Extrusion Molding Machine Temperature Control for Ceramic Accuracy
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Solution Overview
Problem
Conventional extrusion molding techniques face challenges in achieving high dimensional accuracy and surface quality of ceramic molded bodies, often resulting in cracking and surface defects due to thermal stress and uneven material flow, which increases production costs and complexity.
Innovation Solution
An extrusion molding machine with two or more temperature controlling members between the screen and die, along with a heat insulating member, allows for precise temperature control to improve dimensional accuracy and surface properties by ensuring uniform material flow and reducing thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional extrusion molding techniques are used, then production can proceed with simple equipment, but dimensional accuracy and surface quality deteriorate due to thermal stress and uneven material flow
Solution Approach 1:
The temperature control system is segmented into multiple independent heating zones along the extrusion path. Each zone can be controlled separately to create different temperature profiles, allowing precise control of material flow and thermal stress distribution, thereby improving dimensional accuracy without requiring a complete system redesign
Solution Approach 2:
Different sections of the extrusion path are provided with different temperature conditions through localized heating zones. This allows specific areas to be optimized for different functions (e.g., higher temperature where material flow is needed, lower temperature where dimensional stability is required), improving overall manufacturing precision while maintaining reasonable equipment complexity
2Manufacturing precision
If conventional extrusion molding techniques are used, then equipment structure remains simple, but surface quality deteriorates due to wrinkles and cracks from thermal stress
Solution Approach 1:
Temperature control is applied in advance during the extrusion process to prevent thermal stress and surface defects before they occur. By controlling the temperature profile ahead of time through multiple heating zones, the material flow and cooling are optimized to prevent wrinkles and cracks, improving surface quality without requiring complex post-processing
Solution Approach 2:
The temperature control system uses feedback from temperature sensors to adjust heating in different zones, maintaining optimal temperature conditions throughout the extrusion process. This prevents thermal stress accumulation that causes surface defects, improving surface quality while keeping the control system manageable through automated regulation
3Manufacturing precision
If uniform temperature control is applied throughout the extrusion path, then material flow can be maintained, but energy consumption increases and thermal stress problems persist
Solution Approach 1:
Instead of uniform temperature control, different heating zones are activated only where and when needed based on local material flow requirements. This localized heating approach maintains necessary temperature gradients for proper material flow and dimensional accuracy while significantly reducing overall energy consumption compared to heating the entire extrusion path uniformly
Solution Approach 2:
The temperature parameters are varied along the extrusion path and over time, with higher temperatures applied only in specific zones where material flow assistance is needed. This dynamic parameter adjustment maintains dimensional accuracy while minimizing energy consumption by avoiding unnecessary heating in other areas
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
The solution enables the production of ceramic molded bodies with enhanced dimensional accuracy and improved surface quality, reducing the occurrence of wrinkles and cracks while minimizing energy consumption and production costs.
Implementation Method 1
two or more temperature controlling members between the screen and the die
Implementation Method 2
a heat insulating member arranged between the two or more temperature controlling members
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: two or more temperature controlling members between the screen and the die; and a heat insulating member arranged between the two or more temperature controlling members.