SU1390057A1 - Method and apparatus for producing variable-section shells - Google Patents

Abstract

The invention relates to the processing of composite materials by the method of winding and can be used in various sectors of the national economy in the manufacture of shells of complex shape. The purpose of the invention is the expansion of technological capabilities and quality improvement.

Description

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products. To do this, when forming a nonwoven tape by winding transverse yarns with longitudinal threads, the length of the longitudinal threads is changed by winding the restrictor with a profile corresponding to the perimeter of the mandrel section. In this case, loops are formed on both sides of the transverse threads. A device for making shells of complex shape contains a mandrel 1, a wrapper 4 with bobbins 5, a means of feeding 3 longitudinal threads,

one

The invention relates to the processing of composite materials by the method of winding and can be used in various sectors of the national economy in the manufacture of shells of complex shape.

The purpose of the invention is to expand technological capabilities and improve the quality of products.

FIG. 1 shows a general view of devices for winding products of a complex profile of non-woven tape, top view; in fig. 2 - laying the material on the mandrel.

A device for winding shells of a composite profile made of non-woven composite foam material contains a mandrel with pins 2, means 3 for feeding transverse threads, a wrapper 4 with bobbins 5 longitudinal threads, in the opening of which a mechanism is installed for changing the length of longitudinal threads in the form of two parallel endless tapes 6 made of elastic material of variable thickness, the extreme branches of these tapes 6 form restrictive profile surfaces for winding longitudinal threads. The wrapper 4 is driven in rotation by the actuator 7.

The method of manufacturing shells of complex shape is carried out in the following manner.

Cross threads with feed means 3, passing over profile tapes, are fastened on pins 2, op 90057

endless ribbons 6 variable thickness. The longitudinal threads are wrapped around two profiled bands, the curvature of the outer edges of which provides uniform tension on the longitudinal threads on the surfaces of the product. The use of guides in the form of two longitudinal ribbons with different curvature allows to expand the range of manufactured products and improve their quality. 1 hp f-ly, 2 ill.

racks 1. Then the mandrel 1 is rotated and, at the same time, the rotation of the wrapper 4 is turned on

and rollers 8. As a result, the profile belts 6J set in the zone of forming the longitudinal threads are set in motion. Longitudinal threads unwinding from spools 5

at the turn of the winding machine 4, they turn the profile tapes 6 along the profile of the outer branches. Due to the profile of the belts 6 and their rotation towards each other, a change in the length of the longitudinal threads occurs. The profile tapes 6 have a synchronous movement of the external branches of the profile tapes directed towards the mandrel 1, by such an arrangement of varying the width of the tape, the transverse threads are laid without changing their position on the pins 2 of the mandrel 1 during winding, and the longitudinal winding on the tapes 6, go with them

when turning from the outside to the inside of the device, forming on both sides of the transverse threads loops into which these transverse threads slide when being laid on the mandrel

5I is drawn out and fixed around the neck of the non-pole holes. Tape 6 as close to the mandrel when mounting the device. The profile of the tapes 6 is chosen in accordance with the shape of the product being wound, so that the width along their outer branches m is equal to the width of the nonwoven tape, and

Claims (2)

Claim 1. A method of manufacturing shells of variable cross section, including the supply of transverse threads, their winding with longitudinal threads with the formation of a non-woven tape, changing its width depending on the configuration of the product and its subsequent laying on a rotating mandrel, characterized in that, in order to expand technological capabilities and increase product quality, nye transverse filaments are laid on the mandrel constant in zone ¹ clearly nonpole holes and the length of the longitudinal filaments with iz5 vary according to the length of the perimeter of each molded Radia nogo-section of the mandrel by winding on their profile limiter to form a two belt 10 .storon yetel beyond the transverse threads. 2. A device for the manufacture of shells of variable cross section, including a rotating mandrel, means 15 for supplying transverse threads, an annular orbital expander and means for changing the width of the tape, characterized in that, in order to expand technological capabilities and improve the quality of the product, the means for changing the width of the tape are made in in the form of two endless ribbons of variable thickness parallel to the opening of the orbital expander, the distance between which corresponds to the length of the perimeter of the formed radial section mandrel Ia. Fi g 2