SU996067A1

SU996067A1 - Sand slinging head

Info

Publication number: SU996067A1
Application number: SU813315908A
Authority: SU
Inventors: Борис Николаевич Симченко
Original assignee: Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения
Priority date: 1981-07-14
Filing date: 1981-07-14
Publication date: 1983-02-15

Description

(5) ПЕСКОМЕТНАЯ ГОЛОВКА(5) SANDING HEAD

- - .1 . . Изобретение относитс к литейному производству и может быть использовано дл набивки литейных форм и стержней. - - .one . . The invention relates to foundry and can be used for stuffing casting molds and cores.

Известна пескометна головка, содержаща кожух с окнами дл загрузки и выброса смеси, приводной полый ротор, поверхностькоторого выполнена в биде замкнутого желоба, и устройство прижима уплотнительной смеси к желобу LI.The known sandblasting head comprising a casing with openings for loading and ejecting the mixture, a drive hollow rotor, the surface of which is made in a bidet of a closed trough, and a device for pressing the sealing mixture to the trough LI.

Недостатком известного устройства вл етс низкое качество уплотнени смеси.A disadvantage of the known device is the low quality of the mixture compaction.

Наиболее близкой к изобретению вл етс пескометна головка, содержаща кожух с окнами, дл разгрузки и выброса смеси, приводной полый ротор, поверхность которого выполнена в виде замкнутого желоба, и устройство прижима смеси к желобу 2.Closest to the invention is a sand-head, comprising a housing with windows, for unloading and ejecting a mixture, a drive hollow rotor, the surface of which is made in the form of a closed trench, and a device for pressing the mixture to trench 2.

Недостатком известного устройства вл етс недостаточна долговечность его узлов из-за интенсивного абразивного износа.A disadvantage of the known device is the lack of durability of its components due to intense abrasive wear.

Цель изобретени - повышение долговечности узлов пескометной головки .The purpose of the invention is to increase the durability of the sand-head units.

Поставленна цель достигаетс тем, что в пескометной головке, содержащей кожух с окнами дл разгрузки и выброса смеси, приводной полый ротор,The goal is achieved by the fact that, in a sandblasting head containing a casing with windows for unloading and ejecting a mixture, the drive hollow rotor

,Q поверхность которого выполнена в виде замкнутого желоба, и устройство прижима смеси к желобу, устройство прижима смеси к желобу выполнено в виде соединенной с полостью ротора, Q whose surface is made in the form of a closed chute, and the device for pressing the mixture to the chute, the device for pressing the mixture to the chute is made in the form of a rotor connected to the cavity

,5 вакуумной системы, при этом желоб выполнен газопроницаемым, а на кожухе против участка разгона смеси выполнены дополнительные окна дл забора воздуха., 5 of the vacuum system, while the trough is made gas-permeable, and additional windows for air intake are made on the casing against the acceleration section of the mixture.

20 На фиг. 1 изображена пескометна головка, вид сбоку, разрез; на фиг. 2 - разрез А-А на фиг. 1.20 In FIG. 1 shows a sand-head, side view, cut; in fig. 2 shows section A-A in FIG. one.

Claims

The sandblast head contains a casing 1 with windows 2 and 3 for loading and evacuating the mixture k fixed on the drive shaft 5 | A hollow rotor 6, the surface of which is made in the form of a closed gas-permeable trough 7 of porous material, for example, from a mesh. The mesh size is chosen to be smaller than the size of the grains of sand. . In the cavity of the rotor 6 under the chute 7 is arcuate gate 8, made of gas-permeable material. At the same time, its gas permeability should be less than the gas permeability of the chute 7. In addition, in the casing 1 there are windows 9 for taking air from the atmosphere, located opposite the acceleration section by mixing with a rotor 6, the cavity of which is communicated with a vacuum system (not shown) through the pipe 10. The sand head works as follows. The rotor 6 is driven by the shaft 5, and is in communication with the vacuum source. Through the loading window 2, the molding mixture 4 is fed to the chute 7, which is pressed to its surface by air entering the head through the openings 9 of the casing 1. Air is sucked in by a vacuum source through the nozzle 10. The mixture is held on the surface of the rotor 6 by air filtration and transported by rotor to place of release. Ejection of the mixture k is carried out by overlapping the gas-permeable surface of the rotor 6 by a less gas-permeable gate. The gas permeability of the rotor surface and, consequently, the forces of air filtration, the compressors, the mixture sharply decreases, and the mixture k under the action of centrifugal forces is thrown into the tooling. At the same time, a thin layer of mixture A remains on the gas-permeable surface of the rotor, protecting the surface of the rotor 6 from abrasion. Due to this, the durability of the sand-head is increased. An inventive sandblasting head comprising a casing with openings for loading and ejecting a mixture, a drive hollow rotor, the surface of which is made in the form of a closed trough, and a device for pressing the mixture to the trough, so that the durability of the sand-jet head units, the device for pressing the mixture to the chute is made in the form of a vacuum system connected to the rotor cavity, while the chute is made gas-permeable, and additional air intake windows are made on the casing against the acceleration section of the mixture. Sources of information taken into account in the examination 1. German Patent №, cl. 31b, 15/20, 1923.

2. USSR author's certificate If $ 2671, cl. B 22 C 15/20, 1978.

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FIG. 2