EP0559747A1 - Mould to be used for compacting pellets - Google Patents

Mould to be used for compacting pellets

Info

Publication number
EP0559747A1
EP0559747A1 EP92900552A EP92900552A EP0559747A1 EP 0559747 A1 EP0559747 A1 EP 0559747A1 EP 92900552 A EP92900552 A EP 92900552A EP 92900552 A EP92900552 A EP 92900552A EP 0559747 A1 EP0559747 A1 EP 0559747A1
Authority
EP
European Patent Office
Prior art keywords
mould
holes
spraying
producing
cleaning
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Withdrawn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
EP92900552A
Other languages
German (de)
French (fr)
Inventor
Huibert Konings
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.)
HARKO BV
Original Assignee
HARKO BV
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 HARKO BV filed Critical HARKO BV
Publication of EP0559747A1 publication Critical patent/EP0559747A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B30B11/20—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring
    • B30B11/201—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring for extruding material
    • B30B11/202—Ring constructions
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/50—Carbon dioxide
    • C01B32/55—Solidifying

Definitions

  • Mould to be used for compacting pellets.
  • the invention concerns an annular mould as used in so-called pelletisers where powder through radial holes in the annular mould is pressed by rollers. By breaking off the bars which are formed this way short pieces with the profile of the hole in the mould are formed.
  • the subject mould of the invention is a special means to compact carbon dioxide powder (solid CO 2 at a temperature below minus 56°) into tough bars with a triangle cross section. These bars are very suitable to be used for cleaning surfaces by spraying. It has been proved that the spraying material stays sharp even when some sublimation occurs by the spraying action.
  • the subject of the invention is a mould to produce small bars of heavy compressed carbon dioxide with a triangle cross section.
  • the mould has the form of a ring and is used in a machine where rollers on the inside of the ring press the powdered carbon dioxide into radial holes. These holes are narrowing and converge into a channel with a triangle cross section. The end of the channel carries means to break the bars.
  • Fig. 1 shows the mould and the rollers.
  • Fig. 2 shows a cross section of the mould at the position of the holes.
  • Fig. 3 shows the inside of the mould.
  • Fig. 4 shows the outside of the mould.
  • Fig. 5 shows the cross section of the space between two holes.
  • Fig. 6 shows the cross section of the partition between two triangular channels
  • Fig. 7 shows a pellet produced with the mould.
  • Fig. 8 shows an alternative pattern of hales.
  • Fig, 1 (1) is the annular mould and (2) the rollers which roll along the inside (3). Centerlines (4) indicate schematic the position of the holes (5).
  • Fig. 2 shows that the holes (5) have a converging part (6) that converts in a mainly triangle channel (7) with mainly parallel sides (8). At the end of the channel (7) is a widening outlet (9).
  • At (10) is indicated that two holes (5) are connected into one hole while the channels (7) are formed by a partition (11).
  • the partition (11) is chamfered (12) at the entry.
  • On the outlet the partition (11) can have a breaking edge (13) which breaks the bars of compressed carbon dioxide.
  • FIG. 5 is indicated how walls (14) between holes (5) and (10) are chamfered (15).
  • Fig. 7 is shown a spraying particle (19) produced with a annular mould (1) according to the invention.
  • Fig. 8 shows an alternative pattern of singular holes (5).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Glanulating (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Crushing And Grinding (AREA)

Abstract

Cette invention concerne un moule annulaire (1) utile pour produire des pellets se présentant sous forme de barres courtes ayant une section transversale triangulaire. Les pellets sont formés par la pression des cylindres (2) s'exerçant sur la partie intérieure (3) du moule (1), ladite pression forçant la neige carbonique réduite en poudre (dioxyde de carbone) à traverser les orifices radiaux. Lesdists orifices comprennent un orifice d'admission convergent, une rainure pourvue de côtés globalement parallèles et un orifice de sortie évasé. Ce système peut également comporter des séparations comprenant un dispositif permettant de couper la barre pour obtenir des pellets courts.The invention relates to an annular mold (1) useful for producing pellets in the form of short bars having a triangular cross section. The pellets are formed by the pressure of the cylinders (2) exerted on the interior part (3) of the mold (1), said pressure forcing the carbon dioxide snow reduced to powder (carbon dioxide) to pass through the radial orifices. The port holes include a converging inlet port, a groove with generally parallel sides, and a flared outlet port. This system can also include partitions comprising a device making it possible to cut the bar to obtain short pellets.

Description

Mould to be used for compacting pellets.
The invention concerns an annular mould as used in so-called pelletisers where powder through radial holes in the annular mould is pressed by rollers. By breaking off the bars which are formed this way short pieces with the profile of the hole in the mould are formed. The subject mould of the invention is a special means to compact carbon dioxide powder (solid CO2 at a temperature below minus 56°) into tough bars with a triangle cross section. These bars are very suitable to be used for cleaning surfaces by spraying. It has been proved that the spraying material stays sharp even when some sublimation occurs by the spraying action.
The treatment of surfaces with carbon dioxide particles is known from the American patent Nr. US-A-4389820. It is found that the normal proces of compressing and crushing of solid carbon dioxide results in irregular and blunt spraying material.
The subject of the invention is a mould to produce small bars of heavy compressed carbon dioxide with a triangle cross section. The mould has the form of a ring and is used in a machine where rollers on the inside of the ring press the powdered carbon dioxide into radial holes. These holes are narrowing and converge into a channel with a triangle cross section. The end of the channel carries means to break the bars.
The invention is described with the help of the drawings.
Fig. 1 shows the mould and the rollers.
Fig. 2 shows a cross section of the mould at the position of the holes. Fig. 3 shows the inside of the mould.
Fig. 4 shows the outside of the mould.
Fig. 5 shows the cross section of the space between two holes.
Fig. 6 shows the cross section of the partition between two triangular channels,
Fig. 7 shows a pellet produced with the mould.
Fig. 8 shows an alternative pattern of hales.
In Fig, 1 (1) is the annular mould and (2) the rollers which roll along the inside (3). Centerlines (4) indicate schematic the position of the holes (5).
Fig. 2 shows that the holes (5) have a converging part (6) that converts in a mainly triangle channel (7) with mainly parallel sides (8). At the end of the channel (7) is a widening outlet (9).
At (10) is indicated that two holes (5) are connected into one hole while the channels (7) are formed by a partition (11). The partition (11) is chamfered (12) at the entry. On the outlet the partition (11) can have a breaking edge (13) which breaks the bars of compressed carbon dioxide.
In Fig. 5 is indicated how walls (14) between holes (5) and (10) are chamfered (15).
In Fig. 7 is shown a spraying particle (19) produced with a annular mould (1) according to the invention.
The pattern of the holes (5) and (10) is concentrated in the middle section (16). The area's (17) along the edge of the inside surface (3) are provided with shallow grooves (18). These grooves (18) prevent jamming of the machine in case of superfluous supply of carbon dioxide. Fig. 8 shows an alternative pattern of singular holes (5).

Claims

Claims.
1] Annular mould for producing by pressing particles meant for cleaning of surfaces by means of spraying characterised in that the mould (1) on the inside (3) is provided of holes (5) and (10) in radial direction which converge to mainly triangle channels (7) with mainly parallel sides (8) which convert into a widening outlet (9) on the outside surface of the mould. 21 Annular mould for producing by pressing particles meant for cleaning of surfaces by means of spraying as in claim 1 characterised in that a part of the holes (5) are combined in two's with a partition (11) between the triangle channels (7) and together with the singular holes (5) form a pattern of nearby placed holes (5), (10) in a disk (16) which is about in the centre of the ring (1).
31 Annular mould for producing by pressing particles meant for cleaning of surfaces by means of spraying as in claim 1 and 2 characterised in that the partition (11) between triangle channels (7) on the side directed to the centre is provided with chamfers (12) and on the side of the outlet (9) is provided with a breaking edge (13).
41 Annular mould for producing by pressing particles meant for cleaning of surfaces by means of spraying as in claim 1, 2 and 3 characterised in that the inside surface (3) of the ring is provided with grooves (18) which reach from the edge to close to the holes (5), (10),
51 Annular mould for producing by pressing particles meant for cleaning of surfaces by means of spraying as in claim 1, 2, 3, and 4 characterised in that the mould (1) is used to compress dry ice (powdered solid CO2) into short bars (19) with a triangular profile.
EP92900552A 1990-11-28 1991-11-28 Mould to be used for compacting pellets Withdrawn EP0559747A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9002605A NL9002605A (en) 1990-11-28 1990-11-28 DIE FOR PRESSING PELLETS.
NL9002605 1990-11-28

Publications (1)

Publication Number Publication Date
EP0559747A1 true EP0559747A1 (en) 1993-09-15

Family

ID=19858049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92900552A Withdrawn EP0559747A1 (en) 1990-11-28 1991-11-28 Mould to be used for compacting pellets

Country Status (5)

Country Link
EP (1) EP0559747A1 (en)
JP (1) JPH06502800A (en)
AU (1) AU9048191A (en)
NL (1) NL9002605A (en)
WO (1) WO1992009525A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9301237A (en) * 1993-07-14 1995-02-01 Harko Bv Method for treating surfaces with cryogenic particles
NL194233C (en) * 1994-08-17 2001-10-02 Huibert Konings Pelletizing device, for pressing cryogenic particles.
NL1013692C2 (en) * 1999-11-29 2001-05-30 Huibert Konings Method for manufacturing cryogenic particles from liquid carbonic acid.
CN105584087A (en) * 2015-12-23 2016-05-18 格薪源生物质燃料有限公司 Vertical ring die biomass fuel briquetting forming machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1388692A (en) * 1963-02-15 1965-02-12 Richard Sizer Ltd Improved extrusion die especially for moldable or plastic materials
FR2134874A5 (en) * 1971-04-23 1972-12-08 Novacel Sa Multi section extrusion die - for mfg irregular sodium sulphate crystals for seeding synthetic sponges
US3702519A (en) * 1971-07-12 1972-11-14 Chemotronics International Inc Method for the removal of unwanted portions of an article by spraying with high velocity dry ice particles
DE8803364U1 (en) * 1988-03-12 1988-05-05 Bloch, Klaus, 5205 St Augustin, De
FR2633706B1 (en) * 1988-06-29 1992-02-14 Anhydride Carbonique Ind SOLID CARBON DIOXIDE PRODUCT, PACKAGING DEVICE AND PRODUCT PACKAGING METHOD

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9209525A1 *

Also Published As

Publication number Publication date
NL9002605A (en) 1992-06-16
AU9048191A (en) 1992-06-25
WO1992009525A1 (en) 1992-06-11
JPH06502800A (en) 1994-03-31

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