JPS60108152A - Casting mold - Google Patents

Casting mold

Info

Publication number
JPS60108152A
JPS60108152A JP58215356A JP21535683A JPS60108152A JP S60108152 A JPS60108152 A JP S60108152A JP 58215356 A JP58215356 A JP 58215356A JP 21535683 A JP21535683 A JP 21535683A JP S60108152 A JPS60108152 A JP S60108152A
Authority
JP
Japan
Prior art keywords
core
mold
molten metal
hole
vent hole
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.)
Pending
Application number
JP58215356A
Other languages
Japanese (ja)
Inventor
Jun Nakagome
中込 純
Kiyoshi Mori
清 森
Nobuyuki Yamamoto
信幸 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP58215356A priority Critical patent/JPS60108152A/en
Publication of JPS60108152A publication Critical patent/JPS60108152A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/06Permanent moulds for shaped castings
    • B22C9/067Venting means for moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/14Machines with evacuated die cavity
    • B22D17/145Venting means therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

PURPOSE:To discharge gas to the outside of a casting mold without clogging of a vent hole when a molten metal is poured into the mold and to prevent generation of a cavity by interposing an air permeable and heat resistant material for preventing intrusion of the molten metal in the spece between a core supporting part around the vent hole and the core supporting part of the mold. CONSTITUTION:When a core supporting part 1a mounted with a net 8 which is a material for preventing intrusion of a molten metal is fitted into the core supporting hole 2a of a casting mold 2, the net 8 is inserted and packed into the space 5 between the part 1a of the initial size or reduced size and the hole 2a. As a result, the space 5 is narrowed and the molten metal 9 poured into the mold is made hardly intrudable in the space 5. Even if the metal 9 intrudes into the space 5, just the slight amt. of the molten metal can enter the gaps among the entangled strands of the net 8 and the metal 9 is solidified by being deprived of the quantity of heat. The intrusion of the metal 9 to the part of an air vent 4 to clog a vent hole 3 is thus obviated and the gas generated from a core 1 is discharged through the air vent 4 and the vent hole 3 to the outside of the mold.

Description

【発明の詳細な説明】 この発明は、注湯時に中子から発生ずるガスを型外に排
出するだめの孔が溶湯によって閉鎖されるのを防止した
鋳型に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold that prevents holes in a reservoir for discharging gas generated from a core to the outside of the mold during pouring from being blocked by molten metal.

従来、中子を使用する鋳型におい”ζは、例えば第1図
に示すように、中子1の被支持部laを嵌入支持する鋳
型2の中子支持用の穴2aに、これと連続するガス抜き
用の孔3を形成し、この孔3の前記中子支持用の穴2a
に対する開口部にエアベント4を取付けて、注湯時に中
子1から発生ずるガスを型外に排出している。
Conventionally, as shown in FIG. 1, the odor "ζ" of a mold that uses a core is caused by a hole 2a for supporting the core of the mold 2 into which the supported part la of the core 1 is inserted and supported. A gas venting hole 3 is formed, and the core supporting hole 2a of this hole 3 is formed.
An air vent 4 is attached to the opening for discharging gas generated from the core 1 during pouring out of the mold.

しかしながら、一般に鋳型2の中子支持用の穴2aおよ
び中子lの被支持部1aの寸法にはばらつきが生じ易い
ため、中子1の被支持部1aが支持用の穴2aよりも大
きくなって嵌入することができなくなるのを防止するた
めに中子1の被支持部1aを正規の寸法よりも幾分小さ
めに製作している。そのため、中子1を鋳型2に取付け
たとき、鋳型2の中子支持用の穴2aと中子1の被支持
部1aとの間には間隙5が生じ、注湯時にこの間隙5か
ら溶湯がエアベント4の部分まで侵入し−Cガス抜き用
の孔3を閉鎖してしまうことが多く、中子1から発生し
たレジン等の消失等によるガスが型外に排出されないた
め、鋳物に所謂巣が発生する原因の一つになっていた。
However, in general, the dimensions of the core supporting hole 2a of the mold 2 and the supported part 1a of the core l tend to vary, so the supported part 1a of the core 1 is larger than the supporting hole 2a. In order to prevent the core 1 from being unable to be inserted, the supported portion 1a of the core 1 is manufactured to be somewhat smaller than the normal size. Therefore, when the core 1 is attached to the mold 2, a gap 5 is created between the core support hole 2a of the mold 2 and the supported part 1a of the core 1. In many cases, the gas enters the air vent 4 and closes the -C gas vent hole 3, and the gas generated from the core 1 due to disappearance of resin etc. is not discharged outside the mold, resulting in so-called cavities in the casting. was one of the causes of this occurrence.

この発明は、このような従来の問題点に着目してなされ
たもので、中子を支持する部分に中子から発生するガス
を型外に排出するためのガス抜き孔を設けた鋳型の、前
記ガス抜き丁しの周囲の前記中子を支持する部分と中子
の被支持部との間隙に通気性を有する耐熱性の溶6冒U
人防止部材を介装して溶湯が前記ガス抜き孔に侵入する
のを阻止することにより、上記問題点を解決することを
目的としている。
This invention was made by focusing on such conventional problems, and includes a mold that has gas vent holes in the part that supports the core to discharge gas generated from the core to the outside of the mold. A heat-resistant molten resin having air permeability is provided in the gap between the part supporting the core around the gas venting block and the supported part of the core.
It is an object of the present invention to solve the above-mentioned problems by interposing a person-preventing member to prevent molten metal from entering the gas vent hole.

以下、この発明を図面に基づいて説明する。The present invention will be explained below based on the drawings.

第2図は、この発明の一実施例を示す図である。FIG. 2 is a diagram showing an embodiment of the present invention.

従来と同じ部分には同−持回を11シて説明は省111
+iする。図中、))は中子1の被支1.1部1,1.
l:鋳型2の中子支持用の穴2aとの間隙5に挿入充填
された溶湯(ヴ人防止部月としCのI+11である。
For the same parts as before, the same number of times is 11 and the explanation is omitted.
+i. In the figure, )) indicates the supported portion 1.1 of the core 1.
l: Molten metal inserted and filled into the gap 5 between the mold 2 and the hole 2a for supporting the core (I+11 of the mold prevention part 1 and C).

この泪8は溶湯と接触しても焼失しない金属やグラスフ
ァイバー等でできており、中了利の被支1.1部1aに
ムレ若して間j4;i 5に挿入できる。J、・うに被
支持部1aと同様の形状(裁頭円錐形)に形成され弾性
を有している。そして、このtr48は間隙5に挿入さ
れたとき、第3図に示すように、その最大径部である開
口部の直(¥d a 71<鋳型2の穴2aの開口部の
直j4dbより大きくても小さくてもよいが、中子1の
被支持部1aの軸方向同一位置に位置する部位の直径d
cよりも大きくなるよ・)に形成されている。なお、網
8の最大径部の直i¥+J aを鋳型2の穴2aの開口
部の直径dbよりも大きくする場合には、細8を中子1
の被支持部1aに装着し一ζ前記間隙5に挿入する際に
、被支持部1aを壊すことなく同病に鋳型2の穴2aの
中に嵌入することができるような形4J: AEよび寸
法にする。
This lever 8 is made of metal or glass fiber, etc., which will not burn out even if it comes into contact with molten metal, and can be inserted into the support part 1.1 of the middle plate 1.1a and between j4 and i5. J. - The sea urchin is formed in the same shape (truncated conical shape) as the supported portion 1a and has elasticity. When this tr48 is inserted into the gap 5, as shown in FIG. The diameter d of the portion of the supported portion 1a of the core 1 located at the same position in the axial direction may be small.
It will be larger than c). In addition, when making the diameter i + J a of the maximum diameter part of the net 8 larger than the diameter db of the opening of the hole 2a of the mold 2, the thin 8 is inserted into the core 1.
Shape 4J that can be fitted into the hole 2a of the mold 2 without breaking the supported part 1a when it is attached to the supported part 1a of 1ζ and inserted into the gap 5: AE and Dimension.

次に作用をjBa明する。Next, the action will be explained.

11i118を装7?Tシた中子1の被支持部1aを鋳
型2の中子支1,1用の穴2aに嵌入すると、網8は被
支持部1;1あるいは穴2aの寸法のばらつきの程度に
応してそのままの寸法で、あるいは圧縮されて第4図に
示すように被支持部1aと穴2aとの間隙5内に挿入充
盾される。この結果、間隙5が狭められるため注入され
た溶湯9【J間隙5に侵入しlitくなる。また、溶@
9が仮に間隙5に侵入したとしても、網8を構成する入
り組んだ素線8aの間には僅かな量しか入り込めず、そ
のような僅かな量の溶汎は短時間O)うちに素線8aに
熱量を奪われて凝固してしJ:う。したがって、溶湯9
がエアヘント4の部う〕まで侵入してガス抜き用の孔3
を閉鎖するようなことは起り得す、中子1から発生した
ガスはエアヘント4からガス抜き用の孔3を通じ°ζ容
易に型外へ排出される。
11i118 is equipped with 7? When the supported part 1a of the T-shaped core 1 is inserted into the hole 2a for the core supports 1 and 1 of the mold 2, the mesh 8 will be adjusted according to the degree of variation in the dimensions of the supported part 1;1 or the hole 2a. It is inserted and filled in the gap 5 between the supported part 1a and the hole 2a as shown in FIG. As a result, since the gap 5 is narrowed, the injected molten metal 9 [J] enters the gap 5 and becomes lit. Also, melt @
Even if the wire 9 were to enter the gap 5, only a small amount would be able to enter between the intricate strands 8a that make up the net 8, and such a small amount of welding would cause the strands to melt for a short period of time. The heat is taken away by the wire 8a and it solidifies. Therefore, molten metal 9
enters the air vent 4 and opens the gas vent hole 3.
Gas generated from the core 1 is easily discharged from the air vent 4 through the gas vent hole 3 to the outside of the mold.

第5図a、bには前記([48の他の実施例か示しであ
る。aの実施例は、ell 8の開[1部を圧縮して素
線の密度を濃くすることができる。1、うに、開口部に
放射方向に膨らんだ環状膨出部う310を形成したもの
である。またbの実施例は、開口部の素綿密度をより濃
くする)こめにIIM+ 8の開D 1Jiiiを渦巻
状に形成したものである。
FIGS. 5a and 5b show another embodiment of the above-mentioned ([48]. In the embodiment of a, one part of the cell 8 can be compressed to increase the density of the strands. 1, an annular bulge 310 is formed in the opening that bulges in the radial direction.In addition, in the embodiment b, the cotton density of the opening is made denser). 1Jiii is formed into a spiral shape.

第6図に示す実施例は、/8湯侵入防止部4,112を
前記実施例のような網ではなく、グラスウールや難燃加
工を施した紙等によりリング状に形成したものであり、
この/8場侵入防止部月12は鋳型2の中子支持用の穴
2aと中子1の被支持部1aとの間隙5に装着する前の
厚さが間隙5の寸法Sよりも大きくなっている。そして
、装着時には間隙5の寸法Sと等しい厚さまで圧潰され
て間隙5内への/8湯9の侵入を防止する。
In the embodiment shown in FIG. 6, the /8 hot water intrusion prevention part 4, 112 is formed in a ring shape from glass wool, flame-retardant paper, etc., instead of a net as in the previous embodiment.
The thickness of this/8 field intrusion prevention part 12 before it is installed in the gap 5 between the core support hole 2a of the mold 2 and the supported part 1a of the core 1 is larger than the dimension S of the gap 5. ing. When installed, it is crushed to a thickness equal to the dimension S of the gap 5 to prevent the /8 hot water 9 from entering into the gap 5.

第7図aの実施例は、鋳型2の中子支持部’2bが突出
し、中子1の被支持部1bが平坦な場合を示しCおり、
第6図の実施例と同じ材質からなるリング状の介在物1
3でガス抜き孔3の周囲を取り囲んだものである。この
介在物13は、第6図の実施例の場合と同様に装着前の
第6図の実施例の場合と同様に装着前の厚さが間隙5の
寸法Pよりも大きくなっており、装着時に圧潰されてガ
ス抜き孔3への溶湯9の侵入を防止する。なお、この介
在物13が充分な通気性を有する場合には、リング状で
はなく第7図すに示すように円盤状に形成してもよい。
The embodiment shown in FIG. 7a shows a case where the core support part 2b of the mold 2 protrudes and the supported part 1b of the core 1 is flat.
Ring-shaped inclusion 1 made of the same material as the embodiment shown in FIG.
3 surrounds the gas vent hole 3. The thickness of this inclusion 13 before installation is larger than the dimension P of the gap 5, as in the case of the embodiment shown in FIG. When crushed, the molten metal 9 is prevented from entering the gas vent hole 3. In addition, if this inclusion 13 has sufficient air permeability, it may be formed not in a ring shape but in a disk shape as shown in FIG. 7.

なお、図示は省略するが、第7図の例にあっては、中子
1は鋳型2に両方向から挟圧されて支持されている。
Although not shown, in the example shown in FIG. 7, the core 1 is supported by the mold 2 while being pressed from both directions.

以上説明してきたようにこの発明によれば、中子を支持
する部分に中子から発生ずるガスを型外に排出するため
のガス抜き孔を設けた鋳型において、前記ガス抜き孔の
周囲の前記中子を支持する部り)と中子の被支持部との
間隙に、通気性を有する耐熱性の溶湯侵入防止部44を
介装して/8湯がガス抜き孔に侵入するのを阻止するよ
うにしたため、注湯時に前記間隙から1促大した溶湯に
よってガス抜き孔が閉鎖されることはなく、中子から発
生したガスを型外に排出することができ、鋳物の巣の大
きな発生原因の−っを解消することができる。
As described above, according to the present invention, in a mold in which a gas vent hole is provided in a portion supporting the core for discharging gas generated from the core to the outside of the mold, the gas vent hole surrounding the gas vent hole is A breathable, heat-resistant molten metal intrusion prevention part 44 is interposed in the gap between the part that supports the core) and the supported part of the core to prevent /8 molten metal from entering the gas vent hole. As a result, the gas vent hole will not be closed by the molten metal that has increased in size from the gap during pouring, and the gas generated from the core can be discharged outside the mold, preventing the formation of large cavities in the casting. It is possible to eliminate the cause.

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

第り図は従来の鋳型の中子用ガス抜き孔の部分の正面断
面図、第2図はこの発明に係るiカ′型の一実施例にお
りる中子用ガス抜き几の部分および溶湯侵入防止部材の
正面IJJi面図、第3図は第2図の鉛′型におりる中
子支持部分および中子の被支持部分とl容7A侵入防止
部(」との寸法IWI係を示す説明図、第4図は第2図
のIV−IV矢祝1vi面図、第5図a、b、第6図、
第7図a、bはそれぞれこの発明に係る/8湯侵入防止
部材の別実施例の正面1IJi面図である。 1−−−一中子、 1a、1b−−−一中子の被支持部分、2−−−−一鋳
型、 2a、2b−一−−鋳型の中子支持部分、3−・−ガス
抜き孔、 5−−−−−一間隙、 8.12.13−”−溶湯侵入防止部材。 特許出願人 日産自動車株式会社 代理人弁理士 有我軍一部 第1図 第2図 第3図 第4図 第5図 第6図 第7図 (a) (b)
Figure 1 is a front sectional view of the core gas vent hole of a conventional mold, and Figure 2 is a core gas vent part and molten metal in an embodiment of the i-shaped mold according to the present invention. A front view of the intrusion prevention member, Figure 3 shows the dimensions IWI between the core supporting part and the supported part of the core that fall into the lead shape of Figure 2 and the 7A intrusion prevention part (''). Explanatory drawing, Fig. 4 is a view of IV-IV arrow 1vi of Fig. 2, Fig. 5 a, b, Fig. 6,
FIGS. 7a and 7b are front views of another embodiment of the /8 hot water intrusion prevention member according to the present invention. 1--One core, 1a, 1b--Supported part of one core, 2---One mold, 2a, 2b--One core supporting part of mold, 3-- Gas venting Hole, 5-------Gap, 8.12.13-'' Molten metal intrusion prevention member. Patent applicant: Nissan Motor Co., Ltd. Attorney, Ugagun Department Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 (a) (b)

Claims (1)

【特許請求の範囲】[Claims] 中子を支持する部分に中子から発生するガスを型外に排
出するだめのガス抜き孔を設けた鋳型において、前記ガ
ス抜き孔の周囲の前記中子を支持する部分と前記中子の
被支持部との間隙に通気性をaする耐熱性の溶湯侵入防
止部祠を介装したことを特徴とする鋳型。
In a mold having a gas vent hole for discharging gas generated from the core to the outside of the mold in a portion supporting the core, the portion supporting the core around the gas vent hole and the covering of the core are provided. A mold characterized in that a heat-resistant molten metal intrusion prevention part hole that provides air permeability is interposed in the gap between the support part and the support part.
JP58215356A 1983-11-16 1983-11-16 Casting mold Pending JPS60108152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58215356A JPS60108152A (en) 1983-11-16 1983-11-16 Casting mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58215356A JPS60108152A (en) 1983-11-16 1983-11-16 Casting mold

Publications (1)

Publication Number Publication Date
JPS60108152A true JPS60108152A (en) 1985-06-13

Family

ID=16670934

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58215356A Pending JPS60108152A (en) 1983-11-16 1983-11-16 Casting mold

Country Status (1)

Country Link
JP (1) JPS60108152A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01150429A (en) * 1987-12-09 1989-06-13 Nissan Motor Co Ltd Method for holding collapsible staying core

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01150429A (en) * 1987-12-09 1989-06-13 Nissan Motor Co Ltd Method for holding collapsible staying core

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