No two jobs are quite alike: HR for industrial rubber parts makers

A worn anti-vibration mount arrives at the gate in a gunny bag on a Thursday. There is no drawing, only a note from a maintenance fitter at a cement plant: same as last time, needed Monday. Somebody has to find which mould fits, which compound was used, and whether the steel plate was blasted and primed in-house. If the one press operator who ran it last year is on leave, the answer sits in nobody's head.

That is the daily texture of an industrial rubber parts maker. Pads, bushes, rollers, chute linings and metal-bonded parts come as small lots, each with its own quirks. The people questions follow from it: who can cope with a fresh set-up every morning, how that skill is taught, and how it is kept when someone leaves.

• A sample with no drawing, so a fitter measures the worn part and guesses the original bore.
• A drawing with a revision letter that nobody on the night shift has seen before.
• A two-cavity mould where one cavity was blocked after a crack, recorded only in the setter's memory.
• A change of Shore hardness on the same part number, so cure time and press temperature shift.
• Customer-supplied inserts that arrive oily, rusted or a few millimetres off the last batch.
• A roller to be recovered, where the old cover must be stripped and the core checked for run-out first.
• A lining sheet for a hopper or chute, cut and bonded on site dimensions sent by phone.

None of these is unusual. Together they mean the crew rarely runs the same set-up twice in a week. Operators who came from a high-volume line making one seal all shift often find this tiring. Some leave within months, and the exit form says nearer home.

The cost is spread thin, which is why it goes unnoticed. First-off parts get scrapped while the cure is dialled in. A press sits warm during a trial. The mould fitter is pulled from repairs to help a new operator. A bonded bush that looked fine fails in the customer's crusher because the primer had dried too long. The estimator quotes from memory of a similar job and misjudges the trimming time. Each event is small. Across a month of job orders they add up to lost press hours and a few unhappy buyers.

Most units hire press hands like a volume moulder would. Can you load a mould, trim, work nights? That screens for stamina. It does not screen for the habits that matter here. Can the person read a dimensioned sketch? Do they check a cure chart before pressing the cycle button? Will they ask when an insert looks wrong, or run it anyway?

The other gap is memory. The person who knows that a particular roller core warps if it is heated too quickly is often a senior fitter near retirement. Nobody has suggested he put it on paper. When he goes, the next roller job is relearned the hard way.

1. 1

   Issue a job card when the order is released

   Mould number, compound and hardness, insert preparation, cure time and temperature, and any customer remark. The planner fills it before the job reaches the press.

2. 2

   Close every job with a history sheet

   The operator notes what changed from the job card, faults seen and the fix. It takes five minutes at the end of the lot and saves an hour next time.

3. 3

   Name who signs off the first part

   Before the batch runs, a setter or quality hand compares the first-off with the drawing or sample. The name goes on the job card.

4. 4

   Pair people on unfamiliar job families

   Someone who has never run a roller recover does it alongside someone who has, at least twice, before running one alone.

5. 5

   Rotate job families on purpose

   Plan which operator takes which family each week, so nobody spends a year only trimming pads while the bonding skill stays with two people.

Part and customer: description, drawing or sample reference.
Mould: number, cavities in use, shims or spacers, rack location.
Compound: grade, hardness, batch used.
Insert: material, blast and clean method, primer, time from priming to moulding.
Press settings: platen temperature, cure time, bumping or degassing steps.
Finishing: trimming method, deflash, post-cure if any.
Faults seen this run and what fixed them.
Customer remarks or complaints since last run.
Filled by, date, checked by.

File the sheets part by part, near the mould store, not in the office. A spreadsheet works if someone owns it. The documentation approach for this business type covers how to keep job records and training records in a form the whole unit can read.

In the interview, hand the candidate a simple drawing of a bush and a sample. Ask them to point out the bore, the outer diameter and the bonded face. Which checks come before the first cycle? Their answer shows more than years of experience on a one-part line.

Then group your work into job families and make them the ladder. A person who can set up and run three families alone is worth more than one who runs a single family fast. Say so in pay. When each family learned brings a step, the unfamiliar job becomes a chance rather than a chore.

• Compression-moulded pads and plain mounts.
• Metal-bonded bushes and buffers, including blasting and priming.
• Roller covering, curing and grinding to size.
• Sheet linings cut and bonded for chutes and hoppers.
• Small transfer-moulded or precision parts with tight tolerances.

Bonding deserves its own route, written and tested. The training plan for this type can carry the cleaning, priming and timing steps, with a test bond pulled before anyone bonds alone.

A customer's conveyor stops and the order becomes urgent. That pushes an unfamiliar job onto whoever is free, often at night. A rule helps: one approval for rush work, an overtime rota shared fairly, and the planner told at once so displaced jobs are replanned. The rota and attendance notes for this type sets out how such a rota can work.

Pick the five parts you repeat most and check whether each has a history sheet. Ask which operators can set up more than two job families unaided. Count the rush orders last month and who worked them. Those three answers show where variety is costing you. Patterns shared across moulders, hose makers and belt makers sit on the rubber products hub. Want a hand drafting the job card, the family ladder and its pay steps? Describe your works on our short brief.