Repairing method of glass fiber reinforced plastics products

Abstract

The invention discloses a repairing method of glass fiber reinforced plastics products, which comprises the steps of: 1, judging whether the defect of the glass fiber reinforced plastics products needs artificial expansion, if so, entering the step 2, if not, directly entering the step 3; 2, cutting and scraping the defect position and the peripheral position thereof; 3, alternatively coating the defect by using precast glass fiber reinforced plastics powder and a strong binder until a mixture of the glass fiber reinforced plastics powder and the strong binder is filled fully into the defect; 4, repairing the part of the mixture of the glass fiber reinforced plastics powder and the strong binder, overflowing the defect, to ensure that the outline of the glass fiber reinforced plastics products accords with the design requirement; and 5, coating white oil outside the repaired defect. The repairing method of the glass fiber reinforced plastics products has convenience and rapidness, low repairing cost, high strength and difficult shedding of the repaired defect.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a method for repairing FRP products. Background technique [0002] The scientific name of FRP is glass fiber reinforced plastic, which is a composite material with glass fiber as reinforcement material and synthetic resin as matrix material. The material has the advantages of light weight and hardness, non-conductivity, high mechanical strength, corrosion resistance, etc., so it has a wide range of applications in industry, transportation and other fields. [0003] In the process of solidification and molding (such as compression molding) of FRP products, local material shortages and damages often occur, such as material shortages, pores, cracks, etc.; and in the machining process and assembly process after forming, scratches, Scratches and other conditions, these conditions are objective and unavoidable, and all of them will leave defects on FRP products. And in order to gua...

AI Technical Summary

Problems solved by technology

[0011] The repair method of FRP products in the prior art above has the following defects: first, the repair method needs to consume atomic ash and curing agent, which increases the cost; secondly, because acetone is used to clean the ash residue formed by cutting and scraping, the operation of this step is troublesome , and it needs to consume acetone, which further increases the cost; again, it is also a more important point, after filling the defect with the viscous matter of putty and curing agent, it is necessary to wait for the viscous matter to dry and solidify, and the drying process of the viscous matter Slow, generally takes about 20 minutes, time-consuming and low work efficiency; then, because the viscous matter of putty and curing agent dries up and the initial strength is not strong, it can only be sanded slowly with sandpaper, and the sanding process is slow and laborious, further It increases labor intensity, consumes more time, and further reduces work efficiency; then, the painting process is time-consuming and laborious and requires paint consumption, which further reduces work efficiency; finally, and most critically, due to the putty and curing agent After all, the viscous material and FRP are not the same material, and it is difficult to fuse with each other. The strength of the repaired part is very low, and it is easy to fall off.