Lactam Polymerization Device with Liquid Initiator Dosing
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Solution Overview
Problem
Current methods for polymerizing lactams in molds face challenges such as difficulty in melting and dosing solid initiators and activators at high temperatures, precise temperature control requirements, and issues with conventional gear pumps due to temperature-dependent viscosities, leading to inefficiencies and blockages in dosing systems.
Innovation Solution
A device that independently feeds and doses lactam, initiator, and activator to a mixing head, with all components being liquid at room temperature, using a heated reservoir and dosing system to maintain constant temperature, and a static mixer for precise mixing, reducing the complexity of thermal elements and allowing for more accurate dosing through software-controlled parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid initiators and activators are melted and dosed at high temperatures, then the polymerization process can be carried out, but the dosing system becomes complex and prone to blockages
Solution Approach 1:
The patent changes the physical state parameter of the initiators and activators from solid to liquid at room temperature. This parameter change eliminates the need for heating and melting systems, thereby reducing device complexity and improving dosing reliability by avoiding temperature-dependent viscosity issues and blockages
Solution Approach 2:
The patent extracts the heating and melting functions from the dosing system. By using liquid initiators and activators at room temperature, the complex thermal management system (heaters, temperature control, melting mechanisms) is completely removed, simplifying the overall device
2Measurement precision
If conventional gear pumps are used for dosing, then the components can be fed, but precise dosing is difficult due to temperature-dependent viscosities
Solution Approach 1:
The patent changes the temperature parameter to room temperature for the liquid initiators and activators. This eliminates temperature-dependent viscosity variations, enabling precise dosing with conventional gear pumps and significantly improving ease of operation without requiring complex temperature control systems
Solution Approach 2:
The patent implements software-controlled dosing parameters that can precisely control the dosing process. By using liquid materials at room temperature with stable viscosities, the system can accurately measure and dose each component in the correct percentages through software control
3Temperature
If individual heating systems are used for each dosing element, then temperature can be maintained, but cold areas form at connection points causing blockages
Solution Approach 1:
The patent completely removes the individual heating systems from each dosing element. By using liquid initiators and activators at room temperature, the entire thermal management infrastructure (heaters, temperature control systems, insulation) is extracted from the device, eliminating cold areas and connection point blockages
Solution Approach 2:
The patent merges the temperature condition for all dosing elements to room temperature instead of maintaining different high temperatures. This unification eliminates temperature gradients and cold areas at connection points, preventing blockages and improving system reliability
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
Simplifies the polymerization process, reduces the number of device components, and enables more precise dosing of each component, improving the efficiency and accuracy of lactam polymerization in molds by maintaining stable temperatures and avoiding blockages.
Implementation Method 1
a reservoir for storing lactam, wherein said reservoir is kept at a temperature which varies in the range of 135-150°C for melting the lactam and keeping it in melted state
Implementation Method 2
The cited reservoir and lactam feeding means are located within a heater configured to maintain the temperature of the lactam at a substantially constant value until it reaches the mixing head
Data Source
Figure 1
Figure 2
AI summary
A device (10) for polymerizing lactams in molds, comprising: a reservoir (20) for storing lactam, wherein said reservoir (20) is kept at a temperature which varies in the range of 135-150ºC for melting the lactam and keeping it in melted state; lactam feeding means comprising dosing pipes for feeding the lactam from the reservoir (20), first dosing means (30) for feeding an initiator; second dosing means (40) for feeding an activator; a mixing head (50) configured to receive the lactam, the initiator and the activator from respectively said lactam feeding means, said first dosing means (30) and said second dosing means (40), the mixing head (50) having three independent inlets for independently receiving the lactam, the initiator and the activator, to allow said lactam, initiator and activator respectively flow within the mixing head (50) without mixing each other until the output of the mixing head (50) is reached; and a mixing pipe (51) located at the output of said mixing head (50) and configured to put the lactam, initiator and activator in contact for the first time, in such a way that they are mixed up.The initiator and activator are liquid, and the cited reservoir (20) and lactam feeding means are located within a heater (21) configured to maintain the temperature of the lactam at a substantially constant value until it reaches the mixing head (50).