IL29903A - Means for the withdrawal of fine wire from a reel - Google Patents

Description

MEANS FOR THE WITHDRAWAL OF FINE WIRE FROM A REEL the machine would present serious If the speed were to reach a certain then on starting up the drawing the tensile load on the wire section between the supply reel and the machine because of the inertia of the stationary reel would exceed the strength value prescribed the size of the wire so that the wire would In on stopping the the reel would continue to deliver for a considerable because the rotational mass is only slightly As a a corresponding length of wire would be unwound from the reel and this length no longer be dealt with by the drawing This material would form a tangled mass of which would initially prevent a starting up of the because this length of wire would have to be untangled by hand and wound on to the supply In order to avoid the disadvantages of the tangential drawal from the supply the overhead withdrawal has been proposed for these also with this method of supplying the wire which is to the manufacturing process could not initially completely without After starting up the drawing not only that ring of wire running of at that instant is detached from the convolution of the wire but also other turns of the outermost layer of convolutions are also The loose would be shifted one within so that their position on the reel would no longer correspond to the order in which they should run off one after the interruptions in the withdrawal of wire the supply reel would again occur and thereby the manufacturing process would be greatly With comparatively small reel dimensions and low withdrawal the said disadvantages of the overhead withdrawal could overcome by the arrangement fliers which are known the textile These devices make it possible to adjus required tension by means of a braking device in the wire whic is drawn In this the withdrawal of several of wire is prevented and a smooth unwinding of the the size of the reel and withdrawal speed it would no longer be possible in practice to effect a smooth withdrawal of the wire economically by the use of It has now been found that a satisfactory delivery of the wire from is ensured if a wire brake is arranged on the delivery According to the it is consequently that an annular element coaxial with the reel and having a round surface is fixed on that side of the reel delivery of the wire takes the internal diameter of said element being larger than the reel flange diameter and the element projecting at least in part over the delivery to the region radially above and that this side of the has arranged thereon a sleeve resistant produced from soft moulding which sleeve tightly encloses the annular element is externally of the The element with its holding means is preferabl constructed as a kind of spoked wheel and is connected b means of a screw s screwed through the reel core bottom part of the both with the reel body and also with the bottom The wire runs from the first of all Over the annular element then to the fine drawing hard of the ring surface over which the wire The wire is nipped and braked between the annular element and the sleeve tightly fitting externally on the A is established by the wire between delivery point from the reel the braking point between the annular element and the sleeve and the entry into the drawing wire itself is moved simultaneously in two The first direction of movement coincides with the wire The second movement occurs tangentially of the circumference of the annular and The braking of the wire between the annular element and the sleeve is so strongly to retard the second of the movements of the wire that the wire which is at any situated between the delivery point from the winding and the braking is tightly As a the uppermost convolutions of the wire assembly also remain tightly stretched until the instant when they are drawn off the No tangling of these convolutions can consequently occur and the smooth delivery of the wire from the supply reel is The elasticity of sleeve fitting tightly externally the annular element should preferably approximately that of a rubber for vehicle tyre inner since the sleeve is exposed to a high frictional stress because of the wire travelling at high the rubber material becomes worn too quickly and is therefore uneconomic in A material manufactured from soft PVC moulding compositions has proved very suitable as material for the such material corresponding to the data given in the plastics l6th page section It has the necessary for the does not show any ageing after having been in use a does not show any wear phenomena perceptible to the The construction of the delivery means is reference to the The Figure shows a side elevation of the said partly in The reel 2 with wire 3 is arranged on the frame The wire is drawn off from the package 3 in the direction of the reel flange towards the drawing delivery ring 6 projects over the flange until in the zone radially the package The ring 6 is held in its position the supporting arms which extend the middle section The annular element consisting of delivery ring the arms 7 and the middle section 8 is arranged on the reel 2 and is screwed with the latter the screw 5 on the main frame The holding device of the sleeve 9 is also fixed on the main frame 1 outside the range of the This means consists of the holding ring 11 and the support For strengthening a steel ring 10 is incorporated into upper rim of the sleeve It hears on the holding ring 11 and prevents the sleeve 9 slipping off over the ring For starting up the the reel is positioned on the main the annular element is on and these parts are fixed means of the screw 5 on the main frame The sleeve holder is then inverted over the parts which have screwed together and the sleeve is placed in The leading end the wire the package on the reel is drawn through the delivery ring 6 and the sleeve 9 and fed to the drawing The wire 13 running off the package is moved over the reel ference along conic of which the surface lines alter in the range between extreme positions and and also runs off the delivery ring along a conic to the drawing machine the position of the wire the lines and it can clearly recognised that the wire running the package does not come into contact with the delivery This guarantees a smooth delivery with maximum protection of the insufficientOCRQuality

Claims (1)

1. insufficientOCRQuality