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Molding mold, molding method and tape cartridge

a molding method and mold technology, applied in the direction of printing machines, instruments, magazine/cassette manufacturing apparatus, etc., can solve the problem of inability to maintain the predetermined configuration of the flang

Inactive Publication Date: 2007-12-13
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach effectively maintains the predetermined configuration of the flange, preventing contact between the tape-shaped recording medium and the flange, thus ensuring stable and secure recording and reproducing operations by minimizing deformation and maintaining accurate positioning.

Problems solved by technology

Namely, when a metal plate is molded integrally with a reel hub portion by an insert molding, shrinkage in the reel hub portion is obstructed by the insert-molded metal plate at a shrinkage process upon cooling and hardening, resulting in that the inventors obtained the comprehension that a predetermined configuration of the flange cannot be maintained because deformation of the flange occurs upon molding at a portion of the flange especially near the metal plate in comparison with a case without insert-molding.

Method used

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  • Molding mold, molding method and tape cartridge
  • Molding mold, molding method and tape cartridge
  • Molding mold, molding method and tape cartridge

Examples

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example

[0064] Next, description will be explained about an example the present invention in more detail. In FIG. 8, as an example, specified dimensions are defined. According to a standard as to a one-reel type tape cartridge for a computer, the height h1 of the root end 33a of the hub 32 in the lower flange 33 from the reference line r is within a range of 1.82 to 2.02 mm while the height h2 of the circumferential end 33b from the reference line r is within a range of 1.66 to 1.90 mm.

[0065] In the present example, a molding mold 110 as shown in FIG. 5 to FIG. 7 was produced, and a reel hub portion 3 in FIG. 1 (except for the upper flange 31) was molded.

[0066]FIG. 9 is a graph showing the height H of the flat area 106 of the molding mold 110 from the base line R in the present example, in which changing states between the height H before correction and the height H after correction are shown. X-axis of FIG. 9 shows a position in a diameter-direction at the flat area 106, in which ID corr...

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Abstract

A molding mold and a molding method are disclosed, for molding a flange configuration in which a flange of a reel hub portion can be maintained in a predetermined configuration. Also a tape cartridge is disclosed, which can securely prevent a tape-shaped recording medium from touching at the flange while the tape cartridge is being used. In the molding mold for molding, a flange configuration is produced, which is provided with a reel hub portion having a flange and a hub arranged at a substantially center of the flange and an insert portion disposed at a substantially center of the reel hub portion at an opposite side of the hub, and which includes: an insert attaching portion; a flange forming portion for forming the flange; and a hub forming portion for forming the hub; wherein in a forming surface of at a side of the hub forming portion of the flange forming portion, a dimension of a circular area over from a root end of the hub forming portion to a substantially intermediate portion between the root end and a circumferential end of the flange forming portion, is corrected in view of deformation upon molding.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a molding mold and a molding method for molding a flange configuration, and a tape cartridge. [0003] 2. Description of the Prior Art [0004] A one-reel-type cartridge is provided with a reel hub portion having an upper flange and a lower flange at an inside of the cartridge. A tape-shaped recording medium is wound around the hub portion, which is used for storing back-up data for a computer or the like. When the tape cartridge is mounted to a magnetic recording and reproducing apparatus for a computer, the tape-shaped recording medium wound around a hub of an internal reel hub portion is made to be drawn out, and thereafter wound around a reel hub portion at the side of the magnetic recording and reproducing apparatus, so that the tape-shaped recording medium runs between both the hubs, and recording or reproducing are performed. Also, a magnetic plate is attached to a center of the l...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G11B15/32B29C33/38B29C45/00G11B23/107B29C45/14B29C45/26G11B23/087G11B23/113
CPCB29C33/3835B29C45/0025B29C45/1459G11B23/08785B29C45/2616G11B23/08728B29C45/26
Inventor SATOH, TAKATERUSUZUKI, HIROKIMOMOI, AKIO
Owner TDK CORPARATION
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