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The result is better quality and overall process efficiency; another concrete step towards the “intelligent factory” for sanitaryware production.
In ceramic sanitaryware manufacture, automation of finishing is a strategic innovation since it works to improve both product quality and overall process efficiency. SACMI develops a specific proposal for the automated finishing of sanitaryware, within the wider context of progressive automation of all stages of production. The solution is versatile and can be personalized according to the level of automation required by the customer.
Robotized finishing at green/leather-hard stage
The process for finishing a sanitaryware item consists of a series of technological work processes innate to forming and handling. The main processes include: removal of casting waste and burr, sponging technical/functional holes, removing excess glue. Some of these processes can be carried out when the piece is at the green stage, whereas others should be performed at the white stage i.e. once the piece has dried out.
With green finishing, the operation is concentrated on the areas of the piece where it is necessary to take action in the very first few minutes after demoulding in order to guarantee the quality of the piece during the next stages of the process. This finishing process can be carried out manually or by means of anthropomorphic robots or other equipment.
For robotized green finishing, SACMI has developed a highly versatile solution which can be personalized and adapted to any casting cell (AVM, AVI, ADI, AVB, ALV, ALS etc). In fact the difference lies, not in the type of production process, but in the level of automation required by the customer.
Work processes
The main work processes carried out with robotized green finishing include; elimination of demoulding water and slip residues from the siphon sump; removal of excess glue used for sticking the rim on the WC bowl; removal of any rough patches present inside the WC bowl, especially in the siphon sump.
It is then possible to remove any imperfections in the water inlet and outlet holes, in the holes for fixture to the wall and in other parts of the rear surface of the WB bowl. Finally, there is removal of casting burr, which can take place either at this stage or, according to the production process in use, at the white stage after drying.
To carry out these operations, the SACMI solution is equipped with specific tools. Typically handled by the robot using pick-up equipment, the most common tools are those which can be customized according to the size and shape of the pieces, such as spatulas to remove excess glue, rotating tools where sponges are installed to smooth surfaces or punches are added to make holes and belt tools; a versatile solution which makes it possible to eliminate burr and join the connection surfaces between the rim and bowl.
To complete the picture there are also fixed stations on board the robot where operations such as water suction from the syphon sump, sponging or hole punching are performed.
Advantages
Robotized finishing significantly improves cell operations and product quality. On one hand the finishing process is made more stable and repeatable which has an advantageous effect on the time/constancy of the pre-drying phase. On the other hand, in terms of overall process efficiency, robotized finishing decreases the overall time required for the operator to work, reducing manual work processes and thus limiting possible errors/defects due to human intervention. Finally, the efficiency of the robot itself is maximized as it can carry out a single “task” to present the article to the operator and make the checks after finishing.
This is why, either separately or in synergy with the new SACMI automation systems for robotized white finishing, automation of green finishing represents a further step towards the “intelligent factory” in the sanitaryware production industry, with immediate and tangible advantages for both the quality of the work processes and the overall process efficiency.
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