WO2009099173A1 - 射出成形品および磁気センサ - Google Patents
射出成形品および磁気センサ Download PDFInfo
- Publication number
- WO2009099173A1 WO2009099173A1 PCT/JP2009/052035 JP2009052035W WO2009099173A1 WO 2009099173 A1 WO2009099173 A1 WO 2009099173A1 JP 2009052035 W JP2009052035 W JP 2009052035W WO 2009099173 A1 WO2009099173 A1 WO 2009099173A1
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- WO
- WIPO (PCT)
- Prior art keywords
- orientation
- case
- injection
- fiber filler
- inhibiting
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0047—Housings or packaging of magnetic sensors ; Holders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
Definitions
- the present invention relates to an injection molded product formed by injection molding of a resin material and a magnetic sensor for detecting magnetism such as a magnetic pattern printed on a banknote.
- a magnetic sensor includes a long case, a plurality of magnetoresistive elements (hereinafter referred to as MR elements), and a magnet (see, for example, Patent Documents 1 and 2).
- the case is provided with an opening for accommodating a magnet, the bottom plate faces the banknote, and is arranged so that the longitudinal direction of the case is perpendicular to the conveyance direction of the banknote.
- the plurality of MR elements are arranged on the bottom plate of the case, and each senses a change in the surrounding magnetic field (magnetic flux density).
- a magnet is arrange
- the bottom plate shrinks more because of the large amount of resin material present on the bottom surface. In some cases, the entire case may warp in an arch shape. For this reason, in the case of a magnetic sensor having a sensing surface on the bottom plate side, there is a problem in that the sensing surface is curved in a reverse arch shape so that the sensing surface is concave, and the detection sensitivity is lowered without the uniform gap with the object to be detected. there were.
- the present invention solves the above-mentioned problems, eliminates the difference in the amount of molding shrinkage for each part, provides an injection-molded product that is injection-molded while suppressing warpage, and senses by suppressing warping of the case. It is an object of the present invention to provide a magnetic sensor capable of uniforming the gap between the surface and the object to be detected and suppressing the decrease in detection sensitivity.
- the injection molded product of the present invention is a case having a bottom surface portion and a side surface portion formed by injection molding a resin material in which a plurality of long fiber fillers are dispersed, and the side surface portion has a long fiber filler at the time of injection molding.
- An alignment inhibiting portion that partially disturbs the alignment direction is formed.
- injection molded products include case shapes and U-shaped cross sections.
- the deformation of the injection molded product having such a configuration can be adjusted by controlling the orientation of the long fiber filler. For example, even in the case of an injection molded product with a structure in which the resin material warps concavely on the bottom surface side unless the orientation of the long fiber filler is controlled, such as a case-like injection molded product, the orientation of the long fiber filler is The warpage can be reduced by optimal control.
- the inventors of the present invention are not only warped in the case-like injection-molded product, but are not only shrinkage factors based on the outer shape (for example, the portion with more resin material has a larger amount of molding shrinkage, and warpage occurs due to the difference in molding shrinkage).
- the inventors have thought that this may be caused by an orientation factor caused by the degree of flow orientation of the long fiber filler dispersed in the resin, leading to the creation of the present invention.
- the bottom surface portion of the injection-molded product is caused by the difference in shrinkage between the opening and the bottom surface due to resin curing during injection molding. It has been known that it contracts toward the center in the longitudinal direction and is concave with respect to the bottom surface, that is, warps in an inverted arch shape when viewed as a whole case.
- the inventors of the present application use a resin in which a long fiber filler is dispersed, and provide an orientation-inhibiting portion that disturbs the orientation of the long fiber filler on the side surface portion of the case-like injection molded product.
- the bottom surface portion of the injection-molded product is convex, that is, warps in the direction of an arch when viewed as a whole case, and it is possible to cancel the reverse arch-shaped warp and the arch-shaped warp. I found out.
- the molding shrinkage amount at the bottom surface portion tends to increase. Since the warpage of the injection-molded product can be suppressed by balancing with the molding shrinkage of the part, the present invention is effective.
- the orientation-inhibiting part When the orientation-inhibiting part is configured to be partially depressed or raised in a direction perpendicular to the average orientation direction of the long fiber filler, the orientation direction of the long fiber filler is changed from the average orientation direction during injection molding. It becomes easy to disturb.
- the equivalent plate thickness of the bottom surface portion is reduced, so that the shrinkage factor can be further reduced.
- the amount of molding shrinkage can be further suppressed.
- the magnetic sensor of the present invention includes a case, a plurality of magnetoresistive elements, and a magnet.
- the case is the above-described injection molded product.
- the plurality of magnetoresistive elements are arranged on the surface of the bottom surface of the case opposite to the opening, and each senses a change in the surrounding magnetic field.
- the magnet is housed inside the opening of the case and applies a magnetic field around the plurality of magnetoresistive elements.
- the gap between the sensing surface and the object to be detected can be made uniform, and a decrease in detection sensitivity can be suppressed.
- the orientation inhibition portion is formed on the side surface portion, the orientation of the long fiber filler is disturbed by the orientation inhibition portion, and the molding shrinkage amount of the side surface portion around it is increased, thereby The warp of the injection molded product can be suppressed by eliminating the difference in the amount of molding shrinkage.
- the gap between the sensing surface and the object to be detected can be made uniform, and a decrease in detection sensitivity can be suppressed.
- FIG. 1 is a perspective view of a case 1 which is an injection-molded product.
- FIG. 1 (A) is an overall perspective view
- FIG. 1 (B) is a partial cross-sectional perspective view.
- the case 1 includes a bottom plate 2 as a bottom portion, a right side plate 3 and a left side plate 4 as side portions, a back plate 5 and a front plate 6, and the space between the front plate 6 and the back plate 5 is between.
- the shape is long and the top surface of the bottom plate 2 is open. Since the openings are formed in this way, the bottom plate 2 is easily contracted by the contraction factor of the resin material when the injection molding is cured.
- the case 1 is an injection-molded product obtained by injection-molding a resin material in which long fiber fillers 9 are dispersed, and is molded by injecting a resin material from the front plate 6 side shown on the left front side in the figure. . Therefore, in the bottom plate 2, the right side plate 3, and the left side plate 4, the flow orientation of the resin material is substantially the longitudinal direction of the case 1, and the fiber orientation of the long fiber filler 9 is also substantially the longitudinal direction of the case 1.
- Each orientation-inhibiting portion 8 ⁇ / b> A is a lateral groove having a rectangular cross-section in the plate thickness direction that is recessed vertically from the upper surface of the case, and is arranged in the longitudinal direction of the case 1. Since the orientation-inhibiting part 8 is formed so as to disturb the flow orientation of the resin material and the long fiber filler during injection molding, the flow direction of the resin material and the long fiber filler is disturbed, and the long fibers around the orientation inhibiting part 8A. The fiber orientation of the filler 9 is disturbed from the longitudinal direction of the case 1.
- the fiber orientation of the long fiber filler 9 is the longitudinal direction of the case 1 on the bottom plate 2 side.
- the case 1 has a strength distribution inside the molded product, and the right side plate 3 and the left side plate 4 are more easily contracted than the bottom plate 2 due to the orientation factor.
- a resin material in the present invention for example, PPS (polyphenylene sulfide), PBT (polybutylene terephthalate), PES (polyether sulfone), and the like can be used, but the resin material is not limited thereto.
- the long fiber filler contained in the resin material is not particularly limited as long as the aspect ratio is greater than 1.
- the “average orientation direction of the long fiber filler” in the present invention is an average of the orientation directions of the oriented long fiber fillers contained in the resin material. The direction is substantially the same as the injection direction.
- FIG. 2 is a partial perspective view of the periphery of the left side plate 4 for explaining another configuration example of the orientation-inhibiting portion.
- Alignment inhibiting portions 8B and 8C are formed on the upper surface of the left side plate 4 shown in FIG.
- the orientation-inhibiting portion 8B is a groove having a triangular cross-sectional shape in the plate thickness direction and extending in the plate thickness direction.
- the orientation-inhibiting portion 8C is a cubic chip provided on the inner side of the opening of the case and on the upper surface side of the opening. Since the orientation-inhibiting portions 8B and 8C having such a shape are formed perpendicular to the injection direction, the fiber orientation of the long fiber filler is disturbed from the longitudinal direction of the case.
- Alignment inhibiting portions 8D and 8E are formed on the upper surface of the left side plate 4 shown in FIG.
- the orientation-inhibiting portion 8D is a slanted groove extending obliquely from the plate thickness direction and having a rectangular cross-sectional shape in the plate thickness direction.
- the alignment inhibition portion 8E is a lattice groove in which two oblique grooves are combined. Since the orientation-inhibiting portions 8D and 8E having such shapes are formed perpendicular to the injection direction, the fiber orientation of the long fiber filler is disturbed from the longitudinal direction of the case around the periphery.
- Alignment inhibiting portions 8F, 8G, and 8H are formed on the upper surface of the left side plate 4 shown in FIG.
- the orientation-inhibiting portion 8F is a bottomed hole having a circular cross-sectional shape on the upper surface.
- the orientation inhibiting portion 8G is a bottomed hole having a rectangular cross-sectional shape on the upper surface.
- the alignment inhibition part 8H is a semi-cylindrical chip provided on the inner side of the opening of the case and on the upper surface side of the opening. Since the orientation-inhibiting portions 8F, 8G, and 8H having such a shape are formed perpendicular to the injection direction, the fiber orientation of the long fiber filler is disturbed from the longitudinal direction of the case around the periphery.
- the left side plate 4 shown in FIG. 4D is formed with an alignment inhibition portion 8I penetrating in the thickness direction.
- the orientation inhibiting part 8I has an oblong hole shape. Since the orientation-inhibiting portion 8I having such a shape is formed perpendicular to the injection direction, the fiber orientation of the long fiber filler is disturbed from the longitudinal direction of the case around the periphery.
- FIG. 3 is a partial perspective view of the periphery of the left side plate 4 for explaining another configuration example of the orientation-inhibiting portion.
- Alignment inhibiting portions 8K, 8L, and 8M are formed on the opening side of the left side face plate 4 shown in FIG.
- the orientation-inhibiting portion 8K is a rib having a triangular cross section provided from the bottom plate to the vicinity of the center of the left side plate 4.
- the orientation inhibiting portion 8L is a rib having a rectangular cross section provided from the bottom plate to the vicinity of the center of the left side plate 4.
- the orientation-inhibiting part 8M is a trapezoidal rib provided from the bottom plate to the vicinity of the top surface of the left side plate 4. Since the long fiber filler tends to flow into the orientation-inhibiting portions 8K, 8L, and 8M having such a shape, the fiber orientation of the long fiber filler is disturbed from the longitudinal direction of the case.
- Alignment inhibiting portions 8N, 8O, 8P, and 8Q are formed on the upper surface of the left side plate 4 shown in FIG.
- the orientation-inhibiting portion 8N is a triangular pillar-shaped boss having a triangular cross-sectional shape in the longitudinal direction.
- the orientation-inhibiting part 80 is a triangular columnar boss whose cross-sectional shape in the plate thickness direction is triangular.
- the orientation inhibiting part 8P is a rectangular parallelepiped boss.
- the orientation-inhibiting portion 8Q is a rectangular parallelepiped boss whose width in the plate thickness direction is equal to the plate thickness. Since the long fiber filler tends to flow into the orientation-inhibiting portions 8N, 8O, 8P, and 8Q having such a shape, the fiber orientation of the long fiber filler is disturbed from the longitudinal direction of the case.
- orientation inhibition portions 8R, 8S, and 8T are formed in the left side plate 4 shown in FIG. 5H.
- the orientation-inhibiting portion 8R is a rib with a semicircular cross section provided from the bottom plate to the vicinity of the center of the left side plate 4.
- the alignment inhibition portion 8S is a rib having a semicircular cross section provided from the bottom plate to the vicinity of the top surface of the left side plate 4.
- the orientation-inhibiting portion 8T is a rib having a circular cross section provided from the bottom plate to the vicinity of the top surface of the left side plate 4 and connected to the left side plate 4 by a column having a rectangular cross section. Since the long fiber filler tends to flow into the orientation-inhibiting portions 8R, 8S, and 8T having such a shape, the fiber orientation of the long fiber filler is disturbed from the longitudinal direction of the case.
- Alignment inhibiting portions 8U, 8V, and 8W are formed on the upper surface of the left side plate 4 shown in FIG.
- the orientation-inhibiting part 8U is a cylindrical boss that rises vertically from the upper surface.
- the orientation-inhibiting portion 8V is a long cylindrical boss that rises vertically from the upper surface.
- the orientation-inhibiting portion 8W is a circular tubular boss that rises vertically from the upper surface. Since the long fiber filler tends to flow into the orientation-inhibiting portions 8U, 8V, 8W having such a shape, the fiber orientation of the long fiber filler is disturbed from the longitudinal direction of the case.
- the fiber orientation of the long fiber filler around the formation position can be disturbed by the orientation-inhibiting portions of various shapes. For this reason, it is oriented to a side plate of a case having a molding shrinkage due to a shrinkage factor smaller than other parts, for example, a side plate of a case-like injection molded product having an opening on one side, particularly a case having a thick bottom plate.
- the inhibition part the mold shrinkage due to the orientation factor is made larger than that of other parts, so that the balance of the mold shrinkage for each part can be balanced.
- the orientation factor can be disturbed in a more balanced manner, and the molding shrinkage can be efficiently balanced for each part by the orientation factor. .
- FIG. 4 is a side view of the main part of the bill recognition device using the magnetic sensor 100.
- the banknote identification device includes a banknote guide plate 102 and a magnetic sensor 100.
- the magnetic sensor 100 and the bill guide plate 102 are disposed so as to face each other, and the bill 101 is passed between the bill guide plate 102 and the magnetic sensor 100.
- the conveyance direction of the banknote 101 is perpendicular to the drawing, and the magnetic sensor 100 is long in the direction perpendicular to the conveyance direction of the banknote 101.
- the banknote may be transported with some skew, and the longitudinal direction of the magnetic sensor 100 is not always in a direction that is strictly orthogonal to the transport direction of the banknote 101.
- FIG. 5 is an enlarged view of a part of the magnetic sensor 100.
- A) is a front view
- B) is a front sectional view
- C) is a bottom view
- D) is a top view
- E) is a side view
- F) Is a side sectional view.
- the magnetic sensor 100 includes a case 10, a plurality of MR elements 20, a long magnet 30, a mold resin 40, and a plurality of terminal pins 50. Although not shown here, it is preferable to provide a metal cover that transmits a magnetic field, such as aluminum, on the lower surface of the case 10 and connect the metal cover to the mounting substrate with ground.
- the magnetoresistive element of the present invention is not limited to the MR element, and a Hall element may be used.
- the plurality of MR elements 20 are each of a four-terminal type and have a rectangular parallelepiped shape, and the longitudinal direction of the magnetic sensor 100 is the longitudinal direction.
- the long magnet 30 has a rectangular parallelepiped shape, and the longitudinal direction of the magnetic sensor 100 is the longitudinal direction thereof.
- the mold resin 40 seals the long magnet 30 in the opening of the case 10.
- Each of the plurality of terminal pins 50 is connected to one of four terminals of one of the MR elements 20 via a connection wiring at the base end side, and the tip end side protrudes from the upper surface of the case 10.
- FIG. 6 is an enlarged view of a part of the case 10.
- A) is a front view
- B) is a front sectional view
- C) is a bottom view
- D) is a top view
- E) is a side view
- F) Is a side sectional view.
- the case 10 is an injection-molded product obtained by injection-molding a resin material in which a long fiber filler is dispersed, and the resin material is injected into the mold from the front plate side shown on the left side in FIGS. Are molded. Therefore, in the bottom plate, the right side plate, and the left side plate, the flow orientation of the resin material is substantially the longitudinal direction of the case 10, and the fiber orientation of the long fiber filler is also substantially the longitudinal direction of the case 10.
- the bottom plate of the case 10 corresponds to the bottom portion
- the side plate of the case 10 corresponds to the side portion.
- the element accommodating portion 12 is a space formed on the lower surface of the case 10 that accommodates the plurality of MR elements 20.
- the magnet housing portion 13 is an open space formed on the upper surface of the case 10 that houses the long magnet 30 and the mold resin 40.
- the plurality of pin through holes 15 are holes through which the terminal pins 50 pass.
- the plurality of lightening holes 16 are bottomed holes for lightening formed on the lower surface of the case 10.
- the plurality of lightening grooves 17 are grooves for lightening formed on the right side surface and the left side surface of the case 10.
- the plurality of orientation-inhibiting portions 14A are grooves that are provided on the upper surface of the left side plate and the right side plate, have a rectangular cross-sectional shape in the plate thickness direction, and extend in the plate thickness direction.
- the orientation-inhibiting portion 14B is a cubic chip provided on the inner side of the opening of the case and on the upper surface side of the opening. Since the orientation-inhibiting portions 14A and 14B having such a shape are arranged along the longitudinal direction of the case 10 and are provided so as to be vertically depressed from the upper surface, the fiber orientation of the long fiber filler is around the case. Disturbed from the longitudinal direction.
- the plurality of alignment inhibition portions 14A and the alignment inhibition portions 14B are formed perpendicular to the thickness direction of the side plate, they are equivalent in the thickness direction of the side plate at the peripheral portion to which each is provided. There is almost no action to suppress wall thickness.
- the thinning groove 17 has an effect of suppressing an equivalent thickness of the side plate.
- the fiber orientation of the long fiber filler is almost not disturbed from the longitudinal direction of the case, and the long fiber filler Are oriented along the longitudinal direction.
- the element accommodating portion 12 and the plurality of lightening holes 16 have an effect of suppressing an equivalent thickness of the bottom plate. These have a shape that is partially depressed along the longitudinal direction of the case 10, and the fiber orientation of the long fiber filler is disturbed from the longitudinal direction of the case around the bottom plate to which each is attached. .
- the thickness of the side plate is suppressed by the hollowing groove 17 and the fiber orientation is disturbed by the orientation-inhibiting portions 14A and 14B, and the thickness of the bottom plate is increased by the element housing portion 12 and the hollowing hole 16. It is suppressed and the fiber orientation is disturbed. Therefore, the amount of molding shrinkage based on the shrinkage factor and orientation factor on the side plate and the amount of molding shrinkage on the bottom plate based on the shrinkage factor and orientation factor are balanced, and the warp of the case 10 is reduced.
- Case C1 No cutout hole No cutout groove No orientation hindering case C2: With cutout hole No cutout alignment
- case C3 With cutout hole With cutout groove With horizontal blockage (through) 17 x 2 rows, depth 0.5mm 1.6mm width
- the bottom plate warped concavely with respect to the bottom surface, and the amount of warpage at the maximum deformation position was 1.13 mm.
- the bottom plate warped concavely with respect to the bottom surface, and the amount of warpage at the maximum deformation position was 0.55 mm.
- the bottom plate warped convexly with respect to the bottom surface, and the amount of warpage at the maximum deformation position was 0.40 mm. Therefore, it was confirmed that the bias in the direction in which the bottom plate warps convexly with respect to the bottom surface is applied by the alignment inhibition portion.
- Case C3 Above Case C4: With a hollow hole With a hollow groove With an orientation blocking part Horizontal groove shape (through) 17 x 2 rows, depth 1.0mm 1.6mm width
- Case C4 With a hollow hole With a hollow groove With an orientation blocking part Horizontal groove shape (through) 17 x 2 rows, depth 1.0mm 1.6mm width
- case C3 the bottom plate warped convexly with respect to the bottom surface, and the amount of warpage at the maximum deformation position was 0.40 mm.
- case C4 the bottom plate warped convexly with respect to the bottom surface, and the amount of warpage at the maximum deformation position was 1.1 mm. Therefore, it has been confirmed that the bias in a direction that warps convexly with respect to the bottom plate is increased as the depth of the orientation-inhibiting portion is deeper, and the bias is decreased as the depth is shallower.
- Case C4 Above Case C5: With a hollow hole With a hollow groove With an orientation blocking part Horizontal groove shape (through) 9 x 2 rows, depth 1.0mm 1.6mm width
- Case C6 With a hollow hole With a hollow hole With an orientation blocking part Horizontal groove shape (through) 5 x 2 rows, depth 1.0mm 1.6mm width
- case C4 the bottom plate warped convexly with respect to the bottom surface, and the amount of warpage at the maximum deformation position was 1.1 mm.
- Case C4 Above Case C7: With a hollow hole With a hollow groove With an alignment hindrance Chip shape (non-penetrating) 9 x 2 rows, depth 1.0mm 1.6mm width
- case C4 the bottom plate warped convexly with respect to the bottom surface, and the amount of warpage at the maximum deformation position was 1.1 mm.
- case C7 the bottom plate warped convexly with respect to the bottom surface, and the amount of warpage at the maximum deformation position was 0.05 mm. Therefore, it was confirmed that the bias in the direction in which the bottom plate warps convexly with respect to the bottom surface is increased if the shape is a through shape, and the bias is weakened if the shape is a non-through shape.
- the orientation-inhibiting portion of the present invention applies a bias in the direction in which the bottom plate warps convexly with respect to the bottom surface, and the degree can be adjusted by the number, shape, depth, etc. of the orientation-inhibiting portions. It was.
- the case where the alignment hindering part was provided the case where the alignment hindering part was not provided, and the case where the alignment hindering part and the lightening hole were not provided were compared.
- the case has a total of 36 hollow holes, the case has a total of 34 alignment inhibition portions (16 alignment inhibition portions 14A and 18 alignment inhibition portions 14B), and the depth of the alignment inhibition portion is 1. It was set to 0 mm.
- Fig. 7 shows the measured values of the amount of warping of the case.
- a broken line in the figure is a case having an alignment inhibiting part
- a one-dot chain line in the figure is a case without an alignment inhibiting part
- a two-dot chain line in the figure is a case without a hollow hole and an orientation inhibiting part.
- the bottom plate warped convexly with respect to the bottom when both cases were held horizontally, but the amount of warpage at the maximum deformation position was about 0.05 mm when there was an orientation hindrance, It was about 0.13 mm when there was no orientation hindering part, and about 0.20 mm when there was no hollow hole and no orientation hindering part. Therefore, it was confirmed that the amount of warpage can be reduced by the presence or absence of the alignment inhibition portion.
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Abstract
Description
2…底面板(底面部)
3…右側面板(側面部)
4…左側面板(側面部)
5…背面板
6…正面板
8A~8W…配向阻害部
9…長繊維フィラー
10…ケース
12…素子収容部
13…磁石収容部
14A,14B…配向阻害部
15…ピン貫通孔
16…肉抜穴
17…肉抜溝
20…磁気抵抗素子
30…長尺型磁石
40…モールド樹脂
50…端子ピン
100…磁気センサ
101…紙幣
102…紙幣ガイド板
全幅:15.7mm
全高:7.35mm
まず、配向阻害部の有無について検討した。
シミュレーションにて、肉抜穴と肉抜溝と配向阻害部との無いケースC1、肉抜穴と肉抜溝と有し配向阻害部の無いケースC2、肉抜穴と肉抜溝と配向阻害部とを有するケースC3とを比較した。
各ケースは以下の設定とした。
ケースC1:肉抜穴無し
肉抜溝無し
配向阻害部無し
ケースC2:肉抜穴有り
肉抜溝有り
配向阻害部無し
ケースC3:肉抜穴有り
肉抜溝有り
配向阻害部有り 横溝形状(貫通)
17個×2列
深さ0.5mm
幅1.6mm
シミュレーションの結果、ケースC1は、底面板が底面に対して凹に反り、その最大変形位置の反り量は1.13mmであった。ケースC2は、底面板が底面に対して凹に反り、その最大変形位置の反り量は0.55mmであった。ケースC3は、逆に底面板が底面に対して凸に反り、その最大変形位置の反り量は0.40mmであった。したがって、配向阻害部によって、底面板が底面に対して凸に反る方向のバイアスがかかることが確認された。
各ケースは以下の設定とした。
ケースC3:上記
ケースC4:肉抜穴有り
肉抜溝有り
配向阻害部有り 横溝形状(貫通)
17個×2列
深さ1.0mm
幅1.6mm
シミュレーションの結果、ケースC3は、底面板が底面に対して凸に反り、その最大変形位置の反り量は0.40mmであった。ケースC4は、底面板が底面に対して凸に反り、その最大変形位置の反り量は1.1mmであった。したがって、配向阻害部の深さによって、特にその深さが深いほど底面板に対して凸に反る方向のバイアスが強まり、浅いほどバイアスが弱まることが確認された。
各ケースは以下の設定とした。
ケースC4:上記
ケースC5:肉抜穴有り
肉抜溝有り
配向阻害部有り 横溝形状(貫通)
9個×2列
深さ1.0mm
幅1.6mm
ケースC6:肉抜穴有り
肉抜溝有り
配向阻害部有り 横溝形状(貫通)
5個×2列
深さ1.0mm
幅1.6mm
シミュレーションの結果、ケースC4は、底面板が底面に対して凸に反り、その最大変形位置の反り量は1.1mmであった。ケースC5は、底面板が底面に対して凸に反り、その最大変形位置の反り量は0.6mmであった。ケースC6は、底面板が底面に対して凸に反り、その最大変形位置の反り量は0.5mmであった。したがって、配向阻害部の数によって、特にその数が多いほど底面板に対して凸に反る方向のバイアスが強まり、少ないほどバイアスが弱まることが確認された。
各ケースは以下の設定とした。
ケースC4:上記
ケースC7:肉抜穴有り
肉抜溝有り
配向阻害部有り 欠け形状(非貫通)
9個×2列
深さ1.0mm
幅1.6mm
シミュレーションの結果、ケースC4は、底面板が底面に対して凸に反り、その最大変形位置の反り量は1.1mmであった。ケースC7は、底面板が底面に対して凸に反り、その最大変形位置の反り量は0.05mmであった。したがって、配向阻害部の形状によって、特にその形状が貫通形状であれば底面板が底面に対して凸に反る方向のバイアスが強まり、非貫通形状であればバイアスが弱まることが確認された。
Claims (6)
- 長繊維フィラーを分散した樹脂材を射出成形してなり、底面部と側面部とを有するケース状の射出成形品であって、
前記側面部に、射出成形時に長繊維フィラーの配向方向を部分的に乱す配向阻害部を形成した射出成形品。 - 前記側面部の板厚が前記底面部の板厚よりも薄い請求項1に記載の射出成形品。
- 前記配向阻害部は、前記長繊維フィラーの平均の配向方向に対して垂直方向に部分的に陥没した形状である、請求項1または2に記載の射出成形品。
- 前記配向阻害部は、前記長繊維フィラーの平均の配向方向に対して垂直方向に部分的に隆起した形状である、請求項1または2に記載の射出成形品。
- 前記底面部に、前記長繊維フィラーの平均の配向方向に対して垂直方向に陥没または隆起した肉抜き部を形成した請求項1~4のいずれかに記載の射出成形品。
- 請求項1~5のいずれかに記載の射出成形品からなるケースと、
前記底面部に付設され、それぞれ周囲の磁界の変化を感知する複数の磁電変換素子と、
前記ケースの開口内部に収納され、前記複数の磁気抵抗素子の周囲に磁界を印加する磁石と、
を備える磁気センサ。
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JP2009552531A JP5152205B2 (ja) | 2008-02-06 | 2009-02-06 | 射出成形品および磁気センサ |
KR1020107017264A KR101368696B1 (ko) | 2008-02-06 | 2009-02-06 | 사출 성형품 및 자기 센서 |
EP09707840A EP2253446A4 (en) | 2008-02-06 | 2009-02-06 | SPLASHED ARTICLE AND MAGNETIC SENSOR |
CN200980104522.3A CN101939150B (zh) | 2008-02-06 | 2009-02-06 | 注塑成形件以及磁传感器 |
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JP (1) | JP5152205B2 (ja) |
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Cited By (6)
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JP2015205445A (ja) * | 2014-04-21 | 2015-11-19 | 株式会社セキソー | 樹脂成形品 |
WO2016013438A1 (ja) * | 2014-07-25 | 2016-01-28 | 三菱電機株式会社 | 磁気センサ装置およびその製造方法 |
CN108189418A (zh) * | 2017-12-28 | 2018-06-22 | 上海宝钢磁业有限公司 | 结合塑料注射成型的锰锌铁氧体磁芯成型新工艺 |
WO2019017219A1 (ja) * | 2017-07-19 | 2019-01-24 | 三菱電機株式会社 | 磁気センサ装置 |
JP2019198965A (ja) * | 2018-05-14 | 2019-11-21 | 株式会社豊田中央研究所 | 繊維強化樹脂構造部材 |
JP2019211382A (ja) * | 2018-06-07 | 2019-12-12 | Tdk株式会社 | 磁気センサ |
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WO2016174497A1 (en) * | 2015-04-27 | 2016-11-03 | Synaptive Medical (Barbados) Inc. | System and method for image warp correction for magnetic resonance imaging |
US10630010B2 (en) | 2018-01-10 | 2020-04-21 | Te Connectivity Corporation | Stacked dual connector system |
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Cited By (13)
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JP2015205445A (ja) * | 2014-04-21 | 2015-11-19 | 株式会社セキソー | 樹脂成形品 |
WO2016013438A1 (ja) * | 2014-07-25 | 2016-01-28 | 三菱電機株式会社 | 磁気センサ装置およびその製造方法 |
JP5881925B1 (ja) * | 2014-07-25 | 2016-03-09 | 三菱電機株式会社 | 磁気センサ装置およびその製造方法 |
CN106716163A (zh) * | 2014-07-25 | 2017-05-24 | 三菱电机株式会社 | 磁性传感器装置及其制造方法 |
CN106716163B (zh) * | 2014-07-25 | 2019-08-16 | 三菱电机株式会社 | 磁性传感器装置及其制造方法 |
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WO2019017219A1 (ja) * | 2017-07-19 | 2019-01-24 | 三菱電機株式会社 | 磁気センサ装置 |
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CN108189418A (zh) * | 2017-12-28 | 2018-06-22 | 上海宝钢磁业有限公司 | 结合塑料注射成型的锰锌铁氧体磁芯成型新工艺 |
JP2019198965A (ja) * | 2018-05-14 | 2019-11-21 | 株式会社豊田中央研究所 | 繊維強化樹脂構造部材 |
JP7070065B2 (ja) | 2018-05-14 | 2022-05-18 | 株式会社豊田中央研究所 | 繊維強化樹脂構造部材 |
JP2019211382A (ja) * | 2018-06-07 | 2019-12-12 | Tdk株式会社 | 磁気センサ |
JP7047610B2 (ja) | 2018-06-07 | 2022-04-05 | Tdk株式会社 | 磁気センサ |
Also Published As
Publication number | Publication date |
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KR20100109944A (ko) | 2010-10-11 |
EP2253446A1 (en) | 2010-11-24 |
CN101939150B (zh) | 2014-05-28 |
KR101368696B1 (ko) | 2014-03-03 |
EP2253446A4 (en) | 2011-10-19 |
JP5152205B2 (ja) | 2013-02-27 |
JPWO2009099173A1 (ja) | 2011-05-26 |
CN101939150A (zh) | 2011-01-05 |
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