KR970006329Y1 - Die cutting machine of rotary type - Google Patents

Abstract

none

Description

Rotary die cutting machine

1 is a schematic view of a rotary die cutting machine according to the present invention.

2 is a cross-sectional view of the die cylinder and anvil cylinder of FIG.

3 is a partially enlarged perspective view of FIG.

4A-4C illustrate a step of blanking material and

5 is a partial cutaway perspective view of a floppy disk.

* Description of the symbols for the main parts of the drawings *

A: Liner 1: Case

2: protect plate 3: storage medium

10: die cylinder 11: knife plate (knife plate)

12: blade 13: elastic member

20: anvil cylinder 21: adsorption port (adsorption means)

30: press roller 31, 62: roller arm

40: rotating shaft 41: press member

43: cylinder 50, 51: nip member

60: tensioning assembly 61: pin

63: tension roller 64: spring

70: guide roller 80: reel

The present invention relates to a rotary die cutter for blanking a material having a predetermined shape from a liner such as a nonwoven fabric.

Generally, a 3.5-inch floppy disk has a protective tube 2 attached to the inner surface of the hard case to protect the storage medium 3 mounted in the case 1 from damage, as shown in FIG. have.

Rotary die cutters are used to form such guard plates 2. Conventional rotary die cutters are of two types. One is a hard type consisting of a die cylinder, anvil cylinder, and a knife plate mounted on the outer surface of the die cylinder and having a blanking blade. The liner is inserted between the die cylinder and the anvil cylinder and the blanking blade is in contact with the anvil cylinder to blank the material having the desired shape from the liner. Another type is known as a soft type in which an elastic member is wound around an anvil cylinder and a blanking blade is pressed against the elastic member to blank the material from the liner sandwiched between the two cylinders.

If the liner used is in the form of a nonwoven fabric, a hard type rotary die cutter is usually used.

The protective tube 2 for the storage medium 3 is a layered nonwoven fabric made of flexible and fine fibers.

One problem with conventional rotary die cutters is that during blanking the cutter cannot cut this fiber cleanly and completely. Thus, the blanked material is not frequently separated from the liner when it is sent out.

It is an object of the present invention to provide a rotary die cutter capable of reliably blanking material from a liner such that the blanked material is completely separated from the liner.

According to the present invention, there is an anvil cylinder having a die cylinder and an adsorption means for adsorbing the blanked material on the outer periphery of the anvil cylinder, the die cylinder and the anvil cylinder being adapted to intermittently rotate in opposite directions to each other. A plurality of dies mounted on a knife plate for blanking a material having a predetermined shape by means of a die cylinder, an anvil cylinder, a knife plate mounted on the outer circumference of the die cylinder, and a liner inserted between the die cylinder and the anvil cylinder. A rotary die cutter comprising a blanking blade is provided, which is provided on one side of the anvil cylinder and the die cylinder to which the liner is discharged and blanked toward the outer circumferential surface of the anvil cylinder when both cylinders are not rotated. It is adapted to pivot towards the outer circumference of the anvil cylinder to pressurize the material. The press member and a tensioning assembly for tensioning the liner after pressing the blanked material towards the anvil cylinder by the press member.

When the material is blanked by the rotation of the die cylinder and the anvil cylinder, the press member is pivoted toward the anvil cylinder, so that the blanked material is pressed against the anvil cylinder. At the same time, the tensioning assembly is operated to stretch the liner.

Although the liner and the blanked material are connected together through the fiber, the fiber is cut when the liner is moved away from the blanked material. Thus, the blanked material can be completely separated from the liner.

In the rotary die cutter according to the present invention as described above, the blanked material adsorbed on the outer circumference of the anvil cylinder is pressed toward the anvil cylinder by a press bar, while the material is continuously pressed toward the cylinder. The liner is taut. By tightening the liner, the blanked material and the liner are completely separated from each other as the liner moves away from the blanked material.

Other features and objects of the present invention will become apparent from the following description of the accompanying drawings.

As shown in FIGS. 1 and 2, the blade 11 is mounted around the die cylinder 10.

The knife plate 11 has a plurality of blanking blades 12 spaced at equal intervals on the circumference. Inside each blade 12 is provided an elastic member 13 for pushing the blanked material out.

The anvil cylinder 20 provided below the die cylinder 10 and the die cylinder 10 is intermittently rotated in the direction of the arrow of FIG. 1 at all intermittent rotation angles corresponding to the distance between the blades 12.

The anvil cylinder 20 has a plurality of suction ports 21 positioned to coincide with corresponding blades 12. The attraction force is applied to this adsorption port 21 when the adsorption port is within the angle range of α shown in FIG.

The nonwoven fabric liner A is in contact with the outer circumferential surface of the anvil cylinder 20 at the upper portion of the anvil cylinder and is inserted between the anvil cylinder 20 and the die cylinder 10.

The press roller 30 is provided in one of cylinders 10 and 20 into which a liner is inserted (FIG. 1).

The press roller 30 is rotatably mounted in the shape of the roller arm 31 which is pivotally supported on the pin 32. The press roller 30 is pivotable in the perspective direction to the anvil cylinder 20 by moving the cylinder 33 connected with the roller arm 31.

The press roller pivots toward the anvil cylinder 20 to prevent lateral displacement of the liner A and is used to sandwich the liner A between the roller and the anvil cylinder 20. On the dispensing side of the die cylinder 10 and the anvil cylinder 20 is provided with a rotating shaft 40 which is located on the transport path of the liner A and extends in the transverse direction with respect to the moving direction of the liner A.

The rotating shaft 40 has both ends rotatably supported (FIG. 3), and a pressing member 41 is provided at the center of the rotating shaft to press the blanked material against the outer circumference of the anvil cylinder 20. have. In addition, as shown in FIG. 3, the rotating shaft 40 has a lever 42 fastened to one end. The cylinder 43 is connected to the lever 42 and the rotation shaft 40 in the direction in which the press member 41 pivots toward the outer circumference of the anvil cylinder 20 when the die cylinder 10 and the anvil cylinder 20 are stopped rotating. It is adapted to operate to rotate it.

On the downstream side of the press member 41, a pair of nip members 50 and 51 for fitting the liner A on both sides thereof is provided as shown in FIG. Furthermore, on the downstream side of the nip member, a tensioning assembly for tensioning the liner A is provided.

The lower member 51 of the pair of nip members 50 and 51 has an upper half of the cylindrical outer nip member circumferential surface as shown by 52.

The upper nip member 50 is a roller adapted to be pressed against the lower nip member 51 by a conveying device (not shown) and to be spaced apart from the lower nip member 51.

The tensioning assembly 60 is rotatable on the free end of the pin 61, the roller arm 62 pivotally mounted on the pin 61, and the roller arm 62 for guiding the movement of the liner A. The tension roller 63, which is mounted securely, is composed of a spring 64 connected to the roller arm 62 to press the tension roller 63 in the tensioning direction of the liner A.

The liner A running around the tension roller 63 is guided by the guide roller 70 and wound up by a reel 80.

The hoist-movement by the reel 80 is selectively operated and stopped in accordance with the pivot range of the roller arm 62 so that the tension of the liner A is maintained at a predetermined constant value.

The operation of the rotary die cutter will be described. With the liner A inserted between the die cylinder 10 and the anvil cylinder 20, the die cutter is operated to intermittently rotate the die cylinder 10 and the anvil cylinder 20. Since the liner A is continuously attached to one of the suction means 21 located at the inlet side of the anvil cylinder 20, the liner can be conveyed in the same direction as the rotation direction of the anvil cylinder 20. Therefore, the material a having a predetermined shape is blanked or cut into shapes by the blanking blade 12 on the die cylinder 10. The blanked material a is continuously attached to the adsorption means 21.

When blanking the material a from the liner A, the liner a is sandwiched between the nip rollers 50 and 51 and the tension roller 63 is lowered as shown in FIG. 4A.

Thus, as the liner A is transported forward by the anvil cylinder 20, the liner will loosely hang between the anvil cylinder and the nip members 50, 51.

The die cylinder 10 and the anvil cylinder 20 are stopped when the material a is blanked by one of the blanking blades 12, and the cylinder 43 pivots the press member 41 toward the anvil cylinder 20. Works to make.

As shown in FIG. 4B, when the blanked material is pressed toward the anvil cylinder 20 by the press member 41, the press roller 30 causes the anvil cylinder 20 to pressurize the liner A. As shown in FIG. Start pivoting toward At about the same time, the upper nip member 50 starts moving while freeing the liner A. As shown in FIG.

As soon as the liner A is freed by the nip members 50 and 51, the tension roller 63 in the lower position is pulled up immediately after being pressed by the spring 64.

The liner A is thus tightly spread and separated from the blanked material a as shown in 4C.

The liner A spreads out tightly so that all the fibers connecting the material a and the liner A are cut when moved away from the blanked material a. The blanked material is thus completely separated from the liner A.

As the tension roller 63 is pulled up until the liner A is stretched out, the press bar 41 is pivoted upward while freeing the liner A. As shown in FIG. The press roller 30 is also moved away from the anvil cylinder 20, thus freeing the liner A.

The upper nip member 50 is also lowered to engage the liner A, while the reel 80 begins to rotate to wind up the liner A. The lifting motion of the reel will increase the tension of the liner A. Thus, the tension roller 63 is lowered while the spring 64 is stretched.

The blanked material (a) remains attached to the adsorption means (21) until it reaches the lowest point of the anvil cylinder (20) and is transported with the rotating anvil cylinder (20), at which point each The adsorption force applied to the adsorption means 21 is removed to cause the material a to escape.

Claims (1)

An anvil cylinder (20) having a dicylinder (10) and an adsorbing means (21) for adsorbing the blanked material on the outer periphery of the anvil cylinder (20), the dicylinder (10), and the dicylinder (10). ) And the anvil cylinder 20 is a die cylinder 10 and the anvil cylinder 20, the knife plate (11) mounted on the outer circumference of the die cylinder 10, which is adapted to intermittently rotate in a mutually opposite manner. And a plurality of blanking blades mounted on the knife plate 11 for blanking a material having a predetermined shape by a liner A inserted between the die cylinder 10 and the anvil cylinder 20. In the rotary die cutting machine composed of (12), The rotary die cutting machine is provided on one side of the die cylinder 10 and the anvil cylinder 20 through which the liner A is discharged, and blanks the material when both cylinders 10 and 20 do not rotate. A press member 41 adapted to pivot toward the outer circumference of the anvil cylinder 20 to press toward the outer circumferential surface of the anvil cylinder 20, and the press member 41 to press the anvil cylinder 20 And a tensioning assembly (60) for tensioning the liner (A) after pressing against the blanked material (a).