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Casting method adopting dual thin shell mold process

A thin shell and process technology, applied in casting molding equipment, molds, mold components, etc., can solve problems such as high cost, high energy consumption, and complexity, and achieve the effects of reducing pollution, improving production efficiency, and increasing connection strength.

Active Publication Date: 2018-10-23
LIANYUNGANG YYU PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no mention of the method of using a 3D printer to make a thin shell mold, and then using the dipping process to produce a high-temperature-resistant casting cavity.
[0004] Specifically: on the one hand, the shell mold made by the traditional lost-wax casting process has the disadvantages of cumbersome and complicated manufacturing process and high cost; and because the shell mold is thicker, it consumes high energy and pollutes the subsequent shell shaking and sand cleaning Big
On the other hand, using a 3D printer to print a high-temperature-resistant thin shell mold, it is difficult to overcome problems such as deformation and cracking during the sintering process

Method used

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  • Casting method adopting dual thin shell mold process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Its specific operation method:

[0053] 1. Make a 3D model of the thin shell mold 1 with a thickness of 1mm, and the amount of compensation for the inner wall.

[0054] 2. Using an LCD light-curing printer and light-curing resin materials, print out the thin shell mold 1 .

[0055] 3. Carry out the following surface smoothing treatment: first remove the outer support of the thin shell mold 1, perform ultrasonic cleaning, and then perform UV irradiation. In principle, the irradiation time is the same as the printing time.

[0056] 4. After the following 3 layers of dipping treatment, the shell mold 3 is produced.

[0057] The first layer: zircon paste + zircon sand

[0058] The second layer: zircon paste + zircon sand

[0059] The third layer: mullite pulp + mullite fine sand

[0060] Sealing pulp: mulai pulp

[0061] 5. Put the double-shell mold into the sand box for sand filling and reinforcement process, and add the lid of the sand box so that the gate is expose...

Embodiment 2

[0066] Its specific operation method:

[0067] 1) Make a 3D model of the thin shell mold 1 with a thickness of 1.5mm, and the amount of inner wall compensation.

[0068] 2) Use the FDM printer + plastic to print out the thin shell mold 1.

[0069] 3) Perform the following surface smoothing treatment: remove the external support of the thin shell mold 1 .

[0070] 4) After the following two layers of dipping treatment, the shell mold 3 is produced.

[0071] The first layer: zircon paste + zircon sand

[0072] The second layer: mullite pulp + mullite fine sand

[0073] Sealing pulp: mulai pulp

[0074] 5) Put it into the sand box for sand filling reinforcement process.

[0075] 6) Put the double-layer shell mold into a sintering furnace with a ventilation system, with the gate facing up, at a heating rate of 400° per hour, heat up to 1000° for 1 hour, so that the thin shell mold 1 is completely gasified .

[0076] 7) Casting the shell mold 3 in the sand box.

[0077] 8) ...

Embodiment 3

[0079] Its specific operation method:

[0080] a. Make a 3D model of the thin shell mold 1 with a thickness of 1mm, and the amount of inner wall compensation.

[0081] b. Print out the thin shell mold 1 by using a DLP light-curing printer and light-curing ceramic resin material.

[0082] c. Carry out the following surface smoothing treatment: ultrasonic cleaning first, and then UV irradiation. In principle, the irradiation time is the same as the printing time.

[0083] d. After the following 2-layer dipping treatment, the shell mold 3 is produced to form a double-layer shell mold.

[0084] The first layer: zircon paste + zircon sand

[0085] The second layer: zircon paste + zircon sand

[0086] Sealing pulp: mulai pulp

[0087] e. Put the double-layer shell mold into the sand box, and carry out the sand filling and strengthening process.

[0088] f. Put the sand box with double-shell mold into a sintering furnace with a ventilation system, with the gate facing upwards, ...

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Abstract

The invention relates to the field of the 3D printing technology and the casting process, in particular to a casting method adopting a dual thin shell mold process. The casting method comprises the step of manufacturing a thin shell mold 3D printer and a corresponding computer. Specifically, a thin shell mold is printed out through the 3D printing technology, the wall thickness of the thin shell mold does not exceed 2 mm, a high temperature resisting outer shell mold is manufactured out through the immersing sizing process in the precision casting process, after filling reinforcement, the thinshell mold is removed through a physical or chemical method, casting and aftertreatment are carried out, and a finished product is manufactured. The casting method has the advantages that productioncan be standardized by manufacturing the thin shell mold through the 3D printer, the 3D printing technology and the dewaxing casting process are combined, and a manufacturing process which is easier to operate and more environment-friendly and energy-saving and reduces the production cost is obtained.

Description

technical field [0001] The invention relates to the fields of 3D printing technology and casting technology, in particular to a casting method using a double thin shell mold technology. Background technique [0002] Lost wax casting is a kind of precision casting. In traditional lost wax casting, there are usually many steps. In this regard, the publication number is "CN105834360 B", "A casting method for making shell molds by 3D printing", which clearly records the method of manufacturing shell molds in the traditional lost-wax casting process. Generally, paraffin wax and other materials are used to make wax models, and then the wax models are soaked in multiple layers or sprayed to make the outer surface of the wax models have a layer of shell mold. After waiting for this shell mold to harden subsequently, utilize temperature to make solid wax become liquid and flow out, the high temperature resistant shell mold that can be used for casting has just been completed. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/02B22C9/04B33Y10/00
CPCB22C7/02B22C9/043B33Y10/00
Inventor 吴政宽吴振行
Owner LIANYUNGANG YYU PROD
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