Gas-Assisted Injection Molding Toy Building Block Hollow Thick Wall Plastic Interlocking Brick with Smooth Surface No Sink Mark Molding

This hollow interlocking toy building block is manufactured via advanced gas-assisted injection molding technology. Designed with thick-wall geometry, the part achieves a flawless smooth surface without sink marks, which is a common defect for thick plastic components. The hollow structure keeps the block lightweight while retaining excellent structural rigidity, ensuring stable stacking and tight interlocking performance. It is a perfect component for kids educational construction toys, suitable for mass production and compliant with global toy safety requirements.

Ky Features

✅ Gas-Assisted Molding Process: Eliminates sink marks, dents and surface shrinkage on thick-wall sections. Hollow design reduces raw material consumption and cuts product weight. ✅ Premium Surface Quality: Smooth, uniform plastic surface with no gas traces, ideal for high-grade toy products. ✅ Reliable Dimensional Stability: Strict tolerance control guarantees consistent size across batches. Blocks can interlock, stack and separate smoothly. ✅ Lightweight & High Stiffness: Hollow internal structure maintains mechanical strength while reducing overall weight, safer for children to handle. ✅ Customization Available: Support custom size, color, surface texture, logo emboss/deboss and different material options such as PP and ABS. ✅ Toy Safety Compliance: Finished blocks can meet CE, RoHS and REACH standards, ready for worldwide toy market sales.

Technical Specifications

• Product Name: Hollow Interlocking Toy Building Block

• Molding Process: Gas-Assisted Injection Molding

• Structure: Thick wall, hollow inside

• Common Raw Material: PP / ABS

• Characteristic: No sink mark, smooth surface, lightweight & high rigidity

• Application: Kids educational stacking & construction toy

• Custom Service: Size, color, logo and material customization

Why Choose This Gas-Assisted Building Block

Traditional injection molding often suffers from sink marks on thick-wall toy blocks, which ruins appearance and product quality. Our gas-assisted molding solution solves this pain point perfectly. We can produce these hollow blocks with less plastic material and shorten molding cycle time, bringing down your total production cost. Every finished piece will go through dimension and appearance inspection before delivery. Whether you need sample testing or large volume bulk orders, we can support your toy project.

Our Service

1. Gas-assisted molding technical consultation & feasibility evaluation

2. Prototype samples for your testing

3. Mass production of hollow plastic toy blocks

4. Custom color, dimension and logo service

5. Product compliance document support

Send us your requirements to get samples and quotation for gas-assisted hollow toy building blocks!