What Data Looks Like for This Category
Daily documents for this category include injection molding process cards, raw material drying records, mold history logs, first article inspection reports, patrol inspection forms, and material change and machine cleaning records. Data sources cover resin batch property sheets, real-time injection molding machine parameters, mold temperature controller data, MES system records, and dimensional appearance inspection results. Data update frequency aligns with production rhythm; new records are created for each product batch, each mold change and material swap, and after each shift. Most document structures include fixed fields such as temperature, pressure, and time parameters, plus identification fields like batch number and mold number. Some documents present process parameters and test results in table format.
Constraints on Document Parsing and Chunking
Fixed fields and tabular document structures require the parsing stage to preserve the correspondence between parameters and identifiers, to avoid losing field associations after chunking. High-frequency updated production records require parsing and chunking workflows to be efficient, to support rapid processing of batch documents. Parameter unit differences across multiple data sources—such as MPa for injection molding machine pressure and ℃ for mold temperature—require the parsing process to retain original unit information. Document updates triggered by mold changes and material swaps require chunking to split documents by production batch or process, to ensure subsequent retrieval can associate all data from the same production stage. Unlike other process industry categories, documents for this category do not need to link parameters from cross-linking and curing stages, so parsing logic can be simplified in a targeted manner. Fields related to raw material drying and recycle material ratio must be retained.
Configuration Settings
| Configuration Item | Recommended Approach | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | The length of single-process parameter groups in injection molding process documents falls within this range, preserving complete context for process parameters |
chunkSplitter | Split by process segment | Injection molding documents are mostly divided by content such as filling, holding pressure, and cooling stages. Splitting by process preserves complete parameter associations for the same production stage |
customPdfParse | Enabled | Injection molding process cards often include parameter tables and identification fields. Custom parsing can accurately retain field correspondence |
PARSE_FILE_TIMEOUT_SECONDS | 180–300 seconds | Parsing batch mold history logs and patrol inspection forms takes a long time. This range avoids parsing interruptions due to timeouts |
UPLOAD_FILE_MAX_SIZE | 2000 MB | Summary files for mold history from a single batch may reach large sizes. This setting supports batch document uploads |
chunkSettingMode | Manual mode | Injection molding documents have fixed structures. Manually configuring chunking rules allows more precise matching of business scenarios |
Three Common Configuration Mistakes
- Issue: When uploading batch injection molding process PDF files, FastGPT reports a timeout, but the parsing service log shows parsing succeeded. Cause: The
PARSE_FILE_TIMEOUT_SECONDSparameter was not adjusted, and the default timeout duration is shorter than the time required for batch document parsing. - Issue: When reading Excel files for injection molding patrol inspection forms, key parameter fields are missing from the extracted content. Cause: Parsing rules adapted for injection industry documents were not configured, so fixed business fields in tables cannot be recognized.
- Issue: Parsed exception reports cannot be linked to corresponding process parameters by the model. Cause: Chunking separated paragraphs of exception phenomena and corresponding process parameters, resulting in incomplete context being unavailable during retrieval.
How to Verify Proper Configuration
- Upload a single injection molding process card PDF, check if the parsed text retains all process parameter fields and original units.
- Adjust the
chunkSizeparameter, then verify if chunking results split content completely by process without separating critical parameter groups. - Upload batch production record documents, confirm that parsing progress does not interrupt and no timeout errors occur.
- Test reading Excel-format raw material drying records in the FastGPT v4.17.0 workflow, confirm that batch number and drying temperature fields can be extracted.
The values provided are common starting points and should be evaluated against the user's own samples.