| Vapormaster
“Special Purpose” machine for cleaning
and surface finishing of TV plunger tools The machine is a wet blast cabinet for treating the surface of NiW plated screen plungers using aluminous oxide. The water / aluminous oxide slurry is pumped to a process nozzle and accelerated by an airjet onto the plunger surface. The nozzle is tracked evenly across the surface by a CNC controlled multi-axis manipulation. Process Cabinet: The cabinet and sump are made from fibre reinforced composite mounted in a rigid box section frame. This method of construction eliminates the possibility of ferrous contamination within the cabinet. All internal fittings are stainless steel. The use of composite acoustic panels also reduces noise levels compared to sheet steel construction. |
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| (Above). Vapormatt Machine Processed TV Tube Plunger (top) & unprocessed plunger (bottom). | |||||||||||||||||
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To the right of the process cabinet is a load end complete with cabinet rails to assist in the loading of plungers via a trolley unit. Access to the cabinet is via a safety interlocked hinged door. A continuous running high speed cyclone unit is provided for the removal of broken down media. The waste outlet from the cyclone is then fed via a series of sedimentation tank filters. Recirculated rinse water is supplied via further filtering through a cartridge system and diaphragm pump. |
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Optional extras can include auto abrasive and auto chemical dosing.
The blasting process utilises a urethane gun fitted with a boron carbide nozzle which has X - left to right movement and Y - front to back movement which direct the gun across the surface of the stationary plunger. The unit is controlled via a PLC and processes the plunger in a “lawnmower” type pattern. A “waggle” programme can be used
to eliminate banding from the surface of the plunger. |
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| TV Tube Plunger Cleaning Machine showing loading of tv tube plunger via load end trolley. | |||||||||||||||||
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Vapormatt Process: The latest specifications for the internal surface finish of glass tv tubes are calling for ever finer finishes with extremely consistent visual and Ra surface roughness reaching across the whole surface. The use of a semi CNC - Vapormatt Wet Blast Process allows this joint aim to be met - aims difficult to achieve with more basic dry blasting equipment. Vapormatting is also a wet and so dust-free process which eliminates the danger of hazardous NiW particles entering the workplace environment. |
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