Return to forums
Register new account
Login:

Mclaren Power Forums: Excessive Shrinking - Mclaren Power Forums

Jump to content

Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

Excessive Shrinking

#1
User is offline   xysoom 

  • Advanced Member
  • PipPipPip
  • Group: Members
  • Posts: 6,007
  • Joined: 21-May 20
Excessive Shrinking

Remedies: Decreasing the barrel temperature allows the molecules and voids to expand and contract normally and provide consistent shrinkage values. Shrinkage is impossible to predict accurately, but keeping the material and mold temperatures at the right settings (as recommended by the material suppliers) will minimize the effective shrinkage.Get more news about Shrinkless Expanding Machine,you can vist our website!

◇ INSUFFICIENT INJECTION PRESSURE OR TIME

Remedies: Increase the amount of pressure or the time applied. Upon initial startup, the mold should be filled incrementally starting with intentional short shots (if the mold design allows) and progressively increasing pressure shot-by-shot until the mold is filled and packed properly. Then, parts should be inspected for critical dimensions. If the mold is new, and dimensions are incorrect, the mold should be returned to the moldmaker for adjustments. If the mold has already been in production and the dimensions are wrong, process parameters can be adjusted to make the part shrink less or more, whichever is required.

◇ INADEQUATE COOLING TIME
Remedies: Adjust the cooling time portion of the cycle. It is true that longer cycles make the part more expensive but there is a minimum amount of time required for the resin to form a proper skin. It depends on what material is being molded. A general rule-of-thumb for a part with a wall thickness of 0.100'', the cooling time should be 20 seconds. The overall cycle would then be 25-30 seconds.

◇ INSUFFICIENT CUSHION AND/OR HOLD TIME
Remedies: Maintain a cushion that is somewhere between 1/8'' and 1/4'' at the end of the injection stroke. This provides something against which hold pressure can be applied. The amount of time for holding pressure should be long enough for the gate to freeze, normally 3-4 seconds.

◇ EXCESSIVE NON-RETURN VALVE CLEARANCE
Remedies: Inspect the non-return valve mechanism and replace worn or damaged components. This wear is normal but is accelerated by molding materials that have reinforcements (such as glass) in them. The valve should be inspected at least every three months.
0

#2
User is offline   FrankJScott 

  • Advanced Member
  • PipPipPip
  • Group: Members
  • Posts: 1,896
  • Joined: 31-August 21
Why don't you Google it! before you post
0

#3
User is offline   FrankJScott 

  • Advanced Member
  • PipPipPip
  • Group: Members
  • Posts: 1,896
  • Joined: 31-August 21
Why don't you Google it! before you post
0

#4
User is offline   FrankJScott 

  • Advanced Member
  • PipPipPip
  • Group: Members
  • Posts: 1,896
  • Joined: 31-August 21
Untuk orang bertanya tentang daftar situs gacor 2023, daftar togel deposit pulsa, daftar agen judi resmi, situs judi terbaik di indonesia, permainan slot online terbaik, online slot gacor, slot terpercaya di dunia, situs judi slot online terbaik dan terpercaya no 1, situs slot terbaik indonesia, situs judi toto, situs terpercaya dan gacor, slot judi online terpercaya, deposit pulsa terpercaya, slot online deposit pulsa terpercaya, situs togel no 1 di indonesia, slot online terbaik, judi online slot terpercaya, situs judi slot gacor terpercaya, link agen slot, slot pragmatik online, Saya dapat menjamin ini artdaily.cc slot gacor for situs slot online indonesia terpercaya, rtp terpercaya, situs slot terbaik dan gacor, link bola slot, situs slot, judi toto slot, situs online slot terpercaya, pragmatic resmi, permainan slot online terbaik, dana slot gacor, slot 2023 gacor, situs slot gacor saat ini, judi slot gacor gampang menang, slot adalah judi, situs game slot gampang menang, agen slot terpercaya gacor, admin jarwo slot gacor, permainan slot yang gampang menang, link yang gacor hari ini, bermain togel online, also. See More New Situs Slot Gacor Website 622cf26
0

#5
User is offline   FrankJScott 

  • Advanced Member
  • PipPipPip
  • Group: Members
  • Posts: 1,896
  • Joined: 31-August 21
Kepada pria bertanya tentang slot www bola, situs togel dan slot terbaik, rtp togel slot, situs judi gacor, 1 situs, daftar togel onlin, togel resmi dunia, nama nama situs slot terbaik, slot terpercaya gampang menang, link togel onlin terpercaya, togel paling gacor, situs slot gacor dan togel, slot mudah gacor, agen slot online indonesia, slot gacor online pragmatic play, daftar link slot paling gacor, situs gacor, web slot terbaik, agen slot terpercaya deposit pulsa, daftar slot gacor dana, Saya dapat menjamin ini Djarumtoto for slot togel login, slot yang, daftar togel dan slot, slot online resmi, daftar slot gacor dana, slot slot online, daftar situs togel online, judi no togel, slot dana online, game slot yang gacor, permainan judi slot online, agen slot terpercaya indonesia, game togel slot, tempat togel terpercaya, slot toto gacor, situs slot judi, bola togel slot, daftar judi onlin terpercaya, situs gacor dana, situs ratu togel, also. See More Awesome Toto Togel Blog 93e32a9
0

Share this topic:


Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

1 User(s) are reading this topic
0 members, 1 guests, 0 anonymous users