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US 6,802,704 B2Granted
Latching device for injection molds with removable inserts
AssigneeD-M-E Company
InventorsFrederick G. Steil, James O. Adas, Frank J. Eigler
Life of this patent
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AssigneeD-M-E Company
InventorsFrederick G. Steil, James O. Adas, Frank J. Eigler
Estimating the term…
A latching device (20) for a mold assembly (10) uses a cam action to hold the “A” side plate against the hot runner system/nozzle plate (18) during operation. Preferably, a latch (20) is provided on each side of the mold to effectively hold the “A” side plate against the nozzle plate (18) during the high pressure injection of plastic melt. For purposes of a mold insert change, each latch (20) is rotated to release the “A” side plate from the nozzle plate (18), and hold the “A” side plate against the “B” side plate. This enables the “A” (12) and “B” (14) portions of the mold assembly to be moved away from the nozzle plate (18), thereby avoiding interference of the hot runner nozzles and “A” side insert and enabling quick mold insert change.
A latching device (20) to facilitate removal or installation of replaceable cavity and core inserts in an injection mold assembly (10), characterized in that the latching device (20) comprises a latch arm 22 having opposed hooks 40,42 at one end and a pivot hole 44 at the other end, the pivot hole 44 of the latch arm 22 mounting on a center hub 24 that is rotatably attached to one side (12) of the mold assembly by means of an axial bore (56), the center hub 24 being configured so that the axial bore (56) is offset slightly with respect to the axis of a cylindrical bearing surface (46) that is received in the pivot hole 44 of the latch arm 22, such that this offset creates a camming action in the latching device 20 when the center hub 24 is rotated relative to the latch arm 22.
A method of changing cavity and core inserts of a mold assembly in an injection molding machine comprising the steps of:
Dependencies are inferred from the claim text.