JPH09556U - Rubber block cutting device - Google Patents

Abstract

(57) [Abstract] (Correction) [PROBLEMS] To provide a cutting device that automates the cutting of a rubber block without manual work, and realizes safe and stable quality and improved productivity. A cutting cutter, which is a metal plate or a fine ceramics plate with the vicinity of a vertex of a rectangular shape removed, and whose side is a cutting blade, is attached as a rubber block cutting cutter.

Description

[Detailed description of the device]

[0001]

[Technical field to which the invention belongs]

 The present invention provides a rubber block, in particular, a rubber block such as a laminated silicone rubber block in which a conductive rubber sheet or a light-shielding rubber sheet and an insulating rubber sheet or a transparent rubber sheet are alternately laminated in a predetermined size or shape. The present invention relates to a rubber block cutting device (hereinafter, simply referred to as a cutting device) for cutting into pieces.

[0002]

[Prior art]

 Generally, a rubber block cutting device is often equipped with a rotary disc blade, but elastic rubbers such as silicone rubber, nitrile rubber, urethane rubber, and natural rubber having a hardness in the range of 15 to 80 ° H. Since the elastic rubber inside has a large frictional resistance, it cannot be cut smoothly by using a rotating disc blade.

[0003]

[Problems to be solved by the device]

 Conventionally, a flat knife was used to manually cut a rubber block, but since the knife is thin and thin and has poor sharpness, the cutting line meanders and bends the cutting surface, cutting it into the specified shape or size. It was virtually impossible to do. As a result, the shape of the cut rubber block was different, and it was difficult to obtain the required shape or size even when trying to stack this on a larger rubber block. Further, it was practically impossible to cut a rubber block having a thickness exceeding 30 mm, and the work efficiency was low.

In order to manufacture a so-called zebra-type connector which is indispensable for a display device such as an LCD in recent years, first, an insulating rubber sheet and a conductive rubber sheet are alternately laminated to form a rubber block having a thickness of 10 to 30 mm. Must be manufactured and cut vertically and horizontally so as to have a shape having a predetermined set dimension. In this case, it is required that the cut surfaces are parallel planes and have precise dimension intervals.

[0005]

[Means for Solving the Problems]

 The present invention aims to provide a cutting device that automates the cutting of rubber blocks without any manual work, and realizes safe and stable quality and improved productivity. A gist of a rubber block cutting device, which comprises a plate or a fine ceramics plate, and a cutting cutter whose side is a cutting blade is attached as a rubber block cutting cutter (hereinafter, simply referred to as a cutter). Preferably, the cross section of the cutting blade of the attached cutter has a wedge shape having a relief angle β selected from the range of 2 to 6 ° following a cutting edge angle α selected from the range of 11 to 17 °. Have By using a cutting device equipped with a cutter having such a material and shape, a rubber block made of elastic rubber such as silicone rubber, nitrile rubber, urethane rubber, natural rubber or the like having a hardness of 15 to 80 ° H. However, it can be cut accurately and smoothly.

[0006]

[Embodiment of the invention]

 First, the cutting device of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a cutter attached to the cutting device of the present invention. As shown in FIGS. 1 (a) and 1 (b), a metal plate or a fine ceramics plate with a thickness T is processed into a triangle, and the vicinity of the apex 3 described later is removed or not removed and cut into each side. The blade 2 is formed. As shown in Fig. 1 (c), the cross section of the blade has a wedge shape with a cutting edge angle of α, but before the blade has a thickness of T toward the center of the cutter, the inclination is gentle and the clearance angle is large. It has a part forming β. This is to reduce friction in the moving direction of the cutter and to cut the rubber block smoothly. Therefore, in order to make it easier to cut the rubber block and at the same time increase the durability of the cutting blade, the cutting edge angle α is 11 to 17 °, the clearance angle β is 2 to 6 °, and the thickness T is 2 to 3 mm. preferable. In the case of elastic rubber, it is more preferable that the cutting edge angle α is 13 to 15 ° and the relief angle β is 2 to 3 °. If each vertex 3 of the triangle is not removed, it is partially removed and the blade is processed to prevent chipping, but the effective width W of the cutting blade is usually from the viewpoint of rubber block thickness and device miniaturization. Is preferably up to 300 mm. Further, an opening 4 for fitting the holding shaft 9 (see FIG. 2) and a fixing screw hole 5 are provided in the center of the cutter.

As shown in FIGS. 1D and 1E, the apex angle γ of the cutter 1 obtained by removing the vicinity of the apex of the triangle is the same as that of the cutting blade 2 when moving and cutting the rubber block 6. It has a relation of θ = 90 ° −γ / 2 with the inclination between the surfaces of the rubber block 6, that is, the bias angle θ, and the bias angle θ has an important relation with the sharpness of the cutting blade by the cutter. Therefore, the apex angle γ is 60 °, that is, the standard is the case where the entire cutter removes the vicinity of the apex of an equilateral triangle. For example, in order to prevent the rubber block from escaping, it is preferably selected from the range of 30 to 50 °. Further, when the holding shaft is finely turned, the cutter is tilted, and the bias angle θ is changed, so that the sharpness of the cutter can be finely adjusted, and when it is turned 120 °, the cutting blade on the adjacent side can be replaced. The material of the cutter is generally steel, but a fine ceramic material that is harder and has less wear may be used.

Next, an example of the cutting device of the present invention will be described in detail with reference to FIG. In FIGS. 2A and 2B, the cutter holding portion 7 is fixed on the base 8, the cutter 1 is inserted into the holding shaft 9 at the opening 4, and is screwed by the screw hole 5. The angle of the bias angle θ of the holding shaft 9 is finely adjusted by the cutting blade angle adjusting motor 10 via the shaft 11 and the gear box 12. The rubber block 6 to be cut is fixed on the slide table 13 by fixing fittings 14. The slide table 13 is slidable on a rail 15 laid on the base 8, and is grasped by a holding metal fitting 18 fixed to the slide table with a feed screw 17 housed in a groove 16 formed in a lengthwise direction on the surface of the base 8. When the feed screw 17 is rotated by the slide table drive motor 19, the slide table 13 can reciprocate on the base 8 in the longitudinal direction thereof. The moving speed of the slide table 13 is usually adjusted to a value selected from the range of 50 to 200 mm / sec depending on the hardness of the rubber block. Reference numeral 20 denotes a rotary cylinder of the slide table 13, which is rotated by 90 ° when the slide table 13 passes the cutter holder 7 and reaches the left end, and is moved in a direction opposite to the direction in which the slide table 13 has been moved. Cutting is performed with the cutting blade on the side adjacent to the side of the used cutting blade 2.

[0009]

【Example】

As shown in Figs. 2 (a) and 2 (b), transparent silicone rubber sheets and transparent silicone rubber sheets having different bending ratios are alternately laminated in vertical, horizontal, and thicknesses of 600 mm and 400 mm, respectively. , 50 mm S-type silicone rubber block 6 was fixed on a slide table 13 having a length of 800 mm and a width of 600 mm by fixing fittings 14. The cutter 1 is made of SKH having a hardness of HS80 to 85 °, and has three cutters with T = 2 mm, α = 15 °, β = 2 °, and W = 300 mm with the apex cut by 5 mm, biased 295 mm apart. It was fixed to the holding shaft 9 so that the angle was 50 °. The slide table 13 back and forth on the base 8 at a speed of 100 mm / sec, the rubber blocks 6 vertical 295 mm, was possible and cut child in two rubber blocks in the lateral 200 mm. Moreover, the cut surface was a clean flat surface and no chips were generated.

[0010]

[Effect of the invention]

 Since the cutter used in the cutting device of the present invention has a cutting blade on each side of the triangle with the vicinity of the apex removed and has a higher rigidity than the conventional flat knife, it does not meander and can perform accurate cutting. Since the apex angle of the cutter can be adjusted according to the hardness of the rubber block, and the cutting can be done more smoothly, the cutter attachment part can be reciprocated to efficiently cut the rubber block with the adjacent cutting blades. The rubber block can be cut smoothly by finely adjusting the bias angle. Furthermore, by rotating the holding shaft by 120 °, the cutting blades formed on each side of the cutter can be used for sequential feeding, the life of the cutter is long, the cutting device is safe, and the cutting quality is extremely excellent.

[Brief description of drawings]

1A is a plan view of a cutter used in the present invention, FIG. 1B is a front view thereof, FIG. 1C is a sectional view taken along line XX of FIG. 1A, and FIG. A side view of the vicinity of a cutter blade tip, (e) is a sectional view showing the vicinity of a cutter blade tip during cutting.

FIG. 2 shows a cutting device of the present invention, (a) is a front view thereof, and (b) is a plan view thereof.

[Explanation of symbols]

 1 ... Cutter 2 ... Cutting blade 3 ... Apex 4 ... Opening 5 ... Screw hole 6 ... Rubber block 7 ... Cutter holding part 8 ... Base 9 ... Holding shaft 10 ... Cutting angle adjusting motor 11 ... Shaft 12 ... Gear box 13 ... Slide table 14 ... Fixing fitting 15 ... Rail 16 ... Groove 17 ... Feed screw 18 ... Grip fitting 19 ... Slide table drive motor 20 ... Rotating cylinder

Claims (1)

[Utility model registration claims] 1. A rubber block cutting device comprising a metal plate or a fine ceramic plate from which the vicinity of a vertex of a polygon is removed, and a cutting cutter having a cutting edge on a side is mounted as a rubber block cutting cutter. ..