WO2001096075A2 - Fabrication de anses en argile - Google Patents

Fabrication de anses en argile Download PDF

Info

Publication number
WO2001096075A2
WO2001096075A2 PCT/GB2001/002542 GB0102542W WO0196075A2 WO 2001096075 A2 WO2001096075 A2 WO 2001096075A2 GB 0102542 W GB0102542 W GB 0102542W WO 0196075 A2 WO0196075 A2 WO 0196075A2
Authority
WO
WIPO (PCT)
Prior art keywords
clay
pressure
cavity
piston
cylinder
Prior art date
Application number
PCT/GB2001/002542
Other languages
English (en)
Other versions
WO2001096075A3 (fr
Inventor
Peter Pass
Robert Rushton
Original Assignee
Service (Engineers) Plc
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 Service (Engineers) Plc filed Critical Service (Engineers) Plc
Priority to AU74218/01A priority Critical patent/AU7421801A/en
Publication of WO2001096075A2 publication Critical patent/WO2001096075A2/fr
Publication of WO2001096075A3 publication Critical patent/WO2001096075A3/fr

Links

Classifications

    • 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
    • B28B3/206—Forcing the material through screens or slots
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
    • 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
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/0063—Control arrangements
    • B28B17/0081—Process control
    • 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
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/02—Conditioning the material prior to shaping
    • B28B17/026—Conditioning ceramic materials

Definitions

  • This invention relates to apparatus and a method for making handles for clay ware such as cups, mugs and the like.
  • extruded clay is injected into a heated die at high pressure.
  • the impact further plasticizes the clay, so that it assumes the shape of the die, and the outer skin of the handle is set by the heat.
  • the die is then opened for the handle to be removed.
  • the clay retains a 'memory' of its extruded shape, and once out of the die will try to return to it, so that the handle becomes misshapen.
  • apparatus for making clay handles comprises a die movable between closed and open positions, the die in the closed position having a cavity defining the shape of the handle, with the cavity having an inlet end and an outlet end, means for injecting clay under pressure into the inlet end of the cavity and pressure control means at the outlet end of the cavity on which the clay is adapted to act, the pressure control means being operative to control the pressure of the clay in the cavity and to shut off the clay injection means when the pressure of the clay in the cavity reaches a threshold value.
  • the pressure control means preferably comprises a piston working in a cylinder, the piston being acted on at one end by the clay and at the other end being subject to a fluid pressure in the cylinder, controlled by a regulator.
  • a fluid pressure in the cylinder controlled by a regulator.
  • the regulator preferably comprises a flow regulator which controls the fluid pressure in the cylinder by controlling fluid flow out of it as the piston is moved by the clay.
  • the cylinder is preferably a pneumatic cylinder, connected to a source of air under pressure. Pressurised air can then be introduced into the cylinder to return the piston to its rest position, on completion of handle formation.
  • the die On completion of handle formation the die is opened and the handle is separated from the clay inlet and outlet, and removed, preferably by a robotic arm, so that it can undergo further manufacturing processes.
  • the clay that has acted on the piston of the pressure control means forms a pellet, separate ofrom the handle, and located in the cylinder of the pressure control means. The pellet is expelled from the cylinder by the piston as it returns to its rest position.
  • the clay injection means preferably comprises a fluid-pressure-operated piston and cylinder injection assembly, with the injection piston acting on the clay to inject it into the die cavity.
  • the injection assembly may be pneumatic or hydraulic, with its operation controlled by the pressure control means.
  • a clay processing means is provided between the injection piston and the die, to break up and then re-form the clay under pressure. It has been found that this overcomes the problem with the 'memory' of the clay, so that the finished handle does not become misshapen.
  • the clay processing means comprises at least one perforated shredder plate, followed by a tapering nozzle.
  • the shredder plate or plates break the clay into separate streams, which then re-form into one stream in the tapering nozzle.
  • the holes may be circular or of any other appropriate shape.
  • the injection piston acts on a charge of clay, whose volume is sufficient to sustain a number of machine cycles.
  • a method of making a clay handle in a die movable between closed and open positions, the die in the closed position having a cavity defining the shape of the handle comprises the steps of injecting clay under pressure into an inlet end of the cavity in the closed die, allowing the clay at an outlet end of the cavity to act on a pressure control means, operating the pressure control means to control the pressure of the clay in the cavity, stopping injection of clay to the inlet end when the pressure of the clay in the cavity reaches a threshold value, opening the die and removing the handle.
  • the step of operating the pressure control means comprises allowing the clay at the outlet end to act on one end of the piston in opposition to the pressure in the cylinder acting on the other end of the piston, regulating the pressure in the cylinder, to control movement of the piston, and thus the pressure of the clay in the cavity.
  • the step of stopping the injection of clay to the inlet end is preferably performed by a signal from the pressure control means when the piston reaches a given position.
  • the step of injecting the clay may include passing the clay through clay processing means to break up and re-form the clay under pressure.
  • Figure 1 is a diagrammatic longitudinal section through apparatus for making clay handles
  • Figure 2 is a diagrammatic section on a larger scale of part of Figure 1.
  • the apparatus shown in the drawings for making clay handles comprises a die 1 movable between open and closed positions, and in the closed position having a cavity 2 defining the shape of the handle.
  • the cavity 2 has an inlet end 3 and an outlet end 4.
  • Clay is injected under pressure into the inlet end 3 by clay injection means 5 acting on a clay charge 6, and clay at the outlet end 4 acts on pressure control means 7, which is operative to control the pressure of the clay in the cavity 2 and to shut off the clay injection means when that pressure reaches a threshold value.
  • the die 1 is of two-part construction (only one part being shown in the drawings; the other part being a mirror image) .
  • Each part of the die 1 comprises a metal plate 8 attached to a backplate 9 slidable on a pair of rods 10, 11 to open and close the die.
  • the backplates 9 are moved by a fluid-pressure-operated means (not shown) , which normally clamp the die 1 in the closed position, to define the cavity 2.
  • the inlet end 3 of the cavity 2 is fed from the clay injection means 5, which comprises a cylinder 12 for receiving the cylindrical clay charge 6, acted on by a piston 13.
  • the clay injection means 5 which comprises a cylinder 12 for receiving the cylindrical clay charge 6, acted on by a piston 13.
  • the clay injection means 5 which comprises a cylinder 12 for receiving the cylindrical clay charge 6, acted on by a piston 13.
  • Each plate 14, 15 has circular holes 16 to allow passage of the clay.
  • the first plate 14 has larger holes than the second plate 15. Although the holes 16 are circular, it will be appreciated that they could be of any other appropriate shape.
  • the front end of the cylinder 12 has a tapering nozzle 17 terminating in an outlet 18 the same size as the inlet end 3 of the cavity 2.
  • the plates 14, 15 act to break up the clay into several streams which are reformed under pressure into a single stream by the nozzle 17, so that these parts form a clay processing means.
  • the cylinder 12 has an opening 19 for inserting the clay charge 6.
  • the piston 13 is of stepped outline, having a first part 20 of larger diameter working in the cylinder 12, a second part 21 of smaller diameter and a third part 22 of larger diameter working in a second cylinder 23.
  • the third part 22 and the second cylinder 23 form a fluid power drive piston- and-cylinder assembly.
  • the cylinder 23 is divided by the piston part 22 into two chambers 24, 25, each having a respective port 26, 27 connected via a respective solenoid-operated valve 28, 29 to a source of fluid pressure 30.
  • Each valve 28, 29 is operative to connect the respective chamber 24, 25 to the pressure source 30, or to atmosphere, or in a neutral position to neither, in order to maintain the pressure in the chamber.
  • the piston 13 can therefore be controlled as required.
  • the outlet end 4 of the cavity 2 is connected to the pressure control means 7.
  • This comprises a piston 31 working in a pneumatic cylinder 32, with a single chamber 33.
  • the chamber 33 has an inlet port 34 connected to a source of pneumatic pressure 35 through an inlet valve (not shown) .
  • the chamber 33 also has an exhaust port 36 connected to atmosphere through a flow regulator 37.
  • a flow regulator 37 In the initial position shown in Figure 2, there is a predetermined pressure in the chamber 33, with the connection to the pressure source 35 and the flow regulator 37 both being closed.
  • the piston 31 is pushed into the cylinder 32 by the clay from the outlet end 4, and the rate of pressure increase in the chamber 33 and thus the rate of movement of the piston 31 is controlled by operation of the flow regulator 37.
  • the piston 31 When the piston 31 reaches the end of its stroke, there will be a predetermined pressure in the chamber 33, and thus the clay in the cavity 2 will also be at a predetermined threshold pressure. At the end of the piston stroke, the piston 31 operates a switch 38, which sends a signal to the clay injection means 5 to hold the pressure in the chamber 25. As explained in more detail below, the piston 31 is returned to its initial position by pressurising the chamber 33 from the pressure source 35.
  • the method of making clay handles using the apparatus shown in the drawings is as follows. With the pistons 13, 31 in the initial positions shown in the drawings the die 1 is closed and clamped, and the die plates 8 heated to an appropriate temperature. A cylindrical charge 6 of clay is prepared with suitable lubricant, and is then inserted into the cylinder 12 via the opening 19. The charge 6 is of sufficient size to satisfy a number of machine cycles.
  • the valve 29 is operated to pressurise the chamber 25, to advance the piston 13, which presses the clay through the plates 14, 15 and into the nozzle 17.
  • the lubricants assist in the homogenisation process of the re-forming of the clay.
  • the clay leaves the outlet 18 under pressure, and enters the cavity 2 at the inlet end 3.
  • the clay passes through the cavity 2 in the heated die, and comes out at the outlet end 4, where it acts on the piston 31 of the pressure control means 7.
  • the clay pushes the piston 31 into the cylinder 32, and its rate of movement and the rate of pressure increase in the chamber 33 is controlled by operation of the flow regulator 37.
  • At the end of the stroke of the piston 31 there is a predetermined pressure in the chamber 33 and therefore a predetermined pressure of the clay in the cylinder 32 acting on the piston 31, and of the clay in the cavity 2. This is chosen to ensure that the cavity 2 is filled by the clay, and that there are no voids in the clay.
  • the piston 31 operates the switch 8, sending a signal to the clay injection means 5 to switch the valve 29 to the neutral position to hold the pressure in the chamber 25. This stops the piston 13, so that no more clay leaves the outlet 18.
  • the die 1 is then opened, leaving the handle in place. Because the die 1 is heated, the handle does not stick to it, and the outer surface of the handle is set by the heat.
  • the handle is then separated from the inlet and outlet and removed, preferably by a robotic arm (not shown) , and taken for further manufacturing steps.
  • the clay that has been through the cavity 2 and ends up in the cylinder 32 forms a pellet.
  • This is removed from the cylinder 32 as the piston 31 is returned to its initial position, by pressurising the chamber 33 by connecting it to the pressure source 35.
  • the die 1 can then be closed again, and the chamber 25 connected to the pressure source 30, to advance the piston 13 again to make another handle in the same way. This continues until the charge 6 is used up.
  • the piston 13 is then returned to its initial position by exhausting the chamber 25, and pressurising the chamber 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

L'invention concerne un appareil pour fabriquer des anses en argile, comportant un moule (1) mobile entre une position ouverte et une position fermée, dans laquelle une cavité (2) définit la forme de la anse. Cette cavité (2) a un orifice d'entrée (3) et un orifice de sortie (4). L'appareil comprend des moyens (5) pour injecter l'argile sous pression dans l'orifice d'entrée (3) et des moyens de régulation de la pression (7) à l'orifice de sortie (4). L'argile agit sur les moyens de régulation de la pression (7), qui régulent la pression de l'argile dans la cavité (2) et arrêtent les moyens (5) d'injection de l'argile lorsque la pression de l'argile dans la cavité atteint une valeur seuil. Les moyens de régulation de la pression (7) assurent le remplissage de la cavité (2) en argile à un niveau suffisant pour la plastification, de sorte qu'il n'y a pas de vides dans la anse.
PCT/GB2001/002542 2000-06-10 2001-06-11 Fabrication de anses en argile WO2001096075A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU74218/01A AU7421801A (en) 2000-06-10 2001-06-11 Making clay ware handles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0014095.4 2000-06-10
GB0014095A GB0014095D0 (en) 2000-06-10 2000-06-10 Making clay ware handles

Publications (2)

Publication Number Publication Date
WO2001096075A2 true WO2001096075A2 (fr) 2001-12-20
WO2001096075A3 WO2001096075A3 (fr) 2002-03-14

Family

ID=9893321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/002542 WO2001096075A2 (fr) 2000-06-10 2001-06-11 Fabrication de anses en argile

Country Status (3)

Country Link
AU (1) AU7421801A (fr)
GB (1) GB0014095D0 (fr)
WO (1) WO2001096075A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014042844A1 (fr) * 2012-09-13 2014-03-20 Halliburton Energy Services, Inc. Système de circulation de fluide pour fluides de forage et de complétion
CN111251419A (zh) * 2020-03-31 2020-06-09 常灿华 一种日用陶瓷把坯机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781547A (en) * 1951-12-26 1957-02-19 Honeywell Regulator Co Molding procedure and apparatus
GB833360A (en) * 1956-05-10 1960-04-21 British United Shoe Machinery Improvements in or relating to the production of articles of ceramic ware
FR1256676A (fr) * 1960-02-12 1961-03-24 Perfectionnements au moulage sous pression
DE1899756U (de) * 1964-02-07 1964-08-27 Horst Reich Vorrichtung an strangpressen fuer keramische massen zur erwaermung des durchlaufenden gutes.
US3457606A (en) * 1965-03-23 1969-07-29 Heinz Posch Injection moulding apparatus
FR2619047A1 (fr) * 1987-08-07 1989-02-10 Stratime Cappello Systemes Sar Dispositif pour injecter un beton de resine dans un moule pour permettre son remplissage
EP0364205A2 (fr) * 1988-10-11 1990-04-18 Ngk Insulators, Ltd. Dispositif pour préparer des blocs de matériau et méthode de moulage de produits céramiques utilisant ce dispositif

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781547A (en) * 1951-12-26 1957-02-19 Honeywell Regulator Co Molding procedure and apparatus
GB833360A (en) * 1956-05-10 1960-04-21 British United Shoe Machinery Improvements in or relating to the production of articles of ceramic ware
FR1256676A (fr) * 1960-02-12 1961-03-24 Perfectionnements au moulage sous pression
DE1899756U (de) * 1964-02-07 1964-08-27 Horst Reich Vorrichtung an strangpressen fuer keramische massen zur erwaermung des durchlaufenden gutes.
US3457606A (en) * 1965-03-23 1969-07-29 Heinz Posch Injection moulding apparatus
FR2619047A1 (fr) * 1987-08-07 1989-02-10 Stratime Cappello Systemes Sar Dispositif pour injecter un beton de resine dans un moule pour permettre son remplissage
EP0364205A2 (fr) * 1988-10-11 1990-04-18 Ngk Insulators, Ltd. Dispositif pour préparer des blocs de matériau et méthode de moulage de produits céramiques utilisant ce dispositif

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014042844A1 (fr) * 2012-09-13 2014-03-20 Halliburton Energy Services, Inc. Système de circulation de fluide pour fluides de forage et de complétion
CN111251419A (zh) * 2020-03-31 2020-06-09 常灿华 一种日用陶瓷把坯机

Also Published As

Publication number Publication date
WO2001096075A3 (fr) 2002-03-14
GB0014095D0 (en) 2000-08-02
AU7421801A (en) 2001-12-24

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