General purpose

Omipa’s extruders, with their dosing systems and innovative screw profiles, have been designed and manufactured to guarantee the best use of plastic materials. Most of all, they are in a position to produce all the typologies of today’s high technology sheet and foil with the utmost flexibility.

Extruder feeding is accomplished through a volumetric dosing system (or, upon request, through an integrated gravimetric system), assuring rapid change of the dosing percentages and of the material types, combined with easy and rapid cleaning.

The particular extruder screw design, with its innovative helical profile, is a perfect example of Omipa’s knowhow to optimise the production of different thermoplastic materials.

The whole integrated system, from the dosing unit to the extruder, with or without venting, gear-box, motor, filter changer and polymer feed pump, all controlled by an efficient thermoregulation system, always ensures homogeneous and constant mixing and plasticization, with the highest versatility.

Furthermore, with the same objective of responding to concrete production needs, Omipa has developed a series of coextrusion groups, with rapid change of the configuration, in order to process the different materials to be coextruded, on the basis of the number of layers and specific flexibility requirements.

• plate-type coextrusion groups (up to 3 layers)
  Used for materials that have similar characteristics or for fixed configuration coextrusion.
• multi-layer coextrusion groups (up to 9 layers)
  Used whenever it is necessary to vary frequently the percentage ratio between the layers, whenever flexibility of use with replacement of the selector is required or for coextrusion of materials with very different characteristics.
• multi-layer dies

An excellent product is the result of perfect team work: together with the different typologies of coextrusion blocks Omipa offers its dies and calenders.

The range of dies, of the Omiflex and Omifix series, offer different solutions, each of them specially designed depending on individual production needs:

• with flexible or fixed lip
• with adjustable of variable “fast gap” lip
• with or without choke bar
• with differently configured die bodies
• with multi-layer dies.

The range of calenders is flexible too, as regards both their configurations and their characteristics. They can be vertical, 45° or horizontal, also with variable position of the third roll; different roll diameters and number of rolls (up to 5) can be provided.
In all the calenders, closure of the rolls is controlled by an oleodynamic unit, whereas micro-adjustment of the gap between the rolls is fully automatic and controlled by microprocessor.

Different gap values can be stored and recalled at any time: the computer sends the command to the PLC, which positions the rolls according to the new value.
The temperature of each roll is independent and controlled by a newly conceived thermoregulation unit. The thermoregulation fluid can be water or oil, as needed; for special requirements, the temperature can reach up to 180°C. The innovative Omipa design of internal circuits for passage of the fluids guarantees a high thermal exchange combined with easy cleaning.

Omipa has concentrated its design efficiency on the development of a system for rapid change of the rolls, which is a key factor of success in many particular productions, especially that of embossed sheets.
Every roll is equipped with independent motorization and a highly precise motion transmission system.
Robust and reliable, tireless and flexible, Omipa calenders ensure maximum accuracy tolerances; and minimum tolerance of defects.

Seeing as we have designed a line capable of guaranteeing high hourly output levels with so much care, certainly we do not want to slow down speed during the final stages of production. This is a crucial aspect in the management of high output lines, on which we have concentrated all our experience and research activities.

The different cutting systems (longitudinal cutting and cross cutting) and the stacking and winding modalities have all been designed to be perfectly up to the task as regards productive efficiency of the previous working phases. Both for sheet and for foil / film, we will choose the most suitable configuration together, on the basis of your needs. In any case, cutting will always be perfectly controlled by a computerized managing system, and rapidly modifiable, with automatic positioning.

No matter whether you produce film and foil to be wound on reels or sheet to be stacked, your product will always be protected and respected in the best way possible, thereby avoiding any possible rejects due to inaccuracy.

1. Variable speed rotary blade trimming unit, with motorisation and automatic positioning. When you choose Omipa you will always find the most adequate solution to your production needs.
2. Cross cutting unit with direct cut fast mechanical shear: the new technology of motor – blade direct transmission leads to an increase in speed and accuracy of cut, combined with low maintenance requirements.
3. 2-axis winder with an automatic control cutting system, perfectly integrated with the line.

When you choose Omipa you are sure you will always have the best process qualities: stability, simplicity and customisation.
All Omipa lines are supplied with a supervision system controlled by PLC.
The software, produced internally, is always tailored to individual needs.
The use of a PLC allows you to record and monitor all the line process parameters: speeds, revolutions, temperatures, absorptions, outputs, pressures and alarms.
Designed for the central control of the entire line and of each single equipment, the system guarantees precious advantages as it makes line management more practical and functional.
Each alarm (the system can manage up to 400) can be connected with a control procedure, enabling the operator to solve problems by consulting stored instructions.
Codified recipes can be stored and recalled in real time, whenever necessary, thereby making it possible to modify line parameters easily and quickly, with the possibility of immediately repeating the desired production, without slowing it down in any way.

All the data provided during line operation are, in turn, stored to create an overall historical record of all the production parameters, such as:

• graphs of pressures, motor speeds, line output trends
• automatic starts
• line values
• alarms (date, time etc.)
• product management, stacking systems etc.

In addition, the software will allow you to manage:

• automatic start-ups
• pre-heating by means of a timer
• line maintenance program.

Although this is a complex system, it was studied to offer the operator extreme simplicity of use. The entire line management is concentrated in a single work station, and a graphic display of all the functions allows direct action at every point of the line from a single control site.
The system can be interfaced with the main corporate data management software, for global and integrated control of production (orders, purchasing, stocks).
The digital control system is the “mind” of every Omipa extrusion line.
For the operator, everything becomes easier, safer and more manageable. For the company, practical advantages result in better overall control of production with a consequent higher profitability of the line.