How to fabricate and install PIR Pre-insulated duct system Part Six

2022-12-01

How to fabricate and install PIR Pre-insulated duct system Part Six

Using a pre-insulated duct CNC cutting machine will definitely improve your duct making efficiency. A pre-insulated duct CNC cutting machine is a computerized cutting machine that cuts fast and accurately.

Production and installation method of aluminum foil composite sandwich panel air duct.

Construction preparation:

The air duct construction supervisor must be familiar with the air duct and tuyere layout and design requirements, relevant specifications and regulations; understand the air duct and tuyere production and installation process, and make technical disclosures to the construction team leader.

According to the construction progress, the air duct construction supervisor makes a demand plan for plates and other auxiliary materials, and checks the specific situation in place.

Before construction, the quality safety personnel should conduct a comprehensive inspection of construction equipment and materials according to regulations. Only qualified ones can be used for construction, and corresponding records should be made.

Air duct production:

Placing the boards:

When the board is hoisted, a dunnage should be placed where the rope is in contact with the board or the paper box.

The board stacking site must be clean and flat.

Plates shall not be thrown, touched, smashed or stepped on.

The stacking of plates should not be too high, and no more than eight pieces are appropriate.

Plates can not be stored in the open air, to prevent rain and wet.

The plate should not be lifted horizontally, it should be carried vertically.

Operating the knife: the blade should be clean and sharp; the knife (especially the bottom end) should be clean, free of glue and other dirt; the electric push knife should remove the impurities on the V-shaped cutter head before use.

The depth of the blade should be in place, and the length of the 90-degree blade should be based on cutting through the sheet without cutting the lower aluminum foil; the left and right 45-degree knives and straight knives should be based on cutting through the sheet and the lower aluminum foil.

For 45-degree knives and 90-degree knives, the angles should be accurate without deviation.

The application force of the knife is uniform and the speed is stable, and the bottom end of the knife does not damage the upper aluminum foil in contact with it.

Cutting board blanking:

The blanking board should be cut into a square or rectangle first (making a straight tube first), and then try to use the remaining material to make a special-shaped tube.

The incision of the plate should be accurate, and the tangent should be straight or scribed.

The incision of the plate should be smooth and free of damage.

The dimensions of each diagonal line of the rectangular (square) duct should be the same, and the error should be ≤1.5mm. The two adjacent surfaces of the duct should be perpendicular to 90 degrees, and there should be no obvious gaps in the joints.

After cutting the inner and outer arc plates of the elbow, press the horizontal lines on the board surface. The horizontal lines should be perpendicular to the end face of the incision, with the same width and width, 20mm~50mm. After pressing, fold the line to a certain degree. radians, radians should be uniform.

Adhesive bonding:

Before bonding, it should be inspected to see if it can be folded into 90 degrees.

Bonding surfaces must be clean, clean and free of contamination.

The glue on the bonding surface should be uniform, without accumulation and without interruption; before bonding after gluing, the curing degree of the glue must be checked by hand before bonding (generally 5~8 minutes in summer and 15 minutes in winter). ~20 minutes).

The bonding parts should be aligned, and the straight pipe should be straight and folded at a 90-degree angle; when bonding the curved pipe, first bond the outer arc plate, then the inner arc plate, and press it tightly by hand to make it Bond molding.

The bonding part should be firm, flat, and without obvious gaps.

Aluminum foil tape should be pasted at the joint outside the pipe, and the width of the two sides of the tape should be uniform, without wrinkles and damage.

install pir pre insulated duct system