SU825331A1 - Apparatus for making tubular articles from latex resin - Google Patents

Description

The invention relates to the manufacture of rubber products and can be used, for example, in the manufacture of tubular products made of latex by the method of extrusion. A device for the manufacture of tubular latex articles is known, comprising two vertically mounted concentric tubes that form an annular forming channel in such a device, forming pipes are made of glass. The disadvantage of this device is the difficulty in treating the glass tubes and achieving the concentricity of the two tubes in length, which leads to a significant thickness variation, of latex tubes. The closest in technical essence and the achieved result is a device for the manufacture of tubular products made of latex, containing two concentrically arranged tubes, connected to a latex container with an annular shape, with one of the tubes made of metal. In such a device, the outer tube is made of glass, and the inner tube is made of metal. However, in the known device, the process of manufacturing tubes, especially with tight tolerances on the dimensions of the product, is also quite laborious and does not achieve the concentricity of two tubes in length, which reduces the quality of the items due to their thickness variation in length. The purpose of the invention is to improve the quality of products. This goal is achieved in that the device contains two concentrically arranged tubes that form an annular forming channel connected to the latex container, one of which is made of metal, the other is also made of metal, and the surfaces of both tubes are coated with fluorotne varnish. The drawing shows the device, a General view in section. The device comprises a housing 1 with a chamber A for a latex mixture and a chamber B for a heat transfer medium, between which a heat insulating partition 2 is installed. In case 1

concentric tubes 3 and 4 are mounted, forming an annular forming channel a connected through chamber A to a container (not shown) for latex. Tubes 3 and 4 are made of metal, for example, of: :: hoists, with the shape of the tube facing the channel a, covered with a film of fluorinated varnish 5, such as LFE42H, FBF74D or LFE42G

The device works as follows.

Coolant, for example hot water, is supplied to chamber B, heating tube 4 to the latex mixture coagulation temperature.

B, chamber A is supplied under a certain pressure by the latex mixture, which is forced through the forming channel a. Heat is transferred from the tube 4 through the films 5 to the latex mixture, causing it to coagulate.

The manufacture of tubes 3 and 4 from steel makes it possible to make them along the diameter with almost high accuracy, to install them in a strictly concentrically known way, and thus Scua modulated g mpySKu

get a latex tube with the same wall thickness.

Claims (2)

An apparatus for manufacturing latex tubular products comprising two concentrically arranged tubes, an annular shaped channel connected to a latex container, one of which is made of metal, characterized in that, in order to improve the quality of the products, the other tube is also made metal, and the forming surfaces of both tubes are coated with fluorinated varnish.  Sources of information taken into account during the examination l.Revan A.R. Pi odluctibn about luting tv Eortesu extrusion process.-Mafiavan cut-ber BoardJ. Ma-bOK-qP vu-bljer Procluce -s reseai cli assoiiation.Ref .TAS 21/68, ig juEi.oea 1 BD 45. 2. USSR author's certificate in application 2498356 / 23-05, .kl. In 29 N 3/02, 1977 (prototype). / gateksna mixture from tank