EP1852221A1 - Vorrichtung und Verfahren zur Herstellung von Trockeneis-Partikeln - Google Patents

Vorrichtung und Verfahren zur Herstellung von Trockeneis-Partikeln Download PDF

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Publication number
EP1852221A1
EP1852221A1 EP07008626A EP07008626A EP1852221A1 EP 1852221 A1 EP1852221 A1 EP 1852221A1 EP 07008626 A EP07008626 A EP 07008626A EP 07008626 A EP07008626 A EP 07008626A EP 1852221 A1 EP1852221 A1 EP 1852221A1
Authority
EP
European Patent Office
Prior art keywords
dry ice
toothed roller
grinding
teeth
machine
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07008626A
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English (en)
French (fr)
Inventor
Attilio c/o MEC S.r.l. Bernasconi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MEC Srl
Original Assignee
MEC Srl
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 MEC Srl filed Critical MEC Srl
Publication of EP1852221A1 publication Critical patent/EP1852221A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2

Definitions

  • the present invention concerns a machine and a method for producing and blasting dry ice particles in order to clean surfaces with sublimable material.
  • solid CO 2 particles and pellets for cleaning surfaces is already known and particularly appreciated in a large kind of applications.
  • the solid carbon dioxide particles do not make abrasions on the hit surface and, after knocking the surface to be cleaned, they sublime in a short time and dissipate in the atmosphere in a gas form and without leaving residual products.
  • the machine includes a feeding tank in which is inserted a dry ice block with a parallelepiped form.
  • a transporting and thrusting device in the tank presses the block against a rotating plate with blades which remove dry ice grains from the block and carry them directly to a blast system which uses compressed air to transport dry ice grains against the surface to be cleaned. Because it is not realized any temporarily storage of the dry ice grains, it is provided the possibility to automatically control the production speed of dry ice grains operating on the transporting and thrusting device on the tank.
  • this machine can be fed only with dry ice pieces with little dimensions, for example pieces with a cylindrical form (usually named pellets) with a variable diameter from 3 to 5 mm and variable length from 5 to 40 mm.
  • a weight is necessary to push the dry ice pieces to be ground against the rotating plate, because the weight of the material it is not sufficient to bring the material in contact to the grinding plate and in any case this weight changes as a function of the filling grade of the tank.
  • the object of the present invention is to propose a machine for producing and blasting dry ice particles which could be fed with different types of dry ice pieces as regards their forms and dimensions.
  • Another object of the present invention is to propose a machine of the above mentioned type that is particularly simple ed economical to realize.
  • a further object of the present invention is to propose a machine which allows to change in a simple and immediately way the granulometry of the dry ice particles produced between at least one pair of different values.
  • a machine for producing and blasting dry ice particles including at least one feeding tank in which the dry ice is loaded in the form of pieces to be ground, the feeding tank having at least one exit opening near at least one grinding unit, and means for blasting dry ice particles produced by the grinding unit through a delivery nozzle, characterized in that the grinding unit includes a toothed roller rotated near the exit opening of the feeding tank.
  • the toothed roller exercises a moving and pulling action on pieces with different shape and dimensions, without requiring thrusting or transporting elements of the pieces, and such as to allow a simple feeding by gravity.
  • the feeding tank for the dry ice pieces to be ground is preferably located on the top of the toothed roller, with a symmetry axis substantially perpendicular to the support surface of the machine.
  • a machine according to the present invention is thus suitable to receive many typologies of dry ice pieces among the more common ones as regards shape and dimensions.
  • pellets with a diameter of 10-16-19 mm and length of 30-70 mm, cylindrical "tablets" with variables diameters between 50 and 70 mm and thickness of 10-20 mm, or even tablets or tiles with thickness up to 50 mm.
  • the machine is anyway suited to receive even pieces with irregular shape with respect to the most common ones, for example pieces recycled from blocks or crushed tiles.
  • the toothed roller is preferably located upper to a temporary storage hopper of the dry ice particles.
  • An auger is put in rotation by an electrical motor on the bottom of the hopper for transporting the dry ice particles to the blasting means.
  • the temporary storage allows to provide the blasting means with a uniform flow rate of dry ice particles, so as to allow a continuous and constant particles outflow.
  • the symmetry axis of the tank is incident with the rotation axis of the toothed roller.
  • the toothed roller can be turned both clockwise and anticlockwise direction, without affecting the moving and pulling action exercised by the toothed roller on the pieces to be ground.
  • control means including for example an inverter or the like, which operate on an electrical motor which drives in rotation the toothed roller, and which allow the regulation of the rotating speed of the roller.
  • the toothed roller preferably includes a plurality of grinding teeth protruding from the surface of the roller and having essentially a triangular cross section.
  • the symmetry axis of the tank is offset with respect to the rotating axis of the toothed roller.
  • the machine can be fed even with tiles having major thickness compared with those useable with the previous embodiment.
  • the machine includes a casing 1 which contains a feeding tank 10 in which the dry ice pieces to be ground are charged through a closable hatch 2. All parts of the tank and of the machine which are in contact with the dry ice, which is at a temperature no more than about -78°C, are of course insulated or anyway thermally insulated with respect to the casing 1.
  • the machine according to the invention can be realized with particularly limited dimensions, so that it will be easy to move it, and it can also have wheels fixed at the bottom of the casing 1 or it can be placed and/or installed on a trolley provided with wheels (not shown).
  • the feeding tank 10 vertically extends with symmetry axis S essentially perpendicular to the support surface P of the machine, in such a way as to favour the feeding of the dry ice pieces by gravity to a grinding roller 20 located in underlying position to the tank 10 in correspondence with an opening 15 ( Figures 2A and 2B).
  • the grinding roller is activated in rotation by an electrical motor 30 through motion transmission means 31 which connect the respective shafts, and the rotation of the grinding roller 20 is subject to control means (not shown) which are able to regulate the rotation speed of the roller 20 and to change its rotating direction.
  • the manual command of the principal functions of the machine is available to an operator by a command panel 3 located on the front part of the machine.
  • the dry ice particles obtained by grinding are temporarily collected into a hopper 40 before being transferred to the blasting means 50 through a rotating auger 45 driven in rotation on the bottom of the hopper 40 by a motor 55.
  • the temporary storage of the particles allows to obtain a constant and uniform outflow of the particles, which is necessary to obtain a good quality of cleaning and removal.
  • the blasting means 50 can consist of any type of known suitable means.
  • the particles can be taken out by a Venturi effect from a pressurized air flow and thus directed to the delivery nozzle through a suitable flexible tube which is connected to a pipe fitting 51 on the machine.
  • the blasting means 50 can include a distributor of the "revolver" type, with a rotating drum provided with suitable seats in which the particles are deposited and thrown away by a pressurized air flow.
  • the rotation of the drum can also be given by the same motor 30 which activates the roller 20.
  • the tank 10 is located with its symmetry S axis incident to the rotating axis R of the grinding roller 20.
  • the machine is suitable to work with many typologies of dry ice pieces and the grinding roller 20 can be rotated in both directions (bi-directional arrow CA) to take advantage of some favourable characteristics which will be described below in a more detailed way.
  • the symmetry axis S of the tank 10 is offset with reference to the rotating axis R of the grinding roller 20.
  • it can be eventually provided a guide chute 41 (shown in dotted line) to facilitate the descent of the pieces fed into contact with the roller 20.
  • the machine according to the invention is suitable to be fed with "tiles" of about 50 mm of thickness but maintaining the rotation of the roller 20 according to the direction indicated by the arrow A. With other pieces of different shape and/or smaller dimensions it is instead possible to let the grinding roller 20 rotates in both directions.
  • the grinding roller 20 is preferably constituted by a roller having a plurality of teeth 21 protruding from the surface of the roller and having a substantially triangular cross section.
  • the surface of the roller 20 is preferably without holes, so that the dry ice particles removed from the pieces subject to grinding are directly released in the hopper 40.
  • the teeth 21 are aligned on the roller 20 along helical lines 22 of one or more principles.
  • the helical lines of one or more principles for example can converge to the centre of the roller as schematically represented in Figure 4A, or they can be oriented in the same direction as indicated in Figure 4B.
  • the number of principles, their disposition an their orientation can be selected according to the more suitable moving effect for the shape and dimensions of the dry ice pieces that are usually fed to the machine.
  • each tooth 21 meets the dry ice pieces with the larger surface, that of the face 23, and so it produces particles with a greater granulometry with respect to the case in which the roller 20 is driven in the opposite direction.
  • the roller 20 is rotated in the clockwise direction (arrow C)
  • only the edge 24 essentially works on the dry ice pieces to be ground, so it produces dry ice particles with a smaller granulometry.
  • some of the teeth 21 can have a cusp 25 inclined with reference to a radial axis passing through each of them.
  • This embodiment is schematically illustrated in Figure 6, in which some teeth 21' are inclined in the opposite direction with reference to other teeth 21", always with reference to radial axes D passing through each of the teeth 21', 21".

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
  • Crushing And Grinding (AREA)
EP07008626A 2006-05-05 2007-04-27 Vorrichtung und Verfahren zur Herstellung von Trockeneis-Partikeln Withdrawn EP1852221A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20060892 ITMI20060892A1 (it) 2006-05-05 2006-05-05 Macchina e metodo per produrre e lanciare particelle di ghiaccio secco

Publications (1)

Publication Number Publication Date
EP1852221A1 true EP1852221A1 (de) 2007-11-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07008626A Withdrawn EP1852221A1 (de) 2006-05-05 2007-04-27 Vorrichtung und Verfahren zur Herstellung von Trockeneis-Partikeln

Country Status (2)

Country Link
EP (1) EP1852221A1 (de)
IT (1) ITMI20060892A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008122625A2 (de) * 2007-04-05 2008-10-16 Berger, Oliver Vorrichtung und verfahren zur oberflächenbearbeitung bzw. oberflächenbehandlung mittels trockeneisgranulat
EP2208578A1 (de) * 2008-07-23 2010-07-21 Takewa Kougyou Kabushiki Kaisha Sprengreinigungsverfahren sowie verfahren und vorrichtung zur herstellung von darin verwendetem festem kohlendioxid
WO2016123681A2 (en) 2015-02-02 2016-08-11 Pieter Turck Dry lubricating conveyor belt equipment
WO2017127935A1 (en) 2016-01-27 2017-08-03 Coulson Ice Blast Ltd. Ice blasting system and method
US20200246055A1 (en) * 2017-09-20 2020-08-06 Aestheticare Gmbh Apparatus for making dry ice particles, method for operating same, medical dry ice particles, method for making same and uses thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576821A1 (fr) * 1985-02-04 1986-08-08 Carboxyque Francaise Installation pour la projection de particules de glace carbonique
US20030064665A1 (en) * 2001-09-28 2003-04-03 Opel Alan E. Apparatus to provide dry ice in different particle sizes to an airstream for cleaning of surfaces
DE10163852A1 (de) * 2003-03-03 2003-07-03 Otto Littmann Maschinenfabrik Vorrichtung zum Eisstrahlen
US6626737B1 (en) * 2002-04-12 2003-09-30 Ullens De Schooten Pascal Machine to produce and propel sublimable solid particles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576821A1 (fr) * 1985-02-04 1986-08-08 Carboxyque Francaise Installation pour la projection de particules de glace carbonique
US20030064665A1 (en) * 2001-09-28 2003-04-03 Opel Alan E. Apparatus to provide dry ice in different particle sizes to an airstream for cleaning of surfaces
US6626737B1 (en) * 2002-04-12 2003-09-30 Ullens De Schooten Pascal Machine to produce and propel sublimable solid particles
DE10163852A1 (de) * 2003-03-03 2003-07-03 Otto Littmann Maschinenfabrik Vorrichtung zum Eisstrahlen

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008122625A2 (de) * 2007-04-05 2008-10-16 Berger, Oliver Vorrichtung und verfahren zur oberflächenbearbeitung bzw. oberflächenbehandlung mittels trockeneisgranulat
WO2008122625A3 (de) * 2007-04-05 2008-12-18 Berger Oliver Vorrichtung und verfahren zur oberflächenbearbeitung bzw. oberflächenbehandlung mittels trockeneisgranulat
US8430722B2 (en) 2007-04-05 2013-04-30 Tq-Systems Gmbh Device for processing or treating surface by means of a dry ice granulate
EP2208578A1 (de) * 2008-07-23 2010-07-21 Takewa Kougyou Kabushiki Kaisha Sprengreinigungsverfahren sowie verfahren und vorrichtung zur herstellung von darin verwendetem festem kohlendioxid
EP2208578A4 (de) * 2008-07-23 2011-06-15 Takewa Kougyou Kabushiki Kaisha Sprengreinigungsverfahren sowie verfahren und vorrichtung zur herstellung von darin verwendetem festem kohlendioxid
WO2016123681A2 (en) 2015-02-02 2016-08-11 Pieter Turck Dry lubricating conveyor belt equipment
WO2017127935A1 (en) 2016-01-27 2017-08-03 Coulson Ice Blast Ltd. Ice blasting system and method
CN109311063A (zh) * 2016-01-27 2019-02-05 科尔森冰爆有限公司 冰喷射系统和方法
EP3393684A4 (de) * 2016-01-27 2019-02-20 Coulson Ice Blast Ltd. Eisstrahlsystem und -verfahren
AU2017210772B2 (en) * 2016-01-27 2019-05-09 Coulson Ice Blast Ltd. Ice blasting system and method
US10350729B2 (en) 2016-01-27 2019-07-16 Coulson Ice Blast Ltd. Ice blasting system and method
AU2017210772B9 (en) * 2016-01-27 2019-08-08 Coulson Ice Blast Ltd. Ice blasting system and method
US20200246055A1 (en) * 2017-09-20 2020-08-06 Aestheticare Gmbh Apparatus for making dry ice particles, method for operating same, medical dry ice particles, method for making same and uses thereof

Also Published As

Publication number Publication date
ITMI20060892A1 (it) 2007-11-06

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