Magnetic Bistable Mold Locking for Low-Maintenance Blow Molding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing molding units for thermoplastic container production require frequent maintenance of bistable devices, which are prone to mechanical wear and require lubrication, leading to significant downtime and labor costs due to the need for regular operations to ensure proper locking and unlocking of mold supports during the blowing process.
Innovation Solution
The implementation of a bistable device using magnetic dipoles to remotely control the movement of the locking mechanism, eliminating the need for mechanical contact and reducing maintenance requirements by maintaining the locking member in stable positions through magnetic repulsion forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cam-driven control device is used to control the locking mechanism, then the locking member can be moved between locked and unlocked positions, but mechanical contact causes wear and requires frequent maintenance
Solution Approach 1:
The patent replaces the cam-driven mechanical control system with a magnetic field-based control system. The movable element is actuated by magnetic attraction/repulsion forces from fixed magnetic elements instead of mechanical cam contact, eliminating wear between moving parts while maintaining reliable locking and unlocking functionality
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the control mechanism and the locking member. The magnetic field acts as a non-contact mediator to transmit force and control the locking member's position without requiring direct mechanical contact, thereby reducing wear and maintenance needs
2Stability of the object's composition
If mechanical contact is used in the bistable device, then stable positioning can be achieved, but wear and lubrication requirements increase maintenance time
Solution Approach 1:
The patent substitutes mechanical contact-based stable positioning with magnetic field-based positioning. The movable element maintains stable positions through magnetic attraction and repulsion forces from fixed magnetic elements, eliminating the need for mechanical contact and associated wear, thus reducing maintenance downtime
3Reliability
If frequent maintenance operations are performed on the bistable device, then proper locking and unlocking function is ensured, but production downtime increases
Solution Approach 1:
The patent replaces the maintenance-prone mechanical cam-driven system with a magnetic field-based system that has no wear between moving parts. This substitution maintains reliable locking and unlocking functions while eliminating the need for frequent maintenance operations, thereby ensuring continuous production without downtime
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 significantly reduces maintenance time and labor by ensuring reliable operation of the locking mechanism without mechanical wear, allowing for continuous production with minimal intervention, thereby enhancing operational efficiency and reducing downtime.
Implementation Method 1
the fixed magnetic dipole exerting a magnetic force at a distance on the moving magnetic dipole to force the moving element towards one or the other of the stable extreme positions
Data Source
Figure 1~2
Figure 2A~2B
Figure 3~4
AI summary
The invention relates to a container molding unit (18) comprising: - two mold supports (22, 24); - a device (42) for locking the mold supports (22, 24) in the closed position; - a bistable device (62) comprising a fixed element (64) and a movable element (66) between two stable extreme positions (P1, P2); characterized in that the movable element (66) comprises a movable magnetic dipole (68), and the fixed element (64) comprises a fixed magnetic dipole (70), the fixed magnetic dipole (70) exerting a magnetic force (Fm) at a distance on the movable magnetic dipole (68) to force the movable element (66) towards one or the other of its two stable extreme positions (P1, P2).