CN210706095U

CN210706095U - 3D printer sand material circulating device

Info

Publication number: CN210706095U
Application number: CN201921442421.4U
Authority: CN
Inventors: 韩聪; 李亦农; 袁纯国; 黄慧宇
Original assignee: Foshan Hanyu Technology Co ltd
Current assignee: Foshan Hanyu Technology Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-06-09
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a 3D printer sand material circulating device, which comprises a recovery hopper, a new sand box, a mixing hopper and a negative pressure absorption device; the negative pressure absorption device comprises a collection box, the collection box is provided with a collection cavity, the collection cavity is provided with an upper cavity part and a lower cavity part, the upper cavity part is provided with a sand inlet and an air outlet, the lower cavity part is provided with a used sand outlet, the outer side of the air outlet is connected with a negative pressure generator, the air outlet is provided with a first filter, and a first valve is arranged between the upper cavity part and the lower cavity part; the bottom of the recovery hopper is provided with a sand outlet which is communicated with the sand inlet through a connecting pipeline. When in use, the first valve is closed, the negative pressure generator is started, and the used sand in the recovery hopper is sucked to the upper part of the collection cavity under the action of negative pressure; and then closing the negative pressure generator, opening the first valve, enabling the used sand to fall to the lower part of the collection cavity, flowing into the mixing hopper from the used sand outlet, mixing with new sand in the mixing hopper, and feeding the mixed sand to the 3D printer for printing.

Description

3D printer sand material circulating device

Technical Field

The utility model relates to a 3D printing apparatus's technical field, in particular to 3D printer sand material circulating device.

Background

When the sand mould 3D printer is operated, part sand material can be stirred to the recovery hopper from the print table face at the smooth in-process, and these sand materials can recycle. The existing recovery method is to manually carry sand materials in a recovery hopper from the outside and then put the sand materials into a new sand box of a sand mold 3D printer to be used as new sand, and the 3D printing equipment in the mode has low working efficiency and high labor intensity and cannot meet the requirements of rapid and efficient production. Thus, the prior art still has disadvantages.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the utility model provides a 3D printer sand material circulating device, it can be recycled the sand material in the recovery hopper and reuse in 3D prints.

The utility model provides a solution of its technical problem is:

A3D printer sand material circulating device comprises a recovery hopper, a new sand box, a mixing hopper and a negative pressure absorption device; the top of the mixing hopper is open, a new sand outlet is arranged on the new sand box, and the new sand outlet is arranged above the mixing hopper; the negative pressure absorption device comprises a collection box, the collection box is provided with a collection cavity, the collection cavity is provided with an upper cavity part and a lower cavity part positioned on the lower side of the upper cavity part, the upper cavity part is provided with a sand inlet and an air outlet, the lower cavity part is provided with a used sand outlet, the outer side of the air outlet is connected with a negative pressure generator, the air outlet is provided with a first filter, a first valve is arranged between the upper cavity part and the lower cavity part, and the used sand outlet is arranged above a mixing hopper; the bottom of the recovery hopper is provided with a sand outlet which is communicated with the sand inlet through a connecting pipeline.

As a further improvement of the above technical solution, the negative pressure generator is a vacuum pump.

As a further improvement of the above technical scheme, a diversion trench is arranged between the used sand outlet and the mixing hopper, the diversion trench is arranged in a downward inclination manner, the used sand outlet is arranged in the upper part of the diversion trench, and the lower end of the diversion trench is arranged in the mixing hopper or right above the mixing hopper.

As a further improvement of the technical scheme, a second filter is arranged on the used sand outlet.

As a further improvement of the above technical solution, the first filter is a first mesh filter, and the second filter is a second mesh filter.

As a further improvement of the above technical scheme, an electric control valve or a conveying device for driving sand to flow outwards is arranged on the fresh sand outlet, a sand level detecting device is arranged in the mixing hopper or above the mixing hopper, and the electric control valve or the conveying device is electrically connected with the sand level detecting device.

As a further improvement of the above technical scheme, the sand position detecting device is a photoelectric sensor, the inductive head of the photoelectric sensor faces downward, the photoelectric sensor is provided with a sand blocking sleeve, the sand blocking sleeve is sleeved outside the photoelectric sensor, the upper end of the sand blocking sleeve is closed, the lower end of the sand blocking sleeve is open, and the lower end of the sand blocking sleeve is arranged below the inductive head of the photoelectric sensor.

As a further improvement of the technical scheme, the sand blocking sleeve structure further comprises an air blowing pipe, wherein the outlet end of the air blowing pipe is arranged in the sand blocking sleeve, and the inlet end of the air blowing pipe is arranged outside the sand blocking sleeve.

The utility model has the advantages that: when the sand circulation device of the 3D printer is used, the first valve is closed, the negative pressure generator is started, used sand in the recovery hopper is sucked to the upper cavity under the action of negative pressure, then the negative pressure generator is closed, the first valve is opened, the used sand falls into the lower cavity and flows into the mixing hopper from the used sand outlet, and the used sand is mixed with new sand in the mixing hopper and then is supplied to the 3D printer for printing; part of sand material returns to the recycling hopper in the printing process, and the circulation is realized; the power of carrying the used sand comes from the negative pressure generator like this, need not artifical transport, and the action of carrying the used sand can be carried out continuously, and work efficiency is high, intensity of labour is little, can satisfy the demand of quick, high efficiency production.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

FIG. 1 is a front view of the structure of the embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a collecting box according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the sand level detecting device according to the embodiment of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The utility model provides an each technical feature can the interactive combination under the prerequisite of conflict each other.

With reference to fig. 1 to 3, this is an embodiment of the invention, in particular:

A3D printer sand material circulating device comprises a recovery hopper 17, a new sand box 11, a mixing hopper 15 and a negative pressure absorption device; the top of the mixing hopper 15 is open, a new sand outlet is arranged on the new sand box 11, and the new sand outlet is arranged above the mixing hopper 15; the negative pressure absorption device comprises a collection box 02, the collection box 02 is provided with a collection cavity, the collection cavity is provided with an upper cavity part 07 and a lower cavity part 06 positioned on the lower side of the upper cavity part 07, the upper cavity part 07 is provided with a sand inlet 08 and an air outlet 09, the lower cavity part 06 is provided with a used sand outlet, the outer side of the air outlet 09 is connected with a negative pressure generator 01, the air outlet 09 is provided with a first filter 10, a first valve 03 is arranged between the upper cavity part 07 and the lower cavity part 06, and the used sand outlet is arranged above a mixing hopper 15; the bottom of the recovery hopper 17 is provided with a sand outlet which is communicated with the sand inlet 08 through a connecting pipeline 18. In the embodiment, the used sand outlet is arranged at the bottom of the lower cavity part 06, the air outlet 09 is arranged at the top of the upper cavity part 07, the first valve 03 is driven to open and close by the motor, when the device is used, the first valve 03 is closed first, the negative pressure generator 01 is started, the upper cavity part 07 becomes a negative pressure space, so that the used sand in the recovery hopper 17 is absorbed to the upper cavity part 07 under the action of negative pressure, and the first filter 10 can prevent sand from entering the negative pressure generator 01 to damage the negative pressure generator 01; then, the negative pressure generator 01 is closed, the first valve 03 is opened, the used sand falls into the lower cavity part 06, or part of the used sand falls into the lower cavity part 06 under the action of gravity without closing the negative pressure generator 01, and the used sand flows into the mixing hopper 15 from the used sand outlet, is mixed with new sand in the mixing hopper 15 and then is supplied to the 3D printer 16 for printing; part of sand materials return to the recycling hopper 17 in the printing process, and the circulation is performed; the power of carrying the used sand comes from negative pressure generator 01 like this, need not artifical transport, and the action of carrying the used sand can be carried out continuously, and work efficiency is high, intensity of labour is little, can satisfy the demand of quick, high efficiency production.

In a further preferred embodiment, the negative pressure generator 01 is a vacuum pump. Because the sand material has certain quality, select for use the strong vacuum pump of air exhaust ability to make the circulating device operating efficiency of this embodiment high.

Further, as a preferred embodiment, a diversion trench 04 is provided between the used sand outlet and the mixing hopper 15, the diversion trench 04 is provided in a downward inclination, the used sand outlet is provided in an upper portion of the diversion trench 04, and a lower end of the diversion trench 04 is provided in the mixing hopper 15 or directly above the mixing hopper 15. The sand material that flows out from the used sand outlet flows downwards to the mixing hopper 15 under the guide of the diversion trench 04, so that the collecting box 02 can be arranged above the side of the mixing hopper 15 without being arranged right above the mixing hopper 15, and the position of the collecting box 02 can be flexibly designed according to the requirement.

Further preferably, a second filter 05 is disposed on the used sand outlet. Since the mixing hopper 15 is open on the printing table, sundries can easily fall off, and meanwhile, the sand used for 3D printing is mixed with the curing agent and is easily agglomerated, and the large substances can seriously affect the operation of the 3D printer 16, so that the sand cannot be fed into the 3D printer 16; by providing the second filter 05, these large substances can be filtered.

In a further preferred embodiment, the first filter 10 is a first mesh filter, and the second filter 05 is a second mesh filter. The first filter 10 is used for filtering sand grains, the second filter 05 is used for filtering large solid substances, and the purpose can be achieved by using a screen filter which is simple in structure and low in cost; the second screen filter in this embodiment has the screen cloth that the slope set up and send out the discharge gate of big particulate matter, the incline direction of screen cloth is opposite with the incline direction of guiding gutter 04, and the discharge gate is located the bottom of screen cloth, is convenient for clear up the large granule thing of filtering out.

Further as a preferred embodiment, an electric control valve 12 or a conveying device for driving sand to flow outwards is arranged on the fresh sand outlet, a sand level detecting device is arranged in the mixing hopper 15 or above the mixing hopper 15, and the electric control valve 12 or the conveying device is electrically connected with the sand level detecting device. The sand level detection device detects the height of the sand level in the mixing hopper 15, when the height of the sand level reaches a set position, the electric control valve 12 or the conveying device is closed, new sand does not flow out any more, and sand in the mixing hopper 15 is prevented from overflowing.

Further as a preferred embodiment, the sand level detecting device is a photoelectric sensor 19, a sensing head of the photoelectric sensor 19 faces downward, a sand blocking sleeve 13 is arranged on the photoelectric sensor 19, the sand blocking sleeve 13 is sleeved outside the photoelectric sensor 19, the upper end of the sand blocking sleeve 13 is closed, the lower end of the sand blocking sleeve 13 is open, and the lower end of the sand blocking sleeve 13 is arranged below the sensing head of the photoelectric sensor 19. The sand blocking sleeve 13 can block the sand particles splashed in the mixing hopper 15, and the sand particles are prevented from being attached to a sensing head of the photoelectric sensor 19 to cause inaccurate sensing; the photosensor 19 in this embodiment is a diffuse reflection type photosensor 19.

Further as a preferred embodiment, the sand-blocking device further comprises an air blowing pipe 14, wherein an outlet end of the air blowing pipe 14 is arranged in the sand-blocking sleeve 13, and an inlet end of the air blowing pipe 14 is arranged outside the sand-blocking sleeve 13. When the sand-blocking sleeve 13 is used, the air blowing pipe 14 is connected with an air compressor, and compressed air is introduced from the inlet end of the air blowing pipe 14, so that air can be continuously blown outwards in the sand-blocking sleeve 13, and sand is more effectively prevented from being sputtered onto the induction head of the photoelectric sensor 19.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims

1. The utility model provides a 3D printer sand material circulating device which characterized in that: comprises a recovery hopper, a new sand box, a mixing hopper and a negative pressure absorption device; the top of the mixing hopper is open, a new sand outlet is arranged on the new sand box, and the new sand outlet is arranged above the mixing hopper; the negative pressure absorption device comprises a collection box, the collection box is provided with a collection cavity, the collection cavity is provided with an upper cavity part and a lower cavity part positioned on the lower side of the upper cavity part, the upper cavity part is provided with a sand inlet and an air outlet, the lower cavity part is provided with a used sand outlet, the outer side of the air outlet is connected with a negative pressure generator, the air outlet is provided with a first filter, a first valve is arranged between the upper cavity part and the lower cavity part, and the used sand outlet is arranged above a mixing hopper; the bottom of the recovery hopper is provided with a sand outlet which is communicated with the sand inlet through a connecting pipeline.

2. The 3D printer sand circulation device of claim 1, wherein: the negative pressure generator is a vacuum pump.

3. The 3D printer sand circulation device of claim 1, wherein: a diversion trench is arranged between the used sand outlet and the mixing hopper, the diversion trench is arranged in a downward inclined mode, the used sand outlet is arranged in the upper portion of the diversion trench, and the lower end of the diversion trench is arranged in the mixing hopper or is arranged right above the mixing hopper.

4. The 3D printer sand circulation device of claim 1, wherein: and a second filter is arranged on the used sand outlet.

5. The 3D printer sand circulation device of claim 4, wherein: the first filter is a first mesh filter and the second filter is a second mesh filter.

6. The 3D printer sand circulation device of claim 1, wherein: and an electric control valve or a conveying device for driving sand materials to flow outwards is arranged on the fresh sand outlet, a sand level detection device is arranged in the mixing hopper or above the mixing hopper, and the electric control valve or the conveying device is electrically connected with the sand level detection device.

7. The 3D printer sand circulation device of claim 6, wherein: the sand position detection device is a photoelectric sensor, an induction head of the photoelectric sensor faces downwards, a sand blocking sleeve is arranged on the photoelectric sensor and sleeved outside the photoelectric sensor, the upper end of the sand blocking sleeve is sealed, the lower end of the sand blocking sleeve is opened, and the lower end of the sand blocking sleeve is arranged below the induction head of the photoelectric sensor.

8. The 3D printer sand circulation device of claim 7, wherein: the sand blocking sleeve is characterized by further comprising an air blowing pipe, the outlet end of the air blowing pipe is arranged in the sand blocking sleeve, and the inlet end of the air blowing pipe is arranged outside the sand blocking sleeve.