Shot blasting machine – this is equipment designed to clean metal from rust and various contaminants, working on the principle of throwing shot. You can clean metal perfectly with just two high-tech shot throwers; the size of such a unit will be small. Shot blasting must comply with GOST 31335-2006 and fulfill your technical requirements.
- What is shot blasting?
- Operating principle of walk-through models
- Operating principle of suspended installations
- Operating principle of drum shot blasting machines
- The operating principle of installations with a conveyor belt
- Operating principle of a pipe cleaning unit
- Shot blasting systems with closed shot cycle
- Conclusion
What is shot blasting?
In order to understand this issue, it is worth considering the operating principle of shot blasting machines . Through shot blasters, shot gets onto the working surface, which, when it collides with the material being processed, ensures its cleaning. Features of units of this type include the use of metal particles as an active cleaning component.
Shot blasting machines from the Russian manufacturer ZAVODRR are a unique product developed by Russian engineers. Shot blasting works using the technology of surface treatment by exposing them to small spherical particles. The energy-kinetic properties of abrasive agents applied under high pressure to a metal surface during processing make it possible to completely get rid of greasy deposits, scale and rust on the treated surface and remove corrosion pockets. The force and speed of supply of steel abrasive depends on the model of the throwers. To solve such problems, a shot blasting unit is used, which operates on the principle of mechanical supply of shot with special blades. As a result, the treated surface acquires the roughness necessary for subsequent operations. Microparticles of abrasive materials form a reliable protective layer on the metal surface being processed. A shot blaster for cleaning metal surfaces is necessary for processing a large number of products.
Brief technical specifications
| INSTALLATION TYPE TL-H | 0604 | 1004 | 1204 | 1605 | 2005 | 2506 | 3006 | 4006 |
| Max. working width of steel sheets (mm) | 600 | 1000 | 1250 | 1600 | 2000 | 2500 | 3000 | 4000 |
| Max. working width of profiles (mm) | 400 | 700 | 800 | 1200 | 1200 | 1800 | 2000 | 2000 |
| Max. working height of profiles (mm) | 400 | 400 | 400 | 500 | 500 | 600 | 600 | 600 |
| Number of turbines | 4 | 4 | 4 | 4 | 6 | 8 | 8 | 8 |
Operating principle of walk-through models
The walk-through shot blasting plant is distinguished by the presence of a system for transporting products for processing in the shot blasting chamber
. The transportation system consists of roller conveyors (roller tables) located at the inlet, outlet and inside the cleaning chamber. The installation is equipped with a shot recirculation system and a ventilation system.
Operating principle
A pass-through
shot blasting installation
involves passing a metal product through a chamber. Shot throwers are located along the edges of the chamber, which evenly process the part without requiring it to be turned or turned over. The advantage of pass-through type plants is their high productivity, which is perfect for large metal structures plants.
Safety precautions
The operation of the installation must be carried out by personnel who have undergone labor safety training, who are proficient in working with the required equipment, who have the appropriate qualifications and permission to work.
The camera must provide:
- complete isolation of the work area;
- preventing body parts from getting into gaps or parts of equipment;
- fences that prevent the shot from flying out of the chamber space;
- blocking doors, movable partitions, if it is possible to open or remove them without special devices;
- lighting sufficient to determine the location of the door during heavy dust conditions;
- eliminating the possibility of starting shot blasting equipment when the door to the chamber is not closed;
- interlocks preventing personnel from entering the chamber space during product processing.
The entry and exit points for workpieces from the workspace must be inaccessible to unauthorized persons. Personnel at the entrance and exit of the installation must wear personal protective equipment. The device, which uses manual shot blasting, is equipped with an observation window to monitor the work inside the chamber. The window must be impact-resistant and prevent shot from flying out, and the transparency of the glass must be maintained.
Operating principle of suspended installations
The suspended shot blasting unit is suitable for high-quality cleaning of rust and contaminants from the external surface of parts of any size. As a rule, the installation chamber is dead-end. Principle of operation
next: an electric motor with a hook engages the part and feeds the workpiece into
the shot blasting chamber
.
Suspended installations can have electric motors of different load capacities. The chamber is equipped with two shot blasters
, which are activated from the control panel.
The shot circulation has a closed cycle; the cleaning system is controlled automatically. The suspended principle
of operation is effective due to the fact that the part during cleaning is located in the center of the cleaning zone and rotates.
Suspended installations
are well suited for serial processing of parts, because the cycle of one cleaning does not exceed five minutes.
Purpose of the equipment
This equipment is designed to clean metal from rust, paint residues and other contaminants using the principle of shot throwing. This tool helps you perform the following operations:
- removes scale;
- cleans the surface from rust;
- you can create the desired roughness;
- make a matte surface;
- removes pockets of corrosion.
Using a shot blasting machine, you can extend the life of bridge supports and remove rust from structures that cannot be repaired.
Operating principle of drum shot blasting machines
The drum-type shot blasting machine has a horizontal drum that rotates due to rubber rollers. Due to the rotation of the drum, the workpieces are mixed and effectively cleaned by abrasive particles flying out under high pressure. The quality and speed of cleaning is also increased due to the fact that each processed part is an abrasive in relation to other products (the principle of a tumbling drum). Loading and unloading of parts in such installations is done manually. This is a fairly practical unit, which is most often used in the metallurgical industry for the final processing of the resulting alloys. Drum shot blasting units
purchased by small foundries to clean surfaces from scale and burns. Due to the simple principle of operation, the installations are the cheapest on the Russian market.
Advantages and disadvantages of application
There are a number of advantages to using shot blasting:
- If cast iron, steel or corundum shot is used, the surface is hardened.
- The increased strength of the abrasive material makes it possible to process surfaces made of homogeneous materials and alloys.
- A matte or rough surface is created if necessary.
- Effective cleaning of metal from scale, rust and other deposits.
If the installation is of an industrial type, then this significantly increases labor productivity at the enterprise. Among the disadvantages, it is worth noting that the installation does not allow cleaning in some hard-to-reach places, and the cleaning processes themselves have a low level of automation; the constant presence of an operator is required.
The operating principle of installations with a conveyor belt
Drum type shot blasting machine with conveyor belt
also uses
principle
.
The shot blasting chamber is equipped with a closed drum conveyor in the form of plates, which ensures uniform cleaning of parts. Loading and unloading of products in installations of this type can be done either manually or automatically. Most often, drum-type shot blasting machines
with a belt conveyor are used where there is a need to simultaneously clean a large number of small parts.
So basically it works
There are two main components involved: a hydraulic lift, which loads the workpieces into the chamber, and the belt drum itself, where cleaning occurs. During the operation, a container made of perforated rubber band rotates, allowing products to be processed from different sides. Accordingly, shot blasting using a drum-type installation with a conveyor belt allows you to obtain high-quality cleaned products at the output.
Operating principle of a pipe cleaning unit
Shot Blasting Machine for Pipe Cleaning
Suitable for internal and external processing of pipes of different diameters.
The basic principle of operation
is as follows: the pipe is fed to a roller conveyor, where it is given rotation.
If it is necessary to clean the inner surface, then the throwing head slides into the pipe along the guides. A shot blasting chamber is used for external pipe cleaning. The shot
is fired at an angle at high speed. High-quality cleaning of pipes from rust and scale, both inside and outside, occurs in just one pass. As a result of the treatment, the pipe's resistance to corrosion increases and the condition and quality of its surface improves.
Shot blasting systems with closed shot cycle
Shot blasting systems with closed shot cycle
They are characterized by a virtually waste-free
operating principle
.
After hitting the surface of the parts, the abrasive particles are picked up by the air flow and flow through the hose into the filtration unit, after which the grit
is cleaned and can be reused. Waste and dust are removed from the chamber using a special vacuum.
Russian-made shot blasting machines are distinguished by high quality and favorable prices. Each installation can be manufactured in accordance with individual customer requests within a period of 30 to 50 days. The installation warranty is 3 years from the start of operation.
ZAVODRR Russia offers to manufacture shot blasting machines
at factory prices with European quality.
