Action Cameras & Gimbals

Action Cameras & Gimbals Elastollan 1195A Standard Injection Molding with LK Forza 550T

As an engineer designing for the extreme edge, you live and breathe trade-offs. Your product, a next-generation action camera or gimbal, will be dropped, submerged, frozen, and baked. It will be trusted to capture once-in-a-lifetime moments in the harshest conditions imaginable. Failure is not an option, and the first line of defense is always the physical enclosure. This is where the world of material science and manufacturing process control becomes less of a supply chain detail and more of a mission-critical design parameter. For the demanding world of Action Cameras & Gimbals, the choice of housing material and its manufacturing process dictates whether your device is a rugged tool or a fragile toy.

The challenge is immense. You need a material with exceptional impact absorption, abrasion resistance, and chemical resilience. It must form intricate geometries for buttons, ports, and lens mounts while maintaining dimensional stability across a wide temperature range. Critically, it must enable a perfect, unbreachable seal against water and dust ingress. This is the domain of high-performance thermoplastic polyurethanes (TPUs), and specifically, materials like BASF Elastollan 1195A. With its 95A Shore hardness, it offers the perfect balance of rigidity for structural integrity and flexibility for impact damping. However, specifying the material is only half the battle. The other half—the part that keeps manufacturing engineers up at night—is molding it. Elastollan 1195A is notoriously difficult to process. Its high melt viscosity demands extreme injection pressures, and its hygroscopic nature means any moisture in the pellets will turn to steam in the barrel, causing splay, voids, and catastrophic surface imperfections. This is where a generic Standard Injection Molding approach fails, and a specialized, process-controlled strategy becomes paramount.

Forging Invincibility: Meeting IP68 and MIL-STD-810G Head-On

Compliance isn't a checkbox; it's a design philosophy proven through rigorous testing. For action cameras, IP68 and MIL-STD-810G are the gold standards, and our manufacturing process is engineered from the ground up to meet them.

IP68 (Ingress Protection): The Science of the Seal

An IP68 rating signifies total protection against dust and the ability to withstand continuous immersion in water under specified pressure. For a molded housing, this integrity lives or dies on the quality of its sealing surfaces—typically a groove for an O-ring or a flat face for a gasket. With Elastollan 1195A, achieving a microscopically perfect surface is a monumental challenge. The high injection pressures required to fill the mold can lead to flash, while insufficient pressure or temperature fluctuations can cause sink marks or short shots. Any of these defects, even on a micron scale, can create a leak path.

This is where the precision of our chosen machine, the LK Forza 550T, becomes our core advantage. Its advanced servo-hydraulic system provides closed-loop control over injection pressure, velocity, and holding pressure. We can profile the injection stage with surgical precision, delivering a high-pressure blast to fill the part, then transitioning seamlessly to a precisely calculated holding pressure. This prevents over-packing and flash while ensuring every cavity detail is perfectly replicated, eliminating sinks and voids on critical sealing faces. The result is a part that is inherently waterproof, not one that hopes to be.

MIL-STD-810G (Shock & Drop): Engineering for Impact

The MIL-STD-810G standard, specifically Method 516.6 for shock, simulates the brutal reality of a device being dropped. The housing must absorb and dissipate impact energy without fracturing or permanently deforming. Elastollan 1195A's inherent toughness is ideal for this, but only if the part is molded without internal stresses. Improper cooling rates, non-uniform melt temperatures, or poorly placed gates can create weak points and stress concentrations within the part. When the device is dropped, these are the points where a crack will initiate.

Our process control mitigates this risk. By ensuring absolute thermal stability in the mold and barrel, and by using sophisticated mold-flow simulation to engineer gate locations and runner systems, we create a uniform melt front. The immense rigidity of the LK Forza 550T's two-platen clamping unit prevents mold deflection even under the 1885 bar of injection pressure needed for this material. This platen parallelism ensures that the clamping force is distributed evenly, preventing part thickness variations and the associated internal stresses. Every part that comes out of our mold has the full, isotropic strength potential of the raw polymer, ready to withstand the repeated shocks and drops demanded by MIL-STD-810G.

CE/FCC Compliance: The Foundation of Electronic Reliability

While CE and FCC standards primarily govern electromagnetic compatibility and safety, the mechanical enclosure plays a vital role. A dimensionally accurate and stable housing ensures that PCBs are securely mounted, preventing vibration-induced failures. It guarantees that internal shielding components make proper contact and that antenna placements are not compromised. By producing net-shape parts with high repeatability, we eliminate the geometric variability that can plague less-controlled processes, providing a stable and predictable foundation for your entire electronics assembly and certification process.

Core Process & Equipment Parameters

To achieve this level of precision, every variable is monitored and controlled. The synergy between the material's properties and the machine's capabilities is what makes this solution possible. Below is a top-level summary of the key parameters governing this manufacturing cell.

Cost Dynamics: The TCO Advantage of Net-Shape Molding

For production volumes in the sweet spot of 1,000 to 50,000 units, the Total Cost of Ownership (TCO) is a far more critical metric than simple piece-part price. This is where our specialized approach delivers a decisive economic advantage. The core challenge remains: tackling the high melt viscosity and hygroscopic nature of Elastollan 1195A requires absolute process stability, a challenge we meet with our LK Forza 550T. Its servo-hydraulic system delivers the precise, repeatable control over injection pressure needed to prevent surface defects, which is non-negotiable for the microscopic integrity of IP68 sealing surfaces on action camera housings.

Many competitors, lacking this level of process control, are forced to adopt a multi-stage manufacturing strategy. They injection mold the part "close" to final spec and then rely on secondary CNC machining to achieve the required tolerances on sealing grooves, button bores, and mating surfaces. On paper, this seems like a viable workaround. In practice, it's an engineering minefield and a hidden cost driver.

First, consider the risks of machining a tough, flexible polymer like a 95A TPU. The material deflects under cutter pressure, making it incredibly difficult to hold tight tolerances. Burr formation is a constant problem, and a single microscopic burr on a sealing surface can compromise the IP68 rating. The heat generated during machining can also alter the surface properties of the polymer.

Second, this two-step process introduces tolerance stack-up. The part is molded in one fixture (the mold) and then re-fixtured in another (the CNC mill). Every time a part is moved and re-clamped, a new potential for positional error is introduced. The final feature-to-feature accuracy is no longer guaranteed by the single, highly-rigid reference frame of the injection mold.

Our approach is fundamentally different. The exceptional rigidity and clamping stability of the Forza's two-platen design, paired with our expert mold engineering at MechanoFab, allows us to produce net-shape components. This means the part that ejects from the mold is the final part. There are no secondary operations. This single-process strategy completely eliminates the risks of machining TPUs and the geometric uncertainty of tolerance stack-up. Every part maintains perfect feature-to-feature accuracy and meets stringent MIL-STD-810G and IP68 standards from the moment the mold opens.

This translates directly to a lower TCO. You eliminate the cost, lead time, and quality risk of a secondary machining process. Your scrap rate plummets because the process is stable and repeatable. Your assembly process becomes faster and more reliable because every housing is a perfect geometric match for its mating components. For volumes where tooling costs are amortized but process efficiency is key, our net-shape molding strategy is not just a better way to manufacture; it's a competitive weapon.

Your Partner in Extreme-Environment Hardware

Building hardware that survives at the edge requires more than just a good design; it requires a manufacturing partner who understands the physics of failure. At MechanoFab, we've built our reputation on mastering difficult-to-mold materials and complex geometries. Our combination of material expertise, process engineering, and state-of-the-art equipment provides the foundation you need to build products that don't just work, but endure.