JPS6027557Y2 - Continuous casting mold - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a continuous casting mold.

Prior to the explanation of the present invention, the outline of the molding device will be explained based on FIG. This is a water cooling box that cools the side copper plate 1a from behind.

The mold 1 and the water-cooled box 2 are placed on a frame 3 of a mold vibrating device.

In this configuration, when molten metal is injected into the mold 1 and continuous casting is started, the long side copper plate 1a is thermally expanded in the longitudinal direction, that is, in the direction of arrows A and B in FIG.
Thermal expansion is large in the area corresponding to the high temperature range between the height position (at the height of

Next, when the continuous casting is stopped, the long side copper plate 1a is thermally shrunk in the opposite direction of arrow A9B.

Conventionally, the longer side copper plate 1a is firmly restrained by tightening bolts from the rigid back plate side, so when the thermal expansion and contraction are repeated as described above,
Internal stress is generated in the long side copper plate 1a, and the elastic deformation becomes plastic deformation, and the initial normal state shown by the solid line in Figure 2 changes from the initial normal state shown by the solid line in Figure 2.
The width in the longitudinal direction contracts, and the contraction causes deformation as shown by the broken line in the figure.

When the fan-shaped deformation becomes excessive, the cooling water seal (0 ring) between the long side copper plate 1a and the water cooling box 2 comes off, causing water leakage.

Further, the short side copper plate 1b located between the long side copper plates 1a becomes unable to maintain the specified opening size (position and orientation) due to the contraction of the long side copper plate 1a, and becomes reversely tapered.

Therefore, the present invention provides a continuous casting mold that solves these problems.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 4 to 6.

Reference numeral 5 denotes a key that connects both ends of the long side copper plate 1a to the water cooling box 2, and is fixed in the premises along the vertical direction of the water cooling box 2, and is located in a high temperature area from a position slightly below the hot water level. It is placed at a height position corresponding to

Further, a recess 6 is formed at each end of the copper plate 1a to fit into the key 5, and between the key 5 and the inner surface of the recess 6, the copper plate 1a is thermally expanded in the direction of arrow A9B. A slight gap a is formed to allow this.

When molten metal is injected into the mold 1 having such a configuration, the long side copper plate 1a will thermally expand in the direction of arrow A9, but in this case, since there is a gap a, the copper plate 1a will expand smoothly. .

On the other hand, when continuous casting is stopped and the long side copper plate 1a is thermally shrunk, the copper plate 1a shrinks smoothly due to the gap a, and returns to the state shown in FIGS. 4 and 6. .

If the long side copper plate 1a tries to contract further in the direction opposite to the arrow A9 from this illustrated state, the key 5
This prevents its contraction.

In particular, since the key 5 is arranged at a part of the long-side copper plate 1a where thermal contraction is most severe, the copper plate 1a will not be distorted.

Furthermore, it goes without saying that the key 5 prevents the long side copper plate 1a from thermally expanding and contracting in the vertical direction.

As mentioned above, according to the continuous casting mold of the present invention, 1.
Keys connecting both ends of the long side copper plate to the support are arranged along the vertical direction, and a slight gap is provided between each key and the copper plate or water cooling box to allow thermal expansion of the copper plate in the longitudinal direction. Because of its shape, when molten metal is injected into the mold, the copper plate on the long side can smoothly expand with heat, and conversely, the copper plate on the long side can smoothly shrink due to heat. Furthermore, the key prevents the long side copper plate from shrinking too much due to heat.

Therefore, unlike the conventional example, the long side copper plate does not deform into a fan shape due to repeated thermal expansion and contraction, and can maintain its initial shape.

[Brief explanation of drawings]

Figure 1 is a schematic plan view of the mold apparatus, Figure 2 is a front view of the copper plate on the long side, Figure 3 is a graph showing the relationship between the height of the copper plate and temperature, and Figures 4 to 6 are examples of the present invention. An example is shown, and FIG. 4 is a front view, FIG. 5 is a side view, and FIG. 6 is a partially cutaway plan view. 1... Mold, 1a... Long side copper plate, 2
...Water cooling box (support), 5...Key
6... Concavity, a... Gap.

Claims (1)

[Scope of utility model registration request] Both ends of the copper plate on the long side constituting the mold are connected to the supporting body of the copper plate by keys, and both keys are arranged along the vertical direction, and the copper plate is placed between each key and the copper plate or the water cooling box along the long side. A mold for continuous casting, characterized in that a slight gap is formed to allow thermal expansion in the direction.