JP2007220236A - Molding device and molding method of tape reel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding device and a molding method of a tape reel where the molded tape reel is prevented from being deformed. <P>SOLUTION: After resin is cooled, in the case of pushing out the tape reel in a cavity formed in a molding mold with push-out pins and holding it by suction parts formed at a holding member, the tape reel is taken out while positions where the push-out pins abut on one surface of the tape reel and positions where the suction parts sucked the other surface of the tape reel taken out of the cavity are made to face each other at the tape reel. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tape reel molding method, and more particularly, to a tape reel molding apparatus and a molding method that are provided in a magnetic tape cartridge and can prevent damage to the edge of a magnetic tape.

  Conventionally, in a magnetic tape cartridge used as an external recording medium for data backup such as a computer, a single tape reel wound with a magnetic tape is placed in a substantially square flat cartridge case having a lower half and an upper half. It is housed in a rotatable manner. When using this magnetic tape cartridge, the tape pulling mechanism of the recording / reproducing device pulls out the magnetic tape from the cartridge case, and winds the drawn magnetic tape on the reel provided in the recording / reproducing device, thereby running the magnetic tape. (See Patent Document 1 below).

  The tape reel includes an upper flange having an opening at the center and a lower flange having a columnar reel hub fitted into the opening of the upper flange. The tape reel is manufactured by injecting molten resin into a cavity of a mold, and curing the resin by cooling and integrally molding the resin.

  4 (a) to 4 (c) are explanatory views showing a part of the process of forming the tape reel. As shown in FIG. 4, the molding die 121 for molding the tape reel 102 is formed with a cavity 122, and is provided with a protruding portion 123 for forming an opening when the reel of the upper flange is molded. The molding die 121 is formed with a plurality of ejection pins 124 that are molded after cooling and for taking out the tape reel. When the resin-molded tape reel 102 is taken out from the cavity 122 of the molding die 121 that defines the central opening, as shown in FIG. 4B, the protruding pin 124 is moved from the molding die 121 to the tape reel 102 side. Advance to. Then, the tape reel 102 is separated from the cavity 122 of the molding die 121 by pushing while pushing the tip end portion 124 a of the protruding pin 124 against the tape reel 102. As shown in FIG. 4C, the tape reel 102 is separated from the molding die 121, and the tape reel 102 is held by the holding member 125. The holding member 125 includes a plurality of support portions 126, and is configured to hold the tape reel 102 by adsorbing suction portions provided at the tip portions of the respective support portions 126 to the surface of the tape reel 102.

JP-A-7-161168

  FIG. 5 is a diagram showing a state in which a tape reel is viewed in a plan view in a conventional molding apparatus. When taking out the tape reel from the molding die, as shown in FIG. 5, a protruding pin 124 is disposed so as to protrude the circumferential portion of the tape reel 102. When the tape reel 102 is taken out of the molding die, the protruding pin presses the tape reel 102 in a state where the resin is not completely cooled, so the pressed portion of the tape reel 102 slightly protrudes on the opposite surface side. There is a concern that deformation will occur. When such deformation occurs on the traveling surface side of the magnetic tape of the tape reel 102, the deformed portion and the edge of the traveling magnetic tape come into contact with each other, resulting in damage to the magnetic tape, resulting in poor magnetic tape winding. There was room for improvement.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tape reel molding apparatus and a molding method capable of preventing deformation of a molded tape reel.

The above object of the present invention is a molding apparatus for resin molding a tape reel,
An ejector pin for taking out the tape reel in the cavity after cooling the resin, and a holding member for adsorbing and holding the tape reel taken out from the cavity by an adsorption portion, the ejector pin being the tape reel The tape reel forming apparatus is characterized in that a position where the suction portion abuts on one surface of the tape reel and a position where the suction portion attracts on the other surface of the tape reel face each other.

Further, the above object of the present invention is a molding method for resin molding a tape reel,
After the resin is cooled, when the tape reel in the cavity formed in the molding die is pushed out by the ejection pin and held by the suction portion provided on the holding member, the ejection pin is moved to one side of the tape reel. The tape reel is taken out in a state where the position where the tape reel comes into contact and the position where the other side of the tape reel taken out from the cavity is sucked by the suction portion face each other. This is achieved by a reel forming method.

  According to the present invention, when the tape reel formed from the molding die is taken out, the position of the protruding pin that comes into contact with the tape reel is in a state of being opposed to the suction position of the suction portion that sucks the tape reel taken out. . At this time, even if a load is applied to the tape reel from the protruding pin, a load is applied in the same manner from the suction portion that is in a relationship facing the protruding pin. Then, even after the cooling, even when the resin is not completely cured, it is possible to prevent the tape reel from being deformed by the pressing from the protruding pin. Thus, by preventing deformation of the tape reel, it is possible to prevent the edge of the magnetic tape from coming into contact with the tape reel and causing damage to the magnetic tape, thereby deteriorating the winding shape of the magnetic tape.

  It is preferable that the adsorption part is supported by a support part having high hardness. In this way, the suction portion that is directly opposed to the ejection pin is supported by the support portion having higher hardness, so that deformation due to a load from the ejection pin can be prevented more reliably.

  ADVANTAGE OF THE INVENTION According to this invention, the shaping | molding apparatus and shaping | molding method of a tape reel which can prevent that a deformation | transformation arises in the shape | molded tape reel can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view showing an embodiment of a magnetic tape cartridge provided with a tape reel according to the present invention. The tape reel according to the present invention is not limited to the one provided in the magnetic tape cartridge of FIG. 1, and can be applied to a tape reel generally manufactured by resin molding.

  The magnetic tape cartridge shown in FIG. 1 is a magnetic tape cartridge compliant with the so-called LTO standard, and includes a cartridge case 1 divided into a lower half 1A and an upper half 1B. Inside the cartridge case 1, a single reel 2 on which a magnetic tape MT is wound in advance, a lock plate 3 for locking the rotation of the reel 2, and an upper half are engaged, and the lock plate 3 is A compression coil spring 4 for urging the half 1A side and a release pad 5 for releasing the locked state of the reel 2 are provided.

  Further, inside the cartridge case 1, there are a slide door 6 that opens and closes the magnetic tape outlet 1C formed in the cartridge case 1 across the lower half 1A and the upper half 1B, and the slide door 6 is connected to the magnetic tape outlet 1C. A torsion coil spring 7 for biasing to the closed position is provided.

  Further, an erroneous erasure preventing claw 8, a cartridge memory chip 9 and the like are incorporated in the cartridge case 1.

  The reel 2 has a cup-shaped hub 2A that opens to the upper half 1B side, and a release pad 5, a lock plate 3, and a compression coil spring 4 are sequentially assembled in the cup-shaped hub 2A. A flange portion 2B is welded to the opening side of the cup-shaped hub 2A of the reel 2.

Next, a configuration of a molding apparatus for molding a tape reel and a procedure for molding the tape reel by the molding apparatus will be described.
FIGS. 2A to 2C are diagrams showing a procedure for forming a tape reel. As shown in FIG. 2A, the molding apparatus 20 has a molding die 21, and a cavity 22 that defines the shape of the tape reel 2 is formed in the molding die 21. The molding die 21 is provided with a protrusion 23 for forming the central opening of the tape reel 2 to be molded, and a plurality of ejecting pins 24 for taking out the molded tape reel 2 from the cavity 22. Yes. The molding die 21 is provided with a cooling water passage (not shown) for circulating cooling water when the molten resin is cooled. In the present embodiment, since the upper flange having an opening in the center is taken as an example as the tape reel 2, the protruding portion 23 is provided.

  The protruding pin 24 is a substantially columnar member, and has a configuration in which the distal end portion 24 a can be advanced and retracted with respect to the cavity 22 of the molding die 21. When the resin is injected into the cavity 22 and cooled, the tip portion 24 a of the protruding pin 24 is fixed at a position where it is retracted so as to be flush with the surface of the cavity 22. When the tape reel 2 is taken out, it is controlled so that the tip end portion 24a of the protruding pin 24 advances toward the cavity 22 side.

  When the resin is injected into the cavity 22, the molten resin is injected from the resin gate while the cavity 22 of the molding die 21 is sealed by fitting with a pair of molds (not shown). After injecting the resin, the resin is cured by cooling.

  As shown in FIG. 2A, when the tape reel 2 is taken out, the molding die 21 is opened, and one surface of the tape reel 2 held in the cavity 22 is exposed. Then, the ejection pin 24 is driven to advance, and the tip 24a is brought into contact with the other surface of the tape reel 2 and pushed out in the direction in which the ejection pin 24 advances.

  As shown in FIG. 2B, the tape reel 2 pushed out by the ejection pin 24 is separated from the cavity 22 of the molding die 21. At this time, the surface of the tape reel 2 opposite to the surface pressed by the protruding pin 24 is held by the holding member 25.

  The holding member 25 includes a plurality of substantially cylindrical support portions 26 each having a suction cup-like suction portion 27 formed at the tip thereof, and each suction portion 27 is held by being sucked onto one surface of the tape reel 2. is there. After adsorbing the tape reel 2 to the adsorbing portion 27, as shown in FIG. 2C, the tape reel 2 is held and conveyed to a position where the molded product is stocked.

FIG. 3 is a diagram of a state viewed from one of the surfaces in order to show the relationship between the position of the protruding pin with respect to the tape reel and the position of the suction portion.
When the forming device 20 pushes out the tape reel 2 with the ejection pin 24, the tape reel 2 is simultaneously sucked by the suction portion 27. As shown in FIGS. 2B and 4, the position where the protruding pin 24 abuts on the surface of the tape reel 2 and the position where the adsorbing portion 27 adsorbs on the opposite surface of the tape reel are the tape. The reel 2 is configured to face each other. In the present embodiment, the number of the protrusion pins 24 and the suction portions 27 is four, but the number is not particularly limited as long as they are the same directly facing each other.

  According to the molding apparatus and the molding method of the present invention, when the tape reel 2 molded from the molding die 21 is taken out, the position of the protruding pin 24 that comes into contact with the tape reel 2 attracts the tape reel 2 taken out. It will be in the state which faced the position which the part 27 adsorb | sucks. At this time, as shown in FIG. 2 (b), even if a load is applied to the tape reel 2 from the protruding pin 24, the load is similarly applied from the suction portion 27 that is in a direct relationship to the protruding pin 24. Then, even if the resin is not completely cured after cooling, it is possible to prevent the tape reel 2 from being deformed due to the pressing from the protruding pin 24. Thus, by preventing the tape reel 2 from being deformed, it is possible to prevent the edge of the magnetic tape from coming into contact with the tape reel 2 to cause damage to the magnetic tape and the deterioration of the winding shape of the magnetic tape. .

  It is preferable that the adsorption part 27 is supported by the support part 26 with high hardness. In this way, the suction portion that is directly facing the ejection pin 24 is supported by the support portion having higher hardness, so that deformation due to the load from the ejection pin 24 can be prevented more reliably. The diameter of the support portion 26 is preferably larger than the diameter of the tip portion 24 a of the protruding pin 24.

It is a disassembled perspective view which shows one Embodiment of a magnetic tape cartridge provided with the tape reel concerning this invention. It is a figure which shows the procedure of shaping | molding a tape reel. It is a figure which shows the relationship between the position of the protrusion pin with respect to a tape reel, and the position of an adsorption | suction part. It is explanatory drawing which shows a part of process of shape | molding a tape reel. It is a figure which shows the state which planarly viewed the tape reel.

Explanation of symbols

2 Tape reel 20 Molding device 21 Molding die 22 Cavity 24 Extrusion pin 26 Support part 27 Adsorption part

Claims (3)

A molding device for resin molding a tape reel,
After cooling the resin, provided with a protruding pin for taking out the tape reel in the cavity, and a holding member for adsorbing and holding the tape reel taken out from the cavity to the suction portion,
A tape reel forming apparatus, wherein a position where the protruding pin abuts on one surface of the tape reel and a position where the suction portion sucks on the other surface of the tape reel face each other on the tape reel. .   The tape reel forming apparatus according to claim 1, wherein the suction portion is supported by a support portion having high hardness. A molding method for resin molding a tape reel,
After the resin is cooled, when the tape reel in the cavity formed in the molding die is pushed out by the ejection pin and held by the suction portion provided on the holding member, the ejection pin is moved to one side of the tape reel. The tape reel is taken out in a state where the position where the tape reel comes into contact and the position where the other side of the tape reel taken out from the cavity is sucked by the suction portion face each other. Reel molding method.

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