Flexible Core Lipstick Molding for Complex Layered Patterns
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Solution Overview
Problem
Existing methods for producing multi-layer lipstick leads are limited by the use of rigid cores with tapered geometries, restricting the ability to create complex configurations, patterns, or undercuts, and do not allow for diverse properties in the pasty masses.
Innovation Solution
A device using a flexible mold and core allows for the creation of complex patterns and undercuts by enabling the flexible core to deform without damaging the first pasty mass, using a flexible core that can change shape passively or actively, and optionally with a support mandrel for stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rigid cores with tapered geometries are used, then the core can be easily removed from the mold, but the ability to create complex configurations, patterns, or undercuts is restricted
Solution Approach 1:
The patent applies this principle by using a flexible core instead of a rigid core. The flexible core can be deformed during removal from the mold, allowing it to pass through the solidified first pasty mass without damaging it. This flexibility enables the creation of complex configurations, patterns, and undercuts that would be impossible with rigid cores, while still allowing for easy removal through elastic deformation.
Solution Approach 2:
The patent applies this principle by making the core flexible rather than rigid, allowing it to dynamically change its shape during the removal process. The core can be deformed to a smaller size or different geometry to facilitate extraction from the mold without damaging the cosmetic product, thereby resolving the contradiction between ease of removal and design freedom.
2Reliability
If the core is designed to not damage the first pasty mass during removal, then the first pasty mass remains intact, but the core geometry is restricted to simple tapered forms
Solution Approach 1:
The flexible core material allows the core to be deformed during removal, enabling complex geometries and patterns on the core surface without compromising the integrity of the first pasty mass. The flexibility absorbs the stress of removal, preventing damage while allowing for intricate designs.
Solution Approach 2:
The patent changes the physical parameter of the core from rigid to flexible, which fundamentally alters how the core interacts with the pasty mass during removal. This parameter change allows the core to deform and adapt its shape, enabling complex geometries while maintaining product integrity through controlled deformation rather than damage.
3Device complexity
If rigid cores are used, then the manufacturing process is simple, but only smooth layers of pasty masses can be produced
Solution Approach 1:
The flexible core allows for precise surface configurations including patterns and undercuts to be imprinted on the pasty masses. The flexibility enables the core to be removed without damaging these precise surface features, whereas rigid cores could only produce smooth surfaces due to their limited geometric options.
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 the production of lipstick leads with complex patterns and diverse properties in multiple pasty masses, allowing for interlocking structures and visible patterns, while minimizing damage to the first pasty mass during demolding.
Implementation Method 1
the flexible core can deform when moved into the second position so that the flexible core does not damage the first pasty mass. This deformation can occur independently or with assistance.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
The present invention generally relates to a device for shaping a cosmetic product, in particular a lipstick tube. The device according to the invention comprises a flexible mold and a flexible core or several flexible cores with different diameters. Furthermore, the device may have a rigid mandrel adapted to be moved at least partially into the flexible core. An annular gap may be located between the flexible core and the rigid mandrel. The device may also have a reducer that is inserted at least partially into the flexible mold from above. The reducer may at least partially contact the inside of the flexible mold.