English Русский

Shanghai Yixing Technology Co., Ltd.

contact@yxplasticmolding.com

  • Home
  • About us
    • injection workshop
    • mold machining work shop
    • our client
  • products
    • custom plastic injection mold
      • customized injection mold
      • customized rotational mold
    • custom plastic injection molding parts
    • custom stamping mold
    • custom die casting mold
  • Service
    • 3d scanning
    • 3d printing
    • Mold design
    • mold making
  • Mold test Video
  • Case sharing
    • new mold case
    • injection common sense sharing
  • F.A.Q
  • Contact us

injection common sense sharing

  1. Home
  2. Case sharing
  3. injection common sense sharing
  4. defects of injection transparent parts ...

defects of injection transparent parts

defects of injection transparent parts

Transparent parts of molten spots, crazes, cracks, polystyrene and plexiglass can sometimes see some glittering filamentous crazes through the light. These crazes are also called bright spots or cracks.

This is due to the stress generated in the vertical direction of the tensile stress, and the difference between the completion rate of the non oriented part and the heavy flow orientation of the right polymer molecules.
resolvent:
Eliminate the interference of gas and other impurities and fully dry the plastic.
Reduce the material temperature, adjust the material barrel temperature in sections, and appropriately increase the mold temperature.
Increase the injection pressure and reduce the injection speed.
Increase or decrease the pre plastic back pressure and reduce the screw speed.
Improve the exhaust condition of runner and cavity.
Clean the nozzle, runner and gate for possible blockage.
Shorten the molding cycle and eliminate crazing by annealing after demoulding: keep polystyrene at 78 ℃ for 15 minutes or 50 ℃ for 1 hour, and heat polycarbonate above 160 ℃ for several minutes.

Related News

analysis warpage of thin wall injection molded parts

analysis warpage of thin wall injection molded parts

INTRODUCTION FOR IMD

INTRODUCTION FOR IMD

analysis of dents in injection molded parts

analysis of dents in injection molded parts

Key points of metal insert design for injection molding products​

Key points of metal insert design for injection molding prod

The reason and treat method poor exhaust of injection mold​

The reason and treat method poor exhaust of injection mold​

Fresh air system advantage

Fresh air system advantage

Categories

  • new mold case
  • injection common sense sharing

Links

Google.comyxplasticmolding.com

custom injection mold

custom stamping mold

LatestPost

  • curved parts injection mold test
    2023-07-07
  • pipe fitting Tee and Cap Mold test
    2023-07-06
  • mold making 3
    2023-07-05

Feedback

Contact Us

109353593

+8615000908770

+86 21 51662821

contact@yxplasticmolding.com

yanahe

Room 230, building 15, 6066 Songze Avenue, Qingpu District, Shanghai

wechat

Copyright © 2013-2022 Shanghai Yixing Technology Co., Ltd. All Rights Reserved.

  • Skype.
  • E-mail
  • Whatsapp
  • Inquiry
Inquiry Us Now !
Inquiry Us Now !