Container having a rim or other feature encapsulated by or formed from injection-molded material
View Patent ↗A tool and method for forming a container from a construct. The tool comprising a cavity for receiving a construct, a core operatively associated with the cavity and being operable to move into the cavity, an injection cavity for receiving injection-molding material and directing injection-molding material around at least a portion of the perimeter of the construct, and a clamping feature. The clamping feature is operatively connected to at least one of the cavity and the core and is for clamping a peripheral portion of the construct as the core moves into the cavity to form the construct into the container.
1. A tool for forming a container from a construct, the tool comprising:
a cavity for receiving a construct and the cavity having at least one sidewall for forming at least one sidewall of the container;
a core operatively associated with the cavity and being operable to move into the cavity to at least partially form the construct into a three-dimensional article having at least one sidewall and a flange extending from the at least one sidewall and extending around the perimeter of the three-dimensional article;
an injection cavity for receiving injection-molding material and directing injection-molding material around at least a portion of the perimeter of the three-dimensional article, the injection cavity comprising an advanced-flow section and a delayed-flow section, the advanced-flow section having a greater cross-sectional area than the delayed-flow section, and the advanced-flow section being located adjacent the at least one sidewall of the cavity, the injection cavity comprising a flange section extending across at least a portion of the advanced-flow section being operable to receive the flange of the three-dimensional article, the injection cavity extending around the perimeter of the cavity with the flange section and the advanced-flow section extending around the perimeter of the three-dimensional article;
a clamping feature operatively connected to at least one of the cavity and the core, the clamping feature being for clamping a peripheral portion of the construct as the core moves into the cavity to form the construct into the container; and
the clamping feature comprises a clamping ring and a draw ring for contact with the peripheral portion of the construct as the core is moved into the cavity, the clamping ring is operatively associated with one of the cavity and the core and is moveable relative to the one of the cavity and the core, the draw ring is operatively associated with the other of the cavity and the core and is movable relative to the other of the cavity and the core, the clamping ring has a clamping surface and the draw ring has a contact surface that is opposite the clamping surface, the clamping surface and the draw ring surface being positionable to hold the peripheral portion of the construct there between when the core moves into the cavity to form the container.
2. The tool of claim 1 wherein the cavity comprises a cavity base and the core comprises a core base, the clamping ring being operatively associated with one of the cavity base and the core base.
3. The tool of claim 2 wherein the clamping ring is operatively attached to the cavity base.
4. The tool of claim 3 wherein the draw ring is operatively associated with the core base.
5. The tool of claim 1 wherein the core comprises at least one articulated section movably received in the cavity, the articulated section being for initially gripping a central portion of the construct to hold the construct as the core is further moved into the cavity for forming the construct into the container.
6. The tool of claim 1 in combination with the construct, wherein the construct is a blank for being formed into a container.
7. The tool of claim 1 in combination with the construct, wherein the construct is a tray for being formed into a container.
8. The tool of claim 4 wherein the clamping ring is movable relative to the cavity base.
9. The tool of claim 8 wherein the draw ring is movable relative to the core base.
10. The tool of claim 1 wherein the contact surface and the clamping surface are adjacent the injection cavity.
11. The tool of claim 1 wherein the contact surface and the clamping surface are substantially parallel to at least a portion of the cavity surface.
12. The tool of claim 11 wherein the at least a portion of the cavity surface comprises an innermost portion that is for forming a bottom surface of the container formed from the construct.
13. The tool of claim 1 , wherein said delayed-flow section comprises a resin section, said resin section extending laterally from said flange section.
14. The tool of claim 1 , wherein the cavity comprises a shoulder at the top edge of the at least one sidewall of the cavity and extending around the perimeter of the cavity, the shoulder forms the lowermost portion of the advanced-flow section of the injection-molded cavity.
15. The tool of claim 1 , wherein the at least one sidewall of the cavity comprises at least three sidewalls and the cavity comprises at least two corners, each corner being located between respective adjacent sidewalls of the at least three sidewalls, the shoulder being at the top edge of the at least three sidewalls and the at least two corners and extending around the perimeter of the cavity.