US 5,571,539 AGranted

Mold with an on-board counter or monitor

AssigneeD & L Incorporated

InventorGlenn Starkey

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Abstract

An injection plastic mold is provided with its own on-board monitor or counter, which is actuated with each opening and closing cycle of the mold to maintain a count of the operating cycles performed. This count is maintained with the mold, whether the mold is on the press or a storage rack. The counter or monitor is relatively inexpensive and unobtrusive and is capable of withstanding harsh temperatures and shock that are encountered in an injection molding environment. The counter or stroke monitor may be either a mechanical counter or an electrical counter which is incorporated into a mold half to remain with the mold when it is stored away from a molding machine, when operated during an initial set-up operation, and when operated during a production run. Whether an on-board mechanical counter or an on-board electrical counter, the counter is hermetically sealed against the intrusion of damaging liquids or chemicals and is mounted in a protective housing to protect against shock, etc. An actuating mechanism is associated with the counter with the counter and its actuating mechanism secured to one of the mold halves so that the actuating mechanism causes the counter to advance and register a count with each molding cycle.

Claims14

Dependent claims

A mold having moving portions and constructed for removal from a molding press for storage and for return to the same or another molding press and for storing on the mold itself the number of molding cycles for maintenance purposes, the mold comprising:

a mold body;
a first mold portion of the mold having a first cavity therein;
a second mold portion of the mold having a second cavity therein aligned with the first cavity to mold a plastic part in the first and second cavities when the first and second mold portions are in a closed position;
guide means on the mold body for guiding the first and second mold portions between the closed position to mold the part and an open position with mold portions and cavities spaced apart, the movement of the first and second mold portions between open and closed positions constituting a molding cycle;
a monitor comprising a counter mounted in the first mold portion at a position spaced from the mold cavity so as not to be engaged by the plastic and at a position on the mold for viewing the mold cycles when the mold is stored or in use;
said counter being carried by the mold when the mold is removed from the molding press and retaining the last molding cycle count when the mold is removed from the molding press and when the mold is returned to the same or a different molding press;
and
a counter actuator operable by the moving portions of the mold moving through a molding cycle to continue the previous count when the mold and counter are returned from storage to the molding press.

5 more elements

Dependencies are inferred from the claim text.