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Patent Details

Indian Institute of Technology (IIT) Patna 
An apparatus and a method for cryogenic machining of polymers materials  
A.K. Sinha & Dr. Karali Patra 
Indian Institute of Technology (IIT) Patna 
Application type:
Applied - 2018-09-26 
Application Number:
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Indian Institute of Technology (IIT) Patna 
The present invention relates an apparatus and a method for micromachining of soft polymeric materials under a controlled environment. Accordingly, a novel apparatus is designed for machining polymer workpiece comprising of an insulated chamber housing a tool and a workpiece, wherein said workpiece is held by a workpiece holding fixture and aligned with the tool. Further the apparatus includes a cryogenic supply unit for cooling said workpiece and said tool, wherein said supply unit carrying cryogenic liquid is connected to the chamber through a delivery tube, the delivery tube directs the cryogen liquid from the supply unit onto the workpiece and the tool. And a process controller integrated with a pressure regulator, a strip heater and a temperature sensor, enables said controller to measure, monitor and control the inside temperature of the chamber for cryogenic machining of polymers under controlled environment.  

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