METHOD AND DEVICE FOR TREATING, ESPECIALLY CLEANING, ABRASIVE CLEARING OR STRIPPING OF COATINGS, GRAFFITI OR OTHER SUPERFICIAL SOILING ON PARTS, WORK PIECES OR SURFACES

摘要

The invention relates to a method and device for treating, especiallycleaning, abrasive clearingor removing of coatings (1), graffiti or other superficial soiling on parts,work pieces or surfaces(3). A blasting means (2) is gravity fed from a holding container (11) to acarrying air stream (5)which is transported inside a hose guiding system constructed with outgoingand incoming lines.The blasting means are fed through said carrying air flow by low pressure,and, in a blastingchamber (25), are blasted against the surface (3) which is to be treatedthrough a blasting lance(22). From the blasting chamber, said blasting means are transported back tothe carrying airstream (5) in such a way that the blasting means (2) are circulated. Theacceleration of theblasting means is essentially generated by the low pressure applied on theblasting chamber (25)and by increasing the blasting velocity in an acceleration section (L) byreducing the diameter ofthe outgoing line in the acceleration section (L). The low pressure outgoingline (20) is connectedto a linear acceleration tube (21) which forms an acceleration section (L).The acceleration tubewhich comprises a diameter reduction compared to that of the outgoing line isarranged beforesaid blasting lance (22).