Asymmetric Runner System for Odd-Column Molding

Solution Overview

Problem

Conventional molding systems are limited in their ability to accommodate substrates with odd or prime numbers of columns of molding positions due to the uniform arrangement of runners, which restricts the versatility of substrates that can be molded.

Innovation Solution

An asymmetric runner system is introduced, where at least one mold supply pot has a different number of runners on one side compared to the other, allowing for odd or prime numbers of columns to be molded by adjusting the cross-sectional areas of the runners to maintain uniform mold packing pressure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a uniform arrangement of runners is used on both sides of the mold supply pot, then constant mold packing pressure is maintained, but the system can only accommodate substrates with an even number of columns

Engineering Contradiction:

Improvesubstrate type accommodationVSAvoidrunner arrangement complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies asymmetry by configuring a different number of runners on opposite sides of the mold supply pot. Specifically, one side has an odd number of runners while the other side has an even number of runners, allowing the system to accommodate substrates with odd numbers of columns that cannot be molded with traditional symmetric runner arrangements

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent applies local quality by making the runner distribution non-uniform across different locations. The cross-sectional areas of individual runners are adjusted locally to compensate for the asymmetric configuration, ensuring that each runner delivers the appropriate amount of molding compound to maintain constant mold packing pressure despite the asymmetric arrangement

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If the number of runners on opposite sides of the mold supply pot is made different, then substrates with odd or prime numbers of columns can be molded, but uniform mold packing pressure becomes difficult to maintain

Engineering Contradiction:

Improvesubstrate type accommodationVSAvoidmold packing pressure uniformity

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies local quality by making the runner distribution non-uniform across different locations. The cross-sectional areas of individual runners are adjusted locally to compensate for the asymmetric configuration, ensuring that each runner delivers the appropriate amount of molding compound to maintain constant mold packing pressure despite the asymmetric arrangement

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS8292613B2Runner system for supplying molding compound

Publication Date: 2012.10.23 ASMPT SINGAPORE PTE LTD

AI summary

A runner system for a molding apparatus comprises a plurality of runner networks, each runner network further comprising a mold supply pot having a first side and a second side opposite to the first side. A plurality of molding cavities are located on the first and second sides of the mold supply pot, and a plurality of runners are operative to channel molding compound from each mold supply pot to the plurality of molding cavities. At least one of the mold supply pots comprises a different number of runners located on the first side which are connected to the mold supply pot as compared to a number of runners located on the second side which are connected to the mold supply pot.