Mold Unit for Microstructures with Embankment and Edge Part
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Solution Overview
Problem
Existing mold units for manufacturing microstructures face challenges in producing uniform thickness of the base layer and efficient use of composition, leading to inconsistent penetration and excess material issues during microstructure production.
Innovation Solution
A mold unit design featuring a first mold with needle grooves, an embankment, and an extension part, allowing for uniform composition distribution and recovery of residual material, enabling the production of microstructures with a uniform base layer thickness and allowing for multiple microstructures to be manufactured through a single process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a mold having a wall surface is used to manufacture microstructures, then the microstructures can be formed with defined boundaries, but the edge thickness becomes larger than the middle thickness resulting in non-uniform penetration
Solution Approach 1:
The mold is segmented into distinct functional regions: a base part with needle grooves for forming microneedles, an embankment region with controlled height to define base layer thickness, and an edge part spaced apart to contain composition. This segmentation allows different regions to serve specific purposes - the embankment ensures uniform thickness while the edge part provides containment, resolving the contradiction between defined boundaries and uniform thickness.
2Area of stationary object
If a mold with no wall surface is used, then the base layer can be manufactured with wide area, but additional processes are required to remove unnecessary portions
Solution Approach 1:
The mold structure performs preliminary action by pre-defining the base layer boundaries through the embankment and edge part configuration before composition filling. The embankment protrusion height is predetermined to match the desired base layer thickness, and the edge part is positioned to contain the composition within the desired area. This eliminates the need for post-manufacturing removal processes, maintaining both wide area production and manufacturing efficiency.
3Quantity of substance
If composition amount greater than or equal to loading amount is supplied, then sufficient material is available for manufacturing, but the base layer thickness becomes large
Solution Approach 1:
The embankment acts as an intermediary structure between the composition supply and the needle grooves. It receives the supplied composition and controls its distribution - allowing sufficient composition to be supplied for complete needle formation while preventing excess composition from increasing base layer thickness. The embankment height serves as a physical mediator that limits the vertical extent of the base layer regardless of composition quantity.
4Reliability
If excess composition is used to ensure complete needle formation, then all needles can be formed, but material waste increases
Solution Approach 1:
The mold structure enables discarding of excess composition in a controlled manner. The edge part, positioned at a predetermined distance from the base part, contains and collects excess composition that flows beyond the embankment during filling. This allows complete needle formation with sufficient composition while recovering or containing the excess material, preventing uncontrolled waste and enabling potential reuse or proper disposal.
Data Source
AI summary
Disclosed is a mold unit for manufacturing microstructures, the mold unit comprising a first mold for manufacturing microstructures in which a plurality of microneedles are formed on one surface of a base layer. The first mold comprises: a first base part in which first needle grooves for forming the microneedles are formed on the upper surface, and which includes a first embankment protruding to a predetermined height around the region where the first needle grooves are formed; a first edge part which is provided along the periphery of the first base part at a predetermined distance from the first base part, and of which the upper end is provided higher than the first embankment; and a first extension part which extends from the first base part to the first edge part, and of which the upper surface is positioned lower than the region where the first needle grooves are formed.