Guides

Guide

Injection Molding Resin Preparation: Blend Ratios, Moisture, and Residence Time

Calculate injection molding resin blends, masterbatch dosage, moisture changes, dryer inventory, and barrel residence time on consistent bases.

Guide

Reconcile injection molding resin requirements, approved regrind, usable inventory, and supplier pack sizes before releasing a purchase order.

Guide

Calculate resin packaging quantities from required mass, supplier pack weight, and usable stock. Compare whole bags, Gaylords, and excess resin.

Guide

Calculate virgin resin requirements from gross injection molding feed, an approved regrind percentage, usable inventory, and purchasing allowances.

Guide

Calculate how setup shots and part rejection change an injection molding resin order, with yield formulas, an example, and purchasing adjustments.

Guide

Calculate gross resin feed for an injection molding order using good-part demand, active cavities, shot weight, rejection rate, and startup losses.

Guide

Compare cold runner vs. hot runner shot weight, count ejected material correctly, and separate machine-capacity checks from resin purchasing.

Guide

Estimate runner and sprue weight from a measured molding shot using part weight and cavity count, with weighing steps and a worked example.

Guide

Calculate injection molding shot weight from part mass, active cavities, and runner mass, with worked examples and checks against weighed shots.