JPH05228577A - Structure of casting die for casting cylinder head in internal combusion engine - Google Patents

Structure of casting die for casting cylinder head in internal combusion engine

Info

Publication number
JPH05228577A
JPH05228577A JP4031040A JP3104092A JPH05228577A JP H05228577 A JPH05228577 A JP H05228577A JP 4031040 A JP4031040 A JP 4031040A JP 3104092 A JP3104092 A JP 3104092A JP H05228577 A JPH05228577 A JP H05228577A
Authority
JP
Japan
Prior art keywords
casting
cylinder head
valve mechanism
mechanism chamber
core
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
JP4031040A
Other languages
Japanese (ja)
Other versions
JP2992395B2 (en
Inventor
Ryuji Nakamura
竜二 中村
Hajime Fujita
一 藤田
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.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor Co Ltd
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 Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP4031040A priority Critical patent/JP2992395B2/en
Publication of JPH05228577A publication Critical patent/JPH05228577A/en
Application granted granted Critical
Publication of JP2992395B2 publication Critical patent/JP2992395B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To reduce the cost needed to manufacture an oil dropping hole by casting in the case of forming the oil dropping hole for flowing out lubricating oil stored in an inner bottom surface of a motive valve mechanism chamber in a cylinder head into a chain case as a hole as cast. CONSTITUTION:In a core mold E for chain case, a core part E1 for casting the oil dropping hole 17 is arranged so as to position the upper surface of the core part E1 at the position on the almost same plane as the inner bottom surface 2b in the motive valve mechanism chamber 2a or at the position at lower than the inner bottom surface 2b in the motive valve mechanism chamber 2a and the upper surface of this core part E1 is abutted on the lower surface D1 of a core mold D for the motive valve mechanism chamber.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、シリンダヘッドの上面
に、カム軸とを軸支して成る内燃機関において、そのシ
リンダヘッドを鋳造する場合における鋳造型に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting die for casting a cylinder head in an internal combustion engine in which a cam shaft is supported on the upper surface of the cylinder head.

【0002】[0002]

【従来の技術】従来、この内燃機関におけるシリンダヘ
ッドは、例えば、実開平1−142546号公報等に記
載されているように、吸気弁用カム軸及び排気弁用カム
軸の一端部を、シリンダヘッドの一端部に造形した軸受
け部に対して軸支し、この軸受け部の内側に、前記両カ
ム軸のうち一方のカム軸から他方のカム軸に動力伝達す
るための歯車列を配設する一方、前記シリンダヘッドに
は、前記軸受け部の外側に、クランク軸から前記一方の
カム軸に動力伝達するタイミングチエンを収容するチエ
ンケースを一体的に造形する構成にすると共に、前記軸
受け部に、前記シリンダヘッドの動弁機構室における内
底面と前記チエンケースとを連通するオイル落とし孔を
穿設して、前記動弁機構室内における潤滑油を、このオ
イル落とし孔から前記チエンケース内に流出したのち、
チエンケースを介して内燃機関の下部におけるオイルパ
ンに導くと言う構成にしている。
2. Description of the Related Art Conventionally, a cylinder head in an internal combustion engine has a cylinder head having one end portion of an intake valve cam shaft and one end portion of an exhaust valve cam shaft as disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 1-142546. The head is rotatably supported by a bearing portion formed at one end of the head, and a gear train for transmitting power from one of the cam shafts to the other cam shaft is disposed inside the bearing portion. On the other hand, in the cylinder head, a chain case for accommodating a timing chain for transmitting power from the crankshaft to the one cam shaft is integrally formed on the outside of the bearing portion, and the bearing portion is formed. An oil drop hole that communicates an inner bottom surface of the valve mechanism chamber of the cylinder head with the chain case is formed to allow the lubricating oil in the valve mechanism chamber to flow through the oil drop hole. After flowing out in the serial chain case,
The structure is such that the oil is guided to the oil pan in the lower part of the internal combustion engine via the chain case.

【0003】[0003]

【発明が解決しようとする課題】しかし、この種のシリ
ンダヘッドにおいて、両カム軸の端部を軸支する軸受け
部に穿設するオイル落とし孔を、シリンダヘッドの鋳造
に際して同時に鋳抜きによって形成する場合、従来の方
法によると、以下において詳しく述べるように、シリン
ダヘッドを鋳造にて製造する場合に要するコストが大幅
にアップすると言う問題があった。
However, in this type of cylinder head, the oil drop hole formed in the bearing portion that supports the ends of both cam shafts is formed by casting at the same time when the cylinder head is cast. In this case, according to the conventional method, as described in detail below, there is a problem that the cost required for manufacturing the cylinder head by casting is significantly increased.

【0004】本発明は、この問題を解消することができ
るようにした鋳造型の構造を提供することを技術的課題
とするものである。
The present invention has a technical problem to provide a casting mold structure capable of solving this problem.

【0005】[0005]

【課題を解決するための手段】この技術的的課題を達成
するため本発明は、上面における動弁機構室内に、カム
軸の軸端部を軸支する軸受け部を一体的に造形する一
方、この軸受け部の外側に、前記カム軸に対するタイミ
ングチエンに対するチエンカバーを一体的に造形して成
るシリンダヘッドを鋳造するようにした鋳物型におい
て、前記チエンケース用中子型に、前記動弁機構室内と
前記チエンケース内とを連通するオイル落とし孔の鋳抜
き用の中子部を、当該中子型の上面を前記動弁機構室に
おける内底面と略同一平面状の部位に位置するか、或い
は前記動弁機構室における内底面よりも低い部位に位置
して設けて、この中子部の上面を、前記動弁機構室用中
子型の下面に接当する構成にした。
In order to achieve this technical object, the present invention integrally forms a bearing portion for axially supporting a shaft end portion of a cam shaft in a valve mechanism chamber on an upper surface, In a casting mold for casting a cylinder head formed integrally with a chain cover for the timing chain with respect to the cam shaft on the outside of the bearing portion, the core mold for the chain case is provided with the valve mechanism chamber. The core portion for casting of the oil drop hole that communicates with the inside of the chain case, the upper surface of the core die is located in a substantially flat plane with the inner bottom surface of the valve mechanism chamber, or It is arranged at a position lower than the inner bottom surface of the valve mechanism chamber, and the upper surface of this core portion is in contact with the lower surface of the core mold for the valve mechanism chamber.

【0006】[0006]

【実施例】以下、本発明における実施例を、DOHC型
内燃機関用シリンダヘッドに適用した場合の図面につい
て説明する。図において符号1は、シリンダブロック
を、符号2は、前記シリンダブロック1の上面にシール
用ガスケット3を挟んで配設したアルミ合金鋳造製のシ
リンダヘッドを示し、該シリンダヘッド2は、各気筒の
左右両側に配設した複数本のヘッドボルト4にて、前記
シリンダブロック1に対して締結されている。
Embodiments of the present invention will be described below with reference to the drawings when applied to a cylinder head for a DOHC type internal combustion engine. In the figure, reference numeral 1 indicates a cylinder block, and reference numeral 2 indicates a cylinder head made of aluminum alloy casting, which is arranged on the upper surface of the cylinder block 1 with a sealing gasket 3 interposed therebetween. It is fastened to the cylinder block 1 by a plurality of head bolts 4 arranged on both left and right sides.

【0007】符号5は、吸気弁6に対するカム軸を、符
号7は、排気弁8に対するカム軸を各々示し、これら両
カム軸5,7は、前記シリンダヘッド2の上面における
動弁機構室2a内に平行に配設され、且つ、前記動弁機
構室2a内に一体的に造形した複数個の軸受け部9,1
0にて軸支されている、また、これら両カム軸5,7
は、前記各軸受け部9,10のうち両カム軸5,7の端
部に対する軸受け部9の内側に互いに噛合するよう配設
した歯車11,12にて互いに連動回転するように構成
されている。
Reference numeral 5 denotes a cam shaft for the intake valve 6, and reference numeral 7 denotes a cam shaft for the exhaust valve 8. Both of these cam shafts 5, 7 are the valve mechanism chamber 2a on the upper surface of the cylinder head 2. A plurality of bearing portions 9 and 1 which are arranged parallel to each other and integrally formed in the valve mechanism chamber 2a.
0, and both cam shafts 5, 7
Of the bearings 9 and 10 are configured to rotate in association with each other by gears 11 and 12 arranged so as to mesh with each other inside the bearings 9 with respect to the ends of the cam shafts 5 and 7. .

【0008】そして、前記シリンダヘッド2には、前記
各軸受け部9,10のうち両カム軸5,7の端部に対す
る軸受け部9より外側の部位に、チエンケース15を一
体的に造形する一方、前記排気弁用カム軸7をこのチエ
ンケース15内に突出して、その軸端部に嵌着したスプ
ロケット13に、クランク軸(図示せず)からのタイミ
ングチエン14を巻掛けする。
On the cylinder head 2, a chain case 15 is integrally formed on a portion of each of the bearing portions 9 and 10 outside the bearing portion 9 with respect to the ends of the cam shafts 5 and 7. The exhaust valve cam shaft 7 is projected into the chain case 15, and a timing chain 14 from a crank shaft (not shown) is wound around the sprocket 13 fitted to the shaft end portion thereof.

【0009】なお、前記シリンダヘッド2の上面におけ
る動弁機構室2aは、シリンダヘッド2に対して着脱自
在に締結したヘッドカバー16にて覆われている。一
方、前記シリンダヘッド2の動弁機構室2a内における
各軸受け部9,10のうち両カム軸5,7の端部に対す
る軸受け部9には、前記動弁機構室2aにおける内底面
2bと前記チエンケース15内とを連通するオイル落と
し孔17を、前記シリンダヘッド2の鋳造に際して、同
時に鋳抜き孔として形成することによって、前記動弁機
構室2a内における潤滑油を、このオイル落とし孔17
からチエンケース15内に流出したのち、チエンケース
15内を介して、前記シリンダブロック1の下面に締結
したオイルパン(図示せず)内に導くように構成する。
The valve mechanism chamber 2a on the upper surface of the cylinder head 2 is covered with a head cover 16 which is detachably fastened to the cylinder head 2. On the other hand, among the bearing portions 9 and 10 in the valve mechanism chamber 2a of the cylinder head 2, the bearing portion 9 for the end portions of both cam shafts 5 and 7 includes the inner bottom surface 2b and the inner bottom surface 2b in the valve mechanism chamber 2a. By forming the oil drop hole 17 communicating with the inside of the chain case 15 as a casting hole at the same time when the cylinder head 2 is cast, the lubricating oil in the valve operating mechanism chamber 2a is removed from this oil drop hole 17
After flowing out from the chain case 15 into the oil case (15), it is introduced into the oil pan (not shown) fastened to the lower surface of the cylinder block 1 through the chain case 15.

【0010】ところで、前記アルミ合金鋳造製のシリン
ダヘッド2は、図6に示すように、当該シリンダヘッド
2の上面を形成する上面鋳造型A、シリンダヘッド2の
下面を形成する下面鋳造型B、及びシリンダヘッド2の
側面を形成する側面鋳造型Cの内部に、シリンダヘッド
2における動弁機構室2aの内部を形成するための動弁
機構室用中子型D及び前記チエンケース15の内部を形
成するためのチエンケース用中子型Eを挿入し、これら
の間に形成されるキャビティー内に、アルミ合金を溶融
状態で注入することによって製造される。
By the way, as shown in FIG. 6, the aluminum alloy cast cylinder head 2 has an upper surface casting mold A which forms an upper surface of the cylinder head 2 and a lower surface casting mold B which forms a lower surface of the cylinder head 2. Further, inside the side face casting mold C forming the side face of the cylinder head 2, the valve operating mechanism chamber core die D for forming the inside of the valve operating mechanism chamber 2a in the cylinder head 2 and the inside of the chain case 15 are provided. It is manufactured by inserting a core die E for a chain case to be formed and injecting an aluminum alloy in a molten state into a cavity formed between them.

【0011】そして、この場合、従来は、図8に示すよ
うに、前記チエンケース用中子型Eに、前記オイル落と
し孔17を形成するための中子部E1 ′を、シリンダヘ
ッド2における動弁機構室2aの内底面2bよりも高い
部位に一体的に造形して、この中子部E1 ′を、前記動
弁機構室用中子型Dに形成した凹み部D1 内に挿入する
ことによって、オイル落とし孔17′を、鋳抜き孔とし
て形成すると言う方法を採用していた。
In this case, conventionally, as shown in FIG. 8, a core portion E 1 ′ for forming the oil drop hole 17 is formed in the cylinder head 2 in the chain case core die E. The core portion E 1 ′ is integrally molded at a position higher than the inner bottom surface 2 b of the valve mechanism chamber 2 a, and the core portion E 1 ′ is inserted into the recess D 1 formed in the core mold D for the valve mechanism chamber. By doing so, the oil drop hole 17 'is formed as a cast hole.

【0012】しかし、この従来のように、オイル落とし
孔鋳抜き用の中子部E1 ′を、動弁機構室2aにおける
内底面2bよりも高い部位に設けて、この中子部E1
を、動弁機構室用中子型Dの下面に形成した凹み部
1 ′内に挿入することによって、オイル落とし孔1
7′を鋳抜き孔として形成するように構成すると、アル
ミ合金の溶湯が、前記中子部E1 ′と凹み部D1 ′との
間に侵入することによって、軸受け部9と動弁機構2a
の内底面2bとの間に、図9に示すように、前記動弁機
構室2aにおける内底面2bから上向きに突出する形態
のアーチ状のバリF′が発生する場合がある。
However, as in the prior art, the core portion E 1 ′ for oil drop hole casting is provided at a position higher than the inner bottom surface 2 b of the valve mechanism chamber 2 a, and the core portion E 1 ′ is provided.
Is inserted into a recess D 1 ′ formed on the lower surface of the valve operating mechanism chamber core die D, so that the oil drop hole 1
If the structure is such that 7'is formed as a casting hole, the molten aluminum alloy enters between the core portion E 1 'and the recessed portion D 1 ', so that the bearing portion 9 and the valve operating mechanism 2a are formed.
As shown in FIG. 9, an arc-shaped burr F'of a shape protruding upward from the inner bottom surface 2b in the valve mechanism chamber 2a may occur between the inner bottom surface 2b and the inner bottom surface 2b.

【0013】そこで、シリンダヘッド2の鋳造後におい
て、前記アーチ状のバリF′を、ポンチG等によって打
ち破るとしても、動弁機構室2aの内底面2bには、図
10に示すように、前記アーチ状バリF′の一部が、適
宜高さのHのバリ片F1 ′として残り、この適宜高さH
の残留バリ片F1 ′が、動弁機構室2aの内底面2bか
らチエンケース15内への潤滑油の流れを堰き止めるこ
とになるから、前記内底面2bに溜まる潤滑油の全てを
流出することができないと言う事態が発生する。
Therefore, even if the arch-shaped burr F'is crushed by the punch G or the like after the cylinder head 2 is cast, the inner bottom surface 2b of the valve operating mechanism chamber 2a is, as shown in FIG. A part of the arch-shaped burr F ′ remains as a burr piece F 1 ′ of H having an appropriate height, and the height H is appropriately set.
Since the residual burr piece F 1 ′ of the above block the flow of the lubricating oil from the inner bottom surface 2b of the valve mechanism chamber 2a into the chain case 15, all the lubricating oil accumulated on the inner bottom surface 2b flows out. The situation occurs that you cannot do it.

【0014】従って、前記アーチ状のバリF′は、タガ
ネ等の工具によってその全て切除するようにしなければ
ならず、これに多大の手数と時間とを必要するから、シ
リンダヘッド2を鋳造によって製造するときのコストが
大幅にアップすると言う問題があった。本発明は、この
問題を解消するものであって、図6に示すように、チエ
ンケース用中子型Eに一体的に造形するオイル落とし孔
用中子部E1 を、当該オイル落とし孔用中子部E1 の上
面を動弁機構室2aにおける内底面2bと略同一平面状
の部位に位置するか、或いは前記動弁機構室2aにおけ
る内底面2bよりも低い部位に位置して設けて、このオ
イル落とし孔用中子部E1 の上面を、動弁機構室用中子
型Dの下面D1 に対して接当するように構成する。
Therefore, all the arch-shaped burrs F'must be cut off with a tool such as a chisel, which requires a great deal of labor and time, so that the cylinder head 2 is manufactured by casting. There was a problem that the cost when doing was significantly increased. The present invention solves this problem, and as shown in FIG. 6, an oil drop hole core portion E 1 formed integrally with a chain case core die E is used for the oil drop hole. The upper surface of the core part E 1 is located in a position substantially flush with the inner bottom surface 2b of the valve mechanism chamber 2a, or is positioned lower than the inner bottom surface 2b of the valve mechanism chamber 2a. The upper surface of the oil drop hole core portion E 1 is configured to abut against the lower surface D 1 of the valve operating mechanism chamber core die D.

【0015】このように構成すると、シリンダヘッド2
の鋳造に際して、アルミ合金の溶湯が、前記中子部E1
の上面と動弁機構室用中子型Dの下面D1 との間に侵入
することによって、軸受け部9と動弁機構2aの内底面
2bとの間に、バリFが発生する場合があっても、この
バリFは、図7に示すように、動弁機構室2aの内底面
2bと略同一平面状の平面板の形態になるか、或いは、
前記内底面2bから下向きに窪んだ形態になる。
With this structure, the cylinder head 2
During the casting of molten aluminum alloy, the core part E 1
There is a case where burrs F are generated between the bearing portion 9 and the inner bottom surface 2b of the valve mechanism 2a by invading between the upper surface of the valve mechanism 2 and the lower surface D 1 of the valve mechanism mechanism core D. However, as shown in FIG. 7, the burr F is in the form of a flat plate that is substantially coplanar with the inner bottom surface 2b of the valve operating mechanism chamber 2a, or
The inner surface 2b is recessed downward.

【0016】従って、鋳造に際して、前記のようにバリ
Fが発生した場合には、このバリFに対して、ポンチG
にて打ち抜く等することによって、孔を明けるだけで、
当該バリFにおける残部が従来のように潤滑油の流れを
堰き止める堰になることがなく、前記動弁機構室2aの
内底面2bに溜まる潤滑油の全てを、チエンケース15
内に流出できる状態にすることができるのであり、前記
従来のように、鋳造に際して発生するバリの全てを切除
することを必要としないから、シリンダヘッド2を鋳造
によって製造するときに要するコストを確実に低減でき
るのである。
Therefore, when the burr F is generated during casting as described above, the punch G is pressed against the burr F.
Just punch a hole by punching with
The remaining portion of the burr F does not become a weir that blocks the flow of the lubricating oil unlike the conventional case, and all of the lubricating oil accumulated on the inner bottom surface 2b of the valve mechanism chamber 2a is stored in the chain case 15.
Since it is not necessary to cut out all the burrs generated during casting as in the conventional case, it is possible to ensure that the cost required when manufacturing the cylinder head 2 by casting is ensured. It can be reduced to

【0017】なお、前記実施例はDOHC型内燃機関代
シリンダヘッドに適用した場合について説明したが、本
発明はこれに限らず、シリンダヘッドの上面にカム軸を
軸支したものであれば、他の形成の内燃機関用シリンダ
ヘッドにも適用できることは言うまでもない。
The above embodiment has been described for the case of being applied to a DOHC type internal combustion engine cylinder head, but the present invention is not limited to this, as long as a cam shaft is rotatably supported on the upper surface of the cylinder head. It goes without saying that the invention can also be applied to a cylinder head for an internal combustion engine having the above structure.

【0018】[0018]

【発明の作用・効果】本発明は、以上のように、オイル
落とし孔の鋳抜き用の中子部を、当該中子型の上面を前
記動弁機構室における内底面と略同一平面状の部位に位
置するか、或いは前記動弁機構室における内底面よりも
低い部位に位置して設けて、この中子部の上面を、前記
動弁機構室用中子型の下面に接当したことにより、シリ
ンダヘッドの鋳造に際して、前記中子部の上面と前記動
弁機構室用中子型の下面との間にバリが発生することが
あっても、このバリに孔を明けるだけで、前記動弁機構
室の内底面に溜まる潤滑油の全てをチエンケースに流出
するようにすることができ、前記バリの全てを完全に切
除することを必要しないから、シリンダヘッドを鋳造に
よって製造することに要するコストを大幅に低減できる
効果を有する。
As described above, according to the present invention, the core portion for casting the oil drop hole is formed so that the upper surface of the core mold is substantially flush with the inner bottom surface of the valve mechanism chamber. Located at a portion or lower than the inner bottom surface of the valve mechanism chamber, and the upper surface of this core portion is abutted to the lower surface of the valve mechanism chamber core die. Therefore, even if a burr may be formed between the upper surface of the core portion and the lower surface of the valve operating mechanism chamber core die during the casting of the cylinder head, it is possible to simply form a hole in the burr. Since it is possible to make all of the lubricating oil accumulated on the inner bottom surface of the valve mechanism chamber flow out to the chain case, and it is not necessary to completely cut out all of the burr, it is necessary to manufacture the cylinder head by casting. This has the effect of significantly reducing the cost required.

【図面の簡単な説明】[Brief description of drawings]

【図1】シリンダヘッドの平面図である。FIG. 1 is a plan view of a cylinder head.

【図2】図1のII−II視断面図である。FIG. 2 is a sectional view taken along line II-II of FIG.

【図3】図1のIII −III 視断面図である。FIG. 3 is a sectional view taken along line III-III in FIG.

【図4】図1のIV−IV視断面図である。4 is a sectional view taken along line IV-IV in FIG.

【図5】図1のV−V視断面図である。5 is a cross-sectional view taken along line VV of FIG.

【図6】本発明の実施例による鋳造型の要部を示す縦断
正面図である。
FIG. 6 is a vertical sectional front view showing a main part of a casting mold according to an embodiment of the present invention.

【図7】鋳造後におけるシリンダヘッドの要部を示す断
面図である。
FIG. 7 is a sectional view showing a main part of a cylinder head after casting.

【図8】従来における鋳造型の要部を示す縦断正面図で
ある。
FIG. 8 is a vertical sectional front view showing a main part of a conventional casting mold.

【図9】従来の鋳造型にて鋳造したシリンダヘッドの要
部を示す断面図である。
FIG. 9 is a cross-sectional view showing a main part of a cylinder head cast by a conventional casting die.

【図10】従来の鋳造型にて鋳造したシリンダヘッドに
おけるバリに孔を明けた状態の断面図である。
FIG. 10 is a cross-sectional view showing a state in which a hole is formed in a burr in a cylinder head cast by a conventional casting die.

【符号の説明】[Explanation of symbols]

2 シリンダヘッド 2a 動弁機構室 2b 動弁機構室の内底面 5,7 カム軸 9 軸受け部 14 タイミングチエン 15 チエンケース 17 オイル落とし孔 A 上面鋳物型 B 下面鋳物型 C 側面鋳物型 D 動弁機構室用中子型 D1 動弁機構室用中子型の下面 E チエンケース用中子型 E1 オイル落とし孔用中子部 F バリ2 Cylinder head 2a Valve operating chamber 2b Inner bottom surface of valve operating chamber 5,7 Cam shaft 9 Bearing 14 Timing chain 15 Chain case 17 Oil drop hole A Top casting type B Bottom casting type C Side casting type D Valve mechanism Chamber core type D 1 valve mechanism Underside of chamber core type E Core box for chain case E 1 Core part for oil drop hole F Burr

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】上面における動弁機構室内に、カム軸の軸
端部を軸支する軸受け部を一体的に造形する一方、この
軸受け部の外側に、前記カム軸に対するタイミングチエ
ンに対するチエンカバーを一体的に造形して成るシリン
ダヘッドを鋳造するようにした鋳物型において、前記チ
エンケース用中子型に、前記動弁機構室内と前記チエン
ケース内とを連通するオイル落とし孔の鋳抜き用の中子
部を、当該中子型の上面を前記動弁機構室における内底
面と略同一平面状の部位に位置するか、或いは前記動弁
機構室における内底面よりも低い部位に位置して設け
て、この中子部の上面を、前記動弁機構室用中子型の下
面に接当したことを特徴とする内燃機関におけるシリン
ダヘッドの鋳造用鋳物型の構造。
1. A bearing portion for axially supporting a shaft end portion of a cam shaft is integrally formed in a valve mechanism chamber on an upper surface, and a chain cover for a timing chain for the cam shaft is provided outside the bearing portion. In a casting mold for casting a cylinder head integrally formed, a casting die for an oil drop hole that communicates the valve operating chamber and the inside of the chain case with the core die for the chain case. The core part is provided such that the upper surface of the core type is located at a position substantially flush with the inner bottom surface of the valve mechanism chamber or at a position lower than the inner bottom surface of the valve mechanism chamber. The structure of a casting mold for casting a cylinder head in an internal combustion engine is characterized in that the upper surface of the core portion is brought into contact with the lower surface of the core mold for the valve mechanism mechanism chamber.
JP4031040A 1992-02-18 1992-02-18 Structure of casting mold for cylinder head casting in internal combustion engine Expired - Fee Related JP2992395B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4031040A JP2992395B2 (en) 1992-02-18 1992-02-18 Structure of casting mold for cylinder head casting in internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4031040A JP2992395B2 (en) 1992-02-18 1992-02-18 Structure of casting mold for cylinder head casting in internal combustion engine

Publications (2)

Publication Number Publication Date
JPH05228577A true JPH05228577A (en) 1993-09-07
JP2992395B2 JP2992395B2 (en) 1999-12-20

Family

ID=12320375

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4031040A Expired - Fee Related JP2992395B2 (en) 1992-02-18 1992-02-18 Structure of casting mold for cylinder head casting in internal combustion engine

Country Status (1)

Country Link
JP (1) JP2992395B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2161145A1 (en) * 1999-06-22 2001-11-16 C D S S R L Silk screen printer grating terminal supports former die consists of a sectional annular chamber with metal support frames and elastic bonding material
CN102806317A (en) * 2012-08-13 2012-12-05 南车戚墅堰机车有限公司 Casting method of locomotive diesel engine body
CN107035679A (en) * 2017-06-12 2017-08-11 南通华东油压科技有限公司 A kind of Vehicle loaded pump valve body moulding

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2161145A1 (en) * 1999-06-22 2001-11-16 C D S S R L Silk screen printer grating terminal supports former die consists of a sectional annular chamber with metal support frames and elastic bonding material
CN102806317A (en) * 2012-08-13 2012-12-05 南车戚墅堰机车有限公司 Casting method of locomotive diesel engine body
CN107035679A (en) * 2017-06-12 2017-08-11 南通华东油压科技有限公司 A kind of Vehicle loaded pump valve body moulding

Also Published As

Publication number Publication date
JP2992395B2 (en) 1999-12-20

Similar Documents

Publication Publication Date Title
JPH088287Y2 (en) Cylinder head for DOHC 4-valve internal combustion engine
US3895868A (en) Structure of internal combustion engines
JPS649446B2 (en)
JP2007309271A (en) Piston for internal combustion engine
JPH05228577A (en) Structure of casting die for casting cylinder head in internal combusion engine
JP2007321692A (en) Cooling structure for internal combustion engine
US5148782A (en) Casing of a trunk piston internal combustion engine
JPS61175212A (en) Lubricating oil return passage device in internal-combustion engine
EP0657234B1 (en) Mold for casting a laterally central portion of an engine block
JP2004316556A (en) Crankcase of multiple cylinder engine
JP3140632B2 (en) Structure of cylinder head in internal combustion engine
JP2566683B2 (en) V-type engine cylinder block structure
JPS6212812Y2 (en)
JPS63238944A (en) Core for casting cylinder head in internal combustion engine
JP2523326B2 (en) OHC Engine Cylinder-Head
JPH0138279Y2 (en)
JP3701935B2 (en) Oil pan structure in the engine
JPS6318743Y2 (en)
JP2004116460A (en) Cylinder head and molding die for molding cylinder head
JP3388109B2 (en) Oil pan structure in engine
JP2544959Y2 (en) Cylinder head structure of internal combustion engine
JPH04136459A (en) Cylinder block structure of v-type engine
JPH10122041A (en) Vehicle engine
JP2546615Y2 (en) Cam lubrication device for DOHC engine
KR100284416B1 (en) Cooling device of air-cooled internal combustion engine

Legal Events

Date Code Title Description
FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081015

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101015

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111015

Year of fee payment: 12

LAPS Cancellation because of no payment of annual fees