Sandwich Mold Fabrication
Sandwich Mold Fabrication - Related Videos
06:25
Fabrication of a Master Mold for Microneedles with a Micron-sized Air-vent Hole
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2025
This article introduces a unique method for fabricating master molds with an air-vent hole to prevent air entrapment during viscous polymer casting, enabling the fabrication of gelatin microneedles with sharp tips. By reducing the casting volume of high-viscosity gelatin, thin-walled hollow pyramidal microneedles could also be fabricated.
09:23
Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures
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Cited by 7 •
2012
We present methods for fabrication of patterned microstructures of vertically aligned carbon nanotubes (CNTs), and their use as master molds for production of polymer microstructures with organized nanoscale surface texture. The CNT forests are densified by condensation of solvent onto the substrate, which significantly increases their packing density and enables self-directed formation of 3D shapes.
07:06
Wicking Tests for Unidirectional Fabrics: Measurements of Capillary Parameters to Evaluate Capillary Pressure in Liquid Composite Molding Processes
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Cited by 3 •
2017
An experimental method to measure geometrical parameters and the apparent advancing contact angles describing capillary wicking in unidirectional synthetic and natural fabrics is proposed. These parameters are mandatory for the determination of the capillary pressures that must be taken into account for liquid composite molding (LCM) applications.
06:50
Sandwich-like Microenvironments to Harness Cell/Material Interactions
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Cited by 3 •
2015
The following protocol describes the procedure to assemble sandwich-like cultures to be used as an intermediate stage between bi-dimensional (2D) and three-dimensional (3D) cellular environments. The engineered systems can have applications in microscopy, biomechanics, biochemistry and cell biology assays.
08:16
Fabrication of Custom Agarose Wells for Cell Seeding and Tissue Ring Self-assembly Using 3D-Printed Molds
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Cited by 27 •
2018
This protocol describes a platform for fabricating self-assembled tissue rings in variable sizes using a customized 3D-printed plastic mold. PDMS negatives are cured in the 3D-printed mold; then agarose is cast in the cured PDMS negatives. Cells are seeded into the resulting agarose wells where they aggregate into tissue rings.
FAQs
Alignment determines whether the cavity maintains a consistent shape and thickness across the fabricated material. When the mold layers are accurately matched, confinement remains uniform during curing, cross-linking, or solidification. Misalignment can compromise geometric consistency and reduce reproducibility, making careful positioning an important control step for scaffolds, cell-laden constructs, and other bioengineered materials.
Surface treatment helps manage how the formed material interacts with the mold during fabrication. Appropriate treatment supports easier release after curing, cross-linking, or solidification while helping preserve the intended architecture. This is especially relevant when producing delicate hydrogel, polymer, or composite structures, because difficult release can interfere with the geometry achieved inside the cavity.
Gentle confinement holds the precursor within the intended cavity while its structure develops, without replacing the material’s own curing, cross-linking, or solidification process. The approach supports controlled geometry and reproducible dimensions across different precursor types, including hydrogels, polymers, and composites. Its value is greatest when consistent architecture matters for engineered tissues or biomedical devices.
The method can be used with several precursor classes, including hydrogels, polymers, and composites. Each material may form its final structure through curing, cross-linking, or solidification while confined by the mold layers. This flexibility allows the same general fabrication strategy to support different bioengineering designs, provided the mold geometry and surface conditions suit the intended construct.
A basic workflow begins by preparing the mold layers and their surfaces, positioning the precursor in the defined cavity, and aligning the layers carefully. The assembly then remains in place while the material cures, cross-links, or solidifies. After formation, the completed structure is released from the mold, with alignment and surface treatment supporting dimensional consistency and recovery.
This approach is useful when experiments require tissue-engineering scaffolds, cell-laden constructs, or microstructured biomaterials with consistent architecture. Controlled cavity dimensions make it possible to reproduce designed geometries across samples, supporting comparisons between experiments. The method therefore links material processing with the need for reliable construct shape and repeatable experimental fabrication.
Reliable fabrication improves repeatability by producing structures with controlled geometry and reproducible dimensions. Consistency is important when a laboratory design must be evaluated across multiple samples or adapted into a functional biomedical device or engineered tissue. Careful alignment and suitable surface treatment help preserve the intended architecture, strengthening the connection between experimental prototypes and later bioengineering applications.