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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 abbreviated as PL. ASME's Y14.8 standard specifies a symbol for parting line.[2]


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

Plastics Today

Plastics Today
Fri, 29 Apr 2016 10:03:45 -0700

Fiber optic sensors can also be used to scan the parting line of the mold in order to automatically detect stuck parts. But this method is limited to the detection of stuck parts that rise above the surface of the mold. It's not uncommon for parts to ...

Campaign US

Campaign US
Thu, 28 Apr 2016 01:46:33 -0700

Surround yourself with smart people, work as a team, remain aligned and walk away from all decisions with a parting line that everyone feels good about. Krispy-Kreme-hot-off-the-belt good. So whether it be the answer to why you've decided to pitch a ...

Machine Design

Machine Design
Thu, 21 Apr 2016 13:48:45 -0700

In many instances, the parting line and roughness are smoothed over in secondary machining processes, but this requires additional time and labor. Investment casting, on the other hand, uses ceramic molds that are hard. Finished parts exhibit smooth ...


Mon, 11 Apr 2016 06:57:11 -0700

There are two ways to wear them: either as a tiny braid plaited right through the parting line, or as a raised 'unicorn' style, which sits right down the centre parting. Take a look at the stars who have rocked them and grab a friend who's good at hair ...


Wed, 13 Apr 2016 15:38:11 -0700

Almost every one of the questions Mayor Bill de Blasio was asked during a crowded media availability today seemed to a question he didn't want to answer. His parting line pretty much summed it up. “Thank you everyone. Glad we focused on the important ...

Sports Illustrated

Sports Illustrated
Wed, 06 Apr 2016 00:28:04 -0700

His parting line: “Y'all better be looking at the sideline tonight and thinking, 'If Mike and [Oregon State's] Scott [Rueck] and [Syracuse's] Quentin [Hillsman] can get their teams to the Final Four, we can go, too.'” Neighbors's argument for that ...

The New Indian Express

The New Indian Express
Tue, 19 Apr 2016 12:52:30 -0700

Director Gokul of Itharkkuthaane Aasaipattai Balakumara (2013) fame seems to be swiftly and silently completing his much awaited film Kashmora, featuring Karthi, Nayanthara and Sri Divya in the lead. Sources say that the director has been working non ...
Times of India
Mon, 18 Apr 2016 10:03:45 -0700

BAREILLY: Two brothers dealing in wholesale sugar and ghee business in Milak tehsil of Rampur district have learned that it is not easy to fool the police. They have landed in a soup for cooking up a story of being looted in order to avoid returning ...

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