Destemmer is a machine used to separate the stems from the grapes to collect the juice from it. Destemmer is of three types, such as crusher-destemmer, destemmer-crusher, and destemmer-only. Destemmer works in three different types of functional areas, such as reception hoppers, rollers, and destemming. However, the aforementioned processes can either be performed in sequence or sometimes are not necessary. In the reception hopper, the grapes are dumped and the stems are separated and sent to the next stage. Separated grapes and stems are then get crushed into rollers. Rollers are available in different sizes, configurations, and materials. Destemming is the last process, consisting of the destemming basket or destemming cage, made up of steel and pierced. Then this destemming cage or basket spins and crushed the grapes.
The process of stemming involves removing the grape skins and the entire seed pod from the grapes. These are removed in one piece and are placed in the primary fermentation vat. After the cat has been filled with suds, the residue of the grape skins and seed is allowed to ferment for a sufficient period of time to allow the wine to properly age and mature. Good quality red wines are aged for between six months and a year depending on the variety. When the primary fermentation vat has emptied the sediments left behind will have to be mixed with the remaining grape juices to dilute their tastes. The process of mixing the sediments is referred to as dying and is achieved by pouring the grape juice mixture into another container.