Safety critical technology for powder coating production lines!

Safety production is the top priority of powder coating enterprises, the cornerstone of ensuring the stable development of enterprises and social stability, and an important premise for

To ensure the safety of life, the most important thing is prevention

This article mainly explains how to strengthen safety design from the perspective of mechanical and electrical safety technology to eliminate the safety risks

High-speed premixer

The mixing propeller in the high-speed mixer runs at high speed under the drive of the cycloidal needle wheel reducer, and the running speed reaches 80r/min, and the crushing device can reach 2900r/min

If the operator is started by others when repairing and maintaining the equipment, serious injury or fatal danger

The solution is shown in Figure 1 to ensure full user safety

A limit safety interlock switch is set at the connection between the tank and the lid to protect the safety of

Add a mechanical safety shield at the bite between the sprocket of the cycloidal needle wheel reducer, the sprocket of the lower bearing housing of the mixer tank and the tangential moving parts to protect the operator from mechanical injuries

The seal between the tank and the can lid adopts a fast clamp locking device to ensure reliable locking and self-locking ability to ensure that the mixture does not overflow and does not leak, preventing the material from splashing danger
.

Safety warning signs are posted on safety shields, protective fences, and electrical installations to warn users of safety
.

The main engine, motor and electrical control box are equipped with electrical grounding protection devices, and the protection level is IP55, and the emergency stop switch
is installed on the panel of the electric control box.
Protects the operator from electric shock damage
.

Extruders

Extruders are an important critical piece of equipment
in the production of powder coatings.
The motor drives the gearbox to run at high speed, the gearbox is connected to the screw at high speed, and the connection part is easy to lead to mechanical safety hazards
such as winding and articulation.

And in the process of melting and blending extrusion, high temperature heating is required, and the external heat exchange water circulation device is easily caused by the risk of
high temperature burns.
If the motor and electrical control box lack electrical grounding protection device, it is easy to cause electric shock risk
.

The solution is shown in Figure 2 for safe
operation.

In the bite of the rotating parts of the opposite direction such as the screw, the upper part of the screw and the left and right sides of the screw are installed to protect the user from mechanical safety risks
such as high temperature burns and hinges.

Install guards at the connection of the gearbox and the screw barrel to protect the user from mechanical safety risks
such as entanglement and hinging.

The motor and the electrical control box are equipped with electrical grounding protection devices and are IP55 protection level
.
Install an emergency stop switch on the panel of the electrical control box to prevent electrical safety injuries
.

Tablet crusher

Tablet crusher set roller press molding, track sheet chain transmission and multiple groups of fan cooling, crushing and other functions in one, with the fuselage length, many functions, complex safety hazards and other characteristics
.

Therefore, we should pay attention to the safety protection problem of protecting the personal safety of the operator, and the solution is shown in Figure 3, which can fully ensure the safety of
the user.

Install a mechanical safety shield at the pressure roller, so that the gear of the cycloidal needle wheel reducer and the gear device of the pressure roller transmission are closed and protected, so as to protect the user from mechanical injuries
such as rolling and winding, entanglement, etc.

Mechanical safety shields are installed in the upper and lower left and right positions of the crushing roller to protect the user from mechanical injuries
such as crushing, crushing, winding, rolling, and hinging.

Protective covers are installed on both sides of the stainless steel chain plate of the tablet crusher to protect the user from mechanical injuries
such as scratches and windings during operation.

In terms of the electrical control of the crushing roller, the reverse function is designed to ensure safe use
by the user.

Emergency stop switches are installed on both sides of the frame of the tablet crusher, and once the safety risks related to crushing and crushing occur, the normal operation of the equipment can be urgently stopped to protect the personal safety
of the operator.

The motor and the electrical control box are equipped with electrical grounding protection devices and are IP55 protection level
.
Install an emergency stop switch on the panel of the electrical control box to prevent electrical safety injuries
.

Milling system

The milling system is a vital part to ensure the excellent quality of the finished powder coating, mainly composed of a mill, self-priming feeding device, cyclone separator, cyclone screen, off fan, dust collector, high-pressure induced fan, silencer and so on
.

Due to the high dust content in the production process, priority should be given to the design of explosion-proof functions, and the possible damage
caused by mechanical safety, electrical safety, and high noise to the user should be considered.

The solution is shown in Figure 4 to fully guarantee user safety
.

The main grinding is fully sealed to prevent dust leakage and ensure safe operation, and when the grinding lid is opened, the grinding disc and classifier automatically stop running
.

The rotating vibrating screen is fully sealed when working, preventing dust leakage and eliminating the winding caused by rotating parts
.
In danger of scratching and other hazards, when the rotary vibrating screen is opened, the rotating device automatically stops running
.

The filter bag in the dust box is made of anti-static material, which can reduce the generation of electrostatic charge and effectively prevent the explosion of static electricity when the dust content exceeds the
standard.

Install an explosion isolation valve between the cyclone separator and the dust box, when the dust content in the dust collector or pipeline exceeds the standard, the pressure is automatically removed, which can release the explosion air flow and eliminate the explosion hazard
.

In strict accordance with the national industry standard HG/T4595-2014 to design and manufacture the dust box explosion door, when the dust gas flow pressure of the dust collector reaches the set pressure of the discharge door, the air flow is released after automatic opening, so that the pressure is removed and the explosion hazard is
eliminated.

The self-priming feeder is equipped with protective devices to prevent human limbs from contacting the rotating parts to protect the user's personal safety and prevent mechanical injuries
such as involvement, winding, and hinging.

In the cyclone separator, dust box, pulse valve control device of the working platform to install the safety protection railing, and in the ladder and platform connection must have a safety locking device to protect the safety of the user and the installation, repair, maintenance of the safe
.

The motor and the electrical control box are grounded protection, and the protection level is IP55, and the emergency stop switch
is installed on the panel of the electric control box.

epilogue

In the design of the powder coating production line, we should comprehensively consider the measures to prevent mechanical, electrical, noise and other safety risks, and design powder coating production equipment that fully protects the personal safety of users, in order to promote the harmony of man and machine, help powder coating manufacturers to improve production efficiency, ensure the quality of powder coating products, and conform to the basic national policy
of safe production in China.