Thermoplastic Resin Powder Supply for Clogging and Scattering Control
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Solution Overview
Problem
Powder clogging and scattering occur when supplying powder through a tube, leading to inefficiencies and operational issues.
Innovation Solution
A method is employed where the powder flow rate and tube cross-sectional area are controlled to satisfy the expression 1.5≤(M/AS)≤135, with specific angles and positioning of the tube ends, to suppress clogging and scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If powder is supplied through a tube at high flow rates, then productivity is improved, but powder clogging occurs and reliability deteriorates
Solution Approach 1:
The invention changes the physical parameters of the tube (inner diameter, length, material) and adjusts operational parameters (supply flow rate, tube inclination angle) to optimize powder flow. Specifically, the tube inner diameter is set to 6-12mm, length to 300-600mm, and inclination angle to 30-60 degrees, which resolves the contradiction between high flow rate and clogging prevention
2Productivity
If powder is supplied at high velocity, then productivity is improved, but powder scattering increases and loss of substance worsens
Solution Approach 1:
The tube acts as an intermediary that guides and controls powder flow from the supply point to the container. By optimizing the tube's physical dimensions and inclination angle, the powder is channeled smoothly, preventing scattering while maintaining high supply speed. The tube serves as a mediator between the powder source and destination, resolving the contradiction between speed and scattering
3Quantity of substance
If tube cross-sectional area is increased, then powder flow capacity is improved, but device complexity increases
Solution Approach 1:
The invention establishes specific parameter ranges for the tube (inner diameter 6-12mm, length 300-600mm) that optimize powder flow capacity without excessive complexity. These standardized dimensions provide sufficient flow capacity while maintaining simple, manufacturable tube specifications, resolving the contradiction between quantity and complexity
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 method effectively reduces powder scattering and clogging, ensuring stable and efficient powder supply to containers like hoppers, minimizing losses and enabling controlled composition of thermoplastic resin.
Implementation Method 1
causing a powder supplied from a top end of a tube to flow down within the tube and be discharged from a bottom end of the tube
Data Source
AI summary
A powder supply method for causing a powder supplied from a top end 70t of a tube 70 to flow down within the tube 70 and be discharged from a bottom end 70b of the tube, in which if M [kg/s] is a supply flow rate of the powder and AS [m2] is a cross-sectional area of the bottom end 70b of the tube 70, the following expression is satisfied.1.5≤(M/AS)≤135