[China Aluminum Industry Network] (a) uneven board, not vertical, seam width, height inconsistency 1, reasons: horizontal and vertical frame of the poor, uneven facade, board surface installation is poor, hole misalignment;
2, control:
(1) Begin by installing embeds and expansion bolts. When the skeleton is installed, it shall be horizontally and vertically drawn, the plane shall be flat, and then the theodolite shall be inspected for process acceptance;
(2) Positioning of board and skeleton, drilling must be accurate;
(3) When the board is installed, it must not be arbitrarily installed. It must be installed according to the plan and the location of the bullets. Before installation, it is necessary to check the dimensions of the plate and check the shape. The inspection can be performed without errors.
(2) The joints are not tightly sealed, uneven, and there are air bubbles and water seepage phenomenon. 1. Causes (1) The end of the caulking is blocked with polyethylene foam after the board surface, when the sealant is used to fill the sealant Pressure, so that the joints and board seams are not strong, sealing is not strict;
(2) The operator is unfamiliar with the operation, the distance from the muzzle to the caulking at the time of caulking is inconsistent, the pressure is not uniform, the thickness is uneven, the joints are many, and the air is brought in, causing the surface of the sealant to be uneven, with bubbles and Water seepage phenomenon;
(3) Material Problems: There is a problem with the quality of silicone sealants.
2. Prevention and control measures (1) Better material selection and better tool performance;
(2) Carefully insert the seal filler, keep the distance from the surface of the filling surface consistent, and insert the sealant at the same depth, so that the joints are dense and the seam surface is straight;
(3) Operators are skillful in their skills, keep the caulking guns at a uniform speed, keep the same distance, remove the air with the plug, and smash the air bubbles as soon as they appear, and use a trowel to flatten the gas.
(3) Inaccurate handling of closures, irregularities, and lack of sealing. 1. The construction was not completed at the end of the reason. The installation was not detailed and the method was improper.
2. Prevention and control measures (1) Before the construction, do a good job of closing the mouth, and adopt a rational closing scheme for different structures and conditions;
(2) Strict operation during installation and mastering of essentials.
(D) surface contamination, dents 1, reasons (1) premature removal of protective film, improper protection of finished products;
(2) Improper protection of finished products during construction of the next process, resulting in collision with the surface of the board.
2. Prevention and control measures (1) Do not remove the protective film prematurely; dismantle it when removing the scaffold;
(2) Work out feasible product protection measures during work;
(3) Clean up and clean the polluted place in time.
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