DE1652604A1 - Hydrostatic extrusion device - Google Patents

Description

PATENT ADVOCATE

DIPL-ING. ERICH SCHUBERT punch / ^{phone: (02 n) 32409}

165260A

Telegram address: Patschub, Siegen Postal check accounts: Cologne 106931, Essen 20362 Bank accounts: Deutsche Bank AG.,

Abs .: Patent attorney Dipl.-Ing. SCHUBERT, 59 Siegen, Eiserner Strasse 227 ■ Siegen and Oberhausen branches (RhId.)

P.O. Box 325

68 015 gl / 'dchm

Jan. 31, 1968

united kingdom Atomic Energy Authority,

11, Charles TI dtreet, London, SW1 _O , England %

For this filing, the priority is taken from the UK Patent application iir. 5149/67 of Feb. 2, 1967 claimed.

Hydrostatic extrusion device

The invention relates to extrusion devices or systems, in particular on devices for carrying out a hydrostatic extrusion process / hydrostatic extrusion process /. In a conventional extrusion process, a plug, blank or compact (hereinafter referred to as "compact"), who is in a chamber, a direct one

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_ ο -

subjected to mechanical stress, causing the compact from the chamber through a Huiidatück or a press nozzle is extruded through. The compact v / eist a tight or precise seat / close fit / in the chamber on, and a ätrangpreßdruck is applied to the end face of the compact a piston or plunger applied, which is in the Bonrung the Chamber is in force. The hydrostatic extrusion has different features compared to the traditional extrusion Advantages or merits and differs from the conventional one Extrusion in that for application or - ubermixtein of the otrangpreßdrucks on the compact, a liquid is used. The liquid surrounds the compact in a chamber and is pressurized in order to act directly on the compact. Since the liquid surrounds the compact, there is no frictional contact present between the chamber and the compact. The nozzle friction is also reduced because the pressurized Liquid in the vicinity of the nozzle opening for provides hydrodynamic lubrication between the material being extruded and the extrusion nozzle.

The invention relates in particular to devices for carrying out an extrusion process in which a compact is subjected to both the pressure of liquid in an extrusion chamber and a direct axial load or force in one direction on the nozzle , the compact being subjected to the nozzle is extruded through under the combined pressures or stresses arising from the

1098U / 0593 bad ORIGINAL

Fluid pressure and the direct axial load applied to the compact. A direct axial load came through a plunger, which is introduced into the rear end of the tftrangpreßkainmer and attached to the rear end face of the compact, applied to the compact or transmitted to it. If the prebul is extruded, the plunger maintains contact with the rear end surface of pellets and sweeps over, displaces or sweeps the volume of the extrusion kaiuiaer, so that when the extrusion of the prebul continues, liquid must be removed from the bore of the forth Htrangpreßkammer while the pressure maintained v.'ird, is required to extrusion OEEC _Preßlin: ü maintain. 2s is further desired excess liquid AUC of the bore of £ Strangpreßkar.ii.ier remove \: hen the .Strangpressen of the compact proceeds, so that the btrangpressens the compact remains bale case (only) little liquid in the strand at the completion of Λ , whereby the release or the occurrence of a pressure surge / blast / of the high pressure liquid is avoided, which would occur at the end of the extrusion of the compact.

It is a ζ Ze] il (object) of the invention to provide Hittel / bleeding / liquid from the bore of a dtrangpreßkammer for a controlled seeping or draining, while

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a compact hydrostatically from the extrusion chamber is extruded.

According to the invention, a device for the controlled discharge of high pressure fluid from the bore of a Extrusion chamber on two components, which have contacting sealing surfaces, with an escape route for Liquid from the bore of the extrusion chamber vahanden between the contacting surfaces of the two components is and means are provided for loading one of the components against the other, such that a controllable Pressure caused between the surfaces of the components in contact with sicxi will.

In one of the embodiments of the invention, discharge or discharge means / bleed means / for the controlled discharge ψ of high-pressure fluid from the bore of a Jtrangpreukaiumer vorgasehen, which has a Ütrangpreßwerkzeug that is attached to one end of the bore, and a piston that is in the other rear end of the bore is made, for pressurizing fluid surrounding a Preßlin _to in the bore of the Strangpreßkammer, and for applying a direct axial loading of the compact, wherein the discharge means / have a circular Durchlaßring / annular bleed ring, of the at the rear end of the bore of the

- _ΛΛΛ BAD ORIGINAL

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Extrusion chamber is attached around the piston, wherein the passage ring has an inner cylindrical surface which surrounds the piston, and an outer frustoconical circumferential surface which has a complementary inner truncated cone surface cooperates around the end of the bore of the extrusion chamber, wherein means are provided for the Applying or transmitting a load to the end face of the passage ring outside the bore of the extrusion chamber, around the outer frustoconical surface of the passage ring against the complementary inner truncated cone surface in the end of the bore of the 3trangpreßka :: aer to load, whereby by reaction between these surfaces the inner cylindrical surface of the passage ring radially, inwardly in contact with the surface of the piston is loaded while fluid from the bore of the otrangpreßkammer during extrusion of the compact between the surface of the piston and the inner cylindrical surface of the ο Dure / ilaßringes happens.

In another embodiment, the invention is characterized by drainage means for the controlled drainage of high-pressure fluid from the bore of an otrangpreßbehälters eus, which has a tubular liner in its bore, an extrusion die being attached to one end of the liner and a piston in the other behind ^ walls of the liner is introduced to Sruekfoeauf machines of liquid surrounding a compact in the lining of 3 trangpreßkaraffierbohrung, and; Applying "the transmission" in a direct axial load on the compact,

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the drainage means comprising a circular throat ring extending around the rearward end of the bore of the extrusion chamber is mounted around the piston, the liner having an inner cylindrical rim which the piston on surrounds the rear end of the bore of the extrusion chamber, and wherein the end surface of the liner is near the passage ring * an outer frustoconical shape on v / eist, wherein the bore of the passage ring in an end surface of inner truncated cone shape extends into it, which is complementary to and cooperates with the frustoconical band surface of the liner, gowns being provided for applying or imparting stress to the end face of the throat ring outside the bore of the extrusion chamber, around the inner frustoconical end surface of the throat ring against the outer Straining the frustoconical endolar surface of the liner, whereby by reaction between these surfaces the inner cylindrical edge of the liner is in radially inward contact with the surface of the piston is loaded, with liquid flowing from the bore of the extrusion chamber during the extrusion of the compact seeps through between the surface of the piston and the inner cylindrical band the lining pssiert or continuous u

In the latter two embodiments of the invention can apply the required load on the end face of the passage ring outside the bore of the Straz ^ rßkaramer by pressure

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BATH ORIGINAL

application of liquid in a secondary container, co-extensive with the extrusion chamber, (and) from which the Pistons are inserted into the rear end of the bore of the extrusion chamber, provided or supplied, wherein the passage ring around its outer peripheral surface in the Eoiirung of the secondary container is sealed.

In a further embodiment, discharge means for the controlled discharge of high-pressure fluid kit are provided according to the invention. >; he bore a btrangpreßkcjasier provided, ä ± 3 at äeia one end of the Bonrunj rait einia otrangpreßv / eri ·; -se-.ii: aasgerestand 1,3t and has a piston which is in the other rear end of the bore is introduced for pressurizing liquid surrounding a compact in the bore of the extrusion chamber and for applying a direct axial load to the compact, the venting means comprising a passage ring which extends around the extrusion nozzle. is attached, v / obei the Durchlaßring an inner \ cylindrical hand, \ .elcher contacts the outer surface of the die, and an outer truncated cone-Endoberf laugh comprises that:. _t it an inner truncated cone surface around the end of the bore of the Strang25reßkaiBBier is complementary and cooperates with this, wherein means are provided for applying a load to the end face of the passage ring outside the bore of the extrusion chamber, against the outer truncated cone surface of the passage ring

1098U / ns93 _ÖA or similar

the inner frustoconical surface around the end of the bore • the extrusion chamber to load iierum, whereby by reaction between these surfaces the inner cylindrical edge of the passage ring radially inwardly in contact with the outer surface of the extrusion nozzle is loaded, while liquid flowing from the bore of the extrusion chamber seeped forth during the extrusion of a compact, ^ between the outer surface of the extrusion nozzle and the inner one cylindrical edge of the lining happened.

In the latter embodiment of the invention the extrusion die to an end plate may separate from the mounted ötrangpreßkammer, and means are provided for loading the ötrangpreßkammex · on the end plate to so that the end face of the Durchlaisringes outside the bore of the itrangpreßkammer against the end plate loaded k in order to provide the loading of the passage ring, uie is necessary for the controlled discharge of fluid from the bore of the extrusion chamber.

Another embodiment of a device in which drainage means according to the invention are used, is composed of an extruded pre-karamer, which has a bore has, which is provided at one end with an extrusion tool or with a compression nozzle, from a secondary Liquid container that has a bore that is connected to

BATH ORIGINAL

109814/0593

the bore of the extrusion chamber is arranged coextensively, from a piston which is introduced into the rear end of the bore of the .Strangpreßkammer from the secondary liquid container, from a main plunger of larger diameter than the diameter of the piston, which is introduced into the rear end of the secondary plus container wherein the piston has a cylindrical head of the same diameter as the main plunger, the end surface of the piston head g having a raised annular hand, thereby forming a recess in the end surface of the piston head, the front end surface of the main plunger against the annular rim rests on the piston head, the ring-shaped hand on the end face of the piston head being arranged radially at a distance from the edge of said end face, means being provided which seal slidably between the main tappet and the piston head, whereby a closed or closed annular space between ischen the opposite end surfaces of the main plunger and the head of the piston, the closed annular space surrounding the annular rim on the end face of the piston head, with a passage through the piston from the bore of the otrangpreßbehälters to the recess in the end face of the piston head from means for pressurizing liquid in the bore of the secondary container, from means for applying a controllable load to the main tappet, which thereby loads the piston in order to put the liquid under pressure , which presses a compact in the bore of the strand

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surrounds compression chamber, and llh apply or transmit a direct axial load on the compact in the otrangpreßkainnier, as well as means for emptying the liquid from the closed annular space which is formed between the opposite end faces of the main plunger and the head of the piston, the Cross-sectional area = of the extrusion chamber, the area of the annular rim on the end surface of the piston head, the area of the recess in the end surface of the piston head and the cross-sectional area of the main plunger are determined or selected according to the pressure that is applied in the liquid in the secondary container, such as that when a limited amount of stress is applied to the main ram to create a build-up of pressure in the fluid in the extrusion chamber, the interfacial pressure created between the annular hand on the end face of the piston and the end face of the main ram will always be greater than that Pressure generated in the liquid in the extrusion chamber and such that when full load is on. the main ram is applied to effect extrusion of the compact under a pressure of the liquid in the bore of the extrusion chamber and the direct axial load applied by the piston to the compact, the interfacial pressure developed between the annular rim on the end face of the piston and the end face of the main stem result in less

BATH ORIGINAL

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is than the pressure in the liquid in the extrusion chamber whereby, when the compact is extruded, liquid from the bore of the extrusion vessel through the passageway in the piston into the recess in the end face of the piston head flows into it, the liquid then between the annular Eand on the Bndfläche of the Piston head and the opposite end surface of the main tappet flows out, the liquid then from the closed Hingraum is emptied, which between the opposite end surfaces of the main plunger and the head of the piston is formed.

Hydrostatic extrusion devices are now used described in more detail with reference to the drawing reproducing the invention, for example, namely shows

1 shows a longitudinal section of an embodiment of a J.

Device according to the invention, Fig. 2 is a longitudinal section showing a modification of the

Fig. 1 shows
Fig. 3 is a longitudinal section showing a second modification

the Fig. 1 reproduces,
4a and 4b each show a longitudinal section of corresponding parts of a second embodiment of an inven-

inappropriate device, Fig. 5 shows a cross section along the line V-V in Fig. 4, while

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Fig. 6 shows a modification of the in Figs. 4a and 4b shown • . set device reproduces.

In i "ig. 1 an extrusion chamber 1 is shown, which has a longitudinal bore 2. A secondary cylinder 5 with its bore 4 is coextensive with the bore 2 of the chamber 1 appropriate. A main ram 5 is inserted into the bore 4 of the cylinder 3 and is slidably sealed therein by a Copper miter ring 6 and a rubber O-ring 7. The main ram 5 is in sealed connection with a cylinder 8 fitted, which has a bore 9. The cylinder 8 is mounted on a cross head 10, which is also the main slide 5 carries. The component group of the plunger 5, the cylinder 8 and the cross head 10 is relative to the fixed otrangpreßkanimer 1 and to the secondary cylinder 3 axially movable. The btüßel 5 is in cooperation with the Z; flinder 8 by a copper miter ring 11 and a Gurami-0-ring 12 sealed. A hydraulic ram 13 works in the cylinder 8. An auxiliary retainer cylinder 14 is connected to the cross head 10 by means of a shaft 15.

An extrusion nozzle 16 is fixed in the outer end of the bore 2 in the extrusion chamber 1. The nozzle 16 is on one Back plate 17 attached and durcheinen in the bore 2 of the chamber 1 Copper miter ring 18 and a rubber O-ring 19 sealed,

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A piston 20 is inserted into the bore 2 of the chamber 1. The main plunger 5 is or presses on one Head 21 on piston 20.

An outlet or passage ring / bleed ring / 22 surrounds the piston 20 in the cylinder 3. The passage ring has a inner cylindrical surface 23 which contacts the surface of piston 20, so / ie an outer frustoconical surface 24, which have a complementary truncated cone surface cooperates in the end of the bore 2 in the extrusion chamber 1 · The passage ring 22 is in the bore 4 of the cylinder 3 through. a copper miter ring 26 and a 3-ummi-O-Hing 27 sealed.

A longitudinal Durciigangsweg 28 in the main slide 5 connects the bore 4 of the 3 cylinder 3 with the bore 9 of the cylinder ö.

Upon actuation of this embodiment of the device a compact / billet / 29 is held in position within the bore 2 of the extrusion chamber 1 to pass through the nozzle 16 to be extruded therethrough.

Initially, the front end of the piston 20 is spaced from the rear end of the compact 29. Hydraulic fluid 30 surrounds the compact 29 in the bore

₈ AD

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of the extrusion chamber 1. Hydraulic fluid 30 also fills the bore 4 of the cylinder 3 and the bore 9 of the cylinder

The tappet 13 is actuated to increase the hydraulic fluid 30 in the bore 9 of the cylinder 8 to a constant pressure (for example 80 tons per square inch). The component group of the cylinder 8 and the main ram 5 is attached in such a way that it can be moved with the cross head 10 towards the fixed cylinder 3 and the extrusion chamber 1 into it, in such a way that the hydraulic fluid 30, which surrounds the compact 29 in the bore 2 of the iitrangpreßbehältsrs 1, is pressurized. A pressure of, for example, 200 tons per square inch (200 tons per square inch) is generated in the hydraulic fluid 30 surrounding the compact 29. The pressure that is generated in the hydraulic fluid 30 in the bore 9 of the cylinder 8 is transmitted to the fluid 30 in the bore 4 of the cylinder 3 through the longitudinal passage 28 in the main tappet 5. The pressure of the liquid 30 in the bore 4 of the cylinder 3 acts on the Eniläne of the passage ring 22 to the

Frustoconical surface 24 of the ring 22 against the Kegelatumpffläche 25 in the end of the bore to force 2 Strangpreßkammer 1 and to press, whereby a contact pressure between the inner cylindrical surface 23 of the Durchlaßr Inge 22 and the surface of the piston is caused 20 · The Durohlaßring

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is dimensioned so that when the full load of the main ram 5 is applied, the contact pressure generated between the inner cylindrical surface 23 of the passage ring 22 and the surface of the piston 20 is slightly less than the pressure generated in the hydraulic fluid 30, which surrounds the compact 29 in the extrusion container 1, ^ ieim. for example

Apply
a / the full load or force of the plunger 5 generates a pressure of 200 tons per square inch in the liquid 30, which is located in the extrusion chamber 1, the passage ring 22 is dimensioned so that a contact pressure of 195 tons per square inch between the inner cylindrical surface 23 of the passage ring 22 and the surface of the piston 20 is caused. Under these circumstances and conditions, liquid can flow from the bore 2 of the extrusion chamber 1 into the bore 4 of the cylinder 3 between the inner cylindrical surface 23 of the passage ring 22 and the surface of the piston 20.

When the device is in operation, a portion of the load on the plunger is held back or held back by the retaining cylinder 14, during the bridge in the liquid 30, which the compact 29 surrounds in the extrusion chamber 1, increases.

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The amount "or the extent of the load on the main ram 5, which is held back, is regulated" so that "the final pressure which is reached in the liquid 30 in the otrangpreßkammer is somewhat lower than the contact pressure of the passage ring 22 with the Piston 20 is. In the above example, in which the between the passage ring :; 22 and the piston 20 generated contact pressure is 195 tons per square inch, the holding back of the load on the plunger 5 is regulated so that a final pressure of 190 tons per square inch is produced in the liquid 30 in the pressure chamber 1. Under these circumstances and conditions, leakage or leakage of liquid from the transverse precursor 1 is prevented. The restraint of the load on the plunger 5 is now released, and the pressure of the liquid 30 in the extruded karamer 1 rises to the operating pressure (eg 200 tons per square inch), which is higher than the pressure between the contacting surfaces of the passage ring 22 and the piston is (e.g. 195 tons per square inch). Consequently, liquid seeps from the otrangpreßkammer 1 into the cylinder 3 between the contacting surfaces of the passage ring 2.1 and the piston 20, or when liquid seeps from the extrusion chamber 1 in this way, the piston moves 20 into the bore 2 of the extrusion chamber 1 and comes into contact with the end face of the compact 29.

ßAD ORIGINAL

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Upon contact of the piston 20 with the end surface of the compact 29, a portion of the load on the piston 20 is applied directly to the compact 29, and the pressure in the liquid 30 surrounding the compact 29 falls by a small amount. Jedoeli, the pressure in the liquid 30, which surrounds the compact 29, remains so high that a seepage of liquid from the extrusion chamber 1 continues, so that the compact 29 through the nozzle 16 through the 'action of the pressure in the! Liquid 30, which uiägibt the compact 29, and the direct axial load, which is applied or transmitted to the compact 29 by means of the piston 20, is extruded. When the extrusion of the compact 29 proceeds, the piston 20 moves into the bore 2 of the extrusion chamber 1 while contact with the rear end surface of the compact 29 is maintained. Even during extrusion, the main ram 5 moves into the bore 4 of the cylinder 3 and maintains the required load on the piston 20. When the main tappet 5 moves into the bore 4 of the cylinder 3, fluid 30 is transferred from the bore 4 of the cylinder 3 into the bore 9 of the cylinder 8 through the longitudinal passage 28 in the main tappet 5.

The prescribed apparatus has several advantages, particularly when used for hydrostatic extrusion used at high pressures in the extrusion chamber will. First, when the extrusion of the compact 29

109814/0593 bad OBiGiNAi.

in front of you ^ eht, HoclidrucKilüssigkeit too jtraiigpressbehältor 1 away, and when the. extrusion of the PreiBlin ^ s 29 almost is complete or finished, little high-pressure liquid remains in the extrusion chamber 1, so that the dangers of becoming free an outbreak or a surge of high pressure fluid during the last stages of the pressing process of the compact can be avoided.

Second, only the compression chamber 1 needs against the to be able to withstand very high extrusion pressures. the Cylinders 3 and 8 are subjected to pressures that are substantially less than the extrusion pressure, and thus that Avoid the need for a number of high pressure vessels.

Third, the piston 20 is subjected to an axial load equal to the extrusion pressure and is therefore subject to failure by rupture, but when the piston is surrounded by fluid under pressure in the cylinder 3, the pressure of that fluid provides a lateral support force for the piston 20, which makes it more resistant to breakage under the high axial load.

FIG. 2 shows a modification of the device shown in FIG. In Fig. 2, the extrusion chamber 1 is of composite / segmented / construction, for example having six segments 31 which are in contact with each other

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Have surfaces, with the segments 31 having a shrink fit or a neat fit in a solid outer container ring (not shown). The chamber 1 ″ has a tubular liner 32 which has an inner cylindrical hand 33 which surrounds the piston 20. The end surface 34 of the liner 32 has a truncated cone shape. A passage ring 35 surrounds the piston 20 in the secondary cylinder 3. The through! afcr ing 35 v / eist a Bohruru 36, which extends into an inner truncated cone λ flat 37, complementary and cooperating with the truncated cone end surface 34 of the lining 32. The passage ring 35 is in the bore 4 of the cylinder 3 by a copper miter ring. 38 and a rubber O-ring 39. The actuation of the Vo direction is the same as described above in relation to FIG. 1, but in the case of the modification of FIG. 2, the pressure of the hydraulic fluid acts 30 in the bore 4 of the cylinder 3 at the end face of the passage ring 35 »to press the inner cone section .fflache 37 of the passage ring 35 against the cone end face 34 of the lining ™ 32, whereby a Contact pressure between the inner cylindrical edge 33 of the liner 32 and the surface of the piston 20 is generated. The passage ring 35 is again dimensioned so that a contact pressure, somewhat less than the pressure which is generated in the liquid 30 surrounding the compact 29 in the chamber 1, between the inner hand 33 of the liner 32 and the surface of the piston is caused or generated. Therefore, liquid can flow from the chamber 1 during the extrusion process

1098U / 05S3

into the cylinder 3 between the edge 33 of the liner 32 and seep into the surface of the piston 20. The liner 32 is also in the bore of the chamber 1 also axially compressed by the passage ring 35, see above the extrusion / outwards extrusion / of the lining 32 from the bore of the chamber 1 is prevented.

fc Fig. 3 shows a second modification of the in Fi. 1 device shown. In Fig. 2, the piston 2C is in the bore 2 of the otrangpreßkammer 1 by a copper miter ring 40 and a rubber o-ring ^ 41 sealed. !A Passage ring 42 is mounted in a counterbore or countersunk bore 43 in the end of bore 2 of chamber 1. The passage ring 42 has an inner cylindrical rim 44 which contacts the outer surface of the nozzle 16, the nozzle 16 is mounted on the back plate 17 independently. The passage ring 42 also has an outer truncated cone end surface 45 which a complementary truncated cone end face 46 at the base of the counterbore 43 in the bore 2 of the extrusion chamber 1 touches. The chamber 1 is provided with auxiliary displacement cylinders 47.

The operation of the device is essentially the same again actuation of the device of FIG. 1, as described above. However, in the case of the modified device, as shown in Fig. 3, the Straugpreükauiier 1 by the auxiliary displacement cylinder 47 is loaded, so the outer

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To load the end face 48 of the passage ring 42 against the nozzle rear plate 17, so the Durciilaisring * '42 is loaded, 30 dcß its outer truncated cone en'dfläche 45 against the complementary truncated cone end face 4b in the end of the bore 2 of the container 1. Thus, a contact pressure between the inner cylindrical hand 44 of the passage ring 42 and the outer surface of the nozzle 16 is produced. Depending on the dimensions of the throat ring 42, a load is applied by the auxiliary displacement cylinders 47 so as to create a contact pressure between the inner hand 44 of the throat ring 42 and the outer surface of the nozzle 15, somewhat less than the pressure shown in FIG of the liquid 30 is generated, whatever the compact 29 in the chamber 1 may be. Thus, during the extrusion of the compact 29, liquid seeps from the canter 1 between the inner hand 44 of the Dureiilaßringes 42 and the outer surface of the nozzle 16.

Although the modification of FIG. 3 is described in relation to the apparatus of FIG. 1, the arrangement of FIG. 3 can be used for extrusion at lower liquid pressures in the chamber 1 by direct loading of the piston 20. In this case, the load that is applied to the piston must again be sufficient to achieve the required pressure in the liquid in the chamber 1 and also to apply a direct axial load to the compact.

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In the l? Ign. 4a and 4b is a fixed cylinder 100 shown, which has a Län._ sbohruns 102, which opens at one end into a cylindrical housing 103 with a larger diameter. A master cylinder 104 is inserted into the Bore 102 of the cylinder 101 is introduced and slidably sealed therein.

As shown in Fig. 4b, the main piston

104 mounted in sealed connection with a cylinder 105, ./elcher has a longitudinal bore 106. The cylinder

105 is mounted on a cross head 107, which is also the main piston 104 carries. The component group of the piston 104 of the cylinder 105 and the cross head it 107 is rÜJeativ to the fixed Cylinder 101 is axially movable. The piston 104 is in cooperation with the bore 106 of the * cylinder 105 by a Copper miter ring 108 and a Guinmi-0-Bing 109 sealed. A main hydraulic ram 110 is operative in the bore 106 of the cylinder 105. An auxiliary cylinder 111 is with the Cross head 107 connected by means of a shaft 112.

V. ^r ie in FIGS. 4a and 5, an extrusion container 113 is mounted in cylinder 101 within housing 103. The extrusion container 113 is provided in segment construction, which has six segments 114-, which

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having contacting radial surfaces 115. The segments 114 are contained in an outer sleeve 116 and form one -Bore 117, with an inner lining sleeve 118 is provided. An annular plate 119 seals the inner End faces of the oegmente 114. The outer sleeve 116 of the container 113 is of a smaller diameter than the inner diameter of the housing 103 so that an annular space 120 between the sleeve 116 and the inner bore surface of the housing 103 is formed. A copper miter ring 102 and a rubber O-ring 122 seal between the sleeve 116 and the inner bore surface of the housing 103 at the outer end of the annular space 120. An extrusion nozzle 123 is in the outer end of the bore 117 i; Container 113 attached. The nozzle 123 is on one Backplate 124 is mounted and secured in bore 117 of container 113 through a copper miter ring 125 and a G-umni-O-ring 126 sealed.

A secondary piston 127 is inserted into bore 117 of the container 101 introduced and slidably sealed therein. The piston 127 has a head 128 of greater diameter than the diameter of the piston 127, the head 128 of the piston 127 having an annular surface 129 which the pressure of the Hydraulic fluid in the bore 102 of the cylinder 101 is exposed. The end face of the head 128 of the piston 127 has a fishy recess 130 which is surrounded by an annular rim 131. A copper sleeve 132 seals between the

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Head 128 of piston 127 and the end of main piston 104 away. The sleeve 132 encloses an annular seepage space 133, which is formed between the head 128 of the piston 127 and the outer surface of the main piston 104.

shlh longitudinal passage 134 iia secondary piston 127 connects the recess in the head 128 of the secondary piston 127 with the bore 117 of the container 113. Sin öicker passage

135 in iiauptkolben 104 extends from 133 .jickerraum forth ν hich ζ regard to the head 128, '127 and piston deo aer jiinJCläche of Kauptkoibens 104 is formed. One straight through _o ... away

136 in the main piston 104 connects the bore 102 of the cylinder

101 with the bore 106 of the cylinder 105.

When the device described above is operated, a rebling 137 within the B υ ;. tion Ί17 of the container 113 in position in order to pass through. uie nozzle 123 hi.i: durcr _: i5traii _tl pressed ^{outside) 1} . Hydraulic fluid 138 in the bore 11 / ■ of the container 113 surrounds the pressure 137. The hydraulic fluid 138 also fills the bore 106 of the dylid 105, see B.

102 of the cylinder 101 and the Rin ^ raun 120, aer aeu. ^ e 113 in the housing 103 of the cylinder 101 _{um 0} ibt.

The main tappet 110 is actuated to release the hydraulic fluid Speed 138 in the bore 106 of the cylinder 105 to a constant Increase pressure. The pressure of the hydraulic fluid

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1b52604

138 in the bore 106 of the cylinder 105 is applied to the hydraulic fluid 138 in the bore 102 of the cylinder 101 through the longitudinal passage 136 in the main piston 104 transmitted therethrough. If the liingraum 120, which the container 113 in the cylinder 101 surrounds, is connected to the bore 102 of the cylinder 101, the hydraulic fluid 138 in the hanging space 120 becomes the same Pressure as the fluid 138 in the bore 102 increases. Of the Pressure of the hydraulic fluid 138 in the space 120 acts on the outer sleeve 116 of the container 113, by one radially inward directed force / radially inwards supporting force / to the segments 114 of the container 113 to apply.

The assembly of cylinder 105 and main cylinder 104 is assembled to align with the crosshead 107 can be moved towards the fixed cylinder 101. The main piston 104 therefore loads the secondary piston 127 into the bore 117 of the container 113 in order to put the hydraulic fluid 138 under pressure, which the compact 137 in the bore 117 of the container 113. Initially, a portion of the load applied by the main piston 104 to the secondary piston 127 is applied v / ii-'d, retained by the auxiliary cylinder 111. A certain maiden of restraint / degree of hold back / is applied to the main piston 104, such that the pressure which is in the liquid 138 in the bore 117 of the container is slightly less than the pressure required to carry out a simple hydrostatic extrusion of the compact 157 through the nozzle 123 therethrough.

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The pressure of the liquid 138 in the bore 117 of the container 113 is increased through the longitudinal passage 134 in the piston 127 through to the hydraulic fluid in the recess 130 which is formed in the head 128 of the piston 127. The device is constructed so that under these operating conditions the interfacial pressure / interfacial pressure /, which is between the annular rim 131 on the piston head 128 and the end face of the piston 104 is higher than the pressure of the liquid 13 & in the bonrun ^ 117 des Container 122 is. As a result, the interface pressure between the rim 131 and the end face of the piston 104 is higher than that Pressure of the hydraulic fluid in the recess 130, and fluid cannot over the edge 131 of the recess 130 seep out. Consequently, at this point of actuation the system is in stable equilibrium, und.the compact 137 is not extruded.

The retention of the auxiliary cylinder 111 on the main piston 104 is now released or released, so that the main piston 104 applies an increased load to the secondary piston 127. Therefore, the pressure of the hydraulic fluid 138 in the bore 117 of the container 113 increases, and it follows that the pressure of the hydraulic fluid in the recess 130 in the piston head 128 also increases by the same value. The device is arranged so that under these operating conditions - with the full load of the main piston I04 on the secondary piston

1098U / 0593 bad original

127 applied - the interface pressure, which between the annular edge 131 on the head 128 of the secondary piston 127 and the! -Jndflache of the main piston 104, is lower than the pressure of the hydraulic fluid in the recess 130. As a result, hydraulic fluid seeps from the recess 130 via the hand 131 into the thick space 135 and vents / vents / through the passage 135 in the master cylinder 104 to the atmosphere. is öo..iit hydraulic fluid 138 from eggs 3oi. ~ "i'ung 117 of the container 113 discharged forth through the Durcii ₀ angsweg 134 in lekundärbehiilter ... 127. The Sekunäärivolben 127 moves in the bore 117 of the container 113 in until it touches the end surface of the compact 137, when a share of the load of the piston 127 is applied directly to the I-reßliiig 137th at this point, the pressure drops in the hydraulic fluid 138 which ibt the Preilin ^ 137 usi in the container 113 _and, slightly but remains high enough to allow the liquid to continue seeping through the hand 131 on the head 127 of the λ

Ensure piston 128 addition. The compact 137 is subjected to a system of stress or force which arises from the pressure of the hydraulic fluid 138 in the container 113 and the direct mechanical load that is applied to the compact 137 by the piston 127. The force system generated in the compact 137 is sufficient to effect extrusion of the compact 137 through the nozzle 123. As the extrusion of the iron is in progress, hydraulic fluid 138 continues to seep from the bore 117 of the container 113

1098U / 0593 ^8AD

- ^2ß - 1bS2604.

Passage 134 in secondary piston 127 through, boiuit the secondary piston 127 moves into the bore 117 of the Behr'lter 113 into it and maintains continuous contact uit of the end face of the compact 137 upright when the compact

137 is extruded. The main piston 104 follows the movement of the secondary piston 127, with hydraulic fluid 138 from the bore 102 of the cylinder 101 into the bore 106 of the cylinder 105 is transmitted through the longitudinal length path 136 in the main piston 104.

For the operation of the above-described device, it is a requirement that while restraint is imposed on the main piston 104 by the auxiliary plunger 111, the interfacial pressure on the hand 131 on the head 128 of the piston 127 must be greater than the pressure of the hydraulic fluid 138 in FIG bore 117 of the container 122. cmgeiiiehrt, must be released when the restraint of the main piston 104 ..ird, the Zviüchen- W surface pressure at the edge 131 is less than the pressure of the liquid

138 in the bore 117 of the container 113. This requirement or this requirement is achieved by appropriately dimensioning the parts of the device.

One embodiment of the device which corresponds to the operating requirements in the manner described has the following dimensions:

BAD ORIGINAL 1098-14 / 0593

-IS-

Diameter of the bore 117 of the container 113 ... 3 "(76.2 mm) area of the annular end surface 129 of the head 128

djäs piston 127 5.58 square inches (3,600mm ² )

Area of the recess 130 in the head 128 of the

Piston 127 6.49 square inches (4o186mm ² )

Surface of the annular rim 131 on the head 128 of the

Piston 127 2.87 square inch (1.851 mm ²⁾

Diameter of the bore 106 of the cylinder 105 ··. 6.75 "(171 mm)

If the main ram is loaded such that a pressure of 50 tons per square inch is created in the fluid 138 in the bore 106 of the cylinder 105, the load of 1,860 tons is applied to the main piston 104. If 7 initially? Tons of the load on the main piston 104 are held back by the auxiliary cylinder 111, the fluid in the bore 117 of the container 113 is increased to a pressure of 190 tons per square inch, and the interfacial pressure at the edge 131 on the head 128 of the piston 127 amounts to then to 193 tons per square inch. When the restraint of the main piston 104 is released, the pressure in the liquid 138 in the bore 117 of the container 113 increases to 200 tons per square inch, but the interfacial pressure only increases to 196 tons per square inch, causing the liquid 138 to seep away from the Bore of the container 113 is permitted or made possible. The in FIGS. 4a, 4b and 5 illustrated embodiment of the device is only for the extrusion of

BAD ORIGINAL-1098U / 0593

individual compacts can be used. Figo 6 allows an alignment of the device that enables semicontinuous extrusion. The device is in the way suitable, as described in British patent applications 1982/66, Γ. 1389 / 6-6, 21390/66, 25488/66 and 25489/66.

In Figure 6 _s are parts that the! 'Rush in FIGS. 4a, 4b and 5 correspond with the same reference numerals.

see.

In the arrangement of FIG. 6, the secondary color is v / e 127 an iconically tapering nose piece 139 on which is divided into segments in that it is slit lengthways. The Uasenstüek 139 is with a rubber seal sleeve Mistake. A longitudinal passage 141 in the piston 127 is included a longitudinal passage 142 is continuously provided in the main piston 104. The head 128 of the piston 127 has a projection "143, which in a recess 144 in the surface of the main piston 104 intervenes. The projection 143 is in the recess 144 through a copper miter ring 145 and a rubber 0-B.ing 146 slidably sealed.

When using this embodiment of the device a long compact has its front end inserted into the bore 117 of the Strangpreßbehälters 101 147, through the passageways 142 and 141 in the piston 104 and 127 therethrough. The device is operated to extrude the leading end of the compact 147 through the nozzle 123.

1098 U / 0593 BAD original

The pressure of the hydraulic fluid in the bore 117 of the container 113 acts on the outside of the rubber sealing sleeve 140, which encloses the nose piece 139 of the piston 127 b: w. UM-.ibt. The sleeve 140 is pressed into a sealing connection with the sleeve 139 and the pressed part 147. Also, the oegmente the turf piece 139 are in clamping connection with each ^r .i Pre - has been liiif ^ 147 pressed \ IENN the front end of the price preform 147 extruded, the pressure in eng μ 3yste, n released so that the nose piece 139 of the piston is released from the clamping connection with the compact 147, and the piston 127 can be sucked back, uiu a new length b:.: W. to expose or place a new copy of the compact 147 in the bore of the extruded container 113.

The invention also relates to modifications of the enclosed Claim 1 uniriüserieii embodiment and relates above all on all features of the invention that individually - or in combination - in the entire

Writing and drawing are disclosed.

Claims

109814 / (1593

Claims (1)

PATENT ADVERTISER 1 6 5 id b U 4 DIPL-ING. ERICH SCHUBERT ^{Tilphone: (0271) 3M09} Telegram address: Patschub, Siegen MA postal check accounts: * AL Cologne 106931, Essen 20362 Bank accounts: Deutsche Bank AG./ ' Abs .: Patent attorney Dipl.-Ing. SCHUBBIT, 59 Siegen, Eiserner Strafte 237 branches Siegen and Oberhausen (RhId.) roenoot 325 68 013 ΙΊ / Ν3 31.M196B Claims 1. Drainage means for the controlled drainage of high-pressure fluid from the bore of a 3tran ~ nre /> chamber, characterized in that they are composed of two components, which have contacting sealing surfaces, from an escape route for fluid from the " the extrusion chamber, which is located between the contacting surfaces of the two components, as well as means which are provided for loading one of the "components" on the other, in order to create a controllable bridge between the contacting surfaces of the B- to build uteiIe. 2. Storage device for the controlled discharge of high pressure liquid from the bore of a Stran ^r nreßkammer ago, characterized in that the Stransjpreßkammer has an extrusion nozzle which is attached to one end of the bore, and a piston which is inserted into the rear end of the bore , for pressurizing liquid, which a compact in the 109814/0593 BATH ORIGINAL 165260Λ Bore of the extrusion machine surrounds, and for applying a direct axial load to the compact,; whereby the drain gown has a circular passage ring, which is attached to the rear end of the yonrun.; · ;; of the extrusion chamber · around the column , v / o in the Durclilai.'rin · ?: an inner zvliiidrische Ο "ο3Π'1 .that, v / elohe surrounds the Koloen, and a must ere KefielstuLiof- ^T V.ix" -. r ..:; sf "Before you sit down, you won't be able to do it with someone. innersn i "e"el;;:; M »n; pfoberfi- ^: -iciie at the end of the" .r-ohrua- :, «las ti jranspre ^ be ^ h '-' iters around from -? »- i; 3 3. Outside the liohruni. Der atran: V "preiikN.OEier, tim die i-ussare K '^ - 7el3'j.fflDffläche des Ourctilaldriri: es ^ e ~ en the koniplecientare in · ere lie ve i ^ tumpf surface im End of drilling ·; der Stz-t \ n ^ vTe, -:.: ■ ruffler au strain, whereby through .reaction between these surfaces the inner cylindrical surface of the ring raili!? l inwardly in contact with the surface of the piston . weighed - .; ill, vührend wiüs ^ accuracy of ^the; ohrun-; the 3tr-in -]; prel5k ".mmer vätirend etc. derj: Jiran ^r ; -pressens des: Preßlin = -s flows between the cuer surface of the KoI-benr-j and the inner cylindrical Obsrflv.che of the passage ring. 3. Ablaldvorrichtun. ^ A controlled discharge of oohdruckflusöiftkeit from the -ohrun / i of an extrusion chamber, characterized in that that they have a tubular shape in their bore having, wherein a Bfcrangpreßwerkzeur; in one end of the 103 8 H ..- 06 8 3 _b ad klsittim. · 5-ri. "vebra -"! ha χ · -: ΐ and an i.'ol.: - eii in the c-.niere niiibere iinae der ¹ Av ^ kIe ictiin ': e: Li- ^- 3 .rac '.: ra,: ·· ;; · ni .J: .uc ^ .: hsav.f sc-ia;' 3n from ^: 'llis3i:' ^ eit, ..elane eLnsn / rerun- i :: . the lining of the soranf: - nre ^^ umer bore vjsrivt, im: ·, si.iia applying a direct axial><Girs'jun"· ^ri .uf den r? rei" ilir, -o./^i the V- jl & fcriittel a kreioi'Ör-:;: i - :; en Dnrchlaiirinr; zvJ: ei ^ en, egg at the bottom ϊηαβ of the bore of the 'tran ~ Oreßkainmer around the Iolben a - \ c? e uraont ίί, ΐ, .vooei die luskieiäun ™ βχη, ϋϊΐ inner Z7 ^r Iirr ^; risehen "tand on v / eist, which surrounds the piston at the rear ^% : hide the ears of the strand ^ prefikarircar- ict, and ". .οbei the Endooerf'lvche of the liner near the through-Ie riii" * eist a äuüere serelstLimoxt'orm AUFR /, wherein ^the: ohrun ■ "· the Ouroala:;. es rinr in elro indoberf laugh from the inner core: els do "^ f form into a stretch, which is complementary with the core of the lining of the lining and works together with it, whereby i ifctel provided bind to the rin ^ en a burden on aie jjrdfl; ^: che des DurchlsSrin-es e.uilerhalb the bore; the Stranvpreßkaiiunsr to the inner Ee-: ^el.i:: u ^n: IPF EL doberf pool of Durchlaßringes -e ^ s the ^'-: .ußere Ke ^ el.stuinof-Sndoberfläehe burdening the liner, zv by reaction / iachen these surfaces, the inner cylindrical edge of the liner radially inwardly into contact with the surface of the piston load is, wherein liquid ohrun-, of ^which: ·: the strand he chamber forth flows e ^ during the extrusion of the molding, happens between the surface of the piston and the inner cylindrical sand of the liner » 4. Ablaßvorrichtun. ^ According to claim 2, characterized _f that the means for applying the required load on the jindfle.che of the Du rc h la. ring outside the \ Oi1run3: line up the .fürangnreßkaramer a second back, coextensive with the otri.n-Ti) rei? .ka !! inier, from v / elciiem der EoIcen to the rear linden aer) 0lirun "· der ■ · bran" ore ..'- kaPiKsr einrceorac-rs /; ird, and ^: ittel sum Druckbeaufsehlr -en der .'llisßi ^ lreit in aer ".-ohnm.-.- des Sakund 'rooh-'Icery, v.'coei öer Durehlaßrinr wa his Lluirere ~ ^: zat & n ~ s ±' lähe around in aer "ohrun-T des oekundrrl: ehklters aacsdielioet is. 5. Ablaijvorrichtunc: nnch Aiisvriioh 3, thereby kemiichnet, dai; the: '. ittel sum application of the necessary part load on the end surface of the passage ring 3 outside ο the bore of the "tranTpreibehälters a secondary" rbe ^l i "li; he coextensive eggit of the: itran: * pre:! ikaraner, from which the Koloen in the rear end of the T-hole of the otran- ^ preinkammer is introduced, and has a means for subdressing the liquid in the Dohrun. 0.3ε ^^ kuaid ^ rbehy.lter,. -ohrun.'T of the secondary container is sealed. 6. Drainage device for controlled drainage of high pressure fluid from the bore of a. ^ extruded container, thereby characterized that this at one end of the Bohrun with a VtrangpreßwerkzeuiT is equipped and has a piston that inserted into the other rear end of the bore for pressurization of liquid, which surrounds a compact in the bore of the extrusion chamber, and sum attachment of a direct axial 1098U / 0693 BAD - ¥ - ... ■ '■■■■. ■■■■ "! elasticity on the pressed part, where the release means an opening ring have, who eats attached around the press nozzle, wherein The throat ring - an inner cylindrical "" land which contacts the outer surface of the ripping tool, and an outer surface on v / e which is tied with an inner surface. el-3tumpo.surface around the! '. inde the lohrunr: the otrang / oreiDkeimner around is koirrolementär and cooperates with it, where JL ^r it "are provided for applying a load to the inner surface of the' passage rings' outside the hole der Stran ^ prol.; karamer, around the outer ^{lying 1st 1} JJnDf ο be rf lache des Durchle.ßrin ^ es against the - inner frustoconical surface to the end of the --iohrung rftrang-Oreßkamaier around to oelasten, ^v - ^r ^ obel by reaction between these 'Surfaces of the inner cylindrical hand Ourctilaßringes radially inwardly in Eontakt RALC the outer surface of the molding die charged -yird, ..W üiret- £ \ J ¹ d ¹ IUssi- \ ness that of eggs! Bore of Snrangpreßkammer forth during extrusion of the compact seeps through between the outer surface of the compression nozzle and the inner cylindrical edge of the liner. . 7. Apparatus according to claim 6, characterized in that the extrusion die is mounted independently on a flange plate separately from the extrusion chamber, and that means are provided for loading the extrusion chamber towards the end plate, so that the end face of the passage ring "outside-the bore of the The extrusion chamber is loaded against the end plate to reduce the load 1Q98U / 0593 BADOR ₁ GINA ^ of the passage ring necessary for the controlled discharge of liquid from the 'Sohrung of the extrusion chamber' is. ". 8. Device for the hydrostatic extrusion of a compact from an extrusion chamber through a press nozzle, characterized in that the press nozzle is attached to one end of the bore of the Sbrangpreßkammer that a secondary liquid container with its bore is arranged kqextensiv with the bore of the otrangpreßkammer, that a piston is introduced into the rear end of the extrusion chamber from the secondary fluid container j that a hatip plunger of a larger diameter than the diameter of the piston is introduced into the rear end of the secondary fluid container v, i *; above the piston has a cylindrical head with the same diameter as the main tappet, that the end face of the piston head has a raised annular rim, whereby a recess is formed in the end face of the piston head, the front end face of the main tappet rests against the annular rim on the piston head, the annular rim on the end face of the piston head is radially spaced from the edge of said end face, that means are provided which seal between the main tappet and the piston head, whereby a closed or closed annulus between the opposite end faces of the main tappet and the head of the piston, with the closed annular space forming the ring 109814/0593 Sg V surrounding the shaped edge on the end face of the piston head, with a piston having a passage therethrough which leads from the bore of the extrusion container to the recess in the end face of the basket head, from means for pressurizing liquid in the bore of the secondary container, 'from means for applying a "controllable load on the main ram, whereby the .Kolben is loaded to put the liquid under pressure, which surrounds a compact in the T3ohrung of the extrusion container, and a direct axial load on the compact in the extrusion chamber and of means for emptying the liquid from the closed annular space which is formed between the opposite end surfaces of the main tappet and the head of the piston, the cross-sectional area of the extrusion chamber, the surface of the annular rim on the end surface of the piston head, the surface the recess in the end face of the piston enkopfes and QuerschnitiBfläche main slide according to the pressure determined or be chosen ψ, which-in is applied to the liquid in the secondary container such that upon application of a limited degree - of load on the main slide, to a pressure buildup in the liquid in the Strangpreßkammer cause the interfacial pressure created between the annular hand on the end face of the piston and the end face of the main ram is always higher than the pressure created in the liquid in the extrusion chamber and such that when full load is applied the. Main ram is attached to the extrusion of the compact un- 1098 H / 0593 '. 6ADORiQiNAu under a pressure of the .liquid in the Hohrun ^ the stran? pre. ^The interfacial pressure between the ring-shaped hand on the end face of the piston and the surface of the main ram results in the direct axial elasticity applied by the piston to the compact In-ier than the pressure in the liquid in the extrusion chamber, whereby, when the pellet is squeezed, liquid from the bore of the extrusion container through the passage in the piston therethrough into flows into the recess in the Endfläche- of the piston head, wherein the liquid then iand 7 between the annular on the end face of the piston head and the opposite end face of the main slide flowing, with the liquid then under the contract "iinTraum emptied v» ^r ird, which is formed between the opposite end surfaces of the main shaft and the head of the piston. 1098H / 0593 _B AD