WO2001072488A1 - Buse pour machine de moulage par extrusion, et machine et procede de moulage par extrusion - Google Patents

Buse pour machine de moulage par extrusion, et machine et procede de moulage par extrusion Download PDF

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Publication number
WO2001072488A1
WO2001072488A1 PCT/JP2001/002458 JP0102458W WO0172488A1 WO 2001072488 A1 WO2001072488 A1 WO 2001072488A1 JP 0102458 W JP0102458 W JP 0102458W WO 0172488 A1 WO0172488 A1 WO 0172488A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
raw material
blade
extruder
extrusion molding
Prior art date
Application number
PCT/JP2001/002458
Other languages
English (en)
Japanese (ja)
Inventor
Isamu Kawakami
Original Assignee
Isamu Kawakami
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 Isamu Kawakami filed Critical Isamu Kawakami
Priority to AU2001242802A priority Critical patent/AU2001242802A1/en
Publication of WO2001072488A1 publication Critical patent/WO2001072488A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/24—Extrusion presses; Dies therefor using screws or worms
    • B30B11/245—Extrusion presses; Dies therefor using screws or worms using two or more screws working in different chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/26—Extrusion dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/26—Extrusion dies
    • B28B3/2609—Containing rotating elements perpendicular to the axis of extrusion

Definitions

  • the present invention relates to an extrusion molding machine nozzle, an extrusion molding machine, and an extrusion molding method, and particularly to a nozzle for an extrusion molding machine suitable for producing clay molded articles such as tiles, tiles, wall materials, and bricks for pottery.
  • the present invention relates to an extruder and an extrusion method.
  • clay moldings such as tiles and tiles have been manufactured from clay using an extruder.
  • this extruder generally, a raw material mainly composed of clay containing an appropriate amount of water is supplied from a hopper, and is conveyed while being kneaded by a screw conveyor in an extrusion chamber. It is configured to be extruded.
  • Fig. 9 shows the configuration of a conventional extruder.
  • This extruder has a hopper 1, a kneading chamber 11, an extrusion chamber 21, and a vacuum pump 51.
  • a kneading chamber 11 a kneading chamber 11
  • a vacuum pump 51 a vacuum pump 51
  • the kneading chamber 11 has a supply port 12 and a communication port 13.
  • a hopper 11 is attached to the supply port 12 so that raw materials can be supplied into the kneading chamber 11 via the hopper 1. Further, the communication port 13 is connected to an extrusion chamber 21 described later.
  • a kneading screw conveyor 14 extending from the supply port 12 to the communication port 13 is arranged inside the kneading chamber 11.
  • the kneading screw conveyor 14 is provided with a spiral screw blade 15 on the outer peripheral surface thereof, and is rotated by an electric motor 16 connected thereto, and feeds the material in the kneading chamber 11 in the direction of arrow A. Transport.
  • the extrusion chamber 21 has an inlet 22 and a discharge port 29.
  • the inlet 22 is composed of a number of holes having a size through which raw materials can pass, and is connected to the connection port 13 of the kneading chamber 11.
  • This extruded screw conveyor 24 has a spiral screw blade 25 on the outer peripheral surface thereof. It rotates by evening 26, and conveys the material in the extrusion chamber 21 in the direction of arrow B.
  • the vacuum pump 51 is connected to the extrusion chamber 21 via a suction pipe 52.
  • the raw material supplied to the hopper 1 is continuously supplied into the kneading chamber 11, and is extruded while being kneaded and compressed by the operation of the kneading screw conveyor 14. It is transported to the room 21.
  • the raw material supplied to the extrusion chamber 21 is pressure-fed toward the discharge port 29 by the operation of the extrusion screw conveyer 24 while the air bubbles present inside are removed by decompression by the vacuum pump 51, and discharged. It is pushed out from exit 29.
  • the strip-shaped extruded body thus obtained is appropriately cut into a predetermined length, subjected to a press process, and then subjected to a drying step and a baking step to be commercialized.
  • the conventional extruder described above has the following problems. That is, in the clay molded body extruded from the extruder, a rotation habit such as a twist due to the rotating action of the extrusion screw conveyer 24 remains, and the properties are non-uniform. As a result, distortion or cracking of the molded product occurs during drying or firing, and there has been a problem of deterioration in quality and yield.
  • the present invention has been made in order to solve such a problem, and it is intended to improve the quality and yield of molded articles by suppressing rotation habits such as torsion generated during extrusion molding of a raw material.
  • An object of the present invention is to provide a nozzle for an extruder, an extruder and an extruding method which can be achieved.
  • An object of the present invention is to provide an extruder having a discharge port through which a molded product is extruded, which is attached to the outlet of an extruder capable of extruding a raw material mainly composed of clay from an outlet by an extruder screw conveyor.
  • a nozzle for an extruder which is a nozzle and includes a rotating blade for stirring the raw material conveyed in the nozzle by rotation.
  • the rotation habit such as the twist of the raw material due to the rotation action of the extrusion screw conveyor is removed by stirring by the rotating blade, so that the properties of the molded body are made substantially uniform. be able to.
  • the rotation habit such as the twist of the raw material due to the rotation action of the extrusion screw conveyor is removed by stirring by the rotating blade, so that the properties of the molded body are made substantially uniform. be able to.
  • the rotating blade preferably includes a rotatable shaft and a main blade provided on the shaft, and more preferably includes a sub-blade provided on the main blade.
  • the main blade and the sub-blade are preferably flat, the main blade extends substantially perpendicularly to the axial direction of the shaft, and the sub-blade is a surface of the main blade. It preferably extends substantially perpendicularly from the back surface.
  • a baffle plate for blocking a flow of the raw material in the nozzle caused by the rotation of the rotary blade in a direction opposite to a discharge direction from the discharge port.
  • the object of the present invention is mainly based on an extrusion chamber provided with an inlet, a nozzle forming an outlet of the extrusion chamber, and clay supplied from the inlet extending from the inlet toward the outlet.
  • An extrusion screw conveyor capable of extruding the raw material to be extruded from the discharge port, and the nozzle is provided with a rotary blade that stirs the conveyed raw material by rotation.
  • the rotating shafts are arranged substantially parallel to each other, and the adjacent rotating blades are driven to rotate in opposite directions to each other, so that the rotating blades are provided between the rotating blades.
  • the raw material is passed through the first passage. As a result, substantially the same force can be applied to the raw material passing between the rotating blades from both sides, so that the rotation blade can be prevented from generating a new rotation habit.
  • the extruder preferably includes a vacuum pump connected to the nozzle.
  • the nozzle is stirred while the raw material is stirred by the rotating blade. Since the inside is decompressed, bubbles contained in the raw material can be easily removed, and distortion and cracks of the molded product can be more reliably prevented.
  • the object of the present invention is to extrude a molded product from a nozzle discharge port after extruding a raw material mainly composed of clay from an outlet by an extrusion screw conveyor, stirring the raw material by rotating a rotating blade.
  • This is achieved by an extrusion molding method characterized by the following.
  • FIG. 1 is a side sectional view of an extruder according to an embodiment of the present invention.
  • FIG. 2 is an enlarged side sectional view showing a nozzle of the extruder shown in FIG.
  • FIG. 3 is a view of the rotary blade shown in FIG. 1 as viewed in a feed direction of the raw material.
  • FIG. 4 is a perspective view of the rotary blade.
  • FIG. 5 is a front view of the nozzle.
  • FIG. 6 is a view showing a modification of the rotary blade.
  • FIG. 7 is a view showing a modified example of the nozzle.
  • FIG. 8 is a front view of an essential part of the nozzle shown in FIG.
  • FIG. 9 is a side sectional view of a conventional extruder.
  • FIG. 1 is a side sectional view of an extruder according to an embodiment of the present invention.
  • This extruder has a configuration in which a new nozzle is attached to the conventional extruder shown in FIG. Therefore, the same components as those of the conventional extruder are denoted by the same reference numerals, and the detailed description is omitted.
  • the extrusion chamber 21 has an outlet 23 through which the raw material is extruded by the operation of the extrusion screw conveyer 24.
  • the outlet 23 has a nozzle 42 of the present invention. Is attached via a flange portion.
  • a plurality of rotatable blades 30 rotatably supported are provided inside the nozzle 42.
  • the rotating blade 30 is configured such that a main blade 33 is attached to a shaft 32, and an auxiliary blade 34 is attached to a main blade 33. .
  • the shaft 32 is in the axial direction of the extruding screw conveyer 24 (the direction of arrow B in Fig. 1). It is arranged to extend horizontally along a plane substantially perpendicular to the plane, and is rotated by a connected electric motor (not shown). It is preferable that the rotation directions of the shafts 32 in the respective rotating blades 30 are opposite to each other so that the raw material passes between the two vertically adjacent rotating blades 30 (the C direction and the C direction in FIG. 2). D direction).
  • the rotation speed of the shaft 32 is preferably set to be substantially the same, for example, 1 to 50 rpm, and more preferably 1 to 20 rpm.
  • the main blade 33 is a plate-shaped member that is tapered while being curved toward the tip, and is provided in a plurality along a plane perpendicular to the shaft 32.
  • the sub-blade 34 is a plate-shaped member, and a plurality of sub-blades are provided so as to extend substantially perpendicularly from the front and back surfaces of the main blade 33.
  • the two adjacent rotating blades 30 are arranged so that the main blades 33 and the sub-blades 34 do not interfere with each other when they rotate, and partially overlap in a side view.
  • a nozzle 41 is provided at the tapered tip of the nozzle 42, and from a discharge port 41 a formed in the nozzle 41, a clay molded body having substantially the same cross-sectional shape as the shape of the discharge port 41 a Can be continuously supplied.
  • the discharge port 41a may be formed in a horizontally long waveform as shown in FIG.
  • the vacuum pump 51 is connected not only to the extrusion chamber 21 but also to a nozzle 42 via a suction pipe 53.
  • the connection position of the suction pipe 53 to the nozzle 42 is preferably a position near the rotary blade 30 and at a position where the raw material does not flow into the suction pipe 53.
  • the raw material supplied to the hopper 11 is operated by the kneading screw conveyor 14 and the extruding screw conveyor 24 in the same manner as the conventional extrusion molding machine. It is pressure-fed toward the nozzle 42 while being kneaded.
  • a rotation habit such as a twist due to the rotation action of the kneading screw conveyor 14 and the extruding screw conveyor 24 remains.
  • the rotary blade 30 is driven to rotate, the main blade 33 and the J blade 34 stir while cutting the raw material in various directions, so that the rotation habit is removed.
  • the raw material cut by the rotating blade 30 is compressed in the process of being conveyed to the tapered tip of the nozzle 42, and is integrated again.
  • the remaining air bubbles in the raw material inside the nozzle 42 are removed by the operation of the vacuum pump 51. Since the deaeration in the nozzle 42 is performed while the raw material is cut and stirred by the rotary blade 30, bubbles remaining in the raw material can be more efficiently removed.
  • the two rotating blades 30 vertically adjacent to each other rotate in opposite directions and at substantially the same rotational speed so that the raw material passes between the two (see FIG. 2).
  • the raw material passing between them receives substantially equal forces from the upper and lower main blades 33 and blades 34. Therefore, it is possible to prevent a new rotation habit from occurring in the raw material from which the rotation habit has been removed.
  • the clay molded body extruded from the outlet 41a of the base 41 has substantially completely removed the internal bubbles and the rotation habit. Therefore, even after the drying step and the sintering step, distortion and cracks are not generated in the clay molded body, and the quality and the yield can be favorably maintained.
  • the shaft 32 of the rotary blade 30 is disposed horizontally along a plane substantially perpendicular to the transport direction, but the axial direction of the shaft 32 may be any direction.
  • the rotating blade 30 may be arranged so that the direction of transport of the raw material and the axial direction of the shaft 32 are parallel.
  • the plurality of rotating blades 30 are arranged so that the shafts 32 are substantially parallel to each other, and the rotating directions of two adjacent rotating blades 30 are set to different directions, and the space between the two is set. It is preferable to configure the material to pass through.
  • the number and arrangement of the shaft 32, the main blade 33 and the rib blade 34 disposed in the nozzle 42 are not particularly limited, and the raw material conveyed through the nozzle 42 is not particularly limited. It is preferable to determine the value appropriately so that the whole can be stirred substantially uniformly. For example, it is possible to attach more main blades 33 to the shaft 32 than in this embodiment.
  • the shape of the main blade 33 is not limited to the above.
  • the main blade 33 extends vertically from the shaft 32.
  • the main blade 33 may be a disc-shaped member, as shown in FIG. 6 (b).
  • a through hole 331 is formed at a position where the sub-blade 34 is not provided to reduce the weight. And the transfer resistance of raw materials can be reduced.
  • the disk-shaped main blade 33 may be formed with a plurality of projecting blades along the outer peripheral surface.
  • the sub-blade 34 is preferably in the shape of a flat plate, but may be formed in various shapes such as a corrugated plate, a bar, or a hook. Further, the rotation habit of the raw material can be reduced by using only the main blade 33 without providing the sub blade 34.
  • a baffle plate 50 for preventing the raw material passing between the two rotating blades 30 from being conveyed by the rotating blade 30 to the side opposite to the discharge port 41 a It may be provided inside the nozzle 42. As shown in FIG. 8, the baffle plate 50 has a cutout 50a through which the main blade 33 and the sub-blade 34 can pass. However, the flow in the direction opposite to the discharge direction from the discharge port 41a is blocked.
  • the nozzle 42 is configured to be attached to the extrusion chamber 21 via a flange, but the nozzle 42 and the extrusion chamber 21 may be integrated. It is.
  • the nozzle 42 in each of the above embodiments can be used for various extruders other than the above-described extruders, and is particularly preferably used when manufacturing clay molded articles such as tiles and tiles. be able to.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

La présente invention concerne une buse pour une machine (42) de moulage par extrusion montée dans l'orifice de sortie (23) d'une machine de moulage par extrusion pouvant extruder un matériau constitué principalement d'argile à travers ladite sortie (23) à l'aide d'un transporteur à vis (24) d'extrusion, et comportant un orifice de distribution (41) qui permet d'expulser le produit formé. Cette buse est caractérisée en ce qu'elle comprend une lame rotative (30) qui agite le matériau chargé par rotation depuis l'intérieur de la buse (42). On peut empêcher la rotation du matériau, notamment la torsion provoquée par la rotation du transporteur à vis (24) d'extrusion, de façon à maintenir satisfaisantes la qualité et le rendement du produit formé sans provoquer de déformations ou de fissurations dans le produit formé.
PCT/JP2001/002458 2000-03-28 2001-03-27 Buse pour machine de moulage par extrusion, et machine et procede de moulage par extrusion WO2001072488A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001242802A AU2001242802A1 (en) 2000-03-28 2001-03-27 Nozzle for extrusion molding machine, and machine and method for extrusion molding

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000089005 2000-03-28
JP2000-89005 2000-03-28

Publications (1)

Publication Number Publication Date
WO2001072488A1 true WO2001072488A1 (fr) 2001-10-04

Family

ID=18604811

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/002458 WO2001072488A1 (fr) 2000-03-28 2001-03-27 Buse pour machine de moulage par extrusion, et machine et procede de moulage par extrusion

Country Status (3)

Country Link
AU (1) AU2001242802A1 (fr)
TW (1) TW482715B (fr)
WO (1) WO2001072488A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113043429A (zh) * 2021-03-18 2021-06-29 阜阳市辉堂新型建材有限公司 一种煤矸石烧结砖加工用混合挤出装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5170263U (fr) * 1974-11-27 1976-06-03
JPS55103909A (en) * 1978-01-04 1980-08-08 Shinpo Industrial Co Ltd Vacuum soil kneading machine
US5213737A (en) * 1991-12-02 1993-05-25 Corning Incorporated Extrusion method and apparatus for producing a body from powder material
JPH06807A (ja) * 1992-06-19 1994-01-11 Ngk Insulators Ltd 成形装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5170263U (fr) * 1974-11-27 1976-06-03
JPS55103909A (en) * 1978-01-04 1980-08-08 Shinpo Industrial Co Ltd Vacuum soil kneading machine
US5213737A (en) * 1991-12-02 1993-05-25 Corning Incorporated Extrusion method and apparatus for producing a body from powder material
JPH06807A (ja) * 1992-06-19 1994-01-11 Ngk Insulators Ltd 成形装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113043429A (zh) * 2021-03-18 2021-06-29 阜阳市辉堂新型建材有限公司 一种煤矸石烧结砖加工用混合挤出装置

Also Published As

Publication number Publication date
TW482715B (en) 2002-04-11
AU2001242802A1 (en) 2001-10-08

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