Velour Brake Element for Folding Machine Signatures
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Solution Overview
Problem
Existing brake devices in folding machines suffer from wear and tear of brake brushes, leading to reduced service life, potential damage to the substrate surface, and electrostatic charging during deceleration, while also lacking uniformity and reproducibility in braking operations.
Innovation Solution
A brake element with a base body having an active surface partially covered with velour, which has a thickness of 1.5 to 8 millimeters and a material composition of 55% to 80% polyamide, 10% to 45% polyethersulfone, and 0% to 15% epichlorohydrin rubber, providing a detachable velor trimming that minimizes surface damage and electrostatic charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brake brushes are used to brake signatures, then braking function is achieved, but the brushes are subject to wear and have reduced service life
Solution Approach 1:
The patent changes the material parameters of the brake brush trimming from conventional brush materials to velour material with specific properties (thickness: 1.5-8mm, basis weight: 340g/m², material composition: 55-80% polyamide, 10-45% polyethersulfone, 0-15% epichlorohydrin rubber). These parameter changes result in a material that maintains braking function while significantly reducing wear and extending service life.
Solution Approach 2:
The patent uses composite material construction by combining velour material with a base body to create the brake element. The velour material itself is a composite consisting of multiple fibers (polyamide, polyethersulfone, and epichlorohydrin rubber) that work together to provide both braking performance and wear resistance.
2Force
If brake brushes are used to brake signatures, then deceleration is achieved, but damage to substrate surface and electrostatic charging occur
Solution Approach 1:
The patent changes the surface properties and material composition parameters of the braking surface from conventional brush materials to velour material with specific characteristics (thickness, basis weight, fiber composition). These parameter changes enable the material to provide necessary deceleration force while being gentler on the substrate surface and reducing electrostatic charging.
Solution Approach 2:
The velour trimming is designed as a consumable component that can be easily replaced. The base body with the velour trimming attached creates a brake element that, while more durable than conventional brushes, is still intended to be replaced periodically. This approach allows for continuous optimization of the material properties to balance performance and harm reduction.
3Reliability
If brake brushes are used in folding machines, then braking function is provided, but uniformity and reproducibility of braking operations are not ensured
Solution Approach 1:
The patent standardizes the parameters of the velour material (thickness: 1.5-8mm, basis weight: 340g/m², specific material composition ratios) to ensure consistent braking characteristics. This parameter standardization, combined with the structured base body design, ensures uniform and reproducible braking operations across different signatures and operating conditions.
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 velour brake element ensures a long service life, prevents damage to the substrate surface, and achieves high uniformity and reproducibility in braking operations by applying a controlled deceleration force without causing electrostatic charging.
Implementation Method 1
the brake element (20) with its active surface (22) at least partially with the signature (10) is in operative connection
Data Source
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AI summary
The invention is based on the objective of creating a solution that enables a long service life of the signature while simultaneously ensuring that the sheet surface is not damaged and electrostatic charging is prevented. This objective is achieved by the fact that the braking element according to the invention comprises a base body with an effective surface, wherein, for slowing down and/or braking and/or guiding and/or holding down a signature, the braking element is at least partially in operative contact with the signature via its effective surface, and wherein the effective surface has a velour covering.