Precision sintering process for injecting low-viscosity masses containing glass or metal powder into modular permanent injection dies made of mineral slip

Abstract

Precision sintering method for injecting low-viscosity masses containing glass or metal powder into modular permanent injection dies made of mineral slip. The invention describes a mass for injecting glass powder into injection dies at room temperature in an injection channel (X3), to obtain glass castings (X4) in a sintering process. It remains in the injection dies throughout the sintering process. The invention describes a mass for injecting glass powder into injection dies at room temperature to obtain high-precision finished glass parts in series.

Description

Title of the invention: Precision sintering method for injecting low-viscosity masses containing glass or metal powder into modular permanent injection dies made of mineral slip

[0001] In the following, we describe a primary and injection molding technique for mass-producing, from a mineral slip, high-precision multi-part injection dies, into which masses containing glass or metal powder are also injected at room temperature, in order to generate, in synchronization with the manufacturing, high-precision finished parts made of glass or metal in a sintering process. The schematic manufacturing process is illustrated isometrically in figures [Fig.l], [Fig.2] and [Fig.3].

[0002] PRIMARY MOLDING TOOLS [Fig.l] consist of individual tool components designed using CAD software and manufactured by rapid prototyping (3D printing process, stereolithography). In the following formulations, PRIMARY MOLDING TOOLS are called MODULAR-RAPID PROTOTYPE PRIMARY MOLDING TOOLS, abbreviated OMP-MRP [Fig.l], The [Fig.l] represent the injection channel with (XI) and the air channels (X2).

[0003] The OMP-MRPs serve as hollow molds for the injection of the individual components, i.e. the different modules of a MODULAR INJECTION DIE (MGI) [Fig.2]. The different modules of a MGI therefore correspond to the geometrically well-defined inner contours of each hollow mold of the OMP-MRPs, which consists of the respective tooling component group of the OMP-MRP for the injection of the equivalent module of the MGI.

[0004] The MGI consists of a low viscosity MINERAL SLICE (MS), suitable for injection at room temperature. The MS reaches a solid state after a drying phase at room temperature, resistant to high temperatures, after demolding the OMP-MRP and a drying process at 50°- 100° for a few hours. The injection channel is shown in figure [Fig.2] under (X3).

[0005] The material composition of the BM (Injection component to have the MGI) is presented under [CHEM I].

[0006] The material composition of LOW VISCOSITY MASS for INJECTION (MVB-I) in MGI is presented under [CHEM II].

[0007] The MVB-I injected into the MGI remains there during the entire sintering process (SP), is baked during this time up to the required melting point (of the MVB-I) and after the cooling phase in the baking furnace, respectively in the MGI, up to the room temperature. After demolding the MGI, we obtain the Cast Iron Part (FGT), which is shown in [Fig.3] under (X4).

[0008] CHEM I

[0009] / tapotât.» depaffiteaf ds / a éÉrastsfemes Sowfts / fs®

Claims

Claims

1. Component containing high temperature resistant minerals for the manufacture of molding devices, characterized in that it is defined with a ready-to-use mineral composition (cf. Cookson-CLAL, Plaster Pro Ht Platinium, product code 998 1166, 2019) according to the following table:

2. Use of the component according to claim 1 for manufacturing a sintering matrix in order to obtain finished parts (X4) by sintering with the mass containing glass powder (cf. FR2200790).

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