The daylight in injection molding machine is space or distance between fixed platen and moving platen during open and close clamping on a injection molding machine.
The minimum and maximum daylight in injection molding machine determines the sizes of the items it can make.
The maximum daylight has to accommodate height of moving half of mould, height of moulded part, minimum and enough clearance for removal of moulded part and height of fixed half of mould.
Formula to calculate the day light of the toggle injection molding machines:
Maximum daylight = Maximum mould height + mould open stroke.
Minimum daylight = Minimum mould height + mould open stroke.
With Hydraulic clamp machine, Maximum daylight = Minimum mould height + mould open stroke.
If shut mould height is more than minimum mould height of machine then the mould open stroke is reduced to the extent of difference in shut mould height of mould and minimum mould height of machine.
MAXIMUM DAYLIGHT
The shut mould height of the mould should be less than 1/3rd of maximum daylight so that there should be enough room for the ejection of part when mould platen is fully opened. If it is closer to 1/3rd of maximum daylight then the clearance between core and cavity of mould in fully open position should be verified on the drawing board.
The maximum daylight has to accommodate height of moving half of mould, height of moulded part, minimum and enough clearance for removal of moulded part and height of fixed half of mould.
In case of Toggle machine, Maximum daylight = Maximum mould height + Mould open stroke. Mould open stroke remains constant in toggle machine.
MAXIMUM DAYLIGHT AND MOULD OPEN STROKE
Maximum daylight as well as mould open stroke depends on toggle geometry whereas hydraulic clamp machine can be built easily for larger daylight by simply providing longer cylinder and longer tie bars. The longer mould open stroke can be provided by using longer clamp cylinder and ram. Therefor it is easier to satisfy special requirements of customers.
In hydraulic clamp machine
Mould open stroke = Maximum day-light minus Closed mould height.
SPECIAL PROMOTION
