Clamping method of vacuum freeze drying water solution deacidified books and fixture device

Abstract

The invention relates to a clamping method of vacuum freeze drying water solution deacidified books and a fixture device. The fixture device consists of upper and lower clamping plates, clamping bolts, pressing springs, nuts, gaskets and the like. Water-contained books are placed between two metal plates; bolts are inserted in metal plate holes; the pressing springs are added between the bolts and the nuts; the nuts are uniformly screwed to enable the two metal plates to gradually clamp the water-contained books to extrude out redundant water solution and to further level papers of the books; after the clamping force is increased to a preset range, the nuts are stopped screwing; the metal plates and the books are sent to subsequent freezing and drying procedures; and the metal plates transfer the sublimation heat. The clamping method can enable the books to obtain proper initial clamping force to remove redundant water; in the freezing process, a certain space is automatically released to accommodate the volume expansion of the books; and after the papers on the surface layers of the books are sublimated and dried, proper pressure is applied to the papers to stop excessive drying deformation of the papers so as to meet the requirements of a freeze drying process in the book water solution method deacidification work.

Description

technical field [0001] The invention relates to the field of vacuum freeze-drying technology for acidifying books and documents in aqueous solution deacidification treatment, in particular to a clamping method and clamp device for vacuum freeze-drying water-soaked books in the aqueous solution deacidification protection treatment of old books in collections. Background technique [0002] With the passage of time, both internal factors (deterioration of the paper document material itself) and external factors (storage environment, improper use, etc.) will cause deterioration and damage of paper cultural relics. Many research results have proved that acid plays a leading role in the destruction of document paper, and acid will accumulate more and more in the document, the higher the acidity, the shorter the life of the document. In recent years, the deacidification treatment of paper cultural relics has been carried out at home and abroad, and some achievements have been made ...

AI Technical Summary

Problems solved by technology

[0013] Technical problem: Aiming at the special requirements for book splints in the freeze-drying process after the books are deacidified by the aqueous solution method, the invention provides a clamping method and a clamping device for the books soaked in the aqueous solution. Books can be shaped and get a proper initial clamping force to remove excess water; during the freezing process of books containing water, a certain space is automatically released to accommodate the volume expansion during the crystallization process of the aqueous solution, and after the surface paper of the book first completes the sublimation and drying Appropriate pressure is applied to the paper to effectively prevent the over-drying deformation of the paper and meet the requirements of the freeze-drying process in the deacidification of books by aqueous solution

Images