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ABS (Acrylontrile-Butadiene-Styrene)

Also Known As

  • Cycolac
  • Lustran
  • Magnum
  • Novodur
  • Ronfalin
  • Terluran

Typical Machine Settings: Subject To Polymer Grade

Nozzle

Front

Centre

Rear

Barrel Temperature

225 - 250oC

225 - 250oC

210 - 225oC

195 - 205oC

Melt Temperature

230 - 260oC

Must be measured with a pyrometer by taking an airshot through the injection machine nozzle.

Hot Runner Temperature

235 - 260oC

Mould Temperature

50 - 95oC

Run at upper end of range for best surface finish.

Injection Rate

Slow To Moderate

Specific Injection Pressure

700 - 1400 Bar (10,000 - 20,000psi)

Screw Back Pressure

3.5 Bar (50psi)

Screw Speed

30 - 60 rpm

Processing Features

Structure

Amorphous

Specific Gravity

1.05

Viscosity

Medium

Shear Rate Susceptibility

Medium

Average gates can be used

Temperature Window

Medium

Needs fairly accurate & stable control

Residence Time

Medium

Aim for short residence time

Start-Up Precedure
  • Ensure all heaters are thoroughly baked dry - do not rely on brief ‘soft start’ systems to do this.
  • Fast Heat controllers automatically and safely bakeout wet heaters - ask for details.
  • Turn on water lines to stabilise tool and manifold temperatures.
  • Turn on manifold control zone(s) and allow to warm up until measured value is within 10oC of setpoint.
  • Now turn on tip zones and allow to settle at setpoint for 5 - 10 minutes before starting production.
  • Take an airshot from the machine barrel and check that the melt temperature is correct.
  • Start moulding parts on a semi-automatic cycle until suitable machine settings are established.
  • Avoid lengthy delays between cycles during this setting procedure.
  • Switch to automatic cycle when parts are being produced, and fine tune the machine settings

Shut-Down Precedure

The machine and mould may be shut-down normally, without cleaning the ABS from either the barrel or the hot runner.