Method for controlling screwing spindle

A control method, piston technology, applied in the direction of bottle filling, packaging, screw caps, etc., can solve the problem of damage to the cap or the neck of the package
CN1105676CInactive Publication Date: 2003-04-16SERAC GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SERAC GROUP
Publication Date
2003-04-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention concerns a method for controlling a screwing spindle comprising a motor supplied with fluid and having a motor element (18) coupled with the spindle shaft (5) to drive it in rotation, the method comprising the step of supplying the screwing spindle in nominal pressure conditions and flow rate generating the required tightening torque, and a prior step during which the screwing spindle is supplied in conditions less than the nominal conditions in sufficient proportion for the screwing spindle to rotate at a speed generating kinetic energy producing a tightening torque less than the required tightening torque.
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Description

technical field

[0001] The present invention relates to a method of threading shaft control for screwing caps onto packages with threaded necks. Background technique

[0002] As is well known, the screw-in shaft has a linear transmission mechanism with a piston connected to a spindle for rotation. One method commonly used to control such shafts involves subjecting the piston to a tightening differential pressure, thereby producing the required torque for tightening the cap on the neck of the package. A problem arises from the fact that when the cap is initially screwed on, there is less friction between the cap and the neck so that the shaft turns with little resistance. As a result, high rotational speeds are available to the spindle, which stores considerable kinetic energy due to its inertia. The kinetic energy stored in this way causes the cap to be tightened rapidly until it bottoms out, at which point the spindle is stopped abruptly. At a standstill, the stored kine...

Claims

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