Injection Valve Cleaning Path for Continuous Foam Molding
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Solution Overview
Problem
Residues accumulate within injection molding systems, affecting product quality and increasing maintenance requirements and downtime.
Innovation Solution
An injection molding system with a cleaning mechanism for the fluid supply unit, including a control valve and actuating device to direct blowing agent for cleaning the injection valve, allowing for easy and automated residue removal without system disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the injection molding system operates continuously without cleaning, then productivity is maintained, but residues accumulate leading to product defects and increased maintenance requirements
Solution Approach 1:
The system performs cleaning action in advance by directing blowing agent through the injection valve before residue accumulation causes defects. The control valve is actuated to divert the blowing agent through the cleaning path, removing residues proactively while maintaining continuous production operation.
2Reliability
If the system is stopped for manual cleaning, then product quality is maintained, but productivity decreases due to downtime
Solution Approach 1:
The injection molding system performs self-cleaning by utilizing its own blowing agent and control mechanisms. The control valve automatically directs the blowing agent through the injection valve to clean residues, enabling the system to maintain itself without external intervention or production stoppage.
Solution Approach 2:
The cleaning operation is integrated into the continuous production cycle. The control valve can be actuated at appropriate intervals without stopping the injection molding process, ensuring both product quality maintenance and continuous productivity through uninterrupted operation.
3Ease of operation
If a cleaning mechanism is added to the fluid supply unit, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The control valve serves dual functions: directing blowing agent to the injection valve for normal operation and diverting it through the cleaning path for maintenance. This multi-functionality eliminates the need for separate cleaning equipment, achieving automated cleaning while minimizing additional structural complexity.
Solution Approach 2:
The control valve acts as an intermediary device that routes the blowing agent through different paths based on operational needs. By using the existing blowing agent as a cleaning medium and the control valve as a routing intermediary, the system achieves automated cleaning functionality with minimal added 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
Facilitates effective cleaning of the injection valve, preventing fluid leakage and reducing maintenance needs, thereby maintaining system performance and productivity.
Implementation Method 1
The blowing agent is flowable to the injection valve through the second passage, the third passage and the control valve
Data Source
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AI summary
An injection molding system (100a) is provided. A mixing unit (103) is configured to mix a flowable polymeric material with a blowing agent to form a mixture. A fluid supply unit (102) is configured to provide the blowing agent to the mixing unit (103). The fluid supply unit (102) includes an injection outlet coupled to the mixing unit, a compressor (108) configured to generate the blowing agent, an injection valve (110) disposed between the injection outlet and the compressor and configured to receive the blowing agent from the compressor through a first passage (118), and a cleaning mechanism (200) configured to clean the injection valve. The cleaning mechanism includes a control valve (111) coupled to the compressor through a second passage (119) and coupled to the injection valve (110) through a third passage (113) connected to the first passage, and an actuating device configured to actuate the control valve. The blowing agent is flowable to the injection valve through the control valve.