Battery container mold

Claim 2

A mold for injection molding a battery container having bottom, side and end walls defining a compartment for housing the electrochemical innards of said battery, said container having a plurality of thin, resilient ribs integral with, and projecting at acute angles from, said end walls into said compartment for holding said innards substantially centrally of said compartment, said ribs each having a base portion at said bottom wall, said mold including female and core-bearing portions coacting in a mold-closed position to define a mold cavity corresponding to said container, said core-bearing portion including a mandrel having an exterior surface for shaping the internal surface of said compartment and means for stripping said container from said mandrel, said stripping means including: dovetail-like mortises in said mandrel, each mortise being defined in part by opposing side walls diverging from said surface of said mandrel at substantially said acute angle; substantially complementary-shaped ejector bars reciprocally slidable within said mortises, said ejector bars each being defined in part by opposing faces juxtaposed said mortise side walls and being adapted for movement between an extended container-release position and a retracted container-molding position; a recess in each of said faces defining a rib-forming cavity between said ejector bar and an associated mortise side wall while said ejector bar is in said retracted position; means joined to a first end of each of said ejector bars for moving said ejector bars between said retracted and extended positions such that said ejector bars travel with said ribs to free said ribs from said rib-forming cavity at the time said container is stripped from said mandrel; and a lip on the distal end of each of said ejector bars opposite said first end, said lip projecting from a said face toward the associated juxtaposed mortise side wall to provide an undercut in said base portion of each of said ribs.

Claim 3

A mold for injection molding a battery container having bottom, side and end walls defining a compartment for housing the electrochemical innards of said battery, said container having a plurality of thin, resilient ribs integral with, and projecting at acute angles from, said end walls into said compartment for holding said innards substantially centrally of said compartment, said ribs each having a base portion at said bottom wall, said mold including female and core-bearing portions coacting in a mold-closed position to define a mold cavity corresponding to said container, said core-bearing portion including a mandrel having an exterior surface for shaping the internal surface of said compartment and means for stripping said container from said mandrel, said stripping means including: dovetail-like mortises in said mandrel, each mortise being defined in part by opposing side walls diverging from said surface of said mandrel at substantially said acute angle; substantially complementary-shaped ejector bars reciprocally slidable within said mortises, said ejector bars each being defined in part by opposing faces juxtaposed said mortise side walls and being adapted for movement between an extended container-release position and a retracted container-molding position; a recess in each of said faces defining a rib-forming cavity between said ejector bar and an associated mortise side wall while said ejector bar is in said retracted position; means joined to a first end of each of said ejector bars for moving said ejector bars between said retracted and extended positions such that said ejector bars travel with said ribs to free said ribs from said rib-forming cavity at the time said container is stripped from said mandrel; and a lip on the distal end of each of said ejector bars opposite said first end, said lip projecting from a said face toward, and to within about 0.2 mm or less of, the associated juxtaposed mortise side wall such that each of said ribs is molded substantially detached from said bottom wall.

Claim 4

A mold for injection molding a battery container having bottom, side and end walls defining a compartment for housing the electrochemical innards of said battery, said container having a plurality of thin, resilient ribs integral with, and projecting at acute angles from, said end walls into said compartment for holding said innards substantially centrally of said compartment, said ribs each having a base portion at said bottom wall, said mold including female and core-bearing portions coacting in a mold-closed position to define a mold cavity corresponding to said container, said core-bearing portion including a mandrel having an exterior surface for shaping the internal surface of said compartment and means for stripping said container from said mandrel, said stripping means including: dovetail-like mortises in said mandrel, each mortise being defined in part by opposing side walls diverging from said surface of said mandrel at substantially said acute angle; substantially complementary-shaped ejector bars reciprocally slidable within said mortises, said ejector bars each being defined in part by opposing faces juxtaposed said mortise side walls and being adapted for movement between an extended container-release position and a retracted container-molding position; a recess in each of said faces defining a rib-forming cavity between said ejector bar and an associated mortise side wall while said ejector bar is in said retracted position; means joined to a first end of each of said ejector bars for moving said ejector bars between said retracted and extended positions such that said ejector bars travel with said ribs to free said ribs from said rib-forming cavity at the time said container is stripped from said mandrel; and a lip on the distal end of each of said ejector bars opposite said first end, said lip projecting from a said face toward, and to within about 0.2 mm or less of, the associated juxtaposed mortise side wall such that each of said ribs is molded substantially detached from said bottom wall.

Claim 5

A mold for injection molding a battery container having bottom, side and end walls defining a compartment for housing the electrochemical innards of said battery, said container having a plurality of thin, resilient ribs integral with, and projecting at acute angles from, said end walls into said compartment for holding said innards substantially centrally of said compartment, said ribs each having a base portion at said bottom wall, said mold including female and core-bearing portions coacting in a mold-closed position to define a mold cavity corresponding to said container, said core-bearing portion including a mandrel having an exterior surface for shaping the internal surface of said compartment and means for stripping said container from said mandrel, said stripping means including: dovetail-like mortises in said mandrel, each mortise being defined in part by opposing side walls diverging from said surface of said mandrel at substantially said acute angle; substantially complementary-shaped ejector bars reciprocally slidable within said mortises, said ejector bars each being defined in part by opposing faces juxtaposed said mortise side walls and being adapted for movement between an extended container-release position and a retracted container-molding position; a recess in each of said faces defining a rib-forming cavity between said ejector bar and an associated mortise side wall while said ejector bar is in said retracted position; means joined to a first end of each of said ejector bars for moving said ejector bars between said retracted and extended positions such that said ejector bars travel with said ribs to free said ribs from said rib-forming cavity at the time said container is stripped from said mandrel; a lip on the distal end of each of said ejector bars opposite said first end, said lip projecting from a said face sufficiently toward the associated juxtaposed mortise side wall as to mold each of said ribs substantially detached from said bottom wall; and an inclined ramp-like surface on each of said lips facing said recess and serving to facilitate deflection of said ribs out of interference with said lips when said container is stripped from said mandrel.

Claim 6

A mold for injection molding a battery container having bottom, side and end walls defining a compartment for housing the electrochemical innards of said battery, said container having a plurality of thin, resilient ribs integral with, and projecting at acute angles from, said end walls into said compartment for holding said innards substantially centrally of said compartment, said ribs each having a base portion at said bottom wall, said mold including female and core-bearing portions coacting in a mold-closed position to define a mold cavity corresponding to said container, said core-bearing portion including a mandrel having an exterior surface for shaping the internal surface of said compartment and means for stripping said container from said mandrel, said stripping means including: dovetail-like mortises in said mandrel, each mortise being defined in part by opposing side walls diverging from said surface of said mandrel at substantially said acute angle; substantially complementary-shaped ejector bars reciprocally slidable within said mortises, said ejector bars each being defined in part by opposing faces juxtaposed said mortise side walls and being adapted for movement between an extended container-release position and a retracted container-molding position; a recess in each of said faces defining a rib-forming cavity between said ejector bar and an associated mortise side wall while said ejector bar is in said retracted position; means joined to a first end of each of said ejector bars for moving said ejector bars between said retracted and extended positions such that said ejector bars travel with said ribs to free said ribs from said rib-forming cavity at the time said container is stripped from said mandrel; a lip on the distal end of each of said ejector bars opposite said first end, said lip projecting from a said face sufficiently toward the associated juxtaposed mortise side wall as to mold each of said ribs substantially detached from said bottom wall; and an inclined ramp-like surface on each of said lips facing said recess and serving to facilitate deflection of said ribs out of interference with said lips when said container is stripped from said mandrel.

Claim 7

A mold for injection molding a battery container having bottom, side and end walls and at least one partition parallel to said end walls and dividing said container into at least two compartments for housing the electrochemical innards of said battery, said container having a plurality of thin, resilient ribs integral with, and projecting at acute angles from, said partition and end walls into said compartments for holding said innards substantially centrally of said compartments, said ribs each having a base portion at said bottom wall, said mold including female and core-bearing portions coacting in a mold-closed position to define a mold cavity corresponding to said container, said core-bearing portion including a plurality of mandrels each having an exterior surface for shaping the internal surface of an associated compartment and means for stripping said container from said mandrels, said stripping means including: a plurality of mortises in said mandrels, each mortise being defined in part by at least one wall angling inward from said mandrel surface at substantially said acute angle; substantially complementary-shaped ejector bars reciprocally slidable within said mortises, said ejector bars each being defined in part by at least one face juxtaposed said mortise side wall and being adapted for movement between an extended container-release position and a retracted container-molding position; a recess in said face of each of said bars defining a rib-forming cavity between said ejector bar and an associated mortise wall while said ejector bar is in said retracted position; means joined to a first end of each of said ejector bars for moving said ejector bars between said retracted and extended positions such that said ejector bars travel with said ribs to free said ribs from said rib-forming cavity at the time said container is stripped from said mandrel; and a lip on the distal end of each of said ejector bars opposite said first end, said lip projecting from said face toward the associated juxtaposed mortise side wall to provide an undercut in said base portion of each of said ribs.

Claim 8

A mold for injection molding a battery container having bottom, side and end walls and at least one partition parallel to said end walls and dividing said container into at least two compartments for housing the electrochemical innards of said battery, said container having a plurality of thin, resilient ribs integral with, and projecting at acute angles from, said partition and end walls into said compartments for holding said innards substantially centrally of said compartments, said ribs each having a base portion at said bottom wall, said mold including female and core-bearing portions coacting in a mold-closed position to define a mold cavity corresponding to said container, said core-bearing portion including a plurality of mandrels each having an exterior surface for shaping the internal surface of an associated compartment and means for stripping said container from said mandrels, said stripping means including: a plurality of mortises in said mandrels, each mortise being defined in part by at least one wall angling inward from said mandrel surface at substantially said acute angle; substantially complementary-shaped ejector bars reciprocally slidable within said mortises, said ejector bars each being defined in part by at least one face juxtaposed said mortise side wall and being adapted for movement between an extended container-release position and a retracted container-molding position; a recess in said face of each of said bars defining a rib-forming cavity between said ejector bar and an associated mortise wall while said ejector bar is in said retracted position; means joined to a first end of each of said ejector bars for moving said ejector bars between said retracted and extended positions such that said ejector bars travel with said ribs to free said ribs from said rib-forming cavity at the time said container is stripped from said mandrel; and a lip on the distal end of each of said ejector bars opposite said first end, said lip projecting from said face toward the associated juxtaposed mortise side wall to provide an undercut in said base portion of each of said ribs.

Claim 9

A mold for injection molding a battery container having bottom, side and end walls defining a compartment for housing the electrochemical innards of said battery, said container having a plurality of thin, resilient ribs integral with, and projecting at acute angles from, said end walls into said compartment for holding said innards substantially centrally of said compartment, said ribs each having a base portion at said bottom wall, said mold including female and core-bearing portions coacting in a mold-closed position to define a mold cavity corresponding to said container, said core-bearing portion including a mandrel having an exterior surface for shaping the internal surface of said compartment and means for stripping said container from said mandrel, said stripping means including: a plurality of mortises in said mandrel, each mortise being defined in part by at least one wall angling inward from said surface of said mandrel at substantially said acute angle; substantially complementary-shaped ejector bars reciprocally slidable within said mortises, said ejector bars each being defined in part by at least one face juxtaposed said mortise side wall and being adapted for movement between an extended container-release position and a retracted container-molding position; a recess in said face of each of said bars defining a rib-forming cavity between said ejector bar and an associated mortise side wall while said ejector bar is in said retracted position; means joined to a first end of each of said ejector bars for moving said ejector bars between said retracted and extended positions such that said ejector bars travel with said ribs to free said ribs from said rib-forming cavity at the time said container is stripped from said mandrel; and a lip on the distal end of each of said ejector bars opposite said first end, said lip projecting from a said face toward the associated juxtaposed mortise side wall to provide an undercut in said base portion of each of said ribs.

Claim 10

A mold for injection molding a battery container having bottom, side and end walls defining a compartment for housing the electrochemical innards of said battery, said container having a plurality of thin, resilient ribs integral with, and projecting at acute angles from, said end walls into said compartment for holding said innards substantially centrally of said compartment, said ribs each having a base portion at said bottom wall, said mold including female and core-bearing portions coacting in a mold-closed position to define a mold cavity corresponding to said container, said core-bearing portion including a mandrel having an exterior surface for shaping the internal surface of said compartment and means for stripping said container from said mandrel, said stripping means including: a plurality of mortises in said mandrel, each mortise being defined in part by at least one wall angling inward from said surface of said mandrel at substantially said acute angle; substantially complementary-shaped ejector bars reciprocally slidable within said mortises, said ejector bars each being defined in part by at least one face juxtaposed said mortise side wall and being adapted for movement between an extended container-release position and a retracted container-molding position; a recess in said face of each of said bars defining a rib-forming cavity between said ejector bar and an associated mortise side wall while said ejector bar is in said retracted position; means joined to a first end of each of said ejector bars for moving said ejector bars between said retracted and extended positions such that said ejector bars travel with said ribs to free said ribs from said rib-forming cavity at the time said container is stripped from said mandrel; and a lip on the distal end of each of said ejector bars opposite said first end, said lip projecting from a said face toward the associated juxtaposed mortise side wall to provide an undercut in said base portion of each of said ribs.