RU1836175C - Facility for regenerating used moulds and cores mixtures - Google Patents

Description

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i The invention relates to foundry production and is intended for the regeneration of spent molding and stainless steel mixtures.

 The aim of the invention is to expand technological capabilities and improve the quality of the mixture,

j The goal is achieved in that: y: the regeneration apparatus for spent molding and core mixtures contains a loading and unloading funnel, a working chamber with annular ribs on its inner side surface, a drive shaft with a bearing assembly and a rotor fixed to the lower end of the shaft placed in the working chamber and having a bottom on the end of the blade.

 Inside the working chamber, a screen is made coaxially with the roto mounted, made with vertical chip holes, formed by being fixed on the ring

vertical plates located relative to each other with gaps and tangent to the side surface of the rotor, about

Figure 1 shows the device, a General view; figure 2 is a section along aa of figure 1.

A device for regenerating spent molding and core mixtures comprises a cylindrical working chamber 1 mounted on a sheet 2, for example, a hopper cover, a bearing assembly 3 with a support flange 4 in its upper part and a drive shaft 5, and a screen b placed inside the chamber 1.

The bearing assembly 3 is mounted on elastic bearings 7 with the possibility of oscillatory movements of the drive shaft 5 in a vertical plane. At the upper end of the shaft 5 there is a V-belt drive pulley 8, the protection of which against the ingress of the regenerated mixture 9 is ensured by

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ear 10. At the lower end of the shaft 5, a cylindrical rotor 11 is fixed, the upper rim of which is located above the bottom of the working chamber 1. On the inner surface of the working chamber 1, horizontal annular ribs 12 are installed along its periphery, and blades 13 are attached to the lower part of the end of the rotor 11.

The screen 6 / is made in the form of plates 14, mounted vertically, with a gap (not more than 10 mm) relative to each other tangentially to the inner (throwing) edge of the rotor. A 11. The plates 14 are rigidly mounted on the ring 15. The screen 6 is suspended on the rods 16 made with thread and fixed with nuts 17 on sheet 2. In this case, the screen 6 is mounted coaxially with the rotor 11, and its lower edge is located below the level of the upper edge of the rotor

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A loading funnel 17 and a nozzle 18c with a slide gate 19 are installed in the upper part of the chamber 1. A loading funnel 20 and a funnel 21 are attached to the bottom of the chamber 1 for large fractions and crushed inclusions.

The device operates as follows.

The mixture 9 entering the loading funnel 17 enters the rotating rotor 11 and is thrown uniformly in all directions along the tangent to the throwing edge of the rotor 11. In this case, the fine fraction (with a size less than the gap between the plates 14) passes through the openings of the screen 6 and enters the side surface of the working chamber 1. The space between the ribs 12 is filled with the mixture during operation of the device, as a result of which the particles of the mixture interact effectively with each other and impurities are rubbed off, followed by the removal of dust fractions into the ventilation system through the nozzle 18. The mixture is unloaded through the discharge funnel 20.

Particles of a mixture larger than the gap between the plates 14 hit the screen 6 and crushed. In this case, the milled particles smaller than the gap between the plates 14 pass through the openings of the screen 6 and fall on the lateral surface of the working chamber 1. and then into the discharge funnel 20.

The small fractions of the mixture reflected from the screen 6 fall into the gap between the rotor

11 and the screen 6 and the air flow generated by the blades 13 are carried out to the side surface of the chamber 1.

Non-milled particles larger than the gap between the plates 14 and non-crushed

inclusions (for example, scrap, reinforcement, etc.), reflected from the screen, fall into the funnel for large fractions and impenetrable inclusions 21. The proposed device allows

ensure the whole range of operations for preparing the working mixture, namely, crushing clods, separation of large fractions and non-crushed inclusions, controlled removal of the deactivating clay component from the mixture, cooling and aeration of the mixture. Moreover, the mixture after processing on this device has a higher quality. The small dimensions of the device allow

integrate it practically with all the systems for preparing the processed mixture of operating foundries.

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Claims (2)

1. A device for the regeneration of spent molding and core mixtures, comprising loading and unloading funnels, a working chamber with annular ribs on its inner side surface, a drive shaft with a bearing assembly. and with a rotor fixed at its lower end, located in the working chamber and having a blade at the bottom end, characterized in that, with the aim of expanding technological capabilities and improve the quality of the mixture, it is equipped with a screen mounted inside the working chamber, coaxially with the rotor, and made with a vertical--. steel slotted holes 2. The device according to claim 1, the clause being that the screen is filled in the form of vertical plates fixed to the ring, arranged relative to each other with gaps forming slotted holes, and tangent to the side surface of the rotor . M 9Z.L9Јtit Aa /4 Vbr 2 12