Manufacturing container or tube from paper; or other manufacturi – Container making – Rigid container
Patent
1986-09-05
1987-09-01
Hoag, Willard E.
Manufacturing container or tube from paper; or other manufacturi
Container making
Rigid container
425155, 425394, 425398, 425412, B29C 5120, B29C 5502
Patent
active
046906665
ABSTRACT:
A die set is provided for forming a multi-compartmented tray from sheet material. The die set includes a female die assembly formed to include at least two mold cavities and a drawing surface bounding said mold cavities, a first compartment-former for pressing sheet material into a selected mold cavity to form a compartment therein, a second compartment-former for pressing sheet material into the remaining mold cavities to form compartments therein, and a draw ring for holding sheet material against the drawing surface during movement of the first and second compartment-formers into their respective mold cavities. The first compartment-former includes a first die for pre-forming the comparment, a second die for finish-forming the compartment, and a projection system for moving the first die relative to the second die in a direction toward the cavity to a leading position. A control system is also provided for disabling the projection system at a predetermined position of the first die in the cavity to permit relative movement between the first and second dies during finish-forming of the tray compartment. Such relative movement allows the first die to relinquish its leading position as the second die finish-forms the tray compartment to relieve pressure applied to sheet material at a predetermined stage of each molding cycle so that sheet material is able to flow within the selected mold cavity during the drawing process.
REFERENCES:
patent: 4149841 (1979-04-01), Patterson
patent: 4246223 (1981-01-01), Patterson
patent: 4514353 (1985-04-01), Alexander et al.
Alexander Garold W.
Hyder Lonnie E.
Wright Robert V.
Champion International Corporation
Hoag Willard E.
Peerless Machine & Tool Corporation
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