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What is perforated metal?

Origins

The origins of perforated metal in Japan go back to the early 20th century when metal sheets were punched to produce stronger substitute for the wire netting used for sifting macadam or lodestone until then.

At the time, it was referred to as ‘punched wire netting’ in Japanese, but it was not until between 1955 and 1965 when the demand for transistor radio speaker nets boomed that perforated screens entered people’s consciousness. In the 1980s, ‘punched wire netting’ was used as a building material in railings and partitions and it became better known as ‘punch metal’ in Japanese.


Later, as die making advanced, it became possible to perforate broad screens of 914 mm and 1,219 mm in width in one press. Mass production evolved and manufacturers could stock cheaper perforated screens of standard lengths and of an even better quality. With the proliferation of numerically controlled machines, precision further increased and it became possible to set more detailed punching dimensions.


Functionality

Perforated screens are made by punching iron, steel, stainless steel, aluminum, and other metal sheets using pressing machines. They are especially effective when a metal’s strength is required, but they are also effective for sorting and filtering water, air, light, sound, salt, sugar, and other particles and objects.


Uses

The following are examples of how perforated screens can be used.

Separation and dehydration Dehydrate solids and separate any size of particle from granules to fine matter.
Filtering Extract impurities in the food and other fields, such as waste liquid treatment.
Drying Continuously dry slurry and extract dispersed solids.
Sorting Sift fine particles, which pass through the screen, from coarse particles, which do not.
Grinding, granulation Grind more finely and produce uniform granules by physically applying force.
Conveyance The bottom boards of conveyors and sliders used in the manufacturing and distribution industries.