We have always strived for and improved upon one basic ingredient in all our machines: user friendliness.
Throughout our years of activity we have noted that every machine we supply has, on average, a set up for four profiles. Thirty years ago we introduced the DALLAN COMBI system to offer our customers the possibility of fast production changeover and that system, improved and refined, is still in use today.
The DALLAN COMBI roller change system consists of a cassette system for fast changeover with features that are unique on the market; it is suitable for Just-in-Time manufacture, which requires extremely fast set-up times.
The DALLAN COMBI forming toolhead includes gearing and drive shafts and is assembled together with the profile loader and straightener on a single platform. It can be lifted thanks to sturdy anchors and may be handled with bridge cranes and also suitably sized lift trucks. Several DALLAN COMBI forming toolheads may be mounted (one for each profile) but two toolheads are generally used: one mounted on the machine and one off the machine on which roller changeovers are carried out in hidden time.
The Combi is applied with special conical guides to the bedplate of the roll forming machine, which includes protective devices and the drive unit. Once in position it automatically engages the gear wheel. For the production changeover, the rollers are already positioned and adjusted on the Combi and the metal strip can therefore be fed immediately into the machine.
The DALLAN COMBI system offers another great advantage: with more than one Combi available, when maintenance has to be carried out on one toolhead the machine can continue running with the second Combi so that there is no down time in production. This means that maintenance can be scheduled on the basis of the number of millions of metres that have been produced by each toolhead.
The precise machining of the toolheads, the control and assembly of the roller shafts and the alignment with laser system (link to FB) ensure precise and repetitive references for installing a set of rollers, making the installation and adjustment of the rollers and the profile extremely easy for your operator.
Exactly the same philosophy of the Combi for Rollers, is applied to the fast changeover system of the dies. Special bedplates include locating pins and multiple dies, which can be prepared off the machine. When a changeover is necessary, instead of substituting the equipment die by die, the whole bedplate is changed complete with sensors, pullers, as well as pneumatic and hydraulic connections.
With Dallan equipment, production changeover times are more than halved compared to any traditional system.