Injection Molding Machines and IML Robots

The CANBIO sT Series are 5-point double toggle clamp, servo hydraulic powered 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.

he injection unit features a reciprocating screw, with injection capacities from 268g to 4400g (PS) across the range. CANBIO sT servo hydraulic injection moulding machines are equipped as standard with:

• TACTUS™ Touchscreen PC with Powerlink, user-friendly interface with full range of control parameters
• 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

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 mold height control
• Automatic central lubrication system by means of electric pump
• Three‐stage mold closing speed profile
• Three‐stage mold opening speed profile
• Moving platen pre‐feed
• Mold closing and opening stages governed through closed loop with proportional control valve
• Digital reading of moving platen position displayed on operator interface
• Mold thickness and clamping force self‐adjustment
• Digital control and reading of cross‐head position on operator interface
• Digital reading of clamping force displayed on operator interface
• Two‐stage ejection speed profile
• Ejection force control
• Digital reading of ejector position displayed on 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 sliding on linear bearings
• Swiveling injection unit for easy plasticizing 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 centering
• 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 operator interface
• Adjustable screw rotation speed profile
• Screw rotation delay
• Adjustable back‐pressure profile
• Digital reading of back‐pressure displayed on operator interface
• Decompression before and after screw recovery
• Intrusion molding 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)
• 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
• Remote starter with overload cutout
• Interlocked main switch to prevent electrical cabinet from being opened when press is energized
• Fuses and static relays that control plasticizing 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 mold cooling)

Base

• Part discharge outlet accessible on three sides
• Sound insulated motor‐pump assembly housing
• Anti-vibration mounting pad holes
• Lubricating oil recovery

Safety Devices

• Constructed in compliance to essential requirements of Machinery Directive 2006/42/CE and subsequent amendments
• All models CE certified by a European certification organization
• Devices comply to European Standard EN 201 and ANSI/SPI B151.1-2007
• Rear mold protection with double interlocking device and pump drive motor shutdown
• Monitoring of correct operation of hydraulic and electric safety devices
• Interlocked nozzle purge guard

CANBIO sT end market applications

• General Small Size Parts
• General Medium Size Parts
• Automotive
• Construction
• Industrial
• Appliance
• Household
• Aerospace
• Electronic & Telecomm
• Technical Molding
• Packaging
• Food & Beverage
• Containers
• Closures

Details