Dimension control of Plastic parts
Dimension control of Plastic parts
(OP)
Hi,
We have a plastic housing design in which both the halves when assembled together, the max, mismatch( shift) on the mating edges should ne .01 inches. Please help me how to specify this on the part drawings of each parts?
Thanks in advance for your suggestions
We have a plastic housing design in which both the halves when assembled together, the max, mismatch( shift) on the mating edges should ne .01 inches. Please help me how to specify this on the part drawings of each parts?
Thanks in advance for your suggestions





RE: Dimension control of Plastic parts
And profile often references datums -- that is the tricky part on plastics. Are you merely interested in controlling shape and size, such that they fit together? Or might the outline of the mating edge need to be tied back to other features?
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Dimension control of Plastic parts
However, for some plastics processes, especially larger parts, .010 is pretty tight, so are you sure it's possible with your process?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Dimension control of Plastic parts
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: Dimension control of Plastic parts
SeasonLee
RE: Dimension control of Plastic parts
The only way I know of maintaining your requirements is to either use a .010 profile tolerance or a +/-.005 dimensional tolerance. The profile tolerance would probably be the better choice.
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Dimension control of Plastic parts
The mismatch is for two halves of a mold as I recal - not for mating parts in an assy.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Dimension control of Plastic parts
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: Dimension control of Plastic parts
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com