WO1999022069A1 - Procede et appareil de formage d'articles a partir de pate a papier - Google Patents

Procede et appareil de formage d'articles a partir de pate a papier Download PDF

Info

Publication number
WO1999022069A1
WO1999022069A1 PCT/GB1998/003200 GB9803200W WO9922069A1 WO 1999022069 A1 WO1999022069 A1 WO 1999022069A1 GB 9803200 W GB9803200 W GB 9803200W WO 9922069 A1 WO9922069 A1 WO 9922069A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
die
press
press station
article
Prior art date
Application number
PCT/GB1998/003200
Other languages
English (en)
Inventor
Jonathan Herbert Bradford
Original Assignee
Px Technologies Ltd.
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 Px Technologies Ltd. filed Critical Px Technologies Ltd.
Priority to AU96354/98A priority Critical patent/AU9635498A/en
Priority to EP98950195A priority patent/EP0951604A1/fr
Priority to CA002276106A priority patent/CA2276106A1/fr
Publication of WO1999022069A1 publication Critical patent/WO1999022069A1/fr
Priority to US09/340,922 priority patent/US6210531B1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
    • D21J3/10—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of hollow bodies
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • D21J1/04—Pressing

Definitions

  • This invention relates to forming machines more particularly for producing components from a paper pulp or slurry.
  • Egg separators and egg boxes are typical examples of components of this kind, although the same forming process or a similar one is, or may be, used to form containers and
  • a known forming machine for making such components requires a relatively massive surrounding frame to withstand the pressures applied during a press operation at a press station of the machine. The force required to press
  • the paper pulp or slurry into the required shape at the press station may be in
  • the press station is normally pre-set to press the article being formed under a particular pressure to a particular thickness.
  • the machine has been preset to operate at a particular pressure to press a particular article to a certain thickness, there is little control to vary the applied pressure and/or thickness of the article
  • the temperature required for drying the pressed article is higher than need be the case and/or the drying time may be longer than need be the case.
  • known press stations may not be able to produce the required shape of an article accurately enough (e.g. a 1° or 2° angle on a product 100 millimetres deep).
  • the actual finish on every surface of the article may not be suitably consistent (e.g. the
  • inside surface of an egg box formed from paper pulp is usually irregular and
  • An object of the invention is to at least alleviate one of the
  • a forming machine for forming articles from pulp or slurry, comprising a press station having upper and lower perforate dies mounted, in use, for relative reciprocatory movement towards and away from one another and each said die being housed, in use, in an associated one of a two part chamber, said chamber parts being arranged to seal together when moved towards one another, and means for evacuating the sealed chamber whereby a final part of relative movement of the dies towards one another is caused by the evacuation.
  • the press station including a chamber housing, in use, die means for forming an article and means to evacuate the chamber in order to press the article in the die
  • the cost of the framework could be reduced by, for example,
  • the saving in weight may be greater than 70% and preferably is greater than 40% or 50%.
  • the die means may comprise an upper perforate die or die set co-operable with a lower perforate die or die set in order to press form an article from paper pulp when said dies/die sets are brought together.
  • the dies/die sets will usually be relatively reciprocable towards and away from one another. It is possible that only the upper die/die set is movable.
  • the chamber evacuation means preferably comprises a vacuum pump and the degree of vacuum control applied is preferably variable, for example, by means of a vacuum valve (variable orifice valve). Additionally or alternatively, a vent valve may be provided to ambient (atmospheric) conditions surrounding the chamber.
  • the chamber is, preferably, in two main parts or halves that can seal together in use and, preferably, one or each main part/half has a slidably
  • skirts preferably a flanged skirt
  • seal co-operable with the opposing skirt to form a sealing
  • Stops may be
  • one chamber part/half may be slightly larger than the other and be slidably and sealably engageable with the other.
  • at least one of said main parts or halves of the chamber is float mounted on a member for moving said chamber part/half towards and away from the opposing chamber part/half.
  • the forming machine may include a forming station associated with or serving a plurality of press stations.
  • an article e.g. an eggbox
  • a paper or fibre slurry said article being smooth
  • a press station for a forming machine for forming articles from a paper or fibre slurry comprising one or more of the following features:
  • a press die mounted on a floating head; c) two chamber parts or halves, one or each having a slidably
  • evacuation means as in a), said means being variable to vary the degree of vacuum in the chamber; e) means for pressing an article with smooth surfaces in a controlled way.
  • FIGURE 1 shows a known forming machine
  • FIGURE 2 shows a sectional view of a first embodiment of a press
  • FIGURE 3 shows substantially the same view as FIGURE 2 with the dies closed together
  • FIGURE 4 shows an enlarged elevational view of two chamber parts of the press
  • FIGURE 5 shows a view of a further embodiment of a press station.
  • FIGURE 1 shows schematically a prior art forming machine supported by a relatively massive frame and aspects of the machine salient to the invention are now discussed.
  • the known forming machine comprises a relatively
  • the forming machine has a first station generally indicated by the reference (Forming), a second station (Press) and a third station (Conveyor) which is the loading end of a conveyor indicated by the reference numeral 16.
  • a tank 20 contains paper slurry.
  • a first platen 22 carries a moulding tool 24 which may be a male die and this is arranged with a motorised drive 18 for lowering the whole platen and tool into the tank
  • the drive 18 may be a hydraulic or pneumatic ram, or an electric motor, for example driving a rack and pinion or a toothed belt drive system for lowering the platen 22 and tool 24 into the tank 20 and subsequent raising out of the tank.
  • the platen 22 is associated with vacuum means (for removal of steam or water vapour or the like and/or for adhering pulp to the platen by
  • a second platen 26 and tool 28 In vertical alignment with the platen 22 and tool 24 is a second platen 26 and tool 28 which may be a female die. It will be appreciated that the dies 24, 28 are matched, usually so as to produce a component (moulding) of substantially constant thickness at all points between the dies. Platen 26 and tool 28 are mounted on a lifting and lowering mechanism here illustrated as hydraulic ram 30. The hydraulic ram 30 could be replaced by pneumatic means.
  • the platens 22, 26 may carry a plurality of tool sets for use in manufacturing a plurality of
  • the upper platen 26 and tool 28 complete with the fragile moulding are then transferred on to the press station and the moulding is lowered into contact with the die or tool 32 (generally similar to tool 24) carried on the lower platen 34 in the press station.
  • the fragile moulding is then transferred from the upper tool 28 to the lower tool 32 e.g. by positive pressure applied to the upper die and negative pressure applied to the lower die and the tool 28 is then returned to the forming station to repeat the cycle for the next fragile moulding (not shown).
  • the tools 36,32 may be closed together more closely than tools 24,28 so as to squeeze the
  • Each of the tool systems 32,36 on the respective platens 34, 38 may be associated with corresponding vacuum systems and additionally both are provided with heating means (usually electrical); as is the platen 26, which
  • the pressure to be exerted at the forming station on the paper slurry in forming the article is not high in relation to the 20 tons pressure required at the press station and thus the massive framework 10,12,14 is not necessitated by the forming station.
  • the invention is concerned with a modification to the press station of the aforedescribed known type of forming machine, which modification may alleviate the need for the hydraulic ram of the press station or at least the high specification of same and/or alleviate the need for a relatively massive framework 10,12.
  • a press station has a chamber comprising a lower part or half 50 and an
  • the chamber 50,52 is provided as part of the press
  • Each half 50, 52 may be, for example, substantially rectangular with a peripheral wall 54,56 and the upper half may be dimensioned so as to be a free sliding fit in the lower half when the two move together more particularly as shown in our prior patent specification No.9722547.8 forming the priority document for this application and as shown in FIGURE 5.
  • the word "half" is used in a merely indicative sense; the two halves could be of widely different volume, although in the embodiment shown in FIGURES 2, 3 and 4 the two "halves" are very similar in shape and size. As shown in patent specification
  • sealing may be effected by an O-ring or the like 58 extending around the periphery of the external face of the smaller of the two halves 50, 52 so as to seal on the inner face of the skirt of the larger of the halves.
  • a highly resilient face seal could be used between the two halves.
  • chamber halves 50, 52 which includes a spring loaded sliding flanged skirt 51, 52 being provided on the external wall 54, 56 of each chamber half respectively.
  • a sliding seal E is provided on each chamber half 50, 52 which allows vertical reciprocation of the skirt 51, 52 relative to the external wall 54, 56 within fixed limits.
  • a stop T is provided in the form of a projecting annular edge on each external wall 54, 56 to limit the retraction movement of each skirt 51 , 52
  • FIGURE 2 If desired, in an alternative embodiment only one skirt (e.g. upper skirt 51) is slidable, the other skirt (e.g. 52) being fixed.
  • Each of the chamber halves 50, 52 in FIGURE 2 carries a platen and dies which are generally the same as those shown in the press station in FIGURE 1 and thus bear the same reference numbers 32, 34, 36, 38.
  • FIGURE 1 instead of mounting the upper platen 38 on the ram of a hydraulic cylinder for pressurisation, which is the arrangement in FIGURE 1 , in FIGURE
  • the upper platen 38 is carried on stand-off pins 60. It will be appreciated that the perforate dies 32, 36 communicate with passages which in this case may extend through the platen 34, 38 to the interior of the half chamber 50, 52 as well as being ducted away by a secondary vacuum system
  • the secondary vacuum system V,, V 2 is for transfer of the moulded article and steam extraction which is the case in the arrangement shown in
  • FIGURE 1 A first figure.
  • the upper chamber 52 half is shown float mounted on a member 64 extending vertically, which member may be reciprocated by an electric motor, for example, so as to carry it between a remote position and a position in which the chamber halves 50, 52 are engaged sufficiently for the sliding skirts S 1? S 2 to engage with the seal mounted in the upper annular edge of skirt S 2 engaging the lower annular edge of skirt S,.
  • a member 64 extending vertically, which member may be reciprocated by an electric motor, for example, so as to carry it between a remote position and a position in which the chamber halves 50, 52 are engaged sufficiently for the sliding skirts S 1? S 2 to engage with the seal mounted in the upper annular edge of skirt S 2 engaging the lower annular edge of skirt S,.
  • a vacuum pump is connected through manifold 68 and main vacuum valve 70 (see FIGURE 4) to the interior of the chamber so that once the seal is engaged, the chamber 50, 52 can be evacuated. Evacuation of the chamber 50, 52 not only draws water
  • the dies 32, 36 about the moulding finally, preferably, to a point at which peripheral abutment faces on the dies come into contact so as to prevent further movement.
  • One or other or both of the platens 34,38 will be heated in a similar fashion as in the FIGURE 1 arrangement.
  • a single forming station generally as shown in FIGURE 1 may be associated with a plurality of press stations as shown in FIGURE 2 and FIGURE 3.
  • the significance of this further feature is that the required water extraction and drying operation requires a substantially longer time than the forming operation carried out in the first stage as in the FIGURE 1 apparatus, and for increased speed of production the press operation can be carried out in two or more stages. Hence, each horizontal reciprocation in the direction of the arrow A will be carried out in two or more stages.
  • mouldings increases as the compression and drying continue from stage to stage but the pressures applied, particularly when a positive air pressure is provided to blow a moulding off one die on to another, must be controlled
  • the atmospheric pressure which is possible upon a relatively large area chamber when the vacuum is applied may be excessive and could possibly lead to an undesirably high pressure being applied to the mouldings unless limited by abutments on the dies. Therefore, according to a feature of the invention, means is provided for limiting the degree of vacuum in the sealed chamber or chambers (where more than one press station is provided) and possibly for continuously admitting
  • ambient air under volume/pressure control (and this may sweep the chamber/s to evacuate all steam and water when both air is applied and vacuum applied at one and the same time). This feature may accelerate the operation in each
  • FIGURE 4 showing an enlarged view of the chamber 50, 52 shown in
  • FIGURE 2 includes a variable orifice vacuum control valve 100 extending from the upper half 52 to limit the degree of vacuum in the sealed chamber.
  • an atmospheric vent valve 101 is shown in order to continuously admit ambient air when required.
  • a further very important feature of the invention is the provision of the guided, resilient floating mounting F of the head or unit H in carrying the upper platen 38, die 36 and chamber half 52.
  • machine could be replaced by "apparatus” or "article” could be replaced by

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne un poste de presse pour une machine de formage permettant de former des articles de papier et comprenant un compartiment constitué de deux parties (50, 52). On peut par ailleurs fixer ensemble ces deux parties et évacuer l'air du compartiment par un collecteur à vide (68), de manière à amener la matrice supérieure (36) montée sur plateau (38) en contact de pressage avec un moulage fragile placé sur la matrice inférieure (32) également montée sur plateau, et former ainsi l'article désiré.
PCT/GB1998/003200 1997-10-25 1998-10-26 Procede et appareil de formage d'articles a partir de pate a papier WO1999022069A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU96354/98A AU9635498A (en) 1997-10-25 1998-10-26 Method and device for forming articles from pulp slurry
EP98950195A EP0951604A1 (fr) 1997-10-25 1998-10-26 Procede et appareil de formage d'articles a partir de pate a papier
CA002276106A CA2276106A1 (fr) 1997-10-25 1998-10-26 Procede et appareil de formage d'articles a partir de pate a papier
US09/340,922 US6210531B1 (en) 1998-10-26 1999-06-25 Forming machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9722547.8A GB9722547D0 (en) 1997-10-25 1997-10-25 Improvements relating to forming machines
GB9722547.8 1997-10-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/340,922 Continuation US6210531B1 (en) 1998-10-26 1999-06-25 Forming machines

Publications (1)

Publication Number Publication Date
WO1999022069A1 true WO1999022069A1 (fr) 1999-05-06

Family

ID=10821082

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/003200 WO1999022069A1 (fr) 1997-10-25 1998-10-26 Procede et appareil de formage d'articles a partir de pate a papier

Country Status (5)

Country Link
EP (1) EP0951604A1 (fr)
AU (1) AU9635498A (fr)
CA (1) CA2276106A1 (fr)
GB (1) GB9722547D0 (fr)
WO (1) WO1999022069A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1061175A2 (fr) * 1999-06-15 2000-12-20 Fisher & Paykel Limited Améliorations dans ou relatives aux machines pour le formage de pâte à papier
ES2161613A1 (es) * 1999-07-08 2001-12-01 Suarez Vicente Balaguer Procedimiento, composicion y equipo para la fabricacion de piezas moldeadas de papel o carton reciclado.
WO2016209157A1 (fr) * 2015-06-23 2016-12-29 Organoclick Ab Appareil de moulage de pâte et moules à utiliser associés
CN108978358A (zh) * 2018-09-04 2018-12-11 永发（江苏）模塑包装科技有限公司 一种纸浆模塑移印装置
WO2020227404A1 (fr) * 2019-05-06 2020-11-12 Zume, Inc. Lignes de production de pièces moulées en fibres à haut rendement et à temps de cycle réduit
US10974490B2 (en) 2015-06-23 2021-04-13 Organoclick Ab Large lightweight coffin and method for its manufacture
US11738485B2 (en) 2019-11-11 2023-08-29 Zume, Inc. Molded fiber product production line

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105722A1 (fr) * 1982-09-30 1984-04-18 Armstrong World Industries, Inc. Compositions de pâtes formables
EP0406783A2 (fr) * 1989-07-07 1991-01-09 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé de fabrication d'objets creux à partir de fibres lignocellulosiques
EP0466653A1 (fr) * 1990-07-11 1992-01-15 Alois Koch Procédé de fabrication de cerceuil en matériau de pulpe formé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105722A1 (fr) * 1982-09-30 1984-04-18 Armstrong World Industries, Inc. Compositions de pâtes formables
EP0406783A2 (fr) * 1989-07-07 1991-01-09 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé de fabrication d'objets creux à partir de fibres lignocellulosiques
EP0466653A1 (fr) * 1990-07-11 1992-01-15 Alois Koch Procédé de fabrication de cerceuil en matériau de pulpe formé

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1061175A2 (fr) * 1999-06-15 2000-12-20 Fisher & Paykel Limited Améliorations dans ou relatives aux machines pour le formage de pâte à papier
EP1061175A3 (fr) * 1999-06-15 2001-02-07 Fisher & Paykel Limited Améliorations dans ou relatives aux machines pour le formage de pâte à papier
US6409885B1 (en) 1999-06-15 2002-06-25 Fisher & Paykel Limited Pulp forming machines
ES2161613A1 (es) * 1999-07-08 2001-12-01 Suarez Vicente Balaguer Procedimiento, composicion y equipo para la fabricacion de piezas moldeadas de papel o carton reciclado.
WO2016209157A1 (fr) * 2015-06-23 2016-12-29 Organoclick Ab Appareil de moulage de pâte et moules à utiliser associés
US10711404B2 (en) 2015-06-23 2020-07-14 Organoclick Ab Pulp molding apparatus and molds for use therein
US10974490B2 (en) 2015-06-23 2021-04-13 Organoclick Ab Large lightweight coffin and method for its manufacture
CN108978358A (zh) * 2018-09-04 2018-12-11 永发（江苏）模塑包装科技有限公司 一种纸浆模塑移印装置
CN108978358B (zh) * 2018-09-04 2023-10-10 永发（江苏）模塑包装科技有限公司 一种纸浆模塑装置
WO2020227404A1 (fr) * 2019-05-06 2020-11-12 Zume, Inc. Lignes de production de pièces moulées en fibres à haut rendement et à temps de cycle réduit
US11738485B2 (en) 2019-11-11 2023-08-29 Zume, Inc. Molded fiber product production line

Also Published As

Publication number Publication date
GB9722547D0 (en) 1997-12-24
CA2276106A1 (fr) 1999-05-06
AU9635498A (en) 1999-05-17
EP0951604A1 (fr) 1999-10-27

Similar Documents

Publication Publication Date Title
US6210531B1 (en) Forming machines
US4755128A (en) Apparatus for releasing a press-formed article from a die set
US3471601A (en) Process for the manufacture of articles from plastics material or having at least one plastic state
EP0681877B1 (fr) Procédé pour la fabrication de moules
CN111687998A (zh) 一种环保砖连续成型装置
WO1999022069A1 (fr) Procede et appareil de formage d'articles a partir de pate a papier
US3244779A (en) Selective heating and drawing of plastics
CN217822657U (zh) 一种高精密半导体元件封装热压机
GB2330552A (en) Press station
JP6767733B2 (ja) 熱成形モールド装置並びにその製造及び使用方法
CN216506706U (zh) 一种塑料制品成型模具
JP2001303498A (ja) パルプ成型離型機
EP1136212B1 (fr) Dispositif perfectionné pour la fabrication d'articles en céramique, comme par exemple des dalles, des carreaux et des articles similaires par pressage de poudre
CN212471887U (zh) 一种环保砖连续成型装置
US2912718A (en) Machine for shaping thermoplastic sheets
CN210916808U (zh) 一种用于瓶状制品纸浆模塑的模具和设备
JP3119828B2 (ja) 熱可塑性樹脂シ−トの熱成形方法及びその装置
CN108407328B (zh) 一种复合材料制品的热压成型方法
CN2243976Y (zh) 双面液压成型机
CN215434658U (zh) 一种真空热压成型装置
CN213440920U (zh) 一种注塑模具用密封排气装置
CN117445136B (zh) 一种陶瓷产品的成型用高压注浆机及其注浆工艺
CN104652178A (zh) 大型厚体纸浆模压工艺及设备
CN1304136C (zh) 封头成型设备
US4162883A (en) Apparatus for thermoforming hollow article having a high L/D ratio

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

ENP Entry into the national phase

Ref country code: CA

Ref document number: 2276106

Kind code of ref document: A

Format of ref document f/p: F

ENP Entry into the national phase

Ref document number: 2276106

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 09340922

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 1998950195

Country of ref document: EP

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWP Wipo information: published in national office

Ref document number: 1998950195

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWW Wipo information: withdrawn in national office

Ref document number: 1998950195

Country of ref document: EP