INJECTION CONTROLS

Hunkar DAC-V Injection Process Control
with Real Time Auto-Shot Correction

SET-UP SCREEN

1. Feature - Boost Cutoff based on Ram Position, Peak Hydraulic Pressure, or Cavity Pressure.
   Benefit – This provides automatic and precise control suited to users needs, even when melt conditions change and prevents flash when mold filling requires excessive pressure.
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2. Feature – Injection Profile Control with digital interpolation of the injection velocity profile.
   Benefit – Points are automatically calculated for precise, accurate speed control every cycle.
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3. Feature – Automatic Shot Correction compensates for variations in melt density due to lot-to-lot fluctuations of the raw material or changes in virgin to regrind ratio.
   Benefit – The program uses the injection molding machine as a rheometer to automatically determine the amount of material to be plasticated to ensure consistent part packing, precise dimensional stability and uniform weight control.
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4. Feature – Automatic Injection Profile provides automatic calculation of the injection velocity profile by using an Expert program that computes the profile setpoints from empirical data gained from successful setups.
   Benefit – The program is designed to optimize the machine cycle time and prevent flashing of the mold. This feature is especially useful in expediting the setup of a new tool. It can also be modified to “fine tune" a given setup for an existing job.
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5. Feature – Boost Pump Delay is used to defer the transition from high volume flow to low flow, allowing greater flow for packing pressure.
   Benefit – Controlled packing pressure transition eliminates ram bounce and assures correct part packing. This feature is particularly beneficial to eliminating short shots for those making large parts and/or using multiple cavitation tools.
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6. Feature – Floppy Disk Drive for data storage.
   Benefit – Non-networked users can save job setups for future use, along with SPC data for process diagnostics.
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7. Feature – Serial User Access Port enables the connection to a variety of gauges, gauge fixtures, weigh scales, bar code readers, laptop or other personal computers, etc.
   Benefit - Easy access to correlate part characteristics with process data. Includes plug & play compatibility with our Data and Bar Code Division's time & attendance product line for a complete data management solution.
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8. Feature – Decompression Control before or after plasticate based on ram position.
   Benefit – Position based decompression prevents “drool” and cold slugs, causing very precise material “suck-back” control. This results in substantial defect reduction and cycle repeatability improvement.
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9. Feature - Industrial Touch Screen is both durable and easy to use for selecting control setup, production, or diagnostic displays.
   Benefit - Easy one screen job setup with saved download capability decreases downtime during tool change.
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10. (pictured below)
    Feature - On Board Process Diagnostics and Help screens.
    Benefit - Production, Process Help, and a number of process diagnostic screens allow the user to "fine tune" the process for long term repeatability. Process Help offers SPI solutions to eliminate specific product defects.