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22522results about "Foundry cores" patented technology

Cast form water borne coating and technique for preparing the same

The invention relates to an auxiliary material for casting a mould, in particular to a casting mould water-based coating formulation for a sand mould or an expendable pattern casting (EPC), and a process for preparing the same. The casting mould water-based coating formulation consists of refractory powder, a suspending agent, a bonding agent, a surfactant, a defoaming agent, a corrosion remover and water. The process comprises the following steps: adding the suspending agent to the water directly, and mixing and dispersing the mixture in a high speed dispersion machine; adding auxiliary agents including the defoaming agent, the surfactant, the corrosion remover, and the like to the water, and mixing the auxiliary agents; adding the refractory powder to the mixture to be mixed; and adding the bonding agent to the mixture to be mixed, and then adding water to adjust the coating until the coating has the thickness in a using state to obtain the finished product. The coating prepared by the process has the effects that the coating ensures that a high-density low-viscosity coating has excellent suspension property and storage stability, a coating layer is not easy to crack after drying, the coating is advantageous to improve the capacity of the coating to resist high temperature metal corrosion, and the like.
Owner:深圳市景鼎现代科技有限公司

High effectiveness cooled turbine vane or blade

A robust multiple-walled, multi-pass, high cooling effectiveness cooled turbine vane or blade designed for ease of manufacturability, minimizes cooling flows on highly loaded turbine rotors. The vane or blade design allows the turbine inlet temperature to increase over current technology levels while simultaneously reducing turbine cooling to low levels. A multi-wall cooling system is described, which meets the inherent conflict to maximize the flow area of the cooling passages while retaining the required section thickness to meet the structural requirements. Independent cooling circuits for the vane or blade's pressure and suction surfaces allow the cooling of the airfoil surfaces to be tailored to specific heat load distributions (that is, the pressure surface circuit is an independent forward flowing serpentine while the suction surface is an independent rearward flowing serpentine). The cooling air for the independent circuits is supplied through separate passages at the base of the vane or blade. The cooling air follows intricate passages to feed the serpentine thin outer wall passages, which incorporate pin fins, turbulators, etc. These passages, while satisfying the aero/thermal/stress requirements, are of a manufacturing configuration that may be cast with single crystal materials using conventional casting techniques.
Owner:HONEYWELL INT INC
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