SU831303A1 - Lined chill mould - Google Patents

Description

(54) COUPLED OBJECTED

I

The invention relates to a foundry, in particular to casting in a veneered box, which makes it possible to obtain castings with a differentiated structure and increased dimensional accuracy.

Most often, on lines to be poured into lined KOKSHS, split lengths and widths which are significantly greater than height are used. Facing on the chill mold is created by filling the gap between the model and the chill mold with a facing mixture. The ventilation system of the cavity filled with the mixture has a great influence on the density of the cladding and the cleanliness of the surface of the castings.

Chill molds are known that contain ventilation ducts made in the form of grooves with a thickness of 0.2 to 1 mm, located around the working socket in the surface of the chill mold and combined into ventilation manifolds. This ventilation system gives a good quality of lining only around the perimeter of the mold, the removal of air from the inside of the mold is difficult, which is especially important when casting in a small mold

According to the size of thin-walled castings of complex | profile

Chill molds are known, where the ventilation grooves are not supplied to the edge of the mold, but to a special through-hole that goes to the outer surface of the mold, but ventilation plugs are used to vent deep cavities. When outputting through the through ventilation ducts, a more uniform quality of lining 1 is achieved. However, in the course of operation, the ventilation ducts are filled with metal, clogged, which impairs or completely blocks the air outlet during the adjustment process and impairs the quality of the lining.

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Claims (2)

The closest to the proposed is a lined metal mold containing a holder in which composite normalized elements are installed, between which ventilation channels are formed, and in the normalized elements, the grooves forming inflatable channels are alternated with the ventilation channels. Due to the development of inflatable and ventilation ducts and their alternate location, it is possible to obtain quality cladding on the molds of a given dimension with the nomenclature from; stitches that fit into this snap-in 2. However, in this design, the ventilation channels exit to the outer surface of the molds, during the work they clog up and the quality of the lining is reduced. The probability of clogging and metal filling of the ventilation ducts increases significantly with an increase in the number of working sockets in the chill mold, which makes it impossible to increase the performance of the line. This ventilation system does not allow a high-quality lining when casting small-sized thin-walled castings of a complex profile, higher dimensional and weight accuracy, which leads to a large volume of their machining. The purpose of the invention is to increase the reliability of the mold in operation. This goal is achieved by the fact that the verification ventilation ducts are made deaf, and connected to horizontal KaHibnavtH, which have leads for connecting the atmosphere to the surface through the side surface. FIG. Figure 1 shows a general view of the mold in a section along penta tion channels; in fig. 2 shows section A-A in FIG. 1. Fa37 eMHbHi chill mold consists of the upper 1 and lower 2 half-molds. Both halves have working slots 3 and a ventilation system in the form of grooves 4, vertical 5 and horizontal ø, 1x 6 channels. The location of the grooves 4 and their dimensions depend on the mutual arrangement of the working nests. The grooves are supplied to the vertical channels 5. The vertical channels become deaf and the coefficients are horizontal with channel 6. The horizontal channel is located in the body of the metal mold and has an outlet to the atmosphere through the side surface . 4 The work is carried out as follows. When facing the cladding on the metal mold, air is withdrawn from the working nests 3 through the ventilation slots 4, non-through vertical channels 5 and the horizontal channel 6, which has an outlet through the lateral surface of the metal mold. The presence of the main horizontal channel ensures the removal of air, eliminates clogging with the remnants of the cladding and liquid metal, and allows using a vertical channel to ensure a uniform discharge of air while increasing the working nests of the chill mold. The proposed mold with ventilating channels allows to increase the number of nests in the mold by 1.5 times with the same dimensions due to the use of the internal zone of the mold. This leads to an increase in line capacity by 40% and dramatically reduces metal consumption by reducing gating channels. Claims of the Invention A lined chill mold containing semi-molds with a ventilation system is designed so that, in order to increase the reliability of the chill mold in operation, the ventilation system is implemented in the form of interconnecting vertical and horizontal channels, In this case, the vertical channels are made deaf, and the horizontal channels are provided with contacts for communicating through the side surface of the chill mold with the atmosphere. Sources of information referred to in the examination 1.Girshovich N. G. Handbook of iron casting. Ed. 3. L., Maschinostroenie, 1978, 2. USSR author's certificate number 561616, cl. B 22 D 15/00, 1976. FIG. 2