WO2003035980A1 - Procede et dispositif de fabrication de feuille formee - Google Patents

Procede et dispositif de fabrication de feuille formee Download PDF

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Publication number
WO2003035980A1
WO2003035980A1 PCT/JP2002/011064 JP0211064W WO03035980A1 WO 2003035980 A1 WO2003035980 A1 WO 2003035980A1 JP 0211064 W JP0211064 W JP 0211064W WO 03035980 A1 WO03035980 A1 WO 03035980A1
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WO
WIPO (PCT)
Prior art keywords
mold
papermaking
paper
molded article
drying
Prior art date
Application number
PCT/JP2002/011064
Other languages
English (en)
Japanese (ja)
Inventor
Kohro Utsui
Yorio Hashimoto
Original Assignee
Utsui Co., 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 Utsui Co., Ltd. filed Critical Utsui Co., Ltd.
Priority to JP2003538468A priority Critical patent/JP4099146B2/ja
Publication of WO2003035980A1 publication Critical patent/WO2003035980A1/fr

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Classifications

    • 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
    • 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
    • B30B15/062—Press plates
    • B30B15/064—Press plates with heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof

Definitions

  • the present invention relates to a method for producing a molded article and an apparatus for producing the same.
  • a raw material such as pulp is dispersed in water.
  • the pulp component in the dispersion is extracted using a papermaking net having a predetermined shape.
  • a method has been widely used in which a water-containing paper-formed molded product formed into a predetermined shape is heated and dried by passing it through a hot-air drying oven, and then dried to obtain a final product.
  • a hot-air drying oven is a large device with a very long length from the inlet to the outlet. Therefore, there was a disadvantage that the installation area of the device became large and the manufacturing cost also increased.
  • Japanese Patent Application Laid-Open No. 6-49800 discloses that a hydrated paper-formed article formed by papermaking on a lower mold using a pulp raw material liquid is pressed between the upper mold and dewatered, and then the hydrated paper-formed article is dried. Holding the upper mold and lowering the lower mold, moving the press lower mold waiting at another position to position the press lower mold below the upper mold holding the hydrated papermaking molded product, High frequency drying is performed by sandwiching the hydrated paper-formed product between the upper die and the lower press die, and the lower press die is moved while holding the hydrated paper-formed product in the lower press die.
  • a heated and heated press is performed by sandwiching a hydrated paper-formed product between the upper press die and the lower press die to obtain a paper-formed product as a final molded product.
  • Japanese Patent Application Laid-Open No. 6-650900 discloses a method for producing a molded article similar to that of the above-mentioned Japanese Patent Application Laid-Open No. 6-49800, and a plurality of paper molding machines are provided. It discloses a manufacturing method in which the phase of the production cycle of a molded article is shifted, and a high frequency is applied to each papermaking molding machine in accordance with the phase of the shifted production cycle.
  • Japanese Patent Application Laid-Open No. 6-1585999 when a wet-formed paper-formed product is dried and formed, a hot-water-formed paper-formed product is sandwiched between an upper press die and a lower press die and heated and pressed. Is disclosed.
  • JP-A-6-49800, JP-A-6-690000 and JP-A-6-158959 water is contained between the upper press die and the lower press die. Since the molded paper is sandwiched and pressed and heated and dried, it is possible to produce a molded molded article having a uniform thickness, excellent dimensional accuracy, and a smooth surface and good appearance. Also, there is no need to install large-scale equipment such as a hot-air drying furnace, and the manufacturing cost can be reduced.
  • the manufacturing methods disclosed in Japanese Patent Application Laid-Open Nos. Hei 6-49800 and Hei 6-690000 include a high-frequency drying step and a heating / pressing step that are linearly connected to each other.
  • the press lower die 66 fixed to the transfer table 61 is connected to the cylinder 68 to reciprocate horizontally on the rail 64 as shown in Fig. 11.
  • the first upper die 65 and the second upper die (heated press upper die) 6 are arranged to be separated from each other in the horizontal direction. It is configured so that the lower press die 66 can be arranged at the lower position of each of the 7.
  • Japanese Patent Application Laid-Open No. 2000-340700 discloses a method in which a hydrated paper-formed product formed on a surface of a papermaking die is transferred to a die supported by a swing arm, and the rotary die is used to move the die into a lower rotary table. Is placed above the lower mold supported by the mold, and the wet molded article is transferred from the mold to the lower mold, and the swing mold is separated from the mold by rotation of the swivel arm. The upper mold is lowered, and the hydrated paper-molded article is sandwiched between the upper mold and the lower mold. The upper and lower dies are moved in the rotating direction by the rotary table while holding the hydrated paper-molded article, It is disclosed that heating and drying of a hydrated paper-made molded product by a mold is performed.
  • Japanese Patent Application Laid-Open No. 2000-34070 discloses a method in which heating and drying using an upper and lower mold are performed while moving in the circumferential direction.
  • the hydrated paper-formed product is then transferred to the lower die from the dies, and the upper die is applied to the hydrated paper-formed product on the lower die, and the hydrated paper-formed product is placed between the upper die and the lower die.
  • It requires a complicated process of heating and drying with a water-made molded product in between, and therefore has the disadvantage that the standby time when moving from one process to the next is long, resulting in poor production efficiency.
  • a moving device is required for transferring the hydrated paper-formed article from the papermaking mold to the take-off die, and for transferring the product to the lower die from the take-off die, which makes the device complicated and large.
  • the present invention has been made to solve the above-mentioned conventional problems, and has a uniform thickness even in a complicated shape, does not generate distortion, and is capable of producing a molded article having excellent dimensional accuracy.
  • An object of the present invention is to provide a method for manufacturing a product.
  • Another object of the present invention is to provide a method for producing a molded article having a smooth surface and a good appearance.
  • a further object of the present invention is to provide a method for producing a molded article that can efficiently produce the molded article and improve the production efficiency.
  • Another object of the present invention is to provide an apparatus for manufacturing a molded article having a simple structure and realizing miniaturization. Disclosure of the invention
  • a papermaking mold is manufactured by immersing a papermaking mold in a pulp raw material liquid, removing pulp components to form a wet papermaking product on the papermaking mold, and forming a wet papermaking product between the papermaking mold and the upper mold.
  • the product is dehydrated and dried to produce a hydrated paper-formed product, and the obtained hydrated paper-formed product is transferred in the circumferential direction.
  • the hydrated papermaking molded article is transferred in the circumferential direction by causing the upper mold to hold the hydrated papermaking molded article by suction and moving the upper mold in the circumferential direction.
  • the hydrated paper-formed product is sandwiched between the upper mold and the lower mold and heated and dried.
  • the stage when the upper mold holding the hydrated papermaking molded article by suction reaches the upper position of the lower mold The lower mold is raised and the hydrated papermaking molded article is pressurized and heated between the lower mold and the upper mold.
  • the heating and drying of the paper molded article is preferably performed a plurality of times.
  • a plurality of lower dies are installed along the circumferential direction in which the upper die moves, and the hydrated paper-formed products are successively transferred between the upper die and the lower die while the hydrated paper-formed products are transferred by the upper dies. Heat and dry.
  • a sheet-shaped molded product is obtained by the heating and drying, and the sheet-shaped molded product is removed from the mold, thereby obtaining a final molded product.
  • the papermaking molded article manufacturing apparatus of the present invention includes a plurality of upper dies supported by a rotatably provided support and movably provided in a circumferential direction, and a process of moving the upper dies in a circumferential direction.
  • the apparatus of the present invention comprises a mechanism for dehydrating and drying a hydrated paper product formed on a papermaking mold between a papermaking mold and an upper mold, and holding the hydrated papermaking molded product obtained by the dehydration drying in the upper mold. It has a mechanism for sequentially transferring to the dry molding zone, and a mechanism for heating and drying the hydrated paper-made molded product between the upper mold and the lower mold in the dry molding zone.
  • the papermaking mold in dehydration and drying, is raised to sandwich a water-containing papermaking product with the upper mold and pressure dehydration is performed, and in heat drying, the lower mold is raised and the upper mold is raised. And pressurizing and heating the hydrated papermaking molded product.
  • a hydrated paper-formed product formed by removing a pulp component on a papermaking mold is dehydrated and dried between a papermaking mold and an upper mold, and then a hydrated paper-formed product obtained by the dehydration drying is obtained. Is transferred in the circumferential direction, and at a point in the circumferential direction, the water-containing paper-molded article is sandwiched between the upper and lower dies and heated and dried. The time required to move from the first drying step to the heating and drying step and the time required to move from one heating and drying step to the next heating and drying step can be reduced, and the production cycle can be shortened without wasting standby time.
  • the upper mold does not move up and down and always moves only in the circumferential direction, and the upper mold that receives the hydrated paper-formed article from the papermaking mold always thereafter performs the hydrated paper-formed article. Since each process is moved while the suction is maintained, the movement between the processes can be performed smoothly and quickly, and the production efficiency can be greatly improved as compared with the related art.
  • the upper mold when the hydrated paper-molded article is suction-held in the upper mold and sequentially transferred to each of the drying molding steps, the upper mold always holds the hydrated paper-molded article even during the transfer. Since suction drying and heat drying are performed, sufficient drying treatment can be performed until the molded product is taken out, and the drying treatment can be performed more efficiently.
  • the manufacturing apparatus of the present invention has a simple structure, and can be downsized to contribute to cost reduction.
  • FIG. 1 is a schematic plan view of the apparatus of the present invention
  • FIG. 2 is a schematic front view of the apparatus of the present invention viewed from the direction of the first dry forming zone B in FIG. 1
  • FIG. 3 is a view from the direction of the second dry forming zone C in FIG. 4a, 4b, 4c, 4 d and 4 e are schematic front views showing the paper making process
  • FIGS. 5 a, 5 b and 5 c are schematic front views showing the dry forming process in the first dry forming zone B
  • FIGS. 6 a, 6 b and 6 c are
  • FIG. 7 is a schematic front view showing a dry molding process in the second dry molding zone C
  • FIG. 7 is a schematic front view showing a molded product taking-out process
  • FIG. 8 is a schematic vertical cross-sectional view showing a state in which an upper mold and a papermaking mold are matched
  • FIG. 10 is a schematic perspective view showing an example of a sheet-formed product obtained by the manufacturing method of the present invention.
  • FIG. 11 is a front view showing a conventional manufacturing apparatus. It is a schematic diagram. BEST MODE FOR CARRYING OUT THE INVENTION
  • the manufacturing apparatus 1 of the present invention has a plurality of upper dies 4a, 4b, 4c, 4d supported and fixed on a rotatable support 3.
  • FIG. 1 shows a four-pole rotary type in which four upper dies are arranged on the support 3, the number of upper dies is not limited to four in the present invention.
  • An upper mold can be provided.
  • the number of lower molds can be arbitrarily determined accordingly.
  • the support 3 is supported by the rotation shaft 31 and is configured to rotate with the rotation shaft 31.
  • the support 3 has arms branched in four directions from the center, a base 45 is fixed to the end of each arm, and upper dies 4a, 4b, 4c, 4 are provided on the lower surface of each base 45. d is supported and fixed by fasteners such as screws. The upper dies 4a, 4b, 4c, and 4d are supported by the support 3 via the base 45 so as to be movable in the circumferential direction.
  • the configuration of the support 3 is not limited to the arm shape, and may be a disk-shaped rotary table.
  • Reference numeral 9 denotes a driving device for driving the rotating shaft 31 to rotate.
  • the driving device 9 is controlled by the control device 32.
  • the rotation axis by this control device 3 2 In addition to controlling the rotation speed of the rotation shaft 31, the rotation angle and the stop time in the intermittent rotation of the rotation shaft 31 can be controlled.
  • An index, a support motor, a positioning knock pin, and the like can be used as such a control device.
  • 10 is a support frame.
  • the papermaking zone A and a plurality of drying zones B, C, and D are provided in the process in which the upper dies 4 &, 4 13, 4 and 4 d move in the circumferential direction (FIG. 1).
  • a papermaking tank 7 in which the papermaking mold 2 is installed is disposed.
  • the first dry molding zone B, the second dry molding zone (:, and the third dry molding zone D have Types 5a, 5b and 5c are arranged.
  • Figs. 2 and 3 circles below the upper dies 4a, 4b, 4c, and 4d so that the papermaking dies 2, and the lower dies 5a, 5b, and 5c face the upper dies, respectively. They are arranged along the circumference.
  • the papermaking mold 2 located below the upper mold 4a is installed inside the papermaking tank 7.
  • a cylinder 33 is provided inside the papermaking tank 7, and a base 42 is attached to an upper end of a shaft body 13 movably provided by the cylinder 13 3, and a papermaking machine is provided on an upper surface of the base 42.
  • the mold 2 is supported and fixed by fixing devices such as screws.
  • the shaft 13 is moved up and down by the action of the cylinder 33, whereby the papermaking mold 2 is configured to be movable in the vertical direction.
  • a known pulp raw material liquid in which pulp raw material is dispersed in water is used. be able to.
  • a virgin raw material and a recycled paper raw material such as waste paper may be mixed, or a pulp raw material liquid may be prepared from only the recycled paper raw material.
  • a pulp raw material may be mixed with a water-soluble polymer, a thermoplastic synthetic resin or fiber which is melted by the heat of the heated press.
  • the lower die 5 a located below the upper die 4 b is supported and fixed on the upper surface of the base 50 by a fixing tool such as a screw, and the base 50 is a cylinder 3 mounted on the base 14. It is attached to the upper end of a shaft body 49 which can be moved up and down by 4.
  • the base 50 is attached to a shaft 49 of a cylinder 134 installed on the base 14.
  • the lower dies 5a, 5b, and 5c are configured to be able to move upward and downward by the action of the cylinder 134.
  • the lower dies 5a, 5b, 5c can be moved vertically by the cylinders 34, but are not moved in the circumferential direction and are fixed. It is preferable to use hydraulic cylinders as the cylinders 33, 34 in the papermaking mold 2 and the lower molds 5a, 5b, 5c.
  • a molded article receiving device 36 is provided near the installation location of the upper mold and the lower mold.
  • the apparatus 36 is provided with a receiving table 35 slidably provided in a horizontal direction.
  • the upper die holding the paper-formed product after the pressurizing and heating treatment is completed.
  • the receiving table 35 is moved downward, and the molded article discharged from the upper mold by blowing compressed air is received and moved backward, and when it returns to the original position or while moving backward.
  • the receiving table 35 has a mechanism for tilting and dropping the formed paper product downward.
  • a mechanism for inclining the receiving table 35 a known mechanism such as rotating the receiving table 35 using a cylinder can be employed.
  • a transfer device such as a belt conveyor is provided at the point where the molded product falls. Is provided.
  • a plurality of passages 6 are provided inside an upper mold 4a supported and fixed to a lower surface of a base 45.
  • Each of the plurality of passages 6 has an opening in the surface of the mold, and a core vent 25 formed with micropores at the opening end is embedded therein:
  • the core vent 25 has a micropore forming surface on one opening end side. It is a bottom cylindrical body, and a large number of fine holes are provided on the fine hole forming surface.
  • the core vent 25 is attached so that the micropore forming surface is located on the opening end side of the mold surface of the passage 6.
  • the fine holes provided in the core vent 25 may be circular or slit-shaped, and the diameter of the circular hole is preferably 0.5 to 2.0 Oim, and the slit width of the slit hole is 0. It is preferably 5 to 2.0 dragons. If the above hole diameter and slit width are less than 0.5 mm, clogging may occur and impede the moisture permeation of the hydrated molded article, and if it exceeds 2.0, the hydrated molded article may be damaged. Pulp components may permeate through the pores.
  • the plurality of passages 6 merge at the upper part of the mold, and the merge portion communicates with a communication passage 15 provided inside the base 45.
  • a vacuum passage 46 and a compressed air passage 47 are provided in communication with the communication passage 15. Both the vacuum passage 46 and the compressed air passage 47 are provided horizontally in the base 45, and the vacuum passage 46 is connected to a vacuum pump (not shown). Not connected to a compressor.
  • the vacuum pump 46 can reduce the pressure in the vacuum passage 46, the communication passage 15 and the passage 6, and the compressed air can be supplied to the compressed air passage 47 by the function of the compressor. It can be blown out of the mold surface through passage 15, passage 6 and core vent 25.
  • the vacuum passage 46 and the compressed air passage 47 may be configured as vertical passages communicating with the communication passage 15 in the base 45. Furthermore, this vertical passage is a vacuum passage 4 6 and a compressed air passage 47 may be formed, or the vacuum passage 46 and the compressed air passage 47 may be formed as one passage. In the latter case, the pressure can be reduced through a single passage or compressed air can be supplied. Inside the base 45, a predetermined number of sunflowers 22 are buried.
  • Each of the upper molds 4b, 4c, and 4d has the same structure as the above-described upper mold 4a.
  • the papermaking mold 2 comprises a mold body 19, a support member 21, and a papermaking net 17 attached to the surface of the mold body 19, and the mold body 19 is supported. It is supported by the member 21 and fixed to the base 42.
  • a mesh having a mesh that allows water in the pulp raw material liquid to pass but does not allow the pulp component to pass is used.
  • a 15 to 80 mesh wire mesh is used.
  • Stainless steel or brass is used as the material of the wire mesh.
  • a plurality of passages 18 are provided inside the papermaking mold 2, and each of the plurality of passages 18 is open to the surface of the mold, so that the open end of the passage 18 communicates with the micropores of the net 17.
  • the passage 18 is a passage through which the moisture of the water-containing molded article is permeable, and is composed of a plurality of vertical passages and horizontal passages, and the vertical passages and the horizontal passages communicate at the intersection.
  • the passage 18 has a pore diameter of 0.5 to 4.0.
  • the pore size is less than 0.5 thighs, clogging may occur, which may impede the transmission of water through the hydrated paper-formed product, and if the pore size exceeds 4.0, the pulp component of the hydrated paper-formed product may enter. There is a fear.
  • the plurality of passages 18 join at a lower portion of the mold, and the joining portion communicates with a communication passage 20 provided inside the base 42.
  • a vacuum passage 43 communicating with the communication passage 20 is provided horizontally, and the vacuum passage 43 is connected to a vacuum pump (not shown).
  • the vacuum passage 43 is a vertical passage communicating with the communication passage 20 in the base 42. You may comprise.
  • Fig. 8 shows a state in which the upper mold 4a and the papermaking mold 2 are matched, and reference numeral 11 denotes a clearance between the upper mold 4a and the papermaking mold 2. Therefore, when the upper mold 4a and the papermaking mold 2 are clamped, a water-containing molded article having a thickness corresponding to the clearance 11 is formed.
  • the lower mold 5a supported and fixed on the upper surface of the base 50 has a plurality of passages 54 inside.
  • the plurality of passages 54 are respectively opened on the surface of the mold, and a core vent 26 formed with a fine hole at the opening end is embedded.
  • the structure of the core vent 26 is the core vent 2 attached to the upper mold 4a described above. It has the same structure as 5.
  • each of the plurality of passages 54 communicates with a communication passage 23 formed inside the base 50, and the inside of the base 50 communicates with the communication passage 23 to form the vacuum passage 51 and the compressed air.
  • a passage 52 is provided. Both the vacuum passage 51 and the compressed air passage 52 are provided horizontally in the base 50, the vacuum passage 51 is connected to a vacuum pump not shown, and the compressed air passage 52 is connected to a compressor not shown. Are linked.
  • the inside of the vacuum passage 51, the communication passage 23 and the passage 54 can be reduced in pressure by the function of the vacuum pump, and compressed air is supplied to the compressed air passage 52 by the function of the compressor. It can be blown out from the mold surface through the communication passage 23, the passage 54, and the core vent 26.
  • the vacuum passage 51 and the compressed air passage 52 may be provided in the base 50 as a vertical passage communicating with the communication passage 23. Further, the vertical passage may be constituted by two passages divided into a vacuum passage 51 and a compressed air passage 52, or the vacuum passage 51 and the compressed air passage 52 may be constituted as one passage. In the latter case, the pressure can be reduced through a single passage or compressed air can be supplied. Be A predetermined number of heat sinks 24 are buried inside the grounds 50.
  • FIG. 9 shows a state where the upper mold 4a and the lower mold 5a are matched, and reference numeral 16 denotes a clearance between the upper mold 4a and the lower mold 5a. Therefore, when the upper mold 4a and the lower mold 5a are clamped, a water-containing paper molded article having a thickness corresponding to the clearance 16 is formed.
  • the material of the mold body 19, the upper molds 4a, 4b, 4c, 4d and the lower molds 5a, 5b, 5c in the papermaking mold 2 is generally a metal, but may be an elastic material.
  • the metal include aluminum and nickel
  • examples of the elastic material include rubber, an elastic synthetic resin, and a synthetic resin foam.
  • the upper molds 4a, 4b, 4c, 4d and the lower molds 5a, 5b, 5c each have a mold surface that reduces the frictional resistance between the mold surface and the molded product when removing the molded product. It is preferable to perform fluororesin processing in order to improve the mold release.
  • the above embodiment shows a case where the papermaking mold 2 is configured as a convex type, the upper dies 4a, 4b, 4c, and 4d are configured as a concave type, and the lower dies 5a, 5b, and 5c are configured as a convex type.
  • the papermaking mold 2 is concave, the upper molds 4a, 4b, 4c, and 4d are convex, and the lower molds 5a, 5b, and 5c are concave. Each may be configured as.
  • the method for producing a molded article of the present invention comprises a papermaking molding step, a drying molding step, and a molded article removal step.
  • Papermaking is performed by a papermaking mold 2 and an upper mold 4a arranged in a papermaking molding zone A.
  • the papermaking mold 2 in the papermaking tank 7 is located above the liquid level of the pulp raw material liquid 8.
  • the vacuum pump connected to the vacuum passage 43 is operated to put the inside of the papermaking mold 2 into a reduced pressure state. Position it above the liquid level in Figure 8 ( Figure 4c).
  • the pulp component is taken out on the net 17 of the papermaking mold 2 to form a hydrated paper 27 having a shape corresponding to the shape of the papermaking mold 2.
  • the papermaking mold 2 rises while vacuum-sucking the hydrated paper 27, the water in the hydrated paper 27 is sucked and dehydrated during the upward movement. That is, the water in the water-containing paper 27 is sucked into the mold through the net 17 and guided into the passage 18.
  • the water guided to the lower side of the mold through the passage 18 is guided to the vacuum passage 43 via the communication passage 20 and discharged to the outside of the mold through the discharge passage.
  • the papermaking mold 2 holding the hydrated paper 27 by suction is located at a position where the hydrated paper 27 contacts the upper mold 4a and presses the hydrated paper 27 with the upper mold 4a and the papermaking mold 2.
  • the clearance 11 between the upper mold 4a and the papermaking mold 2 becomes a constant value
  • the ascent movement of the papermaking mold 2 stops. That is, the value of the clearance 11 between the upper mold 4a and the papermaking mold 2 is set in advance as the operating condition of the cylinder 33, and based on this, the upward moving distance of the papermaking mold 2 is controlled by the controller. .
  • a control device a sensor, a spacer, or the like can be used.
  • the value of the clearance 11 is 10% to 40% of the thickness of the wet papermaking product 27 when pressed between the upper mold 4a and the papermaking mold 2 before being pressed. A numerical value that results in a thickness is preferred.
  • FIG. 4D shows a state in which the upward movement of the papermaking mold 2 is stopped at the above-described predetermined position, and a pressing force is applied to the upper mold 4a.
  • the hydrated paper product 27 is sandwiched between the upper mold 4a and the papermaking mold 2 and pressed, whereby the hydrated paper product 27 is pressed and formed into a shape according to the mold, and a hydrated papermaking molded product 12 is obtained.
  • suction dehydration and heating in the upper mold 4a are performed in addition to the suction dehydration by the papermaking mold 2 described above.
  • the water guided to the upper part of the mold through the passage 6 is guided to the vacuum passage 46 through the communication passage 15 and discharged to the outside of the mold through the discharge passage.
  • the upper mold 4a is heated by the heater 22.
  • the heating temperature of the upper mold 4a by the heater 22 is preferably 100 ° C to 250 ° C, and the degree of vacuum in the upper mold 4a and the papermaking mold 2 when performing suction dehydration is both 70 ° C. 0 to: LO mmHg is preferred.
  • the water content of the water-containing molded article 12 becomes about 30 to 70% by weight.
  • the papermaking mold 2 descends, separates from the upper mold 4a, and returns to the old position in the papermaking tank 7.
  • the water-containing paper-molded article 12 is in a state of being suction-held by the upper mold 4a (FIG. 4e).
  • the driving device 9 is operated to rotate the rotating shaft 31 and thereby the support 3 is rotated so that the rotation angle a becomes 90 °.
  • the upper die 4a moves in the circumferential direction, and is displaced to a position above the lower die 5a in the first dry forming zone B.
  • the upper mold 4b is simultaneously displaced to a position above the lower mold 5b in the second dry molding zone C
  • the upper mold 4c is displaced to a position above the lower mold 5c in the third dry molding zone D
  • the upper mold 4d is displaced to a position above the papermaking mold 2 in the papermaking molding zone A, and the processing in each zone is performed synchronously.
  • the upper mold 4a moved to the first dry molding zone B is performing the heating and drying process with the lower mold 5a
  • the formation of the above-described hydrated paper and the upper mold 4a are performed.
  • dehydration and drying treatment by papermaking mold 2 is performed.
  • the rotation angle a of each upper die is controlled by the control device 32, and the upper die is accurately positioned.
  • the cylinder 34 When the upper mold 4a is displaced to a position above the lower mold 5a in the first dry molding zone B, the cylinder 34 is actuated to raise the shaft body 49, thereby moving the lower mold 5a upward. (Fig. 5a) 0
  • the lower mold 5a contacts the hydrated papermaking molded article 12 held by the upper mold 4a and continues to rise until it is pressed, and the upper mold 4a and the lower mold 5a
  • the upward movement of the lower mold 5a stops. That is, the numerical value of the clearance 16 between the upper mold 4a and the lower mold 5a is preset as the operating condition of the cylinder 34, and based on this, the upward moving distance of the lower mold 5a is controlled by the control device. .
  • the clearance 16 between the upper mold 4a and the lower mold 5a is smaller than the clearance 11 between the upper mold 4a and the papermaking mold 2 in the papermaking zone A.
  • the value of the clearance 16 is preferably such that the thickness is 5% to 50% of the thickness of the hydrated paper-made article 27 in the state of being removed.
  • FIG. 5B shows a state in which the upward movement of the lower mold 5a stops at the above-described predetermined position, and a pressing force is applied to the upper mold 4a.
  • the hydrated paper-molded article 12 is sandwiched between the upper mold 4a and the lower mold 5a, pressed and heated and dried.
  • the upper mold 4a performs suction and heating while holding the hydrated papermaking molded product 12, but continues to perform suction and heating even after the matching with the lower mold 5a.
  • the suction and heating mechanism of the upper mold 4a is as described with reference to FIG.
  • the lower mold 5a starts suction and heating after this mold matching.
  • the suction mechanism and the heating mechanism in the lower mold 5a are shown in FIG. That is, a vacuum pump connected to the vacuum passage 51 of the lower mold 5a is operated to make the inside of the lower mold 5a in a reduced pressure state, and the water in the water-containing molded article 12 is suctioned and dehydrated. Hydrated The water in the molded article 12 is sucked into the mold through the core vent 26 and guided into the passage 54. The water guided to the lower side of the mold through the passage 54 is guided to the vacuum passage 51 through the communication passage 23, and is discharged to the outside of the mold through the discharge passage.
  • the lower mold 5a is heated by the heater 24, whereby the hydrated paper molded article 12 is heated and dried.
  • the water vapor generated by the heating passes through the core vent 26-the passage 54-the communication passage 23-the vacuum passage 51 and the discharge passage, and is discharged to the outside of the mold.
  • the heating temperature of the lower mold 5a by the heater 24 is preferably 100 ° C. to 250 ° C., and the degree of vacuum of the lower mold 5a is preferably 700 to 1 OmmHg.
  • the heating temperature of the upper mold 4a in this dry molding step is preferably from 100 ° C. to 250 ° C., and the degree of vacuum is preferably from 700 ° C. to 1 O mmHg.
  • the cylinder body 34 is operated and the shaft body 49 is slightly lowered while the hydrated papermaking molded product 12 is suction-held in the upper mold 4a. Then, the lower mold 5a is slightly moved downward, and the upper mold 4a and the lower mold 5a are separated from each other by a predetermined distance. Next, the compressor is operated to feed compressed air from the compressed air passage 47 of the upper mold 4a, and to blow air from the core vent 25 through the communication passage 15 and the passage 6. Since the upper mold 4a is heated by the heater 22, the air flowing in the passage 6 is also heated, and thus the heated air blows out from the upper mold 4a.
  • the hydrated paper molded article 12 can be efficiently heated and dried, and the release of the hydrated paper molded article '12 can be improved. That is, when the hydrated paper molded article 12 swings up and down, air heated from the upper mold 4a or the lower mold 5a is blown to the hydrated paper molded article 12 so that the hydrated paper molded article 12 is heated and dried. Is promoted. In addition, since the upper mold 4a and the lower mold 5a are separated from each other by a predetermined distance, the water vapor retained on the surface of the hydrated paper molded article 12 escapes from the space between the upper mold 4a and the lower mold 5a. This promotes the drying of the water-containing molded article 12.
  • the support 3 rotates, and the upper mold 4a is displaced to a position above the lower mold 5b in the second dry molding zone C while holding the wet papermaking molded article 12.
  • the upper mold 4b is simultaneously displaced to a position above the lower mold 5c in the third dry molding zone D
  • the upper mold 4c is displaced to a position above the papermaking mold 2 in the papermaking molding zone A
  • 4 d is the upper orientation of the lower mold 5 a 2 in the first dry molding zone B
  • the processing in each zone is performed synchronously.
  • the lower mold 5b When the upper mold 4a is displaced to a position above the lower mold 5b in the second dry molding zone C, the lower mold 5b is moved upward (FIG. 6a). When the clearance between the upper mold 4a and the lower mold 5 reaches a constant value, the upward movement of the lower mold 5b stops.
  • the clearance between the upper mold 4a and the lower mold 5b is preferably smaller than the clearance 16 between the upper mold 4a and the lower mold 5a, but may be equal.
  • the water-containing paper-molded product 12 is sandwiched between the upper mold 4a and the lower mold 5b, and is pressed and heated and dried. ( Figure 6b).
  • suction and heating are performed in the upper mold 4a and the lower mold 5b, respectively, but since the structure of the lower mold 5b is the same as that of the above-described lower mold 5a, the upper mold 4a and the lower mold 5a have the same structure.
  • the suction mechanism and the heating mechanism in the mold 5b are the same as the suction mechanism and the heating mechanism shown in FIG.
  • the upper mold 4a and the lower mold 5b are slightly separated from each other, and air blowing and vacuum suction are performed in the same manner as described above. Switch between the 4a and the lower mold 5b alternately, and swing the wet molded article 1 2 up and down.
  • the support 3 is rotated, and the upper mold 4a is displaced to a position above the lower mold 5c in the third dry molding zone D while holding the wet papermaking molded article 12.
  • the upper mold 4b is simultaneously moved to a position above the papermaking mold 2 in the papermaking molding zone A, and the upper mold 4c is moved to a position above the lower mold 5a in the first dry molding zone B.
  • the upper mold 4d is displaced to a position above the lower mold 5b in the second dry molding zone C, and the processing in each zone is performed synchronously.
  • the lower mold 5c When the upper mold 4a is displaced to a position above the lower mold 5c in the third dry molding zone D, the lower mold 5c is moved upward, and the clearance between the upper mold 4a and the lower mold 5c is increased. When the value becomes constant, the upward movement of the lower mold 5c is stopped.
  • the clearance between the upper mold 4a and the lower mold 5c is preferably smaller than the clearance between the upper mold 4a and the lower mold 5b, but may be equal.
  • the wet paper-formed molded article 12 is sandwiched between the upper mold 4a and the lower mold 5c, pressed and heated and dried.
  • suction and heating are performed by the same mechanism as described above (the mechanism shown in FIG. 9).
  • the remaining moisture is removed by dry molding using the upper mold 4a and the lower mold 5c, and a final molded article 28 is obtained.
  • the moisture content of the sheet-formed article 28 is 0 to 10% by weight.
  • the upper mold 4a and the lower mold 5c are slightly separated from each other, and air blowing and vacuum suction are performed on the upper mold 4a and the lower mold 5c.
  • the paper-formed article 28 is swung up and down alternately. Thereafter, the sheet molding 28 is sucked and held by the upper mold 4a, and the lower mold 5c is further moved downward to return to the old position.
  • the receiving table 35 of the molded article receiving device 36 moves forward and stops when it reaches the lower position of the upper die 4a.
  • compressed air is supplied from the compressed air passage 47 of the upper mold 4a, and air is blown from the surface of the upper mold 4a through the core vent 25.
  • the molded article 28 is released from the upper mold 4a and falls onto the lower receiving table 35 (FIG. 7).
  • the receiving table 35 moves rearward after receiving the molded article 28.
  • the receiving table 35 returns to the original position or while moving backward, the receiving table 35 is inclined to drop the paper-formed product 28 downward.
  • a transport device such as a belt conveyor is provided at a lower position where the molded article 28 falls, and receives the dropped molded article 28 and transports it to the next process.
  • the support 3 rotates and the upper mold 4a is displaced to a position above the papermaking mold 2 in the papermaking molding zone A, and thereafter, the same steps as described above are repeated.
  • the water discharged from (1) can be collected and reused as water for pulp raw material production, thereby saving water resources and preventing environmental pollution.
  • a container 29 as shown in FIG. 10 can be manufactured as a sheet-formed product, and a cushioning material for packaging can also be manufactured.

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

Abstract

L'invention concerne un procédé et un dispositif de fabrication de feuille formée utilisée comme contenants d'emballage et matériau de calage pour emballages, le dispositif comprenant plusieurs demi-moules de dessus (4a), (4b), (4c) et (4d) montés sur une plate-forme rotative (3), de façon à être déplacés selon une direction circonférentielle, un demi-moule de formation (2) et plusieurs demi-moules de dessous (5a), (5b) et (5c) disposés sous les demi-moules de dessus (4a) à (4d) selon la direction circonférentielle. Le procédé consiste à déshydrater et sécher une feuille humide sur le demi-moule de formation (2) et le demi-moule de dessus (4a), par succion de la feuille humide formée dans le demi-moule (4a) et à passer la feuille formée, dans la direction circonférentielle, et à presser et à chauffer cette feuille formée humide (12) entre le demi-moule de dessus (4a) et les demi-moules de dessous (5a), (5b) et (5c), dans l'ordre.
PCT/JP2002/011064 2001-10-24 2002-10-24 Procede et dispositif de fabrication de feuille formee WO2003035980A1 (fr)

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JP2003538468A JP4099146B2 (ja) 2001-10-24 2002-10-24 抄造成形品の製造方法及びその製造装置

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JP2001-326621 2001-10-24
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WO2003035980A1 true WO2003035980A1 (fr) 2003-05-01

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PCT/JP2002/011064 WO2003035980A1 (fr) 2001-10-24 2002-10-24 Procede et dispositif de fabrication de feuille formee
PCT/JP2002/011065 WO2003035981A1 (fr) 2001-10-24 2002-10-24 Procede de production d'articles moules traites selon un procede de fabrication du papier et dispositif de presse chauffante

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PCT/JP2002/011065 WO2003035981A1 (fr) 2001-10-24 2002-10-24 Procede de production d'articles moules traites selon un procede de fabrication du papier et dispositif de presse chauffante

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SE529164C2 (sv) 2004-11-26 2007-05-22 Pakit Int Trading Co Inc Massaform och användning av massaform
JP4681958B2 (ja) * 2005-06-17 2011-05-11 株式会社アステム プレス機
SE529627C2 (sv) 2006-01-18 2007-10-09 Pakit Int Trading Co Inc Formningsverktyg för tillverkning av fiberföremål
CN101914858B (zh) * 2010-08-03 2012-04-25 杭州欧亚机械制造有限公司 一种模塑成型机模具滴水现象消除方法及模塑成型机
AU2017327693B2 (en) * 2016-09-14 2022-03-03 PackBenefit S.L. Improved pulp disposable tray
KR102183584B1 (ko) * 2019-02-13 2020-11-26 (주)그린 엔바이론텍 펄프 몰드 성형품의 제조방법
DE102019127562A1 (de) * 2019-10-14 2021-04-15 Kiefel Gmbh Faserformanlage zur herstellung von formteilen aus umweltverträglich abbaubarem fasermaterial
DE102022108094A1 (de) * 2022-04-05 2023-10-05 Kiefel Gmbh Heisspress-werkzeughälfte, heisspresseinrichtung mit einem heisspresswerkzeug und verfahren zum heisspressen von vorformlingen aus einem faserhaltigen material

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JPWO2003035981A1 (ja) 2005-02-10
WO2003035981A1 (fr) 2003-05-01
JP4099147B2 (ja) 2008-06-11
JP4099146B2 (ja) 2008-06-11

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