top of page
SANKO GOSEI

Gas venting defect in cylindrical shape (1)

In resin molded products having a cylindrical shape, the gas at the tip of the cylindrical part could not be released, resulting in gas burning and weld lines.

        Resin:PA66+GF25 Weld lines are visible at the tip of the cylindrical part.  


At this time, a total of 36 gas vents were provided in the vertical direction on the product cylinder and on the mold side.


Factors that prevent gas venting despite the provision of gas vents include the following


①When the wall is thick with an unbalanced wallgas can easily accumulate (no escape route).

②If the resin contains glass fibers, etc., the fibers can easily clog the gas vent.

In other cases, gas venting may not work well due to product shape or molding conditions, such as when the filling is not balanced. In this case, we decided to review the gas venting once it was set in the vertical direction.



8 views0 comments

Recent Posts

See All

Comments

Rated 0 out of 5 stars.
No ratings yet

Add a rating

Concerns about plastics
Did you solve?

You can find the desired content from the
top page content from the top page.

23989485.png

★月間アクセスランキング★

bottom of page