Resin Purchase Quantity Calculator

Estimate virgin resin purchase mass and package count for a production order. Use this as a documented planning estimate, then validate it against the actual machine, mold, resin, and process.

Formula and method

Purchase mass = good parts x allocated resin mass x (1 + unrecovered scrap).

Use weighed part/runner mass, cavity allocation, loss policy, and a real package size.

Inputs and units

Use controlled records, CAD, measured production data, the exact resin data sheet, or machine-maker specifications. Keep the material and time basis with the result.

Worked example

100,000 parts x 52 g x 3% loss = 5,356 kg, or 215 bags of 25 kg.

What the result supports

This result is a first-pass screen for materials planning. Use it to identify the next record or engineering check, not as a release decision.

Sanity check

Check the unit basis and whether all quantities describe the same cavity, shot, machine, or production window before comparing values.

Important limitation

Inventory, purge, recycle policy, and supplier minimums are outside the estimate.

Reference: BASF Ultradur processing notes.

Next calculation

Runner Weight Calculator · Regrind Blend Calculator · Masterbatch Dosage Calculator

FAQ

What must be checked after using resin purchase quantity calculator?

Retain the input source and compare this estimate with the applicable machine, mold, supplier, or production record before relying on it.