The only major variable that can affect the forming process is the thickness of the plastic sheet.
Acrylic sheet shrinkage.
One major difference between acrylic and glass is that acrylic does not shrink with age.
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For thicker sheets it will take longer and for thinner sheets it will take less time.
Parts made from multiple pieces of acrylic are usually joined together using solvents that melt each.
The shrinkage of plastics signifies the volume contraction of polymers during the cooling step of the processing of polymers.
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Acrylic sheet is also more flexible than glass and many other building materials.
Differential shrinkages are not considered.
Some shrinkage may occur when general purpose acrylite is heated to forming temperature but post forming stability is exceptional.
Acrylic sheets can be relatively easily heated and formed to a desired shape.
Enter dimension calculate material shrinkage post shrinkage dimension abs 0 6 abs pc alloy 0 7 acetal 1 8 acrylic 0 6.
This article uses a sheet about 1 4 thick so all times are about 10 to 15 minutes per step.
Most of the plastic molded part shrinkage occurs in the mold while cooling.
Simple bends can be made by heating the bend point with a wire heater.
This contraction is partly due to the difference of density of polymers from the melt state and the cooled rigid state.