Variable Slot Gatebar for Stable Polyurethane Foam Discharge
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Solution Overview
Problem
Existing gatebar systems for controlling the release of pressure in polyurethane foam production are limited by the need for precise manual adjustment of slot height, which is difficult to maintain and adapt to variations in flow rate and pressure, leading to inconsistent foam quality and increased production downtime.
Innovation Solution
A variable slot gatebar with adjustable slot height controlled by a pressurizing mechanism, allowing automatic adjustment based on pressure and flow rate variations, ensuring consistent foam quality and reducing manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of slot height is used in existing gatebar systems, then the structure is simple, but the manufacturing precision and consistency of foam quality deteriorate due to difficulty in maintaining precise adjustments
Solution Approach 1:
The gatebar slot height is made dynamically adjustable through a positioning mechanism that allows movement between multiple predetermined positions. This enables the system to adapt slot height to varying flow rates and pressure conditions while maintaining precise control, resolving the contradiction between manufacturing precision and device complexity.
Solution Approach 2:
The invention changes the parameter of slot height from fixed to variable by implementing a positioning mechanism with multiple predetermined positions. This allows optimization of foam quality under different operating conditions without requiring complex continuous adjustment systems.
2Adaptability or versatility
If fixed slot height is used, then the device complexity is low, but the adaptability to variations in flow rate and pressure deteriorates, leading to inconsistent foam quality
Solution Approach 1:
The gatebar incorporates a positioning mechanism that enables dynamic adjustment of slot height between multiple predetermined positions. This allows the system to adapt to varying flow rates and pressure conditions, improving versatility without requiring complex continuous adjustment systems.
Solution Approach 2:
The positioning mechanism with multiple predetermined positions provides multi-functionality, allowing the same gatebar structure to handle different operating conditions (varying flow rates and pressures) effectively, thereby improving adaptability without proportionally increasing complexity.
3Productivity
If manual adjustment of slot height is required, then the device complexity is low, but the productivity deteriorates due to increased production downtime for adjustments
Solution Approach 1:
The positioning mechanism allows quick adjustment between predetermined slot height positions, minimizing production downtime when adjustments are needed. This dynamic capability improves productivity by enabling faster response to changing operating conditions compared to fixed slot height systems.
4Ease of operation
If precise manual adjustment is required, then the device complexity is low, but the ease of operation deteriorates due to difficulty in maintaining precise adjustments
Solution Approach 1:
The positioning mechanism provides predefined adjustment positions that are easier to operate than continuous manual adjustment. The mechanism translates rotational movement into precise linear positioning, improving ease of operation while maintaining adjustment precision.
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 variable slot gatebar ensures uniform and precise control of the foam discharge, producing high-quality polyurethane foams with minimal manual operation, adaptable to different formulations and throughput rates, enhancing production efficiency.
Implementation Method 1
The height, or opening, of the slot is automatically adjustable... to control the pressure of the discharging flow
Implementation Method 2
The CO2 can be dispersed and dissolved inside the polyol matrix before it is mixed with the isocyanate to produce polyurethane by reaction
Implementation Method 3
They are released during the reaction due to reduced solubility and increasing of temperature caused by the reaction itself
Implementation Method 4
The reaction of H2O with the isocyanate is forming the so-called 'chemical CO2' that is one of the bases for the foam formation
Implementation Method 5
carbon dioxide is the gas that is developed during the foam growing and that is responsible for the formation of the foam cellulation
Data Source
Figure 1~2
Figure 3~4
Figure 5~6A
AI summary
The present invention relates to a variable slot gatebar (100, 200, 300, 400, 500, 600, 700, 800) for a reactive frothing or foaming system comprising a flat first element (101, 401) and a second element (102, 202, 302) having at least a flow recess (103, 303), the flat first element (101, 401) and the second element (102, 202, 302) being connected at a rear surface (104) of the second element (102, 202, 302) through at least one connecting device (105). The flat first element (101, 401) and the second element (102, 202, 302) are spaced each other by a gap toward a front surface (109) of the second element (102, 202, 302) defining a gatebar slot (110). The flat first element (101, 401) and the second element (102, 202, 302) define an inner gatebar channel (106) at the flow recess (103, 303) of the second element (102, 202, 302). The variable slot gatebar (100, 200, 300, 400, 500, 600, 700, 800) are adapted to release a discharging flow of a chemical reactive blend through said gatebar slot (110). A width of the gatebar slot (110) is automatically adjustable to control a pressure of the discharging flow. The present invention also relates to a frothing or foaming system comprising the variable slot gatebar (100, 200, 300, 400, 500, 600, 700, 800) and a control system.