JPS5844903Y2 - Mold for upper expanded steel ingot - Google Patents

Description

【考案の詳細な説明】 本考案は１拡鋼塊用鋳型、更に詳しくは上拡鋼塊を鋳造
するのに用いられる内径が下方に行く程縮径し外径が下
方に行く程拡径した筒形の鋳型に関するものである。[Detailed description of the invention] This invention is a mold for 1 steel expansion ingot, more specifically, the inner diameter used to cast the upper expansion ingot decreases as it goes downwards, and the outside diameter increases as it goes downwards. This relates to a cylindrical mold.

一般にこの種の内径が上拡がりで外径が下拡がりとなっ
た１拡鋼塊用鋳型は、第１図に示すように、上端部外周
に肉厚を増大させる袴部４を設けてこの部分を補強して
いるが一従来の袴部４の上下長りの鋳型Ａ全長Ｈに対す
る割合（ｈ／Ｈ）は通常０．３４〜０．３２となってい
て、熱負荷の大きな箇所に肉厚変動部が位置することと
なり、この部位の外面温度が６００℃前後迄上昇するこ
とにより、この部位に生じる熱応力によって同図で示す
ような横割れＣが発生する場合が多いという問題があっ
た。Generally, this type of mold for expanded steel ingots, in which the inner diameter expands upward and the outer diameter expands downward, is provided with a hakama part 4 on the outer periphery of the upper end to increase the wall thickness, as shown in Fig. 1. However, the ratio (h/H) of the vertical length of the conventional hakama part 4 to the total length H of the mold A is usually 0.34 to 0.32, and thick walls are used in areas where the heat load is large. As the fluctuating part is located and the external temperature of this part rises to around 600℃, there is a problem that the thermal stress generated in this part often causes transverse cracks C as shown in the same figure. .

本考案は上記の点に鑑みて為されたものであって、主な
目的とするところは鋳型の上端部における横割れを防止
すると共に鋳型の上端部を補強する袴部が短く憤斉む１
拡鋼塊用鋳型を提供することである。The present invention has been developed in view of the above points, and its main purpose is to prevent horizontal cracking at the upper end of the mold, and to prevent the hakama part that reinforces the upper end of the mold from being short.
An object of the present invention is to provide a mold for expanding steel ingots.

本考案を以下図に示す実施例に基いて詳述する。The present invention will be explained in detail below based on embodiments shown in the figures.

本考案に係る１拡鋼塊用鋳型ば、第２図以下に示すよう
に一内径が下方に行く程縮径し外径が下方に行く程拡径
した筒形の鋳型Ａ上端部の内壁に上端より一定の長さ範
囲で内径が略一定となる略垂直面１が形成されると共に
、略垂直面１の下方の内径が下方に行う程順次内径を小
さくするテーパ内面２となり、略垂直面１の全長に亘っ
てスリーブレンガ３が取着されると共に、鋳型Ａ上端部
の外壁に鋳型への上端より上記略垂直面１の長さ以下の
範囲内に亘る部分にこの部分の肉厚を増大させる袴部４
が鋳型Ａの全周に亘って形成され、袴部４より下方の鋳
型Ａの外壁が下方に行く程その外径を大きくするテーパ
外面５となったことを特徴とするものである。A mold for an expanded steel ingot according to the present invention is a cylindrical mold A with an inner diameter that decreases as it goes downward and an outer diameter that increases as it goes downward, as shown in Figure 2 and below. A substantially vertical surface 1 whose inner diameter is substantially constant within a certain length range from the upper end is formed, and the inner diameter below the substantially vertical surface 1 becomes a tapered inner surface 2 whose inner diameter is gradually smaller as it goes downward. A sleeve brick 3 is attached over the entire length of the mold A, and a wall thickness of this part is set on the outer wall of the upper end of the mold A in a range extending from the upper end of the mold to the length of the substantially vertical surface 1 or less. Hakama part 4 to increase
is formed over the entire circumference of the mold A, and the outer wall of the mold A below the hakama part 4 has a tapered outer surface 5 whose outer diameter increases as it goes downward.

袴部４ば、第２図に示すように鋳型Ａ上端部外周能、平
端部外周に形成されていて、鋳型Ａ上下両端部における
長辺がわの略中央に夫々一対の把手６が突出し、この把
手６を利用して鋳造後に鋳型Ａを鋼塊より離すために鋳
型Ａが移動される。As shown in FIG. 2, the hakama part 4 is formed on the outer periphery of the upper end of the mold A and the outer periphery of the flat end thereof, and a pair of handles 6 protrude from approximately the center of the long sides at both the upper and lower ends of the mold A, respectively. Using this handle 6, the mold A is moved to separate it from the steel ingot after casting.

スリーブレンガ３は同図に示す上うに、その上端を鋳型
Ａ上端に合致させて略垂直面１の全面に亘って取着され
、鋳造毎に取り替える。As shown in the figure, the sleeve brick 3 is attached over the entire substantially vertical surface 1 with its upper end matching the upper end of the mold A, and is replaced every time casting is performed.

鋳型Ａ上端部の袴部４ば上記スリーブレンガ３の鋳型Ａ
上端からの長さよりも短い長さで鋳型Ａ上端から下方に
向う部分の外周へ全周に亘って形成されている。Hakama part 4 at the upper end of mold A is mold A for the sleeve brick 3.
The length is shorter than the length from the upper end and is formed all around the outer periphery of the part facing downward from the upper end of the mold A.

本考案は以上のように、内径が下方に行く程縮径し外径
が下方に行く程拡径した筒形の鋳型上端部の内壁に上端
より一定の長さ範囲で内径が略一定となる略垂直面が形
成され、略垂直面の全長に亘ってスリーブレンガが取着
されると共に鋳型上端部の外壁に鋳型の上端より上記略
垂直面の長さ以下の範囲内に亘る部分に袴部が全周に亘
って形成されているため、スリーブレンガによる断熱幼
果と袴部による補強効果とで、鋳型上端部の欠損が防止
できるものであり、特にスリーブレンガによって鋳型上
端部の表面温度上昇を抑えることにより、この部分の材
質劣化が殆んどなく、補強部である袴部を小さくするこ
とができるものである。As described above, the present invention has an inner wall of the upper end of a cylindrical mold in which the inner diameter decreases as it goes downward and the outer diameter increases as it goes downward, and the inner diameter is approximately constant within a certain length range from the upper end. A substantially vertical surface is formed, and a sleeve brick is attached over the entire length of the substantially vertical surface, and a hakama portion is provided on the outer wall of the upper end of the mold in a range extending from the upper end of the mold to a length of the approximately vertical surface or less. is formed around the entire circumference, the sleeve bricks provide insulation and the reinforcing effect of the hakama part prevents chipping of the upper end of the mold.In particular, the sleeve brick prevents the surface temperature from increasing at the upper end of the mold. By suppressing this, there is almost no material deterioration in this part, and the hakama part, which is a reinforcing part, can be made smaller.

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

第１図は従来例を示す正面図、第２図ａ、ｔ）は夫々本
考案の一実施例を示す一部切欠正面図及び一部切欠側面
図であり、Ａは鋳型、１は略垂直面、２はテーパ内面、
３はスリーブレンガ、４は袴部、５はテーパ外面である
。Fig. 1 is a front view showing a conventional example, Fig. 2 a and t) are a partially cutaway front view and a partially cutaway side view respectively showing an embodiment of the present invention, where A is a mold and 1 is a substantially vertical surface, 2 is the tapered inner surface,
3 is a sleeve brick, 4 is a skirt portion, and 5 is a tapered outer surface.

Claims (1)

【実用新案登録請求の範囲】 上拡鋼塊を鋳造するために用いられる内径が下方に行く
程縮径し外径が下方に行ぐ程拡径した筒形の鋳型であっ
て、鋳型上端部の内壁に上端より一定の長さ範囲で内径
が略一定となる略垂直面が形成されると共に、略垂直面
の下方の内壁が下方に行く程順次内径を小さくするテー
パ内面となり。 略垂直面の全長に亘ってスリーブレンガが取着されると
共に、鋳型上端部の外壁に鋳型の上端より上記略垂直面
の長さ以下の範囲内に亘る部分にこの部分の肉厚を増大
させる袴部が鋳型の全周に亘って形成され、袴部より下
方の鋳型の外壁が下方に行く程その外径を大きくするテ
ーパ外面となったことを特徴とする１拡鋼塊用鋳型。[Scope of Claim for Utility Model Registration] A cylindrical mold in which the inner diameter decreases downwardly and the outer diameter increases downwardly, which is used to cast the upper expanded steel ingot, and the upper end of the mold A substantially vertical surface having a substantially constant inner diameter within a certain length range from the upper end is formed on the inner wall of the inner wall, and the inner wall below the substantially vertical surface has a tapered inner surface whose inner diameter gradually decreases as it goes downward. A sleeve brick is attached over the entire length of the substantially vertical surface, and the wall thickness of this portion is increased in a portion of the outer wall of the upper end of the mold that extends from the upper end of the mold to a length below the length of the approximately vertical surface. 1. A mold for an expanded steel ingot, characterized in that a hakama part is formed over the entire circumference of the mold, and the outer wall of the mold below the hakama part has a tapered outer surface whose outer diameter increases as it goes downward.