JP2565301Y2 - Injection mold - Google Patents
Injection moldInfo
- Publication number
- JP2565301Y2 JP2565301Y2 JP1990094804U JP9480490U JP2565301Y2 JP 2565301 Y2 JP2565301 Y2 JP 2565301Y2 JP 1990094804 U JP1990094804 U JP 1990094804U JP 9480490 U JP9480490 U JP 9480490U JP 2565301 Y2 JP2565301 Y2 JP 2565301Y2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- metal member
- cooling water
- concave portion
- contour
- 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 - Lifetime
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、樹脂を射出成形するための射出成形金型に
係り、とくにオーディオ・カセットハーフ等の複雑な形
状の樹脂成形品を射出成形するのに適した射出成形金型
に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an injection molding die for injection molding a resin, and in particular, injection molding a resin molded product having a complicated shape such as an audio cassette half. The present invention relates to an injection mold suitable for:
（考案の概要） 本考案は、樹脂を射出成形するための射出成形金型に
おいて、成形用凹部を備えた部分を表面硬度の高い材質
で、冷却水溝を有する部分を熱伝導率の高い材質でそれ
ぞれ構成することにより、冷却効率の改善を図り、成形
サイクルに占める冷却時間を短縮可能としたものであ
る。(Summary of the Invention) The present invention relates to an injection molding die for injection molding a resin, wherein a portion having a concave portion for molding is made of a material having a high surface hardness, and a portion having a cooling water groove is made of a material having a high thermal conductivity. By improving the cooling efficiency, the cooling time in the molding cycle can be reduced.
（従来の技術） 第３図及び第４図は従来の射出成形金型を示す。この
射出成形金型は表面硬度の高いダイス鋼から成り、その
主面１に成形用凹部（キャビティ）２が形成されるとと
もに、ドリル穴加工により冷却水通路３が形成されてい
る。ここで、ドリル穴加工に伴う不必要な開口部は栓体
４で閉塞され、冷却水通路３は１個の入口3Aと出口3Bと
を有する構成となっている。なお、ここでは成形用凹部
２はオーディオ・カセットハーフを対象とした形状とな
っている。(Prior Art) FIGS. 3 and 4 show a conventional injection mold. This injection molding die is made of die steel having a high surface hardness, and has a molding concave portion (cavity) 2 formed on a main surface 1 thereof, and a cooling water passage 3 formed by drilling holes. Here, unnecessary openings due to drilling are closed with plugs 4, and the cooling water passage 3 has one inlet 3A and one outlet 3B. In this case, the molding recess 2 has a shape intended for the audio cassette half.
（考案が解決しようとする課題） ところで、第３図及び第４図に示す従来の射出成形金
型では、全体を表面硬度の高いダイス鋼で形成してお
り、ロックウェル硬度ＨRＣは50程度と大きいのである
が、熱伝導率が30kcal/mh℃と小さい嫌いがあった。ま
た、冷却水通路３はドリル穴加工により形成するため、
冷却水通路の配置の自由度が少なく、複雑な成形用凹部
２の形状に対応させることが困難な嫌いがある。(Problems to be Solved by the Invention) Meanwhile, in the conventional injection mold shown in FIGS. 3 and 4, the whole is formed of die steel having a high surface hardness, and the Rockwell hardness H R C is 50. Although it was as large as it was, the heat conductivity was as low as 30 kcal / mh ° C. Also, since the cooling water passage 3 is formed by drilling holes,
The degree of freedom in the arrangement of the cooling water passages is small, and it is difficult to adapt to the complicated shape of the molding recess 2.
このため、成形用凹部２の形状が複雑化すると射出成
形に伴う温度分布（ばらつき）も複雑化し、冷却効率を
下げることになり、成形サイクル短縮の障壁となる。For this reason, when the shape of the molding concave portion 2 becomes complicated, the temperature distribution (variation) accompanying the injection molding becomes complicated, and the cooling efficiency is reduced, which is a barrier to shortening the molding cycle.
本考案は上記の点に鑑み、成形用凹部を有する部分は
表面硬度の高い材質で構成し、冷却水溝を設ける部分は
熱伝動率の大きな材質で構成しかつ冷却水溝の配置を工
夫することにより、射出成形時の冷却効率を改善し、温
度分布を最小に抑制し、ひいては成形サイクルに占める
冷却期間の短縮を図った射出成形金型を提供することを
目的とする。In view of the above, in the present invention, the portion having the molding concave portion is made of a material having a high surface hardness, the portion where the cooling water groove is provided is made of a material having a large heat transfer coefficient, and the arrangement of the cooling water groove is devised. Accordingly, an object of the present invention is to provide an injection molding die in which the cooling efficiency during injection molding is improved, the temperature distribution is minimized, and the cooling period in the molding cycle is shortened.
（課題を解決するための手段） 上記目的を達成するために、本考案は、成形用凹部を
有する射出成形金型において、前記成形用凹部を表面硬
度の高い第１の金属部材の主面に形成し、該主面の反対
面に対接する熱伝動率の大きな第２の金属部材の対接面
の、少なくとも前記成形用凹部の輪郭に沿った部分と当
該輪郭の内側に位置する部分とに冷却水溝を形成し、前
記第１及び第２の金属部材を接合一体化した構成として
いる。(Means for Solving the Problems) In order to achieve the above object, the present invention provides an injection molding die having a molding concave portion, wherein the molding concave portion is formed on a main surface of a first metal member having a high surface hardness. And at least a portion along the contour of the forming concave portion and a portion located inside the contour of the contact surface of the second metal member having a large heat transfer coefficient that contacts the opposite surface of the main surface. A cooling water groove is formed, and the first and second metal members are joined and integrated.
（作用） 本考案の射出成形金型では、成形用凹部は表面硬度の
高い第１の金属部材の主面に形成しており、冷却水溝は
熱伝動率の大きな第２の金属部材の突き合わせ面（第１
の金属部材への対接面）の、少なくとも前記成形用凹部
の輪郭に沿った部分と当該輪郭の内側に位置する部分と
に形成している。このため、成形用凹部が形成された第
１の金属部材から冷却水溝が形成された第２の金属部材
への熱移動を積極的かつ効率的に行うことができ、また
第１の金属部材と第２の金属部材との間に位置すること
になる配置の自由度の高い冷却水溝によって複雑な成形
用凹部であっても、温度分布を最小に抑制することがで
きる。たとえば第２の金属部材としてベリリウム銅合金
（熱伝導率:80kcal/mh℃）等を採用すれば、熱伝導率が
従来一般的なダイス鋼の２倍以上となり、急速冷却が可
能となる。(Operation) In the injection molding die of the present invention, the molding recess is formed on the main surface of the first metal member having a high surface hardness, and the cooling water groove is abutted by the second metal member having a high heat transfer coefficient. Surface (first
At least at a portion along the contour of the molding concave portion and at a portion located inside the contour. Therefore, heat can be positively and efficiently transferred from the first metal member having the forming concave portion to the second metal member having the cooling water groove formed therein, and the first metal member can be efficiently and efficiently transferred. The temperature distribution can be suppressed to a minimum even in the case of a complicated forming recess due to a cooling water groove having a high degree of freedom in arrangement, which is located between the cooling water groove and the second metal member. For example, when a beryllium copper alloy (thermal conductivity: 80 kcal / mh ° C.) or the like is used as the second metal member, the thermal conductivity becomes twice or more that of the conventional general die steel, and rapid cooling becomes possible.
（実施例） 以下、本考案に係る射出成形金型の実施例を図面に従
って説明する。(Example) Hereinafter, an example of an injection mold according to the present invention will be described with reference to the drawings.
第１図及び第２図は本考案の実施例を示す。これらの
図において、ダイス鋼等の表面硬度の高い第１の金属部
材５の主面には成形用凹部２が形成されている。ここで
は従来の場合と同様オーディオ・カセットハーフを対象
とした形状となっている。この第１の金属部材５の厚み
は成形用凹部２が形成できかつ成形時の圧力に耐え得る
範囲で可能な限り薄くなる。1 and 2 show an embodiment of the present invention. In these figures, a forming recess 2 is formed on a main surface of a first metal member 5 having a high surface hardness such as die steel. Here, as in the conventional case, the shape is designed for the audio cassette half. The thickness of the first metal member 5 is as small as possible within a range in which the molding recess 2 can be formed and the pressure at the time of molding can be endured.
一方、ベリリウム銅合金等の熱伝導率の大きな第２の
金属部材６の対接面（第１の金属部材５への接合面）に
は射出成形時の温度分布が最小となるように成形用凹部
２の輪郭に沿った部分及び該輪郭の内側の温度上昇しや
すい部分に冷却水溝7,8,9を形成している。冷却水溝7,
8,9はそれぞれ入口7A,8A,9Aを有するとともに出口7B,8
B,9Bを有している。On the other hand, the contact surface (joint surface to the first metal member 5) of the second metal member 6 having a large thermal conductivity, such as beryllium copper alloy, is formed so as to minimize the temperature distribution during injection molding. Cooling water grooves 7, 8, 9 are formed in a portion along the contour of the concave portion 2 and in a portion inside the contour where the temperature tends to rise. Cooling water groove 7,
8, 9 have inlets 7A, 8A, 9A respectively and outlets 7B, 8
B, 9B.
そして、第２の金属部材６は第１の金属部材５の主面
の反対面に対し、銀ろう付等で水密に接合一体化され
る。この結果、射出成形金型内部に水密な冷却水通路が
構成されることになる。また、ベリリウム銅合金等の第
２の金属部材６の熱伝導率は80kcal/mh℃位であるた
め、従来の全体をダイス鋼で構成したものにくらべ、熱
伝導率は２倍以上となる。Then, the second metal member 6 is joined to the surface opposite to the main surface of the first metal member 5 in a water-tight manner by silver brazing or the like. As a result, a watertight cooling water passage is formed inside the injection mold. In addition, since the thermal conductivity of the second metal member 6 such as a beryllium copper alloy is about 80 kcal / mh ° C., the thermal conductivity is twice or more as compared with the conventional one made of die steel.
なお、上記実施例では成形用凹部２としてオーディオ
・カセットハーフを対象としたものを例示したが、その
他の成形品に適した形状に変更することができ、これに
伴い冷却水溝の配置も自由に変更することができる。In the above-described embodiment, an example in which the molding recess 2 is intended for an audio cassette half has been described. However, the shape can be changed to a shape suitable for other molded products, and the arrangement of the cooling water grooves is accordingly free. Can be changed to
（考案の効果） 以上説明したように、本考案の射出成形金型によれ
ば、次のような効果を上げることができる。(Effects of the Invention) As described above, according to the injection mold of the present invention, the following effects can be obtained.
（１） 射出成形金型の熱伝導率を約２倍以上にするこ
とが可能となり、急速冷却が可能である。(1) The thermal conductivity of the injection mold can be made about twice or more, and rapid cooling is possible.
（２） 冷却水溝の配置の自由度が大きく、射出成形時
の温度上昇の激しい部分（成形用凹部の輪郭に沿った部
分や当該輪郭の内側に位置する部分等）に集中的に冷却
水溝を切ることができ、成形用凹部が複雑な形状であっ
ても温度ばらつきを最小にとどめることができる。(2) The degree of freedom in the arrangement of the cooling water grooves is large, and the cooling water is concentrated on portions where the temperature rises sharply during injection molding (portions along the contour of the concave portion for molding or portions located inside the contour, etc.). The grooves can be cut, and temperature variations can be kept to a minimum even if the molding concave portion has a complicated shape.
（３） 以上の（１），（２）の効果により成形サイク
ルに占める冷却時間を従来の２分の１から３分の１程度
に短縮可能である。(3) Due to the above effects (1) and (2), the cooling time occupying the molding cycle can be reduced from one half to one third of the conventional cooling time.
第１図は本考案に係る射出成形金型の実施例を示す平面
図、第２図は一部を断面とした同正面図、第３図は従来
の射出成形金型の平面図、第４図は一部を断面とした同
正面図である。 ２……成形用凹部、５……第１の金属部材、６……第２
の金属部材、7,8,9……冷却水溝。FIG. 1 is a plan view showing an embodiment of an injection molding die according to the present invention, FIG. 2 is a front view of the same with a partial cross section, FIG. 3 is a plan view of a conventional injection molding die, FIG. The figure is the same front view with a partial cross section. 2... Forming recesses, 5... First metal member, 6.
Metal members of 7,8,9 ... cooling water groove.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 池田 博 東京都中央区日本橋１丁目13番１号 テ ィーディーケイ株式会社内 (72)考案者 伊藤 武 東京都中央区日本橋１丁目13番１号 テ ィーディーケイ株式会社内 (56)参考文献 特開 昭59−142109（ＪＰ，Ａ) 特開 昭63−40688（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Hiroshi Ikeda 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDC Corporation (72) Inventor Takeshi Ito 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK (56) References JP-A-59-142109 (JP, A) JP-A-63-40688 (JP, A)
Claims (1)
て、前記成形用凹部を表面硬度の高い第１の金属部材の
主面に形成し、該主面の反対面に対接する熱伝動率の大
きな第２の金属部材の対接面の、少なくとも前記成形用
凹部の輪郭に沿った部分と当該輪郭の内側に位置する部
分とに冷却水溝を形成し、前記第１及び第２の金属部材
を水密に接合一体化したことを特徴とする射出成形金
型。In an injection mold having a concave portion for molding, the concave portion for molding is formed on a main surface of a first metal member having a high surface hardness, and a heat transfer coefficient of the first metal member in contact with an opposite surface of the main surface is reduced. Forming a cooling water groove in at least a portion along the contour of the forming concave portion and a portion located inside the contour of the contact surface of the large second metal member, and forming the first and second metal members; Injection-molding die, characterized by being integrally joined in a watertight manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990094804U JP2565301Y2 (en) | 1990-09-11 | 1990-09-11 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990094804U JP2565301Y2 (en) | 1990-09-11 | 1990-09-11 | Injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0452022U JPH0452022U (en) | 1992-05-01 |
| JP2565301Y2 true JP2565301Y2 (en) | 1998-03-18 |
Family
ID=33549084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990094804U Expired - Lifetime JP2565301Y2 (en) | 1990-09-11 | 1990-09-11 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2565301Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142109A (en) * | 1983-02-02 | 1984-08-15 | Matsushita Electric Ind Co Ltd | Mold for molding resin |
| JPS6340688A (en) * | 1986-08-01 | 1988-02-22 | Sumitomo Heavy Ind Ltd | Product of die having heat regulating medium path |
-
1990
- 1990-09-11 JP JP1990094804U patent/JP2565301Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0452022U (en) | 1992-05-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |