What should be noted when using the Two-color injection molding machine?

1. Equipment installation and commissioning

(1). Basic installation:

Ensure that the equipment is installed on a level, shockproof foundation to avoid vibration affecting the injection molding accuracy.
Reserve sufficient operating space for easy mold installation and maintenance.

(2). Power supply and hydraulic system:

Use a regulated power supply with voltage fluctuations within ±5% to avoid electrical system failures.
Check the hydraulic oil level and cleanliness and replace it regularly (recommended every 2000 hours or as required by the manufacturer).

(3). Cooling system:

Ensure that the cooling water flow and temperature are stable (generally 5-30°C) to prevent product deformation or mold damage due to uneven cooling.

2. Mold preparation and installation

(1). Mold compatibility:

Confirm that the mold is suitable for two-color injection molding. The runner design and ejection system of the two-color mold must match.
Check whether the hot runner system of the mold (if any) is working properly to avoid glue blockage or uneven temperature.

(2). Installation and alignment:

The two-color mold must be strictly aligned to ensure the repeatability of the rotary table or turntable (error ≤ 0.05mm).
After installation, manually test run to confirm that there is no risk of interference or collision.

(3). Preheating and maintenance:

The mold must be preheated to the recommended temperature (such as 80-120℃, depending on the material) to prevent cold mold from causing insufficient filling or stress cracking.
Regularly clean the mold parting surface and ejector pins, and spray rust inhibitor.

3. Precautions during production

Monitor key parameters:
Pay attention to barrel temperature, mold temperature, and injection pressure in real time. Abnormal fluctuations must be adjusted immediately. Use in-mold sensors (such as pressure and temperature sensors) to improve process stability.

Product Inspection:
First-part parts require a thorough inspection for bond strength, color distribution, and dimensional accuracy.
Perform regular tensile testing (such as peel testing at two-color joints) on samples.

Avoiding Common Defects:
Weak bond: Increase mold temperature or adjust material formulation.
Color difference or color mixing: Clean any residue from the barrel and ensure a thorough color change.
Flash or burrs: Check the mold for insufficient clamping force or wear.

4. Safety and Maintenance

Operational Safety:
Do not reach into the clamping area. Always disconnect the power supply and lock the machine during maintenance.
Protect hot parts (such as the nozzle and mold) to avoid burns.
Daily Maintenance:
Clean any residue from the hopper and nozzle daily to prevent material carbonization.
Check the lubrication system (such as guide rails and lead screws) weekly and use high-temperature grease.
Procedure for Long-Term Downtime:
Empty any plastic from the barrel to prevent oxidation and degradation. Apply anti-rust oil to the mold and close the cooling water line.

5. Common troubleshooting of two-color injection molding machine