THE CRAFTSMANSHIP OF YKK 04

Amazing molds are the key
to slider construction!

If you look closely, sliders are made of delicate parts! The process for creating those delicate parts is packed with YKK’s technology capability.

The parts that make up a slider!

Body/Clamper/Puller

For example, if you take this slider apart, you will see that it is made up of three combined parts.

The shape is created
with a die casting method!

Most parts are made by pouring molten metal or plastic into molds carved into the parts’ respective shapes.
This manufacturing method is called “die casting.”

Die casting looks like taiyaki making!

Die casting is similar to making taiyaki, which everyone is familiar with.
Taiyaki is made by pouring batter between two iron griddles, carved into the shape of a sea bream.
Similarly, die casting involves putting two molds together and pouring material into them to create parts.

This way, we can produce parts with complex shapes all at once, in large quantities! However, there are aspects that differ greatly from making taiyaki.

Mold precision to one-hundredth of
a millimeter!

Precision machining to one-hundredth of a millimeter!

Molds are manufactured to extremely precise measurements. They need to be precise to within a mere one-hundredth of a millimeter!

Strong and long-lasting! The power of molds.

High durability!

Furthermore, the molten metal and plastic are extremely high-temperature! To maintain this level of precision, robust and durable molds are required. Mold designs are carefully considered with the material properties in mind.

The key to producing high-quality zippers lies in the creation of intricate molds! That’s why YKK also develops its molds in-house. By doing so, we maintain quality.