How is the size of the sieve plate's edge determined?

How is the edge allowance for sieve plates determined? Generally, during the order process, we ask customers if they have any requirements regarding edge allowance. If not, a natural edge allowance is chosen. The natural edge allowance for sieve plates is typically around 1-2 cm. Of course, this isn't an absolute value, but the size of the edge allowance depends on several factors.

The edge allowance depends on the aperture and spacing of the holes, as well as the overall dimensions of the board. The position of the outermost hole determines the edge allowance. Generally, a row of holes is drilled, and the number of rows forms a board. Alternatively, the customer can provide a drawing, and production will proceed according to that drawing. Some customers require edge holes; in this case, the edge holes are punched first in the edge allowance area, and then the perforated area is punched. This results in higher precision.

Of course, some customers don't need an edge allowance; this is called a "broken edge," where the outermost hole is a broken hole. This is also achievable, at least in the case of cutting stock sieve plates, where this broken hole is inevitable, unless it's a large, uncut board.

In short, when a customer places an order, we accurately calculate the edge size of the perforated plate, confirm it with the customer, and ensure that every detail of the product is perfect.