PP+30% Fiber Filler 6*1+2+2 Cavity Large Sprue Sub Gate Mold Runner NAK80 HRC37-43 Steel Cav and Core VDI 21 Mold Finish Building Blocks Mould

PP+30% Fiber Filler 6*1+2+2 Cavity Large Sprue Sub Gate Mold Runner NAK80 HRC37-43 Steel Cav and Core VDI 21 Mold Finish Building Blocks Mould

This custom injection mold is purpose-built for manufacturing PP+30% glass fiber reinforced building blocks, featuring a practical 6*1+2+2 hybrid cavity configuration. Designed to produce multiple different toy brick components in a single cycle, it combines high-volume production efficiency with the flexibility to support varied product lines.

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Model:
24001
Brand:
YIXUN mold
Code:
8480419090

Product Description

Key Selling Points

✅ Multi-Cavity High-Efficiency Design: 6*1+2+2 hybrid cavity layout balances production output and flexibility, enabling simultaneous molding of 3 different building block parts in one cycle for cost-effective mass production.

✅ PP+30% GF Reinforced Material Optimization: Mold engineered for glass fiber-reinforced PP, ensuring high dimensional stability, impact resistance, and wear resistance for durable toy bricks.

✅ NAK80 HRC37-43 Pre-Hardened Steel: Premium NAK80 tool steel offers excellent polishability, wear resistance, and toughness, supporting long cycle life with consistent precision for toy molds.

✅ Large Sprue + Sub Gate Runner System: Robust large sprue ensures balanced melt flow across all cavities, while hidden submarine gates leave minimal marks, preserving clean toy block appearance.

✅ VDI 21 Standard Mold Finish: Fine VDI 21 matte texture provides uniform, kid-safe surface quality, eliminating sharp edges and ensuring a premium feel for building blocks.

✅ Custom Building Block Compatibility: Precision-molded to meet tight tolerance requirements for interlocking toy bricks, ensuring perfect fit, smooth assembly, and compatibility with standard block systems.

Product Overview

This custom injection mold is purpose-built for manufacturing PP+30% glass fiber reinforced building blocks, featuring a practical 6*1+2+2 hybrid cavity configuration. Designed to produce multiple different toy brick components in a single cycle, it combines high-volume production efficiency with the flexibility to support varied product lines.

Constructed from high-quality NAK80 pre-hardened steel (HRC37-43), the mold features a large sprue and submarine gate runner system optimized for glass-filled PP resin. The VDI 21 textured finish ensures a smooth, child-safe surface, while the mold’s precision engineering guarantees consistent interlocking performance across all molded blocks. Built for durability and low maintenance, this mold is ideal for toy manufacturers seeking reliable, cost-effective production of high-quality building block sets.

Detailed Specifications

Specification	Details
Mold Type	Injection Mold for Plastic Building Blocks / Toy Bricks
Cavity Configuration	6*1+2+2 Hybrid Multi-Cavity (Simultaneous molding of 3 part variants)
Molded Material	PP+30% Glass Fiber Reinforced Polypropylene (PP+30% GF)
Mold Steel (Cav & Core)	NAK80 Pre-Hardened Tool Steel
Hardness	HRC 37-43
Runner & Gate System	Large Sprue + Submarine Gate Runner System
Surface Finish	VDI 21 Fine Matte Texture (Child-Safe, Uniform Surface)
Mold Life Expectancy	800,000+ Cycles (Under Standard Production & Maintenance)
Part Features	Tight tolerance interlocking design, high impact resistance, scratch-resistant surface
Application	Educational toy building blocks, compatible with standard interlocking systems
Lead Time	40-50 Working Days (Depends on part complexity and approval timelines)
Quality Control	100% Mold Trial, Dimensional & Assembly Inspection, Surface Finish Verification
Certification	ISO 9001 Compliant Manufacturing

Cav and Core VDI 21 Mold Finish Building Blocks Mould

Core Advantages

1. Hybrid Multi-Cavity Design for Production Efficiency

The 6*1+2+2 cavity layout is tailored for toy block production, allowing you to mold three different part variants in a single cycle. This design reduces setup time, optimizes material usage, and lowers per-unit production costs while maintaining consistent quality across all parts. It’s ideal for small-to-medium batch production of mixed block sets.

2. NAK80 Steel: Durability for Toy Mold Applications

NAK80 is a premium pre-hardened tool steel, ideal for toy molds:

Excellent polishability, supporting consistent VDI 21 texture across millions of cycles
High wear resistance, critical for glass-filled PP resin that can accelerate mold abrasion
Balanced toughness to resist cracking under repeated injection pressure, ensuring long mold life

3. Optimized Runner System for Glass-Filled PP

The large sprue and submarine gate system addresses the unique challenges of PP+30% GF molding:

Enlarged sprue ensures sufficient melt flow for high-viscosity glass-filled resin, preventing short shots in complex block geometries
Hidden submarine gates eliminate visible marks on the toy’s appearance surface, maintaining clean, brand-ready parts
Balanced runner design ensures uniform filling across all cavities, minimizing warpage and dimensional variation

4. VDI 21 Texture: Child-Safe, Premium Surface Quality

The VDI 21 fine matte finish is perfectly suited for toy applications:

Provides a smooth, non-slip surface that’s gentle on children’s hands
Uniform texture hides minor molding marks, reducing post-processing needs
Compliant with toy safety standards, eliminating sharp edges and rough surfaces

5. Precision for Building Block Interlocking Performance

Every aspect of the mold is engineered to meet the tight tolerances required for interlocking toy blocks:

Precise cavity dimensions ensure consistent stud and tube geometry for smooth assembly
Optimized cooling and shrinkage control prevents warpage, maintaining the block’s structural integrity
Mold design accounts for glass fiber orientation, ensuring uniform strength and dimensional stability in the final part

Applications

This mold produces PP+30% GF building blocks ideal for:

Educational STEM toy building sets
Construction-style interlocking brick systems
Children’s creative play and puzzle toys
Durable outdoor play building blocks
Custom toy block components for licensed product lines

Why Choose Us as Your Direct Mold Maker?

✅ Toy Mold Specialists: Extensive experience designing and manufacturing molds for interlocking building blocks, with a focus on precision and safety compliance

✅ Hybrid Cavity Expertise: Proven track record of multi-cavity mold design for simultaneous molding of different part variants

✅ Child-Safe Quality Assurance: Molded parts meet toy safety standards, with smooth finishes and no sharp edges

✅ Full Customization: Support for custom block shapes, sizes, and color-matched resin formulations

✅ Mold Trial & Validation: In-house mold trials with sample parts to verify fit, finish, and assembly performance before mass production

✅ Long-Term Support: Comprehensive after-sales service including mold maintenance guidance and spare parts availability

FAQ

Q1: Why use PP+30% GF for building blocks?

A1: Glass fiber-reinforced PP offers superior impact resistance, dimensional stability, and durability compared to standard PP, making it ideal for long-lasting, kid-safe building blocks that resist warping and breakage.

Q2: What are the benefits of the submarine gate system?

A2: Hidden submarine gates eliminate visible marks on the toy’s surface, preserving the clean, brand-ready appearance of the blocks, while also simplifying post-processing and reducing labor costs.

Q3: Can the VDI 21 texture be modified?

A3: Yes, we can adjust the surface finish to other VDI/ SPI standards (e.g., higher gloss or coarser textures) based on your design requirements.

Q4: How does the hybrid multi-cavity design affect production efficiency?

A4: The 6*1+2+2 layout allows you to produce three different block parts in one cycle, reducing cycle time, setup frequency, and material waste compared to running separate molds for each variant.

Building Blocks Mould Cav and Core VDI 21 Mold Finish Building Blocks Mould PP+30% Fiber Filler 6*1+2+2 Cavity molding