Offset Cutting Blades for Viscous Substance Stability
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Solution Overview
Problem
Cutting highly-viscous substances with a pair of blades can cause blade edge damage and bending of the substance, and existing solutions require complex mechanisms like liquid nitrogen for stabilization.
Innovation Solution
The cutting apparatus employs a pair of cutting blades with thickness gradually increasing from the edge to the root, where the blade edges are offset and made of materials with varying hardness, allowing for side-by-side cutting without direct contact and using resin surfaces to prevent damage and bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a pair of cutting blades are used to cut the elongated-shaped highly-viscous substance from both sides, then the substance can be restrained from bending at the time of cutting, but the blade edge parts may come into contact with each other and cause damage
Solution Approach 1:
The cutting blades are designed with asymmetric thickness distribution, where the thickness gradually increases from the blade edge leading end toward the blade root part. This asymmetric design ensures that when the blades approach each other for cutting, the thicker blade root parts make contact first, while the thinner blade edge parts remain offset and do not contact, thus protecting the blade edges from damage while maintaining substance stability
Solution Approach 2:
The invention introduces a thickness direction dimension to the cutting blade design, creating an offset in the thickness direction between the blade edge parts of paired blades. This dimensional offset allows the blades to approach each other in the width direction for cutting while preventing edge-to-edge contact through the thickness direction offset, resolving the contradiction between substance stability and blade reliability
2Stability of the object's composition
If liquid nitrogen is ejected toward the extruded elongated-shaped highly-viscous substance to cool and harden it, then the substance can be cut without bending, but a complicated ejecting mechanism is required and running costs increase
Solution Approach 1:
The invention extracts and eliminates the liquid nitrogen ejecting mechanism from the cutting system. Instead of using external cooling to harden the substance, the design relies on the mechanical configuration of the cutting blades themselves (asymmetric thickness and offset arrangement) to achieve stable cutting without bending, thereby removing the complex ejecting mechanism and associated running costs while maintaining substance stability
3Reliability
If the blade edge parts of the pair of cutting blades come into contact with each other, then direct contact occurs between the weakest parts of the cutting blades, but this contact can be prevented by offsetting the blade edges in the thickness direction
Solution Approach 1:
The cutting blades feature asymmetric thickness distribution where the thickness gradually increases from the blade edge leading end toward the blade root part. This asymmetry creates a natural offset in the thickness direction between paired blade edges, allowing them to approach for cutting without direct edge-to-edge contact, thus maintaining reliability while preserving cutting effectiveness
Solution Approach 2:
The thicker blade root parts serve as a cushioning buffer before the blade edges reach each other. When the blades approach during cutting, the thicker root portions make contact first, absorbing any potential impact or misalignment forces before they can reach the thinner, more vulnerable blade edges, thereby protecting them from damage
Data Source
AI summary
A cutting apparatus and a cutting blade is capable of restraining a highly-viscous substance from bending while preventing damage to a blade edge part. A pair of the cutting blades are configured for an approaching/separating movement, and the cutting blades are arranged with blade edge parts facing each other while having thickness directions oriented in the same direction. The cutting blades each have a gradually increasing thickness increased from a blade edge leading end toward a blade root part and have blade edge parts that are offset from one another in the thickness direction of the cutting blades. Each of the cutting blades has a surface in the thickness direction made of a material having a hardness lower than the blade edge part of the other cutting blade.