Knife‑Type Waterstop Welding Machine

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PVC Waterstop and Accessories

عددی

The waterstop welding machine is a tool used for joining two ends of a PVC waterstop.

It operates on a standard 220 V AC power supply.

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Key Points When Using a Knife‑Type Waterstop Welding Machine

Power Supply: Operates on standard 220 V AC.
Joint Precision: Ensure both ends of the waterstop are aligned and joined evenly and accurately to achieve proper sealing and tensile strength.

This method enables the creation of strong, reliable joints between waterstop sections, effectively preventing water leakage at connection points.

Knife‑Type Waterstop Welding Machine

The knife‑type PVC waterstop welding machine is one of the most common thermal tools for joining two ends of PVC waterstops in concrete waterproofing projects.

Physical Specifications:

Structure: Durable aluminum or steel body with heat‑resistant coating.
Design: Two semi‑circular or knife‑shaped heating plates with a center groove matching the cross‑section of the waterstop.
Weight: Typically 4 – 6 kg.
Portability: Compact, hand‑operated design enables easy transport and use on construction sites.
Operating Temperature: Adjustable between 180°C – 250°C, controlled via digital or analog thermostat.

Chemical & Material Characteristics:

Heating Plates: Made from high‑resistance alloys, reinforced against heat and corrosion.
Surface Coating: Industrial Teflon layer prevents molten PVC from sticking to the plates.
Chemical Resistance: Stable performance in environments with cement vapors, weak acids, and alkalis.
Thermal Performance: Maintains uniform heat distribution to avoid localized overheating or charring, ensuring the melted PVC ends blend evenly.

Performance Benefits:

This design results in a homogeneous melt and, upon pressing, produces a fully watertight, mechanically strong joint—ideal for execution and expansion joints in concrete waterproofing works.

Butt‑Joint Welding Procedure Using Knife‑Type Waterstop Welding Machine

Waterstop Preparation:

Position the two ends of the waterstop on either side of the machine’s heating blade, ensuring alignment to the groove profile.
Waterstop Melting:

The waterstop ends are heated and melted simultaneously on both sides of the machine’s heating blade.
Final Jointing:

Remove the welding machine and immediately press the melted ends of the waterstops together in a butt‑to‑butt position.

This produces a uniform joint that is both watertight and has suitable tensile strength.