12V Push Mechanism

[TonyMat]

I am in need of a 12V DC device that can push with at least 6 pounds of force.

Does anyone have ideas on the cheapest way to accomplish this?

Greatly appreciate any input.

 

[gruntguru]

It might be worth looking at central locking door actuators. High force, high speed, 12v and cheap at your local wrecking yard or on E-Bay. Probably need to drive it in both directions though. Link

je suis charlie

 

[IRstuff]

The converse of the advantage of solenoids is that a lead screw approach does not require power to keep it in place, i.e., if you want the pusher to maintain a physical position. Lead screw systems can be driven by steppers or servos. Unless you have some specific need for the stepper motor, a servo motor would more straightforward.

TTFN
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[Jboggs]

Tonymat, If I understand your application correctly it seems to be an ideal application for pneumatic actuators. You could use your 12v to drive a compressor long enough to pressurize a small tank. You place one valve (manual or solenoid) for each application point there at the tank. If you can run wires to the various application points you could just as easily run small air lines to those points. Then at each application point you place a small single-acting spring-return air cylinder. They would need only one air line for each. If your tank is at, say, 30-40 psi then cylinders as small as 1/2 inch bore could produce the force you need.
Several companies make miniature air cylinders and valves. The best known is probably Clippard (

http://www.clippard.com).

Call a customer service rep there. They'll help you figure it all out. And you can get 12V air compressors several places. The most common use is as backups for auto tire inflation.

 

[ScottyUK]

Motor, reduction gearbox, cam on the output shaft. If you're fussy, fit a cam follower to the spray can.

 

[TonyMat]

All you experts have been very, very helpful.

I have a lot of research to do from your suggestions.

I appreciate all your kind and thoughtful help.

 

[asimpson]

You may be able to use solenoid solenoid valve in place of existing plunger valve. Mechanically fix plunger in perminantly on state and plumb paint out through solenoid valve which will now control flow of paint.

Advantage would be to avoid mechanical issues of matching actuation to plunger valve movement. Solenoid valve can use power of pressurised paint to seal valve and low power coil can be used.

Ploblems would be getting valve suitable paint medium. Needs a bit of research

http://www.alibaba.com/product-detail/Brass-material-black-spray-paint-12v_60187432507.html

 

[Tmoose]

https://www.youtube.com/watch?v=b85HCT4id6I