Services

Litla srl is a recognized authority in polymer die construction, known for its rapid product development capabilities. The prototype has become one of the most vital elements in automotive product engineering, not just for feasibility studies, crash tests and reliability tests, but for the entire vehicle development cycle. This central role calls for the maximum quality, speed and economy in constructing prototypes, and spurs continual research in innovative technologies and new materials.

Design and Engineering

Prototype building hinges on the skills of expert designers. The die comes to life on the workstation screens, where specialists model surfaces and generate toolpaths for milling machines.

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Milling machining

Numerical control milling machining 3 axes for metalworking (operation range up to: X 5000 mm; Y 2000 mm; Z 2000 mm)

Dies and Tools

Litla builds resin and metal tools since the early '50s. The experience accumulated over the years ensures expertise in this area. The technology provides innovative materials that meet the accuracy and speed of execution requests. Using a special mixing machine, the resin is cast into the mold. The process does not vary depending on the size of the detail to be implemented; the casting can be carried out in a few minutes for small molds, until arriving to molds of several tonnes in weight.

Mass casting

Our company offers different materials and methodologies for the constructions of punches and matrixes suitable for various uses, from production of prototypes up to limited productions. Compared with metal dies, our technology allows a notable reduction in construction times, although it produces resistant and lasting punches.
The MASS CASTING system can be used to produce dies of any size: from some litres up to many m³. The system is characterized by a specially low exothermic reaction and this quality together with some particular casting techniques is used to remove almost completely the phenomenon of contraction. For the construction of dies any combination of materials and systems of casting can be used. For example, the punch can be constructed by pouring a rough-hewing and machine it at high speed to the requested sizes, while the matrix and the blade-holder will be modelled with a casting on the punch itself, finishing in this way the construction of equipment. The choice of materials and techniques is suggested from the requested characteristics of services, from the methodologies of working and from the availability of services. Equipment constructed by using these materials and technologies will product parts quite functional with a fraction of costs and times of equipment made in steel, aluminium or also in zinc alloy.

Parts pressing

The dies are subjected to pressing tests. In this cycle of operations, in addition to the adjustments of strokes and pressures of the   press, some little fittings are executed to contribute at the functionality of the equipment.
The die resists to pressures that will reach up to 1000 tons concerning our most powerful press. We produce big outer panels for prototypes as bonnet,  tailgate, roof, floor, bonnet,  doors and big inner reinforcements as floor, A-pillar, B-pillar.

Hot stamping

The hot stamping is a thermo-mechanical cycle to which they are subjected to boron microalloyed steels (22MnB5) during forming.The sheet is heated in the furnace until it reaches 950°C to obtain an austenitic microstructure.

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Laser Cut

In the prototype shop, trimming operations are performed using laser cutting equipment. The versatility and accuracy of these machines makes it possible to cut sheet metal parts of any size and gauge, as type changes can be made quickly and easily. As a result, it is not necessary to use the costly blanking dies normally employed in production.

Sheet metal working

During prototyping, the expert panel beater’s hand skills must stand in for costly production tooling. Undercuts,
hard-to-reach hem flanges, trimming operations that are not possible with lasers and shape corrections are all done manually.

Metrological inspections

very step of production is subject to stringent controls by specialized personnel. All products are inspected and approved before delivery to the customer, and are accompanied by full documentation.

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