WO2016209157A1 - Pulp molding apparatus and molds for use therein - Google Patents
Pulp molding apparatus and molds for use therein Download PDFInfo
- Publication number
- WO2016209157A1 WO2016209157A1 PCT/SE2016/050626 SE2016050626W WO2016209157A1 WO 2016209157 A1 WO2016209157 A1 WO 2016209157A1 SE 2016050626 W SE2016050626 W SE 2016050626W WO 2016209157 A1 WO2016209157 A1 WO 2016209157A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mold
- pair
- mold half
- mold halves
- pulp
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/40—Plastics, e.g. foam or rubber
- B29C33/405—Elastomers, e.g. rubber
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/307—Mould plates mounted on frames; Mounting the mould plates; Frame constructions therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/565—Consisting of shell-like structures supported by backing material
-
- 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
- D21J7/00—Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
- B29C2043/3652—Elastic moulds or mould parts, e.g. cores or inserts
Definitions
- embodiments herein relate to molding of large pulp objects, the molds used therein and the apparatus for producing large objects of molded pulp using such molds.
- different embodiments of the application relate inter alia to different mold linings and in one non-limiting embodiment to the pulp molding of large objects such as coffins.
- Pulp molding is known in the art for producing small packages such as egg cartons, disposable food dishes, box inserts and other protective packaging materials etc.
- US 6 245 199 describes a method of pulp molding trays where the starting material is a suspension containing cellulose fibers.
- the male mold half is dipped in a bath of the suspension, and the mold halves are then pressed together under heat and pressure.
- SE 529 897 C2 describes the pulp molding of a tray where a dewatering receptacle is used to shape a tray of pulp which is then transferred to a compression tool where the tray is subjected to pressure and heat. It involves a transfer step and is not readily usable for large containers.
- Various embodiments of the disclosure comprises a pair of mold halves 3, 5 suitable for pulp molding by compression and heating, comprising a first half 5 for application of a pulp slurry and a second conforming mold half 3, wherein the surface of said first half mold 5 is covered with an elastomeric material.
- said first half 5 is a male mold half and said second mold half 3 is a female mold half conforming to said male form half.
- a pair of mold halves wherein the mold halves 3,5 are metal mold halves and/or the bodies of the mold halves 3,5 are made of metal.
- a pair of mold halves wherein said mold halves being metal mold halves 3, 5 suitable for pulp molding by compression and heating, comprising a first half [5] for application of a pulp slurry and a second conforming mold half 3, wherein the metal surface of said first half mold 5 is spray coated or cast with an elastomeric material.
- Embodiments of the disclosure further comprises an apparatus for use together with a pair of mold halves as defined in embodiments of the disclosure, comprising, a frame 1 in which a first of said mold halves 5 is mounted in means for translational movement towards a second mold half 3, means for compressing and holding said pair 3,5 of mold halves fitted against each other and a bath 10 of pulp slurry, characterized in that said means 4 for translational movement are adapted for immersing a first mold half in said bath 16 of pulp slurry and moving said first mold half into fitting compression against said second mold half.
- Figs. i(a)-i(f) shows an exemplary frame for use with a pair of mold halves according to embodiments herein, in various positions of the male mold half and in various sections to more clearly show how the
- Fig. 2 shows in perspective the pair of mold halves engaged in an exemplary embodiment of embodiments herein.
- Fig. 3(a) shows a cross sectional view through the male mold half shown in Fig. 2.
- Fig. 3(b) shows the same male mold half in perspective view.
- Figs. 4(a)-(e) show the male mold half in various views without its covering wire mesh.
- the apparatus according to embodiments herein as shown in one embodiment comprises a frame 1, holding a stationary platform 2 on which is mounted a female mold half 3 and below it a movable platform 12 holding a male mold half 5.
- Figs. i(a), i(b) and i(f) show the apparatus in its mold-separated position and Figs. i(c), i(d) and i(e) shown the apparatus its mold-compressed positon for forming the molded pulp shell.
- the same reference numerals for the same components are used throughout all of the drawings.
- the apparatus of this embodiment is shown in Fig. i(a) in perspective view in the mold-separated position with the male mold half 5 submerged in a slurry bath 16. The liquid slurry itself is not shown in the figure. This same mold-separated position is shown in vertical section in Fig. i(b).
- the male mold half 5 is submerged in a pulp slurry bath 16 (99.5 % water and 0.5% pulp fibers at 25-30 degrees C) and a suction system 17 is connected to the hollow interior cavity 15 of the male mold, whereby a coating of pulp slurry is sucked onto the surface of the male mold half 5.
- a pulp slurry bath 16 (99.5 % water and 0.5% pulp fibers at 25-30 degrees C)
- a suction system 17 is connected to the hollow interior cavity 15 of the male mold, whereby a coating of pulp slurry is sucked onto the surface of the male mold half 5.
- Fig. 2 shows only the two mold halves in engagement with each other.
- one or both of the mold halves or the bodies of the mold halves maybe made of metal.
- the female mold half 3 of massive aluminum is shown in longitudinal section, while only half of the length of the male mold half 5 is shown.
- the elastomer 6 covering the entire surface of the male mold half 5 is shown in longitudinal section only to reveal the structure of the male mold half 5 which is covered with troughs 14 for optimal even distribution of the vacuum suction while it drains the pulp of water.
- the detailed enlargement E2 shows more clearly these vacuum distribution troughs 14 and the holes 8 in the bottoms thereof leading to the vacuum cavity 15 within the male mold half 5.
- Fig. 3(a) shows the male mold half 5 in cross section and the Fig. 3(b) shows it in perspective view.
- the male mold half 5 is shown complete, i.e. covered with the elastomer layer 6 and the wire mesh 7.
- the surface of said first half mold [5] may in embodiments be covered by being spray coated or cast with an elastomeric material.
- Embodiments of the male mold half 5 is made of hollow aluminum and is coated with an elastomer 6 which is ca 30 mm thick. According to a preferred embodiment this elastomer is sprayed onto the aluminum male mold half 5. It is also possible to cast the elastomer onto the aluminum mold half. A typical elastomer should be hydrophobic but not be subject to hydrolysis. An advantageous hardness, particularly for a sprayed on elastomer is 70 A-Shore, to provide optimal elastic properties. 5 mm diameter through-holes spaced 15 mm from each other cover the elastomer layer and connect to through-holes 8 in the aluminum body 9 of the male mold half 5. Within the male mold half there is generated a vacuum of 0.8-0.9 bar. On top of the elastomer layer there is a wire mesh 7. In this case it is a 100 mesh (i.e. 100 threads per inch) and is
- the wire mesh can also be laid in multiple layers which will further contribute to distributing the vacuum forces more evenly.
- the female mold-half 3 is made of aluminum and has in this example a weight of 700 kg. It is heated to ca. 200 degrees C, for example by means of heating rods inserted in holes 13 in the material of the female mold- half 3. This is the most energy effective method of heating the female mold-half. Its inner surface 3a will create the outer surface of the product.
- the two mold halves 3 and 5 can be made of porous aluminum to increase strength over using sintered material and to increase heat conductivity.
- Figs. 4(a)-(e) show the male mold half 5 in side elevation, top view, longitudinal section (with enlarged detail), end elevation and perspective (with enlarged detail) respectively.
- the male mold half 5 is shown without its covering wire mesh but with its elastomer layer.
- the entire elastomer surface is covered with small dewatering through holes 10 all over the surface.
- each of these holes 10 leads to a through 14 in the aluminum body of the male mold half 5, and from there via the holes 8 to the inner vacuum cavity 15 in the male mold half 5.
- the holes 8 are of larger diameter than the more numerous holes 10 in the elastomer layer 6 thus improving the vacuum effect dewatering the pulp.
- the male mold half is in embodiments provided with troughs 14 in the body of the male mold half under the elastomer material 6.
- the troughs 14 are
- the male mold-half 5 after being dipped in the slurry bath 16 dewaters the slurry through vacuum to approximately 20% dryness (80% water) and the male mold-half 5 is then pressed into the female mold-half 3 down to a gap of ca. 1 mm between the two mold halves. It can vary for this particular product between ca. 0.8 and ca. 1.2 mm without
- the aluminum male mold-half 5 (initially ca. 25°C) expands over its length approximately 7-8 mm with corresponding expansions in its width (2.5 mm) and height (1.5 mm). This is
- the temperature of the hot female mold-half 3 will in turn drop ca. 13 degrees C during the
- the temperature of the female mold-half must be rather precise, i.e. in this example between ca. 195° and 204° C. This precision is difficult to achieve and maintain in an industrial process of this type.
- These problems have been experienced even in the manufacture of relatively small pulp molded products, and require precise adjustment of the temperature to avoid them.
- Most pulp molded products, such as egg cartons, are several millimeters thick and are thus more porous and it makes no difference whether such products have a rough surface. A product with a rough surface cannot be used in many applications. For a large product, the problems of dimensional heat expansion/contraction will be greatly increased. These problems have hitherto made it
- Embodiments herein was developed in order to produce shells for caskets with very few rejects and no necessity of precisely monitoring and continually adjusting the temperatures of the two mold-halves. Since the elastomer is used to absorb much of the dimensional variation of the male and female mold-halves, they can be made much lighter and thinner than otherwise since they will not require a large mass to prevent temperature variations. For instance in this example the female mold- half weighs ca. 750 kg. If it had to maintain a more constant temperature it might have to have a mass of several tons, requiring more energy to heat such a large mass and maintain the heat.
- a casket has in general curved sides, something which is expensive to produce in plywood or with wood planks. According to embodiments herein it is possible to produce shells of ca. 1-2 mm in thickness, which provides the maximum stiffness. Thicknesses greater or less than this thickness (1-2 mm) provide less stiffness. It is also possible to fit multiple finished shells inside one another to provide multi-ply strength.
- the elastomer is sprayed onto the surface of the male mold half, but a more complicated casting process is also possible whereby the elastomer is cast onto the male mold half 5.
- the stationary mold half in this case the female mold half 3
- mount the stationary mold half to be slightly horizontally moveable (+- 25 mm) to make sure that any heating expansion will not prevent a correct
- a second mold half is mounted for slight horizontal movement of at most 25 mm, to achieve correct alignment during fitting compression of a first mold half 5 in the second mold half 3.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16814817.9A EP3313637B1 (en) | 2015-06-23 | 2016-06-23 | Pulp molding apparatus and molds for use therein |
CA2989777A CA2989777A1 (en) | 2015-06-23 | 2016-06-23 | Pulp molding apparatus and molds for use therein |
RU2017144082A RU2712662C2 (en) | 2015-06-23 | 2016-06-23 | Device for moulding cellulose pulp and moulds used in this device |
JP2017564738A JP6828980B2 (en) | 2015-06-23 | 2016-06-23 | Pulp molding equipment and molds for use in it |
DK16814817.9T DK3313637T3 (en) | 2015-06-23 | 2016-06-23 | Pulp forming apparatus and molds for use therein |
ES16814817T ES2774689T3 (en) | 2015-06-23 | 2016-06-23 | Pulp molding apparatus and molds for use therein |
CN201680036650.9A CN107921671B (en) | 2015-06-23 | 2016-06-23 | Pulp moulding equipment and mould used in pulp moulding equipment |
US15/738,733 US10711404B2 (en) | 2015-06-23 | 2016-06-23 | Pulp molding apparatus and molds for use therein |
AU2016281465A AU2016281465B2 (en) | 2015-06-23 | 2016-06-23 | Pulp molding apparatus and molds for use therein |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1550864A SE539866C2 (en) | 2015-06-23 | 2015-06-23 | Pulp Molding Apparatus and Molds for Use Therein |
SE1550864-1 | 2015-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016209157A1 true WO2016209157A1 (en) | 2016-12-29 |
Family
ID=57605301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2016/050626 WO2016209157A1 (en) | 2015-06-23 | 2016-06-23 | Pulp molding apparatus and molds for use therein |
Country Status (11)
Country | Link |
---|---|
US (1) | US10711404B2 (en) |
EP (1) | EP3313637B1 (en) |
JP (1) | JP6828980B2 (en) |
CN (1) | CN107921671B (en) |
AU (1) | AU2016281465B2 (en) |
CA (1) | CA2989777A1 (en) |
DK (1) | DK3313637T3 (en) |
ES (1) | ES2774689T3 (en) |
RU (1) | RU2712662C2 (en) |
SE (1) | SE539866C2 (en) |
WO (1) | WO2016209157A1 (en) |
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WO2022155074A1 (en) * | 2021-01-12 | 2022-07-21 | Becklin Holdings, Inc. | Compression molding utilizing an elastomeric compression tool |
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DK3237680T3 (en) * | 2014-12-22 | 2020-03-09 | Celwise Ab | PROCEDURE FOR THE PROMOTION OF A PRODUCT FROM A FIBER SLUSHING AND EQUIPMENT OR TOOL FOR USE IN SUCH A PROCEDURE |
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SE539867C2 (en) | 2015-06-23 | 2017-12-27 | Organoclick Ab | Large Lightweight Coffin and Method for its Manufacture |
US11647463B2 (en) * | 2017-09-13 | 2023-05-09 | Intel Corporation | Methods and arrangements to enable wake-up receiver for modes of operation |
CN108252164B (en) * | 2018-03-16 | 2023-08-15 | 常州市诚鑫环保科技有限公司 | Automatic forming machine for double-time down-suction slurry of molded product and manufacturing method |
TWI677612B (en) * | 2018-12-27 | 2019-11-21 | 興中環保科技股份有限公司 | Paper-plastic mold platform with horizontal adjustment structure |
DE102019127562A1 (en) * | 2019-10-14 | 2021-04-15 | Kiefel Gmbh | FIBER MOLDING LINE FOR THE PRODUCTION OF MOLDED PARTS FROM ENVIRONMENTALLY COMPATIBLE DEGRADABLE FIBER MATERIAL |
US11421388B1 (en) * | 2019-11-01 | 2022-08-23 | Henry Molded Products, Inc. | Single-walled disposable cooler made of fiber-based material and method of making a single-walled disposable cooler made of fiber-based material |
WO2022066152A1 (en) * | 2020-09-22 | 2022-03-31 | Hewlett-Packard Development Company, L.P. | Pulping machine quick-change forming and transfer assembly |
SE2230069A1 (en) * | 2022-03-11 | 2023-09-12 | Stora Enso Oyj | A tool for molding a fiber-based product |
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2015
- 2015-06-23 SE SE1550864A patent/SE539866C2/en unknown
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2016
- 2016-06-23 AU AU2016281465A patent/AU2016281465B2/en active Active
- 2016-06-23 EP EP16814817.9A patent/EP3313637B1/en active Active
- 2016-06-23 ES ES16814817T patent/ES2774689T3/en active Active
- 2016-06-23 DK DK16814817.9T patent/DK3313637T3/en active
- 2016-06-23 WO PCT/SE2016/050626 patent/WO2016209157A1/en active Application Filing
- 2016-06-23 CN CN201680036650.9A patent/CN107921671B/en not_active Expired - Fee Related
- 2016-06-23 CA CA2989777A patent/CA2989777A1/en not_active Abandoned
- 2016-06-23 US US15/738,733 patent/US10711404B2/en active Active
- 2016-06-23 RU RU2017144082A patent/RU2712662C2/en active
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Also Published As
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CN107921671A (en) | 2018-04-17 |
RU2017144082A (en) | 2019-07-23 |
DK3313637T3 (en) | 2020-02-24 |
RU2017144082A3 (en) | 2019-08-21 |
US20180187379A1 (en) | 2018-07-05 |
US10711404B2 (en) | 2020-07-14 |
JP6828980B2 (en) | 2021-02-10 |
SE539866C2 (en) | 2017-12-27 |
CA2989777A1 (en) | 2016-12-29 |
SE1550864A1 (en) | 2016-12-24 |
AU2016281465A1 (en) | 2018-02-01 |
CN107921671B (en) | 2021-06-08 |
JP2018518605A (en) | 2018-07-12 |
ES2774689T3 (en) | 2020-07-22 |
AU2016281465B2 (en) | 2021-09-30 |
EP3313637A4 (en) | 2019-04-03 |
EP3313637B1 (en) | 2019-11-20 |
EP3313637A1 (en) | 2018-05-02 |
RU2712662C2 (en) | 2020-01-30 |
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