Scrapper Type Blast Rooms

Operating Principle : The job is placed inside the blast room and the blasting operation is carried out by operator manually. Used abrasive falls down into the scrapper unit from where it is conveyed by longitudinal scraper conveyors to cross scrapper conveyor. The cross scrapper conveyor conveys the abrasive media into boot of bucket elevator. The bucket elevator lifts the media and pours into media separation unit from where the reusable abrasive goes into the Portable Abrasive Blaster and Abrasive is recycled through blast nozzle. The unusable abrasive from the media separator unit is collected in a bin.

Description : Scrapper recovery Floor & Grating on Floor : (sketchmatic diagram enclosed) Surface’s exclusive Scraper (Flat-Track) system, the newest type of recovery floor, uses pneumatic power and a ladder like arrangement of steel frame to move the blast media. This scraper floor has many features that separate it from those offered by our competitors i.e. this system does away the problem of jamming of metallic vanes. The scrapers comprise of a natural rubber flap set against a steel comb, multiples of which are set in 10? long frames. This assembly is then adjoined to others to form a corridor running the length of the blast booth.

Available in standard widths, each corridor moves in a reciprocating back and forth motion. Because the distance between the scrapers is less than the distance of travel, each scraper moves abrasive forward, as the rubber flap in this direction is locked against the steel comb behind it, to the next (A) in a shunting motion. On the reverse stroke the rubber scraper blade, unhindered in this direction by the steel comb, is free to pass over the previous scrapers deposit of abrasive (B). The abrasive is pushed forward to a final corridor positioned at right angles to the booth where it conveys the abrasive to an elevator and is recycled.

The depth of the recovery channel is only 5″ ensuring that in many instances, ie. Those where objects being taken into the booth may be carried by hand, it can be located directly onto an existing factory floor. When a flush finish is required between the factory floor and the blast room, only minor excavation is required.

Developed initially for the steel grit and shot, the scraper works well most blast media. Its key advantages include a low profile, requiring little or no excavation, low purchase and installation costs.

The scraper floor requires less maintenance than other mechanical floors which contributes to its greater operational economy.

Additionally, the scraper takes less time to install than other mechanical systems. The feature helps cut down on lost production time when the scraper is installed as a replacement system in an existing enclosure

The scraper system is covered by a pedestrian grating on which the operator stands and through which the abrasive falls. In certain applications when heavy items are being processed, this grating can be increased in strength to provide greater loading capacities.

An alternative method of supporting a heavier item is to incorporate rails into the floor, positioned conveniently between the recovery corridors on which a cart can be mounted.

Full Floor Scrapper Recovery System
1 Longitudinal Scraper unit As per blast room size
2 Longitudinal cylinders 16” stroke , 2 1/2” bore dia
3 Cross Scraper unit As per blast room size
4 Cross scrapper cylinders 16” stroke , 3” bore dia
5 Drive motor for bucket elevator 3.0 HP, 415V/3P/50 Hz. geared motor.
6 Belt of Bucket Elevator 100 mm X 10 mm.
7 Size of bucket elevator 240 mm x 640 mm.