As it is known, Meccanica Pi.Erre is leader in the Trimming Technology and of course, it is leader in trimming of structural components too. In this regards, the most popular and built ones so far are suspension parts, generally called Shock Tower, Langsträger or side member, cross-members of axles, instrument panel, that is dashboard frame.
MPR has been dealing with trimming of this sort of components for more than 15 years, being MPR the first company who started to trim structural shots in Magnesium, such as instrument panel and seat frames.
Structural components in aluminum alloy Magsimal and Silafont should be considered as the new challenge and frontier of HPDC, nonetheless, only main OEM and TIER1 have been currently and strongly committed to the production of this sort of components in light alloy; most of these parts are in fact still manufactured in steel.
The replacement of steel structural components with the aluminum ones has as result a more competitive production cost. Moreover, this leads to the important goal of “save weight”, contributing the lightweighting of vehicles. This is a very popular aspect during last years, because this means a less consumption and lower carbon dioxide emissions.
The productive process of structural components must be of high level, so that it can be defined as HTP, “High-Tech Process”, where trimming operation must necessary be of high technical level and of high technological content.
Said that, production of structural components must take place in die casting plants, fully automatized and interlocked by robot; thus, trimming solutions –in particular trim dies and trim presses – must in turn have a specific configuration.
In fact, regarding structural shots, trim tool and trim press are designed and built by Meccanica Pi.Erre in order to provide of course a full trimming of external and internal profiles, of holes, of ingates, of overflows and of chill-vent channels. This operation must ensure at the same time the ejection of chips at each cycle; this is a very determinant aspect for the running of die casting cell.
Furthermore, Meccanica Pi.Erre pays particular attention to the interface between trim tool and trim press, and also to full cell configuration; this not only to gain a complete trimming, but also mainly to turn a raw shot into a semi-finished piece, ready for machining operations. This absolutely avoids any damaging and expensive operations of manual re-work, which of course would negatively affect on process and on production costs.