KR200220549Y1 - Injecting device of mechanism for manufacturing sole of shoe made of poly-urethane for mixing material optimally - Google Patents

Abstract

The present invention relates to a device for injecting a polyurethane foam for the production of footwear for optimal mixing of the foam stock solution, each side installed at the bottom of the base (1) and receiving the foam stock solution having a different viscosity from the foam stock solution supply tank An inflow nozzle 11 and an outflow nozzle 13 having a mixing chamber 5 for mixing the foam stock solution from the block 6 and communicating with a supply tank on an inner surface of a receiving space portion formed inside the side block 6. ); It is installed in the receiving space so as to be slidable, and opening the discharge hole (10) formed in communication with the intermediate block (3) in the front of the receiving space, thereby expanding the discharge raw material from each supply tank A valve body 15 flowing through the intermediate block 3 and closing the discharge hole 10 to return the foamed feed solution introduced into the receiving space into the supply tank; And a gap adjuster installed at the rear portion of the accommodation space to be movable in the moving direction of the valve body 15 to support the rear portion of the valve body 15, thereby controlling the separation distance of the valve body 15. Thus, the foamed stocks having different viscosities are simultaneously supplied to the mixing chamber 5 for optimum mixing, and the rotation speed of the mixing impeller 7 is easily adjusted, and the power transmission to the impeller 7 is accurate. In other words, the manufacturing defect rate can be lowered.

Description

INJECTING DEVICE OF MECHANISM FOR MANUFACTURING SOLE OF SHOE MADE OF POLY-URETHANE FOR MIXING MATERIAL OPTIMALLY}

The present invention relates to a device for injecting a polyurethane foam for the production of shoes for optimal mixing of the foam stock solution, and more specifically, the foam stock solution with different viscosities are simultaneously supplied to the mixing chamber for optimal mixing and mixing. It is easy to adjust the rotational speed of the impeller and the power transmission to the impeller is accurate, and relates to the injection device of the foaming machine for polyurethane window production of shoes for optimally mixing the foaming stock solution that can lower the manufacturing failure rate.

In general, in recent years, shoes having various designs and functions have been manufactured by improving living standards and various needs of consumers. Typically, these shoes consist of a sole located on the bottom surface, a midsole coupled to the top of the sole, and the like. The sole is a part that is in direct contact with the ground, and the upper surface of the sole is attached to the midsole, and the upper portion of the midsole is attached to each of the insole that the user's soles are in contact, so that the normal shoe is a vertical layer of sole, midsole and insole It will have a structured body.

The outsole and midsole are made of polyurethane material with excellent layer absorption, and can protect the human body from external shocks. The sole and midsole are generally foam molded by injecting a polyurethane foam liquid into a molding die having a desired shape and size.

1 is a schematic configuration diagram of a polyurethane shoe manufacturing process of a general shoe. As shown in this figure, a certain section of the conveyor is provided with a variety of process equipment for manufacturing shoes. Each process unit is equipped with a machine suitable for the process to manufacture and process the workpiece moving on the belt of the conveyor.

The conveyor is moved by being driven by the driving motor 21 installed on the support frame 1, the drive motor 21 (not shown) installed on one side edge portion of the support frame 1, and the support frame 1. It consists of a moving belt portion and the like.

The moving belt part is composed of a plurality of carriers 3 for transport having a rectangular plate shape, and on each of these carriers 3, a window manufacturing mold 7 for manufacturing a shoe window is placed. Therefore, the mold 7 is moved along the conveyor together with the carrier 3 for conveyance so that the manufacturing operation can be performed in the process.

The mold 7 for manufacturing the window of the shoe is composed of a lower frame and a lower frame formed with a shape and a pattern corresponding to the bottom surface of the shoe. Thus, by injecting the polyurethane stock solution having the property of foam molding into the molding space inside the mold 7, a shoe window having a desired shape and size can be manufactured.

In the foaming step in which the above-described process is performed, the polyurethane foaming unit is installed to inject the polyurethane foaming stock solution into the window mold 7 which is conveyed through the conveyor.

2, 3 and 4, the polyurethane foam unit, a pair of mounting frames (9) installed in the transverse direction of the length of the conveyor in a shape surrounding the conveyor, the transport is installed on the conveyor A guide member 11 installed on the mounting frame 9 in the upper region of the carrier 3, a moving member 13 guided by the guide member 11 and installed to be movable in a horizontal direction, and a moving member 13. And an injection device 15 for injecting a polyurethane foam stock solution into each mold 7.

A plurality of transfer carriers 3, for example 100, are placed on the conveyor belt of the conveyor and arranged in a row, and on each transfer carrier 3, a mold 7 for shoe sole manufacturing having a different size is provided. Is placed.

The guide member 11 installed on the upper portion of the carrier 3 is formed in a pair of bar shapes so that both ends of each bar are slidably movable to each mounting frame 9 so as to be disposed between the two mounting frames 9. In the positioned state is to be able to slide in the longitudinal direction of the mounting frame (9).

In the guide member 11, a guide rail is formed in the longitudinal direction of the guide member 11, and the movable member 13 is guided by the guide rail so as to slide in the longitudinal direction of the guide member 11.

The moving member 13 has a body frame 21 extending downward, and the injection device 15 for injecting a polyurethane foam stock solution into each mold 7 is mounted on the body frame 21. The injection device 15 has a mixing chamber (5) (16) for producing a polyurethane foam stock solution by mixing a plurality of polyurethane preparation liquids respectively supplied from two stock tanks, for example, the polyurethane foam stock solution The mold 7 can be injected into the mold 7.

And, the side of the body frame 21 is equipped with a control panel 19 is provided with a number of buttons for operation, for example, 21 injection buttons 17 to correspond to the number of sizes of the window mold (7). .

A control unit 22 for controlling the overall operation of the polyurethane foam unit is installed at the rear side opposite to the conveyor of the body frame 21, so that the operator can easily control the foam unit.

The injection device, as shown in Figure 5, the base portion 1 of the circular cylinder, the intermediate block (3) is provided on the bottom of the base portion 1, the side block 6 is installed on both sides of the intermediate block (3) It is composed of a mixing chamber (5) is provided in the lower portion of the intermediate block (3).

Base portion 1 is a portion used to mount the injection device to the moving member (13). Both side blocks 6 are parts for transferring the foamed stock solution to the intermediate block 3 side or circulating back to the foamed stock supply tank.

A stirring impeller 7 is installed in the mixing chamber 5 in the longitudinal direction of the mixing chamber 5 to mix the introduced foaming stock with the respective foaming stocks supplied from both side blocks 6. have. On the outer surface of the impeller 7, a plurality of rotary blades are formed, so that the foamed stock solution flowing from both side blocks 6 can be mixed. The rotating shaft of the impeller (7) extends to the upper end of the base portion 1, the multi-stage pulley (9) consisting of three layers is installed at the upper end of the rotating shaft is connected to the drive motor (not shown) and the electric belt, The rotating shaft can rotate by the driving force of the drive motor. Thus, the impeller 7 can be accelerated and decelerated according to the position on the multistage pulley 9 to which the electric belt is fastened. Two foamed feed inlet nozzles 11 and an outlet nozzle 13 are installed on the side block 6 to supply the foamed feed solution from a foamed feedstock supply tank (not shown) and to circulate the foamed feedstock to the foamed feedstock supply tank again. It is supposed to be.

FIG. 7 is a cross-sectional view of the sideblock portion of FIG. 5 with the outlet to the mixing chamber closed. FIG. As shown in this figure, the side block 6 has a foamed solution receiving space therein, and one side of the receiving space is formed with a discharge hole 10 in communication with the mixing chamber (5). Foaming solution inlet nozzle 11 and outlet nozzle 13 connected to the foaming solution supply tank are respectively installed on the inner wall of the receiving space, and the foaming solution flowing from the supply tank through the inlet nozzle 11 is contained in the containing space. After passing through the outflow nozzle 13, it is possible to return to the supply tank.

A valve body 15 having a cylindrical bar shape is movable inside the housing space, and the front end of the valve body 15 can open and close the discharge hole 10. The valve body 15 On the opposite rear portion of the discharge hole 10, a support medium member 17 having a predetermined thickness and formed in a disc shape is attached, and an elastic spring 19 between the support medium member 17 and the inner surface of the receiving space. ) Is interposed so that the elastic spring 19 can elastically support the valve body 15. On the outer surface of the front part of the valve body 15, a packing valve 14 is formed to outwardly project, and the valve body 15 is slidably moved to open and close the inlet nozzle 11 and the outlet nozzle 13 alternately. I can do it. Thus, the foamed stock solution flowing into the receiving space through the inlet nozzle 11 is discharged to the mixing chamber 5 through the discharge hole 10 or returned to the supply tank through the outlet nozzle 13 again. . Here, the air flows alternately from the two air nozzles 20 provided at the rear part of the accommodation space into the accommodation space, whereby the valve body 15 is slidably moved by the air pressure. have.

By this configuration, when the mold for manufacturing a shoe 7 of the shoe seated on the carrier on the conveyor moves along the conveyor to approach the polyurethane foaming device side, the operator wants to inject the body frame 21 by hand. The injector 15 is approached to the window manufacturing mold 7 side. At this time, the moving member 13 is guided by the mounting frame 9 and the guide member 11, it is possible to move freely in the horizontal direction in the horizontal direction from the upper side of the carrier for transport.

When the injection device 15 approaches the target mold 7 to inject the polyurethane foam stock and is in the injection standby state, the operator checks the size of the target mold 7 to determine the injection amount of the polyurethane foam stock. . Then, the operator finds and presses the injection button 17 among the 21 injection buttons 17 installed on the operation panel 19, so that the polyurethane foam stock solution of the appropriate amount corresponding to the target mold 7 is injected into the injection device ( 15 is released through it can be injected into the target mold (7).

The operation mechanism when the injection device tries to inject the polyurethane foam stock solution is as follows.

When air flows from the air nozzle 20 into the receiving space of the side block 6 and the valve body 15 moves forward by the air pressure to close the discharge hole 10, the inlet nozzle 11 The foamed stock solution flowing from the supply tank through the outlet flows back to the supply tank through the outflow nozzle 13, so that the foamed stock solution is not supplied to the mixing chamber 5.

As shown in FIG. 8, when air flows from the air nozzle 20 to the front part of the accommodating space part, the valve body 15 slides backward in the accommodating space part by the air pressure, and the discharge hole ( 10 is opened and the packing valve 14 of the valve body 15 closes the outflow nozzle 13 so that the foamed raw liquid from the supply tank flows to the mixing chamber 5 through the discharge hole 10. do. Thus, the foaming stocks supplied from both side blocks 6 are mixed in the mixing chamber 5 and the impeller 7 is rotated to mix both foaming stocks, and the foaming stock is mixed into the mold through the injection nozzles of the mixing chamber 5. Is injected.

When the injection is finished, the air nozzle 20 is operated again so that the valve body 15 slides forward in the receiving space portion at the air pressure, so that the discharge hole 10 is closed and the outflow nozzle 13 is opened. The foamed stock solution introduced into the receiving space through the inlet nozzle 11 does not flow into the mixing chamber 5, but returns to the supply tank through the outlet nozzle 13 again.

On the other hand, in order for the mixed foam injected into the mold to be mixed at an optimum ratio, the expanded raw materials from both supply tanks must be simultaneously introduced into the mixing chamber and mixed.

The foamed stocks stored in each feed tank have different viscosities. Therefore, both foaming stocks are supplied at staggered times without being simultaneously introduced into the mixing chamber due to the difference in viscosity, so that the foaming mixture cannot be made into an optimal mixing state, resulting in a high incidence of defective products.

Therefore, the object of the present invention, which was devised to solve the above problems, the foaming stock with different viscosities are simultaneously supplied to the mixing chamber for optimal mixing, and it is easy to adjust the rotational speed of the mixing impeller and the impeller It is to provide an injection device of the polyurethane foaming machine for manufacturing shoes of shoes for optimally mixing the foaming stock solution that can lower the manufacturing failure rate by being accurate.

Figure 1-Schematic diagram of a general polyurethane window manufacturing process.

2-front view of the polyurethane foam unit of Figure 1;

3-a side view of FIG.

4-a top view of FIG.

5 is a cross-sectional view of a device for injecting a foamer for manufacturing a polyurethane window of a conventional shoe.

Figure 6-Bottom view of Figure 5;

Fig. 7-A cross sectional view of the sideblock portion of Fig. 5 with the outlet to the mixing chamber closed.

Fig. 8-A cross sectional view of the sideblock portion of Fig. 5 with the outlet opening to the mixing chamber open.

9 is a cross-sectional view of the injection device of the foaming machine for polyurethane window production of shoes according to the present invention.

Figures 10-9 are side views.

Fig. 11-A cross sectional view of the sideblock portion of Fig. 9 with the outlet to the mixing chamber closed.

Fig. 12-A cross sectional view of the sideblock part of Fig. 9 with the outlet opening to the mixing chamber open;

13-9 is a perspective view of an impeller mounted in the mixing chamber of FIG.

14-side view of the timing pulley portion of FIG.

<Explanation of symbols for the main parts of the drawings>

1: Base 3: Middle Block

5: mixing chamber 6: side block

7: impeller 10: discharge hole

15 valve body 31 hollow part

33: timing belt 35: timing pulley

In order to achieve the above object, the injection device of the polyurethane foam for the production of shoes for mixing the foaming solution according to the present invention is optimally installed on both sides of the base block, the middle block, the middle block is installed on the base bottom A side block receiving a foaming solution having a different viscosity from the foaming solution supply tank and a lower side of the intermediate block, the mixing chamber receiving mixing of the foaming solution from each sideblock and having a mixing chamber formed therein; An inlet nozzle and an outlet nozzle in communication with the supply tank on the inner side of the receiving space; It is installed to be slidably movable in the accommodating space part, and by opening the discharge hole formed in communication with the intermediate block at the front part of the accommodating space part, the foamed stock solution from each supply tank flows to the intermediate block through the discharge hole, and the discharge hole By closing the valve body, the valve body for returning the foamed stock solution introduced into the receiving space into the supply tank; And a gap adjuster installed at the rear portion of the accommodation space to be movable in the movement direction of the valve body to support the rear portion of the valve body to adjust the separation distance of the valve body, wherein the valve body has a hollow portion therein. The hollow portion is in communication with the inflow nozzle and the outflow nozzle, and when the valve body closes the discharge hole, the foamed stock solution from the inlet nozzle flows through the hollow portion to the outlet nozzle, so that the expanded stock solution returns to the supply tank.

Here, in the mixing chamber, a mixing impeller for mixing the foam stock solution is rotatably installed, the impeller is formed in a cylindrical shape, and a spiral groove is formed on the outer surface in a spiral shape along the longitudinal direction of the impeller, and the impeller Preferably, a plurality of circular grooves are formed in the radial direction, respectively. The impeller is made of nonferrous engineering plastics, preferably nylon, so that it can be used for a long time and is easy to clean.

The mixing chamber is also made of non-ferrous engineering plastics, preferably Teflon, so that the cleaning power can be improved and the mixing capacity can be improved. And, the rotation axis of the impeller is extended upward to the upper end of the base portion, the timing end pulley is installed on the upper end of the rotation shaft core and the timing belt is fastened to be engaged with the timing pulley is connected to the drive motor, the impeller by the driving force of the drive motor Can be rotated.

In the case where the drive motor is a DC motor, an electromagnetic plate volume controller for changing the rotational speed of the DC motor is provided so that a change value of the rotational speed of the DC motor changed by the electromagnetic plate volume controller is displayed through the display device. The rotational speed of the motor can be managed accurately.

Alternatively, when the drive motor is an AC motor, an inverter for changing the rotational speed of the AC motor may be provided, and the change value of the rotational speed of the AC motor changed by the inverter may be displayed through the display device unit.

Accordingly, the foaming stocks having different viscosities are simultaneously supplied to the mixing chamber for optimum mixing, and the rotation speed of the mixing impeller is easily adjusted, and the power transmission to the impeller is accurate, thereby lowering the manufacturing defect rate. .

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same parts as the prior art.

9 is a cross-sectional view of the injection device of the polyurethane window manufacturing foam of the shoe according to the present invention, Figure 10 is a side view of FIG. As shown in these figures, the injection apparatus is similar to the conventional one, the base block 1 of the circular barrel, the intermediate block (3) is installed on the lower side of the base unit 1, the side block is installed on both sides of the intermediate block (3) (6) and a mixing chamber (5) or the like provided below the intermediate block (3).

Both side blocks 6 are configured to receive the foamed stock solution having different viscosities from the foamed stock feed tank and to supply it to the mixing chamber 5. An accommodating space part is formed inside the side block 6, and an inlet nozzle 11 and an outlet nozzle 13 communicating with the supply tank are provided on the inner side of the accommodating space part, respectively.

A stirring impeller 7 is installed in the mixing chamber 5 in the longitudinal direction of the mixing chamber 5 to mix the introduced foaming stock with the respective foaming stocks supplied from both side blocks 6. have. The mixing chamber 5 is made of teflon, so that the washing power is excellent and the mixing ability is excellent.

As shown in FIG. 13, the impeller 7 is formed in a cylindrical shape, and a spiral groove portion is formed in a spiral shape along the longitudinal direction of the impeller 7 on the outer surface thereof, and a plurality of radially in the radial direction of the impeller 7 are formed. Circular grooves are formed respectively. The impeller 7 is simply made of a nylon material, and the washing power is improved, so that it can be used for a long time and is easy to clean.

In addition, the rotation axis of the impeller 7 extends upwardly to the upper end of the base 1, and as shown in FIG. 14, a timing pulley 35 is provided at the upper end of the rotation axis and the timing pulley 35 is provided. The impeller 7 is rotated by the driving force of the drive motor 21 by being connected to the drive motor 21 so that the timing belt 33 is engaged with the unevenness so as not to slip.

As the driving motor 21, a DC motor is employed, and the speed of the driving motor 21 is controlled by an electromagnetic plate volume controller, and the change value of the rotational speed of the driving motor changed by the electromagnetic plate volume controller is displayed on the display device. It can be displayed through the wealth.

11 and 12, an accommodating space part is formed in each side block 6, and an inlet nozzle 11 and an outlet nozzle 13 communicating with a supply tank are formed on an inner side of the accommodating space part. Each is installed. In addition, the valve body 15 is slidably installed in the accommodation space, and the opening from the supply tank is opened by opening the discharge hole 10 formed in communication with the intermediate block 3 at the front of the accommodation space. The stock solution flows to the intermediate block 3 through the discharge hole 10 and the discharge hole 10 is closed, so that the foamed liquid solution introduced into the containing space part can be returned to the supply tank.

The gap adjusting body 30 is provided at the rear portion of the accommodation space so as to be movable in the movement direction of the valve body 15 to support the rear portion of the valve body 15, thereby providing a separation distance between the valve bodies 15. It is adjustable. Thus, by adjusting the separation distance of the valve body 15 according to the viscosity of the foamed stock solution stored in each supply tank, the foamed stock solution can be introduced into the mixing chamber 5 from each side block 6 at the same time.

The valve body 15 has a hollow part 31 therein, and the hollow part 31 communicates with the inlet nozzle 11 and the outlet nozzle 13 so that the valve body 15 closes the discharge hole 10. When the foaming stock solution from the inlet nozzle 11 flows to the outflow nozzle 13 through the hollow part 31, the foaming stock solution can return to the supply tank. In addition, the valve body 15 is slidably moved inside the receiving space by the air pressure supplied from the air nozzle 20 provided in the side block 6.

Hereinafter will be described the operation and effect of the injection device of the polyurethane foam for the production of shoes according to the present invention.

When air flows from the air nozzle 20 into the receiving space of the side block 6 and the valve body 15 moves forward by the air pressure to close the discharge hole 10, the inlet nozzle 11 The foamed stock solution flowing from the supply tank flows through the hollow part 31 of the valve body 15 to return to the supply tank through the outlet nozzle 13 again, and the foamed stock solution is supplied to the mixing chamber 5. Will not be.

Then, when air flows from the air nozzle 20 to the front part of the receiving space, the valve body 15 slides backward in the receiving space by the air pressure, and the discharge hole 10 is opened and at the same time the valve body is opened. As the 15 closes the outflow nozzle 13, the foaming stock solution from the supply tank flows through the discharge hole 10 into the mixing chamber 5. Thus, the foamed stock solution supplied from both sideblocks 6 is mixed in the mixing chamber 5 and the impeller 7 is rotated to mix both foamed stock solutions, and the foaming solution is mixed into the mold through the injection nozzle of the mixing chamber 5. Is injected. At this time, since the separation distance of each valve body 15 of each side block 6 is adjusted by the gap adjuster 30, the foamed liquid having different viscosities can be introduced into the mixing chamber 5 at the same time. .

Since the impeller 7 mixing the foaming liquid in the mixing chamber 5 receives the driving force of the driving motor 21 to the extent that there is almost no power loss by the timing belt 33, each of the foaming liquids is brought into an optimum state. Will be mixed. Then, the foaming stock solution is more effectively mixed by the complicated rotary blades formed by the spiral groove portion and the circular groove portion formed on the outer surface of the impeller 7.

When the injection is finished, the air nozzle 20 is operated again so that the valve body 15 slides forward in the receiving space portion at the air pressure, so that the discharge hole 10 is closed and the outflow nozzle 13 is opened. The foamed stock solution introduced into the receiving space through the inlet nozzle 11 does not flow into the mixing chamber 5, but returns to the supply tank through the outlet nozzle 13 again.

As a result, foamed stocks having different viscosities are simultaneously supplied to the mixing chamber 5 to be optimally mixed, and the rotation speed of the mixing impeller 7 can be easily adjusted, and power transmission to the impeller 7 is accurate. As a result, the manufacturing failure rate is lowered.

Although the mixing chamber is made of teflon and the impeller is made of nylon in the above-described and illustrated examples, it is not limited to the injection device of the polyurethane foaming machine for manufacturing shoes of shoes according to the present invention. Of course, mixing chambers and impellers can be made of non-ferrous engineering plastics.

In addition, although the DC motor is employed as the drive motor and the speed of the DC motor is controlled by the electromagnetic plate volume regulator, it is also possible to employ the AC motor as the drive motor and control the rotational speed of the AC motor as the inverter.

As described above, according to the injection device of the polyurethane foaming machine for shoe production for optimal mixing of the foaming stock solution according to the present invention, foaming stocks with different viscosities are simultaneously supplied to the mixing chamber for optimal mixing and mixing. It is easy to adjust the rotational speed of the impeller for the power transmission to the impeller is accurate, there is an effect that the manufacturing failure rate is lowered.

Claims (9)

A base block, an intermediate block installed at a lower end of the base unit, a side block installed at both sides of the intermediate block and receiving a foamed solution having a different viscosity from the foamed feedstock supply tank, and installed at a lower portion of the intermediate block from the sideblocks; In the injection device of the polyurethane foaming machine for the production of shoes for optimally mixing the foaming stock solution having a mixing chamber for supplying and mixing the foaming stock solution, An accommodation space formed in the side block; An inlet nozzle and an outlet nozzle communicating with the supply tank on an inner surface of the accommodation space; It is installed to be slidably movable in the receiving space portion, and by opening the discharge hole formed in communication with the intermediate block in the front of the receiving space portion, the foamed stock solution from the respective supply tank through the discharge hole in the intermediate A valve body which flows to the block and closes the discharge hole, thereby returning the foamed stock solution introduced into the accommodation space to the supply tank; And It is provided in the rear portion of the accommodating space portion to be movable in the direction of movement of the valve body to include a gap adjusting body for adjusting the separation distance of the valve body by supporting the rear portion of the valve body, The valve body has a hollow portion therein, and the hollow portion communicates with the inflow nozzle and the outflow nozzle so that when the valve body closes the discharge hole, the foamed stock solution from the inflow nozzle flows into the outflow nozzle through the hollow portion. A device for injecting a foamer for polyurethane window production of footwear for optimally mixing a foaming stock solution, characterized in that the foaming stock solution returns to the supply tank by flowing. The mixing chamber of claim 1, wherein a mixing impeller for mixing the foamed stock solution is rotatably installed in the mixing chamber, the impeller is formed in a cylindrical shape, and an vortex is formed along the longitudinal direction of the impeller on an outer surface thereof. Swivel groove portion is formed and a plurality of circular groove portion in the radial direction of the impeller, the injection device of the polyurethane window production foamer for shoes for optimal mixing of the foaming stock solution, characterized in that each formed. According to claim 1 or 2, wherein the axis of rotation of the impeller extends upwardly to the upper end of the base portion, the timing end pulley is installed on the upper end of the rotation axis core and the timing belt is fastened to engage the unevenness to the timing pulley is driven The injection device of the polyurethane foaming machine for shoe manufacturing for optimal mixing of the foaming stock solution, characterized in that the impeller is rotated by the driving force of the drive motor by being connected to the motor. The injection device of the polyurethane foaming machine for manufacturing shoes of claim 1, wherein the mixing chamber is made of non-ferrous engineering plastics. The injection device of the polyurethane foaming machine for manufacturing shoes of claim 4, wherein the engineering plastic is teflon. The injector of claim 2, wherein the impeller is made of non-ferrous engineering plastics. 7. The injection device of the polyurethane foaming machine for manufacturing shoes according to claim 6, wherein the engineering plastic is nylon. The method of claim 3, wherein the injection device further comprises an electromagnetic plate volume controller for changing the rotational speed of the drive motor employing a DC motor, the change of the rotational speed of the drive motor that is changed by the electromagnetic plate volume control The injection device of the polyurethane foaming machine for shoe manufacturing for optimal mixing of the foaming stock solution, characterized in that it is displayed through the display unit. The method of claim 3, wherein the injection device further comprises an inverter for changing the rotational speed of the drive motor employing an AC motor, wherein the change of the rotational speed of the drive motor changed by the inverter is displayed via the display device unit Injection device of the polyurethane foam for the production of shoes for mixing the foaming solution, characterized in that the optimal.