RU187826U1 - CENTRIFUGE FOR DRYING CONTACT DETAILS OF REEDS - Google Patents

Abstract

The invention relates to drying centrifuges designed to remove moisture from the surface of small parts in the field of centrifugal forces, and can be used, in particular, for drying contact parts of reed switches. A centrifuge for drying contact parts of reed switches contains a rotor made in the form of a disk, on the periphery of which, with the help of fixed supports parallel to the axis of rotation of the rotor, holders with contact parts are installed, while the holders consist of two parallel flat gratings parallel to Holes and bases, the planes of the holder elements are perpendicular to the radii of the disk, the holes of the grids are facing the axis of rotation of the centrifuge, and four supports are adjacent to the central part of the base of each holder. The technical effect of using the proposed technical solution is due to an increase in the service life of the holders and the quality of galvanic coatings of contact parts reed switches.

Description

The utility model relates to drying centrifuges designed to remove moisture from the surface of small parts in the field of centrifugal forces, and can be used, in particular, for drying contact parts of sealed magnetically controlled contacts (reed switches).

The accumulation of moisture on the surface of the contact parts of the reed switches occurs during the application of galvanic coatings on them. To ensure simultaneous galvanic processing of an array of 1000-2000 contact parts, special pendants are used, which consist of three main elements: a holder into which contact parts are loaded; magnetic system, fixing parts in the holder, and electrodes connected to a power source.

A centrifuge is known from the prior art, consisting of a housing with a lid and a perforated drum rotating by means of an electric motor, on the basis of which the workpieces are fixed using holders [S. S. Vinogradov. Organization of galvanic production. Equipment, production calculation, rationing. / Edited by V.N. Kudryavtseva. - Moscow: Globus - 2005 - S.85-86], as well as a centrifuge containing a rotor, on the basis of which there are cassettes with machined parts [SU 1101306, B04B 5/00, publ. 07/07/84].

The disadvantage of these technical solutions is that they do not take into account the particularities of fastening the holders of contact parts based on the rotor, which determine the drying efficiency and the life of the suspensions.

The closest to the claimed technical solution is a centrifuge designed for drying parts, containing a rotor made in the form of a disk, on the periphery of which, using fixed supports parallel to the axis of rotation of the rotor, holders with parts are installed [SU 426711, V04V 5/12, F26V 11/08, publ. 05/05/74].

The disadvantage of this technical solution is that when the rotor rotates under the action of centrifugal forces with improper arrangement of the supports relative to the holders, their flat elements may be bent. This effect is cumulative in nature and negatively affects the quality of the resulting galvanic coatings formed on the surface of contact parts due to the increased distance between them and the magnetic suspension system.

The task to which the claimed technical solution is directed is to increase the service life of suspension holders processed in centrifuges.

This problem is solved due to the fact that in the centrifuge for drying the contact parts of the reed switches containing the rotor, made in the form of a disk, on the periphery of which with the help of fixed supports located parallel to the axis of rotation of the rotor, holders with contact parts are installed, while the holders consist of parallel two flat lattices with coaxial holes and a base, the planes of the holder elements are perpendicular to the radii of the disk, the holes of the lattices are facing the axis of rotation of the centrifuge, and to the central part of the Each holder is adjoined by four legs.

The technical result of the utility model is to maintain the original shape of the structural elements of the suspension holders during the drying of contact parts in a centrifuge, and as a result, to increase the service life of the suspension holders and the quality of the galvanic coatings formed on the surface of the contact parts.

The invention is illustrated by drawings, where in FIG. 1 depicts a suspension structure used for plating contact contacts of reed switches; FIG. 2 is a plan view of a centrifuge, and FIG. 3 (a, b) - two versions of the fixed fixation of the suspension holders with the help of supports.

The suspension (Fig. 1) consists of a magnetic system 1, a base 2 with protrusions 3, intended for fixing the magnetic system, grids 4 and 5, in which the contact parts 6 are placed.

The centrifuge used for drying the contact parts (Fig. 2) contains a housing 7, as well as a rotor, consisting of a disk 8 and perforated walls 9. Suspension holders 11 with contact parts 6 are mounted on the disk using vertical supports 10 (Fig. 1) facing the center of the centrifuge.

Two options for the location of the supports relative to the holder of the suspensions are possible: the supports are adjacent to the protrusions of the base of the holder (Fig. 3, a), the supports are adjacent to the central part of the holder without touching its protrusions (Fig. 3, b).

The centrifuge operates as follows.

The contact details of the reed switches are loaded into the holes of the holder grids (Fig. 1) and are attracted by the ends of the magnetic field to the inner surface of the base. Then the contact parts are immersed in the electrolyte to the required depth, and a negative potential is brought to the suspension from the power source. As a result, the required galvanic coatings are formed on the surface of the contact parts.

After coating, the contact parts are washed in deionized water, the magnetic systems are removed from the suspensions, and the holders are placed in a centrifuge and fixedly mounted with vertically arranged supports 10 (Fig. 2). After that, the rotor is brought into rotation about the axis of AO (Fig. 3) and the water is removed from the surface of the contact parts under the action of centrifugal force.

For uniform removal of water from all contact parts, it is necessary to arrange the holders perpendicular to the radii of the centrifuge rotor (Fig. 2).

If the supports are pressed against the protrusions of the base of the holder (3 in Fig. 3, a), then under the action of centrifugal forces there is a curvature of the surface of the gratings and the base. To avoid curvature of the surface of the elements of the holders of the support should be in contact only with the Central part of their base (Fig. 3, b).

Various options for the structural design of the supports are possible: supports with a round, square and elliptical cross-section, etc. However, in all cases, the contact boundaries of the supports with the base of the holders must be strictly in the same plane.

The proposed device (Fig. 3, b) ensures the safety of the original form of the elements of the holders of the contact parts of the reed switches during drying in a centrifuge. This allows to increase the service life of the holders and to improve the quality of galvanic coatings of contact parts.

Claims (1)

A centrifuge for drying the contact parts of the reed switches, containing a rotor made in the form of a disk, on the periphery of which with the help of fixed supports parallel to the axis of rotation of the rotor, holders with contact parts are installed, characterized in that the holders consist of two parallel flat gratings with coaxial holes and bases, the planes of the holder elements are perpendicular to the radii of the disk, the holes of the grids are facing the axis of rotation of the centrifuge, and to the central part of the base of each holder I adjoin four legs.

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