Floating Gate Insert for Injection Mold Assembly
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Solution Overview
Problem
In injection molding systems, the need to cool nozzle assemblies containing still-hot molten resin before replacing cavity inserts hinders the efficiency of mold assembly changes, leading to increased downtime and wear on components.
Innovation Solution
A floating gate insert system that retains the nozzle assembly, allowing for the independent removal of cavity inserts without exposing the nozzle assemblies to air, thus enabling quicker exchange and reducing thermal stress on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cavity inserts are removed for mold changes, then flexibility and adaptability of the molding assembly is improved, but the nozzle assemblies containing hot molten resin must be cooled first which increases downtime
Solution Approach 1:
The gate insert is separated into two independent parts: a gate insert body that remains fixed in the cavity plate, and a gate insert tip that can be independently removed. This segmentation allows the gate insert tip to be detached and the cavity insert removed without requiring the nozzle assembly to be cooled, thus maintaining flexibility while reducing downtime.
Solution Approach 2:
The gate insert tip is extracted as a separate removable component from the gate insert body. This extraction enables the tip to be removed independently, allowing cavity insert changes to proceed without waiting for nozzle cooling, thereby resolving the time loss contradiction.
2Productivity
If cavity inserts are removed quickly for efficiency, then productivity is improved, but wear on gate and taper inserts increases
Solution Approach 1:
By segmenting the gate insert into a body and tip, the wear-prone tip can be independently replaced without affecting the main gate insert body and taper insert. This allows frequent tip changes for productivity while preserving the longevity of other components, thus resolving the contradiction between productivity and reliability.
Solution Approach 2:
The gate insert tip is designed as a consumable component that can be frequently replaced at low cost. This allows rapid replacement to maintain productivity while the more expensive gate insert body and taper insert remain in service longer, reducing overall wear impact.
3Ease of operation
If nozzle assemblies are exposed to air during insert removal, then ease of operation is improved, but thermal stress on components increases
Solution Approach 1:
The gate insert tip is extracted as a separate component that can be removed independently. This allows the tip to be taken out first, creating access for cavity insert removal while the nozzle remains covered by the gate insert body, thus maintaining ease of operation while protecting against thermal stress.
Solution Approach 2:
The gate insert body acts as an intermediary protective element that remains in place during tip removal and cavity insert changes. This intermediary structure allows operational ease while continuously protecting the nozzle assembly from thermal shock by preventing direct air exposure.
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 solution reduces downtime during mold changes, enhances cooling efficiency, and minimizes wear on gate and taper inserts by maintaining the nozzle assemblies under fluid coverage, thereby improving operational efficiency and extending the life of components.
Implementation Method 1
cooling channels 30 are typically provided in the cavity and gate inserts 14 and 22. A cooling fluid, such as water, is circulated through the cooling channels 30
Implementation Method 2
A floating gate insert system that retains the nozzle assembly, allowing for the independent removal of cavity inserts without exposing the nozzle assemblies to air, thus enabling quicker exchange and reducing thermal stress on components
Data Source
AI summary
An injection molding machine is provided, including a nozzle assembly having a channel for conveying a fluid. At least one cavity insert is removably mounted within a cavity plate, the at least one cavity insert defining a mold cavity, and a first portion of a gate for communicating the fluid between the nozzle assembly and the mold cavity. A gate insert defines a receptacle for the nozzle assembly, and further defining a second portion of the gate. The gate insert is floatably retained between the nozzle assembly and the at least one cavity insert. Preferably, the gate insert is retained by a gate insert plate that is disposed between the cavity plate and the nozzle assembly.