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Home > Forums > Engineering Forums by Industry > Plastics Engineering > -Plastics Engineering Forum

self degating gates in split molds.

Read More Threads Like This One

klank (Mechanical)

15 May 12 9:34

Hello everyone.

is anyone familiar with a method of making a self degating gate (and runner) in a two-cavity split mold?

patprimmer (Publican)

15 May 12 10:01

It's called a submarine gate.

Regards
Pat
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klank (Mechanical)

15 May 12 10:05

yes.
I was thinking of either a submarine gate, a tunnel gate or so.
But i don't know how to place it between the splits, so that it will degate when the part etc. is ejected like it does in a normal two plate mold.
if someone could provide a picture of an example to do this, i would be very happy.

ornerynorsk (Industrial)

15 May 12 12:48

A sub gate does not enter the cavity on the parting line. There are numerous examples and diagrams on the internet. See page 15 of this guide.
This guide is specific to acetal, but some general principles cross over to be applied elsewhere.

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

http://www2.dupont.com/Plastics/en_US/assets/downloads/processing/DELRIN_Mo

patprimmer (Publican)

15 May 12 20:17

As ornerynorsk has indicated this information is available through raw materials suppliers data.

Most reputable suppliers have similar publications. Also any text book on mould design will have it.

If you have to work with plastics at a design or troubleshooting level, get all the raw materials manufacturers publications you can and read them through.

Regards
Pat
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