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What is Perforated Metal

パンチングメタルとは
A perforated metal, also called a punched metal, is manufactured by punching (perforating) a material, particularly a metal.
The applications of punched metals are wide, such as filter mesh and monument requiring high design quality.
Although a perforated metal is generally regarded as a kind of metal mesh, punching of any locations on metal is possible and bending and after-processing (e.g. hole processing) are easy. Compared with lath and crimp wire netting, perforated metals are processable without concavity or convexity.
Burring for making protrusive holes is also possible. As a dedicated perforated metal manufacturer, Uchinuki provides technical advices and consistent services such as mold manufacturing, punching-related secondary and tertiary processing and panel product manufacture. Uchinuki is actively developing new techniques such as Uchinuki graphic punching (UGP) system, knit/net-type punching series and the processing of materials in addition to metals.
Automatic calculation of hole area rate

Applications and materials

Building exterior Exterior panels in general, blind panel, balcony handrail, staircase blindfold, monument, soundproof walls for road, and signboards
Building interior Ceiling panel, wall panel, partition screen and interior panel
Automobile Speaker cover and muffler
Home electrical appliances Speaker cover, heat dissipation cover, lighting cover, range hood filter, and for other filters.
Processing material Punching of the following is possible: steel, aluminum, stainless steel, copper, titan, aluminum composite plate, other metals, PVC sheet, and other types of panels. Please consult us.
Perforated metals Examples

Hole arrangement and punching methods

Punching patterns and feeding directions

Punching patterns and feeding directions

・Metal mold and hole arrangement for 60° houndstooth punching
Mold arrangement in the case of houndstooth punching is shown in the right figure.
In this case, the shape of the first-perforated holes and that of last-perforated holes at both ends are different (holes are made asymmetrically) as shown in Figure 1.
Therefore, in the case of houndstooth pattern with different end shapes as shown in Figure 2, a one-line backfill is necessary.

[Figure 1] Asymmetrical houndstooth punching

[Figure 1] Asymmetrical houndstooth punching

[Figure 2] Symmetrical houndstooth punching

[Figure 2] Symmetrical houndstooth punching

Houndstooth (staggered) punching and reverse houndstooth (staggered) punching

As shown in Figure 3, holes in the direction of shorter sides of the plate show a zigzag pattern, and the longer sides are feed direction.
Figure 4 shows a punching method different from that in Figure 3.

[Figure 3]　Normal houndstooth (staggered) punching

[Figure 3]　Normal houndstooth (staggered) punching

[Figure 4] Reverse staggered (staggered) punching

[Drawing 4] Reverse staggered (staggered) punching

Series punching (parallel punching)

In the case of series punching, if the hole interval has no problem, a one-line mold is used as shown in Figure 5.

[Figure 5]

[Figure 5]

Skipping type

When the pitch is extremely narrow because of the relation between plate thickness and holes, processing may be difficult. In such a case, we use a skipping-type mold as shown in the figure before punching. Even after skipping-type punching, it is possible to manually fill holes to create a non-skipping pattern.

[Figure 6] Skipping pattern

[Figure 6] Skipping pattern

[Figure 7] Non-skipping pattern

[Figure 7] Non-skipping pattern

Margin

After punching, it is possible to maintain margins at the edges of the material.
There is a case where four margins remain at the four sides of the material and a case where margins remain partially such as in width direction.
Regarding margin size, please designate the distance from hole edge to material edge or from hole center to material edge. It may be necessary to modify size requested by customer because of limitation in terms of mold size or punching pattern.

Margin

Automatic calculation of hole area rate

  Automatic calculation of hole area rate Back calculation of pitch on the basis of hole diameter and hole area rate Back calculation of hole diameter on the basis of pitch and hole area rate

Round perforation 60°

hole diameter：
pitch：
 
rate of hole area（%）：
hole diameter：
rate of hole area（%）：
 
pitch1：
pitch2：
Bar：
pitch1：
rate of hole area（%）：
 
hole diameter：
pitch2：
Bar：

Round perforation square　holes, staggered 45

hole diameter：
pitch：
 
rate of hole area（%）：
hole diameter：
rate of hole area（%）：
 
pitch：
Bar1：
Bar2：
pitch：
rate of hole area（%）：
 
hole diameter：
Bar1：
Bar2：

Round/square holes Series punching 90°

hole diameter：
pitch：
 
rate of hole area（%）：
hole diameter：
rate of hole area（%）：
 
pitch：
Bar：
pitch：
rate of hole area（%）：
 
hole diameter：
Bar：

Round/square holes series punching (parallel)

hole diameter：
pitch：
 
rate of hole area（%）：
hole diameter：
rate of hole area（%）：
 
pitch：
Bar：
pitch：
rate of hole area（%）：
 
hole diameter：
Bar：

Square holes houndstooth punching

hole diameter：
pitch1：
pitch2：
 
rate of hole area（%）：
hole diameter：
rate of hole area（%）：
 
pitch1：
pitch2：
Bar：
pitch：
rate of hole area（%）：
 
hole diameter：
pitch2：
Bar：

Long holes (slots) houndstooth punching

W：
L1：
S：
L2：
 
rate of hole area（%）：
Hole width：
Hole length：
Vertical pitch：
rate of hole area（%）：
 
Horizontal pitch：
Vertical pitch
Bar ：
Horizontal pitch
Bar ：
Hole width：
Hole length：
Horizontal pitch：
rate of hole area（%）：
 
Vertical pitch：
Vertical pitch
Bar ：
Horizontal pitch
Bar ：

Long holes series punching (parallel)

W：
L1：
S：
L2：
 
rate of hole area（%）：
Hole width：
Hole length：
Vertical pitch：
rate of hole area（%）：
 
Horizontal pitch：
Vertical pitch
Bar ：
Horizontal pitch
Bar ：
Hole width：
Hole length：
Horizontal pitch：
rate of hole area（%）：
 
Vertical pitch：
Vertical pitch
Bar ：
Horizontal pitch
Bar ：
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