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Noob from overseas need advice about printing for car parts

Posted by Delifisek 
Noob from overseas need advice about printing for car parts
April 06, 2014 02:45PM
Greetings,

I planning to purchase a RepRap kit.

My main goal build parts for my car.

I had old car, finding some parts are impossible. As a linux guy (from mid 90's) I try to hack my car and go with fiberglass. however it needs much expertise. Then I realize I can print them with reprap. However I want to clear some questions.

One of my goal is print a special carburetor hat, which sits top of the engine



(My design was bit complicated than this and imposibble to build with simple welding)

Is ABS material can handle the typical engine heat ?

Also I may sell these hats to my friends or enthusias.

Is there any way to calculate approximately material cost and print time of the

160 mm x 120 mm x 80 mm, box shaped object with 5mm wall thickness.

Also I'm planning to buy from Diy Tech Shop LLC, is there any suggestion about this selection?

My Best Regards.
A2
Re: Noob from overseas need advice about printing for car parts
April 06, 2014 03:19PM
Quote
Delifisek
typical engine heat ?

Volatile fumes, hot/shorted electrical wires, radiant heat from the exhaust, and heads, gas, and oil leaks can contribute to a failed device, and fire.
If the engine back fires out the carburetor you got a fire.
You're taking on a lot of liability selling some thing not validated by a qualified person or organization.
There are safety standards that also have to be met.
Re: Noob from overseas need advice about printing for car parts
April 06, 2014 03:42PM
Thank you for replying.

So is ABS material different than this material


A2
Re: Noob from overseas need advice about printing for car parts
April 06, 2014 03:58PM
Automotive resins are engineered, and tested for a specific application.
There are fillers added to the resin to help qualify a resin for a specific application.
Just because a plastic parts has an ABS designation doesn't mean it's unadulterated.

You would have to carry out some reverse engineering tests to figure out the performance,
and mechanical attributes of the plastic that you plan to replace.

Your picture looks like an air intake box, and not a cover to a carburetor, but flames could blow back into the box from the carburetor.

You are the designer, engineer, manufacturer, quality control, and regulatory personnel, it's your baby, and you'll have to figure it out.

I don't think it would be wise for anyone to make a material recommendation.
Re: Noob from overseas need advice about printing for car parts
April 06, 2014 05:09PM
Well, I did not consider the back fire. Especially gasoline backfire.

This was exact one to I try to replace.




Also, in our country almost all old cars (which we targeting) uses lpg. Also our hat especially for LPG usage. In our usage gasoline usage was rare (only when whicle out of lpg).

However, I believe we have to have consider a gasoline back fire, take counter measures. I thank you for warning me. I newer tought it (just because I almost forgot last time I use gasoline (probably 4 years ago))

Anyway, My orginal question was engine heat and abs, If I print that hat, can ABS withstand typical car engine heat. At least I have to have test my prototype before the molding.

Also there where printing time and material costs.

My Best Regards
Re: Noob from overseas need advice about printing for car parts
April 07, 2014 07:54AM
3d printing ABS already gets soft at around 110-150C and gets extruded at 200-250C.
The reccomended Temperature range for normal ABS is from -35 to +85C

If it comes into contact with temperatures higher than that you are in trouble.
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