Shear Press Jaw Geometry for Wider Scrap Compaction Channels
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Solution Overview
Problem
Current shear press designs are limited by the geometry of the jaws, which restrict the maximum width of the compaction channel, preventing the processing of larger scrap materials without extensive redesign.
Innovation Solution
The jaws' operating surfaces are redesigned with a cross-sectional geometry that includes a first rectilinear stretch parallel to the scrap's advance direction and an aligned extreme point, allowing the maximum width to be increased without modifying the angular stroke or length of the jaws, and optionally featuring a concave profile for enhanced compaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the degree of inclination of the rectilinear stretches is increased to increase the maximum width of the compaction channel, then the maximum width can be increased, but the jaws will push the scrap back along the compaction channel instead of pressing it
Solution Approach 1:
The operating surface of the jaw is divided into two distinct zones with different functions: a first rectilinear stretch parallel to the advance direction for pressing scrap, and a second rectilinear stretch inclined at an angle to guide scrap flow. This local differentiation allows the jaw to perform both compaction and guidance functions simultaneously, resolving the contradiction between increasing channel width and preventing scrap pushback.
Solution Approach 2:
The invention transitions from a single inclined rectilinear stretch to a two-dimensional cross-sectional geometry comprising two rectilinear stretches at different orientations. This dimensional change allows the jaw to achieve both width expansion and scrap flow control through the coordinated action of the parallel and inclined stretches.
2Area of stationary object
If the length of the jaws or the distance between their distal end and the axis of rotation is increased to increase the maximum width of the compaction channel, then the maximum width can be increased, but this would require an extensive redesign and modification of the whole shear press
Solution Approach 1:
The invention changes the geometric parameters of the jaw's operating surface cross-section, specifically introducing a two-stretch configuration with different orientations, rather than changing the overall jaw length or rotation radius. This parameter change achieves width increase without affecting the fundamental dimensions of the shear press system.
Solution Approach 2:
The operating surface cross-section is segmented into two distinct rectilinear stretches with different functions: one for pressing (parallel to advance direction) and one for guiding (inclined). This segmentation allows independent optimization of each function without requiring overall jaw redesign.
3Reliability
If the degree of inclination is limited to avoid pushing scrap back, then the maximum width of the compaction channel is limited, but this limits the maximum dimensions of the scrap that can be treated
Solution Approach 1:
Different zones of the jaw's operating surface are assigned different functional qualities: the first rectilinear stretch provides pressing action parallel to scrap motion, while the second inclined stretch provides guidance. This local quality differentiation enables the jaw to handle larger scrap dimensions without compromising pressing effectiveness.
Solution Approach 2:
The jaw's operating surface serves multiple functions simultaneously through its two-stretch geometry: it presses scrap during compaction, guides scrap flow during insertion and extraction, and maintains structural integrity. This multi-functionality increases adaptability to various scrap sizes without sacrificing reliability.
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
This design allows for a greater maximum width of the compaction channel, enabling the processing of larger scrap materials without altering the existing shear press structure, while maintaining effective compaction and scrap flow.
Implementation Method 1
the compaction channel may be inferiorly delimited by an inclined bottom plane, which is adapted to define a sort of slide that allows the scrap to slide downwards simply by the effect of gravity
Implementation Method 2
these jaws are both articulated to the machine body according to rotation axes parallel and orthogonal to the advance direction of the scrap and are actuated in rotation, typically through corresponding hydraulic jacks
Data Source
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AI summary
A shear press (100) for scrap comprising a machine body (105) defining a compaction channel (125) adapted to contain the scrap and guide it in a sliding manner along a predetermined advance direction (A), compaction means (155) and cutting means (180); wherein the compaction means (155) comprise: two mutually opposed jaws (170) articulated to the machine body (105) according to axes of rotation (B) parallel to each other and orthogonal to the advance direction (A) of the scrap, and actuating members (175) adapted to rotate said jaws (170) around the respective axes of rotation (B), in opposite directions, between an open configuration and a closed configuration, thereby reducing the space between the two jaws (170); wherein each jaw (170) comprises an operating surface (400) adapted to laterally de-limit the compaction channel (125) when the jaw (170) is in open configuration; wherein the cross section of said operating surface (400), carried out with respect to a section plane orthogonal to the axis of rotation (B), comprises an end (405) proximal to the axis of rotation (B), an end (410) distal from the axis of rotation (B) and at least one first rectilinear stretch (415) that is parallel to the advance direction (A) of the scrap when the jaw (170) is in the closed configuration, and wherein the extreme point (420) of said first rectilinear stretch (415) with respect to the axis of rotation (B) of the jaw (170) does not coincide with the distal end (410) of the cross section of the operating surface (400) but is aligned to the latter along a direction of alignment (C) which forms, with said first rectilinear stretch (415), an angle (α) having its vertex facing the inner part of the compaction channel (125).