ovenware
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Solution Overview
Problem
Large ovenware produced by injection molding often suffers from flow marks and inferior external appearance due to deformation and cracking issues, which are less common in smaller ovenware.
Innovation Solution
The use of a resin composition comprising a liquid crystal polyester resin and a talc filler with an average particle size of at least 10 um but not more than 25 um, which prevents flow marks and enhances strength, allowing for the production of large ovenware with a capacity of at least 500 mL to 6 L without compromising external appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If injection molding is used to produce large ovenware, then manufacturing efficiency and design flexibility are improved, but flow marks and inferior external appearance occur
Solution Approach 1:
The patent changes the particle size parameter of the talc filler from conventional small sizes to a specific range of 10-25 μm. This parameter change modifies the flow characteristics of the resin composition during injection molding, reducing flow marks and improving external appearance quality while maintaining manufacturing efficiency
Solution Approach 2:
The patent uses a composite resin composition combining liquid crystal polyester resin with talc filler of specific particle size (10-25 μm). This composite material provides both the manufacturing efficiency of injection molding and improved external appearance by preventing flow marks through optimized filler characteristics
2Volume of stationary object
If large ovenware is produced, then capacity and utility are improved, but deformation and cracking issues arise
Solution Approach 1:
The patent changes the particle size parameter of the talc filler to 10-25 μm, which optimizes the mechanical properties of the molded product. This parameter adjustment prevents deformation and cracking in large ovenware while maintaining the desired capacity, by improving the overall strength and dimensional stability of the material
Solution Approach 2:
The patent applies local quality improvement by using talc filler of specific particle size (10-25 μm) that targets the structural integrity issue in large ovenware. The optimized filler distribution and size provide localized reinforcement that prevents deformation and cracking in critical areas while maintaining the large capacity
3Device complexity
If talc filler with small particle size is used, then resin composition flexibility is improved, but flow marks increase
Solution Approach 1:
The patent changes the particle size parameter of the talc filler from small conventional sizes to a specific range of 10-25 μm. This parameter change reduces flow marks and improves surface quality while maintaining the flexibility of the resin composition for various molding applications
Data Source
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AI summary
Ovenware having a container portion and a handle portion, wherein the ovenware is molded from a resin composition comprising a liquid crystal polyester resin and a talc filler, the amount of the talc filler is at least 55 parts by mass but not more than 100 parts by mass per 100 parts by mass of the liquid crystal polyester resin, the capacity of the ovenware is at least 500 mL but not more than 6 L, and the wall thickness of the container portion is at least 0.3 mm but not more than 5 mm.