Process for forming lining plastic core pipe of round thin-film capacitor by heat sealing

Abstract

The invention discloses a process for forming a lining plastic core pipe of a round thin-film capacitor by heat sealing. In the process, in the initial stage of the coiling process of the capacitor, an inner packaging thin-film coiled on a coiling block is heated to be melted and bonded layer by layer to form a hollow plastic pipe, namely the lining plastic core pipe, with a 0.2 to 1.20 millimeter thick wall, the size of the hollow plastic pipe varies with the coiling block synchronously without being limited by the size of the capacitor, the lining plastic core pipe is formed after an inner package heating device is removed, and a follow-up coiling process is completely consistent with the conventional production process. The process has the advantages that: the inner circle looseness problem of thin-film capacitors without lining core pipes is solved; the capacitor has reliable quality and long service life; the product size is small; the consistency is high; the production efficiency is high; the production period is short; the product cost is low; and the implementation is simple and convenient and the promotion is easy.

Description

technical field [0001] The invention relates to a manufacturing technology of a film capacitor, in particular to a process for adding a lined core tube to a circular film capacitor under the premise of ensuring production efficiency and basically not increasing production cost. Background technique [0002] At present, film capacitors with a circular structure are not lined with a core tube except for some large-scale capacitors that are lined with a pre-formed core tube. The main reason is that for small-sized capacitors, increasing the inner core tube will significantly increase the volume of the capacitor, increase the difficulty of the process and technical complexity, and significantly increase the production cost. [0003] For a capacitor with a circular structure without a lined core tube, under the action of heating shrinkage and electric field stress, the inner ring of the capacitor will gradually become loose, the electrical performance parameters will decrease, an...

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a heat-sealing process for forming a circular film capacitor lined with a plastic core tube. The process solves the problem of a small-sized film capacitor lined with a core tube, making the capacitor better in quality and more stable in electrical performance

Images