Plastics Machinery Inc.

Aleck Smart IMM Selector

LS Mtron press and screw sizing

LS Mtron
Plastics Machinery Inc.

Project

Units

Length, area, and part weight follow this. Shot stays honest either way.

Language

Resin

Typical handbook figures. Edit any of them. Clear a field to return to the typical value. Clamp factor stays where you typed it.

g/cm³
g/cm³
°C
°C
°C

m²/s. Clear to use the typical value.

These are handbook midpoints, not LS Mtron figures. Override the factor below if you have a better number. 2.5 US ton/in² · 0.74 g/cm³ · 2–5 min.

Application

Quick comparison

Clamp tonnage is required. Shot size is optional and picks a screw. Leave the part blank for a like-for-like tonnage match. Enter the part for a full sizing.

Required for this comparison. US tons, the same unit as the LS Mtron catalogue.

US ton

Optional. Picks a screw. Inside 40–60% is preferred, then 20–80%.

g

Energy estimate

A yearly estimate from the drive motor plus the barrel heater. Defaults are 16 hours a day, 250 days, and 0.14 per kWh. The load factor is how hard the press works, starting at 40%. A full-electric drive motor is counted at 12% of its nameplate, because the sheet adds up the servo peaks. If the sheet does not list both the drive and the heater, nothing is shown.

h
/kWh

How hard the pump and heaters work. 40% is a starting point. Full-electric drive motors stay at 12%.

%
g

Thickness is used to estimate cooling and fill. Leave it blank if you don't know it.

mm

Leave blank and we'll estimate. Enter your own if you know it.

s

Leave blank and we'll estimate cooling from wall thickness and material. Enter your own if you already know it.

s

Optional. The longest path from the gate. Used only for fill time, not for clamp.

mm

Runner

Total, not per cavity. Leave blank if you don't know it. Nothing is invented.

g

Projected area

Used as entered, not multiplied.

cm²

Safety margin

One factor only. No extra bump for cavities, thin wall, or 2-shot. PMI usually uses 10–20%.

Mold

Leave a size blank if you don't know it. A blank is not checked, and it is not guessed.

mm
mm
mm

Daylight minus shut height must cover this.

mm

Checked against ejector stroke.

mm
Advanced options (optional)

Share of time the press is making good parts. Default 85%.

%

Tons of clamp per square inch. Filled from the material; change only if you know better.

T/in²

Already know the tonnage you need? Enter it and we'll skip the area calculation.

US ton

Printed on the spec sheet. Not used for sizing.

parts

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Recommendation

Three presses, with the reason

Enter the part and choose See machines. You get the smallest LS Mtron press that clears clamp, tie bars, platen, mold height, opening, ejector, and shot — plus one size down and one size up. Every check shows its margin. A press that is short on clamp is never called a fit.

Or start from a quick pick above: a 48-cavity closure, a medical PC part, a thin-wall lid, an automotive bezel, or an insert on a vertical.