Preparation method of inner-sealed phenolic foam composite air duct with self-locking inserts

Abstract

The invention discloses a preparation method of an inner-sealed phenolic foam composite air duct with self-locking inserts. The specific steps are as follows: 1. Composite the phenolic foam board with the inner surface layer and the outer surface layer to form the main body of the air duct; The edge of the pipe body and the surface of the crease are positioned and cut to form a gap at the crease of the inner surface; the main body of the air duct is bent and spliced; The slotting device is composed of the first welt, the second welt, and cutting strips. The cutting strips are provided with locking teeth; the cutting strips are inserted into the gap by extrusion; and the verticality of each side of the air duct is checked. The invention has the advantages of convenient installation and disassembly, reliable fixing and no need for glue application. The invention has the advantages of avoiding the air leakage caused by the ungluing of the ventilation pipe, resulting in the shedding of the inner surface caused by the weathering of the phenolic foam, and greatly enhancing the connection and occlusion force between the inner wall and the phenolic foam board.

Description

technical field [0001] The invention relates to a preparation method of an inner-sealed phenolic foam composite air duct with self-locking inserts. Background technique [0002] At present, domestic ventilation and air conditioning pipes are mainly made of galvanized steel sheets, and the pipes are sometimes covered with insulation layers such as glass wool, polyethylene foam or rubber sponge. This kind of traditional air duct has long installation period, high production cost, heavy weight, poor heat insulation performance and poor appearance, which makes the users and designers of central air conditioners eagerly hope for the emergence of new air duct materials. Phenolic color steel composite board is a sandwich panel made of phenolic foam board and color steel composite board. On-site processing and molding according to the design specifications, one-time hoisting, no need to add insulation layer. The phenolic color steel composite air duct system has excellent fire pro...

AI Technical Summary

Problems solved by technology

However, the inner wall of the phenolic composite air duct usually adopts the construction technology of silica gel seaming. Because the silica gel material or construction technology is not in place, the iron sheet, aluminum foil or color steel will crack after a long time. Rapid oxygen pulverization, resulting in the air duct insulation material being completely blown away, and the inner layer peeling off is serious, which seriously affects the function of the air conditioner

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