JPS647016Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a weight used in a foundry to prevent an upper mold from floating when pouring metal into a mold.

In general, methods for suppressing the floating of the upper mold during pouring include, for example, a method in which a plate-shaped weight is placed on the mold, a heavy cope method in which the casting flask itself has a function (weight) as a weight, or mold matching. A method is known in which the upper and lower frames are tightened together using hooks. However, in the case of the above-mentioned weight method, since the metal is poured through an opening formed in the weight, the position of the sprue of the mold, that is, the position of pouring the metal, is restricted, making it difficult to adapt to changes in the mold.
Moreover, the position of the pouring nozzle of the pouring machine is increased by the height (thickness) of the weight, and the pressure of the molten metal applied to the upper mold of the mold during pouring is proportional to the head of the molten metal. The higher the position of the pouring hole in the ladle, the greater the pressure of the molten metal, and the weight of the weight must be increased accordingly. However, if the weight of the weight is increased, its volume and eventually its height will also increase, making it necessary to further raise the position of the pouring hole in the ladle, which in turn increases the pressure of the molten metal, creating a vicious cycle. For this reason, there are problems such as it is extremely difficult to completely prevent casting from forming at the parting part of the product, and in the case of the Hebukop method, the weight of the casting flask is large, so the molding machine and It is necessary to increase the capacity of conveyance-related equipment, etc. Furthermore, in the case of the core method, the structure is complicated and automation is difficult, and there are disadvantages such as high cost because all casting flasks are equipped with it.

The object of the present invention is to provide a pouring weight that is suspended from a casting flask, thereby eliminating the drawbacks of the conventional method described above.

Hereinafter, the present invention will be specifically explained based on the illustrated embodiments. First, to explain the embodiment shown in FIGS. 1 to 4, the pouring weight 1 has an inner dimension slightly larger than the outer dimension of the flask 10 and a height as shown in the figure. It is formed into a rectangular frame shape that is slightly smaller than the height of the flask 10, and can be fitted into the flask 10 from above with an appropriate amount of play. The frame body 2 constituting the main body of the weight 1 has an inner circumferential surface tapered outward from the upper end to the lower end so that it can be easily fitted into the flask 10.
Further, a locking hook 3 is integrally provided on the upper end edge of the frame body 2 and can be locked to the upper end edge of the flask 10 or a flange protruding from the outer peripheral edge of the flask. That is, in this embodiment, a total of three locking hooks 3 are formed at the center position of one short side of the frame body 2 and at one side position of each long side, and the weight 1 is attached to the flask 10. In the fitted state, they are suspended and supported via a locking hook 3.

Two positioning protrusions 4 are integrally formed on the upper inner surface of each long side of the frame 2, and one positioning protrusion 5 is integrally formed on the upper center of the inner surface of each short side. These six protrusions 4 and 5 in total face the side surface of the flask 10 with a very small gap when attached to the flask 10 to suppress wobbling of the frame body 2 with respect to the flask 10. . Note that the lower portions of the protrusions 4 and 5 are continuous with the inner surface of the frame body 2 by the tapered surface 6 to facilitate fitting. Frame body 2
Two vertically long relief grooves 7 are formed at the lower part of the inner surface of each short side in order to avoid interference with the loading/unloading grip piece 11 formed on the flask 10. A recess 8 is formed on the lower edge of the flask 10 to avoid interference with a gripping piece 12 formed on the flask 10, and a weight 1 is attached to the lower edge of each long side. Two engagement recesses 9 are formed in each case, into which lifting claws (not shown) of a weight transfer device to be attached and detached are engaged.

As described above, the pouring weight 1 in this embodiment is fitted into the flask 10 and suspended via the locking hook 3, which allows the top surface of the mold to be left completely open, placing no restrictions on the pouring operation or on changing the pouring position, and also making it easy to attach and detach the weight from the flask 10, without any of the problems associated with the conventional heavy cope and hatsuka methods described above.

In another embodiment shown in FIGS. 5 and 6, the weight 1 is provided with four locking hooks 3 to provide a four-point support type, and the locking hooks 3 are separate from the frame 2. The locking hook 3 is constructed and attached by, for example, a bolt 13, so that when the locking hook 3 becomes worn or broken, it can be replaced with a new one.

Although not shown, the locking hook 3 can be formed in the shape of a brim around the entire periphery of the frame 2, and can also have an engagement recess for engagement with the lifting claw of the weight transfer device. 9 can be replaced by appropriately providing a protrusion on the outer surface of the frame 2.

As mentioned above, the present invention solves the problems seen in the conventional method by forming the pouring weight into a frame shape and suspending it in a fitted state in the casting flask. It does not interfere with changing or pouring water, and is extremely effective in practice.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view showing a pouring weight, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. 3 is a sectional view taken along the - line in FIG. 1. , FIG. 4 is a cross-sectional view of FIG. 3, FIG. 5 is a schematic plan view showing a pouring weight of another embodiment, and FIG. 6 is a cross-sectional view showing the attachment state of the locking hook. . 1... Weight, 2... Frame, 3... Locking hook.

Claims (1)

[Scope of utility model registration request] A pouring device, characterized in that it is formed into a frame shape whose internal dimension is slightly larger than the external dimension of the flask, and a locking part that can be locked to the flask is formed in the upper part of the frame-shaped member. Weight.