Device and method for the preparation of recyclable thermoplastic plastic material

An apparatus for the preparation of thermoplastic plastics material to be recycled, comprising:

• a first, upstream treatment stage for the material and a second, downstream treatment stage for the material, wherein the stages are disposed in series along a direction of flow of material;
• wherein the first stage comprises at least two first stage receiving containers configured to operate in parallel;
• wherein the second stage comprises at least one second stage receiving container, connected in series to the first stage;
• wherein each receiving container is configured for the material to be introduced thereto from above, wherein each receiving container comprises:
• rotating tools disposed in the container and configured to heat and mix the material;
• and
• a discharge member configured to discharge the material from the container;
• a device for alternating batch-wise feeding of the second stage receiving container from the first stage receiving containers;
• and
• a channel into which the discharge member of each receiving container of the first stage leads, wherein the channel comprises a shut-off member provided therein for each receiving container of the first stage, wherein the shut-off member is configured to move between:
• an open position, at which the respective receiving container of the first stage is in fluid communication with the second stage receiving container, and
• a closed position, at which the respective receiving container of the first stage is sufficiently fluidly isolated from the second stage receiving container such that the material is not introduced to the second stage receiving container from the respective receiving container of the first stage,
• the shut-off member being controlled by the alternating device.