Method for manufacturing conical composite rod

Abstract

The invention discloses a method for manufacturing a conical composite rod. The method comprises the following steps of: (a) manufacturing conical rod fiber fabrics; (b) making a vacuum bag film, a diversion net, an isolating film and demolding cloth all into conical bodies which imitate a fiber conical rod in shape, wherein the diversion net is combined with a resin diversion pipe and a vacuuming pipe; (c) sequentially sleeving the conical vacuum bag film, the conical diversion net combined with the resin diversion pipe and the vacuuming pipe, the conical isolating film and the conical demolding cloth on a conical core mold firstly, and then, sleeving the fiber fabrics layer by layer; and (d) feeding the whole body in the step (c) into a conical external mold which is formed by oppositely combining an upper mold with a lower mold, removing the core mold, and demolding under certain conditions to obtain a finished product. According to the method for manufacturing the conical composite rod, resin is imported by adopting a vacuum method, so that the void ratio of the product is extremely low, and the fiber content reaches up to 70%; and meanwhile, as the conical composite rod is formed by once intramode molding, the efficiency is high, the appearance is smooth, the complicated polishing treatment is not needed, no powder dust is generated, and the energy consumption is extremely low during production. Thus, the material consumption can be reduced under the equivalent stiffness requirements, and the resources are saved.

Description

technical field [0001] The invention mainly relates to a method for manufacturing a conical composite material rod, in particular to a method for manufacturing a conical composite material rod based on fiber preforming. Background technique [0002] Composite materials have light weight and high strength, corrosion resistance, weather resistance, low temperature resistance, small thermal expansion coefficient, good wave permeability, electrical insulation and other characteristics different from traditional materials, and are made of composite materials instead of steel, wood poles, and cement poles. Light poles for road lighting, communication poles, lightning rods, power poles, etc. have made great progress in recent years, and the development prospects are promising. [0003] The production method of tapered composite rods at home and abroad is the fiber winding method. This method has a high fiber content, which can reach 65%-75%. However, because the direction of the fi...

AI Technical Summary

Problems solved by technology

[0003] The production method of tapered composite rods at home and abroad is the fiber winding method. This method has a high fiber content, which can reach 65%-75%. However, because the direction of the fiber yarn in the winding process is inconsistent with the axial direction of the rod, the rod The axial strength and modulus are not high enough. Although some improvement measures have been taken in the winding process to narrow the gap between the fiber direction and the rod axis direction, the efficiency is low and the cost is high. The result is still not ideal. In addition, it is wound on the mandrel After demoulding, the product has a rough texture of entangled fibers, which requires complicated grinding and processing, resulting in material waste; another method is the centrifugal molding method, which is adopted in the patent CN 1048785C, and the product is formed in the mold at one time. High efficiency, smooth surface, no complicated post-processing

Although this method can use glass fiber cloth with the same fiber direction and axial direction, the fiber content of the final product is only 45-55% because the fibers are not fully straightened after unfolding, so the strength and modulus are still not high enough. In addition, some people Tapered rods have been produced by the bag press method. The appearance of the rods produced by this method is similar to that of the centrifugal method, and the fiber content is slightly higher than that of the centrifugal method, but the fibers are twisted, and the strength and modulus are similar to those of the centrifugal method.

Images