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Working Principle and Product Structure of Mortar Spraying Machine

Date:2026-07-23     Label:

Automatic Mortar Jetting Machine

Working Principle and Product Structure of Mortar Spraying Machine

A mortar spraying machine is a professional construction device specially designed for spraying mortar materials. It is mainly suitable for spraying mortar with particle sizes below 4–5 mm and is widely used in wall plastering, building construction, and renovation projects.

Compared with traditional manual plastering methods, modern automatic mortar jetting machines provide faster construction speed, more uniform spraying quality, and lower labor costs. Equipment such as the cement plaster spraying machine and sp10N spray machine has become an important solution for improving construction efficiency.

To better understand this advanced construction equipment, 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 feeding, conveying, pressurizing, and spraying.

First, the mixed mortar material is added into the feeding inlet of the machine either through an automatic mixing system or manual feeding. After passing through the vibrating screen, the mortar enters the machine hopper.

The screw conveyor then transports the mortar into the high-pressure chamber. Through the rotation of the high-pressure rotor and stator, the mortar is continuously compressed and delivered through the high-pressure pipeline.

When the mortar reaches the spray gun, compressed air is introduced into the spraying system. The strong airflow mixes with the mortar material, accelerates the spraying speed, and evenly sprays the mortar onto the target surface.

This working principle allows automatic mortar jetting machines to achieve stable pressure, continuous material delivery, and uniform spraying performance. It is especially suitable for cement plastering, wall coating, thermal insulation mortar spraying, and other construction applications.


2. Product Structure of Mortar Spraying Machine

A high-performance mortar spraying machine mainly consists of the following components:

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

Each part works together to ensure stable operation and efficient mortar spraying.


1. Driving System

The driving system is one of the key components of the mortar spraying machine.

It consists of an electric motor and a cycloidal reducer, which are installed at one end of the machine. The motor is directly connected to the reducer and operates parallel to the rotor and stator axis.

Main specifications:

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

The powerful driving system provides stable power output, ensuring continuous and efficient mortar transportation during operation.


2. Rotor and Stator Assembly

The rotor of the cement plaster spraying machine is manufactured from special alloy materials and treated through high-temperature quenching and tempering processes.

This manufacturing method improves:

  • Wear resistance
  • Mechanical strength
  • Service life

The stator is made of high-quality special rubber material, which provides better sealing performance and reduces maintenance requirements.

The optimized rotor and stator structure enables the automatic mortar jetting machines to maintain stable pressure and deliver consistent spraying results.


3. Air Pressure System

The air system is driven by a 2.2KW motor that powers the air compressor to generate high-pressure airflow.

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

The combination of high-pressure air and mortar creates a strong spraying force, allowing the material to be evenly applied to walls and other surfaces.

This system is one of the reasons why modern mortar spraying machines can achieve faster and more efficient construction compared with traditional methods.


4. Spraying System

The spraying system mainly includes:

  • Material delivery hose
  • Spray gun
  • Mortar pipe
  • Air pipe
  • Air valve

The delivery hose is made from wear-resistant slurry pipe to withstand continuous mortar transportation.

The spray gun is manufactured from durable polymer materials, while the mortar pipe, air pipe, and air valve are integrated into the spray gun structure.

This design improves spraying stability and makes operation easier for construction workers.


5. Electrical Control System

The electrical control system ensures safe and convenient operation of the mortar spraying machine.

The control box includes:

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

The system provides multiple safety protection functions, including:

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

These features improve equipment safety and reliability during long-term construction operations.


Advantages of Using Automatic Mortar Jetting Machines

Compared with traditional manual plastering, automatic mortar jetting machines provide several advantages:

Higher Construction Efficiency

The continuous spraying system greatly increases working speed and reduces project completion time.

Better Spraying Quality

Stable pressure and uniform material distribution help prevent common problems such as hollow areas, cracks, and uneven plaster surfaces.

Reduced Labor Costs

Automatic operation reduces dependence on skilled workers and lowers overall construction expenses.

Wide Application Range

The cement plaster spraying machine can be used for:

  • Interior and exterior wall plastering
  • Cement mortar spraying
  • Thermal insulation mortar application
  • Waterproof material spraying
  • Building renovation projects

Conclusion

The mortar spraying machine has become an essential piece of modern construction equipment because of its high efficiency, stable performance, and excellent spraying quality.

Through advanced screw conveying technology, high-pressure spraying systems, and intelligent control functions, automatic mortar jetting machines provide a faster and more economical solution for plastering projects.

Whether it is a professional construction project or a small renovation job, equipment such as the cement plaster spraying machine and sp10N spray machine can help improve productivity, reduce labor costs, and achieve better finishing results.

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