Injection Shaft Gas Flow Control for High-Viscosity Resin Molding
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Solution Overview
Problem
Conventional injection devices face challenges in accurately controlling the gas supply amount during the compression and dissolution process in the molding material, which affects the injection process in injection molding machines, particularly for difficult-to-mold resins with high viscosity.
Innovation Solution
The injection device incorporates a gas integrated flow measuring device and an injection control system that controls the injection shaft's movement to accurately measure and control the gas supply amount, ensuring precise gas dissolution in the molding material before injection into the mold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If gas is supplied into the injection chamber to compress and dissolve in the molding material, then the viscosity of the molding material is reduced, but the gas supply amount cannot be accurately controlled
Solution Approach 1:
The patent introduces a gas flow measuring device that measures the flow amount of gas supplied into the injection chamber and provides feedback to the control device. The control device then adjusts the gas supply based on this feedback to achieve a predetermined flow amount, thereby enabling accurate control of gas supply amount during the compression and dissolution process.
Solution Approach 2:
The patent replaces conventional mechanical gas supply methods with a controlled gas supply system that uses a gas supply device equipped with a flow measuring device. This substitution enables precise measurement and control of gas flow through electronic control rather than relying solely on mechanical mechanisms.
2Reliability
If the injection shaft is moved backward and forward to compress and dissolve gas in the molding material, then gas dissolution is achieved, but the process lacks precise control over gas supply timing and amount
Solution Approach 1:
The control device receives feedback from the gas flow measuring device and automatically adjusts the gas supply to achieve the predetermined flow amount. This feedback mechanism ensures reliable gas dissolution while maintaining precise automated control over the timing and amount of gas supply during injection shaft movement.
Solution Approach 2:
The control device is configured to supply gas at a predetermined flow amount before the injection shaft moves forward to inject the molding material. This preliminary action ensures that gas dissolution is completed in advance, providing reliable gas incorporation while maintaining precise control over the injection process timing.
3Ease of manufacture
If gas is supplied at high pressure to dissolve in high viscosity resin, then moldability is improved, but the complexity of the gas supply control system increases
Solution Approach 1:
The gas flow measuring device provides feedback to the control device, which automatically adjusts the gas supply to maintain the predetermined flow amount. This feedback control simplifies the overall system by enabling precise control through automated adjustment rather than requiring complex manual control mechanisms, thereby improving moldability while managing system complexity.
Solution Approach 2:
The gas supply device with integrated flow measurement and control capabilities enables the system to self-regulate gas supply automatically. The control device adjusts gas supply based on feedback from the flow measuring device, allowing the system to maintain optimal conditions for dissolving gas in high viscosity resin without requiring external intervention or complex control mechanisms.
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 allows for accurate control of the gas supply amount, enhancing the injection process by reducing viscosity and improving the moldability of difficult-to-mold resins, thereby improving the quality and consistency of the molded products.
Implementation Method 1
a gas is dissolved in the difficult-to-mold resin under high pressure to reduce the viscosity of the difficult-to-mold resin
Implementation Method 2
a gas is dissolved in the difficult-to-mold resin under high pressure to reduce the viscosity
Implementation Method 3
moving the injection shaft backward and forward in the injection chamber to expand and reduce the injection chamber
Implementation Method 4
The gas integrated flow measuring device measures an integrated flow of the gas supplied into the injection chamber
Implementation Method 5
perform a pressure holding process in which the injection driving device moves the injection shaft forward at the predetermined pressure for a predetermined time
Data Source
AI summary
After the injection shaft moves backward and the gas is supplied into the injection chamber, it is desired to accurately control the gas supply amount in the injection device in which the injection shaft is moved forward to compress and dissolve the gas in the molding material in the injection chamber. An injection device of the disclosure supplies a gas into an injection chamber via a gas supply hole which passes through an injection shaft and is opened at a tip surface of the injection shaft. The injection device of the disclosure has at least one seal ring and at least one piston ring aligned in an axial direction on an outer circumferential surface of the injection shaft.