Sand Core Machine Filtration Plate Cleaning

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Solution Overview

Problem

The frequent fouling of filtration plates with sand during the manufacturing of sand cores leads to reduced productivity due to the need for frequent replacements, as suction generates sand adhesion and hardening, which impairs air and suction capacities.

Innovation Solution

Incorporating cleaning means that inject a cleaning agent against the filtration plate after the blowing chamber has left the unloading position, detaching adhered sand and reducing the frequency of filtration plate replacements, thereby increasing productivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stress or pressure

If suction is generated to relieve excess pressure in the molding box, then pressure relief is achieved, but sand adheres to the filtration plate and hardens, reducing its capacity

Engineering Contradiction:

Improveexcess pressure in molding boxVSAvoidfiltration plate capacity

Core Design Contradiction:

Stress or pressureVSProductivity

Solution Approach 1:

The patent converts the harmful effect of suction (which causes sand adhesion) into a beneficial cleaning mechanism by introducing a jet device that uses the same suction system to remove adhered sand from the filtration plate, thereby maintaining its capacity while preserving the pressure relief function

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent introduces a jet device as an intermediary element between the suction system and the filtration plate. This jet device uses a jet of gas or liquid to remove adhered sand, acting as a mediator that prevents the direct harmful interaction between suction and the filtration plate

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the filtration plate is frequently replaced to maintain capacity, then sand adhesion is prevented, but machine productivity is reduced due to replacement time

Engineering Contradiction:

Improvefiltration plate performanceVSAvoidcore manufacture productivity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements a self-service mechanism where the filtration plate cleans itself through the jet device. The system automatically removes adhered sand using a jet of gas or liquid, eliminating the need for manual replacement and maintaining continuous operation

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent ensures continuous operation by maintaining the filtration plate's capacity through automatic cleaning. The useful action of sand removal continues without interruption, preventing the breakdown in productivity that would occur with frequent replacements

Inventive Principle:

Principle #20Continuity of useful action

3Stress or pressure

If sand is suctioned out along with air, then pressure relief is improved, but the filtration plate becomes fouled with adhered sand

Engineering Contradiction:

Improvepressure relief efficiencyVSAvoidsand adhesion to filtration plate

Core Design Contradiction:

Stress or pressureVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful sand adhesion caused by suction into a beneficial cleaning opportunity. The same suction system powers a jet device that uses a jet of gas or liquid to remove adhered sand from the filtration plate, turning the problem into a solution

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

Significantly reduces the need for filtration plate replacements, maintaining machine efficiency and productivity by effectively cleaning the filtration plate after each sand unloading operation.

Implementation Method 1

the blowing assembly is suitable for injecting air through the filtration plate towards the blowing chamber

Methodology Applied

Scientific EffectAir injection:

Implementation Method 2

generating suction for suctioning out at least part of the air that has been injected

Methodology Applied

Scientific EffectSuction: Suction

Implementation Method 3

the gassing element moves to a working position, preferably on the molding box and injects or blows gas towards the molding box in order to harden the core

Methodology Applied

Scientific EffectGas injection:

Implementation Method 4

cleaning means which are suitable for injecting a cleaning agent against said filtration plate once the blowing chamber has left the unloading position, such that the sand adhered to the filtration plate is detached

Methodology Applied

Scientific EffectCleaning agent injection:

Data Source

PatentEP2907601B1Machine and method for manufacturing sand cores

Publication Date: 2019.04.10 LORAMENDI SA

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AI summary

The present invention relates to a machine and method for manufacturing sand cores, the machine (100) comprising a molding box (1), a blowing chamber (2), a gassing element (3) and a blowing assembly (4) which is suitable for injecting air against the blowing chamber (2) and for suctioning it through a filtration plate. The blowing chamber (2) is filled with sand and is arranged in an unloading position between the blowing assembly (4) and the molding box (1) for unloading the sand into the molding box (1); and the gassing element (3) is subsequently arranged between the blowing assembly (4) and the molding box (1). The machine (100) further comprises cleaning means (6) suitable for cleaning the filtration plate once the blowing chamber (2) has left the unloading position.