[SS-Propellant] casting vibrator

[william colburn]

Interesting idea. The usual practice in propellant
manufacture is to us a pneumatic vibrator. Vacuum
casting would probably produce better results.

Vibration is used to induce propellant to flow when it
is extrememly viscous. 

BC

--- Mateica Vlad <d3xt3rjr at yahoo.com> wrote:

> 
> 
> Rich Nakka <richnakka at rogers.com> wrote:
>   Gents,
> While in the process of organizing a stack of
> technical notes & correspondences, I came across
> something of interest. In correspondence with a
> fellow rocketeer in Denmark some years ago, he told
> me about a vibrator that he used to aid casting of
> propellants, which was apparently very effective in
> helping the slurry to flow and fill all spaces in
> the mould.
> 3.0 kW motor
> Eccentric flywheel to produce a 25 Hz vibration
> Vibration amplitude 2.3 mm.
> 
> Something to consider for our casting of those large
> 34 kg segments. This may help in maximizing our
> propellant density?
> 
> Richard
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>    
>   Interesting ideea Richard. For some good results
> we need to calculate the excentric
> dimensions(diameter, mass) and to make a controlled
> temperature curing oven. In this way we can cast the
> propellant segment, put it into the oven(where is
> the vibrator) and slowly cool the oven so that the
> density well be maximized. we can't cast the
> propellant into the vibrating mold. the oven can be
> made simple with a termostat and a heating coil. the
> electronic schematic for the termostat cand be
> provided by Prodan Paul from the safty team(he is
> making a termostat right now for me to easy my
> casting procedure) 
>   Vlad
>   
> 
> 
> 		
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