3D printing
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PositronicRay

Original Poster:

29,065 posts

214 months

Sunday 20th March 2016
quotequote all
Just a thought.

I have a small automotive 12v coolant circulation pump. The plastic end cap has hairline cracks in it, a new pump is circa £250. A perfect job for a 3d printer, right?

Where would I go to find someone who can produce me a part, accurately & economically so I can repair the pump?

Or is just pie in sky for another few years?

GroundEffect

13,864 posts

187 months

Sunday 20th March 2016
quotequote all
You can probably find a replacement volute anyway...who makes the pump? Bosch? Eberspacher?

PositronicRay

Original Poster:

29,065 posts

214 months

Sunday 20th March 2016
quotequote all
No idea of maker, it's a Mercedes part, all I have is a part number. I've tried Yoyo parts, no alternative manufacturers show up.

anonymous-user

85 months

Sunday 20th March 2016
quotequote all
Totally do-able. No problems at all. But you will either need to create a cad drawing of the part or pay someone to do that.

I am not sure an extruded part would be good enough, so you might need to go down an SLS type system (laser sintered powder). I would imagine that all in, it might cost up to £100 if you paid commercial rate on all the steps required if you went sintered.

If you found someone (a hobby type person) with a filament printer (extruder type), they might take it on for beer money.

Evoluzione

10,345 posts

274 months

Sunday 20th March 2016
quotequote all
Depends what it looks like, but 'plastic end cap' sounds like something someone with a simple lathe will knock out for £20....

PositronicRay

Original Poster:

29,065 posts

214 months

Sunday 20th March 2016
quotequote all
Evoluzione said:
Depends what it looks like, but 'plastic end cap' sounds like something someone with a simple lathe will knock out for £20....
End cap is the wrong description. 2nd poster guessed right it's a volute, not really doable on a lathe.

PositronicRay

Original Poster:

29,065 posts

214 months

Sunday 20th March 2016
quotequote all
Skodasupercar said:
Totally do-able. No problems at all. But you will either need to create a cad drawing of the part or pay someone to do that.

I am not sure an extruded part would be good enough, so you might need to go down an SLS type system (laser sintered powder). I would imagine that all in, it might cost up to £100 if you paid commercial rate on all the steps required if you went sintered.

If you found someone (a hobby type person) with a filament printer (extruder type), they might take it on for beer money.
Sounds interesting. I'm in Warwickshire, anyone know who I might talk to?

Impasse

15,099 posts

272 months

Sunday 20th March 2016
quotequote all
My daughter has played around with these things at university. Find yourself a student.

PositronicRay

Original Poster:

29,065 posts

214 months

Sunday 20th March 2016
quotequote all
Impasse said:
My daughter has played around with these things at university. Find yourself a student.
Warwick university are big on engineering and local, racking my brain for contacts.

GroundEffect

13,864 posts

187 months

Sunday 20th March 2016
quotequote all
Your problem is going to be getting the appropriate material for the purpose. I used to design cooling systems for engines - typically max temp 120C with peak pressures of 180kPa. To combat those you'll need and engineering plastic and I'm not up to date enough on additive manufacturing (the real name of 3D printing) to know what's available. Typical SLA is no use but SLS might be better. I made some prototype radiator end tanks out of poly carbonate but they could only run at ambient temps before cracking.


bucksmanuk

2,426 posts

201 months

Monday 21st March 2016
quotequote all
Or find yourself a mechanical engineer who has just bought one and will be setting it up in the next few weeks….wavey

BUT
Coolant pump for an engine?
100 °C?
3d printer?
Err no
Unless there’s some new materials on the market that I don’t know about.

PositronicRay

Original Poster:

29,065 posts

214 months

Monday 21st March 2016
quotequote all
bucksmanuk said:
Or find yourself a mechanical engineer who has just bought one and will be setting it up in the next few weeks….wavey

BUT
Coolant pump for an engine?
100 °C?
3d printer?
Err no
Unless there’s some new materials on the market that I don’t know about.
It's not the main engine pump, just a heater core recirculation pump, but a leak is still bad news. smile

It was just one of those random Sunday night "I wonder" thoughts.
I think the hassle, compromised reliability, awkward inaccessible position, make it a non-starter. The old pump managed 22yrs so a new one is in order. wink

bucksmanuk

2,426 posts

201 months

Monday 21st March 2016
quotequote all
Worry not..
It’s when people say “I wonder if…” is usually the time when good ideas are started….
22 years – I think it’s served you well….!

Tom_C76

1,923 posts

219 months

Tuesday 22nd March 2016
quotequote all
PositronicRay said:
It's not the main engine pump, just a heater core recirculation pump, but a leak is still bad news. smile

It was just one of those random Sunday night "I wonder" thoughts.
I think the hassle, compromised reliability, awkward inaccessible position, make it a non-starter. The old pump managed 22yrs so a new one is in order. wink
Sounds like covering the cracks with a blob of araldite putty would be worth a try.