Project: ROBOBLAST 35-25
Industry: Industrial door production
A Slovenian producer of industrial doors, for hotels, companies, shopping malls, hospitals, tunnels etc. need preparation of surface before powder painting. They produce lots of different products, both in different sizes - door frames and full doors (max. 3200x2500x250mm).
For this project wheel blast wasn‘t appropriate, because of thin walls (1, 5-3mm thin), which easily gets twisted and damaged. A customer wants to have a fully automatized process so the operator shouldn‘t have contact with the blasting process. Parts must be blasted controllable and without mistakes, with gentle roughening for better adhesion of paint. We have to achieve quantities 40 doors in 8 hours.
We have designed a cell with turn station. Blasting cell has pneumatic collecting and recycling of abrasive. Manipulation of a part is automatic on hang transporter. The cell has 1 robot with two nozzles, but there is provided space for 2 robots. A robot has space for more than 100 recipes. It is equipped also with a remote control unit.
Purpose of chamber ROBOBLAST 35-25 is to sandblast doors and door frames (max. dimension 3200x2500x250mm). Doors and frames can be of different sizes. The way that this machine works is that user brings in the doors or frames which are hanging on the conveyor. He locks them on the lifting/rotation unit in front of the chamber. Then he checks if either he has the doors or door frames that he needs to be blasted. The machine needs the dimensions of items hanging on the conveyor. We can blast one, two or three doors/frames at ones. Then the AUTO button is pressed and the machine starts the cycle. First rotation unit lifts and rotates the items so that they are aligned with the conveyor line that goes into the chamber. Items are then locked with the driving unit which drags the doors or frames inside the chamber. The conveyor is driven by the robot so he can manipulate with the items in the way that they are in good position for him. Blasting is done with two blasting nozzles so we can get as much coverage as we can. At the end of the process when the conveyor is traveling back to the rotation unit the robot is air cleaning the doors. On the rotation unit, the doors/frames are turned for 180° and the process is repeated for the other side. At the end of the process, items are waiting in the started positions for the user to take them out and bring another one. The machine is designed in such a way that it can be upgraded to the second robot so we can avoid turning items for 180° and losing cycle time. As for blasting part machine is equipped with filter centre 4/6-700 which serves for transporting the media to the hopper and to clean the chamber for better visibility. Media is transported via robust hoses to the cyclone where the separation is done (dust is transported to the filter and good media is stored into the hopper). Hopper then fills up the pressure blasting machine TZP 600 on which we have connected 3 blasting guns. Two are for the robot to control and one is for manual blasting. This process is automatic and when the media hits the low-level sensor the pressure pot is automatically filled so that the process can continue. This way the surface is blasted precise and controlled.