Folding Cylinder Insert with Curved Base Body
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Solution Overview
Problem
The cover strip of existing inserts for jaw cylinders in printing presses detaches from the base body during operation, leading to malfunctions due to stress buildup when the base body is inserted into the outer peripheral groove.
Innovation Solution
The insert features a base body curved in the shape of a circular arc, with the cover strip joined to the curved upper side, eliminating the need for deformation and thus reducing stress on the joint, and optionally includes support ribs for increased strength and a higher hardness elastomer for the cover strip to enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the base body is inserted into the outer groove of the folding cylinder, then the insert provides the necessary pressure between the folding cylinder and folding knife cylinder, but stress builds up at the joint between the base body and cover strip causing the cover strip to detach
Solution Approach 1:
The base body is pre-curved in the shape of a circular arc before insertion into the groove. This preliminary shaping ensures that when the base body is inserted, it already matches the curvature of the groove, preventing stress buildup at the joint between the base body and cover strip during insertion and operation.
Solution Approach 2:
The base body is designed with a circular arc curvature that matches the outer groove of the folding cylinder. This curved geometry allows the base body to conform to the groove shape, distributing stresses evenly and preventing detachment of the cover strip while maintaining the necessary pressure between the folding cylinder and folding knife cylinder.
2Stability of the object's composition
If the cover strip is attached to the top surface of the base body, then the insert provides a complete covering structure, but the cover strip detaches during operation due to stress from base body deformation
Solution Approach 1:
The base body is pre-curved to match the groove geometry before the cover strip is attached. This preliminary action ensures that the base body will not deform after attachment, maintaining the integrity of the complete insert structure while preventing cover strip detachment during operation.
Solution Approach 2:
The circular arc curvature of the base body matches the outer groove, allowing the cover strip to be attached to a pre-shaped surface that will not deform during insertion and operation. This maintains the complete covering structure while ensuring reliable attachment.
3Strength
If the base body is made rigid to maintain shape, then the insert provides stable pressure, but the base body cannot conform to the groove shape causing stress and cover strip detachment
Solution Approach 1:
The base body is designed with a circular arc curvature that matches the outer groove of the folding cylinder. This curved geometry allows the base body to conform to the groove shape while maintaining structural stability and providing stable pressure between the folding cylinder and folding knife cylinder.
Solution Approach 2:
The base body is pre-curved to match the groove geometry, changing its shape parameter before insertion. This pre-shaping allows the base body to conform to the groove while maintaining rigidity and stable pressure, preventing stress buildup and cover strip detachment.
Data Source
Figure 1~2
Figure 3~4
AI summary
Insert for a folding cylinder and method for manufacturing an insert for a folding cylinder, wherein the insert has a strip-shaped base body (10) with a total length and a base cross-section (11) for insertion into a groove of the folding cylinder and a cover strip (30) which is joined to a top surface (12) of the base body and a length such that the cover strip extends over a partial length of the base body and has a width in the region of its length such that the cover strip projects laterally beyond the base cross-section on both sides in the region of the partial length by an overhang dimension, wherein the cover strip and base body are each formed from an elastic material.To prevent the cover strip from detaching from the base body, the base body is curved over its entire length in the shape of a circular arc, so that its top surface is arranged radially outside the circular arc and is curved along the base body, with the cover strip being attached to the curved top surface of the base body.