Knife Ring Chipping Apparatus with Punctiform Reference Surface
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Solution Overview
Problem
Conventional chipping devices with knife ring systems face issues due to production tolerances, resulting in uneven blade projections and inferior chip quality, limiting the usable width of slicing knives and their lifespan.
Innovation Solution
Designing a knife carrier with a punctiform reference surface and recesses for slicing knives, allowing the rearward edge of the knives to extend beyond the reference surface, enabling wider knives and adjustable configurations for improved alignment and stability, which also facilitates a more compact design and higher chipping output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a continuous reference surface is used on the knife carrier, then the blade projection can be controlled, but the usable width of the slicing knife is limited by the distance between the blade and the reference surface
Solution Approach 1:
The reference surface function is extracted from a continuous surface and concentrated into a punctiform element (the groove at the rearward end of the knife carrier). This allows the reference point for blade projection control to be separated from the constraints of a continuous surface, enabling wider knives to be used while maintaining precise blade projection control through the groove position.
2Measurement precision
If the reference surface is positioned at the rearward end of the knife carrier, then blade projection can be controlled, but the knife carrier construction becomes less compact and fewer knife carriers can be accommodated
Solution Approach 1:
The reference surface is transformed from a two-dimensional continuous area into a one-dimensional groove feature at the rearward end. This dimensional reduction allows the reference function to be concentrated in a compact form that does not excessively increase the knife carrier footprint, enabling better space utilization while maintaining blade projection control.
Data Source
AI summary
An apparatus for comminuting materials includes a rotating or stationary ring of knives that is arranged around a chipping chamber. The ring of knives is has a plurality of knife carriers, which are distributed around the knife ring axis in a circular shape, each knife carrier having a bearing surface. The bearing surface is a receptacle for a knife package that is comprised of a knife retaining plate and a slicing knife, and which is held in an operational position at a predetermined angle and a predetermined blade projection by fasteners. The knife carrier has a reference surface, which interacts with the knife package, and based on which the blade projection is determined. The slicing knife has at least one recess that originates in a rearward longitudinal edge, whereby the reference surface is arranged on the projection inside the recess, the projection extending vertically to the bearing surface.