JP2007111833A - Slitter device and manufacturing method of package - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slitter device which reproduces cutting with a clearance while suppressing cost, and a manufacturing method of a package by using the device. <P>SOLUTION: In this slitter device to be used for manufacturing the package, a relief part 21 forming a prescribed clearance Z in a space with a cutting edge 14 at a sheet carrying-in side end part in a lap part with a cutting edge 14 of a lower blade 12 is provided at a cutting edge 13 of each upper blade 11. A radial width of the relief part 21 is set to be smaller than lap margins P of both the cutting edges 13 and 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a film carrier used for manufacturing an electronic component by slitting a long sheet or an original film, a tape material for fixing the electronic component using a surface adhesive layer, various electric and electronic components, and a mechanism. The present invention relates to a slitter device suitable for manufacturing various packaging bodies such as carrier tapes for storing and transporting parts and the like, and a packaging body manufacturing method using the same.

Conventionally, when slitting (cutting or shearing) a sheet-like workpiece having a predetermined shape into a multi-row product having a predetermined width when manufacturing the package, a slitter device having a plurality of rotary blades at the top and bottom Is used (see, for example, Patent Document 1).
JP-A-11-129196

  In the manufacture of the package as described above, transparent plastic materials, translucent plastic materials, conductive additives such as carbon, metal oxides or conductive polymers, and various antistatic agents are kneaded or applied to the surface of the sheet. Long materials such as plastic materials that are provided with conductivity and antistatic properties by coating conductive materials, composite sheets in which metal sheets and metal films are integrated into plastic sheets, and paper sheets (including synthetic paper) Original fabric (semi-processed sheet or film) was used. Such a sheet or film has a thickness of 0.1 to 0.6 mm, and a cross-sectional configuration of a single layer, a similar multilayer, a heterogeneous multilayer, or the like has been used.

  In manufacturing a package using such a semi-processed sheet or film (hereinafter referred to as a workpiece), when the workpiece is slit with the slitter device, whisker burr (fibrous burrs) is generated on the cut surface. It was. Since such burrs are rubbed and collected when passing through the guide rail of a taping machine, they may become a fluffy burr lump and interfere with taping work. It is. In particular, when the workpiece is a plastic sheet containing carbon, beard burrs are likely to occur on the cut surface.

  As a result of examination of this point by the present inventor, it was confirmed that when the plastic sheet is slit, the cut surface is not perpendicular to the sheet surface but is formed obliquely. In this case, if slitting is performed using the normal gobbel system, the upper and lower blades are almost at the same position in the axial direction, so the cracks that have progressed diagonally merged in the middle part of the cut surface, and the surplus part between them. It is inferred that it will be thinned and become shaved.

  In addition, the inventors of the present invention made the cutting method a gang method and slit the workpiece under the condition that a clearance was provided between the upper and lower blades. No occurrence of whirling was observed, and the shape and state of the cut surface were almost good. I was able to get a cut. This is presumably because, in the case of clearance-cutting, since the cracks progressing obliquely merge so that they hit each other at the middle part of the cut surface, there is almost no surplus part between them, and the occurrence of whirling is suppressed. As a result, it was confirmed that cutting with clearance is an effective method for countering the occurrence of whisker.

Here, as a cutting method of the slitter apparatus as described above, a gobel method, a gang method, and a spring gang method are known.
As shown in FIG. 6 (a), the Göbel method is arranged so that the upper blades 111 are pressed against each other from one axial side of the plurality of lower blades 112 (so that the clearance is 0), and each of these upper and lower In this method, the workpiece W is cut into multiple lines by the blades 111 and 112. As shown in FIG. 6 (b), the gang method is a method in which a plurality of upper and lower blades 211 and 212 are arranged alternately and so that both axial sides thereof are close to each other (with a clearance). In this method, the workpiece W is cut into multiple lines by the upper and lower blades 211 and 212. Moreover, as shown in FIG.6 (c), with a spring gang system, several upper-and-lower blades 311 and 312 are arrange | positioned alternately, and it arrange | positions so that these axial direction both sides may be pressed. This is a method of cutting the workpiece W into multiple lines by 312.

  The above-mentioned Gobel method is a cutting method in which the lower blade tip position becomes the reference of the cutting surface, and the upper and lower blades maintain a contact state to obtain stable cutting accuracy. Therefore, under the condition with clearance, the accuracy of the tip position of the upper blade is not stable due to the influence of vibration caused by the stress from the workpiece, and it is difficult to set a minute clearance between the upper and lower blades.

  On the other hand, the gang method is effective for performing clearance cutting, but the clearance between the upper and lower blades must be ensured with high accuracy, and the parts accuracy and rigidity of the upper and lower blades and their holders and spacers are high. In addition to being required, these high assembly precisions are required. For this reason, there exists a problem of increasing initial cost and an assembly man-hour. Moreover, in order to release the product that is sandwiched between the upper blades or the lower blades and is about to be caught, a discharging device such as a comb blade or a separator ring is required, which further increases the initial cost. is there. Moreover, when the unevenness | corrugation was formed in the surface of a workpiece | work, use was difficult.

In addition, if the clearance condition is reproduced in the spring gang method, problems similar to those of the gobel method are expected, and a product release device is required as in the gang method.
That is, even if the existing cutting method is used as it is, it is difficult to reproduce the clearance-cutting while suppressing the cost, and thus improvement of such a point is desired.
The present invention has been made in view of the above circumstances, and provides a slitter device that can reproduce clearance-cutting while reducing costs and a method of manufacturing a package using the slitter device.

  As a means for solving the above-mentioned problems, the invention described in claim 1 is arranged such that a pair of rotary blades having rotating shafts parallel to each other are arranged such that the outer peripheral cutting edges overlap in the axial direction and are adjacent in the axial direction. In the slitter device that cuts the sheet-like workpiece using these rotary blades to obtain a product having a predetermined width, the other blade is overlapped with the blade tip of one of the rotary blades at the workpiece carrying side end of the other blade tip. A relief portion that forms a predetermined clearance is provided between the blade edge of the rotary blade and the radial width of the relief portion is set to be smaller than the overlap margin between the blade edges.

  The invention described in claim 2 is characterized in that the rotary blades are pressed against each other in the axial direction.

  The invention described in claim 3 is characterized in that the workpiece is a plastic sheet and the product is a package for storing and / or conveying parts.

  The invention described in claim 4 is characterized in that the slitter device according to any one of claims 1 to 3 is used in the method for manufacturing a package.

According to the present invention, when cutting (shearing) of a workpiece is started at the workpiece carry-in side end portion (intersection portion of both blade tips on the workpiece carry-in side) of the overlapping portion of both blade tips in the axial view of both rotary blades. While a clearance is formed between the two cutting edges, both cutting edges can contact each other in the axial direction and press them against each other at an intermediate portion of the overlapping portion of both cutting edges.
This makes it possible to create a stable clearance state between the cutting edges at the cutting start point of the workpiece, and keeps the cutting surface in good condition when slitting the plastic sheet and cutting out the package. The generation of whiskers can be effectively suppressed.
In addition, it can be handled by replacing only the upper blade in the conventional slitting device of the cabel method, so that parts other than the upper blade can be diverted and a discharge device for product release can be dispensed with. Can be suppressed.

Hereinafter, examples of the present invention will be described with reference to the drawings, using a carrier tape as an example of a package.
As shown in FIG. 1, in the manufacturing process of a carrier tape, a long semi-processed sheet (work) 2 in which a large number of predetermined embossed portions 3 and sprocket holes 4 are formed is sequentially carried into a slitter device 10 and conveyed. By being slit into a plurality of rows along the direction H, it is carried out as a multiple carrier tape 5 having a predetermined width. A predetermined electronic component is accommodated in each embossed portion 3 and a cover tape is attached to each unloaded carrier tape 5 in a taping process (not shown).

  The semi-processed sheet 2 is a thermoplastic sheet imparted with conductivity by containing carbon. In order to divide the sheet into a plurality of rows along the conveying direction H, the embossed portion 3 and the sprocket holes are provided for each row. 4 is formed continuously.

  Referring to FIG. 2 as well, the slitter device 10 has a plurality of upper blades 11 and lower blades 12 arranged along the sheet width direction orthogonal to the sheet conveying direction H. Each of the upper blade 11 and the lower blade 12 is configured as a rotary blade that rotates around the rotation axes C1 and C2 along the sheet width direction, and is arranged coaxially with each other in the vertical direction. The rotation directions of the upper and lower blades 11 and 12 are indicated by arrows R1 and R2 in the figure. Further, the upper blades 11 and the lower blades 12 are disposed so that the outer peripheral cutting edges 13 and 14 overlap (wrap) in the axial direction and are adjacent in the axial direction. In the lap part (overlapping part) L of these upper and lower blades 11 and 12, the semi-processed sheet 2 is sheared.

  3 and 4, the slitter device 10 is arranged so that the upper blade 11 is pressed from one axial direction side of each lower blade 12 so that each of the upper and lower The semi-processed sheet 2 is cut into multiple strips by the blades 11 and 12 so as to be of a gobel type.

Each upper blade 11 has a disk shape with a thickness of about 1 mm, and has substantially the same thickness except for an escape portion 21 described later. The outer peripheral portion of each upper blade 11 is provided with a slight inclination so that the blade edge 13 side is located on the lower blade 12 side. A disc spring 11a is arranged on the surface of the upper blade 11 opposite to the lower blade 12, and the upper blade 11 is pressed against the lower blade 12 by the spring force of the disc spring 11a.
On the other hand, each of the lower blades 12 has a cylindrical shape along the axial direction, and the ridge line portion on the upper blade 11 side on the outer periphery thereof is a cutting edge 14 having a substantially right-angle cross section without a clearance angle.

  Here, in the ridge line portion on the lower blade 12 side of the cutting edge 13 on the outer periphery of each upper blade 11, an escape portion 21 formed by obliquely chamfering this is formed. In other words, the escape portion 21 is formed by notching the ridge portion in a straight line shape (which may be an arc shape or a step shape) when the cutting edge 13 is viewed in cross section. The width in the radial direction of the upper blade 11 in the escape portion 21 is set to be smaller than the lapping allowance (overlap allowance, the lapping width between the rotary shafts C1 and C2) P of the upper and lower blades 11 and 12. The clearance 21 forms an axial clearance Z between the blade edges 13 and 14 at both ends of the upper and lower blades 11 and 12 in the lap portion L in the sheet conveying direction (see FIG. 3). On the other hand, at the intermediate portion in the sheet conveying direction of the lap portion L, both the blade edges 13 and 14 are in contact in the axial direction (see FIG. 4).

As shown in FIG. 5 (a), when the half-processed sheet 2 is cut, the cut surface is not perpendicular to the sheet surface but obliquely. When slitting is performed using the blades 411 and 412, the obliquely proceeding cracks merge so as to pass each other at the intermediate portion of the cut surface, and the surplus portion Y between them is thinly shaved and becomes a base of shading.
On the other hand, as shown in FIG. 5 (b), when cutting is performed in a clearance state, cracks that have progressed diagonally merge so that they strike each other at the middle portion of the cut surface, so that there is almost no excess portion between them. And the occurrence of whiskers can be effectively suppressed.

  Next, the upper and lower blades 11 and 12 were combined, the same product was cut 200 m (about 30 minutes), and the amount of burr generated on both was confirmed. There was also no adhesion of whiskers to No. 12. Moreover, although the cut surface of the product was somewhat inferior in tactile sensation, it was at a level that was not a problem as a product, and normal burrs were not observed even when confirmed with a microscope, and it was confirmed that the cut surface had no problem.

  Furthermore, the pressing force against the lower blade 12 of the upper blade 11 at the time of cutting was 0, and in this state, it was confirmed that the cutting state was stable without being affected by the vibration of the upper blade 11. In addition, when the pressing force of the upper blade 11 is negative (when both blades are not in contact), the upper blade 11 may be shaken. However, if the accuracy of the blade angle is taken into consideration, the pressing pressure is increased. It is preferable that the two blades are pressed against each other. In this case, at least the same result as that obtained when the pressing pressure is 0 is obtained.

  When the lower blade 12 is a conventional blade having a clearance angle instead of a right-angle blade, only the upper blade 11 is replaced with an improved blade and cutting is performed in the same manner as described above. The amount was confirmed to decrease obviously. It was also confirmed that if the lower blade 12 is a right angle blade with no clearance angle, the amount of whiskers is reduced to the extent that it cannot be visually confirmed.

  When the pressing pressure of the upper blade 11 against the lower blade 12 is increased, the state of the cut surface is improved and the cut size is stabilized, but the occurrence of whiskers becomes remarkable. On the other hand, if the pressing pressure is reduced and a clearance is provided between the upper and lower blades 11 and 12, the occurrence of whisker burr can be suppressed, but the state of the cut surface deteriorates and the cut size becomes unstable. In consideration of such points, the present inventor conducted a cutting test and confirmed that it is preferable to provide a clearance of about 8 to 20% of the sheet thickness (workpiece thickness) between the upper and lower blades 11 and 12. It was done.

  As described above, the slitter device 10 in the above-described embodiment has a plurality of upper blades 11 and lower blades 12 having rotation axes C1 and C2 parallel to each other and arranged along each axial direction. The blade edges 13 and 14 are arranged so as to wrap in the axial direction and adjacent to each other in the axial direction, and further arranged so as to press the upper blade 11 from one side in the axial direction of each lower blade 12. The upper and lower blades 11 and 12 are used to cut a carbon-containing conductive plastic sheet into a plurality of strips to obtain a carrier tape 5 having a predetermined width. 14 is provided with an escape portion 21 that forms a predetermined clearance Z between the lower blade 12 and the cutting edge 14 at the sheet carry-in side end of the lap portion L, and the radial width of the escape portion 21 is set to the both cutting edges 13, 14 luck One in which was set to be smaller than the generation P.

According to this configuration, the semi-processed sheet at the sheet carry-in side end portion (intersection portion between the two blade edges 13 and 14 on the sheet carry-in side) of the lap portion L of the both blade edges 13 and 14 when the upper and lower blades 11 and 12 are viewed in the axial direction. When the cutting of 2 is started, a clearance Z is formed between the cutting edges 13 and 14, while the cutting edges 13 and 14 are in the axial direction in the intermediate portion of the lap portion L of the cutting edges 13 and 14. It is possible to touch and press them together.
As a result, a stable clearance state can be created between the cutting edges 13 and 14 at the cutting start point of the semi-processed sheet 2, and also when the carrier tape 5 is cut out by slitting the carbon-containing conductive plastic sheet. In addition, it is possible to effectively suppress the occurrence of whiskers while maintaining a good cut surface state.
In addition, it can be handled by replacing only the upper blade in the conventional slitting device of the cabel method, so that parts other than the upper blade can be diverted and a discharge device for product release can be dispensed with. Can be suppressed.
Further, it was confirmed that the sheet having the embossed portion was advantageous for cutting, and the product after cutting could be discharged without providing a special discharging device.

  The present invention is not limited to the above-described embodiments. For example, a relief portion may be provided on the lower blade instead of the upper blade, or the slitting device may be applied to a gang method or a spring gang method slitter device instead of the gobel method. Good. Further, it can be applied to a slitter device for products other than the carrier tape. And the structure in the said Example is an example of this invention, and it cannot be overemphasized that a various change is possible in the range which does not deviate from the summary of this invention.

It is a schematic diagram of the slit process of the carrier tape in the Example of this invention. It is a principal part enlarged view of the slitter apparatus in FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is explanatory drawing of the cut surface of a semi-processed sheet, (a) is a cut surface at the time of cut | disconnecting a semi-processed sheet using the conventional upper and lower blades, (b) is half process using the upper and lower blades of a present Example. The cut surface when the sheet is cut is shown. It is explanatory drawing of the existing cutting | disconnection system, (a) shows a gobel system, (b) shows a gang system, (c) shows a spring gang system.

Explanation of symbols

2 Semi-processed sheet (work, plastic sheet)
5 Carrier tape (product, packaging)
10 Slitter device 11 Upper blade (Rotating blade)
12 Lower blade (Rotating blade)
13, 14 Cutting edge 21 Relief part C1, C2 Rotating shaft P Lap allowance (overlap allowance)
Z clearance

Claims (4)

A pair of rotary blades having rotation axes parallel to each other are arranged so that the outer peripheral cutting edges overlap in the axial direction and are adjacent in the axial direction, and the sheet-like workpiece is cut using these rotary blades. In the slitter device to make a product of a predetermined width,
The cutting edge of one of the rotary blades is provided with a relief portion that forms a predetermined clearance with the cutting edge of the other rotary blade at the workpiece loading side end of the overlapping portion of the two blade edges, and the radial direction of the relief portion A slitter device characterized in that the width is set to be smaller than the overlap margin of both cutting edges. The slitter device according to claim 1, wherein the rotary blades are pressed against each other in the axial direction. The slitter device according to claim 1, wherein the workpiece is a plastic sheet, and the product is a package that stores and / or conveys parts. The manufacturing method of the package characterized by using the slitter apparatus in any one of Claims 1-3.

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