US3611517A - Multiarticle press with hydraulically biassed lower rams - Google Patents

Multiarticle press with hydraulically biassed lower rams Download PDF

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Publication number
US3611517A
US3611517A US819316A US3611517DA US3611517A US 3611517 A US3611517 A US 3611517A US 819316 A US819316 A US 819316A US 3611517D A US3611517D A US 3611517DA US 3611517 A US3611517 A US 3611517A
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US
United States
Prior art keywords
press
rams
pressing
piston
hydraulically
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
US819316A
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English (en)
Inventor
Jacob Giersberg
Albert Reiplinger
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.)
Villeroy and Boch AG
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Villeroy & Boch
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Publication date
Application filed by Villeroy & Boch filed Critical Villeroy & Boch
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Publication of US3611517A publication Critical patent/US3611517A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/04—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould
    • B28B3/06—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould with two or more ram and mould sets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/08—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with two or more rams per mould
    • 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
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams
    • B30B15/067—Press rams with means for equalizing the pressure exerted by a plurality of press rams

Definitions

  • a multiarticle press for ceramic goods has lower, hydraulically biassed rams which are connected with a source of hydraulic biassing pressure via a shuttle piston in order to lead downwards movement of the rams.
  • One known measure for instance, is to mount the lower rams of the press which support the articles during pressing on elastic underlays or to press them against elastic material; These measures compensate for unevenness in the amount of material placed in the press for each article.
  • An elastic underlay allows the mould part above it to yield so that the pressing ofthe article in the mould is carried out with the same specific pressure as that of the other articles. Differences in the amount of material charged into the mould are then reflected in small inaccuracies in thickness, which, however, are not so deterimental as an unevenness in the pressing pressure.
  • the present invention consists in an apparatus for the simultaneous pressing of articles comprising upper plungers, lower hydraulic rams for supporting the articles United States Patent "ice during the pressing, hydraulic biassing means for pressurising the lower rams so as to allow them to yield in a downward direction during pressing and return thern to their upper positions at the end of pressing, a cylinder hydraulically connected with the rams and with the hydraulic biassing means, and a shuttle piston in the cylinder for limiting fiow of hydraulic liquid, between, on the one hand, the lower rams and, on the other hand, the hydraulic biassing means.
  • a pressing apparatus in accordance with the invention can be used to achieve precisely the same pressing pressure on each mould, more particularly in the case of medium and large sizes of ceramic goods. It is additionally possible to use elastic layers between the lower rams and a lower platen of the press in order to compensate for errors in the filling of the individual moulds between the upper plungers and the lower rams.
  • the invention is applicable both to hydraulic presses in which the upper plungers are moved hydraulically and presses in which they are moved mechanically.
  • the shuttle piston can be a differential piston with opposite active faces of different areas, the small face being connected with the lower rams.
  • the apparatus can comprise a duct connecting the two faces of the shuttle piston hydraulically, and flow limiting means, for instance a check valve, in this duct.
  • the apparatus can comprise a sliding valve part arranged to be positively driven by the shuttle piston and to shut off the lower rams from the check valve hydraulically as the shuttle piston is moved by the rams during their downward travel.
  • the apparatus can comprise mechanical means such as springs for holding the lower rams in their raised positions.
  • FIGS. 1 and 2 represent longitudinal sections through a pressing apparatus embodying the invention with a control or shuttle piston in two working positions.
  • FIGS. 3 and 4 show a different form of shuttle piston arrangement in two working positions.
  • the press or pressing apparatus shown in the figures comprises a vertically moving upper press platen 1 (FIG. 1) carrying upper rams or plungers 2 which are pressed downwards on to material 3 to be pressed tilled in the mould cavities 5 of the stationary mould part 4.
  • the lower rams 6 are carried by piston 7 which in a conventional manner are carried in a cushioning part or base 8.
  • the pistons are provided with sealing piston rings 9.
  • the cavity 10, common to all the pistons 7, in the base 8 is filled with a suitable hydraulic liquid such as a hydraulic oil or water.
  • the constant biassing pressure of the hydraulic liquid forces the pistons 7 upwards so that their upper shoulders 11 about against the cover plate -12 of the base.
  • the cylinder space 10 common to the pistons 7 is connected by the duct 13 with the cylinder space 14 of the control or shuttle piston 15.
  • the shuttle piston is in the form of a difierential piston with opposite active faces of different areas.
  • the larger face or side 19 of the diiferential piston 15 is pressurised by a source (not shown) of biassing hydraulic pressure.
  • This source of pressure is also connected by the bypass duct 16 and the check valve 17 with the cylinder space 14 adjoining the smaller end of the piston. Owing to the difference in areas of the two ends of the piston, the latter is pressed against the shoulder 18 (i.e., towards the left in FIG. 1) by the biassing hydraulic liquid pressure.
  • nonhydraulic means such as compression springs 25, can additionally be provided.
  • a cut-01f valve means comprising valve slide 22 is secured to and arranged to be positively driven by the shuttle piston 15 and to close the connection between the duct 13 and the check valve 17 as soon as the shuttle piston 15 has begun its movement to the right during pressing. In this manner the check valve 17 is not subjected to the pressing pressure obtaining in the space 10.
  • An apparatus for simultaneously pressing of a plurality of articles from a material such as ceramic material comprising a plurality of vertically movable upper plungers; a movable platen secured to all of said upper plungers to effect simultaneous vertical movement of said upper plungers; a stationary mould part having a plurality of mould cavities each respectively aligned and cooperating with one of said upper plungers; a plurality of lower rams respectively disposed in each of said mould cavities below the material being pressed, each of said lower rams being individually vertically movable between upper and lower positions, and being slidably received at its lower ,4 end within a respective fluid cylinder, all of said fluid cyinders beingv in fluid communication with each other; a shuttle cylinder having an enlargeddiameter first end connected to a source of fluid under pressure and a reduced-diameter second end; a shuttle piston slidably disposed in said shuttle cylinder between said first and second ends and having respective enlarged-diameter and reduced-di
  • each of said lower rams having an upper shoulder adapted to .abut against said abutment when said lower ram is in its uppermost position, the hydraulic liquid biasing each of said lower rams upwardly against said abutment.
  • An apparatus as defined in claim 2 further comprising a bypass duct communicating said duct means directly with the source of fluid under pressure around said shuttle cylinder, and flow limiting means disposed in said bypass duct to permit fluid flow from the source of fluid under pressure to said duct means while preventing fluid flow in the opposite direction, whereby any fluid lost from said fluid cylinders or said duct means will be automatically replaced from the source of fluid under pressure through said bypass duct.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Presses (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US819316A 1968-04-30 1969-04-25 Multiarticle press with hydraulically biassed lower rams Expired - Lifetime US3611517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1759429A DE1759429C3 (de) 1968-04-30 1968-04-30 Vorrichtung zum gleichzeitigen Pressen mehrerer plattenförmiger Presslinge

Publications (1)

Publication Number Publication Date
US3611517A true US3611517A (en) 1971-10-12

Family

ID=5695572

Family Applications (1)

Application Number Title Priority Date Filing Date
US819316A Expired - Lifetime US3611517A (en) 1968-04-30 1969-04-25 Multiarticle press with hydraulically biassed lower rams

Country Status (9)

Country Link
US (1) US3611517A (enrdf_load_stackoverflow)
BE (1) BE731916A (enrdf_load_stackoverflow)
CH (1) CH480150A (enrdf_load_stackoverflow)
DE (1) DE1759429C3 (enrdf_load_stackoverflow)
ES (1) ES366566A1 (enrdf_load_stackoverflow)
FR (1) FR2007265A1 (enrdf_load_stackoverflow)
GB (1) GB1191439A (enrdf_load_stackoverflow)
NL (1) NL6904996A (enrdf_load_stackoverflow)
SE (1) SE346492B (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5192489A (enrdf_load_stackoverflow) * 1975-02-13 1976-08-13
US4145174A (en) * 1978-02-15 1979-03-20 Leningradskoe Spelsialnoe Konstruktorskoe Bjuro Polimernogo Masinostroenia Rotary tabletting machine
US4255930A (en) * 1979-08-10 1981-03-17 Natalie Adam J Power device
US4505115A (en) * 1981-09-08 1985-03-19 Arbuckle Donald P Fluidic transformer apparatus with feedback
US4684432A (en) * 1983-08-01 1987-08-04 General Motors Corporation Rotary molding machine
US4781095A (en) * 1985-01-28 1988-11-01 Kabushiki Kaisha Yoshida Shokai Pusher
US4905588A (en) * 1986-04-14 1990-03-06 Ishikawajima-Harima Heavy Industries Co., Ltd. Multi-member super-high generating press with integral pulsator-type hydraulic fluid pressure circuits
EP1403017A3 (en) * 2002-09-29 2005-10-12 Fabio Casolari A die for forming ceramic tiles
US20050252603A1 (en) * 2002-01-22 2005-11-17 Rule David P Compression mould for making a membrane electrode assembly
EP1566231A3 (de) * 2004-02-20 2007-01-03 Fette GmbH Pulverpresse
US20080067320A1 (en) * 2004-07-29 2008-03-20 Norihiro Takayama Press Molder and Cushion Ring
JP2012071324A (ja) * 2010-09-28 2012-04-12 Hitachi Powdered Metals Co Ltd 粉末成形金型装置
ITMO20110174A1 (it) * 2011-07-18 2013-01-19 Gape Due S P A Stampo isostatico, particolarmente per piastrelle ceramiche
ES2421457A1 (es) * 2012-02-29 2013-09-02 Macer S L Dispositivo porta-punzones isostático para moldes para la fabricación de piezas cerámicas
CN106915105A (zh) * 2017-04-20 2017-07-04 上海华普钢结构股份有限公司 一种新型自制双缸折弯机

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272980A (en) * 1979-08-10 1981-06-16 Gulf & Western Manufacturing Company Load equalizer for press tooling
DE2935156A1 (de) * 1979-08-31 1981-03-19 Laeis-Werke Ag, 5500 Trier Pressform, insbesondere fuer keramische formteile
DE3215597A1 (de) * 1982-04-27 1983-10-27 MINDA Industrieanlagen GmbH, 4950 Minden Presse insbesondere zur herstellung von holzleimbindern
AT396905B (de) * 1990-03-02 1993-12-27 Leinweber Maschinen Gmbh Hydraulische presse zur herstellung von formkörpern aus schüttbarer masse
DE19737248A1 (de) * 1997-08-27 1999-03-18 Kobra Formen & Anlagenbau Gmbh Form zur Herstellung von Formkörpern
ES2181514B1 (es) * 1999-07-15 2004-06-01 Constantino Parra Rodriguez Dispositivo para regular la compactacion en punzones para prensas.
CN109176838A (zh) * 2018-09-27 2019-01-11 中车大连机车车辆有限公司 地砖模具及地砖制作方法

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5192489A (enrdf_load_stackoverflow) * 1975-02-13 1976-08-13
US4145174A (en) * 1978-02-15 1979-03-20 Leningradskoe Spelsialnoe Konstruktorskoe Bjuro Polimernogo Masinostroenia Rotary tabletting machine
US4255930A (en) * 1979-08-10 1981-03-17 Natalie Adam J Power device
US4505115A (en) * 1981-09-08 1985-03-19 Arbuckle Donald P Fluidic transformer apparatus with feedback
US4684432A (en) * 1983-08-01 1987-08-04 General Motors Corporation Rotary molding machine
US4781095A (en) * 1985-01-28 1988-11-01 Kabushiki Kaisha Yoshida Shokai Pusher
US4905588A (en) * 1986-04-14 1990-03-06 Ishikawajima-Harima Heavy Industries Co., Ltd. Multi-member super-high generating press with integral pulsator-type hydraulic fluid pressure circuits
US20050252603A1 (en) * 2002-01-22 2005-11-17 Rule David P Compression mould for making a membrane electrode assembly
US7431875B2 (en) * 2002-01-22 2008-10-07 E.I. Du Pont De Nemours And Company Process of preparing a unitized membrane electrode assembly using compression molding
EP1403017A3 (en) * 2002-09-29 2005-10-12 Fabio Casolari A die for forming ceramic tiles
EP1566231A3 (de) * 2004-02-20 2007-01-03 Fette GmbH Pulverpresse
US20080067320A1 (en) * 2004-07-29 2008-03-20 Norihiro Takayama Press Molder and Cushion Ring
US7540734B2 (en) * 2004-07-29 2009-06-02 Toyota Jidosha Kabushiki Kaisha Press molder and cushion ring
JP2012071324A (ja) * 2010-09-28 2012-04-12 Hitachi Powdered Metals Co Ltd 粉末成形金型装置
ITMO20110174A1 (it) * 2011-07-18 2013-01-19 Gape Due S P A Stampo isostatico, particolarmente per piastrelle ceramiche
EP2548707A1 (en) * 2011-07-18 2013-01-23 Gape Due S.P.A. Isostatic mold, particularly for ceramic tiles
ES2421457A1 (es) * 2012-02-29 2013-09-02 Macer S L Dispositivo porta-punzones isostático para moldes para la fabricación de piezas cerámicas
CN106915105A (zh) * 2017-04-20 2017-07-04 上海华普钢结构股份有限公司 一种新型自制双缸折弯机

Also Published As

Publication number Publication date
DE1759429B2 (de) 1973-06-07
SE346492B (enrdf_load_stackoverflow) 1972-07-10
GB1191439A (en) 1970-05-13
BE731916A (enrdf_load_stackoverflow) 1969-10-01
NL6904996A (enrdf_load_stackoverflow) 1969-11-03
CH480150A (de) 1969-10-31
FR2007265A1 (enrdf_load_stackoverflow) 1970-01-02
DE1759429C3 (de) 1973-12-20
DE1759429A1 (enrdf_load_stackoverflow) 1971-11-11
ES366566A1 (es) 1971-03-16

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