KR20050003110A - Core cool structure of injection molding - Google Patents

Abstract

PURPOSE: A core cooling structure of an injection mold is provided to cool down left and right sides of a core at equal temperature by supplying cooling water to cool from a central portion of the core and to improve production efficiency by shortening a withdrawal cycle. CONSTITUTION: A core cooling structure of an injection mold having a core(10) with a cooling water passage(20) to cool and harden an injected article(A) is composed of a cooling water supply unit(30,30a) for communicating with both the cooling water passages symmetrical to each other about a central portion of the core and feeding the cooling water and a cooling water discharge port(40,40a) communicating with the cooling water passage of both ends of the core and discharging the cooling water passing through the cooling water passage formed in the center. The core cooling structure executes a quick cooling by cooling down from the central portion of the core with high temperature by the cooling water.

Description

Core cooling structure of injection mold {CORE COOL STRUCTURE OF INJECTION MOLDING}

The present invention relates to a core cooling structure of an injection mold for molding a plastic injection molding, and more particularly, to cooling the core uniformly and rapidly with an efficient supply of cooling water circulating in a cooling water passage of a core. It's about structure.

In general, the cooling function of the injection mold forms a cooling water passage in the core of the mold for ejecting the product, and allows the injection molding to be cooled and hardened by the cooling water passing through the cooling water passage.

1 is a side cross-sectional view of a molding of a plastic injection molding such as a television back cover mold, FIG. 2A is a plan view showing a conventional injection mold core cooling structure, and FIG. 2B is a side cross-sectional view showing a conventional injection mold core cooling structure.

Cooling water passages (2) through which cooling water passes are formed inside the core (1) for molding the injection molding (A), and the cooling water supply ports (3) communicating with the cooling water passages (2) on both sides of the core (1); Cooling water outlet 4 is formed.

Here, the order of supply and discharge of the coolant will be described based on the upper coolant passage 2, and the coolant supplied through the coolant supply port 3 is left to right in the direction of the arrow in FIG. From right to left, the coolant below it is cooled in a continuous manner from left to right.

Therefore, in the circulation system of such cooling water, the temperature of the left side and the right side of the symmetrical shape of the core 1 becomes uneven. In addition, since the cooling of the central part of the core 1 with the highest temperature during injection is delayed and the temperature of the central part is increased, the cooling time of the entire mold due to the deformation of the product due to the uniform core temperature and the cooling delay. This delayed there was a problem that the productivity of the injection molding is lowered.

The present invention has been made in order to solve the above-described drawbacks, by supplying a coolant to cool from the center of the core, the left and right sides of the core is cooled to a uniform temperature, so as to enable a quick and uniform cooling of the core Therefore, the object of the present invention is to provide a cooling structure of the mold core, which prevents deformation of the product and shortens the take-out cycle time, thereby remarkably improving the product production capacity of the mold.

The present invention for achieving the above object, in the core cooling structure of the injection mold comprising a core having a cooling water passage therein for cooling and curing the injection molding, the center of the core from the left and right mutually Cooling water supply unit is provided in each of the symmetrical cooling water supply passages for supplying the cooling water, and a cooling water outlet for communicating with the cooling water passages at both ends of the core and passing through the central cooling water passage is installed. It provides a core cooling structure of an injection mold, characterized in that the rapid cooling is performed by cooling with a low temperature cooling water from the center of the high temperature core.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

1 shows a plastic injection molding of a typical television back cover,

Figure 2a is a plan view showing a conventional injection mold core cooling structure,

Figure 2b is a side cross-sectional view showing a conventional injection mold core cooling structure,

3 is a plan sectional view of a core cooling structure of an injection mold according to the present invention.

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

10: core 20: with cooling water

30, 30a: cooling water supply port 40, 40a: cooling water discharge port

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a plan sectional view of a core cooling structure of an injection mold according to the present invention.

The core 10 for forming the injection molding A, the cooling water passage 20 through which the cooling water passes, and the cooling water supply port communicating with the cooling water passage 20 to supply and discharge the cooling water. 30 and 30a and cooling water discharge ports 40 and 40a.

The cooling water passage 20 is provided with a cooling water partition 22 positioned vertically in the inner center.

Here, according to the characteristics of the present invention, the cooling water supply parts 30 and 30a which are continued from both ends of the injection molding A are respectively communicated with both cooling water passages 20 which are mutually symmetrical to the left and the right from the center of the core 10. Cooling water is installed. In addition, the coolant outlets 40 and 40a communicating with the coolant passages 20 positioned at both ends of the core 10 to discharge the coolant passing through the central coolant passage 20 are provided.

One end of the cooling water discharge ports 40 and 40a also extends from both ends of the injection molded product A.

Therefore, the rapid cooling is achieved by passing the cooling water at the lowest temperature from the center of the core 10 having the highest temperature during injection.

The operation of the core cooling structure of the injection mold according to the present invention configured as described above is as follows.

Cooling water supplied through both cooling water supply parts 30 and 30a of the injection molded product A is respectively supplied to the cooling water paths 20 symmetrically positioned along the cooling water supply parts 30 and 30a.

The cooling water rising along the cooling water partition 22 of the cooling water path 20 flows downward from the upper end of the cooling water partition 22 and then flows into another cooling water path 20 which is connected to the cooling water path 20, and then, from the center part to the outside of the cooling water path 20. While flowing into the cooling water passage 20, the effect of cooling is increased.

The coolant passing through the coolant passage 20 is disposed at both ends of the core 10 and discharged through the coolant outlets 40 and 40a communicating with the coolant passage 20.

As described above, the shape of the injection molding is left or right mutually symmetrical injection molding starting from the center of the core 10, or in forming the injection molding in the symmetrical direction of the up, down and other directions, the cooling water from the center of the core 10. The supply is made so that the rapid cooling in the form to be discharged to the outside.

In the above description, it should be understood that those skilled in the present invention can only make modifications and changes to the present invention without changing the gist of the present invention as merely illustrative of a preferred embodiment of the present invention.

As described above, in the core cooling structure of the injection mold according to the present invention, by supplying cooling water so as to cool from the center of the core, the left and right sides of the core are cooled to a uniform temperature, and the cooling of the core is quick and uniform. By making it possible to prevent deformation of the product, the take-out cycle time is shortened, and the product production capacity of the mold is significantly improved.

Claims (1)

In the core cooling structure of the injection mold comprising a core having a cooling water passage therein for cooling and curing the injection molding, Cooling water supply unit for supplying a cooling water is provided in communication with each of the two cooling water passages symmetrically to the left and right from the center of the core, respectively, Cooling water outlets are installed in communication with the cooling water passages at both ends of the core to discharge the cooling water passing through the central cooling water passage. A core cooling structure of an injection mold, wherein rapid cooling is performed by cooling with a low temperature cooling water from a central portion of a high temperature core during injection.