JPS6153936B2 - - Google Patents
Info
- Publication number
- JPS6153936B2 JPS6153936B2 JP3128882A JP3128882A JPS6153936B2 JP S6153936 B2 JPS6153936 B2 JP S6153936B2 JP 3128882 A JP3128882 A JP 3128882A JP 3128882 A JP3128882 A JP 3128882A JP S6153936 B2 JPS6153936 B2 JP S6153936B2
- Authority
- JP
- Japan
- Prior art keywords
- thin plate
- synthetic resin
- resin material
- pin
- injected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 33
- 229920003002 synthetic resin Polymers 0.000 claims description 32
- 239000000057 synthetic resin Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
Classifications
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1671—Making multilayered or multicoloured articles with an insert
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明はインサート成形法に関するものであ
り、その目的とするところは、放熱性や耐熱性等
の向上のためにインサートする薄板を変形させる
ことなく所定の位置に埋設することのできるイン
サート成形法を提供することにある。[Detailed description of the invention] The present invention relates to an insert molding method, and its purpose is to embed a thin plate to be inserted in a predetermined position without deforming it in order to improve heat dissipation, heat resistance, etc. The purpose of the present invention is to provide an insert molding method that can be used for insert molding.
電気かみそりのような小物家電商品は、小型、
薄型化のために制御回路や充電回路等の電子回路
やモータ等を高密度で実装しているが、電子回路
やモータ等の内部発熱により合成樹脂材でできた
ハウジング内の温度が高くなり、放熱性が低いと
個々の電子部品の信頼性が低下するとともに、手
でふれるハウジングの表面温度が部分的に高くな
り使用者に不安感を与えたり、ハウジングが変形
したり、変色するという問題が生じた。 Small household appliances such as electric razors are small,
Electronic circuits such as control circuits and charging circuits, motors, etc. are mounted with high density in order to make the product thinner, but internal heat generation from the electronic circuits, motors, etc. increases the temperature inside the housing made of synthetic resin. Poor heat dissipation reduces the reliability of individual electronic components, and also causes problems such as the surface temperature of the housing that is touched by hands becoming high in some areas, giving the user a sense of anxiety, and causing the housing to deform or discolor. occured.
このような問題を解決する方法として、第８図
に示すように２分割のハウジングアの内面にアル
ミニウムのような熱伝導材よりなる薄板イを載置
して放熱効果を高めるとともに、薄板イと導電部
（図示せず）との間にプレスボードのような絶縁
板ウを挾み込む方法があるが、ハウジングアの内
面にはモータ（図示せず）、電池（図示せず）、充
電部を固定するためのリブエが突出しており、薄
板イや絶縁板ウにはこれらのリブエを避けるため
の切欠オを設ける必要があり、放熱面積が小さく
なつて熱の放散が悪くなるという問題があり、更
には、ハウジングアの内面に薄板イや絶縁板ウを
取着するには接着剤を用いて貼着するが、形状の
複雑な薄板イや絶縁板ウを全面に亘つて完全に貼
着することは困難であり、放熱にばらつきが生じ
るという問題があつた。 As a way to solve this problem, as shown in Figure 8, a thin plate made of a thermally conductive material such as aluminum is placed on the inner surface of the two-part housing to increase the heat dissipation effect. There is a method of inserting an insulating board such as pressboard between the conductive part (not shown), but the inner surface of the housing has a motor (not shown), a battery (not shown), and a charging part. There are protruding ribs for fixing the parts, and it is necessary to provide cutouts in the thin plate A and insulating board C to avoid these ribs, which causes the problem that the heat dissipation area becomes smaller and the heat dissipation becomes worse. Furthermore, adhesive is used to attach the thin plate A and the insulating plate C to the inner surface of the housing, but it is difficult to completely adhere the thin plate A and the insulating plate C, which have complex shapes, over the entire surface. It was difficult to do so, and there was a problem that heat dissipation varied.
本発明は上述の問題点に鑑みてなされたもので
あり、以下本発明の実施例を示す図面を参照して
説明する。第１図及び第２図において、ハウジン
グ１は２分割に形成されており、該ハウジング１
の内部にはモータ２、電池３、及び充電部４が収
容されており、該モータ２により駆動される内刃
５に摺接する外刃６が着脱自在に設けられてい
る。ハウジング１には複数の小孔７を有するアル
ミニウムのような熱伝導材よりなる薄板８がモー
タ２や電池３や充電部４の収納位置の略全体に埋
設されている。ハウジング１は内面層を形成する
電気絶縁性を有した第１の合成樹脂材１ａと、薄
板８と、外面層を形成する第２の合成樹脂材１ｂ
とで３層構造に形成されている。充電部４はプリ
ント配線板９と該プリント配線板９に実装される
電子部品１０とで構成されており、ハウジング１
の内壁で支持されている。スイツチハンドル１１
は一方のハウジング１に摺動自在に配設されてお
り、該スイツチハンドル１１を操作することによ
り、モータ２に電池３からの電気を供給してモー
タ２を回転駆動させるのである。 The present invention has been made in view of the above-mentioned problems, and will be described below with reference to the drawings showing embodiments of the present invention. In FIGS. 1 and 2, the housing 1 is formed into two parts.
A motor 2, a battery 3, and a charging section 4 are housed inside, and an outer cutter 6 that slides in contact with an inner cutter 5 driven by the motor 2 is detachably provided. In the housing 1, a thin plate 8 made of a thermally conductive material such as aluminum and having a plurality of small holes 7 is embedded in substantially the entire housing position of the motor 2, battery 3, and charging section 4. The housing 1 includes a first synthetic resin material 1a having electrical insulation properties forming an inner surface layer, a thin plate 8, and a second synthetic resin material 1b forming an outer surface layer.
It is formed into a three-layer structure. The charging section 4 is composed of a printed wiring board 9 and an electronic component 10 mounted on the printed wiring board 9.
supported by the inner wall of switch handle 11
is slidably disposed in one housing 1, and by operating the switch handle 11, electricity from the battery 3 is supplied to the motor 2 to rotate the motor 2.
以下、ハウジング１の製造方法について第３図
乃至第７図に基づいて述べる。第４図において、
キヤビテイ１２は可動金型１３と、固定金型１４
とで構成されている。。可動金型１３にはキヤビ
テイ１２内に突出自在なピン１５が複数本設けら
れている。ピン１５は突出状態で拘束することが
可能で可動金型１３内に収納されており、薄板８
に当接した位置で係止される。ピン１５の先端に
は周方向に突出する凸部１８が８カ所等間隔に設
けられており、凸部１８の底部１６を結んだ仮想
線ａの直径は小孔７の直径と同一となつている。
また、凸部１８間の凹部１７の長さl1は薄板８と
可動金型１３との距離l2と等しく形成されてい
る。固定金型１４のキヤビテイ１２面にはピン１
５と対向する位置に小孔７を配列し、かつ表面に
接着剤が塗布された薄板８が載置され、キヤビテ
イ１２内に突出されたピン１５の端面が全ての小
孔７を閉塞するとともにピン１５を拘束してピン
１５の端面と固定金型１４のキヤビテイ１２面と
の間に薄板８が保持されている。この状態でキヤ
ビテイ１２内に絶縁材でできた第１の合成樹脂材
１ａを溶融させて注入するのであるが、薄板８は
小孔７の周縁がピン１５の凸部１８で固定されて
いるので第１の合成樹脂材１ａの射出流により移
動することなく、第５図に示すように、第１の合
成樹脂材１ａで薄板８の片面がモールドされ一体
的に同時成形されるのである。このとき、ピン１
５の凹部１７が位置している小孔７の周縁は第１
の合成樹脂材１ａによりモールドされ、、第１の
合成樹脂材１ａで薄板８の小孔７の周縁が保持さ
れている。次に、型開きした後、ピン１５の端部
に硬化した第１の合成樹脂材１ａを取着したまま
で別の固定金型１９に取り替えて第６図に示す大
きな容積のキヤビテイ２０を形成し、該キヤビテ
イ２０内に第２の合成樹脂材１ｂを溶融させて注
入する。このとき、ピン１５の拘束状態を開放す
れば、樹脂圧によりピン１５は可動金型１３内に
収納されてキヤビテイ２０面とピン１５の端面と
が面一になつた状態で係止され、第２の合成樹脂
材１ｂは第７図に示すように全ての小孔７に充填
されるとともに薄板８の他面をモールドし、薄板
８は第１の合成樹脂材１ａ、及び第２の合成樹脂
材１ｂにより完全に包み込まれる。 Hereinafter, a method for manufacturing the housing 1 will be described based on FIGS. 3 to 7. In Figure 4,
The cavity 12 has a movable mold 13 and a fixed mold 14.
It is made up of. . The movable mold 13 is provided with a plurality of pins 15 that can freely protrude into the cavity 12. The pin 15 can be restrained in a protruding state and is housed in the movable mold 13.
It is locked at the position where it touches. At the tip of the pin 15, eight protrusions 18 protruding in the circumferential direction are provided at equal intervals, and the diameter of an imaginary line a connecting the bottoms 16 of the protrusions 18 is the same as the diameter of the small hole 7. There is.
Further, the length l 1 of the recessed part 17 between the convex parts 18 is formed to be equal to the distance l 2 between the thin plate 8 and the movable mold 13. There is a pin 1 on the 12th side of the cavity of the fixed mold 14.
A thin plate 8 with small holes 7 arranged in a position facing the holes 5 and coated with adhesive on the surface is placed, and the end face of the pin 15 protruding into the cavity 12 closes all the small holes 7. A thin plate 8 is held between the end surface of the pin 15 and the cavity 12 surface of the fixed mold 14 by restraining the pin 15. In this state, the first synthetic resin material 1a made of an insulating material is melted and injected into the cavity 12; As shown in FIG. 5, one side of the thin plate 8 is molded and integrally molded with the first synthetic resin material 1a without being moved by the injection flow of the first synthetic resin material 1a. At this time, pin 1
The circumference of the small hole 7 where the recess 17 of No. 5 is located is the first
The peripheral edge of the small hole 7 of the thin plate 8 is held by the first synthetic resin material 1a. Next, after opening the mold, the hardened first synthetic resin material 1a remains attached to the end of the pin 15 and is replaced with another fixed mold 19 to form a cavity 20 with a large volume as shown in FIG. Then, the second synthetic resin material 1b is melted and injected into the cavity 20. At this time, if the restraint state of the pin 15 is released, the pin 15 is housed in the movable mold 13 by the resin pressure and is locked in a state where the cavity 20 surface and the end surface of the pin 15 are flush with each other. The second synthetic resin material 1b fills all the small holes 7 and molds the other side of the thin plate 8, as shown in FIG. It is completely enveloped by the material 1b.
このようにしたものは、薄板８が第１の合成樹
脂材１ａと第２の合成樹脂材１ｂによつて完全に
包み込むことができるので第１の合成樹脂材１ａ
と第２の合成樹脂材１ｂと薄板８との機械的結合
力を大きくすることができる上に薄板８に塗布し
た接着剤による結合力によつても強固に結合され
ハウジングの強度向上をはかることができ薄肉の
ものにすることができるのであり、更に、内面層
となる第１の合成樹脂材１ａに弾力性を有する合
成樹脂材料を用いることによりハウジング１内に
収納するモータ２、電池３、及び充電部４等の緩
衝効果を持たせたり、吸音、防振材を使用するこ
とによりモータ２及び内刃５の駆動時の雑音や振
動を吸収させることもできるのである。 In this case, since the thin plate 8 can be completely wrapped by the first synthetic resin material 1a and the second synthetic resin material 1b, the first synthetic resin material 1a
The mechanical bonding force between the second synthetic resin material 1b and the thin plate 8 can be increased, and the bonding force of the adhesive applied to the thin plate 8 can also firmly bond the housing, thereby improving the strength of the housing. Furthermore, by using a synthetic resin material having elasticity for the first synthetic resin material 1a serving as the inner surface layer, the motor 2, battery 3, and It is also possible to absorb noise and vibration when the motor 2 and the inner cutter 5 are driven by providing a buffering effect to the charging part 4 and the like, and by using sound absorbing and vibration isolating materials.
以上説明したように、本発明によれば、熱伝導
材からなる薄板の片面から予め注入する第１の合
成樹脂材と該薄板の他面から注入する第２の合成
樹脂材で該薄板を埋設して成るインサート成形法
において、前記薄板に小孔を形成するとともに、
ピンの先端に周方向に突出する凸部を複数個形成
し、前記ピンの凸部で前記薄板の小孔の周縁を支
持して第１の合成樹脂材を注入し薄板の片面をモ
ールドした後、第２の合成樹脂材を注入して前記
小孔内に充填するとともに前記薄板の他面をモー
ルドしたので、ハウジング１の組立てと同時に放
熱板や耐熱板を装着することができ組込みが簡単
となり、従来のように放熱面積がリブのために小
さくなることがなくて放熱効果が大きくなるの
で、電子回路やモータ等の内部発熱によつて個々
の電子部品の信頼性が低下したりユーザーに不安
感を与えることがないという効果があり、また、
複雑な形状の金属板や絶縁板を接着する必要がな
くて放熱効果が均一となり、製品による放熱のば
らつきがなくなるという効果があり、更に、第１
の合成樹脂材の注入時にはピンの凸部で薄板の小
孔周縁を支持しているので、第１の合成樹脂材の
注入圧力により薄板が所定の位置からずれないよ
うになるとともに、ピンの凹部に注入された第１
の合成樹脂材で薄板の小孔周縁を部分的に支持す
るようにしているので、第２の合成樹脂材の注入
圧力により薄板がピン側に変形して薄板が第１の
合成樹脂材から剥離したり、合成樹脂材の表面と
薄板との間隔が不均一になるようなことはなく放
熱効果を均一にすることができるという効果があ
る。 As explained above, according to the present invention, a thin plate made of a thermally conductive material is embedded with a first synthetic resin material injected in advance from one side of the thin plate and a second synthetic resin material injected from the other side of the thin plate. In the insert molding method, a small hole is formed in the thin plate, and
After forming a plurality of convex portions protruding in the circumferential direction at the tip of the pin, supporting the periphery of the small hole in the thin plate with the convex portion of the pin, and injecting a first synthetic resin material and molding one side of the thin plate. Since the second synthetic resin material is injected and filled into the small hole and the other surface of the thin plate is molded, the heat sink and heat resistant plate can be attached at the same time as the housing 1 is assembled, making assembly easy. , the heat dissipation area is not reduced due to the ribs as in the past, and the heat dissipation effect is increased, so internal heat generation in electronic circuits, motors, etc. reduces the reliability of individual electronic components and creates concerns for users. It has the effect of not giving any impression, and
There is no need to bond complicatedly shaped metal plates or insulating plates, and the heat dissipation effect is uniform, eliminating variations in heat dissipation depending on the product.
When the synthetic resin material is injected, the convex part of the pin supports the periphery of the small hole in the thin plate, so the injection pressure of the first synthetic resin material prevents the thin plate from shifting from the predetermined position, and the concave part of the pin The first injected into
Since the periphery of the small hole in the thin plate is partially supported by the synthetic resin material, the injection pressure of the second synthetic resin material deforms the thin plate toward the pin, causing the thin plate to separate from the first synthetic resin material. Also, the spacing between the surface of the synthetic resin material and the thin plate does not become uneven, and the heat dissipation effect can be made uniform.
第１図は本発明のインサート成形法で形成した
ハウジングを備えた電気かみそりの正面図、第２
図は同上の断面図、第３図はピンの形状を示すキ
ヤビテイの平面図、第４図、乃至第７図は第３図
のＸ−Ｘを断面してハウジングの製造方法を示す
断面図、第８図は従来例を示す分解斜視図であ
る。
１ａ……第１の合成樹脂材、１ｂ……第２の合
成樹脂材、７……小孔、８……薄板、１５……ピ
ン、１８……凸部。
FIG. 1 is a front view of an electric shaver equipped with a housing formed by the insert molding method of the present invention, and FIG.
The figure is a sectional view of the same as above, FIG. 3 is a plan view of the cavity showing the shape of the pin, FIGS. 4 to 7 are sectional views taken along line X-X in FIG. FIG. 8 is an exploded perspective view showing a conventional example. 1a...First synthetic resin material, 1b...Second synthetic resin material, 7...Small hole, 8...Thin plate, 15...Pin, 18...Convex portion.
Claims (1)
る第１の合成樹脂材と該薄板の他面から注入する
第２の合成樹脂材で該薄板を埋設して成るインサ
ート成形法において、前記薄板に小孔を形成する
とともに、ピンの先端に周方向に突出する凸部を
複数個形成し、前記ピンの凸部で前記薄板の小孔
の周縁を支持して第１の合成樹脂材を注入し薄板
の片面をモールドした後、第２の合成樹脂材を注
入して前記小孔内に充填するとともに前記薄板の
他面をモールドしたことを特徴とするインサート
成形法。1 In an insert molding method in which a thin plate made of a thermally conductive material is embedded with a first synthetic resin material injected in advance from one side of the thin plate and a second synthetic resin material injected from the other side of the thin plate, the thin plate is A small hole is formed, and a plurality of protrusions protruding in the circumferential direction are formed at the tip of the pin, and the first synthetic resin material is injected with the protrusions of the pin supporting the periphery of the small hole of the thin plate. An insert molding method characterized in that after one side of the thin plate is molded, a second synthetic resin material is injected to fill the small holes and the other side of the thin plate is molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3128882A JPS58147330A (en) | 1982-02-26 | 1982-02-26 | Insert molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3128882A JPS58147330A (en) | 1982-02-26 | 1982-02-26 | Insert molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58147330A JPS58147330A (en) | 1983-09-02 |
| JPS6153936B2 true JPS6153936B2 (en) | 1986-11-20 |
Family
ID=12327114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3128882A Granted JPS58147330A (en) | 1982-02-26 | 1982-02-26 | Insert molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58147330A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4301444C2 (en) * | 1993-01-20 | 1995-08-31 | Pelz Ernst Empe Werke | Method for producing a lining part and in particular a lining part produced according to it |
| GB0014495D0 (en) * | 2000-06-15 | 2000-08-09 | Smithkline Beecham Gmbh & Co | Process |
-
1982
- 1982-02-26 JP JP3128882A patent/JPS58147330A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58147330A (en) | 1983-09-02 |
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