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i-11Rheo-Pro Hot Runner Gate Sizing®

Pr

oces

s

Par

t

M

ater

ial

Tip

Styl

e

Bubble tip

Flat tip

Dimple Tip

Stock Sprue

Plunge Thru

Bubble Valve

Plunge Thru

Structure

Molecular weight

Melt flow index

Reinforcements, Fillers

Additives, Flame retardants

Heat, Shear sensitivity

Solidification rate of material

Shot weight

Wall thickness, Flow length

Tolerances

Gate mark, Gate vestige

End use

Temperature window

Injection speed

Pressure drop created

Effect of holding pressure

Gate Dimensions (mm)

Amorphous

Low

High

None

None

Not Recommended

Slow

Low

Small

High

Best

Cosmetic

Wide

Low

High

Less

Semi-crystalline

Medium

Medium

Low

Suitable

Medium

Medium

Medium

Medium

Better

Medium

Medium

Medium

Normal

Crystalline

High

Low

High

Added

Recommended

Fast

High

Large

Narrow

Good

Technical

Narrow

High

Low

More

The size of the gate diameter depends on a number of factors. Their rating or influence is different for each application. The chart provides a guide line only. Please go through the check list below to determine the trend for selecting a smaller or larger gate orifice in relation to the average gate diameter shown in the middle row under gate dimensions.

0.8

0.8

0.8

0.8

1.5

3.0

3.0

1.4

1.4

1.4

1.4

2.5

4.0

4.0

2.5

2.5

2.5

2.5

3.5

5.0

5.0

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