RU94573U1 - PLANT FOR THE PRODUCTION OF FILLED FOAM POLYURETHANES - Google Patents

Abstract

 1. Installation for the manufacture of filled polyurethane foams, characterized in that it contains a filler dosing unit, a high-pressure filling machine and a mixing device, while the filler dosing unit contains a filler dosing device, the outlet of which is connected to the mixing device, the high-pressure filling machine includes a mixing mixing device polyurethane foam, a device for storing and dispensing the first component of polyurethane foam, a device for storing and dosed second component of polyurethane foam, the outputs of which are connected to a mixing device for preparing polyurethane foam, the output of which is connected to a mixing device. ! 2. Installation according to claim 1, characterized in that the filler dispensing unit is a screw dispenser. ! 3. Installation according to claim 1, characterized in that the mixing device is a cylindrical chamber with a rotating mixing device. ! 4. The installation according to claim 1, characterized in that the storage and dosing device of the first component is a sealed container with thermal stabilization and a metering pump. ! 5. Installation according to claim 1, characterized in that the storage and metering device of the second component is a sealed container with thermal stabilization and a metering pump.

Description

The utility model relates to a plant for producing polyurethane foams with mineral filler, which are used as shock absorbing, heat and sound insulating layers, in particular, for heat and hydro insulation of pipelines and to protect them from corrosion and environmental influences.

The prior art methods for producing filled polyurethane foams.

A known method of producing filled polyurethane foams, which are obtained by the interaction of 100 parts by weight polyol as one component with 20 parts by weight polyisocyanate component, and the polyol as one component is pre-mixed with 70-100 wt.h. crumb rubber and the resulting reaction mixture are foamed and cured at temperatures from 160 ° C to the temperature of the destruction of the components (RF patent No. 2355713, published 05.20.2009, IPC C08G 18/10 (2006.01)).

The disadvantage of this method is that only coarse non-abrasive polymer fillers are used as filler, in particular rubber, in addition, foaming occurs at elevated temperature, which complicates the manufacturing process, requires additional energy for heating. Only elastic foams can be made in this way.

Also, from the patent of the Russian Federation No. 2336283 (published on 10.10.2008, IPC C08G 18/08 (2006.01)), a method for producing fire-resistant polyurethane foam based on a composition comprising polyester polyol, polyisocyanate, expanded graphite, amine activator, blowing agent - water or freon, melamine cyanurate and glycerin, moreover, the polyether polyol, when interacting with the polyisocyanate, is pre-mixed with an amine activator, glycerin, a blowing agent and a mixture consisting of expanded graphite, melamine cyanurate and phosphogypsum - as a modifying additive when determined ratio of components.

The disadvantage of this method is that when receiving filled polyurethane foam, a large number of components and additives are used. Mineral filler (phosphogypsum) usually has high humidity (up to 50% by weight) and heterogeneous particle size distribution, therefore, in industrial production, it is necessary to additionally dry and sift the filler, which will complicate the process.

In addition, there is a known method for producing a rigid filled polyurethane foam by reacting a hydroxyl-containing component (A), an isocyanate component (B) - a polyisocyanate and an inorganic filler (C) in the presence of target additives, in which the process of mixing components (A), (B) and (C) carried out simultaneously in the mixing head of a three-component casting machine by the anti-ink method (RF patent No. 2257393, published July 27, 2005, IPC 7: C08G 18/08).

The technical result of the patented solution is the possibility of obtaining filled polyurethane foams with filler from coarse abrasive and non-abrasive materials, in particular building sand, increasing productivity, reducing the amount of production waste, improving the quality of produced materials, minimizing component losses during production, ensuring the compactness of the installation and its mobility, protection the environment.

The claimed technical result is achieved by using the installation for the manufacture of filled polyurethanes, which contains a filler dosing unit, a high-pressure filling machine and a mixing device, while the filler dosing unit contains a filler dosing device, the outlet of which is connected to the mixing device, the high-pressure filling machine includes a mixing a device for preparing polyurethane foam, a device for storing and dispensing one component of the foam liuretana, the apparatus for storing and dispensing other component polyurethane, the outputs of which are connected with the preparation of polyurethane foam mixing device, whose output is connected to the mixing device.

The uniformity and the possibility of obtaining high-quality filled polyurethane foams of the structure of the filled polyurethane foam is achieved through mixing technology - first two components of the polyurethane foam are mixed, and then filler is added to the resulting homogeneous mixture, which are then mixed in a mixing device. The mixture of the filler and the finished polyurethane foam mixture is carried out by mechanical stirring at high speed.

The increase in productivity and environmental protection is achieved through the use of a high-pressure filling machine in the installation, which is designed to prepare the components of polyurethane foam and mix them under high pressure. The machine is designed to work with two-component systems.

Through the use of an automatic installation and a mixing device for filled polyurethane foams, the finished mixture is immediately poured into molds. With this production method, a mixer (mixer) is not used, in which a large amount of foamed material remains on the walls and the mixer after pouring into molds, which, in turn, reduces the amount of waste in the production process of filled polyurethane foams.

By eliminating the “manual” dosage, minimization of component loss during production is achieved - there are no spills and spills of components, and there is no high error in the dosage of components.

Due to the ability to install and dismantle all components on a single platform mobility, as well as due to the fact that the mixing device for producing filled polyurethanes, the mixing device for producing polyurethane foams and the metering screw of the metering unit are a single unit and can be rotated 180 °, the installation is compact .

In particular, the filler dosing unit can be made in the form of a hopper connected to a screw dispenser, the mixing device can be in the form of a cylindrical chamber with a rotating mixing device, the storage device for liquid components of polyurethane foam can be sealed with thermal stabilization; devices for dispensing the liquid components of polyurethane foam - in the form of metering pumps.

Further, the utility model is illustrated with reference to the figure, which shows the technological scheme of the installation for producing filled polyurethane foams.

The installation comprises a high-pressure filling machine 1, a filler dosing unit 2, and a mixing device 3 for preparing filled polyurethane foam.

The high-pressure filling machine 1 comprises a device for storing and dispensing the first component of polyurethane foam, a device for storing and dispensing the second component of polyurethane foam, respectively 6 and 7, the outputs of which are connected to a mixing device for preparing polyurethane foam 8, the output of which is connected to a mixing device 3 for preparing filled polyurethane foam .

The filler dosing unit 2 contains a filler hopper 4 and a filler dosing device 5, the output of which is also connected to a mixing device 3 for preparing filled polyurethane foam. The filler is loaded into the hopper manually. The dosage of the filler in the mixing device 3 is controlled by changing the rotational speed of the screw of the metering device 5 and is controlled automatically depending on the set flow rate of the polyurethane foam system.

The installation works as follows. Each of the components of the polyurethane foam, in particular, component A (polyol as one composition) and component B (polyisocyanate) is loaded into its corresponding device for storing and dispensing 6 and 7 of the high-pressure filling machine 1. Loading is done manually or using submersible pumps. The devices for storing and dispensing component A and the device for storing and dispensing component B consist of a container with a water jacket and heating. The temperature in these devices is controlled by automation.

The injection of components A and B into the mixing device 8 is carried out by adjustable or unregulated axial piston pumps. Adjustment is necessary to set the required mixing ratio between the components.

The mixing of components A and B takes place in a mixing device for preparing polyurethane foam 8, where the components are fed along high-pressure hoses. In this case, the components pass through nozzles opposite each other, collide at high speed and mix.

The mixing process occurs at high pressure components (30-40 atm). Mixing occurs at the diffusion level of the component molecules, which is the key to complete mixing and good foaming.

The advantage of this installation is the quality of mixing and the corresponding material savings, metering accuracy and environmental friendliness.

Further, the mixture thus obtained enters the mixing device 3, in which it is mixed with the filler supplied from the metering unit 2.

In the mixing device 3 for the preparation of filled polyurethane foam, the final mixing of the components takes place to obtain high quality filled polyurethane foams. A filler (in particular sand) and a pre-mixed system of polyurethane foam components are simultaneously fed into the mixing chamber of a cylindrical shape with a rotating mixing device. Mixing of the filler and the system of components of the polyurethane foam occurs using a mixing device that rotates at high speed.

The advantage of this technological scheme and, accordingly, the method of producing filled polyurethane foam is the metering accuracy (due to the use of liquid metering pumps and the filler screw), the absence of filler losses (due to the use of a closed hopper and a closed screw), compactness (due to small dimensions of equipment, lack of intermediate containers for dosing and mixing).

Claims (5)

1. Installation for the manufacture of filled polyurethane foams, characterized in that it contains a filler dosing unit, a high-pressure filling machine and a mixing device, while the filler dosing unit contains a filler dosing device, the outlet of which is connected to the mixing device, the high-pressure filling machine includes a mixing mixing device polyurethane foam, a device for storing and dispensing the first component of polyurethane foam, a device for storing and dosed second component of polyurethane foam, the outputs of which are connected to a mixing device for preparing polyurethane foam, the output of which is connected to a mixing device. 2. Installation according to claim 1, characterized in that the filler dispensing unit is a screw dispenser. 3. Installation according to claim 1, characterized in that the mixing device is a cylindrical chamber with a rotating mixing device. 4. The installation according to claim 1, characterized in that the storage and dosing device of the first component is a sealed container with thermal stabilization and a metering pump. 5. Installation according to claim 1, characterized in that the storage and metering device of the second component is a sealed container with thermal stabilization and a metering pump.