ASNT Level III- Visual & Optical Testing
My Level III Self Study Notes Reading 4 Section 4B
My Level III Self Study Notes Reading 4 Section 4B
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6.3.6 Precise Post forming Heat Control<br />
Temperature indicating materials are incorporated into<br />
many industrial applications where an indication is needed<br />
to show that a critical temperature has or has not been<br />
reached. A phase changing fusible liquid is used to indicate<br />
optimum postforming temperatures when bending decorative<br />
laminate for the contoured edges of countertops, desks,<br />
tables and other surfaces (see Fig. 66).<br />
Postforming is the process of bending a flat sheet of laminate<br />
around a radiused core material (particle board, plywood<br />
or fiber board). The process is typically done after controlled heating<br />
monitored with temperature sensitive liquids. Postforming can be a manual or<br />
mechanical operation. Hand postforming is used for unusual configurations or<br />
limited quantity production and mechanical postforming is used<br />
for high quantity production. Both methods have the need for a heat source,<br />
prepared cores, postforming grades of decorative laminate, pressuring guides<br />
and evenly applied pressure.<br />
Charlie Chong/ Fion Zhang
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