Sand Core Making Machine Airflow Control
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Solution Overview
Problem
Sand core making machines face inefficiencies in hardening processes due to high energy consumption and complex installations required for achieving optimal air pressure and moisture absorption, leading to increased costs and potential fragility of cores if not properly hardened.
Innovation Solution
A sand core making machine with a specific pressurized air path including a heating unit upstream of the core box, a flowmeter, and a flow regulator to control airflow, allowing for real-time optimization of air flow and temperature for efficient hardening, and an outlet pipe with a flow regulator to manage airflow during the hardening process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pressurized hot air is used to harden the mixture, then the mixture is hardened efficiently through moisture absorption, but energy consumption increases due to the need to heat air to high temperatures
Solution Approach 1:
The patent optimizes the temperature and pressure parameters of the air used for hardening. By controlling air temperature within an optimal range (not excessively high) and maintaining appropriate pressure levels, the system achieves efficient moisture absorption from the mixture while minimizing energy consumption. The heating device adjusts these parameters dynamically during the hardening process.
2Reliability
If pressure regulators are arranged between the pressurized air source and the heating device to assure minimum air pressure, then air reaches the entire mixture properly, but device complexity and cost increase
Solution Approach 1:
The patent extracts and removes the pressure regulator component from the system. Instead of using complex pressure regulation devices to control air pressure, the invention achieves proper air delivery by optimizing the heating device performance and air flow path, eliminating the need for separate pressure control mechanisms while maintaining reliable air delivery to the mixture.
Solution Approach 2:
The system performs self-regulation of air flow and pressure through the heating process itself. The heating device and air flow path are designed to automatically maintain optimal conditions without external pressure regulation, allowing the system to self-adjust based on the hardening process requirements.
3Quantity of substance
If the air path includes multiple heating units in series to increase air temperature, then moisture absorption capacity increases, but energy consumption and installation complexity increase
Solution Approach 1:
The patent segments the heating function into an optimized single heating zone rather than multiple series heating units. By strategically positioning the heating device to create an optimal temperature gradient in the air path, the system achieves sufficient moisture absorption capacity without the energy waste and complexity of multiple heating stages.
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 improves hardening efficiency and core making efficiency by optimizing air flow and temperature, reducing energy consumption, and ensuring consistent core quality without the need for complex pressure regulation, while detecting anomalies to prevent production interruptions.
Implementation Method 1
at least one heating unit arranged in said path upstream of the core box for heating the pressurized air before it reaches said core box
Implementation Method 2
the air used is dry and hot so that it absorbs moisture from the mixture present in the cavity, such that said mixture is hardened
Data Source
AI summary
Apparatus and methods for making a sand core in a core box are provided. According to one embodiment, the method includes introducing into a cavity of the core box a sand-binder mixture, the sand-binder mixture being introduced into the cavity through an inlet conduit of the core box. Pressurized air is then introduced into the cavity while a flow rate of the pressurized air is measured in a first air flow path upstream the core box. A control unit automatically alters the degree of opening of an electronically controlled flow regulator located in a second air flow path located downstream an outlet conduit of the core box depending on the measured flow rate to regulate the flow of pressurized air into the cavity of the core box.