Injection Molded Part Traceability Using Chain-of-Quality Data
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Solution Overview
Problem
Current quality control systems for injection molded parts in plastics processing plants face challenges in accurately assigning quality data to specific parts due to incomplete monitoring and recording of parameters across the production chain, leading to difficulties in tracing the manufacturing process and evaluating device contributions over time.
Innovation Solution
A method where each injection molded part is assigned a quality contribution that aggregates device and material contributions from various stations, allowing for complete tracking of parameters from granule conveyance to finished product, with data stored on a storage medium or database for easy evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is recorded by each device in the production chain and stored in a database, then complete quality monitoring is achieved, but it becomes difficult to clearly assign the collected quality data to a specific injection-molded part
Solution Approach 1:
The patent divides the production process into discrete segments or stations, with each station recording its own quality data separately. This segmentation allows clear attribution of quality data to specific parts by maintaining the association between each part and the specific station that produced or processed it, thereby resolving the contradiction between complete monitoring and data assignment clarity.
Solution Approach 2:
The system implements feedback mechanisms where quality data from each station is continuously fed back to the central database with clear part identification. This feedback loop ensures that complete quality information is captured while maintaining unambiguous links between quality data and specific injection-molded parts through persistent part identifiers throughout the production chain.
2Loss of information
If quality data from multiple devices is collected and stored, then comprehensive quality information is available, but the effort to evaluate and sequence data according to process flow increases significantly
Solution Approach 1:
The patent applies preliminary action by having each device stamp or record its quality data with part identifiers and process sequence information at the time of production. This preliminary tagging of data with contextual information eliminates the need for complex post-processing sequencing, as the data is already organized in the correct process flow order when collected.
Solution Approach 2:
The system introduces an intermediary database structure that automatically sequences and organizes quality data from multiple devices based on pre-defined process flow relationships. This intermediary layer handles the complexity of data sequencing automatically, reducing the evaluation burden while maintaining comprehensive quality information from all production stations.
3Measurement precision
If production parameters are monitored at various stations, then quality characteristics are recorded, but complete monitoring of the entire processing process is not possible
Solution Approach 1:
The patent merges quality data from multiple discrete monitoring stations into a unified quality record for each injection-molded part. By combining data from granulate conveyance, processing, and finishing stations into a single comprehensive quality profile, the system achieves complete process monitoring while maintaining precise measurement of individual quality characteristics at each stage.
Data Source
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AI summary
The invention relates to a method for the quality control and/or tracking of an injection molded part (3) produced in a production cycle using preferably at least one processing machine (4) of the plastic processing industry and a plastic processing facility, in which production means or devices (31) or stations (31) arranged upstream or downstream are connected together preferably via a network (49). Each individual injection molded part (3) or a specified number (charge 65) of injection molded parts (3) is assigned a quality value (33) composed of multiple quality values (33a to 331) in that each device (31) or station (31) in the production chain ascertains or generates its own quality value (33a to 331) and extends same by the transmitted quality values (33a to 331) of each previous device (31) or previous station (31) and forwards same as the new quality value (33, 33a to 331) to the following device (31) or following station (31) or in that a separate collecting station (48), in particular a hardware and software (COQ - chain of quality), requests the quality values (33, 33a to 331), in particular the device values (32) and/or material values (50) thereof, from the individual devices (31) or stations (31) or is transmitted thereto, and the collecting station (48) puts said values into correlation.