blast guns’ oscillating motion
The blast guns’ oscillating motion reduces the number of nozzles required for uniform coverage, and lowers the machine’s compressed-air requirements.

The GUYSON CORP. Model TR-900 through-belt conveyor blast systems have an oscillating motion for the blast guns that reduces the number of nozzles required for uniform coverage and lowers the blasting machine’s compressed-air requirements. Components are conveyed in and out of the blast chamber by a rubber or steel mesh belt, which may be fitted with guide rails to ensure parts are properly aligned for single or multiple lane media-blast treatment. The belt can be made with cleats or part-holding fixtures attached to orient the components. Conveyor belt speed is adjustable from zero to approximately 20 fpm. The stroke length and speed of the gear motor-driven oscillation mechanism can be adjusted and synchronized with the belt feed rate.

Up to 14 blast guns are rigidly mounted on multi-adjustable brackets at the correct angles and distances to direct their blast stream onto targeted component surfaces. After impinging on the processed parts, blast media particles are collected in a hopper at the base of the finishing enclosure, fed into return ducts, and pneumatically conveyed to the inlet of the system’s cyclone separator and media reclaimer, where dust and fines are removed from circulation and effective-sized media are channeled back to the blasting guns. The track extensions on the entry and exit of the machine are fitted with vacuum return catch trays to reclaim media carried out of the blast chamber. A full width side-hinged door provides access for gun inspection, adjustment, and maintenance.

The TR-900 conveyor blast system may be used with a variety of blast media, so it is suitable for many different in-line impact treatment applications, including deburring, deflashing, surface preparation, and cosmetic finishing. When components must be finished on all sides in a single pass, the machine can be configured with an alternate routing of the conveyor belt to permit positioning of fixed or oscillating blast guns under the component, however, only parts of a certain minimum length can be processed in the “S-belt” version of the machine.

An energy-saving option adds an electronic sensor to detect the presence of components on the in-feed conveyor and signal the programmable logic controller (PLC) to activate the blast guns. When parts feeding is interrupted, the blast guns can be turned off automatically. A media level sensing option is available, too, with automatic blast media replenishment. All settings and control functions are accessed using via a compact touch-screen interface that is normally mounted on a freestanding console electrical enclosure. The panel displays data on monitored blast process parameters and system status indicators, including faults such as a full dust drum or low air supply pressure.

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