Platen die cutting monitoring system
AssigneeMead Westvaco Corporation
InventorsDenny Earl Davis, II, Edward Allan Weller
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Abstract
This invention relates to the monitoring of platen die cutting. Such structures of this type, generally, periodically examine the force profiles from a strain gage mounted near the platen die cutter mouth. This system measures not only the maximum forces developed, but also monitors other features of the loading curve, such as the paper-bursting point. Quality of cutting, as well as die wear, can be more readily assessed with this additional information and adjustments made to improve cutting results before the adverse effects show in visual inspections of the product.
Claims5
A method for monitoring the operation of a platen die cutter wherein said method comprises the steps of:
- measuring a strain of a platen die cutter during a cutting stroke;
- producing an electronic signal of said strain;
- conditioning said electronic signal of said strain to produce a waveform;
- time averaging said waveform of said conditioned signal;
- determining a paper burst strain peak and a counter plate strain peak from said waveform;
- determining the strain peak difference between said paper burst strain peak and said counter plate strain peak;
- and
- comparing said measured strain peak difference with an established strain peak difference threshold limit.
Dependencies are inferred from the claim text.