RU2628392C2 - Method of manufacturing of spherical two-layer products from polyurethane - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: providing a steel mould for the inner hemisphere, consisting of a base on which a core is mounted that forms the inner surface of the inner hemisphere and a body that forms the outer surface of the inner hemisphere. In this case, a core valve for the inner hemisphere is installed in the core of the steel mould, which includes a Schrader valve made of corrosion-resistant steel. And the mortgage valve is fixed with the fingers and the bar on the body of the mould for the inner hemisphere, and the outer surface of the embedded valve is degreased and covered with an adhesive. Then, by the method of free casting, a polyurethane material is poured into the special hole of the steel mould of the inner hemisphere and an internal hemisphere is made. In the same way, a second inner hemisphere is produced, after which the finished product is removed from the mould and grinded to the desired roughness, glued together into a single inner sphere. In this case, the gluing line is cleaned mechanically, heated to the specified temperature, degreased and then applied to the polyurethane bonding line of the base material of the internal hemispheres. Further, the inner hemispheres are joined along the gluing line and finally cleaned along the gluing line. Then, to obtain a spherical two-layer article, the inner sphere is installed in a steel mould, which consists of a casing and a base. The inner sphere is fixed in a steel casting mould with the help of axes: the upper and lower, the centralizer and the bar. Then the method of free casting through the holes in the centralizer is poured polyurethane into the steel mould, then the finished product is removed from the steel mould and cleaned to the specified roughness.

EFFECT: manufacturing of products from polyurethane with the given technical characteristics.

4 dwg

Description

The invention relates to the gas, oil and chemical industries, to the field of manufacture of injection molded polyurethane products and can be used for the production of sphere-shaped products from polyurethane, such as ball pistons for pipe-piston calibration units, which provide repeated expulsion of a known volume of the measured medium from the calibrated section of the pipe-piston calibration unit ; as well as by the claimed method, it is possible to produce sphere-shaped media separators for consecutive pumping of petroleum products through a pipeline, which make it possible to separate dissimilar liquids or liquids with gas during their sequential pumping through one pipeline.

Known RF patent for the invention RU 2247026 C1, IPC B29C 39/12, F16K 15/00, B29D 31/00, B29K 105/06, B29L 31/26, priority from 05/14/2003, "A method of manufacturing a sealing sleeve" from an elastomer with filler of a greater or lesser density than the elastomer and its uneven distribution over the cuff section, including preparing a mixture consisting of elastomer and filler components, mixing the mixture, and then pouring it into a cuff mold having a working edge, while in the case of making the cuff with a filler of higher density working edge in its lower part, and in the manufacture of a cuff with a filler of lower density - in its upper part, and before pouring the mixture give exposure for a given period of time.

Known RF patent for the invention RU 2484341 C1, IPC F16K 15/00, B29C 39/00, priority from 05/17/2012, "A method of manufacturing a sealing sleeve from polyurethane", which consists in preparing a liquid mixture of polyurethane, pouring the mixture into the upper part of the mold through the input hole, forming the cuff by filling the mold and closing the mixture flows to obtain a continuous working edge of the cuff in the lower part of the mold by introducing an additional amount of the liquid mixture, then thermostating in the oven and receiving the finished product, while introducing additional itelnogo amount of the liquid mixture is carried through the outlet flows directly into the clamping zone of the mixture in an amount of not less than 0.05% of the volume of the mold.

Known RF patent for the invention RU 2210499 C2, IPC В29С 39/02, В29С 71/02, priority since 03/21/2001, "A method of manufacturing parts from injection polyurethane", including mixing and drying components, displacement with diisocyanate, pouring liquid polyurethane into molds , curing with hot air, machining, after which heat treatment of parts is carried out at 105-135 ° C for 0.5-2 hours

Known application PCT / JP2012 / 053798, IPC V29C 39/10, priority from 02.28.2011, “Transfer polymer molding device (RTM), method for transfer polymer molding and prefabricated molded product” containing a molding matrix within which the cavity is formed, an injection line the polymer and the pumping line, which are connected to the specified cavity, and the specified device is made with the possibility of placing fiber-reinforced base material inside the cavity, reducing pressure inside the cavity and injecting the polymer composition inside the cavity to impregnate the fiber-reinforced base material and the formation of the molded article.

Known application PCT / JP2014 / 080296, IPC В29С 44/00, В29К 105/04, В29К 25/00, priority from 02/03/2014 "Mold for resin and a method for producing foamed resin for injection molding", and the mold for molding the foamed resin has a silicone rubber layer used as an insulating material, and the main body of the mold is made of aluminum material.

Known RF patent for the invention RU 2515880 C2, IPC В29С 39/10, В29С 39/38, В29С 39/54, priority from July 12, 2012, "A method of manufacturing a closed hollow product from a polyurethane elastomer and a collapsible casting mold for implementing the method", when this method includes feeding the melt of the polyurethane elastomer into a mold for forming a hollow product, thermostating and cooling, and the melt is fed to a closed hermetic shell of a thermoplastic polyurethane film, inflated with gas, which becomes part of the manufactured Ia and does not require removal.

Known application PCT / GB 2012/000029, IPC B29C 39/12, priority from 01/13/2011, "Method for producing molded plastic material" having an outer shell and an inner core. It is used for the manufacture of structural materials, includes the steps of: providing a mold having a mold cavity; an outer shell of a first plastic material in at least two opposite surfaces within the mold cavity; forming an inner core of a second plastic inside the cavity of the mold; and at least partially curing the plastic to form the internal cavities of the mold using heat. This method is the closest to the claimed invention and may be a prototype.

The above technical solutions make it possible to obtain products from various polymers, given shapes and properties. However, it is not possible to produce sphere-shaped two-layer products from polyurethane.

The technical result of the claimed invention consists in creating a method for the manufacture of sphere-shaped two-layer products from polyurethane according to specified technical characteristics: dimensions, roughness, presence of valves, volume of the internal cavity, wall thickness of the sphere, material of the product.

The technical result of the method of manufacturing a sphere-shaped two-layer products from polyurethane is achieved by the fact that in a steel casting mold for the inner hemisphere, consisting of a base, on which the core is installed, which forms the inner surface of the inner hemisphere, and the body, which forms the outer surface of the inner hemisphere, while at least one plug-in valve for the inner hemisphere, which includes a Schroeder valve made of corrosion-resistant steel, while the embedded valve is fixed with fingers and straps on the body of the injection mold for the inner hemisphere; and the outer surface of the plug valve is degreased and coated with adhesive and free casting a polyurethane material is poured into a special hole in the steel casting mold of the inner hemisphere and the inner hemisphere is made and the second inner hemisphere is made in the same way, which is then depolymerized at a given temperature for a given time, after which the finished product is taken out of the mold, polished to a predetermined roughness and glued into a single inner sphere, while the Ivanov cleaned mechanical method, is heated to a predetermined temperature, degreased, followed by coating adhesive on a polyurethane base material line internal hemispheres, hemispherical more internal dock of bonding lines depolymerized at a predetermined temperature for a predetermined time and finally cleaned by contact lines. Further, to obtain a sphere-like two-layer product, the inner sphere is installed in a steel casting mold, which consists of a body and a base, and the inner sphere is fixed in a steel casting mold using the axes: upper and lower, the centralizer and the strap, and then by free casting through holes in the centralizer polyurethane is poured into a steel casting mold, then a spherical two-layer product is depolymerized at a given temperature for a specified time, after which the finished product is taken out of steel th casting mold and clean to a predetermined roughness.

In FIG. 1 shows a steel casting mold for casting the inner hemisphere.

In FIG. 1, the following notation is accepted:

1. The basis;

2. The core;

3. Case;

4. Finger;

5. Schroeder valve;

6. Flush valve;

7. Finger;

8. The bar.

In FIG. 2 shows the inner hemisphere.

In FIG. 3 shows the inner sphere after gluing.

In FIG. 3 adopted the following notation:

9. The inner hemisphere;

10. Gluing line.

In FIG. 4 depicts a steel casting mold for casting a sphere-shaped two-layer product.

In FIG. 4 adopted the following notation:

11. The basis;

12. Case;

13. The centralizer;

14. The bar;

15. A clamping level;

16. The lower axis;

17. The upper axis;

9. The inner sphere.

A method of manufacturing a sphere-shaped two-layer products from polyurethane is that in a steel casting mold for the inner hemisphere (Fig. 1), consisting of a base 1 (Fig. 1), on which a core 2 (Fig. 1) is mounted, which forms the inner surface the inner hemisphere (Fig. 2), and the housing 3 (Fig. 1), which forms the outer surface of the inner hemisphere (Fig. 2), with at least one mortgage insert being inserted into the core 2 (Fig. 1) of the steel injection mold valve 6 (Fig. 1) for the inner hemisphere, which includes Schroeder valve 5 (Fig. 1), made of corrosion-resistant steel, while the plug-in valve 6 (Fig. 1) is fixed with the fingers 4 and 7 (Fig. 1) and strap 8 (Fig. 1) on the steel cast housing forms for the inner hemisphere (Fig. 1); and the outer surface of the plug valve 6 (Fig. 1) is degreased and coated with adhesive and free casting in a special hole in the steel casting mold of the inner sphere (Fig. 1), polyurethane material is poured and the inner hemisphere is made (Fig. 1) and the second is made in the same way the inner hemisphere (Fig. 2), which depolymerizes at a given temperature for a predetermined time, after which the finished inner hemispheres (Fig. 2) are removed from the steel mold for the inner hemisphere (Fig. 1) and ground to this roughness, glued into a single internal sphere (Fig. 3), while the gluing line 10 (Fig. 3) is peeled off mechanically, heated to a predetermined temperature, degreased, followed by applying to the gluing line 10 (Fig. 3) the polyurethane core material internal hemispheres, then the inner hemispheres are joined along the gluing line, depolymerized at a given temperature for a given time and finally cleaned along the gluing line. Further, to obtain a sphere-like two-layer product, the inner sphere (Fig. 2) is installed in a steel casting mold (Fig. 4), which consists of a housing 12 (Fig. 4) and a base 11 (Fig. 4), and the inner sphere (Fig. 3) ) are fixed in a steel casting form (Fig. 4) using the axes 16 and 17 (Fig. 4), a centralizer 13 (Fig. 4) and a strap 14 (Fig. 4), after which the method of free casting through holes in the centralizer 13 ( Fig. 4) pour polyurethane into a steel casting mold (Fig. 4), then a sphere-shaped two-layer product is depolymerized at a given temperature for a predetermined time, after which the finished product is removed from the steel casting mold and cleaned to a predetermined roughness.

A method of manufacturing a sphere-shaped two-layer products from polyurethane is suitable for the manufacture of ball pistons for tube-piston calibration units, providing repeated displacement of a known volume of the measured medium from the calibrated section of the tube-piston calibration unit; as well as by the claimed method, it is possible to produce sphere-shaped media separators for consecutive pumping of petroleum products through a pipeline, which make it possible to separate dissimilar liquids or liquids with gas during their sequential pumping through one pipeline. The claimed method allows to manufacture a sphere-like two-layer product according to specified technical characteristics: dimensions, roughness, presence of valves, volume of the internal cavity, wall thickness of the sphere, material of the product.

Claims (1)

A method of manufacturing a sphere-shaped two-layer products of polyurethane, which provide a steel injection mold for the inner hemisphere, consisting of a base on which to install a core that forms the inner surface of the inner hemisphere, and a housing that forms the outer surface of the inner hemisphere, while the core is steel cast at least one plug-in valve for the inner hemisphere, which includes a Schroeder valve made of a corrosion-resistant with ali, in this case, the plug-in valve is fixed with fingers and straps on the body of the injection mold for the inner hemisphere, and the outer surface of the plug-in valve is degreased and coated with adhesive, then polyurethane material is poured into the hole of the steel injection mold of the inner hemisphere and the inner hemisphere is made and so the second inner hemisphere is made in the same way, after which the finished product is taken out of the mold and polished to a given roughness, glued into a single inner sphere, the gluing line is mechanically cleaned, heated to a predetermined temperature, degreased, followed by applying the main material of the hemispheres to the polyurethane gluing line, then the inner hemispheres are joined along the gluing line and finally cleaned along the gluing line, then to obtain a sphere-like two-layer product the sphere is installed in a steel mold, which consists of a body and a base, and the inner sphere is fixed in a steel mold using and the axes: the upper and lower, the centralizer and the strap, after which the method of free casting through the holes in the centralizer pour polyurethane into a steel casting mold, after which the finished product is taken out of the steel casting mold and cleaned to a predetermined roughness.

Images