Method for the layerwise construction of models

A technology for building models and models, applied in the field of material systems, which can solve the problems of sand being difficult to regenerate, difficult to decompose, and high hardness.

Active Publication Date: 2014-04-02
VOXELJET AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] It has already presented the disadvantage that the cement usually develops a higher hardness during tempering, which it retains even after subsequent cooling
[0033] Disadvantages of these methods using water glass binders are in particular that they do not readily disintegrate after casting and the remaining sand is difficult to regenerate compared to organically bound sand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0092] For example, the following describes a material system used in a three-dimensional printing process.

[0093] Mix the following materials thoroughly so that the mixture is completely homogeneous: 90% by weight of GS14RP type quartz sand (purchased from Strobel) with an average particle diameter of 0.13mm and 6% by weight of water glass powder (such as Molar from Cogins) module 2.10, Portil A), 2% by weight synthetic silica (Microsilica 971U from Eikern Company) as latent curing agent and 2% by weight high alumina cement (CA 14S from Almatis Company) as hydraulic binder.

[0094] This dry mold material mixture is applied layer by layer into the build area. Next, the water glass binder is activated by selectively printing water using a print head typically used in 3D printing processes and using a well-known inkjet printing technique. In the printed area, the binder dissolves and the surrounding particles glue together.

[0095] In order to manufacture the desired mode...

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Abstract

A method is described here for the layerwise construction of models, wherein, in a building region, a particulate material is applied layerwise and selectively cured. These steps are repeated until a desired model is obtained. The material comprises in this case a particulate building material and a spray-dried alkali metal silicate solution. Selective activation of the curing proceeds using a water-comprising solution.

Description

technical field [0001] According to the preambles of claims 1 and 2, the invention relates to a method for building a multilayer model and a material system for layer-by-layer construction of the model. Background technique [0002] Regenerative methods for producing 3D structures have been known for a long time (eg from EP 0 431 924 B1 or WO 200168375 A2). [0003] In addition, it includes methods of stereolithography (solidification of monolithic liquids with high-energy beams), selective laser sintering (melting of granular materials with high-energy beams), and 3D printing methods. All of the methods described above allow relatively economical manufacture of molds for building prototypes. When the printing device is equipped with multiple controllable nozzles, the 3D printing method can build faster than all other methods. Thus, its application is not limited to the field of prototyping. Even series-produced components can be produced economically. [0004] In genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26B28B1/00
CPCC04B28/26C04B2111/00181B28B7/465C04B2111/00215B28B1/001B22C9/10B22C23/00B22C1/188C04B2111/00905Y02P10/25Y02W30/91C04B7/32C04B14/06C04B18/146C04B7/02C04B14/066C04B28/24B28B1/00B22C1/18
Inventor 英戈·格努奇特尔丹尼尔·巩特尔英戈·埃德雷尔克里斯蒂安·勒斯蒂格埃德加·马勒
Owner VOXELJET AG
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