Haitian Machinery Co., Ltd. has been manufacturing plastic injection molding machinery over 38 years. Today,we are the largest injection molding machinery producer in the world. Over 120 models of series plastic injection molding machines, ranging between 65 and 4000 US tons,have been industrialized. The guarantee performance of HTW series were made possible through the first-class technology and machined by the best CNC machining centers from the top manufacturers in Germany,Japan,U.K. and USA.The lowest maintenance cost HTW series are reinforced by ISO9001 and CE standards. Adhering to the motto "Best Quality & Highest Efficiency- Striving to the Best", Haitian is please to provide both superior products and excellent service for current and prospective customers worldwide.

The Injection Unit and Clamping Unit

Injection Unit: High Precision
• The HTW series machines offer a large range of injection capacities with accurate 6 stages control. Type A,B and C screws can be selected for different injection capacities.
• The use of high resolution linear displacement transducer (0.1 mm) ensures total repeatability of injection performance. Hydraulic screw motor transmits drive to the nitrided screw to ensure optimum performance and long life with a wide range of materials. To reduce structural stress,the carriage movement is carry out by double cylinder

Injection Unit Featur

• Six-(6) injection speed profiles and five-(5) holding pressure profiles.
• Switch over to hold by postion, time or pressure
• Three step charging (recovery) for speed and back pressure, digitally controlled. (Cushion high/low alarm setting)
• Suck back before and after screw rotation
• Screw speed indication on screen by means of contactless sensor.
• Quality nitrided screw and barrel
• Screw produced using high-precision CNC thread grinder to achieve strong plasticising capacity and homogenous mixing.
• Graphic display for injection speeds and pressures.
• Ceramic barrel heaters
• Steel hopper, has material shut off, is mounted on a robust base with sliding for easy emptying.
• Water channels to cool barrel feed throat section.
• Increased plasticising efficiency and ease of barrel purging by using precision-honed barrel.
• Injection and back pressure indicated on gauges and screen.
• Injection screw is directly driven by a high-torque hydraulic motor

Clamping Unit: Strong and Reliable
• The toggle mechanism is a proven 5-point design that provides efficient and reliable movement. Hardened steel pins and bushings are lubricated by a fully automatic alarmed system.
• Automatic hydraulic mold-height adjustment is driven by a planetary gear system via the controller to ensure fast and constant settings.
• The heavy-duty platens are made of cast steel and available with either bolt holes or T-slots.
• The high-tensile tie bars are made of quality steel hard chromed for long life.
• Faster opening/closing without hydraulic shock
• Smooth opening and closing design
• Precise stopping positions
• High-speed clamping
• Opening & closing (adjustable 5 stages)

Clamping Unit Features
• Closing (adjustable in five stages)
• Low-pressure mold protection.
• Linear transducer for clamp stroke control.
• Moving platen supported on precision adjustable sliding shoes.
• Mold setup switch giving low-speed mold opening and closing
• Safety guard with mechanical, electrical and hydraulic interlock.
• Hydraulic core pulling controls complete with double manifold block, (including speed & pressure controls).

The Hydraulic Unit and Other Features

Hydraulics: Accurate & Efficient
• Using world-renowned hydraulic pumps from Vickers (USA), Haitian's hydraulic system offers reliability, efficiency and accuracy in a super-quiet environment.
• Hydraulic motors are from SAI (Italy) or STAFFA (England) to ensure supreme reliability. SAI motors are used on injection moulding machines up to 480 ton while STAFFA motors are employed in all larger capacity machines. All proportional and directional valves are either Yuken,Vickers, or Rexroth.
• The reputation and durability of these brandname components ensures maximum performance,minimal downtime and universal parts availability.

Hydraulic Unit
• Highly energy efficient.
• Digital setting of machine speeds and pressures
• System pressure gauge.
• Hydraulic guard interlock (front & back)
• Oil temperature and alarm monitoring
• Oil level and temperature gauge
• Oil cooler
• 24 V DC solenoids to prevent burn-out
• Independent core in/out pressure and speed.
• Hydraulic unscrewing sequence using core function
• Self-diagnostic function

Ejector Unit
• A standard machine includes central hydraulic ejector with adjustable speed, pressure and stroke to facilitate multiple ejections.
• Four air eject circuits are standard.
• Ejector bar setting is in standard SPI pattern.
• Linear transducer for ejector stroke control.

Heating Arrangement
• PID temperature control via microprocessor controller.
• Nozzle temperature control
• On-screen display of all relevant data
• 7 day/24hour pre-heat schedule temperatures including:
• All barrel heating zones
• Hydraulic oil temperature
• All mold heating zones (Option) Cooling Arrangement
• Intensive cooling zone with water channels through the hopper feed throat.
• Heat exchanger for oil system (oil temperature gauge provided)
• Multi-port mold cooling water manifolds, with individual circuit ball valves.

Cooling Arrangement
• Intensive cooling zone with water channels through the hopper feed throat.
• Heat exchanger for oil system (oil temperature gauge provided)
• Multi-port mold cooling water manifolds, with individual circuit ball valves.

Safe Features
• Hydraulic guard interlock on back and front sliding guard
• Emergency stop positioned front and rear
• Machine alarm system
• Mechanical drop-bar with electrical interlock
• Mold protection at minimal pressure
• Alarm for mold protection
• Protections cover over barrel heater bands
• Purge guard with safety limit switch
• Positive open-stop (optional)

Electrical Controls
• Full on board computer control
• Soft-touch panel for data entry
• Self diagnostic function monitoring
• Monitor and alarm signal
• Siemens DP host computer port
• Changeover position variation
• Pre-set counter for production monitoring
• Standby barrel temperature setting
• Star Delta motor (For medium & large machines)
• Alarm for abnormal conditions
• Control panel layout is neat with well spaced components

HTW Series with SIEMENS Controller With Color Touch Screen