Acrylic forming and shaping, acrylic bending
Acrylic and polycarbonate are thermoplastics. This feature is used in acrylic forming and bending or polycarbonate bending. We do custom manufacturing of formed and bent parts. Basic bent types can be divided into following:
1) Bending without radius length requirements
We are able to bend sheets up to 2000mm wide and 12mm thick. Bending is conducted with local heat treatment (specific zone) and flexion in desired angle.
2) Bending at given specific radius length (up to cca R40 mm)
Accurate bending can be only achieved using a mold. Prior actual manufacturing a mold with required radius must be prepared. Flexion occurs once the material sheet gets local heat treatment and is placed in pre-finished mold.
3) Sheet bending at long radius
Acrylic bending at long radiuses is kind of challenging but still possible. In this case entire material sheet is placed into furnace. Sheet is placed into mold and gets annealed for extended period of time. This ensures accuracy to the mold. Entire piece of acrylic is heat treated, not only specific zone.
All molds necessary for production of complex bent parts are made in our shop. Our experience allow us to assess options of using positive or negative molds.
Acrylic forming and flexions manufacturing
4) Cold bending
Cold bent can only be non-shattering materials. Non-shattering material is particularly polycarbonate PC. Bend joint must be over-bent by 6°-9° more compared to drawings and plans. Material then tends to "travel back" to its original shape just as much as 6°-9°.
Acrylic bending principle
If we bend acrylic with short overlap, say 30mm, deflection occurs.
Deflection is caused by local heat treatment and subsequent tension within material after flexion.
Acrylic and polycarbonate are known for their negative feature and that is they spontaneously absorb air humidity. Acrylic materials must be dried in furnaces before bending to avoid bubbles once locally heat treated for bending.