JPH01289700A - Cutter device for information recording medium - Google Patents

Abstract

PURPOSE:To prevent a foundation plate from damage and crack initiation, enhance its durability, and not to produce burrs or sags on the cutting surface by providing the foundation plate with a groove having a section similar to the section of a cutting edge, and filling this groove with resin. CONSTITUTION:A card base-material 3 is placed on a foundation plate 4 and cut by a cutting edge 1. At this time, this foundation plate 4 is equipped with a groove 5 having a section similar to the section of the cutting edge, and this groove 5 lessens elastic deformation of the card base-material 3 at the time of cutting. Further this groove 5 is filled with polyurethane rubber 2a with a hardness of 70-80 degrees, and its appropriate elastic deformation absorbs biting-in of the cutting edge at the time of cutting to lessen further the elastic deformation of the card base-material 3, and the cutting surface is prevented from production of sags and burrs.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to an information recording medium cutting device.

[Prior Art] Conventionally, the method of cutting a card base material to match the shape of an information recording medium (hereinafter referred to as a cart) is to place the card base material on a bottom plate and cut it with a cutting blade. is being done. For the bottom plate, a thick resin plate, for example, a hard resin material such as hard PVC or polycarbonate, or a soft metal plate such as aluminum or brass is used.

In addition, as a variation of the male and female types, there is also known a floor plate with a groove provided in the portion that receives the cutting blade. Furthermore, as shown in FIG. 5, a square groove 5 is provided in the portion of the bottom plate 4 that receives the cutting blade l, the groove 5 is filled with a soft resin 2, and the cart base material 3 is placed on top of the groove 5. A type of strainer that is strained and cut with a cutting blade 1 is also known.

[Problems to be Solved by the Invention] However, the above conventional example has the following drawbacks. That is, when a hard resin material is used for the floor plate, scratches and cracks are likely to occur due to the cutting blade biting in, and the durability is poor, making it necessary to frequently replace the floor plate, resulting in high costs.

In addition, when a soft metal plate is used for the bottom plate, it is more durable than a hard resin material, but scratches occur, and the scratches cause scratches on the card, and cutting performance is reduced due to the cutting edge of the card.

On the other hand, if the blade holder of the bottom plate has a groove, are there any problems with chipping of the cutting edge of the cutting blade or scratches on the bottom plate? The degree of change is large, and the cut surface may sag or crack.
There is a drawback that it leads to poor running of the card within the reader/writer (R/W).

Furthermore, when the rectangular grooves provided in the bottom plate are filled with soft resin, the soft resin material and its rubber hardness may cause elastic deformation of the card base material, sagging of the cut surface, generation of firmness, and scratches on the filler material. It is difficult to select the material because defects such as cracks may occur, and the cross section of the groove is large due to its rectangular shape, which increases the elastic deformation of the filler and reduces the elasticity of the card base material. The disadvantage is that the deformation becomes large.

The present invention has been made in order to improve the shortcomings of the conventional technology. It is an object of the present invention to provide a cart cutting device that prevents chipping and also prevents the occurrence of sag, cracks, etc. on the cut surface.

[Means for Solving the Problems] That is, the present invention provides a cutting blade formed hollow to match the shape of a card to be cut, and a cutter having a planar shape matching the outer peripheral shape of the cutting blade. The card cutting device is characterized in that the cross-sectional shape of the groove is similar to the cross-sectional shape of the cutting blade, and the inside of the groove is filled with resin.

In the present invention, the resin filled inside the groove has a rubber hardness of 8
It is preferable to use a resin with a two-layer structure consisting of polyurethane rubber with a hardness of 0 to 95 degrees, or polyurethane rubber with a rubber hardness of 70 to 80 degrees in the lower part of the groove, and polyurethane rubber with a hardness of 90 to 95 degrees in the upper part of the groove. Rubber hardness 80
If the rubber hardness is less than 95 degrees, the elastic deformation of the card base material will be large and the cut surface will sag and become large. It is undesirable because it becomes deficient in

[Function] The card cutting device of the present invention is provided with a groove having a cross-sectional shape similar to the cross-sectional shape of the cutting blade in the bottom plate, thereby minimizing elastic deformation of the card base material during cutting. Polyurethane rubber with a rubber hardness of about 80 to 95 degrees, or rubber hardness of about 70 to 80 degrees at the bottom of the groove, and rubber hardness 90 to 9 at the top of the groove.
By filling with a two-layer resin made of polyurethane rubber with a diameter of about 5 degrees, the biting of the cutting edge during cutting is absorbed by appropriate elastic deformation, further reducing the elastic deformation of the cart base material, and preventing sag on the cut surface. This prevents the occurrence of firmness, cracking of the filler material, and chipping of the cutting edge of the cutting blade.

[Example] Hereinafter, the present invention will be described in more detail based on the example shown in the drawings.

Embodiment 1 FIG. 1 is an explanatory diagram showing one embodiment of the card cutting device of the present invention, FIG. 2 is a plan view of a bottom plate, FIG. 3(a) is a perspective view of a cutting blade, and FIG. b) is an end view taken along line AA. In the figure, the card cutting device of the present invention has a hollow cutting blade l formed to match the rectangular shape of the cart to be cut, and a similar shaped cutting blade l that matches the outer peripheral shape of the cutting blade l. The bottom plate 4 has a groove 5 having a planar shape, and the cross-sectional shape of the groove 5 is formed into a triangular shape similar to the acute-angled triangular cross-sectional shape of the tip of the cutting blade l. is filled with polyurethane rubber 2a having a rubber hardness of about 80 to 95 degrees. Further, the cutting blade l is formed so that the radius R is R2600, which is equivalent to the card shape.

The cutting blade l is not particularly limited, and may be a normal punching blade, such as a hollow blade made of high-speed steel or carbide, a hollow blade, or the like.

The bottom plate 4 is made of high speed steel or carbide.

The card base material 3 is made of, for example, PMMA, polycarbonate resin, polysulfone, polyphenylene oxide, or the like.

Next, a method of cutting a card using the cutting device will be described. The cutting blade 1 falling vertically onto the card base material cuts the cart base material 3 while being elastically deformed, and is received on the polyurethane rubber 2a. cutting is completed. If the resin filled in the groove 5 has a high hardness, scratches or cracks will occur in the resin due to the blade digging into the resin, and if the hardness is low, the cutting stroke will increase, although it is less than when there is no filler. This results in sag, cracks, etc. on the cut surface. However, as in this example, by forming the groove shape to be similar to the cross-sectional shape of the cutting blade and filling it with polyurethane rubber with a rubber hardness of about 80 to 95 degrees, the biting of the cutting edge can be prevented by appropriate elastic deformation. It absorbs the material, improves the durability of the floorboard, and prevents sag and stiffness when cutting.

Embodiment 2 FIG. 4 is an explanatory diagram showing another embodiment of the cart cutting device of the present invention. In the figure, the resin filled in the groove 5 is a low-hardness polyurethane rubber 2c with a rubber hardness of 70 to 80 degrees in the lower part of the groove, and a rubber hardness of 90 degrees in the second part of the groove.
An example of a device using a resin with a two-layer structure made of high hardness polyurethane rubber 2b with a hardness of ~95 degrees will be shown.

In this embodiment, after the cutting blade l cuts the card base material 3, the cutting blade l is embedded into the resin layer of the bottom plate 4, which is the part, to complete the cutting, or the low hardness polyurethane at the bottom of the groove of the two-layer structure is used. The rubber layer side absorbs the biting force through elastic deformation and prevents scratches on the high hardness polyurethane rubber layer at the top of the groove. In other words, in this embodiment, scratches and cracks on the cutting edge that occur when a hard resin material is used as a blade rest are absorbed by the two-layered layer with low hardness and large elastic deformation.
To provide a bottom plate used for cutting carts that has excellent cutting performance and durability.

[Effect of the invention] As explained above, the card cutting device for 1 unreleased IJI forms a groove in the bottom plate with a similar cross-sectional shape to the cutting blade, and fills the inside of the groove with one or two layers of polyurethane rubber. By doing this, you can prevent scratches and cracks on the floorboard and improve its durability.
It improves the cutting performance of the cart base material and provides cards with no crisp or sagging edges.

■Since there is no sharpness or sag on the cut surface, it is possible to use Reader Writer (R).
/W) stabilizes the card running during recording and playback, resulting in a stable signal.

■Since there is no stiffness, less dust is generated and the error rate during recording and playback can be reduced.

■The joint surface is fragile.

There are effects such as

[Brief explanation of the drawing]

Fig. 1 is an explanatory view showing one embodiment of the card cutting device of the present invention, Fig. 2 is a plan view of the bottom plate, Fig. 3(a) is a perspective view of the cutting blade, and Fig. 3(b) is AA line end view, t54 diagram is an explanatory diagram showing another example of the cart cutting device, and tJS
FIG. 5 is an explanatory diagram showing a conventional example of a cutting device for a cart. l...Cutting blade 2...Soft resin 2a...
・Polyurethane rubber 2b... High hardness polyurethane rubber 2c... Low hardness polyurethane rubber 3... Card base material 4... Bottom plate 5... Groove

Claims (3)

[Claims] (1) A cutting blade formed in a hollow shape to match the shape of the information recording medium to be cut, and a bottom plate having a planar groove that matches the outer peripheral shape of the cutting blade, and a cross section of the groove. A cutting device for an information recording medium, characterized in that the shape is similar to the cross-sectional shape of a cutting blade, and the groove is filled with resin. (2) The information recording medium cutting device according to claim 1, wherein the resin is polyurethane rubber with a rubber hardness of 80 to 95 degrees. (3) The resin is polyurethane rubber with a rubber hardness of 70 to 80 degrees at the bottom of the groove, and a rubber hardness of 90 to 9 at the top of the groove.
2. The information recording medium cutting device according to claim 1, wherein the cutting device is a two-layered resin made of 5% polyurethane rubber.