Operation of a retraction device of an automatic bundler

Method for operating a retraction device (1) of an automatic bundler (2) that is designed to be used in a facility for processing products (3) that are delivered as bundles (4) that each group multiple products (3) held together with a retractable film (5);

• the retraction device (1) being equipped with a retraction furnace (6) comprising at least one heating unit (7) that is designed to heat air of the retraction furnace (6) and at least one air circulation unit (8) that is designed to distribute heated air in the furnace (6);
• the method comprising a production mode configured to produce output of bundles (4) and a superficial standby mode configured to save energy during a temporary production stop;
• wherein
• the superficial standby mode reduces a speed of at least one air circulation unit (8) as compared to production mode, to a non-zero value, the superficial standby mode lowers a setpoint temperature of the furnace (6) by a predefined value relative to the production mode to a set value in standby mode,
• the set value in standby mode being calculated so that the furnace drops in temperature to reach the lowered setpoint temperature and then rises in temperature to reach an operating temperature of the production mode upon expiration of a known minimum stop time,
• the known minimum stopping time being a period of time from a beginning of the superficial standby mode to when the products (3) are again ready to be processed by the bundler (2).