DE1928736U - DEVICE FOR THE MANUFACTURE OF THERMOPLASTIC HOSES REINFORCED ON THE INSIDE. - Google Patents

Description

DK. ING. H. NEGENDANK W

PATENT ADVOCATE HAMBUHe 36 NETJBR WAIL 411 FEHNRUF 36 74 88 AND 36 41 IB

TELEGEAMM-AKSOHEIFT I TiläGEDAPATENT

Spa. JELLY 3

S 45 12? / 59a St, ^ ^

Device for the production of thermoplastic, internally reinforced hoses "

The innovation relates to a device for manufacturing of blown thermoplastic hoses, which are reinforced during the pressing process and then connected by * » extrusion are coated with other plastic material

The production of hoses from elms with an inner braiding made of mesh fabric or the like is currently carried out so that between two Hastikfilmen uses a prepared mesh fabric and then a stable connection through hot calendering or with the help of other pressing methods * The hoses are then rolled out of this and welding of the coming together longitudinal edges.

Up to now it was not possible to use flexible hoses, e.g. from 3? olvaethylene or from another similar one thermoplastic material with cladding or internal reinforcement, which is applied immediately during the extrusion

Dtess document (description uno Schufjcnsp ;.) isf öis 2ulsfz! ! * eingeroith she ton Aeichl the i # 0W2 "-> dc jack Unierlogen filed if the fe" f "': s ßsdeufung the deviation not isf geprCfti.. t) t * ursidröngNch are in soft documents;: äi · η J-sn official files. At the moment, they can be received free of charge without any interest, including photographic scopes or photos delivered at usual prices on request. German Pofeotami, Oebrouchsmusswstsiie.

driving is used to manufacture because of the extruded Hose, even if stiffened by air introduced under pressure, does not have such mechanical strength features onYireisen that a wrapping of a mesh fabric would be possible without deforming the hose

lur in the lalle of profiles or rigid drilling or with Drilling with a sufficient thickness, it was previously possible to clap the pipe with web directly during the extrusion process. In these lounges it is also possible to work in successive steps, e.g. in one The braiding is produced and in a second operation it is covered, although no continuous and no economical production can be achieved.

The purpose of the fire is to provide a device create, with the continuous production of internally reinforced, essentially multi-coated blown elms is possible, so that flexible sehlä, uche high mechanical strength can be produced «

Another purpose of hiring is to enable continuous and economical production, completely independent of the thickness of the extruded films and of the type of braiding made of spun or the like, so that numerous requirements for use can be met

Another purpose is to provide an extrusion press with appropriate means for calibration

of the hose being processed both during the braiding ^ with webbing, as well as during the end dressing with another extruded plastic material.

These and other purposes, which emerge more clearly from the description, are achieved by a device which is characterized in that it consists of a first blow extrusion press with a first injection tool zxm. Blow-extrusion of a first IPilmsehlauehes, further from a Umklöpperlungsvorrichtung which is arranged in the vicinity of the first extruder and which comprises the first, exiting from the extruder tube of film, and from a second extruder with an annular injection tool, the outlet opening is substantially co-axial with the outflow opening of the first injection molding tool and is arranged at a greater distance therefrom than the Umklö'ppelungsvorrichtung, and wherein the second annular injection molding tool has a passage for the passage of the first film tube, the outflow opening of the second injection molding tool comprises this passage, further a having calibrating support which is attached to the middle part of the first injection molding tool and extends at least into the area of the Umklöppelungsvorrichtung to facilitate the attachment of the Umklöppelung and a deformation of the Pilmschlauches at least in this area h to prevent.

The hiring is described in more detail below using an exemplary embodiment and the drawings.

Ib show J.

Fig. 1 in plan view shows a device for the Production of a reinforced flexible hose from thermoplastic material,

FIG. 2 shows an axial cross section through the device according to FIG. 1,

3 shows an axial cross section through another embodiment of the door direction according to the preceding figures,
and

Fig. 4 is a perspective view of a rope of a reinforced Hose made with the help of the gate direction according to the previous figures

The device is particularly suitable for the continuous production, according to the blow-extrusion process, of films with low thickness and therefore suitable for flexible films, for which it was previously not possible, an internal or external Carry out lining or reinforcement of the hose without using a calendered, according to the usual ^ experience produced to run out of multi-coated film, which is then rolled up into a tube

With particular reference to Figures 1 and 2, the blown thermoplastic film 1 formed with a braid made of webbing .. or other suitable material is to be clad, continuously via an extruder 2 known design with angled injection molding machine extruded

In the injection molding tool 3 there is a tube and a bore 4 for introducing compressed air in order to keep the bore diameter constant according to methods known per se are applied, which are unwound from the bobbins 5, 5 ¹ , 5 ″, among other things, the bobbins being from plates 6 and 6 'rotatable coaxially to the tube or being set in rotary motion by other drives, not shown a mesh fabric or the like is achieved in that the ^{web unwound from the spool 5, 5 1} and others is wound helically around the inflated tube, the wrapping by a combination of the rectilinear movement of the tube with the, preferably counter-rotating, circular movement of the rotatable plates 6 and 6 ^{f is} obtained

To avoid deformation of the pipe during the wrapping or · to prevent clapping and, above all, to keep the pipe diameter calibrated or constant, is inside of the tube a cylindrical hollow holder or mandrel 8 is provided, which is cantilevered from the inner part of the core part of the Injection tool 3 is held · By the presence of the mandrel 8 in the Umklöpplungsbereieh the production of the desired ten braid without deforming the pipe, allows. In order to keep the surface of the visual tube sufficiently cool, the mandrel 8 is traversed by cooling / water, which is through pipelines 9 and 9 'flows around the mandrel in a cavity 10 *

The tube reinforced in this way is then passed through a second extruder 11 with an annular angle injection molding

- 6 «* ·

Tool · performed 12 When passing through this Spritzwerk- ^Vi imaging is coated the umgeklöppelte pipe with a thermoplastic material, which is generally the same material from which the inner tube · To the best possible connection between the coating composition and the .darunterliegenden braiding In order to achieve this, the injection molding tool 12 has an annular recess 13 »in which a negative pressure is generated by the pipe 14, whereby the material extruded by the injection molding tool adheres securely to the pipe film underneath, which is also facilitated by the inclination of the outlet opening of the injection molding tool this inclination, in connection with the straight movement of the tubular film underneath, results in an even distribution of the coating material.To seal the annular recess 13, it is sealed at the entrance by a rubber seal 15 or the like and on the opposite side by the lips of the spr itzwerkzeuges limited, from which the second tubular film exits to cover the first.

During the attachment of the outer shell, the pipe film is ^{kept sufficiently rigid by the compressed air introduced via the pipes 4 and 4 f} , while the actual contact or adhesion between the outer and inner pipe film is favored by the negative pressure generated in the recess 13.

According to the furnace, the outer covering of the reinforced pipe film, instead of using a negative pressure inside of the bit of the second extrusion press with the help of a inner support device, similar to the dome 8 described, are made.

In this lall (]? Ig. 3) the tubular film 1 ', which is extruded by an extruder 2' as in the first ^ aIl, is clipped by means of the hats with the usual coils 5, 5 * "5" τι.a. uinklöppelt After clapping with the help of the mandrel 8 ¹ , the pipe film is passed through the angled injection molding tool 12 'and the predetermined pipe width? D.rd is not kept unchanged by the compressed air introduced, but mainly by a second support 16, which is cantilevered on the core part of the angular injection mold is arranged · This second supporting mandrel 16 is practically coaxial with the mandrel 8 ^! and is arranged as an extension of the latter.

The mandrel 16 thus has the task of facilitating adhesion between the second and first extruded tubular films without the need to resort to negative pressure chambers. The mandrel 16 is also cooled by cooling water which flows in the chamber 17 through the pipes 18 and 18 ', the latter being guided over the core part of the first spray tool and opening into the chamber 17. The blown air is introduced into the hose piece between the first 8 ¹ and second mandrel 16 via the line 19 and from there via the opening 20, the hollow head of the mandrel 16 and the opening 21 into the tubular film flowing out of the second injection molding tool 12, the line 19 is passed through the mandrel S *.

The blown air is blown into both thorns in order to create a slight overpressure in the inner part of the hose produce that for better braiding and also for

" 8th -

ft

Favoring the joining of the two extruded ones Tubing is required.

If the second Doras is used, the coating on the hose that was first extruded, mainly due to the pulling action.

According to the hiring, the internally reinforced hose can be produced according to either one or another solution be or by a combination of both solutions and the finished hose is after previous The distortion is wound into bobbins with the help of the usual pulling rollers 22.

The plastic material usedi the number of Coils and the plates, as well as the type of application of the Braiding and the various components of the device can be changed in practice according to requirements, and some components of the device can be replaced by other, equivalent components without deviating from the protective concept of fire

Claims (2)

RA.83748 0 * 11/28/54 DR. ING. H. THANK YOU PATEN TAN WALT ΗΑΜΒΓΓΗβ 36 ■ NETTEH WALI, 41 * · PERNRXTE ¹ 86 74 88 AND 36 41 15 BpA OBLEKE!
45 12g / 39a Gbm Eye protection requirements 1 «Device for the production of thermoplastic, internally reinforced hoses, characterized in that it consists of a first blow-extrusion press (2) with a first injection tool (3) for blow-extrusion of a first film tube (1), furthermore from a braiding device (5 , 6), which is arranged near the first extruder (2) and which comprises the first film tube (ΐ) emerging from the extruder (3), and from a second extruder (11) with an annular injection tool (12) consists, whose outflow opening is essentially coaxial with the outflow opening of the first spray tool (3) and is arranged at a greater distance therefrom than the cleating device (5-6) and wherein the second annular spray tool (12) has a passage for the implementation of the having first film tube, wherein the outflow opening of the second injection molding tool (12) comprises this passage, furthermore has a calibrating support (8) which is attached to the middle part of the first injection molding tool (3) and extends at least as far as the area of the braiding device (5,6) in order to facilitate the attachment of the braiding · - 2 · "- to facilitate development and a deformation of the film tube to prevent at least in this area 2. Device according to claim 1, characterized in that the Umklöppelungsvorriehtung consists of a rotatable support device (6,6 ') "which is arranged in the vicinity of the injection molding tool (3) and is rotatable coaxially with the outflow opening of the injection molding tool (3), whereby several spools (5, 5% 5 ", etc.) are arranged on this support device (6,6 *), of which the web for the 'production of the cleavage on the first film tube during the rotary movement of this support device (6,6 *) around the shifting hose «film is unwound · 3 · Device according to claim 1 and 2 » characterized in that the support (8) is in the form of a hollow cylinder which protrudes from the central part of the first injection molding tool (3) and has lines (9, 9M for the Circulation of a cooling liquid is provided. 4. The device according to claim 3, » characterized « in that further lines (4, 4 ') for the blown air to be introduced into the film tube (1) are arranged in the hollow cylinder (8). 5. Device according to claims 1 to 4 » characterized » in that the second injection tool (12) has an annular recess (13) in the part surrounding the outlet opening, as well as channels connected to it - 3 _ - ³ - Λ ρ (14) to create a negative pressure there 6 * Device according to claims 1 to 4, characterized in that "a cylindrical mandrel head (i6) is accommodated in the passage of the second injection ^{molding tool (12 f} ) in order to guide the extruded film tube from the inside"