KR20190005266A - Cooling structure of mold - Google Patents

Abstract

The present invention relates to a cooling structure of a mold for shaping a receptacle connector housing, capable of reducing cooling time and improving cooling efficiency by making multichannel passages in a mold for circulating cooling water. The passages for circulating cooling water comprise: an upper passage located in the upper part of the cavity; a lower passage located in the lower part of the cavity; and a connection passage connecting the upper and lower passages. The upper passage comprises: first and second passages placed on the front and rear sides of the cavity in parallel; a third passage placed on a side of the cavity and connecting the first and second passages; and a fourth passage placed on the other side of the cavity and connecting the first passage to the inlet. The lower passage comprises: fifth and sixth passages placed on the front and rear sides of the cavity in parallel; a seventh passage placed on a side of the cavity and connecting the fifth and sixth passages; and an eighth passage placed on the other side of the cavity and connecting the fifth passage to the inlet. The connection passage comprises: a first angle connected to the second passage; a second angle connected to the seventh passage; and an extending part connecting the first and second angles.

Description

Cooling Structure of a Mold {COOLING STRUCTURE OF MOLD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold cooling structure, and more particularly, to a cooling structure of a mold for molding a receptacle connector housing.

In general, a connector is a connection mechanism for electrically connecting a power source and an apparatus, an apparatus and an apparatus, and an internal unit of the apparatus. Such a connector is composed of a pair of plug connectors, i.e., a plug connector and a receptacle connector, which can be coupled to each other. A terminal for transmitting current and signals is provided inside the mail connector and the female connector.

With reference to Korean Patent Registration No. 10-1493987 (Feb. 20, 2015), the receptacle connector 1 includes a housing 30 into which a plug connector (not shown) is inserted when a connector is coupled. A housing space 30 into which the plug connector is inserted is provided in the housing 30 and a terminal 50 is provided in the housing space 32 to transmit a current and a signal. A lance 34 for fixing the terminal 50 installed in the accommodation space 32 is formed in the housing 30.

The housing of the receptacle connector is manufactured by injection molding through a predetermined molding apparatus. An apparatus for injection molding a connector housing comprises a plurality of detachable dies. In the interior of the mold, a plurality of cavities having a shape corresponding to the connector housing are arranged laterally at regular intervals, and a flow passage for circulating cooling water is provided so as to entirely surround a plurality of cavities arranged in the left and right direction.

However, there is a problem that the external temperature and the internal temperature of the connector housing are not uniform, because the channel for circulating the cooling water provided in the conventional mold has a two-channel structure that entirely covers a plurality of cavities. Particularly, since the lance portion formed inside the connector housing is not smoothly cooled, the cooling efficiency is lowered and the cooling time is increased.

Korean Registered Patent No. 10-1493987 (Feb.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the related art, and an object of the present invention is to provide a cooling structure for a housing molding die for a receptacle connector, which can improve cooling efficiency and shorten a cooling time by improving the channel for circulating cooling water, The purpose is to provide.

The mold cooling structure according to the present invention for achieving the above object is a mold in which a plurality of cavities having a shape corresponding to a housing of a receptacle connector are arranged back and forth and left and right, A channel for circulating the channel cooling water is provided.

The cooling water circulation flow path has an inlet port connected to a supply line through which cooling water is supplied and an outlet port connected to a discharge line through which cooling water is discharged to the other end of the cooling water circulation flow path, And is opened through the side surface of the mold.

The cooling water circulation flow path includes an upper flow path positioned above the cavity, a lower flow path positioned below the cavity, and a connection flow path connecting the upper flow path and the lower flow path.

Wherein the upper flow path includes first and second flow paths disposed in parallel to the front and rear of the cavity, a third flow path disposed at one side of the cavity and connecting the first flow path and the second flow path, And a fourth flow path connecting the first flow path and the injection port.

Wherein the lower flow path includes a fifth flow path and a sixth flow path disposed in parallel to the front and rear of the cavity, a seventh flow path disposed at one side of the cavity and connecting the fifth flow path and the sixth flow path, And an eighth flow path connecting the fifth flow path and the discharge port.

The connection channel includes a first angle connected to the second flow path, a second angle connected to the seventh flow path, and an extension connecting the first angle and the second angle.

The cooling structure of the mold according to the present invention may further include an auxiliary flow path for cooling the sprue into which the molten material is injected. At this time, the auxiliary flow path may be arranged along the periphery of the sprue and arranged in a zigzag manner in the longitudinal direction of the sprue.

The present invention constructed as described above is provided with a multi-channel cooling water circulation flow path for individually cooling a plurality of cavities, so that the outside and inside of the molded receptacle connector housing can be uniformly cooled. Accordingly, it is an object of the present invention to provide a cooling structure of a mold for molding a receptacle connector housing which can improve the cooling efficiency and shorten the cooling time.

1 is a perspective view of a mold for molding a connector housing to which a cooling structure according to an embodiment of the present invention is applied;
2 is an exploded perspective view of a mold for molding a connector housing to which a cooling structure according to an embodiment of the present invention is applied.
3 is a plan view of a mold for molding a connector housing to which a cooling structure according to an embodiment of the present invention is applied.
4 is a view showing a flow path for circulating cooling water in a mold for molding a connector housing to which a cooling structure according to an embodiment of the present invention is applied.
5 is an enlarged view of one of the flow paths for circulating cooling water in a mold for molding a connector housing to which a cooling structure according to an embodiment of the present invention is applied;
6 is a view showing an auxiliary flow path of a mold for molding a connector housing to which a cooling structure according to an embodiment of the present invention is applied;
FIG. 7 is a graph showing a flow rate when a molten material is injected into a mold according to an embodiment of the present invention and a comparative example; FIG.
FIGS. 8 and 9 are graphs showing internal temperatures of a receptacle connector housing formed by a mold according to an embodiment of the present invention and a mold according to a comparative example.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, embodiments of the present invention will be described in detail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, a mold 1 for molding a receptacle connector housing according to an embodiment of the present invention includes first to third molds 10 to 20 stacked vertically, 30).

The first mold 10 is formed with a sprue 100 for injecting the melted material and a runner 200 for feeding the material injected through the sprue 100. [ At the end of the runner 200, a cavity 300 corresponding to the shape of the product to be molded is formed.

The cavity 300 of the present embodiment has a shape corresponding to the housing of the receptacle connector and consists of eight pairs arranged in front and rear and left and right sides of the mold 1, that is, 16 in total so as to enable mass production.

The second mold 20 and the third mold 30 are provided with a flow passage 400 for circulating cooling water for cooling the product molded in the cavity 300. The cooling water circulation flow path 400 is composed of multiple channels that individually surround eight pairs of cavities 300 so as to improve the cooling efficiency and shorten the cooling time.

The structure of the cooling water circulation passage 400 will be described with reference to FIG.

As described above, the cooling water circulating flow path 400 is composed of eight pieces each of which surrounds the eight pairs of cavities 300 individually. The unitary cooling water circulation flow path 400 surrounding the pair of cavities 300 includes an upper flow path 410 positioned at an upper portion of the cavity 300 and a lower flow path 420 positioned at a lower portion of the cavity 300 And a connection flow path 430 connecting the upper flow path 410 and the lower flow path 420.

An inlet 440 connected to a supply line for supplying the cooling water is provided at one end of the channel 400 for circulating the cooling water and an outlet 440 connected to a discharge line for discharging the cooling water is connected to the other end of the channel 400 for circulating the cooling water 450 are provided. At this time, the injection port 440 and the discharge port 450 are opened through the side surface of the mold 1.

The upper flow path 410 has a rectangular ring-shaped path surrounding the periphery of the pair of cavities 300. That is, the first and second flow paths 412 and 414 are disposed in parallel to the front and rear of the cavity 300. A third flow path 416 bent in a C shape is disposed on one side of the cavity 300 so that the first flow path 412 and the second flow path 414 are connected to each other and the first flow path 412 And the injection port 440 are connected to each other.

The lower flow path 420 is formed by a path having the same rectangular ring shape as the upper flow path 410. The fifth and sixth flow paths 422 and 424 are arranged in parallel to the front and rear of the cavity 300 and the fourth flow path 422 and the sixth flow path 424 are connected to one side of the cavity 300, And an a-shaped eighth flow path 428 connecting the fifth flow path 422 and the discharge port 450 is disposed on the other side of the cavity 300. [

The connecting flow channel 430 includes a first angle 432 and a second angle 434 connected to the second flow path 414 and the seventh flow path 426 and a first angle 432 and a second angle 432, And an extension 436 connecting the angle 434.

When the upper flow path 410 and the lower flow path 420 have a rectangular ring path surrounding the cavity 300 as in the present embodiment, the outer and inner portions of the receptacle connector housing formed in the cavity 300 are uniformly cooled . Particularly, the expansion spaces 442 and 452 are added between the fourth flow path 418 and the injection port 440 and between the eighth flow path 428 and the discharge port 450 to smoothly circulate the cooling water, .

The first flow path 412 and the second flow path 414 are formed to be smaller in diameter than the third flow path 416 and the fourth flow path 418 and the fifth flow path 422 and the sixth flow path 424 And is smaller in diameter than the seventh flow path 426 and the eighth flow path 428. For example, the diameters of the first flow path 412 and the second flow path 414 may be 4 mm, and the diameters of the third flow path 416 and the fourth flow path 418 may be 5 mm. The diameter of the fifth flow path 422 and the sixth flow path 424 may be 4 mm and the diameter of the seventh flow path 426 and the eighth flow path 428 may be 5 mm.

As described above, when the diameters of the upper flow path 410 and the lower flow path 420 are partially different from each other, the feeding speed of the cooling water can be controlled to be different from each other. That is, since the first and second flow paths 412 and 414 and the fifth and sixth flow paths 422 and 424 have a relatively small diameter, the feeding speed of the cooling water is high while the third and fourth flow paths 416 and 418 and the seventh and Since the eighth flow paths 426 and 428 have a relatively large diameter, the conveying speed of the cooling water is slow.

As a result, the cooling water is rapidly transferred from the first and second flow paths 412 and 414 and the fifth and sixth flow paths 422 and 424 having a relatively long path, and the third and fourth flow paths 416 and 418 having a relatively short path When the cooling water is slowly transferred in the seventh and eighth flow paths 426 and 428, the molded receptacle connector housing can be uniformly cooled as a whole.

As shown in FIG. 6, the mold 1 according to the present embodiment further includes an auxiliary flow path 500 for cooling the sprue 100 into which the molten material is injected.

The auxiliary flow paths 500 are arranged along the periphery of the sprue 100 and arranged in a zigzag arrangement in the longitudinal direction of the sprue 100. [ For example, the auxiliary flow path 500 of the present embodiment has a structure in which a U-shaped flow path and a U-shaped flow path are alternately arranged along the periphery of the sprue 100. [

Example

Hereinafter, a concrete example of molding the receptacle connector housing using a mold will be described. In this example, the receptacle connector housing is formed and cooled using a mold according to an embodiment of the present invention, and a comparative example is an example of molding and cooling the receptacle connector housing using a conventional mold.

[Experimental Example]

In this experimental example, the receptacle connector housing was formed and cooled using a metal mold having a multi-channel structure provided with a coolant flow path for each cavity, that is, a cavity according to an embodiment of the present invention.

Here, the temperature of the molten material injected into the mold was 260 占 폚, the temperature of the mold was 24 占 폚, and the injection time was 1 sec. In addition, the time required for injection, packing, and cooling was 42.6 sec in total, the packing pressure was 60 MPa, and the packing time was 1.5 sec.

[Comparative Example]

In this comparative example, the housing of the receptacle connector was formed and cooled by using a mold having a short channel structure provided with a flow passage for the coolant water for each of the four cavities. At this time, the molding and cooling conditions were the same as those in the above-described experimental example. That is, the temperature of the molten material injected into the mold was 260 DEG C, the temperature of the mold was 24 DEG C, and the injection time was 1 second. In addition, the time required for injection, packing, and cooling was 42.6 sec in total, the packing pressure was 60 MPa, and the packing time was 1.5 sec.

FIG. 7 (a) shows the flow rate when the molten material is injected into the mold according to the experimental example, and FIG. 7 (b) shows the flow rate when the molten material is injected into the mold according to the comparative example.

As shown in the figure, in the case of the experiment and the comparative example, it was confirmed that the flow congestion of the molten material and the unformed state did not occur in the process of molding the receptacle connector housing.

 8 (a) and 9 (a) show the internal temperature of the receptacle connector housing formed by the mold according to the experimental example, and Figs. 8 (b) and 9 And the internal temperature of the receptacle connector housing. 8 (a) and 8 (b) are temperatures measured after the molten material is injected into the mold, and FIGS. 9 (a) and 9 (b) It is the temperature measured after cooling.

As shown in FIGS. 8 and 9, after the molten material was completely injected into the mold, the internal temperature of the receptacle connector housing was measured. As a result, the temperature of the lance portion of the housing formed in the mold according to Experimental Example was 266.7 ° C., It was confirmed that the temperature of the lance portion of the molded housing in the mold according to the comparative example was 280.4 ° C.

As a result of measuring the internal temperature of the housing of the receptacle connector after cooling the material injected into the mold, the temperature of the lance portion of the housing formed in the mold according to the experimental example was 45.94 ° C, and the temperature of the housing formed in the mold according to the comparative example And the lance portion temperature was 51.11 ° C.

As a result, it was confirmed that the experimental example has better cooling efficiency and shorter cooling time than the comparative example.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Those skilled in the art will understand. Therefore, the scope of protection of the present invention should be construed not only in the specific embodiments but also in the scope of claims, and all technical ideas within the scope of the same shall be construed as being included in the scope of the present invention.

1: Mold for receptacle connector housing molding
10: first mold 20: second mold
30: Third mold 100: Spruce
200: Runner 300: Cavity
400: Flow passage for circulating cooling water 500:

Claims (12)

A plurality of cavities having a shape corresponding to the housing of the receptacle connector are arranged back and forth and left and right,
And a multi-channel cooling water circulation flow path for individually cooling the plurality of cavities is provided.
The method according to claim 1,
The cooling water recirculation passage has an inlet port connected to a supply line through which cooling water is supplied and an outlet port connected to a discharge line through which cooling water is discharged.
Wherein the injection port and the discharge port are opened through a side surface of the mold.
The method of claim 2,
Wherein the cooling water circulation flow path includes an upper flow path located at an upper portion of the cavity, a lower flow path positioned at a lower portion of the cavity, and a connection flow path connecting the upper flow path and the lower flow path. rescue.
The method of claim 3,
Wherein the upper flow path includes first and second flow paths disposed in parallel to the front and rear of the cavity, a third flow path disposed at one side of the cavity and connecting the first flow path and the second flow path, And a fourth flow path connected to the first flow path and the injection port.
The method of claim 4,
Wherein the lower flow path includes a fifth flow path and a sixth flow path disposed in parallel to the front and rear of the cavity, a seventh flow path disposed at one side of the cavity and connecting the fifth flow path and the sixth flow path, And an eighth flow path connected to the fifth flow path and the discharge port.
The method of claim 5,
Wherein the third flow path is bent in a C shape so that the first flow path and the second flow path are connected to each other,
And the sixth flow path is bent in a C shape so that the fifth flow path and the seventh flow path are connected to each other.
The method of claim 6,
Wherein an expansion space is provided between the fourth flow path and the injection port, and between the eighth flow path and the discharge port.
The method of claim 7,
Wherein the connection channel includes a first angle connected to the second flow path, a second angle connected to the seventh flow path, and an extension connecting the first angle and the second angle. .
The method of claim 8,
Wherein the first flow path and the second flow path are formed to have diameters smaller than the third flow path and the fourth flow path,
Wherein the fifth flow path and the sixth flow path are formed to have diameters smaller than the seventh flow path and the eighth flow path.
The method of claim 9,
The diameter of the first flow path and the second flow path is 4 mm, the diameter of the third flow path and the fourth flow path is 5 mm,
Wherein the diameter of the fifth flow path and the sixth flow path is 4 mm, and the diameter of the seventh flow path and the eighth flow path is 5 mm.
The method according to any one of claims 1 to 10,
And an auxiliary flow path for cooling the sprue to which the molten material is injected.
The method of claim 11,
Wherein the auxiliary flow path is arranged along the periphery of the sprue and arranged in a zigzag manner in the longitudinal direction of the sprue.

Images