JPH0215869A - Manufacture of casting - Google Patents

Manufacture of casting

Info

Publication number
JPH0215869A
JPH0215869A JP16525788A JP16525788A JPH0215869A JP H0215869 A JPH0215869 A JP H0215869A JP 16525788 A JP16525788 A JP 16525788A JP 16525788 A JP16525788 A JP 16525788A JP H0215869 A JPH0215869 A JP H0215869A
Authority
JP
Japan
Prior art keywords
casting
core
runner
flash
water jacket
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.)
Granted
Application number
JP16525788A
Other languages
Japanese (ja)
Other versions
JP2653841B2 (en
Inventor
Shigetoshi Nakano
中野 重利
Masaaki Takeuchi
竹内 公明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP16525788A priority Critical patent/JP2653841B2/en
Publication of JPH0215869A publication Critical patent/JPH0215869A/en
Application granted granted Critical
Publication of JP2653841B2 publication Critical patent/JP2653841B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

PURPOSE:To perfectly break and remove casting fin together with runner part dy forming the casting fin around core and core print at the time of casting and connecting the casting fin with the runner part at a connecting part. CONSTITUTION:For example, at the time of casting a cylinder block, bore cores 21 for forming bores 11 and chamber 12, water jacket cores 22 for forming water jacket 13, side cores 24 at front and rear sides and head core 23 are assembled and set in the mold. Further, at end part of the water jacket core 22, the core print 31 is projected and fitted through a recessed part 32 and clearance S of the side cores 24. At the time of executing the casting with this constitution, the cylindrical casting fin 41 is formed with the clearance S, and the runner part 42 and the casting fin 41 are integratedly connected with the connecting part 43 formed with a passage 33. By this method, at the time of breaking and removing the runner part 42 from the arrow mark M direction, the casting fin 41 together with the connecting part, too can de perfectly and easily removed.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、シリンダブロック等の鋳物の製造方法に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing castings such as cylinder blocks.

(従来技術) 例えば、シリンダブロックのように複雑な中空部分を有
する鋳物を製造する場合、ボア中子、ウォータジャケッ
ト中子、サイド中子およびヘッド中子等の複数中子を組
み合わせて主型内に設置してなる鋳型により鋳造される
のが通例である。このような中子構成とする場合、中子
相互間あるいは中子と主型との連結部を、巾木と該巾木
を嵌合すべき凹部とからなる凹凸嵌合手段を介して結合
することが従来から多用されてきている(実開昭60−
56135号公報参照)。
(Prior art) For example, when manufacturing a casting with a complex hollow part such as a cylinder block, multiple cores such as a bore core, water jacket core, side core, and head core are combined into a main mold. It is customary to cast in a mold set up in In the case of such a core configuration, the connecting portions between the cores or between the core and the main mold are connected via a concave-convex fitting means consisting of a baseboard and a recess into which the baseboard is to be fitted. This has been frequently used since the beginning (1986-
(See Publication No. 56135).

(発明が解決しようとする課題) 上記の如き中子相互間あるいは中子と主型との結合構造
を採用する場合、巾木と凹部との凹凸嵌合時における両
者の嵌合位置合せを容易ならしめために、両者間に若干
のクリアランスを介在させることが一般的に行なわれて
いるが、該クリアランスの存在により、鋳造時に巾木ま
わりに鋳ばりが形成されることが多くなる。該鋳ぼりは
、極めて薄い形状を有しているところから、その完全除
去が難しく、鋳物仕上げ時4こ中空部分内方に残置され
るおそれがあり、鋳造品不良の原因となることがあった
。かかる鋳ばりの完全除去を容易に行い得るようにする
ことが鋳物製造上の重要な課題となってきている。
(Problem to be Solved by the Invention) When adopting the above-described bonding structure between the cores or between the core and the main mold, it is easy to align the baseboard and the recess when fitting the baseboard and the recess. Although it is common practice to provide a slight clearance between the two for smoothing, the presence of this clearance often results in the formation of flash around the baseboard during casting. Since the casting hole has an extremely thin shape, it is difficult to completely remove it, and there is a risk that it will be left inside the hollow part when finishing the casting, which may cause defects in the casting. . Enabling complete removal of such casting flash has become an important issue in the manufacturing of castings.

本発明は、上記の点に鑑みてなされたもので、l】木ま
わりにに形成される鋳ばりを湯道部の破断時に一堵に除
去し得るようにし、以って鋳ばりの完全除去を容易に行
わんとすることを目的とするものである。
The present invention has been made in view of the above points, and has the following features: 1) It is possible to remove the casting flash formed around the wood at once when the runner breaks, thereby completely removing the casting flash. The purpose is to facilitate the implementation of

(課題を解決するための方法) 本発明では、上記課題を解決するための方法として、鋳
造時において中子の巾木まわりに鋳ばりを形成するとと
もに、該鋳ばりと尚道部とを連結する連結部を形成し、
鋳物から湯道部を破断するに際して前記鋳ばりおよび連
結部を湯道部とともに除去するようにしている。
(Method for Solving the Problem) In the present invention, as a method for solving the above problem, a flash is formed around the baseboard of the core during casting, and the flash is connected to the straight path section. forming a connecting part;
When the runner part is broken from the casting, the flash and the connecting part are removed together with the runner part.

(作 用) 本発明方法では、上記した如く、巾木まわりに形成され
る鋳ばりと湯道部とを、鋳造時に同時形成される連結部
を介して連結したことにより、前記鋳ばりと鋳物との結
合関係よりも鋳ばりと連結部を介しての湯道部との結合
関係の方が強固となるところから、肩道部破断時におい
て鋳ばりが連結部とともに破断除去されることとなるの
である。
(Function) As described above, in the method of the present invention, the casting flash formed around the baseboard and the runner are connected via the connecting part formed at the same time during casting, so that the casting flash and the casting Since the connection between the flash and the runner through the joint is stronger than the connection between the flash and the joint, the flash will be broken and removed together with the joint when the shoulder ruptures. It is.

従って、鋳物からの鋳ばりの完全除去が極めて容易に行
なわれることとなるのである。
Therefore, it is extremely easy to completely remove flash from the casting.

(実施例) 以下、添付の図面に示す実施例に基づいて本発明の鋳物
の製造方法を説明する。
(Example) Hereinafter, a method for manufacturing a casting of the present invention will be described based on an example shown in the attached drawings.

本実施例においては、鋳物としてシリンダブロックlを
製造・する場合について説明する。
In this embodiment, a case will be described in which the cylinder block 1 is manufactured as a casting.

シリンダブロックlを鋳造するための鋳型内には、シリ
ンダブロックlのボアtt、tt・・およびチャンバー
12を形成するためのボア中子21と、前記ボア11.
11・・の周壁とウォータジャケット13.13を形成
するためのウォータジャケット中子22と、シリンダブ
ロックlの上面を形成するためのヘッド中子23と、シ
リンダブロックlのフロント面およびリヤ面を形成する
ためのフロントおよびリヤのサイド中子24.24とを
組付けたものがセットされる(第1図、第2図および第
4図参照)。
In the mold for casting the cylinder block l, a bore core 21 for forming the bores tt, tt, . . . and the chamber 12 of the cylinder block l;
A water jacket core 22 for forming the peripheral wall of 11... and a water jacket 13.13, a head core 23 for forming the upper surface of the cylinder block l, and a front surface and a rear surface of the cylinder block l. The front and rear side cores 24 and 24 are assembled (see FIGS. 1, 2, and 4).

上記の如き中子組立品においては、例えば、前記ウォー
タジャケット中子22とサイド中子24とは、第4図図
示の如く、ウォータジャケット中子22端部に突設され
た巾木31をサイド中子24の内面に形成された凹部3
2に嵌合せしめることによる凹凸嵌合により結合せしめ
られている。
In the core assembly as described above, for example, the water jacket core 22 and the side cores 24 have a baseboard 31 protruding from the end of the water jacket core 22 as shown in FIG. Recess 3 formed on the inner surface of core 24
2 and are connected by a concave-convex fitting.

この時、巾木31と凹部32との間には、嵌合時におけ
る位置合せ等を容易ならしめるために通常若干のクリア
ランスSが形成されるが、本実施例の場合、該クリアラ
ンスSを通常より稍大き目にとる。しかも、サイド中子
24には、前記クリアランスSと湯道34とを連通ずる
通路33.33が形成されている。
At this time, a slight clearance S is usually formed between the baseboard 31 and the recess 32 in order to facilitate positioning etc. during fitting, but in the case of this embodiment, the clearance S is normally Make it slightly larger. Furthermore, passages 33 and 33 are formed in the side core 24 to communicate the clearance S and the runner 34.

上記の如き中子組立品をセットしてなる鋳型によりシリ
ンダブロック1の鋳造を行うと、第1図ないし第3図図
示の如く、ウォータジャケット中子22の巾木31のま
わりに、前記クリアランスSに侵入した溶湯が凝固して
なる円筒状の鋳ばり41が形成されるとともに、湯道部
42と前記鋳ばり41との間には、前記通路33.33
に侵入した溶湯が凝固してなる連結部43.43が一体
に形成される。かくして得られたシリンダブロックlに
おいては、鋳ばり41とシリンダブロック1との結合関
係よりも、連結部43.43を介しての湯道部42と鋳
ばり41との結合関係の方が強固となっている。
When the cylinder block 1 is cast using a mold in which the core assembly as described above is set, the clearance S is formed around the baseboard 31 of the water jacket core 22, as shown in FIGS. 1 to 3. A cylindrical flash 41 is formed by the solidification of the molten metal that has entered the molten metal, and between the runner 42 and the flash 41, the passage 33, 33 is formed.
Connecting portions 43, 43 are integrally formed by solidifying the molten metal that has entered. In the cylinder block l thus obtained, the connection between the runner 42 and the flash 41 via the connecting portions 43 and 43 is stronger than the connection between the flash 41 and the cylinder block 1. It has become.

上記の如くして鋳造されたシリンダブロック1は、第1
図図示の如く、ハンマー(図示省略)等による矢印M方
向からの打撃により湯道部42の破断除去が行なわれる
が、この時、該湯道部42と連結部43.43を介して
強固に連結された鋳ぼり41も連結部43.43ととも
に破断除去されることとなり、シリンダブロックlから
の鋳ばり41の除去がほぼ完全に行なわれるのである。
The cylinder block 1 cast as described above has the first
As shown in the figure, the runner 42 is broken and removed by hitting it in the direction of arrow M with a hammer (not shown) or the like. The connected flash 41 is also broken and removed together with the connecting portions 43, 43, and the flash 41 is almost completely removed from the cylinder block l.

上記した如く、本発明方法によれば、湯道部42の破断
除去時に同時に鋳ばり41の除去も容易に行なわれるこ
ととなり、従来困難とされていた巾木まわりの鋳ばり4
1の除去が極めて容易に行えるのである。
As described above, according to the method of the present invention, the casting flash 41 can be easily removed at the same time as the runner section 42 is broken and removed.
1 can be removed extremely easily.

なお、本発明方法は、上記実施例のシリンダブロック鋳
造時に限らず、他の鋳造品にも適用可能なことは勿論で
ある。
Note that the method of the present invention is of course applicable not only to the casting of the cylinder block of the above embodiment, but also to other cast products.

(発明の効果) 取上の如く、本発明方法によれば、鋳造時において中子
の巾木まわりに鋳ばりを形成するとともに、該鋳ばりと
湯道部とを連結する連結部を形成し、鋳物から湯道部を
破断するに際して前記鋳ばりおよび連結部を湯道部とと
もに除去するようにしたので、前記鋳ばりと鋳物との結
合関係よりも鋳ばりと連結部を介しての尚道部との結合
関係の方が強固となるところから、湯道部破断時に・お
いて鋳ばりが連結部とともに破断除去されることとなり
、鋳物からの鋳ばりの完全除去を極めて容易に行なうこ
とができるという優れた効果がある。
(Effects of the Invention) As mentioned above, according to the method of the present invention, a flash is formed around the baseboard of the core during casting, and a connecting portion is formed to connect the flash and the runner. , when the runner part is broken from the casting, the flash and the connecting part are removed together with the runner part, so that the runner part is removed through the flash and the connecting part rather than the connection between the flash and the casting. Since the bonding relationship with the casting is stronger, the flash is broken and removed together with the connecting part when the runner breaks, making it extremely easy to completely remove the flash from the casting. This has an excellent effect.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明方法により製造される鋳物の具体例であ
るシリンダブロックの湯道部破断前の状態を示す斜視図
、第2図は第1図の■−■拡大断面図、第3図は第2図
の[1−[1部分断面図、第4図は第1図図示のシリン
ダブロックを鋳造するための鋳型内にセットされるべき
中子組立品の要部断面図である。 1・・・・・・・鋳物(シリンダブロック)22 ・ 24 ・ 3 l ・ 32 ・ 4 l ・ 42 ・ 43 ・ ウォータジャケラ ザイド中子 巾木 凹部 鋳ぼり 湯道部 連結部 ト中子 第3図 第4図
Fig. 1 is a perspective view showing the state of a cylinder block, which is a specific example of a casting manufactured by the method of the present invention, before the runner section is broken, Fig. 2 is an enlarged cross-sectional view taken along the line ■-■ of Fig. 1, and Fig. 3 2 is a partial sectional view taken along the line [1-[1], and FIG. 4 is a sectional view of a main part of a core assembly to be set in a mold for casting the cylinder block shown in FIG. 1. 1... Casting (cylinder block) 22 ・ 24 ・ 3 l ・ 32 ・ 4 l ・ 42 ・ 43 ・ Water jacket lazide core baseboard recess Casting hole runner connection part To core No. 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] 1、鋳造時において中子の巾木まわりに鋳ばりを形成す
るとともに、該鋳ばりと湯道部とを連結する連結部を形
成し、鋳物から湯道部を破断するに際して前記鋳ばりお
よび連結部を湯道部とともに除去することを特徴とする
鋳物の製造方法。
1. At the time of casting, a flash is formed around the baseboard of the core, and a connection part is formed to connect the flash and the runner, and when the runner is broken from the casting, the flash and the connection are removed. A method for manufacturing a casting, characterized in that the part is removed together with the runner part.
JP16525788A 1988-07-01 1988-07-01 Casting manufacturing method Expired - Lifetime JP2653841B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16525788A JP2653841B2 (en) 1988-07-01 1988-07-01 Casting manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16525788A JP2653841B2 (en) 1988-07-01 1988-07-01 Casting manufacturing method

Publications (2)

Publication Number Publication Date
JPH0215869A true JPH0215869A (en) 1990-01-19
JP2653841B2 JP2653841B2 (en) 1997-09-17

Family

ID=15808883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16525788A Expired - Lifetime JP2653841B2 (en) 1988-07-01 1988-07-01 Casting manufacturing method

Country Status (1)

Country Link
JP (1) JP2653841B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103736931A (en) * 2014-01-29 2014-04-23 广西玉柴机器股份有限公司 Casting mould of engine body of large in-line diesel engine
CN106111912A (en) * 2016-08-31 2016-11-16 广西玉柴机器股份有限公司 For casting the core group of integrated form Composite cylinder lid
CN106141095A (en) * 2016-08-31 2016-11-23 广西玉柴机器股份有限公司 The casting sand core group of integrated form Composite cylinder lid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103736931A (en) * 2014-01-29 2014-04-23 广西玉柴机器股份有限公司 Casting mould of engine body of large in-line diesel engine
CN106111912A (en) * 2016-08-31 2016-11-16 广西玉柴机器股份有限公司 For casting the core group of integrated form Composite cylinder lid
CN106141095A (en) * 2016-08-31 2016-11-23 广西玉柴机器股份有限公司 The casting sand core group of integrated form Composite cylinder lid

Also Published As

Publication number Publication date
JP2653841B2 (en) 1997-09-17

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