JP2000317603A5 - - Google Patents
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- JP2000317603A5 JP2000317603A5 JP1999132495A JP13249599A JP2000317603A5 JP 2000317603 A5 JP2000317603 A5 JP 2000317603A5 JP 1999132495 A JP1999132495 A JP 1999132495A JP 13249599 A JP13249599 A JP 13249599A JP 2000317603 A5 JP2000317603 A5 JP 2000317603A5
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- JP
- Japan
- Prior art keywords
- flow path
- metal material
- runner
- injection molding
- molding die
- 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.)
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- 239000007769 metal material Substances 0.000 description 22
- 238000000465 moulding Methods 0.000 description 15
- 239000002184 metal Substances 0.000 description 14
- 238000001816 cooling Methods 0.000 description 13
- 238000001746 injection moulding Methods 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 1
Description
【特許請求の範囲】
【請求項１】 加熱溶融された金属材料を、成形金型のスプール流路内に射出して、流動させ、
前記成形金型における前記スプール流路とキャビティの間のランナ流路において金属材料を固相線温度以上であって液相線温度以下の温度範囲になるよう冷却するとともに、前記ランナ流路断面積に比較して小さな流路断面積に絞ったゲート部を通過させ、金属材料を前記キャビティ内に流入させて充填することを特徴とする金属射出成形方法。
【請求項２】 成形金型のランナ流路におけるゲート部の近傍箇所において、前記ランナ流路に突き出る突起物によって金属材料に対し剪断力を付与するとともに、金属材料を前記突起物を通じ吸熱源に伝熱させて冷却するようにした請求項１に記載の金属射出成形方法。
【請求項３】 成形金型のランナ流路におけるゲート部の近傍箇所において、金属材料をその流動方向に沿って互いに平行な複数の流動路に分断させながら流動させ、金属材料をキャビティ内に流入させて充填する請求項１に記載の金属射出成形方法。
【請求項４】 加熱溶融した金属材料をノズルから射出する射出機と、
前記ノズルに連通するスプール流路およびランナ流路と、成形品の形状に対応する空間に形成されたキャビティと、前記ランナ流路と前記キャビティとの間に存在するゲート部とを有する成形金型とを備えてなり、
前記成形金型に、前記スプール流路内の金属材料を液相線温度以上になるよう加熱する加熱手段と、前記ランナ流路および前記ゲート部の内部を流動する金属材料を固相線温度以上であって液相線温度以下の温度範囲になるよう冷却する冷却手段とを有し、
前記ゲート部は、前記ランナ流路断面積に比較して小さな流路断面積に絞られていることを特徴とする金属射出成形装置。
【請求項５】 成形金型に、冷却手段を内蔵した冷却ユニット体と、前記冷却手段に対し伝熱可能な状態で前記冷却ユニット体から突出した複数の突出ピンとが、前記各突出ピンの先端部がランナ流路におけるゲート部の近傍箇所において金属材料の流動方向に対し直交方向に向け突き出る配置で設けられている請求項４に記載の金属射出成形装置。
【請求項６】 成形金型のランナ流路におけるゲート部の近傍箇所に、金属材料の流動方向に沿って延びる複数の仕切り突壁が互いに平行な配置で突設されている請求項４に記載の金属射出成形装置。
【請求項７】 請求項１乃至請求項３の何れかの金属射出成形方法によって射出成形された成形品。
[Claims]
(1) Heated and meltedMetal material, SuccessInjected into the spool flow path of the molddo it,Let it flow
In the runner flow path between the spool flow path and the cavity in the molding die, the metal material is cooled to a temperature range from the solidus temperature to the liquidus temperature, and the runner flow pathCross sectionCompared toSmallThrough the gate section narrowed to,Metal materialBeforeA metal injection molding method characterized by flowing into and filling the cavity.
2. A shearing force is applied to a metal material by a protrusion protruding into the runner flow path at a position near a gate portion in a runner flow path of a molding die, and the metal material is supplied to a heat absorbing source through the protrusion. 2. The metal injection molding method according to claim 1, wherein heat is transferred and cooling is performed.
3. The method according to claim 1, wherein the flow of the metal material is divided into a plurality of flow paths parallel to each other along the flow direction at a location near the gate in the runner flow path of the molding die.LetMetal materialInto the cavity and fillThe metal injection molding method according to claim 1.
(4) Heated and meltedMetal materialTheAn injection machine that injects from the vine,
A molding die having a spool flow path and a runner flow path communicating with the nozzle, a cavity formed in a space corresponding to the shape of a molded product, and a gate portion existing between the runner flow path and the cavity And
In the molding die, thespoolHeating means for heating the metal material in the flow path to a temperature equal to or higher than the liquidus temperature, and a metal material flowing in the runner flow path and the inside of the gate portion being equal to or higher than the solidus temperature and equal to or lower than the liquidus temperature Cooling means for cooling to a temperature range of
The gate portion is provided in the runner flow path.Cross sectionCompared toSmallA metal injection molding apparatus characterized in that it is narrowed to a small flow path cross-sectional area.
5. A cooling unit body having a cooling means built in a molding die, and a plurality of projecting pins projecting from the cooling unit body so as to be able to conduct heat to the cooling means, the tip of each of the projecting pins. The metal injection molding apparatus according to claim 4, wherein the portion is provided at a location near the gate portion in the runner flow path so as to protrude in a direction orthogonal to the flow direction of the metal material.
6. A plurality of partitioning projecting walls extending along a direction in which a metal material flows in a runner flow path of a molding die in the vicinity of a gate portion, the plurality of partitioning projecting walls projecting in parallel with each other. Metal injection molding equipment.
7. A molded article injection-molded by the metal injection molding method according to claim 1.
【００１０】
【課題を解決するための手段】
上記目的を達成するために、本発明の金属射出成形方法は、加熱溶融された金属材料を、成形金型のスプール流路内に射出して、流動させ、前記成形金型における前記スプール流路とキャビティの間のランナ流路において金属材料を固相線温度以上であって液相線温度以下の温度範囲になるよう冷却するとともに、前記ランナ流路断面積に比較して小さな流路断面積に絞ったゲート部を通過させ、金属材料を前記キャビティ内に流入させて充填することを特徴としている。
[0010]
[Means for Solving the Problems]
To achieve the above object, a metal injection molding method of the present invention, the heated molten metal material is injected for forming metal mold of the spool passage, to flow, the spool flow in the molding die to cool so that the road-and liquidus temperature below the temperature range a is a metal material solidus temperature above the runner flow path between the cavities, small Sana flow compared to the runner flow path cross-sectional area passed through a gate portion for limiting to passage sectional area, and wherein the filling by flowing before Symbol cavity of a metal material.
この金属射出成形方法では、加熱溶融された金属材料は、ランナ流路を流動するときに固相線温度以上であって液相線温度以下の温度範囲になるよう冷却されるとともに、ランナ流路断面積に比較して小さな流路断面積に絞られたゲート部を通過するときに十分な剪断力を与えられて、冷却によって生成してくる樹枝晶組織の少なくとも一部分を破壊される。これにより、金属材料は、再びチクソトロピ性を発現させてキャビティに流入するので、成形品は、冷却時の引けが殆ど発生せず、且つ成形金型に対する転写性に優れて高い表面精度を有するものとなる。 In this metal injection molding method, the heat-fused metal material is cooled so as to be in a temperature range not lower than the solidus temperature and not higher than the liquidus temperature when flowing through the runner flow path, and compared to the cross-sectional area given a sufficient shear force when passing through a gate portion which is narrowed down to small flow passage cross-sectional area, is destroyed at least a portion of the dendritic crystal structure coming generated by the cooling. As a result, the metal material expresses the thixotropic property again and flows into the cavity, so that the molded product hardly causes shrinkage upon cooling, and has excellent surface transferability with excellent transferability to the molding die. Becomes
一方、上記発明の成形方法において、成形金型のランナ流路におけるゲート部の近傍箇所において、金属材料をその流動方向に沿って互いに平行な複数の流動路に分断させながら流動させて、金属材料をキャビティ内に流入させて充填するように構成することもできる。 On the other hand, in the molding method of the present invention, the metal material is caused to flow while being divided into a plurality of flow paths parallel to each other along the flow direction at a location near the gate in the runner flow path of the molding die. the can also configure to fill by flowing into the cavity.
本発明の金属射出成形装置は、加熱溶融した金属材料をノズルから射出する射出機と、前記ノズルに連通するスプール流路およびランナ流路と、成形品の形状に対応する空間に形成されたキャビティと、前記ランナ流路と前記キャビティとの間に存在するゲート部とを有する成形金型とを備えてなり、前記成形金型に、前記スプール流路内の金属材料を液相線温度以上になるよう加熱する加熱手段と、前記ランナ流路および前記ゲート部の内部を流動する金属材料を固相線温度以上であって液相線温度以下の温度範囲になるよう冷却する冷却手段とを有し、前記ゲート部は、前記ランナ流路断面積に比較して小さな流路断面積に絞られていることを特徴とする。 Metal injection molding apparatus of the present invention, an injection machine for injecting a heated molten metal material from Bruno nozzle, a spool channel and runner channel communicating with the nozzle, formed in a space corresponding to the shape of the molded article A cavity, and a molding die having a gate portion existing between the runner flow passage and the cavity, wherein the molding die is provided with a metal material in the spool flow passage at a liquidus temperature or higher. Heating means for heating the metal material flowing inside the runner flow path and the gate portion, and cooling means for cooling the metal material to a temperature range not lower than the solidus temperature and not higher than the liquidus temperature. has the gate unit is characterized by being squeezed into the flow path cross-sectional area small compared to the runner flow path cross-sectional area.
【００３５】
【発明の効果】
以上のように、本発明の金属射出成形方法によれば、冷却に伴い生成してくる樹枝晶組織の少なくとも一部分を破壊できるので、冷却時の引けが殆ど発生せず、且つ成形金型に対する転写性に優れて高い表面精度を有する成形品を得られる。しかも、空隙率の低い高品質の成形品が得られ、さらに、ガスの巻き込みによる巣やバリなどが殆ど発生しない成形品を得られる。
[0035]
【The invention's effect】
As described above, according to the metal injection molding method of the present invention, it is possible to destroy at least a portion of the dendritic crystal structure coming generated due to cooling, shrinkage during cooling hardly occur, and for the molding die A molded article having excellent transferability and high surface accuracy can be obtained. In addition, the low sky porosity high-quality molded articles can be obtained, further, to obtain a molded article such as a nest and burrs due to entrainment of gas is hardly generated.
本発明の金属射出成形装置によれば、本発明の金属射出成形方法を忠実に具現化してその成形方法の効果を確実に得ることができる。 According to the metal injection molding apparatus of the present invention , the metal injection molding method of the present invention can be faithfully embodied and the effects of the molding method can be reliably obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13249599A JP4156748B2 (en) | 1999-05-13 | 1999-05-13 | Metal injection molding method and apparatus, and molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13249599A JP4156748B2 (en) | 1999-05-13 | 1999-05-13 | Metal injection molding method and apparatus, and molded product |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2000317603A JP2000317603A (en) | 2000-11-21 |
| JP2000317603A5 true JP2000317603A5 (en) | 2006-06-29 |
| JP4156748B2 JP4156748B2 (en) | 2008-09-24 |
Family
ID=15082719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13249599A Expired - Fee Related JP4156748B2 (en) | 1999-05-13 | 1999-05-13 | Metal injection molding method and apparatus, and molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4156748B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPR721501A0 (en) * | 2001-08-23 | 2001-09-13 | Commonwealth Scientific And Industrial Research Organisation | Process and apparatus for producing shaped metal parts |
| CN103286294A (en) * | 2012-02-29 | 2013-09-11 | 瑞鼎机电科技（昆山）有限公司 | Injection chamber heating device for die-casting machines |
| JP5763584B2 (en) * | 2012-05-29 | 2015-08-12 | 株式会社ダイエンジニアリング | Chill vent |
| CN112808969A (en) * | 2019-11-18 | 2021-05-18 | 昆山旭龙精密机械有限公司 | Aluminum alloy casting die-casting die |
| CN112719239A (en) * | 2020-12-10 | 2021-04-30 | 宁川钧 | Cooling device for die-casting production |
| CN114273634B (en) * | 2021-12-30 | 2023-10-20 | 内蒙古北方重工业集团有限公司 | Production method for eliminating defects of die casting threaded holes |
-
1999
- 1999-05-13 JP JP13249599A patent/JP4156748B2/en not_active Expired - Fee Related
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