JPS6246268B2 - - Google Patents
Info
- Publication number
- JPS6246268B2 JPS6246268B2 JP58210673A JP21067383A JPS6246268B2 JP S6246268 B2 JPS6246268 B2 JP S6246268B2 JP 58210673 A JP58210673 A JP 58210673A JP 21067383 A JP21067383 A JP 21067383A JP S6246268 B2 JPS6246268 B2 JP S6246268B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- fiber
- cavity
- sprue
- rod
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 66
- 239000002184 metal Substances 0.000 claims description 66
- 239000000835 fiber Substances 0.000 claims description 41
- 238000000465 moulding Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 9
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 238000009931 pascalization Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 description 12
- 230000007547 defect Effects 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 239000003733 fiber-reinforced composite Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000000879 optical micrograph Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
Description
【発明の詳細な説明】
本発明は繊維強化コンロツドの製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing fiber reinforced connecting rods.
本出願人は先に、一端に存する大端部成形部
と、他端に存する小端部成形部と、両成形部を連
通する桿部成形部とよりなるコンロツド成形用キ
ヤビテイの前記大端部成形部を湯口に連通させた
金型を用い、前記桿部成形部に、その長手方向に
延びるように強化用棒状繊維成形体を配設した
後、前記キヤビテイに溶湯を充填し、次いでその
溶湯を静水的高圧力を以て加圧することにより該
繊維成形体に充填する、高圧凝固鋳造法を適用し
た繊維強化コンロツドの製造方法を提案している
（特開昭58−128264号公報参照）。前記のように大
容積の大端部成形部を湯口に連通する理由は、湯
回り性を良好にするためには容積の大きな部分を
湯口側に配設することが必要だからである。 The present applicant has previously proposed that the large end of a connecting rod molding cavity is composed of a large end molded part existing at one end, a small end molded part located at the other end, and a rod molded part communicating both molded parts. Using a mold in which the molding part communicates with a sprue, a reinforcing rod-shaped fiber molded body is arranged in the rod molding part so as to extend in the longitudinal direction, and then the cavity is filled with molten metal, and then the molten metal is poured into the cavity. has proposed a method for manufacturing a fiber-reinforced connecting rod using a high-pressure solidification casting method, in which the fibrous molded body is filled by hydrostatically applying high pressure to the fiber-reinforced conrod (see Japanese Patent Laid-Open No. 128264/1983). The reason why the large-volume large end molded portion is communicated with the sprue as described above is that it is necessary to arrange the large-volume portion on the sprue side in order to improve the running performance of the sprue.
ところで上記方法を実施するに当り本発明者は
次のような事実を究明した。即ち、キヤビテイ内
に充填した溶湯に高温溶融状態のまま直ちに静水
的高圧力を付与すると、溶湯が十分に冷却（凝固
収縮）されないうちに加圧工程が完了してしま
い、その後の冷却（凝固収縮）の際に溶湯は十分
な静水的高圧力を受けることなく凝固するので、
製品のマトリツクス部分に収縮に因る引け巣や微
細欠陥を生じ易く、特に繊維強化複合部のマトリ
ツクス部分に微細欠陥等を生じると、繊維成形体
内部にマトリツクスを十分に充填複合させること
ができず、その充填効率が低下するという不都合
がある。従つてかかる不都合を回避するために
は、キヤビテイに溶湯を充填した後その溶湯が半
凝固状態となるのを待つてからそれに静水的高圧
力を付与することが望ましいが、その場合、キヤ
ビテイ内の溶湯全部に同時に静水的高圧力を付与
したのでは、次に述べる理由により、前記不都合
を回避し得ない。 By the way, in carrying out the above method, the present inventor investigated the following fact. In other words, if high hydrostatic pressure is applied immediately to the molten metal filled in the cavity while it is in a high-temperature molten state, the pressurization process will be completed before the molten metal has sufficiently cooled (solidification shrinkage), and subsequent cooling (solidification contraction) will occur. ), the molten metal solidifies without being subjected to sufficient high hydrostatic pressure.
Shrinkage cavities and fine defects are likely to occur in the matrix portion of the product due to shrinkage, and in particular, if fine defects occur in the matrix portion of the fiber reinforced composite part, the matrix cannot be sufficiently filled and composited inside the fiber molded product. , there is a disadvantage that the filling efficiency is reduced. Therefore, in order to avoid such inconvenience, it is desirable to fill the cavity with molten metal and wait for the molten metal to become semi-solidified before applying high hydrostatic pressure to it. If high hydrostatic pressure is applied to all of the molten metal at the same time, the above-mentioned disadvantages cannot be avoided for the following reasons.
即ち、前記方法において湯口に近い大端部成形
部の溶湯はその湯口より保温作用を受け、また容
量も多いので湯温が降下しにくく、一方、湯口よ
り遠い小端部成形部の溶湯は、その湯口より保温
作用を受けず、また小断面積の桿部成形部を流通
する際に、その成形部および繊維成形体により熱
を奪われ、その上容量も少ないので湯温が降下し
易くなり、その結果、繊維成形体の両端部近傍に
おける各溶湯が所定の半凝固状態に至る時間が相
違する。このような状況下で、大端部成形部およ
び小端部成形部の溶湯に、キヤビテイ外の共通の
加圧プランジヤを以て同時に静水的高圧力を付与
したのでは、製品の特に大端部側のマトリツクス
に前記不都合を生じ易いのである。 That is, in the above method, the molten metal in the large end molding part near the sprue receives heat insulation from the sprue and has a large capacity, so the temperature of the molten metal is difficult to drop, while the molten metal in the small end molding part far from the sprue It does not receive any heat retention effect from the sprue, and when it flows through the molded part of the rod part with a small cross-sectional area, heat is taken away by the molded part and the fiber molded body.Furthermore, the water temperature is easy to drop because the capacity is small. As a result, the time required for each molten metal to reach a predetermined semi-solid state in the vicinity of both ends of the fiber molded body is different. Under these circumstances, applying high hydrostatic pressure to the molten metal of the large end molding section and the small end molding section at the same time using a common pressurizing plunger outside the cavity will damage the product, especially on the large end side. The above-mentioned disadvantages are likely to occur in the matrix.
また一般に繊維成形体へのマトリツクスの充填
効率を向上させるためには、繊維成形体における
マトリツクス溶湯の浸入を許容する表面積ができ
る限り広い方が良いが、前記方法においては、繊
維形成体の両端部を小端部成形部に突出するピス
トンピン孔成形用中子および大端部成形部に突出
するクランクピン孔形成用中子の両切欠きに嵌込
んでいるので、繊維成形体の両端面が両切欠きに
より殆ど閉鎖されてしまい、その分繊維成形体の
表面積が減少するという不具合もある。 Generally, in order to improve the filling efficiency of the matrix into the fiber molded product, it is better that the surface area of the fiber molded product that allows the penetration of the molten matrix to be as wide as possible. are fitted into both notches of the piston pin hole forming core protruding from the small end molding part and the crank pin hole forming core protruding from the large end molding part, so that both end surfaces of the fiber molded body are There is also the problem that most of the notches are closed, and the surface area of the fiber molded article is reduced accordingly.
本発明は上記に鑑み提案されたもので、上記不
都合、不具合をすべて解消できるようにして、繊
維成形体に対するマトリツクス溶湯の充填効率を
著しく向上させた前記製造方法を提供することを
目的とし、その特徴とするところは、一端に存す
る大端部成形部と、他端に存する小端部成形部
と、両成形部を連通する桿部成形部とよりなるコ
ンロツド成形用キヤビテイの前記大端部成形部を
湯口に連通させた金型を用い、前記桿部成形部
に、その長手方向に延びるように強化用棒状繊維
成形体を配設した後、前記キヤビテイに溶湯を充
填し、次いでその溶湯を静水的高圧力を以て加圧
することにより該繊維形成体に充填する、高圧凝
固鋳造法を適用した繊維強化コンロツドの製造方
法において、前記小端部成形部に突出するピスト
ンピン孔形成用中子に前記繊維成形体の一端部を
片持ち支持させる工程と；前記キヤビテイ内に充
填した溶湯を、該キヤビテイ外に設けたプランジ
ヤによつて前記湯口内の溶湯を介して全体的に加
圧する工程と；その加圧開始後、所定時間経過す
ると前記小端部成形部の溶湯を第１の局部加圧パ
ンチを用いて直接加圧する工程と；その局部加圧
パンチによる加圧開始後、所定時間経過すると、
前記大端部成形部の溶湯を第２の局部加圧パンチ
を用いて直接加圧する工程と；を有することにあ
る。 The present invention has been proposed in view of the above, and an object of the present invention is to provide the above-mentioned manufacturing method which can eliminate all the above-mentioned inconveniences and inconveniences and significantly improve the filling efficiency of the molten matrix metal into the fiber molded article. The feature is that the large end molding of the connecting rod molding cavity is composed of a large end molding part located at one end, a small end molding part existing at the other end, and a rod molding part communicating both molded parts. Using a mold with a part communicating with a sprue, a reinforcing rod-shaped fiber molded body is arranged in the rod-shaped part so as to extend in the longitudinal direction, and then the cavity is filled with molten metal, and then the molten metal is poured into the cavity. In a method for manufacturing a fiber-reinforced connecting rod using a high-pressure solidification casting method in which the fiber formed body is filled by applying high hydrostatic pressure, the piston pin hole forming core protruding from the small end molded portion is a step of cantilever-supporting one end of the fiber molded body; a step of pressurizing the entire molten metal filled in the cavity via the molten metal in the sprue by a plunger provided outside the cavity; Directly pressurizing the molten metal in the small end forming portion using a first local pressure punch after a predetermined time has elapsed after the start of pressurization; and after a predetermined time has elapsed after the start of pressurization by the local pressure punch;
Directly pressurizing the molten metal in the large end forming portion using a second local pressurizing punch.
以下、図面により本発明の一実施例について説
明すると、第１、第２図において、Ｍは高圧凝固
鋳造用金型を示し、その金型Ｍは固定の下型１と
その下型１に対して昇降可能な上型２とよりな
り、両型１，２の合せ面により第１図左側より大
容積の湯口３およびコンロツド成形用キヤビテイ
４が形成される。キヤビテイ４は、湯口３側の一
端に存し、その湯口３にゲート５を介して連通す
る大容積の大端部成形部４ａと、他端に存する小
容積の小端部成形部４ｂと、両成形部４ａ，４ｂ
を連通する小断面積の桿部成形部４ｃとよりな
る。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, M indicates a mold for high-pressure solidification casting, and the mold M is connected to a fixed lower mold 1 and the lower mold 1. The upper die 2 is movable up and down, and the mating surfaces of the two dies 1 and 2 form a large-volume sprue 3 and a connecting rod molding cavity 4 from the left side in FIG. The cavity 4 has a large-volume large-end molded part 4a that exists at one end on the sprue 3 side and communicates with the sprue 3 via the gate 5, and a small-volume small-end molded part 4b that exists at the other end. Both molded parts 4a, 4b
The rod portion 4c has a small cross-sectional area and communicates with the rod portion 4c.
下型１に、先端を小端部成形部４ｂに突出させ
たピストンピン孔形成用中子６が設けられ、その
中子６の先端に繊維成形体用支持溝７が設けられ
る。強化用棒状繊維成形体Ｆは、桿部成形部４ｃ
にその長手方向に延びるように配設され、その一
端部が支持溝７に圧入固定される。これにより、
繊維成形体Ｆは片持ち支持される。繊維成形体Ｆ
の他端部側の端面は大端部成形部４ａ近傍におい
て開放状態に保たれる。繊維成形体Ｆは、ステン
レス繊維の長繊維を用いて任意かさ密度に成形さ
れたものであるが、その他各種の強化用長繊維を
使用し得る。 The lower mold 1 is provided with a piston pin hole forming core 6 whose tip protrudes into the small end molding portion 4b, and a support groove 7 for the fiber molded body is provided at the tip of the core 6. The reinforcing rod-shaped fiber molded body F has a rod molded part 4c.
The support groove 7 is disposed so as to extend in the longitudinal direction thereof, and one end thereof is press-fitted and fixed into the support groove 7. This results in
The fiber molded body F is supported in a cantilever manner. Fiber molded body F
The end surface on the other end side is kept open near the large end molded portion 4a. The fiber molded body F is formed using long fibers of stainless steel fibers to a desired bulk density, but various other types of long fibers for reinforcement may be used.
湯口３に、溶湯供給管８がその湯口３に向けて
下り勾配に傾斜するように連結される。溶湯供給
管８にホツパ１０が取付けられら、溶湯をホツパ
１０および溶湯供給管８を経て湯口３へ供給し得
るようになつている。溶湯供給管８には、溶湯を
湯口３へ供給した後その管８内をシールするシー
ルプランジヤ１１が摺合される。 A molten metal supply pipe 8 is connected to the sprue 3 so as to be inclined downwardly toward the sprue 3. A hopper 10 is attached to the molten metal supply pipe 8 so that molten metal can be supplied to the sprue 3 via the hopper 10 and the molten metal supply pipe 8. A seal plunger 11 that seals the inside of the pipe 8 after supplying the molten metal to the sprue 3 is slid onto the molten metal supply pipe 8 .
下型１に、先端を湯口３および大端部成形部４
ａにそれぞれ突出させたプランジヤ１２および大
端側局部加圧パンチ１３１が摺動自在に設けら
れ、また上型２に、先端を小端部成形部４ｂに突
出させた小端側局部加圧パンチ１３２が摺動自在
に設けられる。 Place the tip into the lower mold 1, the sprue 3 and the large end molding part 4.
A plunger 12 and a large end local pressure punch 13 1 are slidably protruded from the upper die 2, and a small end local pressure punch 13 1 is provided at the upper mold 2, the tip of which projects into the small end molding part 4b. A punch 132 is slidably provided.
コンロツド鋳造時には、アルミニウム合金より
なる溶湯を湯口３に供給した後、シールプランジ
ヤ１１により溶湯供給管８内をシールする。次い
でプランジヤ１２を上昇させて溶湯をキヤビテイ
４に充填した後、該プランジヤ１２により湯口３
内の溶湯を介してキヤビテイ４内の溶湯全体を圧
力600Kg／cm2程度に１次加圧する。 During conrod casting, after a molten metal made of aluminum alloy is supplied to the sprue 3, the inside of the molten metal supply pipe 8 is sealed by a seal plunger 11. Next, the plunger 12 is raised to fill the cavity 4 with molten metal, and then the plunger 12 opens the sprue 3.
The entire molten metal in the cavity 4 is primarily pressurized to a pressure of about 600 kg/cm 2 via the molten metal inside.
そして前記加圧下に１〜10秒間保持して溶湯が
半凝固状態になつた時点で、両局部加圧パンチ１
３１，１３２等により溶湯を静水的高圧力を以て
加圧するのであるが、大端部成形部４ａの溶湯は
大きな容積を持つ湯口３より保温作用を受けるの
で湯温が降下しにくく、一方小端部成形部４ｂの
溶湯は湯口３による保温作用を受けず、また小断
面積の桿部成形部４ｃを流通する際にその成形部
４ｃおよび繊維成形体Ｆにより熱を奪われるため
湯温が降下し易い。したがつて小端部成形部４ｂ
の溶湯が２次加圧に最適の半凝固状態になつた時
点でも、大端部成形部４ａの溶湯は２次加圧に最
適の半凝固状態には至らないから、その時点でそ
の両溶湯を両局部加圧パンチ１３１，１３２によ
つて同時に２次加圧したのでは、大端部成形部４
ａの溶湯が十分に冷却（凝固収縮）されないうち
に２次加圧が完了してしまい、その後の冷却（凝
固収縮）の際に大端部成形部４ａの溶湯は局部加
圧パンチ１３１による十分な静水的高圧力を受け
ることなく凝固するので、製品大端部のマトリツ
クス部分に収縮に因る引け巣や微細欠陥を生じる
惧れがある。 Then, when the molten metal becomes a semi-solidified state by holding it under the pressure for 1 to 10 seconds, both local pressure punches 1
3 1 , 13 2, etc., the molten metal is pressurized with high hydrostatic pressure, but the molten metal in the large end forming part 4a receives heat retention from the sprue 3 having a large volume, so the temperature of the molten metal is difficult to drop. The molten metal in the end molded part 4b is not subjected to the heat retention effect by the sprue 3, and when flowing through the rod molded part 4c with a small cross-sectional area, heat is taken away by the molded part 4c and the fiber molded body F, so the temperature of the molten metal decreases. Easy to descend. Therefore, the small end molded portion 4b
Even when the molten metal in the large end forming part 4a reaches the semi-solidified state that is optimal for secondary pressing, the molten metal in the large end forming part 4a does not reach the semi-solidified state that is optimal for secondary pressing. If the two local pressure punches 13 1 and 13 2 were used to apply secondary pressure at the same time, the large end molded portion 4
The secondary pressurization is completed before the molten metal a is sufficiently cooled (solidification shrinkage), and during the subsequent cooling (solidification contraction), the molten metal in the large end forming part 4a is compressed by the local pressure punch 131. Since it solidifies without being subjected to sufficient hydrostatic high pressure, there is a risk that shrinkage cavities and micro defects may occur in the matrix portion at the large end of the product due to shrinkage.
そこでキヤビテイ４内溶湯全部をプランジヤ１
２による前記加圧下に前記所定時間保持した後、
まず局部加圧パンチ１３２により圧力1000〜2500
Kg／cm2を以て小端部成形部４ｂの溶湯を加圧し、
その加圧開始から所定時間（例えば２秒）経過後
に大端部成形部４ａの溶湯が２次加圧に最適の半
凝固状態になると、局部加圧パンチ１３１により
同一圧力を以て大端部成形部４ａの溶湯を加圧
し、同時にプランジヤ１２により圧力1000〜1200
Kg／cm2を以て湯口３を加圧する。この２次加圧に
より、溶湯は繊維成形体Ｆの外周面および大端部
成形部４ａ側の端面からその内部に浸入し、繊維
成形体Ｆ全長に亘つて均等に効率良く充填され
る。この加圧状態下で溶湯を完全に凝固させる。 Then, pour all the molten metal in cavity 4 into plunger 1.
After maintaining the predetermined time under the pressure according to 2,
First, apply a pressure of 1000 to 2500 using the local pressure punch 13 2 .
Pressure the molten metal in the small end forming part 4b with Kg/ cm2 ,
After a predetermined period of time (for example, 2 seconds) has elapsed from the start of the pressurization, when the molten metal in the large end forming portion 4a reaches a semi-solid state suitable for secondary pressurization, the large end is formed using the same pressure using the local pressure punch 131. The molten metal in section 4a is pressurized, and at the same time the pressure is increased to 1000 to 1200 by plunger 12.
The sprue 3 is pressurized with Kg/cm 2 . Due to this secondary pressurization, the molten metal infiltrates into the fiber molded body F from the outer circumferential surface and the end face on the large end molded portion 4a side, and is evenly and efficiently filled over the entire length of the fiber molded body F. Under this pressurized state, the molten metal is completely solidified.
その後鋳造体を離型し、それに所定の機械加工
を施すことにより第３、第４図に示すように、大
端部１４ａ、上端部１４ｂおよび両者１４ａ，１
４ｂを連結すると共に長手方向に繊維強化された
桿部１４ｃよりなるコンロツド１４が得られる。 Thereafter, the cast body is released from the mold and subjected to a predetermined machining process, thereby forming a large end 14a, an upper end 14b, and both 14a, 1
A connecting rod 14 is obtained which is made up of a rod portion 14c which connects the rods 4b and is reinforced with fibers in the longitudinal direction.
第５、第６図は桿部１４ｃ横断面におけるステ
ンレス繊維による繊維強化部分およびその外周の
アルミニウム合金単体部分の光学顕微鏡写真
（100倍）をそれぞれ示し、第５図の点状部はステ
ンレス繊維で、それら繊維相互間はアルミニウム
合金により完全に満たされており、これにより繊
維成形体Ｆに対する溶湯の充填性が良好であるこ
とが判る。また第６図からアルミニウム合金単体
部分にも引け巣の発生のないことが判る。 Figures 5 and 6 show optical micrographs (100x) of the fiber-reinforced part made of stainless steel fibers and the aluminum alloy part around its outer periphery in the cross section of the rod part 14c, respectively, and the dotted parts in Figure 5 are made of stainless fibers. The spaces between the fibers are completely filled with aluminum alloy, which indicates that the molten metal can fill the fiber molded body F well. Furthermore, it can be seen from FIG. 6 that no shrinkage cavities occur in the aluminum alloy alone.
以上のように本発明によれば、コンロツド成形
用キヤビテイ４の小端部成形部４ｂに突出するピ
ストンピン孔形成用中子６に強化用棒状繊維成形
体Ｆの一端部を片持ち支持させる工程と；前記キ
ヤビテイ４内に充填した溶湯を、該キヤビテイ４
外に設けたプランジヤ１２によつて、大端部成形
部４ａに連なる湯口３内の溶湯を介して全体的に
加圧する工程と；その加圧開始後、所定時間経過
すると前記小端部成形部４ｂの溶湯を第１の局部
加圧パンチ１３２を用いて直接加圧する工程と；
その局部加圧パンチ１３２による加圧開始後、所
定時間経過すると、前記大端部成形部４ａの溶湯
を第２の局部加圧パンチ１３１を用いて直接加圧
する工程と；を有するので、キヤビテイ４内に充
填されてその外部のプランジヤ１２により全体的
に１次加圧された溶湯のうち、先に温度降下する
小端部成形部４ｂの溶湯を、それが２次加圧に最
適な半凝固状態になるのを待つて第１の局部加圧
パンチ１３２により局部的に加圧し、次いで遅れ
て温度降下する大端部成形部４ａの溶湯を、それ
が２次加圧に最適な半凝固状態になるのを待つて
第２の局部加圧パンチ１３１により局部的に２次
加圧することができ、従つて各局部加圧パンチ１
３１，１３２による大きな２次加圧力を凝固収縮
途中の溶湯にも十分に作用させることができるか
ら、製品のマトリツクス単体部分や繊維強化複合
部のマトリツクス部分に収縮に因る引け巣や微細
欠陥が発生するのを未然に防止し得る。しかも繊
維成形体Ｆはキヤビテイ４内でピストンピン孔形
成用中子６に片持ち支持されることから、繊維成
形体Ｆの大端部成形部４ａ側の端面をその全面に
亘つて開放することができ、それだけ繊維成形体
Ｆの、溶湯浸入を許容する表面積が増加してその
溶湯浸入が容易となり、従つて、前述の如く繊維
強化複合部のマトリツクス部分における微細欠陥
等の発生を未然に防止し得る効果や、繊維成形体
Ｆの両端近傍の溶湯に両局部加圧パンチ１３１，
１３２によつて静水的高圧力を直接且つ強力に作
用させ得る効果と相俟つて、全体として繊維成形
体Ｆへのマトリツクス溶湯の充填効率を著しく高
めることができ、極めて高品質の繊維強化コンロ
ツドが得られる。 As described above, according to the present invention, the step of supporting one end of the reinforcing rod-shaped fiber molded body F in a cantilever manner on the piston pin hole forming core 6 protruding from the small end molded part 4b of the conrod molding cavity 4 and; the molten metal filled in the cavity 4 is
A step of pressurizing the entire molten metal in the sprue 3 connected to the large end forming part 4a by a plunger 12 provided outside; and after a predetermined period of time has elapsed after the start of the pressurization, the small end forming part 4a is pressurized; 4b directly pressurizing the molten metal using the first local pressure punch 132 ;
After a predetermined period of time has passed after the local pressure punch 132 starts applying pressure, the molten metal in the large end forming portion 4a is directly pressurized using the second local pressure punch 131 ; Of the molten metal filled in the cavity 4 and initially pressurized by the plunger 12 outside, the molten metal in the small end forming part 4b whose temperature drops first is selected so that it is optimal for secondary pressurization. Waiting until it becomes semi-solidified, the first local pressure punch 132 locally pressurizes the molten metal in the large end forming part 4a, which is then delayed in temperature to the point where it is optimal for secondary pressurization. After waiting for the state to become semi-solidified, secondary pressure can be applied locally using the second local pressure punch 13 1. Therefore, each local pressure punch 1
Since the large secondary pressure applied by 3 1 and 13 2 can be sufficiently applied to the molten metal in the middle of solidification and contraction, shrinkage cavities and fine particles caused by shrinkage can be prevented in the matrix of the product or the matrix of fiber-reinforced composite parts. Defects can be prevented from occurring. Moreover, since the fiber molded body F is cantilever-supported by the piston pin hole forming core 6 within the cavity 4, the end surface of the fiber molded body F on the large end molded part 4a side can be left open over its entire surface. This increases the surface area of the fiber molded body F that allows the molten metal to infiltrate, making it easier for the molten metal to infiltrate, thereby preventing the occurrence of minute defects in the matrix portion of the fiber-reinforced composite part as described above. Possible effects and local pressure punches 13 1 on the molten metal near both ends of the fiber molded body F,
13 Coupled with the effect of directly and powerfully applying hydrostatic high pressure, the filling efficiency of the molten matrix into the fiber molded body F can be significantly increased as a whole, resulting in an extremely high quality fiber reinforced connecting rod. is obtained.
第１、第２図は本発明に使用される金型を示
し、第１図は縦断正面図、第２図は第１図−
線矢視図、第３図はコンロツドの平面図、第４図
は第３図−線断面図、第５図はコンロツドの
桿部横断面における繊維強化部分の光学顕微鏡写
真図、第６図は桿部横断面における金属単体部分
の光学顕微鏡写真図である。
Ｆ……繊維成形体、Ｍ……金型、３……湯口、
４……キヤビテイ、４ａ……大端部成形部、４ｂ
……小端部成形部、４ｃ……桿部成形部、６……
ピストンピン孔形成用中子、１２……プランジ
ヤ、１３１，１３２……局部加圧パンチ。
1 and 2 show the mold used in the present invention, FIG. 1 is a longitudinal sectional front view, and FIG.
Fig. 3 is a plan view of the conrod, Fig. 4 is a sectional view taken along the line of Fig. 3, Fig. 5 is an optical microscope photograph of the fiber-reinforced portion in the cross section of the rod of the conrod, and Fig. 6 is a plan view of the conrod. FIG. 3 is an optical micrograph of a single metal portion in a cross section of the rod. F...Fiber molded body, M...Mold, 3...Gate,
4...Cavity, 4a...Big end molding part, 4b
...Small end molding part, 4c...Rim part molding part, 6...
Piston pin hole forming core, 12... plunger, 13 1 , 13 2 ... local pressure punch.
Claims (1)
する小端部成形部４ｂと、両成形部４ａ，４ｂを
連通する桿部成形部４ｃとよりなるコンロツド成
形用キヤビテイ４の前記大端部成形部４ａを湯口
３に連通させた金型Ｍを用い、前記桿部成形部４
ｃに、その長手方向に延びるように強化用棒状繊
維成形体Ｆを配設した後、前記キヤビテイ４に溶
湯を充填し、次いでその溶湯を静水的高圧力を以
て加圧することにより該繊維形成体Ｆに充填す
る、高圧凝固鋳造法を適用した繊維強化コンロツ
ドの製造方法において、前記小端部成形部４ｂに
突出するピストンピン孔形成用中子６に前記繊維
成形体Ｆの一端部を片持ち支持させる工程と；前
記キヤビテイ４内に充填した溶湯を、該キヤビテ
イ４外に設けたプランジヤ１２によつて前記湯口
３内の溶湯を介して全体的に加圧する工程と；そ
の加圧開始後、所定時間経過すると前記小端部成
形部４ｂの溶湯を第１の局部加圧パンチ１３２を
用いて直接加圧する工程と；その局部加圧パンチ
１３２による加圧開始後、所定時間経過すると、
前記大端部成形部４ａの溶湯を第２の局部加圧パ
ンチ１３１を用いて直接加圧する工程と；を有す
ることを特徴とする、繊維強化コンロツドの製造
方法。1. The large end of the connecting rod molding cavity 4, which is composed of a large end molding part 4a existing at one end, a small end molding part 4b existing at the other end, and a rod molding part 4c communicating both molding parts 4a and 4b. Using a mold M in which the part forming part 4a is communicated with the sprue 3, the rod part forming part 4 is
After arranging the reinforcing rod-shaped fiber molded body F so as to extend in the longitudinal direction, the cavity 4 is filled with molten metal, and then the molten metal is pressurized with high hydrostatic pressure to form the fiber formed body F. In a method of manufacturing a fiber reinforced connecting rod using a high-pressure solidification casting method, one end of the fiber molded body F is supported in a cantilever manner on a piston pin hole forming core 6 protruding from the small end molded part 4b. a step of pressurizing the molten metal filled in the cavity 4 as a whole through the molten metal in the sprue 3 by a plunger 12 provided outside the cavity 4; after the start of the pressurization, a predetermined a step of directly pressurizing the molten metal in the small end forming portion 4b using a first local pressure punch 132 ; after a predetermined period of time has elapsed after the start of pressure application by the local pressure punch 132 ;
A method for producing a fiber-reinforced connecting rod, comprising the steps of: directly pressurizing the molten metal of the large end forming portion 4a using a second local pressure punch 131 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21067383A JPS60102262A (en) | 1983-11-09 | 1983-11-09 | Production of fiber reinforced composite member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21067383A JPS60102262A (en) | 1983-11-09 | 1983-11-09 | Production of fiber reinforced composite member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60102262A JPS60102262A (en) | 1985-06-06 |
| JPS6246268B2 true JPS6246268B2 (en) | 1987-10-01 |
Family
ID=16593211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21067383A Granted JPS60102262A (en) | 1983-11-09 | 1983-11-09 | Production of fiber reinforced composite member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60102262A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06210426A (en) * | 1992-03-04 | 1994-08-02 | Mitsubishi Electric Corp | Manufacture of casting and its manufacturing equipment |
| JP2780909B2 (en) * | 1993-08-04 | 1998-07-30 | 住友重機械プラスチックマシナリー株式会社 | Local pressurized injection molding machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51104429A (en) * | 1975-03-12 | 1976-09-16 | Sadakichi Sugimura | Daikyasutochuzono ketsukanboshiho |
| JPS51130631A (en) * | 1975-05-08 | 1976-11-13 | Nissan Motor | Metal mould casting method |
| JPS58128264A (en) * | 1982-01-25 | 1983-07-30 | Honda Motor Co Ltd | Production of fiber reinforced composite material |
-
1983
- 1983-11-09 JP JP21067383A patent/JPS60102262A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51104429A (en) * | 1975-03-12 | 1976-09-16 | Sadakichi Sugimura | Daikyasutochuzono ketsukanboshiho |
| JPS51130631A (en) * | 1975-05-08 | 1976-11-13 | Nissan Motor | Metal mould casting method |
| JPS58128264A (en) * | 1982-01-25 | 1983-07-30 | Honda Motor Co Ltd | Production of fiber reinforced composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60102262A (en) | 1985-06-06 |
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