Manufacturing process of propeller and large efficient blade propeller of fan

Abstract

The invention discloses a manufacturing process of a propeller and a large efficient blade propeller of a fan. The manufacturing process comprises the following steps: preparing a necessary propeller manufacturing external die and a polystyrene cystosepiment preform, wherein the structures of the preform and the propeller to be manufactured are the same, but the size of the preform is reduced by a circle according to a ratio compared with the size of the propeller to be manufactured, and the polystyrene cystosepiment preform is manufactured for bracing the interior of a soft air bag, so that a prepreg can be conveniently paved; after sleeving the air bag outsides the polystyrene cystosepiment preform, integrally paving the prepreg outsides the air bag, and finally manufacturing the needed product by virtue of a single-air bag process or a multi-air bag process. The product has a very compact structure and is very good in structure strength and light in weight; on the aspect of procedure, the product is finished by one time, the procedure is simple, is short in consumed working hour and very high in efficiency and is capable of shortening the working hour by four fifths compared with the conventional method; on the aspect of quality, as the product is integrally finished in the die, the strength of a workpiece is very large, the finished product rate is very high, and the standardization is very good.

Description

technical field [0001] The invention relates to the manufacturing technology of blades, in particular to a manufacturing technology of propellers and large-scale high-efficiency fan blades. Background technique [0002] Regarding the manufacturing process of propellers and large-scale high-efficiency fan blades, the traditional molding method is that the mold is an upper and lower two-part mold (female mold). When the two parts of the mold are opened, the two parts of the mold are respectively started to be manufactured. Wet process or The pre-invasion process is used to manufacture the upper and lower surfaces of the propeller separately, such as figure 1 . For the laid mold, first, connect the vacuum tube and put the mold on a vacuum bag, then connect the vacuum tube to the vacuum pump for vacuuming, when the vacuum strength meets the requirements, inject resin glue, and finally cure (4 hours) until it is formed and taken out. like figure 2 . After forming, the upper ...

AI Technical Summary

Problems solved by technology

[0004] Method 1 (wet process): The molding method is relatively complicated, the work is difficult, and there are many processes. When the mold is closed, the workpiece needs to be trimmed, and the quality of the trimming is extremely high, and the process is more man-hours

[0005] Method 2 (pre-invasion process): Compared with method 1, the process is a little simpler, but because the internal foam cannot provide sufficient support when pressurized, and the pressure on the composite material is insufficient when pressurized, so the formed structure Poor tightness, thus poor overall strength

Images