Opposed gating injection method

An injection molding process for forming molded plastic articles, comprising:

• providing an injection molder having a first stationary mold half having a first molding surface and a second movable mold half having a second molding surface wherein said molding surfaces are adapted to cooperate to form a plurality of mold cavities for forming a plurality of said molded plastic articles;
• relatively moving said first and second mold halves together along a first axis said mold cavities;
• injecting a first plastic material through said first mold half along said first axis or parallel to said first axis from a first injection means positioned in said first mold half into each mold cavity of a first group of said mold cavities;
• and
• injecting said first plastic material through said second mold half along said first axis or parallel to said first axis from a second injection means positioned in said second mold half into each mold cavity of a second group of said mold cavities.

An injection molding process for forming a molded multi-layered plastic article from a plurality of materials, comprising:

• providing an injection molder having a first stationary mold half with a first molding surface and a second movable mold half with a second molding surface wherein said molding surfaces are adapted to cooperate to form at least one mold cavity for forming said molded plastic article, said cavity having a peripheral edge region;
• relatively moving said first and second mold halves together along a first axis to form said mold cavity;
• injecting a first plastic material through said first mold half along said first axis or parallel to said first axis into said mold cavity through a first orifice from a first injection means positioned in said first mold half;
• injecting a second plastic material through said second mold half along said first axis or parallel to said first axis into said mold cavity while the first plastic material is still in the fluid state through a second orifice unconnected with said first orifice from a second injection means positioned in said second mold half, wherein said second material is different from said first material;
• and
• wherein said first and second plastic materials are At least partially sequentially injected into said cavity to form a multi-layered plastic article.