A cracked mold actually creates two different repair bills.
The first one shows up as an invoice; that repair quote you can read and authorize.
The second “bill” never gets itemized, but it shows up in the shots you didn’t run, the ship date you missed, the customer who started asking pointed questions in week three.
If your molder doesn’t build tools in-house, that second bill is where the bulk of the money →
All molders quote a high-volume injection mold transfer the same way:
If they can answer yes to all of these, it’s easy to determine your per-part price.
But that quote is a guess dressed up as a commitment.
The press was never the real question. The mold is.
And until someone pulls your original tooling file and compares it against →
Many buyers choose a custom injection molder the way they shop for printer paper.
Get three quotes: the lowest number, the shortest lead time. Done.
But then the tool ends up needing four revisions, your parts come back short, and the cheapest quote ends up being your most expensive.
Price and lead time are the two things a quote can obscure. The questions that really predict whether your program ships are the ones →
Ask three molders to define overmolding, and you might get three different answers. None of them wrong, exactly, but that’s the problem.
The terms overmolding and insert molding are used interchangeably across the industry, and no governing body has settled the issue.
That means when you go to spec your next part and say ‘overmolding,’ the shop on the other end might be hearing something entirely different.
Here’s how we make this call →
Most buyers ask for “standard tolerances” and assume that settles it. It doesn’t.
There’s no universal number that fits your part, only what the material, the geometry, and the tool will actually let you hold. Ask for standard, and you’ll get the widest band the process gives away.
The molding shops that don’t explain this up-front will be the same ones that hand you a bad first sample and a change order →
Many injection molding thread failures don’t start at the press.
Thread failures often begin with CAD – when an engineer designs a thread profile without first considering the ejection process.
The sequence of thread first, ejection second, is backward, and it’s where draft mistakes get baked in.
Screw-off cores (also called unscrewing cores) and side-action slides both handle threaded features, but they impose completely different draft requirements on the part.
Not just different angles. →
Most pre-tooling DFM reviews are checklists with engineering letterhead. They confirm the part can be molded without breaking the tool, and stop there. That’s not the question you needed answered.
A real review and a liability screen produce reports that look nearly identical — until 60,000 shots into production, when a weld line cracks through a structural zone nobody flagged.
The gap is specific, learnable, and directly observable. Here’s what rigorous looks →
Many quality teams treat PPAP submission as the paperwork that follows a successful FAI.
Get the part to print, run the first article, document it, submit.
Logical sequence. Wrong mental model.
FAI does confirm your part. However, PPAP is evaluated as a package by different reviewers against different criteria, with failure modes that differ from those for dimensional inspection.
You can submit a dimensionally perfect part and still get rejected three times, even if →
Most mold quotes are accurate, but they’re also missing the part that actually costs you money later.
Many buyers are still choosing mold manufacturers solely on the basis of the tool. They focus on the quoted steel, lead time, and whoever seems quickest on the phone.
That decision feels efficient upfront. It rarely is once production begins.
In 2026, the market is dividing into →
Drag marks don’t become expensive when they show up on parts. They become expensive when three vendors all stare at the same defect photo, but everyone claims it belongs to someone else.
We see this constantly with new tooling launches and transfer programs: the buyer leans on the molder because the molder shipped the parts, even when the real cause was built into the steel or the geometry months earlier.
Most cases →
H&H Molds, Inc.
119 S. Adams Rd.
Spokane Valley, WA 99216
Phone: 509-924-3770
Fax: 509-924-4174
