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The parting line must occur along the line round the position of maximum dimension when viewed in the draw direction.[pye] Many applications (seals, tight running molded parts) that require precision for shape control, call for removal of flashes. Secondary operations are thus employed, in addition to high precision molding dies to remove these flashes. Many molders will repair or even replace the mold tooling so that the flash is reduced to an acceptable tolerance or eliminated altogether. Secondary operations to remove parting line flash include hand trimming, vibratory tumbling, media blasting and cryogenic deflashing.[1]

Flashes are known to improve sealing between mating faces in some instances (Fuel tank seals, hydraulic power steering gear, etc.), and thus flashes are permitted to some extent in special cases.

In engineering drawing, parting line is often abbrivated as PL. ASME's Y14.8 standard specifies a symbol for parting line.[2]

References[edit]



Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Parting_line — Please support Wikipedia.
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438 news items

 
Hackaday
Tue, 09 Feb 2016 10:01:42 -0800

I decided that the edges of the buttons would be the most easily repaired of defects so I picked that as the parting line for my two part mold. I then layered the bottom of my mold with Plasticine clay. My clay is terribly hard, so I put it in a ...

cleveland.com

cleveland.com
Sun, 31 Jan 2016 19:00:00 -0800

And then there's Tom parting line about Mary taking over the estate. "Long live our own Queen Mary." And what would an episode be without some zingers from the Dowager, this time to disgraced Denker. "You've read too many novels Denker, you've seen ...

TIME

TIME
Thu, 14 Jan 2016 10:11:15 -0800

The heart-wrenching moment when Rhett Butler, played by Clark Gable, turns to Scarlett O'Hara, played by Vivien Leigh, and delivers his famous parting line is what comes to mind for many when the Best Picture winner is mentioned. But what if the roles ...

Bustle

Bustle
Mon, 25 Jan 2016 15:15:00 -0800

The parting line is pre-empted by Baby Edward Furlong telling the Terminator that he can't say "affirmative" and has to inject some cool ass one-liners into his arsenal, so that and the robotic delivery makes me think it's meant for lolz. So I hope you ...
 
TVGrapevine.com
Wed, 03 Feb 2016 16:45:00 -0800

A parting line from me would to tell everyone to never stop chasing their dream. It sounds incredibly cliche, but it's true! If you feel in your heart that you want to do something, then do it! Do whatever it takes, but don't ever give up on that dream ...

NETCOMPOSITES

NETCOMPOSITES
Tue, 26 Jan 2016 05:13:46 -0800

The core is then mounted with the backing using a mould parting line (core support). The face casting layer is cast via the sprue point, which should be sited at the deepest part of the cavity. The face casting layer acts as the effective surface and ...

The Interrobang

The Interrobang
Mon, 18 Jan 2016 21:54:59 -0800

Roman Harper, player for the Carolina Panthers. went to Instagram to show how on one play, while defending Marshawn Lynch, Lynch broke Harper's helmet. Unfortunately, broken helmets don't affect the box score otherwise the Seahawks would be on their ...

Hindustan Times

Hindustan Times
Sun, 24 Jan 2016 23:30:00 -0800

Not done with the compliments yet, his parting line to Naazneen was 'How come there is so much of an age difference between your husband and you?' “Chal Baba. You have an early morning flag off,” I said, realising that he was in a mood to spare none.
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