Hot runner with variable pressrue drop
Publication Date: 2002-May-14
The IP.com Prior Art Database
This invention broadly relates to melt flow control in an injection molding system. In particular, this invention relates to an apparatus for use in a hot runner manifold melt channel for varying the pressure drop. The restriction is in the form of a translatable valve pin housed within the melt channel of the manifold melt channel. An advantage of this invention is that the melt is subjected to a relatively low shear rate increase, and thus less material degradation as the pressure drop occurs over a rather long melt channel length.