7 nptel casting

Please download to get full document.

View again

of 26
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Information Report
Category:

Documents

Published:

Views: 15 | Pages: 26

Extension: PDF | Download: 0

Share
Related documents
Description
Molding Sand Testing 1
Transcript
  TECHNOLOGY OF PATTERNMAKING Pattern types and Allowances DrPradeep Kumar Jha MIED, IIT ROORKEE 1  TYPES OF PATTERN   Single Piece Pattern   Split Pattern or Two Piece Pattern   Gated Pattern   Cope and Drag Pattern   Match Plate pattern   Loose Piece pattern   Follow Board pattern   Sweep Pattern   Skeleton Pattern  SINGLE PIECE OR SOLID PATTERN   Simplest and least inexpensive to make.   They are made of a single piece.   It is used for relatively simple shapes, very small scale production, in prototype development.   This pattern should be entirely in the drag.   To avoid withdrawal problem, one of thesurfaces should be flat so that it can be used as parting plane. 3    When contour of the casting makes itswithdrawal from the mold difficult or when the depth of the casting is toohigh, pattern is spit into two parts.   Used for intricate castings.   Split surface of the pattern is same as theparting plane of the mold.   Dowel pins are used to align two halves. SPLIT OR TWO PIECE PATTERN
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks