A method for producing an epoxy resin cast body by roll-lamination

The preparation of epoxy resin castings by the roll-pressing-lamination method solves the test dispersion problem caused by residual air bubbles in traditional methods, and realizes the preparation of castings with high density and low defects, thereby improving the accuracy of resin formulation optimization and the reliability of mechanical testing.

CN121670898BActive Publication Date: 2026-07-10浙江抟原复合材料有限公司
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Patent Information

Application Number
CN202511752330.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-11-26
Publication Date
2026-07-10
Estimated Expiration
2045-11-26

AI Technical Summary

Technical Problem

Traditional resin casting preparation methods cannot completely eliminate air bubbles, resulting in high dispersion coefficients in mechanical test results, which affects the accuracy and reliability of test data. Furthermore, the resin formulation optimization process is characterized by long procedures and high precision requirements.

Method used

The roll-laminar method is adopted, which includes single-layer pressing, stacking and pre-compaction, hot pressing and compaction. Air bubbles are removed by roll pressing, air is removed by interlayer rolling, and densification is achieved by multi-stage hot pressing. Combined with programmed curing to control volume shrinkage, the casting is finally polished to obtain a high-density, low-defect casting.

Benefits of technology

It significantly reduced the apparent defects of the cast body and the coefficient of variation in mechanical testing, improved the accuracy of resin formulation optimization and R&D efficiency, and ensured the reliability and consistency of mechanical properties.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a method for preparing an epoxy resin casting body by using a roll pressing-laminating method, utilizes a double roll mill to dynamically adjust the opening temperature, roll speed and interval of the double roll, and presses the epoxy resin blank with a single layer thickness; the single layer epoxy resin is laminated and pre-compacted by using a handheld roller; the laminated epoxy resin is placed on a hot press to perform a multi-stage hot pressing procedure of low-temperature medium-pressure, temperature rising and pressure releasing and high-temperature high-pressure; the compacted epoxy resin sheet is scribed to the target casting body shape, and is placed in a casting body mold after being cut; the program curing in the oven is performed; and the sample is obtained after being polished after demolding. The three-stage degassing is performed by roll pressing-laminating-pre-compacting-hot pressing, the bubble residue is reduced from the source, the apparent defects are few, and the dispersion coefficient of the mechanical test of the casting body is greatly reduced.
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Citation Information

Patent Citations

  • Hot pressing device for composite core

    CN117415997A

  • Preparation method of high-viscosity medium-temperature curing epoxy resin casting body

    CN117774364A