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)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19858049

Family Applications (1)

Country Status (5)

Cited By (3)

Families Citing this family (1)

Citations (5)

• 1990
  • 1990-11-28 NL NL9002605A patent/NL9002605A/nl not_active Application Discontinuation
• 1991
  • 1991-11-28 EP EP92900552A patent/EP0559747A1/en not_active Withdrawn
  • 1991-11-28 JP JP4502177A patent/JPH06502800A/ja active Pending
  • 1991-11-28 AU AU90481/91A patent/AU9048191A/en not_active Abandoned
  • 1991-11-28 WO PCT/NL1991/000241 patent/WO1992009525A1/en not_active Application Discontinuation

Patent Citations (5)

Also Published As

Similar Documents

Legal Events