JPH043705Y2 - - Google Patents
Info
- Publication number
- JPH043705Y2 JPH043705Y2 JP15396286U JP15396286U JPH043705Y2 JP H043705 Y2 JPH043705 Y2 JP H043705Y2 JP 15396286 U JP15396286 U JP 15396286U JP 15396286 U JP15396286 U JP 15396286U JP H043705 Y2 JPH043705 Y2 JP H043705Y2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- sand
- molten metal
- mesh filter
- casting
- 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 17
- 239000002184 metal Substances 0.000 claims description 17
- 239000004576 sand Substances 0.000 claims description 14
- 238000005266 casting Methods 0.000 description 13
- 238000000465 moulding Methods 0.000 description 4
- 238000007528 sand casting Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000009970 fire resistant effect Effects 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
（産業上の利用分野）
本考案は、溶湯濾過用網状フイルターが見切り
面に備えられた砂型造型鋳型に関する。
（従来の技術）
ガラス繊維や炭素繊維等の耐火繊維で織製され
て保形性が与えられた網状フイルターは、アルミ
ニウム等の非鉄金属や鋳鋼、鋳鋼等の溶湯中に混
在したノロ、スラグ等の異物の分離効果に優れて
いるため、近年鋳造工業の分野で注目を集めてい
る。
この種の網状フイルターは、耐火繊維で織製さ
れた網状織布にフエノールレジンなどで硬化処理
がなされ、保形性が与えられてフイルターとされ
た後、生型造型鋳型ん湯口や湯道等の溶湯流路の
途中に配設して使用される。
例えば、第３図は、網状フイルター２１を湯口
２２の中途で湯口底２３の上部近傍の見切り面２
６上に配設した状態を示しており、図において、
２４は上型、２５は下型、２７は湯道、２８は製
品鋳造空間、２９は押湯部鋳造空間である。
（考案が解決しょうとする問題点）
網状フイルター２１は、通常、上型２４と下型
２５とによつて見切り面２６上に挟持されるが、
上型２４および下型２５の砂型硬度が低い場合、
上型２４に開設された湯口２２の見切り面２６上
の開口周縁３０並びに下型２５の開口周縁３１に
型くずれが生じ、鋳砂が注湯された溶湯に混入
し、砂かみや砂の巻き込みが生じ、鋳造製品の品
質低下を招来している。
本考案はかかる問題点に鑑みなされたもので、
生型造型鋳型の硬度に拘らず、網状フイルターを
上型と下型とによつて挟持する際、型くずれが生
じず、従つて溶湯への鋳砂の混入を確実に防止す
ることができる砂型造型鋳型を提供することを目
的とする。
（問題点を解決するための手段）
叙上の目的を達成するために講じた手段は、上
型３又は下型４の溶湯流路１の見切り面５の開口
周縁７に型くずれ防止用凹部８を形成した点にあ
る。
（作用および実施例）
次に図面を参照して本考案の実施例について説
明する。
第１図は、実施例に係る砂型造型鋳型の要部断
面図であり、溶湯流路の一部を構成する湯口１に
網状フイルター２が配設されている。前記網状フ
イルター２は、上型３と下型４とによつて見切り
面５上に挟持されている。尚、１０は湯道であ
り、製造鋳造空間、押湯部鋳造空間等は、図示省
略しているが適宜造形される。
下型４には湯口下部１ａおよび湯口底６が形成
され、見切り面５に開設された開口周縁７にフラ
ンジ状の型くずれ防止用凹部８が設けられてい
る。網状フイルター２が上型３と下型４とによつ
て挟持されたとき前記凹部８の肩部９で型くずれ
が生じても、該凹部８では、網状フイルター２が
砂型内に押し込まれず、その全域に亘つて型くず
れが生じず、鋳砂が溶湯流路内に落下することが
ない。
本考案者の研究によると、型硬度が90を越える
と、強度は充分であり、型くずれは生じ難く、前
記凹部８は必ずしも必要とされない。一方、鋳砂
充填圧が低く、型硬度が60〜90しか得られないと
きは、前記凹部８が必要となる。その好適な寸法
は、第２図に示すように、網状フイルター２の挟
持前の状態において、第１表の通りである。
尚、第１表は、湯口径φ45mm、網状フイルター
のフイルター厚さ1.1mmのものを使用した場合で
あるが、通常、湯口径φ50mm、フイルター厚さ1.3
mm程度までは、本表を目安として使用することが
できる。同表には、参考までに網状フイルターの
押し代えｃの併せて記載した。
(Industrial Field of Application) The present invention relates to a sand molding mold provided with a mesh filter for filtrating molten metal on its parting surface. (Prior art) Reticulated filters woven from fire-resistant fibers such as glass fibers and carbon fibers to provide shape retention are capable of removing slag, slag, etc. mixed in non-ferrous metals such as aluminum and molten metals such as cast steel and cast steel. In recent years, it has attracted attention in the casting industry due to its excellent ability to separate foreign substances. This type of reticular filter is made by hardening a reticular fabric woven from fire-resistant fibers with phenol resin etc. to give it shape retention properties and then making it into a filter. It is used by placing it in the middle of the molten metal flow path. For example, in FIG.
6 is shown, and in the figure,
24 is an upper mold, 25 is a lower mold, 27 is a runner, 28 is a product casting space, and 29 is a feeder casting space. (Problems to be solved by the invention) The mesh filter 21 is normally held between the upper mold 24 and the lower mold 25 on the parting surface 26, but
When the sand mold hardness of the upper mold 24 and the lower mold 25 is low,
Deformation occurs at the opening periphery 30 on the parting surface 26 of the sprue 22 opened in the upper mold 24 and the opening periphery 31 of the lower mold 25, and casting sand mixes into the poured molten metal, causing sand traps and sand entrainment. , resulting in a decline in the quality of cast products. This invention was created in view of these problems.
Green molding A sand molding method that does not cause mold deformation when sandwiching a mesh filter between an upper mold and a lower mold, regardless of the hardness of the mold, and that can reliably prevent casting sand from entering the molten metal. The purpose is to provide molds. (Means for solving the problem) The means taken to achieve the above-mentioned purpose is to provide a recess 8 for preventing mold deformation in the opening periphery 7 of the parting surface 5 of the molten metal channel 1 of the upper mold 3 or lower mold 4. It is at the point where it was formed. (Operations and Examples) Next, examples of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a sand casting mold according to an embodiment, in which a mesh filter 2 is disposed in a sprue 1 forming a part of a molten metal flow path. The mesh filter 2 is held between an upper mold 3 and a lower mold 4 on a parting surface 5. The runner 10 is a runner, and the manufacturing casting space, the feeder casting space, etc. are not shown but are appropriately shaped. The lower mold 4 is formed with a sprue lower part 1a and a sprue bottom 6, and a flange-shaped recess 8 for preventing deformation is provided at the opening periphery 7 formed in the parting surface 5. Even if deformation occurs at the shoulder 9 of the recess 8 when the mesh filter 2 is held between the upper mold 3 and the lower mold 4, the mesh filter 2 is not pushed into the sand mold in the recess 8 and the entire area is No deformation occurs during the process, and no casting sand falls into the molten metal flow path. According to the inventor's research, when the mold hardness exceeds 90, the strength is sufficient and deformation hardly occurs, and the recess 8 is not necessarily required. On the other hand, when the casting sand filling pressure is low and the mold hardness is only 60 to 90, the recess 8 is necessary. Its suitable dimensions are as shown in Table 1 in the state before the mesh filter 2 is clamped, as shown in FIG. Table 1 shows the case where a sprue diameter of φ45 mm and a mesh filter with a filter thickness of 1.1 mm are used, but normally, a sprue diameter of φ50 mm and a filter thickness of 1.3 mm are used.
This table can be used as a guideline up to about mm. For reference, the displacement of the mesh filter c is also listed in the same table.
【表】
前記網状フイルター２は、ガラス繊維や炭素繊
維等の耐火繊維で形成され、通常フエノールレジ
ン等で保形されている。鋳造用金属として鋳鉄や
鋳鋼等の高融点金属溶湯を用いる場合、ガラス繊
維としてはSiO2含有量を75重量％以上とし、か
つ予め焼成して収縮させたものがよい。この条件
は、本考案者が特願昭60−235032号において明ら
かにしたもので、SiO2含有量が75％以上であら
ゆる種類の鋳鉄溶湯（鋳込温度1200〜1450℃）に
適用できるからであり、また予め焼成して収縮さ
せたものを用いるのは、溶湯通過時のフイルター
の収縮によるフイルターの破損を防止できるから
である。
網状フイルター２の目開きサイズは、除去する
ノロ、スラグ等の非金属介在物の大きさにもよる
が、通常0.4〜４mm2で充分である。
（考案の効果）
以上説明した通り、本考案の砂型造型鋳型は、
下型の溶湯流路の見切り面上の開口周縁に型くず
れ防止用凹部が形成されているので、網状フイル
ターを上型と下型とによつて見切り面上で挟持し
ても、開口周縁に網状フイルターが押し込まれ
ず、型くずれが生じない。従つて、溶湯流路中に
鋳砂が落とし込まれることがなく、砂かみ等の鋳
造欠陥を有効に防止することができる。[Table] The mesh filter 2 is made of fire-resistant fibers such as glass fibers and carbon fibers, and is usually kept in shape with phenol resin or the like. When using a high melting point metal molten metal such as cast iron or cast steel as the casting metal, it is preferable that the glass fiber has an SiO 2 content of 75% by weight or more and has been previously fired to shrink. This condition was clarified by the present inventor in Japanese Patent Application No. 60-235032, and is applicable to all types of molten cast iron (casting temperature 1200 to 1450℃) with a SiO 2 content of 75% or more. The reason for using a filter that has been pre-fired and shrunk is that it can prevent damage to the filter due to shrinkage when the filter passes through the molten metal. The opening size of the mesh filter 2 depends on the size of nonmetallic inclusions such as slag and slag to be removed, but 0.4 to 4 mm 2 is usually sufficient. (Effects of the invention) As explained above, the sand molding mold of the invention has
A recess for preventing mold deformation is formed on the opening periphery of the molten metal flow path of the lower mold, so even if the mesh filter is held between the upper mold and the lower mold on the opening The filter will not be pushed in and will not lose its shape. Therefore, casting sand is not dropped into the molten metal flow path, and casting defects such as sand traps can be effectively prevented.
第１図は本考案に係る砂型造型鋳型の要部断面
説明図、第２図は型締め前の砂型造型鋳型の要部
断面説明図、第３図は従来の砂型造型鋳型の断面
図である。
１……湯口、３……上型、４……下型、５……
見切り面、７……開口周縁、８……型くずれ防止
凹部。
Fig. 1 is an explanatory cross-sectional view of the main parts of the sand casting mold according to the present invention, Fig. 2 is an explanatory cross-sectional view of the main parts of the sand casting mold before clamping, and Fig. 3 is a cross-sectional view of the conventional sand casting mold. . 1... sprue, 3... upper mold, 4... lower mold, 5...
Parting surface, 7... Opening periphery, 8... Deformation prevention recess.
Claims (1)
路１に網状フイルター２が配設され、該網状フイ
ルター２は上型３と下型４との見切り面５に挟持
されている砂型造型鋳型において、 下型４の溶湯流路１の見切り面５上の開口周縁
７に型くずれ防止用凹部８が形成されていること
を特徴とする砂型造型鋳型。[Claims for Utility Model Registration] A mesh filter 2 is disposed in the molten metal flow path 1 formed between the upper mold 3 and the lower mold 4, and the mesh filter 2 is a parting point between the upper mold 3 and the lower mold 4. A sand mold making mold which is sandwiched between surfaces 5, characterized in that a recess 8 for preventing deformation is formed in the opening periphery 7 on the parting surface 5 of the molten metal channel 1 of the lower mold 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15396286U JPH043705Y2 (en) | 1986-10-06 | 1986-10-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15396286U JPH043705Y2 (en) | 1986-10-06 | 1986-10-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6362243U JPS6362243U (en) | 1988-04-25 |
| JPH043705Y2 true JPH043705Y2 (en) | 1992-02-05 |
Family
ID=31073327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15396286U Expired JPH043705Y2 (en) | 1986-10-06 | 1986-10-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH043705Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5162627B2 (en) * | 2009-07-29 | 2013-03-13 | 株式会社東京興業貿易商会 | Method for producing filter for molten metal and filter for molten metal |
-
1986
- 1986-10-06 JP JP15396286U patent/JPH043705Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6362243U (en) | 1988-04-25 |
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