Vacuum Forming Plastic Temperature

Vacuum forming is a simplified version of thermoforming where a sheet of plastic is heated to a forming temperature stretched onto a single surface mold and forced against the mold by a vacuum.

Vacuum forming plastic temperature. Thermoforming is a process where thermoplastic sheets are heated to a pliable temperature formed to a specific shape using a mold and trimmed to create a finished product. Relatively deep parts can be formed if the formable sheet is mechanically o. They go very rapidly from a glass transition state to a melt transition state. Vacuum forming takes it one step further.

Semi crystalline thermoplastics that are sometimes vacuum formed are pp hdpe and ldpe. This process can be used to form plastic into permanent objects such as turnpike signs and protective covers. Normally draft angles are present in the design of the mold to ease removal of the formed plastic part from the mold. Processing limit f c f c f c f c f c acrylonitrile butadiene styrene abs 185 85 260 127 280 138 300 310 149 154 360 182.

For example let s use 0 250 in. Sheet surface temperature will directly correspond to material gage. Forming temperature guidelines material mold set lower orienting normal forming upper temperature processing limit temperature core temp. High density polyethylene hdpe which requires a core temperature of approximately 280 f for optimal forming.

Semi crystalline thermoplastics have a far more critical forming temperature then that of amorphous materials.