Designed in 1998 to transform the future of the injection moulding machine industry, the CANBIO Series of machines from Negri Bossi is still at the leading edge of technology. Even the passing of 12 years has not seen any other hydraulic machine take over that mantle and the CANBIO Series remains the most technologically advanced hydraulic machine on the market today. CANBIO, the worlds first fully digital controlled machine, provides high moulding accuracy allowing excellent repeatability of moulded parts.

To create the right machine Negri Bossi attempted to establish future-user needs and design for them, creating simplicity wherever there was an inclination towards a more complex solution. The series was designed with reliability as the first criterion and the philosophy used to achieve this goal has been reliability through simplicity. With this in mind the machines have been developed with the simplest but most effective hydraulic systems through the use of variable displacement pumps. CANBIO are innovative machines built using easily obtainable components while increased performance combines with low running cost to meet the exacting demands of today's moulders.

The fully automatic Mould Thickness and Clamping Force regulation systems make mould changing both faster and more accurate while the injection assembly features a rapid Plasticising Screw and Barrel removal system, which makes for smooth, easy changeover of the plasticising unit.
A cutting-edge electro-hydraulic system provides rational and efficient use of energy, even when the IMM is being used at maximum performance levels. Digital networking of servo-pumps and proportional distributors ensures outstanding communication efficiency with the IMM control and also allows components to be monitored and set-up directly from the control.

The simplicity and efficiency of CANBIO injection moulding machines come from the implementation of the CANbus system

The CANBIO Series gets stronger and stronger with the recent addition of two new models, a V250 and a V220. These models will replace the V210 with both models offering larger space between the tie bars in both the horizontal and vertical directions. The new models also have longer mould opening strokes and improved mould heights as standard. The price for the V220 remains in line with the V210, thereby offering a better specification at the same cost while a small premium is applied for the larger 250 tonne model.

Negri Bossi UK has just taken delivery of at CANBIO V250-850 to enable this model to be available for demonstration and tool trials at our Warwick premises.

The CANbus system (Controller Area Network) is a control system originally developed by Bosch for the automobile industry. A close and exclusive collaboration with Bosch allowed Negri Bossi to develop hydraulic components suitable for this system and to create a range of injection moulding machines that are fully controlled by digital means for the first time ever. These machines provide state-of-the-art performance with maximum simplicity. The CANbus system permits a range of machines with considerably improved performance levels.

Electronic control systems have the potential to become unreliable when they grow too complex. By careful design of the whole system, both hardware and software, it is possible to organise the data processing tasks in such a way that the risks associated with failure are indeed minimal.

CAN is a two-wire serial data link which allows several computer components to share a digital communications pathway, greatly reducing the complexity of the wiring previously needed to link controllers.

The CANbus system speeds up design, installation and commissioning times, reduces the cost of wiring, offers noise immunity, minimises wrong connections and increases flexibility by allowing the simple addition of extra devices to the single cable.

By means of the user interface, the PC receives the set points to carry out the machine cycle. It also processes the orders to be sent to the actuators according to the stage of the machine cycle, to the feedback signals and to those signals coming from discrete devices. The information that is provided by the linear transducers is processed by the electronic control in order to carry out closed-loop controls of pressures, velocities and positions.

The control signals are sent, by means of the field bus, to each element of the system, which then returns real feedback signals (delivery, pressure etc.).

In the case of rapid events, that require the fastest reaction possible to the event itself in order to assure the repetitiveness of the process, the functioning unit provides a direct dialogue between the transducer, which compares the real values with the programmed switching thresholds, and the relevant actuator (pump, valve). 

The adjusting data relevant to the stage that follows the switching are previously memorised in the component and activated only at the time of switching.  During the switching stage the electronic control functions only as a supervisor to the overall functioning but is not required to monitor the switching position at the same frequency as with a standard system. It controls the various machine phases but is no longer responsible for the "fast" elements of the cycle. The dedicated microcontrollers built in to all of the CAN equipped components do this work at a much higher frequency than was possible before.

This method guarantees the fastest possible reaction times and improved repeatability by, essentially, removing the middleman (i.e. the machine controller) from the operation.

The CANbus system is simply the hardware and software support that enable the exchange of information between the elements of a system with a guarantee of integrity and security of the data.

CANBIO, the worlds first fully digital controlled machine, provides high moulding accuracy allowing excellent repeatability of moulded parts.