CS216296B1 - Distributing cylinder for making the winding - Google Patents

Description

SUMMARY OF THE INVENTION The present invention provides for the construction of a winding roll with yard counter-directional screw grooves, in particular for cross-winding devices for chemical fibers. The screw grooves at the opposite ends of the distributor cylinder are interconnected by a curve-shaped head groove which has the most advantageous properties in terms of the change in direction of the feed movement and its characteristics such as speed, acceleration, pulse and fiber residence time.

[0006] From German Patent Specifications 2,005,610 and German Patent Specifications 2,040,479, circle-shaped tipping grooves are known, and FR-2 241 832 in the form of a parabola is known. The characteristics of the sliding movement along these grooves of known shape were investigated and, in addition, along the grooves, they were unused and unknown in the form of hyperbola, ellipse and hyperbolometric curve.

The findings of this investigation characterize the sliding movement in the area of the dead center groove induced by the rotation of the roller, in that when moving from the screw to the deadline, the sliding movement at the contact point suddenly changes the shifting velocity expressed as shifting acceleration. constantly, changing over the entire curve.

As a consequence of the previously known shapes of the return curves, the force effect of the fiber runner on the wound fiber is manifested by tearing of the fiber at the contact points of the alcohol and at the top of the dead center groove.

Depending on the shapes of the headland grooves, the time required to change the direction of the feed movement, which is the fiber residence time in the dead center, depends on the size of the coordinate y _{c of the} contact point of the considered headland curve with the screw.

For equally large coordinates x _{c of the} contact points and the same slope y ' _c at the contact points of the previously known and used shapes of the return grooves, in particular in the form of a circle, the coordinates of the contact points y _{c are of} very large values. the circle and in the shape of a hyperbolic curve reaches the greatest value, which in turn indicates the greatest residence time of the fiber in the dead center and its unwanted accumulation at the edges of the winding.

As a result of the uneven acceleration in the headland groove, in addition to poor quality winding of the fiber, the headland groove running through it is uneven. This causes a short service life of the cylinder and the wire.

The above drawbacks are overcome by a winding roll according to the invention with two mutually opposed helical grooves on the opposite sides of the valoos connected to each other in the form of a curve satisfying the relation y = A arccos (1 - -), where y, x are 'the curve in the yax direction, x _c is the coordinate of the contact point on the curve in the x-axis direction,

A is the curve constant.

It is an advantage of the invention that in the contact point of the helical groove curve with a screw, it has zero acceleration of the sliding movement in the direction of the axis of the cylinder and maximum acceleration of the sliding movement at the top of the curve. The change in the sliding motion by continuously accelerating the velocity from the zero value of the acceleration at the contact points between the groove return curve and the screw is created.

Claims (2)

SUBJECT A winding roller, in particular a cross-winding of fibers, with two oppositely directed helical grooves on opposite sides of the roller connected to each other by the grooves in the curve curve iv, characterized in that the curve (11) of the grooving groove (15) satisfies y = A arccos - -), ra up to the maximum sliding movement at the top of the return groove curve and vice versa. For the same contact point x _c coordinate and the same y ' _c at the contact points as for the circle and the hyperbolometric curve, the contact point y _c coordinate on the guide roll curve according to the invention achieves the smallest value, which means the dead center area and consequently at least the accumulation of fiber at the edges of the winding. In the attached drawing of FIG. 1 is a cross-sectional distribution roll with two opposing grooves, and FIG. 2 shows a headland groove with a helical groove in the deployed shape bounded by the x-axis. In FIG. 1 shows a guide roller 10 according to the invention with screw grooves 16 having a left and right inclination direction symmetrical to the plane passing through the axle of the shoe cylinder 10 to a plane perpendicular to the axis of the cylinder 10. The thread grooves 16 are connected curve 11 at the contact points 12, from where the curve 11 continues to the apex 14 of the curve 11 and then follows the screw 13 with the opposite direction of the slope. The number of pitches of the screw 13 can be any and is limited by design conditions. In FIG. 2 shows the dead center area with a portion of the worm 13 in the deployed shape so that the apex. 14 of the curve 11 lay at the zero point of the orthogonal axis of the coordinates y and x. The contact point 12 of the worm 13 with the curve 11 is dimensioned by the coordinates y _c and _c x. OF THE INVENTION wherein yax is the coordinates of the point on the curve (11) in the x and y directions, x _c is the coordinate of the touch point (12) on the curve (11) with the worm (13) in the x-axis direction and A is the curve constant.