{
  "schema_version": 1,
  "id": "pcr.metal-products-machinery-and-equipment.special-purpose-machinery.metal-laser-powder-bed-fusion-machinery",
  "title": {
    "en-US": "Metal laser powder-bed-fusion machinery manufacture",
    "zh-CN": "金属激光粉末床熔融机械制造"
  },
  "status": "candidate",
  "pcr_kind": "product_category_rule",
  "content_maturity": "authored_methodology",
  "version": "0.1.0",
  "domains": [
    "metal-products-machinery-and-equipment"
  ],
  "modules": {
    "core": [
      "pcr-minimum-content",
      "unit-of-analysis",
      "reference-flow",
      "inventory-flow-taxonomy",
      "system-boundary",
      "allocation",
      "data-quality",
      "validation-rules"
    ]
  },
  "target_entities": [
    "flow",
    "process",
    "lifecyclemodel",
    "dataset"
  ],
  "languages": {
    "canonical": "en-US",
    "available": [
      "en-US",
      "zh-CN"
    ]
  },
  "translation_status": {
    "zh-CN": "aligned"
  },
  "classification_refs": [
    {
      "system": "CPC",
      "version": "3.0",
      "code": "44920",
      "title": "Machines for additive manufacturing",
      "mapping_type": "narrower"
    }
  ],
  "review_metadata": {
    "scientific_review": "pending",
    "semantic_boundary_decision": "New complete configured metal laser powder-bed-fusion machine manufacturing record, narrower than CPC44920. Exclude polymer, binder jetting, directed-energy deposition, electron-beam and subtractive laser technologies, spare parts and customer cells. Local material index has no same complete LPBF machine methodology; subtractive laser tools and standalone lasers have distinct delivered product and manufacturing/test boundaries. Old scaffold and shared mapping untouched. Actual delivered chamber/laser/optics/platform/recoater/powder/gas/cooling/control modules, build plate and retained working fluids define M. Factory trials included, customer printed-part production excluded.",
    "unresolved_flow_identities": [
      {
        "row_id": "steel_sheet",
        "selected_flow": "Hot-rolled non-alloy steel sheet",
        "reason": "Direct non-alloy stock candidate has alloy-steel description; not adopted for non-alloy sheet."
      },
      {
        "row_id": "solid_wire",
        "selected_flow": "Copper-coated solid carbon-steel welding wire",
        "reason": "Retrieved electrical/flux-cored wires do not establish copper-coated solid carbon-steel welding wire."
      },
      {
        "row_id": "argon",
        "selected_flow": "Argon gas for welding",
        "reason": "Multiple pure-gas/English/Chinese searches returned unrelated or phase/composition-unspecified candidates; no verified pure welding argon gas."
      },
      {
        "row_id": "caustic",
        "selected_flow": "Sodium hydroxide cleaning reagent, supplied concentration declared",
        "reason": "Pure and fixed-concentration candidates do not establish actual supplied aqueous cleaner concentration."
      },
      {
        "row_id": "alkaline_effluent",
        "selected_flow": "Spent aqueous alkaline cleaning solution",
        "reason": "No verified segregated aqueous alkaline cleaning waste gate and composition established by retrieved candidates."
      },
      {
        "row_id": "ball_bearing",
        "selected_flow": "Steel radial ball bearing",
        "reason": "Broad ball/roller bearings, cages and wind-turbine parts do not identify one steel radial ball bearing."
      },
      {
        "row_id": "fastener",
        "selected_flow": "Carbon-steel bolt",
        "reason": "Broad steel fastener records do not verify an individual bolt grade/coating."
      },
      {
        "row_id": "pack_board",
        "selected_flow": "Corrugated paperboard protective pad",
        "reason": "Cardboard/boxes and fibre/flute-limited cardboard candidates do not establish actual corrugated protective pad."
      },
      {
        "row_id": "build_chamber",
        "selected_flow": "Finished stainless-steel powder-bed-fusion build chamber",
        "reason": "Retrieved stock, finished machine or broad parts records do not verify one finished stainless-steel LPBF chamber and its seals/door gate."
      },
      {
        "row_id": "fibre_laser",
        "selected_flow": "Complete ytterbium-fibre laser module",
        "reason": "Searches return raw ytterbium/oxides and optical-disc pickup/photocomposing products, not complete Yb-fibre LPBF laser module."
      },
      {
        "row_id": "scan_head",
        "selected_flow": "Complete galvanometer laser scan head",
        "reason": "Document-scanner parts and unrelated machine holders do not establish galvanometer beam-steering head."
      },
      {
        "row_id": "f_theta_lens",
        "selected_flow": "Finished fused-silica F-theta laser lens",
        "reason": "Glass tubing/blanks, adhesive and silica stock do not establish a finished coated fused-silica F-theta lens."
      },
      {
        "row_id": "protective_window",
        "selected_flow": "Finished fused-silica laser protective window",
        "reason": "Retrieved quartz glass tubing does not identify a finished coated laser protective window."
      },
      {
        "row_id": "build_platform",
        "selected_flow": "Complete powder-bed-fusion build-platform actuator",
        "reason": "General motors, testing actuators and wind pitch drives do not establish the configured complete build-platform actuator."
      },
      {
        "row_id": "recoater",
        "selected_flow": "Complete metal-powder recoating unit",
        "reason": "Retrieved coated loom parts are not a powder recoating unit; completed unit and included blade/drive boundary unresolved."
      },
      {
        "row_id": "powder_hopper",
        "selected_flow": "Finished stainless-steel metal-powder hopper",
        "reason": "Raw iron powder and stock steel do not establish a finished stainless-steel powder hopper."
      },
      {
        "row_id": "gas_recirculation",
        "selected_flow": "Complete inert-gas recirculation and filtration module",
        "reason": "Ultrafiltration, engine filters and instrument air are not an installed inert-gas recirculation/filtration module."
      },
      {
        "row_id": "glass_filter",
        "selected_flow": "Finished glass-microfibre gas-filter cartridge",
        "reason": "Generic cartridge/glass-fibre stock does not verify finished glass-microfibre gas cartridge and binder/housing."
      },
      {
        "row_id": "chiller",
        "selected_flow": "Complete liquid-cooling chiller unit",
        "reason": "Retrieved compressed air/unrelated contexts do not establish a complete liquid-cooling chiller with charged-fluid gate."
      },
      {
        "row_id": "controller",
        "selected_flow": "Complete metal-LPBF electronic control cabinet",
        "reason": "Direct steel cabinet candidate e1f661bb uses Energy reference, inconsistent with selected finished cabinet mass; no mass identity substituted."
      },
      {
        "row_id": "coolant",
        "selected_flow": "Aqueous ethylene-glycol secondary coolant, supplied concentration declared",
        "reason": "Direct coolant candidate92c6fd56 is wind-plant operation and unspecified glycol/formulation, not verified supplied aqueous ethylene-glycol secondary coolant."
      },
      {
        "row_id": "delivered_build_plate",
        "selected_flow": "Finished 316L stainless-steel build plate",
        "reason": "Stock/scrap stainless steel is not a finished machined 316L build plate with delivered surface and gate."
      },
      {
        "row_id": "purge_argon",
        "selected_flow": "Gaseous argon for factory chamber trials",
        "reason": "Repeated English and Chinese gas searches returned unrelated candidates; no verified pure gas-phase argon identity. No database-wide absence claim."
      },
      {
        "row_id": "trial_powder",
        "selected_flow": "Gas-atomized 316L stainless-steel factory-test powder",
        "reason": "Direct SLM feedstock candidate9aadde09 describes non-ferrous examples and class41601; cannot identify specific gas-atomized 316L stainless powder. Refined316L searches unrelated."
      },
      {
        "row_id": "trial_coupon",
        "selected_flow": "Waste 316L stainless-steel LPBF test coupon",
        "reason": "Search returned aluminium/silicon/general steel scrap and wiring-board scrap, not verified segregated discarded316L LPBF test coupon with support/waste gate."
      },
      {
        "row_id": "trial_condensate",
        "selected_flow": "Captured 316L-build filter-condensate waste",
        "reason": "Search returned unrelated strontium carbonate, organotin and PCB chemical records, not a characterized captured316L-build condensate waste."
      },
      {
        "row_id": "spent_filter",
        "selected_flow": "Spent glass-microfibre filter cartridge contaminated by 316L trial powder",
        "reason": "Generic used filter/glass fibre categories do not establish a waste cartridge with confirmed glass-microfibre media and316L contamination."
      }
    ],
    "unresolved_evidence": [
      "Measured M, full delivered BOM and module constituents, actual factory route, supplier chemical/optical/filter/coolant composition, test-powder alloy/state, gas recipe and trial quantities/acceptance criteria require foreground collection. No catalogue machine mass, operational power/gas flow, generic life or compulsory process invented.",
      "Scientific and independent translation reviews pending. Two manufacturer architecture sources are not quantitative machine-manufacturing intensity evidence."
    ],
    "identity_rejections": [
      {
        "candidate": "ce3ac926-5d6f-4558-9edc-67179d93dde4",
        "reason": "Direct non-alloy stock candidate has alloy-steel description; not adopted for non-alloy sheet."
      },
      {
        "candidate": "92233c86-8e75-441c-94de-03cc91bc7c10",
        "reason": "Bottling inerting/vented makeup gas, not LPBF chamber trial input."
      },
      {
        "candidate": "e1f661bb-61f2-49ca-95db-990d02ebbd29",
        "reason": "Direct steel cabinet candidate e1f661bb uses Energy reference, inconsistent with selected finished cabinet mass; no mass identity substituted."
      },
      {
        "candidate": "92c6fd56-f8a2-45ed-bb52-c4238cf8927c",
        "reason": "Direct coolant candidate92c6fd56 is wind-plant operation and unspecified glycol/formulation, not verified supplied aqueous ethylene-glycol secondary coolant."
      },
      {
        "candidate": "9aadde09-9593-47ce-a092-4695d0599aba",
        "reason": "Direct SLM feedstock candidate9aadde09 describes non-ferrous examples and class41601; cannot identify specific gas-atomized 316L stainless powder. Refined316L searches unrelated."
      }
    ],
    "inventory_contract": {
      "atomic_flows": "v1",
      "localized_flow_names": "tiangong_zh_v1"
    }
  }
}