JPH0652059B2 - Fiber reinforced cylinder block and method of manufacturing the same - Google Patents
Fiber reinforced cylinder block and method of manufacturing the sameInfo
- Publication number
- JPH0652059B2 JPH0652059B2 JP19043585A JP19043585A JPH0652059B2 JP H0652059 B2 JPH0652059 B2 JP H0652059B2 JP 19043585 A JP19043585 A JP 19043585A JP 19043585 A JP19043585 A JP 19043585A JP H0652059 B2 JPH0652059 B2 JP H0652059B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder block
- fiber
- cylinder
- molded body
- 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 - Fee Related
Links
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
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0002—Cylinder arrangements
- F02F7/0007—Crankcases of engines with cylinders in line
-
- 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
-
- 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
-
- 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
- F02F2001/104—Cylinders; Cylinder heads having cooling means for liquid cooling using an open deck, i.e. the water jacket is open at the block top face
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (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、主として自動車用エンジンに用いられる繊維
強化シリンダブロックおよびその製造方法に関する。Detailed Description of the Invention A. OBJECT OF THE INVENTION (1) Field of Industrial Application The present invention relates to a fiber reinforced cylinder block mainly used for automobile engines and a method for manufacturing the same.
(2) 従来の技術 従来、シリンダブロックとしてはアルミニウム合金製シ
リンダブロック本体に鋳鉄製スリーブを鋳ぐるんだもの
が知られている。(2) Conventional Technology Conventionally, as a cylinder block, it is known that a cast iron sleeve is cast around an aluminum alloy cylinder block body.
(3) 発明が解決しようとする問題点 自動車用エンジンの高性能化に伴いシリンダブロックに
要求される諸特性としては、シリンダブロック本体が軽
量で、且つ高強度であること、およびシリンダスリーブ
が耐摩耗性に優れていること等を挙げることができる
が、前記従来のアルミニウム合金製シリンダブロック本
体については強度の点で不十分であり、また鋳鉄製シリ
ンダスリーブについては耐摩耗性の点でやや難がある。(3) Problems to be solved by the invention As the performance of automobile engines becomes higher, various characteristics required for a cylinder block include that the cylinder block body is lightweight and has high strength, and that the cylinder sleeve is durable. Although it can be mentioned that it is excellent in wear resistance, it is insufficient in strength with respect to the conventional aluminum alloy cylinder block body, and it is somewhat difficult in wear resistance with respect to cast iron cylinder sleeve. There is.
本発明は前記に鑑み、軽量で、且つ高強度なシリンダブ
ロック本体と、耐摩耗性に優れたシリンダスリーブとを
備えた前記シリンダブロックおよびその製造方法を提供
することを目的とする。In view of the above, an object of the present invention is to provide a cylinder block body that is lightweight and has high strength, and a cylinder sleeve having excellent wear resistance, and a method for manufacturing the cylinder block.
Ｂ．発明の構成 (1) 問題点を解決するための手段 本発明に係る繊維強化シリンダブロックは、第１の強化
繊維および軽合金マトリックスより構成される高強度な
シリンダブロック本体と；該シリンダブロック本体と一
体化され、第２の強化繊維および前記軽合金マトリック
スより構成される耐摩耗性の優れたシリンダスリーブ
と；よりなることを特徴とする。B. Structure of the Invention (1) Means for Solving the Problems A fiber-reinforced cylinder block according to the present invention is a high-strength cylinder block body composed of a first reinforcing fiber and a light alloy matrix; A cylinder sleeve having excellent wear resistance, which is integrally formed of the second reinforcing fiber and the light alloy matrix;
また本発明に係る繊維強化シリンダブロックの製造方法
は、第１の強化繊維および軽合金マトリックスより構成
される高強度なシリンダブロック本体と；該シリンダブ
ロック本体と一体化され、第２の強化繊維および前記軽
合金マトリックスより構成される耐摩耗性の優れたシリ
ンダスリーブと；よりなる強化繊維シリンダブロックを
製造するに当り、前記第１の強化繊維よりなり、前記シ
リンダブロック本体の形状を有する第１の繊維成形体
と、前記第２の強化繊維よりなり、前記シリンダスリー
ブの形状を有する第２の繊維成形体とを一体に結合して
複合繊維成形体を得る行程と；前記複合繊維成形体を囲
繞するシリンダブロック成形用キャビテイに軽合金より
なる溶湯を、大気圧を上回る所定の圧力下で注入する工
程と；前記溶湯を前記圧力を上回る高圧下で完全凝固さ
せる工程と；を用いることを特徴とする。The method for producing a fiber-reinforced cylinder block according to the present invention includes a high-strength cylinder block body composed of a first reinforcing fiber and a light alloy matrix; a second reinforcing fiber integrated with the cylinder block body, In manufacturing a reinforced fiber cylinder block comprising a cylinder sleeve made of the light alloy matrix and having excellent wear resistance, a first reinforced fiber cylinder block having the shape of the cylinder block body is formed. A step of integrally bonding a fiber molded body and a second fiber molded body having the shape of the cylinder sleeve, which is composed of the second reinforcing fiber, to obtain a composite fiber molded body; and surrounding the composite fiber molded body A step of injecting a molten alloy made of a light alloy into a cavity for forming a cylinder block under a predetermined pressure higher than atmospheric pressure; Characterized by using the; and steps to completely solidify under high pressure above the pressure.
(2) 作 用 本発明に係る繊維強化シリンダブロックにおいて、その
シリンダブロック本体は高強度な繊維強化軽合金より構
成されるので、軽量で、且つ高強度であり、またシリン
ダスリーブは耐摩耗性の優れた繊維強化軽合金より構成
されるので、優秀な耐摩耗性および強度を有する。(2) Operation In the fiber-reinforced cylinder block according to the present invention, since the cylinder block body is made of high-strength fiber-reinforced light alloy, it is lightweight and has high strength, and the cylinder sleeve has wear resistance. Being composed of excellent fiber reinforced light alloy, it has excellent wear resistance and strength.
本発明に係る繊維強化シリンダブロックの製造方法にお
いては、シリンダブロック本体を強化する第１の繊維成
形体と、シリンダスリーブを強化する第２の繊維成形体
とを一体に結合するので、両繊維が混り合うことがな
く、両繊維の特性を十分に発揮させことができる。In the method for manufacturing a fiber-reinforced cylinder block according to the present invention, since the first fiber molded body that strengthens the cylinder block body and the second fiber molded body that strengthens the cylinder sleeve are integrally combined, both fibers are It is possible to fully exhibit the characteristics of both fibers without mixing them.
また鋳造に際して、その初期に溶湯を大気圧を上回る所
定の圧力下でキャビテイに注入するので、キャビテイへ
の溶湯の注入と同時に複合繊維成形体への溶湯の充填が
開始され、これにより複合繊維成形体への溶湯の充填能
率が向上する。In addition, during casting, the molten metal is injected into the cavity at a predetermined pressure higher than the atmospheric pressure at the initial stage, so that the molten fiber is started to be filled into the composite fiber molded body at the same time when the molten metal is injected into the cavity. The efficiency of filling molten metal into the body is improved.
その後、溶湯を前記圧力を上回る高圧下で完全凝固させ
るので、溶湯の圧力上昇過程で溶湯が複合繊維成形体に
完全に充填され、またマトリックスの金属組織が緻密化
してその強度が向上する。After that, since the molten metal is completely solidified under a high pressure exceeding the above pressure, the molten metal is completely filled in the composite fiber molded body in the process of increasing the pressure of the molten metal, and the metal structure of the matrix is densified to improve its strength.
(3) 実施例 第１〜第３図は、後述する複合繊維成形体により繊維強
化されたアルミニウム合金製サイアミーズ型シリンダブ
ロックＳを示し、そのシリンダブロックＳは、直列に並
ぶ複数、図示例は４個のシリンダバレル１１〜１４相互
を結合してなるサイアミーズシリンダバレル１、そのサ
イアミーズシリンダバレル１を囲繞する外壁部２および
外壁部２の下縁に連設されたクランクケース３を備えた
シリンダブロック本体４と、各シリンダバレル１１〜１
４におけるシリンダボア１ａを画成すべくシリンダブロ
ック本体４と一体のシリンダスリーブ５とより構成され
る。(3) Example FIGS. 1 to 3 show an aluminum alloy-made Siamese type cylinder block S fiber-reinforced by a composite fiber molded body to be described later. The cylinder block S is a plurality of cylinder blocks S arranged in series. number of cylinder barrel 1 1 to 1 4 Siamese cylinder barrel 1 composed by combining each other, a cylinder having a crankcase 3 provided continuously to the lower edge of the outer wall 2 and the outer wall 2 surrounding the Siamese cylinder barrel 1 Block main body 4 and each cylinder barrel 1 1 to 1
4 and a cylinder sleeve 5 integrated with the cylinder block body 4 to define a cylinder bore 1a.
サイアミーズシリンダバレル１と外壁部２間に、サイア
ミーズシリンダバレル１の全周が臨む水ジャケット６が
形成される。その水ジャケット６におけるシリンダヘッ
ド側の開口部において、サイアミーズシリンダバレル１
と外壁部２間は複数の補強デッキ型８により連結され、
相隣る補強デッキ部８間はシリンダヘッド側への連通口
７として機能する。これによりシリンダブロックＳはク
ローズドデッキ型に構成される。A water jacket 6 is formed between the Siamese cylinder barrel 1 and the outer wall portion 2 so as to cover the entire circumference of the Siamese cylinder barrel 1. At the opening on the cylinder head side of the water jacket 6, the Siamese cylinder barrel 1
The outer wall portion 2 and the outer wall portion 2 are connected by a plurality of reinforcing deck molds 8,
The space between the adjacent reinforcing deck portions 8 functions as a communication port 7 to the cylinder head side. As a result, the cylinder block S is constructed as a closed deck type.
シリンダブロック本体４は第１の強化繊維としての炭化
ケイ素繊維の短繊維とアルミニウム合金（ＪＩＳ ＡＤ
Ｃ１２）マトリックスより構成され、高強度である。The cylinder block body 4 comprises short fibers of silicon carbide fiber as the first reinforcing fiber and an aluminum alloy (JIS AD).
C12) It is composed of a matrix and has high strength.
またシリンダスリーブ５は第２の強化繊維としての炭素
繊維とアルミナ繊維との混合短繊維と前記アルミニウム
合金マトリックスより構成され、耐摩耗性に優れると共
に高強度である。The cylinder sleeve 5 is composed of a mixed short fiber of carbon fiber and alumina fiber as the second reinforcing fiber and the aluminum alloy matrix, and has excellent wear resistance and high strength.
第４図は、前記繊維強化シリンダスリーブ５と従来の鋳
鉄製シリンダスリーブとの摺動距離と摩耗減量の関係を
示す。図中、線（Ｉ）が繊維強化シリンダスリーブ５
に、また線（II）が鋳鉄製シリンダスリーブにそれぞれ
該当する。FIG. 4 shows the relationship between the sliding distance between the fiber reinforced cylinder sleeve 5 and the conventional cast iron cylinder sleeve and the wear reduction. In the figure, the line (I) indicates the fiber reinforced cylinder sleeve 5.
And the wire (II) corresponds to the cast iron cylinder sleeve.
前記炭素繊維とアルミナ繊維との混合短繊維は、耐摩耗
性に優れているので、これを用いた線（Ｉ）の繊維強化
シリンダスリーブ５は、線（II）の鋳鉄製シリンダスリ
ーブに比べて２倍以上摩耗減量が少なく、したがって優
秀な耐摩耗性を有することが明らかである。Since the mixed short fiber of the carbon fiber and the alumina fiber is excellent in wear resistance, the fiber-reinforced cylinder sleeve 5 of the line (I) using this is compared to the cast iron cylinder sleeve of the line (II). It is clear that the wear loss is more than doubled and therefore has excellent wear resistance.
一方、前記シリンダブロック本体４について、その引張
り強さを求めたところ４５Kg／mm２の値を示し、その引
張強さはＴ６処理を施された前記と同様のアルミニウム
合金製シリンダブロック本体の引張り強さ３２Kg／mm２
に比べて１．４倍以上である。On the other hand, the tensile strength of the cylinder block body 4 was found to be a value of 45 kg / mm 2 , and the tensile strength was the same as that of the aluminum alloy cylinder block body subjected to T6 treatment as described above. 32 kg / mm 2
1.4 times more than
したがって前記繊維強化アルミニウム合金製サイアミー
ズ型シリンダブロックＳは自動車用エンジンの高性能化
に十分に対応し得るものである。Therefore, the Siamese type cylinder block S made of fiber reinforced aluminum alloy can sufficiently cope with high performance of automobile engines.
第５図は、前記シリンダブロックＳを本発明方法に従い
鋳造した直後の状態（即ち鋳造後に必要な後加工を施す
前の状態）を示しており、次にそのシリンダブロック鋳
造のための鋳造装置について第６図〜第９図を参照して
説明する。即ち、その鋳造装置は金型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６，第７図において左右二つ割の第１および第２
側型１０１，１０２と、両側型１０１，１０２を摺動自
在に載置する下型１１とより構成される。FIG. 5 shows a state immediately after the cylinder block S is cast according to the method of the present invention (that is, a state before performing necessary post-processing after casting). Next, the casting apparatus for casting the cylinder block will be described. This will be described with reference to FIGS. 6 to 9. That is, the casting apparatus is provided with a mold M, and the mold M is provided with an upper mold 9 which can be raised and lowered, and a lower mold which is disposed below the upper mold 9 and is divided into left and right halves in FIG. 6 and FIG. And the second
It is composed of side molds 10 1 and 10 2 and a lower mold 11 on which both side molds 10 1 and 10 2 are slidably mounted.
上型９の下面に、両側型１０１，１０２と協働してサイ
アミーズシリンダバレル１および外壁部２を成形するた
めの第１キャビテイ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１３が
両側型１０１，１０２の上面に突設される。Formed on the lower surface of the upper mold 9 is a mold clamping recess 12 that defines a first cavity C 1 for molding the Siamese cylinder barrel 1 and the outer wall portion 2 in cooperation with the both-side molds 10 1 and 10 2 . A mold clamping projection 13 that fits into the recess 12 is provided on the upper surfaces of the double-sided molds 10 1 and 10 2 .
第８，第９図に示すように、下型１１に溶解炉（図示せ
ず）よりアルミニウム合金の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キャビテイＣ１の長手
方向に、且つそれと略同一長さに亘って延びる一対の湯
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ック１８を有し、その成
形ブロック１８は両側型１０１，１０２と協働してクラ
ンクケース３を成形するための第２キャビテイＣ２を画
成する。そのキャビテイＣ２の上端は前記第１キャビテ
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。これら第１，第２キャビテイ
Ｃ１，Ｃ２はシリンダブロック成形用キャビテイを構成
する。As shown in FIGS. 8 and 9, a lower mold 11 is provided with a molten metal reservoir 14 for receiving a molten aluminum alloy from a melting furnace (not shown).
A hot water supply cylinder 15 communicating with the hot water reservoir 14, a plunger 16 slidably fitted to the hot water supply cylinder 15, and two branches from the hot water reservoir 14 in the longitudinal direction of the first cavity C 1 and A pair of runners 17 extending over substantially the same length is provided. Further, the lower die 11 has a forming block 18 projecting upward between both runners 17, and the forming block 18 cooperates with the both-side dies 10 1 and 10 2 to form a second cavity for forming the crankcase 3. Define C 2 . The upper end of the cavity C 2 communicates with the first cavity C 1, and the lower ends on both sides communicate with both runners 17 via a plurality of weirs 19. These first and second cavities C 1 and C 2 form a cylinder block forming cavity.
成形ブロック１８は、所定の間隔で成形された背の高い
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はクランクジャ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キャビテイＣ２の容量の大きな部分に溶湯を早期に
注入するようになっている。The forming block 18 includes four tall first semi-cylindrical forming parts 18 1 formed at predetermined intervals, and adjacent first forming parts 18 1 and outermost first forming parts 18 1 . more becomes convex-shaped second molded part 18 2 located outside, each of the first mold portion 18 1 is used to mold the rotation space 20 for the crank pin and the crank arm (second, third panel),
Second forming unit 18 2 bearing holder 2 of the crank journal
1 (FIGS. 2 and 3). Each weir 19 is provided corresponding to each second molding portion 18 2 .
The molten metal is quickly injected into the large capacity portion of the second cavity C 2 .
両湯道１７は、湯溜部１４側より湯道先１７ａに向けて
断面積が段階的に減少するように、湯道１７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。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。Both runners 17 are formed such that the bottom surface of the runners 17 is in the form of several stairs rising from the side of the hot water reservoir 14 so that the cross-sectional area gradually decreases from the side of the hot water reservoir 14 toward the runner tip 17a. . The rising portions 17c connected to the step portions 17b are provided with molten metal at the weirs 19 respectively.
It is formed diagonally so that it can be smoothly guided to.
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キャビテイＣ２に注入し、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キャビテイＣ２に注入することができるので、そのキ
ャビテイＣ２内では両側下端よりその全長に亘って略水
平状態で湯面が上昇し、したがって溶湯がキャビテイＣ
２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。また溶湯の注入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 gradually reduced in this way,
In the part with a large cross-sectional area, a large amount of molten metal is dammed at a slow speed.
The second was injected into cavity C 2, and because the small portion of the cross-sectional area can be injected a small amount of the molten metal in the second cavity C 2 through weir 19 at a high speed through its from both sides lower end within the cavity C 2 The molten metal rises in a substantially horizontal state over the entire length, so that the molten metal is cavities C
It is possible to prevent gas such as air from being entrained in the molten metal and prevent the formation of cavities without causing turbulent flow in the inside of the chamber 2 . Also, since the molten metal injection work is performed efficiently,
Casting efficiency can be improved.
第６，第７図に明示するように、各第１成形部１８１の
頂面に後述する複合繊維成形体の位置決めを行う位置決
め突起２２が突設され、その位置決め突起２２の中心に
凹部２３が形成される。As clearly shown in FIGS. 6 and 7, a positioning projection 22 for positioning a composite fiber molded body, which will be described later, is provided on the top surface of each first molding portion 18 1 , and a recess 23 is formed at the center of the positioning projection 22. Is formed.
第１および第２側型１０１，１０２における第２キャビ
テイＣ１を画成する壁部の中央部分に、複合繊維成形
体、特に砂中子を固定するための中子受３１が２個所宛
設けられている。各中子受３１は砂中子の位置決めを行
う係合孔３１ａと、その開口部外周に形成されて砂中子
を挟持する挟持面３１ｂとよりなる。At the central portion of the wall defining the second cavity C 1 in the first and second side molds 10 1 and 10 2 , there are two core receptacles 31 for fixing a composite fiber molded body, particularly a sand core. It is provided for. Each core holder 31 includes an engagement hole 31a for positioning the sand core and a sandwiching surface 31b formed on the outer circumference of the opening for sandwiching the sand core.
上型９の型締め用凹部１２に、第１キャビテイ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キャ
ビテイＣ３および連通口７を成形するための第４キャビ
テイＣ４がそれぞれ形成され、また上型９に各第３キャ
ビテイＣ３および第４キャビテイＣ４に連通するガス抜
き孔３２，３３がそれぞれ形成される。A plurality of third cavities C 3 for communicating with the first cavity C 1 to overflow the molten metal and a fourth cavity C 4 for forming the communication port 7 are formed in the mold clamping recess 12 of the upper mold 9, respectively. Further, the upper mold 9 is formed with gas vent holes 32 and 33 communicating with the third cavity C 3 and the fourth cavity C 4 , respectively.
それらガス抜き孔３２，３３に閉鎖ピン３４，３５がそ
れぞれ遊挿され、それら閉鎖ピン３４，３５の上端部は
上型９の上方に配設される取付板３６に固定される。Closing pins 34 and 35 are loosely inserted into the gas vent holes 32 and 33, respectively, and upper ends of the closing pins 34 and 35 are fixed to a mounting plate 36 disposed above the upper die 9.
各ガス抜き孔３２，３３の、両キャビテイＣ３，Ｃ４に
対する連通端から上方へ所定の長さに亘って延びる小径
部３２ａ，３３ａは各閉鎖ピン３４，３５の下端部と嵌
合して第３キャビテイＣ３および第４キャビテイＣ４を
閉鎖し得るようになっている。Small-diameter portions 32a and 33a extending upward from the communication ends of the gas vent holes 32 and 33 to the cavities C 3 and C 4 for a predetermined length are fitted to the lower end portions of the closing pins 34 and 35, respectively. The third cavity C 3 and the fourth cavity C 4 can be closed.
上型９の上面と取付板３６間に油圧シリンダ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３４，３５により各小径部３２ａ，
３３ａを開閉するようになっている。４０は取付板３６
の案内ロッドである。A hydraulic cylinder 39 is interposed between the upper surface of the upper die 9 and the mounting plate 36, and the mounting plate 36 is moved up and down by the operation of the hydraulic cylinder 39 to cause the closing pins 34, 35 to move the small diameter portions 32a,
33a is adapted to be opened and closed. 40 is a mounting plate 36
It is a guide rod.
上型９の型締め用凹部１２天面に、各シリンダバレル１
１〜１４に対応して軸線を上、下方向に向けて配設した
シリンダボア成形用円柱状中子４１が突設され、各中子
４１の下端面に第１成形部１８１頂面の凹部２３に嵌合
し得る凸部４１ａが設けられる。Each cylinder barrel 1 is provided on the top surface of the mold clamping recess 12 of the upper mold 9.
1 to 1 4 on the axis corresponding to the cylinder bores molding cylindrical core 41 which is disposed toward the downward direction is projected, the first mold portion 18 1 a top surface on the lower end surface of each core 41 A convex portion 41a that can fit in the concave portion 23 is provided.
第１０，第１１図は水ジャケット用砂中子５９を示し、
その砂中子５９は、シリンダブロック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６０１〜６
０４を備えると共にそれらの相隣るもの相互の重合する
周壁を欠如させた中子本体６１と、水ジャケット６をシ
リンダヘッドの水ジャケットに連通する連通口７および
補強デッキ部８を形成すべく、中子本体６１の上端面に
突設された複数の突起６２と、中子本体６１のシリンダ
バレル配列方向両外側面、図示例は中間に位置する２本
の円筒部６０２，６０３の両外側面にそれぞれ突設され
た幅木６３とより構成される。各幅木６３は中子本体６
１と一体の大径部６３ａと、その端面に突設される小径
部６３ｂとより形成される。10 and 11 show a sand core 59 for a water jacket,
Its sand core 59 includes a cylinder block cylinder 60 1-6 four corresponding to the four cylinder barrel 1 1 to 1 4 S
To form a core body 61 which is provided with 0 4 and lacks peripheral walls where adjacent ones overlap with each other, a communication port 7 for communicating the water jacket 6 with the water jacket of the cylinder head, and a reinforcing deck portion 8. , a plurality of protrusions 62 protruding from the upper end surface of the core body 61, the cylinder barrel arrangement direction both outer surfaces of the core body 61, the illustrated example two positioned in the middle cylindrical portion 60 2, 60 3 It is composed of skirting boards 63 provided on both outer side surfaces. Each skirting board 63 is the core body 6
1 and a large-diameter portion 63a, and a small-diameter portion 63b protruding from the end surface of the large-diameter portion 63a.
以下、複合繊維成形体の製造について説明する。The production of the composite fiber molded body will be described below.
先ず、シリンダスリーブ５に用いられる第２の繊維成形
体の成形について述べると、炭素繊維とアルミナ繊維と
の混合短繊維にシリカゾルをバインダとして加え、吸引
付着成形法を適用してシリンダスリーブ５の形状を有す
る第２の繊維成形体ｆ２（第１２図）を成形する。First, the molding of the second fiber molded body used for the cylinder sleeve 5 is described. Silica sol is added as a binder to mixed short fibers of carbon fiber and alumina fiber, and the suction adhesion molding method is applied to form the shape of the cylinder sleeve 5. The second fibrous molded body f 2 (FIG. 12) having the above is molded.
前記吸引付着成形法とは、前記混合短繊維とシリカゾル
の混合物を入れた槽中に、両端面を密封した通気性を有
する円筒型を立設し、その円筒型の内部に吸引作用を施
して前記混合物を円筒型外周面に吸着させる手法をい
う。The suction adhesion molding method, in a tank containing a mixture of the mixed short fibers and silica sol, standing up a breathable cylindrical mold with both end surfaces sealed, and applying suction to the inside of the cylindrical mold. It refers to a method of adsorbing the mixture onto the cylindrical outer peripheral surface.
次に、シリンダブロック本体４に用いられる第１の繊維
成形体の成形について述べる。Next, the molding of the first fiber molded body used for the cylinder block body 4 will be described.
第１２図は第１図の繊維成形体の成形およびそれと第２
の繊維成形体ｆ２の結合に用いられる成形装置を示し、
その装置は、前記鋳造装置の第１，第２キャビテイ
Ｃ１，Ｃ２と同様の第１，第２キャビテイＦＣ１，ＦＣ
２を画成する、上型１０９と、左右二ツ割の第１および
第２側型１１０１，１１０２と、下型１１１とより構成
され、その下型１１１は第１および第２成形部１１
８１，１１８２を備えた成形ブロック１１８を有する。FIG. 12 shows the molding of the fiber molding of FIG.
Shows a molding apparatus used for bonding the fiber molded body f 2 of
The apparatus includes first the casting device, the second cavity C 1, a first similar to the C 2, a second cavity FC 1, FC
2 is defined by an upper mold 109, left and right split first and second side molds 110 1 and 110 2, and a lower mold 111, and the lower mold 111 is the first and second molding parts. 11
It has a forming block 118 with 8 1 , 118 2 .
また上型１０９の型締め用凹部１１２天面に、前記中子
４１と同様の円柱体１４１が設けられ、また上型１０９
に円柱体１４１を囲繞すると共に第１キャビテイＦＣ１
の天面を画成する押え部材２４が昇降自在に摺合され
る。押え部材２４の下面には砂中子５９の突起６２と嵌
合する凹部２４ａが形成される。Further, a cylindrical body 141 similar to the core 41 is provided on the top surface of the mold clamping recess 112 of the upper mold 109.
The columnar body 141 is surrounded by the first cavity FC 1
The pressing member 24 that defines the top surface of the is slidably slidable. On the lower surface of the pressing member 24, a concave portion 24a that fits with the protrusion 62 of the sand core 59 is formed.
さらに両側型１１０１，１１０２には前記中子受３１と
同様の中子受１３１が設けられる。各中子受１３１は前
記と同様に係合孔１３１ａと挟持面１３１ｂとよりな
る。Further, the two-sided molds 110 1 and 110 2 are provided with a core support 131 similar to the core support 31. Each core support 131 is composed of an engagement hole 131a and a holding surface 131b as described above.
両側型１１０１，１１０２、下型１１１および円柱体１
４１に、各キャビテイＦＣ１，ＦＣ２に開口する多数の
吸引孔２５が設けられ、それら吸引孔２５は導管２６を
介して真空ポンプ（図示せず）に接続される。Double-sided molds 110 1 and 110 2 , lower mold 111 and cylindrical body 1
41 is provided with a large number of suction holes 25 opening to the cavities FC 1 and FC 2 , and these suction holes 25 are connected to a vacuum pump (not shown) via a conduit 26.
第２の繊維成形体の成形に当たっては、上型１０９を上
昇させ、また両側型１１０１，１１０２を互いに離間す
るように移動させて型開きを行う。下型１１１における
各第１成形部１１８１頂面の位置決め突起１２２に前記
第１の成形体ｆ２の下端開口部を嵌合してその成形体ｆ
２を下型１１１に立設する。また砂中子５９を図示しな
い仮設置部材を介して下型１１１の上方に配設する。In molding the second fiber molded body, the upper mold 109 is raised and the both side molds 110 1 and 110 2 are moved so as to be separated from each other to perform mold opening. The lower end opening of the first molded body f 2 is fitted into the positioning protrusion 122 on the top surface of each first molded portion 118 1 of the lower die 111, and the molded body f is formed.
2 is erected on the lower mold 111. Further, the sand core 59 is arranged above the lower mold 111 via a temporary installation member (not shown).
両側型１１０１，１１０２をそれらが互いに接近する方
向に所定距離移動させ、各中子受１３１と各幅木６３と
を係合して砂中子５９の固定を行う。即ち、各中子受１
３１の係合孔１３１ａに砂中子５９における各幅木６３
の小径部６３ｂを嵌合して砂中子５９を位置決めし、ま
た各大径部６３ａのシリンダバレル配列方向と平行な端
面を各中子受１３１の挟持面１３１ｂに衝合して砂中子
５９をそれら挟持面１３１ｂにより挟持するものであ
る。The two-sided molds 110 1 and 110 2 are moved by a predetermined distance in a direction in which they approach each other, and each core support 131 and each skirting board 63 are engaged to fix the sand core 59. That is, each core receiver 1
Each of the skirting boards 63 in the sand core 59 is provided in the engaging hole 131a of 31.
The sand core 59 is positioned by fitting the small diameter portion 63b of the sand core 59, and the end surfaces of the large diameter portions 63a parallel to the cylinder barrel arrangement direction are abutted against the sandwiching surface 131b of each core receiver 131. 59 is clamped by the clamping surfaces 131b.
上型１０９を下降させ、円柱体１４１を第２の繊維成形
体ｆ２に嵌合し、また型締め用凹部１１２を両側型１１
０１，１１０２の型締め用凸部１１３に嵌合して型締め
を行う。この型締め操作により砂中子５９の仮設置部材
は第１キャビテイＦＣ１より退出する。The upper mold 109 is lowered, the columnar body 141 is fitted into the second fibrous molded body f 2 , and the mold clamping recess 112 is formed on both side molds 11.
The mold is clamped by fitting it into the mold clamping projections 113 of 0 1 and 110 2 . By this mold clamping operation, the temporary installation member of the sand core 59 is withdrawn from the first cavity FC 1 .
上型１０９より上方へ押え部材２４を上昇させて上型１
０９に開口部２７を形成する。The pressing member 24 is moved upward from the upper mold 109 to raise the upper mold 1.
The opening 27 is formed at 09.
炭化ケイ素繊維にシリカゾルをバインダとして加えた泥
状成形材料を調製し、その材料を前記開口部２７より第
１，第２キャビテイＦＣ１，ＦＣ２に充填し、押え部材
２４を下降させて開口部２７を塞ぐと共に第１キャビテ
イＦＣ１の天面を画成し、シリンダブロック本体４の形
状を有する第１の繊維成形体ｆ１を成形すると共にそれ
と第２の繊維成形体ｆ２とを結合し、未乾燥の複合繊維
成形体Ｆを得る。この場合真空ポンプを作動して各吸引
孔２５を通じ、余分なバインダを除去する。A mud-like molding material is prepared by adding silica sol as a binder to silicon carbide fiber, the material is filled into the first and second cavities FC 1 and FC 2 through the opening 27, and the pressing member 24 is lowered to open the opening. 27 is closed and the top surface of the first cavity FC 1 is defined to form a first fiber molded body f 1 having the shape of the cylinder block body 4, and the second fiber molded body f 2 is joined to the first fiber molded body f 1. A undried composite fiber molded body F is obtained. In this case, the vacuum pump is operated to remove excess binder through the suction holes 25.
成形装置を乾燥炉に設置して複合繊維成形体Ｆを１２０
℃にて２８時間加熱乾燥する。The molding apparatus is installed in the drying furnace and the composite fiber molding F is set to 120
Heat-dry at 28 ° C. for 28 hours.
離型御、複合繊維成形体Ｆを焼成炉に設置してＮ２ガス
雰囲気中にて焼成する。The mold release and the composite fiber molded body F are installed in a firing furnace and fired in an N 2 gas atmosphere.
この焼成処理は、第１３図に示すように、４００℃にて
２時間の第１加熱工程Ｈ１、７００℃にて３時間の第２
加熱工程Ｈ２、２時間の炉冷工程Ｆｃ、空冷工程Ａｃを
経て行われる。As shown in FIG. 13, this baking treatment includes a first heating step H 1 at 400 ° C. for 2 hours and a second heating step H 1 at 700 ° C. for 3 hours.
The heating process H 2 is performed through the furnace cooling process Fc and the air cooling process Ac for 2 hours.
かくして、繊維体積含有率（Ｖｆ）が１０〜２０％でシ
リンダブロックＳの形状を有し、また砂中子５９を包含
する硬化複合繊維成形体Ｆが得られる。Thus, a cured composite fiber molded body F having a fiber volume content (Vf) of 10 to 20%, the shape of the cylinder block S, and including the sand core 59 is obtained.
次に前記複合繊維成形体Ｆを用いた前記鋳造装置による
シリンダブロックＳの鋳造作業について説明する。Next, the casting operation of the cylinder block S by the casting apparatus using the composite fiber molded body F will be described.
先ず第６図に示すように上型９を上昇させ、また両側型
１０１，１０２を互いに離間するように移動させて型開
きを行う。上型９上の油圧シリンダ３９を作動させて取
付板３６を介し各閉鎖ピン３４，３５を上昇させ、それ
らの下端部を第３，第４キャビテイＣ３，Ｃ４に連通す
る小径部３２ａ，３３ａの上部開口近傍に位置させて各
上部開口の開度を絞る。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. 6, the upper mold 9 is lifted, and the both side molds 10 1 and 10 2 are moved so as to be separated from each other to perform mold opening. The hydraulic cylinder 39 on the upper die 9 is operated to raise the respective closing pins 34, 35 via the mounting plate 36, and the lower end portions thereof are communicated with the third and fourth cavities C 3 , C 4, and the small diameter portion 32a, The openings 33a are located near the upper openings to narrow the opening of each upper opening. Further, the plunger 16 in the hot water supply cylinder 15 is lowered.
１００〜４００℃に予熱された複合繊維成形体Ｆを、下
型１１の成形ブロック１８に装着し、その第２の繊維成
形体ｆ２の下端開口部を第１成形部１８１頂面の位置決
め突起２２に嵌合して複合繊維成形体Ｆの位置決めを行
う。The composite fiber molded body F preheated to 100 to 400 ° C. is mounted on the molding block 18 of the lower mold 11, and the lower end opening of the second fiber molded body f 2 is positioned on the top surface of the first molded portion 18 1. The composite fiber molded body F is positioned by fitting with the protrusions 22.
第７図に示すように、両側型１０１，１０２をそれがら
互いに接近する方向に所定距離移動させ、各中子受３１
と各幅木６３とを係合して、前記成形作業時と同様に砂
中子５９の固定を行う。As shown in FIG. 7, the two-sided molds 10 1 and 10 2 are moved by a predetermined distance in a direction in which they approach each other, and each core holder 31
And each skirting board 63 are engaged with each other to fix the sand core 59 in the same manner as in the molding operation.
次いで上型９を下降させ、中子５９を複合繊維成形体Ｆ
の第２の繊維成形体ｆに嵌入し、その凸部４１ａを第１
成形部１８１頂面の凹部２３に嵌合する。また砂中子５
９の各突起６２が各第４キャビテイＣ４に遊挿され、さ
らに上型９の型締め用凹部１２が両側型１０１，１０２
の型締め用凸部１３に嵌合して型締めが行われる。Next, the upper die 9 is lowered to move the core 59 to the composite fiber molding F.
The second fibrous molded body f of
It is fitted into the concave portion 23 on the top surface of the molding portion 18 1 . Also sand core 5
Each of the protrusions 62 of 9 is loosely inserted into each of the fourth cavities C 4, and the mold clamping recess 12 of the upper mold 9 is further provided on both side molds 10 1 , 10 2.
The mold is clamped by being fitted to the mold clamping convex portion 13.
下型１１の湯溜部１４に溶解炉より７８０℃のアルミニ
ウム合金（ＪＩＳ ＡＤＣ１２）の溶湯を供給し、プラ
ンジヤ１６を所定の速度で上昇させて溶湯を両湯道１７
より堰１９を通じて第２キャビテイＣ２の両下部よりそ
のキャビテイＣ２および第１キャビテイＣ１に注入す
る。両キャビテイＣ１，Ｃ２内の空気等のガスは、溶湯
により押し上げられて第３，第４キャビテイＣ３，Ｃ４
に連通するガス抜き孔３２，３３を経て上型９の上方へ
抜ける。A molten metal of 780 ° C. aluminum alloy (JIS ADC12) is supplied to the molten metal reservoir 14 of the lower mold 11 from the melting furnace, and the plunger 16 is raised at a predetermined speed to move the molten metal to both the runners 17
It is injected into the cavities C 2 and the first cavities C 1 from both lower portions of the second cavities C 2 through the weirs 19. Gases such as air in both cavities C 1 and C 2 are pushed up by the molten metal and are pushed up by the third and fourth cavities C 3 and C 4.
Through the gas vent holes 32 and 33 communicating with the upper mold 9.
この場合両湯道１７は前述のように湯道先１７ａに向け
て断面積が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１
９を通じて第２キャビテイＣ２に、その両下部よりその
全長に亘って略均等に注入される。In this case, since the both runways 17 are formed in a step-like shape of several steps from the side of the hot water reservoir 14 so that the cross-sectional area gradually decreases toward the runway tip 17a as described above, As the plunger 16 rises, the molten metal will flow from both runways 17 to each weir 1.
Through 9 the second cavity C 2 is injected substantially evenly from the lower portions of the second cavity C 2 over its entire length.
この押上げ法の適用により第１，第２キャビテイＣ１，
Ｃ２内では湯面が略水平状態で上昇し、同時にガス抜き
孔３２，３３における小径部３２ａ，３３ａの開度が絞
られていることにより第１４図に示すように溶湯の注入
圧が大気圧を上回る圧力ｐ１（１０〜２００Kg／cm2）
となり、その結果溶湯が第１，第２キャビテイＣ１，Ｃ
２内へ注入されると同時に複合繊維成形体Ｆへの溶湯の
充填がその下部から順次開始される。この場合繊維成形
体Ｆが前記温度に予熱され、溶湯の保温が行われている
こともあって、溶湯の充填能率が向上する。また複合繊
維成形体Ｆ内の空気等のガスは溶湯により押し出されて
上方へ抜けるのでガス抜き性が良好となる。その上、湯
面が略水平状態で上昇することにより溶湯へのガスの巻
込みが防止され、したがって巣の発生が回避される。By applying this lifting method, the first and second cavities C 1 ,
In C 2 , the level of the molten metal rises in a substantially horizontal state, and at the same time, the openings of the small diameter portions 32a, 33a in the gas vent holes 32, 33 are narrowed, so that the injection pressure of the molten metal is large as shown in FIG. Pressure more than atmospheric pressure p 1 (10-200Kg / cm 2 )
As a result, the molten metal becomes the first and second cavities C 1 , C
At the same time as the injection into the composite fiber molding 2 , the filling of the composite fiber molded body F with the molten metal is sequentially started from the lower part thereof. In this case, since the fiber molded body F is preheated to the above temperature and the temperature of the molten metal is kept warm, the filling efficiency of the molten metal is improved. Further, gas such as air in the composite fiber molded body F is pushed out by the molten metal and escapes upward, so that the degassing property becomes good. Moreover, the rise of the molten metal surface in a substantially horizontal state prevents gas from being entrained in the molten metal, thus avoiding the formation of cavities.
第３，第４キャビテイＣ３，Ｃ４に溶湯が完全に注入さ
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３４，３５によって両
キャビテイＣ３，Ｃ４に連通する小径部３２ａ，３３ａ
を閉鎖する。When the molten metal is completely poured into the third and fourth cavities C 3 and C 4 , the hydraulic cylinder 39 on the upper mold 9 is operated to lower the mounting plate 36, and the closing pins 34 and 35 are used to move both cavities C and C. 3, the small diameter portion 32a which communicates with the C 4, 33a
To close.
その後プランジヤ１６を所定の速度で上昇させて溶湯
を、前記圧力ｐ１を上回る高圧力ｐ２（２００〜５００
Kg／cm2）下に保持して完全に凝固させ、マトリックス
であるアルミニウム合金の組織を緻密化してその強度の
向上を図る。この場合複合繊維成形体Ｆに対する溶湯の
充填は、溶湯の圧力が１０〜５０Kg／cm2で行われるの
で溶湯充填中に複合繊維成形体Ｆが溶湯により破壊され
ることはない。Thereafter, the plunger 16 is raised at a predetermined speed so that the molten metal is heated to a high pressure p 2 (200 to 500) exceeding the pressure p 1.
(Kg / cm 2 ) to completely solidify the structure, and to densify the structure of the aluminum alloy matrix to improve its strength. In this case, since the molten metal is filled in the composite fiber molded body F at a pressure of 10 to 50 kg / cm 2 , the composite fiber molded body F is not destroyed by the molten metal during the filling of the molten metal.
砂中子５９は、それの各幅木６３を介して両側型１
０１，１０２により正確な位置に挟持されているので、
第１，第２キャビテイＣ１，Ｃ２内への溶湯の注入時お
よびそれらキャビテイＣ１，Ｃ２内の溶湯の加圧時にお
いて砂中子５９が浮き上がったりすることがない。また
各幅木６３の大径部６３ａの端面が両側型１０１，１０
２における中子受３１の挟持面３１ｂに衝合しているの
で、砂中子５９が脹らみ傾向になると、その変形力は各
挟持面３１ｂにより支承され、これにより砂中子５９の
変形が防止されて各シリンダボア１ａ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 sand core 59 is a double-sided mold 1 through each skirting board 63 thereof.
Since it is clamped by 0 1 , 10 2 in the correct position,
The sand core 59 does not float when the molten metal is poured into the first and second cavities C 1 and C 2 and when the molten metal in the cavities C 1 and C 2 is pressurized. In addition, the end surface of the large diameter portion 63a of each skirting board 63 is a double-sided mold 10 1 , 10
Since abuts the clamping face 31b of the core receiving 31 at 2 and tends sand core 59 bulges, its deformation force is supported by the sandwiching surface 31b, thereby the deformation of the sand core 59 Thus, the Siamese cylinder barrel 1 having a uniform wall thickness around each cylinder bore 1a can be obtained.
溶湯が凝固を完了した後、型開きを行うと第５図に示す
状態のシリンダブロックＳが得られる。When the mold is opened after the solidification of the molten metal is completed, the cylinder block S in the state shown in FIG. 5 is obtained.
このシリンダブロックＳに研削加工を施して、各第４キ
ャビテイＣ４と砂中子５９の各突起６２との協働により
成形された各突起部６４を除去すると各連通口７および
補強デッキ部８が形成され、また砂抜きを行うことによ
り水ジャケット６が得られ、さらに各シリンダボア１ａ
の内周面に真円加工を施し、さらにまたその他の必要な
所定の後加工を施すと第１〜第３図に示す状態のシリン
ダブロックＳが得られる。By grinding the cylinder block S and removing the protrusions 64 formed by the cooperation of the fourth cavities C 4 and the protrusions 62 of the sand core 59, the communication ports 7 and the reinforcement deck 8 are removed. Is formed, and the water jacket 6 is obtained by performing sand removal, and further, each cylinder bore 1a is formed.
When the inner peripheral surface of the cylinder is subjected to perfect circle processing and other necessary predetermined post-processing is further performed, the cylinder block S in the state shown in FIGS. 1 to 3 is obtained.
なお、第１の繊維成形体ｆ１を複数種類の強化繊維よ
り、また第２の繊維成形体ｆ２を一種類の強化繊維より
それぞれ成形してもよい。さらに軽合金マトリックスと
しては前記アルミニウム合金の外にマグネシウム合金等
が用いられる。The first fiber molded body f 1 may be molded from a plurality of types of reinforcing fibers, and the second fiber molded body f 2 may be molded from a single type of reinforcing fiber. In addition to the aluminum alloy, magnesium alloy or the like is used as the light alloy matrix.
Ｃ．発明の効果 本発明に係る繊維強化シリンダブロックにおいて、その
シリンダブロック本体は高強度な繊維強化軽合金より構
成されるので、軽量で、且つ高強度であり、またシリン
ダスリーブは耐摩耗性の優れた繊維強化軽合金より構成
されるので優秀な耐摩耗性および強度を有しており、従
って、エンジンの高性能化に十分に対応し得る諸特性を
具備した極めて高性能のシリンダブロックを提供するこ
とができる。C. EFFECTS OF THE INVENTION In the fiber reinforced cylinder block according to the present invention, since the cylinder block body is made of high strength fiber reinforced light alloy, it is lightweight and has high strength, and the cylinder sleeve has excellent wear resistance. Since it is composed of a fiber-reinforced light alloy, it has excellent wear resistance and strength. Therefore, it is necessary to provide an extremely high-performance cylinder block having various characteristics that can sufficiently correspond to the high performance of the engine. You can
また本発明に係る繊維強化シリンダブロックの製造方法
においては、そのシリンダブロックの鋳造前に予め、シ
リンダブロック本体を強化する第１の繊維成形体と、シ
リンダスリーブを強化する第２の繊維成形体とを一体に
結合するので、両繊維が混り合うことがなく、両繊維の
特性を十分に発揮させることができる。Further, in the method for manufacturing a fiber reinforced cylinder block according to the present invention, a first fiber molded body that strengthens the cylinder block body and a second fiber molded body that strengthens the cylinder sleeve are preliminarily formed before casting the cylinder block. Since the fibers are integrally bonded, the fibers are not mixed with each other, and the characteristics of the fibers can be sufficiently exhibited.
また鋳造に際して、その初期に溶湯を大気圧を上回る所
定の圧力下でキャビテイに注入するので、キャビテイへ
の溶湯の注入と同時に複合繊維成形体への溶湯の充填が
開始され、これにより複合繊維成形体への溶湯の充填能
率が向上する。In addition, during casting, the molten metal is injected into the cavity at a predetermined pressure higher than the atmospheric pressure at the initial stage, so that the molten fiber is started to be filled into the composite fiber molded body at the same time when the molten metal is injected into the cavity. The efficiency of filling molten metal into the body is improved.
その後、溶湯を前記圧力を上回る高圧下で完全凝固させ
るので、溶湯の圧力上昇過程で溶湯が複合繊維成形体に
完全に充填され、またマトリックスの金属組織が緻密化
してその強度が向上する。After that, since the molten metal is completely solidified under a high pressure exceeding the above pressure, the molten metal is completely filled in the composite fiber molded body in the process of increasing the pressure of the molten metal, and the metal structure of the matrix is densified to improve its strength.
したがって、前記方法によれば、シリンダブロック本体
およびシリンダスリーブを確実に且つ均一に繊維強化し
た巣の発生の無い繊維強化シリンダブロックを能率良く
製造することができる。Therefore, according to the above method, it is possible to efficiently and efficiently manufacture the fiber-reinforced cylinder block in which the cylinder block main body and the cylinder sleeve are reliably and uniformly fiber-reinforced without generation of cavities.
第１乃至第３図は本発明の一実施例に係るサイアミーズ
型シリンダブロックの最終形態を示し、第１図は上方か
らみた斜視図、第２図は第１図II−II線断面図、第２Ａ
図は第２図IIａ−IIａ線断面図、第３図は下方から見た
斜視図、第４図はシリンダスリーブの摺動距離と摩耗減
量の関係を示すグラフ、第５図は前記サイアミーズ型シ
リンダブロックの鋳造直後の状態を示す、第１図と同様
の斜視図、第６図は鋳造装置の型開き時の縦断正面図、
第７図は鋳造装置の型閉め時の縦断正面図、第８図は第
７図VIII−VIII線断面図、第９図は第８図IX−IX線断面
図、第１０図は砂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図は複合繊維成
形体用成形装置の型閉め時の縦断正面図、第１３図は複
合繊維成形体の焼成処理における時間と温度の関係を示
すグラフ、第１４図は溶湯の圧力と時間の関係を示すグ
ラフである。 Ｃ１，Ｃ２……シリンダブロック成形用キャビテイを構
成する第１，第２キャビテイ、Ｆ……複合繊維成形体、
ｆ１，ｆ２……第１，第２の繊維成形体、Ｓ……サイア
ミーズ型シリンダブロック、４……シリンダブロック本
体、５……シリンダスリーブ1 to 3 show a final form of a Siamese type cylinder block according to an embodiment of the present invention, FIG. 1 is a perspective view seen from above, FIG. 2 is a sectional view taken along line II-II of FIG. 2A
Fig. 2 is a sectional view taken along the line IIa-IIa in Fig. 2, Fig. 3 is a perspective view seen from below, Fig. 4 is a graph showing the relationship between the sliding distance of the cylinder sleeve and the wear reduction, and Fig. 5 is the Siamese type cylinder. FIG. 6 is a perspective view similar to FIG. 1, showing a state immediately after casting of the block, and FIG. 6 is a vertical cross-sectional front view of the casting apparatus when the mold is opened,
Fig. 7 is a vertical sectional front view of the casting apparatus when the mold is closed, Fig. 8 is a sectional view taken along line VIII-VIII of Fig. 7, Fig. 9 is a sectional view taken along line IX-IX of Fig. 8, and Fig. 10 is a sand core. FIG. 11 is a perspective view seen from above, FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 10, FIG. 12 is a vertical cross-sectional front view of the molding apparatus for the composite fiber molded body when the mold is closed, and FIG. FIG. 14 is a graph showing the relationship between time and temperature in the baking treatment, and FIG. 14 is a graph showing the relationship between molten metal pressure and time. C 1 , C 2 ... First and second cavities constituting a cylinder block forming cavity, F ... Composite fiber molded body,
f 1 , f 2 ... First and second fiber molded bodies, S ... Siamese type cylinder block, 4 ... Cylinder block body, 5 ... Cylinder sleeve
Claims (2)
より構成される高強度なシリンダブロック本体（４）
と；該シリンダブロック本体（４）と一体化され、第２
の強化繊維および前記軽合金マトリックスより構成され
る耐摩耗性の優れたシリンダスリーブ（５）と；よりな
る繊維強化シリンダブロック。1. A high-strength cylinder block body (4) composed of a first reinforcing fiber and a light alloy matrix.
And; integrated with the cylinder block body (4), the second
A fiber reinforced cylinder block comprising: a cylinder sleeve (5) having excellent wear resistance, which is composed of the reinforced fiber and the light alloy matrix.
より構成される高強度なシリンダブロック本体（４）
と；該シリンダブロック本体（４）と一体化され、第２
の強化繊維および前記軽合金マトリックスより構成され
る耐摩耗性の優れたシリンダスリーブ（５）と；よりな
る繊維強化シリンダブロック（Ｓ）を製造するに当り、
前記第１の強化繊維よりなり、前記シリンダブロック本
体（４）の形状を有する第１の繊維成形体（ｆ１）と、
前記第２の強化繊維よりなり、前記シリンダスリーブ
（５）の形状を有する第２の繊維成形体（ｆ２）とを一
体に結合して複合繊維成形体（Ｆ）を得る行程と；前記
複合繊維成形体（Ｆ）を囲繞するシリンダブロック成形
用キャビテイ（Ｃ１，Ｃ２）に軽合金よりなる溶湯を、
大気圧を上回る所定の圧力下で注入する工程と；前記溶
湯を前記圧力を上回る高圧下で完全凝固させる工程と；
を用いることを特徴とする繊維強化シリンダブロックの
製造方法。2. A high-strength cylinder block body (4) composed of a first reinforcing fiber and a light alloy matrix.
And; integrated with the cylinder block body (4), the second
In order to manufacture a fiber reinforced cylinder block (S), which comprises a cylinder sleeve (5) having excellent wear resistance, which is composed of the reinforced fiber and the light alloy matrix described above,
A first fiber molded body (f 1 ) made of the first reinforcing fiber and having the shape of the cylinder block body (4);
A step of forming a composite fiber molded body (F) by integrally bonding with a second fiber molded body (f 2 ) made of the second reinforcing fiber and having the shape of the cylinder sleeve (5); The cylinder block forming cavities (C 1 , C 2 ) surrounding the fiber molded body (F) are filled with a molten metal made of a light alloy,
Injecting under a predetermined pressure above atmospheric pressure; completely solidifying the melt under high pressure above the pressure;
A method for manufacturing a fiber reinforced cylinder block, characterized by using.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19043585A JPH0652059B2 (en) | 1985-08-29 | 1985-08-29 | Fiber reinforced cylinder block and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19043585A JPH0652059B2 (en) | 1985-08-29 | 1985-08-29 | Fiber reinforced cylinder block and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6251739A JPS6251739A (en) | 1987-03-06 |
| JPH0652059B2 true JPH0652059B2 (en) | 1994-07-06 |
Family
ID=16258084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19043585A Expired - Fee Related JPH0652059B2 (en) | 1985-08-29 | 1985-08-29 | Fiber reinforced cylinder block and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0652059B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6427451U (en) * | 1987-08-07 | 1989-02-16 |
-
1985
- 1985-08-29 JP JP19043585A patent/JPH0652059B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6251739A (en) | 1987-03-06 |
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