RU1803935C - Device for metal casting dozing - Google Patents

Abstract

SUMMARY OF THE INVENTION SUBSTANCE: device for subsidized metal casting for sealing photoelectronic devices comprises a liquid metal container, a metering element in the form of a plunger with a metering cavity, made in the form of an annular groove on the outer side surface of the plunger. The plunger is placed with the possibility of movement inside a vertical channel, in the wall of which a hole is made and provided with a spring-loaded insert with a conical chamfer. The lower part of the vertical channel is provided with a socket for connection with the device assembly. 2 ill.

Description

The invention relates to electronic equipment and can be used in the technology of manufacturing electric vacuum devices (EVP), in particular, photoelectronic devices (PECs) by vacuum transfer. The transfer method is a method of manufacturing an EEC, in which the manufacture and processing of individual parts of the device is carried out separately in space and / or in time, after which they are assembled in vacuum followed by sealing of the device.

The aim of the invention is to increase the uniformity of the distribution of the sealing metal and the accuracy of the dosage.

In FIG. 1 presents the proposed device for metered metal casting.

In FIG. 2 shows the same device during the casting process.

The device (Fig. 1) contains a container 1 made in the form of a torus, in the central channel of which a plunger 2 is located, and a stroke limiter of the plunger 3, an annular groove 4-metering cavity is made on the outer surface of the plunger, which can be connected to the tank 1 through opening 5 in the wall 6 of the vessel, the outlet 7 for the sealing material is made in the lower part of the channel and has a socket 8, the distance between the opening of the channel wall and the conical extension not less than the width of the plunger groove. The plunger is equipped with a liner 9 with a conical chamfer 10. The tank 1 can be made separately from the vertical channel, and its lower part is connected to the hole of the channel wall by means of a tube.

The proposed device operates as follows (figure 2). A device for pouring sealing material and a housing 11 of the device with an annular groove 12 are placed in the vacuum chamber. The container 1 is filled with sealing material, for example, indium. After completion of the preparatory operations (pumping, heating, degassing), the plunger 2 moves up to the stop 3 and the molten indium through the hole 5 fills the groove 4

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the principle of communicating vessels. Since the sealing material is taken from the bottom of the container 1, the melt in the annular groove 4 will be free from slag and oxides collected on the surface of the melt, the body of the device 11 is moved coaxially to the casting device. Next, the casting device is moved down, and the position of the body of the device 11 is fixed by the conical chamfer 10 of the liner 9. The spring 13 ensures a snug fit of the chamfer 10 to the edge of the groove 12. The limiter 3 restricts the plunger from shifting relative to the hole 5 when the liner moves 9. Further movement of the casting device occurs until the housing 11 is in contact with the bell 8. Then the plunger 2 is moved from the upper to the lower position - until the plunger 2 is in contact with the liner 9. In this case, from the grooves 4 vylets sealing material into the annular groove 12 of the device 11.

The proposed device was used to seal assemblies of photoelectronic devices with a groove diameter of 30-50 mm. The diameter of the plunger was 40-50 mm, the width of the annular groove of the plunger was 4-5 mm, the depth of the groove was 4-6 mm. The distance from the bottom of the channel opening was 4-12 mm, but greater than or equal to the width of the groove. If the indicated distance is less than the width of the groove, then the device will not be operable, because the melt is poured out of the tank when the plunger moves down.

The axial section groove of the plunger can be semicircular, rectangular or trapezoidal. The distribution of the sealing material in the groove of the device when using this device is characterized by a more uniform distribution of the sealing material and a more accurate dosage.

than when using the prototype device. Checking the composition of the sealing material showed the absence of slag and scale that occurs when using the method according to the analogue.

The proposed device allows you to dock and fix the device and the nodes of the devices and, thereby, increase the uniformity of distribution

sealing material and therefore

suitable devices output.

The technical and economic advantages of the proposed device are determined by increasing the uniformity of the distribution of the sealing material in the groove of the device, as well as by increasing the dosage accuracy. These advantages, as well as the provision of alignment and docking of the device nodes of the claimed device, leads to an increase in the yield of suitable nodes and devices.

Claims (1)

SUMMARY OF THE INVENTION Dosed Casting Device metal, mainly for sealing assemblies of photoelectronic devices, containing a container for liquid metal, a metering element in the form of a plunger with a metering cavity, placed with the ability to move inside a vertical channel, in the wall of which a hole is made with the possibility of connection with the metering cavity, characterized in that, in order to increase uniform distribution of the sealing material and metering accuracy, the metering cavity is made in the form of an annular groove on the outer side surface of the plunger, equipped with coaxial a spring-loaded liner with a conical chamfer, the lower part of the vertical channel is provided with a bell, made with the possibility of connection with the node of the device.