The smart factory in plastics manufacturing

Plastics manufacturing is rich in data and often poor in using it. Moulding machines and extruders know their cycle times and temperatures to a fraction. Very often, that data stays on the machine.

Meanwhile the questions that matter to the business, like scrap by tool, the real cycle time against standard and when the next mould service is due, get answered from a spreadsheet.

Where the value usually is

Cycle time against standard. A cycle that's a second slower than standard on a busy press is a lot of lost capacity over a year. Captured automatically, it becomes visible straight away.

Moulds and tooling. Shot counts, cavities running, maintenance due and the tool's history, tracked properly. A worn or damaged tool should be found by the system, not by the scrap. My article on tooling in MES covers what to track.

Process windows and SPC. Temperatures, pressures, times and dimensions monitored against limits, so drift is caught while the part is still good.

Material and regrind. Resin, masterbatch, additives and regrind tracked by job, with lot traceability back to the material supplier.

What makes it harder here

Machine data is plentiful, so the risk is collecting everything and using none of it. Decide which signals answer real questions before connecting every parameter. MES/MOM reads and contextualises the process data most jobs need, so a separate historian is rarely needed. See historian vs MES.

Multi-cavity tools complicate counting and quality. If a cavity is blocked off, standard rates and quality checks need to know.

Questions to settle before you look at vendors

• How do we know the real cycle time on each press today?
• How do we track mould life and cavity status?
• Which process parameters actually predict quality for our parts?
• Where should high-frequency machine data live, and who will use it?