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Returned sand treatment device and method for sand mould 3D printing

A 3D printing and processing device technology, applied in the field of 3D printing, can solve the problems of exacerbating printing operation costs, environmental pollution, waste of resources, etc., and achieve the effects of saving materials, reducing costs, and avoiding pollution

Pending Publication Date: 2017-08-08
康硕电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These raw sands for printing have high quality requirements and are all imported from abroad. The cost is 10 times that of ordinary domestic foundry sands. If the old sands are discarded, it will not only increase the cost of printing operations, but also waste resources and harm the environment. cause certain pollution

Method used

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  • Returned sand treatment device and method for sand mould 3D printing
  • Returned sand treatment device and method for sand mould 3D printing
  • Returned sand treatment device and method for sand mould 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Please refer to figure 2 , this embodiment provides a device for processing old sand for sand mold 3D printing.

[0031] The device includes a feeding device, a roasting furnace 6, a conveying device and a collecting device.

[0032] The feeding device is an old sand hopper 1 for containing used sand, and a valve 2 is provided at the lower end of the old sand hopper 1 for controlling the feeding of the old sand in the old sand hopper 1 .

[0033] A sand level meter 3 is arranged at the lower end of the valve 2, and when the sand level meter 3 detects that there is no sand in the old sand bucket 1, the operation of the whole device will be stopped.

[0034] The lower end of the sand level meter 3 is provided with a lower sand pipe 4, so that the feeding device is connected with the roasting furnace 6. The middle part of the lower sand pipe 4 is provided with a horizontally arranged bypass pipeline, which is an exhaust pipe 5, which is used to discharge the gas generat...

Embodiment 2

[0041] Please refer to figure 1 , this embodiment provides a method for processing old sand from sand mold 3D printing, using the device in Embodiment 1 for processing.

[0042] Concentrate the recovered old sand in the old sand bucket. When a certain amount of sand is reached, open the valve at the lower end to fill the roasting furnace by the flow of sand by its own weight. The sand dunes formed by the self-accumulation of sand will leave space in the roasting furnace, which is convenient for the subsequent roasting process. in the exhaust.

[0043] Turn on the power, heat the old sand in the roasting furnace through the heating tube, and at the same time, the temperature measuring couple in the roasting furnace will detect the temperature of the old sand. When the preset roasting temperature of 350°C is reached, the heat preservation timer will start.

[0044] Heat preservation for 80 minutes. After the heat preservation time is up, the signal starts the motor of the screw...

Embodiment 3

[0048] Please refer to figure 1 , this embodiment provides a method for processing old sand from sand mold 3D printing, using the device in Embodiment 1 for processing.

[0049] The method adopted in this example is basically the same as that in Example 2, the difference is that the preset calcination temperature in this example is 450° C., and the holding time is 60 minutes.

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Abstract

The invention discloses a returned sand treatment device for sand mould 3D printing. The returned sand treatment device comprises a supplying device, a roasting furnace, a conveying device and a collecting device; the supplying device is arranged over the roasting furnace and connected with the roasting furnace, and the conveying device is arranged at the bottom of the roasting furnace and can convey materials in the roasting furnace to the collecting device. The invention further discloses a returned sand treatment method for sand mould 3D printing. The returned sand treatment method comprises the steps that returned sand is added into the roasting furnace and then heated and roasted, and after the returned sand is heated to reach the preset temperature, the temperature is kept constant for a period of time, and the roasted returned sand is transferred out of the roasting furnace and screened. Accordingly, the returned sand can be quickly treated in batches through the device; the properties of the returned sand treated by adopting the method are close to those of new sand, the treated returned sand can be used by completely replacing the new sand, the cost is reduced, and material consumption and pollution caused by returned sand waste are reduced.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a device and method for treating used sand from sand mold 3D printing. Background technique [0002] The working principle of sand mold 3D printing is to first mix the casting quartz sand with the curing agent. After laying a layer of sand on the printing platform, the printing head sprays the resin adhesive on the sand layer according to the contour characteristics of the sand core in this layer. Resin layers are piled up and bonded repeatedly, and finally the required sand core entity is formed. After self-hardening at room temperature, it is taken out of the working box, and the floating sand on the surface can be used for casting production. [0003] Due to the influence of the contour shape and quantity of the printed sand cores, it is impossible to fully utilize the sand in the printing work box to print sand cores. This part of the sand that has not been sprayed with resin is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C5/00B33Y40/00
CPCB22C5/00B33Y40/00
Inventor 张西鹏蒋旻刘斌樊一杨李明
Owner 康硕电气集团有限公司
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