SU804192A1 - Arraratus for applying coating on inner surface of centrifugal mashine ingot mould - Google Patents

Description

The invention relates to drinking production, in particular to equipment for centrifugal litts and can be used to obtain centrifugal cast billets.

A device for applying ⁵ coatings on the inner surface of a mold of a centrifugal machine of a puncheon screw type, consisting of a horizontal cantilever screw, which at its end enters the cavity of the lined mold. The auger is driven into rotation by a stationary mechanism and feeds the mixture from the measuring hopper into the cavity of the mold mounted on the trolley. ^ As the mold is compacted, the trolley is mixed. The hole in the mold is calibrated by a freely rotating punch £ 1}

The disadvantage of this device is the complexity and cumbersomeness of the design, the impossibility of its use for all types of linings used, for example, from bulk mixtures, as well as the great complexity both when applying and removing linings, and when replacing molds after each casting.

A device for coating (from bulk materials) on the inner surface of a mold of a centrifugal machine is known, including a cantilever measuring slotted trough, a trolley carrying a trough and having mechanisms for moving it and rotating the trough around a longitudinal axis. A heat insulating coating is applied to the pQ rotating mold.

The disadvantage of this device is the impossibility of lining the mold with the formation of 2-3 layers in one run of the gutter, which reduces the productivity of the machine and the quality of the lining, while the expediency of a two-layer lining is established when the inner layer of coarse-grained material serves as thermal insulation, and the outer layer of fine-grained materials - to ensure a clean surface. Sometimes, when casting steels, to reduce the burn, backfill (1-2 mm) of pulverized zircon is used on the main quartz sand spoil.

Pel invention - improving the efficiency of the device and expanding its technological capabilities.

The chain is achieved by the fact that in the device for coating the inner surface of the mold of a centrifugal machine, the cantilevered slotted chute is equipped with a rod with two or more section nozzles mounted on it along the longitudinal axis and a mechanism for sequential opening of the sections.

In FIG. 1 shows a device, a General view; in FIG. 2 - section AA in figure 1 (slotted trough, consisting of three sections B, C and D).

The device consists of a cantilevered measuring chute 1, with a slit window 2 along its longitudinal axis. The gutter with one condo is mounted on a trolley 3 having mechanisms for moving it and turning the gutter around a longitudinal axis. On the stem 4, a sectional nozzle 5 is installed with partitions fixed on it. 6, which form sections of the gutter along its longitudinal axis with valves 7 for closing the slit window. The rotation of the rod 4 with partitions and valves is carried out by a mechanism 8, consisting of an electric actuator 9 and a gearbox 10. To fix the position of the slotted window, a screw 11 is made.

The device operates as follows.

In the loading position, the chute is installed upward by the slotted window 2 and fixed with a screw 11. By rotating the rod 4 using the mechanism 8, sections B, C and D are sequentially moved above the slotted window. In the unloading position, the chute is introduced into the rotating molds by the trolley 3, it is mounted with a slit window down, fixed with a screw 11 and, by moving sections B, C and D in sequence with the Q _t mechanism, the chute is unloaded.The proposed device reduces the time for applying a multilayer lining by 2-3 times. For example, for production

804192 4 one centrifugally cast billet on an NM-100 machine with a three-layer coating by a known device takes 120 minutes of machine time, including 5 times of coating, which is 30-35 minutes. Using the proposed device, it only takes 95-100 minutes, and the lining time of the mold is reduced to 8-10 minutes. that Yu increases the productivity of the machine NM-100 by 20-25%. Reducing the time of applying a multilayer coating (up to .. 8-10 min) creates additional opportunities for using the components of myo ₁₅ state-of-the-art coating from materials significantly different in physical and chemical properties, and provides a higher quality multilayer lining of _{20 with} different composition and density materials. The latter is due to the fact that when the coatings are in the rotating mold for a long time due to centrifugal forces, redistribution of light and heavy layers ₂₅ over the coating thickness occurs, reducing the effect of using a multilayer coating. Higher quality of the lining allows to reduce the machining allowance by 1.5-2 times.

Claims (2)

Levies (1-2 mm) of powdered zircon on the main quartz sand sand are applied to reduce the burn. Uenb invention - poviepie efficiency of the device and expanding its technological capabilities. The delivered chain is achieved by the fact that in the device for coating the inner surface of the mold of a centrifugal machine, the console television measuring chute is equipped with a rod with a two or more sectional nozzle mounted on it along the longitudinal axis and a mechanism for sequential opening of sections. FIG. 1 shows the device, a general view; in fig. 2 is a section A-A in Fig. 1 (the slotted chute, consisting of three sections B, C and D). The device consists of a cantilever chute 1, with a slit window 2 along its longitudinal axis. The gutter is fixed at one end on the trolley 3 having mechanisms for moving it and turning the gutter around the longitudinal axis. A section nozzle 5 with partitions fixed on it is mounted on the rod 4. 6, which form the gutter sections along its longitudinal axis with valves 7 for closing the slotted window. The rotation of the plug 4 with partitions and valves is carried out by the mechanism 8 consisting of the electric drive 9 and the reducer 1O. A screw 11 is made to fix the position of the slotted window. The device operates as follows. In the loading position, the chute is set up with the pinhole window 2 upwards and filled with a screw 11. The rotation of the stem 4 using the mechanism 8 carries out the sequential movement of sections B, C and D above the slotted window. In the unloading position, the trolley 3 is inserted into the rotating frame with a slit window, fixed with a screw 11 and, successively moving the securing blades B, C and G by the mechanism 8, the chute is unloaded. The proposed device shortens the time for applying the multilayer lining in 2-3 times. For example, it takes 120 minutes of machine time, including a coating time of min., To produce 24 of one dent-casting billet on a CM-OO machine with applying a three-layer coating with a known device. With the use of the proposed device, this takes only 95-100 minutes, and the lining time of the mold is reduced to 8-10 minutes. which increases the performance of the 11M-100 by 2-25%. Reducing the time of application of the multilayer coating (up to 8-10 mWO creates additional possibilities for using the components of the multilayer coating of materials that differ significantly in physical and chemical properties, and provides a higher quality multilayer lining from materials of different composition and density The latter is due to the fact that when the coatings stay in the rotary mold for a long time, due to centrifugal forces, light and heavy layers are redistributed throughout the coating thickness, reducing the effect of multi-layer coating. Higher quality lining reduces the machining allowance by a factor of 1.5-2. Claims The device for coating the inner surface of the mold is a center of a robotic machine containing a carriage carrying a cantilever slot chute and moving mechanisms its rotation and the chute, which is indicated by the fact that, with the aim of increasing the efficiency of the device and expanding its technological capabilities, the slot chute is equipped with a stem with m along the longitudinal axes of the two or more sectional nasEschkoy situated within the trough, and a mechanism for sequentially opening sections. Sources of information taken into account during the examination 1. Nebogatov Yu. D., Tamarovsky V. I. Special types of pouring. M., Mechanical Engineering, 1975, p. 137, fig. 85. 2. Pischev, V.M. Molds for centrifugal casting of pipes. M., Metallurgizdat 1961, p. 18. ///(,