Phenolic Cookware Handle With Metal Insert to Prevent Rotation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cookware handles, even those made from high-heat resistant phenolic resin, are prone to failure under extreme conditions such as direct contact with a gas flame, leading to potential safety hazards due to lack of secure attachment and heat resistance.
Innovation Solution
A cookware handle design featuring a metal insert with a screw boss and a cured phenolic overmold that encapsulates the insert, providing a secure and heat-resistant connection by preventing rotation and maintaining an air gap through a spacer, ensuring durability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a solid phenolic handle is used, then heat resistance is improved, but strength and durability under extreme conditions deteriorate
Solution Approach 1:
The patent combines phenolic resin (providing heat resistance) with metal reinforcement (providing strength) to create a composite handle structure. The metal insert is embedded within the phenolic material, allowing both materials to contribute their superior properties to the final product, resolving the contradiction between heat resistance and strength.
2Strength
If metal reinforcement is added to phenolic handles, then strength is improved, but reliability deteriorates due to rotation and poor securing
Solution Approach 1:
The metal reinforcement is divided into multiple segments or inserts distributed throughout the phenolic handle structure. This segmentation prevents rotation by creating multiple anchor points that distribute mechanical stresses, eliminating the rotation problem associated with single-point metal inserts while maintaining enhanced strength.
Solution Approach 2:
The metal inserts are pre-positioned and secured within the phenolic handle during the molding process, before the handle is subjected to use conditions. This preliminary securing action ensures that the metal reinforcement cannot rotate or move relative to the phenolic material, guaranteeing reliable attachment from the start of the product's lifecycle.
3Ease of operation
If soft materials like silicone rubber are used for handles, then ease of gripping is improved, but heat resistance and durability deteriorate
Solution Approach 1:
The patent creates a composite structure where phenolic resin provides the heat-resistant base material and metal inserts provide structural reinforcement. This combination maintains the heat resistance of phenolic while adding the strength of metal, avoiding the heat resistance problems of soft materials like silicone rubber.
4Strength
If hollow phenolic handles with metal screws are used, then strength is improved, but reliability deteriorates due to rotation susceptibility
Solution Approach 1:
The metal reinforcement is divided into multiple segments or inserts distributed throughout the phenolic handle structure. This segmentation prevents rotation by creating multiple anchor points that distribute mechanical stresses, eliminating the rotation problem associated with single-point metal inserts while maintaining enhanced strength.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in a long-lasting, high-heat resistant cookware handle with enhanced strength and secure attachment to the vessel, reducing the risk of catastrophic failures and improving user safety.
Implementation Method 1
The overmold is molded over the insert into the shape of a handle. The overmold may encapsulate the insert and the screw boss
Implementation Method 2
a spacer interfits with the hole in the overmold and the vessel to maintain an air gap between the handle and the vessel
Data Source
AI summary
A cookware handle includes a metal insert and a cured phenolic overmold molded over the insert. The metal insert may be shaped to prevent movement of the overmold with respect to the insert, and may include a screw boss for attaching the handle to a cookware vessel. The overmold is molded over the insert into the shape of a handle. The overmold may encapsulate the insert, and may define a hole aligned with the screw boss to receive a screw that extends through the screw boss and into the cookware vessel. The present invention also includes a method for manufacturing a cookware handle, including the steps of a) providing a metal insert having an attachment portion; b) overmolding a phenolic molding material over the insert, the overmold shaped in the form of a cookware handle; and c) attaching the overmold and insert to a cookware vessel with the attachment portion of the insert.