DE1926900U - DEVICE FOR THE CONTINUOUS MANUFACTURING OF RESIN FOAM. - Google Patents

Description

P.A. 471 525-8.9.bi

BADISCHE ANILIN- & SOM-PABRIK AG

our reference GM 579 Sa / Ia

Ludwigshafen am Rhein, September 7, 1965

Device for the continuous production of Kunstharz ™

Foams

Devices for the continuous production of synthetic resin shawls from solutions of curable synthetic resins, e.g. urea-formaldehyde condensates, by mixing the synthetic resin solution with a foamed foam solution and hardening the synthetic resin foam are known.

A common apparatus consists e.g. of a closed one on one side Mixing tank, one with a hardener for the Foam solution mixed with synthetic resin is injected using a pressurized gas and converted into a foam by vigorous stirring can be »This foam is approached at one of the container exit Place the synthetic resin solution supplied »

Modifications of this device are, for example, with two separate stirring vessels equipped, in the first from the foam mitirell solution and air the foam can be generated and the synthetic resin solution is added to this in a second container » 328/65

- 2 -

- 2 - GM 579

These devices require larger ones, especially when using them Amounts of foams are to be produced in a short time, a relatively large amount of space, since with these devices in of the hour a maximum of 50 times the contents of the mixing vessel or Mixing vessel part in which foam and synthetic resin solution are mixed, can be produced on foam «

Furthermore, devices have become known in which foam concentrate solution and resin solution can be atomized separately with pressurized gases, and then these atomization products are brought together can be »

In another embodiment of these devices is a with Foaming room filled with glass balls is available, into which the Foam concentrate solution can be dusted «, The resin solution is then added to the foam produced in this way in a downstream mixing chamber sprayed.

With such devices to be produced foam volumes are small Generally, these devices are designed for the production of 1-10 OBM foam in the hour "Perner, it is difficult to produce with such devices completely homogeneous foams as it is for some applications, z _o B _e at high compression of the foam is required "

The present invention is a particularly advantageous one Device of the type mentioned, it consists of a tubular vessel (1) (see attached drawings) for ready

- 3 - GM 579 //

processing of the foam from the foam concentrate solution, on the inlet side of which a feed (2) for pressurized gas and a feed (3) for Foam solution are attached and at its reduced in diameter On the output side there is a .Pipe (4) which is connected to a Feed for the synthetic resin solution (5) is equipped in the foam and opens into a stirred vessel (6) which has a nozzle (7) is provided for removing the foam from the direction of the door.

The following is the door direction according to the invention and its mode of operation explained in more detail «

The feeds for foam concentrate solution and pressurized gas (2 and 3, Fig. 1) on the vessel (i) can be designed as a nozzle with which the foam concentrate solution, optionally containing the hardener for the synthetic resin, can be dusted into the vessel (1). In dieaem IaILe. it is advantageous if the vessel (1) contains porcelain balls, turf rings or wire nets. However, it is also possible (see FIG. 2) to generate an underdrawn zone in the vicinity of the axis of the vessel (1) by means of the vessel (1) at (2) tangentially supplied compressed gas. The aehsial supplied into this zone through the feed line (3), eg ₀ metered with a pump, if appropriate, the hardener for the resin solution containing the foaming agent solution is then detected by the circularly flowing along the walls of the vessel gas and due to the tangential by the difference loan and Axial flow velocities of the components caused eddy formation converted into a coarse foam.

GM 579

Brought baffles or the like, the rotational movement of the coarse foam and largely in an axial movement converted. In this case it has the downstream of the vessel (1) Pipe (4) expediently a multiple (up to 2Ofold) the Length of the vessel (1), because in this tube the coarse charm in one fine-pored foam is transformed. If necessary, the tube can be laid in turns around the stirring vessel (6), whereby a particularly space-saving arrangement is achieved.

The pipe (4) is - if it is at the same time to transfer the coarse Foam is used in a fine-pored foam, only after the pipe section required for this - with a feed (S) for the synthetic resin solution fitted in the foam. This feed can be used as a finely perforated distribution nozzle, or as an atomizing nozzle, through which the synthetic resin solution, optionally with the use of a gas, can be dusted into the foam. kauris., be trained. the Mixture of foam and resin solution is then added to the mixing vessel (6) supplied. The number of revolutions of the agitator (8) is usually between 600 and 700 revolutions per minute. It can, however, if particularly fine-pored foams are desired or the dimensions of the stirring vessel should be chosen to be particularly small, up to 1000 revolutions minutes. The stirring vessel can be arranged upright or lying down. The finished foam can by means of a nozzle attached to the mixing vessel discharged and optionally supplied to its use with the help of a hose attached to this nozzle.

With a device of this kind, 500 to 1000 times the contents of the mixing vessel of foams per hour can easily be achieved.

- 5 - GM

be procreated. The foams are completely homogeneous and as a result its fine structure is very elastic the amount of raw material and air added and the speed of rotation of the agitator can be varied within wide limits.

- 6

Claims (1)

Claim to protection Device for the production of synthetic resin foams from solutions of curable synthetic resins by mixing a foam from a foam solution foamed with a compressed gas with a synthetic resin solution and hardening the resulting synthetic foam, characterized by a tubular vessel for preparing the foam from the foam solution, on the inlet side of which there is a feed for compressed gas and a feed for foam solution are attached and on the output side reduced in diameter see a ΚσΪΕΓ, which is equipped with a feed for the synthetic resin solution in the foam and opens into a mixing vessel which is provided with a pipe socket for removing the foam from the device . BADISOHE AIILII- & SODA-IABRIK AG Sign.