Vapor Phase Reflow Process Shield

As part of validating the previous design, I was required to author a technical closure procedure to achieve repeatable sealing performance. The enclosure had to be assembled using a defined fastener sequence, with fasteners incrementally tightened in multiple passes using a torque wrench. Final torque values were temperature-dependent, and deviations in order or torque resulted in inconsistent sealing or enclosure distortion. While this procedure enabled vapor resistance under controlled conditions, it proved impractical for customer use, particularly during hot handling and repeated profiling cycles. 

After analyzing the failure modes of the early designs, I independently examined the sealing and latch mechanics of an ammo can to understand how reliable perimeter compression is achieved with minimal user effort. Based on that analysis, I proposed a latching clamshell architecture and shared the concept with the mechanical engineer and the head of R&D as a more robust baseline for vapor sealing. This discussion directly informed the subsequent prototype and established the mechanical direction that the final design was built upon. 

A major failure mode in early testing was vapor intrusion past the primary perimeter seal during condensation. To address this without redesigning the enclosure, I lightly modified the internal yoke to incorporate an O-ring gland, creating a secondary vapor barrier. After many 3D-printed prototype iterations, I converged on a gland geometry that optimized O-ring stretch and compression interference with the housing. This provided reliable sealing across thermal cycling without over-constraining the enclosure or affecting thermal response. The O-ring is a low-cost, standard component that can be easily replaced by the customer if damaged, preserving long-term serviceability with minimal added complexity. 

I introduced a reduced cross-section seal lip to locally concentrate sealing pressure into the primary silicone gasket. The clamps originally specified were not capable of generating sufficient force to uniformly compress the gasket and achieve a watertight seal. By reducing the contact area, the seal lip effectively concentrates clamp load and allows the gasket to properly deform and seal without increasing latch force or changing the clamp hardware. I also added internal chamfers to guide the O-ring during closure, preventing pinching or rolling and ensuring consistent engagement. Together, these changes improved sealing reliability while remaining compatible with the existing clamp system. In testing this was able to consistently seal the thermal profiler from vapor and vacuum even during back to back runs.

After validating the 7-channel prototype with consistent, repeatable success in vapor-phase oven testing, I was tasked with scaling the design to support higher channel counts. This resulted in a 9-channel iteration capable of accommodating nine independent thermocouple measurements, followed by a 12-channel version. Each variant maintained the same design language and functional hardware as the original, preserving sealing performance, usability, and manufacturability while scaling the internal architecture to support additional measurement capacity. To assist with ease of manufacturing I have created a version 2.0 that will be easier and cheaper to machine. 

For the initial production launch, I hand-built and assembled the first stock of Vapor Phase Shields to support the product release and ensure the manufacturing process was ready for ramp-up. This included preparing the shield assemblies, verifying fit and function, and documenting the assembly steps needed to transition the build over to our in-house production team.

By completing the first production units myself, I was able to identify small process improvements, confirm the assembly workflow, and help create a smoother handoff for future production builds.

The SPS 7ch Vapor Phase Shield was officially released as a production product following final validation and manufacturing handoff. This release marked the transition from prototype development into stocked customer-ready units, with the shield designed specifically to protect the SPS profiler during vapor phase soldering.

The final design uses a two-piece assembly that shields the profiler from both process heat and vapor fluid exposure while still allowing quick setup, serviceability, and thermocouple connection. I supported the release by building the initial production units, preparing assembly documentation, and helping transition the process into regular in-house manufacturing.

At APEX 2026, I presented my shield as part of our broader product line and connected with customers who had been anticipating its release. One of the most meaningful conversations was with someone who had prototyped an earlier iteration of the design that I did not originally create. Seeing his reaction to the updated version was incredibly satisfying—he was very happy with how far the product had come and could clearly see the improvements. It was a strong reminder of the value of thoughtful engineering, iteration, and pushing an existing concept toward a far better final product. 

Once the first units were deployed, I received photos and videos showing the shields successfully running through customer vapor phase machines without leaks. Customer feedback then led to an additional requirement: a raised platform to minimize the effect of the shield’s thermal mass on the recorded profile. In response, I quickly designed and welded a prototype platform, which was sent with our sales manager for customer evaluation. 

To support customer testing, I rapidly fabricated and laser-etched a proof-of-concept raised platform using available stock components and spare standoffs from previous projects. While the first iteration was intentionally simple and lightweight, its purpose was to validate the concept in the field. During the customer demo, the sales manager was pleased with the prototype’s performance and is now awaiting my current CAD iteration. In parallel, I am developing a thinner, lighter V2 concept that incorporates dimple-die geometry for added stiffness and weight reduction.