Core Molding Device Collision Portion Binder Adhesion
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Solution Overview
Problem
In existing core molding devices, the foamed admixture directly collides with the cavity surface, causing the binder to adhere in a concentrated and hardened state, leading to demolding failures and potential casting defects.
Innovation Solution
A core molding device configuration with a collision portion formed between the runner and the cavity, where the foamed admixture collides before reaching the cavity, preventing direct contact and incorporating a heating unit controlled by a measurement unit to maintain temperature and prevent binder adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the foamed admixture is directly supplied to the cavity without a collision portion, then the molding process is simple and fast, but the binder adheres in a concentrated and hardened state to the inner surface of the cavity causing demolding failures
Solution Approach 1:
A collision portion is introduced as an intermediary element between the runner and the first cavity portion. This collision portion intercepts the foamed admixture before it reaches the first cavity portion, causing the binder to disperse rather than concentrate on the cavity surface, thereby preventing adhesion issues during demolding.
Solution Approach 2:
The cavity is segmented into distinct functional zones: a second cavity portion for baseboard formation, a collision portion for binder dispersion, and first cavity portions for core body formation. This segmentation allows the foamed admixture to be processed in stages, with the collision portion specifically designed to interrupt direct flow to the core bodies.
2Productivity
If the foamed admixture is supplied at high speed to increase productivity, then the molding cycle is reduced, but the binder adheres more strongly to the cavity surface due to concentrated impact
Solution Approach 1:
The collision portion converts the harmful concentrated impact of high-speed foamed admixture into a beneficial dispersing action. By intentionally designing a controlled collision zone, the high-speed flow is redirected and scattered, transforming the potentially harmful concentrated binder deposition into a beneficial dispersed distribution that prevents adhesion.
3Reliability
If the cavity is heated to maintain temperature stability, then the binder remains pliable and easier to demold, but energy consumption increases and temperature control becomes more complex
Solution Approach 1:
The collision portion performs a preliminary action by dispersing the binder before it reaches the first cavity portions. This preliminary dispersion prevents the binder from adhering in the first place, reducing or eliminating the need for subsequent heating to facilitate demolding, thereby lowering energy consumption.
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
Effectively prevents the binder from adhering to the cavity surface, reducing demolding issues and ensuring the quality of the cast product by scattering the foamed admixture's kinetic energy and maintaining temperature stability at the collision portion.
Implementation Method 1
The core molding device may be further equipped with at least one heating unit that heats the molding die
Implementation Method 2
a measurement unit that is arranged at the at least one collision portion to measure a temperature of the at least one collision portion
Data Source
AI summary
A cavity includes a first cavity portion, and a second cavity portion that is formed between the first cavity portion and a runner and that corresponds to a baseboard. There is adopted a configuration in which a foamed admixture is supplied to the first cavity portion via the second cavity portion upon being supplied to the cavity via the runner. A collision portion with which the foamed admixture supplied to the cavity can collide before reaching the first cavity portion is formed at the second cavity portion.