Automatic Steam Heat Shrink Tunnel Machine

The Automatic Steam Heat Shrink Tunnel Machine from Technogen Enterprise is designed to shrink compatible sleeve labels and tamper-evident neck bands onto bottles and other suitable containers using controlled steam exposure. The tunnel provides an alternative to electric hot-air shrinking where the sleeve material, container geometry and required finish benefit from directed steam application.

The equipment incorporates a modular steam tunnel constructed using AISI 304 stainless steel. The described design supports configurations with three to six steam zones, allowing steam flow to be adjusted according to the container shape, sleeve material and desired shrink profile.

Adjustable steam manifolds distribute steam toward selected regions of the sleeve as the container travels through the tunnel. Independent steam-zone control helps manage the progressive shrink process, while the specified four-axis adjustment arrangement supports positioning for different bottle sizes and geometries.

The machine uses a variable-speed modular Delrin slat-chain conveyor. The specified working direction is left to right, with rated output of up to 60 bottles per minute, depending on the container dimensions and required sleeve finish.

Suitable sleeve materials include PVC, PETG, OPS and PLA, subject to film construction and application testing. Adjustable steam exposure is especially important where excessive or uneven heat could distort the sleeve or produce an irregular finished appearance.

The stainless steel tunnel provides access doors on both sides for maintenance. An air blower with an adjustable steam exhaust window helps remove excess moisture and steam, while an integrated drip tray collects condensate generated during operation.

The specified tunnel dimensions are 1.5 × 0.4 × 0.3 metres, with an associated 2-metre conveyor. The machine is described for containers up to 300 mm high and 200 mm in diameter. Steam capacity is specified as a maximum of 27 kg/hour, with a stated temperature of 80–95°C.

The technical data includes a 27 kW, three-phase electrical rating and identifies an optional steam generator equipped with heavy-duty heaters. The source of steam, actual generator inclusion and utility arrangements must be clarified before final installation planning.

The machine requires approximately one metre of maintenance clearance on all sides, filtered feed water where a steam generator is used, and operation by a trained or appropriately instructed operator.

Technogen Enterprise manufactures, supplies and exports automatic steam heat shrink tunnel machinery from Ahmedabad, Gujarat, India, serving packaging facilities requiring controlled sleeve shrinking and configurable steam-zone arrangements.