ETPU Slipper Molding Die With Movable Inner Support Release
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Solution Overview
Problem
Existing ETPU sole manufacturing processes have low efficiency and are inefficient for producing slippers, and there is no way to solve the problem of producing slippers completely made of ETPU, as the processing process has low efficiency and is not beneficial for mass production.
Innovation Solution
A molding die and producing method that allows for the entire ETPU slipper to be molded using single foaming and conveniently released, utilizing a movable and fixed die module with movable inner supports that facilitate smooth release and efficient mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional separate molding process is used for soles and uppers, then bonding strength is improved, but production efficiency deteriorates
Solution Approach 1:
The patent combines the separate molding of soles and uppers into a single integrated molding process. The die structure integrates both the sole cavity and upper cavity, allowing ETPU particles to be foamed and molded into complete slippers (sole + upper) in one operation, eliminating the need for separate molding and bonding processes.
Solution Approach 2:
The die is segmented into multiple movable components including the movable die, fixed die, movable inner support, and fixed inner support. This segmentation allows the die to open and close properly while maintaining the integrated molding capability, enabling efficient production without compromising structural integrity.
2Productivity
If single foaming molding is used for complete slippers, then production efficiency is improved, but release difficulty increases
Solution Approach 1:
The patent employs a dynamic die structure where the movable die and movable inner support can move relative to the fixed die and fixed inner support. During molding, the die closes to form the complete slipper; during release, the die opens by moving the movable components outward, allowing easy removal of the molded slippers while maintaining the benefits of single-foam molding.
3Ease of operation
If movable inner support is added to the die, then release smoothness is improved, but device complexity increases
Solution Approach 1:
The movable inner support is designed to move outward along with the movable die during the release phase. This dynamic movement creates clearance between the molded upper and the inner support, enabling smooth release of the slipper without requiring complex additional 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
Enables efficient production of ETPU slippers by allowing for the formation of molding spaces within the die, facilitating smooth release and improving production efficiency through steam pressurization and heating, and ensuring good air permeability without additional processing.
Implementation Method 1
after ETPU particles are subsequently injected into the die cavity, the ETPU slippers can be molded using single foaming by steam pressurization and heating
Implementation Method 2
ETPU is a kind of polyurethane thermoplastic foamed particles which are oval non-crosslinked foamed particles containing micro closed bubbles formed by carrying out pressure and heat treatment on TPU particles
Data Source
AI summary
The present application provides a molding die and processing method of ETPU slippers; the die includes a movable die module and a fixed die module, wherein the movable die module includes a movable die base, a male die fixed on the movable die base and a movable inner support movably arranged in the male die; a first die cavity is formed in a side surface of the male die, a movement channel is formed in an inner bottom wall of the first die cavity, and the movable inner support is movably mounted in the movement channel; the fixed die module includes a fixed die base and a die frame fixed on the fixed die base, and a second die cavity is formed in a side surface of the die frame.