Advanced Gas-Assisted Injection Molded Building Blocks Lightweight Hollow Core with Sink-Free Surface for Kids Educational Toys

Elevate your creative play with our high-precision square building bricks, expertly crafted using Gas-Assisted Injection Molding (GAIM) technology. Each brick features a clean, uniform cylindrical through-hole design, ensuring seamless compatibility and stable assembly for endless building possibilities. Made from durable, high-quality engineering plastic, these bricks deliver exceptional strength while maintaining a lightweight, smooth finish that is safe and enjoyable for creators of all ages.
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  • yixun

  • yixunmold

Elevate your creative play with our high-precision square building bricks, expertly crafted using Gas-Assisted Injection Molding (GAIM) technology. Each brick features a clean, uniform cylindrical through-hole design, ensuring seamless compatibility and stable assembly for endless building possibilities. Made from durable, high-quality engineering plastic, these bricks deliver exceptional strength while maintaining a lightweight, smooth finish that is safe and enjoyable for creators of all ages.

Key Advantages of Gas-Assisted Injection Molding

Our GAIM manufacturing process sets these bricks apart from conventional injection-molded products, offering unmatched quality and performance:
  • Zero Sink Marks & Warpage: The gas-assisted internal pressure compensation eliminates surface depressions and deformation, ensuring a flawless, smooth surface every time 

  • Enhanced Structural Integrity: Precise gas control creates consistent wall thickness, making the bricks rigid yet lightweight, resistant to breakage during repeated assembly

  • Eco-Friendly & Cost-Efficient: Reduced material waste (up to 30% less resin usage) compared to traditional molding, without compromising durability

  • Faster Cooling & Production: Optimized cycle times mean consistent quality with rapid production, ensuring reliable stock availability for bulk orders

Product Specifications

Parameter Detail
Material High-grade engineering plastic (food-contact safe, non-toxic)
Process Advanced Gas-Assisted Injection Molding (GAIM)
Design Standard square block with precision through-hole
Feature Interlocking compatibility, smooth edge finish
Color Customizable (available in natural white as standard)
Application Educational building sets, creative DIY projects, component assembly

Why Choose Our Building Bricks?

  1. Superior Precision: GAIM technology guarantees dimensional accuracy, ensuring perfect alignment and tight connections every time you build

  2. Durable Construction: Resistant to wear, impact, and fading, designed for long-lasting use in both casual play and professional projects

  3. Versatile Application: Ideal for educational STEM activities, creative building sets, custom component manufacturing, and more

  4. Customization Ready: We offer OEM/ODM services to tailor brick size, hole specifications, and color to your specific project needs

Quality Assurance

Each brick undergoes strict quality inspection throughout the GAIM production process:
  • Dimensional accuracy verification (±0.05mm tolerance)

  • Surface finish and defect inspection (no bubbles, cracks, or sink marks)

  • Structural strength testing to ensure reliable assembly

  • Compliance with international toy safety standards (EN71, ASTM)

OEM & ODM Services

We specialize in custom plastic component manufacturing via GAIM technology. Whether you need standard building bricks or specialized parts, our expert team can support:
  • Custom size and hole specification development

  • Color matching with Pantone codes

  • Logo engraving and surface customization

  • Bulk production for commercial and industrial applications


Injection Molded Building Blocks


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Yixun is the China first generation mold maker, specialize in mold and moulding, provide one-stop plastic manufacturing service, feature in building medical and healthcare device tooling.
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