JPH0358565B2 - - Google Patents
Info
- Publication number
- JPH0358565B2 JPH0358565B2 JP60067199A JP6719985A JPH0358565B2 JP H0358565 B2 JPH0358565 B2 JP H0358565B2 JP 60067199 A JP60067199 A JP 60067199A JP 6719985 A JP6719985 A JP 6719985A JP H0358565 B2 JPH0358565 B2 JP H0358565B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- mold member
- cooling water
- sintered
- cooling
- 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
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は一部に焼結部材が用いられた例えばプ
ラスチツク等の射出成形に用いられる成形用金型
の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a mold for injection molding of, for example, plastic, in which a sintered member is used in part.
一般に、プラスチツク等の射出成形用金型にお
いては、金型のキヤビテイに射出された成形材料
を固化させるために金型を冷却して低温に保つ必
要がある。このため、従来この種の成形用金型を
製造する際には、該金型に機械加工により上記冷
却用水路を形成している。
Generally, in a mold for injection molding of plastic or the like, it is necessary to cool the mold and keep it at a low temperature in order to solidify the molding material injected into the cavity of the mold. For this reason, conventionally, when manufacturing this type of molding die, the cooling water channels are formed in the die by machining.
ところが、上記従来の成形用金型の製造方法に
あつては、金型の冷却用水路を機械加工により形
成しているため、単純な形状の水路しか形成する
ことができなかつた。
However, in the above-mentioned conventional method for manufacturing a molding die, since the cooling water channel of the mold is formed by machining, only a simple shaped water channel can be formed.
これに対して成形品の方は、近年、複雑な形状
のものを成形することが強く要望されるようにな
り、このため従来の単純な形状の水路では複雑な
形状のキヤビテイ内の成形材料を均一に冷却する
ことができないという問題が生じている。 On the other hand, in recent years, there has been a strong demand for molded products to be molded into complex shapes, and for this reason, the conventional simple shaped waterways are not able to handle the molding material inside complex shaped cavities. A problem arises in that uniform cooling is not possible.
一方、複雑な形状の冷却用水路を形成するに
は、表面に水路となる溝を形成した板状部材を接
合すればよいが、ボルトなどの接合では構造が複
雑になり、特に微細な金型の場合には実用的でな
い。また、接合面がスポツト的に接合されている
ので、冷却用水の圧力による膨張や、樹脂圧によ
るずれ変形などを将来することがある。これは、
周囲を溶接する場合にも同様である。 On the other hand, in order to form a cooling water channel with a complicated shape, it is possible to join plate-like members with grooves that will become water channels on their surfaces, but the structure becomes complicated when joining with bolts, etc., especially when using fine molds. impractical in some cases. Furthermore, since the joint surfaces are joined in spots, expansion due to the pressure of cooling water or shear deformation due to resin pressure may occur in the future. this is,
The same applies when welding the surrounding area.
本発明は従来のものがもつ以上のような問題点
を解決した成形用金型の製造方法を提供すること
を目的とする。 An object of the present invention is to provide a method for manufacturing a molding die that solves the above-mentioned problems of conventional molds.
本発明は前記目的を達成するために次のような
構成としている。すなわち、少なくとも一方が焼
結合金からなり、互いの対向面間に予め冷却用水
路が形成された一対の金属製の型部材を対向させ
て配置し、次いでこれら一対の型部材の対向面を
当接させて互いの当接面を高温加熱により接合固
着するものである。
In order to achieve the above object, the present invention has the following configuration. That is, a pair of metal mold members, at least one of which is made of a sintered alloy, and in which cooling channels are formed in advance between opposing surfaces, are placed facing each other, and then the opposing surfaces of the pair of mold members are brought into contact. Then, their contact surfaces are bonded and fixed by high-temperature heating.
以下、本発明の一実施例を第１図及び第２図に
基づいて説明する。
Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 and 2.
第１図および第２図は、本発明の成形用金型の
製造方法を実施するために用いられる型部材の一
例を示すものである。これらの図は、上型と下型
とからなる射出成形用金型の一方を、さらに２分
割してなる型部材をそれぞれ示すもので、第１図
は合金工具鋼（SKD11）からなる金型部材１、
第２図は鉄基焼結合金からなる焼結合金型部材２
である。 FIGS. 1 and 2 show an example of a mold member used to carry out the method of manufacturing a molding die of the present invention. These figures show the mold members made by further dividing one of the injection molds, which consists of an upper mold and a lower mold, into two parts. Figure 1 shows a mold member made of alloy tool steel (SKD11). Part 1,
Figure 2 shows a sintered metal mold member 2 made of iron-based sintered alloy.
It is.
金型部材１の表面には、テープレコーダに用い
られるカセツトケースの形状の凹部、即ちキヤビ
テイ（図示せず）が形成されている。 A cavity (not shown) is formed on the surface of the mold member 1 in the shape of a cassette case used in a tape recorder.
金型部材１の裏面には第１図に斜線で示した形
状の所定深さの溝（冷却用水路）３，４が形成さ
れている。これらの溝３，４は金型部材１の裏面
のキヤビテイに沿つて形成されている。 Grooves (cooling water channels) 3, 4 of a predetermined depth are formed in the back surface of the mold member 1 as shown by diagonal lines in FIG. These grooves 3 and 4 are formed along the cavity on the back surface of the mold member 1.
焼結合金型部材２は、Cr：６％，Ni：１％，
Ｃ：１％，Ｐ：0.5％，Fe及び不可避不純物；残
部よりなつている。この焼結合金型部材２には、
前記金型部材１の溝３，４の端部に対応して、第
２図に斜線で示した冷却水の出入用の孔（冷却用
水路）５，６，７，８が形成されている。 The sintered metal mold member 2 is made of Cr: 6%, Ni: 1%,
C: 1%, P: 0.5%, Fe and inevitable impurities; the balance consists of. This sintered metal mold member 2 includes:
Corresponding to the ends of the grooves 3 and 4 of the mold member 1, cooling water inlet and outlet holes (cooling water channels) 5, 6, 7, and 8, which are indicated by diagonal lines in FIG. 2, are formed.
また、金型部材１、焼結合金型部材２には、そ
れぞれこれらを位置合せするためのピン孔９，
９，１０，１０が形成されると共に、中子をセツ
トするための貫通孔１１，１１，１２，１３，１
３，１４及びガイド孔１５，１５，１５，１５，
１６，１６，１６，１６が形成されている。ピン
孔１０，１０にはそれぞれピン１７，１７が植設
されている。 The mold member 1 and the sintered mold member 2 also have pin holes 9 for aligning them, respectively.
9, 10, 10 are formed, and through holes 11, 11, 12, 13, 1 for setting the core are formed.
3, 14 and guide holes 15, 15, 15, 15,
16, 16, 16, 16 are formed. Pins 17, 17 are implanted in the pin holes 10, 10, respectively.
次ぎに、このようにして互いの当接面に予め冷
却用水路が形成された上記金型部材１および焼結
合金部材２を用いた本発明の一実施例について説
明する。 Next, an embodiment of the present invention will be described in which the mold member 1 and the sintered metal member 2 are used, in which cooling channels are formed in advance on their contact surfaces.
先ず、金型部材１のピン孔９，９にピン１７，
１７を嵌入することにより、焼結合金型部材２を
位置決めして重ね合せ、この後これら金型部材
１、焼結合金型部材２を0.1torrの真空中1130℃
に１時間高温加熱し、これにより金型部材１と焼
結合金型部材２との合せ目（互いの当接面）を接
合固着する。この接合固着は、金型部材１と焼結
合金型部材２との粒子間に十分な原子的結合が生
じるので、強固なものとなる。このように合せ目
が接合固着された上型または下型は仕上げ加工さ
れ射出成形用金型として提供される。なお、この
型構成体はその冷却過程において同時に焼入れ等
の熱処理ができる。 First, insert the pins 17 into the pin holes 9, 9 of the mold member 1.
17, the sintered metal mold member 2 is positioned and overlapped, and then the mold member 1 and the sintered metal mold member 2 are heated at 1130°C in a vacuum of 0.1 torr.
The mold member 1 and the sintered metal mold member 2 are heated at a high temperature for 1 hour, thereby bonding and fixing the joints (abutting surfaces between them). This bonding is strong because sufficient atomic bonding occurs between the particles of the mold member 1 and the sintered mold member 2. The upper mold or lower mold with the seams joined and fixed in this way is finished and provided as an injection mold. Note that this mold structure can be subjected to heat treatment such as hardening at the same time as the cooling process.
なお、射出成形用金型の上型と下型とのうちの
他方も前記一方の型構成体と同様に構成されてい
る。そして、射出成形時には、孔５，６，７，８
に適宜冷却水供給源、冷却水排出部を接続して冷
却水路３，４に冷却水を流し金型を冷却する。 The other of the upper and lower molds of the injection mold is also constructed in the same manner as the one mold structure. Then, during injection molding, holes 5, 6, 7, 8
A cooling water supply source and a cooling water discharge part are connected to the cooling water channels 3 and 4 as appropriate to flow cooling water to cool the mold.
以上のようにして製造された金型の金型部材１
と焼結合金型部材２との接合固着部は、超音波探
傷法によつて調べたところ、隙間等の未接合欠陥
は認められず、この接合部の接合強度は十分であ
つた。 Mold member 1 of the mold manufactured as above
When the bonded and fixed portion between the mold member 2 and the sintered metal mold member 2 was examined by ultrasonic flaw detection, no unbonded defects such as gaps were observed, and the bonding strength of this bonded portion was sufficient.
なお、比較のために、金型の厚さ方向において
本実施例とほぼ同じ位置に、第３図に斜線で示し
た形状の円孔（本実施例の溝３，４の幅と同じ直
径）からなる冷却用水路２１，２２を有する以外
は実施例と同一寸法、同一形状の従来の金型２３
を用意し、この金型２３と本実施例の金型とを用
いてそれぞれプラスチツクの射出成形を行なつた
ところ、本実施例の金型は、従来の単純形状の冷
却用水路２１，２２をもつ金型２３よりも冷却効
率がはるかに良く、金型の温度を所定温度に冷却
するのに要する時間が1/3となつた。 For comparison, a circular hole (with the same diameter as the width of the grooves 3 and 4 of this example) having the shape shown with diagonal lines in FIG. A conventional mold 23 having the same dimensions and shape as the embodiment except that it has cooling water channels 21 and 22 consisting of
was prepared, and injection molding of plastic was performed using this mold 23 and the mold of this example, respectively, and it was found that the mold of this example had cooling channels 21 and 22 of a conventional simple shape. The cooling efficiency was much better than that of mold 23, and the time required to cool the mold to a predetermined temperature was reduced to 1/3.
なお、前記実施例においては、射出成形用金型
の上型、下型を分割した型部材の一方を合金工具
鋼、他方を焼結合金により形成したが、これら限
られることなく両方を焼結合金により形成しても
よい。 In the above embodiment, one of the upper and lower mold members of the injection molding mold is formed of alloy tool steel and the other is formed of sintered alloy, but the invention is not limited to this. It may be made of gold.
本発明は、少なくとも一方が焼結合金からな
り、互いの対向面間に予め冷却用水路が形成され
た一対の金属製の型部材を対向させて配置し、次
いでこれら一対の型部材の対向面を当接させて互
いの当接面を高温加熱により接合固着するので、
複雑な冷却用水路を形成することができ、しかも
変形の少ない金型を得ることができる。その結
果、金型のキヤビテイ内に射出された成形材料を
均一に冷却することができ、複雑な形状でありな
がら寸法精度が良くて均一な成形品を成形するこ
とができる成形用金型を得ることができる。ま
た、金型の冷却効率が向上するので成形能率も高
くなり、かつ金型の寿命が伸びるから、成形品の
成形コストを大幅に下げることができる。
In the present invention, a pair of metal mold members, at least one of which is made of a sintered alloy, and in which cooling channels are formed in advance between the opposing surfaces, are arranged to face each other, and then the opposing surfaces of the pair of mold members are Since the contact surfaces are bonded and fixed by high-temperature heating,
A complex cooling water channel can be formed and a mold with little deformation can be obtained. As a result, the molding material injected into the mold cavity can be cooled uniformly, and a molding mold that can mold a uniform molded product with good dimensional accuracy despite having a complex shape is obtained. be able to. Furthermore, since the cooling efficiency of the mold is improved, the molding efficiency is also increased, and the life of the mold is extended, so that the molding cost of the molded product can be significantly reduced.
第１図及び第２図は本発明の一実施例に用いら
れる成形用金型の型部材を示すもので、第１図は
分割された一方の型部材の裏面図、第２図は分割
された他方の型部材の平面図、第３図は従来の射
出成形用金型の冷却用水路を有する型部材の平面
図である。
１……金型部材、２……焼結合金型部材、３，
４……溝（冷却用水路）、５，６，７，８……孔
（冷却用水路）。
Figures 1 and 2 show the mold members of a molding die used in one embodiment of the present invention. FIG. 3 is a plan view of a mold member having a cooling water channel of a conventional injection mold. 1...Mold member, 2...Sintered metal mold member, 3,
4...grooves (cooling water channels), 5, 6, 7, 8... holes (cooling water channels).
Claims (1)
対向面間に予め冷却用水路が形成された一対の金
属製の型部材を対向させて配置し、次いでこれら
一対の型部材の対向面を当接させて互いの当接面
を高温加熱により接合固着することを特徴とする
成形用金型の製造方法。1. A pair of metal mold members, at least one of which is made of a sintered alloy, and in which cooling channels are formed in advance between opposing surfaces, are placed facing each other, and then the opposing surfaces of the pair of mold members are brought into contact with each other. A method for producing a molding die, characterized in that the abutting surfaces of the molds are bonded and fixed by high-temperature heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6719985A JPS61227004A (en) | 1985-03-30 | 1985-03-30 | Molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6719985A JPS61227004A (en) | 1985-03-30 | 1985-03-30 | Molding die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61227004A JPS61227004A (en) | 1986-10-09 |
| JPH0358565B2 true JPH0358565B2 (en) | 1991-09-05 |
Family
ID=13337994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6719985A Granted JPS61227004A (en) | 1985-03-30 | 1985-03-30 | Molding die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61227004A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5145626A (en) * | 1974-10-18 | 1976-04-19 | Nippon Electro Plating | CHOJAKUZAINORENZOKUBUBUNMETSUKIHOHOTO SONOSOCHI |
-
1985
- 1985-03-30 JP JP6719985A patent/JPS61227004A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61227004A (en) | 1986-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20060055085A1 (en) | Layered metal mold and method of using the same for molding | |
| US7824173B2 (en) | Apparatus for molding a hollow molded article | |
| JP2729900B2 (en) | Molding method and molding die for hollow product | |
| JPH0834032A (en) | Hollow molded product and production thereof | |
| JPH06238728A (en) | Mold | |
| JPH0358565B2 (en) | ||
| US20070104824A1 (en) | Laminant hot runner manifold | |
| JPH02292005A (en) | Manufacture of mold | |
| JPH0349730B2 (en) | ||
| JPH05254022A (en) | Fusing method of ends of thermoplastic resin band | |
| JPS59368B2 (en) | Seikeiyou Kanagata | |
| JPH09193170A (en) | Molding tool for gasket and manufacture thereof | |
| JPH0322807B2 (en) | ||
| JPS61290019A (en) | Insert molding and method of preparation thereof | |
| JP3105085B2 (en) | Resin molding and coating equipment | |
| JP2001162350A (en) | Metallic mold including heating and cooling circuits of fluid and manufacturing method therefor | |
| JPH02307718A (en) | Formation of pierced road in body and the road | |
| JPH0811155A (en) | Molding method for hollow molded products | |
| JPS62189150A (en) | Manufacture of tape reel | |
| JPH0126852B2 (en) | ||
| JPS625299Y2 (en) | ||
| JP2004174606A (en) | Metallic mold including heating/cooling circuit of fluid and its manufacturing method | |
| JPS58212925A (en) | Injection die | |
| JPH02171B2 (en) | ||
| JP2000043056A (en) | Die for molding plastic with temperature control hole and its manufacture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |