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Molding Defects (Insufficient Drying)


picture:Silver streaking from the center pin gate

Silver streaking from the center pin gate


Characteristics

Occurs over the complete molding immediately after passage through the gates.

Causes
  • Problems with drying equipment and drying conditions
  • Inappropriate drying temperature and time
  • Low volume of warm air in the dryer
  • Inadequate hopper capacity (i.e., short drying time) - Faulty temperature regulator
  • Blocking of the air filter
Countermeasures

Review the drying conditions

  • Optimization of drying conditions
  • Adjustment of the dryer's warm air volume
  • Cleaning of the air filter - Optimization of the hopper capacity
  • Repair of the temperature regulator

Please see our grade-specific molding condition sheet.


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 Customers are requested to independently determine the suitability of our materials for their products. We also request that sufficient attention also be paid to laws, regulations, and industrial rights.


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