Nozzle Unit for Reaction Moulding with Dual Jet Switching
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Solution Overview
Problem
Existing nozzle units for reaction moulding machines require complex activation or exchange to implement different spray jets, and additional switching units are needed for dual mixing heads, complicating the process of producing plastic parts with varying nozzles.
Innovation Solution
A nozzle unit with two dispensing nozzles, one for round jet and one for flat jet applications, connected to the same inlet channel via a valve arrangement that allows for easy switching between operating states, eliminating the need for complex switching units by using a single nozzle change module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single dispensing nozzle is used in the nozzle unit, then the structure is simple, but different spray jet configurations (round jet, flat jet) cannot be implemented without exchanging the entire nozzle unit
Solution Approach 1:
The nozzle unit is designed to accommodate multiple dispensing nozzles with different spray jet configurations (round jet nozzle, flat jet nozzle) within a single universal structure. The housing contains multiple nozzle receptacles that can receive different types of dispensing nozzles, allowing the same nozzle unit to perform multiple spray jet functions without requiring separate nozzle units for each configuration.
Solution Approach 2:
Multiple dispensing nozzles are integrated within a single nozzle unit housing, with each nozzle nested in its own receptacle. The nozzles are arranged concentrically or in parallel within the same housing structure, allowing compact integration of multiple spray jet capabilities into one unified component that can be mounted on the mixing head as a single assembly.
2Adaptability or versatility
If two mixing heads with separate dispensing nozzles are used in parallel, then different spray jets can be applied simultaneously, but additional switching units are required to convey reactive mixture to each mixing head
Solution Approach 1:
Multiple dispensing nozzles are combined within a single integrated nozzle unit that receives a single reactive mixture supply. The internal structure of the nozzle unit contains multiple outlet channels that distribute the mixed reactive components to different nozzle types, eliminating the need for separate switching units and multiple independent mixing head systems.
Solution Approach 2:
The nozzle unit serves as a universal distribution system that can simultaneously or alternately supply multiple types of spray jets from a single reactive mixture source, replacing the need for multiple specialized mixing heads and their associated switching mechanisms.
3Reliability
If the nozzle unit is exchanged to implement different spray jets, then the correct nozzle configuration is ensured, but the activation process becomes complicated and time-consuming
Solution Approach 1:
Multiple dispensing nozzles are pre-installed within the nozzle unit housing in designated receptacles, with each nozzle positioned and configured in advance. The reactive mixture supply channels are pre-routed to access each nozzle type, so that when the nozzle unit is mounted on the mixing head, all spray jet configurations are immediately available without requiring time-consuming installation or configuration steps.
Solution Approach 2:
The system enables dynamic switching between different spray jet configurations by selecting which pre-installed dispensing nozzles are activated, rather than physically exchanging entire nozzle units. This allows rapid reconfiguration during operation while maintaining the reliability of having pre-positioned, correctly configured nozzles.
Data Source
AI summary
A nozzle unit for a reaction molding machine, comprising an inlet channel prepared for connection to a mixing head outlet and comprising a first dispensing nozzle, which is prepared for applying a reactive mixture and which is connected to the inlet channel in a first operating state, a second dispensing nozzle being present, which is connected to the inlet channel in a second operating state and which is likewise prepared for applying a reactive mixture. Further disclosed is a mixing head device for a reaction molding machine having the nozzle unit, to a reaction molding machine having the mixing head device, and to a method for producing a plastic part.