Core Molding Method and Device for Preventing Sand Adhesion
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Solution Overview
Problem
In core molding devices, the heat from the metal mold is transferred to the mulled sand, causing the mold temperature to decrease, leading to longer baking times at lower temperatures, which can result in the core sticking to the mold and potential molding failures.
Innovation Solution
A method and device where the metal mold is heated to a temperature higher than the baking temperature before pressure-feeding the mulled sand, and the temperature is maintained at the baking temperature during the molding process to prevent temperature drops, ensuring the core is removed without sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the metal mold is heated to baking temperature before pressure-feeding mulled sand, then the core molding quality is improved, but the heating time and energy consumption increase
Solution Approach 1:
The metal mold is heated to a temperature higher than the baking temperature of the mulled sand before the mulled sand is pressure-fed into the mold. This preliminary heating action ensures that when the mulled sand contacts the mold, the temperature difference is minimized, preventing core sticking and improving molding quality without requiring prolonged heating at exact baking temperature
Solution Approach 2:
The invention changes the temperature parameter of the metal mold from exactly baking temperature to a higher temperature before pressure-feeding. By adjusting the mold temperature to be higher than the baking temperature of the mulled sand, the system prevents heat absorption during pressure-feeding that would otherwise cause temperature drops and core sticking
2Reliability
If the metal mold temperature is maintained at baking temperature during pressure-feeding, then core sticking is prevented, but the temperature control complexity increases
Solution Approach 1:
The metal mold is pre-heated to a temperature higher than the baking temperature before the mulled sand is pressure-fed. This preliminary action anticipates the heat absorption that will occur during pressure-feeding, ensuring the mold temperature remains sufficient to prevent core sticking without requiring complex real-time temperature adjustment during the process
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 approach reduces the time the mulled sand is baked at a lower temperature, preventing core sticking and improving molding success by maintaining optimal temperature conditions.
Implementation Method 1
a step of heating the metal mold such that the temperature of the metal mold reaches a temperature higher than a predetermined baking temperature
Implementation Method 2
when mulled sand is pressure-fed into the metal mold, the heat of the metal mold is taken away by the mulled sand, so that the temperature of the metal mold decreases
Implementation Method 3
a step of holding the temperature of the metal mold having been pressure-fed with the mulled sand at the baking temperature
Data Source
AI summary
A core molding method is a method of molding a core using a metal mold that is pressure-fed with mulled sand, and includes heating the metal mold such that the temperature of the metal mold reaches a temperature higher than a predetermined baking temperature, pressure-feeding the heated metal mold with the mulled sand, holding the temperature of the metal mold having been pressure-fed with the mulled sand at the baking temperature, and removing the core from the metal mold after the holding.