PP+30% Fiber Filler 4*1+2+2+4 Cavity Large Sprue Submarine NAK80 HRC37-43 Mold Steel Core and Cavity VDI 21 Texture Block Toy Mould

PP+30% Fiber Filler 4*1+2+2+4 Cavity Large Sprue Submarine NAK80 HRC37-43 Mold Steel Core and Cavity VDI 21 Texture Block Toy Mould

This custom injection mold is purpose-built for manufacturing PP+30% glass fiber reinforced block toy components, featuring a high-efficiency 4*1+2+2+4 hybrid multi-cavity configuration. Designed to produce 4 different block toy variants in a single cycle, it combines mass production efficiency with flexibility to support mixed part sets, ideal for educational building toys and construction-style play systems.
Constructed from high-quality NAK80 pre-hardened steel (HRC37-43), the mold uses a large sprue and submarine gate runner system optimized for glass-filled PP resin. The VDI 21 fine matte texture ensures a safe, kid-friendly surface, while precision engineering guarantees consistent interlocking performance across all molded blocks. Built for durability and low maintenance, this mold is the ideal solution for toy manufacturers seeking reliable, cost-effective production of high-quality building toys.

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Model:
24003
Brand:
YIXUN mold
Code:
8480419090

Product Description

Key Selling Points

✅ High-Efficiency Multi-Cavity Layout: 4*1+2+2+4 hybrid cavity design allows simultaneous molding of 4 different block toy parts in one cycle, maximizing production efficiency and reducing per-unit costs.

✅ Reinforced PP+30% GF Material Optimization: Mold tailored for glass fiber-filled PP, ensuring high dimensional stability, impact resistance, and structural durability for long-lasting toy blocks.

✅ Premium NAK80 Mold Steel (HRC37-43): Pre-hardened NAK80 tool steel offers excellent wear resistance, polishability, and toughness, supporting 800,000+ cycles with consistent precision.

✅ Large Sprue + Submarine Gate System: Robust large sprue ensures balanced melt flow for high-viscosity GF-reinforced resin; hidden submarine gates leave no visible marks, preserving the toy’s clean appearance.

✅ VDI 21 Fine Matte Texture: Uniform VDI 21 finish provides a child-safe, smooth non-slip surface, eliminating sharp edges and meeting toy safety standards.

✅ Precision Interlocking Design: Molded to tight tolerances, ensuring perfect fit and smooth assembly between compatible toy blocks, critical for interlocking building systems.

Product Overview

This custom injection mold is purpose-built for manufacturing PP+30% glass fiber reinforced block toy components, featuring a high-efficiency 4*1+2+2+4 hybrid multi-cavity configuration. Designed to produce 4 different block toy variants in a single cycle, it combines mass production efficiency with flexibility to support mixed part sets, ideal for educational building toys and construction-style play systems.
Constructed from high-quality NAK80 pre-hardened steel (HRC37-43), the mold uses a large sprue and submarine gate runner system optimized for glass-filled PP resin. The VDI 21 fine matte texture ensures a safe, kid-friendly surface, while precision engineering guarantees consistent interlocking performance across all molded blocks. Built for durability and low maintenance, this mold is the ideal solution for toy manufacturers seeking reliable, cost-effective production of high-quality building toys.

Detailed Specifications

Specification	Details
Mold Type	Injection Mold for Plastic Block Toy / Building Toy Parts
Cavity Configuration	4*1+2+2+4 Hybrid Multi-Cavity (4 different part variants per cycle)
Molded Material	PP+30% Glass Fiber Reinforced Polypropylene (PP+30% GF)
Mold Steel (Core & Cavity)	NAK80 Pre-Hardened Tool Steel
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)
Key Part Features	Tight tolerance interlocking design, impact-resistant, scratch-resistant, kid-safe surface
Applications	Educational building toys, construction-style interlocking blocks, children’s creative play sets
Production Lead Time	40-50 Working Days (Depends on part complexity and customer approval)
Quality Control	100% mold trial, dimensional/assembly inspection, surface finish verification
Certification	ISO 9001 Compliant Manufacturing

Core Advantages

1. Hybrid Multi-Cavity Design for Maximum Efficiency

The 4*1+2+2+4 cavity layout allows you to produce 4 different block toy variants in one injection cycle, drastically reducing setup time, material waste, and labor costs compared to separate molds for each part. This design is perfect for mixed-part toy sets, balancing high output with production flexibility.

2. NAK80 Steel: Durability for GF-Reinforced Toy Molding

NAK80 pre-hardened steel is ideal for this application:

Excellent wear resistance, critical for handling the abrasive nature of glass fiber-filled PP resin
Superior polishability, maintaining consistent VDI 21 texture across millions of cycles
Balanced toughness to resist cracking under repeated injection pressure, extending mold service 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 GF resin, preventing short shots in complex block geometries
Hidden submarine gates eliminate visible marks on the toy’s appearance surface, keeping parts brand-ready with no post-processing needed
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 the need for secondary finishing
Compliant with global toy safety standards, eliminating sharp edges and rough surfaces

5. Precision for Perfect 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 block toy components ideal for:

Educational STEM building toy 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 toys, with a focus on precision and safety compliance

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

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

✅ Full Customization Support: Adjust cavity layout, part shapes, and surface textures to match your unique toy designs

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

✅ Long-Term After-Sales Support: Comprehensive mold maintenance guidance and spare parts availability

FAQ

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

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 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 multi-cavity layout affect production efficiency?

A4: The 4*1+2+2+4 design allows you to produce 4 different block parts in one cycle, reducing cycle time, setup frequency, and material waste compared to running separate molds for each variant.

Core and Cavity VDI 21 Texture Block Toy Mould PP+30% Fiber Filler 4*1+2+2+4 Cavity steel NAK80 HRC37-43 Mold Steel injection mold