Method for manufacturing exhaust passage

Abstract

The invention relates to a method for manufacturing an exhaust passage for eliminating kitchen fume and bathroom waste gas. The method for manufacturing the exhaust passage includes respectively smearing gel material on two inner sides of a V-shaped bottom form and two outer sides of a reverse-V-shaped top form matched with the V-shaped bottom form. Forms in the manufacturing process are V-shaped, and the method requires no vertical plastering forming compared with the conventional forming process for the exhaust passage, so that the requirement for technical skilled degree of production workers is low, labor is saved, and the wall depth of the exhaust passage is easy to evenly control. Compared with a subsequently-modified method for manufacturing an integrated residential exhaust passage by a rotatably foldable form, the method requires no rotation of any form in manufacturing process, and accordingly the time for rotating a corresponding form need not be controlled. Therefore, the method for manufacturing the exhaust passage is easy to control, convenient to use and convenient for popularization of large-scale industrialization.

Description

technical field [0001] The invention relates to a preparation method of an exhaust duct for removing kitchen oil fume and toilet waste gas. Background technique [0002] The exhaust duct is mainly used to collect kitchen fume and bathroom exhaust gas. With the development of urban construction and the increase of residential construction, the demand for exhaust ducts is also increasing. [0003] The current residential exhaust ducts are basically formed by the traditional process: first, erect two side forms on the ground, use the ground between the side forms as the bottom form, and paint the surfaces of the bottom form and the side form A layer of release agent, followed by a layer of cement mortar by hand, followed by a layer of reinforcing material, and a layer of cement mortar, the bottom surface and two sides of the exhaust duct are formed in this way; then, between the side molds The top mold is supported between the top molds, and the cement mortar and reinforcemen...

AI Technical Summary

Problems solved by technology

Long-term practice has proved that this traditional exhaust duct molding process has the following defects: (l) It requires high technical proficiency for production workers; The release agent becomes very slippery, and the cement mortar is easy to slip off after being applied. The production workers must undergo a long period of training to complete this difficult operation; (2) The wall thickness of the exhaust duct is not easy to control and uniform ;Because the side mortar of the exhaust duct is easy to slide down, its wall thickness uniformity largely depends on the operator's technical proficiency and sense of responsibility, it is difficult to ensure the consistency of the side wall thickness, and the product quality cannot be truly controlled , there is no guarantee that its dimensional tolerances and mechanical performance indicators meet the requirements of the national industry standard "Residential Kitchen and Bathroom Exhaust Duct" JG / T194-2006

Practice has proved that this preparation method still has the following defects: the preparation process needs to strictly control the time of rotating the corresponding mold before the initial setting of the cementitious material, and the preparation process is not easy to control

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