Design and DFM review
Injection Mold Design and DFM Review
Find the problems while they are still lines on a drawing. A problem caught in a design review costs minutes to fix on paper and weeks to fix in hardened steel.
Sound familiar?
What we hear before the first call
- We are about to release a mold design for steel and want a second set of eyes.
- Our last tool needed rounds of corrections after the first trial.
- The part design keeps changing and I am not sure it will mold.
- We have a Moldflow report, but nobody to tell us what it means for the tool.
- Our mold builder says the design is fine. I want an independent opinion.
What it covers
DFM review
The part design checked against what the mold can actually make: draft, wall thickness, ribs, bosses, undercuts and shut-offs.
Preliminary mold design
Layout, gating, cooling, parting line and ejection reviewed early, while changes are still cheap.
Detailed mold design
Gating, cooling, ejection, actions and steel choices checked before the design is released.
Moldflow report review
Fill, pack, warp and cooling results read for what they mean on the press, and turned into specific changes.
Approval before cutting steel
A final, independent sign-off that every open item is closed before the first cut.
Bob's approach
How the work is done
- A free 15-minute call
To understand the part, the tool and the problem, and whether a review makes sense.
- A written scope and quote
You know what will be reviewed and what it will cost before any work starts.
- Review, markups and findings
Most reviews happen remotely. You share CAD, drawings or Moldflow reports and Bob marks them up.
- A follow-up call
Bob walks you and your mold builder through the findings, so the changes actually get made.
What you get
- Marked-up drawings or CAD showing each finding
- Clear, written findings you can hand to your mold builder
- Moldflow results translated into specific gating, venting and cooling changes
- A follow-up call with you and your mold builder
- A written summary of what was reviewed and approved before steel is cut
You work directly with Bob
45+ years of hands-on injection molding experience, and no stake in which mold builder you choose.
Case study
From Bob's own programs
In more detail
The services behind this page
Reviewing Preliminary Mold Designs
Early review of layout, gating, cooling and ejection while changes are still cheap.
Learn moreMold Design Reviews
Rigorous reviews that confirm the mold is production-ready and catch issues before they become costly mistakes.
Learn moreDFM (Design for Manufacturability) Reviews
A structured DFM review that prevents production issues and optimizes the part for molding.
Learn moreReviewing Mold Flow Reports
Interpreting Moldflow analysis to predict how material behaves during injection and what to change.
Learn moreApproving Mold Designs Before Cutting Steel
A final, independent sign-off before the most critical and expensive step in mold production.
Learn moreWhen should a mold design review happen?
After the detailed design is complete and before it is released for steel. An earlier preliminary review is also recommended for complex tools.
What is a DFM review?
A check of the part design against injection molding requirements, such as draft, wall thickness, ribs, bosses and undercuts, so the part molds reliably and at lower cost.
What files do you need?
Usually the part CAD, the preliminary mold layout (2D or 3D), and any Moldflow results available. Native or neutral formats both work.
Can the review be done remotely?
Yes. Design reviews, DFM and Moldflow report reviews are handled remotely by sharing CAD and reports.
Will you talk to my mold builder directly?
Yes. A follow-up call with your builder is part of every review.
Free 15-minute call
Have a tool on the drawing board?
Tell Bob what you're building. You'll get a straight answer on where the risk is and whether a review makes sense.