The injection molded PP handle food box and its insert lid present several key technical challenges. Here are the primary concerns:

1. High Clarity PP with MFI 30

• Challenge: Achieving high clarity in PP with an MFI of 30.
• Solution: Ensure precise control of molding parameters. Maintain consistent temperatures and pressures.

2. Cycle Time Management

• Challenge: Cycle time for the box is 18 seconds, while the lid is 16 seconds.
• Solution: Optimize cooling channels and use efficient mold designs to reduce cycle times.

3. Pin-Gate Hot Runners

• Challenge: Properly balancing the pin-gate hot runner system in 4-cavity molds.
• Solution: Regularly check for uniform flow distribution. Maintain hot runner system to prevent clogging.

4. High Clarity and Surface Finish

• Challenge: Maintaining high clarity and surface finish in the handle box.
• Solution: Use polished mold surfaces. Ensure proper venting to avoid air traps.

5. Solid Colored PP-H Lid

• Challenge: Ensuring uniform color distribution in the solid colored PP-H lid.
• Solution: Use consistent colorant distribution and proper mixing.

6. Mold Wear and Maintenance

• Challenge: High cycle times increase wear on molds.
• Solution: Schedule regular maintenance. Use high-quality steel for molds.

7. Ejection System

• Challenge: Efficient ejection of the handle box without causing defects.
• Solution: Use a well-designed ejection system. Ensure smooth mold release.

By addressing these technical difficulties, manufacturers can ensure high-quality production of the polypropylene handle food box and its insert lid.

		Item and Finish Target
1	Resin Type	PP-H
2	Finish Requirement	Full and uniform filling, dimensions meet specifications, structure intact without cracks, good surface without scratches
3	Finish Weight	62 grams for can, 12 grams for lid
		Mold Scenario
4	Structure	4-cavity, hot runner, pin gate
5	Steel & Process	S50C standard mold base, 2344 core and slider, nitriding treatment
		Molding
6	Machine Clamping force	280 KN
	Cycle Time	16-18 seconds