US 4,544,108 A · Method for winding a thread on a bobbin and electro-hydraulic traverse motion device for carrying out the method

Abstract

A cylinder (3) has a piston rod (21) with a uniform diameter and is connected to a hydraulic tank (7) by way of a relay valve (4). A first end (27) of a piston rod (21) is directly coupled to a traverse rod (28) carrying a thread guide (29). A second end (31) of piston rod (21) is coupled to an iron core (32) of an inductive position sensor (5), which generates a signal (y) for the actual position of piston rod (21). A shaft (35) for a wound twist-yarn bobbin (37) is equipped with a tachometer generator (38), which generates a signal (v) proportional to the number of revolutions. Output signals (y,v) of position sensor (5) and tachometer generator (38) are applied to an electronic control device (6) which, in accordance with these signals (y,v) and other, digital, adjustable stroke parameters, supplies an analog control signal (s) to relay valve (4). Consequently, all winding functions can be achieved by means of a simple, position-adjusted linear drive and electrical preselection, such as winding angle, edge displacement, stroke shortening and disturbed patterning.

Claims13

Dependent claims

A method for winding a yarn or thread on a cylindrical or conical bobbin, comprising:

rotating a shaft operatively coupled to the bobbin;
reciprocating a hydraulically controlled traverse member having at least one thread guide thereon for feeding the yarn to the rotating bobbin;
generating an electrical guide signal in response to and proportional to the speed of the shaft;
generating a position signal depending on the position of a hydraulic piston means coupled to the traverse member for driving the traverse member;
setting monitoring switch means coupled to an electronic control means for controlling piston speed and piston stroke in response to the guide signal and position signal;
and
applying the guide signal and position signal to the electronic control means for generating a signal applied to the hydraulic means for regulating the piston speed and piston stroke.

4 more elements

An electro-hydraulic traverse motion device for winding yarn or thread on a cylindrical or conical bobbin, comprising:

a hydraulic reservoir (7);
a hydraulic cylinder (3) coupled to the reservoir and having a piston rod (21) with a first end (27) and a second end (31), each end of the piston rod extending from the ends of the cylinder;
a piston (22) mounted on the piston rod;
relay valve means (4) for regulating hydraulic pressure on each side of the piston within the cylinder;
a reciprocating traverse member (28) coupled to the first end of the piston rod;
at least one thread guide (29) mounted on the traverse member for feeding the yarn or thread to a bobbin;
an iron core (32) on the second end of the piston rod and an inductive position sensor means (5), said iron core displaceable within said sensor means for generating an electrical position signal (y) in response to displacement of said iron core;
a rotatable shaft (35) operatively coupled to a bobbin;
tachometer generator means (38) coupled to the shaft for generating an electrical speed signal (v) proportional to the speed of the shaft;
and
electronic control means (6) including control, selectable switch and computing means, said electronic control means for generating a control signal (s) to be applied to the relay valve means in response to said speed and position signals thereto;
whereby the piston (22) is displaced proportionally in response to the electrical signal (v) of the tachometer generator and reciprocates within a preselected stroke range for moving said traverse member and thread guide.

9 more elements

Dependencies are inferred from the claim text.

Method for winding a thread on a bobbin and electro-hydraulic traverse motion device for carrying out the method

Life of this patent

Method for winding a thread on a bobbin and electro-hydraulic traverse motion device for carrying out the method

Life of this patent

Abstract

Claims13