Microwave oven - rubber extrusion 1

[Elastomatt]

Has anyone got some good resource for understanding the working of a microwave oven on an extrusion line? 6 Magnetrons with a belt that is 200mm wide (approx). Rubber is cured through the ovens.
I am going to post this on the microwave section as well....

Thanks in advance

 

[Skogsgurra]

Keep your posts in one forum. Double posting only creates confusion.

Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.

 

[Elastomatt]

Ok, then I will keep it in here!! I posted in rubber because that is the material and in microwave because of the equipment...seemed logical to me.

Thanks

 

[Higgler]

Microwave ovens in general vibrate molecules that cause friction and therefor heating.
The microwave ovens can also be considered simply as 3 parts, a signal generator, plus amplifier connected to one antenna with a box around it that's at least 2 wavelengths cubed. The signal generator and amplifier is effectively concentrated into a magnetron device for much lower cost.

Having the 6 Magnetrons side by side really is just like saying you made a box with six antennas inside next to each other. The box is for two reasons, safety for not heating up people and the energy radiated by the antennas hits the far side of the box, bounding backwards and usually making an uneven heating pattern. If you want a really even heating/drying pattern on your oven, that is doable, but takes a small amount of effort in placing vessels of water (or other items which can absorber the energy) in your oven at specific locations.

If you check inside all household microwave ovens you'll see one small rectangular piece of cardboard, about 2"x5" square. That hides and protects the antenna from getting food splattered on it. You can take that cardboard piece out of the holder if you want to see the antenna, which will be a pin with a round ball on the top, sitting in the center of a rectangular metal cup. Look up/google "waveguide to coax adapter" and you'll see something that looks like that antenna in your microwave oven.

I've used/modified a microwave oven to tap the energy from it using an internal antenna inside the oven, which brought the energy outside the oven with a coaxial cable, and into another antenna to heat items that were external to the oven. We heated a piece of boneless chicken with a concentrated beam from an elliptical reflector antenna and only cooked the center of the chicken and created a one inch diameter spot that was heated and cooked, while the rest of the chicken breast was uncooked.

 

[zappedagain]

Mmmm, tasty!