SU452424A1 - Die casting mold - Google Patents

Description

Invention from Osita to the field of production of cast billets from non-ferrous metals and their alloys on injection molding machines. A known mold for casting under pressure, containing fixed and movable half-molds with pushers, provided with rods that interact with the pushers in separating the sprues from the casting. The disadvantage of such a press company is the presence of a ragged trace in the casting after the sprue is removed from it, which degrades the quality of the castings and requires additional cleaning costs. The aim of the invention is to improve the quality of castings. For this, the fixed mold half of the proposed mold is equipped with rotary knives, the profile of the cutting edges of which coincides with the casting gate coupling contour, which ensures separation of the casting sprue from tipping with the mobile half-mold, while the BI sliding half-shape has slots for turning knives. FIG. 1 shows a mold before casting sprues from a casting; in fig. 2 is a section along A-A in FIG. one; in fig. 3 for & B in FIG. one; in fig. 4 - a general view of the mold at the time of pressing the metal; in fig. 5 shows a section along BB; in fig. 2; in fig. 6 - by YY in FIG. 3. The mold consists of a fixed half-form 1, made in the form of a plate t, placed on it by guides 2, a sprue bushing 3, swivel, knives 4 and axes 5, a movable half-mold | 6 with sockets 7 for accommodating the rotation of knives 4, plate 8 with guides 9 and rods 1O. The knives 4 are rotated around the axes Sj with the help of t g 11, for example, manually or from an electric drive. The cutting edges of the swivel blades coincide with the gate contour of the gate 12 with the casting 13. i The mold works as follows. At the moment of connection of the movable semi-form 6 with the fixed I, rotary but-hours. 4 enters into the slots 7 of the movable G of the semi-mold 6. At the same time, the rotary knives 4ng go in the extreme upper position (Fig. 2, shown by dash-dotted lines), the Mold is ready for pressing in the metal. After pressing the metal and solidifying the casting, the movable mold 6 is retracted from the fixed 1 at a distance greater than the height of the rotary knives 4. The rotary knives 4 are manually or using a separately installed actuator, for example, the electromagnetic set-regs to the lowest position. In this case, the cutting edges of the rotary knives are dimensioned (Schottan against the points of conjugation of castings with litnik M, the movable half-form 6 feeds towards the fixed half-form 1, and under the influence of the feeding force of the movable half-form 6, the sprue 12 is cut off from the o-glue 13 And the place is cut kilo ti ka | In the position, which provides with the help of a plate of 8 soles, rods 1O, removal from it; 50; 13 and the sprues cut off from them; 12. The rotary knives 4 are moved to the uppermost position, the movable half comes with a fixed The cycle is repeated. Shadow subjugation j A compression mold for pressurized {containing mobile and stationary on | Luform, fasteners and a mechanism for separating sprues, characterized in that, in order to improve the quality of castings, the mechanism for separating sprues is rotary knives mounted on a fixed half-form, and in the mobile half-form there are nests for / under the knives. AFig 2 A

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FIG. 3 FIG.

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