Position:China Plastic Machinery Network>Technical Symposium>Hole
From;  Author:Stand originally

1. notes model the feature of blemish
Be in easily transparent note model " air trap " inside see but also can appear in opaque plastic in.
This and ply are concerned, and because plastic systole leaves,often note model center and cause.

2. may appear the reason of the problem
(1) . The mould is not sufficient fill.
(2) . Stop those who banish a powerful person is abnormal move.
(3) . Plastic not complete and dry.
(4) . Beforehand model or inject rate are too rapid.
(5) . Certain and special material uses special equipment production.

3. remedies a method
(1) . Increase discharge makings amount.
(2) . Increase the pressure that note model.
(3) . Increase screw forward time.
(4) . Drop melt temperature.
(5) . Reduce or raise the rate that note model. (crystallize to be not for example body kind plastic want to add
Increase 45% rate) .
(6) . The examination stops to go against a powerful person to whether split or cannot be run.
(7) . Answer to improve dry condition according to plastic character, let plastic and complete dry.
(8) . Reduce screw appropriately rotate speed and increase back pressure, or lower inject rate.

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