Cooling Rate Studies in Aluminum Counter Gravity Lost Foam Casting

2002 ◽  
Author(s):  
Sayavur I. Bakhtiyarov ◽  
Ruel A. Overfelt ◽  
Johnathon Capps
Keyword(s):  
Experimental Study ◽  
Liquid Metal ◽  
Cooling Rate ◽  
Lost Foam Casting ◽  
Cooling Rates ◽  
Lost Foam ◽  
Front Dynamics

In this paper we present the results of the experimental study of the liquid metal front dynamics during the gravity pouring and the vacuum assisted counter-gravity lost foam casting techniques. The cooling rates of the castings produced by both techniques are compared.

EXPERIMENTAL STUDY OF LOST FOAM CASTING

2018 ◽  
Vol 13 (4) ◽  
pp. 46
Author(s):  
PRASAD T. SIVA ◽  
M. DEVAIAH ◽  
◽  
Keyword(s):  
Experimental Study ◽  
Lost Foam Casting ◽  
Lost Foam

Experimental study on the filling process of the lost foam casting process of a cast iron plate

2013 ◽  
Vol 47 (1/2/3/4) ◽  
pp. 188 ◽  
Author(s):  
Jinwu Kang ◽  
Xiaokun Hao ◽  
Gang Nie ◽  
Haimin Long ◽  
Tianjiao Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Cast Iron ◽  
Casting Process ◽  
Lost Foam Casting ◽  
Filling Process ◽  
Iron Plate ◽  
Lost Foam

Measurements of Decomposed EPS Gases Pressure and Molten Metal-Polymeric Foam Interface Velocity During Lost Foam Casting Process: Part 2—Rectangular Bars Casting

2000 ◽  
Author(s):  
Sayavur I. Bakhtiyarov ◽  
Ruel A. Overfelt
Keyword(s):  
Liquid Metal ◽  
Pressure Fluctuations ◽  
Metal Flow ◽  
Interface Velocity ◽  
Casting Process ◽  
Lost Foam Casting ◽  
Polymeric Foam ◽  
Pattern Decomposition ◽  
Liquid Metal Flow ◽  
Lost Foam

Abstract The behavior of liquid metal flow and gas pressure of the evaporated styrofoam pattern decomposition by-products inside the mold and surrounding sand for ductile iron was investigated experimentally. A computer aided thermometric and pressure measurement technique was built to study the heat and pressure related processes in the lost foam casting. A complete pattern of temperature/pressure fluctuations is obtained during the rectangular bar casting. A relationship between liquid metal front velocity, mold filling rate, decomposed EPS gases pressure, distance from the gating and mass of decomposed EPS is found.

Filling Pattern of Step Gating System in Lost Foam Casting Process and its Application

2012 ◽  
Vol 602-604 ◽  
pp. 1916-1921 ◽  
Author(s):  
Hong Zhou ◽  
Li Heng Luo
Keyword(s):  
Liquid Metal ◽  
Casting Process ◽  
Lost Foam Casting ◽  
Casting Defect ◽  
Gating System ◽  
Filling Process ◽  
Filling Pattern ◽  
Metal Volume ◽  
The Common ◽  
Lost Foam

To explore application of step gating system in LFC, filling process of two types of step gating system was simulated, their filling patterns were found, and several engineering examples were analyzed basing on these patterns. It was found the metal start filling through all ingates almost simultaneously if the gating system is open, otherwise the sequence of the ingate filling follow increasing sequence of streamline length from the inlet. It was also found the metal volume through each ingate increased gradually bottom-top when the common step gating system is filled by EPS, but when the common step gating system is open or step gating system have an auxiliary sprue, the metal volume decreases gradually. Analysis on several engineering examples shows the simulation confluence of two liquid metal fronts is basically in accordance with the casting defect locations.

Liquid Metal Stream Junction Defects in Aluminum Lost Foam Casting

2002 ◽  
Author(s):  
Sayavur I. Bakhtiyarov ◽  
Ruel A. Overfelt ◽  
Amit Suryawanshi
Keyword(s):  
Liquid Metal ◽  
Process Parameters ◽  
Mold Filling ◽  
Metal Stream ◽  
Lost Foam Casting ◽  
Lost Foam

The purpose of this work is to study fold defects in gravity and counter gravity lost foam casting processes, and to determine the process parameters which will improve the casting properties. The experiments are focused on the time and spatial dependent aspects of mold filling in frame shape styrofoam patterns.

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