RU1816956C - Protective chain armour cloth from reinforced plastic - Google Patents

Abstract

The invention relates to a technology for the production of reinforced plastic products by winding and can be used to obtain a diverse in configuration chain mail cloth used as a protective mesh. A device for protecting a body is known comprising front and back layers consisting of sectors whose peripheral edges are adjacent to each other. However, such a device has a large mass and is difficult to manufacture and assemble. The essence of the invention lies in the fact that the proposed device of a protective chain mail cloth consists of a lightweight elastic frame, which is a plexus of U-shaped elements made by winding unidirectionally oriented reinforcing fibers coated with a synthetic polymer material. The spaces between the sides of the U-shaped elements are covered with protective covering elements made of plastics based on woven fillers and having the form of hollow cylinders, parallelepipeds or I-beams. Such a chain of mail has a low weight and high protective properties and can be used to protect the human body from being injured by falling, sticking out, flying and other objects. fe

Description

The invention relates to winding technology for manufacturing products from reinforced polymeric materials (APM) and can be used to produce a chain-mail fabric of various configurations used as a chain-link mesh.

The aim of the invention is to increase the protective properties and simplify manufacturing.

Fig. 1 shows an image of a U-shaped element with designations of rectilinear and arched sections, as well as ears; in Figs. 2 and 3, respectively, annular and box-shaped protective elements with the designation of the ends and cross-section with dimensions, as well as the chain-link assembly with one cut covering element and a U-shaped element cut in the area of the ears; figure 4 is a two-piece liner and a fragment of the canvas collected with it in section,

The numbers 1, 2, and 3 respectively indicate rectilinear and arched sections of the U-shaped element 4, as well as its ears. Position 5 denotes the end face of the annular 6, box-shaped 7 and I-beam 8 elements.

The invention is carried out as follows.

The protective chain mail cloth is made of interlocked

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and you ate

There are two types of shield elements, for the production of which automated winding methods can be applied. One of these elements has the shape of an elongated oval folded in the perpendicular plane with the letter U, and the other has an annular, box-shaped, or two-tee shape with calculated ratios of sizes. U-shaped elements form horizontal rows, interconnected by arched sections passing through the ears of the elements of the nearest series. The protective element of the second type is presented either as a closed hollow element covering one or more U-shaped elements, or in the form of a liner covering the space between the sides of the U-shaped element. A unidirectional TMA is wound onto a cylindrical mandrel of a design diameter, consisting of hard and high-strength filaments coated with thermosetting polymer binder. These ring blanks of the U-shaped element 4 are first subjected to preliminary heat treatment until the stickiness disappears. Then they are removed from the mandrel and, using their elastic state, they are formed into elements in the form of an elongated oval folded in the perpendicular plane with the letter U, and then finally solidify. In order to form the annular protective covering elements 6 onto a cylindrical mandrel of a calculated diameter, a woven TMA is wound in the form of a pipe, cured on the mandrel and only then removed from it and cut into individual elements. The diameter of the mandrel should be larger than the hypotenuse of the right triangle, the legs of which are equal to the sides of the U-shaped element S and B. The outer diameter of the protective element 6 is equal to the step t and t. The height Hi of the protective element 6 is equal to the height of the U-shaped element H minus 2 thicknesses of the arcuate sections of the U-shaped element. For the manufacture of box-shaped security elements 7, a woven TMA is wound on a square mandrel with the calculated side of the square, crimped on all sides under the press, and polymerized, followed by cutting into .Hi-length elements. The square side of the mandrel for the manufacture of the element 7 is approximately the size S of the doubled U-shaped element. The thickness of the box epheme 7 is approximately equal to half the gap between the sides of the U-shaped adjacent elements. The height of the element 7 is determined similarly to the height of the annular protective element 6.

8, this refers to a lightweight load-bearing frame and reinforced covering elements of a protective chain mail web. The canvas does not form

slots between its constituent elements. In a variant of the protective chain mail with protective elements in the form of an insert in the form of an I-beam 8, it is placed on top of the gap between the sides of the U-shaped element. The winding is carried out on a prismatic, cylindrical or combined mandrel, consisting of a prismatic and two cylindrical parts. The thickness of element 8 is equal to the distance between the sides of adjacent U-shaped elements. The distance between the flanges of the I-beam corresponds to the width of the side B of the U-shaped element. The size Ki of the shelf of the element 8 on the outside of the protective sheet is equal to the pitch t and t. The size K2 of the shelf on the inside for the purpose of lightening the web has been reduced to the size S of the U-shaped element. The height Hi, similar to the height of the box and ring elements, is equal to the height H of the U-shaped element minus 2 thicknesses of the arcuate sections.

Distinctive features of the invention: the formation of horizontal rows of LI-shaped elements interconnected by arched sections passing through the ears of the elements of the nearest series;

the arrangement of the female protective elements in such a way that their end planes are perpendicular to the surface they are covering;

production of protective elements annular, box-shaped or I-beam

forms with an estimated aspect ratio.

This helps to achieve the objective of the invention is to increase the protective ability of the chain mail cloth, simplification

manufacturing and assembly technologies. Such a protective fabric is lighter than similar structures made of metal and nonmetallic plates, easier to manufacture, and the use of winding methods makes it possible to automate the manufacturing process of manufacturing its constituent elements.

Claims (3)

SUMMARY OF THE INVENTION 1. Protective chain mail cloth made of reinforced plastic, consisting of a flexible mesh frame formed by interconnected elements, characterized in that, in order to increase the protective properties and simplify manufacture, it is formed of two types elements, the first of which are U-shaped and made from a blank of an elongated oval, and the second are in the form of hollow cylinders, covering adjacent U-shaped elements with the possibility of filling the mesh cell with protective inserts, while the U-shaped elements of one the rows are connected by arched sections through the ears of the elements of the same name in the lower row. 2. The canvas according to claim 1, characterized in that the protective elements are made in the form of small parallelepipeds of square cross section with the side of the inner square, equal to the length of the side of the U-shaped element. 3. Cloth according to claim 1. characterized in that the protective liners are in the form of an I-section in which the distance between the shelves is equal to the width of the side of the U-shaped element and the thickness is the distance between the sides of adjacent U-shaped elements, and the size of the outer the side is equal to the pitch, and the size of the inner shelf corresponds to the length of the side of the U-shaped element. Fie. 1 FIG. 2 Ј . n tg I PGO 7 Fig.  l se i