TW201900383A - Method for molding carrier tape - Google Patents

Abstract

The present invention is a method for molding a carrier tape (10) having one or more rows of perforations and accommodating recesses (3) that accommodate components. The method includes a conveying step for conveying a sheet material (10A) to a drum-type mold (120), and a molding step for drawing in the sheet material (10A) that has been conveyed to the surface of the drum-type mold (120) and performing vacuum molding. In the molding step, the sheet material (10A) is vacuum-molded while being heated by the blowing of hot air from a hot-air-heating means (160), and the blowing flow rate of the hot air is at least 0.125 mL/mm2 and no more than 3.75 mL/mm2 per unit area. The present invention makes it possible to provide a method for molding a carrier tape in which the rectangularity of an opening edge of an accommodating recess is ensured.

Description

Carrier tape forming method

The present invention relates to a method of forming a carrier tape having a housing recess for receiving a component.

In the prior art, the carrier tape having the housing recessed portion for accommodating the component is formed by, for example, heating and softening the sheet as the base material tape by the heating roller, and then continuously supplying the sheet to the drum mold to vacuum-form the housing recess. (Refer to Patent Document 1).

Further, there is also known a method of forming a carrier tape by directly heating a sheet by a heating roller, and then ejecting hot air of 450° C. or more and 550° C. or less to the storage recessed pressure in the forming mold on the drum mold. Vacuum forming of the recess (refer to Patent Document 2). [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. Hei No. Hei No. Hei.

[The problem that the invention wants to solve]

However, as shown in Document 2, even if the heating temperature of the hot air is adjusted, the opening edge of the housing recess will have a shape with a large curvature (see Fig. 6), and the rectangular shape cannot be obtained, so that the forming precision of the housing recess cannot be stabilized. .

Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide a method of forming a rectangular carrier tape that secures an opening edge of a housing recess. [Technical means to solve the problem]

(1) One aspect of the present invention is a method of forming a carrier tape having a housing recess of one or more rows of storage parts, and the method of forming the carrier tape includes: a conveying step of conveying a sheet to a drum mold; and a forming step of sucking the sheet conveyed to the surface of the drum mold and vacuum forming the sheet; and in the forming step, blowing the hot air from the hot air heating mechanism to heat the sheet. The vacuum flow rate was set to 0.125 mL/mm ² or more and 3.75 mL/mm ² or less per unit area. (2) In the molding method of the carrier tape according to (1) above, the hot air blowing temperature may be 300 ° C or more and 700 ° C or less. (3) In the molding method of the carrier tape according to (1) or (2) above, the blowing flow rate of the hot air may be set to be 10 L/min or more and 60 L/min or less per line width. (4) The method of forming a carrier tape according to any one of the above (1) to (3), wherein the sheet conveying speed is 2 m/min or more and 10 m/min or less. (5) The method of forming a carrier tape according to any one of the above (1) to (4), wherein the drum mold is maintained at a temperature of 20 ° C or more and 100 ° C or less. [Effects of the Invention]

According to the present invention, it is possible to provide a method of forming a rectangular carrier tape which ensures the opening edge of the housing recess.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments of the present specification, the same members are denoted by the same reference numerals throughout the drawings.

First, the carrier tape 1 will be described before explaining the molding method of the carrier tape 1 according to the embodiment of the present invention. 1 is a perspective view of a carrier tape 1, and FIG. 2 is a plan view showing a plurality of rows of carrier tapes 10. The carrier tape 1 shown in FIG. 1 is a device in which a plurality of components P are housed, stored, or transported, or the component P is smoothly supplied to a mounting device of the substrate mounting component P. Examples of the component P include electronic components and precision components.

In the carrier tape 1, a plurality of feed holes 2 and a housing recess 3 for accommodating the component P are formed at specific intervals along the transport direction MD (longitudinal direction) of the tape. Further, in the present embodiment, the feed hole 2 has a circular shape in plan view, but the size, shape, and interval of the feed hole 2 are preferably provided so as to be continuous with the feed mechanism such as a mounting machine. Further, the feed hole 2 may be provided on both sides of the housing recess 3 along both sides in the longitudinal direction MD of the belt.

The housing recess 3 is formed in accordance with the size and shape of the component P to be housed. In the present embodiment, the housing recess 3 is formed in a substantially rectangular shape in plan view. Further, the housing recess 3 may be formed in the bottom surface to form a bottom hole 4 for inspection or the like, or to form a pedestal on the bottom surface. Further, the size of the housing recess 3 is usually in the range of 0.1 mm square to 16 mm square, and the bandwidth of the carrier tape 1 is in the range of 4 mm to 24 mm.

Further, the carrier tape 1 is formed of a thermoplastic resin. Examples of the thermoplastic resin include synthetic resins such as polycarbonate, polystyrene, polyvinyl chloride, amorphous polyethylene terephthalate, and polypropylene; and carbon is kneaded in the resins to impart conductivity. Into the person; the surface of the conductive coating is made.

However, the carrier tape 1 is formed by the forming device 100 of the carrier tape 10 described below, and is formed into a plurality of rows of carrier tapes 10, for example, four rows, eight rows, and the like, and thereafter, a cutting mechanism such as a slitting knife or the like is formed. It is manufactured by cutting and separating into a carrier tape 1 per row. Further, there are cases in which the positioning recesses used for forming the feed holes 2 and the like are provided between the rows or both end portions of the plurality of rows of the carrier tapes 10.

Next, the molding apparatus 100 and the molding method of the carrier tape 10 will be described. 3 is a schematic view showing a molding apparatus 100 for a carrier tape 10 used in a molding method of the carrier tape 10 according to the embodiment of the present invention, and FIG. 4 is a flow chart showing a molding method of the carrier tape 10 according to the embodiment of the present invention.

The molding apparatus 100 of the carrier tape 10 shown in FIG. 3 includes at least a preheating roller 110, a drum mold 120, an accumulation unit 130, a stamper 140, a conveying mechanism 150, and a hot air heating mechanism 160.

The preheating roll 110 conveys the sheet 10A supplied from the supply mechanism (not shown) to the drum mold 120 provided downstream of the conveyance direction MD, and heats and softens the sheet 10A, and the preheating roll 110 is configured to be capable of heating the sheet 10A at a temperature of about 100 °C. By preheating the sheet 10A by the preheating roller 110, the winding habit and undulation of the sheet 10A can be corrected to some extent.

The drum mold 120 has a plurality of cavities (not shown) corresponding to the size, shape, and spacing of the housing recesses 3 to be formed on the outer circumference, and is conveyed while being conveyed by the sheet 10A conveyed by the rotation. The material 10A vacuum forms the housing recess 3 . Further, each cavity is connected to a vacuum generator or the like. Further, the drum mold 120 is maintained at a constant temperature in a range of approximately 20 ° C to 100 ° C by, for example, a cold heat regulating medium such as water.

In the accumulating portion 130, the sheet 10A in which the housing recess 3 is formed is retained and once cooled, and thermal stress during vacuum forming is removed.

The stamper 140 is formed by punching the feed hole 2 into the sheet 10A, and the bottom hole 4 is also punched out on the bottom surface of the housing recess 3 as necessary.

The conveyance mechanism 150 intermittently conveys the sheet 10A from the accumulation unit 130 to the stamper 140.

The hot air heating mechanism 160 is for blowing hot air onto the sheet 10A and blowing it thereon, and has a plurality of hot air blowing ports (not shown). The hot air heating mechanism 160 is disposed such that the hot air blowing port is spaced apart from the sheet 10A by approximately 1 mm to 10 mm.

The hot air blowing outlet is provided in a width direction of the sheet 10A so as to correspond to a position at which each row of the housing recesses 3 is formed, and the opening shape may be a rectangular shape, a circular shape or an elliptical shape, and a specific flow rate may be blown. The hot air is uniformly blown at a position where each row of the housing recesses 3 is formed. Generally, the blowing flow rate of the hot air is in the range of 0.125 mL/mm ² or more and 3.75 mL/mm ² or less per unit area, or in the range of 10 L/min or more and 60 L/min or less per line width (8 mm).

Further, the blowing temperature of the hot air is in the vicinity of the hot air blowing port, and is usually in the range of approximately 300 ° C or more and 700 ° C or less, preferably 600 ° C or less. Further, the blowing temperature of the hot air may be set according to the melting point of the material of the sheet 10A.

Further, the molding apparatus 100 includes, in addition to the above-described various types of mechanisms, a cutting mechanism that cuts and separates the carrier tape 10 formed into a plurality of rows into one row of the carrier tapes 1, and a winding mechanism. The parts P are housed in the housing recess 3 of each carrier tape 1 and then taken up to the reel.

Next, a molding method of the carrier tape 10 will be described. The molding method includes at least a conveying step S1 for conveying the sheet 10A to the drum mold 120, and a forming step S2 for conveying to the drum mold 120. The sheet 10A on the surface is attracted and vacuum formed (see Fig. 4).

In the conveyance step S1, the sheet 10A is conveyed to the drum mold 120 at a fixed conveyance speed. At this time, the conveying speed is approximately 1 m/min to 15 m/min, preferably 2 m/min to 10 m/min. Further, in the step before the transporting step S1, the sheet 10A may be preheated by the preheating roller 110.

In the subsequent molding step S2, the sheet 10A is vacuum-adsorbed to the outer circumference of the drum mold 120, and the hot air is blown from the hot air heating mechanism 160 to heat the sheet 10A, and vacuum forming is performed. At this time, the drum mold 120 is configured to be capable of evacuating at least during the heating of the sheet 10A.

Thereafter, the carrier tape 10 in which the housing recess 3 is formed is cooled by the storage unit 130, and the feed hole 150 is inserted through the stamper 140 by intermittent transfer of the conveying mechanism 150. Then, the carrier tape 10 in which the feed hole 2 and the housing recess 3 are formed is cut and separated by a cutting mechanism. In this way, a single row of carrier tapes 1 is formed.

Here, the effects obtained by the molding method of the carrier tape 10 according to the embodiment of the present invention will be described in detail by way of the first embodiment and the second embodiment. Fig. 5 is a view showing a carrier tape 1 formed by a forming method of a carrier tape 1 according to an embodiment of the present invention, wherein (a) is a plan view, (b) is a cross-sectional view taken along line AA, (c) is a cross-sectional view taken along line BB, and Fig. 6 is a poor formability. The carrier tape 1A is a plan view, (a) is a plan view, (b) is a CC cross-sectional view, and (c) is a DD cross-sectional view. Further, the hatching in FIGS. 5 and 6 is added in order to easily confirm the difference in the area between the opening edges 310 and 310A.

(Example 1) In the present embodiment, a carrier tape 10 comprising four rows of carrier tapes 1 was formed from a sheet 10A made of polycarbonate (melting point of about 250 ° C), and the carrier tape 1 was 8 mm wide. Further, the housing recess 3 has a design size in which the opening edge 310 has a rectangular shape of 1.0 mm × 2.5 mm, a depth of 0.8 mm, and a distance of the transfer direction MD of 2 mm.

The molding conditions of the molding apparatus 100 are such that the temperature of the preheating roll 110 is set to 100 °C. Further, the hot air blowing port of the hot air heating mechanism 160 was set to be 1.5 mm apart from the sheet 10A, and the hot air temperature was set to 600 °C. The temperature of the drum mold 120 was set to 60 °C.

Further, the blowing flow rate of the hot air was changed from 5 L/min per line width (8 mm) to 65 L/min, and the conveying speed was changed from 1.0 m/min to 11 m/min.

The forming evaluation of the carrier tape 1 is performed by measuring the radius R (mm) in the storage recessed portion 3 by observing the opening edge 310 in the cross section cut in the center in the width direction in the transport direction MD by the microscope. The evaluation criteria are: when the radius R is 0.3 mm or less, it is considered to be good (○); when the radius R is larger than 0.3 mm, or when the carrier tape 1 is broken, it is regarded as defective (×). These results are shown in Table 1.

[Table 1]

As shown in Table 1, when the discharge flow rate exceeds 60 L/min, the sheet 10A is in a high temperature state, and there is a case where it is melted, and as a result, the sheet 10A is broken and cannot be continuously formed. Similarly, when the conveying speed is less than 2 m/min, the sheet 10A is broken and cannot be continuously formed.

Further, when the blowing flow rate is less than 10 L/min, since the sheet 10A is not sufficiently heated, it cannot extend in a manner following the cavity of the drum mold 120, so that the radius R of the opening edge 310A of the recess 3A is accommodated. It becomes larger (refer to Figure 6). Similarly, when the conveying speed exceeds 10 m/min, the sheet 10A cannot be extended in a chamfering manner, and the radius R of the opening edge 310A becomes large.

On the other hand, the flow rate is from 10 L/min to 60 L/min, and the conveying speed is in the range of 2 m/min or more and 10 m/min or less (if converted to unit area, it is 0.125 mL/mm ² or more). Further, 3.75 mL/mm ² or less), the radius R of the opening edge 310 did not become large (see FIG. 5), and a good evaluation (○) was obtained.

Therefore, as is clear from the above Table 1, if the blowing flow rate of the hot air heating mechanism 160 is less than 10 L/min or exceeds 60 L/min regardless of the conveying speed, a good evaluation (○) cannot be obtained. On the other hand, it is understood that a good evaluation (○) cannot be obtained if the conveying speed is less than 2 m/min or exceeds 10 m/min regardless of the blowing flow rate. Moreover, it is understood that when the conveying speed exceeds 6 m/min, a good evaluation (○) cannot be obtained at a low blowing flow rate.

Then, the conveying speed was set to 6.0 m/min, the blowing flow rate of the hot air was changed from 5 L/min to 65 L/min, and the temperature of the drum mold 120 was changed from 10 ° C to 110 ° C, and the radius of the opening edge 310 was measured. R (mm) was evaluated in the same manner as above. These results are shown in Table 2.

[Table 2]

As shown in Table 2, when the discharge flow rate exceeds 60 L/min, the sheet 10A is in a high temperature state, and there is a case where it is melted, and as a result, the sheet 10A is broken and cannot be continuously formed. When the blowing flow rate is less than 10 L/min, since the sheet 10A is not sufficiently heated, it cannot extend so as to follow the cavity of the drum mold 120, so that the radius R of the opening edge 310A of the housing recess 3A becomes large.

When the heating temperature of the drum mold 120 exceeds 100 ° C, the sheet 10A is in a high temperature state and is melted. When the drum mold 120 is released from the drum mold 120, the storage recess 3A is largely deformed and molded. Therefore, the winding is poor, and it cannot be continuously formed. Further, when the heating temperature of the drum mold 120 is less than 20 ° C, since the sheet 10A is not sufficiently heated, it cannot be extended to follow the cavity of the drum mold 120, so that the opening edge 310A of the recess 3A is accommodated. The radius R becomes larger.

On the other hand, at a flow rate of 10 L/min to 60 L/min (0.2 mL/mm ² or more and 1.25 mL/mm ² or less in terms of unit area), and the heating temperature of the drum mold 120 is In the range of 20 ° C or more and 100 ° C or less, the radius R of the opening edge 310 did not become large, and a good evaluation (○) was obtained.

Therefore, it can be seen from Table 2 that the blowing flow rate of the hot air heating mechanism 160 is less than 10 L/min (0.2 mL/mm ² per unit area) or more than 60, regardless of the temperature of the drum mold 120. L/min (if it is converted to 1.25 mL/mm ² per unit area), a good evaluation (○) cannot be obtained. On the other hand, when the temperature of the drum mold 120 is less than 20 ° C or exceeds 100 ° C regardless of the discharge flow rate, a good evaluation (○) cannot be obtained. Moreover, it is understood that when the temperature of the drum mold 120 is less than 60 ° C, a good evaluation (○) cannot be obtained at a low blowing flow rate.

(Example 2) In the present Example, the molding conditions other than the sheet 10A made of polystyrene (melting point of about 240 ° C) instead of the sheet 10A made of carbonate were the same as in Example 1. These results are shown in Tables 3 and 4.

[table 3]

As shown in Table 3, when the discharge flow rate exceeds 60 L/min, the sheet 10A is in a high temperature state, and there is a case where it is melted, and as a result, the sheet 10A is broken and cannot be continuously formed. Similarly, when the conveying speed is less than 2 m/min, the sheet 10A is broken and cannot be continuously formed.

Further, when the blowing flow rate is less than 10 L/min, since the sheet 10A is not sufficiently heated, it cannot extend in a manner following the cavity of the drum mold 120, so that the radius R of the opening edge 310A of the recess 3A is accommodated. Become bigger. Similarly, when the conveying speed exceeds 10 m/min, the sheet 10A cannot be extended in a chamfering manner, and the radius R of the opening edge 310A becomes large.

On the other hand, in the range where the blowing flow rate is from 10 L/min to 60 L/min and the conveying speed is 2 m/min or more and 10 m/min or less, the radius R of the opening edge 310 does not become large, and a good evaluation is obtained ( ○).

Therefore, as is clear from Table 3, if the blowing flow rate of the hot air heating mechanism 160 is less than 10 L/min or exceeds 60 L/min regardless of the conveying speed, a good evaluation (○) cannot be obtained. On the other hand, it is understood that a good evaluation (○) cannot be obtained if the conveying speed is less than 2 m/min or exceeds 10 m/min regardless of the blowing flow rate.

Further, from the comparison between Table 1 and Table 3, it is understood that the radius R of the opening edge 310 does not become large even in a region of low flow rate, high speed, or a region of low flow rate and temperature. Compared with the sheet 10A made of polycarbonate, the formability is good.

[Table 4]

As shown in Table 4, when the discharge flow rate exceeds 60 L/min, the sheet 10A is in a high temperature state, and there is a case where it is melted, and as a result, the sheet 10A is broken and cannot be continuously formed. When the blowing flow rate is less than 10 L/min, since the sheet 10A is not sufficiently heated, it cannot be extended in the manner of following the cavity of the drum mold 120, so that the radius R of the opening edge 310A of the housing recess 3A becomes large. .

When the heating temperature of the drum mold 120 exceeds 100 ° C, the sheet 10A is in a high temperature state and is melted. When the drum mold 120 is released from the drum mold 120, the storage recess 3A is largely deformed and molded. Therefore, the winding is poor, and it cannot be continuously formed. Further, when the heating temperature of the drum mold 120 is less than 20 ° C, since the sheet 10A is not sufficiently heated, it cannot be extended to follow the cavity of the drum mold 120, so that the opening edge 310A of the recess 3A is accommodated. The radius R becomes larger.

Further, in the case where the blowing flow rate is from 10 L/min to 60 L/min, and the heating temperature of the drum mold 120 is in the range of 20 ° C or more and 100 ° C or less, the radius R of the opening edge 310 does not become large, and more excellent is obtained. Evaluation (○).

Therefore, it can be seen from Table 4 that the blowing flow rate of the hot air heating mechanism 160 is less than 10 L/min (0.2 mL/mm ² per unit area) or more than 60, regardless of the temperature of the drum mold 120. L/min (if it is converted to 1.25 mL/mm ² per unit area), a good evaluation (○) cannot be obtained. On the other hand, when the temperature of the drum mold 120 is less than 20 ° C or exceeds 100 ° C regardless of the discharge flow rate, a good evaluation (○) cannot be obtained. Moreover, it is understood that when the temperature of the drum mold 120 is less than 60 ° C, a good evaluation (○) cannot be obtained at a low blowing flow rate.

Further, as can be seen from the comparison between Table 2 and Table 4, the radius R of the opening edge 310 does not become large even in a region of low flow rate, high speed, or a region of low flow rate and temperature. Compared with the sheet 10A made of polycarbonate, the formability is good.

According to the first embodiment and the second embodiment, it is preferable that the flow rate of the hot air blown from the hot air heating means 160 is 10 L/min or more and 60 L/min or less per line width (8 mm). In other words, it is preferable to set the blowing flow rate of the hot air to 0.125 mL/mm ² or more and 3.75 mL/mm ² or less per unit area.

Moreover, it is preferable to set the conveyance speed of the sheet 10A to 2 m/min or more and 10 m/min or less. Further, it is preferable to maintain the heating temperature of the drum mold 120 at a temperature of 20 ° C or more and 100 ° C or less.

As described above, the molding method of the carrier tape 10 of the embodiment is a method of molding the carrier tape 10 having the feed hole 2 of one row or more and the housing recess 3 of the storage part P, and the method of forming the carrier tape 10 includes: conveying Step S1, which conveys the sheet 10A to the drum mold 120; and a forming step S2, which sucks the sheet 10A conveyed to the surface of the drum mold 120 to vacuum-form it; in the forming step S2, While the hot air is blown from the hot air heating mechanism 160 to heat the sheet 10A, the hot air blowing flow rate is set to 0.125 mL/mm ² or more and 3.75 mL/mm ² or less per unit area. Thereby, by blowing the hot air to the sheet 10A (or the housing recess 3) formed by the drum mold 120, the sheet 10A can be heated and softened to accommodate the cavity, thereby ensuring the opening edge of the housing recess 3. 310 rectangular. In other words, the opening edge 310 of the housing recess 3 can be suppressed to a smaller radius R.

In the embodiment, the hot air blowing temperature is set to 300 ° C or more and 700 ° C or less. Thereby, by blowing the hot air to the sheet 10A (or the housing recess 3) formed by the drum mold 120, the sheet 10A can be heated and softened.

In the embodiment, the flow rate of the hot air is set to be 10 L/min or more and 60 L/min or less per line width. Thereby, the flow rate heating softening sheet 10A can be appropriately blown out.

In the embodiment, the conveying speed of the sheet 10A is set to 2 m/min or more and 10 m/min or less. Thereby, the flow rate (heating heat) can be appropriately blown to heat the softened sheet 10A.

In the embodiment, the drum mold 120 is maintained at a temperature of 20 ° C or more and 100 ° C or less. Thereby, the sheet 10A can be softened by heating with appropriate heat.

(Variation) In the above embodiment, the hot air blowing means of the hot air heating means 160 is provided in plural numbers corresponding to each row, but only one slit opening corresponding to a width of four rows may be provided.

In the above embodiment, the drum mold 120 is configured to be capable of being evacuated at least in the heating of the sheet 10A. However, it may be configured such that the vacuum is applied immediately before the heating or the heating is completed.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various changes and modifications can be made within the scope of the invention as described in the appended claims.

1‧‧‧ Carrying belt

1A‧‧‧ carrying belt

2‧‧‧ Feed hole

3‧‧‧ Storage recess

3A‧‧‧ Storage recess

4‧‧‧Check hole

10‧‧‧ Carrying belt

10A‧‧‧Sheet

100‧‧‧Forming device

110‧‧‧Preheating roller

120‧‧‧Roller mould

130‧‧‧Accumulation Department

140‧‧‧Molding

150‧‧‧Transportation agency

160‧‧‧hot air heating mechanism

310‧‧‧Open edge

310A‧‧‧ Opening edge

MD‧‧‧Transport direction (length direction)

P‧‧‧ parts

S1‧‧‧Transfer steps

S2‧‧‧ forming step

Figure 1 is a perspective view of a carrier tape. Figure 2 is a plan view showing a plurality of rows of carrier tapes. Fig. 3 is a schematic view showing a molding apparatus for a carrier tape used in a method of forming a carrier tape according to an embodiment of the present invention. Fig. 4 is a flow chart showing a method of forming a carrier tape according to an embodiment of the present invention. Fig. 5 is a view showing a carrier tape formed by a method for forming a carrier tape according to an embodiment of the present invention, wherein (a) is a plan view, (b) is a cross-sectional view taken along line A-A, and (c) is a cross-sectional view taken along line B-B. Fig. 6 is a view showing a carrier tape having poor formability, (a) is a plan view, (b) is a C-C cross-sectional view, and (c) is a D-D cross-sectional view.

Claims (7)

A method for forming a carrier tape, the carrier tape having a storage recess of one or more storage parts, the method of forming the carrier tape comprising: a transporting step of conveying a sheet to a drum mold; and a forming step, The sheet is conveyed to the surface of the drum mold and sucked and vacuum-molded; in the forming step, the sheet is heated by blowing hot air from the hot air heating mechanism, and the sheet is vacuum formed. The blowing flow rate of the hot air is set to be 0.125 mL/mm ² or more and 3.75 mL/mm ² or less per unit area. The method of forming a carrier tape according to claim 1, wherein the hot air blowing temperature is set to 300 ° C or more and 700 ° C or less. The method of forming a carrier tape according to claim 1, wherein the flow rate of the hot air is set to be 10 L/min or more and 60 L/min or less per line width. The method of forming a carrier tape according to claim 2, wherein the flow rate of the hot air is set to be 10 L/min or more and 60 L/min or less per line width. The method of forming a carrier tape according to any one of claims 1 to 4, wherein the sheet conveying speed is 2 m/min or more and 10 m/min or less. The method of forming a carrier tape according to any one of claims 1 to 4, wherein the drum mold is maintained at a temperature of 20 ° C or more and 100 ° C or less. The method of forming a carrier tape according to claim 5, wherein the drum mold is maintained at a temperature of 20 ° C or more and 100 ° C or less.