JPS6338258B2 - - Google Patents
Info
- Publication number
- JPS6338258B2 JPS6338258B2 JP26817484A JP26817484A JPS6338258B2 JP S6338258 B2 JPS6338258 B2 JP S6338258B2 JP 26817484 A JP26817484 A JP 26817484A JP 26817484 A JP26817484 A JP 26817484A JP S6338258 B2 JPS6338258 B2 JP S6338258B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- core
- siamese
- cylinder barrel
- molten metal
- 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.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 238000005266 casting Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 description 46
- 239000002184 metal Substances 0.000 description 46
- 238000000465 moulding Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 7
- 230000002265 prevention Effects 0.000 description 7
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/108—Siamese-type cylinders, i.e. cylinders cast together
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
- B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1816—Number of cylinders four
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
Ａ 発明の目的
(1) 産業上の利用分野
本発明は、サイアミーズ型シリンダブロツク素
材、特に複数のシリンダバレルを結合してなるサ
イアミーズシリンダバレルと；該サイアミーズシ
リンダバレルを囲繞するシリンダブロツク外壁
と；前記サイアミーズシリンダバレルと前記シリ
ンダブロツク外壁間に、該サイアミーズシリンダ
バレル全周が臨むように設けられた水ジヤケツト
と；前記シリンダブロツク外壁と前記サイアミー
ズシリンダバレルとを、前記水ジヤケツトにおけ
るシリンダヘツド側の開口部で連結する複数の補
強デツキ部と；を備え、前記補強デツキ部はシリ
ンダバレル配列方向と直交する各シリンダバレル
直径の延長線上で各シリンダバレルを挟むように
配設されているものの製造方法に関する。Detailed Description of the Invention A. Object of the Invention (1) Industrial Application Field The present invention relates to a Siamese cylinder block material, particularly a Siamese cylinder barrel formed by joining a plurality of cylinder barrels; a water jacket provided between the Siamese cylinder barrel and the cylinder block outer wall so that the entire circumference of the Siamese cylinder barrel faces; a plurality of reinforcing deck portions connected at openings on the cylinder head side; the reinforcing deck portions are arranged so as to sandwich each cylinder barrel on an extension line of the diameter of each cylinder barrel perpendicular to the cylinder barrel arrangement direction. related to the manufacturing method of the product.
(2) 従来の技術
本出願人は、先に前記構成のサイアミーズ型シ
リンダブロツク素材鋳造時に、金型に設けられた
中子部を用いて水ジヤケツトを形成する方法を開
発している。(2) Prior Art The present applicant has previously developed a method of forming a water jacket using a core provided in a mold during casting of a Siamese type cylinder block material having the above structure.
(3) 発明が解決しようとする問題点
しかしながら前記方法によると、水ジヤケツト
における各補強デツキ部から各シリンダバレルの
母線方向に延びる部分を、各シリンダバレルの半
径方向に進退する中子部により形成するためそれ
ら中子部によりシリンダブロツク外壁に複数の開
口部が形成される。したがつてそれら開口部を水
密に閉鎖しなければならず、部品および工数の増
加を招くことになる。(3) Problems to be Solved by the Invention However, according to the above method, the portion of the water jacket extending from each reinforcing deck portion in the generatrix direction of each cylinder barrel is formed by a core portion that moves forward and backward in the radial direction of each cylinder barrel. Therefore, a plurality of openings are formed in the outer wall of the cylinder block by the core portions. Therefore, these openings must be closed watertight, which increases the number of parts and man-hours.
本発明は上記に鑑み、可崩壊性中子を用いて水
ジヤケツトを形成し、また中子形成材料を水ジヤ
ケツトの開口部を利用して排出し、これによりシ
リンダブロツク外壁に全く開口部を持たないサイ
アミーズ型シリンダブロツク素材を得ることので
きる前記製造方法を提供することを目的とする。 In view of the above, the present invention forms a water jacket using a collapsible core, and discharges the core forming material using an opening in the water jacket, thereby eliminating the need for any openings in the outer wall of the cylinder block. It is an object of the present invention to provide the above-mentioned manufacturing method, which makes it possible to obtain a Siamese-type cylinder block material with no oxidation.
Ｂ 発明の構成
(1) 問題点を解決するための手段
本発明は、各補強デツキ部に対応する位置に欠
如部を有する筒状水ジヤケツト用可崩壊性中子を
用いて鋳造することにより、該中子の内側に前記
サイアミーズシリンダバレルを、また該中子の外
側に前記シリンダブロツク外壁を、さらに各欠如
部の位置に各補強デツキ部をそれぞれ成形して、
前記水ジヤケツトの開口部に前記中子の端面を露
出させた鋳造体を得る工程と；前記鋳造体中の前
記中子を崩壊して前記水ジヤケツトの開口部より
中子形成材料を排出する工程と；を用いることを
特徴とする。B. Structure of the Invention (1) Means for Solving Problems The present invention achieves the following steps by casting using a collapsible core for a cylindrical water jacket that has a cutout at a position corresponding to each reinforcing deck portion. The Siamese cylinder barrel is molded inside the core, the cylinder block outer wall is molded outside the core, and each reinforcing deck part is molded at the position of each cutout,
A step of obtaining a cast body in which the end face of the core is exposed at the opening of the water jacket; A step of collapsing the core in the cast body and discharging the core forming material from the opening of the water jacket. It is characterized by the use of and;
(2) 作 用
水ジヤケツトの開口部は各補強デツキ部により
部分的に遮られているだけであるから広い開口面
積が残されており、したがつてその開口部を通じ
て中子形成材料が鋳造体より排出される。(2) Function Since the opening of the water jacket is only partially blocked by each reinforcing deck part, a wide opening area remains, and the core forming material flows through the opening into the casting. more excreted.
(3) 実施例
第１〜第３図は本発明により得られたサイアミ
ーズ型シリンダブロツク素材Smを示し、その素
材Smは下記のように構成される。(3) Examples Figures 1 to 3 show a Siamese type cylinder block material Sm obtained by the present invention, and the material Sm is constructed as follows.
即ち、サイアミーズシリンダバレル１は複数、
図示例は４個のシリンダバレル１1〜１4を結合し
てなり、そのサイアミーズシリンダバレル１はシ
リンダブロツク外壁４により囲繞される。シリン
ダブロツク外壁４の下縁にはクランクケース５が
連設されている。サイアミーズシリンダバレル１
とシリンダブロツク外壁４間には、サイアミーズ
シリンダバレル全周が臨む水ジヤケツト６が設け
られる。各シリンダボア３ａは各シリンダバレル
１1〜１4の鋳ぐるみ材である鋳鉄製スリーブ３に
より形成される。 That is, the Siamese cylinder barrel 1 has a plurality of
In the illustrated example, four cylinder barrels 1 1 to 1 4 are combined, and the Siamese cylinder barrel 1 is surrounded by an outer wall 4 of the cylinder block. A crankcase 5 is connected to the lower edge of the cylinder block outer wall 4. Siamese cylinder barrel 1
A water jacket 6 is provided between the cylinder block outer wall 4 and the cylinder block outer wall 4, and the entire circumference of the Siamese cylinder barrel is exposed to the water jacket 6. Each cylinder bore 3a is formed by a cast iron sleeve 3 which is a casting material for each cylinder barrel 11 to 14 .
水ジヤケツト６の開口部６ａにおいて、シリン
ダブロツク外壁４とサイアミーズシリンダバレル
１とは、各シリンダバレル１1〜１4について各一
対の補強デツキ部８のみにより連結され、これに
よりシリンダブロツク素材Ｓはクローズドデツキ
型に構成される。各一対の補強デツキ部８はシリ
ンダバレル配列方向と直交する各シリンダバレル
直径の延長線上で各シリンダバレル１1〜１4を挟
むように配列されている。また各補強デツキ部８
のシリンダバレル配列方向幅ｗは、剛性確保のた
めに各シリンダバレル１1〜１4の肉厚ｔよりも広
く設定されている（即ち、ｗ＞ｔ）。 At the opening 6a of the water jacket 6, the cylinder block outer wall 4 and the Siamese cylinder barrel 1 are connected only by a pair of reinforcing deck portions 8 for each cylinder barrel 11 to 14 , so that the cylinder block material S is closed. It is configured in a deck type. Each pair of reinforcing deck portions 8 are arranged so as to sandwich each cylinder barrel 1 1 to 1 4 on an extension line of each cylinder barrel diameter orthogonal to the cylinder barrel arrangement direction. In addition, each reinforcing deck part 8
The width w in the cylinder barrel arrangement direction is set wider than the wall thickness t of each cylinder barrel 1 1 to 1 4 to ensure rigidity (that is, w>t).
このように構成すると、エンジン運転中におい
てピストンのサイドスラストが各シリンダバレル
１1〜１4に作用した場合、それは各補強デツキ部
８により支承されるので各シリンダボア３ａの変
形が抑制される。 With this configuration, when the side thrust of the piston acts on each cylinder barrel 1 1 to 1 4 during engine operation, it is supported by each reinforcing deck portion 8, so that deformation of each cylinder bore 3a is suppressed.
第５〜第９図は、第４図に示すシリンダブロツ
ク素材用鋳造体Csを得るための鋳造装置を示し、
その装置は金型Ｍを備え、その金型Ｍは昇降自在
な上型９と、その上型９の下方に配設され、第
５、第６図において左右二つ割の第１および第２
側型１０1，１０2ならびに第７図において、左右
二つ割の第３および第４側型１０3，１０4と、各
側型１０1〜１０4を摺動自在に載置する下型１１
とより構成される。 5 to 9 show a casting apparatus for obtaining the cast body Cs for cylinder block material shown in FIG. 4,
The device is equipped with a mold M, which includes an upper mold 9 that can be raised and lowered, and a first and second mold that is divided into left and right halves, and is disposed below the upper mold 9.
In FIG. 7, the side molds 10 1 and 10 2 and the third and fourth side molds 10 3 and 10 4 divided into left and right halves, and a lower mold on which the side molds 10 1 to 10 4 are slidably placed. 11
It consists of
上型９の下面には、各側型１０1〜１０4の上半
部と協働してサイアミーズシリンダバレル１およ
びシリンダブロツク外壁４を成形するための第１
キヤビテイC1を画成する型締め用凹部１２が形
成され、その凹部１２と嵌合する型締め用凸部１
３が各側型１０1〜１０4の上面に突設される。 On the lower surface of the upper mold 9, there is a first mold for molding the Siamese cylinder barrel 1 and the cylinder block outer wall 4 in cooperation with the upper half of each side mold 10 1 to 10 4 .
A mold-clamping recess 12 defining a cavity C 1 is formed, and a mold-clamping convex 1 that fits into the mold-clamping recess 12 is formed.
3 is provided protrudingly from the upper surface of each side mold 10 1 to 10 4 .
第７、第８図に示すように、下型１１には溶解
炉（図示せず）よりアルミニウム合金よりなる溶
湯を受ける湯溜部１４と、その湯溜部１４に連通
する給湯シリンダ１５と、その給湯シリンダ１５
に摺合されるプランジヤ１６と、湯溜部１４より
２本に分岐して第１キヤビテイC1の長手方向に、
且つそれと略同一長さに亘つて延びる一対の湯道
１７とが設けられる。また下型１１は両湯道１７
間において上方へ突出する成形ブロツク１８を有
し、その成形ブロツク１８は各側型１０1，１０2
の下半部と協働してクランクケース５を成形する
ための第２キヤビテイC2を画成する。そのキヤ
ビテイC2の上端は前記第１キヤビテイC1に連通
し、また両側の下端は両湯道１７に複数の堰１９
を介して連通する。 As shown in FIGS. 7 and 8, the lower mold 11 includes a sump 14 that receives molten metal made of aluminum alloy from a melting furnace (not shown), and a hot water supply cylinder 15 that communicates with the sump 14. The hot water cylinder 15
The plunger 16 slides into the plunger 16, and the first cavity C1 branches into two parts from the sump 14 in the longitudinal direction of the first cavity C1 .
In addition, a pair of runners 17 are provided that extend over approximately the same length. In addition, the lower mold 11 has both runners 17
There is a molding block 18 projecting upwardly between the molds 10 1 , 10 2 on each side.
A second cavity C2 for forming the crankcase 5 is defined in cooperation with the lower half of the crankcase. The upper end of the cavity C 2 communicates with the first cavity C 1 , and the lower ends on both sides have a plurality of weirs 19 connected to both runners 17 .
communicate via.
成形ブロツク１８は、所定の間隔で形成された
背の高い４個のかまぼこ形第１成形部１８1と、
相隣る第１成形部１８1間および最外側の両第１
成形部１８1の外側に位置する凸字形第２成形部
１８2とよりなり、各第１成形部１８1はクランク
ピンおよびクランクアーム用回転空間２０（第
２、第３図）を成形するために用いられ、第２成
形部１８2はクランクジヤーナルの軸受ホルダ２
１（第２、第３図）を成形するために用いられ
る。各堰１９は各第２成形部１８2に対応して設
けられており、第２キヤビテイC2の容量の大き
な部分に溶湯を早期に充填するようになつてい
る。 The molding block 18 includes four tall semi-cylindrical first molding parts 181 formed at predetermined intervals;
Between adjacent first molded parts 18 1 and both outermost first molded parts 18 1
It consists of a convex second molding part 182 located outside the molding part 181, and each first molding part 181 is for molding a rotation space 20 for a crank pin and a crank arm (FIGS. 2 and 3). The second molded part 18 2 is used for the bearing holder 2 of the crank journal.
1 (Figures 2 and 3). Each weir 19 is provided corresponding to each second forming part 18 2 , and is designed to quickly fill the large volume portion of the second cavity C 2 with molten metal.
両湯道１７の断面積が湯溜部１４側より湯道先
１７ａに向けて段階的に減少するように、湯道１
７底面は湯溜部１４側より数段の上り階段状に形
成されている。各段部１７ｂに連なる各立上がり
部１７ｃは溶湯を各堰１９にスムーズに導くこと
ができるように斜めに形成される。 The runners 17 are arranged such that the cross-sectional area of both runners 17 gradually decreases from the water reservoir 14 side toward the runner tip 17a.
The bottom surface of 7 is formed in the shape of several steps ascending from the trough portion 14 side. Each rising portion 17c connected to each step portion 17b is formed diagonally so that the molten metal can be smoothly guided to each weir 19.
このように湯道１７の断面積を段階的に減少さ
せると、断面積の大きな部分では大量の溶湯を遅
い速度で堰１９を通じて第２キヤビテイC2に充
填し、また断面積の小さな部分では少量の溶湯を
速い速度で堰１９を通じて第２キヤビテイC2に
充填することができるので、そのキヤビテイC2
内では両側下端よりその全長に亘つて略均等に湯
面が上昇し、したがつて溶湯がキヤビテイC2内
で乱流を起こすことがなく、空気等のガスが溶湯
に巻き込まれることを防止して巣の発生を回避す
ることができる。また溶湯の充填作業が効率良く
行われるので、鋳造能率を向上させることができ
る。 When the cross-sectional area of the runner 17 is reduced stepwise in this way, a large amount of molten metal is filled into the second cavity C2 through the weir 19 at a slow speed in the large cross-sectional area, and a small amount is filled in the small cross-sectional area. can be filled into the second cavity C 2 through the weir 19 at a high speed, so that the cavity C 2
Inside the cavity, the melt level rises almost evenly over the entire length from the lower ends of both sides, so the molten metal does not cause turbulent flow within the cavity C2 , and gases such as air are prevented from being drawn into the molten metal. nests can be avoided. Further, since the molten metal filling operation is performed efficiently, casting efficiency can be improved.
第５、第６図に示すように各第１成形部１８1
の頂面には、鋳鉄製スリーブ３の内周面と嵌合す
る位置決め突起２２が突設され、その位置決め突
起２２の中心には凹部２３が形成される。また両
側に位置する２つの第１成形部１８1には、位置
決め突起２２の両側において第１成形部１８1を
貫通する貫通孔２４が形成され、それら貫通孔２
４に一対の仮設置ピン２５がそれぞれ摺合され、
それら仮設置ピン２５は、後述する水ジヤケツト
用可崩壊性中子の仮設置のために用いられる。両
仮設置ピン２５の下端は、成形ブロツク１８の下
方に配設された取付板２６に固定される。その取
付板２６には２本の支持ロツド２７が挿通され、
各支持ロツド２７の下部と取付板２６の下面との
間にはコイルばね２８が縮設される。型開き時に
は、取付板２６は各コイルばね２８の弾発力を受
けて各支持ロツド２７先端のストツパ２７ａに当
接するまで上昇し、これにより各仮設置ピン２５
の先端は第１成形部１８1頂面より突出している。
各仮設置ピン２５の先端面には中子の下縁と係合
する凹部２５ａが形成される。 As shown in FIGS. 5 and 6, each first molding section 18 1
A positioning protrusion 22 that fits into the inner peripheral surface of the cast iron sleeve 3 is protruded from the top surface of the cast iron sleeve 3, and a recess 23 is formed in the center of the positioning protrusion 22. Furthermore, in the two first molded parts 18 1 located on both sides, through holes 24 are formed that penetrate through the first molded parts 18 1 on both sides of the positioning protrusion 22 .
4, a pair of temporary installation pins 25 are slid together, respectively.
These temporary installation pins 25 are used for temporary installation of a collapsible core for a water jacket, which will be described later. The lower ends of both temporary installation pins 25 are fixed to a mounting plate 26 disposed below the forming block 18. Two support rods 27 are inserted into the mounting plate 26,
A coil spring 28 is compressed between the lower part of each support rod 27 and the lower surface of the mounting plate 26. When the mold is opened, the mounting plate 26 receives the elastic force of each coil spring 28 and rises until it comes into contact with the stopper 27a at the tip of each support rod 27, whereby each temporary installation pin 25
The tip of the molded portion 181 protrudes from the top surface of the first molded portion 181 .
A recess 25a that engages with the lower edge of the core is formed on the tip end surface of each temporary installation pin 25.
また両側に位置する２つの第１成形部１８1に
は、両貫通孔２４間の二等分位置において第１成
形部１８1を貫通する貫通孔２９が形成され、そ
の貫通孔２９に下端を取付板２６に固定された作
動ピン３０が摺合される。型開き時には、作動ピ
ン３０の先端は凹部２３内に突出し、また型閉め
時には後述する拡径機構により押し下げられ、こ
れにより両仮設置ピン２５を第１成形部１８1頂
面より引き込ませるようになつている。 Further, in the two first molded parts 18 1 located on both sides, a through hole 29 is formed that penetrates the first molded part 18 1 at a bisecting position between both through holes 24 , and the lower end is inserted into the through hole 29 . An operating pin 30 fixed to the mounting plate 26 is slid together. When the mold is opened, the tip of the operating pin 30 protrudes into the recess 23, and when the mold is closed, it is pushed down by a diameter expanding mechanism, which will be described later, so that both temporary pins 25 are retracted from the top surface of the first molding section 181 . It's summery.
上型９の型締め用凹部１２には、第１キヤビテ
イC1に連通して溶湯をオーバフローさせるため
の複数の第３キヤビテイC3が開口し、また上型
９には各第３キヤビテイC3に連通する貫通孔３
２が形成される。 A plurality of third cavities C 3 are opened in the mold clamping recess 12 of the upper mold 9 to communicate with the first cavity C 1 and allow the molten metal to overflow . Through hole 3 communicating with
2 is formed.
各貫通孔３２には閉鎖ピン３４がそれぞれ挿入
され、その閉鎖ピン３４の上端は上型９の上方に
配設される取付板３６に固定される。 A closing pin 34 is inserted into each through hole 32, and the upper end of the closing pin 34 is fixed to a mounting plate 36 disposed above the upper mold 9.
各貫通孔３２の、第３キヤビテイC3に対する
連通端から上方へ所定の長さに亘つて延びる小径
部３２ａは閉鎖ピン３４と嵌合して第３キヤビテ
イC3を閉鎖し得るが、その外の部分の直径は閉
鎖ピン３４の直径よりも大きく、これにより閉鎖
ピン３４と貫通孔３２間に空気通路３７が形成さ
れる。 The small diameter portion 32a of each through hole 32, which extends upward over a predetermined length from the communicating end with respect to the third cavity C3 , can be fitted with the closing pin 34 to close the third cavity C3 ; The diameter of the portion is larger than the diameter of the closing pin 34, thereby forming an air passage 37 between the closing pin 34 and the through hole 32.
上型９の頂面と取付板３６間には油圧シリンダ
３９が介装され、その油圧シリンダ３９の作動に
より取付板３６を昇降して各閉鎖ピン３４により
各小径部３２ａを開閉するようになつている。４
０は取付板３６の案内ロツドである。 A hydraulic cylinder 39 is interposed between the top surface of the upper mold 9 and the mounting plate 36, and the operation of the hydraulic cylinder 39 raises and lowers the mounting plate 36 to open and close each small diameter portion 32a using each closing pin 34. ing. 4
0 is a guide rod of the mounting plate 36.
上型９には、各シリンダバレル１1〜１4に鋳ぐ
るまれるスリーブ３を保持するための拡径機構４
１が設けられ、その機構４１は下記のように構成
される。 The upper mold 9 has a diameter expanding mechanism 4 for holding the sleeve 3 cast into each cylinder barrel 1 1 to 1 4 .
1 is provided, and its mechanism 41 is constructed as follows.
上型９には、作動ピン３０の延長軸線に中心線
を合致させた貫通孔４２が形成され、その貫通孔
４２に支持ロツド４３が遊挿される。その支持ロ
ツド４３の上端は上型９の頂面に立設されたブラ
ケツト４４に固定され、またその下端に溶湯浸入
防止板４５が固着される。溶湯浸入防止板４５の
下面には、下型１１における第１成形部１８1頂
面の凹部２３に嵌合し得る凸部４５ａが形成され
る。 A through hole 42 whose center line coincides with the extension axis of the operating pin 30 is formed in the upper mold 9, and a support rod 43 is loosely inserted into the through hole 42. The upper end of the support rod 43 is fixed to a bracket 44 erected on the top surface of the upper mold 9, and a molten metal intrusion prevention plate 45 is fixed to the lower end. A convex portion 45 a that can fit into the concave portion 23 on the top surface of the first molded portion 18 1 in the lower mold 11 is formed on the lower surface of the molten metal intrusion prevention plate 45 .
中空の保持筒４６は円形の外周面と、上部から
下部に向けて下り勾配のテーパ孔４７を有し、上
型９から下方へ突出する支持ロツド４３の下部は
保持筒４６のテーパ孔４７に遊挿され、その保持
筒４６の上端面は上型９の凹部１２に突設された
凸部４８に当接し、また下端面は溶湯浸入防止板
４５に当接する。第９図に示すように保持筒４６
の周壁部にはその内周面および外周面より半径方
向に延びる複数のすり割溝４９が交互に且つ円周
上等間隔に形成される。 The hollow holding cylinder 46 has a circular outer peripheral surface and a tapered hole 47 with a downward slope from the top to the bottom. The holding cylinder 46 is inserted loosely, and its upper end surface abuts a protrusion 48 protruding from the recess 12 of the upper mold 9, and its lower end surface abuts a molten metal intrusion prevention plate 45. As shown in FIG.
A plurality of slot grooves 49 extending radially from the inner circumferential surface and outer circumferential surface of the circumferential wall are formed alternately and at equal intervals on the circumference.
支持ロツド４３には、保持筒４６を拡径するた
めの中空状作動ロツド５０が支持ロツド４３の略
全長に亘つて摺合され、その作動ロツド５０は保
持筒４６のテーパ孔４７に嵌合するテーパ部５０
ａと、そのテーパ部５０ａに連設されて上型９の
貫通孔４２に摺合されると共に上型９より突出す
る真円部５０ｂとよりなる。テーパ部５０ａには
複数のピン５７が突設され、それらピン５７は保
持筒４６の上下方向に長いピン孔５８に挿入さ
れ、これによりテーパ部５０ａの上下動を許容し
つつ保持筒４６の回止めがなされる。 A hollow actuating rod 50 for expanding the diameter of the holding tube 46 is slid onto the supporting rod 43 over substantially the entire length of the supporting rod 43, and the actuating rod 50 has a tapered shape that fits into the tapered hole 47 of the holding tube 46. Part 50
a, and a perfectly circular portion 50b that is connected to the tapered portion 50a, slides into the through hole 42 of the upper mold 9, and projects from the upper mold 9. A plurality of pins 57 are provided protruding from the tapered portion 50a, and these pins 57 are inserted into pin holes 58 that are long in the vertical direction of the holding tube 46, thereby allowing the rotation of the holding tube 46 while allowing the vertical movement of the tapered portion 50a. A stop is made.
上型９の頂面には、油圧シリンダ５１が固定さ
れ、その中空ピストン５２の上端面および下端面
に突設された中空ピストンロツド５３1，５３2が
シリンダ本体５４の上端壁および下端壁をそれぞ
れ貫通している。中空ピストン５２および中空ピ
ストンロツド５３を貫通する貫通孔５５には作動
ロツド５０の真円部５０ｂが挿入され、その真円
部５０ｂの環状溝に嵌めた抜止めストツパ５６1，
５６2を中空ピストンロツド５３1，５３2の上、
下端面にそれぞれ当接させて中空ピストン５２に
より作動ロツド５０を昇降するようになつてい
る。前記拡径機構４１はシリンダブロツクＳの各
シリンダバレル１1〜１4に対応して４機設けられ
る。 A hydraulic cylinder 51 is fixed to the top surface of the upper die 9, and hollow piston rods 53 1 and 53 2 projecting from the upper and lower end surfaces of the hollow piston 52 respectively touch the upper and lower end walls of the cylinder body 54. Penetrating. A true circular portion 50b of the actuating rod 50 is inserted into a through hole 55 passing through the hollow piston 52 and the hollow piston rod 53, and a stopper 56 1 to prevent removal is fitted into an annular groove of the circular portion 50b.
56 2 on the hollow piston rods 53 1 and 53 2 ,
The actuating rod 50 is raised and lowered by a hollow piston 52, which is brought into contact with the lower end surface. Four diameter expanding mechanisms 41 are provided corresponding to each of the cylinder barrels 11 to 14 of the cylinder block S.
第１０、第１１図は筒状をなす水ジヤケツト用
可崩壊性中子５９を示し、その中子５９は、シリ
ンダブロツクＳの４本のシリンダバレル１1〜１4
に対応して４本の円筒部６０1〜６０4を備えると
共にそれらの相隣るもの相互の重合する周壁を欠
如させた筒状中子体６１と、各円筒部６０1〜６
０4の上端面に設けられた位置決め突起６２1〜６
２4とよりなる。それら位置決め突起６２1〜６２
４のうち、両端の円筒部６０1，６０4に設けられ
たもの６２1，６２4は円筒部６０1〜６０4の配列
方向と平行な円筒部直径の延長線上において互い
に逆向きに突出し、また中間の円筒部６０2，６
０3に設けられたもの６２2，６２3は前記配列方
向と直交する円筒部直径の延長線上において互い
に逆向きに突出する。 10 and 11 show a cylindrical collapsible core 59 for a water jacket, and the core 59 is connected to the four cylinder barrels 1 1 to 1 4 of the cylinder block S.
A cylindrical core body 61 is provided with four cylindrical parts 60 1 to 60 4 corresponding to each other, and lacks a peripheral wall where adjacent ones overlap with each other, and each of the cylindrical parts 60 1 to 6
Positioning protrusions 62 1 to 6 provided on the upper end surface of 0 4
2 4 and more. Those positioning protrusions 62 1 to 62
4 , those 62 1 and 62 4 provided in the cylindrical parts 60 1 and 60 4 at both ends protrude in opposite directions to each other on an extension line of the diameter of the cylindrical parts parallel to the arrangement direction of the cylindrical parts 60 1 to 60 4 , Also, the intermediate cylindrical portions 60 2 , 6
The portions 62 2 and 62 3 provided at 0 3 protrude in opposite directions to each other on an extension line of the diameter of the cylindrical portion orthogonal to the arrangement direction.
両端の円筒部６０1，６０4の上端には前記配列
方向と直交する直径上に位置するように一対の欠
如部としての切欠き部６３が対向して形成され
る。また中間の円筒部６０2，６０3には各位置決
め突起６２2，６２3の下部に位置する欠如部とし
ての開口部６４と、その開口部６４と対向する切
欠き部６３がそれぞれ形成される。これら切欠き
部６３および開口部６４は前記補強デツキ部８を
成形するために用いられる。図示例において、中
子５９はレジンコーテツドサンドを形成材料とし
て成形されている。 At the upper ends of the cylindrical parts 60 1 and 60 4 at both ends, a pair of cutout parts 63 are formed to face each other and are located on a diameter perpendicular to the arrangement direction. Further, the intermediate cylindrical portions 60 2 and 60 3 are formed with an opening 64 as a missing portion located below each positioning protrusion 62 2 and 62 3 , and a notch 63 facing the opening 64. . These notches 63 and openings 64 are used to form the reinforcing deck portion 8. In the illustrated example, the core 59 is molded from resin coated sand.
第５、第６図に示すように、上型９の型締め用
凹部１２には各位置決め突起６２1〜６２4と嵌合
して中子５９の位置決めを行う位置決め凹部６５
が開口し、また各凹部６５には各突起６２1〜６
２4の上面と当接して中子５９の浮上りを防止す
る押圧ピン６６が突設される。 As shown in FIGS. 5 and 6, the mold clamping recess 12 of the upper die 9 has a positioning recess 65 that engages with each of the positioning protrusions 62 1 to 62 4 to position the core 59.
is opened, and each recess 65 has each protrusion 62 1 to 6
A pressing pin 66 that comes into contact with the upper surface of the core 59 to prevent the core 59 from floating is provided in a protruding manner.
次に前記鋳造装置による鋳造体Csの鋳造作業
について説明する。 Next, a description will be given of the casting operation of the cast body Cs using the casting apparatus.
先ず第５図に示すように、上型９を上昇させ、
また相対向する両側型１０1，１０2；１０3，１
０4を互いに離間するように移動させて型開きを
行う。拡径機構４１においては、各油圧シリンダ
５１を作動させて中空ピストン５２により作動ロ
ツド５０を下降させ、テーパ部５０ａの下方移動
により保持筒４６を縮径させておく。また上型９
上の油圧シリンダ３９を作動させて取付板３６を
上昇させ、これにより各閉鎖ピン３４を第３キヤ
ビテイC3に連通する小径部３２ａより離脱させ
る。さらに給湯シリンダ１５内のプランジヤ１６
を下降させる。 First, as shown in FIG. 5, the upper mold 9 is raised,
Also, opposing both sides 10 1 , 10 2 ; 10 3 , 1
0 4 are moved apart from each other to open the mold. In the diameter expanding mechanism 41, each hydraulic cylinder 51 is operated to lower the actuating rod 50 using the hollow piston 52, and the holding cylinder 46 is contracted in diameter by moving the tapered portion 50a downward. Also upper mold 9
The upper hydraulic cylinder 39 is actuated to raise the mounting plate 36, thereby separating each closing pin 34 from the small diameter portion 32a communicating with the third cavity C3 . Furthermore, the plunger 16 inside the hot water cylinder 15
lower.
略真円の鋳鉄製スリーブ３を各保持筒４６に遊
嵌し、スリーブ３の上端開口を上型９の凸部４８
に嵌合して閉鎖し、またスリーブ３の下端面を溶
湯浸入防止板４５の凸部４５ａ下端面に合致させ
ると共に溶湯浸入防止板４５によりスリーブ３の
下端開口を閉鎖する。そして拡径機構４１の油圧
シリンダ５１を作動させ、その中空ピストン５２
により作動ロツド５０を上昇させる。これにより
テーパ部５０ａが上方へ移動するので保持筒４６
が拡径し、スリーブ３は拡径力を受けて保持筒４
６に確実に保持される。 A substantially perfect circular cast iron sleeve 3 is loosely fitted into each holding cylinder 46, and the upper end opening of the sleeve 3 is inserted into the convex portion 48 of the upper die 9.
The lower end surface of the sleeve 3 is fitted to the lower end surface of the convex portion 45a of the molten metal infiltration prevention plate 45, and the lower end opening of the sleeve 3 is closed by the molten metal infiltration prevention plate 45. Then, the hydraulic cylinder 51 of the diameter expansion mechanism 41 is operated, and the hollow piston 52
to raise the actuating rod 50. As a result, the tapered portion 50a moves upward, so that the holding cylinder 46
expands in diameter, and the sleeve 3 receives the diameter expansion force and retains the holding cylinder 4.
6.
第５、第１１図に示すように中子５９における
両側の円筒部６０1，６０4下縁を、下型１１にお
ける両側の第１成形部１８1の頂面に突出する各
仮設置ピン２５の凹部２５ａに係合させて中子５
９の仮設置を行う。 As shown in FIGS. 5 and 11, the lower edges of the cylindrical portions 60 1 , 60 4 on both sides of the core 59 are projected onto the top surface of the first molded portions 18 1 on both sides of the lower mold 11 by temporary installation pins 25 . The core 5 is engaged with the recess 25a of the core 5.
9. Perform temporary installation.
第６図に示すように、両側型１０1，１０2をそ
れらが互いに接近する方向に所定距離移動させて
両側型１０1，１０2を閉じ、中子５９の各位置決
め突起６２1〜６２4を凸部１３の上面に係合させ
る。また、他の両側型１０3，１０4も同様に移動
させてこれらを閉じる。 As shown in FIG. 6, the double-sided molds 10 1 and 10 2 are moved a predetermined distance in the direction in which they approach each other, the double-sided molds 10 1 and 10 2 are closed, and the respective positioning protrusions 62 1 to 62 4 of the core 59 are moved. is engaged with the upper surface of the convex portion 13. Further, the other double-sided molds 10 3 and 10 4 are similarly moved and closed.
また上型９を下降させて各スリーブ３を中子５
９の各円筒部６０1〜６０4内に挿入し、溶湯浸入
防止板４５の凸部４５ａを第１成形部１８1頂面
の凹部２３に嵌合する。これにより溶湯浸入防止
板４５の凸部４５ａにより作動ピン３０が押し下
げられるので各仮設置ピン２４が下降して第１成
形部１８1頂面より引込む。また上型９の型締め
用凹部１２が両側型１０1〜１０4の型締め用凸部
１３に嵌合するので、上型９の各位置決め凹部６
５が中子５９の各位置決め突起６２1〜６２4に嵌
合し、また各押圧ピン６６が各位置決め突起６２
１〜６２4を押圧し、さらに上型９の凹部１２の天
面が各円筒部６０1〜６０4の端面に接する。これ
により型締めが行われると同時に中子５９が第１
キヤビテイC1に位置決め固定される。 In addition, the upper die 9 is lowered and each sleeve 3 is attached to the core 5.
9, and the convex portion 45a of the molten metal intrusion prevention plate 45 is fitted into the concave portion 23 on the top surface of the first molded portion 181 . As a result, the operating pins 30 are pushed down by the convex portions 45a of the molten metal intrusion prevention plate 45, so that each temporary installation pin 24 is lowered and retracted from the top surface of the first molded portion 181 . Furthermore, since the mold clamping recesses 12 of the upper mold 9 fit into the mold clamping convex parts 13 of the molds 10 1 to 10 4 on both sides, each positioning recess 6 of the upper mold 9
5 fits into each positioning protrusion 62 1 to 62 4 of the core 59 , and each press pin 66 fits into each positioning protrusion 62 4 .
1 to 62 4 are pressed, and the top surface of the recessed portion 12 of the upper die 9 comes into contact with the end surface of each of the cylindrical portions 60 1 to 60 4 . As a result, the mold is clamped and at the same time the core 59 is
Positioned and fixed in cavity C 1 .
下型１１の湯溜部１４に溶解炉よりアルミニウ
ム合金よりなる溶湯を供給し、プランジヤ１６を
上昇させて溶湯を両湯道１７より堰１９を通じて
第２キヤビテイC2の両下縁よりそのキヤビテイ
C2および第１キヤビテイC1に充填する。両キヤ
ビテイC1，C2内の空気等のガスは、溶湯により
押し上げられ第３キヤビテイC3に連通する空気
通路３７を経て上型９の上方へ抜ける。 A molten metal made of aluminum alloy is supplied from the melting furnace to the sump 14 of the lower mold 11, and the plunger 16 is raised to allow the molten metal to pass through the weir 19 from both runners 17 and into the cavity from both lower edges of the second cavity C2 .
Fill C 2 and the first cavity C 1 . Gas such as air in both cavities C 1 and C 2 is pushed up by the molten metal and escapes above the upper mold 9 through an air passage 37 communicating with the third cavity C 3 .
この場合両湯道１７の断面積が前述のように湯
道先１７ａに向けて段階的に減少するように、湯
道底面が湯溜部１４側より数段の上り階段状に形
成されているので、プランジヤ１６の上昇により
溶湯は両湯道１７より各堰１９を通じて第２キヤ
ビテイC2の両側下端よりその全長に亘つて略均
等にそのキヤビテイC2内をスムーズに押し上げ
られる。したがつて溶湯が両キヤビテイC1，C2
内で乱流を起こすことがなく、溶湯中への空気等
のガスの巻込みを防止して巣の発生を回避するこ
とができる。 In this case, the bottom surface of the runners is formed in the shape of several steps ascending from the trough portion 14 side so that the cross-sectional area of both runners 17 gradually decreases toward the runner tip 17a as described above. As the plunger 16 rises, the molten metal is smoothly pushed up into the cavity C 2 from both runners 17 and through each weir 19 from the lower ends of both sides of the second cavity C 2 almost uniformly over its entire length. Therefore, the molten metal has both cavities C 1 and C 2
This prevents turbulence within the molten metal, prevents gases such as air from getting into the molten metal, and prevents the formation of cavities.
第３キヤビテイC3に溶湯が充填された時点で、
上型９上の油圧シリンダ３９を作動させて取付板
３６を下降させ、閉鎖ピン３４によつて第３キヤ
ビテイC3に連通する小径部３２ａを閉鎖する。 When the third cavity C3 is filled with molten metal,
The hydraulic cylinder 39 on the upper mold 9 is operated to lower the mounting plate 36, and the small diameter portion 32a communicating with the third cavity C3 is closed by the closing pin 34.
前記注湯作業において、第２キヤビテイC2お
よび第１キヤビテイC1に溶湯を充填するための
プランジヤ１６の変位および溶湯圧力は第１２図
に示すように制御される。 In the pouring operation, the displacement of the plunger 16 and the pressure of the molten metal for filling the second cavity C 2 and the first cavity C 1 with molten metal are controlled as shown in FIG. 12.
即ち、プランジヤ１６はその移動速度を第１〜
第３速V1〜V3の３段階に制御される。本実施例
では第１速V1は0.08〜0.12m／sec、第２速V2は
0.14〜0.18m／sec、第３速V3は大幅な減速状態
となるように0.04〜0.08m／secにそれぞれ設定さ
れ、この３段階の速度制御によつて溶湯の波立を
防止して空気等のガスを巻き込むことのない静か
な溶湯流を形成し、その溶湯を前記両キヤビテイ
C2，C1に効率良く充填することができる。 That is, the plunger 16 changes its moving speed from the first to
The third speed is controlled in three stages, V1 to V3 . In this example, the first speed V 1 is 0.08 to 0.12 m/sec, and the second speed V 2 is
0.14 to 0.18 m/sec, and the third speed V 3 is set to 0.04 to 0.08 m/sec to achieve a significant deceleration state, and this three-stage speed control prevents rippling of the molten metal and removes air, etc. Forms a quiet flow of molten metal without involving any gases, and directs the molten metal into both cavities.
C 2 and C 1 can be efficiently filled.
またプランジヤ１６の第１速V1では、溶湯は
両湯道１７等に充満するだけであるから溶湯の圧
力P1は略一定に保持され、プランジヤ１６の第
２、第３速V2，V3では溶湯は両キヤビテイC1，
C2に充填されるので溶湯の圧力P2は急激に上昇
する。プランジヤ１６を第３速V3で所定時間移
動させた後は、溶湯の充填圧P3を約1.5秒間、150
〜400Kg／cm2に保持し、これにより中子５９を溶
湯により完全に包んでその表面に溶湯凝固膜を形
成する。 In addition, at the first speed V 1 of the plunger 16, the molten metal only fills both runners 17, etc., so the pressure P 1 of the molten metal is kept approximately constant, and at the second and third speeds V 2 and V of the plunger 16. 3 , the molten metal is in both cavities C 1 ,
Since C 2 is filled with molten metal, the pressure P 2 of the molten metal rises rapidly. After moving the plunger 16 at the third speed V3 for a predetermined time, the molten metal filling pressure P3 is increased to 150°C for about 1.5 seconds.
~400 Kg/cm 2 , thereby completely covering the core 59 with the molten metal and forming a molten metal coagulation film on its surface.
前記時間経過後においては、プランジヤ１６を
速度V4で減速移動させるので溶湯の圧力P4は上
昇し、その圧力P5が200〜600Kg／cm2となつたと
きプランジヤ１６の移動を止めてこの状態で溶湯
を凝固させる。 After the above-mentioned time has elapsed, the plunger 16 is moved at a reduced speed V4 , so the pressure P4 of the molten metal rises, and when the pressure P5 reaches 200 to 600 kg/ cm2 , the plunger 16 stops moving. solidify the molten metal.
前記のように溶湯の圧力を所定時間略一定に保
つことにより中子５９の表面に溶湯凝固膜を形成
すると、次の溶湯加圧時に中子５９が前記膜によ
り保護されて破損することがない。 If a molten metal coagulation film is formed on the surface of the core 59 by keeping the pressure of the molten metal substantially constant for a predetermined period of time as described above, the core 59 will be protected by the film and will not be damaged during the next pressurization of the molten metal. .
また中子５９は、それの各位置決め突起６２1
〜６２4、各位置決め凹部６５および各押圧ピン
６６を介して上型９および両側型１０1，１０2間
に不動に保持されているので、第１キヤビテイ
C1内への溶湯の充填時およびそのキヤビテイC1
内の溶湯の加圧時において中子５９が浮き上がつ
たりすることがなく、各スリーブ３回りの肉厚が
均一なサイアミーズシリンダバレル１が得られ
る。 The core 59 also has its respective positioning protrusions 62 1
~ 62 4 , are immovably held between the upper mold 9 and both side molds 10 1 and 10 2 via each positioning recess 65 and each pressing pin 66, so that the first cavity
When filling molten metal into C 1 and its cavity C 1
When the molten metal inside is pressurized, the core 59 does not float up or sag, and the Siamese cylinder barrel 1 with uniform wall thickness around each sleeve 3 can be obtained.
前記のようにプランジヤ１６の移動速度および
溶湯の圧力を制御することによつてダイカスト鋳
造と略同じ生産効率を以てクローズドデツキ型の
シリンダブロツク素材用鋳造体を鋳造することが
できる。 By controlling the moving speed of the plunger 16 and the pressure of the molten metal as described above, it is possible to cast a closed deck type cylinder block material casting with substantially the same production efficiency as die casting.
溶湯が凝固を完了した後、拡径機構４１の油圧
シリンダ５１を作動させ、作動ロツド５０を下降
させてスリーブ３に対する保持筒４６の拡径力を
除去し、型開きを行うと第４図に示す鋳造体Cs
が得られる。 After the molten metal has solidified, the hydraulic cylinder 51 of the diameter expansion mechanism 41 is operated, the operating rod 50 is lowered to remove the diameter expansion force of the holding cylinder 46 against the sleeve 3, and the mold is opened. Cast body Cs shown
is obtained.
この鋳造体Csにおいては、中子５９の内側に
サイアミーズシリンダバレル１が、また中子５９
の外側にシリンダブロツク外壁４が、さらに各開
口部６３，６４の位置に補強デツキ部８がそれぞ
れ配設されている。また各位置決め突起６２1〜
６２4の位置には、それと上型９の各位置決め凹
部６５との協働により突起部６７が成形される。 In this cast body Cs, the Siamese cylinder barrel 1 is inside the core 59, and the core 59
A cylinder block outer wall 4 is provided on the outside of the cylinder block, and reinforcing deck portions 8 are provided at the positions of the openings 63 and 64, respectively. In addition, each positioning protrusion 62 1 ~
At the position 62 4 , a protrusion 67 is formed by cooperation with each positioning recess 65 of the upper die 9 .
排砂処理に当つては、先ず各突起部６７をハン
マ等により折つて除去し、相隣る補強デツキ８間
に水ジヤケツト６の開口部６ａを得ると共にその
開口部６ａに中子５９の端面を露出させる。 In the sand removal process, first, each protrusion 67 is broken off with a hammer or the like, and the opening 6a of the water jacket 6 is obtained between the adjacent reinforcing decks 8, and the end face of the core 59 is inserted into the opening 6a. expose.
次いで中子５９を水ジヤケツト６の開口部６ａ
よりドリル等の工具を用いて粗く崩し、その後鋳
造体Csに振動を与えて中子５９を完全に崩壊す
る。 Next, insert the core 59 into the opening 6a of the water jacket 6.
The core 59 is broken down roughly using a tool such as a drill, and then vibration is applied to the cast body Cs to completely break down the core 59.
そして、中子５９を形成していたレジンコーテ
ツドサンドを水ジヤケツト６の開口部６ａを通じ
て外部に排出するもので、これにより第１〜第３
図に示すようにシリンダブロツク外壁４に開口部
を持たないシリンダブロツク素材Smが得られる。 The resin coated sand forming the core 59 is then discharged to the outside through the opening 6a of the water jacket 6.
As shown in the figure, a cylinder block material Sm having no opening in the outer wall 4 of the cylinder block is obtained.
前記素材Smに、各スリーブ内周面に真円加工
を施す等所定の機械加工を施すことによりサイア
ミーズ型シリンダブロツクが得られる。 A Siamese-type cylinder block is obtained by subjecting the material Sm to a predetermined machining process, such as forming a perfect circle on the inner peripheral surface of each sleeve.
第１３図はベンチ耐久テスト前およびテスト後
における、シリンダバレル配列方向と直交する方
向のシリンダボアの内径を示し、同図ａは本発明
により得られた素材よりなる補強デツキ部８を持
つシリンダブロツクに、また同図ｂは補強デツキ
部を持たない比較例シリンダブロツクにそれぞれ
該当する。図中、Ｘは、テスト前のシリンダボア
３ａの内径を、またＹはテスト後のシリンダボア
３ａの内径をそれぞれ示す。 Figure 13 shows the inner diameter of the cylinder bore in the direction perpendicular to the cylinder barrel arrangement direction before and after the bench durability test, and Figure a shows the cylinder block with the reinforcing deck part 8 made of the material obtained by the present invention. , and b of the same figure correspond to a comparative example cylinder block that does not have a reinforcing deck portion. In the figure, X indicates the inner diameter of the cylinder bore 3a before the test, and Y indicates the inner diameter of the cylinder bore 3a after the test.
第１３図ａから明らかなように補強デツキ部付
シリンダブロツクにおいては、爆発荷重を最も強
く受けるシリンダヘツド接合面近傍でのシリンダ
ボアの内径変化量が約4μと僅少であるが、比較
例シリンダブロツクにおいては、前記内径変化量
が約26μと増加しており、補強デツキ部８による
変形抑制効果が認められる。 As is clear from Fig. 13a, in the cylinder block with reinforced deck part, the change in the inner diameter of the cylinder bore near the cylinder head joint surface, which is most strongly subjected to the explosion load, is small at about 4μ, but in the comparative example cylinder block, In this case, the amount of change in the inner diameter increases to approximately 26μ, and the deformation suppressing effect of the reinforcing deck portion 8 is recognized.
Ｃ 発明の効果
本発明によれば、水ジヤケツト用中子として可
崩壊性中子を用いて鋳造体を鋳造した後、水ジヤ
ケツトの比較的広い開口部を通じて中子形成材料
を排出するので、シリンダブロツク外壁に開口部
が形成されることがなく、したがつて開口部閉鎖
のための部品および工数を省くことができる。C. Effects of the Invention According to the present invention, after a cast body is cast using a collapsible core as a core for a water jacket, the core forming material is discharged through a relatively wide opening of the water jacket. No openings are formed in the outer wall of the block, thus eliminating the need for parts and man-hours for closing the openings.
第１乃至第３図はサイアミーズ型シリンダブロ
ツク素材を示し、第１図は上方からみた斜視図、
第２図は第１図−線断面図、第２Ａ図は第２
図ａ−ａ線断面図、第２Ｂ図は第１図ｂ−
ｂ線断面図、第３図は下方から見た斜視図、第
４図は鋳造体を上方から見た斜視図、第５図は本
発明の実施に用いる鋳造装置の型開き時の縦断正
面図、第６図は前記鋳造装置の型閉め時の縦断正
面図、第７図は第６図−線断面図、第８図は
第７図−線断面図、第９図は第５図−線
断面図、第１０図は中子を上方から見た斜視図、
第１１図は第１０図XI−XI線断面図、第１２図は
時間に対するプランジヤの変位および時間に対す
る溶湯の圧力の関係を示すグラフ、第１３図はサ
イアミーズシリンダバレルのシリンダヘツド接合
面からの深さとシリンダボアの内径変化量の関係
を示すグラフである。
Cs…鋳造体、Sm…シリンダブロツク素材、１
…サイアミーズシリンダバレル、１1〜１4…シリ
ンダバレル、４…シリンダブロツク外壁、６…水
ジヤケツト、６ａ…開口部、８…補強デツキ部、
５９…中子、６３，６４…欠如部。
Figures 1 to 3 show the Siamese type cylinder block material, Figure 1 is a perspective view from above,
Figure 2 is a sectional view taken along the line shown in Figure 1, and Figure 2A is a sectional view taken along the line of Figure 1.
Figure a-a sectional view, Figure 2B is Figure 1b-
3 is a perspective view seen from below, FIG. 4 is a perspective view of the cast body seen from above, and FIG. 5 is a longitudinal sectional front view of the casting device used to carry out the present invention when the mold is opened. , FIG. 6 is a longitudinal sectional front view of the casting apparatus when the mold is closed, FIG. 7 is a sectional view taken along the line of FIG. 6, FIG. 8 is a sectional view taken along the line of FIG. 7, and FIG. 9 is a sectional view taken along the line of FIG. 5. A sectional view, FIG. 10 is a perspective view of the core seen from above,
Fig. 11 is a sectional view taken along the line XI-XI in Fig. 10, Fig. 12 is a graph showing the relationship between the displacement of the plunger with respect to time and the pressure of molten metal with respect to time, and Fig. 13 is the depth from the cylinder head joint surface of the Siamese cylinder barrel. 3 is a graph showing the relationship between the amount of change in the inner diameter of the cylinder bore and the amount of change in the inner diameter of the cylinder bore. Cs...Casting body, Sm...Cylinder block material, 1
... Siamese cylinder barrel, 1 1 to 1 4 ... cylinder barrel, 4 ... cylinder block outer wall, 6 ... water jacket, 6a ... opening, 8 ... reinforcing deck part,
59... Core, 63, 64... Missing part.
Claims (1)
ミーズシリンダバレルと；該サイアミーズシリン
ダバレルを囲繞するシリンダブロツク外壁と；前
記サイアミーズシリンダバレルと前記シリンダブ
ロツク外壁間に、該サイアミーズシリンダバレル
全周が臨むように設けられた水ジヤケツトと；前
記シリンダブロツク外壁と前記サイアミーズシリ
ンダバレルとを、前記水ジヤケツトにおけるシリ
ンダヘツド側の開口部で連結する複数の補強デツ
キ部と；を備え、前記補強デツキ部はシリンダバ
レル配列方向と直交する各シリンダバレル直径の
延長線上で各シリンダバレルを挟むように配設さ
れているサイアミーズ型シリンダブロツク素材の
製造方法であつて、各補強デツキ部に対応する位
置に欠如部を有する筒状水ジヤケツト用可崩壊性
中子を用いて鋳造することにより、該中子の内側
に前記サイアミーズシリンダバレルを、また該中
子の外側に前記シリンダブロツク外壁を、さらに
各欠如部の位置に各補強デツキ部をそれぞれ成形
して、前記水ジヤケツトの開口部に前記中子の端
面を露出させた鋳造体を得る工程と；前記鋳造体
中の前記中子を崩壊して前記水ジヤケツトの開口
部より中子形成材料を排出する工程と；よりなる
サイアミーズ型シリンダブロツク素材の製造方
法。1. A Siamese cylinder barrel formed by combining a plurality of cylinder barrels; A cylinder block outer wall surrounding the Siamese cylinder barrel; and a Siamese cylinder barrel provided so that the entire circumference of the Siamese cylinder barrel faces between the Siamese cylinder barrel and the cylinder block outer wall; a plurality of reinforcing deck portions that connect the outer wall of the cylinder block and the Siamese cylinder barrel through an opening on the cylinder head side of the water jacket; the reinforcing deck portions are arranged in the direction in which the cylinder barrels are arranged; A method for manufacturing a Siamese-type cylinder block material, which is arranged so as to sandwich each cylinder barrel on an extension line of each cylinder barrel diameter perpendicular to By casting using a collapsible core for water jackets, the Siamese cylinder barrel is placed inside the core, the outer wall of the cylinder block is placed outside the core, and each reinforcement is placed at each missing portion. forming the deck portions to obtain a cast body in which the end face of the core is exposed at the opening of the water jacket; and collapsing the core in the cast body to expose the end face of the core to the opening of the water jacket. A method for manufacturing a Siamese type cylinder block material, comprising: a step of discharging core forming material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26817484A JPS61147945A (en) | 1984-12-19 | 1984-12-19 | Production of blank material for siamese type cylinder block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26817484A JPS61147945A (en) | 1984-12-19 | 1984-12-19 | Production of blank material for siamese type cylinder block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61147945A JPS61147945A (en) | 1986-07-05 |
| JPS6338258B2 true JPS6338258B2 (en) | 1988-07-29 |
Family
ID=17454938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26817484A Granted JPS61147945A (en) | 1984-12-19 | 1984-12-19 | Production of blank material for siamese type cylinder block |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61147945A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2579004B2 (en) * | 1989-12-05 | 1997-02-05 | ドーラー・ジヤービス・リミテツド・パートナーシツプ | Collapsible sand core for cylinder of engine block |
| JPH0673715B2 (en) * | 1989-12-05 | 1994-09-21 | ドーラー・ジヤービス・リミテツド・パートナーシツプ | Mold for internal combustion engine cylinder casting, mold having these mold groups, and casting method using these molds and molds |
-
1984
- 1984-12-19 JP JP26817484A patent/JPS61147945A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61147945A (en) | 1986-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4905642A (en) | Siamese-type cylinder block blank and apparatus for casting the same | |
| CA1266757A (en) | Method for manufacturing siamese-type cylinder block and apparatus for casting blank for such cylinder block | |
| JPH0336620B2 (en) | ||
| JPS6338258B2 (en) | ||
| JPH0140709B2 (en) | ||
| JPS6338259B2 (en) | ||
| JPH0322255B2 (en) | ||
| JPH0555223B2 (en) | ||
| JPH0141426B2 (en) | ||
| JPH0349778Y2 (en) | ||
| JPH0328995Y2 (en) | ||
| JPS61142351A (en) | Siamease type cylinder block | |
| JPH0215305B2 (en) | ||
| JPH0131984B2 (en) | ||
| JPH0245943B2 (en) | ||
| JPH0245944B2 (en) | ||
| JPH0140710B2 (en) | ||
| JPH0131981B2 (en) | ||
| JPH0148385B2 (en) | ||
| JPH0131982B2 (en) | ||
| JPH0112584B2 (en) | ||
| JPH0131983B2 (en) | ||
| KR900002169B1 (en) | Method for manufacturing slamese type zylinder block and apparatus for casting blank for such zylinder block | |
| JPH0318540B2 (en) | ||
| JPH0724931B2 (en) | Method for controlling molten metal filling in a casting mold for a cylinder block material for a multi-cylinder internal combustion engine |