Yr.10. Unit 2. Line Bending

Plastics are one of the easiest materials to shape. Thermoplastics, such as acrylic, can easily be bent, pressed or blown into shape at a temperatures around 160°C•Plastics are one of the easiest materials to shape. Thermoplastics, such as acrylic, can easily be bent, pressed or blown into shape at a temperatures around 160°C

• Plastic can be formed (shaped) in different ways

• One of the most popular methods of shaping plastic materials is to fold (bend) it on a 'strip heater'

• Strip heaters use a heating element extending along the length of the heater unit & gives off intense heat when turned on

• Line bending is a process whereby a peice of plastic is bent along a narrowly defined "line"

• A electrical element is mounted below a narrow opening or channel between two pieces of heat resistant material or metal bars

• The element begins to heat the surface of the plastic sitting above it

• The plastic begins to soften along the line of the heating element and becomes flexible and pliable

​•Once heated the plastic can be shaped to the correct angle, either by hand or by using a simple former or jig

​•Line bending products often consist of display stands, plastic boxes, leaflet dispensers, or furniture such as outdoor furniture or acrylic tables. Line bending is used to create simple shapes, where the clean look of the product is a primary focus.

•Whilst line bending is limited to the production of plastic products, a range of plastics can be used to meet product requirements such as acrylic, Rigid Polystyrene & Perspex 

​No additional tooling required

Creates seamless bends, straight bends with small radiuses can be created

Relatively simple process

Plastic can be reheated and reformed if the process is miscalculated, reducing scrap and manufacturing costs.

​Only simple shapes can be created

Former or jig is required shape the plastic

Restriction to the number of bends in a single sheet

Stress bends can occur which can deform the plastic

Additional processes such as cutting may be required.

​•Wear safety glasses

•Keep fingers away from heated element

•Take care when handling HOT plastic

•This machine is a fire hazard! Keep away from flammable materials, and never leave the machine unattended when actively heating plastic.

•Inform a member of staff if the machine is damaged in an way

•Do not touch damaged wires