Overflow Your Toolmaking Without Losing the Customer // Alliance Tooling Blog

Alliance Tooling explores a familiar challenge for injection moulders: an injection moulding customer asks for a new tool, or an existing one needs urgent work, and your toolroom is already full. Or you have no toolroom at all and rely on outside toolmakers for every new mould.

Either way, the choice is the same: turn the work away, quote a lead time the customer won’t accept, or hand the job to another toolmaker.

The third option is usually the right one, but it carries a worry most moulders recognise. The customer relationship is yours, and you have built it over years. Bringing in an outside toolmaker means sharing part data, tool drawings and sometimes the customer’s name with a business you don’t control.

This article covers when overflow toolmaking makes sense, where the real risks to the customer relationship lie, and what to agree with a toolmaker before the first tool so the relationship stays yours.

When Overflow Toolmaking Makes Sense

Overflow work is not a sign that something has gone wrong. Most moulders hit at least one of these situations every year:

• Capacity peaks. Several new-product launches land at once, and the toolroom can’t build them all without pushing back maintenance or other customers.
• No in-house toolroom. Many moulders run presses but not a toolroom, so every new tool is built outside. The question is not whether to outsource, but who to trust with it.
• Specialist tools. A job needs a mechanism, cavity count or size your toolroom doesn’t usually build, and learning on a customer’s tool is a risk.
• Maintenance and repair backlog. New tools take priority, and planned maintenance slips until a tool fails on the press. Outsourcing modifications or refurbishment can free your own toolmakers for the urgent work.
• Transferred tools. A customer moves tools to you from another moulder, and they need assessment, repair or modification before they can run reliably.

In each case, the cost of saying no is usually higher than the cost of outsourcing. A late tool delays the customer’s launch, and a customer who has to look elsewhere for the tool may look elsewhere for the moulding too.

Where the Real Risks Lie

The worry about outsourcing toolmaking is rarely about the toolmaker’s skill. It is about what happens to the relationship once someone else is involved. The risks fall into four areas.

• Direct customer contact. If the toolmaker deals with your customer directly, even for something as routine as a design query, the customer learns who is really building their tool. Next time, they may go straight to the toolmaker and then look for a cheaper moulder.
• Part data and IP. You will share CAD models, drawings and sometimes the customer’s specifications. Without a clear agreement on confidentiality and use, that data is out of your control.
• Quality and consistency. A tool built to a different standard from your own will behave differently on your presses. If it underperforms, the customer blames you, not the toolmaker.
• Tool ownership and paperwork. Tool marking, ownership plates, invoices and documentation can all name the toolmaker. Any of them can reach the customer if no one has agreed otherwise.

One further question is worth asking any toolmaker plainly: do you, or does a business connected to you, also mould parts? If the answer is yes, that is not automatically a problem, but you need to know, and the safeguards in the next section matter even more.

How to Protect the Customer Relationship

The safeguards are straightforward, and a toolmaker who works with moulders regularly should offer them without being asked.

• You are the only point of contact. All communication runs through you. The toolmaker raises design queries, DFM suggestions and progress updates with you, and you decide what goes to the customer and how.
• A non-disclosure and non-solicitation agreement. The NDA covers the part data and drawings. The non-solicitation clause commits the toolmaker not to approach your customer for that work, or for moulding, for an agreed period. Put it in writing before any data is shared.
• Unbranded documentation. Tool drawings, DFM reports, sample inspection reports and tool manuals should carry your name, or no name, rather than the toolmaker’s.
• Agreed tool marking. Decide upfront what goes on the tool’s ownership plate and whether the toolmaker’s mark appears anywhere on the steel.
• Delivery to you, not the customer. The finished tool comes to your site for sampling and approval, so the customer sees it arrive from you.

None of this needs to be complicated. A short agreement and a clear brief at the start avoid awkward conversations later.

Keeping Quality Consistent with Your Own Tools

A tool built outside should run on your presses like one built in your own toolroom. That only happens if the toolmaker works to your standards rather than theirs.

Share your tool standard at the start. Most moulders have preferences, written or not, on:

• Mould bases and components, including preferred suppliers and standard parts
• Tool steels for cavities, cores and inserts, matched to the expected volumes
• Hot runner systems and controllers, so tools are compatible with the equipment you already run
• Cooling, water connections and ejection, laid out to suit your press set-ups and change-over routines
• Press compatibility, including platen size, tie-bar spacing, locating ring and clamp arrangement for the machine the tool will run on

Agree how sampling and approval will work before the tool is built. Decide where the first trials happen, what the toolmaker must deliver with the tool (sample parts, inspection reports, a spares list, drawings), and what counts as acceptance. If you sample on your own presses, agree how quickly the toolmaker will turn round any modifications.

What to Agree Before the First Tool

Use this as a checklist with any new toolmaking partner:

• NDA and non-solicitation agreement signed, covering your customer and the agreed period
• You named as the sole point of contact, with no direct customer communication
• Your tool standard shared: mould bases, steels, hot runners, cooling and ejection
• Target press and its specification confirmed
• Documentation format agreed: your branding or none
• Tool marking and ownership plate agreed
• Sampling location, deliverables and acceptance criteria agreed
• Turnaround for post-sampling modifications agreed
• Lead time, payment stages and what happens if the customer changes the design mid-build
• Whether the toolmaker, or any connected business, also moulds parts

If a toolmaker is reluctant to agree any of these, treat that as useful information.

Overflow Toolmaking with Alliance Tooling

Alliance Tooling designs, builds, modifies and maintains injection moulds here in the UK, and works with moulders as an overflow and subcontract toolroom.

They work behind you, not alongside you: you stay the only point of contact, the company signs a non-disclosure and non-solicitation agreement before any data changes hands, and documentation goes out under your name.

If your toolroom is full, or you need a tool built, modified or refurbished, send Alliance Tooling the details and they will come back with a lead time and quote.

Read more news from Alliance Tooling here.

Alliance Tooling
+44(0)116 275 0584
Website
Email