KR20140063090A - Injection nozzle of injection molding machine - Google Patents

Abstract

The present invention has been made in view of the fact that the structure of the injection nozzle has been conventionally improved to smoothly supply and discharge the cooling water, and in particular, to cool the nozzle heated at the time of molding in a more rapid and efficient manner, The present invention relates to an injection nozzle having a cooling water circulation structure which is configured such that a more perfect nozzle cooling can be realized as the structure is improved so as to be circulated while passing through the entire area of the nozzle. 22 and the water outlet 24 are drawn into the interior of the nozzle body 20 formed in the inner space and a groove 11 having a certain depth along the longitudinal direction is employed in a spiral shape to form a water inlet hole 22 can be flown through the outflow hole 24 after a few passes from the front end to the end of the outer surface, There are those characterized by the induction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an injection nozzle having a cooling water circulation structure,

The present invention relates to a nozzle used for injection molding in general, and more particularly, to a nozzle which is improved in structure of injection nozzles in the past to induce smooth supply and discharge of cooling water, The structure of the cooling water circulation structure is configured so as to improve the structure of the nozzle so that the cooling water can be circulated more rapidly and efficiently so as to circulate the cooling water sequentially supplied to the entire area of the nozzle To an injection nozzle.

In general, a nozzle for an injection machine is a component that supplies molten resin from an injector to a cavity of a mold through a gate of a nozzle to form the molded article. Conventional nozzles have heretofore been provided with a nozzle body The nozzle body is heated while thermocouples are used to measure and control the temperature, so that the resin is not solidified but kept being melted continuously and is injected.

As is well known, a conventional injection molding machine is provided with a nozzle device for injecting molten resin to produce a desired molded product. For example, the nozzle device has a nozzle hole of a predetermined size at the lower end of a cylindrical nozzle part A cylinder for opening and closing a nozzle hole is provided in the inside of the nozzle, a heater means for melting the solid resin introduced into the nozzle is buried in the cylindrical wall of the nozzle, and a bushing Can be installed.

When the solid resin flows into the nozzle portion, the heater means heats up to about 200 ° C to melt the solid resin therein. At this time, the nozzle hole at the lower end of the nozzle portion is opened by the rise of the cylinder in the nozzle portion, Of the molten resin is injected and injected into the sprinkler.

However, when the conventional nozzle device having the above-described structure is continuously operated, the nozzle portion, particularly, the nozzle hole portion is overheated by the high-temperature heater means, and the surface of the formed product is melted in the nozzle hole end portion There is a problem that the molding tends to be scraped off. Thus, a cooling device must be essentially involved in order to produce a more complete molded product.

However, according to the cooling means of the conventional structure, the following problems arise. That is, although the cooling water provided in a cylindrical shape in the production of the automotive parts injection molding product is required to be supplied to the end portion of the nozzle, the cooling water is supplied to the end portion of the nozzle portion, The cooling water located deep inside the cooling space does not smoothly flow and is trapped. As a result, the overall cooling of the nozzle is not properly performed. This causes the occurrence of defects, Time is delayed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a spiral-shaped groove for guiding the flow of cooling water to the outer surface of the nozzle.

Another object of the present invention is to provide smooth and rapid flow of cooling water by continuously providing such recesses so as to form a specific angle over the entire area of the corresponding nozzle.

In order to achieve the above object, in the construction of the injection nozzle of the present invention,

The injection nozzle is provided with an inlet hole (22) and an outlet hole (24) for entering and exiting the cooling water into the interior of the nozzle body (20) drilled in the inner space, The recessed groove 11 is employed in a spiral shape so that the flow of the cooling water obtained from the water inlet hole 22 is guided through the water outlet hole 24 after passing a plurality of times from the outer surface front end to the end portion .

The groove 11 has a first straight line 12 extending downward from the horizontal line by 25 to 30 ° and a second straight line 12 extending upward to form an angle between the horizontal line and 25 to 30 °. And a bending line (14) for connecting the first straight line and the second straight line in a curved shape, wherein the first straight line (12) and the second straight line (13) And arranging them in parallel.

On the other hand, the bending line 14 is formed as a space narrower than the widths of the first straight line 12 and the second straight line 13, so that the flow of the cooling water can be promptly guided even in the curved region .

According to the present invention having the above-described configuration, a specific inclination angle is continuously formed over the entire area of the outer surface of the injection nozzle, so that the flow of the cooling water can be guided more smoothly and quickly and accurately. As a result, the obtained cooling water passes all over the entire area of the injection nozzle along the spiral-shaped groove, thereby enabling more efficient use of the cooling water, so that the complete cooling of the nozzle can be realized.

As a result, the injection lead time is shortened from 45 seconds to 30 seconds in the prior art, and the product defect rate of the molded product is greatly improved from about 6% to 2%, which maximizes work efficiency and productivity.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a louver perspective view constituted by a preferred embodiment of the present invention; Fig.
Fig. 2 is a perspective view of the coupling of Fig. 1; Fig.
3 is a side sectional view of Fig. 2; Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. However, it is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is intended that the disclosure of the present invention be limited only by the terms of the appended claims. And, throughout the specification, like reference numerals refer to like elements.

The present invention is directed to a cooling device for a cooling device for a cooling device which is capable of smoothly supplying and discharging cooling water and further cooling the corresponding nozzle heated at the time of molding in a quick and efficient manner, It is to be noted that the injection nozzle 10 of the cooling water circulation structure is structured such that cooling of a more perfect nozzle can be realized as the structure is improved so as to be circulated.

FIG. 1 is a perspective view of a preferred embodiment of the present invention, FIG. 2 is an assembled perspective view of FIG. 1, and FIG. 3 is a side sectional view of FIG.

As shown in FIG. 1, the present invention is an injection nozzle 10 that is drawn into a hollow inner space of a nozzle body 20 to perform a cooling function. In order to more smoothly flow the cooling water, And a groove (11) formed at a depth is continuously provided.

Here, the nozzle body 20 coupled with the injection nozzle 10 of the present invention is a conventional one, and includes a water inlet 21 for receiving cooling water, a water inlet 21 for supplying cooling water, which is formed in communication with the water inlet, And a water outlet (23) for allowing the cooling water to flow out, and an outlet hole (24) for communicating the cooling water after the cooling water is discharged from the outlet port to the outside. Since this is already known in the related art, further detailed description will be omitted.

However, in the present invention, there is a key point in providing a predetermined injection nozzle 10 so that the nozzle body 20 can be more fully and quickly cooled. To this end, the injection nozzle has a nozzle body The recess 11 is formed so that the cooling water flowing into the inner space can be discharged smoothly without passing through all the spaces.

More specifically, the intake hole 22 and the water outlet hole 24 are drawn into the nozzle body 20, which is perforated in the inner space, for the intake and outflow of the cooling water, The depth groove 11 is employed in a spiral shape so that the flow of the cooling water obtained from the water inlet hole 22 is guided through the water outlet hole 24 after passing through the water outlet pipe 24 several times from the front end to the end, Nozzle.

The recesses 11 are formed in a manner that the predetermined cooling water is supplied to the cooling space provided in the nozzle body during the production of the automotive parts injection molding, The present invention has been adopted in order to solve the problem that the cooling water located at the deep inner side of the cooling space can not flow and becomes trapped due to the outflow of the cooling water supply to the nozzle end without being able to enter the nozzle due to the reason of being located at the tip of the nozzle. The overall cooling of the nozzle can be performed more efficiently because the cooling water can be evenly distributed over the entire area of the injection nozzle.

The groove 11 is divided into a first straight line 12, a second straight line 13 and a bending line 14 for convenience of explanation. Specifically, the groove 11 is extended 25 to 30 degrees from the horizontal line A second straight line 13 extending upwardly so as to form an angle between the horizontal line and an angle of 25 to 30 degrees and a second straight line 13 extending in an upward direction to form a first straight line and a second straight line in a curved form And a bending line 14 for connecting the bending line 14 to the bending line.

In particular, although the first straight line 12 and the second straight line 13 are arranged in parallel to each other and the bending line 14 is not shown in detail in the drawing, It is preferable to form a space narrower than the width of the second straight line 13 so that the flow of the cooling water can be promptly guided even in the curved region.

This is a means for achieving a smooth flow of cooling water and a rapid and complete discharge without trapping of cooling water, which are the main points of the present invention. The straight lines 12, The cooling water obtained by the combination of the bending lines 14 is not limited to a specific region but can be flow-induced to the deepest region of the nozzle body 20 and the end portion of the injection nozzle 10, It is trying to destroy it.

It is to be noted that the angle defined between the first straight line 12 and the second straight line 13 is limited to satisfy the most ideal condition for the free flow of cooling water when installed and used with reference to the horizontal line. That is, when the cooling water received in the nozzle body 20 during the cooling operation of the mold in the horizontal state is guided to the grooves 11 of the present invention, the cooling water flows on the injection nozzle 10 for the optimum time It is possible to allow the cooling water which has been cooled to have a function to be promptly discharged, thereby allowing the newly supplied cooling water to enter again, thereby providing the means to satisfy the abnormal condition necessary for cooling.

The groove 11 may be a groove having a predetermined depth as shown in the drawing. For example, the groove 11 may be divided into two spaces, for example, the first straight line 12 and the second straight line 13, When the cooling water enters the bending line 14, the flow of cooling water in the bending line can be induced more smoothly due to the instantaneous pressure that is instantaneously blown out from the two divided spaces. Alternatively, in order to achieve the same effect, the first straight line 12 and the second straight line 13 have an expanded width as compared with the bending line 14 as described above, So that the flow of the cooling water can be performed more quickly.

As described above, according to the injection nozzle of the present invention constructed as described above, since a specific inclination angle is continuously formed over the entire area of the outer surface of the injection nozzle, the flow of the cooling water can be smoothly and quickly guided to the predetermined pathway . As a result, the obtained cooling water passes all over the entire area of the injection nozzle along the spiral-shaped groove, thereby enabling more efficient use of the cooling water, so that the complete cooling of the nozzle can be realized. As a result, the injection lead time is shortened from the conventional 45 seconds to 30 seconds, and the product defect rate of the molded product is greatly improved from about 6% to 2%, which maximizes work efficiency and productivity.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, will be. Therefore, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10. Injection nozzle 11. Groove
12. First straight line 13. Second straight line
14. Bend line 20. Nozzle body
21. Receiver 22. Receiver
23. Outlet 24. Outlet

Claims (3)

An injection nozzle having an inlet hole (22) and an outlet hole (24) inserted into a nozzle body (20) which is perforated in an inner space for the intake and outflow of cooling water,
A groove 11 having a certain depth along the longitudinal direction is employed in a spiral shape with respect to the entire outer surface area so that the flow of the cooling water obtained from the inlet hole 22 is passed through several times from the outer surface front end portion to the end portion, ) Of the cooling water circulation structure.
The method according to claim 1,
The groove 11 has a first straight line 12 extending 25 to 30 占 from the horizontal line and a second straight line 13 extending upward to form an angle between the horizontal line and 25 to 30 占And a bending line (14) for connecting the first straight line and the second straight line in a curved shape, wherein the first straight line (12) and the second straight line (13) are parallel to each other Wherein the cooling water circulation structure is formed by arranging the cooling water circulation structure.
3. The method of claim 2,
The bending line 14 is formed in a space narrower than the widths of the first straight line 12 and the second straight line 13 so that the flow of the cooling water can be promptly guided even in the curved region Injection nozzle of cooling water circulation structure.

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