Custom Injection Molding

Andercraft mastered injection molding years ago, in both the medical and commercial fields. This includes regular molds, hot-runner molds of all types, three plate designs, molds with hydraulic unwind cores, straight core-pulls, and more.

  • Nylons
  • Acetals
  • Polypropylenes
  • Styrenics
  • PVC’s (rigid and flexible)
  • Custom blends
  • Acrylics (including optical grades)
  • Polycarbonates
  • Glass-filled materials
  • ABS
  • PET & PETG
  • Polysulfone
  • Ultem
  • Any Thermoplastic Material

Water Systems Used:

One of our "molding basics" is to have clean, accurately controlled water systems. Our mold cooling water is based on RO (Reverse Osmosis) water, with chemical and biological additives. This system is closed-loop, 100% filtered every pass using large bag-filters. This removes all loose scale deposits (calcium-carbonate and rust), and any bits of Teflon tape or pipe sealants to keep small water passages and fountains clear. Often molds cooling lines come out of the press cleaner than when the run began.

This system is run at a constant 55°F/13°C to prevent any condensation on mold surfaces which can drip onto products and rust molds.

For hydraulic cooling and mold temperature controllers, we have a similar system using closed-loop water which is cooled by tower water, typically around 80°F/27°F. This way we don’t mix hot water systems with cold. We have never had to pull a machine’s heat-exchanger for cleaning at our plant in Mexicali, which results in cool, clean hydraulic fluids. All machine oil is closely thermostatically controlled, as are the feed throats.

We have two 5000 sq. ft. class 100,000 clean rooms which are air-conditioned with positive pressure and regularly tested for compliance.

Even our warehouse is temperature controlled, where we do most commercial work.

All of the above results in a very controlled environment which eliminates constant machine adjustments often required due to seasonal and day/night temperature changes. These things are essential in order to achieve our goal of zero-defects.

By programming established tolerance parameters into most any of our machines, we can direct the robot or use a flip-chute to reject any shots that exceed any of the possible dozens of tolerances entered.

Mold Qualifications:

We run all types of customer-required mold qualification systems, including:

24 hours + 32 shots with only critical dimensions

IQ (Installation Qualification)

OQ (Operation Qualification)

PQ (Process Qualification)

FAI Full Dimension (First full Article Inspection Report)

CPK’s (Process Capabilities)

Gage R&R (Gage repeatability and reproducibility)

FMEA’s (Failure Mode Analysis and Effects)

Custom Injection Molding