Blowing Mould Halves Vertical Extraction Mechanism
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Solution Overview
Problem
The existing methods for manufacturing plastic containers through blow moulding require a significant distance for opening the mould halves, leading to increased cycle time, mechanical inertia, and reduced component lifespan due to excessive friction.
Innovation Solution
The mould halves are moved apart by a smaller distance, adjusted based on the transverse dimensions of the container, allowing for efficient removal of the blown container from underneath the mould, reducing friction and mechanical stress on components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mould halves are moved apart over a large distance to enable lateral removal of the container, then the container can be successfully removed from the mould, but the cycle time increases and mechanical components suffer from excessive friction and inertia
Solution Approach 1:
The patent inverts the conventional removal approach by changing from lateral removal to vertical removal. Instead of opening the mould halves laterally over a large distance, the mould is opened vertically with a small horizontal displacement, allowing the container to be removed from underneath the mould. This inversion resolves the contradiction by enabling successful container removal while significantly reducing the travel distance of mould halves, thereby reducing cycle time and mechanical wear.
2Ease of operation
If the mould halves are moved apart over a large distance, then the container can be removed laterally, but mechanical inertia and friction increase, reducing component lifespan
Solution Approach 1:
The patent applies inversion by changing the removal direction from lateral to vertical. The mould halves are moved apart over a small horizontal distance rather than a large lateral distance, which significantly reduces friction and mechanical inertia. This reduced mechanical stress directly improves the reliability and lifespan of moving components while still enabling successful container removal from underneath the mould.
3Reliability
If the overall distance for opening mould halves is reduced, then friction and mechanical stress decrease, but the container removal becomes more difficult
Solution Approach 1:
The patent applies dimensionality change by transitioning from lateral removal to vertical removal. Instead of requiring large horizontal displacement to remove the container, the mould is opened vertically with minimal horizontal movement. This dimensional shift allows for reduced friction and mechanical stress on components while maintaining effective container removal capability through the vertical opening motion.
4Reliability
If the mould is opened with a smaller displacement, then mechanical wear is reduced, but the cycle time increases
Solution Approach 1:
The patent resolves this contradiction through inversion of the removal mechanism. By changing from lateral to vertical removal, the mould halves move apart over a small distance, reducing mechanical wear and extending component lifespan. The vertical opening mechanism enables this reduced displacement while maintaining efficient container removal, thereby not significantly impacting productivity.
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 approach reduces cycle time, extends the lifespan of mechanical components, and facilitates easier handling and transfer of filled containers by allowing extraction from underneath the mould, thereby improving manufacturing efficiency and reducing maintenance needs.
Implementation Method 1
The preform is then blown or stretch-blown along its longitudinal axis and radially so as to deform and come into contact with the inner walls of the mould
Implementation Method 2
injecting a liquid into the preform so as to cause expansion of said preform within the blowing mould while the preform is being stretched
Data Source
AI summary
The invention concerns a method of manufacturing a container in a blowing mould, the blown container having a neck and a bottom aligned along a longitudinal axis and being enclosed within a blowing mould, the blowing mould comprising two side halves which are in contact with each other along a joint plane when the blowing mould is in a closed position, the blown container having at least one transverse dimension in a longitudinal cross-section including the longitudinal axis, characterized in that the method comprises a step of moving apart the two side halves of the blowing mould along a substantially transverse direction, the two side halves being moved apart from the joint plane over an overall distance that is less than the greatest transverse dimension of the blown container and that enables extraction of the blown container from the blowing mould.