RU2075363C1 - Casting mould mainly used for hardware casting - Google Patents

Abstract

FIELD: casting production, series and small series production of hardware bodies and lids castings. SUBSTANCE: to produce joining surfaces of bodies flanges without mechanical working and with cast cool fixation holes forming flanges are made one-piece with holes for rods fixation. To increase cooling capability coolers are connect ted with body of container and with special detachable plate. EFFECT: improved production process. 4 cl, 5 dwg

Description

 The invention relates to foundry for the manufacture of castings in small batch and mass production. A known mold for producing castings of ship reinforcement (see Progressive methods for manufacturing castings of high accuracy, edited by A.A. Yatsenko, Leningrad, LDNTP, 1978, p. 59), containing the upper and lower half-molds made in the form of flasks, filled with a molding mixture in which the working cavity of the casting mold of the castings is modeled. In the molding mixture of the lower half-mold, a shaped rod is installed by the iconic part, on which the refrigerator is placed from the side of the casting flanges.

 The disadvantage of this device is its high material consumption, due to the placement of refrigerators and iconic parts of the rods directly in the molding mixture, the dimensions of the mold are determined by the volume of the mixture.

 A known mold is predominantly for the manufacture of body fittings (see AS USSR N 1652025 class B 22 C 21/00, 1991), which contains flask, on the fret side of which there are recesses in which refrigerators with pins are installed, for mounting holes in the casting. Significant parts of the rods are placed in refrigerators. The disadvantages of this casting mold include its limited use by certain types of castings in mass production, the need for special flasks, the inability to obtain connecting flanges without machining, since the refrigerator is detachable both in the lower and upper flasks. High metal consumption for gating system.

 Known casting mold with a vertical connector with the fill in a vertical position (see R.S.L. Andrews, "Shell casting technique in the United States" Translated from English. Engineering, M. 1968. S. 175, 178). The disadvantages of these forms include the high consumption of metal on the gating system, since each assembled form has a gating cup and riser, each mold is cast separately. A long time of pouring the alloy and a significant consumption of metal for splashing liquid metal during the pouring process. Long-term cooling of the castings in the mold.

 Foundry molds for siphon-stack filling of parts are known (see AM. Petrichenko Stop casting of parts. Mashgiz. 1950, p. 70 77). The disadvantages of these forms include their complexity, high labor costs, the need to obtain a siphon gating system in special refractory tubes outside the stack, and large dimensions.

 The aim of the invention is to improve the quality of castings, reducing the production cycle, reducing material consumption, reducing the cost of preparation of production, especially in small-scale and single production. Reducing the volume of machining of castings.

 This goal is achieved by the fact that in the forms contained two flaskless half-forms, refrigerators are made whole with holes, they are installed in the recesses of the half-forms. Refrigerators and half-forms have special signs for the exact fixation of refrigerators in half-forms. Rods and refrigerators connect the half-forms into a single whole. The presence of feeders in the lower part and open profits in the upper part of the half-molds make it possible to paint the working surface and the rods directly in the assembled form by filling the form with penetrating paint and then removing it by pouring.

 The paint in the mold fills the gaps between the rods and the refrigerators.

 The castings obtained in these molds will have minimal costs when cutting, stripping and machining. To facilitate weight, refrigerators can be made of graphite electrode. The sizes of the half-molds are normalized, and the installation of the molds in containers is carried out both in the longitudinal and transverse directions. Various castings can be made both in one form, and in different. Casting in molds is carried out through one riser.

 Normalization of half-forms allows you to have a normalized snap-in for flask-free manufacturing of half-forms. Models can be removable quickly changeable. The role of the flask will be performed by a container with removable plates, allowing to intensify the cooling of thermal units through refrigerators. Tooling costs in the manufacture of castings will be minimal, which will drastically reduce the time for preparation of production. In FIG. 1 shows the proposed casting mold top view and section GG, in FIG. 2, section AA in FIG. one; in FIG. 3 section BB in FIG. one; in FIG. 4 section CC in FIG. 3; in FIG. 5 shows the application of the proposed mold for the manufacture of various castings of reinforcement.

 The proposed mold of FIG. 1 consists of half-molds 1 and 2 having special recesses and locks for precise fixing of refrigerators 3, 4. The refrigerators have holes for fixing the rod 5 in the cavity of the casting 6, the casting is filled through a riser with a gate funnel 7 made in the rod 8 of the container 9 The metal from the riser with a funnel 7 enters the gate 10, made in the pan 11, and from it into the feeder 12 and the casting 6. For supplying metal on the flanges of the casting 6, 14 easily removable profits are installed through the grid 13. To strictly fix the halves of the molds, the half-molds are pulled together by bolts 15 using a metal plate 16. To increase the heat transfer of the refrigerators 3, they are connected to the wall of the container 9 and the removable plate 17. From the two sides between the walls of the container 9 and the molds burned molding mixture 18. Burned molding mixture 18 prevents metal from escaping along the parting line of the half-molds 1 and 2, and makes it easy to remove chilled castings from the container together with the gating system.

 In FIG. 2 shows a section aa in FIG. 1 and shows the location of the castings 6 in the container 9 with the gate system, the riser with the funnel 7, the gate 10, made in the rod 19. Easily separated profit 20 for powering the upper flange is located in the rod 5.

Claims (4)

 1. The mold mainly for the manufacture of reinforcement castings, comprising a container with a pallet, flask without molds, refrigerators and rods, characterized in that each refrigerator is made integral with a hole for the sign of the rod forming the cavity in the casting, and holes for the signs of the rods forming the mounting holes in casting flanges.  2. The mold according to claim 1, characterized in that the gate is made in the pallet.  3. The mold according to claim 1, characterized in that the end surfaces of the refrigerators are associated with the walls of the container body.  4. The mold according to claim 1, characterized in that a removable metal plate is installed to enhance the cooling of the refrigerators.

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