FR3110869A1 - MIXING HEAD UNIT WITH HIGH MIXING EFFICIENCY - Google Patents

Abstract

The invention relates to a mixing head unit (10) having high mixing efficiency, which is capable of producing a molded foam which requires high impact resistance and high performance. high durability, by making a primary mixture of polyols and isocyanates in a raw material supply unit (30) and by performing a secondary mixing of the powder supplied through a powder supply unit (40). In the present invention, when polyols and isocyanates supplied from the raw material supply unit (30) and a powder supplied from the powder supply unit (40) are mixed and supplied to a reaction chamber (21) of a mixing head body (20), the mixture can be supplied by a mixing element (50) having a rotating body (51) which is formed to be tilted up and down. Figure to be published with the abstract: Figure 3

Description

MIXING HEAD UNIT WITH HIGH MIXING EFFICIENCY

The present invention relates to a mixing head unit having high mixing efficiency, and more particularly, to a mixing head unit having high mixing efficiency, which is capable of producing molded foam which requires high resistance to impact and high durability, by making a primary blend of polyols and isocyanates in a raw material feed unit and by making a secondary blend of the powder supplied through a powder feed unit.

A mixing head is a device that sprays two or more kinds of raw materials through a high pressure nozzle and mixes them by collision. It is widely used in the manufacture of polyurethane foam products, and polyols and isocyanates are mixed by spraying under high pressure, and then the mixed materials are injected into a mold.

Since it is necessary for the raw materials mixed inside the mixing head to form a good mixed state in a short section until discharged, many attempts have been made to improve the mixing efficiency by forming a separate swirl chamber, in addition to the mixing chamber in which at least two kinds of raw materials are sprayed under high pressure.

As related technology, as depicted in , the configuration of a conventional mixing head 1 for making polyurethane foam is known. With reference to the , in the mixing head 1, the mixing chamber piston 3 recoils after the recoil of the cleaning piston 6, and polyols and isocyanates are sprayed from each spray nozzle 4 into a mixing chamber 5 at high pressure, respectively .

Polyols and isocyanates atomized at high pressure strongly collide with each other and against the wall in the mixing chamber 5, resulting in swirl and turbulence, and thereby mixing is obtained.

As depicted at , as the first mixed raw material passes through a constricted flow section 8, which is formed between the end 6a of the cleaning piston 6 and the wall end of the mixing chamber 5, a vortex and turbulence are re-formed and mixed. The mixture thus mixed passes through a discharge flow path 7 of a discharge pipe 2 and is injected into the mold. When a required amount is injected into the mold, the mixing chamber piston 3 advances and the cleaning piston 6 advances to cleanly inject the residue inside the mixing head 1 into the mold.

However, in the configuration of the conventional mixing head 1 as described above, when a powder is mixed so as to produce a molded foam which requires high impact resistance and high durability, sufficient mixing and satisfactory between the raw materials is not obtained, and the mixing performance to obtain a uniform mixture of raw materials may be the most important factor in determining the quality of a foamed product.

Due to the above problem, the applicant has developed a device which allows raw materials to be mixed uniformly and efficiently.

Korean Patent KR No. 10-0368178 (filed January 3, 2003) describes a high-pressure, high-efficiency injection head assembly according to the prior art.

Therefore, the present invention has been designed to solve the existing problems described above, and an objective to be achieved by the present invention is to provide a new-shaped mixing head unit having high mixing efficiency, which is capable of producing a molded foam which requires high impact resistance and high durability, by making a primary mixture of polyols and isocyanates in a raw material supply unit and making a secondary mixture of the powder supplied to through a powder feed unit.

In particular, an object to be achieved by the present invention is to provide a new-shape mixing head unit having high mixing efficiency, which is capable of producing a new-shape molded foam which requires high impact resistance. and high durability, such that when polyols and isocyanates supplied from a raw material supply unit and powder supplied from a powder supply unit are mixed and supplied to a reaction chamber of a mixing head body, mixing can be provided by a mixing element having a rotating body which is shaped to tilt up and down. Therefore, when the mixing element rotates, a swirl is generated by the rotating body, and therefore polyols, isocyanates and powder can be mixed and prepared efficiently in a uniform shape.

Additionally, since a molded foam can be molded quickly by supplying a catalyst to a mixture of a secondary mixture to make a tertiary mixture and allowing the resulting mixture to be exhausted through an exhaust unit, a The object of the present invention is to provide a newly shaped mixing head unit which is capable of reducing the manufacturing time of a molded foam.

According to the features of the present invention to achieve the objects described above, the present invention relates to a mixing head unit having high mixing efficiency comprising: a mixing head body with a hollow reaction chamber formed interior; a raw material supply unit for supplying liquid raw material to the reaction chamber from one side of the mixing head body; a powder supply unit for supplying powder to the reaction chamber from the upper part of the other side of the mixing head body; a mixing member, which is installed in the reaction chamber of the mixing head body, for mixing a liquid raw material and a powder supplied from the raw material supply unit and the powder supply unit; a driving unit which is installed on the upper part of the mixing head body, for driving the mixing element; and a discharge unit, which is formed on the lower part of the mixing head body, through which a mixture mixed by the mixing member is discharged.

According to a particular feature of the invention, in the mixing head unit having a high mixing efficiency according to the present invention as described above, the mixing element is characterized in that it comprises: a body rotary, the upper part of which is connected with the drive unit, and thus is located on the upper part of the reaction chamber of the mixing head body and rotates by the movement of the drive unit; a stem, which is formed on the lower part of the rotating body; and an impeller, which is formed in multiple numbers on the rod, for mixing a liquid and a powder.

According to a particular feature of the invention, in the mixing head unit having high mixing efficiency according to the present invention, the rotary body is characterized by comprising: a central shaft, which is connected to the drive unit; and a multiple number of rotating parts, which are formed at a set interval along the circumference of the central shaft.

According to a particular feature of the invention, in the mixing head unit having high mixing efficiency according to the present invention, the rotary part is characterized in that it is formed to be tilted up and down and, Therefore, the raw material and powder supplied from the raw material supply unit and the powder supply unit are supplied to the turbine by rotational pressure when the raw material and powder pass through the rotating parts and thereby a liquid and a powder are mixed.

According to a particular feature of the invention, in the mixing head unit having high mixing efficiency according to the present invention, the powder supply unit is characterized by comprising: a powder storage tank powder for storing powder; a powder supply nozzle, in which one side is connected to the powder storage tank and the other side is connected to the reaction chamber of the mixing head body, to supply powder; and a powder feed control valve, which is installed on the powder feed unit, for controlling the powder feed amount.

According to a particular feature of the invention, in the mixing head unit having high mixing efficiency according to the present invention, the mixing head unit comprises a catalyst supply unit, which is installed on the evacuation unit, to promote foaming of the mixture mixed by the mixing element.

To better illustrate the object of the present invention, a description will be given below, by way of illustration and not of limitation, of particular embodiments with reference to the appended drawings. In these drawings:

is a cross-sectional view illustrating the configuration of a typical mixing head.

is a diagram illustrating an action of mixing raw materials supplied according to the mixing head of the .

is a diagram illustrating the configuration of a mixing head unit having high mixing efficiency according to a preferred embodiment of the present invention.

is a cross-sectional view of a mixing head unit having high mixing efficiency according to a preferred embodiment of the present invention.

is a perspective view illustrating a mixing element in a mixing head unit having high mixing efficiency according to a preferred embodiment of the present invention.

is a side view illustrating a rotating body and a shaft of a mixing element in a mixing head unit having a high mixing efficiency according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same reference numerals are used for components performing the same functions in Figures 3 to 6. Meanwhile, in the illustration and detailed description of the drawings, detailed illustration and description of specific technical operations and configurations of elements which are not directly related to the technical characteristics of the present invention are omitted, and only the technical configurations related to the present invention are briefly illustrated or described.

Referring to Figures 3-6, the mixing head unit 10 having a high mixing efficiency according to a preferred embodiment of the present invention is set up such that it comprises: a mixing head body 20 with a hollow reaction chamber 21 formed therein; a raw material supply unit 30 for supplying liquid raw material to the reaction chamber 21 from one side of the mixing head body 20; a powder supply unit 40 for supplying powder to the reaction chamber 21 from the upper part of the other side of the mixing head body 20; a mixing member 50, which is installed in the reaction chamber 21 of the mixing head body 20, for mixing liquid raw material and powder supplied from the raw material supply unit 30 and the powder feed 40; a drive unit 60, which is installed on the upper part of the mixing head body 20, for driving the mixing element 50; and a discharge unit 70, which is formed on the lower part of the mixing head body 20, through which a mixture mixed by the mixing member 50 is discharged. In particular, the liquid raw materials are polyols and isocyanates, and the powder is an inorganic additive.

The mixing head body 20 has a shape of "ㄱ", and a raw material supply unit 30, to which raw materials are supplied, is formed on the side thereof which is formed in a horizontal direction. , and a hollow reaction chamber 21 is formed inside a part thereof which is formed in a vertical direction. Further, a communication hole 22, which communicates with the reaction chamber 21, is formed on the other side of the horizontally formed part. In particular, the reaction chamber is a place for secondary mixing, in which polyols and isocyanates, which are first mixed in a raw material supply unit described later, and a powder supplied through a unit powder feed are mixed.

The raw material supply unit 30 includes a mixing chamber 31, a supply port 32 and a return port 33, and a mixing chamber piston 34. In particular, the raw materials which are supplied and returned to supply port 32 and return port 33 are polyols and isocyanates and, as shown in , polyols and isocyanates are each independently supplied and returned through supply port 32 and return port 33, respectively.

The mixing chamber 31 is a space in which the independently introduced polyols and isocyanates are first mixed, and is connected to the upper part of the reaction chamber 21 of the mixing head body 20.

The supply port 32 sprays multiple raw materials flowing into the mixing chamber 31 by high pressure, and the return port 33 is installed to communicate with the mixing chamber 31 from the rear part of the feed port. feed port 32. Return port 33 allows polyols and isocyanates, which are supplied from feed port 32, to be introduced through return groove 341 of mixing chamber piston 34 depending on from the position of the mixing chamber piston 34 and to return to the raw material storage tank.

The mixing chamber piston 34 moves back and forth sliding in the mixing chamber 31 by receiving an operating force from a separate actuator, and the return groove 341 having a predetermined length is formed on one side of it along the longitudinal direction. The mixing chamber piston 34 slides between a position, in which polyols and isocyanates are supplied from the supply port 32 into the mixing chamber 31, and a position in which the raw materials supplied from the supply port 32 flow into return port 33 connecting supply port 32 and return port 33 along return groove 341. mixing chamber 34 advances, the raw materials atomized from the supply port 32 are fed into the return port 33 along the return groove 341 of the mixing chamber piston 34, while, when the mixing chamber 34 moves rearward, polyols and isocyanates supplied through each feed port 32 can be sprayed at high pressure into the mixing chamber 31, by opening the feed port 32 with reference to the mixing chamber 31.

The powder supply unit 40 is intended to supply powder to the reaction chamber 21 of the mixing head body 20. It is configured to include a powder storage tank 41 for storing powder; a powder supply nozzle 42 connected to the communication hole 22, in which one side is connected to the powder storage tank 41 and the other side is formed on the upper part of the other side of the reaction chamber 21 the mixing head body 20; and a powder supply control valve 43, which is formed on the powder supply nozzle 42 to control the amount of powder supplied from the powder storage tank 41.

The mixing member is installed in the reaction chamber 21 of the mixing head body 20 to mix powder and raw materials supplied from the raw material supply unit 30 and the powder supply unit 40 The mixing element is configured to include a rotating body 51, the upper part of which is connected to a drive unit 60 and which is thus located on the upper part of the reaction chamber 21 of the mixing head body 20. and rotates by the movement of a drive unit 60; a rod 52 formed on the lower part of the rotary body 51; and an impeller 53, which is installed in multiple numbers on the rod 52, for mixing a liquid and a powder.

Rotating body 51 is configured to include a central shaft 511 connected to drive unit 60; and multiple rotating parts 512 formed at predetermined intervals along the circumference of the central shaft 511. In particular, one rotating part 512 is formed to be tilted up and down.

By forming a rotary part 512 to be tilted up and down, when raw materials and powder supplied from the raw material supply unit 30 and the powder supply unit 40 pass between the rotary parts 512, they are supplied to the reaction chamber 21 of the mixing head body 20 while being vortex mixed, and are mixed efficiently by the impeller 53.

The drive unit 60 is installed on the top of the mixing head body 20 to drive the mixing member 50, and the exhaust unit 70 is formed on the bottom of the mixing head body 20, and the mixture mixed by the mixing element 50 is discharged.

As described above, according to the mixing head unit having high mixing efficiency according to the present invention, the mixing head unit having high mixing efficiency according to the present invention has an effect capable of producing a molded foam that requires high impact resistance and high durability, by making a primary mixture of polyols and isocyanates in a raw material supply unit and making a secondary mixture of the powder supplied through a unit powder feed.

In particular, the mixing head unit according to the present invention has an effect capable of producing a new-shaped molded foam which requires high impact resistance and high durability such that when polyols, isocyanates and a powder supplied from the powder supply unit are mixed in a raw material supply unit and supplied to a reaction chamber of a mixing head body, the mixture may be supplied from a mixing element having a rotating body which is shaped to be tilted up and down. Therefore, when the mixing element rotates, a swirl is generated by the rotating body and, as a result, polyols, isocyanates and powder can be mixed and prepared efficiently in a uniform form.

Meanwhile, according to the mixing head unit having high mixing efficiency according to a preferred embodiment of the present invention, a catalyst supply unit 80 is installed on the exhaust unit 70, and is configured to promote foaming of the mixture mixed by the mixing element 50. In particular, the catalyst supplied through the catalyst supply unit 80 is preferably R245fa, but is not limited thereto. Those skilled in the art will appreciate that various changes and modifications are possible without departing from the scope of the present invention.

As described above, since a molded foam can be molded quickly by supplying a catalyst to a mixture of a secondary mixture to make a tertiary mixture and allowing the resulting mixture to be exhausted through a unit of evacuation, the mixing head unit according to the present invention has an effect capable of reducing the manufacturing time of a molded foam.

As described above, a mixing head unit having high mixing efficiency according to a preferred embodiment of the present invention is illustrated according to the above description and the drawings. However, these are only illustrative embodiments of explanation, and ordinary engineers will appreciate that various changes and modifications are possible, without departing from the scope of the present invention.

As described above, the mixing head unit having high mixing efficiency according to the present invention has an effect capable of producing molded foam which requires high impact resistance and high durability, realizing a primary mixing of polyols and isocyanates in a raw material feed unit and making a secondary mix of the powder supplied through a powder feed unit.

In particular, the mixing head unit according to the present invention has an effect capable of producing a new-shaped molded foam which requires high impact resistance and high durability such that when polyols, isocyanates and a powder supplied from the powder supply unit are mixed in a raw material supply unit and supplied to a reaction chamber of a mixing head body, the mixture may be supplied from a mixing element having a rotating body which is shaped to be tilted up and down. Therefore, when the mixing element rotates, a swirl is generated by the rotating body and, as a result, polyols, isocyanates and powder can be mixed and prepared efficiently in a uniform form.

Additionally, since a molded foam can be molded quickly by supplying a catalyst to a mixture of a secondary mixture to make a tertiary mixture and allowing the resulting mixture to be exhausted through an exhaust unit, the The mixing head unit according to the present invention has an effect capable of reducing the manufacturing time of a molded foam.

Claims (6)

Mixing head unit (10) having a high mixing efficiency, characterized by the fact that it comprises:
a mixing head body (20) with a hollow reaction chamber (21) formed therein;
a raw material supply unit (30) for supplying liquid raw material to the reaction chamber (21) from one side of the mixing head body (20);
a powder supply unit (40) for supplying powder to the reaction chamber (21) from the upper part of the other side of the mixing head body (20);
a mixing member (50), which is installed in the reaction chamber (21) of the mixing head body (20), for mixing liquid raw material and powder supplied from the raw material supply unit ( 30) and the powder feed unit (40);
a driving unit (60), which is installed on the upper part of the mixing head body (20), for driving the mixing element (50); And
a discharge unit (70), which is formed on the lower part of the mixing head body (20), through which a mixture mixed by the mixing member (50) is discharged. Mixing head unit (10) according to claim 1, characterized in that the mixing element (50) comprises:
a rotating body (51), the upper part of which is connected with the driving unit (60) and is thus located on the upper part of the reaction chamber (21) of the mixing head body (20) and rotates by movement of the drive unit (60);
a rod (52), which is formed on the lower part of the rotating body (51); And
an impeller (53), which is formed in multiple numbers on the rod (52), for mixing a liquid and a powder. Mixing head unit (10) according to claim 2, characterized in that the rotating body (51) comprises:
a central shaft (511), which is connected to the drive unit (60); And
a multiple number of rotating parts (512), which are formed at a defined interval along the circumference of the central shaft (511). Mixing head unit (10) according to claim 3, characterized in that the rotating piece (512) is formed to be tilted up and down and, therefore, the raw material and the powder supplied by the unit feed material (30) and the powder feed unit (40) are supplied to the impeller (53) by rotating pressure when the raw material and the powder pass through the rotating parts (512) and, thereby, a liquid and a powder are mixed. Mixing head unit (10) according to claim 1, characterized in that the powder supply unit (40) comprises:
a powder storage tank (41) for storing powder;
a powder supply nozzle (42), in which one side is connected to the powder storage tank (41) and the other side is connected to the reaction chamber (21) of the mixing head body (20) , to provide a powder; And
a powder supply control valve (43), which is installed on the powder supply unit (41), for controlling the powder supply amount. Mixing head unit (10) according to claim 1, characterized in that it comprises a catalyst feed unit (80), which is installed on the discharge unit (70), to promote foaming of the mixture mixed by the mixing element (50).