Hydraulic Press Sinks have become a popular choice in North America due to their efficiency, affordability, and durability. Kitchen sink styles in North America have remained largely unchanged over the years, with consumers favoring simple, consistent designs. In contrast, China offers a wider variety of sink styles, constantly introducing new designs. This article will explain the main differences between stretch sinks and handmade basins, focusing on their production methods, characteristics, and the role hydraulic presses play in creating stretch sinks.
Production Process: Weld-Free vs. Welded
Stretch Sinks
Manufacturers create stretch sinks using a hydraulic press and stamping process. They place a steel plate into a mold, and the press applies force to shape the steel into the sink’s body. This process eliminates the need for welding, resulting in a seamless, weld-free sink. Even double-basin sinks can be produced as a single piece, avoiding weld seams altogether. The absence of welds makes stretch sinks more durable by reducing the risk of leaks.
Hydraulic presses ensure precision and consistency, enabling manufacturers to produce high-quality stretch sinks quickly and efficiently. This streamlined process makes it highly cost-effective for mass production.
Handmade Basins
Handmade basins require more manual labor. Workers weld steel plates together to form the sink, creating visible seams at various points. Although some export-quality handmade basins use a cross-shaped cutting method to ensure leak-proof results, weld seams remain a defining feature of handmade production.
Sink Shape and R-Angle Design
R-angle refers to the curvature of the sink’s corners. In stretch sinks, the stamping process requires larger R-angles to prevent the steel plate from cracking under pressure. As a result, stretch sinks typically have larger, rounder corners that are easier to clean but look more utilitarian.
In contrast, handmade basins allow for more flexibility in shaping the R-angle. Manufacturers can create smaller angles like R0 (right-angle), R10, or R15, giving handmade basins a more refined and elegant appearance. These smaller R-angles also maximize the usable space, making handmade basins a preferred choice for high-end kitchens.
Although stretch sinks’ larger R-angles are easier to clean, they don’t offer as much functional space or a premium look.
Consistency of Material Thickness
Stretch sinks face an issue with inconsistent material thickness. The stamping process stretches the steel plate, resulting in uneven thickness. The corners, in particular, become thinner and more prone to dents or damage. Low-quality stretch sinks can use steel as thin as 0.4mm, which compromises durability.
In contrast, handmade basins do not undergo stretching, so the material thickness remains uniform. This consistency makes handmade basins more durable and resistant to damage. Customers who prioritize quality and longevity often prefer handmade basins because of their reliable and consistent material thickness.
High-Temperature Annealing Process
To reduce the risk of cracking during production, some stretch sinks undergo a high-temperature annealing process. This process increases the steel’s flexibility, helping to prevent cracks, especially in sinks with smaller R-angles (like R20). However, annealing can cause discoloration and alter the steel’s molecular structure, affecting the sink’s final appearance.
Since handmade basins don’t require stretching, they don’t need annealing. The steel remains in its original, unaltered state, preserving its strength and structure throughout production.
Price Considerations: Cost vs. Quality
Stretch sinks are generally more affordable because manufacturers can produce them quickly and efficiently with hydraulic presses. The process uses less material and labor, making stretch sinks a great option for consumers looking for a durable, cost-effective choice.
Handmade basins, however, require more labor-intensive processes. The manual cutting, welding, and finishing work makes them more expensive. Though they cost more, handmade basins offer superior craftsmanship, elegance, and durability, making them worth the investment for customers seeking a premium product.
Choosing the Right Sink for Your Needs
Both stretch sinks and handmade basins offer distinct advantages, depending on your needs. Hydraulic press sinks are efficient, affordable, and durable. The hydraulic press enables manufacturers to produce them in large quantities while maintaining consistent quality.
On the other hand, handmade basins cater to those who value craftsmanship, aesthetic appeal, and durability. While more expensive, handmade basins offer superior quality, making them ideal for luxury kitchens.
At Jiuying, we specialize in hydraulic press machines that meet the demands of sink manufacturers. Whether you’re producing hydraulic press sinks or exploring the potential of handmade basins, our hydraulic presses deliver precision, efficiency, and top-tier results.
If you’re ready to optimize your production process or want to learn more about our hydraulic press machines, feel free to contact us. We’re here to help you create the best sinks with the latest technology.
