Every molding shop has a place where old, tired, worn-out molds go to die. A back corner, a far skid, a dark end of the warehouse where tools rust away slowly into a pile of liability nobody wants to look at. Alongside the molds you’ll usually find the rest of the orphans: ultrasonic welding fixtures, shrink fixtures, end-of-arm robot tooling, check gauges, and assorted jigs from jobs that ended years ago.
There’s a quiet irony in how tooling gets treated over its life. When a mold is new and shiny, the shop keeps a mountain of records — purchase orders, qualification reports, process sheets, first-article data. Then the job winds down, and those documents drift off to wherever obsolete paperwork goes. Years later someone finds the rust-bucket mold in the bone yard and discovers the records that would tell them whose it is and what it’s worth are long gone — exactly when they’d be useful.
This guide doesn’t reproduce historical WJT Associates material. It uses the same applied logic — a tool is an asset and a liability, not just steel in a corner — to manage idle and obsolete tooling without creating legal or financial risk.
The consignment reality: you hold it, they own it, you’re liable
The thing that makes a bone yard dangerous rather than just messy is ownership. Unless you’re a captive molder running your own products, most of the tooling in your building is consignment tooling: the customer owns it, you physically hold it, and you’re liable for it the whole time it sits there.
That arrangement has consequences most shops don’t think about until they bite:
- You can’t scrap it on your own authority. It’s not your asset to dispose of, no matter how worn or how long it’s sat. Scrapping a customer’s tool without written permission is destroying someone else’s property.
- You’re responsible for its condition. A consigned tool that rusts, seizes, or gets damaged in your care is a problem you may have to answer for — even if the customer hasn’t ordered from it in years.
- It’s costing you, silently. Floor space, indexing, rust prevention, and the liability itself all have a cost that no purchase order is paying for. Customers who leave obsolete tooling parked with their suppliers are using the supplier base as a free warehouse.
| The tool is… | Who it belongs to | Your position |
|---|---|---|
| Active consignment tooling | The customer | Hold, maintain, run, document |
| Idle consignment tooling | The customer | Still liable; still your floor space; decision needed |
| Obsolete consignment tooling | The customer | Liability with no revenue — clean house, but only with permission |
| Your own (captive) tooling | You | Your call to retire or scrap |
Cleaning house without creating risk
The goal isn’t to dump everything in a skip — it’s to convert an unmanaged liability into a documented, decided inventory. A workable sequence:
- Inventory the bone yard. Every mold, fixture, gauge, and EOAT — what it is, what it made, and its condition.
- Establish ownership for each item. Captive (yours) or consignment (whose)? If the records vanished, this is the painful step — which is the whole argument for not letting records vanish.
- Contact the owners. For each consigned tool, ask the customer for a decision: order from it again, pay to keep it stored, take it back, or authorize disposal.
- Get disposal in writing — always. Never scrap, sell, or strip a consigned tool without written authorization from the owner. “They said it was fine on the phone” is not a defense.
- Document the outcome. Whatever happens — returned, retained, scrapped — record it, so the bone yard doesn’t silently refill.
This is also the moment to put a price on storage. A customer parking obsolete tooling on your floor indefinitely is consuming something real; a storage agreement or a “decide by this date” conversation is a fair way to stop subsidizing it.
When a tool leaves: what goes with it
The bone-yard problem has a mirror image: the day a customer sends the “ship our tooling elsewhere” letter and asks for “all accompanying documentation.” Now the question flips — what actually belongs to them, and what’s yours?
A few principles that protect the shop:
- Don’t let the tooling leave until your account is settled. The strongest moment to collect outstanding invoices is while you still hold the customer’s property. Once it’s on the truck, your leverage is gone.
- Separate their property from your know-how. The tool and its qualification belong to the customer. The process refinements, internal procedures, and trade secrets you developed are a grayer area — confidential or proprietary material isn’t automatically theirs just because they own the steel.
- Have the terms in writing before you ever store a tool. A short agreement up front — covering storage, liability, who pays for what, and what happens to unpaid finished goods, work in progress, and raw materials if the relationship ends — prevents the worst surprises. Negotiating those terms during a breakup is negotiating from weakness.
Keep the records with the tool, for its whole life
The thread running through all of this is documentation. The reason a bone yard becomes a liability is that the records die before the tool does. The fix is to treat the tool’s paperwork as part of the tool — ownership, the consignment agreement, qualification data, the process sheet, and a maintenance history that stays attached from build to retirement.
A tool with its records is a managed asset: you know whose it is, what it can still do, and what it’s worth. A tool without them is just a rusting question mark you’re liable for. The difference is entirely in whether anyone kept the file.
FAQs
Can I scrap an old mold that’s been sitting unused for years?
Not if it’s consignment tooling — which most tooling in a custom shop is. The customer owns the steel even if they haven’t ordered from it in years and even if it’s worn out. Scrapping, selling, or stripping it without written authorization from the owner is destroying someone else’s property and can create real liability. Inventory it, establish who owns it, and get a written decision (run, store, return, or authorize disposal) before anything goes to scrap.
Who’s responsible for tooling stored at the molder?
With consignment tooling, the customer owns it but the molder holds it and is generally liable for its condition while it’s in their care. That’s what makes idle tooling more than a space problem — a tool that rusts, seizes, or is damaged on your floor can come back on you even with no active orders. It also means the storage, rust prevention, and floor space are real costs the molder absorbs unless a storage agreement says otherwise.
A customer is pulling their tooling — what documentation do I have to hand over?
The tool and its qualification records belong to the customer and go with it. Your internal process refinements, procedures, and trade secrets are a separate, grayer category — owning the steel doesn’t automatically entitle a customer to the proprietary know-how you developed around it. Two practical protections: settle any outstanding invoices before the tooling leaves your possession (that’s your leverage), and ideally have agreed in writing up front what transfers and what doesn’t.
How do I stop the bone yard from filling up again?
Keep each tool’s records attached to the tool for its entire life — ownership, the consignment agreement, qualification data, process sheet, and maintenance history — and put idle tooling on a periodic review. When a job goes dormant, ask the owner for a decision and a storage arrangement rather than letting the mold drift to the back corner undocumented. The bone yard forms when records die before tools do; keeping the paperwork alive is what prevents it.