How to Choose Engineering Plastic & Rotomolded Cases | Price & MOQ Guide | Protective Case

1. What Problem Does This Category Solve

Each molding process sets a different performance envelope: injection for precision, rotomolding for toughness, blow molding for cost. kexinMaterials runs all three lines in one factory, so your rotomolded case gets the right process for its load, size and budget — not whatever a single-process shop happens to own.

Rotomolded or injection for your rotomolded case? A quick rule: above 800 mm per side or facing brutal handling, choose rotomolding (seamless, tear-resistant); for complex geometry and tight sealing on small-to-mid cases, choose injection. kexinMaterials provides free process selection reviews.

2. Reading the Key Specifications

Injection molding	High precision and finish for sealed mid/small cases
Rotational molding	Seamless, ultra-tough, for large transit cases
Blow molding	Lightweight, low cost, for tool boxes and packaging
Materials	Modified PP / ABS / LLDPE / glass-fiber reinforced
Tooling	In-house shop, steel and aluminum molds
Max part size	3-meter class via rotomolding

3. Process & Quality

The injection line owns precision and sealing, the rotomolding line owns size and toughness, and the blow molding line owns weight and cost — all sharing one tool shop and QC system, so one supplier covers a multi-process purchasing mix.

4. Top Questions Answered

Rotomolded vs injection molded — how to choose?

By size and duty: over 800 mm per side or rough handling favors rotomolding (seamless, high toughness); tight sealing and finish on smaller cases favors injection. We review your spec free of charge.

Tooling cost and timeline?

Depends on geometry: rotomolding aluminum molds run roughly 1/3–1/2 the cost of injection steel molds. Typical tooling takes 35–45 days including trials and first-article approval.

Can you run our specified compound?

Yes — custom modified formulas to your flame, ESD, UV and cold-impact targets, with third-party test reports.

How do ODM projects work?

You bring requirements and positioning; we handle industrial design, structure, prototyping, tooling and production. IP ownership is contracted, with NDA throughout.

What is the MOQ?

50 pcs on existing molds. Tooled projects are typically planned on annual volume with first orders from around 500 pcs, negotiable by model.

5. Getting a Quote

For retail and small orders visit www.beeaa.com. For wholesale and custom programs, send the case type, quantity and deadline — kexinMaterials replies with tiered quotes within 24 hours.

How to Choose: Engineering Plastic & Rotomolded Cases — A Manufacturer's Complete Guide