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A parting line, or seam in moldmaking is the place where two or more parts of the mold meet.[1] Parting lines occur due to minute inherent gaps between two mating faces of halves of the die. The material filling into these gaps is generally called molding flash or simply flashing. Parting lines generally show up as a raised line around the product (witness mark) on commodity products such as toys.

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.[2]

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.[3]

References[edit]



Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Parting_line — Please support Wikipedia.
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233848 videos foundNext > 

Updated - Mold Making Casting Complex Parts w/ parting line)

When mass casting a part without a flat side, you must create a two-part mold. We create a two-part silicone rubber mold with a clean parting line and then cast the part with Repro.

SOLIDWORKS - Mold Tools Part 2 - Split Line and Parting Line

Learn how to use mold tools for SOLIDWORKS from this 3 part series. This video describes how to create split lines and parting lines in preparation to creating parting surfaces. Quick Tip...

How to mold a pattern with two parting lines

Mold Making with Silicone: 2 piece mold with alginate parting line

Here's a novel mold process for those of you making 2 piece molds. This process delivers great, tight seams. Platsil 7325 is a great silicone to use for this molding process since it is VERY...

E5 SolidWorks Non-planar parting line mold

Exercise 5 - Explores SolidWorks Mold tools when used with a non-planar parting line.

SolidWorks 2013 Tutorial | Parting Line Draft

Want all of our free SolidWorks videos? Download our free iPad app at http://itunes.apple.com/us/app/video-training-courses-from/id418130423?mt=8 More details on this DS SolidWorks 2013 training...

E7 SolidWorks finding a complex parting line

Exercise 7 - Explores how to create a silhouette parting line off a complex (non-planar) part.

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Ideal for smaller projects (less than 12" x 12"), this is the easiest process for creating parts, patterns, tools, & molds. We demonstrate creating a silicone rubber mold and then the casting...

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FOUNDRY WORK molding irregular parting line Part 6 video A tubalcain

Tubalcain shows how to make sand mold using a pattern with an irregular parting line. This is part A of a two part video. irregular parting part 6 video A.

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316 news items

Entertainment Weekly (blog)

Entertainment Weekly (blog)
Mon, 02 Mar 2015 06:21:46 -0800

She's a nurturing big sister who leads by example, and at going-on-17 years old, she's pretty cool about the fact that the highlight of her social life is an expensive puppet show. But then again, Rolfe. Parting line: “I'd like to stay and taste my ...
 
Hawke's Bay Today
Fri, 27 Mar 2015 14:22:30 -0700

I've spoken to many a visitor and "hey, nice talking to you", is often the parting line from them. I think they enjoy having a chat with the locals to not only learn more about the lie of the land, but also to just simply chat. Because the conversation ...

Design ENGINEERING

Design ENGINEERING
Sun, 24 Aug 2014 22:31:12 -0700

First of all, the location of the parting line determines the direction of mold opening and, consequently, the direction in which features must be drafted for easy ejection. Second, it affects where any vestiges left by the mating surfaces of the mold ...

New York Times (blog)

New York Times (blog)
Sun, 08 Mar 2015 18:32:03 -0700

Elijah (Andrew Rannells) clocked him way back in Season 1, with his memorable parting line after coming out to Hannah: “Nice to see you, your dad is gay.” That episode first introduced us to Elijah, who had been Hannah's boyfriend in college but later ...
 
Kayak & Canoe News
Wed, 18 Mar 2015 13:28:43 -0700

A new river running creekboat hybrid from the leading whitewater manufacturer aims at delivering on the Urban Dictionary definition of its serene name. Jackson Kayak's new Zen aims to allow paddlers to attain a “state of calmness and confidence on the ...

Mid-Day

Mid-Day
Fri, 20 Mar 2015 19:58:04 -0700

Aabaar dekha hobey (We will meet again, the standard parting line) is rarely heard. Instead, Bengalis now say, “Pheer milengey”, gratuitously adding, “Theek hai”. There's a strange, inexplicable collective rejection of Bangla culture and identity ...

NBCSports.com

NBCSports.com
Wed, 31 Dec 2014 07:33:04 -0800

First, it was the West Coast offense. Now, it's the “mutual parting” in lieu of termination. Yes, the 49ers are still setting trends in the NFL. On Wednesday, Washington announced that the team and defensive coordinator Jim Haslett “mutually agree to ...

ESPN

ESPN
Fri, 13 Feb 2015 18:26:27 -0800

And how many times did Jed York keep relying on his "mutual parting" line when questioned on the move? Not surprising the 49ers front office has been "unavailable" for comment. Reply · Like. · 8 · February 14 at 12:57pm. Levi L Peebles · Top Commenter.
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