JPH11207811A - Apparatus for forming carrier tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a carrier tape having an accurately shaped holding recessed part by a method wherein after pressure jetting a hot air toward the holding recessed part of a film during forming on a forming drum wherein the holding recessed part is vacuum formed by heating directly the film with a heating roll, the formed film is cooled. SOLUTION: A heating roll 110, a hot air jetting mechanism 120, a correcting roller 130, a film cooling mechanism 140, and a separation roller 150 are equipped around a forming drum 101, and a heating roll 110 preliminarily heats a film F. Then, a cavity becoming a mold of a holding recessed part of a carrier tape is formed on an outer periphery of the forming drum 101, and the film started to be softened is bonded inside the cavity by vacuum suction. Further, the hot air jetting mechanism 120 is equipped with an electric heater, heats pressure air, and jets it to the holding recessed part of the film F on the forming drum 101 to form in an accurate shape. Then the film is pushed on a swell correcting roller 120, and cooled with a film cooling mechanism 140.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier tape forming apparatus for accommodating small electronic components one by one in a receiving recess and conveying the same, and more particularly to a carrier tape for forming a receiving recess of a carrier tape into a tape. The present invention relates to a molding device.

[0002]

2. Description of the Related Art Conventionally, there is a carrier tape that transports small electronic components one by one in a receiving recess.
There are various methods for forming such a small accommodation recess P into the raw film F. One of them is a forming technique called "vacuum forming". FIG. 4 shows a conventional carrier tape forming apparatus using vacuum forming.
This will be described with reference to FIG. FIG. 4 shows a basic outline of vacuum forming in a carrier tape forming apparatus. In such a carrier tape forming apparatus, the film F on which the accommodation recess P is formed is formed.
Are pulled by the pulling roll R so as to move in contact with the outer circumferences below the preliminary heating roll Ha, above the main heating roll Hb, and below the forming drum M. The preheating roll Ha preheats the film F to about 160 ° C., and the main heating roll Hb main heats the preheated film F to about 180 ° C. Thus, the film F is sufficiently heated and softened so as to be easily vacuum-formed before coming into contact with the outer periphery of the forming drum M. The forming drum M is for vacuum-forming the accommodating recess P in the film F by bringing the film F still in a softened state into close contact with the cavity C formed on the outer periphery thereof by vacuum evacuation.

[0003]

However, the above-described carrier tape molding apparatus has the following problems. That is, the carrier tape in which the electronic components are accommodated is also used as an assembly pallet in an automatic assembly line while the electronic components are accommodated in the accommodation recesses P. In addition, it is necessary to keep the electronic component housing state constant in any of the housing recesses P to secure the accuracy of the position of the electronic component (on the assembly pallet).

However, since the inner radius of the arc around the bottom surface of the receiving recess cannot be reduced in the receiving recess P of the vacuum-formed carrier tape by the forming drum M of the above-described carrier tape forming apparatus, each receiving recess is formed. It is difficult to maintain the accuracy of the storage position of the electronic component stored in the electronic device. Therefore, in a concave portion of such a size, an inner radius of an arc around the bottom surface of the concave portion of the concave portion is as small as possible, and a uniform one is desired. However, such a conventional carrier tape molding apparatus can perform such vacuum forming. It was difficult. Also,
It is necessary to apply sufficient heat to the film in advance to prevent it from cooling and hardening before the molding is completed, so the film is heated and the transition from the softened state to the hardened state is delayed. This causes problems such as distortion of the film, limitation of the molding speed, and traces of the surface by the heating roll remaining on the film surface. The problem to be solved by the present invention is to provide a carrier tape forming apparatus for forming a carrier tape having an accurate recess shape at high speed.

[0005]

According to one aspect of the present invention, there is provided an apparatus for forming a carrier tape, comprising: a heating roll for directly heating a film; a forming drum for vacuum forming a storage recess; and a film being formed on the forming drum. And a film cooling mechanism for cooling the formed film. According to a second aspect of the present invention, in a carrier tape forming apparatus, a heating roll for preheating a film, a forming drum for vacuum forming a storage recess, and a hot-air injection mechanism for blowing hot air toward the storage recess on the forming drum are provided. And a correcting roller for correcting the undulation of the formed film, and a film cooling mechanism for cooling the film.

[0006]

According to the carrier tape molding apparatus of the present invention,
When the raw film is guided by the heating roll and goes around,
It is directly heated, sucked into the cavity by the forming drum, and vacuum forming of the accommodation recess is started. In the latter half of the vacuum forming, high-pressure, high-temperature air is jetted toward a circular arc around the bottom surface of the housing recess to assist the forming. Thereafter, the completed film is taken out of the molding apparatus via a roller for correcting the undulation of the formed film and a film cooling mechanism.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a carrier tape forming apparatus 100 includes a heating roll 110, a hot air jet mechanism 120, a correction roller 130, a film cooling mechanism 140, and a separation roller 150 around a forming drum 101. Forming drum 101 and heating roll 1
10, but not in contact with each other. The film F moves on a common tangent line between the heating roll 110 and the forming drum 101. Similarly, the hot air injection mechanism 120, the film cooling mechanism 140, and the separation roller 150 are close to the forming drum 101 but are not in contact with each other. Note that only the correction roller 130 is elastically in contact with the forming drum 101 via the film F. In addition,
A guide roller 111 for the heating roll 110 is arranged close to the heating roll. The heating roll 110 preliminarily heats the film F to about 150 ° C.
Before coming into contact with the outer periphery of the forming drum 101, the film F is heated to start softening so as to be easily vacuum formed. In addition, since the outer peripheral surface of the heating roll 110 is coated with a tetrafluoroethylene resin in order to improve the film releasability, the upper limit of the heating temperature of the heating roll is limited to 180 ° C. or less due to the heat resistance of the resin.

As shown in FIG. 2, a large number of cavities C are formed on the outer periphery of the forming drum 101 at equal intervals. The vacuum chamber 1 is provided in the cavity C through a minute gap 102 provided along the bottom side edge of the accommodation recess P.
03 is connected. The accommodating recess P is vacuum formed in the cavity C by bringing the softened film into close contact with the cavity C by evacuation. A vacuum exhaust device (not shown) is connected to the vacuum chamber 103. The holding temperature of the forming drum 101 is set to about 60 ° C. FIG.
, The hot air injection mechanism 120 has an electric heater (not shown) in its main body, heats the supplied compressed air to about 470 ° C.
The spray is directed toward the upper film F, particularly the bottom of the accommodating recess P being formed. The heat and dynamic pressure of the injected air assist the vacuum forming of the bottom part in the latter half of the formation of the accommodation concave portion P, so that the shape is accurately formed in a short time. The formed film is pressed by the undulation correcting roller 130 to correct the undulation. Film cooling mechanism 140
Sprays compressed air at room temperature toward the film to cool the film. The separating roller 150 is formed by the formed film F.
From the forming drum 101.

In the carrier tape forming apparatus according to the present invention, the raw film F before forming is directly preheated when orbiting along the heating roll 110, is sucked into the cavity C by the forming drum 101, and is vacuum formed. . At the time of this vacuum forming, high-pressure air is injected from the nozzle 121 of the hot-air injection mechanism 120 toward the bottom of the accommodation recess P being formed on the forming drum 101. The injection pressure assists the vacuum forming of the bottom part in the latter half of the formation of the accommodation recess P, thereby completing the correct shape.

In the case of a polycarbonate film which is a high-temperature plastic film having a softening temperature of about 300 ° C.,
The film is directly heated to about 180 ° C. by a heating roll, and the pressurized air is heated within a range of about 450 ° C. or more and 550 ° C. or less, and is jetted from a nozzle toward the film F on the forming drum 101 to achieve high speed and accurate. It can be formed into a shape.

[0011]

According to the carrier tape forming apparatus of the present invention, high-pressure, high-temperature air is injected toward the bottom surface of the housing recess without excessively heating the film to assist in forming, so that injection is performed from the nozzle. Due to the heat and dynamic pressure of the air thus produced, it is possible to form a carrier tape having the correct shape of the accommodation recess, particularly the correct shape of the bottom corner. Furthermore, the film forming speed is increased, and no trace of heating remains on the film. In addition, a high-temperature plastic film such as a polycarbonate film can be formed.

[Brief description of the drawings]

FIG. 1 is a front view of a carrier tape forming apparatus of the present invention.

FIG. 2 is a partial sectional view of a forming drum of the carrier tape forming apparatus of the present invention.

FIG. 3 is a cross-sectional view of a hot air injection mechanism of the carrier tape forming apparatus of the present invention.

FIG. 4 is a schematic front view of a conventional carrier tape forming apparatus.

[Explanation of symbols]

 Reference Signs List 101 forming drum 110 heating roll 120 hot air injection mechanism 130 roller for correcting undulation

Claims (2)

[Claims] 1. A heating roll for directly heating a film, a forming drum for vacuum-forming a housing recess, a hot-air injection mechanism for pressure-injecting hot air toward the housing recess being formed on the forming drum, and a hot-air injection mechanism. An apparatus for forming a carrier tape, comprising: a film cooling mechanism for cooling a film. 2. A heating roll for preheating the film, a forming drum for vacuum forming the housing recess, a hot air jet mechanism for blowing hot air toward the housing recess being formed on the forming drum, and a formed film. A carrier tape forming apparatus, comprising: a correcting roller for correcting undulation; and a film cooling mechanism for cooling a formed film.