Automatic mold lock

Claim 2

A mold parting-line lock for use in hoisting and locking together two separable sections of a mold, comprising an anchor member adapted to engage one of the sections, a retainer member adapted to engage the other of the sections, locking means for locking said sections together, and hoist bolt means for hoisting the sections and automatically locking said locking means when the sections are hoisted by said hoist bolt means.

Claim 3

A lock as in claim 1, wherein said hoist bolt means is positionable to a first, hoisting position to lock said locking means and to a second position to unlock said locking means.

Claim 4

A lock as in claim 2, wherein said hoist bolt means is positionable to a third position to unlock said locking means.

Claim 5

A lock as in claim 3, wherein said second position is between said first and third positions.

Claim 6

A lock as in claim 1, further comprising means for preventing locking of said locking means when the sections are installed in a molding machine.

Claim 7

A lock as in claim 5, wherein said means for preventing locking comprises a movable element having one portion fOr cooperating with said locking means and a second portion for engaging a portion of the molding machine, whereby when said second portion engages the molding machine said movable element prevents locking of said locking means.

Claim 8

A lock as in claim 1, wherein said locking means includes a pivot pin, said anchor member and hoist bolt means having openings therein receiving said pivot pin, said retainer member having hook means for cooperating with said pivot pin to lock said members together.

Claim 9

A lock as in claim 7, further comprising a movable member for preventing locking of said locking means, said movable member being slidable in said anchor member and having one portion for engaging a molding machine and another portion for blocking movement of said pivot pin to a locking position.

Claim 10

A lock as in claim 8, wherein said openings in said anchor member are elongated, said movable member preventing movement of said pivot pin into portions of said elongated openings.

Claim 11

A lock as in claim 9, further including means for limiting the travel of said hoist bolt between a relatively vertical unlocked position and a relatively angular unlocked, intermediate position.

Claim 12

A lock as in claim 10, wherein said means for limiting the travel includes cooperating projections on said hoist bolt means and said anchor member.

Claim 13

A lock as in claim 10, wherein said hoist bolt means has cam surface means for causing said hoist bolt to fall in one direction to a locked position.

Claim 14

A lock as in claim 1, wherein said hoist bolt means is rotatably secured on said lock so that the relative position of said hoist bolt means can be altered.

Claim 15

A lock as in claim 13, wherein said retainer member is adapted to be secured to its associated mold section by a fastener, said retainer member being rotatable about said fastener and carrying said hoist bolt means.

Claim 16

A lock as in claim 14, further comprising a retainer sleeve carried on said retainer member, spring means for biasing said retainer sleeve in one direction, and cam means for moving said retainer sleeve in the opposite direction, said retainer sleeve being movable by one of said cam means and spring means for locking said sections together.

Claim 17

A lock as in claim 13, wherein said hoist bolt means is movable between a relatively vertical, locked, hoisting position and a relatively horizontal, unlocked position.

Claim 18

A lock as in claim 16 wherein said locking means comprises at least one sharpened point adapted to engage the other of the mold sections.

Claim 19

A lock as in claim 1, further comprising a pivot pin on which said hoist bolt means pivots and a fastener for securing one of said members to its associated mold section, said pivot pin preventing access to said fastener to make removal of said fastener difficult.

Claim 20

A mold parting-line lock for use in hoisting and locking together two separable sections of a mold, comprising an anchor member adapted to be secured to one of the sections by fastener means and having an elongated slot therein, a retainer member adapted to be secured to the other of the sections by second fastener means and having a hook thereon, a hoist bolt having a pivot pin movable in said elongated slot, said hoist being relatively movable with respect to said members to a hoisting position with said pivot pin engaging with said hook to lock said members together, and to a horizontal position with said pivot pin engaging with said hook to lock said members together said hoist bolt being movable to a position intermediate said hoisting position and said horizontal position with said pivot pin being out of engagement with said hook to unlock said members.

Claim 21

A mold parting-line lock for use in hoisting and locking together two separable sections of a mold, comprising an anchor member adapted to be secured to one of the sections by fastener means and having an elongated slot therein, a retainer member adapted to be secured to the other of the sections by second fastener means and having a hook thereon, a hoist bolt having a pivot pin movable in said elongated slot, said hoist being relatively movable with respect to said members to a hoisting position with said pivot pin engaging with said hook to lock said members together, and to a horizontal position with said pivot pin engaging with said hook to lock said members together said hoist bolt being movable to a position intermediate said hoisting position and said horizontal position with said pivot pin being out of engagement with said hook to unlock said members.

Claim 22

A lock as in claim 19, further comprising an elongated element movable in said anchor member to one position to prevent movement of said pivot pin into a locking position, said elongated element being adapted to be moved upon engagement with a portion of a molding machine, whereby locking of said lock is automatically pRevented whenever said lock and its associated mold sections are installed in a molding machine.

Claim 23

A lock as in claim 20, further comprising cooperating pin means on said hoist bolt and said anchor member for selectively preventing said hoist bolt falling from said hoisting position to said horizontal position, so that said lock is in its unlocked intermediate position immediately after hoisting.