Molding method and device for 3D printing ice-mold casting sand mold

A 3D printing and sand molding technology, which is applied to casting molding equipment, casting mold components, casting molds, etc., can solve the problems of high incidence of casting defects, easy pollution of the environment, and difficulty in sand removal, and achieve low cost and wide source of materials Effect

Active Publication Date: 2015-10-21
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the sand mold resin content is high, it is difficult to remove the sand after the

Method used

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  • Molding method and device for 3D printing ice-mold casting sand mold
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  • Molding method and device for 3D printing ice-mold casting sand mold

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Embodiment Construction

[0034] The 3D printing technology proposed in the present invention produces a method for freezing molds, such as Figure 1 to Figure 11 As shown, the refractory sand powder used to make the mold is cooled and processed to -40℃ to -10℃ for standby. The equipment uses a computer-controlled sand paving system. First, a layer of sand is laid on the workbench, and then the computer is based on the mold In the shape data information of the section, drive the array nozzle device to spray water or aqueous solution at the forming section. The sprayed water or aqueous solution freezes into ice when encountering low-temperature molding sand and freezes the layer of sand together; after the first layer is formed, work The platform is lowered by one layer, and then the second layer of sand paving, water spraying or aqueous solution is carried out. The sprayed sand layer freezes the water or aqueous solution into ice, and freezes the sand and this layer together with the previous layer. Rep...

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Abstract

The invention belongs to the technical field of casting, and discloses a rapid mold-free casting manufacturing method. The method comprises the steps that the temperature of molding sand is decreased to range from minus 40 DEG C to minus 10 DEG C, a computer controls a working platform to move downwards by a certain distance and lays a layer of frozen bottom sand at the low-temperature environment, then, the working platform moves downwards by one layer thickness, a layer of low-temperature molding sand is laid, the computer controls sprayers to spray water or a water solution according to the cross-section shape of the current layer cast mold, and the sand mold is solidified; and printing is performed layer by layer, and a casting mold is obtained. The invention further provides a 3D printing ice-mold casting sand mold device. The device comprises a low-temperature molding chamber, the liftable working platform, a powder spreading device and a two-dimensional motion system. Array nozzles connected with a liquid supply system are installed on the two-dimensional motion system and spray water or the water solution. A feeding system is used for providing low-temperature molding sand. The casting mold manufactured by adopting the method has the beneficial effects of being environment friendly, high in manufacturing speed, low in cost, low in gas generating amount, free of deformation and the like and has the popularization and usage value.

Description

Technical field [0001] The invention belongs to the technical field of casting, and specifically relates to a method for rapid forming of a moldless casting mold and a device for forming a moldless casting mold. Background technique [0002] Most of the current rapid prototype technology (rapid prototype) is based on layered manufacturing technology. The layered manufacturing technology decomposes the processed object into multiple parallel thin layers. During the processing, these thin layers are formed layer by layer and superimposed. manufacture. This process is often realized with the help of computer technology. [0003] There are two main methods commonly used to quickly make foundry sand molds (including sand molds and cores, collectively referred to as casting molds hereinafter) using layered manufacturing technology: [0004] One is to use laser to selectively sinter the coated sand. The basic method is: first lay a layer of coated sand on the worktable and heat it to a t...

Claims

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Application Information

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IPC IPC(8): B22C9/02B33Y10/00
Inventor 李锋军单忠德刘丰
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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