JP2010099866A - Method of molding integrated member and upper flange, mold for molding integrated member and upper flange, integrated member, upper flange, tape reel, and tape cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply improve the accuracy of the runout or warpage of an upper flange. <P>SOLUTION: A mold 9 for molding an integrated member is equipped with a fixed side mold 91, a movable side mold 92 which is disposed opposite to the fixed side mold 91 and has a molding hole 92a for molding at least an inner peripheral surface and an outer peripheral surface of a hub 31 to be formed, and twelve mold pieces 93 which are extended to the fixed side to the movable side 92 and to the opposite direction of the movable side molds 91, 92, are inserted from the surface of the opposite side to the fixed side mold 91 so as to be disposed on the same circumference mutually corresponding to the molding hole 92a, and have molding surfaces 93b which face the molding hole 92a to mold a part of the upper end surface of the hub 31. The mold for molding the integrated member for molding the integrated member 33 wherein the position related to the opposite direction of the fixed side and movable side molds 91, 92 of the molding surface 93b of the respective mold pieces 93 can be adjusted is provided and the integrated member 33 is molded by the mold 9 for molding the integrated member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an integrated member molding method, an upper flange molding method, an integrated member molding die used in the integrated member molding method, an upper flange molding die used in the upper flange molding method, An integrated member formed by the forming method of the integrated member, an upper flange formed by the forming method of the upper flange, a tape reel provided with the integrated member or the upper flange, and a tape cartridge provided with the tape reel It is about.

Conventionally, for example, a tape cartridge such as a magnetic tape cartridge used as a storage device for backing up recorded data recorded in an electronic computer is known (see Patent Document 1). The tape cartridge includes a tape reel on which a recording tape such as a magnetic tape is wound. The tape reel includes an integrated member having a hub and a lower flange formed integrally with the lower end of the hub, and an upper flange joined to the upper end surface of the hub. Generally, ultrasonic welding is used for joining the hub and the upper flange.
Japanese Patent Laid-Open No. 11-238352

  By the way, if the deflection or warpage of the upper flange is large, when the tape cartridge is loaded into the tape drive, the magnetic tape contacts the upper flange, or the upper flange contacts the inner surface of the casing that houses the tape reel. Therefore, it is desirable that the upper flange is highly accurate in deflection and warpage.

  The upper flange deflection and warpage accuracy is related not only to the accuracy of the upper flange, particularly the accuracy of the joint surface of the upper flange with the hub, but also to the accuracy of the integrated member, especially the upper end surface of the hub. In order to increase the accuracy of the deflection and warpage of the flange, it is necessary to adjust the shape (for example, unevenness and inclination) of the joint surface of the upper flange and the upper end surface of the hub.

  However, the upper flange joint surface and the upper end surface of the hub are generally formed by the same mold (for example, a mold piece) having a low degree of freedom. It is difficult to adjust the shape of the joint surface of the upper flange and the upper end surface of the hub as desired using a single mold that is not flexible. In addition, since the upper flange and the integrated member shrink afterwards, this aftershrinkage must also be taken into account, and it is even more difficult to adjust the shape of the joint surface of the upper flange and the upper end surface of the hub as intended. is there. As described above, it is difficult to increase the accuracy of deflection and warpage of the upper flange by the above-described molding method of the upper flange and the integrated member.

  The present invention has been made in view of such points, and an object thereof is to easily increase the accuracy of deflection and warpage of the upper flange.

  A first invention is a method for forming an integrated member having a hub having an upper flange joined to an upper end surface thereof and a lower flange formed integrally with a lower end of the hub, the first mold, A second mold disposed opposite to the mold and formed with molding holes for molding at least the inner and outer peripheral surfaces of the hub; and the first and the second mold, respectively. It is inserted from the surface opposite to the first mold so as to extend in the opposing direction of the second mold and are arranged on the same circumference corresponding to the molding hole, and faces the molding hole. A plurality of mold pieces having a molding surface for molding a part of the upper end surface of the hub, and the position of the molding surface of each mold piece in the opposing direction can be adjusted. An integrated member molding die for molding the member is provided, and the integral The member mold is characterized in that molding the integrated member.

  As described above, the integrated member molding die is disposed to face the first die and the first die, and has a molding hole for molding at least the inner peripheral surface and the outer peripheral surface of the hub. The first mold so that the second mold is disposed on the same circumference corresponding to the molding hole and extending in the opposing direction of the first mold and the second mold, respectively. And a plurality of mold pieces that are inserted from the opposite surface and face the forming hole and have a forming surface for forming a part of the upper end surface of the hub. And the position regarding the opposing direction of the 1st and 2nd metal mold | die of the molding surface of each metal mold | die piece is adjustable. For this reason, after performing the comparatively simple operation | work which adjusts the position regarding the opposing direction of the 1st and 2nd metal mold | die of the shaping | molding surface of each metal mold | die piece, by molding an integrated member with the metal mold | die for integral member molding The shape of the upper end surface of the hub can be adjusted as desired. Therefore, it is possible to easily increase the accuracy of deflection and warpage of the upper flange.

  A second invention is characterized in that, in the first invention, each of the mold pieces is arranged at a predetermined angle on the same circumference.

  As a result, the mold pieces are arranged at a constant angle on the same circumference, that is, evenly, so that the upper end surface of the hub can be surely compared with the case where the arrangement angles are different from each other. It becomes possible to adjust the shape of as desired. For this reason, it is possible to easily and reliably increase the accuracy of deflection and warpage of the upper flange.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the position of the molding surface of each mold piece in the facing direction is the same as the shape of the upper end surface of the hub of the integrated member. After adjusting the shape so that the accuracy of at least one of the deflection and warping of the upper flange of the reel is higher than a predetermined reference, the integrated member is molded by the integrated member molding die. It is a feature.

  As a result, the position of the molding surface of each mold piece with respect to the opposing direction of the first and second molds, the shape of the upper end surface of the hub of the integrated member, the deflection of the upper flange of the tape reel using this integrated member, and Since the adjustment is made so that the accuracy of at least one of the warpage is higher than a predetermined reference, the accuracy of the deflection and warpage of the upper flange can be easily and reliably increased.

  A fourth invention is a method of forming an upper flange joined to an upper end surface of the hub in an integrated member having a hub and a lower flange formed integrally with the lower end of the hub, A second mold disposed opposite to the first mold, and the same corresponding to the inner peripheral side of the cavity extending to the second mold in the opposing direction of the first and second molds. Inserted from the surface opposite to the first mold so as to be arranged on the circumference, facing the cavity, and forming a part of the joint surface with the hub on the lower surface of the upper flange An upper flange molding die for molding the upper flange, the position of the molding surface of each mold piece being adjustable with respect to the facing direction. Provided, the upper flange molding die above It is characterized in that for molding the flange.

  As described above, the upper flange molding die includes the first die, the second die disposed opposite to the first die, and the first die and the second die, respectively. A hub that is inserted from a surface opposite to the first mold so as to be disposed on the same circumference corresponding to the inner peripheral side of the cavity and that extends in the opposite direction, faces the cavity, and is located on the lower surface of the upper flange And a plurality of mold pieces having a molding surface for molding a part of the joint surface. And the position regarding the opposing direction of the 1st and 2nd metal mold | die of the molding surface of each metal mold | die piece is adjustable. For this reason, after adjusting the position of the molding surface of each mold piece in the opposing direction of the first and second molds, the upper flange is molded by the upper flange molding mold. The shape of the joint surface of the flange can be adjusted as desired. Therefore, it is possible to easily increase the accuracy of deflection and warpage of the upper flange.

  According to a fifth aspect, in the fourth aspect, the mold pieces are arranged at predetermined angles on the same circumference.

  As a result, each mold piece is arranged at a constant angle on the same circumference, that is, evenly, so that the upper flange can be securely joined as compared with the case where the arrangement angles are different from each other. The shape of the surface can be adjusted as desired. For this reason, it is possible to easily and reliably increase the accuracy of deflection and warpage of the upper flange.

  According to a sixth aspect of the present invention, in the fourth or fifth aspect of the invention, the position of the molding surface of each mold piece in the facing direction is determined, the shape of the joint surface of the upper flange is the tape reel using the upper flange. The upper flange is adjusted so that the accuracy of at least one of the deflection and warpage of the upper flange is higher than a predetermined reference.

  Accordingly, the position of the molding surface of each mold piece in the opposing direction of the first and second molds is determined so that the shape of the joint surface of the upper flange is at least of the deflection and warpage of the upper flange in the tape reel using the upper flange. Since the adjustment is made so that the accuracy of one side becomes higher than a predetermined reference, the accuracy of deflection and warpage of the upper flange can be easily and reliably increased.

  A seventh invention is an integrated member molding die for molding an integrated member having a hub whose upper flange is joined to the upper end surface and a lower flange integrally formed at the lower end of the hub. A first mold, a second mold that is disposed opposite to the first mold, and has molding holes for molding at least the inner and outer peripheral surfaces of the hub, respectively, The second mold is inserted from the surface opposite to the first mold so as to extend in the opposing direction of the first and second molds and to be disposed on the same circumference corresponding to the molding hole. And a plurality of mold pieces facing the molding hole and having a molding surface for molding a part of the upper end surface of the hub, and positions of the molding surfaces of the mold pieces in the facing direction. Is characterized by being adjustable.

  Thereby, the same effect as that of the first invention can be obtained.

  In an eighth aspect based on the seventh aspect, the mold pieces are arranged at predetermined angles on the same circumference.

  Thereby, the same effect as that of the second invention can be obtained.

  According to a ninth aspect of the present invention, in the seventh or eighth aspect of the invention, the position of the molding surface of each mold piece in the facing direction is such that the shape of the upper end surface of the hub of the integrated member is the tape using the integrated member. The reel is adjusted so that the accuracy of at least one of the deflection and warpage of the upper flange of the reel is higher than a predetermined reference.

  Thereby, the same effect as that of the third invention can be obtained.

  A tenth aspect of the invention is an upper flange molding die for molding an upper flange to be joined to the upper end surface of the hub in an integrated member having a hub and a lower flange formed integrally with the lower end of the hub. A first mold, a second mold disposed opposite to the first mold, and a cavity extending from the second mold in the opposing direction of the first and second molds. And is inserted from the surface opposite to the first mold so as to be arranged on the same circumference corresponding to the inner circumference side of the mold, and faces the cavity and is joined to the hub on the lower surface of the upper flange. A plurality of mold pieces having a molding surface for molding a part of the surface, and the position of the molding surface of each mold piece in the facing direction is adjustable. It is.

  Thereby, the same effect as that of the fourth invention can be obtained.

  An eleventh invention is characterized in that, in the tenth invention, each of the mold pieces is arranged at a predetermined angle on the same circumference.

  Thereby, the same effect as that of the fifth aspect can be obtained.

  According to a twelfth aspect of the invention according to the tenth or eleventh aspect of the invention, the position of the molding surface of each mold piece in the facing direction is such that the shape of the joint surface of the upper flange is the tape reel using the upper flange. The upper flange is adjusted so that the accuracy of at least one of the deflection and warpage of the upper flange is higher than a predetermined reference.

  Thereby, the same effect as that of the sixth invention can be obtained.

  A thirteenth invention is an integrated member having a hub whose upper flange is joined to the upper end surface and a lower flange formed integrally with the lower end of the hub, and is the invention according to any one of the first to third inventions. It is characterized by being formed by a method for forming an integrated member.

  Thereby, by using this integrated member, it is possible to obtain a tape reel with high accuracy of deflection and warpage of the upper flange.

  14th invention is an upper flange joined to the upper end surface of this hub in the integrated member which has a hub and the lower flange integrally formed in the lower end of this hub, Comprising: Any one of 4-6 It is characterized by being formed by the method of forming the upper flange of one invention.

  Thereby, by using this upper flange, it becomes possible to obtain a tape reel with high accuracy of deflection and warpage of the upper flange.

  A fifteenth aspect of the present invention is a tape reel comprising an integrated member having a hub and a lower flange formed integrally with the lower end of the hub, and an upper flange joined to the upper end surface of the hub, The integrated member is the integrated member of the thirteenth invention.

  As a result, it is possible to obtain a tape reel with high accuracy of deflection and warping of the upper flange.

  A sixteenth invention is a tape reel comprising an integrated member having a hub and a lower flange formed integrally with the lower end of the hub, and an upper flange joined to the upper end surface of the hub, The upper flange is the upper flange of the fourteenth invention.

  As a result, it is possible to obtain a tape reel with high accuracy of deflection and warping of the upper flange.

  A seventeenth invention is a tape comprising a tape reel comprising an integrated member having a hub and a lower flange integrally formed at the lower end of the hub, and an upper flange joined to the upper end surface of the hub. It is a cartridge, The said tape reel is a tape reel of 15th or 16th invention, It is characterized by the above-mentioned.

  Thereby, it is possible to obtain a tape cartridge with high accuracy of deflection and warpage of the upper flange.

  According to the present invention, the integrated member molding die is disposed opposite to the first die and the first die, and the molding hole for molding at least the inner peripheral surface and the outer peripheral surface of the hub. The first mold is disposed so as to extend on the second mold in the opposing direction of the first and second molds and are arranged on the same circumference corresponding to the molding holes. A plurality of mold pieces that are inserted from the opposite surface and face the molding hole and have a molding surface for molding a part of the upper end surface of the hub. Since the position of the surface in the opposing direction of the first and second molds can be adjusted, the relatively simple work of adjusting the position of the molding surface of each mold piece in the opposing direction of the first and second molds After forming the integrated member with the integrated member molding die, the upper end of the hub It is possible to adjust the shape at will, it is possible to increase the accuracy of the deflection or warpage of the upper flange easily.

  According to another invention, the upper flange forming mold includes a first mold, a second mold disposed opposite to the first mold, and a first mold and a second mold on the second mold, respectively. It is inserted from the surface opposite to the first mold so as to extend in the opposite direction of the mold and be arranged on the same circumference corresponding to the inner peripheral side of the cavity, and faces the cavity and faces the upper flange. A plurality of mold pieces having a molding surface for molding a part of a joint surface with the hub on the lower surface, and positions of the molding surfaces of the respective mold pieces in the opposing direction of the first and second molds. After adjusting the position of the molding surface of each mold piece with respect to the opposing direction of the first and second molds, the upper flange is molded by the upper flange molding mold. Adjust the shape of the joint surface of the upper flange as desired by molding It allows, it is possible to increase the accuracy of the deflection or warpage of the upper flange easily.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
-Configuration of magnetic tape cartridge-
First, the configuration of the magnetic tape cartridge according to Embodiment 1 of the present invention will be described.

  A magnetic tape cartridge is a one-reel (single reel) type cartridge-type information recording medium conforming to the LTO (Linear Tape Open) standard used as a storage device for backing up recorded data recorded in an electronic computer, for example. is there. As shown in FIG. 1, the magnetic tape cartridge 1 includes a casing 2, a tape reel 3, a lock release tool 4, a reel presser 5, a spring 6, a cartridge memory 7, and a write protect plug 8.

  The casing 2 includes an upper case 21 and a lower case 22 made of synthetic resin. The upper case 21 and the lower case 22 are each formed in a shallow dish shape having a square shape in plan view. Guide protrusions (not shown) are formed on the inner surface of the upper case 21. The casing 2 is formed in a substantially flat cubic shape by fitting the upper case 21 and the lower case 22 with each other. Inside the casing 2, a tape reel 3 is rotatably accommodated. The casing 2 is formed with a tape outlet 2a for drawing a magnetic tape (not shown) wound around the tape reel 3 to the outside. The tape outlet 2a is covered with a thin plate-like lid 23 so as to be opened and closed.

  As shown in FIGS. 1 and 2, the tape reel 3 includes a synthetic resin integrated member 33 having a hub 31 and a lower flange 32, and a synthetic resin upper flange 34. The hub 31 is formed in a bottomed cylindrical shape whose upper end is open and whose lower end is closed. A locked gear 31 b is formed on the upper surface of the bottom 31 a of the hub 31. A metal suction plate 35 is attached to the center side of the bottom surface of the bottom 31 a of the hub 31. When the magnetic tape cartridge 1 is loaded into a tape drive (not shown) (hereinafter referred to as “when loading the magnetic tape cartridge 1”), the suction plate 35 is magnetically attracted to the drive shaft of the tape drive (not shown). It has come to be. A driven gear 31 c is formed on the outer peripheral side of the bottom surface of the bottom 31 a of the hub 31. When the magnetic tape cartridge 1 is loaded, the driven gear 31c is engaged with the drive shaft of the tape drive, thereby transmitting the driving force to the tape reel 3 to rotate the tape reel 3. . An opening 31 d is formed in the bottom 31 a of the hub 31. A magnetic tape is wound around the outer peripheral surface of the cylindrical portion 31 e of the hub 31. The lower flange 32 is formed in an annular shape. The lower flange 32 is integrally formed in a bowl shape at the lower end of the hub 31. The upper flange 34 is formed in an annular shape. On the inner peripheral side of the lower surface of the upper flange 34, a protrusion 34a is formed so as to protrude downward. The protrusion 34a is formed in an annular shape. The protruding portion 34 a is fitted into the cylindrical portion 31 e of the hub 31 from its upper end opening. In the upper flange 34, a radially outer portion of the protrusion 34a on the inner peripheral side of the lower surface thereof is attached and joined to the upper end surface 31f of the hub 31 in a hook shape by ultrasonic welding. That is, the radially outer portion of the protrusion 34 a on the inner peripheral side of the lower surface of the upper flange 34 constitutes a joint surface 34 b that is joined to the upper end surface 31 f of the hub 31. As shown in FIG. 3, in the state before being joined to the upper end surface 31f of the hub 31, an energy director 34c having a triangular shape in cross section and a plane receiving seat 34d protruding downward are alternately arranged on the joining surface 34b. 8 are formed each. Each of these energy directors 34c and each of the plane receiving seats 34d are arranged every 45 degrees on the same circumference with the central axis of the upper flange 34 as the center. The upper flange 34 is formed by a conventionally known upper flange molding die (not shown).

  As shown in FIG. 1, the unlocking tool 4 is arranged between the upper surface of the bottom 31a of the hub 31 and the reel presser 5, and the claw portion 41 is an opening 31d of the bottom 31a of the hub 31 (see FIG. 2). Through the bottom 31a of the hub 31. When the magnetic tape cartridge 1 is loaded, the lock releaser 4 is pushed up by the drive shaft of the tape drive to push up the reel presser 5 against the urging force of the spring 6. The reel presser 5 is engaged with the guide projection of the upper case 21 so as to be slidable in the vertical direction and not to be relatively rotatable. A lock gear (not shown) is formed on the lower surface of the reel presser 5. When the magnetic tape cartridge 1 is not loaded in the tape drive, the lock gear regulates the rotation of the tape reel 3 by engaging with the locked gear 31b of the hub 31, while the hub is not loaded. The tape reel 3 is allowed to rotate by releasing the engagement of the 31 with the locked gear 31b.

  The spring 6 is disposed between the upper case 21 and the reel presser 5 and biases the reel presser 5 downward (tape reel 3 side). The cartridge memory 7 is attached in the lower case 22 and stores manufacturing information, usage history information, magnetic tape partition information, and the like of the magnetic tape cartridge 1. The write protect plug 8 is for preventing erroneous erasure of data recorded on the magnetic tape cartridge 1. The write protect plug 8 is attached to the casing 2 so as to be slidable between a data erasure permission position and a data erasure prohibition position.

-Configuration of integrated member molding die-
Next, the structure of the integrated member molding die for molding the integrated member 33 will be described.

  As shown in FIG. 4, the integrated member molding die 9 is composed of a fixed side die (first die) 91, a movable side die (second die) 92, and 12 divided and independent dies. The mold pieces 93, 93,. The fixed-side mold 91 is for molding the lower surface of the bottom 31a of the hub 31 and the lower surface of the lower flange 32, that is, the lower surface of the lower flange 32 of the integrated member 33. The movable-side mold 92 includes a part of the upper end surface 31f of the hub 31, the inner peripheral surface of the cylindrical portion 31e, the outer peripheral surface of the cylindrical portion 31e, the upper surface of the bottom portion 31a, and the upper surface of the lower flange 32, that is, the bottom of the integrated member 33. This is for molding the upper surface side of the flange 32. The movable side mold 92 is disposed opposite to the fixed side mold 91, and is opposed to the fixed side mold 91 and the movable side molds 91, 92 (the thickness direction of the movable side mold 92. In the present embodiment, the mold is closed and opened by sliding in the vertical direction.

  A molding hole for molding a part of the inner circumferential surface of the cylindrical portion 31e, the outer circumferential surface of the cylindrical portion 31e, and the upper end surface 31f of the hub 31 on the lower surface of the movable mold 92 (the surface on the fixed mold 91 side). 92a is formed. The molding hole 92a has an annular shape when viewed in the vertical direction. The bottom surface (upper surface) of the molding hole 92 a is for molding a part of the upper end surface 31 f of the hub 31.

  Twelve insertion holes 92b are formed on the upper surface of the movable die 92 (the surface opposite to the fixed die 91). Each insertion hole 92b extends in the vertical direction, and opens on the upper surface of the movable mold 92 and the bottom surface of the molding hole 92a. Each insertion hole 92b is arranged every 30 degrees on the same circumference corresponding to the molding hole 92a, with the central axis of the molding hole 92a as the center. Each insertion hole 92b has a circular shape when viewed in the vertical direction. At the upper end of the inner peripheral surface of each insertion hole 92b, a stepped portion 92c that extends radially outward is formed. A mold piece 93 is inserted into each insertion hole 92 b from the upper surface of the movable mold 92.

  Each mold piece 93 has a pin shape that is circular when viewed in the vertical direction. A head 93 a is formed at the upper end of each mold piece 93. The head portion 93a is received by the step portion 92c of the insertion hole 92b. The front end surface (lower end surface) of each mold piece 93 faces the forming hole 92a and constitutes a forming surface 93b for forming a part of the upper end surface 31f of the hub 31.

  The position in the vertical direction of the molding surface 93b of each mold piece 93 (hereinafter, the “position in the vertical direction” is referred to as the height position) can be adjusted. Specifically, when the height position of the molding surface 93b of the mold piece 93 is moved upward, for example, the vertical length between the lower surface of the head 93a and the molding surface 93b is the current length of the mold piece 93. Replace with another one shorter than the one in use, insert a shim between the lower surface of the head 93a of the mold piece 93 and the bottom surface (lower surface) of the step 92c of the insertion hole 92b, or the step of the insertion hole 92b Meat is piled up on the bottom surface of the portion 92c by welding. On the other hand, when moving the height position of the molding surface 93b of the mold piece 93 downward, for example, the vertical length between the lower surface of the head 93a and the molding surface 93b is currently in use. It replaces with another thing longer than the thing, and the lower surface of the head 93a of the die piece 93 is shaved. As described above, by adjusting the height position of the molding surface 93b of the mold piece 93, the molding surface 93b of the mold piece 93 is protruded below the bottom surface of the molding hole 92a, or the molding hole is formed. It is flush with the bottom surface of 92a or is recessed above the bottom surface of the molding hole 92a. In FIG. 4, the molding surface 93b of each mold piece 93 is flush with the bottom surface of the molding hole 92a. Moreover, the dashed-dotted line of FIG. 4 represents the height position of the bottom face of the shaping | molding hole 92a.

  When adopting a method of exchanging the mold piece 93, it is desirable to prepare a plurality of types of mold pieces 93 in advance. From the viewpoint of mass production of the integrated member 33, it is desirable to adopt a method of exchanging the die piece 93.

-Molding method of integrated member-
Next, a method for forming the integrated member 33 using the integrated member forming die 9 will be described.

  First, before the integrated member 33 is actually formed using the integrated member forming die 9, the integrated member 33 is experimentally formed using the integrated member forming die 9. Specifically, the height position of the molding surface 93b of each mold piece 93 is arbitrarily adjusted. For example, the molding surface 93b of each mold piece 93 is flush with the bottom surface of the molding hole 92a (see FIG. 4). Then, the integrated member molding die 9 is closed, and an injection molding machine (not shown) is driven to inject synthetic resin. Thereby, as shown in FIG. 5, high-pressure synthetic resin is supplied from the resin introduction passage (not shown) of the integrated member molding die 9 to the cavity 9a of the integrated member molding die 9. Become. By completing the supply of the synthetic resin into the cavity 9a, the synthetic resin is filled in the cavity 9a. The synthetic resin supplied into the cavity 9a is solidified when the resin temperature decreases by natural cooling from the start of supply into the cavity 9a, and the resin temperature reaches the solidification temperature. Thereafter, the movable die 92 is moved to the opposite side of the fixed die 91 to open the integrated member molding die 9, and the molded integrated member 33 is used as the integrated member molding die. Take out from 9. Thus, a test product of the integrated member 33 (hereinafter referred to as an integrated member test product) is completed.

  Next, the upper flange 34 is ultrasonically welded to the hub 31 of the integrated member test product. By this ultrasonic welding, the energy director 34 c is melted by ultrasonic vibration and the upper flange 34 is welded to the hub 31. Thus, a test product of the tape reel 3 (hereinafter referred to as a tape reel test product) is completed.

  Next, the deflection and warpage of the upper flange 34 of the tape reel test product are measured using, for example, a roundness measuring device or a three-dimensional measuring device (both not shown).

  Next, the integrated member 33 is actually molded using the integrated member molding die 9. Specifically, the height position of the molding surface 93 b of each die piece 93 is set so that the shape of the upper end surface 31 f of the hub 31 of the integrated member 33 after molding is above the tape reel 3 using the integrated member 33. Adjustment is made based on the measurement results of the deflection and warpage of the upper flange 34 of the tape reel test product so that the accuracy of the deflection and warpage of the flange 34 is higher than a predetermined high accuracy standard. That is, the height of the molding surface 93b of each die piece 93 is set so that the accuracy of deflection and warpage of the upper flange 34 of the tape reel 3 using the molded integrated member 33 is higher than a predetermined high accuracy standard. By adjusting the position based on the measurement result, the unevenness (flatness) of the upper end surface 31f of the hub 31 of the formed integrated member 33, the inclination with respect to the horizontal direction (left-right direction in FIG. 5), and the like are adjusted.

  For example, when one radial side (the left side in FIG. 2) of the upper flange 34 of the tape reel test product is tilted downward from the other side, as shown in FIG. 7 of the mold piece 93 (left mold piece 93 in FIG. 6) corresponding to one side in the radial direction is moved upward by a predetermined amount, or as shown in FIG. The position of the molding surface 93b of the mold piece 93 corresponding to the other side in the direction (the right mold piece 93 in FIG. 7) is moved downward by a predetermined amount. These predetermined amounts are set so that, for example, the inclination of the upper flange 34 of the tape reel 3 using the molded integrated member 33 with respect to the horizontal direction (left-right direction in FIG. 2) is smaller than a predetermined high-precision reference angle. It has been calculated. 6 and 7, the movement amount of the molding surface 93b of the die piece 93 is exaggerated for easy understanding, but in reality, the movement amount is slight. Moreover, the dashed-dotted line of FIG. 6, FIG. 7 represents the height position of the bottom face of the shaping | molding hole 92a.

  Then, after adjusting the height position of the molding surface 93 b of the mold piece 93, the integrated member 33 is actually molded using the integrated member molding die 9. This forming process is the same as the process in the case where the integrated member 33 is formed on a trial basis. Thus, a molded product of the integrated member 33 (hereinafter referred to as an integrated member molded product) is completed.

  Here, as described above, by adjusting the height position of the molding surface 93b of each die piece 93, the shape of the upper end surface 31f of the hub 31 of the integrated member molded product uses the integrated member molded product. The tape reel 3 has such a shape that the accuracy of deflection and warpage of the upper flange 34 is higher than a predetermined high accuracy standard. That is, by adjusting the height position of the molding surface 93b of each die piece 93, the unevenness of the upper end surface 31f of the hub 31 of the integrated member molded product 33, the inclination with respect to the horizontal direction, etc. The accuracy of deflection and warpage of the upper flange 34 of the tape reel 3 used is adjusted to be higher than a predetermined high accuracy standard.

  For example, as described above, when the radial direction one side of the upper flange 34 of the tape reel test product is inclined downward relative to the other side, as shown in FIG. When the position of the molding surface 93b of the mold piece 93 corresponding to one side in the radial direction is moved upward by a predetermined amount, the mold piece 93 on the upper end surface 31f of the hub 31 of the integrated member molded product The shape of the corresponding portion is a shape protruding above the portion corresponding to the die piece 93 on the upper end surface 31f of the hub 31 of the integrated member test product.

  Further, as described above, when one radial direction side of the upper flange 34 of the tape reel test product is tilted downward from the other side, as shown in FIG. 7, the mold pieces 93, 93,. When the position of the molding surface 93b of the mold piece 93 corresponding to the other side in the radial direction is moved downward by a predetermined amount, the mold piece 93 on the upper end surface 31f of the hub 31 of the integrated member molded product. The shape of the portion corresponding to is recessed below the portion corresponding to the die piece 93 on the upper end surface 31f of the hub 31 of the integrated member test product.

-Tape reel manufacturing method-
Next, a method for manufacturing the tape reel 3 will be described. That is, the upper flange 34 is ultrasonically welded to the hub 31 of the integrated member molded product. Thus, a manufactured product of the tape reel 3 (hereinafter referred to as a tape reel manufactured product) is completed. As described above, the shape of the upper end surface 31f of the hub 31 of the integrated member molded product is the same as that of the upper flange 34 of the tape reel 3 using the integrated member molded product. By making the shape higher than the reference, the accuracy of deflection and warpage of the upper flange 34 of the tape reel manufactured product becomes higher than a predetermined high accuracy reference, respectively.

  For example, as described above, when the radial direction one side of the upper flange 34 of the tape reel test product is inclined downward relative to the other side, as shown in FIG. By moving the position of the molding surface 93b of the mold piece 93 corresponding to one side in the radial direction upward by a predetermined amount, it corresponds to the mold piece 93 on the upper end surface 31f of the hub 31 of the integrated member molded product. When the shape of the portion to be protruded is higher than the portion corresponding to the die piece 93 on the upper end surface 31f of the hub 31 of the integrated member test product, or as shown in FIG. , 93,..., The molding surface 93b of the die piece 93 corresponding to the other radial side is moved downward by a predetermined amount to thereby move the upper end surface 31f of the hub 31 of the integrated member molded product. Parts corresponding to the mold piece 93 Is recessed below the portion corresponding to the die piece 93 on the upper end surface 31f of the hub 31 of the integrated member test product, with respect to the horizontal direction of the upper flange 34 of the tape reel manufactured product. The inclination is smaller than a predetermined high-precision reference angle.

  The accuracy of deflection and warpage of the upper flange 34 of the tape reel manufactured product is related not only to the accuracy of the upper end surface 31f of the hub 31, but also to the accuracy of the joining surface 34b of the upper flange 34 and the accuracy of ultrasonic welding. In the present embodiment, these accuracies are assumed to be constant, and the accuracies are not considered.

-Effect-
As described above, according to the present embodiment, the integrated member molding die 9 is disposed so as to face the fixed side die 91 and the fixed side die 91, and at least the inner peripheral surface and the outer periphery of the hub 31. A movable mold 92 having a molding hole 92a for molding a surface, and the movable mold 92 extend in the opposite direction of the fixed side and movable molds 91, 92, and correspond to the molding hole 92a. The molding surface is inserted from the surface opposite to the fixed mold 91 so as to be arranged on the same circumference and faces the molding hole 92a and molds a part of the upper end surface 31f of the hub 31. 12 mold pieces 93 having 93b. And the position regarding the fixed direction of the molding surface 93b of each mold piece 93 and the opposing direction of the movable molds 91 and 92 can be adjusted. For this reason, after a relatively simple operation of adjusting the positions of the molding surfaces 93b of the respective mold pieces 93 in the opposing direction of the fixed side and the movable side molds 91 and 92, the integrated member molding die 9 is integrated. By forming the forming member 33, the shape of the upper end surface 31f of the hub 31 can be adjusted as desired. Therefore, it is possible to easily increase the accuracy of deflection and warpage of the upper flange 34.

  In addition, since the respective mold pieces 93 are arranged on the same circumference at a constant angle, that is, evenly, compared to the case where the arrangement angles are different from each other, the upper side of the hub 31 is surely secured. The shape of the end face 31f can be adjusted as desired. For this reason, it is possible to easily and reliably increase the accuracy of deflection and warpage of the upper flange 34.

  Further, the position of the molding surface 93b of each mold piece 93 in the opposing direction of the fixed side and the movable side molds 91 and 92 is determined by the shape of the upper end surface 31f of the hub 31 of the integrated member 33. Since the adjustment of the deflection and warpage of the upper flange 34 of the tape reel 3 is adjusted so as to be higher than the predetermined high accuracy standard, the deflection and warpage accuracy of the upper flange 34 can be simplified. It is possible to increase the height reliably.

  In the present embodiment, twelve mold pieces 93 are provided, but two to eleven or thirteen or more may be provided.

  In the present embodiment, a part of the upper end surface 31f of the hub 31 is formed by the mold piece 93, but the entire upper end surface 31f of the hub 31 may be formed.

(Embodiment 2)
In the magnetic tape cartridge 1 according to this embodiment, the upper flange 34 is formed by an upper flange molding die described below. The integrated member 33 is formed by a conventionally known upper flange molding die (not shown). About another point, it is the structure substantially the same as Embodiment 1 (refer FIGS. 1-3).

-Configuration of upper flange molding die-
First, the configuration of the upper flange molding die 10 for molding the upper flange 34 will be described.

  As shown in FIG. 8, the upper flange molding die 10 includes a fixed side die (first die) 101, a movable side die (second die) 102, and eight divided independent dies. The pieces 103, 103,... The movable side mold 102 is disposed opposite to the fixed side mold 101, and is opposed to the fixed side mold 101 and the fixed side and the movable side molds 101, 102 (the thickness direction of the movable side mold 102. In the present embodiment, the mold is closed and opened by sliding in the vertical direction.

  The fixed-side mold 101 is for molding the upper surface (lower surface in FIG. 8) of the upper flange 34 and the inner peripheral surface of the protrusion 34a, that is, the upper surface side of the upper flange 34. On the upper surface of the fixed mold 101, a molding recess 101a for molding the upper surface of the upper flange 34 is formed. The molding recess 101a has an annular shape when viewed from the up-down direction. On the upper surface side of the fixed mold 101, a molding convex portion 101b for molding the inner peripheral surface of the protrusion 34a of the upper flange 34 is formed on the radially inner side of the molding concave portion 101a. The forming convex portion 101b has a circular shape when viewed in the vertical direction.

  The movable side mold 102 is for molding the lower surface of the upper flange 34 and the outer peripheral surface of the protrusion 34a, that is, the lower surface side of the upper flange 34. A first molding recess 102 a for molding most of the lower surface of the upper flange 34 is formed on the lower surface of the movable mold 102. The first molding recess 102a has an annular shape when viewed from the vertical direction. On the lower surface side of the movable mold 102, a second molding recess 102b for molding the outer peripheral surface of the protrusion 34a of the upper flange 34 is formed on the radially inner side of the first molding recess 102a. The second molding recess 102b has a circular shape when viewed in the up-down direction. In the second molding recess 102, the molding convex portion 101 b of the fixed mold 101 is arranged so that the central axis thereof coincides with the central axis of the second molding concave portion 102. As described above, the cavity 10a of the upper flange molding die 10 has an annular shape when viewed in the vertical direction.

  Eight insertion holes 102 c are formed on the upper surface of the movable mold 102. Each insertion hole 102c extends in the vertical direction, and opens on the upper surface of the movable mold 102 and the bottom surface of the first molding recess 102a. Each insertion hole 102c is on the same circumference corresponding to the inner peripheral side (the inner peripheral side of the cavity 10a) of the first molding concave portion 102a, with the central axis of the first molding concave portion 102a (the central axis of the cavity 10a) as the center. Are arranged every 45 degrees. Each insertion hole 102c has a circular shape when viewed from above and below. At the upper end of the inner peripheral surface of each insertion hole 102c, a stepped portion 102d that extends radially outward is formed. A mold piece 103 is inserted into each insertion hole 102c from the upper surface of the movable mold 102 (the surface opposite to the fixed mold 101).

  Each mold piece 103 has a pin-like shape that is circular when viewed in the vertical direction. A head 103 a is formed at the upper end of each mold piece 103. The head 103a is received by the step 102d of the insertion hole 102c. The front end surface (lower end surface) of each mold piece 103 faces the first molding recess 102a, and a molding surface 103b for molding a part of each flat seat 34d of the joint surface 34b on the lower surface of the upper flange 34. Is configured.

  The height position of the molding surface 103b of each mold piece 103 can be adjusted. Specifically, when the height position of the molding surface 103b of the mold piece 103 is moved upward, for example, the vertical length of the mold piece 103 between the lower surface of the head 103a and the molding surface 103b is the current length. Replace with another one shorter than the one in use, insert a shim between the bottom surface of the head 103a of the mold piece 103 and the bottom surface (lower surface) of the step portion 102d of the insertion hole 102c, or step the insertion hole 102c Meat is piled up on the bottom surface of the portion 102d by welding. On the other hand, when the height position of the molding surface 103b of the mold piece 103 is moved downward, for example, the vertical length between the lower surface of the head 103a and the molding surface 103b is currently in use. It replaces with another thing longer than the thing, and the lower surface of the head 103a of the die piece 103 is shaved. As described above, by adjusting the height position of the molding surface 103b of the mold piece 103, the molding surface 103b of the mold piece 103 jumps out below the bottom surface of the first molding recess 102a, It is flush with the bottom surface of the first molding recess 102a, or is recessed above the bottom surface of the first molding recess 102a. In FIG. 8, the molding surface 103b of each mold piece 103 is flush with the bottom surface of the first molding recess 102a.

  When adopting a method for exchanging the mold piece 103, it is desirable to prepare a plurality of types of mold pieces 103 in advance. Further, from the viewpoint of mass production of the upper flange 34, it is desirable to adopt a method of exchanging the die piece 103.

-Molding method of upper flange-
Next, a method for forming the upper flange 34 using the upper flange molding die 10 will be described.

  First, before the upper flange 34 is actually molded using the upper flange molding die 10, the upper flange 34 is experimentally molded using the upper flange molding die 10. Specifically, the height position of the molding surface 103b of each mold piece 103 is arbitrarily adjusted. For example, the molding surface 103b of each mold piece 103 is flush with the bottom surface of the first molding recess 102a (see FIG. 8). Then, the upper flange molding die 10 is closed, and an injection molding machine (not shown) is driven to inject synthetic resin. As a result, as shown in FIG. 9, high-pressure synthetic resin is supplied from the resin introduction passage (not shown) of the upper flange molding die 10 to the cavity 10 a of the upper flange molding die 10. By completing the supply of the synthetic resin into the cavity 10a, the synthetic resin is filled in the cavity 10a. The synthetic resin supplied into the cavity 10a is solidified when the resin temperature decreases by natural cooling from the start of supply into the cavity 10a, and the resin temperature reaches the solidification temperature. Thereafter, the movable mold 92 is moved to the opposite side of the fixed mold 91 to open the upper flange molding mold 10, and the molded upper flange 34 is taken out from the upper flange molding mold 10. . Thus, a test product of the upper flange 34 (hereinafter also referred to as an upper flange test product) is completed.

  Next, the upper flange test product is ultrasonically welded to the hub 31 of the integrated member 33. By this ultrasonic welding, the energy director 34c is melted by ultrasonic vibration, and the upper flange test product is welded to the hub 31. Thus, a test product of the tape reel 3 (hereinafter referred to as a tape reel test product) is completed.

  Next, the deflection and warpage of the upper flange 34 of the tape reel test product are measured using, for example, a roundness measuring device or a three-dimensional measuring device (both not shown).

  Next, the upper flange 34 is actually molded using the upper flange molding die 10. Specifically, the height position of the molding surface 103b of each mold piece 103 is determined, and the shape of each flat receiving seat 34d of the joint surface 34b of the upper flange 34 after molding is the tape reel 3 using the upper flange 34. Adjustment is made based on the measurement results of the deflection and warpage of the upper flange 34 of the tape reel test product so that the accuracy of the deflection and warpage of the upper flange 34 is higher than a predetermined high accuracy standard. In other words, the height position of the molding surface 103b of each die piece 103 is set so that the accuracy of deflection and warpage of the upper flange 34 of the tape reel 3 using the upper flange 34 after molding is higher than a predetermined high accuracy standard. Is adjusted based on the measurement result, thereby adjusting the unevenness (flatness) of each flat seat 34d of the joint surface 34b of the upper flange 34 after molding, the inclination with respect to the horizontal direction (left-right direction in FIG. 9), and the like. .

  For example, when one radial direction side (the left side in FIG. 2) of the upper flange 34 of the tape reel test product is tilted downward from the other side, as shown in FIG. 11, the molding surface 103 b of the mold piece 103 (right mold piece 103 in FIG. 10) corresponding to one side in the radial direction is moved upward by a predetermined amount, or as shown in FIG. The position of the molding surface 103b of the mold piece 103 (left mold piece 103 in FIG. 11) corresponding to the other side in the direction is moved downward by a predetermined amount. These predetermined amounts are calculated, for example, so that the inclination of the upper flange 34 of the tape reel 3 using the upper flange 34 after molding with respect to the horizontal direction is smaller than a predetermined high-precision reference angle. In FIGS. 10 and 11, the movement amount of the molding surface 103 b of the mold piece 103 is exaggerated for easy understanding, but in reality, the movement amount is slight.

  Then, after adjusting the height position of the molding surface 103 b of the mold piece 103, the upper flange 34 is actually molded using the upper flange molding die 10. This molding process is the same as the process when the upper flange 34 is molded on a trial basis. Thus, a molded product of the upper flange 34 (hereinafter also referred to as an upper flange molded product) is completed.

  Here, as described above, by adjusting the height position of the molding surface 103b of each die piece 103, the shape of each flat receiving seat 34d of the joint surface 34b of the upper flange molded product becomes the upper flange molded product. The shape of the tape reel 3 using the tape reel 3 is such that the accuracy of deflection and warpage of the upper flange 34 is higher than a predetermined high accuracy standard. That is, by adjusting the height position of the molding surface 103b of each mold piece 103, the unevenness of each flat seat 34d of the joint surface 34b of the upper flange molded product, the inclination with respect to the horizontal direction, etc., the upper flange molded product The accuracy of the deflection and warpage of the upper flange 34 of the tape reel 3 using is adjusted so as to be higher than a predetermined high accuracy standard.

  For example, as described above, when the radial direction one side of the upper flange 34 of the tape reel test product is inclined downward relative to the other side, as shown in FIG. When the position of the molding surface 103b of the mold piece 103 corresponding to one side in the radial direction is moved upward by a predetermined amount, the mold piece in the flat receiving seat 34d of the joint surface 34b of the upper flange molded product The shape of the portion corresponding to 103 protrudes downward (upward in FIG. 10) from the portion corresponding to the die piece 103 in the flat seat 34d of the joint surface 34b of the upper flange test product.

  In addition, as described above, when the radial direction one side of the upper flange 34 of the tape reel test product is inclined downward relative to the other side, as shown in FIG. 11, the die pieces 103, 103,. When the position of the molding surface 103b of the mold piece 103 corresponding to the other side in the radial direction is moved downward by a predetermined amount, the mold in the flat seat 34d of the joint surface 34 of the upper flange molded product The shape of the portion corresponding to the piece 103 is a shape that is recessed above the portion corresponding to the die piece 103 in the flat receiving seat 34d of the joining surface 34 of the upper flange test product (lower side in FIG. 11).

-Tape reel manufacturing method-
Next, a method for manufacturing the tape reel 3 will be described. That is, the upper flange molded product is ultrasonically welded to the hub 31 of the integrated member 33. Thus, a manufactured product of the tape reel 3 (hereinafter referred to as a tape reel manufactured product) is completed. As described above, the shape of each flat surface receiving seat 34d of the joint surface 34b of the upper flange molded product is set so that the deflection and warpage accuracy of the upper flange 34 of the tape reel 3 using the upper flange molded product are predetermined. By adopting a shape that is higher than the high accuracy standard, the accuracy of deflection and warpage of the upper flange 34 of the tape reel manufactured product becomes higher than the predetermined high accuracy standard.

  For example, as described above, when the radial direction one side of the upper flange 34 of the tape reel test product is inclined downward relative to the other side, as shown in FIG. The mold piece 103 in the flat seat 34d of the joining surface 34b of the upper flange molded product is moved by moving the position of the molding surface 103b of the mold piece 103 corresponding to one side in the radial direction upward by a predetermined amount. When the shape of the portion corresponding to the upper flange test piece protrudes downward from the portion corresponding to the die piece 103 in the flat seat 34d of the joint surface 34b of the test product of the upper flange, or as shown in FIG. In addition, by moving the position of the molding surface 103b of the mold piece 103 corresponding to the other radial side of the mold pieces 103, 103,. The shape of the portion corresponding to the die piece 103 in the flat surface receiving seat 34d was made to be a shape recessed above the portion corresponding to the die piece 103 in the flat surface receiving seat 34d of the joint surface 34 of the upper flange test product. In some cases, the inclination of the upper flange 34 of the tape reel manufactured product with respect to the horizontal direction becomes smaller than a predetermined high-precision reference angle.

  The accuracy of deflection and warpage of the upper flange 34 of the tape reel manufactured product is related not only to the accuracy of the joint surface 34b of the upper flange 34 but also to the accuracy of the upper end surface 31f of the hub 31 and the accuracy of ultrasonic welding. In the present embodiment, these accuracies are assumed to be constant, and the accuracies are not considered.

-Effect-
As described above, according to the present embodiment, the upper flange molding die 10 includes the fixed-side die 101, the movable-side die 102 arranged to face the fixed-side die 101, and the movable-side die, respectively. A surface on the opposite side of the fixed mold 101 so as to extend in the opposite direction of the fixed and movable molds 101, 102 on the mold 102 and to be arranged on the same circumference corresponding to the inner peripheral side of the cavity 10a. 8 mold pieces 103 having a molding surface 103b that faces the cavity 10a and has a molding surface 103b for molding a part of each flat seat 34d of the joint surface 34b with the hub 31 on the lower surface of the upper flange 34, It has. And the position regarding the fixed direction of the molding surface 103b of each mold piece 103 and the opposing direction of the movable molds 101 and 102 can be adjusted. For this reason, after the relatively simple operation of adjusting the positions of the molding surfaces 103b of the respective mold pieces 103 in the opposing direction of the fixed side and the movable side molds 101 and 102, the upper flange is molded by the upper flange molding die 10. By molding 34, the shape of each flat seat 34d of the joint surface 34b of the upper flange 34 can be adjusted as desired. Therefore, it is possible to easily increase the accuracy of deflection and warpage of the upper flange 34.

  In addition, since the respective mold pieces 103 are arranged at a constant angle on the same circumference, that is, evenly, as compared with the case where the arrangement angles are made different from each other, the upper flange 34 can be reliably connected. It becomes possible to adjust the shape of each flat seat 34d of the joint surface 34b as desired. For this reason, it is possible to easily and reliably increase the accuracy of deflection and warpage of the upper flange 34.

  Further, the position of the molding surface 103b of each mold piece 103 in the fixed direction and the opposing direction of the movable molds 101, 102 is determined by the shape of each flat seat 34d of the joint surface 34b of the upper flange 34. The tape flange 3 is adjusted so that the accuracy of deflection and warpage of the upper flange 34 is higher than a predetermined high accuracy standard, so that the accuracy of deflection and warpage of the upper flange 34 is adjusted. Can be easily and reliably increased.

  In the present embodiment, eight mold pieces 103 are provided, but two to seven, or nine or more may be provided.

  Further, in this embodiment, a part of one plane receiving seat 34 on the joint surface 34b of the upper flange 34 is formed by one mold piece 103, but it is formed by two or more mold pieces 103. Also good.

(Other embodiments)
In each of the above embodiments, the present invention is employed in the single reel type magnetic tape cartridge 1, but may be employed in a multiple reel type magnetic tape cartridge.

  In each of the above embodiments, the first mold of the present invention is configured by the fixed mold 91; 101, and the second mold is configured by the movable mold 92; 102. May be configured by a movable mold, and the second mold may be configured by a fixed mold.

  Furthermore, in each said embodiment, although the fixed side metal mold | dies 91; 101 and the movable side metal mold | dies 92; 102 are each comprised by the single metal mold | die, you may each comprise by several metal mold | dies.

  Furthermore, in each of the above-described embodiments, the mold pieces 93; 103 are arranged at fixed angles on the same circumference, but the arrangement angles may be different from each other.

  Moreover, in each said embodiment, although each metal mold | die piece 93; 103 is formed in circular pin shape, you may form in shapes other than circular pin shape.

  The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is defined by the claims, and is not limited by the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the present invention can be applied to applications for easily increasing the accuracy of deflection and warpage of the upper flange.

It is a disassembled perspective view of the magnetic tape cartridge which concerns on Embodiment 1 and 2 of this invention. It is sectional drawing of the tape reel which concerns on Embodiment 1 and 2. FIG. It is a figure which shows the upper flange before joining to the hub upper end surface of the integrated member based on Embodiment 1 and 2, (a) is the bottom view, (b) is the sectional drawing. . It is a figure which shows the metal mold | die for integral member shaping | molding which concerns on Embodiment 1, (a) is the top view, (b) is the sectional drawing. FIG. 5 is a cross-sectional view showing a part of the molding process of the integrated member using the integrated member molding die according to the first embodiment. FIG. 5 is a cross-sectional view showing a part of the molding process of the integrated member using the integrated member molding die according to the first embodiment. FIG. 5 is a cross-sectional view showing a part of the molding process of the integrated member using the integrated member molding die according to the first embodiment. It is a figure which shows the metal mold | die for upper flange shaping | molding concerning Embodiment 2, (a) is the top view, (b) is the sectional drawing. It is sectional drawing which shows a part of shaping | molding process of the upper flange using the metal mold | die for upper flange shaping | molding concerning Embodiment 2. FIG. It is sectional drawing which shows a part of shaping | molding process of the upper flange using the metal mold | die for upper flange shaping | molding concerning Embodiment 2. FIG. It is sectional drawing which shows a part of shaping | molding process of the upper flange using the metal mold | die for upper flange shaping | molding concerning Embodiment 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnetic tape cartridge 3 Tape reel 31 Hub 31f Upper end surface 33 Integrated member 34 Upper flange 34b Joining surface 34d Plane receiving seat 9 Mold for forming integrated member 91 Fixed side mold (first mold)
92 Movable mold (second mold)
92a Molding hole 93 Mold piece 93b Molding surface 10 Upper flange mold 10a Cavity 101 Fixed mold (first mold)
102 Movable mold (second mold)
103 Mold piece 103b Molding surface

Claims (17)

A method of forming an integrated member having a hub with an upper flange joined to an upper end surface and a lower flange formed integrally with a lower end of the hub,
A first mold, a second mold that is disposed opposite to the first mold, and is formed with molding holes for molding at least the inner peripheral surface and the outer peripheral surface of the hub. The two molds are inserted from the surface opposite to the first mold so as to extend in the opposing direction of the first and second molds and be arranged on the same circumference corresponding to the molding holes. A plurality of mold pieces facing the molding hole and having a molding surface for molding a part of the upper end surface of the hub, and the position of the molding surface of each mold piece in the facing direction can be adjusted. An integrated member molding die for molding the integrated member is provided,
A method for forming an integrated member, wherein the integrated member is formed by the integrated member forming die. In the shaping | molding method of the integrated member of Claim 1,
The method of forming an integrated member, wherein each of the mold pieces is arranged at a predetermined angle on the same circumference. In the shaping | molding method of the integrated member of Claim 1 or 2,
The position of the molding surface of each mold piece in the facing direction is determined by the shape of the upper end surface of the hub of the integrated member, and the accuracy of at least one of the deflection and warpage of the upper flange of the tape reel using the integrated member is predetermined. After adjusting the shape to be higher than the standard,
A method for forming an integrated member, wherein the integrated member is formed by the integrated member forming die. A method of forming an upper flange to be joined to an upper end surface of the hub in an integrated member having a hub and a lower flange formed integrally with the lower end of the hub,
A first mold, a second mold disposed opposite to the first mold, and each extending in the second mold in a direction opposite to the first and second molds, and mutually inside the cavity One of the joint surfaces with the hub on the lower surface of the upper flange that is inserted from the surface opposite to the first mold so as to be disposed on the same circumference corresponding to the side and faces the cavity. A plurality of mold pieces having a molding surface for molding the portion, and an upper flange for molding the upper flange, the position of the molding surface of each mold piece being adjustable in the facing direction. There is a mold for molding,
A method for forming an upper flange, wherein the upper flange is formed by the upper flange molding die. In the upper flange molding method according to claim 4,
The method of forming an upper flange, wherein the respective mold pieces are arranged at a predetermined angle on the same circumference. In the upper flange molding method according to claim 4 or 5,
The position of the molding surface of each mold piece in the facing direction, the shape of the joint surface of the upper flange, and the accuracy of at least one of the deflection and warpage of the upper flange in the tape reel using the upper flange is based on a predetermined standard. A method of forming the upper flange, wherein the shape is adjusted so that the height is higher. An integrated member molding die for molding an integrated member having a hub with an upper flange joined to an upper end surface and a lower flange formed integrally with a lower end of the hub,
A first mold;
A second mold which is disposed opposite to the first mold and in which molding holes for molding at least the inner and outer peripheral surfaces of the hub are formed;
A surface opposite to the first mold so as to extend on the second mold in the opposing direction of the first and second molds and to be disposed on the same circumference corresponding to the molding hole. And a plurality of mold pieces facing the molding hole and having a molding surface for molding a part of the upper end surface of the hub,
An integrated member molding die, wherein a position of the molding surface of each mold piece in the facing direction is adjustable. In the integrated member molding die according to claim 7,
The mold for forming an integral member, wherein the mold pieces are arranged at a predetermined angle on the same circumference. The integrated member molding die according to claim 7 or 8,
The position of the molding surface of each mold piece in the facing direction is such that the shape of the upper end surface of the hub of the integrated member has a predetermined accuracy of at least one of deflection and warping of the upper flange of the tape reel using the integrated member. An integrated member molding die, which is adjusted so as to have a shape higher than a reference. An upper flange molding die for molding an upper flange joined to an upper end surface of the hub in an integrated member having a hub and a lower flange formed integrally with the lower end of the hub,
A first mold;
A second mold disposed opposite to the first mold;
Respectively opposite to the first mold so that the second mold extends in the opposing direction of the first and second molds and is disposed on the same circumference corresponding to the inner peripheral side of the cavity. A plurality of mold pieces having a molding surface for forming a part of a joint surface with the hub on the lower surface of the upper flange and facing the cavity.
The upper flange molding die, wherein the position of the molding surface of each mold piece in the facing direction is adjustable. The upper flange molding die according to claim 10,
The upper flange molding die, wherein each of the die pieces is arranged at a predetermined angle on the same circumference. The upper flange molding die according to claim 10 or 11,
The position of the molding surface of each mold piece in the facing direction is such that the shape of the joint surface of the upper flange is the accuracy of at least one of deflection and warpage of the upper flange in a tape reel using the upper flange from a predetermined reference. An upper flange molding die characterized by being adjusted so as to have a higher shape. An integrated member having a hub with an upper flange joined to the upper end surface and a lower flange formed integrally with the lower end of the hub,
An integrated member formed by the method for forming an integrated member according to claim 1. An upper flange joined to an upper end surface of the hub in an integrated member having a hub and a lower flange formed integrally with the lower end of the hub,
An upper flange, which is formed by the method for forming an upper flange according to any one of claims 4 to 6. A tape reel comprising: an integrated member having a hub and a lower flange formed integrally with the lower end of the hub; and an upper flange joined to the upper end surface of the hub,
The tape reel according to claim 13, wherein the integrated member is the integrated member according to claim 13. A tape reel comprising: an integrated member having a hub and a lower flange formed integrally with the lower end of the hub; and an upper flange joined to the upper end surface of the hub,
The tape reel according to claim 14, wherein the upper flange is the upper flange. A tape cartridge comprising: a tape reel comprising an integrated member having a hub and a lower flange formed integrally with the lower end of the hub; and an upper flange joined to the upper end surface of the hub,
The tape cartridge according to claim 15 or 16, wherein the tape reel is the tape reel.

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