Multi-stage hot press for processing copper-clad plate

Abstract

The invention discloses a multi-stage hot press for processing a copper-clad plate, which is used for solving the problem that in the prior art, dry flowers cannot easily occur, can also improve the hot pressing effect through multi-stage gradient type heating hot pressing, and structurally comprises a shell, a feeding arm, a discharging arm, a roller group and a laser transmitter, a feeding arm and a discharging arm are arranged at the positions, close to the two end faces, of the shell respectively, a roller set is arranged between the feeding arm and the discharging arm, a workpiece is automatically placed on the roller set, the roller set comprises a hot pressing roller and a material conveying roller, the material conveying roller conveys the workpiece into the hot pressing roller for hot pressing, the roller set comprises more than one hot pressing roller, and the temperature of the hot pressing rollers rises in sequence in the moving direction of the workpiece. Therefore, gradient heating is achieved in one device, the hot pressing quality is guaranteed, meanwhile, the laser emitter is further arranged in the shell, the center of a workpiece in hot pressing is heated through laser generated by the laser emitter, and the dry flower defect is reduced.

Description

technical field [0001] The invention belongs to the field of copper-clad laminate production, and in particular relates to a multi-stage hot press machine for copper-clad laminate processing. Background technique [0002] The reinforcing material is impregnated with resin, one or both sides are covered with copper, and a plate-shaped material is formed by hot pressing, which is called copper-clad laminate. It is the basic material for PCB, often called the base material, when When it is used in the production of multilayer boards, it is also called core board (CORE). The production process of copper clad laminates is mainly divided into the following steps: 1. Mixing glue: pump special resins, solvents, and fillers into them through pipelines in a certain proportion. Stir in the rubber mixing tank, and the materials need to be stirred to prepare a viscous glue with fluidity; 2. Glue drying: pump the mixed glue into the glue tank, and at the same time put the glass fiber The...

AI Technical Summary

Problems solved by technology

[0003] However, in the production of copper clad laminates in the prior art, especially in the lamination process, the substrate is prone to the defect of dried flowers. The cracked copper clad laminate (also called dried flowers) refers to the presence of white spots on the surface of the substrate that are not well fused with the surrounding resin. Spots or small patchy spots, which can be connected into large pieces in severe cases. This is a relatively serious blooming. Slight blooming is some very light clouds on the board surface, and most of them also appear in the middle of the board surface. Because the heat loss in the middle part of the board is smaller than the surrounding area, the curing process in the middle part of the board is faster than the surrounding area, and it is easier to bloom, and the moisture absorption of the adhesive sheet is also easy to cause flowering. Of course, there are also adhesive sheets These problems can be avoided by optimizing material selection and standardized management, but the problem of dried flowers caused by the rapid heat dissipation in the middle part of the substrate during the process cannot be effectively avoided, and can only be avoided through Increase the ambient temperature, or reduce the substrate area, but correspondingly increase energy consumption or reduce production efficiency

Images