SU1217934A1 - Drum for working small articles - Google Patents

Description

The invention relates to the treatment of small products in the drums of the submersible type, and more specifically to devices for applying electroplated coatings to small products. and can also be used for washing and drying small items.

The aim of the invention is to increase productivity.

FIG. 1 shows a drum, a general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 shows the node I in FIG. one.

The drum for processing small products contains a multi-faceted chamber 1 with perforated edges 2 and with a lid 3 for loading products 4 of the plate 5 fixed along the ribs. the side and walls of the end faces inside the multifaceted chamber 1, which overlap the perforated faces 2 and are equipped with cathode-contact belts 6, which are supplied with current through a system of sliding contacts by methods known in electroplating.

The perforations on the gran x 2 are designed in such a way that, starting from the ribs to which the shelves are fastened, the first

n

rows of holes 7 have the largest

diameter d, significantly exceeding the minimum recommended diameter of 3 mm.

Each subsequent row of holes 7, which may be n, where n 1, is made with a smaller diameter than the previous one, and the last row of holes 8 has 2-3 mm.

The magnitude of the diameters d ,, - d of holes along the rows depends on the angle of the shelves to the side faces of the drum, the thickness of the faces, the minimum length of the products and is determined by tracing the position of the product A in the space between face 2 and shelf 5 (see Fig. 3) .

When a needle enters the specified space, due to the forced tilting of the shelf 5 with its lower end, it must abut its wall in any hole, not falling out, and when turning the drum it is free to slide to the next shelf. In addition, the flow of electrolyte flow passes through,

15

2179342

It also prevents the penetration of the needles into the space of Nfem through edges and shelves. 5 In order to ensure complete drainage of the electrolyte when removing the drum from the bath after the last row of holes 7 in each face 2 of the drum, inserts 8 with narrow (up to 0.2 mm) slots are installed.

The drum operation is performed as follows.

Through the cover 3, products, for example, sewing needles for manual sewing, are loaded into a multi-faceted chamber. Close the door and lower the drum into the electrolyte bath (not shown) ,.

The process of electroplating on the products is carried out with the rotation of the drum without reversal in the direction indicated in FIG. 2, while the products slide along the plates 5, touching the cathode contact strips 6.

Due to the large length of the side edges of the drum (the drum has an axis and facing the anodes with the side edges) and pouring the needles from the shelf to the shelf, the needles are placed on the shelves in a relatively thin layer and the probability of their lumping during processing is significantly reduced.

20

25

thirty

When unloading the products, the drum is removed from the bath, the Kryshka 5 is opened, and since the inclined plate is absent in the face where the lid is located, the products freely pour out of the chamber 1 when the drum is turned.

U Completely eliminating the precipitation of products like sewing needles for manual sewing from the drum, their clumping during processing, reducing the electrical resistance to the passage of direct current and improving the exchange of electrolyte in the drum by making perforations of a large diameter make it possible to process small items like sewing needles for manual stitching with high performance and quality electroplated coatings.

.Z

Editor L. Veselovska

Compiled by I. Saakova Tehred J. Kastelevich

Order t086 / 34 Circulation 615 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5

Branch PPP Patent, Uzhgorod, st. Project, 4

Corrector; A..0 Bruchar

Claims (1)

A DRUM FOR PROCESSING SMALL PRODUCTS such as sewing needles, containing a multifaceted working chamber with perforated walls and a cathode-contact device, characterized in that, in order to increase productivity, it is equipped with shelves fixed inside the working chamber with the possibility of overlapping side faces, moreover, the shelves form with there are sharp corners by the lateral faces in the direction of rotation of the drum, and the diameter of the perforation holes in the lateral faces decreases with distance from the edges of the connection between the shelves and the faces.