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Injection molded article and magnetic sensor

A technology of injection molding and magnetoresistive components, which is applied to the casing, instruments, nano-magnetics of magnetic sensors, etc., can solve the problems of cost and time of correction processing, achieve uniform gap, eliminate the difference in forming shrinkage, suppress the The effect of the decrease in detection sensitivity

Inactive Publication Date: 2014-05-28
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the deformation of the injection molded part can be suppressed within a certain allowable error range, but there is a problem that the correction process takes cost and time

Method used

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  • Injection molded article and magnetic sensor
  • Injection molded article and magnetic sensor
  • Injection molded article and magnetic sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] Hereinafter, the structure of the injection molded article of the first embodiment will be described.

[0055] figure 1 It is a perspective view of the box body 1 as an injection molded part, figure 1 (A) is an overall perspective view, figure 1 (B) is a perspective view of a partial section.

[0056] Casing 1 is made up of bottom panel 2 as bottom part, right side panel 3 and left side panel 4 as side part, back panel 5, front panel 6, and it is that front panel 6-back panel 5 is strip type, The shape of the top side opening of the bottom panel 2. Since the opening is thus formed, the bottom panel 2 tends to shrink due to the shrinkage factor of the resin material during curing of the injection molding.

[0057] The box body 1 is an injection-molded part formed by injection-molding a resin material dispersed with long-fiber fillers 9, and the resin material is injection-molded into the metal mold from the front panel 6 side shown on the left side of the drawing. T...

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Abstract

An injection molded article that avoids differences in the amount of molding shrinkage among sites, that suppresses bow, and that is injection molded is provided. A case (1) is formed by injection molding of resin material in which long-fiber fillers (9) are distributed and includes a side plate (3, 4) and a bottom plate (2). The side plate (3, 4) and the bottom plate (2) are in substantially parallel with a mean orientation direction of the long-fiber fillers (9) therein. The side plate (3,4) is provided with orientation disturbing sections (8A) for partially displacing orientation directions of the long-fiber fillers (9) during injection molding. Deformation of the case (1) is adjustable by control on the orientation of the long-fiber fillers (9) using the orientation disturbing sections (8A).

Description

technical field [0001] The present invention relates to an injection-molded article made of injection-molded resin material, and a magnetic sensor for detecting magnetism such as a magnetic pattern printed on a banknote. Background technique [0002] A magnetic sensor that recognizes objects to be detected such as banknotes and securities printed with a predetermined magnetic pattern using magnetic ink or the like is used in various applications. [0003] Generally, a magnetic sensor has an elongated case, a plurality of magnetoresistive elements (hereinafter referred to as MR elements), and a magnet. (For example, refer to Patent Documents 1 and 2). The box body is provided with an opening for accommodating the magnet, and is configured so that the bottom panel is opposite to the banknotes, and the length direction of the box body is perpendicular to the conveying direction of the banknotes. A plurality of MR elements are arranged on the bottom panel of the box, respectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/37G01R33/09
CPCG01R33/0047B82Y25/00G01R33/093B29C45/0005B29C45/0046
Inventor 新村耕二户莳健治中村顺寿植田雅也西胁俊树
Owner MURATA MFG CO LTD