Concrete product sealing rope | Waterproof | Long Shelf Life

Why Concrete product sealing rope Is Essential?

During pipe pile production, concrete mixture is poured into the lower steel mold half. The upper mold half is then positioned, and the assembly undergoes high-speed centrifugal spinning.

Sealing Mechanism:

Concrete product sealing rope is placed in the dovetail groove of the lower mold. When the upper mold closes, its protruding dovetail compresses the rope against the lower groove, forming a sealed contact. This prevents slurry leakage during centrifugation, ensuring:
Elimination of honeycombing defects in pile concrete
Prevention of product rejection due to leakage-induced voids

Function:

1. Concrete product sealing rope primarily prevents slurry from leaking out of the mold.
2. How to Use Pipe Pile Rope:
Prevent the mold opening, then close the mold, pressing the rope between the upper and lower mold openings.
3. Specifications:
Sealing rope comes in different thicknesses, with 13 and 17 strands.

Advantages of  sealing rope:

1. Uniform diameter, exceptional tensile strength, and superior sealing efficacy.
2.Sealing rope offer inventory-friendly storage with inherent safety.
3. Statistically proven，cotton strings have lower actual cost versus grass ropes—which incur material wastage, productivity loss, higher defect rates, and rework hours.

Compared to straw rope, pipe pile rope can:
① Reduce material loss;
② Reduce mold cleaning time;
③ Improve yield rate

Common Causes of Slurry Leakage:

Causes of Slurry Leakage at Pile Body Seams:

A. Steel mold deformation, resulting in gaps at the upper/lower mold dovetail joints that cannot be fully closed by external force.
B. Incomplete cleaning of residue from the upper/lower mold dovetail joints.
C. Accidental inclusion of cement slurry or spilled concrete in the dovetail joints after mold covering during feeding (when molds are open).
D. Asymmetrical sequence or direction during bolt tightening when closing the molds.
E. Missing bolts for mold closure.
F. Mold bouncing during centrifugation due to centrifuge or mold issues.
G. Concrete bleeding characteristics.

Causes of Slurry Leakage at the Joint Between Pile Sleeve and Pile Body:

A. Incomplete cleaning around the end-plate sleeve area of the upper/lower mold cylinders.
B. Deformation of the outer diameter of the end-plate sleeve skirt, creating gaps with the mold.
C. Non-standard D2 dimension (bell mouth) of the end-plate sleeve skirt.