Molding Tool Segmentation for Gripping Element Demolding
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Solution Overview
Problem
Current molding tools face challenges in facilitating the demolding of opening devices, particularly the gripping elements, which can be difficult to remove due to their design within a single mold cavity.
Innovation Solution
The molding tool is designed with multiple movable portions that define a mold cavity, allowing for easier demolding by controlling the relative positions of these portions between molding and demolding configurations, and incorporating a forming element with improved thermal conductivity and cooling channels for efficient polymer injection and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single mold cavity is used for molding opening devices, then the structure is simple, but the demolding of gripping elements becomes difficult
Solution Approach 1:
The mold is divided into multiple movable portions (first molding tool portion, second molding tool portion, third molding tool portion) that can move relative to each other. This segmentation allows the mold cavity to be opened in stages, enabling easy removal of gripping elements while maintaining overall structural simplicity.
Solution Approach 2:
The mold portions are designed to be movable rather than fixed, allowing dynamic adjustment of the mold cavity configuration. The first and second portions move relative to each other to facilitate demolding, while the third portion remains stationary, providing a balanced solution between structural simplicity and operational ease.
2Temperature
If cooling channels are added to the molding tool portions, then the cooling efficiency is improved, but the device complexity increases
Solution Approach 1:
Cooling channels are integrated specifically into the first and second movable molding tool portions that require active cooling during the molding process. The third stationary portion does not require cooling channels, allowing the system to achieve improved cooling efficiency only where necessary without unnecessarily increasing overall device 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
This design enhances the ease of demolding opening devices, particularly the gripping elements, improving the efficiency and effectiveness of the molding process.
Implementation Method 1
The first molding tool portion and the second molding tool portion each comprise a respective plurality of cooling channels configured to receive a cooling fluid
Implementation Method 2
Each molding apparatus also comprises one respective injection device coupled to the respective molding tool for injecting a molten polymer into the respective mold cavity
Data Source
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AI summary
There is described a molding tool (40) for molding an opening device (3) comprising a collar (6) having a pouring outlet, a lid (7) covering the pouring outlet and a gripping element (8) connected to and protruding from the lid (7). The molding tool (40) comprises a plurality of molding tool portions (41, 42, 43). At least a first molding tool portion (41) and at least a second molding tool portion (42) define a portion of a mold cavity that defines a shape of the gripping element (8) of the opening device (3) to be molded. The first molding tool portion (41) and the second molding tool portion (42) are configured such that the first molding tool portion (41) is, after molding of the opening device (3), in contact with a first gripping surface (17) of the gripping element (8) and the second molding tool portion (42) is, after molding of the opening device (3), in contact with a second gripping face (18) of the gripping element (8), the second gripping face (18) being opposed to the first gripping face (17).