Weaving machines (looms)

1. Scope and Applicability

This PCR models one new, complete loom accepted at the factory gate before transport packaging. A loom interlaces warp and weft; its drive, shedding, insertion, take-up and control configuration must be declared. The Toyota JAT910 brochure documents one air-jet configuration, while a peer-reviewed smock-loom study documents a motor-driven prototype and factory performance testing. Neither provides a universal bill of materials, machine mass or manufacturing intensity [toyota-jat910-2021; sedzro-fugu-loom-2025].

Include actual component fitting, assembly, first fill and acceptance testing. Add each performed in-house fabrication exchange as a separate atomic row in the concrete data package; link purchased components to upstream datasets. Exclude fabric production, customer installation, use, maintenance and end of life. Model transport packaging separately; it is excluded from net machine mass.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.special-purpose-machinery.weaving-machines-looms
classification_refs	CPC 3.0: 44612, Weaving machines (looms)
covered_products	New complete machines whose primary function is weaving warp and weft, including configured shuttle and shuttleless looms
excluded_products	Yarn preparation, knitting and sewing machines; standalone loom parts; woven fabric; used or rebuilt machines
representative_product	One factory-accepted motor-driven loom with its installed frame, weaving mechanisms, drive, controls where fitted and first-fill oil
production_route	Purchased or internally fabricated components, fitting, assembly and functional acceptance test; actual make-or-buy route is disclosed
market_state	New complete factory-accepted machine before transport packaging and customer use

3. Reference Flow

Field	Value
What	Provide one complete machine capable of weaving warp and weft according to its declared configuration.
How much	One accepted complete machine.
How well	Declare weaving width, technology, installed mechanisms and factory acceptance result.
How long or cycle	At the factory gate after acceptance and before use; no operating lifetime is credited.
reference_flow_link	finished_loom

Field	Value
Reference amount	M
Reference product flow	Weaving machines (looms) 9a86353e-e91a-466c-be25-c022ac99dfe2
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	model; serial or batch; weaving technology and width; shedding and weft insertion type; drive and control configuration; installed accessories; first-fill state; factory acceptance; plant and period

Required qualifiers belong in dataset metadata, process notes or the reference-flow comment.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	M = accepted net mass of one complete machine of the same configuration in kg; collect using cp_machine_mass.
per_machine_basis	all inventory rows	exchange-specific property	row unit	Collect each exchange per one accepted finished machine of the same configuration; partition shared measured totals by accepted-machine count and disclose rejects and rework.

5. System Boundary

The foreground begins with incoming components or the first performed in-house fabrication step and ends with the accepted net machine before packaging. Include attributable assembly electricity, installed oil, fitting waste and test activity. Purchased inputs require upstream datasets; avoid counting internally fabricated components twice [epd-hub-core-pcr-2026].

rule_id	applies_to	rule	source_ids
sb_route	factory production	Record the actual make-or-buy route, assembly, fitting and acceptance test; add each performed fabrication operation as individually measured exchanges.	sedzro-fugu-loom-2025
sb_upstream	purchased components	Link each purchased component to a dataset with matching material and delivered state; disclose proxies.	epd-hub-core-pcr-2026
sb_gate	finished product	Stop at the factory-accepted complete loom before packaging, installation or use.	toyota-jat910-2021

Boundary Abstraction

Field	Value
declared_starting_condition	State whether major frame and weaving subassemblies arrive fabricated or are made in-house.
starting_condition_role	Incoming component gate or first performed in-house operation.
product_classification_scope	Complete CPC 3.0 44612 looms; parts and other textile machinery remain separate products.
recursive_input_rule	If a complete loom enters rework, record it as a separate input with an upstream dataset and disclose the route.
upstream_dataset_requirement	Match component state, technology, geography and reference unit; disclose missing data.
disclosure	Plant, period, model, configuration, make-or-buy boundary, accepted count, M, test yield, allocation and gaps.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
loom_build	Component fitting, assembly and factory test	required	Every accepted complete loom	Foreground factory production	One accepted complete loom, M kg net mass

These cards specify core exchanges. The concrete dataset must add each other actual component, material, energy, waste or elementary emission as an individually named atomic exchange. No case source supports a universal bill of materials.

Process: Component fitting, assembly and factory test (loom_build)

Inputs

Product flows

Fabricated frame parts (frame_parts)

Record the mass of fabricated structural parts installed in the accepted machine, including documented internal transfers.

• Selected flow: Fabricated loom structural parts and subframes 76fc68b2-37b9-41b7-b153-6d84f556c57f
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured installed frame-part mass per one accepted finished machine.
• Value mode: Foreground record (foreground_record)
• Specificity: Product or site-specific (product_specific)
• Normalization basis: per one accepted finished machine
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bom
• Sources: toyota-jat910-2021; sedzro-fugu-loom-2025

Drive motor (drive_motor)

Record the physical drive motor installed in the declared configuration; its exact database identity remains under review.

• Selected flow: Industrial loom drive motor
• Flow property / unit: Mass / kg
• Amount rule: Measured installed motor mass per one accepted finished machine.
• Value mode: Foreground record (foreground_record)
• Specificity: Product or site-specific (product_specific)
• Normalization basis: per one accepted finished machine
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bom
• Sources: sedzro-fugu-loom-2025

Electronic controller (electronic_controller)

Record the installed electronic control unit only for machines equipped with one.

• Selected flow: Weaving-machine electronic control unit
• Flow property / unit: Mass / kg
• Amount rule: Measured installed controller mass per accepted loom; zero only if documented absent.
• Value mode: Foreground record (foreground_record)
• Specificity: Product or site-specific (technology_specific)
• Normalization basis: per one accepted finished machine
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bom
• Inclusion condition: Accepted configuration includes an electronic controller.
• Sources: toyota-jat910-2021

First-fill lubricating oil (loom_lubricating_oil)

Record mechanical lubricant retained as first fill, excluding spent oil and textile-processing oil.

• Selected flow: Mineral lubricating oil for loom mechanisms
• Flow property / unit: Mass / kg
• Amount rule: Measured retained first-fill oil mass per accepted loom; zero only if oil lubrication is absent.
• Value mode: Foreground record (foreground_record)
• Specificity: Product or site-specific (technology_specific)
• Normalization basis: per one accepted finished machine
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_first_fill
• Inclusion condition: Accepted configuration uses oil-lubricated mechanisms.
• Sources: toyota-jat910-2021

Assembly and test electricity (assembly_electricity)

Record delivered electricity consumed by fitting, assembly, adjustment and acceptance testing.

• Selected flow: Grid electricity
• Flow property / unit: Electrical energy / kWh
• Amount rule: Metered electricity attributable to fitting, assembly and acceptance test per accepted loom.
• Value mode: Foreground record (foreground_record)
• Specificity: Product or site-specific (site_specific)
• Normalization basis: per one accepted finished machine
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electricity
• Sources: epd-hub-core-pcr-2026

Waste flows

Elementary flows

Outputs

Product flows

Accepted finished loom (finished_loom)

Record only a complete machine that passed factory acceptance, using its measured net mass M.

• Selected flow: Weaving machines (looms) 9a86353e-e91a-466c-be25-c022ac99dfe2
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: M kg
• Value mode: Foreground record (foreground_record)
• Specificity: Product or site-specific (product_specific)
• Normalization basis: per one accepted finished machine
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_machine_mass
• Sources: toyota-jat910-2021

Waste flows

Machining steel scrap (machining_steel_scrap)

Record segregated steel scrap generated by on-site frame fitting or machining when performed.

• Selected flow: Steel scrap from machining a88e0790-436c-44f8-b336-ee509aa8a38a
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Weighed steel machining scrap attributable to one accepted loom.
• Value mode: Foreground record (foreground_record)
• Specificity: Product or site-specific (route_specific)
• Normalization basis: per one accepted finished machine
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_scrap
• Inclusion condition: On-site steel fitting or machining generates this waste.
• Sources: sedzro-fugu-loom-2025

Elementary flows

7. Allocation and Co-product Handling

rule_id	applies_to	rule	source_ids
alloc_subdivide	shared operations	Prefer separately metered fitting, assembly and test operations.	epd-hub-core-pcr-2026
alloc_physical	remaining shared burdens	Partition measured shared inputs and outputs by a documented causal physical relationship such as machine-hours or component mass; disclose factor and basis.	epd-hub-core-pcr-2026
alloc_scrap	steel scrap	Report physical scrap mass and treatment route separately; do not silently credit avoided steel.	epd-hub-core-pcr-2026

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

| protocol_id | process_id | flow_role | record_type | raw_fields | collection_method | unit | frequency | temporal_coverage | site_scope | aggregation_rule | quality_evidence | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | cp_machine_mass | loom_build | accepted machine | acceptance and weighing record | model; configuration; serial number; accepted net mass M | Weigh the accepted complete machine on a calibrated scale, excluding transport packaging; reconcile the same configuration and acceptance record. | kg | each accepted machine | reference period | producing plant | accepted net mass per machine | scale record; acceptance certificate | | cp_bom | loom_build | frame, motor and controller | BOM and receiving or transfer record | part ID; supplier; configuration; installed count; measured unit mass | Reconcile installed parts to the accepted serial and weigh or use traceable mass records for the same configuration. | kg | each accepted machine | reference period | producing plant and supplier | installed mass / accepted machines | BOM revision; receiving and weighing records | | cp_first_fill | loom_build | installed oil | fill record | oil specification; filled mass or calibrated volume and density; spill | Weigh oil retained in the machine or convert calibrated fill volume using measured density. | kg | each accepted machine | reference period | producing plant | retained oil / accepted machines | fill sheet; calibration | | cp_electricity | loom_build | assembly and test electricity | meter and production log | meter readings; model; test hours; accepted and rejected counts | Meter relevant operations and remove unrelated loads; partition shared loads by recorded machine-hours. | kWh | batch or shift | reference period | producing plant | attributable electricity / accepted machines | meter record; allocation worksheet | | cp_scrap | loom_build | machining steel scrap | waste weighing record | mass; steel grade; job; treatment route; accepted count | Weigh segregated machining steel scrap attributable to the model. | kg | batch or shift | reference period | producing plant | attributable scrap / accepted machines | scale and transfer tickets |

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
allocate_shared	assembly_electricity, machining_steel_scrap	Attributable quantity per accepted loom = measured model-assigned quantity / accepted looms of that model; document physical allocation and rework.	cp_electricity; cp_scrap; accepted count; allocation worksheet	kWh or kg per accepted loom	epd-hub-core-pcr-2026
mass_check	finished_loom	Compare M with installed component and first-fill masses, fitting losses and weighing uncertainty; investigate unexplained differences.	cp_machine_mass; cp_bom; cp_first_fill; cp_scrap	documented mass reconciliation	epd-hub-core-pcr-2026

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_configuration	all rows	Use one accepted configuration and traceable batch or serial; disclose make-or-buy and test yield.	BOM; production and acceptance records
dq_completeness	all rows	Reconcile actual configured BOM and operations; add missing exchanges as atomic flows and disclose data gaps.	BOM; meter, waste and emission registers
dq_representativeness	upstream datasets	Disclose year, geography, technology, completeness and proxies.	dataset metadata and allocation worksheet

9. Validation Rules

rule_id	applies_to	rule	source_ids
val_identity	reference product	Confirm a complete factory-accepted CPC 44612 loom, not a part or another textile machine.	toyota-jat910-2021
val_mass	M and finished_loom	Confirm calibrated net mass M in kg for the same accepted configuration and packaging exclusion.	epd-hub-core-pcr-2026
val_inventory	all rows	Check atomic identities, UUID property and unit where present, measured per-machine basis, inclusion conditions and no upstream double count.	epd-hub-core-pcr-2026
val_gaps	publication and downstream use	Disclose unresolved flow identities and empirical range gaps; do not treat a proxy as verified.	epd-hub-core-pcr-2026

10. Published Dataset Profile

Field	Value
dataset_role	Foreground production dataset for one configured, factory-accepted new loom.
downstream_use	secondary_dataset or background_dataset after dataset review.
allowed_use	Factory-gate loom production with compatible upstream components and explicit technology and mass qualifiers.
excluded_use	Fabric production, machine use, packaging, transport, installation or end of life without separate modules; cross-technology benchmarking without configuration alignment.
required_metadata	PCR id and version; model; batch or serial; width and technology; make-or-buy route; plant; year; accepted count; M; upstream identities.
required_quality_disclosure	Measurements, data gaps, unresolved UUIDs, allocation, representativeness and uncertainty.
update_trigger	Material change to design, component supply, route, measured energy or acceptance procedure.

11. Data Sources

Source id	Type	Reference	Used for
toyota-jat910-2021	handbook	Toyota Industries Corporation, WEAVING MACHINERY JAT910 Air Jet Loom (2021.12), https://www.toyotatextilemachinery.com/wp-content/uploads/2022/01/JAT910.pdf	One complete loom's mechanism classes; no general masses or intensities
sedzro-fugu-loom-2025	literature	Sedzro et al., DESIGN OPTIMISATION OF AN AUTOMATED TRADITIONAL SMOCK (FUGU) WEAVING MACHINE, African Journal of Applied Research 11(3), 2025, https://ajaronline.com/index.php/AJAR/article/download/1159/620/2673	Prototype frame, motor, mechanism and performance-test stages; no industry range
epd-hub-core-pcr-2026	standard	EPD Hub B.V., Core Product Category Rules, version 1.2.1 (2026), https://www.epdhub.com/_files/ugd/199f85_451db462020743c4b007603b67f3c807.pdf	General manufactured-product LCA allocation and data-quality rules