JP2002086562A - Apparatus for producing carrier tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for producing a carrier tape by a vacuum forming method which can form without deforming a housing recessed part for housing a package such as an electronic part. SOLUTION: In the apparatus provided with a drum molding mold which has an approximately cylindrical flange part having an arc-shaped vacuum suction channel part at a prescribed position of an end surface and an approximately cylindrical mold part which is contacted/arranged freely rotatably with/on the end surface of the flange part, has lots of recessed parts on the surface, has suction holes for vacuum suction in the bottom surfaces of the respective recessed parts, and has communication passages ranging from the suction holes to the end surface which contacts the flange part, an arc-shaped gas supply channel part is formed at the prescribed position of the end surface of the flange part, a communication passage which makes the gas supply channel part communicate with the peripheral surface of the flange part is formed, gas is supplied to the suction holes of the recessed parts of the mold part which rotates with recessed parts formed in a sheet through gas supply channels, and the sheet is demolded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a carrier tape which is useful for storing and storing a large number of packages of various electronic parts and for transporting them, or for supplying the packages and the like to a mounting apparatus more smoothly. It is about.

[0002]

2. Description of the Related Art In general, a packaging material such as a paper tape, a magazine, a tray, or an embossed carrier tape is used for packaging electronic components such as a semiconductor package. In addition, embossed carrier tapes are mainly used because of easy handling. Conventionally, the carrier tape uses a sheet made of thermoplastic resin such as polystyrene, polyvinyl chloride, amorphous polyester, polycarbonate, etc., and press-molds the storage recess for storing the package, vacuum molding, air-pressure molding, and vacuum-pressure molding. Alternatively, molding is performed by compressed air plug assist molding or the like.

[0003] In such a carrier tape, after storing the package in the storage recess, a top tape is stuck to the storage recess opening side of the carrier tape, and the carrier tape is stored and transported. In the package mounting apparatus, the package is sucked out of the accommodating recess of the carrier tape from which the top tape has been peeled, taken out, and mounted.

[0004] Among the carrier tape forming methods, in a conventional carrier tape manufacturing apparatus of a vacuum forming method using a drum forming die having a suction hole for evacuation, as shown in FIG. A thermoplastic sheet (hereinafter referred to as a sheet 50) having a width is fed in a sheet advance direction 51 by a feed roll 52 and a feed touch roll 53, heated by a cylindrical preheating roll 54 and a heating roll 55, and further heated by a heating roll 55. After being softened by injection 56 of high-temperature air at a constant temperature to the boundary with the drum forming mold 70, the center angle of the drum forming mold 70 is in the range of an arc of about 210 ° while being pressed by the forming touch roll 57. The communication path for evacuation that has entered the evacuation groove 71 is evacuated, and formed on the surface of the drum mold 70 from the communication path. And said recess is covered with a sheet 50 through the suction hole communicating with the bottom surface of the recess by suction, Figure 8
As shown in the carrier tape 65 shown in FIG.
2 are formed on the sheet 50 in one row or multiple rows.

[0005] After being cooled to some extent by the cooling touch roll 58, the sheet 61 in which the accommodation recess 62 is formed is formed.
Is taken out by the take-up roll 59 and the take-up touch roll 60 and is released from the drum forming mold 70. And
Using a press punch, a feed hole 66 and a detection hole 67 are punched out of the sheet 61 in which the release concave portion 62 is formed. The carrier tape 65 is manufactured as described above.

However, in the carrier tape manufacturing apparatus according to the conventional vacuum forming method, for example,
When the inner capacity of the drum 2 is increased and the depth is deepened, after the storage recess 62 is formed in the sheet 50 in the drum molding die 70, the sheet 61 in which the storage recess 62 is formed is released from the drum molding die 70. At this time, the corner of the bottom surface of the storage recess 62 which has been cooled to some extent but is still slightly softened hits the side surface of the recess of the molding die and deforms, and the bottom shown in FIG. 8 becomes the deformed storage recess 68, or Due to the increase in the area of the bottom surface or side surface in accordance with the increase in the internal capacity of the storage recess 62, or due to other causes, the drum molding die 70
When the adhesiveness between the storage recess 62 and the bottom surface or the side surface of the storage recess 62 is good, the sheet 61 on which the storage recess 62 is formed is pulled to deform the storage recess 62 because it is difficult to release from the drum mold 70. May be.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a carrier tape formed by a vacuum forming method which can be formed without deforming a housing recess for housing a package such as an electronic component. It is to provide a manufacturing apparatus.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a drum forming mold for vacuum forming a recess for accommodating an electronic component or the like in a thermoplastic plastic sheet softened by heating. A flange portion having an arc-shaped vacuum drawing groove portion, and having a communication passage communicating with the groove portion and the outer peripheral surface, and rotatably disposed in close contact with an end surface of the flange portion,
A substantially cylindrical mold portion having a large number of concave portions on the surface, and having a suction hole for vacuum evacuation on the bottom surface of the concave portion, and having a communication passage from the suction hole to an end surface which is in close contact with the flange portion. A carrier tape manufacturing apparatus, comprising: forming a concave portion in the sheet by suctioning the concave portion on the surface of the mold by evacuating the sheet wound in the die portion through the flange portion to form a concave portion in the sheet. A mold portion that forms an arc-shaped gas supply groove at a predetermined position on an end face of the portion, and provides a communication passage communicating with the gas supply groove and the outer peripheral surface of the flange portion, and rotates in a state where a recess is formed in the sheet. The gas is supplied to the suction hole of the concave portion through the gas supply groove to release the sheet.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment of a drum forming die in a carrier tape manufacturing apparatus according to the present invention. 2A and 2B show a flange portion in FIG. 1, wherein FIG. 2A is a front view showing a part, and FIG. 2B is a side sectional view. 3A and 3B show a mold part in FIG. 1, wherein FIG. 3A is a front view and FIG. 3B is a side sectional view. FIG.
Represents a part of a component member having a concave portion in FIG. 3,
(A) is a plan view, and (b) is a perspective view near a concave portion. FIG. 5 is a diagram showing an embodiment of a carrier tape manufacturing apparatus according to the present invention. 6A and 6B show a carrier tape manufactured by the carrier tape manufacturing apparatus according to the embodiment of the present invention, wherein FIG. 6A is a plan view and FIG. 6B is a cross-sectional view taken along line AA.

As shown in FIG. 1, a drum forming die 1 according to an embodiment of the present invention has a substantially cylindrical flange portion 10 which is rotatably and closely mounted, and a die portion 20 having a large number of concave portions 22 on its surface. And are fitted on a common rotation shaft (not shown). The flange portion 10 is fixed to another structure so as not to rotate with respect to the rotation shaft, and the mold portion 20 is fixed to the rotation shaft and rotates together with the rotation shaft. The surfaces where the flange portion 10 and the mold portion 20 come into contact with each other are finished with high precision, and a lubricant or other material that is slippery and airtight can be supplied to the contact surface. However, sufficient airtightness can be ensured even when the rotating. In the drawing, reference numeral 2 denotes a pressing plate fixed to the rotary shaft, and reference numeral 21 denotes a gear meshing with a gear such as a heating roll.

As shown in FIG. 2, one end surface of the flange portion 10 is provided with a vacuum groove 13 for evacuating the communication passage 23 of the mold portion 20 shown in FIG. A gas supply groove 14 for supplying air is formed. The evacuation groove 13 is formed to have a length including the communication path 23 in which the center angle of one end surface of the mold part 20 shown in FIG.
Is formed to have a length including the communication path 23 whose central angle is within a range of an arc of about 15 °. The outer peripheral surface of the flange portion 10 has a vacuum groove 13 and a gas supply groove 14 respectively.
Are provided, and a vacuum port 15 and a gas supply port 16 are provided in each of the communication paths. Further, the flange portion 10 is provided with a grease groove 11 and a grease supply port 12 for supplying grease to a surface that comes into contact with the rotating shaft. The lengths of the vacuum groove 13 and the gas supply groove 14 may be appropriately determined.

The mold portion 20 shown in FIG. 3 may be a conventional mold portion. For example, the mold members 20a, 20b, 20c, 20
d, 20e, 20f, 20g, 20h, 20i, 20
j, 20k, 20l, 20m, 20n, 20o, 20
p, 20q, and 20r, the contact surfaces of the respective components are finished with high precision, and the components 20a, 20b, 20c, 20d, 20e, 20f,
20g, 20h, 20i, 20j, 20k, 201, 2
When the 0m, 20n, 20o, 20p, 20q, and 20r are combined and fixed with bolts or the like, sufficient airtightness is ensured at the contact surface of each component. A communication path 23 is formed in one end face of the mold part 20 in the axial direction, and a concave part is provided on the surface of the mold part 20 for storing electronic components and the like in a heated and softened plastic sheet. A large number of substantially rectangular parallelepiped concave portions 22 for forming the storage concave portions are formed. As shown in FIG. 3B or, for example, in a component member 20e shown in FIG. 4B, the bottom surface of each concave portion 22 is provided with a vacuum evacuation formed in the axial direction of the molding die 20. Hole 2 communicating with communication passage 23 for
4 are formed. The concave portion 22 covered with the plastic sheet is sucked from the suction hole 24 communicating with the communication passage 23 provided on the bottom surface of the concave portion, so that the concave portion is formed in the plastic sheet. The communication passage 23 is formed in two stages and communicates at its end. With such a configuration, the suction force from the suction hole 24 communicating with the communication passage 23 in each recess 22 does not largely depend on the distance from the vacuum suction port 16.

Next, the production of a carrier tape according to an embodiment of the carrier tape production apparatus according to the present invention will be described with reference to FIG. A thermoplastic resin sheet (hereinafter, referred to as a sheet 30) having a constant width is fed in a sheet advancing direction 31 by a feeding roll 32 and a feeding touch roll 33, and a cylindrical preheating roll 34 and a heating roll 3 are fed.
5, and is further heated and softened by injection of high-temperature air 36 at a constant temperature to the boundary between the heating roll 35 and the drum forming die 1, and then, while being pressed by the forming touch roll 37, the drum forming die 1 is pressed. The communication passage 23 of the mold part 20 which has entered the area of the vacuum groove 13 of the flange part 10
The concave portions 22 covered by the sheet 30 are sucked through the suction holes 24 communicating with the sheet 30, and the storage concave portions 42 are formed in the sheet 30 in one row or multiple rows.

After the sheet 41 having the recess 42 formed therein is cooled to some extent by the cooling touch roll 38, the sheet 41 enters the region of the gas supply groove 14 of the flange 20 in the mold 10 of the drum mold 1. Mold part 2
0 through the suction hole 24 communicating with the communication passage 23,
Air is supplied to the bottom of the concave portion 22 in which the sheet 41 in which the storage concave portion 42 is formed is used for the drum forming die 1.
After the mold 41 is forcibly released from the mold, the sheet 41 on which the storage recess 42 is formed is taken out by the take-up roll 39 and the take-up touch roll 40, and is completely released from the drum forming mold 1. Then, as shown in FIG.
The feed hole 46 and the detection hole 47 are punched out from the sheet 41 on which is formed by using a press punch die. The carrier tape 45 is manufactured as described above.

The apparatus for manufacturing a carrier tape according to the embodiment of the present invention described above is a conventional apparatus for manufacturing a carrier tape by a vacuum forming method. Replaced with mold 1
More simply, the flange portion of the conventional drum mold is replaced with the flange portion 1 shown in FIGS.
It is obtained by replacing the pressure with zero and supplying air or the like whose pressure has been adjusted from the gas supply port 16.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is an example of a prototype of a carrier tape having a width of 8 mm and a pitch of 4 mm in six rows by using the carrier tape manufacturing apparatus shown in FIGS.

A polystyrene sheet having a width of 60 mm and a thickness of 0.25 mm softened by a heating roll 35 or the like shown in FIG.
8 mm x 3.5 mm, depth 2.4 mm (deployment rate 400
%) Was continuously formed at a speed of 6 m / min. In the vacuum groove 13 formed in an arc shape in the range of 180 from 15 to 195 from the vertical direction of the flange 10 of the drum forming mold 1 shown in FIG. 2, the mold 20 shown in FIG. The inside of the communication passage 23 entering the area of the evacuation groove 13 was evacuated from the evacuation port 15 to a degree of vacuum of -0.1 MPa as a gauge pressure. Further, while the mold part 20 is rotating, 225 from the vertical direction of the flange part 10.
Air having a gauge pressure of 0.01 to 0.05 MPa is supplied from the gas supply port 16 to the communication passage 23 which enters the region of the gas supply groove portion 14 formed in an arc shape in the range of 15 to 240 °. Was supplied.

When air is not supplied in the gas supply groove 14, the pressure of the take-up touch roll 40 is 3
9N. For this reason, immediately after passing through the drum forming die 1, the sheet is still completely cooled, so that the sheet is stretched by the strong pressing pressure, causing a variation in the forming pitch in the storage recess. Further, the bottom of the storage recess was in contact with the mold at the time of mold release, causing damage.

On the other hand, in the case where the air having the above pressure is supplied in the gas supply groove portion 14 and the mold is released, the sheet formed with an extremely weak pressing pressure of about 4.9N of the pulling touch roll 40 may be picked up. did it.
Therefore, there is no variation in the molding pitch of the storage recess,
Further, in the conventional case, when the drum is peeled off from the drum mold 1, air is already supplied to the bottom of the concave portion 22 of the mold portion 20, and the storage concave portion has come off from the concave portion 22, so that the bottom of the storage concave portion is damaged. There was no, and the formed sheet could be taken off smoothly.

By using the above-described apparatus for manufacturing a carrier tape, a carrier tape can be manufactured without deforming the storage recess, which has been a problem in the past.

[0021]

According to the present invention, it is possible to obtain an apparatus for manufacturing a carrier tape by a vacuum forming method, which can be formed without deforming a housing recess for housing a package such as an electronic component.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a drum forming die in a carrier tape manufacturing apparatus according to the present invention.

FIGS. 2A and 2B show a flange portion in FIG. 1, wherein FIG. 2A is a front view showing a part, and FIG.

FIG. 3 shows a mold part in FIG. 1, (a) is a front view,
(B) is a side sectional view.

4 (a) is a plan view, and FIG. 4 (b) is a perspective view of the vicinity of the concave portion.

FIG. 5 is a view showing an embodiment of a carrier tape manufacturing apparatus according to the present invention.

6A and 6B show a carrier tape manufactured by the carrier tape manufacturing apparatus according to the embodiment of the present invention, wherein FIG. 6A is a plan view and FIG. 6B is a cross-sectional view taken along line AA.

FIG. 7 is a view showing an apparatus for manufacturing a carrier tape by a conventional vacuum forming method.

FIG. 8 shows defects of a carrier tape manufactured by a carrier tape manufacturing apparatus by a conventional vacuum forming method,
(A) is a top view, (b) is a BB line sectional view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Drum forming die 2 Pressing plate 10 Flange part 11 Grease groove 12 Grease supply port 13 Vacuum groove 14 Gas supply groove 15 Vacuum hole 16 Gas supply port 20 Mold part 20a, 20b, 20c, 20d, 20e, 20f, 2
0g, 20h, 20i, 20j, 20k, 201, 20
m, 20n, 20o, 20p, 20q, 20r Constituent members 21 Gear 22 Recess 23 Communication path 24 Suction hole 30 50 Sheet 31 51 Sheet advancing direction 32 52 Feeding roll 33 53 Feeding touch roll 34 54 Preheating roll 35 55 Heating roll 36 56 Injection of high-temperature air 37 57 Forming touch roll 38 58 Cooling touch roll 39 59 Take-off roll 40 60 Take-off touch roll 41 61 Sheet with storage recess formed 42 62 Storage recess 45 65 Carrier tape 46 66 Feed hole 47 67 Detection hole 68 Storage recess with deformed bottom 70 Drum forming die 71 Vacuum groove

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B65D 85/86 B29L 31:00 B29L 31:00 B65D 85/38 MF term (Reference) 3E096 BA08 CA13 CC02 4F202 AC03 AG05 AG07 AG28 AH81 CA17 CA19 CB02 CK11 CK90 CM04 CN01 CN05 CQ06 4F208 AC03 AG05 AG07 AG28 AH81 MA01 MB02 MC01 MD02 MG22 MH06 MJ09 MJ16 MK15 MK20 4F209 AC03 AG05 AG07 AG28 AH81 PA03 PH08 P09 PH02 P09

Claims (1)

[Claims] 1. A drum forming mold for vacuum forming a concave portion for housing electronic parts or the like in a thermoplastic plastic sheet softened by heating, has a substantially cylindrical shape having an arc-shaped vacuum drawing groove at a predetermined position on an end surface thereof. A flange portion provided with a communication passage communicating with the groove portion and the outer peripheral surface; a flange portion rotatably mounted on an end surface of the flange portion; a plurality of concave portions on the surface; A substantially cylindrical mold part having a communication passage from the suction hole to an end face which is in close contact with the flange part, and the sheet wound in the mold part is evacuated through the flange part. In a carrier tape manufacturing apparatus in which a concave portion is formed in a sheet by being drawn into a concave portion on a surface of a mold by pulling, an arc-shaped gas supply groove portion is formed at a predetermined position on an end surface of the flange portion. Also, a communication passage communicating with the gas supply groove and the outer peripheral surface of the flange portion is provided, and the gas is supplied to the suction hole of the concave portion of the mold portion that rotates with the concave portion formed in the sheet through the gas supply groove. An apparatus for manufacturing a carrier tape, characterized in that a sheet is released.