Bending of plastics with machine tools
Bending of plastics with machine tools
Bending on a machine is a very efficient process that ensures high quality work. There are several ways to bend plastic.
There are two main ones: cold bending or hot bending on a machine.
Depending on the bending method, we can bend plastics such as: plexiglass (PMMA), polyester (PET), polycarbonate (PC), polyvinyl chloride (PVC), polystyrene (PS), polyethylene (PE), polypropylene (PP) etc. We can bend parts up to 2050 mm long and 25 mm thick.Hot bending Almost all plastics can be bent with this machine.
It is particularly widespread in advertising production – for example for bending plexiglass (various boxes, holders, stands, information stands and many others).
- To hot bend plastic, it is heated to certain temperatures.
- After heating, the plastic is moulded (bent) into the desired shape.
- In order to fold one or more edges and obtain the desired shape, the machines are used to heat only certain areas, then the plastic is placed in special holders and left to cool.
- After cooling, the material takes on a shape that can only be changed when it is heated again.
To ensure that the material receives as little “stress” as possible, we use professional bending machines that can make one to several bends at a time. Cold bending Not all plastics can be cold bent.
The principle of bending is similar to metal bending.
We can bend plastics at different degrees.
Cold bending does not heat the material and therefore avoids elongation.