What This Category's Data Looks Like
Daily documents for this category include injection molding process cards, raw material drying records, mold histories, first-piece inspection forms, patrol inspection forms, material change and machine cleaning records, and more. Data sources include resin batch property sheets, injection molding machine parameters, mold temperature controllers, MES systems, and dimensional and appearance inspection results. Data updates occur per production batch, each mold or material change, and once per shift. Document structures mostly consist of fixed-format record sheets and a small amount of free-text descriptions. Fields include mold number, resin batch number, process temperature, holding time, defect type, and more. Common units are degrees Celsius, seconds, megapascals, and others.
Constraints on Document Parsing and Chunking
Diverse document types have large structural differences, mixing fixed-format record sheets and free-text descriptions. Chunking logic must balance parameter relevance and text integrity. Frequently updated production data requires parsing workflows that support fast bulk uploads. Core process parameters such as filling, holding, and cooling windows, plus raw material drying parameters, must be fully retained in a single chunk. This prevents context loss from splitting. Significant differences in field formats across documents require adapting parsing rules for multiple document types. This ensures key information such as batch numbers and inspection results is not lost.
Configuration Settings
The following configurations are based on FastGPT v4.17.0.
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Injection molding ledger documents contain both single sets of process parameter rows and full descriptions of single patrol inspection records. This range preserves complete context for a single set of associated data |
chunkSplitter | Split by paragraph + semantic chunking | Injection molding documents include fixed-format record sheets and free-text defect analysis. Semantic chunking avoids forcibly splitting associated parameter groups |
customPdfParse | Enabled | Injection molding process cards are often PDF tables with merged cells. Enabling this preserves table rows, columns, and cell association relationships, preventing parameter misalignment |
PARSE_FILE_TIMEOUT_SECONDS | 300–600 seconds | Large ledger files containing multiple batches of data take longer to parse. This range covers most bulk upload scenarios |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Bulk uploaded mold history or multi-shift patrol inspection form files have large sizes. This upper limit meets conventional bulk upload requirements |
chunkSettingMode | Custom mode | Chunking requirements vary significantly across different injection molding documents. Custom mode allows flexible adjustment of parameters to adapt to various scenarios |
Three Common Mistakes
- Symptom: After uploading an injection molding process card PDF, mold temperature parameters and their corresponding holding times are split into separate chunks. Cause: Fixed character count chunking was used, and semantic chunking was not enabled. Associated parameter groups were forcibly split based on character thresholds.
- Symptom: After uploading bulk raw material drying record Excel files, some batch data fields appear empty. Cause: No dedicated parsing rules were configured for table-based documents. The default parsing logic did not retain merged cell batch association information, leading to data loss.
- Symptom: After uploading a mold history file larger than 400 MB, the interface displays a request failure. Cause:
PARSE_FILE_TIMEOUT_SECONDSwas not adjusted to a reasonable range. Large file parsing time exceeded the default threshold, triggering a timeout error.
How to Verify Proper Configuration
- Upload a single injection molding process card PDF. Check if parsed chunks include a complete filling, holding, and cooling window parameter group.
- Upload a single Excel-format raw material drying record. Verify that parsed result fields match the original document completely.
- Upload a moderately sized bulk patrol inspection form file. Confirm the parsing process does not trigger timeout errors.
- Adjust the
chunkSizeparameter. Compare chunking results across different values to confirm core process parameters are not split.
The values provided are common starting points and should be measured against the reader's own samples.