Two-color injection molding machine: How to achieve efficient and precise production?

1. Working principle of two-color injection molding machine

Two-color injection molding machine is a special injection molding equipment, whose core function is to complete the injection molding of two different colors or materials of plastics in one production cycle. Compared with traditional single-color injection molding machines, two-color injection molding machines have two independent injection systems, which can achieve more complex product structures and richer visual effects.

The injection system is the core part of the two-color injection molding machine, usually composed of two independent injection units. The injection unit is responsible for injecting one material (usually as a base material), and then the injection unit is responsible for injecting the second material (usually as a covering layer or decorative layer). The two units can control the temperature, pressure and injection speed respectively to ensure the combination of the two materials.

The mold rotation system is another key technology of the two-color injection molding machine. After the injection and preliminary cooling of the material are completed, the mold will transfer the semi-finished product to the second injection position through a rotating mechanism (usually 180 degrees) for the injection of the second material. This design avoids deformation and contamination during product transfer, and improves production efficiency and product precision. The control system is responsible for coordinating the entire production process, accurately controlling key parameters such as injection timing, mold rotation, and temperature regulation.

2. The main role and advantages of two-color injection molding machine

The reason why two-color injection molding technology has received widespread attention and application is due to its unique process advantages——

• Improving product aesthetics and functionality

Two-color injection molding can produce colorful and layered plastic products at one time without the need for subsequent spraying or assembly processes. This not only improves the appearance and texture of the product, but also realizes functional zoning.

• Reduction of production costs

Traditional production methods require multiple devices or multiple processes to complete two-color products, and two-color injection molding machines can complete them at one time, saving labor, equipment and time costs. According to statistics, the use of two-color injection molding technology can reduce the overall production cost by about 30%-40%.

• Improve product consistency and precision

Since the entire production process is completed continuously in the same equipment, the errors caused by transfer and alignment in traditional methods are avoided, and the product dimensional stability and appearance consistency are greatly improved, which is suitable for electronic and medical products with high precision requirements.

• Environmental protection and energy saving advantages

Compared with traditional spraying process, two-color injection molding does not need to use solvent-based paint, which reduces VOC emissions; at the same time, integrated production also reduces energy consumption, which is in line with the green development trend of modern manufacturing industry.

3. Daily maintenance points of two-color injection molding machine

In order to ensure the long-term stable operation of the two-color injection molding machine and maintain a stable production state, scientific maintenance is essential-

Regular lubrication and maintenance:Check the lubrication condition of special moving parts every 500 working hours, use lubricating grease of specified types, avoid mixing different greases, and pay attention to the lubrication of the mold rotating mechanism, which is a key component of the two-color machine.

Hydraulic system maintenance: Regularly check the quality of hydraulic oil, replace hydraulic oil every 2000 hours or half a year, keep the oil temperature in the ideal working range of 35-55℃, avoid high temperature causing oil quality deterioration, regularly clean or replace the oil filter, and ensure the cleanliness of the hydraulic system.

Electrical system inspection: Regularly check whether the wiring terminals are loose once a month, especially the line connection of the moving parts, regularly clean the dust of the electric control box, maintain good heat dissipation, back up important parameters, and prevent data loss from affecting production.