A kind of infiltration unit and infiltration method of prepreg

Abstract

The invention discloses an infiltration unit and an infiltration method for a prepreg. The infiltration unit includes an infiltration groove, a positioning mechanism and a thickness measurement mechanism, and the positioning mechanism further includes a first non-contact distance measuring sensor, a second non-contact distance measurement sensor, an infiltration Roller shaft driving equipment and control module, the first non-contact distance measuring sensor is arranged between the infiltration tank and one of the measurement shafts; the second non-contact distance measurement sensor is arranged between the infiltration tank and the other measurement shaft During the time, the wetting roller shaft driving device is set outside the wetting groove and drives the wetting roller shaft to move along the first radial direction of the wetting roller shaft. The control module is connected to the first non-contact distance measuring sensor, the second non-contact distance measuring sensor and the wetting roller The shaft drive device is electrically connected. The present invention ensures that the central longitudinal section of the reinforcing material always passes through the set position of the gap relative to the metering axis.

Description

technical field [0001] The invention relates to the field of copper clad laminates and printed circuit boards, in particular to a prepreg wetting unit and a wetting method. Background technique [0002] The prepreg is made by dipping the reinforcing material into the glue, and then controlling the thickness through the relative metering axis, and then heat treatment in the oven and then cooling. Prepregs are the base material for all types of laminates and printed circuit boards. The gluing machine is the main equipment for the production of prepreg, which generally includes a reinforcing material lead-out unit, an infiltration unit, a baking unit, a cooling unit and a prepreg lead-out unit. [0003] The reinforcement material is infiltrated into the glue by the infiltration unit. The infiltration process of the reinforcement material plays a decisive role in the quality of the prepreg. After the reinforcement material is infiltrated, it is scraped through the relative mete...

AI Technical Summary

Problems solved by technology

The problem with this current production method is that the distance between the center position of the reinforcement material and the center position of the relative metering axis cannot be measured, and once the position of the reinforcement material is fixed in the continuous production process, it is difficult to adjust. During resin coating, the thickness of the resin coating on the surface of the reinforcing material close to the lead-out unit is fixed due to the fixed position of the reinforcing material and the fixed metering axis, and the thickness of the resin coating on the surface near the cooling unit varies with the thickness of the reinforcing material and the movable metering Variations due to changes in shaft adjustment, resulting in uncontrollable resin coating thickness on both sides of the reinforcement

When it is required to continuously produce prepregs with the same thickness of resin coating on both sides, the position of the initial central longitudinal section of the reinforcement material is unreasonable or due to the change of the thickness of the reinforcement material of different thicknesses and the adjustment of the movable axis relative to the metering axis, the center position of the reinforcement material is different from the relative The center position of the metering axis deviates too much (>100um), which leads to inconsistent resin coating thickness on both sides of the produced prepreg, resulting in appearance problems of the prepreg and warping of subsequent laminates, affecting production quality and efficiency; when production is required on both sides For prepregs with inconsistent resin coating thickness, the position of the initial central longitudinal section of the reinforcing material is unreasonable or due to the change of the thickness of the reinforcing material of different thicknesses and the adjustment of the movable axis relative to the metering axis, the central position of the reinforcing material is different from the fixed axis of the metering axis The distance difference from the movable shaft is uncontrollable (the distance difference range is 200-1000um), so it is impossible to quantitatively control the thickness of the resin coating on both sides of the required prepreg, which affects the production quality and efficiency

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