Technology for making ultra-deep fine holes on glass fibre reinforced plastic or its complex

Abstract

A technology for forming ultra-deep fine hole(s) in glass fibre reinforced plastic or its complex includes such steps as sleeving a refractory sleeve tube onto needed core rod, arranging it in the preformed slot on the surface of core material, winding or filling the resin coated glass fibres until obtaining needed shape, loading in closed mould, pouring liquid resin, solidifying, and drawing said core rod out to form said holes. Its advantages are simple and feasible method, correct positioning and high rate of qualified products.

Description

technical field [0001] The invention relates to the field of manufacturing ultra-deep pores, in particular to manufacturing one or more ultra-deep pores with regular or irregular distribution and circular or special-shaped cross-sections in FRP or its composites according to predetermined positions. Methods. Background technique [0002] FRP and its composite materials with other metals and non-metals are often used in the technical fields of petroleum logging, electronic communication, chemical industry, and ocean exploration. According to the requirements of product structure characteristics and technical performance, it is often necessary to manufacture one or more in tubular or rod-shaped FRP or its composites, with regular or irregular distribution, circular or special-shaped cross-section, different diameters, Extra-deep through-holes or blind holes of various depths, used for passing wires, installing electronic components or circulating liquids, etc. The method of ...

AI Technical Summary

Problems solved by technology

The method of making deep holes in FRP or its composites using the existing technology is generally a mechanical processing method, that is, using a drilling machine or a grinder, etc., but due to the limitations of processing tools, it is difficult to manufacture deep holes in FRP or its composites. One or more ultra-deep through holes or blind holes with circular or special-shaped cross-sections, different diameters, different depths, and a depth / aperture ratio greater than 200, and the process is complicated, the product yield is low, and the processing cost is high

Another method is to select or process a high-strength metal rod with a diameter and length corresponding to the diameter and depth of the deep hole to be manufactured. After coating a layer of release agent on its surface, wind or fill it with resin Glass filament or glass filament cloth to a predetermined shape, or wound and filled with glass filament or glass filament cloth to a predetermined shape, put it into a closed mold, and then inject the prepared liquid resin into the mold, and use a drawing device to pull out the rod after curing To produce the required ultra-deep hole, the defect of this method is that when the depth / aperture ratio is close to 300, the contact surface between the rod and the resin is very large, and it is difficult to pull out the rod smoothly after the resin is cured. However, the yield of the product is very low and the cost is very high; if multiple ultra-deep holes are manufactured at one time, not only is it difficult to ensure the exact position of the ultra-deep holes, but also after curing, as long as one bar cannot be pulled out smoothly, the entire product will be damaged. Scrap, so the product yield is lower and the cost is higher