RU2243850C1 - Chill mold with vertical parting plane for casting by dipping - Google Patents

Abstract

FIELD: foundry, namely casting pistons of internal combustion engines.

SUBSTANCE: chill mold includes mold halves with protective jackets, molding core and molding bottom. Feeders are provided in bottom. Assembled mold is dipped into melt fed through bottom feeders into mold. After crystallization of casting, mold is raised and mold halves are parted. Casting hold by shrinkage on core separates from bottom and moves upwards. Intermediate stops rest upon stationary one and by means of knocking out member casting is removed from core.

EFFECT: simplified mechanism for knocking out casting, enhanced operational reliability and lowered size of said mechanism.

3 dwg

Description

The invention relates to foundry, in particular to the design of the mold with a vertical plane of the socket for injection casting, mainly castings of pistons of internal combustion engines.

Known metal mold with a vertical plane of the connector for immersion casting, including two movable half-molds with protective casings, the ejection mechanism of the casting and bottom feeders (USSR author's certificate No. 872021, M.cl ³ V 22 D 23/04, 1981).

The known metal form has a complex structure of the ejection mechanism of the casting, including two levers, two twin pusher plates, pushers and counter pushers. In addition, the horizontal position of the pushers significantly increases the dimensions of the mold in plan, which is extremely undesirable when casting by immersion due to the limited internal dimensions of the bath with the melt.

An object of the present invention is to provide a new design of a mold with a vertical plane of the connector for dipping castings of a wider range of castings with a simplified and more reliable mechanism for pushing out castings, which makes it possible to reduce the dimensions of the mold.

To achieve the technical result, the proposed metal mold with a vertical plane of the socket for immersion casting, including two movable half-molds with protective casings, a casting ejection mechanism and bottom feeders, is equipped with a movable metal forming rod and a forming bottom located between the half-forms in the lower part and fixedly mounted on the manipulator with the help of a crossbeam and vertical rods, on which along the periphery cuts are made for bottom feeders, and the mechanism the ejection of the casting is combined with a movable metal forming rod, located vertically and includes a ejector in the form of a sleeve mounted movably on this rod, intermediate stops mounted on the same rod movably, and a fixed stop fixed to the manipulator, and the ejector at the beginning of the rise of the metal forming rod interacts with the intermediate casting stops with the casting and through them further, at the time of casting reset, with a fixed focus on the manipulator.

Figure 1 shows the proposed metal form, its longitudinal section; figure 2 - view BB in figure 1; figure 3 is an open form with a pushed cast in longitudinal section.

The mold contains two movable half-molds 1 with protective casings 2, a shaping rod 3, casting ejector 4 and bottom feeders 5. The mold is equipped with a shaping bottom 6, which is placed between the half-molds in the lower part and fixedly mounted on the manipulator (not shown) using the crossbar 7 and vertical rods 8. On the bottom along the periphery cuts were made for bottom feeders 5. The ejector is made in the form of a sleeve and is mounted movably on the forming rod. The mold also contains intermediate stops 9, a restriction screw 10, a water supply pipe 11, fingers for forming holes in the casting 12, inserts 13, the body of the shaft 14 and the suspension plates 15.

The form works as follows.

Figure 1 shows the assembled form before pouring metal. The tube 11 receives water and cools the rod 3. The mold is immersed in the melt. In this case, the liquid metal enters the working cavity through the bottom feeders 5. The mold is held in the melt in a stationary position until the casting solidifies completely, then it is lifted and opened. First, the half-molds 1 are moved apart in the horizontal direction with the help of hanging plates 15 fixed to the manipulator. The casting remains on the rod 3 and the bottom 6. The casing 14 and the rod 3 are lifted by the manipulator hydraulic cylinder. The casting, which is firmly held by shrinkage on the rod, is removed from the bottom and moves up. At a certain point, the intermediate stops 9 during their movement encounter a fixed stop mounted on the manipulator (not shown), stop and, resting on the ejector 4, stop it, and with it the casting 16, as shown in Fig.3. The body of the rod 14 and the rod 3 are lifted until the casting comes off the rod completely. In this case, the ejector hangs on the restriction screw 10, and the casting falls on a special catcher (not shown) and is removed from the mold zone. This ends the cycle.

The form is assembled and prepared for filling in the reverse order. First, the half-molds 1 are shifted, then the rod 3 is lowered. The dropper 4, lowering, rests against the shoulder in the half-molds and occupies its fixed place, and the body of the rod 14 presses on top of it. Thus, the mold is ready for the next filling.

In the proposed invention, in comparison with the prototype, the ejection mechanism of the casting is simplified, the number of parts is reduced, which increases the reliability of its operation. The vertical arrangement of the mechanism allowed to reduce the dimensions of the form in the plan.

Opportunities for expanding the nomenclature of the obtained castings in this form have significantly increased due to the use of the forming bottom and, therefore, the complexity of the external configuration of the castings.

Claims (1)

A metal mold with a vertical plane of the socket for injection molding, containing two half-molds with protective casings, a casting mechanism and bottom feeders, characterized in that it is equipped with a movable metal forming rod and a forming bottom located between the half-forms in the lower part and fixedly mounted on the manipulator with using the crossbar and vertical rods, and along the periphery of the bottom cutouts are made for bottom feeders, the mechanism for pushing the casting is located vertically contains a ejector in the form of a sleeve mounted movably on the forming rod, intermediate stops mounted on the rod movably, and a fixed stop fixed to the manipulator, while the ejector at the beginning of the rise of the forming rod with casting has the ability to interact with the intermediate stops, and the intermediate stops at the moment casting dump - with a fixed emphasis of the manipulator.

Images