Stripping Means Positioning for Material Separation

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Solution Overview

Problem

Existing separation apparatuses for materials of different flowability, such as those used in the food industry for removing stones from dates, suffer from contamination of fruit flesh, reduced yield, and machine wear due to the differential speed between the compression belt and hollow drum, causing stones to be rubbed and residual flow to adhere, making separation inefficient and difficult.

Innovation Solution

The stripping means is positioned at the product intake wedge, allowing residual flow to be detached and mixed with new product flow, reducing material transfer from stones, and is designed with a single blade for easy cleaning and adjustable distance to accommodate various products, along with food-grade oil application to prevent sugar deposition and reduce friction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the compression belt and hollow drum rotate at differential speeds to separate materials, then separation effectiveness is improved, but stones are rubbed and residual flow adheres, causing contamination and reduced yield

Engineering Contradiction:

Improveseparation effectivenessVSAvoidcontamination and material transfer

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent inverts the conventional stripping location from the product output region to the product input region. The stripping means is now positioned where material enters the separation zone, allowing residual flow to be removed before it can adhere to stones and cause contamination during the separation process. This reverse positioning eliminates the harmful rubbing and material transfer while maintaining effective separation.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If stripping means is positioned in the product output region, then residual flow can be removed, but machine parts wear quickly due to repeated rubbing of stones

Engineering Contradiction:

Improveresidual flow removalVSAvoidmachine part service life

Core Design Contradiction:

Ease of operationVSDuration of action of stationary object

Solution Approach 1:

The patent applies preliminary action by positioning the stripping means at the product input region, where it removes residual flow before the material enters the separation zone. This preliminary removal prevents stones from accumulating adhered material that would otherwise be rubbed during separation, thereby reducing wear on machine parts and extending their service life while maintaining effective residual flow removal.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If compression pressure is increased to improve separation, then more material is pressed through perforations, but friction increases causing machine wear and heat generation

Engineering Contradiction:

Improvematerial throughputVSAvoidfriction and wear

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces food-grade oil as an intermediary substance between the compression belt and the material being separated. This oil layer reduces direct friction and contact between the compression belt and the product, thereby reducing wear on machine parts and heat generation while still allowing sufficient compression pressure to be applied to press material through the perforations for effective separation.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 configuration enhances the separation of materials by reducing contamination, improving yield, and extending the service life of machine parts by ensuring gentle and effective separation of mixed materials, particularly in the removal of stones from dates, while allowing stones to be easily carried away and fruit pulp to be detached effectively.

Implementation Method 1

a hollow drum (15) which is or can be driven rotationally and has a perforated peripheral surface (M)

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

the materials to be separated, that is, the material to be compressed or separated, are pressed against the perforated peripheral surface of the hollow drum from the outside by means of the endless compression belt

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Implementation Method 3

food-grade oil application to prevent sugar deposition and reduce friction

Methodology Applied

Scientific EffectLubrication: Lubrication

Data Source

PatentUS8689682B2Device for separating materials of varying flowability that are mixed together

Publication Date: 2014.04.08 NORDISCHER MASCHINENBAU RUD BAADER GMBH CO KG

AI summary

The invention relates to an apparatus for separating materials of different flowability that are mixed together, comprising a housing having side walls, a hollow drum driven rotationally and mounted on the side walls and having a perforated peripheral surface M, an endless compression belt that can be pressed against the peripheral surface M from the outside, wrapping around a portion of the circumference of the hollow drum, a product intake wedge for feeding a product flow, a supporting apparatus for the compression belt having at least one support element disposed on the side of the compression belt opposite the hollow drum, and a stripping means for stripping off the compressed material from the hollow drum, which is distinguished in that the stripping means is disposed in the area of the product intake wedge.