Circumferential Temperature Control for Ceramic Extrusion Accuracy
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Solution Overview
Problem
Extrusion molding machines face challenges in achieving high dimensional accuracy of the outer circumference portion of ceramic molded bodies, particularly those with deformed cross-sectional shapes, due to thermal stress and mechanical control limitations.
Innovation Solution
An extrusion molding machine with a first temperature controlling member comprising multiple zones divided in the circumferential direction, allowing individual temperature control between the screen and die, which is used in conjunction with a method involving temperature distribution measurement and dimension measurement to determine and adjust zone temperatures for precise molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a bow deflector device is used to mechanically control the flow of molding material, then the dimensional accuracy of the outer circumference portion may be ensured, but the device complexity increases and the flow rate of molding material is easily changed resulting in clogging
Solution Approach 1:
The patent replaces the mechanical bow deflector device with a temperature controlling member that uses thermal fields to control the flow of molding material. This substitution eliminates the mechanical complexity of the deflector device while achieving the same goal of controlling material flow to ensure dimensional accuracy of the outer circumference portion.
Solution Approach 2:
The patent changes the control parameter from mechanical position (bow deflector) to temperature distribution (temperature controlling member). By individually controlling temperatures in different circumferential zones, the system regulates material flow rate and viscosity to prevent clogging and ensure dimensional accuracy without mechanical intervention.
2Manufacturing precision
If the flow rate of molding material is changed by mechanical control, then the dimensional accuracy may be adjusted, but clogging occurs due to unstable flow
Solution Approach 1:
The patent uses temperature as a control parameter to regulate material flow. By adjusting the temperature in different circumferential zones of the temperature controlling member, the system optimizes material viscosity and flow rate to achieve dimensional accuracy while maintaining stable flow and preventing clogging.
Solution Approach 2:
The patent implements a feedback control system that measures the actual flow rate and temperature distribution, then adjusts the temperature controlling member accordingly. This closed-loop control ensures stable material flow and prevents clogging while maintaining dimensional accuracy of the molded body.
3Manufacturing precision
If individual temperature zones are controlled, then the dimensional accuracy of the outer circumference portion is improved, but the device complexity and energy consumption increase
Solution Approach 1:
The patent applies local quality control by dividing the temperature controlling member into multiple circumferential zones that can be independently controlled. Each zone receives customized temperature control based on the specific flow requirements at that location, improving dimensional accuracy while avoiding unnecessary energy consumption in areas that do not require adjustment.
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 enables the production of ceramic molded bodies with improved dimensional accuracy of the outer circumference portion, effectively addressing the limitations of mechanical control methods by finely regulating the temperature distribution during the molding process.
Implementation Method 1
at least one first temperature controlling member between the screen and the die, the first temperature controlling member comprising a plurality of first zones divided in a circumferential direction, wherein temperatures of the plurality of first zones can be individually controlled
Data Source
AI summary
An extrusion molding machine includes: a molding portion having one end and other end, the one end having a die, the other end being connected to an extrusion port of an extrusion portion, the molding portion also including a screen arranged therein. The molding portion includes: at least one first temperature controlling member between the screen and the die, the first temperature controlling member including a plurality of first zones divided in a circumferential direction. Temperatures of the plurality of first zones can be individually controlled.