SandBlasting Equipments & Supplies

It is possible to build a homemade sand blasting cabinet unit and an apparatus of this kind may be constructed from an old dishwasher housing since it is the right size for a good sand blasting cabinet,especially since it has a deep well bottom that can hold the abrasive material/sand. It may need to be plugged at the bottom after all the worx have been stripped and it should be made permanent.

The dishwasher housing of the homemade sand blasting cabinet can be mounted on a wooden base so as to enable the arms to be at a comfortable height above the ground.

In the side of the DW housing, for example, the arm holes may be cut with a sawzall or metal cutting jigsaw and these may then be fitted or lined or both with a four inch PVC fitting. Inside the sandblaster, the rubber gloves may be hose clamped to the PVC on the inside and for obtaining the salvage gloves needed, one can start to search at a safety equipment supply store. In addition, the gloves should be heavy as well as entirely rubber coated, when being used to make the sand blasting cabinet on ones own.

The sand blasting cabinet will generally have its air supplied to a spray gun through an air compressor that is of adequate size and if it can be as big as possible, so much the better. A subsidiary intake that can be modified with an extension such as flex pipe/hose can be used for the spray gun and can be inserted into the reservoir of sand which is at the bottom of the DW housing, via a hole in the work surface screen.

When the compressed air from the compressor is sent out of the gun, it will draw sand through the intake that has been bedded into the sand pile at the bottom of the housing and will then be jetted out along with the compressed air and has good sandblasting force.

Of course, different sands will behave differently and the sand as well as some of the blasted detritus will together find their way back to the bottom of the DW housing. This entails that the sand be cleaned and changed occasionally.

In addition, the small diameter screen that is lying across the intake helps to keep the nozzle of the gun free from clogging and the shopvac hose which is inserted in another penetration at the top of the DW housing can be used, during sandblasting,to remove dust. There should also be a light mounted in the housing which should be placed across from the view port and should point in the direction where the work will be.

Also, the unit will be closed during operation and a drying filter in the compressed air line will greatly help and may also be used to vary the flow of air.

What is Sandblasting?

A relatively new method of cleaning newly built masonry is dry sandblast cleaning and one really needs to learn how to sandblast in order to learn all its intricacies and uses. Sandblast cleaning is used and in fact, preferred by architects as well as engineers who typically use it instead of conventional cleaning due to the fact that it does not have adverse effects, like acid reaction.

However, there are also still those, such as designers who do not favor sandblasting because they fear that blasting will erode the brick’s face as well as mortar joints.

The sandblast operator is very similar to a construction tradesman and a well qualified sandblast operator, who follows instructions properly, will enable sandblast cleaning to be superior to other systems. The basic functions that need to be understood in regards to learning how to sandblast are that it needs the use of portable air compressors, blasting tanks, blasting nozzles, operator’s protective clothing as well as hoods.

When learning how to sandblast one needs to understand that air pressure should be delivered by a compressor to the blasting tank at 40lbs. to 100lbs. per square inch. In addition, the blasting tank needs to be charged with certain abrasive material and should also be pressurized so that the mixture of abrasive material and air is forced into the blasting hose as well as to the nozzle.

Also, when learning how to sandblast, the pattern of blasting can be found by considering the size of the nozzle as well as its type and the air pressure. To find out the speed of cleaning, the type of abrasive used, size of the nozzle, its type and pressure of air as well as distance-to-wall should be considered along with  the condition of the surface that needs cleaning. Mostly, sand is used as abrasive material when cleaning bricks, though quartz and granite are also used and, these should be clean and finely graded.

The cleaning material used in sandblasting should adhere to the particle size that is specified as being either Type “A” or Type “B”. Type “A” is used for masonry which is very little soiled or when light or to permit delicate texturing of the brickwork. Type “B” is used to clean heavy mortar stains from brickwork and to permit medium texturing of the masonry.

The matter of how to sandblast is best understood when one understands its reasons for use. For example, sandblast cleaning can be used to clean all hard burned, non-glazed, smooth or textured brick while lightly sanded, coated, slurry or sandbox brick is not suited for cleaning by sandblasting, unless there is no other choice open to the user.

Using the Right Equipment Should Make it Easy to Sandblast Mask

With the right equipment there should be no problem in sandblasting and it should be easy to sandblast designs onto glass. Then there is need to order or have a sandblast mask and this can also be done by customizing sandblasting masks from electronic files.

All that needs to be done here is to apply the mask to the glass surface and this is indeed the most labor-intensive part of the whole process because of the need to measure, place and burnish on each mask as well as having to completely cover the remaining portion of the glass, with heavy paper.

This is done in order to prevent any exposed area, which may even be on the inside, from getting scratched by the sand that is sure to fly around and so a good seal is required. Therefore, the only portion of the glass that can be visible is that part which needs to be frosted. A sandblast mask can be achieved in an enclosed box that will be able to catch all the sand and recycle it.

A steady stream of sand which is aimed at the glass should be done until the glass begins to frost white and this may not take much time. Finally, after the blasting has been done, the protective paper and the resist mask should be removed and a cycle in a dishwasher should complete the sandblast mask process.

Many professional people who use a sandblast mask regularly find that they often need to customize the set up file and this means that the material needs to be cut to finish size. This is done because of the need to eliminate unsightly cut lines from the edges of the material.

Also, for the sandblast mask material to adhere to the substrate in the most optimum manner some amount of coating primer paint may need to be applied and then allowed to dry, thoroughly. Sand the surface so that it will accept mask material in a better way. There is also need for the sandblast mask to be cut on a cutter similar to a vinyl cutter that is normally used and, in addition, the sandblast mask has to be weeded to provide for blasted areas, which are discarded and the areas that remain will be those that appear to be raised.

After all this has been done, the sandblast mask material needs to be applied to the substrate after which the sandblasting should be done. After this, the sandblast mask is removed and some primer coating is applied. The basic sandblast mask will have been achieved.