Light-Curable Resin Composition for Lost Wax Mold Preparation
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Solution Overview
Problem
Conventional light-curable resin compositions used for forming prototype models in the lost wax method suffer from surface deterioration due to soot residues and cracks caused by expansion rate differences between the resin and embedding material during heating.
Innovation Solution
A light-curable resin composition incorporating a (meth)acrylate-based UV-curable resin and a compound with an alkylene glycol skeleton, which enhances vanishing properties and reduces thermal expansion, thereby minimizing soot residue and crack formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional light-curable resin composition is used to form the prototype model, then the prototype can be formed, but soot residues remain in the embedding material and the surface of the cast product deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the light-curable resin by introducing a specific compound with an alkylene glycol skeleton (Formula 1) having a methacryloyl group. This chemical parameter change improves the vanishing properties of the resin during heating, reducing soot residue and improving surface quality of the cast product.
Solution Approach 2:
The patent creates a composite resin composition by combining a (meth)acrylate-based UV-curable resin with a specific compound having an alkylene glycol skeleton. This composite material achieves both good forming properties and improved vanishing properties, reducing soot residue while maintaining prototype integrity.
2Ease of manufacture
If the prototype model is heated to remove the embedding material, then the mold is prepared, but cracks or fractures are generated in the embedding material due to difference in expansion rates
Solution Approach 1:
The patent modifies the thermal expansion parameters of the resin by incorporating a compound with an alkylene glycol skeleton. This changes the expansion rate during heating to match the embedding material more closely, preventing cracks and fractures while enabling complete vanishing of the resin.
3Object-generated harmful factors
If the resin is heated to improve vanishing properties, then soot residue is reduced, but the resin may expand excessively causing cracks
Solution Approach 1:
The patent optimizes the thermal decomposition parameters of the resin by introducing a specific compound with an alkylene glycol skeleton. This changes the heating behavior to improve vanishing properties while controlling expansion rate to prevent excessive expansion and cracking.
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
The composition reduces soot residue and crack occurrence, resulting in improved surface quality and structural integrity of the cast products.
Implementation Method 1
a light-curable resin composition comprising a (meth)acrylate-based UV-curable resin (A)
Implementation Method 2
melting-removing, decomposing-removing, or calcinating-removing the prototype model by heating the prototype model
Implementation Method 3
decomposing-removing, or calcinating-removing the prototype model by heating
Data Source
AI summary
An object of the present invention is to provide a light-curable resin composition having reduced soot residue at the time of mold preparation and reduced occurrence of cracks and fractures. The present invention has found that a light-curable resin composition including a (meth)acrylate-based UV-curable resin (A) (with proviso that the following compound (B) is omitted), and a compound (B) having an alkylene glycol skeleton represented by a specific chemical formula in a structure allows the soot residue at the time of mold preparation to be reduced and occurrence of cracks and fractures to be reduced, whereby the above object is achieved.