Structural Steel Frame Zinc Alloy Electroplating Equipment Copper Nickel Chrome Plating Line

Zinc Alloy Electroplating Equipment Electroplating Machine

Plastic electroplating is widely used to improve the appearance, corrosion resistance, wear resistance, and functionality of plastic components. ABS and PP are commonly used electroplating plastics, with ABS accounting for a major share of applications.

ABS consists of acrylonitrile (A), butadiene (B), and styrene (S). During surface roughening, the butadiene component is selectively dissolved to create microscopic roughness, improving the adhesion of subsequent conductive and metal coatings.

For reliable electroplating performance, electroplating-grade ABS should be selected. ABS with approximately 15%–25% butadiene content is commonly used, such as ABS 300# from Japan. Non-electroplating-grade ABS may require stricter control of the roughening process to achieve sufficient surface activation and coating adhesion.

Zinc Alloy Electroplating Process Flow

Hanging → Wax Removal → Anodic & Cathodic Electrolytic Degreasing → Water Washing → Mild Etching → Water Washing → Pre-Dipping → Alkaline Copper Plating → Strike Copper Plating → Acid Copper Plating → Water Washing → Semi-Bright Nickel Plating → Bright Nickel Plating → Nickel Sealing → Pearl Nickel Plating → Chrome Plating → Recovery → Reduction → Water Washing → Hot Water Rinsing → Unloading → Drying

Equipment Overview

This automatic plating line is designed for stable and continuous electroplating production. The equipment combines a rigid steel framework, automatic transporter, PLC control, and variable-speed movement to provide accurate positioning and consistent transfer of workpieces between process tanks.

1. Main Frame
The main frame is fabricated from A3 structural steel. An epoxy protective coating is applied to the external surfaces to improve corrosion resistance. The exterior color can be customized according to the customer's requirements.

2. Structural Design
The supporting structure consists of fixed plates, vertical columns, operator walkways, flat wire, and horizontal adjustment bolts. The layout provides stable equipment support while allowing convenient access for operation, inspection, and maintenance.

3. Transporter and Drive System
The transporter incorporates motors, gear reducers, and dedicated mechanisms for horizontal and vertical jig movement. The drive system is designed for smooth operation, reliable positioning, easy maintenance, and long-term service.

• The horizontal travel mechanism uses imported geared brake motors to directly drive the traveling wheels.

• An induction-based deceleration and positioning system is used to improve transporter positioning accuracy.

• Emergency stop buttons are installed throughout the plating line to provide rapid braking in abnormal operating conditions.

• The jig lifting mechanism consists of a geared brake motor, coupling, and high-strength acid-resistant and aging-resistant belt for reliable vertical movement.

• Horizontal travel and vertical lifting speeds are controlled by the PLC and frequency converters.

• Three selectable speed levels—low, medium, and high—can be configured according to different operating requirements.

• Multi-stage speed control reduces starting and stopping inertia, helping minimize transporter swing and ensuring smooth movement and accurate positioning.

Specifications

Main Electrical Configuration

1. PLC Control
The PLC system uses Mitsubishi Electric components from Japan for reliable automatic control and sequence management.

2. Frequency Inverters
Mitsubishi Electric frequency converters are used to regulate transporter travel and lifting speeds according to the programmed process requirements.

3. Touchscreen Interface
The operator interface uses a Kunlun Tongtai touchscreen, providing an intuitive control interface for monitoring and parameter adjustment.

4. Sensors
Proximity switches and photoelectric sensors from Omron are used for position detection and movement control.

5. Electrical Components
Contactors and thermal overload relays are supplied by Omron to support reliable motor control and electrical protection.

6. Control Cabinet
The control cabinet is designed with an organized internal layout and protective construction suitable for the operating environment. Wiring is clearly arranged with identifiable wire numbers and component labels. English labels are provided on the operation panel for convenient operation and maintenance.

7. Automatic and Manual Modes
The system supports both automatic and manual operation. Under automatic mode, parameters such as workpiece residence time, transporter travel position, and lifting speed can be preset according to the plating process.

8. Program Protection and Memory
The control program incorporates interruption handling, power-failure memory, and recovery functions, helping operators manage unexpected stoppages and resume operation more efficiently.

9. Safety Protection
Emergency stop devices are distributed throughout the equipment to allow operators to quickly stop the system when an abnormal condition occurs, improving overall operational safety.

Zinc Alloy Electroplating Engineering Experience

Zinc alloy die-castings require careful surface preparation because the substrate can be sensitive to aggressive chemical treatment and may contain casting defects that affect coating adhesion and surface appearance.

For this reason, the plating line is designed around controlled pretreatment, copper strike and multi-layer plating processes. The equipment can be configured according to the zinc alloy material, workpiece geometry, required coating structure and production capacity.

During line engineering, our team considers workpiece loading, jig design, tank arrangement, transfer distance, process residence time, current requirements and production cycle time. These factors help achieve stable positioning and repeatable processing throughout the automatic plating sequence.

The system can be customized for decorative and functional zinc alloy plating applications, including copper, nickel and chrome finishing processes.

Quality Control

Each zinc alloy electroplating line is inspected and tested before shipment to verify mechanical, electrical and automation functions.

Our factory inspection includes:

• Main frame and tank structure inspection

• Horizontal and vertical transporter movement testing

• PLC and inverter control testing

• Sensor and positioning function testing

• Automatic and manual operation testing

• Emergency stop and safety function testing

• Control cabinet wiring and component labeling inspection

• Heating, filtration and auxiliary equipment function checks

• Trial operation of programmed process sequences

• Final inspection according to the approved technical configuration

The equipment is released for shipment only after the main mechanical, electrical and control functions have been checked.

Manufacturer Credentials

• Electroplating equipment manufacturer
• Surface finishing equipment engineering
• Automatic plating line design
• PLC automation integration
• Equipment manufacturing and assembly
• Installation and commissioning support
• After-sales technical service
• Customized plating line solutions

FAQ

1. What is zinc alloy electroplating equipment used for?
It is used to apply copper, nickel, chrome and other metal coatings to zinc alloy components for decorative, protective or functional surface finishing.

2. What plating processes can this line support?
The line can be configured for zinc alloy processes including copper, nickel and chrome plating according to the required coating system.

3. Can the plating line be customized?
Yes. Tank arrangement, transporter configuration, process sequence, loading capacity and control functions can be customized according to the production requirements.

4. Is the equipment fully automatic?
Yes. The system can operate automatically through PLC control and can also provide manual operation for commissioning and maintenance.

5. What is the maximum production cycle?
The fastest cycle can reach approximately 30 seconds per rack under suitable production conditions. Actual cycle time depends on workpiece size, loading method and process configuration.