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Acrylic Sheet, Rod and Tube: Cast and Extruded
Acrylic (PMMA) stock is made two ways. Cast acrylic is liquid methyl methacrylate, mixed with an initiator, poured between glass plates (cell casting) or into moulds and left to polymerise into solid sheet or rod; tube is cast in a spinning mould. Extruded acrylic is pellets melted and forced through a die and polished rollers, continuously. Cast sheet is the better grade: steadier with heat and solvents, clearer, more scratch resistant and better to machine; extruded sheet is cheaper and more even in thickness.
Abantado
Hours per cast sheet (industrial)
Mga Tagubilin
1
1
Cell cast sheet
Cell cast sheet
Monomer syrup with initiator is poured between two glass plates held apart by a flexible gasket and polymerised in a heated bath or oven, then the plates are stripped off.
Mga materyales para sa hakbang na ito:
Sirup ng methyl methacrylate50 kgMga kailangang kasangkapan:
Pugon ng pagpapalambot2
2
Cast rod and tube
Cast rod and tube
Rod is cast in static tubular moulds; tube in a mould spun so the syrup lines its wall.
Mga kailangang kasangkapan:
Pugon ng pagpapalambot3
3
Extruded sheet
Extruded sheet
Dried acrylic pellets are melted, pushed through a sheet die and pulled through polished rollers.
Mga materyales para sa hakbang na ito:
Butil na akrilik50 kgMga kailangang kasangkapan:
Pantuyo ng butil
Extruder ng plastik
Hopper na tagapagpakain ng pelet
Die ng extrusion4
4
Anneal and check
Anneal and check
Sheets are annealed to relieve stress, covered with protective film and measured for thickness.
Mga kailangang kasangkapan:
Pugon ng pagpapalambot
Digital na Kalibrador 6 PulgadaMga Materyales
2- Placeholder
- 50 kgPlaceholder
Mga Kinakailangang Kasangkapan
6- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
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