DE1965260A1 - The structure and geometry of the fabric semifinished product can be changed by applying pressure to form support and / or damping constructions - Google Patents

Description

PATENT PIPE

By applying pressure in structure and geometry Changeable fabric semi-finished product for the formation of support and / or damping structures

Applicant: PÜTZER KuTCSTSTOi ¹ S ¹ TECHNIK GMBH & CO.

53 Bonn - Duisdorf Bahnhofstr.

Inventor: Oswald Landwehr 5309 Meckenheim

in the Ruhrfeld 21 a

109827/0826

The invention "relates to a fabric semi-finished product, characterized in that its structure and geometry can be changed by the application of pressure and, in the restructured state, represents a support and / or damping structure Additional flat or profiled hollow band inserts made of a flexible or a flexible and elastic material; - ä Hollow band inserts can be subjected to internal pressure, whereby they experience a cross-sectional enlargement The fabric warp threads are reoriented and, if necessary, pre-tensioned, the additional warp or weft threads running in the same direction on the hollow belt inserts are pressed against the threads running at right angles to them and result from this Fixed in increased frictional engagement against slipping.

Semi-finished fabric products are known

- in which the threads in the warp and weft direction and are equal in weight,

- in which the threads in the warp and weft directions are of the same material but differ in weight,

- in which the threads in the warp and weft directions are both material and weight different,

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8A ORIGINAL

- "in which the threads in the warp and / or weft direction consist of a flexible or a flexible and elastic material,

- in which the threads and / or strands are band-shaped or profiled in the warp and / or weft direction,

- In which the threads and / or strands in warp and / or Weft direction represent hollow structures in itself.

Also known are support and damping constructions made of fabric semi-finished products, such as

- that fabric semi-finished products are impregnated or coated in airtight manner and assembled into pressurized or multi-chamber systems are redesigned,

- That air-permeable fabric semi-finished products for single or multi-chamber systems be assembled and airtight, inflatable for the purpose of pressurization in the chambers Deposits are incorporated or brought in later,

- That a variety of self-contained, pressurizable Single-chamber systems made of fabric semi-finished products in a self-sealing design or with a sealing insert Layered next to each other flat and if necessary be connected to one another in a suitable manner.

In contrast, in the semi-finished fabric that is the subject of the invention, the airtight, pressurizable hollow band inserts as additional or exclusive warp or weft

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strands are an integral part of the tissue structure.

The semi-finished fabric is produced in a manner known per se by making warp and weft strands in linen or one of the other usual types of textile weave to form flat or tubular composite units.

In the basic variant of the pressurizable semi-finished fabric The warp strands consist partly or exclusively of pressurized hollow band inserts. The shot and Additional warp strands can be made from a wide variety of materials commonly used in textile trade, e.g. also from glass threads. The influence of the fabric tear resistance through the hollow band inserts has its maximum in the direction of these inserts, at right angles to this it is equal to zero.

In a modification of the described basic version, it is also ψ possible that not warp but the weft strands of the fabric semi-finished product consisting exclusively or partly of hollow pressurizable band deposits.

The change in geometry and structure of the semi-finished fabric to form a support and damping structure results from this the cross-sectional enlargement of the hollow band inserts with internal pressure beating. The increase in cross-section results in turn from the surface area caused by the application of internal pressure

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stabilization of the hollow banc! inserts to a geometry more symmetrical Wall stress distribution and / or from elastic or elastic and plastic expansions of the hollow band material as a result of an increase in tension in the wall of the hollow belt.

The fabric threads running at right angles to the hollow band inlays or strands are formed from their "sinusoidal" shape with a long wavelength when the cross-section of the deposits is enlarged and small amplitude into a course with a shortened wavelength and increased amplitude while the elongated one remains the same Restructured length of the wave run. For a flat semi-finished fabric, this means a reduction in the expansion of the semi-finished product across the hollow band inlays and an increase in the semi-finished product thickness. In the case of a tubular semi-finished product with an axially parallel In addition to increasing the hose wall thickness, the restructuring means a reduction in the course of the hollow band inserts its mean circumference.

As far as the characteristics of the hollow band material are not limiting affects the cross-sectional enlargement of the hollow band inserts when internal pressure is applied, is the maximum of the change the geometry of the semi-finished product is achieved when the fabric threads running at right angles to the hollow band inlays the contour of the inserts under internal pressure have adapted over the entire circumference and around the same form-fitting Form rings with symmetrical stress distribution.

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The absolute value of this "ring tension" is based on the pressure in the Inlays adjustable and must be adjusted to the maximum permissible stress the thread material must be matched.

Corresponding to the character of a woven semi-finished product, the intersection of the threads running at right angles to these deposits lies in the middle between two parallel adjacent deposits. In the case of pressurized fabric semi-finished products, such intersection points simultaneously form the points of greatest constriction in thickness. With certain support structures, periodically repeating thickness constrictions over both the width of the semi-finished product and the length of the semi-finished product are desirable. In a woven semifinished product of the type described so far, thickness constrictions along the pressurized inserts can be achieved in that the ^{threads running at right angles to the inserts "sinusoidal 11"} are locally gathered, that is, shortened and thereby the possible cross-sectional enlargement of the hollow band inserts is narrowed The thread shortening is matched to the desired thickness constriction.

Fabric semi-finished products of the variants described so far can be used as support and / or damping structures in the pressurized state be used. If the structure and geometry change of the semi-finished product due to the material characteristics of the Threads or strands running at right angles to the hollow band inlays are of a plastic nature, i.e. of a permanent nature, can optionally such a semi-finished product after printing once

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serve as a support or when the pressure is relieved again Damping construction are used.

Semifinished fabric products can also be wetted with a viscous bedding compound (eg synthetic resin) before or after the pressurization of the hollow band inlays, which "freezes" the semi-fabricated fabric in its restructured geometry by hardening with threads or strands that may be under tension. Here, the hollow band inlays can form a bond with the bedding material, ie they can become an integral part of the support structure and, for example, take on the function of a sealing "liner" in the semi-finished product channels. Is assigned solely to the task of restructuring the hollow band deposits, they may after completion of "freezing" of the s aufschlagung semi-finished geometry obtained after carrying out pressure relief as "lost cores" has no function in the channels of the support and / or Dampfungskonstruktionen remain suppressed * or optionally removed will.

With the drawings Fig. 1 to Fig. 13, the semi-finished fabric that is the subject of the invention, in different variants and State forms are explained. All figures show the semi-finished fabric in section, transversely to the axis of the hollow band inserts running in the warp direction. Figures 1 to 11 show plane, flat fabric semi-finished products, Figures 12 and 13 show tubular Semi-finished products.

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Fig. 1 shows a fabric semifinished product without pressurization, consisting from flat hollow band inserts 1 in the warp direction and from weft threads running "sinusoidally" at right angles thereto The circumference of the hollow band inlays corresponds approximately to the circumference of their sheathing formed by the weft threads. The width of the semi-finished fabric is equal to L, the height is equal to h, the pressure ρ in the hollow belt inserts corresponds to the ambient pressure.

FIG. 2 corresponds to FIG. 1, on which hollow band inserts 1 run however, on both sides and with these in the same direction, additional warp threads 3-

3 corresponds to FIGS. 1 and 2, the "sinusoidal" curve the weft threads 2 around the hollow tape inserts 1, however, have a geometrically similar course around the additional warp threads 3 superimposed.

Fig. 4 shows the fabric semifinished product from Fig. 1 in the pressurized state State. The pressure P in the hollow band inserts 1 is thus greater than the ambient pressure. With almost unchanged scope of the hollow band inserts 1 has its cross section compared to FIG. By the transition into a circular geometry with a symmetrical Wall stress distribution increased considerably. Compared to FIG. 1, this results in a semifinished product width reduced to 1 and a semi-finished product thickness increased to H.

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Fig. 5 corresponds to Figures 1 to 3> the same direction with the hollow band inserts 1 extending additional warp thread 3.1 are arranged between the hollow band inserts 1, and are like this "sinusoidal" of the weft threads 2 entwined. The width of the semi-finished product is equal to L ^, the semi-finished product thickness is the same

FIG. 6 shows the fabric semifinished product from FIG. 5 in the pressurized state. The remarks made in relation to FIG. 4 also apply, with Iy being used for the semifinished product width and H ^ for the semifinished product thickness.

Fig. 7 corresponds to Fig. 1, the circumference of an elastic However, the material existing hollow band inlays 1.1 is much smaller than the scope of its formed from the weft threads 2 Sheathing.

FIG. 8 shows the fabric semifinished product from FIG. 7 in the pressurized state State, although the cross-sectional enlargement of the hollow band inserts achieved by the pressure increase from ρ to P ^ i 1.1.1 as a result of elastic and / or plastic expansion of the wall material is not yet sufficient to bring the weft threads 2 into contact over the entire circumference of the hollow band inlays 1.1.1.

FIG. 9 shows the fabric semifinished product from FIGS. 7 and 8 after it has been reached the maximum of the cross-sectional enlargement of the hollow belt

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deposits 1.1.2. The weft threads 2 have adapted themselves over the entire circumference to the _{hollow band inserts which are under the internal pressure P 2} and around them form form-fitting rings with symmetrical stress distribution.

During the restructuring process of the semifinished product geometry: * from Fig. 7 to that of Fig. 9, the semifinished product width ^ / on L _{0 has increased} over l _{o Λ} in Pig. 8 continuously shortened to l _oo. The opposite tendency is shown by the semifinished product thickness from the initial value Iu, in Fig. 7 via Ho ^ in Fig. 8 to the maximum H _{2 2} in Fig. 9.

FIG. 10 shows the fabric semifinished product from FIG. 4 or FIG. 9; however, by shirring, ie shortening the weft threads 2.1 with the aid of auxiliary devices such as tension lever 4 and hold-down device 5, the possible increase in area of the hollow band inlays 1.1.3 is restricted. _{With the semifinished product width I 2 2} unchanged from FIG. 9, the semifinished product thickness in the region of the constriction is H ₂ ^.

FIG. 11 shows a semi-fabricated fabric according to FIG. 1, 4 or FIG. 9, which has been wetted with a viscous bedding compound 6 before or after the application of pressure to the hollow band inserts, which has "frozen" the semi-fabric in its restructured geometry by hardening. The after subsequent pressure relief collapsed in itself hollow band deposits 1.2 are still as lost cores without function in the channels of the support and / or attenuation construction 7 for example by double-sided adhesive bonding with cover layers for the construction of double scarf ene (sandwich)

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-Structures can be used.

Pig. 12 shows a fabric semifinished product corresponding to FIG. 1, but which is made as a seamless tube with the mean diameter D. has been made. The mean stretched hose circumference is equal to U, the hose thickness is equal to h ,.

FIG. 13 shows the fabric semifinished product from FIG. 12 in a pressurized state State. Analogously to FIG. 4, the mean extended circumference has decreased to u (the associated mean diameter is equal to d), the semi-finished product thickness increased to IL.

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Claims (5)

Claims 1. Semifinished fabric, characterized in that it is pressurized is changeable in structure and geometry and that exclusively as an integral part of the fabric structure or in addition flat or profiled hollow band inserts (1) made of a flexible or flexible and elastic one Material run in the warp or weft direction with Internal pressure (P) can be applied and experience a cross-sectional enlargement, whereby the right Angle to the hollow band inlays (1) "sinusoidally" running fabric weft or warp threads (2) reoriented and may be pretensioned and the additional ones running in the same direction on the hollow band inserts (1) Warp or weft threads (3) are pressed against the threads (2) running at right angles to them and through the therefrom resulting increased friction lock against slipping be fixed. 2. Semi-fabricated fabric according to claim 1, characterized in that the cross-sectional enlargement of the hollow band inserts (1) from the surface stabilization caused by the application of internal pressure the hollow band inserts (1) to a geometry of symmetrical wall stress distribution and / or from the elastic or elastic and plastic expansions of the hollow belt material as a result of an increase in stress in the hollow belt walls results. 109827/0825 8AD ORfGtNAL 3. Semi-fabricated fabric according to claims 1 and 2, characterized in that that along the pressurized hollow band inserts (1) thickness constrictions are achieved in that the threads (2) running "sinusoidally" at right angles to the hollow band inlays (1) are locally gathered, i.e. shortened and thereby the possible cross-sectional enlargement of the hollow band inserts (1) is narrowed (Fig. 10). 4-, fabric semi-finished product according to claims 1 to 3> characterized in that it represents a support or damping structure in the pressurized state and, provided the structure and Change in geometry of the semi-finished product as a result of the material characteristics at right angles to the hollow band inserts running threads or strands (2) of a plastic, i.e. permanent nature, if necessary after the application of pressure once a support or damping structure is retained even when the pressure is relieved again. 5. Semi-fabricated fabric according to claims 1 to 4-, characterized in that that it is before or after the pressurization of the Hollow tape inserts can be wetted with a viscous bedding compound (6) in such a way that the hardening of the bedding compound (6) results in the semi-fabricated fabric in its restructured geometry if the threads or strands are possibly under tension, it is "frozen" (Fig. 11). BAD ORiGlNAL 1098 2 7/0825