JPH03433A - Method for repairing metallic mold - Google Patents
Method for repairing metallic moldInfo
- Publication number
- JPH03433A JPH03433A JP13649789A JP13649789A JPH03433A JP H03433 A JPH03433 A JP H03433A JP 13649789 A JP13649789 A JP 13649789A JP 13649789 A JP13649789 A JP 13649789A JP H03433 A JPH03433 A JP H03433A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- repairing
- repaired
- repair
- eutectic alloy
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 48
- 239000006023 eutectic alloy Substances 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000010953 base metal Substances 0.000 claims abstract description 10
- 230000008439 repair process Effects 0.000 claims description 43
- 230000008018 melting Effects 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 13
- 238000009792 diffusion process Methods 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000005304 joining Methods 0.000 abstract description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 6
- 238000001000 micrograph Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910000640 Fe alloy Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000007542 hardness measurement Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はプレス用金型、射出成形用金型或いは鋳造用金
型の補修方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for repairing a press mold, an injection mold, or a casting mold.
（従来の技術）
金型の一部を部分補修したい場合などには従来からアー
ク溶接或いはガス溶接を利用した補修を行っている。(Prior Art) When it is desired to partially repair a part of a mold, arc welding or gas welding has traditionally been used for repair.
アーク溶接は約６０００℃のアーク熱によって金型の母
材とこの母材と同一材の補修材（ｉ手）間を溶かして接
合する方法であり、ガス溶接は酸素アセチレン炎等を用
いて型全体を融点以下の温度例えば８５０〜９００℃の
高温に加熱し、更に補修する部分の母材及び補修材の双
方を１４００℃以上に加熱して補修部分に溶融池を作り
、これを冷却する方法である。Arc welding is a method of melting and joining the base material of the mold and the repair material (i-hand) made of the same material using arc heat of approximately 6000℃, while gas welding uses an oxyacetylene flame etc. to join the mold. A method in which the entire body is heated to a high temperature below the melting point, for example 850 to 900°C, and then both the base material and the repair material of the part to be repaired are heated to 1400°C or higher to create a molten pool in the repaired part, which is then cooled. It is.
（発明が解決しようとする課題）
第６図（Ａ）、（Ｂ）、（Ｃ）は夫々従来法によって補
修した金型の補修部分の金属組織を示す顕微鏡写真（４
００倍）であり、いずれも母材を鋳鉄とした点は同じで
あるが、第６図（Ａ）は補修材を５５％Ｎｉ −Ｆｅ合
金としてアーク溶接によって補修した部分の金属組織を
示す顕微鏡写真（４００倍）、第６図（Ｂ）は補修材を
５５％Ｎ１−Ｆｅ合金としてアルゴンアーク溶接によっ
て補修した部分の金属組織を示す顕微鏡写真（４００倍
）及び第６図（Ｃ）は補修材をＦｅ合金としアーク溶接
によって補修した部分の金属組織を示す顕微鏡写真（１
００倍）である、また第４図（Ｂ）は上記各金属組織の
母材と補修した部分の硬度測定の結果を示すグラフであ
る。(Problems to be Solved by the Invention) Figures 6 (A), (B), and (C) are micrographs (4
00 times), and both are the same in that the base material is cast iron, but Figure 6 (A) is a microscope showing the metal structure of the part repaired by arc welding using a 55% Ni-Fe alloy as the repair material. The photo (400x) and Figure 6 (B) are micrographs (400x) showing the metal structure of the part repaired by argon arc welding using a 55% N1-Fe alloy as the repair material, and Figure 6 (C) shows the repair Micrograph (1) showing the metal structure of the part repaired by arc welding using Fe alloy material.
00 times), and FIG. 4(B) is a graph showing the results of hardness measurements of the base material and the repaired portion of each of the metal structures described above.
これらの図から明らかなように、従来方法による場合は
高熱によって母材の一部を補修材とともに溶融せしめた
後に冷却凝固させるようにしているので、母材と補修材
との境界部がチル化して高硬度となってしまい、補修後
の仕上げ加工を困難としている。具体例を挙げると、バ
ンパーを成形するための射出成形用の金型にあっては、
成形面に化学的エツチングによって装飾用の絞（シボ）
を形成しておく場合があり、このような金型の成形面を
補修したとすると、補修後の補修部分の硬度が他の部分
より大であるため、補修後に再度当該補修部分にエツチ
ングを施しても絞の大きさが前にあったものと異なり、
これが射出成形の際に製品に薄いラインとなフて転写さ
れ商品価値を低下させる。As is clear from these figures, in the conventional method, a part of the base material is melted together with the repair material using high heat and then cooled and solidified, so the boundary between the base material and the repair material is chilled. This results in high hardness, making finishing processing after repair difficult. To give a specific example, in the case of an injection mold for molding a bumper,
Decorative embossing (graining) by chemical etching on the molded surface
If the molding surface of such a mold is repaired, the hardness of the repaired part after the repair is greater than other parts, so the repaired part must be etched again after the repair. However, the aperture size is different from the previous one,
This is transferred as a thin line to the product during injection molding, reducing the product value.
また、鋳鉄製の金型を補修する場合には金型の母材中に
大量の炭素（Ｃ）が含まれており、高温で処理する間に
該炭素（Ｃ）が酸化してガスとなり、これがブローホー
ル発生の原因となる。In addition, when repairing a cast iron mold, the base material of the mold contains a large amount of carbon (C), and during treatment at high temperatures, the carbon (C) oxidizes and becomes a gas. This causes blowholes to occur.
また、従来方法にあっては、金型の成形面の一部を突出
せしめるような補修ができない。Furthermore, with the conventional method, it is not possible to repair a part of the molding surface of the mold so that it protrudes.
更に最近では型温コントロールをしつつ鋳造するため、
胴金型が用いられているが、この胴金型にあっては型温
のコントロールを正確に行うため成形面に近い部分に温
度調整用ジャケットを形成している。このような胴金型
に金型の一部を溶融する従来の補修方法をそのまま適用
すると、ジャケットの部分まで溶融によって穴があくお
それもある。Furthermore, recently, in order to perform casting while controlling the mold temperature,
A body mold is used, and in order to accurately control mold temperature, this body mold has a temperature adjustment jacket formed near the molding surface. If the conventional repair method of melting part of the mold is applied to such a shell mold as is, there is a risk that holes will be formed in the jacket part due to the melting.
（課題を解決するための手段）
上記課題を解決すべく本発明は、金型を構成する母材金
属よりも低融点の共晶合金を用意し、この共晶合金を補
修すべき部分に埋め込むか盛付けた後、母材金属の融点
よりも低い温度で共晶合金を加熱し、母材金属と共晶合
金とを拡散接合するようにした。(Means for Solving the Problems) In order to solve the above problems, the present invention prepares a eutectic alloy having a lower melting point than the base metal constituting the mold, and embeds this eutectic alloy in the part to be repaired. After being plated, the eutectic alloy was heated at a temperature lower than the melting point of the base metal to diffusion bond the base metal and the eutectic alloy.
（作用）
一般に共晶合金は当該合金を構成する金属よりもその融
点が低くなる。したがって例えば金型を構成する金属と
他の金属との共晶合金を補修材として用いれば、金型を
溶融することなく補修材と金型金属とを溶着（拡散接合
）せしめることができる。(Function) Generally, a eutectic alloy has a lower melting point than the metal that constitutes the alloy. Therefore, for example, if a eutectic alloy of the metal constituting the mold and another metal is used as the repair material, the repair material and the mold metal can be welded (diffusion bonded) without melting the mold.
（実施例） 以下に本発明の実施例を添付図面に基いて説明する。(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明方法によって補修した金型の断面図、第
２図及び第３図は同金型の補修部分の拡大図である。FIG. 1 is a sectional view of a mold repaired by the method of the present invention, and FIGS. 2 and 3 are enlarged views of the repaired portion of the same mold.
金型１は鋳鉄、鋼或いは銅などによって構成され、内部
には温調用バイブ２が埋設され、キャビテイ面３の中央
には射出用ノズル４が開口し、更にキャビテイ面３の部
分５を埋め込み補修部とし、部分６を盛り付は補修部と
している。The mold 1 is made of cast iron, steel, copper, etc., a temperature control vibrator 2 is buried inside, an injection nozzle 4 is opened in the center of the cavity surface 3, and a part 5 of the cavity surface 3 is buried for repair. section, and section 6 is the repair section.
部分５を補修するには第２図（Ａ）に示すように金型１
のキャビテイ面３に形成された凹部７に共晶合金からな
る補修材８を臨ませ、溶融トーチ９から噴出する炎によ
って補修材８を溶融して第２図（Ｂ）に示すように凹部
７内に埋め込み補修材８と金型１の母材金属とをその境
界部において相互拡散せしめて強固に接合する。To repair part 5, mold 1 as shown in Figure 2 (A).
A repair material 8 made of a eutectic alloy is placed in front of the recess 7 formed in the cavity surface 3, and the repair material 8 is melted by the flame ejected from the melting torch 9 to form the recess 7 as shown in FIG. 2(B). The embedded repair material 8 and the base metal of the mold 1 are mutually diffused at the boundary and are firmly joined.
ここで補修を行うにあたっては予しめ部分５を予熱して
おく。予熱温度は例えば母材が鋳鉄の場合は４００〜５
００℃とする。また補修材８の加熱温度としては補修材
８を構成する共晶合金の融点よりも高く母材の融点より
も低い温度とする。例えば鉄と他の金属との共晶合金の
場合には５００〜７５０℃で補修材８を溶融せしめる。Before performing the repair here, the portion 5 is preheated in advance. For example, if the base material is cast iron, the preheating temperature is 400-5.
00℃. The heating temperature of the repair material 8 is higher than the melting point of the eutectic alloy constituting the repair material 8 and lower than the melting point of the base material. For example, in the case of a eutectic alloy of iron and other metals, the repair material 8 is melted at 500 to 750°C.
尚、共晶合金を構成する一方の金属としては母材との相
互拡散のしやすさを考慮すると、母材金属と同一の金属
とするのが好ましい。即ち、鋳鉄製の金型の補修材とし
ては鉄共晶合金を用い、銅製の金型の補修材としては銅
共晶合金を用いる。Note that one of the metals constituting the eutectic alloy is preferably the same metal as the base metal, considering ease of interdiffusion with the base metal. That is, an iron eutectic alloy is used as a repair material for cast iron molds, and a copper eutectic alloy is used as a repair material for copper molds.
一方、部分６に盛り付は補修を行う場合も第３図（Ａ）
に示すように補修すべき部分の上に補修材８を臨ませ、
この補修材８を溶接トーチ９によって溶融せしめ、第３
図（Ｂ）に示すようにキャビテイ面３上に溶融した補修
材８を盛り付ける。この場合も母材と補修材８との境界
部は相互拡散によって強固に接合している。On the other hand, if the portion 6 is to be repaired, see Figure 3 (A).
Place the repair material 8 over the area to be repaired as shown in
This repair material 8 is melted by a welding torch 9, and a third
As shown in Figure (B), molten repair material 8 is placed on the cavity surface 3. In this case as well, the boundary between the base material and the repair material 8 is firmly joined by mutual diffusion.
（発明の効果）
以下の〔表１〕は補修材の化学成分を示し、〔表２〕は
補修部の機械的性質を示すものである。(Effects of the Invention) [Table 1] below shows the chemical components of the repair material, and [Table 2] shows the mechanical properties of the repaired part.
（以下、余白）
また、第４図（Ａ）は本発明方法によフて補修した部分
の硬度分布を示すグラフ、第５図 （Ａ）。(Hereinafter, blank spaces) FIG. 4(A) is a graph showing the hardness distribution of the portion repaired by the method of the present invention, and FIG. 5(A) is a graph showing the hardness distribution of the portion repaired by the method of the present invention.
（Ｂ）は夫々本発明方法によって補修した部分の金属組
織を示す顕微鏡写真であり、いずれも用材を鋳鉄とし、
共晶合金をＦｃ共晶合金とした点は同じであり、第５図
（Ａ）は１００倍、第５図（Ｂ）は４００倍の拡大写真
である。(B) are micrographs showing the metallographic structure of the parts repaired by the method of the present invention, in which the materials used are cast iron;
They are the same in that the eutectic alloy is an Fc eutectic alloy, and FIG. 5(A) is a 100x enlarged photograph, and FIG. 5(B) is a 400x enlarged photograph.
以上の〔表〕及び図面から明らかなように本発明によれ
ば、低温にて金型の補修が行えるので、境界部の硬度が
略一定となり仕上げ加工等に支障をきたすことがない。As is clear from the above table and drawings, according to the present invention, the mold can be repaired at a low temperature, so that the hardness of the boundary portion is approximately constant and does not interfere with finishing processing, etc.
また低温にて補修するためブローホール等の欠陥が発生
するのを抑制でき、且つ成形面近くに温調用のジャケッ
トを配した金型であフても母材を溶融することがないの
で、容易に補修することができる。In addition, since repairs are performed at low temperatures, defects such as blowholes can be suppressed, and even if the mold is equipped with a temperature control jacket near the molding surface, the base material will not melt, making it easy to repair. can be repaired.
更に母材と補修材とは相互拡散によって接合するため、
補修箇所が剥れる等のおそれもなく、盛り付は補修も可
能である。Furthermore, since the base material and repair material are bonded by mutual diffusion,
The arrangement can be repaired without fear of peeling off the repaired area.
第１図は本発明方法によって補修した金型の断面図、第
２図 （Ａ）、（Ｂ）及び第３図 （Ａ）。
（Ｂ）は補修部分の補修前と補修後の状態を示す拡大断
面図、第４図（Ａ）及び（Ｂ）は本発明方法及び従来法
によって補修した部分の硬度測定の結果を示すグラフ、
第５図 （Ａ）、（Ｂ）は夫々本発明方法によって補修
した部分の金属組織を示す顕＠鏡写真、第６図（Ａ）、
（Ｂ）、（Ｃ）は夫々従来方法によって補修した部分の
金属組織を示す顕微鏡写真である。
尚、図面中１は金型、２は温調用バイブ、３はキャビテ
イ面、５．６は補修部分、８は補修材である。
特 許 出 願 人 本田技研工業株式会社代 理
人 弁理士 下 １）容−即問 弁理士
大 橋 邦 度量 弁理士 小
山 有第４図
（Ａ）
（Ｂ）FIG. 1 is a sectional view of a mold repaired by the method of the present invention, FIG. 2 (A), (B), and FIG. 3 (A). (B) is an enlarged sectional view showing the state of the repaired portion before and after repair, and FIGS. 4(A) and (B) are graphs showing the results of hardness measurements of the portion repaired by the method of the present invention and the conventional method.
Figure 5 (A) and (B) are microscopic photographs showing the metal structure of the part repaired by the method of the present invention, Figure 6 (A),
(B) and (C) are micrographs showing the metal structure of a portion repaired by a conventional method, respectively. In the drawings, 1 is a mold, 2 is a temperature control vibrator, 3 is a cavity surface, 5.6 is a repair portion, and 8 is a repair material. Patent applicant: Honda Motor Co., Ltd. Agent
Person Patent Attorney Part 2 1) Yong-Immediate Question Patent Attorney
Kuni Ohashi Patent Attorney Small
Yama Yu Figure 4 (A) (B)
Claims (2)
からなる補修材を母材金属の融点よりも低い温度で加熱
し、金型の補修すべき部分に前記補修材を埋め込むか又
は盛り付け、母材と補修材とを拡散接合せしめるように
したことを特徴とする金型の補修方法。(1) A repair material made of a eutectic alloy with a lower melting point than the base metal constituting the mold is heated at a temperature lower than the melting point of the base metal, and the repair material is embedded in the part of the mold to be repaired. A method for repairing a mold, characterized in that the base material and the repair material are diffusion bonded.
金であることを特徴とする請求項１に記載の金型の補修
方法。(2) The mold repair method according to claim 1, wherein the eutectic alloy is an alloy of a base metal of the mold and another metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13649789A JPH03433A (en) | 1989-05-30 | 1989-05-30 | Method for repairing metallic mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13649789A JPH03433A (en) | 1989-05-30 | 1989-05-30 | Method for repairing metallic mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03433A true JPH03433A (en) | 1991-01-07 |
Family
ID=15176548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13649789A Pending JPH03433A (en) | 1989-05-30 | 1989-05-30 | Method for repairing metallic mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03433A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100460051B1 (en) * | 2002-09-13 | 2004-12-04 | 한국전기초자 주식회사 | A repairing method of mold for crt glassware |
| JP2007009323A (en) * | 2005-06-01 | 2007-01-18 | Honda Motor Co Ltd | Die repairing method |
| WO2007141854A1 (en) * | 2006-06-07 | 2007-12-13 | Asahi Co., Ltd | Method for repairing mold, heat-resistant inorganic repairing material, mold, molded article and product |
| EP3254872A1 (en) | 2016-06-08 | 2017-12-13 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
| CN111760936A (en) * | 2020-06-30 | 2020-10-13 | 金燕 | Automatic repair equipment for dents of automobile metal plates |
-
1989
- 1989-05-30 JP JP13649789A patent/JPH03433A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100460051B1 (en) * | 2002-09-13 | 2004-12-04 | 한국전기초자 주식회사 | A repairing method of mold for crt glassware |
| JP2007009323A (en) * | 2005-06-01 | 2007-01-18 | Honda Motor Co Ltd | Die repairing method |
| WO2007141854A1 (en) * | 2006-06-07 | 2007-12-13 | Asahi Co., Ltd | Method for repairing mold, heat-resistant inorganic repairing material, mold, molded article and product |
| JP4884468B2 (en) * | 2006-06-07 | 2012-02-29 | 株式会社 旭 | Mold repair method, heat-resistant inorganic repair material and mold |
| EP3254872A1 (en) | 2016-06-08 | 2017-12-13 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
| CN111760936A (en) * | 2020-06-30 | 2020-10-13 | 金燕 | Automatic repair equipment for dents of automobile metal plates |
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