Die pin stroke positioner
AssigneeMilacron LLC
InventorLynn M. Tore
Life of this patent
Estimating the term…
Abstract
The accumulator of an extrusion blow molding machine is constructed to include a stroke positioner that comprises inter-engaging, threaded components that enable the piston of the programming cylinder to be adjusted relative to the inner rod of the programming system in the accumulator assembly. Since the inner rod ultimately connects to the die pin, this adjustment directly determines the position at which the piston in the programming cylinder will close off the die gap. In particular, the components of the programming system can be adjusted so that the die gap is closed just as the piston of the programming cylinder reaches the limit of its stroke.
Claims2
An accumulator head comprising:
- a programming actuator having a piston linearly movable within a cylinder, the piston including an extended, cylindrical, outer adjustment rod,
- an annular outlet defined by die tooling, including a movable die pin,
- an inner adjustment rod having one end connected to the die pin and the opposite end received within and connected to the outer adjustment rod of the piston of the programming actuator, and
- stroke positioning means for connecting the inner adjustment rod to the piston in a manner that allows adjustment of the distance between the die pin and the piston, thereby positioning the die pin to close the annular outlet when the piston reaches a limit of its range of movement within the cylinder of the programming actuator, the stroke positioning means comprising a push-up nut adjustably attached to the end of the outer adjustment rod opposite the piston;
- a stationary collar attached to the end of the inner rod;
- and a pull-down nut attached to the push-up nut, such that movement of the push-up nut changes the position of the inner rod relative to the piston, and the stationary collar is trapped between the push-up nut and the pull-down nut when the accumulator is in operation.
Dependencies are inferred from the claim text.