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Working Principle and Product Structure of Mortar Spraying Machine

Date:2026-07-12     Label:

Automatic Mortar Jetting Machines

Working Principle and Product Structure of Mortar Spraying Machine

A mortar spraying machine is a professional spraying device specially designed for mortar spraying applications. It is mainly used for spraying mortar materials with particle sizes below 4–5 mm. Compared with traditional manual plastering methods, modern automatic mortar jetting machines can improve construction efficiency, reduce labor costs, and provide more uniform spraying results.

With the development of construction automation, equipment such as the cement plaster spraying machine and sp10N spray machine has become increasingly popular in wall plastering, building renovation, and large-scale construction projects.

This article will introduce the working principle and product structure of a mortar spraying machine in detail.


1. Working Principle of Mortar Spraying Machine

The working process of a mortar spraying machine mainly includes material feeding, conveying, pressurizing, and spraying.

First, the mixed mortar material is fed into the mixing and distribution inlet manually or through an automatic feeding system. After passing through the vibrating screen, the mortar enters the hopper of the spraying machine.

Inside the machine, the screw conveyor transports the mortar into the high-pressure chamber. Through the rotation of the rotor and stator, the mortar is continuously pressurized and pushed through the delivery pipeline.

When the high-pressure mortar reaches the spray gun, compressed air is introduced through the air system. The airflow accelerates the mortar particles and sprays them evenly onto the working surface.

This spraying method allows the automatic mortar jetting machines to achieve stable pressure, uniform coating thickness, and strong bonding performance. It is widely used for cement plaster spraying, wall finishing, thermal insulation mortar spraying, and other construction applications.


2. Product Structure of Mortar Spraying Machine

A high-speed mortar spraying machine mainly consists of several important components, including:

  • Driving system
  • Rotor and stator assembly
  • Air pressure system
  • Spraying system
  • Electrical control system

Each component plays an important role in ensuring efficient and stable machine operation.


1. Driving System

The driving system of the mortar spraying machine is composed of an electric motor and a cycloidal reducer. The motor is installed directly on the reducer and connected with the rotor and stator system.

Typical specifications include:

  • Motor model: Y132S-4-5.5KW
  • Voltage: 380V
  • Speed: 1440 RPM
  • Reducer model: BX1-4
  • Speed ratio: 1:9

The powerful driving system provides stable power output, allowing the machine to continuously spray mortar during long working periods.


2. Rotor and Stator Assembly

The rotor of the cement plaster spraying machine is manufactured using special alloy materials. After high-temperature quenching and tempering treatment, the rotor obtains excellent hardness and wear resistance.

The stator is made of high-quality special rubber material, which improves sealing performance and reduces maintenance frequency.

This design helps the automatic mortar jetting machines maintain stable spraying pressure and extend the service life of core components.


3. Air Pressure System

The air system is powered by a 2.2KW motor-driven air compressor, which generates high-pressure airflow.

The compressed air passes through the safety valve and pressure-limiting valve before being supplied to the spray gun.

The airflow combines with the mortar slurry inside the spray gun, allowing the material to be sprayed smoothly and evenly onto walls or other surfaces.


4. Injection and Spraying System

The spraying system mainly consists of:

  • Delivery hose
  • Spray gun
  • Mortar pipe
  • Air pipe
  • Air valve

The feeding hose is made from wear-resistant slurry pipe, while the spray gun uses durable polymer materials.

The optimized spraying structure enables the sp10N spray machine and similar equipment to achieve efficient material delivery and high-quality surface finishing.


5. Electrical Control System

The electrical control system is designed to ensure safe and convenient operation.

The control box includes:

  • Leakage protection switch
  • AC contactor
  • Thermal relay
  • Start and stop buttons

The system provides multiple protection functions, including:

  • Leakage protection
  • Over-current protection
  • Short-circuit protection

These safety features make the mortar spraying machine easier and safer to operate on construction sites.


Advantages of Using Automatic Mortar Jetting Machines

Compared with traditional manual plastering, automatic mortar jetting machines offer many advantages:

High Construction Efficiency

The machine can continuously spray mortar, greatly improving working speed and reducing project time.

Uniform Spraying Quality

The stable pressure system ensures consistent mortar thickness and better wall surface quality.

Labor Cost Reduction

Automatic operation reduces dependence on manual workers and improves productivity.

Wide Application Range

The cement plaster spraying machine can be used for:

  • Interior wall plastering
  • Exterior wall spraying
  • Cement mortar spraying
  • Thermal insulation mortar
  • Waterproof coating
  • Building renovation projects

Conclusion

The mortar spraying machine has become an important piece of equipment in modern construction due to its high efficiency, stable performance, and excellent spraying quality.

Through advanced screw conveying technology, high-pressure spraying systems, and automatic operation, automatic mortar jetting machines can significantly improve plastering efficiency while reducing labor costs.

Whether for professional contractors or large construction projects, equipment such as the cement plaster spraying machine and sp10N spray machine provides a reliable solution for faster and higher-quality mortar spraying operations.

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