SU771216A1 - Circular-knitting machine web expander - Google Patents

Description

one

The invention relates to the knitwear industry, in particular to the width of the web of the circular machine.

Known fabric spreader is circular in the enclosing machine, containing spreads placed one above the other, the upper of which is made in the form of a curvilinear frame and installed with the possibility of vertical 10 movement, and the lower one is made oval and consists of several parts mounted with the possibility of moving along the major axis of the oval, and the guide of the edges of the web 1 fixed under the straightenings 5 bodies.

However, the known spreader does not ensure the equality of the lengths of the hinge posts from the place of their formation to the pull rolls. A twisting of the line of looped rows leads to uneven tension of the web. Around the perimeter, and in the case of the manufacture of molar jersey, loops - which are held by the warp and weft, 25 deformation of the web occurs.

The purpose of the invention is to reduce the deformation of the web ..

The goal is achieved by the fact that in the spreader containing mounted one socket

over the other spreaders, the upper of which is made in the form of a curvilinear frame and mounted with the possibility of vertical movement, and the lower one is made oval and consists of several parts mounted with the possibility of moving along the small and large axis of the oval, and the upper edge of the web the straightener is made oval, while both straighteners have concave portions located symmetrically with respect to the major axis of the ovals in the contact zones of the straighteners at the folds of the web.

FIG. 1 shows the spreader, general view; in fig. 2 is a view along arrow A in FIG. one; in fig. 3 shows a section BB in FIG. one.

Claims (2)

The blade spreader contains one mounted one over another of the straighteners 1 and 2. The upper spreading device 1 is made in the form of an oval frame with concave sections 3 and 4 and is installed with the possibility of vertical translation by means of rods 5 attached to an intermediate ring 6, which provides the necessary rigidity of the oval frame. Vertical rods 7 are fixed to the intermediate ring 6, with the help of which, the ring 6 is fixed on the crosspiece with the possibility of vertical movement. The crosspiece is made in the form of a pipe 8, to which two crossbars 9 and 10 are attached. The required position of the oval frame is achieved by means of nuts P. The lower straightener 2 is made oval and consists of two convex portions 12, 13, the guide rods 14 and 15 of which are mounted with the possibility of moving into pipes 8 along the major axis 16 of the oval, and two concave sections 17 and 18, the guide rods 19 and 20 of which are mounted with the possibility of moving in pedestals 9 and 10 along the minor axis 21 of the oval and fixed in the desired position screws 22. Convex chastki 12 and 13 may be secured by screws (not shown) when the spreader is used for extension of the elastic webs. Sections 12 and 13 may have springs 23 and 24 located inside the pipe 8 and interacting at the ends (not shown) of the rods 14 and 15, if the spreader is used to spread the low growth of the knitted fabric. The perimeter of the lower stretcher 2 is equal to the perimeter of the web 25. The concave portions 3, 4 and 17, 18 of the two stretchers are located symmetrically to the major axis 16 of the latches in the contact areas of the flatteners 1 and 2 at the folds of the web 25. Under the flatteners 1 and 2, it is fixed with screws 26 on the crosspiece, a guide, made in the form of bent rods 27 and 28, at the ends of which there are bushings 29, serving to interact through the web 25 with the pull shafts 30 and 31 located under the guide. In the absence of a widening spindle, the largest distance from the looping zone 1 to the extension shafts 30 and 31 is the line B drawn through the middle of the web 25. As it approaches the edge of the web, the distance decreases, reaching a minimum angle of 75®. The principle of action is widespread following. When installing the spreading machine on the machine, the guide in the form of rods 27 and 28 of the edges of the web 25. is set so that the distance between them is equal to the width of the folded web. The concave sections 17 and 18 of the lower spreading device 2 and the upper spreading device 1 are positioned relative to the other and the needle cylinder 32 of the machine so that the middle of the concave sections are located on the B line. During operation of the machine, the web 25 is pulled away by the spreading devices 1 and 2, its edges are guided by the guide to pull shafts 30 and 31. Upper and lower straighteners 1 and 2 straighten the folds on the web 25 and straighten the line of looped rows. With the appropriate calculation of the sizes of the oval straighteners 1 and 2, the proposed spreader compensates for the length inequality from the zone of loop formation to the draw rolls 30 and 31 and maintains it with sufficient accuracy equal to the largest distance along the line B. For this middle of the concave parts 3, 4 and 17, 18, the upper and lower spreaders 1 and 2 should be placed along the line B, which is achieved by the corresponding location of the top spreader. 1 and concave arcs 17 and 18. The smallest diameters of the upper and lower straighteners 1 and 2 are proportional to the distance of these flatteners to pull shafts 30 and 31. The shape and dimensions of flatteners 1 and 2 are selected in such a way that the spatial lines along which the looped columns are located , were bulging. Under these conditions, the described spreader provides a straightening of the lines of looped rows of the web entering the pulling shafts, and ensures the alignment of the web pulling force along its perimeter and, if it is used for low stretch knitwear containing the main threads, alignment. Stitching the warp threads around the perimeter of the needle cylinder 32. Claims of the invention. The spreading wheel of the circular machine, containing one straightener mounted one above the other. the upper one of which is made in the form of a curviline; it is a single frame and is mounted with the possibility of vertical movement, while the lower one is made oval and consists of. from several parts mounted for movement along the small and large axis of the oval, and fixed to the ribbers by the edge of the canvas, characterized in that, in order to reduce the deformation of the canvas, the upper straightener is vprlnen oval, while both ravravitel have. concave sections , located symmetrically with respect to the major axis of the ovals in the zones of contact of the spreads in the folds of the web. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 575389, cl. D 04 B 15/88, 1976.