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EP0121484A1 - Säulenpresse mit Ausgleich für Längenänderungen der Säulen beim Pressen - Google Patents

Säulenpresse mit Ausgleich für Längenänderungen der Säulen beim Pressen Download PDF

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Publication number
EP0121484A1
EP0121484A1 EP84420038A EP84420038A EP0121484A1 EP 0121484 A1 EP0121484 A1 EP 0121484A1 EP 84420038 A EP84420038 A EP 84420038A EP 84420038 A EP84420038 A EP 84420038A EP 0121484 A1 EP0121484 A1 EP 0121484A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
cylinder
press
auxiliary
column
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.)
Ceased
Application number
EP84420038A
Other languages
English (en)
French (fr)
Inventor
Pierre Poncet
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.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9286626&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0121484(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of EP0121484A1 publication Critical patent/EP0121484A1/de
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B21B31/04—Rolling stand frames or housings; Roll mountings ; Roll chocks with tie rods in frameless stands, e.g. prestressed tie rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
    • B30B15/245—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam using auxiliary cylinder and piston means as actuating members

Definitions

  • the present invention relates to presses in general, and more particularly to those for molding plastics by compression or injection.
  • presses in principle comprise two plates, one of which is fixed and the other movable to ensure the clamping of the two halves of the mold. It is essential that during this tightening the two plates remain perfectly parallel to each other.
  • the columns which connect the fixed plate to the support devices of the movable plate elastically elongate under the effect of the forces involved and as the fact that in general the molding imprint is not symmetrical, these forces are different for the various columns, the parallelism ensured at rest tends to disappear. It is therefore necessary to equip the presses with columns of exaggerated section so that their elongation remains negligible. This solution is costly and imperfect, especially for high-powered machines with large dimensions.
  • this cylinder is slaved to the hydraulic clamping pressure so as to impose on the sleeve a compression pre-stress equal to, or at least approximately equal to, the tensile force applied to the core of the column, so as to eliminate, or at least reduce to a large extent, the deformations of the sleeve during tightening of the press.
  • each auxiliary cylinder has the same section as the corresponding clamping cylinder and is supplied in parallel with it. The solution is then perfect.
  • the press an angle of which is very diagrammatically shown in FIG. 1, comprises a base 1 on which are mounted columns, generally four in number, each comprising a core 2, slidably surrounded by a sleeve 3 from which it protrudes in the upward direction to receive a fixed upper plate 4.
  • On this plate 4 carries the piston 5 of an annular auxiliary cylinder with a very short stroke, the cylinder 6 of which abuts against a retaining nut 7 screwed onto the core 2.
  • On the lower part of the sleeve 3 can slide a movable lower plate 8 actuated by a also annular clamping cylinder, comprising a piston 9 which bears against the plate 8 and a cylinder integral with said sleeve.
  • the two cylinders 5-6 and 9-10 have the same section and are connected in parallel.
  • the two halves 11 and 12 of the mold are clamped between the two plates 4 and 8.
  • the four clamping cylinders, here referenced 13-14 are not co-axial with columns 2-3. It follows that the irregularities of the forces developed by these jacks at points A, B, C, D of the plan view of FIG. 3 determine torques which are not perfectly balanced by those resulting from the forces which the auxiliary cylinders exert in E, F, G and H. But if the imprint of the mold is not too asymmetrical and if the distances AE, BF , CG and DH are not too large, the compensation of the forces is ensured to a sufficient extent so that the longitudinal deformations (contraction or extension) of the sleeves 3 remain negligible.
  • Fig. 4 indicates another kind of solution applicable in all cases and which does not require the use of auxiliary cylinders with multiple elements.
  • the outer body 16 of a hydraulic distributor has been fixed to it by a lateral arm 15.
  • Fig. 5 and 6 correspond to the case of a press with a profile in the form of an elongated rectangle in which the four clamping cylinders 13-14 are arranged in the longitudinal alignment of the four columns 2-3. It is easy to demonstrate algebraically that here the forces that each auxiliary cylinder must develop are a function of only two factors, namely the forces exerted by the two clamping cylinders 13-14 located on the same longitudinal line. It is therefore possible to establish each of these auxiliary cylinders in the form of two tandem elements 5a-6a, 5b-6b of appropriate sections, connected in parallel one to the tightening cylinder (13-14) closest to the longitudinal direction, the other to the cylinder furthest in the same direction.
  • 5a-6a, 5b-6b of appropriate sections
  • the press can include any suitable device for approach cylinders.
  • the movable plate 8 which was supposed to be the lower one, could on the contrary be the upper plate, in which case the part referenced 4 in the appended drawings would be a fixed support plate for a mobile plate which would be connected to it by the jacks of tightening such as 13-14.
  • the detector and corrector system 16-17 of fig. 4 could include a multiplier mechanism levers or the like to increase sensitivity. Columns 2-3 could be horizontal.
  • the invention is applicable not only to presses intended for molding, but also to all the others posing similar problems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Control Of Presses (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Press Drives And Press Lines (AREA)
  • Lift Valve (AREA)
EP84420038A 1983-03-04 1984-03-05 Säulenpresse mit Ausgleich für Längenänderungen der Säulen beim Pressen Ceased EP0121484A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8303803A FR2541934B1 (fr) 1983-03-04 1983-03-04 Dispositif de reglage du parallelisme et de la planeite des plateaux dans les presses a mouler
FR8303803 1983-03-04

Publications (1)

Publication Number Publication Date
EP0121484A1 true EP0121484A1 (de) 1984-10-10

Family

ID=9286626

Family Applications (2)

Application Number Title Priority Date Filing Date
EP84420037A Expired EP0122205B1 (de) 1983-03-04 1984-03-05 Präzisions-Hydrauliksteuerung, insbesondere für Formpressen
EP84420038A Ceased EP0121484A1 (de) 1983-03-04 1984-03-05 Säulenpresse mit Ausgleich für Längenänderungen der Säulen beim Pressen

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP84420037A Expired EP0122205B1 (de) 1983-03-04 1984-03-05 Präzisions-Hydrauliksteuerung, insbesondere für Formpressen

Country Status (4)

Country Link
EP (2) EP0122205B1 (de)
AT (1) ATE24028T1 (de)
DE (1) DE3461553D1 (de)
FR (1) FR2541934B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003095187A1 (en) * 2001-10-18 2003-11-20 Hartwick Professionals, Inc. Compression molding using a self-aligning and activating mold system
CN105327974A (zh) * 2015-12-01 2016-02-17 盐城工学院 冲压模模次计数和平行度检测装置及其平行度检测方法
CN106427039A (zh) * 2016-11-30 2017-02-22 无锡市创恒机械有限公司 工件均匀加压装置
CN115206036A (zh) * 2022-09-13 2022-10-18 江苏振华新云电子有限公司 一种模压机工作时检测框条整平报警装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1703297A1 (de) * 1968-04-29 1972-02-17 Freudenberg Carl Fa Heizplattenpresse mit selbstkompensierenden Zylinderkolbenanordnungen
DE2245049A1 (de) * 1972-09-14 1974-03-21 Siempelkamp Gmbh & Co Hydraulische presse
DE2431585A1 (de) * 1974-07-01 1976-01-22 4 P Verpackungen Gmbh Ausgleichsvorrichtung fuer laengenaenderungen bei arbeitsmaschinen mit zuganker
FR2345247A1 (fr) * 1976-03-24 1977-10-21 Pahnke Engineering Presse de forge libre

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1007627B (de) * 1953-11-30 1957-05-02 Merklinger Maschinenfabrik G M Steuerventil mit Kolbenschieber fuer hydraulische Pressen
FR1122619A (fr) * 1955-02-25 1956-09-11 Servo-moteur à accumulation
US3064426A (en) * 1959-06-22 1962-11-20 Dba Sa Hydraulic systems
FR2204490B1 (de) * 1972-10-27 1976-10-29 Poncet Pierre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1703297A1 (de) * 1968-04-29 1972-02-17 Freudenberg Carl Fa Heizplattenpresse mit selbstkompensierenden Zylinderkolbenanordnungen
DE2245049A1 (de) * 1972-09-14 1974-03-21 Siempelkamp Gmbh & Co Hydraulische presse
DE2431585A1 (de) * 1974-07-01 1976-01-22 4 P Verpackungen Gmbh Ausgleichsvorrichtung fuer laengenaenderungen bei arbeitsmaschinen mit zuganker
FR2345247A1 (fr) * 1976-03-24 1977-10-21 Pahnke Engineering Presse de forge libre

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003095187A1 (en) * 2001-10-18 2003-11-20 Hartwick Professionals, Inc. Compression molding using a self-aligning and activating mold system
CN105327974A (zh) * 2015-12-01 2016-02-17 盐城工学院 冲压模模次计数和平行度检测装置及其平行度检测方法
CN105327974B (zh) * 2015-12-01 2019-03-15 盐城工学院 冲压模模次计数和平行度检测装置及其平行度检测方法
CN106427039A (zh) * 2016-11-30 2017-02-22 无锡市创恒机械有限公司 工件均匀加压装置
CN115206036A (zh) * 2022-09-13 2022-10-18 江苏振华新云电子有限公司 一种模压机工作时检测框条整平报警装置
CN115206036B (zh) * 2022-09-13 2022-12-06 江苏振华新云电子有限公司 一种模压机工作时检测框条整平报警装置

Also Published As

Publication number Publication date
EP0122205A1 (de) 1984-10-17
DE3461553D1 (en) 1987-01-15
FR2541934B1 (fr) 1986-10-17
EP0122205B1 (de) 1986-12-03
FR2541934A1 (fr) 1984-09-07
ATE24028T1 (de) 1986-12-15

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19850409

17Q First examination report despatched

Effective date: 19860319

R17C First examination report despatched (corrected)

Effective date: 19860801

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Effective date: 19870919