Making a part out of rubber

Pirateer guy · 2009-03-21T23:54:25+00:00

I need to make a part out of rubber. The part is obsolete and cannotbe purchased. I have one, but it has shrunk over the years and is nowloose and it leaks water. The part is an isolation ring for a boat engine mount. It sits betweentwo pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount andit also seals out the water. I am thinking that I can use the existing part to make a mold to builda new part out of urethane. I can add bulk to the existing part tomake up for the shrinkage. Problem is, all I can find on the web is urethane for making the moldnot the part. Does anyone have any insight into how I can do this?Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14,of 20 and it is Item Number 8. It is OMC part number 322214or OMC393162. same part.Thanks everyoneDan

Mar 21, 2009 22 Replies

Rate this thread:

Terry 17 years ago

I've not had a lot of experience with this but have made (hard) urethane parts using a silicone moldmaking material. Silicone is great because mold release normally is not needed; almost nothing sticks to silicone.

You might find that a moldmaking urethane can be used as a casting material. Though most moldmaking rubber is quite elastic to allow the pattern to be removed.

Bought my supplies from

formatting link

. They have a pretty wide variety and reasonable prices.

Best -- Terry

Vote

Lloyd E. Sponenburgh 17 years ago

Check MSC for Durathane-90 liquid. It's not a mould-making compound, it's for parts.

LLoyd

Vote

JR North 17 years ago

formatting link

the instructioal DVD. Everything you ever wanted to know, and all the supplies you need. JR Dweller in the cellar

-------------------------------------------------------------- Home Page:

formatting link

If you're not the lead dog, the view never changes Doubt yourself, and the real world will eat you alive The world doesn't revolve around you, it revolves around me No skeletons in the closet; just decomposing corpses

-------------------------------------------------------------- Dependence is Vulnerability:

-------------------------------------------------------------- "Open the Pod Bay Doors please, Hal" "I'm sorry, Dave, I'm afraid I can't do that.."

Vote

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required