O-Ring across a parting line - plastic molded part
O-Ring across a parting line - plastic molded part
(OP)
I have seen a number of plastic molded parts that feature a parting line crossing a radial o-ring groove and that are intended to seal against at least 100's of psi.
Does anyone have any experience specifying plastic molded parts with features like these?
How do you specify the size of the parting line? Ra? Rz? mm?
Likewise what equipment do you use to measure against your specification?
How many rejects have you observed after manufacturing has started? (ie parting line grows larger with time due to tool wear)
Really interested to hear peoples feedback on the success of these features.
Does anyone have any experience specifying plastic molded parts with features like these?
How do you specify the size of the parting line? Ra? Rz? mm?
Likewise what equipment do you use to measure against your specification?
How many rejects have you observed after manufacturing has started? (ie parting line grows larger with time due to tool wear)
Really interested to hear peoples feedback on the success of these features.





RE: O-Ring across a parting line - plastic molded part
RE: O-Ring across a parting line - plastic molded part
Regardless, in the applications I have observed this questionable practice of parting lines crossing o-ring glands, the application calls for extended durations at <100psi.
RE: O-Ring across a parting line - plastic molded part
RE: O-Ring across a parting line - plastic molded part
RE: O-Ring across a parting line - plastic molded part
What equipment would you use to measure a parting lines size in a QA/production environment? (assuming your not going to cut up a sample from each production run?)
RE: O-Ring across a parting line - plastic molded part
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: O-Ring across a parting line - plastic molded part
What kind of instrumentation do you use to measure the 0.002" in QA?
RE: O-Ring across a parting line - plastic molded part
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: O-Ring across a parting line - plastic molded part
----------------------------------------
The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.