US3921336A - Method and apparatus for blasting - Google Patents

Method and apparatus for blasting Download PDF

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Publication number
US3921336A
US3921336A US493391A US49339174A US3921336A US 3921336 A US3921336 A US 3921336A US 493391 A US493391 A US 493391A US 49339174 A US49339174 A US 49339174A US 3921336 A US3921336 A US 3921336A
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Prior art keywords
abrasive
endless belt
roller
blasting
contact
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Expired - Lifetime
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US493391A
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English (en)
Inventor
Yasuhiro Nishio
Hirosi Yonekubo
Takeo Matuzawa
Tosiki Hanamura
Kunimoto Ishibayashi
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Resonac Holdings Corp
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Showa Denko KK
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts

Definitions

  • ABSTRACT An endless belt and a roller held in contact with said endless belt are turned at high rates of speed and at the same time an abrasive is delivered to the point of contact between said endless belt and said roller, whereby the abrasive is projected at a high rate of speed to impinge upon and blast the surface of an object subjected to cleaning which is placed at the plane of impingement.
  • An apparatus for the purpose of this blasting comprises a blasting chamber incorporating therein an endless belt, a contact roller kept in contact with the endless belt, an abrasive feeder and an object subjected to blasting, apparatus such as, for example, a bucket elevator adapted to return the used abrasive to the abrasive feeder and a hopper.
  • apparatus such as, for example, a bucket elevator adapted to return the used abrasive to the abrasive feeder and a hopper.
  • This invention relates to a method for blasting metallic, plastic, ceramic and other similar objects for thereby imparting satin finish patterns to metal surfaces, cleaning metal surfaces of adhering matter, scale and oxide film, exposing metal matrix, cleaning plastic and ceramic objects of adhering matter and removing them of fin, with the blasting effected by impacting an abrasive at a high rate of speed against said objects. It also relates to an apparatus which is used for practicing the method of blasting described above.
  • a pneumatic method utilizes the expansion force of compressed air and a centrifugal method makes use of the centrifugal force generated by the rotation of an impellers. These methods are available for the purpose of blasting metallic objects.
  • Substances which are usable as abrasives for such methods are artificial abrasive, sand particles, shot (steel spheres measuring from 0.2mm to 2.8mm in diameter), glass beads and nutshell powder, for example.
  • the pneumatic method accomplishes the desired blasting of a given metallic object by utilizing a jet or forceful rush of such an abrasive as mentioned above ,which is produced by blowing said abrasive through a nozzle by means of compressed air.
  • the abrasive is blown out through the nozzle at a high pressure.
  • the diameter of the nozzle must be limited and, as a result, the zone covered by the jet of the abrasive is inevitably limited proportionally.
  • This maintenance of high .pressure entails use of large volumes of air and accelerates the wear of the nozzle with the result that the cost of nozzle replacement is increased accordingly.
  • the centrifugal method effects the required blasting of a given object by rotating at a high rate of speed a rotary shaft which is disposed at the center of a rotary cylinder and provided with radially arranged blades and at :the same time delivering an abrasive to the center of :shortened to a great extent.
  • the abrasive itself is disintegrated because of the vortex motion of air between the blades and the backward flow of air at the tips of the blades which are caused by the rotation of the rotary shaft and addition- 2 ally because of the impact of the blades in motion against the ambient air.
  • the intensity of the blasting force being exerted on the surface of the object is not the same in the rotating direction of the rotary shaft and in the axial direction thereof and the blasting itself tends to be effected to the greatest depth at the center of the object.
  • One object of this invention is to provide a method for blasting which permits the surface of an object subjected to treatment to be blasted smoothly and uniformly without entailing any appreciable wear of the abrasive.
  • Another object of this invention is to provide a method for blasting which enables large volumes of objects to be blasted in a short priod of time.
  • Still another object of this invention is to provide an apparatus for blasting which enables desired blasting of given objects to be effected continuously with high efficiency.
  • a method for blasting an object subjected to blasting treatment characterized by using an arrangement wherein an endless belt held taut in position by two spaced supporting rollers and a contact roller are disposed in such a relationship that said contact roller is held against said endless belt at a portion separated from the zones in which the endless belt comes into contact with its supporting rollers, causing the endless belt and the contact roller to turn at high rates of speed and at the same time feed an abrasive toward the point of contact between the endless belt and the contact roller, whereby the abrasive is caught and forwarded by virtue of the contact between the mutually approaching surfaces of the endless belt and the contact roller and then projected out at a high rate of speed so as to impinge upon and blast the surface of said object which is disposed in the path of the jet of abrasive.
  • an apparatus characterized by comprising a blasting chamber having disposed therein an endless belt which is held taut in position by a roller and a movable adjusting roller, a movable contact roller which is held against said endless belt at a portion separated from the zones in which the endless belt comes into contact with its supporting rollers, a feeder which opens in the direction of the neighborhood of the point of contact between said endless belt and the contact roller and a means which is adapted to hold in position an object subjected to the blasting treatment, a hopper disposed above the feeder and adapted to accommodate the abrasive, a discharge outlet disposed at the bottom of the blasting chamber, a means such as, for example, a bucket elevator disposed between the hopper and the discharge outlet to the hopper and a driving means capable of turning the rollers at high rates of speed.
  • FIG. 1 is a rough front sectional view of the apparatus of the present invention.
  • FIG. 2 is a front view of the important parts of one preferred embodiment of the unit for the projection of abrasive.
  • FIG. 3 is a partially cutaway side view illustrating the details of the roller and the adjusting roller which serve to hold the endless belt in position.
  • FIG. 4 is a top view of the contact roller.
  • FIG. 5 shows another embodiment in which the apparatus of this invention is used for blasting both work surfaces of an object.
  • FIG. 6 is a graph showing the condition of breakage observed to occur on an abrasive of fused alumina grains during its repeated use in blasting according to the method of this invention.
  • FIG. 7 is a graph showing the condition of breakage observed to occur on an abrasive of fused alumina grains during its repeated use in blasting according to the pneumatic method.
  • FIG. 8 is a graph showing the condition of breakage observed to occur on an abrasive of silicon carbide during its repeated use in blasting according to the method of this invention.
  • FIG. 9 is a graph showing the condition of breakage observed to occur on an abrasive of silicon carbide during its repeated use in blasting according to the pneumatic method.
  • FIG. 1 is a rough front view of one embodiment of the apparatus according to this invention.
  • a means adapted to hold in position the object subjected to blasting treatment is denoted by 7.
  • a belt conveyor laid through the blasting chamber functions as the means 7.
  • the object 8 subjected to blasting treatment is shown positioned on the conveyor belt 7.
  • the endless belt 4 is revolved at a high rate of speed by means of the roller 2 and the adjusting roller 3 and, at the same time, the contact roller 5 is rotated so that both the endless belt 4 and the contact roller 5 turn at the same peripheral speed. Simultaneously a granular abrasive is supplied by the feeder 6. Particles of the abrasive are caught and carried forward between the mutually approaching surfaces of the contact roller 5 and the endless belt 4 and then projected in the direction of the object 8. Since the endless belt 4 and the contact roller 5 both travel at high rates of speed, the individual particles of the abrasive are tremendously accelerated by the momentum frictionally transferred from their surfaces. Consequently, the particles are projected at an extremely high rate of speed to impinge upon and blast the object.
  • the endless belt 4 is formed of a rubber belt or an abrasive belt and the contact roller has its surface covered with a rubber sheet or an abrasive fabric, possibility of breakage which may occur to particles of the abrasive while being moved forward between the two surfaces will be diminished to an extreme extent, and the particles are projected at the velocity generated because of the frictionally transferred force at the projecting angle 0
  • projecting angle 0 refers to that angle which is formed between the line along which the particles are projected and the surface of the object being blasted.
  • the velocity at which the abrasive is projected is determined by the peripheral speed of the endless belt and the coefficient of rolling friction of the particles of abrasive.
  • the coefficient of rolling friction is determined by the diameter and shape of particles of abrasive, the rigidity and coarseness of the material of endless belt, etc.
  • the projecting angle 6 is determined by the diameters of the roller 2 and the contact roller 5 and the relative position at which the contact roller 5 is held in contact with the endless belt 4. This angle can be adjusted as required.
  • the particles of abrasive which have been projected travel in a path of a fixed width 1 as illustrated in the diagram.
  • the magnitude of this width 1 is variable with the interposing angle 0,.
  • the aforementioned interposing angle 6 or the proportion of the portion of the circumference of the contact roller held in contact with the endless belt to its entire circumference is too small, then the particles of abrasive cannot be projected at a sufficiently high velocity. Any excess of this angle over its upper limit proves disadvantageous, and only adds to the wear of the belt and the roller.
  • the desirable range of interposing angle (9 is from l5to 50.
  • grooves When grooves are formed on the roller and the ad justing roller, they serve to protect the belt from adverse effects (such as flappling, deviation or break down of belt) which otherwise would be caused when irregularly reflected particles of abrasive possibly fly into the opening between the rollers and the endless belt.
  • the endless belt is illustrated as being advanced in a vertical direction and the path of the projected particles of abrasive as being directed downward, it is naturally optional that the path of the projected abrasive be obtained in any desired direction by properly changing the relative positions of the rollers and the endless belt.
  • the desirable range of peripheral speed of the end less belt is from to 80 m/sec. More specifically, desirable results are obtained by selecting the peripheral speed of the endless belt from the following ranges, depending on the specific gravity of the abrasive particles.
  • the particle size of the abrasive to be used has its 1 upper limit at 6mm.
  • the desirable range of the particle size is from lu to 2mm.
  • An abrasive having a particle size smaller than the lower limit of this range gives a rejectable blasting effect.
  • the blasting produces a coarse surface and fails to give a cleaner finish.
  • the apparatus of this invention designed to effect the method of this invention enables the method described above to be carried out continuously with high effifor example, particle size finer than 140p,
  • FIG. 5 is a front view of another embodiment of the apparatus according to this invention:
  • One plate given as an object 8 to be subjected to blasting is made to travel over a plurality of rollers arranged so as to serve as a means 7 for holding the object in a position desirable for blasting, so that the plate can be blasted on both surfaces.
  • This apparatus possesses the same devices as those illustrated in FIG. 1, except for another device for the projection of the abrasive.
  • the numerals 2, 3', 4', 5 and 6' denote additional roller, adjusting roller, endless belt, contact roller and feeder respectively.
  • the used abrasive which has been conveyed by the bucket elevator is supplied simultaneously to the feeder 6 and to the feeder 6.
  • Use of the apparatus shown in FIG. 5 enables a plate material of large width to be blasted simultaneously on both surfaces.
  • 6 denotes a feeder for the abrasive and 4 an endless belt which is held in position by a roller 2 and an adjusting roller 3 and revolved in the direction indicated by the arrow mark.
  • the roller 2 is supported around a shaft 14 and this shaft 14 is provided at one end with a pulley 15 and is interlocked through the pulley with a driving means such as, for example, a motor.
  • 16 is a supporting frame.
  • the roller 2 is fixed in position by means of the supporting frame 16 and a supporting base 17 which is attached to the supporting frame.
  • the adjusting roller 3 is supported by a shaft 18, and the shaft 18 is supported by an adjusting roller supporting means 19.
  • This adjusting roller supporting means 19 is connected via an air cylinder 20 to the supporting base 17.
  • the numeral 27 denotes a tracking adjuster having threads cut on its outer face.
  • the screw portion of the tracking adjuster engages an internally tapped hole formed in the adjusting roller supporting means 29. Desired adjustment of the position of the shaft 18 can be obtained by turning said screw portion.
  • the adjusting roller 3 is integrally connected to the adjusting roller supporting means 19. Thus, it can be moved vertically on the supporting base 17 by means of the air cylinder 20. That is to say, the tension of the endless belt can be changed by suitably varying the distance between the roller and the adjusting roller.
  • the contact roller denoted by 5 is attached by the medium of a contact roller supporting means 22 to a supporting frame 16. As illustrated, the contact roller supporting means is provided with oblong holes 23.
  • the contact roller supporting means. 22 is attached to the supporting frame 16 by means of bolts 24. Since the oblong holes 23 have allowance on the righthand and lefthand sides with reference to the diagram, the position of the contact roller supporting means 22 can be moved within the longitudinal length of those oblong holes.
  • a stationary base plate denoted by 25 is connected to the contact roller supporting means 22 by means of a bolt 26. The bolt 26 is passed through an internally tapped hole formed in the contact roller supporting means 22, with the screw on the bolt fitting the inner threads of said hole.
  • the contact roller supporting means 22 can be moved within the aforementioned oblong holes 23 7 within the range of the motion allowed by the bolts 24. This means that the position of the contact roller can be changed by turning the bolt 26.
  • the method and apparatus according to this invention can be used for blasting objects of all kinds of substances.
  • they are as effective as the treatment using acid pickling.
  • round steel bars are desired to be blasted, for example, a multiplicity of round steel bars are spaced by about 2mm and arranged in such a way that their axes are at right angles with the axes of the individual rollers and then they are moved in the axial direction with the abrasive projected thereto.
  • the projected particles of abrasive while in the process of passing the spaces intervening the bars, interfere with one another to give blasting uniformly to the entire surface of these bars. Similar effects are obtained in the case of materials such as stainless steel wires 5mm in diameter.
  • the blasting by the method and apparatus of this invention can be effected with unusually high efficiency and sufficient uniformity.
  • the surface wear by this blasting is negligibly small.
  • the amount of dust suffered to occur in the case of this invention is small as compared with any other known methods.
  • the blasting operation by this invention can be carried out continuously and automatically. In these and many other ways, this invention is advantageous.
  • EXAMPLE 1 In an apparatus having a construction like that shown in FIG. 1, a roller 2 measuring 200mm in diameter and 100mm in width was used and an aluminum plate was placed on a belt conveyor at a distance of 250mm from the center of the roller 2 and a distance of 380mm from the center of a contact roller 5, with the interposing angle 6 and the projecting angle 0 fixed respectively at 15 and An adjusting roller 3 was fixed at such a position that the line drawn to connect the centers of the roller 2 and the adjusting roller 3 fell at a perpendicular distance (L) of 225mm from the center of the contact roller 5. The roller 2 was rotated at the rate of 5750 rpm and an abrasive of fused alumina grains having a particle size of N0.
  • EXAMPLE 2 In an effort to demonstrate the present inventions feature that wear of the abrasive during repeated use in blasting is extremely low, the results of blasting performed by the method and apparatus according to this invention were compared with those obtained by the conventional pneumatic method.
  • An apparatus having a construction like that shown in FIG. 1 was used and an abrasive of fused alumina grains of particle size No. 24 (the curve of a continuous line in the graph of FIG. 6) was employed.
  • An endless belt 100mm in width was revolved at the rate of 2000 m/minute.
  • An ordinary steel plate was placed at a distance of 300mm from a contact roller, with the projecting angle 0 fixed at Under these conditions, blasting was performed with the same abrasive used in a total of five cycles.
  • the particle size of the abrasive prior to the blasting and that after five cycles of blasting were as shown in FIG. 6.
  • the horizontal axis represents the graduation of sieve mesh and the vertical axis that of weight ratio (in percentage).
  • the continuous line represents the values of the abrasive obtained prior to the blasting operation and the dotted line the values of the abrasive obtained after five cycles of blasting.
  • Comparison of the curves reveals that the proportion of grains of small particle size increased only slightly as a whole, though the grains which initially had the minimum particle size of 420p. gave rise to grains of a particle size of the order of 70;; in consequence of blasting. This shows that even after five cycles of blasting the abrasive was not appreciably disintegrated.
  • the continuous line represents the values of particle size ratios existing prior to the blasting operation
  • the dotted line represents the values found after six cycles of blasting
  • the alternate one short and one long dash line represents the values found after 23 cycles of blasting
  • the broken line represents the values found after 50 cycles of blasting.
  • COMPARATIVE EXAMPLE (WITH EXAMPLE 3) Blasting was performed by faithfully repeating the procedure of Example 2, except for an abrasive which was made of SiC having a particle size of No. 24.
  • the results are shown in FIG. 9.
  • the continuous line represents the values of particle size ratios existing prior to the blasting operation
  • the broken line represents the values found after six cycles of blasting
  • the alternate one short and one long dash line represents the values found after cycles of blasting.
  • Example 3 grains having a particle size of 500p accounted for 50% even after 50 cycles of blasting. In contrast, in this case, grains having a particle size of 500p accounted for less than 10% by weight after only 10 cycles of blasting.
  • Example 3 since the abrasive was a mixture of two SiC grades having different particle sizes No. 24 and No. 30, grains of 500g accounted for the initial maximum weight proportion. In the comparative example, since the abrasive was solely composed of one SiC grade of a particle size No. 24, grains of 710p. ac-
  • the blasting was performed in much the same way as in Example 1, with the efficiency of blasting and the loss of abrasive determined.
  • the efficiency of blasting was rated in terms of the length of time required for obtaining a fixed surface finish, with the time required in the use of the abrasive of fused alumina grains taken as unity (I).
  • the losss of abrasive was rated in terms of the amount of a given abrasive lost during one cycle of blasting, with the amount lsot in the case of abrasive of fused alumina grains taken as unity (1). The results are shown in the following table.
  • Emery 1.4 1.92 White pig iron grit 1.7 0.14 Chromium slug 1.1 3.59 Nickel slug 1.4 4.33 Copper slug 2.9 2.03
  • fused alumina has a composition of 95.7% by weight (the same applies invariably to percentages given hereinafter) of Al- O 0.8% of SiO 0.5% of Fe O and 2.5% of TiO silicon carbide of 98.5% of SiC and 0.2% of free carbon, garnet of 38.0% of SiO 33.8% of FeO, 0.45% of TiO 2.23% of CaO, 0.21% of MgO, 20.95% of A1 0 and 1.22% of MnO.
  • chromium slug refers to the slug which is produced in the refinement of ferrochromium and has a composition of 5.4% of CrO 28.7% of SiO 2.8% of FeO, 28.0% of A1 0 2.8% of CaO and 30.6% of MgO.
  • nickel slug refers to the slug which occurs in the refinement of ferronickel and has a composition of 0. 1 2% ofNiO, 6.13% of FeO, 31.6% of MgO, 56.77% of SiO 0.98% of A1 0 and 1.19% of CaO.
  • Copper slug occurs in the refinement of copper and it has a composition of 4.1% of A1 0 37.7% of SiO 40.5% of FeO, 0.5% of Cu and 6.5% of CaO.
  • Siliceous sand has a composition of 0.4% A1 0 and 98.8% of SiO EXAMPLE 5
  • Ordinary steel plates, aluminum plates and stainless steel plates were blasted in accordance with the same method and apparatus as those in Example 1 by using varying grades of fused alumina grains with different particle sizes as abrasives. The degrees of surface coarseness obtained on the metal plates are shown below. The numerical values given in the table represent highest depths of blasting.
  • an endless belt 350mm in width, a roller 250mm in diameter, an adjusting roller 250mm in diameter and a contact roller 250mm in width were disposed as illustrated and the endless belt was revolved at a peripheral speed of 3500 mm/minute and a steel plate was moved at the rate of 2.9 m/minute, with the magnitudes L (defined in Example 11), 0 (interposing angel) and 9 (projecting angle) varied as indicated below.
  • L defined in Example 11
  • 0 interposing angel
  • 9 projecting angle
  • a method for blasting which comprises: disposing l an endless belt supported in position by two rollers, (2) a contact roller held in contact against said endless belt at a point separated from I I the zones in which Said endless belt comes into 3. a blasting chamber containing therein said device contact with said supporting rollers, (3) an abrafor Projecting the abfasive and Said means for sive feeder the opening of which is directed toward lhg the ob ect, the point at which said contact roller and said end- 3 hooper dlsposed above 531d feeder and Provlded l b l reach h Starting point f Contact when with a means for delivering into the feeder its consaid endless belt is put to motion and (4) an object tents subjected to blasting treatment which is positioned a discharge Outlet formed at the bottom of the at a distance from the point at which the contact blasting Chamber and adapted to discharge the between said contact roller and said endless belt used abrasive from Within the blasting Chamber, terminates and causing
  • adriving means for imparting high-speed rotations said abrasive between the mutually pp oa hin to the rollers and said endless belt, said rollers and surfaces of said contact roller and said endless belt, 5 Sa d be t be ng dri en at substantially the same rate whereby the abrasive is projected at a high rate of of speed and in opposite directions. speed by means of the momentum of the motion of 3.
  • the means for said roller and said endless belt so as to impinge accommodating the object is a belt conveyor laid upon the object being treated. through the blasting chamber.
  • An apparatus for blasting which comprises: 4. The apparatus of claim 2, wherein an additional 1. a device for projecting an abrasive, consisting of device for projecting the abrasive is disposed opposite (a) a roller, (b) an adjusting roller positioned at a from said device for projecting the abrasive.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Cleaning In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US493391A 1973-08-09 1974-07-31 Method and apparatus for blasting Expired - Lifetime US3921336A (en)

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JP48088837A JPS5038194A (ja) 1973-08-09 1973-08-09

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JP (1) JPS5038194A (ja)
DE (1) DE2438450A1 (ja)
FR (1) FR2240077B1 (ja)
GB (1) GB1437658A (ja)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4160650A (en) * 1978-04-20 1979-07-10 Nfe International, Ltd. Sand core cleaning apparatus with double roller delivery of cleaning material
US4174591A (en) * 1978-04-20 1979-11-20 Nfe International Ltd. Apparatus for cleaning sand cores
WO1982003591A1 (en) * 1981-04-13 1982-10-28 Int Co Harvester Abrasive liquid jet cutting
US4798027A (en) * 1987-09-01 1989-01-17 Niigata Engineering Co., Ltd. Method of and apparatus for sandblasting workpiece
US5203124A (en) * 1991-05-03 1993-04-20 Pangborn Corporation Wire mesh conveyor abrasive machine and abrasive return system therefor
US5360486A (en) * 1993-08-06 1994-11-01 Blast Cleaning Products Ltd. Blast cleaning apparatus and method with laterally moving conveyor
US5637029A (en) * 1993-11-22 1997-06-10 Lehane; William B. Method and apparatus for shot blasting materials
EP0798081A2 (en) * 1996-03-26 1997-10-01 Kamei Tekkosho Ltd. Method and blasting apparatus for grinding the surface of a work
US6569217B1 (en) 2000-05-10 2003-05-27 Thomas M. DeMarco Industrial dust collector with multiple filter compartments
US20050107004A1 (en) * 2003-11-13 2005-05-19 Brampton Brick Limited Method and apparatus for removing flash from a brick
US10335924B2 (en) * 2012-09-10 2019-07-02 Vulkan Inox Gmbh Method and blasting means for producing a satinized finish on an aluminium substrate

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5113493A (ja) * 1974-07-25 1976-02-02 Showa Denko Kk Kensosochi
JPS5523800Y2 (ja) * 1975-10-09 1980-06-06
JPS5443388A (en) * 1977-09-12 1979-04-05 Showa Denko Kk Shot blasting method
JPS5417492U (ja) * 1978-06-20 1979-02-03
DE3231787A1 (de) * 1982-08-26 1984-03-01 BKW Handels- und Vertriebsgesellschaft, 6940 Weinheim Transportable strahlgutschleuder

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1436120A (en) * 1920-04-07 1922-11-21 Whiting Corp Sand-throwing head for molding machines
US2663980A (en) * 1949-10-14 1953-12-29 John F Harper Polishing method and material
US3090166A (en) * 1959-02-17 1963-05-21 Bell Intercontinental Corp Polishing method and device
US3098324A (en) * 1961-05-01 1963-07-23 Bell Intercontinental Corp Polishing method and means
US3243920A (en) * 1963-09-27 1966-04-05 Jr William B Hannum Cutting apparatus
US3328925A (en) * 1965-06-17 1967-07-04 Exton John M Process for ornamenting glass articles
US3696565A (en) * 1970-12-30 1972-10-10 Wheelabrator Frye Inc Method for deflashing ceramic materials

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1436120A (en) * 1920-04-07 1922-11-21 Whiting Corp Sand-throwing head for molding machines
US2663980A (en) * 1949-10-14 1953-12-29 John F Harper Polishing method and material
US3090166A (en) * 1959-02-17 1963-05-21 Bell Intercontinental Corp Polishing method and device
US3098324A (en) * 1961-05-01 1963-07-23 Bell Intercontinental Corp Polishing method and means
US3243920A (en) * 1963-09-27 1966-04-05 Jr William B Hannum Cutting apparatus
US3328925A (en) * 1965-06-17 1967-07-04 Exton John M Process for ornamenting glass articles
US3696565A (en) * 1970-12-30 1972-10-10 Wheelabrator Frye Inc Method for deflashing ceramic materials

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4160650A (en) * 1978-04-20 1979-07-10 Nfe International, Ltd. Sand core cleaning apparatus with double roller delivery of cleaning material
US4174591A (en) * 1978-04-20 1979-11-20 Nfe International Ltd. Apparatus for cleaning sand cores
WO1982003591A1 (en) * 1981-04-13 1982-10-28 Int Co Harvester Abrasive liquid jet cutting
US4798027A (en) * 1987-09-01 1989-01-17 Niigata Engineering Co., Ltd. Method of and apparatus for sandblasting workpiece
US5203124A (en) * 1991-05-03 1993-04-20 Pangborn Corporation Wire mesh conveyor abrasive machine and abrasive return system therefor
US5360486A (en) * 1993-08-06 1994-11-01 Blast Cleaning Products Ltd. Blast cleaning apparatus and method with laterally moving conveyor
US5417608A (en) * 1993-08-06 1995-05-23 Blast Cleaning Products Ltd. Blast cleaning apparatus and method with laterally moving conveyor
US5637029A (en) * 1993-11-22 1997-06-10 Lehane; William B. Method and apparatus for shot blasting materials
EP0798081A2 (en) * 1996-03-26 1997-10-01 Kamei Tekkosho Ltd. Method and blasting apparatus for grinding the surface of a work
EP0798081A3 (en) * 1996-03-26 1998-05-20 Kamei Tekkosho Ltd. Method and blasting apparatus for grinding the surface of a work
US6569217B1 (en) 2000-05-10 2003-05-27 Thomas M. DeMarco Industrial dust collector with multiple filter compartments
US20050107004A1 (en) * 2003-11-13 2005-05-19 Brampton Brick Limited Method and apparatus for removing flash from a brick
US10335924B2 (en) * 2012-09-10 2019-07-02 Vulkan Inox Gmbh Method and blasting means for producing a satinized finish on an aluminium substrate

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Publication number Publication date
FR2240077B1 (ja) 1978-08-11
FR2240077A1 (ja) 1975-03-07
JPS5038194A (ja) 1975-04-09
DE2438450A1 (de) 1975-03-06
GB1437658A (en) 1976-06-03

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