Local-vacuum hole plugging device

Abstract

The invention discloses a local-vacuum hole plugging device. The local-vacuum hole plugging device is simple in structure, convenient to operate, stable in printing ink adhesion property and good in hole plugging effect and is applied to the technical field of PCB hole plugging machining. The local-vacuum hole plugging device comprises a hole plugging mechanism (1) and an outer cover (2); an inner cavity (3) is formed in the outer cover (2); one end of the outer cover (2) is provided with an opening (4) communicated with the inner cavity (3) and a sealing ring (5) surrounding the opening (4); the outer cover (2) is further provided with an air extraction connector (6) communicated with the inner cavity (2); one end of the hole plugging mechanism (1) penetrates through the outer cover (2) and is located in the inner cavity (3); a sealing element is arranged between the hole plugging mechanism (2) and the outer cover (2).

Description

technical field [0001] The invention relates to a plugging device, in particular to a partial vacuum plugging device. Background technique [0002] Printed circuit boards (PCBs), especially high-density PCBs, are composed of several layers of conductive copper plates and insulating plates. Usually, several through holes and blind holes of different depths are drilled on the PCB board. The conductive copper plates of each layer in the PCB board are connected, and the conductive copper plates of the required layers in the PCB board are connected through blind holes. The production of PCB generally needs to go through processes such as drilling, plated holes, etching, etc., and also needs to go through a plugging process. The plug hole process is to make the conductive copper plate in the PCB board meet the electrical performance connection requirements. At present, the ink on the PCB is generally squeezed into the through holes and blind holes by a scraper under normal tempe...

AI Technical Summary

Problems solved by technology

This kind of plugging method is easy to block the air in the hole during the operation and generate air bubbles, because at normal temperature and pressure, there is air in the hole, and the ink used to plug the hole also has air

For some small and deep holes, especially those small and deep blind holes, such as blind holes with a diameter of 0.05 mm and a depth of 3 mm, it is very easy to have incomplete plug holes, resulting in air remaining in the holes, while in the In the subsequent baking operation, air bubbles or residual air in the holes are heated and expanded, resulting in serious defects such as blast holes, holes, and dents, resulting in defective products

[0003] At present, there is a Chinese patent with a publication number of 1642388, which discloses a method and device for using a scraper to make PCB ink plug holes, mainly on the end side of the ink plug hole path of the substrate, at least one scraper is used to swing to an inclination angle , the method of processing the ink plug hole by pushing and touching the surface of the substrate; and using a driving member to drive at least one flexible rectangular scraper on the scraper seat to form the ink plug hole device, so as to scrape the ink on the substrate by swiveling the scraper blade Carry out the plug hole operation, although the technical solution of this patent can scrape the ink plug hole, but for some small and deep holes, especially those small and deep blind holes, the above technical solution still cannot achieve good results

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