Injection molding is the most common manufacturing process for protective cases. Molten plastic is injected into a steel mold under high pressure, cooled, and ejected as a finished part. Injection molding offers high precision, fast cycle times, and low per-unit cost at scale.
Process Steps
- Plastic resin (PP, ABS, PC) is fed into a heated barrel.
- Screw rotates and melts the plastic.
- Molten plastic is injected into a closed steel mold under high pressure (700-1,400 bar).
- Plastic cools and solidifies in the mold.
- Mold opens and the finished part is ejected.
Advantages
- High precision: ±0.05mm tolerance achievable.
- Fast cycle time: 30-120 seconds per part.
- Low unit cost at scale: Unit cost drops significantly above 1,000 pcs.
- Wide material choice: PP, ABS, PC, PC/ABS, PP+GF, and engineering plastics.
Limitations
- High tooling cost: $5,000-$50,000+ depending on part complexity.
- Long lead time for tooling: 30-60 days.
- Limited to parts that can be ejected from a two-part mold (no undercuts).
Frequently Asked Questions
What is Injection Molded Case?
Injection molding enables high-volume, precision case production with tight tolerances.
Does KeXinMaterials make Injection Molded Case?
Yes — KeXinMaterials is a source factory with 9 product lines, including models based on this process.
How do I get a quote for Injection Molded Case?
Submit the 5-step OEM form or email kexin@beeaa.com. Reply within 12 hours.
