The Society of Plastics Engineers
Great Salt Lake Section
P.O. Box 901943
Sandy, UT 84090-1943

Address Service Requested

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Easy to do once it's out and clean.

  • Check the non-return valve for proper seating and shutoff.  Failure to seat/shutoff may result in:
  • Sinks or short shots
  • Splay
  • Screw turning on injection forward (a good indicator of a problem)
  • Air bubbles
During setup, make sure that the nozzle tip hole diameter is just slightly smaller than the sprue "O" dimension.  If the hole is either too large or too small, problems (material degradation [black specks, brown or yellow streaks], difficult sprue removal, splay, bubble streaks, difficulty filling, etc.) may result.
During setup, be cautious about screw speed.  If the speed is too high, damage to the non-return valve may occur.  In general, the smaller the diameter of the screw, the greater the maximum RPM that can be tolerated.  For example, a 60 mm (approx. 2 3/8") screw with a common NRV can handle about 150 RPM.  If the screw is 120 mm (4 ¾"), the max drops to about 75.
Remember, if the screw and barrel don't work, neither does your account receivable department.

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ers Division, $17,000 to the Thermoplastic Materials and Foams Division, and $42,800 to the SPE, as their portions of the Polyolefins Conference ($76,800 total).
· North Texas Section presented $3,700 to the Student Author Travel Fund

  • Mid-Michigan presented $500 to the Cramer Scholarship Fund
· Detroit Section presented $16,000 to the SPE Foundation, $1,000 to the Essay Contest, $1,000 for the ANTEC Opening Reception, $9,000 for Educational Programs and $5,000 to the Dailey Scholarship Fund ($32,000 total)
· The Thermoforming Division presented a total of $256,526 to the Society and the Foundation, distributed as follows:  $75,000 for the SPE Investment Fund, $2,000 for the Student Reception, $3,000 for the Student Author Travel Fund, $96,526 as proceeds from the Thermoforming Conference, $10,000 to the SPE Foundation for the Plasti-Van Matching Grant Program, $25,000 for the Equipment Grant Program, $15,000 for the Scholarship Fund and $40,000 for the Dr. Polly Polymer program.

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