WAX INJECTION - Investment Castings process starts with production of wax patterns by injecting wax in to dies. A pattern is required for each castings. Wax patterns have exact dimensions of the required finished castings, subject to shrinkage etc. |
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PATTERN ASSEMBLE - Wax patterns are then assembled to one or more runners and then runners are attached to pouring cups. This assembly when completed is called tree or cluster. |
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SHELLING - This process involves dipping the tree or cluster in to different types of ceramic slurry, draining it then again coating. This process is repeated until desired shell thickness is achieved. |
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DEWAXING - The coated cluster is placed in a high temperature furnace where the pattern melts and runs out through the gates, runners and pouring cu. This leaves a ceramic shell containing cavities of the casting shape desired with passages leading to them. |
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