SC+production+of+Chocolate+&+bubble+gum

Actually i not very understand by unit operations involved which written in the question, but i try to answer.If wrong please correct me. unit operations mean the instrument involved in production.ist correct? The principle involve in the production. In the video of how is chocolate made, (a)mold:to get the desirable shape of chocolate. (b)boiling unit and mix :boil 1500kg chocolate in 12 hours with 40 degree centigrade (c)filling:the liquid chocolate is filleddirectly into the mold.This particular mechine produce 400 hearts per min and take 20min to set. (d)unmolding point:mold turn over and the rod flap to allow the chocolate to fall without being broken and empty mold turn to starting point. (e)cooling and hardening (f)packaging:depend on customer rhelogical properties and flow behavior of the material during the processing important because the chocolate can set in a specified time after filling into mold and can retain its shape in a certain minute.Especially in the last part of the video the bear with bow tie,after putting the red color decoration liquid to the mold,the liquid have certain viscosity so that it wont be affected by the filling of liquid chocolate on it. Now i only know how bubble gum made from plastic, rubber, colour and flavouring (ist i hear wrong??).Plastic and rubber can be eaten??Gum base? After that add glucose syrup as sweetener to help the gum base soft. Next add dextrose. Then,mix,squeeze, cooling and packaging. The rheology properties of the bubble gum should be control because after the squeezing process the bubble gum must have certain viscosity to maintain its shape to avoid it flow