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    • 6. 发明申请
    • High-Low System for Balers, Compactors and Transfer Station Compactors
    • US20220056914A1
    • 2022-02-24
    • US17498732
    • 2021-10-11
    • Anatoly Deninovich Lee
    • Anatoly Deninovich Lee
    • F04D13/12F04D15/00F15B15/20F15B1/04B30B15/00
    • The present invention provides an improved high-low hydraulic system for compacting machinery, such as balers, horizontal balers, compactors, transfer station compactors, and the like. The high-low hydraulic system comprises at least one double rotary pump, a plurality of directional control valves, a pilot-operated back pressure reducing valve, a flow control valve, a plurality of one-way valves, and a plurality of pressure switches. The high-low hydraulic system may be regenerative or non-regenerative and provides many advantages over conventional hydraulic systems. Such advantages include greater system efficiency due to a reduced back pressure during the time of the retraction stroke and clever flow sequencing, mitigation of hydraulic shocks at the beginning and end of compaction and retraction strokes, and reduced cycle time of the cylinder during operation due to the concurrent filling of the rod end side during decompression of the blind end side after the compaction stroke. Moreover, the present high-low hydraulic system allows for the cylinder to operate at three or more independent speeds. Additionally, the present high-low hydraulic system may also comprise an accumulator and pressure transducer that further assist with substantially maintaining a predetermined hydraulic pressure on the blind end side after the completion of the compaction stroke.
    • 9. 发明申请
    • METHODS OF OPERATING A STAMPING PRESS AND STAMPING PRESSES FOR OPERATION ACCORDING TO THE METHODS
    • US20210291474A1
    • 2021-09-23
    • US17260710
    • 2018-07-16
    • Bruderer AG
    • Ugo De SantisHerbert Högger
    • B30B15/14B30B15/02B30B15/00
    • The invention relates to a method for operating a stamping press (1) with a ram (2) which acts against a bolster plate (3), in particular a fixed bolster plate (3), and whose ram position relative to the bolster plate (3) can be adjusted in the intended use, wherein the ram (2) carries a first die part (4) and the bolster plate (3) carries a second die part (5), wherein the two die parts (4, 5) provide associated stop faces (6a, 7a) which, when the die is completely closed, form one or more fixed stops within the die for limiting the closing dimension of the die (4, 5). In accordance with a first method according to the invention, the distance (a, a1, a2, a3) between the two die parts (4, 5) or a parameter (b1, b2, b3, c) representing said distance is monitored at a certain point (P1, P2, P3) of the ram movement in which the die (4, 5) is not fully closed, and the ram movement is changed as a function of the monitoring result. In accordance with a second method according to the invention, at least one of the fixed stops is monitored for stop contact in the intended use of the stamping press, and the ram position is changed as a function of the monitoring result. With the methods according to the invention, energy-efficient and low-wear process control is possible also for dies (4, 5) with fixed stops, regardless of the skill and experience of the operator.