Nominal Fixed-Die Thickness

In the diagram to the right, the base of the nozzle seat is in line with the inside face of the fixed machine platen. The Sprue Bush is marked 'S' and the clamping ring 'C'. The shaded component represents a location ring, which has been added by thje user to locate the die with the hole in the platen for this particular machine.

This is the nominal alignment scenario, for which all the "Die Machining Dimensions" have been calculated.

Thicker Dies

If the total Fixed-Die thickness (die block + mounting plate + insulation plate) exceeds the nominal thickness, the nozzle seat will be recessed further into the die as shown here.

This does not normally present any operational problems provided that the machine nozzle length and stroke are adequate, and the nozzle heating is not restricted.

The die machining dimensions must be adjusted appropriately, and a longer location ring must be made.

Thinner Dies

Alternatively, if the total Fixed-Die thickness is less than the nominal thickness, the nozzle seat will protrude into the hole in the fixed machine platen.

This will still function well provided :

• the platen hole is sufficiently large
• the nozzle length is adjusted appropriately
• the Clamping Ring (C) is fitted with a spacer or a special version is made to suit.