KR20110129737A - A injection molding system and method and an electronic product housing produced by the said system and method - Google Patents

Abstract

PURPOSE: An insert injection system, an insert injection method, and a housing for an electronic product produced using the same are provided to reduce manufacturing costs by inserting glass windows having various thicknesses. CONSTITUTION: An insert injection system comprises an upper mold(10), a lower mold(20), a sliding core(30), and a drive unit(50). A cavity is formed by the upper and lower molds. Molten resin for molding a housing is injected into the formed cavity. A glass window is placed on the sliding core. The sliding core is installed in the lower mold and is slid into or out of the cavity. The drive unit moves the sliding core vertically. When the injected molten resin is insert-molded, the drive unit supports the sliding core to prevent downward movement.

Description

A injection molding system and method and an electronic product housing produced by the said system and method}

The present invention relates to an insert injection system, an insert injection method, and a housing for an electronic product produced using the same. More specifically, the window glass can be integrally injection molded into various housings of an electronic product such as a portable terminal and a notebook computer. The present invention relates to an insert injection system, an insert injection method, and a housing for electronic products produced using the same.

In general, a portable terminal such as a mobile phone or a laptop is provided with a small camera called a cam (cam) for the electronic device, the camera window is installed in the case to secure the front view of the cam.

1 is a schematic diagram of a window installed in a conventional mobile phone. Referring to Figure 1, the rear cover 100 of the conventional mobile phone is provided by a method such as injection molding.

Here, the window cover 110, the decor 120 and the camera pad 140 to be attached to the rear cover 100 is molded so that the tape 111 is coupled.

Deco 120 is configured such that the window glass 110 is attached to the inside is coupled to the rear cover 100 by a predetermined bonding means or coupling means.

The window glass 110 is attached to the rear cover 100 by using a tape 111 or the like as an adhesive means, and the mounting of the window glass 110 is completed by combining the above-described decor 120.

In the same way, notebook computers are equipped with a window glass for cameras.

By the way, there was a problem that the manufacturing process is complicated by such a method, and after the rear cover 100 is molded, the window glass 110 is bonded using the tape 111 to increase the defective rate and lower the yield. There was this.

Accordingly, a method of injection molding a window glass using a conventional insert injection system has been proposed.

2 is a process chart using a conventional insert injection method. Referring to FIG. 2, an upper mold 130 and a lower mold 140 having a cavity in which a rear cover for a mobile phone is to be formed are prepared.

Then, the window glass 110 is seated on the lower mold 140 and the upper mold 130 is moved downward to close the mold.

At this time, when the thickness of the window glass 110 is greater than the thickness of the cavity, the window glass 110 is partially broken, and when the thickness of the window glass 110 is smaller than the thickness of the cavity, the molten resin is a window. There was a problem of covering the entire upper portion of the glass (110).

To this end, there may be a method for preparing and inserting the upper mold 130 according to the thickness of the window glass 110 to be inserted into the insert injection, but because the upper mold must be prepared separately for each window glass to increase the manufacturing cost. There was a problem that brought about.

In addition, there was a difficulty in installing the upper mold according to the window glass to be inserted every time injection molding, there was a problem that the process time is increased to decrease the hourly yield.

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems as described above, and to provide an insert injection system and an insert injection method capable of insert injection of window glass having various thicknesses.

In addition, the present invention provides an insert injection system and an insert injection method capable of improving yields by preventing window glass from being damaged even when inserting window glasses having various thicknesses.

In addition, the present invention provides an insert injection system and an insert injection method which can reduce manufacturing costs by not having to separately manufacture a mold according to the thickness of the window glass applied to each product by inserting window glasses having various thicknesses.

In addition, there is no need to separately manufacture the mold for each product, there is no need to reinstall the mold for each product to provide an insert injection system and insert injection method that can reduce the process time.

In addition, since the window glass is integrally formed in the housing, a process of separately manufacturing the window glass and attaching it to the housing can be omitted, and an insert injection system capable of reducing manufacturing cost since no adhesive means for attaching the window glass is required. It is to provide an insert injection method.

In addition, by using the insert injection system and the insert injection method described above to provide a case for a mobile phone, a deco for a mobile phone (deco) or a notebook case that is a housing for electronic products integrally formed with a window glass.

According to an embodiment of the present invention, in the insert injection system for inserting the window glass by injection molding during the molding of the housing for electronic products, forming a cavity (molity) is injected into the molten resin for molding the housing An upper mold and a lower mold that are provided to make; A sliding core is mounted on the upper portion of the window glass, the sliding core is installed in the lower mold to slide in and out of the cavity; It is achieved by an insert injection system comprising a; driving unit to move in the vertical direction of the sliding core, the molten resin is injected so that the sliding core does not move downward during injection molding.

Here, a mounting portion recessed to allow the window glass to be seated may be formed on an upper surface of the sliding core.

In addition, the side wall surface of the seating portion may be formed to be inclined with the bottom surface to guide the window glass.

In addition, the bottom surface of the seating portion is formed with an adsorption hole in communication with the outside, it may further include an adsorber coupled to the adsorption hole to adsorb the window glass when seated on the sliding core.

In addition, the side surface of the window glass may be micro blasted (micro blasting).

The upper mold may further include heating means for heating the molten resin injected into the edge of the window glass in a direction facing the window glass.

On the other hand, the drive unit may include a drive motor unit for driving the sliding core in the vertical direction, and a constant pressure circuit unit for supporting the sliding core at a constant pressure by using a hydraulic pressure from the bottom when forming the injected molten resin.

According to another embodiment of the present invention, in the injection molding method of inserting the window glass by injection molding when forming a housing for an electronic product, an upper mold provided to form a cavity for forming the housing and Preparing a lower mold and moving the sliding core of the lower mold downward; A seating step of preparing a window glass and placing the window glass on the seating part of the sliding core while allowing the window glass to be adsorbed to the seating part through an adsorber; A sliding core moving step of closing the upper mold and the lower mold and moving the sliding core upward so that the upper surface of the window glass contacts the upper inner surface of the upper mold; A molding step of molding the housing by injecting molten resin into the cavity while supporting the sliding core at a lower portion through a driving unit; It is achieved by the insert injection method comprising a; taking out the housing to which the window glass is inserted by opening the upper mold and the lower mold.

Here, the side surface of the window glass prepared in the seating step is preferably prepared by blasting (blasting).

In addition, the molten resin is injected after the forming step or at the same time, and the molten resin injected to cover the upper portion of the edge and the molten resin injected into the edge side of the window glass of the molten resin injected through the heating means of the upper mold It may further comprise a heating step of heating.

In addition, the housing for an electronic component produced using the insert injection system or the insert injection method described above may be any one of a deco of a portable terminal, a rear case of a portable terminal, or a case for a laptop.

According to the present invention, there is provided an insert injection system and an insert injection method capable of insert injection of window glass of various thicknesses.

In addition, there is provided an insert injection system and an insert injection method capable of improving yield by preventing window glass from being broken even when inserting window glasses having various thicknesses.

In addition, by inserting a window glass of various thicknesses there is provided an insert injection system and insert injection method that can reduce the manufacturing cost without having to separately manufacture a mold according to the thickness of the window glass applied to each product.

In addition, there is provided an insert injection system and an insert injection method capable of shortening the process time by not having to reinstall a mold for each product by not separately manufacturing a mold for each product.

In addition, since the window glass is integrally formed in the housing, a process of separately manufacturing the window glass and attaching it to the housing can be omitted, and an insert injection system capable of reducing manufacturing cost since no adhesive means for attaching the window glass is required. An insert injection method is provided.

In addition, there is provided a case for a mobile phone, a deco for a mobile phone or a case for a notebook, which is a housing for an electronic product in which a window glass is integrally formed using the insert injection system and the insert injection method described above.

1 is a schematic diagram of a window installed in a conventional mobile phone,
2 is a process chart using a conventional insert injection method,
3 is a schematic view of an injection system according to an embodiment of the present invention;
4 is an enlarged view of the sliding core of FIG.
5 and 6 are detailed views of the driving unit of FIG.
7 is an algorithm of the insert injection method according to another embodiment of the present invention,
8 to 12 are schematic process diagrams according to the algorithm of FIG.

Prior to the description, in various embodiments, components having the same configuration will be representatively described in one embodiment using the same reference numerals, and other embodiments will be described with respect to components different from the one embodiment.

Hereinafter, an insert injection system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic diagram of an injection system according to an embodiment of the present invention. Referring to FIG. 3, the insert injection system according to the exemplary embodiment of the present invention may include an upper mold 10, a lower mold 20, an adsorber 40, a driver 50, and a controller 60. have.

In the upper mold and the lower mold shown, the gate into which the molten resin is injected is omitted for convenience of description.

The upper mold 10 has a cavity 11 for forming a housing for an electronic product therein, and molten resin is injected therein.

In this embodiment, the cavity 11 is formed in the upper mold 10, but the cavity 11 may be formed in either the upper mold 10 or the lower mold 20, and the two molds partially. It may be formed to be formed when the two molds abut and close the mold.

In addition, the housing for an electronic product in the present exemplary embodiment may be a deco coupled to a rear case of a portable terminal, a laptop case, or a rear case of a portable terminal.

And, inside the upper mold 10 may be provided with a heating means 12 such as a heater (heater) is applied by the power is applied by the control unit 60 to be described later.

At this time, the position of the heating means 12 is preferably installed to face the window glass (70 of FIG. 9) which is seated on the sliding core 30 to be described later.

The heating means 12 may be installed to heat the molten resin injected to cover the side edges and the upper edge of the window glass 70.

That is, the molten resin bonded to the upper and side surfaces of the edge of the window glass 70 is a thin molding having a small thickness, and is a portion that is thinly formed through the heating means 12, that is, the edge side of the window glass 70. And by further heating the portion covering the upper portion, the molten resin can be better bonded to the window glass 70.

In this case, the side surface of the window glass 70 may be ground and inserted into shot blasting or sand blasting in advance in order to improve the bonding degree of the molten resin.

The lower mold 20 is installed to face the upper mold 10 and is provided to be driven in the vertical direction by the controller 60 to be described later.

That is, when the lower mold 20 moves upward, the upper mold 10 and the lower mold 20 come into contact with each other to close the mold while closing the mold 11.

At this time, at least one sliding core 30 slidingly moves upward and downward by the driving unit 50 to be described later may be installed inside the lower mold 20.

Although the lower mold 20 is driven and the upper mold 10 is fixed in this embodiment, the lower mold 20 is fixed and the upper mold 10 may be installed to drive the upper mold. Both the 10 and the lower mold 20 may be installed to be driven.

4 is an enlarged view of the sliding core of FIG. 3. Referring to FIG. 4, the sliding core 30 may have a recessed portion 31 in which the window glass 70 is seated on an upper surface thereof.

The bottom surface 31a of the seating portion 31 is formed with an adsorption hole 32 to which the adsorber 40 to be described later is connected, and the side wall surface 31b of the seating portion 32 is inclined so that the bottom surface 31a is inclined. It may be formed to be inclined with respect to.

Through this, the window glass 70 may be guided by the side wall surface 31b and adsorbed through the adsorption hole 32 to be stably seated on the seating part 31.

In addition, the seating position of the window glass 70 may be determined according to the position of the suction hole 32 formed in the bottom surface 31a.

The adsorber 40 is provided as a predetermined air suction device provided to suck air and is coupled to an outer end of the adsorption hole 32. When the window glass 70 sucks air downward through the adsorption hole 32 when the window glass 70 is seated on the seating portion 32 through the adsorber 40, the window glass 70 may be stablely seated.

5 and 6 are detailed views of the driving unit of FIG. 3. 5 and 6, the driving unit 50 may include a direction change valve 51 and a constant pressure circuit unit 52.

The direction change valve 51 is directly coupled to one side of the sliding core 30 described above, or a predetermined interlocking means interposed therebetween according to the left and right movement direction of the direction switching valve 51. Up and down driving direction of the sliding core 30 can be determined.

The constant pressure circuit unit 52 includes a main valve 52a, a pressure control valve 52b, a flow control valve 52c, and a motor pump 52d, and may be controlled by the controller 60 to be described later. .

The flow rate introduced from the tank through the motor pump 52d flows in by the flow rate control valve 52c, and is controlled by a constant hydraulic pressure through the pressure control valve 52b.

That is, the fluid controlled at a constant pressure by the pressure control valve 52b allows the driving force of the direction change valve 51 to be maintained to the right through the main valve 52a.

If the flow rate is excessively introduced by the flow path, an overload fluid pressure is generated, and the fluid above the set pressure is controlled to be sent to the tank as the overload pressure.

That is, as shown in FIG. 5, assuming that the sliding core 30 moves upward by moving the protrusion of the directional valve 51 to the right, the static pressure circuit unit 52 as described above in this state. The sliding core 30 can be supported by the constant pressure.

On the other hand, in order to drive the sliding core 30 downward, as shown in FIG. The sliding core 30 can be driven downward by moving the main valve 52a to the left to switch the flow path direction and moving the protrusion of the direction switching valve 51 to the left.

The controller (60 of FIG. 3) is a means for controlling the above-described upper mold 10, the heating means 12, the adsorber 40 and the driving unit 50 according to the corresponding process, a predetermined program to control the respective components. This may be installed.

Meanwhile, the molten resin may be provided to be injected into the cavity 11 through a resin injector (not shown) in which a predetermined thermoplastic material is melted.

Next, an insert injection method will be described as another embodiment of the present invention. In this embodiment, for the sake of understanding, the above-described insert injection system will be described.

7 is an algorithm of the insert injection method according to an embodiment of the present invention, Figures 8 to 12 is a schematic process diagram according to the algorithm of FIG.

Referring to Figure 7, the insert injection method according to an embodiment of the present invention, the preparation step (S10), the seating step (S20), the sliding core moving step (S30), the forming step (S40), take-out step (S50) It is configured to include.

First, as shown in FIG. 8, a cavity 11 for forming a housing for an electronic product is formed, an upper mold 10 provided with a heating means 12 therein, and a lower portion provided with a sliding core 30. The mold 20 is prepared and installed to face each other, and the sliding core 30 of the lower mold 20 is moved downward through the control unit 60 (S10).

And, as shown in FIG. 9, while preparing the window glass 70 and placing it on the seating portion 31 of the sliding core 30, the window glass 70 is seated through the adsorber 40. (S20).

At this time, the side surface of the prepared window glass 70 may be prepared by grinding by short blasting or sand blasting.

Subsequently, as shown in FIG. 10, the lower mold 10 is driven upward to close the mold by bringing the upper mold 10 and the lower mold 20 into contact with each other, and as shown in FIG. 11, the driving unit 50. The sliding core 30 is moved upwardly such that the upper surface of the window glass 70 contacts the upper inner surface of the upper mold 10 through (S30).

As shown in FIG. 12, the molten resin 80 is injected into the cavity 11 in a state in which the sliding core 30 is supported at a lower pressure through the driving unit 50 at a lower portion thereof to form a housing for an electronic product. (S40).

Subsequently, as shown in FIG. 13, the molten resin 80 injected into the upper side of the edge and the molten resin 80 injected into the side of the edge of the window glass 70 is injected. It heats through the heating means 12 of the metal mold | die 10 (S50).

The heating means 12 may be heated before or at the same time as the injection of the molten resin 80 or after the injection is completed, as necessary.

When the molding is completed after a certain time, the lower mold 10 is driven to separate the upper mold 10 and the lower mold 20, and the window glass 70 is removed to take out the housing for the electronic product. Complete the step (S60).

According to the insert injection system or the insert injection method as described above, by manufacturing the housing for the electronic product is inserted into the window glass, it is possible to innovatively improve the number of processes, process time and manufacturing cost compared to the prior art.

The scope of the present invention is not limited to the above-described embodiment, but may be embodied in various forms of embodiments within the scope of the appended claims. Without departing from the gist of the invention claimed in the claims, it is intended that any person skilled in the art to which the present invention pertains falls within the scope of the claims described in the present invention to various extents which can be modified.

※ Explanation of code for main part of drawing ※
10: upper mold 11: cavity 12: heating means
20: lower mold 30: sliding core 31: seating portion
32: adsorption hole 40: adsorber 50: drive unit
51: constant voltage circuit 52: drive motor 60: control unit
70: window glass 80: molten resin

Claims (12)

In the injection molding system for inserting the window glass by injection molding the housing for electronics,
Upper and lower molds formed to form a cavity into which a molten resin is injected to mold the housing;
A sliding core is mounted on the upper portion of the window glass, the sliding core is installed in the lower mold to slide in and out of the cavity;
And a driving unit which moves in the vertical direction of the sliding core and supports the sliding core so that the sliding core does not move downward when the molten resin is injected and injection molding is carried out. The method of claim 1,
Insert injection system, characterized in that the upper surface of the sliding core is formed with a recess recessed so that the window glass is seated. The method of claim 2,
And the side wall surface of the seating portion is inclined with the bottom surface to guide the window glass. The method of claim 3, wherein
The bottom surface of the seating portion is formed with adsorption holes in communication with the outside, the insert injection system characterized in that it further comprises an adsorber coupled to the adsorption hole to adsorb the window glass when seated on the sliding core. The method of claim 1,
Insert injection system, characterized in that the side of the window glass is micro blasted (micro blasting). The method of claim 1,
The upper mold further comprises a heating means for heating the molten resin injected into the edge of the window glass in the opposite direction of the window glass. The method of claim 1,
The driving unit, and the direction switching means coupled to the sliding core, and determines the moving direction of the direction changing means so that the vertical movement direction of the sliding core and the positive pressure using the hydraulic pressure to the changed direction of the direction changing means Insert injection system comprising a constant pressure circuit to support the. In the injection molding method of the injection molding by inserting the window glass when molding the housing for electronic products,
Preparing an upper mold and a lower mold provided to form a cavity for forming the housing, and preparing the lower mold to move the sliding core downward;
A seating step of preparing a window glass and placing the window glass on the seating part of the sliding core while allowing the window glass to be adsorbed to the seating part through an adsorber;
A sliding core moving step of closing the upper mold and the lower mold and moving the sliding core upward so that the upper surface of the window glass contacts the upper inner surface of the upper mold;
A molding step of molding the housing by injecting molten resin into the cavity while supporting the sliding core at a lower portion through a driving unit;
And a take-out step of taking out the housing in which the window glass is inserted by opening the upper mold and the lower mold. The method of claim 8,
Insert injection method, characterized in that the side of the window glass prepared in the seating step is prepared by blasting (blasting). The method of claim 8,
After the forming step or at the same time, the molten resin injected to cover the upper portion of the edge and the molten resin injected to the edge side of the window glass of the injected molten resin is heated through the heating means of the upper mold Insert injection method characterized in that it further comprises a heating step. A housing for an electronic product produced using the insert injection system according to claim 1 or the insert injection method according to claim 8. 12. The method of claim 11,
The electronics housing is an insert injection system, characterized in that any one of a deco (deco) of the portable terminal, a rear case (rear case) of the portable terminal or a case for a laptop.

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