SU846067A1 - Moulding hopper to machine for producing shell semimoulds - Google Patents

Description

one

The invention relates to foundry production, in particular to equipment for the manufacture of shell molds.

Known molding hopper containing a rotary hopper with a loading neck and a rotary KREZGShkoy and feed tank with a shutter located above the loading neck 1.

The disadvantage of this bunker is its complicated structure, which requires opening and closing mechanisms.

The purpose of the invention is to simplify the design of the molding hopper.

The goal is achieved by the fact that the bunker is equipped with an elastic pipe installed on the supply tank, the lower end of which is located in the loading neck, and the rotary cap is installed inside the rotary bunker.

FIG. Figure 1 shows schematically the molding hopper of a shell mold making machine (during mixture loading), a general view; in fig. 2 shows a forming hopper during the formation of a half-form, general view; in fig. 3 - molding hopper.

general view (rotated 90 °); in FIG. 4 the same is rotated in FIG. 5 - view A on the swiveling cover; in fig..b section aa in fig. five; in fig. 7, 8, 9, 10, 11, 12, 13, 14 - elastic tube and loading neck of the rotary bunker, options for cross-sectional diagrams. The forming hopper consists of 10 door hoppers 1 mounted in the holder 2, which can be rotated 180, for example, by means of a piston rod cylinder (not shown). Mechanism 3 is fixed on holder 2, including piston cylinder 4, guides 5 and shafts € for clamping to flange 7 of hopper 1 of model plate 8. Between model plate 8 and shafts b on one side and flange 7 on the other hand have gaps . Model plate 8 is supplied to the formation position by mechanism 9. Piston cylinders (not shown) of the sector pie 10 actuator 10 are mounted in the holder 2, dividing the hopper 1 into two parts. A molding mixture 11 is located above the gate 10 and is fed into the hopper 1 through a loading neck 12, on which a rotary cap 13 is fixed, carrying a rigid plate.

Claims (2)

30 C. And counter load 15, Elastic pipe 16 is placed coaxially with loading neck 12 above hopper 1, which is fixed on dispensing neck 17 of feed tank 18 fixed permanently on machine bed 19. Discharge tank 18 is equipped with version 20. Failure of the mixture to drain into the gaps between the elastic pipe 16 and the charging port 12 is provided in all cases by the angle of repose of the powder mix,; which under small optimal conditions for the fluidity of the mixture cannot be: less than o. The cross sections of the elastic pipe 16 and the feed neck 12 of the rotary hopper 1 can be round, square, rectangular, elliptical, oval, etc. form, and the neck of one form can be combined with an elastic tube of another form. By way of illustration in FIG. 714 shows several cross-sectional diagrams of the elastic pipe 16 and the loading neck 12 of the rotary hopper 1. In order to ensure the free entry of the elastic pipe 16 into the loading neck 12 after turning the hopper 1, with deformation. elastic pipe 16, it is necessary that the internal cross section of the loading neck 12 be larger than the external section of the elastic pipe 16. At the same time, in the rotational area of the hopper 1, all combinations of sections of the elastic pipe 16 and the loading neck 12, except for two round sections (see , 7), can be installed with or without a gap. The combination of two circular sections requires a required clearance in the specified plane. The work of the molding hopper is as follows. Coming to the position of forming the model plate 8 by the shafts 6 of the lifting mechanism 3 is removed from the mechanism 9 and pressed against the flange 7 of the bunker 1. The shutter 20 of the feed tank 18 is closed. Gate 10 is driven by a hydraulic cylinder (not shown in Fig.) Outside the hull 1 case, and the mold mixture 11, vertically above the gate 10, feeds vertically onto the model plate 8. The position of the forming hopper at the moment of formation is shown in FIG. 2. Upon completion of the formation of the semi-half 21, the hopper 1 with the model Plate 8 and the pressing mechanism 3 rotates 180 ° (see Fig. 4). During rotation of the hopper 1, the flexible pipe 16 leaves the loading neck 12. When the hopper 1 body rotates, the lid 13 under the action of the counterbalance 15 retains its vertical position. When the angle of rotation is 90 °, the lid 13 closes the neck 12 (see FIG. 3). With further rotation of the hopper 1, the cover 13 is pressed against the neck 12 under the influence of the rigid plate 14, the counter load 15 and the weight of the paddle mixture 11 (see Fig. 4). When the mixture 11 is dropped onto the rigid plate 14 of the swiveling cover 13 and the mold half 21 and the model 1 of the plate 8 are removed from the mixture 11, the gate 10 is inserted into the hopper 1, the molding sand section 11 from the cavity of the hopper 1 in which the model plate 8 with the half-form 21 is located. Then the reverse rotation through 180 ° occurs. The hopper 1 occupies the position shown in FIG. 1, after the fork 6 with the model plate 8 and the half-form 21 are lowered to the initial position, the elastic pipe enters the loading neck 12, the rotary cover 13 under the action of the counterbalance 15 occupies the vertical position, the shutter 20 opens and the hopper 1 is filled with molding sand 11. Use The proposed molding hopper of the machine for the manufacture of shell half-molds, in comparison with the known molding hoppers, eliminates the possibility of jamming in pairs of friction, working in corrosive environments, provides reliability and durability, which allows for increased machine utilization. Formula of the invention Forming of the hopper bin for the manufacture of shell half-molds, comprising a rotary bunker with a loading neck and a rotary cover and a supply tank with a shutter located above the loading neck, characterized in that, in order to simplify the design, it is equipped with an elastic pipe mounted on the flow container. the end which is located in the loading neck, and the rotatable lid is installed inside the rotary bin. Sources of information taken into account during the examination 1. USSR author's certificate 329951, cl. On 22 September 13, 2008, publ. 06/18/72. 18 figure 1 No and