Pressure Slip Casting Device and Method for Casting a Molded Part

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This invention relates to a pressure slip casting apparatus and a specialized casting method for producing molded parts, particularly fire-resistant components. The technique involves using a bimodal slip—a mixture of fine and coarse granular fireproof materials—delivered under controlled pressure to a mold. The system is designed to minimize shear forces during transfer, preventing the separation of material components and ensuring uniform, high-quality refractory parts after sintering.

Use CasesContent extracted from patent full text and abstract with AI.

• Production of fire-resistant linings and bricks for metallurgical vessels (e.g., furnaces, converters)
• Manufacture of durable components like spouts, slide gates, stoppers, channels, and rings used in steel casting and continuous casting operations
• Fabrication of temperature-resistant tubes and transport vessels for the chemical, cement, and waste incineration industries
• Creation of customized, complex-shaped refractory components for high-temperature and corrosive environments
• Automated and efficient industrial production of large or intricately-shaped ceramic and refractory products

BenefitsContent extracted from patent full text and abstract with AI.

• Enables rapid, cost-effective, and defect-minimized casting of complex or large refractory shapes
• Prevents material separation and ensures uniform distribution of both fine and coarse particles in the final product, enhancing structural integrity
• Reduces risk of cracks or stress build-up in cast parts, resulting in higher reliability and longer service life
• Allows for more flexible and automated manufacturing processes, increasing throughput and consistency
• Compatible with a wide variety of refractory materials, including both oxide and non-oxide ceramics, and carbon-containing mixtures
• Improved control over rheology and consolidation (using binders and additives), permitting tailored properties for specific industrial needs

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Patent Abstract

The invention relates to a pressure slip casting apparatus and a method for casting a molded article. Said apparatus is designed and said method is devised to produce a slip-cast molded article that is bimodally composed of granular and fire-resistant material comprising fine fractions (K1) having first grain sizes (k1) ranging from 0.01 µm to 100 µm and coarse fractions (K2) having second grain sizes (k2) ranging from 100 µm to 10 mm. A fire-resistant molded article can thus be prepared in a simple manner after sintering the molded article. In the apparatus according to the invention, a slip (S) prepared in a pressure vessel (5) is discharged from the pressure vessel (5) into the casting chamber (8) through the discharge pipe (7) by means of a pressurized medium (G). Preferably, the size of the discharge pipe (7) is such and the pressure is selected at such a high level that the slip (S) is discharged through the discharge pipe in such a way that no more than negligible shearing forces act on the slip (S).