DE2437840A1 - METHOD AND DEVICE FOR FORMING A HOSE - Google Patents

Description

Hamburg, July 30, 1974 163074 .1320 PIB

Priority: August 6, 1973, U.S.A., Pat. 385 956

Applicant;

Caterpillar Tractor Co.
Peoria, 111. USA

Method and device for forming a tube

The invention relates to a method and a device for forming a tube bzui. a tubular Product on a core and relates in particular to such a method and a device in which the Hose in two halves using a suction air or Vacuum work step is formed.

The US-PS 3,606,921 (Grautey) describes a novel,

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oval pneumatic tubular tire. Such a tire is generally designed so that an oval, ring-shaped Hose part made of an elastomeric material on a dissolvable or shatterable core that is formed around the a ring-shaped hose part an inextensible Vaden is wrapped, and that other layers of material iuerden applied, to form the final tubular. The core is then shattered or disintegrated and from within removed from the tubular tire.

In the manufacture of such a tire described in the cited patent, a suitable molding of the oval, ring-shaped tube part on the breakable core in preparation for winding with a thread or Fiber material of particular importance. The procedure and the facility to carry out this procedure should of course, be as simple and effective as possible, especially considering the fact that the The core used can be extremely delicate and large.

Zuiar has found it to be comparatively useful and »effective has been shown to form a tube by wrapping tape around a core, but it is understandable that this winding is a relatively time-consuming process and carried out with extraordinary care must be prepared in order to prepare a suitable surface to wind on this wire »Even if this working

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Process is carried out with great care the impressions of the overlaps that result from the overlap of the wound tape material are an obstacle to correct wire wrapping. It is therefore clear that a smooth surface on which the Wire to be coiled is preferable.

The invention aims to provide a method and a device for forming an elastomeric tube on a core, which in effect enables the tube formed on the core to be relatively smooth Has outer surface.

The invention also aims to provide a method and a device that meets these requirements and also provides practicality and handling allow and can be used, υτι an elastoTieren hose effectively and in the appropriate Way to train, and which at the same time with simple Construction can be used quickly and effectively.

A method of forming a tubular member on a core according to the invention generally comprises the steps that an elastomeric material in one adjacent to the core Position is brought, and that a pressure differential or a differential pressure between one facing the core Area of the elastomeric material and one of the core

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facing away from the surface of the elastomeric material, to place the elastomeric material on the core.

A device for forming a piece of tubing from elastomeric Web material on a core comprises according to the invention Means for supporting the core, means for guiding the elastomeric sheet material into the correct position adjacent to the core bring and support, and means for applying a pressure differential between that sent to the nucleus and that of the Core facing side of the cock made of elastomeric material.

In a preferred embodiment of the invention uiird for Forming an elastomeric tube on a rin.jfömigan Core applying a negative pressure to one side of a web of elastomeric material in order to pull the web towards the core, so that part of the web of material is deposited on the core will. This laying of the web is according to the invention controlled that the core up etu / a to its circumferential median plane occupied or overlaid, and that the excess elastomeric material is cut from the core. The core and the elastomeric material placed on it are then vice versa, and a second section of the web is elastomeric Material is applied to the core so that it has the first applied part along the inner and the Outer circumference of the core continuously overlaps. The excess material from the second web section is then

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cut off, so that on the core an elastomeric Material formed hose remains.

Further advantages and features of the invention result from the claims as well as from the description below and the drawing in which the invention is explained and illustrated by way of example. Show it:

Fig. 1 is a side view of an inventive

Wet device for illustration forming part of a tube on a core,

I-ig. 2 is seen in the direction of arrows II-II

View of the device according to FIG. 1,

FIG. 3 shows a view corresponding to FIG. 1

to illustrate the formation of the other half of the tube on the core,

Fig. 4 is an enlarged cross section of a

ziuei halves molded on a core Hose and

5 is a view corresponding to FIGS. 1 and 3

to illustrate a tube formed on a core Rolling process.

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Fig. 1 shows an annular sand core 10, which on Support means 12 rests, for example from a row there are spaced-apart support blocks, the concave surfaces of which are each adapted to the core shape. the Support means can also consist of an annular part, which supports the core on its full 360 circumference. The support means 12 sit on a circular Plate 14, by a holding or "'ijf ^ SpannvTrrichtu.i] worn and attached to a power device. is ,, which serves · the core 10, the support means 12 and the Raise and lower plate 14.

In the position shown in FIGS. 1 and 3 of the individual parts, a cylindrical ring 16 is arranged around the outer circumference of the core 10 and at a distance therefrom. This ring 16 is attached to an annular base plate 18. The plate 14 rests on an annular seal 2C fastened along the inner circumference of the annular plate 1B. A ting plate 22 is attached to its outer circumference, with which it touches the ring 16, and projects inwardly from this ring. A disk 24 is supported with the aid of support rods 25 above the plate 14 and is fastened to it. The ring plate 22 and the disk 24 have several through openings 26. If the Ksn 10 urtd the plates are in the position shown, the ring plate 22 and the disk 24 are in the u / ssenili shan in the circumferential central plane of the ring core 10 » In this position

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bj ^r, the outer peripheral line i-idet the core 10 near the inner edge of the Hin ^ jlatta 22 and the 3u3ere edge of the disk 24 is close to the inner circumferential line of the core 1D. '

In preparation for forming a part of a hose on the core 10, a length of vulcanized elastomeric daisy material 28, for example rubber, is pulled off a roller 30 and brought into such a position along a flange part 32 defined by the ring 15 opening one now through the Bahnahschnitt 23, rl gh jyl ^; nuris "^h;"'^ i ^ Q 16, the base plate 18, the seal 20 and the plate 14 abgenr 3η ;: ^L , ° r. Ka ^ r.er 33. pleated and sealed uiird. The flange part 32 of the zy-'l ^ irischGH ring 16 serves to bring the track section of the elastic material 28 into the correct position. : α "i,

The track section held in this way is thus generally brought into a stall along and parallel to the initial central plane of the core 10. When the rubber is peeled off from the roller 10, a separating layer 34, which separates the rubber layers on the jialze 30, is removed and wound onto a take-off or take- up reel 36. The spool 35 can be driven using a slip clutch assembly with a spring or ainei Ό-tcr to hold the cream 34 taut without jarring a. f ^: jr that

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Tearing web 34 to apply sufficient force.

At this point it is necessary to remove air from one of the the chamber 33 connected Wakuumleitung 38 a negative pressure generated to pressurize the web 28 with a pressure differential. This means that a negative pressure is applied to the side of the web 28 facing the core 10 and that of the core 10 opposite side of the web 28 is exposed to atmospheric pressure. This pressure difference u / ird the at the through the Ring 16 limited flange portion 32 adhesive web 28 stretched and pulled down so that part of the web 29 on the Core 10 is applied. The disc 24 and the ring plate limit the area of the core 10 on which the layer is placed, so that the placed material is slightly below the circumferential center plane of the core 10 continuously along the inner and outer perimeter of the Kernes extend. .

The core 10 can advantageously consist of a porous material, so that the negative pressure through the porous core up the web material 28 placed on the core 10 is exerted doing so, whereby the sheet material 28 is in close contact with it the core 10 is pulled.

While the web material is held in the position shown by the negative pressure, a cutting tool 40 is used with the help of a 'jteuenrechanis'nus. brought into position. .

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After the cutting tool 40, which has inner and outer cutting members 42 and 44, has been brought into the correct position over the core 11, it is lowered to remove the parts of the web 28 not placed on the core 10 from the part resting on the core 10 cut off the web. After the cutting tool 40 has been lifted from the core 10, the severed portions of the web material can be removed, leaving only the laid-on and shaped portion on the core. ^:

After this part is formed, the core 10 is inserted into the in

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Fig. 5 raised position, and a hoist can be positioned to allow the core 10 to be lifted up and reversed so that it is not busy or covered tail of the core turned upwards is. The core 10 can then be lowered into the position shown in FIG. 3 with the aid of the power or drive device will.

A web section 46 is then applied to the part of the core 10 that is still exposed in the manner described above with the aid of negative pressure. A part of the second web section 46 placed on the core 10 extends continuously along the inner and outer circumference of the core 10, slightly below the circumferential filling line of the core and continuously overlaps the already placed part of the elastameric web material. Oaa not on the core

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Discarded material is described in the vjrsiahmd Way removed.

The overlapping of the parts resulted in thicknesses here Paragraphs or sections, u / elche flow into one another transitional n '/ srbindungsnaht with secure binding or Poetry and without, if necessary, in Cchnai ^ v. ^ An; "J-lagging sharp edges or edges are fused should. In order to achieve this, egg irrigation is used with the help of giner 40, see FIG. 5, a rolling process is carried out.

A control device, which can perform a vertical, a horizontal and a rotary movement, is connected via a cable to a mounting arm 52. Zuiai shafts 54 and 5 3 are pivotably mounted by means of trunnions on the type of attachment 52. At the lower or free end a roll-on roller 58 is rotatably arranged on each roller 54. A shim or pressure device 60 is coupled between the rollers 54 and 56 and serves to move the rollers 58 either from one another or towards one another. The rollers 58 and the shafts 54 and 56 can thus "ground controlled such that they exert an inward force guf an accommodated between the object Ulalzen 58, or they may be moved to release the article to the outside.

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U / βηη both hose parts are formed and cut with the Schneldv / orrichtung 40, the lifting mechanism can be used to raise the plate 14 and thus the core 10 into the position shown. The control is then used to set the shaft 50 to the center point of the core 10. The shaft 50 and the arm 52 are then lowered into the position shown with the arms then pushed apart by the device 60. This adjustment process ri ~ ^h -t2t rien Am 52 unü 'Jig' 3llG ^{r T} A and 55 correctly 'on the

the core 10, so that now the pressing device 60 can be used to align the UJeIlen 54 and 56 to each other to pan. The UJalzen 58 are now with vertical and parallel adjustment of the Uielle 54 and 56 with brought the overlapping parts of the web material deposited on the core into aligned contact.

The device 60 can then be adjusted to apply the desired curling force to the overlapping portions and the U / Elle 50 is rotated to simultaneously curl the overlapping portions or seams. This leads to the DAG the unvulcanized rubber at the overlapping points by flowing a smoothly into each _other; merging connecting seam with complete sealing between the parts. ^v

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The pressing device 60 and the control are then actuated, to lift the rollers 58 and to lift and rotate the shaft 50 to lift the rolling device from the core 10 move away.

After this rolling process has been carried out, the core can and the tube formed thereon removed and placed in a waiting position or, for example in the case of in the tubular tire described above, U.S. Patent 3,606,921, to a device for applying further material or, if a hose is the end product, to brought a vulcanizing mold or vulcanizing press will.

Of course, other types of construction are also possible the invention possible. For example, the core can also be supported with a vertically arranged circumferential plane. It is also possible that the cutting means for Also cutting off the zones not deposited on the core may have other configurations. In any case, however, the invention eliminates the problems and difficulties which occur in forming the tube from overlapping elastomeric tape, by the invention avoided.

- EXPECTATIONS

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Claims (19)

EXPECTATIONS 1. Uerfahren for forming part of a tube on a core, characterized in that elastomer
Material brought into a position adjacent to the core
uiird and a pressure difference between one of the core
facing surface of the elastomeric material and a surface of the elastomeric material facing away from the core
applied to lay the elastomeric material on the core. 2. Uerfahren according to claim 1, characterized in that . the application of the differential pressure is carried out in such a way that the surface of the elastomeric material facing away from the core is exposed to atmospheric air pressure and a negative pressure is applied to the surface facing the core
of the elastomeric material is applied 3. The method according to claim 2, characterized in that a core made of permeable material is used, so that the negative pressure through the porous core on the
The material placed on the core is exerted. - 14 - 509808/0365 4. Method of forming part of a hose on an annular core, characterized in that that the core is supported and a sheet of elastomer Material in a position near the core in the essentially along and parallel to the circumferential median plane of the core that the web is made of elastomeric material is supported outside the outer periphery of the core, and that essentially all when applying the pressure difference between the on both sides of the web, portions of the web of elastomeric material not deposited on the core, leaving behind the portion of the web molded onto the core removed. 5. The method according to claim 4, characterized in that the step of removing the not on the Core parts of the web that have been cut into the core elastomeric material adjacent the core. 6. The method according to claim 4 or 5, characterized in that in a further working step the core surface on which a part of the web of elastomeric material is deposited is limited in such a way that the elastomeric material extends continuously along the inner and outer U _m catch of the core extends a small bass beyond the circumferential median plane of the core. 509808/0385 - 15 - , ORfGiNALlNSPECTED 7. The method according to any one of the preceding claims for Forming a tube on an annular core, characterized in that initially a limited part of an elastomeric web brought up to the core material is deposited on the core, and that after the Removing the parts of the first web that have not been laid down, a new web is brought in, from which a Part is placed on the still exposed part of the core so that it extends a little over the circumference. middle plane of the core extends and the corresponding part of the already deposited on the core first web continuously overlaps along the inner and outer circumferences of the core, and that then all parts of the second that are not deposited on the core Web to be removed. 8. The method according to claim 7, characterized in that the overlapping parts of the two webs elastomeric material are bonded together along the inner and outer circumferences of the core. 9. Device for forming a hose or a part of a hose from elastomeric web material on a core according to one of the preceding claims, characterized in that support means (12) for the Core (10) are provided that means for feeding (30) - 16 - 509808/0365 and for supporting the elastomeric sheet material (28,46) are provided in the vicinity of the core, and that for laying down a part of the web of elastomeric material on the core means (33, 38) for applying a differential pressure between the one facing the core and the one facing the Core off the side of the web are provided. 10. Device according to claim 9, characterized in that the PfIitte 1 for applying the differential pressure to the Web of elastomeric material, an arrangement (33, 38) for applying a negative pressure to the one facing the core Having the side of the elastomeric sheet material, the side of the sheet material facing away from the core exposed to atmospheric pressure. 11. Device according to claim 9 or 10, characterized in that the core (10) is annular and made of permeable material. 12. Device according to claim 11, characterized in that the core is designed as a hollow core. 13. Device according to claim 9, characterized in that the FYlittel for feeding and supporting the web made of elastomeric material essentially comprising a spaced around the outer circumference of the core, consist essentially closed ring (16). 50 98 08/036 5 - 17 - 14. Device according to claim 13, characterized in that that means (22,24) for limiting the use of the web elastomeric material to be covered core area are provided. 15. Device according to claim 14, characterized in that the IKlittel for limiting the core to be occupied area essentially consists of an essentially in the Disc (24) arranged in the circumferential central plane of the core, the outer circumference of which is closely adjacent to the inner circumference of the core, and of a likewise essentially in the ring plate arranged in the circumferential plane of the core (22), the outer circumference of which is in contact with the cylindrical ring (16), and the inner circumference of which is in contact is closely adjacent to the outer periphery of the core. 16. Device according to claim 15, characterized in that the disc (24) and the annular plate (22) with through openings v / are seen. 17. Device according to one of claims 9 to 16, characterized in that means (40) for removing all not deposited on the core part of the elastomeric web material are provided. 509808/0 36 5 - 18 - 18. Device according to claim 17, characterized in that the means for removing the not on the core deposited web material comprise cutting means (42,44), 19. Device according to one of the preceding claims, characterized in that a device (48) for binding the overlap point from to / from Halves (28,46) of molded hose is provided. 5098Ö8 / 0365 . -te- Blank page