JPH024669A - Plastic carrier tape and its production - Google Patents

Abstract

PURPOSE:To prevent running off of guide holes out of a sprocket even when a carrier tape runs in a high-speed, by providing recesses containing electronic chip parts in a plastic tape and guide holes having enlarged holes. CONSTITUTION:Pierced holes 4 with a diameter (f) for example are bored at required positions for carrier tape guide holes 3 in a plastic tape 1. Enlarged holes 5 with a diameter (e) for example are made by an extruding process right on the pierced holes 4. Fine pierced holes 4 with small diameter as shown (g) are bored to be a regulated size (d) in the diameter for the corner tape guide holes 3 by the extruding process. The carrier tape guide holes 3 formed by such a way serve as positioner holes (pilot hole) for recesses 2 containing electronic chip parts in the next process. The size of the enlarged holes 5 is decided by the size of a driving gear. Next, the recesses 2 are bored by an extruding process to contain the electronic chip parts.

Description

[Detailed Description of the Invention] Industrial Application Field] The present invention is applicable to chip-shaped electronic components, such as resistors,
The present invention relates to a plastic carrier tape that is convenient for attaching capacitors, semiconductor elements, variable capacitors, volumes, etc. to electronic equipment using an automatic insertion machine, and a method for manufacturing the same.

Hereinafter, the term "chip-shaped electronic parts, etc." refers to the parts listed in -F.
Now that they are made into chips2, it takes a lot of time and advanced technology to manually attach these chipped electronic parts to electronic devices! There were 7 points.

However, as the development of automatic insertion machines progresses, the chip-shaped electronic components mounted on the carrier tape
Automatic insertion machines have made it possible to accurately attach electronic devices in a short amount of time without the need for human hands.

As shown in item 2, in order to attach chipped electronic components to electronic equipment using an automatic insertion machine, the accuracy of the automatic insertion machine and the carrier tape becomes a problem.

Therefore, the positions of the hollow holes in the carrier tape for storing chipped electronic components and the positions of the carrier tape feed holes are determined by EIAJ (Electronic Industries Association of Japan Standards).

As chip electronic components have become smaller, automatic insertion machines have also become smaller and faster.

FIG. 2 is an explanatory diagram of a conventional plastic carrier tape, FIG. 2 is a plastic tape, 2 is a recessed hole for accommodating a chipped electronic component, 3 is a feed hole in the carrier tape, and d is the diameter of the feed hole in the carrier tape. In the first step, the carrier tape feed hole 3 is drilled in the plastic tape 1 so that the carrier tape feed hole 3 has a specified diameter d.

In the second step, an extrusion process is performed using a die (not shown) to provide a recessed hole 2 (not shown) in a predetermined location for accommodating a chipped electronic component (not shown).

In order to prevent the plastic 1 from cracking, it is essential to perform hot working in the first and second steps.

A chipped electronic component is inserted into the recessed hole 2 of the carrier tape C made in this way, and a plastic film is pasted on top of it, and the mounting of the chipped electronic component is completed. Tape C is rolled and shipped.
Carrier tape C is inserted by an automatic insertion machine at the assembly factory.
Problems to be solved by the present invention, in which chipped electronic components are automatically taken out by a vacuum bottle set and attached to printed wiring boards of electronic devices] However, chipped electronic components are miniaturized. Over time, automatic insertion machines have also become smaller. That is, in an automatic insertion machine, the carrier tape passes through a small-diameter guiding or driving sprocket gear. At this time, if the carrier tape is thick and the diameter of the sprocket is the same as that of the feed hole of the carrier tape, the feed hole of the carrier tape may break when the sprocket rotates. Therefore, the feed holes for the carrier tape are usually made larger, but larger feed holes cause problems such as the carrier tape falling off the sprocket or problems in accurately feeding the carrier tape.

Thicker carrier tape, or plastic tape when compared to paper, has less flexibility, which can cause the carrier tape to be unable to bend along the gear and come off the gear sprocket. In addition, when the carrier tape passes through a vertical gear with a small diameter, the carrier tape acts like a spring, causing the chipped electronic components to bounce and cause the carrier tape and plastic film to bond. There was a problem in which accidents occurred where the material jumped out of the gap.

Furthermore, the processing of plastic tapes requires an extra step of applying heat to prevent them from cracking.

The present invention is intended to solve the above-mentioned problems, and even if the carrier tape moves at high speed along the sprocket of a single-section gear with a small diameter, the feed holes of the carrier tape will not fit in four or three directions. An object of the present invention is to provide a plastic carrier tape that does not come off and a method for manufacturing the same.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plastic carrier tape in which the carrier tape does not crack even when subjected to cold working, and a method for manufacturing the plastic carrier tape.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention comprises a recessed hole for accommodating an electronic component chipped into a plastic tape, and a feed hole having an enlarged hole. Characteristic 9 The present invention includes a first step of drilling a through hole in a plastic tape, a second step of extruding an enlarged hole larger than the feed hole of the carrier tape from directly above the through hole, and a second step of punching the enlarged hole. The third step is to make a feed hole of a specified size in the center of the carrier tape, and the fourth step is to make a recessed hole to accommodate the chipped electronic component.

FIG. 1 is an explanatory diagram of a method for manufacturing a perforation hole in a plastic carrier tape of the present invention, and FIG. FIG. 1(b) shows the second step, and FIG. 1(c) shows the third step.

In Figure 1, 1 is the plus tape, 2 is the recessed hole that accommodates the chipped electronic components, 3 is the feed hole of the carrier tape, and d is its diameter.

4 is a through hole, f is its first diameter, 5 is an enlarged hole, and e is its IK diameter.In the first step, the carrier tape feed hole 3 is placed in the plastic hole 11 at the position where it is to be provided. A through hole 4 having a diameter as shown in FIG. 1(a) is drilled.

In the second step, an extrusion process is performed to provide an enlarged hole 5 with a Yc diameter as shown in FIG. By extrusion processing, the diameter of the through hole 4, which has become narrower as shown in Figure 1 (B), as shown in g, is made into a carrier tape feed hole 3 with a specified diameter, as shown in Figure 1 (C), shown in Figure d. The feed holes 3 of the carrier tape that are drilled in this way serve as positioning holes (pilot holes) for making the recessed holes 2 that will accommodate the chip-shaped electronic components in the next process. The size of the enlarged hole 5 is determined by the size of the drive shafts (not shown).

In the fourth step, an extrusion process is performed to provide a recessed hole 2 for accommodating the chipped electronic component at a predetermined location (not shown).The thickness of the carrier tape C is usually 1 mm. However, some of them are thick, so I tried changing the thickness and the depth of the enlarged hole 5, and as a result, I found the first one.
As shown in FIG. 6 However, the depth of the enlarged hole 5 was 1 for the plastic tape 1.
/4 to 3/4 was also effective. Therefore, it is possible to make the diameter of the sprocket hole 3 of the carrier tape C almost the same as that of the sprocket.6 Furthermore, by cutting the corner of the cross section of the plastic tape 11. Since the inclined portion or radius is provided, the carrier tape C becomes flexible, and the carrier tape C can be further prevented from falling off from the sprocket.7 [Effects of the Invention] According to the present invention, the carrier tape Since the sprocket hole has an enlarged hole and a step is added between the sprocket hole and the sprocket hole, the carrier tape will not fall off the sprocket even when using a sprocket with a small diameter. According to the present invention, the corners of the cross section of the plastic tape are cut to make it flexible, so it is possible to feed the carrier tape accurately. According to the present invention, after drilling a through hole in the plastic tape, the extrusion process is performed from directly above the through hole. , the plastic tape does not crack even though it is cold processed7

[Brief explanation of the drawing]

FIG. 1 is an explanatory view of a method for manufacturing a feed hole in a plastic carrier tape of the present invention, and shows a cross-sectional view of a part of the feed hole in the carrier tape in an enlarged manner. Figure 1 (A) shows the first process, Figure 1 (B) shows the second process, Figure 1 (C) shows the third process, and Figure 2 is an explanatory diagram of the conventional plastic carrier tape. Figure 2 (A) is an external view of the carrier tape, and Figure 2 (B) is a sectional view taken along the line A-A in Figure 2 (A). −・−・Plastic tape 2・・・・・・
・・−<Recessed hole 3−−−−−−−Carrier tape feed hole 4−−−・・−
Through hole 5--enlarged hole 2 (Explanatory diagram of the manufacturing method of the feed hole in plastic carrier tape with a single recessed hole) Figure 1 (a) (b) Explanatory diagram of conventional plastic carrier tape 2nd factor

Claims (2)

[Claims] (1) A plastic carrier tape characterized by comprising: a recessed hole 2 for accommodating an electronic component chipped into a plastic tape 1; and a feed hole 3 having an enlarged hole 5. (2) a first step of drilling a through hole 4 in the plastic tape 1; a second step of extruding an enlarged hole 5 larger than the feed hole of the carrier tape C from directly above the through hole 4; Place carrier tape C of specified size in the center of
A method for manufacturing a plastic carrier tape, comprising: a third step of making a feed hole 3; and a fourth step of making a recessed hole 2 for accommodating a chipped electronic component.