Match every bottle, jar and closure to its mould, resin lot and fit test.

A rigid packaging plant makes containers that keep their shape. Injection machines mould preforms and caps, and stretch blow machines reheat the preforms and inflate them into bottles. Jar and tub lines mould the body in one step. Cavity count sets the output. A filler cares about neck finish, wall thickness, brimful volume and a cap that threads on without weeping. One drifting gram of resin adds up across a million bottles.

Software for rigid packaging makers keeps the container specification, the resin lots and the moulds in one record. Planners see each injection and blow machine as its own queue, with the mould fitted and the cavities live. Quality staff see which lot a fit test belongs to. Sales staff see what was quoted. Nobody walks the floor to ask. The answers are on screen.

A beverage or cosmetics filler sends a container drawing with brimful volume, neck finish, weight and colour, plus a closure specification. The planner books the order on an injection machine for preforms or on a stretch blow machine, and the store issues resin from the desiccant dryer by lot. The mould is fitted with its cavity count, and the setter records the first-off sample against the drawing. Cycle time and shot weight are logged through the shift, so drift is caught early.

Bottles and caps are decorated if the order asks for it, with screen printing, pressure-sensitive labels or shrink sleeves. Quality staff check weight, wall thickness, top-load strength, removal torque on the cap and a pressure decay leak test on a sample. Flash, short shots, black specks and burn marks are counted against the cavity that made them, and the supervisor who signs the batch sheet reads the totals at handover. Containers are packed in cartons or bulk bags on pallets, and the packing list carries the lot number, the count per carton and the cartons per tier.