Preparation method of inner sealing phenolic foam composite air pipe with self-locking inserting strips

Abstract

The invention discloses a preparation method of an inner sealing phenolic foam composite air pipe with self-locking inserting strips. The method specifically includes the following steps that I, a phenolic foam board, an inner surface layer and an outer surface layer are composited to form an air pipe body, the edge and the surfaces of the fold marks of the air pipe body which is already composited are subjected to positioning cutting treatment, and seams are formed at the fold marks of the inner surface layer; II, the air pipe body is bent and spliced; III, an inserting seam device is connected to the seams of the inner surface of the air pipe body in an inserting mode and is composed of the first attaching edge, the second attaching edge and the inserting strips, and the inserting stripsare provided with locking teeth, and the inserting strips are inserted into the seams through squeezing; and IV, the perpendicularity of all the sides of the air pipe is checked. The preparation method has the advantages that mounting and demounting are convenient, fixing is reliable, and gluing is not needed. Besides, the advantage that air leakage caused by glue failure of a ventilation pipeline is avoided, and then falling off of the inner surface due to phenolic foam weathering is avoided is achieved; and the advantage that the connectivity and engagement force between the inner wall andthe phenolic foam board layer are greatly improved is achieved.

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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