JPH04123862A - Method for casting - Google Patents
Method for castingInfo
- Publication number
- JPH04123862A JPH04123862A JP2245894A JP24589490A JPH04123862A JP H04123862 A JPH04123862 A JP H04123862A JP 2245894 A JP2245894 A JP 2245894A JP 24589490 A JP24589490 A JP 24589490A JP H04123862 A JPH04123862 A JP H04123862A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- sprue
- pouring
- casting
- feeding head
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000003832 thermite Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 150000004706 metal oxides Chemical class 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 241000256602 Isoptera Species 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 230000007547 defect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は各種形状の金属製品を製作する鋳造方法に関し
、特に、鋳巣やじケ等の不具合を防止して完全な鋳造物
を得る方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a casting method for manufacturing metal products of various shapes, and more particularly to a method for obtaining perfect castings while preventing defects such as cavities and splinters.
鋳造によって得られる鋳物は、鉄系や銅系やアルミニウ
ム光等多種の金属材料にわたり、形状や大きざあるいは
厚さ等あらゆる形状のものでも比較的簡単に製造するこ
とかでき、また、大量に製作する場合でおっても少量の
場合であっても適用することかできるために、各種機械
の主要構成物として最も広く用いられている。しかしな
がら鋳物は鍛造品等に比較すると機械的強度が低く、ま
た鋳造時に生じる鋳巣やじケ等の鋳物不良が発生しやす
く、その用途も限定を受けざるを得なかった。鋳巣やヒ
ケは、主に湯か冷却凝固する過程において湯の補充が充
分でなかったり押湯か不足することが原因となって生じ
る。Castings obtained by casting can be produced relatively easily from a variety of metal materials such as iron, copper, and aluminum, and can be made in any shape, size, or thickness, and can be produced in large quantities. It is most widely used as a main component of various machines because it can be applied even in small quantities. However, castings have lower mechanical strength than forged products, and are prone to casting defects such as cavities and splinters that occur during casting, so their uses have been limited. Blow holes and sink marks are mainly caused by insufficient replenishment of hot water during the process of cooling and solidifying hot water, or by insufficient riser metal.
従来の技術
湯の補充を充分に行なったり抑揚を確実に行なうために
従来は、押湯部を多数設けたり、押湯部の鋳型の砂の中
に多量の保温剤を混入せしめて湯が過早に凝固すること
を防止することか行なわれていた。Conventional technology In order to replenish the hot water sufficiently and to ensure the intonation, conventional techniques have been used to prevent hot water from overflowing by providing multiple feeders or mixing a large amount of heat insulating agent into the sand of the mold in the feeder. Efforts were made to prevent premature coagulation.
本発明か解決しようとする課題
上記従来のもの゛では鋳巣やじケ等の鋳物不良を完全I
LJ防止することかできなかった。これは、押湯部を多
数設けたり保温剤を混入しても、鋳物の形状や肉厚によ
っては押湯圧力か不足したり、湯か過早に凝固したりす
るためておる。また抑揚ロー力か不足するのは押湯の入
口部で場か過早に凝固して押湯圧力が内部の湯に確実に
伝達しないためでもおる。Problems to be solved by the present invention The conventional method described above completely eliminates casting defects such as cavities and jig.
I was unable to prevent LJ. This is because even if a large number of feeders are provided or a heat insulating agent is mixed, the feeder pressure may be insufficient or the hot water may solidify prematurely depending on the shape and wall thickness of the casting. The lack of intonation low force is also due to premature coagulation at the inlet of the riser, which prevents the pressure of the riser from being reliably transmitted to the hot water inside.
従って本発明の技術的課題は、湯口や押湯の入口部にお
いて湯か過早に冷却凝固することを防止して、どのよう
な鋳物の形状や肉厚でも鋳巣やiケが生じることのない
鋳造方法を提供することである。Therefore, the technical problem of the present invention is to prevent the hot water from prematurely cooling and solidifying at the sprue and riser inlet, and to prevent the formation of cavities and cracks in any casting shape or wall thickness. Our goal is to provide a unique casting method.
課題を解決するための手段
上記の技術的課題を解決するために講じた本発明の技術
的手段は、加熱溶解した金属を所望の型に流し込んで冷
却凝固せしめて鋳造物を造る方法において、注湯後に湯
口部あるいは押湯部にテルミット剤を添加する工程を含
むことを特徴とする。Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problems is a method of making a casting by pouring heated molten metal into a desired mold and cooling it to solidify it. It is characterized by including a step of adding a thermite agent to the sprue or riser after the hot water is poured.
作用
テルミット剤は金属酸化物とアルミニウムの粉末を混合
したもので、点火することによりテルミット反応を起し
大量の反応熱を発生する。注湯後にチルミツ1〜剤を湯
口部あるいは押湯部に添加することにより、テルミット
剤が)容湯によって点火され大量の反応熱を発生する。The active thermite agent is a mixture of metal oxide and aluminum powder, which causes a thermite reaction when ignited and generates a large amount of reaction heat. By adding Chirumitsu 1~ to the sprue or riser after pouring the hot water, the thermite agent is ignited by the hot water and generates a large amount of reaction heat.
従って、湯口部あるいは押湯部の溶湯には大量の熱か供
給される。Therefore, a large amount of heat is supplied to the molten metal at the sprue or riser.
発明の効果
本発明によれば湯口部必るいは押湯部の溶湯に大量の熱
が直接供給されるために、湯口部あるいは押湯部の溶湯
が過早に冷却凝固することがなく、押湯圧力の伝達が阻
害されることもなく、どのような鋳物の形状や肉厚であ
っても鋳巣やじケを生じることはない。Effects of the Invention According to the present invention, since a large amount of heat is directly supplied to the molten metal in the sprue or riser, the molten metal in the sprue or riser does not cool and solidify prematurely. The transmission of hot water pressure is not obstructed, and no matter what shape or wall thickness the casting is, no cavities will occur.
実施例 本発明の技術的手段の具体例を示す実施例を説明する。Example An example showing a specific example of the technical means of the present invention will be described.
第1図は鋳造を行なう状態を示したもので、上下の鋳型
1,2を型枠3で固定し、鋳型1,2の内部に中子4を
配置する。鋳型1,2に湯口部5と押湯部6,7を設け
る。鋳型1,2と中子4とでできた空間に湯口部5より
溶湯を注入して鋳造する。湯口部5から注入された)8
湯は湯道5aを通り中子4との空間に至り、押湯部6,
7へ押上かる。この場合、最初に注入された溶湯ヤ薄肉
部に至った湯から冷却凝固を始め、他の部分から楊をひ
く。そして厚肉部が最後に凝固しようとする時に湯が補
給されないと鋳巣やじケが生じることとなる。従来の鋳
造方法においては、この厚肉部が最後に凝固しようとす
る時に湯口部5や押湯部6.7から湯を補給したり圧力
をかけようとしても、湯口部5の狭部や押湯部6,7の
端部において一部湯が冷却凝固してしまい、充分に補給
や加圧ができなくて鋳巣やヒケが生じてしまうのでおる
。本発明においては、注湯後に湯口部5あるいは押湯部
6,7にテルミット剤9を添加する工程を含んだことに
より、テルミット剤9が溶湯によって点火してテルミッ
ト反応を起し大量の反応熱を発生するために湯口部5の
狭部や押湯部6,7の端部において溶湯が過早に冷却凝
固することがなく、湯の補給や押湯部からの加圧が確実
に行なわれ、鋳巣やヒケが生じることはない。FIG. 1 shows a state in which casting is carried out, in which upper and lower molds 1 and 2 are fixed with a mold frame 3, and a core 4 is placed inside the molds 1 and 2. Molds 1 and 2 are provided with sprue portions 5 and riser portions 6 and 7. Molten metal is poured into the space formed by the molds 1, 2 and the core 4 from the sprue 5 to perform casting. )8 injected from sprue part 5
The hot water passes through the runner 5a and reaches the space between the core 4 and the riser section 6,
Pushing up to 7. In this case, the first injected molten metal starts to cool and solidify when it reaches the thin wall part, and then the other parts are removed. If hot water is not replenished when the thick wall is finally about to solidify, cavities will occur. In the conventional casting method, when this thick part is finally about to solidify, even if you try to replenish hot water or apply pressure from the sprue part 5 or the riser part 6.7, the narrow part of the sprue part 5 or the riser part 6. Part of the molten metal at the ends of the molten metal parts 6 and 7 cools and solidifies, making it impossible to replenish or pressurize the molten metal sufficiently, resulting in cavities and sink marks. In the present invention, by including the step of adding the thermite agent 9 to the sprue part 5 or the feeder parts 6 and 7 after pouring, the thermite agent 9 is ignited by the molten metal, causing a thermite reaction, and a large amount of reaction heat is generated. In order to prevent the molten metal from prematurely cooling and solidifying in the narrow part of the sprue 5 and the ends of the feeder parts 6 and 7, the replenishment of hot water and the pressurization from the feeder parts are carried out reliably. , no cavities or sink marks occur.
第1図は本発明の鋳造方法の実施例を示す鋳造物の断面
図でおる。
1:上鋳型 2:下鋳型
:中子
5:湯口部
6゜
:押湯部
:テルミット剤FIG. 1 is a sectional view of a casting showing an embodiment of the casting method of the present invention. 1: Upper mold 2: Lower mold: Core 5: Sprue part 6°: Riser part: Thermite agent
Claims (1)
せしめて鋳造物を造る方法において、注湯後に湯口部あ
るいは押湯部にテルミット剤を添加する工程を含むこと
を特徴とする鋳造方法。1. A casting method in which heated and molten metal is poured into a desired mold and cooled and solidified to produce a casting, which includes the step of adding a thermite agent to the sprue or riser after pouring.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2245894A JPH04123862A (en) | 1990-09-14 | 1990-09-14 | Method for casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2245894A JPH04123862A (en) | 1990-09-14 | 1990-09-14 | Method for casting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04123862A true JPH04123862A (en) | 1992-04-23 |
Family
ID=17140400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2245894A Pending JPH04123862A (en) | 1990-09-14 | 1990-09-14 | Method for casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04123862A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104999036A (en) * | 2015-08-21 | 2015-10-28 | 广东富华铸锻有限公司 | Process for solving problem of shrinkage of differential housing castings |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54124825A (en) * | 1978-03-22 | 1979-09-28 | Aikoh Co | Warmth keeping of feeder head |
JPS5722850A (en) * | 1980-07-17 | 1982-02-05 | Takada Seikosho:Kk | Production of cast steel |
-
1990
- 1990-09-14 JP JP2245894A patent/JPH04123862A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54124825A (en) * | 1978-03-22 | 1979-09-28 | Aikoh Co | Warmth keeping of feeder head |
JPS5722850A (en) * | 1980-07-17 | 1982-02-05 | Takada Seikosho:Kk | Production of cast steel |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104999036A (en) * | 2015-08-21 | 2015-10-28 | 广东富华铸锻有限公司 | Process for solving problem of shrinkage of differential housing castings |
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