{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp09_archetype_breadth150_20260804","research_id":"eoa_inverse_innovation_exp09_light_prior_art_20260804","cell_id":"buffering__chemistry_materials","search_lanes":{"direct_problem_and_intervention":{"queries":["thick thermoset composite cure exotherm phase change material tooling insert latent heat","exotherm control resin curing latent heat storage PCM mold composite"],"source_ids":["SRC1","SRC2","SRC3"],"no_result_note":null},"synonyms_and_historical_terms":{"queries":["phase change material mold temperature control thermoset curing patent","\"phase change material\" \"curing\" \"composite part\" exothermic"],"source_ids":["SRC1"],"no_result_note":null},"products_practices_and_standards":{"queries":["thick composite curing exotherm overheating thermal gradients review","site:ntrs.nasa.gov composite curing exotherm thick laminate temperature"],"source_ids":["SRC1","SRC3","SRC4"],"no_result_note":null},"component_combination":{"queries":["thick thermoset composite cure exotherm phase change material tooling insert latent heat","phase change material mold temperature control thermoset curing patent","\"phase change material\" \"curing\" \"composite part\" exothermic"],"source_ids":["SRC1","SRC2"],"no_result_note":null}},"sources":[{"source_id":"SRC1","title":"US20120227247A1 — Controlling Temperature in Exothermic Reactions with a Phase Change Material","publisher":"The Boeing Company / Google Patents","url":"https://patents.google.com/patent/US20120227247A1/en","source_type":"OTHER","claims_supported":["Discloses passive PCM integrated into composite-cure tooling, an attachable grooved plate, or a caul plate to absorb heat generated by cure exotherm.","Selects the PCM transition near or below the desired cure temperature to limit temperature excursion.","Specifically addresses composite laminates, thick or varying-thickness regions, and a simulated two-inch laminate whose exothermic overshoot is suppressed by PCM tooling."]},{"source_id":"SRC2","title":"Temperature field of thick thermoset composite laminates during cure process","publisher":"Elsevier, Composites Science and Technology","url":"https://www.sciencedirect.com/science/article/abs/pii/S0266353804002489","source_type":"PRIMARY_RESEARCH","claims_supported":["Experimental and numerical study of a 20-mm carbon-fiber/epoxy laminate included internal heat generation from exothermic cure reactions.","Measured temperature profiles supported the model, and the manufacturer's conventional cycle produced a large midpoint overshoot.","The authors concluded that thin-laminate cure cycles should be modified to reduce through-thickness gradients in thick laminates."]},{"source_id":"SRC3","title":"Evaluation of Temperature Gradients During Cure of a Thick Carbon Fiber/Epoxy Composite","publisher":"NASA Glenn Research Center","url":"https://ntrs.nasa.gov/api/citations/20200000350/downloads/20200000350.pdf","source_type":"PRIMARY_RESEARCH","claims_supported":["NASA measurements identify slow heat diffusion and internal exothermic generation as causes of surface-to-center temperature variation in thick composites.","Excess center heat can cause earlier vitrification, cure-state variation, process-induced stress, and, in severe cases, uncontrolled temperature increase and material degradation.","Embedded thermocouples recorded exotherm in thicker panels and different center-versus-tool-side conversion estimates."]},{"source_id":"SRC4","title":"Smart tooling for Energy Efficient Composite Manufacturing","publisher":"University of Bristol, Bristol Composites Institute","url":"https://composites.blogs.bristol.ac.uk/2023/05/03/smart-tooling-for-energy-efficient-composite-manufacturing/","source_type":"TRADE_PROFESSIONAL","claims_supported":["Reports that cure exotherm can turn thick composite regions into local hot spots and aggravate cure gradients.","Identifies slower heating rates as a conventional mitigation that reduces exothermic peaks but increases cycle time.","Describes zonally heated and additively manufactured tooling as alternative smart-tooling practices rather than latent-heat storage."]}],"problem_evidence":{"status":"SUPPORTED","finding":"The transient-overheating problem is directly visible in experimental and institutional evidence: thick thermoset laminates develop center-to-surface temperature and cure-state differences because internal exothermic heat is generated faster than it diffuses through the thickness. Reported consequences include midpoint overshoot, residual stress, resin cracking, inconsistent properties, degradation, and possible uncontrolled temperature increase.","source_ids":["SRC2","SRC3","SRC4"]},"closest_prior_art":[{"name":"Boeing passive PCM composite-cure tooling (US20120227247A1/US9943992B2)","source_ids":["SRC1"],"overlap":"Substantially matches the proposed core mechanism: PCM located in or attached to composite tooling absorbs exothermic cure heat by changing phase near the cure-temperature limit. It includes tool cavities, an attachable grooved plate, and PCM-bearing caul plates, plus localized placement and thick-laminate overshoot examples.","remaining_difference":"The proposal more explicitly packages the PCM as removable and instrumented and specifies enthalpy sizing, melt-fraction estimation, saturation response, containment inspection, post-peak drainage, and verified resolidification. Those are narrower operational-control features, not a distinct latent-heat cure-control mechanism."},{"name":"Measured/model-based thick-laminate cure-cycle modification","source_ids":["SRC2","SRC3"],"overlap":"Addresses the same exotherm, midpoint overshoot, through-thickness gradient, cure-state nonuniformity, and thermocouple observability problem.","remaining_difference":"These sources focus on measurement, modeling, and cure-cycle adjustment rather than temporary latent-heat storage in removable tooling."},{"name":"Zonally heated and additively manufactured smart tooling","source_ids":["SRC4"],"overlap":"Targets cure gradients, hot spots, quality loss, and slow-cycle tradeoffs through localized tool thermal control.","remaining_difference":"It changes active heat delivery and tool construction; it does not disclose bounded passive latent-energy storage that absorbs the exotherm and later drains to the existing cooling path."}],"prior_art_disposition":"SUBSTANTIAL_COLLISION","contrastive_claim_remaining":"Relative to the Boeing PCM-tooling disclosure, only a narrower, falsifiable systems claim remains: a removable PCM module with validated melt-fraction/capacity estimation, containment monitoring, pre-saturation shutdown, and verified post-exotherm resolidification can provide observable cycle-to-cycle readiness while reducing peak and gradient without extending time above the allowable temperature. The general claim of using tooling PCM to absorb composite-cure exotherm does not remain contrastive.","contrastive_claim_falsifier":"The residual claim is falsified if capacity estimates materially disagree with calorimetric or energy-balance measurements, alarms fail to precede saturation or leakage, the module does not fully resolidify by the reset deadline, or matched inert-control tests show no peak/gradient reduction or a longer time above the allowable temperature. An earlier public disclosure or product combining removable PCM cure tooling with the same state estimation, saturation protection, containment, and reset verification would also erase the remaining documentary distinction.","gates":{"adequate_source_search":{"status":"PASS","rationale":"Four search lanes covered direct phrasing, PCM/passive-temperature-control terminology, established cure practices, and component combinations. Four opened sources span three publishers and include experimental primary research, an official NASA source, institutional practice commentary, and a highly direct patent disclosure.","source_ids":["SRC1","SRC2","SRC3","SRC4"]},"supported_problem":{"status":"PASS","rationale":"Experimental and NASA evidence directly supports thick-section exothermic overshoot, surface-to-center gradients, cure-state variation, and material-quality consequences.","source_ids":["SRC2","SRC3","SRC4"]},"distinct_testable_claim":{"status":"PASS","rationale":"Although the central PCM mechanism substantially collides with SRC1, the narrower instrumentation, saturation-management, containment, drainage, and reset-verification package remains explicitly testable.","source_ids":["SRC1"]},"bounded_next_test":{"status":"PASS","rationale":"The proposed nonreactive electrical-pulse comparison against an equal-geometry inert insert is reversible and bounded, measures peak, gradient, capacity, and recovery, and has explicit proceed/no-proceed criteria. It appropriately tests the narrower operational claim before any reactive or production trial.","source_ids":["SRC1","SRC3"]},"no_obvious_safety_or_authority_stop":{"status":"PASS","rationale":"No categorical stop was identified for the authorized nonreactive surrogate. The proposal requires safety-lead approval, rated encapsulation, containment monitoring, power cutoff, external cooling, leak quarantine, and excludes production or reactive first testing. Material compatibility and pressure/expansion safety remain mandatory preconditions, not established facts.","source_ids":["SRC1"]}},"screen_survival":false,"world_novelty_boundary":"This bounded public-web screen found a substantial collision with a Boeing disclosure dating to a 2008 priority claim. It does not establish world novelty, patentability or freedom to operate, commercial adoption, market size, expert acceptance, safety certification, or realized value; the narrower instrumentation and reset-control distinction may also exist in unsearched patents, products, non-indexed literature, or internal industrial practice."}