Abstract: A co-injection nozzle is disclosed that includes a combining means configured to reduce shear heating and create a more even shear heating profile in core and skin material flow streams. The combining means is configured to reduce shear heating peaks and valleys in core and skin material flow streams as the streams flow between annular channels of the combining means during a mold filling process.

Abstract: Methods and systems for co-injection molding multilayer articles having one or more molded apertures disposed between a gate region and a peripheral region of the article are disclosed. The articles include an interior layer disposed between an inner layer and an outer layer. An article has interior layer coverage over at least 98% of a perimeter of a cross-section of the article downstream of the one or more molded apertures. A method includes modifying fluid flowing past an aperture-forming region of a mold cavity to compensate for the drag of the aperture-forming region on the velocity of the fluid flowing proximal to the aperture-forming region.

Abstract: A container may comprise a spout, a base portion, and an ovular sidewall extending away from the base portion to the spout. The ovular sidewall comprises a vertical portion, a top transition region, and a top region extending from the top transition region to the spout. The top region comprises at least two discrete linear sections having different slopes between the top transition region and the spout. Moreover, the base portion of the container defines a support surface on which the container rests, a base channel extending across the diameter of the container, and an inset concave panel aligned with a center of the container. The container additionally comprises a handle portion defining a complex-curved face surface interrupting the top transition region and the top region, and a handle extending from a bottom portion of the face surface to a top portion of the face surface.

Abstract: Methods and systems for co-extruding multiple polymeric material flow streams into a mold cavity to produce a molded plastic article having an injection-formed aperture in gate region of the article are disclosed herein. A method includes providing a valve pin having a distal portion with a first diameter and a mid-portion with a second diameter smaller than the first diameter and providing a mold defining a cavity corresponding to a shape of a resulting molded plastic article. The mold has a recess aligned with a gate region of the mold, extending into the mold and configured to receive the distal portion of the valve pin when the distal portion of the valve pin extends beyond the gate region.

Abstract: Plastic container (110), including a side wall (120) and a flexible portion (132) of a base (130). The flexible portion of the base deflects when the sealed plastic container experiences a differential pressure. The deflection of the flexible portion of the base acts to change the internal volume of the container and thereby reduce the differential pressure. The container is a retortable container. The container may be injection-molded with inner and outer plastic layers (460,462) and a core layer (464) between the inner and outer plastic layers.

Abstract: Various embodiments are directed to a container comprising: a spout, a base portion, and a plurality of alternating long sidewalls and short sidewalls extending away from the base portion to the spout. The plurality of alternating long sidewalls and short sidewalls collectively define a vertical portion extending away from the base portion, a downward sloping planar top portion extending away from the spout, and a gradually curved transition region extending between the vertical portion and the downward sloping planar top portion. The container comprises a strength protrusion surrounding the spout and defined within the downward sloping planar top portion and one or more vertical grooves defined within at least one of the long sidewalls or the short sidewalls.

Abstract: A container may comprise a spout, a base portion, and an ovular sidewall extending away from the base portion to the spout. The ovular sidewall comprises a vertical portion, a top transition region, and a top region extending from the top transition region to the spout. The top region comprises at least two discrete linear sections having different slopes between the top transition region and the spout. Moreover, the base portion of the container defines a support surface on which the container rests, a base channel extending across the diameter of the container, and an inset concave panel aligned with a center of the container. The container additionally comprises a handle portion defining a complex-curved face surface interrupting the top transition region and the top region, and a handle extending from a bottom portion of the face surface to a top portion of the face surface.

Abstract: Disclosed herein are methods and systems for co-extruding multiple polymeric material flow streams into a mold cavity to produce a molded plastic article. At least one interior core stream of a first polymeric material is surrounded by inner and outer streams of at least one other polymeric material. The interior core stream serves as an interior layer of a resultant molded plastic article while the inner and outer streams serve as inner and outer layers, respectively, of the resultant plastic article. The interior core stream is selectively directed to flow into or past a downstream branch channel in a mold cavity. The downstream branch channel branches from a primary channel in the mold cavity at a branch junction. The branch channel defines a protrusion portion of the resultant molded plastic article.

Abstract: Methods and systems for co-extruding multiple polymeric material flow streams into a mold having a plurality of cavities to produce a plurality of multi-layer polymeric articles each having a consistent coverage of an interior core layer are disclosed herein. In an example method, a flow rate of a first skin material into a cavity is individually controlled for each cavity before initiation of co-injection of a second core material into the cavity, which may address inconsistent interior core layer coverage for articles from different cavities.