Process for producing sideless cylindrical paper boards

A production process and cardboard technology, applied in textiles and papermaking, etc., can solve the problems of processing errors between the inner diameter and outer diameter of paper tubes, affecting the voltage resistance performance of transformers, and complex processing methods, so as to reduce processing links, eliminate secondary pollution, The effect of excellent mechanical properties

Inactive Publication Date: 2010-05-26
XINSHAO GUANGXIN ELECTRICAL INSULATING MATERIALS
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AI Technical Summary

Problems solved by technology

This kind of processing method is complicated, and it is easy to produce processing errors between the inner diameter and outer diameter of the paper tube. The cardboard is prone to secondary pollution during transportation, storage, and processing, which affects the withstand voltage performance of the transformer.

Method used

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  • Process for producing sideless cylindrical paper boards
  • Process for producing sideless cylindrical paper boards

Examples

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Embodiment Construction

[0012] The unenclosed data is that of Example 1, and the data in parentheses is that of Example 2. Decompose the wood pulp 1 into pulp 2, concentrate 3 and refine pulp 4, the degree of percussion is 33 (37) ° SR, and the wet weight is 11 (15) g. Net 7, the formed wet paper sheet is transported to the rotating circular mold 9 through the felt 8, the paper embryo adheres to the mold and moves with the mold circle, relying on the pressure of the supporting roller 10, the paper embryo is dehydrated to 69 (73)%, when the thickness reaches When the predetermined thickness is reached, the thickness meter 11 issues an instruction to stop the slurry supply, hang out the mold, and the paper embryo adheres to the mold and hangs it to the bracket 12 together, and after another set of molds are replaced, the production is repeated. Move to the paper embryo mold on the bracket 12, first tightly wrap it on the paper embryo with 100 (120) mesh high-temperature resistant nets, do not allow the...

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Abstract

The invention relates to a process for producing sideless cylindrical paper boards. The process comprises the following steps: delivering paper pulp to a round net of a paper machine by a pump to form a paper blank; delivering the paper blank to a rotary cylindrical mould by coarse calico; adhering the paper blank to the mould to do circular motion so as to be thickened gradually; when the dehydrated paper blank reaches a stated thickness, stopping the pulp delivery pump, and molding the delivered pulp; hoisting the mould wound with the paper blank to a stander beside a thickener; after replacing another set of mould, repeating the production; shifting in the paper blank mould on the stander, drenching the paper blank by a nylon net to be wound tightly, and then fully winding the paper blank by an elastic band; after well winding, hoisting the paper blank mould into the thickener to perform thickening treatment and delivering the paper blank mould to a drying room for drying; and after the drying, delivering the paper blank mould to a balance chamber, slowly cooling the paper blank to room temperature and demoulding, and cutting, modifying, packaging and storing the paper blank. The process reduces the processing links, saves energy, does not lap a paper cylinder, has high precision and good performance, and is particularly suitable for ultrahigh-voltage transformers.

Description

technical field [0001] The invention relates to a production process of an endless cylinder cardboard, and belongs to the field of papermaking technology and transformer insulating paper tube processing. Background technique [0002] Endless cylinder cardboard is mainly used as insulating paper tube for transformers or as endless paper tube for special purposes. At present, the transformer insulating paper tube is made of purchased insulating cardboard through mechanical processing, bonding, drying and other methods. This kind of processing method is complicated, and it is easy to produce processing errors between the inner diameter and outer diameter of the paper tube. The cardboard is prone to secondary pollution during transportation, storage, and processing, which affects the withstand voltage performance of the transformer. Contents of the invention [0003] The purpose of the invention is to adopt a new endless cylinder paperboard production process to form a paper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J3/10
Inventor 成余庆刘德云周暾伟
Owner XINSHAO GUANGXIN ELECTRICAL INSULATING MATERIALS
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