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Highlights at a glance
✓Brand: Negri Bossi
✓Category: Injection Moulding Machines
✓Made in Ahmedabad, GJ, India
About this item
Ergonomic • Efficient • Versatile
Energy efficiency was at the forefront of the design consideration
Twin pumps allow simultaneous operation of functions
Benefits of servo technology without a reduction in machine performance
Highly efficient servo motor driven gear pump system
Description
The NOVA sT Series are 5-point double toggle clamp, servo hydraulic injection moulding machines available in 180-, 250-, 330-, 400- and 500-tonne models. An important feature of the Negri Bossi servo hydraulic solution is the implementation of twin servo pumps (single on model ST180). Though not the least expensive solution, twin pumps allow simultaneous operation of functions such as ejector and core action during clamp movement, providing the benefits of servo technology without a reduction in machine performance. Energy efficiency was at the forefront of the design consideration and this has resulted in the inclusion of the very latest servo-pump technology, purpose-built for the injection moulding application. The injection unit features a reciprocating screw, with injection capacities from 268g to 4400g (PS) across the range. NOVA sT servo hydraulic injection moulding machines are equipped as standard with: MOTUS, the first ‘True’ Multi touch Controller, Smart Flex clamping unit with generous tie bar spacing to accommodate larger moulds, Moving platen that rides on linear bearings for excellent platen parallelism and reduced energy consumption, Long ejector strokes, Robust in-line swinging injection unit with quick release barrel, Highly efficient servo motor driven gear pump system, AMICO wireless remote service access
SERVO HYDRAULIC POWERED TOGGLE TECHNOLOGY
Ergonomic • Efficient • Versatile
Features the MOTUS Controller
The NOVA sT Series are 5-point double toggle clamp, servo hydraulic injection moulding machines available in 180-, 250-, 330-, 400- and 500-tonne models.
Specifications
NOVA sT SERVO HYDRAULIC INJECTION MOULDING MACHINE SPECIFICATION SUMMARY
Features
CLAMPING UNIT
CLAMPING UNIT
5-point double toggle clamp
Euromap or SPI platen configuration
Chrome plated tie bars
Linear bearings for moving platen guidance and support
Powered mould height control
Automatic central lubrication system by means of electric pump
Three‐stage mould closing speed profile
Three‐stage mould opening speed profile
Moving platen pre‐feed
Mould closing and opening stages governed through closed loop with proportional control valve
Digital reading of moving platen position displayed on the operator interface
Digital control and reading of cross‐head position on the operator interface
Digital reading of clamping force displayed on the operator interface
Mould thickness and clamping force self‐adjustment
Two-stage ejection speed profile
Ejection force control
Digital reading of ejector position displayed on the operator interface
Repeated ejection with stroke and speed control
Ejector proportional speed control, with overlapped movement at opening, models ST250 to ST500 (Optional on model ST180-850)
Ejector return signal
Freely-programmable multiple core pulling control
INJECTION UNIT
Injection unit with in-line hydraulic cylinder
INJECTION UNIT
Injection unit sliding on linear bearings
Swivelling injection unit for easy plasticising screw removal and cleaning
Quick barrel change system
General purpose screw profile, suitable for most types of thermoplastic materials
Bimetallic barrel
Nitrided screw
Injection unit driven by two cylinders to assure perfect nozzle centring
Ceramic heater bands
Alarm threshold for set temperature range
Injection speed and pressure profiles
Switch to holding pressure triggered by screw position, hydraulic pressure or time
Digital reading of screw position displayed on the operator interface
Adjustable screw rotation speed profile
Screw rotation delay
Adjustable back‐pressure profile
Digital reading of back‐pressure displayed on the operator interface
Decompression before and after screw recovery
Intrusion moulding program
Auto purge program
Stainless steel hopper
HYDRAULIC SYSTEM
Single fixed displacement gear pump with servo motor and Baumuller drive with P/Q control (model ST180-850 only)
HYDRAULIC SYSTEM
Two fixed displacement gear pumps with servo motor and Baumuller drive with P/Q control (models ST250 to ST500)
Overlapped ejector movement during opening (models ST250 to ST500)
Optional second servo pump to allow simultaneous movements and valve gate operation during injection (model ST180-670 only)
Optional second servo pump to allow valve gate operation during injection (models ST250 to ST500)
Digital reading of hydraulic circuit pressure displayed on operator interface
Monitoring of oil level, temperature and filter blockage
Oil temperature control system
Automatic cooling water shut-off valve
Oil preheating program
Oil filter in pump delivery and/or return circuit
Oil cooling heat exchanger
Oil gauge
ELECTRICAL SYSTEM
Servo drive
ELECTRICAL SYSTEM
Remote starter with overload cutout
Interlocked main switch to prevent electrical cabinet from being opened when press is energised
Fuses and static relays that control plasticising cylinder heating
Fan for air circulation in electrical cabinet
LED indicators on solenoid valves
Fully labelled electrical circuits
Conforms to Euromap or UL electrical standards
COOLING CIRCUIT
Flow meter with adjustable independent circuits with water temperature and flow rate indication (One circuit is used for throat cooling with the remaining circuits available for mould cooling)
BASE
Part discharge outlet accessible on three sides
BASE
Sound insulated motor‐pump assembly housing
Anti-vibration mounting pad holes
Lubricating oil recovery trough
SAFETY DEVICES
Constructed in compliance with essential requirements of Machinery Directive 2006/42/CE and subsequent amendments
SAFETY DEVICES
All models CE certified by an European certification organisation
Devices comply to European Standard EN 201 and ANSI/SPI B151.1-2007
Rear mould protection with double interlocking device and pump drive motor shutdown
Monitoring of correct operation of hydraulic and electric safety devices
Interlocked nozzle purge guard
Controller
MOTUS TOUCHSCREEN CONTROLLER
MOTUS TOUCHSCREEN CONTROLLER
Innovative gesture navigation system incorporating swipe, scroll & zoom functions.
Virtual object for axis movement based on gesture orientation (Patent Pending).
Smart, slim design with smart phone familiarity.
Customisable interface to personalize screen and functions.
Sequencer to create special cycles
Quick search function for parameter editing, graphical editing and analysis
New functioning modes, “step” and “in production”.
Smart alarms function for improved fault management
5” Colour TFT LC multi-touch display with a 1920X1080 resolution.
Power Link bus connections based on Real time Ethernet technology.
Data transmission is safe, noiseless, and faster with < 2 ms communication speeds.
RFID (Radio-frequency identification) for external access.
ST Servo Pump System
SERVO PUMP SYSTEM
ST Servo Pump System
The NOVA sT is powered by a servo-motor driven gear pump system, using the very latest technology from renowned component suppliers such as Rexroth and Baumuller.
Improved process control reduces reject levels
Lower power consumption results in a lower cooling requirement
Much less noise for a better working environment
Longer oil life, longer lasting hydraulic components and reduced maintenance
These performance enhancements combine to produce a more profitable moulding process for the owner.
This arrangement, coupled with special energy optimising software from Negri Bossi, provides the user with excellent energy efficiency, reduced power consumption, and a more profitable manufacturing process.
An analysis of energy consumption during the various phases of a typical moulding cycle shows that the servo pump solution produces a superior result, when compared to more traditional hydraulic power systems.
The following is one example showing how the NOVA sT provides the customer with important savings in energy usage.
Noise levels are much reduced, producing an improved working environment.
Options
AVAILABLE MACHINE OPTIONS FOR NOVA sT
Options
Core Pull MP/FP
Air Blast MP/FP
Proportional Valve for Hydraulic Ejection
Second servo pump to allow simultaneous movements and valve gate operation during injection (model ST180-670 only)
Second servo pump to allow valve gate operation with maintained pressure during injection (models ST250 to ST500)