DE2823644A1 - METHOD AND DEVICE FOR MANUFACTURING LINE BRANCHES - Google Patents

Description

The invention relates to a method for connecting pipes to the one made of a hardenable plastic material Wall of a vessel or a line and in particular the production of branched connecting hoses, such as those for example to connect water-cooled internal combustion engines with coolers use.

In a known method for producing branched connecting hoses, one end becomes a side hose made of reinforced cured elastomeric material, for example vulcanized natural rubber, in a tube in the Wall of a main tube made of the same material used and fixed there by means of an adhesive. This will make a collar molded from the elastomeric material around the juncture of the two tubes or hoses to form a seal. A Metal tube can be received in the end of the side tube to increase the stiffness of the hose at the junction between to increase the two pipes. An alternative method is to use a side pipe or hose with a integrally provided on this flange formed; this is used to attach the side pipe or the side hose the surface of the main pipe or hose, which is made of reinforced hardened plastic material. Similar Methods are used when connecting pipes or hoses to other vessels or connecting lines.

The physical properties of the product produced by such processes Object, in particular the bursting pressure, are generally at the connection point! Of the hoses or pipes worse than the properties of the other parts of the wall or pipe.

In accordance with the present invention, a method of connecting a pipe or hose to a wall of a created from a curable plastic material existing vessel or line, in which the wall

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of the vessel or the line is provided with an opening in which one end of a curable plastic Existing hose or pipe material is clamped against the wall so that one of its pipe surfaces and the Surface of the wall surrounding the opening rest against each other and at the same time the wall and the hose or the Pipe are cured to join the wall and pipe together.

The term "plastic material" includes elastomeric material such as natural rubber, polymeric material such as synthetic Rubbers and mixtures of both materials.

By laying the end section on top of one another and resting against one another of the pipe or hose and the portions of the wall and adjacent to the opening contained therein by curing or vulcanizing both the pipe and the wall in that clamped in this assembly State, the strength of the connection can be improved considerably. The method according to the invention is special effective when both the side pipe or the side hose and the wall contain reinforcing material as the connection then has a multiple thickness of reinforcement material.

If the wall contains reinforcing threads, the breakthrough is preferably effected by making an initially relatively smaller Breakthrough is formed in the wall and the initial breakthrough by deforming the material of the wall and the threads is brought to the required size in the radial direction away from the initial opening. That way, the breakthrough will be formed with the least possible interruption of the reinforcing threads.

The method of the invention is particular in manufacturing branched connection hoses useful. In the preferred embodiments of the invention, the wall with which the Hose is connected, the wall of a main pipe or a

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Main hose of a hose connection.

The invention also includes an apparatus for connecting a Pipe or hose with the wall of a vessel or a conduit with a first support for supporting the wall of the vessel or the conduit and a second support for supporting the pipe or hose, wherein the second support extends away from the first support and with a bracket attached to the second support, with which the material from which the Wall and the hose or pipe are made to be clamped together around the junction of the first and second supports.

If the device according to the invention in the manufacture of branched Hose connections are used, the first support is in the form of a dome for supporting the main hose the hose connection executed.

To ensure that the pipe or hose wall and the To bring about the vessel or conduit wall, one end of the tube or hose is preferably turned outward Flange deformed and clamped to the wall in such a way that the flange facing outwards and the one adjacent to the opening Lay the wall surface on top of one another. To this end, the second support of the device according to the invention preferably comprises a foot positioned adjacent the first support around the outwardly facing end on the hose or tube to train.

Additionally or alternatively, the edge of the opening in the wall can be deformed into an outward-facing lip, and one end of the hose or tube is clamped to the wall so that the end of the hose or tube and the lips are on top of each other.

A further strengthening of the connection point between the two pipes or hoses can be achieved in that a layer or sheet of reinforcement material between the overlapping surfaces of the pipe or hose and placed on the wall before curing.

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As far as the device according to the invention is concerned, the Bracket have the usual structure. However, it preferably comprises a saddle-shaped configuration in order to accommodate the connection adjust the first and second supports; this saddle-shaped formation is preferably along the second Support can be moved towards the connection point. A suitable design for moving the saddle part comprises a screw mechanism, which is screwed into the first support and the one with the end remote from the connection of the saddle part can be brought into engagement.

The articles produced by the method according to the invention can be made from any thermosetting plastic material. Preferably in the case of branched hose connections Elastomers such as ethylene-propylene copolymers or vulcanizable natural or neoprene rubbers used. The objects can also be constructed from mixed materials. So can a hose connection according to the invention was made, a main part and a blanket made of different materials, such as natural rubber and neoprene, respectively. The material of the hose is usually reinforced, for example with fabrics made of knitted or woven yarn.

The invention is explained below, for example, with reference to the drawing explained in more detail; in the drawing shows:

1 shows an axial section through a hose connection during its formation with a device according to the invention,

Figure 2 is an end view of the device used in Figure 1;

FIG. 3 shows a representation similar to FIG. 1 using a second embodiment of a device according to the invention ,

Figure 4 is an end view of the device used in Figure 3

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Figure 5 shows an intermediate stage in the assembly of the hose connection on the device according to Figure 1 or 2,

FIG. 6 shows a representation similar to FIG. 5 _r based on the device according to FIG. 3 or 4,

FIGS. 7 and 8 process steps of a modified process using the devices according to Fig. 2 or 4,

FIGS. 9 and 10 process steps in the construction of a hose connection with a third or a fourth embodiment of a device according to the invention.

The connecting device according to Figures 1 and 2 comprises two supports 1 and 7, each of the main hose 2 and a side hose 8 support. The first support is in the form of a main mandrel which spans a main hose 2 produced in a conventional manner. The main hose 2 consists of a hardenable plastic material, for example a curable or vulcanizable ethylene-propylene copolymer. Reinforcing threads 4 extend in the longitudinal direction of the main tube 2.

The side tube 8 consists of a material of the same type as the main tube 2 and also contains reinforcing threads 9. The second support 7 comprises a foot part or foot section 10 which forms a widened end on the side tube 8. the second support 7 is removably attached to main mandrel 1 by means of a screw 12. The screw 12 extends through the The foot part or the foot section 10 and is screwed into a radially directed bore 13 in the main mandrel 1. The second prop 7 further includes a sleeve 14 through which the screw 12 extends. The sleeve 14 holds the foot section or the foot part

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10 at a distance from a cap or cover part 15 on which the Head 16 of the screw 12 rests. The cap or lid 15 is at one end of an outer molded sleeve 18, which the side tube 8 surrounds. The other end of the outer sleeve 18 is designed so that it is the connection of the first and second Column 1 or 7 corresponds. The screw 12 and the cap 15 thus form an adjustable screw mechanism for moving the outer sleeve 18 towards the main mandrel 1.

In use, the main hose 2 is taken from a hose supply cut to the required length. An initial breakthrough 20 is in the wall of the main tube 2 in such Made size so that the narrower end of the foot portion or foot portion 10 can be pushed through. The diameter of the initial opening or opening 20 is smaller than the inner diameter of the side tube 8. The Foot 10 is then forced through the initial opening 20 so that the material of the main tube 2 and the reinforcing threads 4 in the vicinity of the initial opening 20 is forced away from the initial opening 20 in the radial direction will. This increases the diameter of the initial opening 20 until it corresponds to the inside diameter of the side tube 8 corresponds to without further destroying the reinforcing threads 4. In addition, the displacement of the yarns 4 in the radial direction away from the opening 20 results in an increased density of the reinforcing material in the immediate vicinity of the opening 20. The foot part 10 deforms the edge of the opening 20 into an outwardly turned lip, as shown in FIG. When the foot section 10 seated in the opening 20, the main hose 2 is pulled onto the main mandrel 1 so that the foot part 10 over the bore 13 to come to lie.

The side hose 8 is then also cut from a supply hose to the required length. The sleeve 14 is inserted into one end of the side tube 8 and the end of the

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Side hose is deformed either by hand or by machining into an outwardly facing flange. The side tube 8 is then slipped over the foot part 10 so that the outwardly facing flange through the edge of the opening or the opening 20 covered lip formed. The outer sleeve 18, the cap 15 and the screw 12 are then, as in FIG Figure 1 shown used. The screw 12 is then screwed into the bore in the main mandrel 1 and moves the outer sleeve to the main mandrel 1 and clamps the superimposed parts of the side tube 8 and the main tube 2 between the foot part 10 and the outer sleeve 18 (Figure 1). In this position the two reinforcement twisted layers 4 and 9 lie on top of each other, so that the junction of the two hoses has a multiple reinforcement layer.

If necessary, a ring part made of reinforcing material can be placed between the parts of the main hose 2 lying one above the other and the side tube 8 can be arranged in order to achieve further reinforcement. It can also be a connection or Adhesive can be applied between the superimposed parts of the two hoses, if necessary.

FIG. 7 shows a somewhat differently designed method step for the device according to FIGS. 1 and 2. In this method step, the foot part 10 is inserted into the end of the side tube 8 inserted and the opening 20 is prepared so that the insertion of the foot part 10 is possible; here comes the Edge of the opening 20 to lie adjacent material over the outwardly turned end portion of the side tube 8.

If, as described above, jammed with the main hose 1 Side hose 8, the two hoses are simultaneously by heating the entire assembly on the vulcanization or Curing temperature of the elastomeric material cured or vulcanized. This can be done by rinsing with steam

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will. During the hardening process, the material of the hoses expands and thereby increases the pressure between Connect foot part 10 and outer sleeve 18 and the two hoses each other.

When the hardening process has ended, the screw 12 is removed so that the outer sleeve 18 and the sleeve 14 can be removed. The main mandrel 1 is then removed from the main hose 2, so that the foot part 10 also can be removed.

The device according to Fig. 3 and 4 is made similar to that of Figures 1 and 2; however, the second support 7 contains no foot part 10 for expanding the side tube end. The sleeve 14 extends the entire length of the screw and the end of the sleeve 14 adjacent to the bore 13 is chamfered and extends into a counterbore 25 therein Main mandrel 1, which is concentric with the threaded hole 13.

In use, the initial opening 20 in the main hose 1 formed with a diameter about the same and usually slightly less than that of the threaded end of the screw 12. The main hose 2 is then pulled onto the mandrel 1 and the opening 20 with the bore 13 The cap 15 and sleeve 14 are placed on the Screw 12 attached, the side tube 8 is on the Sleeve 14 pulled up and the outer sleeve 18 over the side tube 8 plugged. The end of the side tube 8 is then processed by hand or machine so that a after outwardly turned flange results and the end of the screw is, as shown in Fig. 7, screwed into the bore 13, The screw 12 is tightened firmly while chamfering it The end 26 of the sleeve 14 is drawn through the opening 20 into the countersunk bore 25 and so the opening 20 is displaced

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of the material of the main hose 2 and the reinforcing threads are enlarged in the radial direction away from the opening 20. A Further tightening of the screw 12 results in the inner tube surface being pressed against the end of the side tube 8 the outer surface of the main hose 2 surrounding the opening 20.

FIG. 8 shows an alternative method using the device according to FIGS. 3 and 4. Instead of the Expansion of the end of the side tube 8 into the shape according to FIG. 7, the end of the side tube 8 becomes cylindrical held so that when the screw 12 is tightened, the end of the side tube 8 is compressed so that the outer tube surface of the side tube 8 over the surface area of the main tube 1 surrounding the opening 20 come to lie.

In Fig. 9 an alternative embodiment of the device according to the invention is shown. The foot part 10 is not here a special part, but made in one piece with the mandrel 1. The mandrel 1 contains an undercut or incision and the foot part 10 is fastened in this incision by means of a screw 30 which is inserted in a radial bore 31 in the Pin 1 is seated. This results in the necessary surface transition between mandrel 1 and foot part 10. In this case the upper section of the foot part 10 extends only over the radius of the outwardly deformed section of the main hose 2. In this way, the main hose 2 can be pulled onto the mandrel 1 and the initial opening 20 in the main hose 2 is aligned with the foot part 10. The side tube will then, as already mentioned, cut to size, the sleeve 14 is inserted into the side tube 8 and the end of the Side hose deformed into an outwardly facing flange and arranged over the foot part 10 that the flange

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the opening 20 in the main hose 2 is covered. The outer sleeve 18, the cap 15 and the screw 12 are, as already described, attached. The threaded end of the screw 12 is then screwed into a radial bore 32 in the foot part 10, so that the outer sleeve 18 moves towards the mandrel 1 and the side hose 8 with the main hose 2 between the foot part 10 and outer sleeve 18 jammed. The sealing and curing the walls of the tubes 2 and 8 is then carried out as already described.

FIG. 10 shows an alternative embodiment of the device according to FIG. 9. The foot part 10 is inside in the vertical direction of the incision 27 of the mandrel 1 movable, the upper limit of the movement by the stop on the lower surface of the screw head 29 of the screw 30 is formed. A rotation of the foot part 10 about the central screw 30 is open known manner, for example by wedging or toothing (not shown) on the foot 10 or the screw 30 prevented. When the foot part 10 is in its lowest position, it does not protrude over the surface of the mandrel 1 in front of and the main hose 2 can easily be pulled onto the mandrel 1 in this way. The side tube 8, the sleeve 14, the outer sleeve 18, the cover 15 and the screw 12 are, as already described, attached so that the end of the side tube 8 covers the opening in the main tube 2. The threaded end of the screw 12 is partially inserted into the bore 32 is screwed into the foot part 10 and the foot part 10 is raised to its uppermost stop, as shown in FIG. 10 is, so that the area of the main hose 12 surrounding the opening 20 is displaced outward in the radial direction. The screw 12 is then screwed completely into the bore 32 and thus moves the outer sleeve 18 against the mandrel 1 and jams the superimposed sections of the side tube 8 and the main tube 2 between the foot part

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10 and outer sleeve 18, as shown in FIG. 10. The two hose = are simultaneously, as related to Fig. 1 and 2 described, cured or vulcanized.

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Claims (9)

MANITZ, FINSTERWALD & GRÄMKOW Munich, the S / 3 / Pr-H 2096 HERTFORDSHIRE POLYMER PRODUCTS LIMITED Beacon House, Pyrford Road, West Byfleet, Surrey, England Method and device for the production of line branches Patent claims 1.! A method for establishing a fluid connection between a first line and a vessel or a line, in which a wall of the vessel or the line is provided with an opening and an end portion of the first conduit with the wall of the vessel or the conduit around the breakthrough in connection is brought, characterized in that the end portion of the first line consists of a hardenable or vulcanizable material and that the wall surface surrounding the opening of the vessel or conduit a curable or vulcanizable material and that the superimposed sections of the first line and the vessel or conduit are cured or vulcanized at the same time. ORIGINAL ίΗΒΡΕΟΐ 809850/0843 DR. C. MAN (TZ ■ DIPL.-ING. M. FINSTERWALD DIFL.-INC. W. CRAMKOW ZSNTRALKASSE BAYER. VOLKSBANKEN β MONCHiN SS. IIOSERT-KOCH-STRASSE I 7 STUTTGART SO (BAD CANNSTATT) MUNICH, ACCOUNT NUMBER 7270 TEL. IO89) 234311. TELEX 08-29672 PATMF SEELBERCSTR. 23/25. TEL. (07 [l) 56 72 61 POSTSCHECKrMONCHEN 77062-805 2. The method according to claim 1, characterized in that that the end portion of the first conduit is formed into an outwardly turned flange, so that a inner tubular surface of the end portion of the first conduit on the perforated portion of the wall of the vessel or the line rests and surrounds the breakthrough. 3. The method according to claim 1 or 2, characterized in that the wall surrounding the opening Vessel or the line is deformed into an outwardly turned lip. 4. The method according to any one of claims 1 to 3, characterized in that a reinforcing material layer between the overlapping surfaces of the first line and the wall of the vessel or line the curing or vulcanizing process is arranged. 5. Device for connecting a first conduit to a wall of a vessel or a conduit, with a first support for supporting a wall of the vessel or the conduit and a second support for supporting an end portion of the first line around a breakthrough in the wall of the vessel or line, characterized in that, that one the wall of the vessel or the line (2) with the first line (8) around a junction between the first support (1) and the second support (7,14) compressing clamp (12,15,18) is provided. 6. Apparatus according to claim 5, characterized in that that the second support (7,14) is adjacent to the end section of the first line (8) of the first support (1) includes externally expanding foot part (10). 7. Apparatus according to claim 5, characterized a net that the first support (1) / in a recessed Section (27) of the first support (2) arranged foot part (10) ^owns · 809850/8843 8. Apparatus according to claim 7, characterized in that that the foot part (10) is vertically movable within the cut portion (27). 9. Device according to one of claims 5 to 8, characterized in that the clamp (12,15,18) is designed and saddle-shaped according to the desired shape of the connection between the first support (1) and the second support (7,14) that the clamp (12, 15, 18) can be moved towards the connection point ^{with the aid of a screw mechanism 1} which can be brought into engagement with an end section of the saddle-shaped clamp which is remote from the connection point. 809850/0843