Designing for MouldingThe geometry rules that come from how plastic flows, packs and shrinks.Mechanical EngineeringAlmost every moulding defect traces back to uneven wall thickness.DoKeep the wall thickness uniformPut 1 to 2 degrees of draft on every faceSize ribs at 0.5 to 0.6 of the wallRadius every internal cornerGate into the thickest sectionAvoidThick sections: they sink and voidSharp corners: they concentrate stressUndercuts: they need side actionsBosses joined straight onto a wallText or logos across a parting lineShrinkage runs from about half a per cent for filled grades to two percent or more for unfilled polyolefins.Designing for Mouldinglearnposters.com
Designing for Moulding — printable engineering wall chart from LearnPosters. Free vector PDF, US Letter and A4.

What’s on the Designing for Moulding poster

10 entries in 2 groups.

Almost every moulding defect traces back to uneven wall thickness.

Shrinkage runs from about half a per cent for filled grades to two per cent or more for unfilled polyolefins.

Questions about the Designing for Moulding poster

What’s on the Designing for Moulding poster?
10 entries in 2 groups. Almost every moulding defect traces back to uneven wall thickness. Do: Keep the wall thickness uniform, Put 1 to 2 degrees of draft on every face, Size…; Avoid: Thick sections: they sink and void, Sharp corners: they concentrate stress, Un…. Shrinkage runs from about half a per cent for filled grades to two per cent or more for unfilled polyolefins.
Who is the Designing for Moulding poster for?
Designing for Moulding belongs to the Mechanical Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning manufacturing can pin it up — a beginner, a student mid-course, or someone revising years later.
When should you use the Designing for Moulding poster?
Designing any injection moulded part, before the tool is quoted. A wall chart earns its place by being glanceable from where the work is happening, so Designing for Moulding belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
What other posters go with Designing for Moulding?
Additive Processes, Casting Processes and Speed & Feed sit alongside Designing for Moulding in the Mechanical Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Additive ProcessesCasting ProcessesSpeed & Feed
Is the Designing for Moulding poster free to download and print?
Yes. Designing for Moulding downloads as a free PDF with no account, no email and no watermark, like everything else in the Mechanical Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Designing for Moulding poster print at?
Designing for Moulding is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Designing for Moulding loses nothing.Printing guide

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Charts that sit alongside Designing for Moulding on the same wall.

Browse every Mechanical Engineering poster, or start from the full catalogue.