XR Devices (AR/VR/MR)

XR Devices Elastollan 1195A Injection Molding with Yizumi UN-V5 200T

As design engineers pushing the boundaries of human-computer interaction, we operate in a domain of unforgiving constraints. The components for next-generation XR Devices (AR/VR/MR) are a masterclass in compromise: they must be lightweight for comfort, durable enough to withstand daily human contact, possess a premium haptic feel, and be manufacturable in complex, ergonomic geometries. This is where the engineering challenge truly begins. Materials that offer the requisite flexibility and tear strength are often notoriously difficult to process. They demand a level of manufacturing discipline that separates a successful product launch from a costly production nightmare plagued by defects and dimensional instability.

This technical brief addresses a specific, high-stakes manufacturing scenario: producing mission-critical components from BASF Elastollan 1195A, a high-performance thermoplastic polyurethane (TPU). This material is a frequent first choice for XR faceplates, cable strain reliefs, and protective housings due to its exceptional tear strength, abrasion resistance, and 95A Shore hardness, which provides a perfect balance of rigidity and tactile flex. However, its virtues are matched by its processing vices. Elastollan 1195A is intensely hygroscopic, meaning it readily absorbs atmospheric moisture. If not meticulously dried, this moisture turns to steam in the barrel, causing hydrolysis—a chemical breakdown of the polymer chains. The result is catastrophic: splay marks, silver streaks, and a drastic reduction in mechanical properties, rendering the part useless. Furthermore, it is a shear-sensitive material. Excessive injection speeds or poorly designed flow paths can literally tear the long-chain polymer molecules apart, permanently degrading the material's integrity.

At MechanoFab, we don't just mitigate these risks; we have engineered a production cell specifically to eliminate them. Our solution combines a rigorous, non-negotiable material handling protocol with the precision of a specific machine tool: the Yizumi UN-V5 200T. This isn't just Standard Injection Molding; it's a dialed-in, data-driven system designed to deliver net-shape, fully compliant Elastollan 1195A components directly from the mold, preserving every bit of the material's specified performance.

Engineering for Global Compliance: CE, FCC, RoHS, and UL

Manufacturing for a global market means compliance is not an afterthought; it's a foundational design requirement. Our process for molding Elastollan 1195A is architected to ensure your final product meets critical international standards.

• RoHS (Restriction of Hazardous Substances): This is the most direct and critical compliance pillar. Elastollan 1195A is an inherently RoHS-compliant material. Our role is to preserve that compliance. We achieve this through process purity. By leveraging the Yizumi UN-V5 200T's exceptionally rigid clamping unit, we produce parts with minimal to no flash. This creates a "net-shape" component, eliminating the need for secondary trimming or finishing operations where non-compliant tools or contaminants could be introduced. Our closed-loop material handling and mandatory drying protocols also prevent cross-contamination from other polymers, ensuring the final part is as pure as the raw pellets.

• CE & FCC (Electromagnetic Compatibility): For any electronic device, the mechanical enclosure is the first line of defense against electromagnetic interference (EMI) and radio-frequency interference (RFI). CE and FCC certifications test this rigorously. A poorly molded part with dimensional variance, warping, or internal stresses can create microscopic gaps in seams or misalignments with internal shielding components. These imperfections become unintentional antennas, causing the device to fail EMC/EMI testing. The precision of our Yizumi machine is paramount here. Its high-response servo-hydraulic system ensures consistent melt pressure and packing, while the rigid platen design prevents mold deflection. This results in parts with unparalleled dimensional repeatability, shot after shot. This consistency is not a "nice-to-have"; it is a core enabler of passing CE and FCC certification on the first attempt, saving you months of redesign and re-testing.

• UL (Underwriters Laboratories): UL certification often pertains to material safety, including flammability (UL 94) and long-term thermal stability. While the base material carries its own UL rating, improper processing can invalidate it. As mentioned, the shear-sensitive nature of Elastollan 1195A means that overly aggressive injection parameters can degrade the polymer. This degradation isn't just a mechanical issue; it can alter the material's chemical structure, potentially affecting its flammability characteristics and its ability to withstand long-term exposure to heat generated by the device's electronics. Our process control, guided by precise melt temperature monitoring and a carefully profiled injection velocity, ensures the polymer's molecular structure remains intact. We deliver a part that performs exactly as the material datasheet—and the UL certification—promises.

Core Process & Material Specification Deep-Dive

Success in molding a material like Elastollan 1195A is a function of respecting its properties and leveraging equipment that can control them. The table below outlines the critical parameters that define this manufacturing capability. This is the data that matters—the intersection of material science and machine dynamics. The Yizumi UN-V5 200T's specifications are not just numbers; they are the control levers we use to master this challenging TPU. The 2000 kN clamping force, combined with the 520 x 520 mm tie bar spacing, provides a robust platform for the complex, multi-cavity molds often used for XR components, ensuring absolute stability and flash-free production.

Cost Dynamics and Total Cost of Ownership (TCO)

The optimal production volume for this specific process is between 250 and 10,000 units. This range represents a critical economic sweet spot. It's beyond prototyping, justifying the investment in high-quality steel tooling, but below the ultra-high volumes where every fraction of a second in cycle time is scrutinized. In this mid-volume bracket, process reliability and defect rate have the most significant impact on the final part cost. This is where our factory advantage becomes a direct financial benefit to you.

Let's deconstruct the Total Cost of Ownership (TCO). A competing quote might appear lower on a per-part basis, but it often hides costs that emerge during production and assembly. Our advantage is built on cost avoidance.

1. Eliminating Material Waste: The hygroscopic nature of Elastollan 1195A is a financial landmine. Without our mandatory, temperature-and-time-controlled pre-drying protocol, a significant percentage of parts would exhibit splay and brittleness due to hydrolysis. This leads directly to scrap. A 10% scrap rate means you are paying for 10% more material and 10% more machine time than necessary. Our process neutralizes this risk, driving the defect rate toward zero and ensuring your material budget is spent on shippable parts, not rejected ones.

2. Preserving Material Integrity: The Yizumi UN-V5 200T's high-response servo-hydraulic system is the key to managing this shear-sensitive TPU. It allows us to create a multi-stage injection profile—injecting quickly in non-critical sections and slowing down through delicate features. This prevents the polymer degradation that destroys tear strength and leads to field failures. A field failure is the most expensive defect of all, costing not just replacement units and logistics, but also brand reputation. By delivering parts with the full, uncompromised strength of the base resin, we drastically lower your long-term warranty and replacement costs.

3. Zero-Cost Secondary Operations: The exceptional rigidity of the Yizumi's clamping unit is non-negotiable for complex XR geometries. It minimizes platen deflection under high injection pressure, which is the primary cause of mold parting-line separation and the resulting flash. Flash requires a manual secondary operation for trimming. This adds direct labor cost, introduces dimensional inconsistency, and creates a potential point of failure. Our ability to produce net-shape parts directly from the tool completely eliminates this entire cost center. The part that drops from the mold is the part that goes into your assembly, saving time, labor, and ensuring perfect tolerance every time.

By focusing on absolute process control, we transform a challenging material into a reliable production asset. The result is a lower TCO, faster time-to-market, and the engineering confidence that comes from knowing every part is dimensionally perfect and mechanically sound.

Conclusion: From Engineering Challenge to Production Reality

Molding Elastollan 1195A for the demanding XR Devices (AR/VR/MR) market is a test of a manufacturer's true capabilities. It requires more than just a machine; it requires a holistic system of material science, process engineering, and uncompromising quality control. At MechanoFab, we have built that system. We invite you to leverage our expertise to de-risk your production, accelerate your development cycle, and deliver a superior product.