how to design and build a sandblasting room

Guide to Design and Build a Sandblasting Room

Sandblasting room is a kind of machine that can make various abrasives (silica sand, iron sand, steel shot, etc.) sprayed onto the surface of the workpiece with the help of air pressure. Rust, paint, scale, etc. According to the injection method, it is divided into self-priming and press-in type. Because the press-in type mixes the compressed air and the abrasive in the same container, the compressed air is fully utilized, and the air flow and sand volume are easy to adjust. It is suitable for large-area cleaning and has high efficiency. It is also widely used in pipes. Inner wall cleaning.

What is sandblasting?

A method of cleaning surfaces with high-speed moving grit. It can remove the oxide skin, grease, patent skin, etc. on the surface to obtain a more uniform surface quality. Subsequent procedures can be welding, oxidation, coating, surface chemical heat treatment, phosphating, etc. Sand blasting can generate residual compressive stress on the surface of the workpiece, make the surface quality of the workpiece uniform, and improve the fatigue strength of the workpiece. The effect of strengthening is worse than that of shot blasting, and the deformation of the workpiece is smaller than that of shot blasting.

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Features of a Sandblasting Booth/Sandblasting Room

The main function of the sandblasting room is to remove the rust, oxides, etc. on the surface of the workpiece by manually controlling the blasting gun to meet the requirements of painting or spraying.

At the same time, workers wear protective clothing, helmets, etc., which will not harm workers. Moreover, the sandblasting room is equipped with a dust collector system, which can achieve the state of no dust in the chamber body during work, and meet the environmental protection requirements of various places.

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How to design and build a sandblasting room?

As an investment product, how to design a suitable sandblasting room is a question worthy of attention. A suitable sandblasting room can not only help you save costs, but also create profits for you and help your business to a higher level.

Choosing a sandblasting room is a relatively open question, but in general, these criterions should always be followed:

1 The size of sandblasting room

You need an encloser place to put the sandblasting room. The size of the space depends on the size of object item that need to sandblasting. And when designing the size of the room, in addition to the size of the workpiece, you also need to consider the area required by the workers for sandblasting activities, the best blasting distance between the spray gun and the workpiece, etc. Generally, adding a distance of 1m around the workpiece is sufficient.

2 Material Handling system

The conveying method of the workpiece is also the focus of attention when designing the blasting room. How to put the items you need to blast into the blasting room, and handle them safely and conveniently, and then move the items out for storage, or proceed to the next process?

Most users will choose a trolley with rails for material handling and movement. This is the most economical and safe method. During sandblasting, the trolley is parked in the sandblasting room and the workpiece can be easily sandblasting.

If you are handling very large and heavy pieces of equipment like a pump station or engine block, with low volume, using a forklift could be the right solution for you.

Another method is to install an overhead conveyor on the roof of the blasting room, which allows the items to hang below them and moved in and out the blasting room.

Some users will choose the crane they already own, and design a movable roof controlled by cylinder, can let the crane into the blasting area with workpieces when the movable roof is opened.

3 Floor recovery system

Floor Recovery System is an efficient and inexpensive solution for recovering used abrasive with minimal effort from operator. System is suitable for large or small rooms, and offers flexibility in recovery floor layouts. Abrasive residues must be swept or shoveled into floor hopper to be recovered by system.

This recovery system can handle major light-to-heavy abrasives available on the market today, including heavy media such as aluminum oxide, steel shot, and steel grit. With media recovery capacity of over 2,000 lb. per hour and various floor hopper layouts, this system is designed for maximizing operator productivity while simplifying room cleaning after blasting operations.

4 Sandblasting Room Ventilation

During the sandblasting process, a large amount of dust will be generated, which will make the inside of room dusty. And the chemical nature of the dust will endanger health. Designing a suitable dust collector is needed.

There are three different airflow options to achieve this:

  1. Down-draft
  2. End-to-center
  3. Cross-draft

The working principle of the dust removal system in the room is: because the dust extraction fan extracts the gas and dust in the sandblasting room, the airflow outside the sandblasting room enters the sandblasting room through the coarse filter on the top of the sandblasting room, and then passes through the top of the sandblasting room. The uniform flow plate enters the sandblasting studio in the sandblasting room, forming a top-down airflow on the cross section of the sandblasting room, and the dust and dirt in the sandblasting room enter the dust extraction port with the airflow, and finally pass through the dust removal The pipeline enters the dust removal system, and the clean air is filtered by the dust removal system and discharged into the atmosphere. The dust and dirt are stored in the dust cylinder for regular cleaning.

How to calculate the air volume of dust collector in the sandblasting room?

Calculated by cross-sectional area. The method of calculating the cross-sectional area is to multiply the length by the width. It is important to explain here that the length and width are the areas that the ventilation can pass through. If there are other flowing air inlets besides the door, it should be added for rational calculation. :Air volume=cross-sectional area*wind speed*3600

5 ROI

It’s also important to consider the return on investment (ROI) when building a blast room facility. The amount of blasting done over a given period and the number of employees required both will influence blast room decision-making. Additionally, selecting the proper abrasive requires a thorough consideration of all of the parts that will be blasted. For example, mineral abrasives break down faster than steel grit abrasives but allow for greater flexibility for various blasting needs. Disposal costs also need to be factored in and can vary greatly depending on material and volume.

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As a professional sandblasting room manufacturer, we would like to give quotation to all customers as reference, so please contact us if you are interested in sand blasting room.

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