High-Quality Sensaball Mould | Custom Sensory Ball Mold Manufacturer

The sensaball mould is a specialized overmolding tool designed to encapsulate a rigid nylon core with a soft PU (polyurethane) outer layer. This two-material combination delivers the ideal balance of durability and tactile comfort for high-end sensory toys. We specialize in manufacturing custom sensory ball mold systems that ensure perfect adhesion between the nylon substrate and the PU overmold, meeting strict quality and safety standards.

Step 1: Product Design & Material Selection

Before manufacturing the sensaball mould, our engineering team analyzes the interaction between the nylon core and the PU overmold. Proper wall thickness and gate placement are critical to achieve strong chemical and mechanical bonding between the two materials.

• Core Material: Nylon (PA6 / PA66) – injection molded separately

• Overmold Material: Polyurethane (PU) – soft-touch, abrasion-resistant

• Process: Two-shot or insert overmolding

• Surface Finish: Smooth or textured PU exterior

  
  

Step 2: Mold Design & Engineering

The complexity of a custom sensory ball mold lies in the ejection system and core assembly. We designed a high-precision sensaball mould structure featuring a fully automatic ejection system to ensure cycle time efficiency. Our goal was to eliminate flash lines while maintaining perfect spherical geometry.

• Mold Base: Made by ourself

• Steel Type: P20H

• Runner: Cold runner

Step 3: Trial Run (T1) – Video Documentation

After manufacturing the sensual ball mould, we conducted a trial run (T1) on our 200-ton injection molding machine. This phase is critical to verify the venting and filling balance of the PU overmolding sensory ball mold.

Step 4: Sample Inspection & Quality Control

After the trial, samples are extracted and tested to ensure the PU overmolding meets specifications. Key quality checks include:

• Adhesion Test: Peel strength between nylon core and PU layer

• Dimensional Accuracy: ±0.05mm tolerance on final product

• Surface Quality: 100% inspection for bubbles, flash, or incomplete fill

• Hardness: Shore A 60–80 (customizable)

Step 5: Finished Mold Assembly

Once the samples were approved, we finalized the custom sensory ball mold. The mold components were hardened, polished, and assembled. We conducted a final water flow test and heater test to ensure the sensual ball mould is ready for high-volume production.

Step 6: Packaging & Logistics

The final step involved careful packaging to prevent rust and damage during transit. We ensured that the sensaball mould was put with anti-rust oil and wrapped with plastic film, finally put in a non-solid wooden case for international shipping.

• Package Type: Export standard non-solid wooden case

• Port of Loading: Ningbo/Shanghai/Yiwu

  
  

  

  
  

• Why Choose Us for Your PU Overmolding Sensory Ball Project?

• Specialized Expertise: We focus on PU overmolding for nylon core products – a technically demanding process.

• Full Transparency: As shown above, we document every step from design to delivery.

• Quality Assurance: Bond strength testing, dimensional inspection, and surface quality control.

• Global Standards: Our molds are compatible with leading injection molding machines (Arburg, Engel, Demag, etc.).

Contact Us

Looking for a reliable Sensaball mould manufacturer? Send us your 3D drawing and specifications today for a fast quote.