DE1960863U - DEVICE FOR THE CONTINUOUS MANUFACTURING OF THE INNER TUBULAR REINFORCED LAYER OF A FLEXIBLE HOSE MADE OF ELASTOMERAL MATERIAL. - Google Patents

Description

PATENTANWÄLTE DR.-ING. H. FlNCKE DIPL.-ING. H. BOHR DIPL.-ING. S. STAEGER

Fe r η r υ f: 224941

(* 266060)

10 = W / H c

F 2? 155 / 39a RA.172992-29.3.67 MUNICH 5, Müllerstrasse 31

? ΜΙ4ΐΡίί -5ISIiSf

PIRELLI Sooietl p @ f> Amlunl.

il

s flessibles

The M 3, £ @ h © KS

b © look at a © Si ©! ©

© Ine iriaeliSräglleli aiafgebraelit © Iesssf © foloiFfS:

us

f ₅ mm

ss »are. il @ g © sfSlMiIi ©! s sa

provided with a reinforcement *, which consists of 3 threads of ₈ yarns _s ribbons of textile · = · or metal material and. is suitably arranged ο Such hoses © © an inner © generally comprise tubular commanded light öes elastomer materials ine ₀ © © outer tubular layer of elastomeric material and an intermediate in the form SoMcM © iner gain <,

the manufacture of such a? Tubing is to perform various operations ₉ namely in the wesentlieken! Extruding the inner tubular Sehichtj the Aufbringest the gain to the inner layer and extruding 'of a tubular aweiten it at their so-amplified first layer

The production rate of .derartigen Sohläueheüj produced by extruding ^ depends won various faktorsn ah _v -under which are g@na.aat hatiptsäelalich?

a) Bie esri; rusion temperature ₉ di © lower than the volcano & ni = *

of the blastomer material must be ₀

b) The extrusion pressure _e der? / eg @ n the 'relatively high viscosity of the elastomer material'"at ä®r Eaetrusioas = temperature must be very high _o

For continuous and single production -won flexible

ans Blastomermaterial using a strengthening have become known © different methods based in wesentlichen.auf · folg® a separate manufacturing operations -di ^ © werdenβ embodied in various stations of the plant Such production process, the ₉ which spatially distributed Steep performed on versehie = * _B have however- the Iaehteil _? that they take a lot of money and that the system brings costs with it "

It has been determined that, w @ aa of the hose to be sided with a gain ₀ at least one layer of one or more helical components comprises _p is wound in a single direction with a small pitch, the Extrusloääsgesehwindigkeit SINOE by di © maximum possible rotational speed of the Spiralwindvorriciitiuig _s is limited which di © Rocken ₉ di © © the element of the reinforcing Tragea ₉ © around their own axis and 'ma the axis of the Sehlauehes sets in rotation. ₉ whereby this does not coincide o This is the case with a reinforcement _ß that other than © ines? or! aligned components has a layer which comprises one or more components wound in a spiral shape with a small pitch ₉ their Sangentea. instead of forming an angle between 75 and 90 ° with <i @ r sight line, this factor also had a negative influence on the speed of the continuous production of such hoses

RA.172 992 * 3/29/67

i © I

YcewisMms? ®ms ° © & da © ¥ @ s' @ iBiEMras; <ä © s

i @ © @ 2 £ teMd £ @ rt © 2i

^ © i ³ <& ®n AM. & LBMb®w <& $, © h <ä &%> Btiss © g «

with

ice cream

Fig «1 tie © Selt @ isaagi @ fet © iaei ³

Magsg @ s? I @ iTö © t @ ii & © w $ © n®nfo®m umü

Figo 3 · ®ίΆ <ΒΏ. Longitudinally> ühnltt diw © h dl © Düs ©

ö ©! ³

In with

Dl © ia FIg ₀ 1 illustrated © V © s? ^ I © tofeMßg iimfaasfe Iia

a first extruder 10 ₉ a spiral _{rotating device 11 9} which is arranged in the extruder _s a second extruder 12 and a pouring device 1%

Filled via in the first extruder 10 © GmnBEi passes öureh "the nozzle 14 thereof RNID takes a tubular © shape along the Eaumes _s d;. Dureh @p the inner surface of voröe · =" ren end 15 of the nozzle and the outer surface of the core is limited (see fig 2 bis'4 _o) "the core" is check within the nozzle 14: tand in this by means of suitable - 17 held in centered position bucket · spacers?

Inside the front end 15 of the & Düs 14 © © i aw οά @ © τ multiple threads 18 are introduced rad 1.8 ';, which directs the Läng "3g © @ si components of the gain to" form of the hose ₀

According to Pig _e 2, the "get two jades 18 and 18 'won speaking Toryatsrollen 19 and 19%, the" 20 ° fixed pin or by declaratory _s at 20 are rotatably _s in the ₅ wherein the As? JAE with the housing of the extruder 10 © Form in pieces »

The threads 18 ₉ 18 'pass through the wall of the nozzle 14 along the thread guides 21 or 21 ⁵ (Figo 3 and 4) ₉ dis inclined and open into the front end 15 of the nozzle ₀

In this catfish the threads 18 ₉ 18 'directly embedded in öen rubber of the Fora ο a tubular body adopted 22 ₉ and move with the same Gesenwi & dig · = ness such as the gums, wherein si © substantially in a longitu = dinalen position ₉ are held d _o h _e in a position pa rallel ~ • au a generatrix of the tubular body, "

Preferably, the threads are Läng ^ geriehteten 18 _S 18 'so that they will contact embedded ₉ 22 au forecast on the outer surface of the tubular member "

To achieve a uniform distribution d @ r läsigsgeriohteten components of Yerstärloing to achieve _9, it is required / ρ this to be so arranged that the axis of Sehlauches liegte in a hard "= moderate point position with respect to this

The core 16 is at the front end 15 of the nozzle 14 a certain TOr _9, as will be explained below ο

The rohrförinige rope _s where the aligned yarns 18 ₉ 18 "! Siad already embedded the gain 22 ₀ is the Estruder extruaieri" jedoeh over © ine certain length of the outside of the nozzle 14 noch'durch the projection 16 'of the core 16 gestütztj the has the same cross section as the projection (Figo 4) _o If during the extrusion ₉ cUho immediately

After exiting the nozzle 14 of the extruder, the tubular layer 22 made of rubber is "wound" with one or more spiral-shaped components for reinforcement.

According to 3? ± g _o 2, the spiral rotating device comprises winding the spiral component or components of the reinforcement a rotor and a Sats supply roll _a

The rotor 25 has a I 24 ₉ which is mounted on the nozzle 14 by means of ball bearing 25 and 26 and distributor ₉ are © 27s fixed 27 _'3' corresponding to the labe in a number of Vö'rratsrollen number _"0 Mg 2 geigt swei diametrically opposed A3? Iae _o D @ r rotor also includes © insn Ladenführungs? Ing 28 ₉ - which is firmly tied with the labe and whose axis coincides with the axis of the labe ₉ and a disk 29 to transmit the rotary movement _o The free ends of the two arms 2J _V 2? ⁸ are in the direction of the supply roll ^ .ge · = Icrünimt and wear pad guide rings 5O ₉ 50 ' _β

The two supply rolls 31 and 32 are mounted in coaxial flow on a hollow spindle 33 which is mounted in a self-supporting manner on a solid support 34 ₉ more in the direction of flow.

The thread 35 of the supply roll 31 and the thread 36 of the pre · =

Council roll 32 are means of the rotor in the form of two threads wound spirally in one direction onto the tubular layer applied

More specifically, the ^ Aede "be said deducted 35 and 3S of the eatspre" before ending supply rollers ^ 'which rotate only about their own axes ₉ continuously through the distribution arms 27 and 27 \ e "benfall8 rotate $ be retrieved and by corresponding thread guides 3O ₉ 50 ° and from there applied to the tubular layer that leaves the extruder and continues along the cavity of the spindle 33 "

In this way the rotating mass of each ought is as close as possible to the axis of rotation and accordingly it is siög => Lich _s reduce the total moment of inertia of the rollers in relation to the axis of the hose as much as possible ₉ which coincides with the axis of the spiral rotation ₉ and all other disadvantages that occur due to unavoidable eccentricities to be eliminated or reduced. These biases generate forces ₉ that cause vibrations ₉ TireloSie unacceptable with regard to the quality of the alignment and the mechanical resistance of the rotating system

In the illustrated in Figo 2 Spiraldrehvorriehtung is the rollers tragend® hollow spindle 33 fixed "The" two rollers are loose on di © spindle mounted by means of bearings 37 ₈ 38 _a 39 and 40 and arranged in such a ₉ that the Wieklungssina bathing each roller with the Rotation direction of the rotor matched

Due to the Rüekholwir tang "which is exerted by the-rotating prime poor the Päden 35 and% are ρ under nungv so that it due to its possible _p a rotary movement about their axes transferred au to the rollers ^ which runs in the same direction as the of the rotor and. whose speed is proportional to the speed of the spiral movement around the extruded tubular layer "

If desired, the hollow spindle can be rotatably mounted so that it rotates in the same sense around its own Aohs ©! Sann at the same speed as the rotor ₀ Ia in this case, the rotary movement on the hollow spindle is controlled by means of suitable bioreactions or via the Transferring the thread guide ring ₉ which is fixed with the spindle Yerbundsii sein kamu The resulting relative speed in the Besug on the rotor for each roll depends on the speed _p with which the spiral threads are wound on the extruded roll-shaped layer o

Eb is favorable under certain circumstances ₉ the two rollers loosely on the support pegs and to bring them in such a position ₉ that the direction of rotation of the components / with the "two rollers opposite direction of rotation of the rotor is rare.

The supporting hollow spindle _8, which is rotatably arranged j, rotates in the same direction and at the same speed as the rotor _o

The absolute speed of the pollen is lower than that of the rotor for a fabric according to the size © of the spiral windings _{0 applied to the tubular © layers}

The choice among these systems depends on the size of the reinforcement j, the blastomer material used, the nature of the elementary components of the reinforcement and other factors _£

The length of the gate jump 1β ⁹ "? Es core 16 depends on vöq. the ratio of the extrusion speed to the speed of rotation of the arms distributing the spiral threads «,

By increasing the extruder speed and keeping it constant the speed of rotation of the distributor arms for the application of the threads it will be necessary $, the length of the projection T6 ' due to the increasing gradient of the spiral currents except = »

heights _s is thus carried out, the threads on the extruäierte tubular © layer in a two movements of the combination of the "(forward movement of the extradierten tubular Sehioht and Drelibe <= movement of the rotor) dependent location on the extruded tubular film., which is becoming · on the Projection 16 'of the core 16 takes place »

The length of the projection 16 ^'1 is preferably between O ₅ 5 to 2 times larger than the diameter of the core ₉ so that di © residence time of the estruöierten layer on the projection is equal to, the time is _s, the snim applying © in or SWEi Spiralwia · = fertilization of the relevant component required. is _ö

The projection 16 ° of the core 16 may übergeheja in a konisehea rope 1β ^{0 (1} (see Figo 4) ₉ no longer sum Ä · = support of the advancing tubular layer serves _s to but a "special importance" in the separation the esc «= truded tubular layer from the protrusion has ₀

Components Pur the manufacture of a tube with a balanced Verstärkungsstrukturj the longitudinal components, and a single layer of one or more helical compo = · comprises _P in a Wlc & Lung useful wound sindg it is necessary ^ latter apply in such a manner that the tangent of the helix an angle between 75 and 90 ° in relation to the axis of the hose formed one such

= 13 =

Hose is in the German patent application P 26686/47 f · Tom _O 8 February 1966 by the same applicant described

? 3 ÜR the production © ines such a tube, it is necessary to use only ₉ © ine Spiraldrehvorricatung au _s which comprises one or more rollers ₉ axially relative to each other and to the - rohrförmig® just extruded layer are arranged, and the first to the extruder susammen is used"

The extruded tubular layer emerges from the extruder with longitudinal components of the reinforcement embedded in the mass from «

Palis a hose with a balanced reinforcement structure can be made SQlI ₅ , which comprise a straight line of concentric and superimposed layers or spiral-like components ₉ whereby adjacent layers are wound in crosswise superimposed spirals ₉ is required ₉ at least one pair of spiral turning devices see below use ,, The angle of the! Bangent of the spiral in relation to a direction parallel to the axis of the tube is even less than 75 _s but not less than 30 °. ₀

/ ■■■■

The application of crossed helical Sehiehten the extruäierte rohrförmig® layer was "at the protrusion of the nozzle core has happened, it is also possible to ₉ apply mutually opposite reinforcement layers upon application of a pair in a first layer of spiral turns ₉ in a einsigen direction _s run and in a second layer Spiralwi & öuxigen äufsubringeng which also run in one direction, but crossed with respect to that of the first layer »immediately before entering the second extruder j» because the © inner® tubular layer ₉ which is already reinforced with at least the first spiral _{layer 8} © ine = sufficient strength has, so that it without Mach part applying the sweitea. withstand layer kans. _o

Has for hoses with a balanced amplification ;, pairs crossed spiral layers ,, the Aa * entity is of longitudinal components of the gain · not wesentlieh ₉ to the reinforcing structure compensate ,,

The longitudinal reinforcement components, however, are an essential puncture in the method according to the invention. In the previously known methods, the threads wound spirally onto the extruded tubular layer under tension could remove the latter ₉ by causing incisions or the like ₉ during bsi ä®m

Method according to the invention these disadvantageous parts avoided
although it is possible to work with a higher Yorsehub speed and therefore with a higher swaying speed "so that noticeable thread tension occurs *,

In e3? Site2 ° line enables full support
the projection 16 ° of the core 16 ₉ that the not yet vulcanized extruded tubular layer retains its structure
and not any Qtietsoh = currency and üeforiaierungslcräften = wirä rend exposed to the application of the threads under Spanaung ₀

_{In addition, the longitudinal threads 9} introduced into the tubular layer during the extrusion prevent the
spirally wound threads'the wall of the tubular
Damage layer dd @ r even cut into it, _etc.

In order to avoid ^ that along the Yorsprunges 16 ° of the core 16
already extradierte tubular layer outside the nozzle of the extruder, any frictional forces zwisohen the emotion in each Be stationary surfaces ausgesetzt.wird _ft so large that they sind9 of the feed gleiohmäßigen
Impair their layer and deform it
¥ orrufezi. ₉ it is indicated ₅ the tubular® SCMcM mechanissh

The additional overcoming of the friction -thought. Another pull

hand, no deformities extradierten tubular layer cause} because in this embedded longitudinal threads 18 and 18, "the required stability of the dimensions of extru <»-founded product despite the Zugbeanapruehung during -ü & m pulling ensure _o

If it is necessary to compensate for the spiral-shaped component ea. Of the reinforcement with a similar spiral-shaped layer of opposite winding direction, the device can be equipped with a second spiral rotation device (not shown) ρ di @ is preferably arranged immediately in the direction of movement in front of the second extruder 12 (J? Ig _o - 1) _o

The one provided with a reinforcement and with uniform! ⁰ Before = · schubgesehwindigkeit esirtidierte tubular © layer is then passed to a second extruder 12 "of the ice äiiBer © tubular layer of rubber applied _o

G-emäß the Heuerung it is possible to _9, the spiral compo = * components of the gain at a high voltage apply _s so that the spiral turns close to the inner tubular layer a & liegeno means of such system calls the extrusion of the outer ^ daus rubber layer consisting no shift the spiral turns out _s even if the sehubgeschwindigkeit the product -längs the entire ago =

direction and therefore by dea. second extruder very high. is

Ia Pigo 1 is shown the puller · 13 ,, the SmRn VorwärtszJLehen dee -Schlauches serves ₀ In the same figure is also a cooling device 41 for the Sehlaucla inclined _v which S ₀ B ₀ a perforated ring guide rassfaßt _s tareli which is blown air; , and which are arranged in the direction of movement below the spiral turning devices. kaim _o

At the bath of the coating process ₉ siämlieh. the extrusion of the 'outer layer ■ röhrföriüiigen ,, \ fir & hose collected by conventional means and cured. _p what also according to per se'-known methods and with appropriate devices; can happen _e

Claims (1)

PATE NTAN WALTE DR.-ING. H. FINCKE DIPL.-I NG. H. BOHR DIPL.-ING. S. STAEGER Telephone: 22 49 41 (* 26 60 60) RÄ 172 992 * 29.3.67 MUNICH a, Müllersh-aße 31 F 27 ätlÜ ίί rait © 2stewä & © 3? Fe © äsnsief © amf © Iskssp H © Sil © pisid © l dmrn al® H © lalsplnd <§l (33) ft © tst © ht < la gl I ₈ dadai? © !! g © Ii © jajas @ i <§ta§t. i @ l © to @ t. «Teßh © lae Spi ^ aMfelwo ^ FleSii & iaiig C Ii) tar al © gl © £ © lia © hslg u @ silgst © ma "© lsi Paas * (Ii) PATENTANWKLTs OR.-ING. H. FINCKB DIPL-IN ©. H. BOHR DIPL-IM ©. 5. STA§ © ER