How to choose the orientation of the runner gate of daily necessities mould?

2019-11-19

How do you know the orientation of the runner gate of the daily necessities mold ? Today, Xiaobian came to take you to understand:

There are many types of mold gates for daily necessities, but no matter what type of mold gate is used, the orientation of the mold gate has a great impact on the molding performance and molding quality of the plastic part. Therefore, reasonable selection of the opening position of the mold gate is an important design link for very high quality plastic parts. When selecting the orientation of the mold gate, the factors such as the movement of the molten plastic in the mold, the filling conditions, and the exhaust conditions should be analyzed according to the geometric characteristics and technical requirements of plastic manufacturing. The mold gate should be opened at a thicker section of the plastic part. When the wall thickness of the plastic part is greatly different, if the mold gate is opened in a thin wall, this is not only a large resistance to the movement of the plastic melt into the cavity, but also easy cooling, which affects the distance of the melt It is difficult to ensure that the entire cavity is filled. Wall thickness of plastic parts

It is often a place where the melt solidifies late. If the gate is opened in a thin wall, then the thick wall will form a surface depression or shrinkage due to the plastic melt shrinkage.

The size and orientation of the mold gate should be selected to avoid eruption and movement. If a small mold gate is facing a cavity with a large width and thickness, when the high-speed stream passes through the gate, due to the high shear stress, melt cracking such as eruption and activity will occur. Sometimes the phenomenon of spraying can also make the plastic parts form ripple marks.

The choice of the orientation of the mold gate should make the plastic flow shorter and the direction of the material flow less changed.

The orientation of the mold gate should be selected to facilitate the discharge of gas in the cavity.

The material flow should be prevented from deforming the cavity, core and insert.

The above on how to choose the orientation of the heater runner gate of daily necessities mold is introduced here, I hope to help everyone.

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