Rösler RRB 27 6

Rösler shot blast machine RRB 27/6

The powerful Rösler RRB27/6 continuous blast machine is equipped with 6 blast turbines and a transport system.

This roller conveyor blast machine is used in professional steel construction for cleaning and final scaling of rusty steel in the form of sheets and profiles (grade B) which are transported into the blast machine dry, free of oil and grease. The material is automatically transported into the blast machine by a transport system consisting of roller conveyors. The suitable transport speed is reduced to the programmed value during the blasting process. After the blasting process, the profiles and sheets are cleaned of abrasive and discharged before leaving the blast cabinet by means of a brushing and blowing unit which automatically adjusts to the height of the components.

The Rösler continuous blast machine has a pass-through opening of 2,700 x 500 mm. Six Rösler Hurricane HR42 blast wheel turbines with direct drive and an axial mechanical abrasive pre-acceleration of 15 kW drive power each are used.
The operating speed is 0.8 - 2.0 m/min and the throughput speed is 0.8 - 10 m/min.
For efficient blasting, round abrasive ø 0.9 - 1.2 mm, 45 - 51HRC is used.

The Rösler blast machine is suitable for blasting of:

Components with a maximum width of 2,500 mm, a minimum thickness of 6 mm and a height of 500 mm. For sheet metal, the max. thickness is 76 mm. The minimum length due to the roller spacing of the transport system is 2500 mm. The largest profile to be machined is a HEB 1000 beam. Shorter or thinner parts are transported through the plant by a wire basket.

The blast machine consists of a manganese steel machine housing. In addition, the blast chamber has an 8 mm thick manganese wear strip lining.
The inlet airlock and outlet airlock have rubber curtains to keep the abrasive in the blast chamber during blasting.
Furthermore, the blast machine includes a collection hopper with screw conveyor and a bucket elevator, each with a 3 kW gear motor and electronic speed monitoring. A transverse screw conveyor from the bucket elevator to the abrasive container as well as an abrasive cleaner with screen and a cascade air cleaning system, an abrasive container with distribution screw, an abrasive pre-separator, an inspection platform with ladder, an abrasive control system and an electronic scanning in the roller conveyor for the abrasive control with automatic adjustment to the throughput speed.
The workpieces are conveyed through the machine via transport rollers Ø 140 x 2,500 mm and further transport rollers in the blast room Ø 140 x 2,500 mm in wear-resistant, hardened design made of solid material.
The roller table drive has 1.5 kW is electronically adjustable from 0.8 - 10 m/min with digital display in the control cabinet.

Rösler brush blowing device

The blast machine has automatic height adjustment of the brush and blow-off system. There is a safety shut-off at the exit roller conveyor. The brush blow-off device has a feed-through opening of 2,700 x 700 mm and an operating power: approx. 13 kW. The integrated workpiece cleaning system uses a rotating brush and a targeted air stream. This consists of a machine housing with collecting hopper, screw conveyor and gear motor, transport rollers Ø 140 x 2,700 mm, a fuse for the brush and a cross-flow blower. The brush, screw conveyor and cross-flow blower are integrated in one frame and are adjusted together to the correct height.

Automatic suction unit

The fully automatic extraction system is suitable for continuous operation and consists of a high-performance pulse cartridge filter type RF 100/12 P/s
. The fan motor power is 15 kW, designed for a working temperature of max. 50°C. furthermore, a sound insulation hood is installed. The air consumption is 10 - 12 Nm³/h at 6 - 7 bar. 12 filter cartridges are installed in the system.

Rösler system control

Consisting of a central control cabinet with PLC control type Simatic S7-300 and Siemens operator panel type OP 177 for manual and automatic operation.
Power supply 400 V ± 5 %, 50 Hz, 3 ~/PE. Voltage fluctuations of 10 % are acceptable according to the manufacturer Rösler.

Transport system:

Infeed roller conveyor 20 m length
Outfeed roller conveyor 24 m length
Roller dimensions 140 x 2700 mm, roller pitch 800 mm. Max. Load 1500 kg/m1
1 bay Lifting cross transports with 6 units length 7500 mm including control panel