Movable Forming Mould for Deep-Drawn Cellulose Product Ejection
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Solution Overview
Problem
Existing forming moulds face challenges in efficiently inserting and removing air-formed cellulose blank structures, particularly for deep drawn products, due to complex shapes and issues with the formed products sticking to the mould, limiting mechanical and aesthetic properties.
Innovation Solution
A forming mould with a movable element that can transition between extended and retracted states, facilitating the insertion and ejection of cellulose products, including deep drawn items, by using actuators like springs, hydraulic, or pneumatic systems to displace the movable element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional forming mould is used for deep drawn cellulose products, then the product shape can be achieved, but the insertion and removal efficiency is poor due to complex shapes and sticking issues
Solution Approach 1:
The forming mould is divided into multiple independent components: a first mould part, a second mould part, and a movable element that can independently displace between extended and retracted states. This segmentation allows the movable element to perform insertion and ejection functions separately from the forming function, resolving the contradiction between achieving complex product shapes and maintaining operational efficiency.
Solution Approach 2:
The movable element is designed to be dynamic, displacing between an extended state (for insertion and ejection) and a retracted state (for forming). This dynamic configuration allows the mould to adapt its structure during different operational phases, enabling efficient handling of deep drawn products with complex shapes while maintaining ease of operation.
2Productivity
If the movable element is in the extended state for insertion and ejection, then operational efficiency is improved, but the forming surface area is reduced
Solution Approach 1:
The movable element transitions between extended and retracted states dynamically. During insertion and ejection operations, it extends to provide the necessary protruding body for efficient handling. During the forming operation, it retracts to maximize the forming surface area, ensuring that the full pressing surface is available for creating products with complex shapes and negative draft angles.
Solution Approach 2:
The movable element is positioned in the extended state before the forming operation to facilitate preliminary actions (insertion of the cellulose blank and ejection of the formed product). This preliminary positioning ensures operational efficiency without compromising the forming surface area during the actual forming process, as the element retracts before forming begins.
3Strength
If dry-forming methods are used to avoid wet-forming limitations, then mechanical strength and flexibility are improved, but the insertion and removal process becomes more difficult
Solution Approach 1:
The forming mould is segmented into movable and stationary parts, with the movable element specifically designed to handle the insertion and removal operations. This segmentation addresses the difficulty of handling dry-formed products by providing a dedicated mechanism that can efficiently insert cellulose blanks and eject formed products without compromising the mechanical strength advantages of dry-forming.
Solution Approach 2:
The movable element acts as an intermediary between the operator and the dry-formed cellulose products. It facilitates the insertion of blanks and ejection of formed products through its displacable structure, making the operation easier while preserving the mechanical strength benefits of dry-forming methods.
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
The movable element ensures efficient insertion and removal of cellulose products, maintaining smooth forming surfaces and preventing sticking, while allowing for the creation of products with negative draft angles or undercut sections.
Implementation Method 1
The movable element is displaceable between an extended state and a retracted state
Implementation Method 2
during the dry-forming of the cellulose products, the cellulose blank is subjected to a high forming pressure and a high forming temperature
Implementation Method 3
the cellulose blank is subjected to a high forming pressure and a high forming temperature
Data Source
Figure 1a~1b
Figure 1c
Figure 2a~2b
AI summary
A forming mould for forming three-dimensional cellulose products from an air-formed cellulose blank structure. The forming mould comprises a first mould part and a second mould part. The first mould part and the second mould part are movable relative to each other in a pressing direction and arranged to be pressed relative to each other during forming of the cellulose products. The first mould part comprises a movable element displaceable between an extended state and a retracted state, where the movable element in the extended state is arranged as a protruding body extending in the pressing direction relative to a surrounding pressing surface of the first mould part. The movable element is in the extended state configured for inserting the cellulose blank structure into the second mould part and ejecting the cellulose products from the forming mould. The movable element is in the retracted state arranged as a pressing surface cooperating with the surrounding pressing surface for forming the cellulose products.