JPH06218691A - Cutting machine - Google Patents

Abstract

PURPOSE:To permit the cut free from the generation of burrs by using a round cutter having the specific dimension as upper cutter and forming a rectangular groove which has the specific dimension and is meshed in noncontact form with the round cutter, on a lower cutter, as for a cutting machine which consists of the upper and lower cutters and cuts a thin plate. CONSTITUTION:An upper cutter 1 of a cutting machine is supported in a turnable manner through a bearing on an arm 7 which slides on a guide rail 4, and is moved in reciprocation along the guide rail 4 by the revolution of a screw shaft by a motor, and as the upper cutter 1, is used a round cutter having a thickness of 0.1-0.5mm, diameter of 40-200mm, and an apex angle of 10-30 deg.. While, a lower cutter 2 consists of a round cutter 1 having a rectangular groove 3 having a meshed width of 0.1-0.5mm in a noncontact form, and the meshing depth with the round cutter 1 is set to 0.1-1mm. Accordingly, the cutting machine which can cut a thin plate 6, in particular a copper foil for printed wiring plate to a beautiful cut surface free from the generation of burrs, and the easy maintenance can be obtained at low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin plate, and more particularly to a copper foil cutting machine having a thickness of 100 μm or less for printed wiring.

[0002]

2. Description of the Related Art The thickness for printed wiring boards these days is 100μ.
The production volume of copper foil with a size of m or less has been increasing year by year, and the improvement of its quality has been strongly desired.
As a copper foil for printed wiring, in addition to basic properties such as contact strength with the substrate, tensile strength of the copper foil itself, elongation and bending strength, in recent years, the finely cut surface of the further cut copper foil has Defects have become a big problem.

The inventors of the present invention have found that burrs generated on the cut surface of a copper foil,
In other words, we proposed a cutting machine that can reduce galling and cutting scraps (hereinafter simply referred to as “burrs”) on the cutting surface to 5 μm or less. (Japanese Patent Laid-Open No. 61-109694) In this cutting machine, the upper blade is a round blade and the lower blade is an elongated blade having a trapezoidal or rectangular cross section so that the clearance between the upper blade and the lower blade is always zero. It is a cutting machine. However, although the above-mentioned conventional cutting machine certainly has a clearance of 0, when the upper blade or the lower blade has a defect such as a crack, burrs may occur on the cut copper foil.

[0004]

SUMMARY OF THE INVENTION According to the present invention, in order to improve the defects of the above-mentioned conventional cutting machine, in the course of various examinations, the upper blade and the lower blade are brought into non-contact with each other to cause burrs. The inventors have found that the above can be prevented and completed the present invention.

[0005]

Means for Solving the Problems That is, the present invention is a cutting machine comprising an upper blade and a lower blade for cutting a thin plate, wherein the upper blade is freely rotatable and has a thickness of 0.1 to 0.5 mm and a diameter of 40 mm. ~ 200 mm, 10 ~ 30 mm edge angle round blade, the lower blade has a rectangular cross section, 0.1 ~ 0.5 mm width groove, the groove and the round blade mesh without contact, this engagement depth The cutting machine is characterized by having a size of 0 to 1 mm.

The present invention will be described in detail with reference to FIGS. 1 and 2. The upper blade 1 is held by an arm 7 which slides on a guide rail 4 so as to rotate freely, and the lower blade 2 is rectangular and has a rectangular shape. ~ 0.
The groove 3 has a width of 5 mm and has a length equal to or larger than the width of the thin plate 6.
By moving the arm 7, the upper blade 1 moves along the groove 3 in a non-contact manner while engaging with the groove 3 of the lower blade 2.
When the thin plate 6 is not placed, the upper blade 1 does not rotate.

When the thin plate 6 is placed on the lower blade 2, a torque is applied to the upper blade 1 by the contact with the thin plate 6 to rotate the upper blade 1. As the upper blade 1 rotates and moves, the thin plate 6 receives the shearing force from above and is cut. At this time, the thin plate 6 is on the groove 3 of the lower blade 2 and tries to withstand this shearing force as a tension. Therefore, if this groove width is wide, the thin plate 6 naturally loses its strength as a chip, falls into the groove and cannot receive shearing force, and is not cut. Thin plate 6
If the width of the groove 3 is 0.5mm or less, it is usually 35
The copper foil of ~ 9 μm works sufficiently as a support for both ends and is cut by the shearing force of the upper blade 1.

The upper blade 1 used in the present invention has a diameter of 40 to 200 mm.
To If this diameter is 40 mm or less, the shearing force applied from the vertical direction to the horizontal direction when cutting a thin plate,
There is an inconvenience that wrinkles are generated in the thin plate. On the other hand, if the thickness is 200 mm or more, it is economically disadvantageous, and at the same time, if the thickness is thin, it is difficult to handle due to bending or the like.

Although the thickness of the upper blade is limited to 0.1 to 0.5 mm,
If the thickness is 0.1 mm or less, it is difficult to handle due to bending and the like. Especially, in the case of copper foil, when the thickness thereof is thick, the stress applied to the upper blade 1 becomes large and the upper blade may be bent. On the other hand, when the thickness is 0.5 mm or more, when a thin plate is cut, bending occurs on the cutting surface, and particularly when cutting a copper foil with a thickness of 10 μm, bending occurs on the cutting surface of the copper foil. It is not preferable because there is.

The apex angle Θ of the upper blade 1 must be 10 to 30 °. If the angle is less than 10 °, blade cutting or bending may occur when cutting a thin plate. On the other hand, when the angle is 30 ° or more, the resistance at the time of cutting increases, and the cutting surface of the thin plate is bent, which is not preferable. Further, it is preferable that the cross section of the blade is V-shaped, that is, both sequins are symmetrical. In the case of asymmetry, one of the thin plates may wavy.

Although the upper blade 1 is held by the arm 7 so as to rotate freely, it is not preferable to give power to the upper blade 1 to rotate it. This is to minimize the contact resistance between the upper blade 1 and the thin plate 6. If this contact resistance becomes large, especially when the thin plate is a copper foil, galling occurs with the upper blade 1 and burrs are generated, which is not preferable.

The depth of engagement between the upper blade 1 and the lower blade 2 is 0 to 1
mm. When the engagement depth is 0 or less, that is, when the upper blade 1 does not pass through the thin plate 6, the thin plate 6 is not cut, or a cut burr is often generated, which is not preferable. On the other hand, if the engagement depth becomes deep, the shearing force applied to the thin plate changes from the vertical direction to the horizontal direction in relation to the diameter of the upper blade 1, which causes wrinkling of the thin plate, which is not preferable. This engagement depth is limited to 1 mm when the upper blade 1 has a minimum diameter of 40 mm, and if it is deeper than this, wrinkles will occur when the thin plate is a copper foil.

The cutting machine of the present invention has been described above with respect to the upper blade 1 and the lower blade 2. However, with respect to the movement of the arm 7, the conveyance of the thin plate 6, etc., an appropriately selected device can be selected. For example, the movement of the arm 7 can be carried out by a transfer using an air cylinder when the distance is short and a device using a screw or a chain when the distance is long. Further, the thin plate may be conveyed by using a conveying arm in the case of a single plate and by using a pinch roll or the like in the case of continuous.

[0014]

【Example】

Example With the cutting machine shown in FIGS. 1 and 2, the upper blade thickness is 0.25 mm, the diameter is 40 mm, the apex angle is 17 °, the lower blade length is 1100 mm, the groove width is 0.3 mm, and the engagement depth of the upper blade and the lower blade is 0.5 mm. Using, a 18 μm copper foil was cut to 30000 mm. As a result,
No flash was observed in the final cutting.

Comparative Example A known cutting machine shown in FIG. 3 (described in Japanese Patent Application Laid-Open No. 61-109694) was used to obtain a copper foil having a thickness of 5 mm and a diameter of 100 mm. As a result of cutting, three burrs of about 5 μm were found in the last cutting.

[0016]

In the cutting machine of the present invention, the upper blade and the lower blade cut the thin plate without making contact with each other, so that the conventional galling due to the contact between the blades does not occur. This eliminates the need for blade maintenance and extends blade life. Further, since it does not cause burrs, it is particularly useful as a cutting machine for copper foil for printed wiring boards.

[0017]

The cutting machine of the present invention can cut a thin plate having a beautiful cutting surface, especially a copper foil for a printed wiring board, with only one round upper blade and a lower blade having a groove, and the operating cost can be reduced. Low cutting cost, easy maintenance and low production cost.

[Brief description of drawings]

FIG. 1 is a side view of a cutting machine according to the present invention.

FIG. 2 is a sectional view of a cutting machine of the present invention.

FIG. 3 is a side view of a cutting machine disclosed in JP-A-61-110994.

[Explanation of symbols]

 1 Upper Blade 2 Lower Blade 3 Groove 4 Guide Rail 5 Bearing 6 Thin Plate 7 Arm Θ Apex Angle 10 Round Blade 20 Fixed Blade 30 Thin Plate 40 Spring

Claims (1)

[Claims] 1. A cutting machine comprising an upper blade and a lower blade for cutting a thin plate, wherein the upper blade is freely rotatable and has a thickness of 0.1 to 0.5 mm, a diameter of 40 to 200 mm, and an apex angle of 10 to 30 °. The lower blade has a rectangular cross section and has a groove with a width of 0.1 to 0.5 mm, the groove and the circular blade are intermeshing without contact, and the engagement depth is 0 to 1 mm. A cutting machine characterized by.