JPS6146354A - Water-cooled casting mold for melting and refining metal - Google Patents

Abstract

PURPOSE:To obtain a water-cooled casting mold for melting and refining metal adequate for production of a large-sized ingot by stacking axially plural pieces of units each constituted by mounting a water cooling jacket on the outside circumference of a cylindrical casting mold having a substantial size to increase the capacity. CONSTITUTION:The cylindrical casting molds 10a, 10b made of copper or copper alloy mounted with the water cooling jackets 20a, 20b on the outside circumferential wall are made a unit and plural pieces of such units are axially superposed and connected to form the casting mold having the required large capacity. A watertight universal joint 43 is provided to penetrate the sealing ring 11b and flange 12a provided to the juncture of the casting mold and a cooling water flow passage 42 for communicating the jackets 20a, 20b via the notches 26b, 26a of the flanges 24b, 25a is formed. The water cooling casting mold for melting and refining metal which has the simple wate cooling piping system and is suitable for production of the large-sized ingot for producing a long shaft product is thus provided.

Description

[Detailed Description of the Invention] Field of Application The present invention relates to a water-cooled cylindrical mold for metal melting and refining. Regarding the multi-tiered water cooling type.

Conventional technology To melt special alloy 6111, IT hot steel, titanium, etc., various methods such as vacuum arc remelting method, electroslag remelting method, and electron beam remelting method are applied. By melting the material with heat from heat sources such as gel heat and electron beam, and rapidly cooling it by dropping it into a water-cooled mold, we aim to obtain a cast iron with fewer molding defects such as segregation and inclusion. It is something to do.

However, in recent years, as the various mechanical structures for which these special steels are mainly used have become larger, the size of the scepter ingots has been increasing (
In order to meet this demand, the water-cooled mold is also
A large-capacity device with a melting capacity of more than 50 tons per batch has come to be required.

On the other hand, water-cooled molds are made of copper or copper alloy, which is a material with high thermal conductivity, so there is a limit to the size of the material that can be obtained, and the welded structure has a large capacity that is reliable enough to be used as a mold. It is extremely difficult to achieve this goal. Therefore, we made the peripheral wall of the mold an aggregate of multiple narrow pieces parallel to the axis.
Tighten with a tightening ring from the outside in a barrel or loop shape.
A model has been proposed in which the diameter is increased by increasing the diameter, thereby increasing the capacity, but this requires a water-cooled glossy duct attached to each small piece that makes up the peripheral wall. However, the joint line of the water cooling jacket is long and the water cooling piping system is complicated, which are disadvantageous.

Purpose of the Invention In view of the shortcomings of the prior art, the purpose of the present invention is to increase the capacity by stacking a plurality of water-cooled Tsuya Care F units in the axial direction on the outer periphery of a cylindrical mold having sufficient dimensions. By doing so, it is an object of the present invention to provide a water-cooled mold for metal melting and refining, which has a simple water-cooling piping system and is suitable for melting large size *a for manufacturing long-sleeved products.

Structure of the Invention The structure of the present invention in accordance with the above object is to form a unit by stacking two or more cylindrical molds made of copper or copper alloy in the axial direction and having a water-cooling jacket attached to the outer peripheral wall.
By continuing, we can create a mold with the necessary large capacity, and
A cooling water flow path is drilled through the seal ring and V flank provided on the Type II connection. i Kiri and Shimo 5! By communicating the side water cooling jacket, the interior of the seal ring and flange can be effectively cooled, completely eliminating the possibility of partial cooling of the outer peripheral wall at the connection part, and ensuring uniform cooling in the longitudinal direction. The gist is that it is a large-capacity type that can manufacture long and large 11)K.

Example Embodiments will be described below with reference to the drawings.

The water-cooled mold for metal melting and refining consists of an upper unit (A) and a lower unit (B) stacked and connected in the axial direction, and each unit has a water-cooled mold (20a, 20b) on the outer periphery of the mold body (10 m, 10b). (Figure #11, Figure 3).

The tin-shaped main bodies 10m and 10b are cylindrical and made of a saw or prepared alloy, and a seal ring 11a*1'lb is fitted to the upper end thereof through an O-ring 41 in a watertight manner and detachable. In addition, there are 7 runci 12i*12b on the lower ga part.
(Fig. 112, Fig. 3, Fig. 6).

The water cooling jackets 20a and 20b attached to the outer peripheries of the external mold bodies 10a and 10b have partitions 8121 inside.
It is divided into a double water chamber by a e 21 b,
7 runs 724a44b, 25g for mounting on both ends,
25b is provided protrudingly. In other words, is there water at the upper end? fP Yakef) 20a*20b upper flange 24a
, Z4b and 1 [Main Lot.

10b and the seal ring 11611b, and at the lower end, the lower flanges 25m, 25b and the mold body 1.
0a.

ZOa and 20b are installed by screwing the 7 fins y12m+12b of 10b with the setscrews 31 through the O-rings 32 (see Figures 2, 3, and 3). Figure 6).

Water cooling jacket 20a, Rob flanges 24a
# 24 b r25m, 25b is the external type cabin 10
a, a ring-shaped notch IZ near the outer periphery of LOb
6a and 26b are formal examples. On the other hand, partition f1121a
Supports 1122m and 22b that support t21b.

! 3m! 3ha, +fJ upper 1B1122a*! ! b
Although it is provided with a through hole 33, its lower part Z3a
, Z3b is a ring formed by ff1l[.

The details of the connection between the upper Enif) A and the lower Enif) B are as follows (Figures 4 and 5), the lower 7 runs y 25 m of the upper snow water LTR jacket 20 m, and the upper ** type log
A cooling water flow path 42 is provided passing through the upper flange 24b of the lower jas flange 12a1, the seal ring 11b of the lower stage 11a type 10b, and the upper flange 24b of the lower stage water-cooled gloss panel 20b.

This cooling water flow path 42 is a stepped hole with a large diameter on the sides facing each other inside the 7 flange 121L and the seal ring llb, and a metal watertight hole is inserted into the large diameter side via an O ring 44. They are connected by a universal joint 43.

Here, the cooling water flow path 4L and the female screw 31 are connected to the 7-7 sono 1
2m and seal ring llb are arranged alternately in opposing surfaces (FIG. 5).

On the other hand, the lower flange 25 of the upper water-cooled salmon y) 20m
a and the upper 7 langes 24b of the lower water cooling jacket 20b
are connected by a connecting bolt 46 via a pressure spring 45, and thereby the upper unit) A and the lower unit) B
An EA has been made.

A recess is formed in the lower end surface of the upper aS mold 1, and is fitted with the upper end surface of the lower m mold 10b to align the sleeves.

The water-cooled mold constructed as described above is placed on a water-cooled surface plate to form a bottomed mold, while the water-cooled jacket of the lower unit) B) 2
It's a water supply pipe (not shown) installed below the lower support ring 23b of 0b. Inject fr cooling water. Since the lower support rk 23b is closed, the injected cooling water passes through the notch 26b provided in the lower S flange 25b, first filling the inner ice chamber in contact with the mold peripheral wall, and then filling the notch 26b in the upper flange 24b. It flows through the partition tube 21b, fills the outer ice chamber through the through hole 33 of the upper support ring 2Zb, and fills the lower water-cooled glass (ZOb).

Furthermore, the upper water cooling jacket 2 passes through the cooling water flow path 42.
The cooling water that has reached 0a is
The upper water-cooling jacket (Zk) is filled in the same manner as in the inside of the lower support ring 23a, and is discharged from a drain pipe provided at an appropriate position above the lower support ring 23a.

In this way, the water-cooled Tsuyakera) ZOi40b has a double water chamber structure, so when molten and refined metal is dripped into the mold, even if the cooling water in the inner water chamber boils, there is still enough water in the outer ice chamber. Since fJ is stored, mold 10a*
Sufficient cooling of 10b is ensured.

Here, if we pay attention to the connection part of the molds 10a+10b,
Since the cooling water flows through the cooling water passage 42 that passes through the seal ring ITo and the flange 12a, which are connected by a watertight universal joint 43 made of metal, the seal ring 11b
Heat is removed sufficiently at the flange IZm, and there is no possibility that the temperature of the inner wall of the mold 10b and loa becomes excessively high at that portion.

Furthermore, the connection between upper unit A and lower unit B is as follows.
The flanges Z5a and Z4b protruding from the end of the connecting part gA of the water-cooled glossy plate 20a-ZOb are connected elastically to each other by the connecting bolt 46 via the pressure spring 45, so that the water-cooled glossy plate 20a-ZOb can be held in the mold. Even if the level of the molten metal dripped and injected reaches the vicinity of the connection part of the mold and the temperature of the lower stage mold 10b and that of the upper stage aS mold 10a become extremely unbalanced, the dimensional errors due to thermal expansion of each part can be effectively absorbed. , to prevent harmful stress from occurring in each part.

No. 2, the cooling water flow path 42 is connected via a watertight universal joint 43, so there is no risk of watertightness being destroyed even if there is some dimensional error in machining in addition to the dimensional error due to thermal expansion of each part. .

In addition, the ring rings lla, llb, especially 4&! on the lower Pi8n type 10b. ! The seal ring 11-b is
Because it is assembled with sufficient precision so as not to create a gap between it and the outer periphery of the mold 10b, the heat transfer between the two is not hindered, and therefore, there is no possibility that cooling of the mold 10b will be hindered in this area. It's not here, the seal ring ll
a, llb are removable from mold 10&.

In order to attach the water cooling jacket ZOi-20b to the outer circumference of the seal ring 1) abllb, install the water cooling jacket ZOi-20b, and then,
Attach seal rings lla and llb to each enif)A
, B can be completed, and the water cooling jacket 20a,
The same applies when disassembling ZOb or bond type 10a, 10b during inspection and repair.

The water $1) type described above has units stacked in two tiers, but it is also possible to stack the units in three or more tiers to increase the length and capacity.

In addition, the shape of the mold is not limited to a cylindrical shape, but can also be made into a rectangular shape depending on the shape of the final product.Furthermore, by providing a water supply and drainage system for each unit, cooling can be done for each unit. It is also possible to adjust the strength, and for example, the quality of the ingot can be limited by soft cooling the lower unit part.

Other embodiments and effects The seal ring llb of the lower mold 10b is 1llob.
Not only materials of the same quality as , but also precipitation hardening copper alloys (for example, Cr-Zr-Cu alloys) can be used.

At this time, since the seal ring Ilb is harder than the outer periphery of the mold 10b, even when the mold 10b thermally expands due to injection of molten metal and compressive stress is applied to the inner peripheral surface of the seal ring Ilb, the seal ring Ilb is plastically deformed. Therefore, since there is no possibility that a gap will be formed between the seal ring llb and the mold 10m, good heat transfer between the two can be maintained at all times.

Note that the seal ring lli of the upper ms type 10 turtle is installed in a location where the molten metal level cannot reach, so not only is such consideration unnecessary, but also good heat transfer inside it is not required. For example 5US30
Ordinary water-resistant structural materials such as No. 4 can also be used satisfactorily.

As described in detail, according to the present invention, a plurality of units each having a water cooling jacket attached to the outer periphery of a cylindrical mold are stacked and connected in the axial direction to increase the capacity, and the cooling water flow path at the connection part is increased. The cooling water piping system is connected to the lower unit by penetrating the seal ring at the upper end of the lower stage gA type and the flange at the lower ji part of the upper stage IIll1gJ type to connect the lower stage water cooling jacket and the upper stage water cooling jacket. Only the water supply pipe entering the mold and the drain pipe exiting from the upper unit are required, which is extremely simple despite the fact that it is a split type large-capacity water-cooled soda mold, and also provides sufficient cooling at the mold connection.
It has extremely excellent effects in that the uniformity of the IO mass is ensured and it is suitable for melting large-sized gjen for manufacturing long-sleeved products.

In addition, since it is possible to stack the molds in any number of stages (two or more), molds with the required capacity can be easily realized, and disassembly is also easy, so it is possible to have a spare mold for the lowest stage unit, which is the most susceptible to damage. Another advantage is that it is possible to operate a melting line with high reliability by only using the same method.

[Brief explanation of the drawing]

1IX1 to 6 show an embodiment, FIG. 1 is a partially cutaway overall perspective view, and tl & 2 to 4 are an enlarged sectional view of the W part in FIG. 1, and an enlarged sectional view taken along the x-xi arrows. Figure, Y-
FIG. 5 is an enlarged cross-sectional view taken along the Y line, and FIG.
Partial perspective view of the top of the lower tier (lower tier 2) when disassembled in tj
&6 is an enlarged sectional view taken along arrow 2-26 in FIG. 10a... Upper mold 10b... Lower mold 11
b・Ta1la type seal ring IZa...Upper stage lllIgJ type 7 ramp 20m...
・Upper water cooling jacket 20b...Lower water cooling jacket 24b...Upper 7 lunge 25 of lower water cooling rack 7)
a... Lower flange 42 of the upper Fi side water cooling jacket.
... Cooling water flow path 43 ... Watertight universal joint 45 ... Pressure spring 46 ... Connection bolt Fig. 1 Fig. 3

Claims (1)

[Claims] 1) Two or more cylindrical molds made of copper or copper alloy with water-cooling jackets attached to the outer peripheral wall are stacked and connected in the axial direction, and are removably fitted to the upper end of the lower mold. The sealed seal ring and the flange protruding from the lower end of the upper mold are made to face each other, and the lower water cooling jacket and the upper water cooling jacket are communicated by a cooling water passage bored through the seal ring and the flange. A water-cooled mold for metal melting and refining. 2) The lower mold and the upper mold are connected by elastically connecting flanges protruding from the connection side ends of water cooling jackets attached to each with connecting bolts via pressure springs. A water-cooled mold for metal melting and refining according to claim 1, characterized in that: 3) The cooling water flow path is formed by connecting stepped holes formed oppositely to each other in the seal ring and the flange via a watertight universal joint fitted in common to the stepped holes. A water-cooled mold for metal melting and refining according to claim 1. 4) The water-cooled mold for metal melting and refining according to any one of claims 1 to 3, wherein the material of the seal ring is precipitation hardening copper.