Multi-material composite sand mold forming method and device

A multi-material, sand-type technology, applied in the field of additive manufacturing, can solve the problems of material limitation and singleness, and achieve the effect of high-precision preparation

Pending Publication Date: 2022-04-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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Problems solved by technology

The sand mold formed based on 3D printing (3DP) technology has the following disadvantages: (1) T

Method used

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  • Multi-material composite sand mold forming method and device
  • Multi-material composite sand mold forming method and device

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[0032] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.

[0033] figure 1 As shown, the device includes a raw sand particle storage box 1, a curing agent storage box 2; a vacuum sanding system 3, a multi-material composite sand casting system 5, a printing system 8, an infrared heating system 9, and a lifting platform device 7; the raw sand The discharge pipes of the particle storage box 1 and the curing agent storage box 2 are conne...

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Abstract

The invention belongs to the field of additive manufacturing, and discloses a multi-material composite sand mold forming method and device. The device comprises a molding sand pretreatment system, a vacuum sand feeding system, a multi-material sand paving system, a printing system, an infrared heating system and a lifting platform device. According to the method, additive manufacturing is carried out through the 3D printing (3DP) technology, preparation of the multi-material composite sand mold is achieved by combining the advantages of high flexible manufacturing capacity, high forming quality and high efficiency of the 3D printing (3DP) technology, and the method has great innovation, application, popularization and use values.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a multi-material composite sand mold forming method and device. Background technique [0002] The additive manufacturing technology based on sand mold 3D printing has the characteristics of strong flexible manufacturing capability, high dimensional accuracy, energy saving and material reduction. However, the molding material is limited and single. A single molding material cannot have excellent casting properties such as strength, air permeability, and gas generation. At the same time, the local thermal conductivity, interface heat transfer coefficient, and thermal expansion of the mold are relatively low, resulting in complex castings with poor microstructure, mechanical properties, and dimensional accuracy. Low, it is difficult to meet the high-performance casting requirements of high-end complex castings. It is urgent to innovate, develop new equipment, expl...

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Application Information

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IPC IPC(8): B22C9/02B33Y10/00B33Y30/00B33Y40/10B33Y50/02B33Y70/10B22C1/00B22C5/04
CPCY02P10/25
Inventor 单忠德闫丹丹杨浩秦施建培孙玉成倪允强王佳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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