SK 3800 Automatic Injection Blasting Machine

Product Description

The SK 3800 is an automatic surface treatment machine that blasts by spraying abrasive media with a density of up to about 4 g/cm³ through an injection system. Parts are taken into the cabin through the loading door at the front of the machine and placed between polyamide (kestamid) fixing elements. When loading is complete, the door is lowered by the pneumatic cylinders on both sides and seals the cabin from the outside.

While the four blasting guns inside the cabin move left and right on the servo-driven horizontal axis, the part turns around its own axis on the rotational axis. This way the abrasive is sprayed evenly over the whole surface of the part. Axis positions are saved in recipes on the HMI screen; for the same part, the saved recipe is loaded and the process is repeated.

In the injection system, the abrasive is accelerated with the help of compressed air supplied from the injector group under the media tank and delivered to the guns. Used abrasive collects in the four hoppers under the cabin and is carried to the cyclone unit by the suction fan; reusable grains return to the media tank, while dust is retained in the cartridge filters.

Systems

Control: Electrical panel, pneumatic panel and HMI screen. Blasting is started and stopped from the HMI, and the cabin lighting and recovery system are managed there. It has recipe, manual control, settings, maintenance counter, alarm and input/output (I/O) list pages. Pressure and the abrasive flow of each gun are adjusted with the regulators on the pneumatic panel.

Cabin: Four viewing windows measuring 500 × 330 mm; the glass is protected with 60-mesh stainless steel screen wire. There are four 50 W LED floodlights on the cabin ceiling.

Loading door and safety: The door is moved by two Festo 80 × 1000 mm pneumatic cylinders, and the seals around it prevent dust from escaping. If the light barrier is entered during loading, the machine stops automatically. The main switch is LOTO (lockout-tagout) compatible.

Axes: The guns move on a Festo toothed-belt axis driven by a 0.75 kW servo motor and an i:10 gearbox. The part is rotated by a 0.37 kW asynchronous motor and an i:10 gearbox.

Recovery and filtration: Four abrasive hoppers, a 4" suction hose, a cyclone unit and a media tank with a lid. 7.5 kW suction fan, four 1-micron cartridge filters, time-controlled jet-pulse cleaning set from the HMI, and a wheeled waste cart.