DE102004022337B4 - Method for producing a protector for elongated objects - Google Patents

Abstract

The protective device for elongate objects takes the form of a woven hose which is impregnated with a mixture consisting essentially of polyurethane. Independent claims are also included for: (A) a method for producing the proposed protective device; (B) an application of the device for protection of electric cable assemblies, fuel lines, hydraulic hoses and the like.

Description

The The invention relates to a method for producing a protective device for elongated objects especially for hoses, harnesses and the like, especially in motor vehicles and the thus produced Contraption.

It is known, cables, harnesses, Pipelines and the like in motor vehicles with protective coverings to surround. These protective sheaths can perform a wide variety of tasks have, such. As rattle protection, protection against heat, protection against beating Loads, protection against frictional loads and protection against cutting or shear loads. Often meet protective sheaths or Protective sheathing also several of these functions. The protection against heat is For example, in the areas important in the heat-sensitive Cables or lines z. B. in the field of exhaust gas turbochargers or Engines with high heat become. The burden of beating and rubbing is for example in passages important in the body in which the cables are in other body parts, like doors be initiated. The protection against cutting or shearing Load is important where in the event of an accident due to deformation The bodywork can be expected to be the elongated object sheared or cut. This is especially problematic with fluid lines and with live cables.

From the WO 03042440 A2 is an elongated, corrugated knit hose known. In order to bring about the corrugation along the tube extension, the tube may alternately be knitted from relatively stiff and relatively flexible fiber parts. In addition, the mesh size and mesh density can be varied.

From the DE 69810964 T1 For example, there is known a woven tube for covering elongate articles, wherein there are orthogonally interlaced fillers and wrap elements arranged to extend circumferentially and longitudinally of the wrap, and wherein the chain elements or the fill elements are in the circumferential direction form extending alternating bands of relative flexibility separating inflexible bands.

From the EP 1 236 822 A1 a tubular protective device is known, in particular for cables of automobiles, which tubes are produced from a taped fabric, wherein the individual filaments should have diameters between 0.15 and 0.3 mm with a basis weight of 230 Tex to 2000 Tex. Furthermore, it may be provided to impregnate such a protective device with synthetic resin. In such tape-woven tubes is a disadvantage that it is a material which is not stretchable and thus is not adaptable to the contours of a wiring harness. Furthermore, the width is not flexible because different goods have to be woven for different widths.

knitting or braided hoses are used because they are flexible and expandable and themselves insofar as different contours of objects to be protected can be adapted. By correspondingly large Layer thicknesses leaves In addition, achieve a good shock and impact protection. For example it is known, braided hoses made of monofilaments of polyamide 6.6, which has these advantages exhibit.

One Disadvantage of this braided hoses However, that's when you're cutting or crop at the ends and fray or fray. It is therefore known in the art, such braided tubing with Hot cutting machines or hot scissors to cut, so that the plastic from which the braided hoses are made, liquefied in the area of the cut and the individual fibers adhere to each other after cooling. Of the Disadvantage here is that these hoses at the weld are no longer stretchy. This complicates the assembly, since the hoses at Sliding on to be protected The object does not move so well over the object to let. Another disadvantage is that when overstretching the hose mouth the welded Tearing open and it comes again to fraying or fraying.

task The invention is a method for producing a protective device for elongated objects to create, which ensures a good rattle and abrasion protection and also easy to install quickly and safely.

The Task is with a protective cover for elongated objects with the features of claim 1 solved. Advantageous developments are in dependent claims characterized.

It Another object is to provide the protection device.

The The object is achieved with the features of claim 6. advantageous Further developments are characterized in subclaims.

According to the invention is a Braided hose provided, which braided from mono- or multifilaments is, where the mono- or Multifilaments are intertwined individually or in braided strands.

Of the Hose has also over an impregnation based on polyurethane, whereby the impregnation based on polyurethane after knitting the hose is applied to the hose. After the application of the impregnation is the hose of a heat treatment subjected and after the heat treatment with a longitudinal slit Mistake. The following is the longitudinally slotted and heat treated Hose again with the impregnation Mistake. According to the invention is hereby the hose is guided so that the longitudinal edges overlap in particular 90 ° to Overlap 100 °. There is a renewed heat treatment whereby in this case a memory behavior of the tube with the overlapping longitudinal edges is achieved. This means that the hose according to the invention for example, at a widening at the hose around a object to be protected is beaten, the hose itself in the absence of expansion of itself again in an overlapping Position of the longitudinal edges curls. It is advantageous that the network already alone is relatively yielding and fits well with the contours of a protected Adapts object. Through the longitudinal slits and the mentioned memory effect, it is also possible the origin or the intersection of wire harnesses or other branching or partially expanding or thickening to be protected Protecting objects safely, taking Here, a convenient and easy installation is possible.

The Invention will be explained in more detail below.

One Braided hose according to the invention is woven from mono- or multifilaments, the mono- or multifilaments are woven individually or in braided strands.

The Multifilaments or monofilaments may consist of glass fiber threads and / or Aramid threads and / or Polyethenfäden and / or polypropene threads and metal filaments and / or polyester threads and / or polyamide threads be educated. Thus, you can the materials mentioned either alone or as blended textile filament to be available.

If glass threads are used, they can be formed from an E glass, D glass, from an R glass or an AR glass, preferably from an E glass. The glass filaments of the glass silk thread are preferably formed from an E glass with a density of, for example, σ = 2.6 g / m ³ . Such glass filaments have a softening point in the range between about 770 ° C and 990 ° C and E-glass filaments in particular at about 845 ° C. A heat resistance with otherwise unchanged material properties have glass filaments up to about 350 ° C and up to about 300 ° C (E-glass) and have up to temperatures of about 730 ° C or up to temperatures of 600 ° C (E-glass) no loss of Tear resistance properties. Such glass filaments have a relatively low thermal conductivity λ of about 0.8 to 1.2 W / mK, in particular 1.0 W / mK. The tensile strength of such glass fiber fibers is about 2500 mpa or 240 mpa (E-glass). Glass silk from the mentioned glass filaments is also fire-resistant and non-flammable. The glass filaments correspond, for example, to a specification 68 Detex 2.

The interlaced filaments which can be used consist of a plurality the threads mentioned, which are twisted together into a multifilament or monofilaments, the be braided together. Furthermore, monofilaments of various materials mentioned miteinan the co-braided become. Furthermore, you can also multifilaments of the same composition (eg PE + PP + PA) and / or different composition (eg multifilament 1: PE + PA; Multifilament 2: metal + aramid) intertwined become.

Prefers The hose is made of polyamide and / or polyester mono- or multifilaments educated.

The Filaments forming the mesh are braided cross-braided or spiral-braided.

One appropriately braided hose is then impregnated provided, wherein the impregnation brushed or sprayed on can be, or the braided hose is soaked in the impregnation. The impregnation according to the invention consists essentially of polyurethane.

Especially suitable is an impregnation the exclusively is made of polyurethane or of a mixture of essentially Polyurethane and / or latex and / or silicone and / or optionally further Elastormeren exists. The impregnation has a consistency which is preferably liquid and more preferably watery is fluid. A such low viscose impregnation penetrates the braided tube structure particularly well.

Prefers becomes the impregnation Applied by means of a spray head, wherein the braided hose in this case preferably in a cylindrical recess of the spray head so led will that during longitudinal passage of the braided hose by the spray head on or both sides of inside and / or outside the impregnation is applied to the hose and preferably penetrates the hose.

Subsequently, will the hose with the impregnation a heat treatment subjected, with the hose passed through a corresponding furnace and heat treated becomes. Preferably, the heat treatment takes place or drying in a vertical oven, so that the formation of impregnation accumulations is avoided by running out of the hose.

Of the According to the invention thus produced hose will follow with a longitudinal slit Mistake. As a result, the hose already has a first impregnation has, can such a longitudinal slits done without fraying the material. The invention impregnated hose reserves his knitted structure at.

Then goes through the Knitting hose another impregnation step. In this further impregnation becomes the longitudinally slotted braided hose so passed through the spray head and thereby forced, that the longitudinal edges overlap. The long edges of the braided hose can from 45 ° to if necessary, 360 ° overlap preferably 90 ° to Overlap 180 °. The so forcibly guided Braided hose is then opened the way already described a second time with the impregnation coated. It follows a further drying step preferably again in a vertical drying oven.

By the second impregnation is achieved that the braided hose a so-called memory effect has, that is for example, after the radial expansion of the tube around this a to be protected Object to lay, the hose jumps to its original the longitudinal edges overlapping Shape back, as soon as the expansion disappears.

Of the Diameter of the hose in the overlapping state of the longitudinal edges is self-evident chosen so that he is to the desired purpose, this means to the diameter of a protected Object is customized. The braided tube thus becomes braided from the outset made in diameter so big that the overlap considered is.

It has become more surprising Way out that a trained according to the invention braided hose with the impregnation according to the invention made of a mixture of essentially polyurethane causes that the hose in the mouth area or at the cutting edge does not fray or fray, its full Elasticity, he over the hose body but also owns in the estuary Has. Thus lets a hose according to the invention much easier to mount.

at the protective device according to the invention It is advantageous that these have a high cutting and penetration resistance results, by the impregnation according to the invention a fraying of the cutting edges does not take place and also a reduced necessary coverage for one Cut resistance brought about becomes. This leaves a hose according to the invention easier to assemble and is more stable as known hoses.

at with the braided hose according to the invention a longitudinal slit is an advantage that the hose material on the one hand very elastic and is compliant and aware of the external shape one to be protected Object adapts very well. Furthermore, it is advantageous that the Hose through the longitudinal slot very easy on the to be protected Arrange object, whereby by the memory effect and the jumping back of the hose in its original form with an overlap the longitudinal edges a safe protective effect is achieved.

Further let yourself the protection in the area of branches and the otherwise difficult accessible origins very example of harnesses much easier to achieve than with conventional wicker hoses and / or other protections. An on an object to be protected applied Braided hose according to the invention relaxes jumping back in the original one Shape through the elasticity on the one hand of the material and on the other hand of the entire hose the longitudinal rollover the edges move very well on an object to be protected without the longitudinal envelope rises.

Claims (11)

A method for producing a protector for elongated objects, characterized in that a braided tube is created, wherein the braided tube consists of mono- and / or multifilaments and the mono- and / or multifilaments of polyamide and or polyester and / or polypropene and / or polyethene and / or glass fibers and / or aramid fibers are formed, wherein the braided hose is provided with an impregnation of substantially polyurethane and the impregnation is subsequently dried, wherein after the drying of the braided hose is formed with a longitudinal slot, wherein the longitudinal slot below another Impregnation is carried out with substantially polyurethane, wherein after the further impregnation step, the impregnation is dried in a further drying step, wherein during the second impregnation step and / or the second drying step, the braided tube so constrained is that the longitudinal slot edges have a rollover or an overlap, wherein the second impregnation step and the second drying are performed so that the braided hose, upon bending and widening, develops an elastic restoring force such that the hose springs back to its original, edge-covering position. Protective device for elongated objects manufactured according to a method claim 1, wherein the protective device a braided hose and the braided hose is an impregnation from an impregnation mixture which consists essentially of polyurethane, with the protection device slit lengthwise is formed, wherein the longitudinal edges an overlap have. Protection device according to claim 2, characterized in that that the impregnation only made of polyurethane. Protective device according to claim 2 or 3, characterized characterized in that the impregnation Polyurethane and optionally Haftverminderern and / or adhesion promoters and / or Means for reducing static electricity and / or Metal particles exists. Protective device according to one of claims 2 to 4, characterized in that the impregnation in addition to polyurethane also contains latex and / or silicone and / or other elastomers. Protective device according to one of claims 2 to 5, characterized in that the longitudinal edges an overlap from 45 ° to Own 360 °. Protective device according to one of claims 2 to 6, characterized in that the longitudinal edges of an overlap from 90 ° to 180 °. Protective device according to one of claims 2 to 7, characterized in that the braided tube once impregnated and subsequently dried. Protective device according to one of claims 2 to 8, characterized in that the tube spiral, cross or round braided is. Protective device according to one of claims 2 to 9, characterized in that the impregnating solution of the hose before the Drying is low viscous and especially watery. Use of a protective device according to one of claims 2 to 10 and in particular a protective device with a The method of claim 1 has been prepared as a protective device for wiring harnesses, fuel lines, Hydraulic lines and the like.