US3550199A - Press for treating products under high pressure - Google Patents

Press for treating products under high pressure Download PDF

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Publication number
US3550199A
US3550199A US781543A US3550199DA US3550199A US 3550199 A US3550199 A US 3550199A US 781543 A US781543 A US 781543A US 3550199D A US3550199D A US 3550199DA US 3550199 A US3550199 A US 3550199A
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US
United States
Prior art keywords
cylinder
press
high pressure
stand
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US781543A
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English (en)
Inventor
Torstein Landa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3550199A publication Critical patent/US3550199A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
    • B30B11/002—Isostatic press chambers; Press stands therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses

Definitions

  • a press stand has upper and lower yokes between which a high pressure cylinder with removable end closures can be inserted when supported -by a movable stand.
  • the space between the yokes is slightly greater than the length of the cylinder when the end closures are fully inserted.
  • the present invention relates to a press with a preferably vertically arranged high pressure chamber having a high pressure cylinder, end closures projecting into this cylinder and a. press stand to take up the axial forces exerted on the end closures by a maxim-m under high pressure.
  • Presses of the type mentioned are used, among other things, for isostatc compression of powder bodies, resistance elements, and the like at pressures in the region of 1000-10,000 bar.
  • the cylinder is supplied outside the press stand with components to be treated, and then inserted in the press stand and supplied with pressure medium; It is then removed after treatment and emptied outside the press stand.
  • the pressure chamber is axially displaceably Suspended and at least one Operating cylinder having an Operating piston is placed below the high pressure cylinder.
  • This Operating piston lifts the lower end closure and the high pressure cylinder in relation to the press stand when the Operating cylinder is supplied with pressure medium so that the end closures are returned to their innermost positions in the cylinder.
  • the lower end closure is resiliently Suspended in the cylinder and is suitably supported 'by a number of spring units Suspended in the lower end surface of the cylinder. ln one embodiment the spring units are completely or partly inset in a ring which supports the end closures.
  • the spring units are usually made up of a number of plate springs.
  • the operating cylinder may consist of a cylindrical bore in the end closure.
  • the piston in the Operating cylinder may be supported by spring units Suspended in the end closure and may even comprise return springs for the return of the piston.
  • This spring. unit is also made up of plate springs.
  • the high pressure cylinder is provided with lugs at its ends, in which are bushings 01' other guide means which can slide along a guide on a stand.
  • the invention is extremely useful *for press means of the type containing a cylinder Suspended on a stationary press stand and a press stand arranged movably on a track so that it can be moved between an Operating position in which the centre lines of the press stand and the cylinder substantially coincide and a position in which the cylinder is completely outside the press stand.
  • FIG. 1 shows a side View of a high pressure chamber supported by a stationary stand and a movable press stand in a position right outside the high pressure cylinder.
  • FIG. 2 shows an end view and FIG. 3 a section taken along B-B according to FIG. 2 and in a position of the press stand when the high pressure chamber is in the opening of the press stand.
  • FIG. 4 shows a section through the lower part of the cylinder and the lower end closure.
  • FIG. 1 designates a stand supporting a high pressure cylinder 2.
  • the cylinder 2 is provided with two lugs 5 having journalling surfaces fitting the rods 4.
  • the distance between the outer surfaces of the lugs 5 is less than the distance between the inner surfaces of the lugs 3. This means that the cylinder is axially displaceable the same distance as the difference in distance between said surfaces.
  • the cylinder normally rests on the lower lug 3 so that a gap '6 is for-med between the upper lugs 3 and 5.
  • the cylinder 2 is sealed by an upper end closure 7 and a lower end closure 8 which which projects a certain distance into the cylinder.
  • the upper end closure is provided with a ventilation channel 9.
  • the lower end closure is resiliently Suspended in the cylinder 2 ⁇ by means of a number of spring units 10, each constructed of a number of plate springs, bolts 11 which are screwed into threaded holes 12 in the lower flange or end surface of the cylinder 2, and a support ring 13 having a flange 14 abutting a flange 15 on the lower end closure 8.
  • the cylinder is in communication with a pressure medium source not shown in the figures.
  • the prestressing of the spring units should at least correspond to the weight of the end closure plus the weight of the hydraulic medium and other contents of the cylinder when this is not under pressure.
  • the press means comprises a displaceable press stand 22 supported by the wheels 23 running on rails 24 set into the floor 25.
  • the press stand is of the type consisting of an upper yoke 26, a lower yoke 27, a pair of spacers 28 held together by a prestressed tape sheath 29. The press stand is displaced between the positions shown in FIGS. 1 and 3 by means of an Operating cylinder 30.
  • the opening of the press is somewhat higher than the distance between the end surfaces of the end closures when completely inserted.
  • the cylinder is fixed at such a height that the clearances 33 and 34 between the yoke of the press stand and the end closures of the cylinder are approximately equal.
  • the press operates in the following manner:
  • the cylinder 2 is supplied with material, upper end closures are inserted and the press stand is displaced from the position shown in FIG. 1 to that shown in FIG. 3.
  • the cylinder is filled with pressure medium through the channel 16 and emptied through the channel 9 and a ValVe means, not shown.
  • When the cylinder is filled the valve is closed and the pressure increased to the desired level.
  • the end closures 7 and 8 are thus pressed outwards towards the yokes 26 and 27 which take up the pressure forces Operating on the end closures.
  • the stand is deformed so that the end closures are displaced even further outwards.
  • the stand returns to its original height and the end closures are returned a short distance into the cylinder.
  • the piston 18 Upon continued supply of pressure medium, the piston 18 simultaneously lifts the lower end closure 8 and the cylinder so ⁇ that the upper end closure 7 which is in contact with the upper yoke 26 is pressed into the cylinder until it reaches its innermost position. The supply of pressure medium is then stopped and the bore 17 is placed through the channel 31 in communication with the collecting tank for pressure medium.
  • the spring unit 19 returns the piston 18 to ⁇ the position shown in FIG. 4 in relation to the lower end closure.
  • the whole cylinder moves downwards until the movement is stopped by the lower lug S on the cylinder meeting the lower lug 3 in the press stand.
  • the piston has been completely returned to its inner position there are again i gaps 33 and 34 ⁇ between the yokes and the end closures.
  • the press stand can now be returned to the position shown in FIG. l, the upper end closures are removed, the components taken out of the cylinder, after which this can be supplied with fresh material and the Operating cycle is repeated.
  • the invention is not limited to the embodiment shown. Several variations and modifications are feasible within the scope of the following claims.
  • the Operating cylinder for pressing in the end closures may, for example, 'be placed in the lower yoke of the press stand,
  • Press for treating products under high pressure comprising a high pressure chamber comprising a vertical high pressure cylinder having end closures projecting into the cylinder, a press stand having a daylight opening somewhat larger than the length of the high pressure chamber when the end closures are fully inserted, which stand surrounds the high pressure chamber during the compression operation and takes up the axial forces which a pressure medium in the pressure chamber eXerts on the end closures, and means for supporting the pressure chamber in a position in which gaps are formed between the press stand and the end closures of the chamber when these end closures are inserted to their innermost positions in the cylinder, in which said supporting means includes means allowing the high pressure cylinder to be axially displaced and the press comprises at least one Operating cylinder located under the high pressure cylinder and having an Operating piston which lifts the lower end closure and the high pressure cylinder in relation to the press stand when pressure medium is supplied to the Operating cylinder, so that the end closures regain their innermost positions.
  • Pressure means according to claim 2 in which the piston is supported by a spring unit suspended in the end closures.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Press Drives And Press Lines (AREA)
US781543A 1967-12-11 1968-12-05 Press for treating products under high pressure Expired - Lifetime US3550199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE16941/67A SE322876B (enrdf_load_stackoverflow) 1967-12-11 1967-12-11

Publications (1)

Publication Number Publication Date
US3550199A true US3550199A (en) 1970-12-29

Family

ID=20303024

Family Applications (1)

Application Number Title Priority Date Filing Date
US781543A Expired - Lifetime US3550199A (en) 1967-12-11 1968-12-05 Press for treating products under high pressure

Country Status (5)

Country Link
US (1) US3550199A (enrdf_load_stackoverflow)
AT (1) AT281604B (enrdf_load_stackoverflow)
DE (1) DE1813403A1 (enrdf_load_stackoverflow)
GB (1) GB1249363A (enrdf_load_stackoverflow)
SE (1) SE322876B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787156A (en) * 1971-05-06 1974-01-22 Asea Ab Press for treating products under high isostatic pressure
US3827848A (en) * 1971-10-29 1974-08-06 H Massonnet Molding presses
US3833333A (en) * 1972-11-06 1974-09-03 G Britten Press construction
US3933418A (en) * 1974-05-02 1976-01-20 Allmanna Svenska Elektriska Aktiebolaget Press for treating products under high pressure
US4155476A (en) * 1977-12-21 1979-05-22 Autoclave Engineers, Inc. Hanging reaction frame assembly
EP0121627A1 (en) * 1983-01-07 1984-10-17 Kabushiki Kaisha Kobe Seiko Sho Hot isostatic press apparatus
US4514158A (en) * 1983-04-19 1985-04-30 Kb Cold Isostatic Press Systems Cips Plant for cold isostatic pressing
US4708627A (en) * 1984-07-13 1987-11-24 Kabushiki Kaisha Kobe Seiko Sho High pressure apparatus
US20150266253A1 (en) * 2012-10-15 2015-09-24 Avere Technologies Ab Arrangement and method for handling a load for isostatic pressure treatment

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787156A (en) * 1971-05-06 1974-01-22 Asea Ab Press for treating products under high isostatic pressure
US3827848A (en) * 1971-10-29 1974-08-06 H Massonnet Molding presses
US3833333A (en) * 1972-11-06 1974-09-03 G Britten Press construction
US3933418A (en) * 1974-05-02 1976-01-20 Allmanna Svenska Elektriska Aktiebolaget Press for treating products under high pressure
US4155476A (en) * 1977-12-21 1979-05-22 Autoclave Engineers, Inc. Hanging reaction frame assembly
EP0121627A1 (en) * 1983-01-07 1984-10-17 Kabushiki Kaisha Kobe Seiko Sho Hot isostatic press apparatus
US4537569A (en) * 1983-01-07 1985-08-27 Kabushiki Kaisha Kobe Seiko Sho Hot isostatic pressing apparatus
US4514158A (en) * 1983-04-19 1985-04-30 Kb Cold Isostatic Press Systems Cips Plant for cold isostatic pressing
AU567154B2 (en) * 1983-04-19 1987-11-12 Kb Cold Isostatic Press Systems Cips Cold isostatic pressing plant
US4708627A (en) * 1984-07-13 1987-11-24 Kabushiki Kaisha Kobe Seiko Sho High pressure apparatus
US20150266253A1 (en) * 2012-10-15 2015-09-24 Avere Technologies Ab Arrangement and method for handling a load for isostatic pressure treatment
US10022931B2 (en) * 2012-10-15 2018-07-17 Avure Technologies Ab Arrangement and method for handling a load for isostatic pressure treatment

Also Published As

Publication number Publication date
DE1813403A1 (de) 1969-10-16
SE322876B (enrdf_load_stackoverflow) 1970-04-20
GB1249363A (en) 1971-10-13
AT281604B (de) 1970-05-25

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