (1) by screws. 3. According to claim 2, a positive and negative pressure system for a 3D printing device is characterized in that: the negative pressure bottom plate (22) is provided with three groups, and the three groups of negative pressure bottom plates (22) are fixedly connected to the surface of the shell (1) by bolts, and the surface of the negative pressure bottom plate (22) is installed with a negative pressure base plate (23). 4. A positive and negative pressure system for a 3D printing device according to claim 3, characterized in that: the pressure sensors (24) are provided in four groups, the four groups of pressure sensors (24) are divided into two rows, and the pressure sensors (24) are fixedly connected to the surface of the negative pressure bottom plate (22); the surface of the negative pressure bottom plate (22) is also equipped with two groups of negative pressure pumps (25) placed side by side, and the negative pressure pumps (25) are connected to the corresponding ink cartridges (5) through ink tubes. 5. A positive and negative pressure system for a 3D printing device according to claim 1, characterized in that: the filter group (4) is composed of a mounting card plate (41) and a filter (42), the mounting card plate (41) is fixedly connected to the surface of the housing (1), and the filter (42) is mounted on the surface of the mounting card plate (41), the input end of the filter (42) is communicated with the output end of the ink supply pump (32) through an ink tube, and the output end of the filter (42) is communicated with the ink inlet of the ink cartridge (5) through the ink tube.