powder layer
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Posted by: josey.mathew ® 07/12/2007, 08:36:45 Author Profile eMail author Edit

I want to build a machine which will deposit a fine layer of a powder on a A4 sized platform. Any ideas ?

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Re: powder layer
Re: powder layer -- josey.mathew	Post Reply	Top of thread	Forum

Posted by: jboggs ® 07/12/2007, 12:07:27 Author Profile eMail author Edit

I designed a machine once that did just that. It deposited a thin film of powder on sheet glass to keep them separated when stacked. Based it on the premise of an old flour sifter from your mom's kitchen, a scraper on a screen. Be prepared for some "prototype development" time and expense. Might not work at all in your case.

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powder layer
Re: Re: powder layer -- jboggs	Post Reply	Top of thread	Forum

Posted by: josey.mathew ® 07/12/2007, 21:25:08 Author Profile eMail author Edit

hi so could you jus elaborate ?? how about showing me some picture ?

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Re: powder layer
Re: powder layer -- josey.mathew	Post Reply	Top of thread	Forum

Posted by: jboggs ® 07/13/2007, 10:00:14 Author Profile eMail author Edit

I have no pictures or drawings. Project was probably 20 years ago. Are you familiar with a flour sifter, the common kitchen tool? Its just a sheet metal cylinder (axis vertical) with a spherical shaped wire screen mounted just above the bottom. An external crank is connected to a curved wire rod inside the screen. Flour is poured in from the top and rests on the screen. As the crank rotates, the wire rod rubs across the inside of the screen and disrupts the flour enough that a semi-regulated flow of flour through the screen results. My design was a much larger scale. The screen was cylindrical rather than spherical, and used rubber squeegees on a horizontal rotating shaft rather than wire rods. It dispensed powder on glass sheets as they traveled underneath on a conveyor. The rate could be controlled with the speed of the squeegees.

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powder layer
Re: Re: powder layer -- jboggs	Post Reply	Top of thread	Forum

Posted by: josey.mathew ® 07/13/2007, 11:20:24 Author Profile eMail author Edit

but i dont think i can get a fine layer of the powder it will be quite uneven

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