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A parting line 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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198481 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 c...

Castings: Parting Line & Draft

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How to make a parting line

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See how to create a parting line for plastic injection molds using the Solid Edge Mold Tooling application.

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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 creati...

SolidWorks 2013 Tutorial | Parting Line Draft

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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...

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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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Ideal for smaller projects (less than 12" x 12"), this is the easiest process for creating parts, patterns, tools, & molds. We demonstrate creating a silicon...

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proe creo mold cavity tutorial make parting line for cover plastic part made by: hoi hoang viet-mechvn.org.

198481 videos foundNext > 

16 news items

 
PR Web (press release)
Wed, 19 Mar 2014 20:01:12 -0700

The company will have on display numerous products from its product line including gibs, bushings, parting line locks and several from its newest steel line of wear strips. Share on Twitter Share on Facebook Share on Google+ Share on LinkedIn Email a ...
 
Arizona Daily Star
Tue, 08 Apr 2014 18:06:56 -0700

A dinner guest with long gray hair excuses himself from post-dessert conversation with a scandalous parting line jokingly delivered with one foot in the past and one in the present: "I'm not an advocate for this marriage. I tried to tell them not to ...
 
Washington Post
Mon, 07 Apr 2014 10:56:31 -0700

A dinner guest with long gray hair excuses himself from post-dessert conversation with a scandalous parting line jokingly delivered with one foot in the past and one in the present: “I'm not an advocate for this marriage. I tried to tell them not to ...
 
plastemart.com
Thu, 10 Apr 2014 01:26:15 -0700

Thus, the high precision of the calibration, coupled with the effective support of the mould carrier in the C-frame, ensure that the quality of the mould parting line is consistently high, especially in the critical neck area, even after many hours of ...
 
PR Web (press release)
Thu, 03 Apr 2014 11:00:00 -0700

Its high hardness makes it perfect for the manufacturing of plastic molds that require good parting line retention and sealing between colored resins. Special melting and forging practices result in 420 having a ultra-high microcleanliness and a ...
 
Philippine Information Agency
Tue, 01 Apr 2014 02:56:04 -0700

But I will come back before leaving office to insure a fully operational hospital,” Ona declared as a parting line in his brief speech, which he began by saying he felt a “very close kinship with Maasin.” Earlier, Gov. Mercado, in his welcome talk ...

ThomasNet News (press release)

ThomasNet News (press release)
Mon, 07 Apr 2014 05:22:30 -0700

Its high hardness makes it perfect for the manufacturing of plastic molds that require good parting line retention and sealing between colored resins. Special melting and forging practices result in 420 having a ultra-high microcleanliness and a ...

Telegraph.co.uk

Telegraph.co.uk
Sat, 29 Mar 2014 00:07:30 -0700

Her parting line was always the same: “Be a good boy.” It made not a jot of difference that I was now in my fifties. On this Mothering Sunday I remember her with fondness and gratitude, even if, on occasion, I may have fallen short in her expectations.
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