Compression Molding Device Resin Supply Accuracy
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Solution Overview
Problem
Existing compression molding devices face challenges in accurately measuring the weight and volume of components and connection members on a workpiece, leading to errors in resin supply, especially when components are missing, as the weight and volume of connection members vary based on their shape and size, and the quantity of missing chips may not match the quantity of missing connection members.
Innovation Solution
A compression molding device that includes a measuring part to weigh the workpiece, a calculation part to calculate the total volume of components and connection members based on the workpiece weight, and a supply part to adjust the resin supply amount accurately, considering the total volume of mounted objects, thereby improving the accuracy of resin supply and reducing defective products due to excess or deficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the resin supply amount is calculated based on the number of missing chips only, then the calculation is simple, but the accuracy of resin supply is poor because connection members are not considered
Solution Approach 1:
The invention changes the calculation parameter from counting only missing chips to measuring the actual weight of the workpiece. By using weight measurement and calculating the difference from the standard weight, the system accurately determines the total volume of missing mounted objects (both components and connection members) without needing to individually identify or count each missing element.
2Measurement precision
If the weight and volume of each connection member are measured individually, then the accuracy of resin supply is improved, but the measurement and calculation process becomes complex and time-consuming
Solution Approach 1:
The invention merges the measurement of components and connection members into a single weight measurement process. Instead of separately measuring and calculating the volume of each connection member and component, the system measures the total weight of the workpiece and uses the weight difference to determine the combined volume of all missing mounted objects, significantly simplifying the measurement process while maintaining accuracy.
3Productivity
If the resin supply is adjusted based on missing chip quantity only, then the process is quick, but defective products occur due to excess or deficiency of resin
Solution Approach 1:
The invention implements a feedback mechanism where the actual weight of the workpiece is measured, compared against the standard weight, and the difference is used to automatically adjust the resin supply amount. This closed-loop feedback system ensures that the resin supply accurately reflects the actual state of the workpiece, preventing both excess and deficiency of resin while maintaining high production speed.
Data Source
AI summary
A compression molding device compression-molds resin to a workpiece in which components are mounted on a carrier via connection members, and produces packages each having at least one component resin-sealed therein. The compression molding device comprises: a measuring part measuring the weight of the workpiece; a calculation part calculating the supply amount of the resin based on the weight of the workpiece measured by the measuring part; a supply part supplying the resin in the supply amount calculated by the calculation part; and a molding die for compression-molding, to the workpiece, the resin supplied by the supply part. The calculation part calculates the total volume of mounted objects, including the components and the connection members, based on the weight of the workpiece and calculates the supply amount of the resin based on the total volume of the mounted objects.