Homemade Miniature-compressor

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Introduction: Homemade Miniature-compressor

Hello, this is a project I've been working at, it's a miniature reciprocating compressor made out of some cooper pipes as cylinders and connecting rods made of acrylic. I used epoxic glue for casting the pistons and a 9 volt drill and an abrasive file to machine them. A good way to cast the pistons can be found here

https://www.instructables.com/id/SWGD4M3FABRWWS9/

Crankshaft is made with a pulley and other parts of an old cassete player, and motor was taken from a broken 3 volt electric screwdriver
As me, you can get the one way valves from coffee bags, which aren't hard to find but it's pretty hard to prepare and drink all the coffee to get them empty ( because of this, maybe you will get some non sleeping nights) .
I still have to get two more check valves for finishing this project , but two were enough for building a big part of the compressor. The reason why I need four check valves is explained in the scheme. I hope in next months I get the parts needed, so i can finally present you this thing finished.

This was my first instructable (well, actually my first slideshow), so please comment.

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14 Comments

really cool, but what did you use to make the pistons?

i used epoxic glue (like the one on the photo)

using what process? (i.e. molding them or making a chunk and carving it out,etc.)

what do you mean by carving it with a lime and sand paper

I meant abrading the piston so it can fit inside the copper pipe. Unfortunately I disassembled the project so I won't be able to upload new photos or videos of this project.
Anyway, I built another one that uses a single, bigger piston. I'll try to upload some photos and a video of it working.

user

how many psi/bar can u get with that ?? nice work

user

mmm, u cand put a pipe connected to a bottle or smth with a measurer, like the ones in the air compressors,

I still don´t know, i've already got the coffee valves but unfortunately i haven't got time to finish it. Also I don't have a way to measure the air pressure (any ideas??).

How do you get the one way valve from coffee bags