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BEIHAI YUEDA FRP PRODUCTS
Understanding the manufacturing process of fiberglass pipes.
Release time:
2020/07/13
The structure of the fiberglass pipe wall consists of the following layers from the inside to the outside: fiberglass inner lining layer, fiberglass secondary inner lining layer, fiberglass winding layer, and fiberglass external protective layer. The fiberglass inner lining layer and the fiberglass secondary inner lining layer serve to prevent corrosion and seepage, while the winding layer provides strength and rigidity to the pipe. The external protective layer is responsible for aging resistance, corrosion resistance, and UV protection. So, what is the manufacturing process of fiberglass pipes? Let's introduce it below: (1) Preparation process. a. Equipment debugging: First, carefully check the normal operation of the equipment and working components, especially whether the dual-component resin curing agent pump is blocked, and whether the ratio of the dual-component resin curing agent pump is correct.
The structure of the fiberglass pipe wall consists of: fiberglass inner lining layer, fiberglass secondary lining layer, fiberglass winding layer, and fiberglass outer protective layer. The fiberglass inner lining layer and the fiberglass secondary lining layer serve to prevent corrosion and seepage, while the winding layer provides strength and rigidity to the pipe. The outer protective layer is responsible for aging resistance, corrosion resistance, and UV protection. So, what is the manufacturing process of fiberglass pipes? Let's introduce it below:
(1) Preparation process: a. Equipment debugging: First, carefully check the normal operation of the equipment and working components, especially whether the dual-component resin curing agent pump is blocked, and whether the ratio of the dual-component resin curing agent pump meets design requirements, ensuring the stability of the lining, winding, trimming, and demolding operations.
b. Clean the mold, ensuring that the mold surface is free of pits, dust, debris, and other attachments. If there are issues, the mold should be leveled and maintained in a timely manner.
c. Wrap with polyester film. To facilitate the demolding of the pipe, a layer of polyester film should be applied to the mold surface. The overlap width of the film is 1-2, and the thickness of the film is 40um, requiring that both sides of the film are undamaged, wrinkle-free, smooth, and clean, with the quality of the film meeting the requirements of GB13950-1992.
(2) Lining process. a. Preparation of lining resin, according to the resin formulation system established by the production department based on the current working environment and temperature conditions, mix the lining resin, and reasonably control the amount of materials based on production progress. When the on-site conditions change, the production department should promptly adjust the formula and prepare the resin according to the new formula. b. Preparation of reinforcement materials, transport the required reinforcement materials for the lining to the designated location, and first cut some wider reinforcement materials to the design width.
c. Production of the lining, the lining should be made according to the laying steps required by the design. Reasonable tension should be applied during the laying of each layer, and they should overlap appropriately. Repeated rolling of the composite roller can eliminate bubbles and ensure complete impregnation of the fibers, requiring that the reinforced material layer meets the design's resin content requirements.
d. Preliminary self-inspection, after laying each layer according to design requirements, operators are required to conduct a preliminary quality check: whether the lining meets the design thickness, whether there is local lack of glue or hanging glue, and if the above situations occur, whether there are white spots, bubbles, etc. Report promptly and take measures to address them;
(3) Curing. The purpose is to improve the corrosion resistance and temperature resistance of the pipe.
(4) Process quality inspection. Before winding, confirm that the inner lining is free of bubbles, pores, impurities, has a smooth surface, reasonable resin content, no white spots, and local poor curing, and carefully check whether the inner lining is qualified.
(5) Winding process. Input the design parameters into the computer, and after the lining has cured, control the reciprocating winding to the thickness of the winding layer using the computer, using alkali-free, untwisted fiberglass, applying an outer protective layer with 100% resin content according to the specified thickness, with the resin content of the winding layer I generally around 35%, and its thickness depends on the strength and rigidity designed for the pipe.
(6) Curing. The pipe has entered the curing stage, during which the rolling of the mold should maintain an appropriate speed for uniform curing. During the curing process, attention should be paid to monitoring the temperature of the pipe body and reasonably adjusting the curing plan.
(7) Trimming and demolding: When the hardness of the pipe exceeds 30, trim the pipe ends, and then use a hydraulic demolding machine to separate the pipe from the mold.
(8) Pipe water pressure test and arrangement: Each batch of pipes undergoes a water pressure test as specified, filling with water and uniformly increasing the pressure to 1.5 times the design pressure of the pipe, maintaining the pressure for no less than 2 minutes. Carefully check the surface of the pipe and the pressure gauge, and after passing the pressure test, place the pipe on two-point supports.
Guangxi Fiberglass Products Co., Ltd. specializes in the production of various models of fiberglass pipe products, which can be customized as needed, produced quickly, and guaranteed quality. We can undertake large-scale water conservancy projects such as drainage and sewage discharge projects. Welcome to call for consultation.
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