KR20000013851U - Injection mold for antenna board of electronic products - Google Patents

Abstract

The present invention relates to an injection mold for an antenna board of an electronic product. Since the conventional antenna board is manufactured in two types to form a screw hole corresponding to the through hole of the chassis, two sets of injection molds are required, and production cost is high. Have.

The injection mold of the present invention has a lower mold and an upper mold forming a cavity, and first and second pins are formed on the divided surface of the lower mold so as to form first and second screw holes of the antenna board. . A core installation space is formed in the divided surface of the upper mold, and the first and second change cores are interchangeably mounted in the core installation space of the upper mold. The first change core provides a cavity capable of forming the first and second threaded holes of the antenna board, the second change core having a first pin in the lower mold to form only the first screw hole of the antenna board. A blocking plate is provided that provides a cavity of a corresponding shape and blocks the flow of molten molding material injected into the fins. Therefore, since two types of antenna boards can be manufactured by selective replacement of the first and second change cores, injection molds can be processed to reduce production costs, and work time due to replacement of molds is greatly shortened. Productivity is improved.

Description

Injection mold for antenna board of electronics

The present invention relates to an injection mold for an antenna board of an electronic product, and more particularly, to an injection mold for allowing two kinds of antenna boards to be injection molded in common.

The chassis of an electronic product such as a video cassette recorder (VCR) or the like is assembled with an antenna board for interconnecting the terminals of the antenna with a modulator or the like, or connecting an audio / video input / output jack. Such a chassis or antenna board is automatically injection molded by an injection molding machine, and injection molding is a product having a predetermined shape and dimension by injecting a molten molding material, for example, a thermoplastic resin, into a cavity of an injection mold. Is to produce.

Referring to the antenna board of the related art based on FIG. 1, 2A and 2B, a window (12) is formed on the back of the chassis 10, the chassis 10 to be adjacent to the window 12 Through holes 14 are formed in the upper surface of the edge. At this time, the position of the through hole 14 is changed according to the chassis 10 and manufactured. For example, the size of the chassis 10 and the position of the window 12 are differently manufactured according to the model of the electronic product. The position of the through hole 14 is appropriately changed to correspond to the type of the electronic product. In the figure, the changed position of the through hole 14 is shown by an imaginary line.

Meanwhile, the antenna board 20 is installed in the window 12 of the chassis 10, and the screw holes 22 are formed in the upper portion of the antenna board 20 so as to correspond to the through holes 14 of the chassis 10. The screw 16 is fastened to the screw hole 22 through the through hole 14. That is, the screw hole 22 is formed to have first and second distances L1 and L2 at the center of the antenna board 20. Therefore, with the antenna board 20 positioned in the window 12 of the chassis 10, the screw 16 in the screw hole 22 of the antenna board 20 through the through hole 14 of the chassis 10. ), The antenna board 20 is firmly installed in the window 12 of the chassis 10.

By the way, since the conventional antenna board 20 as described above is produced by injection molding of resin as a material, there is a problem of increasing the production cost. That is, in order to perform injection molding on the antenna board 20 in which the screw holes 22 are differently positioned by the first and second distances L1 and L2, the structure of the injection mold corresponds to the position of the screw holes 22. Since it must be manufactured, two sets of injection molds are required, which increases the manufacturing and management costs of the injection molds. In addition, since the replacement of the injection mold, which is performed for injection molding the respective antenna boards 20, is performed as a whole, there is a problem that productivity is lowered, such as a delay in working time.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to share the injection mold by a simple structure to reduce the production cost, as well as to improve the antenna of the electronic product To provide an injection mold for a board.

1 is a perspective view illustrating a state in which an antenna board is installed in a chassis in a general electronic product;

2a and 2b is a front view showing an antenna board of a conventional electronic product,

3a and 3b is a front view showing the antenna board injection molded by the injection mold according to the present invention,

4a and 4b is a plan view and a bottom view showing the lower and upper molds in the injection mold according to the present invention,

5a and 5b is a cross-sectional view showing a state that is injection molded by the first change core in the injection mold according to the present invention,

5C is a partial cross-sectional view of the antenna board injection molded by FIGS. 5A and 5B;

6a and 6b is a cross-sectional view showing a state that is injection molded by the second change core in the injection mold according to the present invention,

FIG. 6C is a partial cross-sectional view of the antenna board injection molded by FIGS. 6A and 6B.

♣ Explanation of symbols for the main parts of the drawing ♣

10: chassis 14: through hole

30: antenna board 34, 36: first and second screw holes

40: injection mold 50: lower mold

54, 56: first and second pins 60: upper mold

64: core installation space 70, 82, 92: cavity

80, 90: first and second change core 94: blocking plate

A feature of the present invention for achieving the above object is that the first and the second distance of the first and second distance with respect to the center thereof so as to fasten the screw through the through hole formed in the chassis of the electronic product An injection mold for injection molding an antenna board having a screw hole, the injection mold comprising: a lower mold having first and second pins formed on a divided surface thereof to form first and second screw holes of the antenna board; An upper mold which is combined with the lower mold to form a cavity capable of injection molding the antenna board, the core mold having a core installation space formed on a divided surface corresponding to the first and second pins; The present invention relates to an injection mold for an antenna product for electronics, comprising a first change core that is replaceably mounted in a core installation space of an upper mold and provides a cavity capable of forming first and second screw holes of an antenna board.

Another feature of the present invention is an antenna board having a first and a second screw hole of a first and a second distance with respect to the center thereof so as to fasten the screw through a through hole formed in the chassis of the electronic product. An injection mold for injection molding, comprising: a lower mold having first and second pins formed on a divided surface thereof so as to form first and second screw holes of an antenna board; An upper mold which is combined with the lower mold to form a cavity capable of injection molding the antenna board, the core mold having a core installation space formed on a divided surface corresponding to the first and second pins; An electronic product comprising a second change core which is replaceably mounted in the core installation space of the upper mold and provides a cavity having a shape corresponding to the first pin of the lower mold so as to form only the first screw hole of the antenna board. It is in the injection mold for antenna board.

Hereinafter, a preferred embodiment of an injection mold for an antenna board of an electronic product according to the present invention will be described in detail with reference to the accompanying drawings.

3A and 3B to 6C are views illustrating an injection mold for an antenna board of an electronic product according to the present invention, and the basic configuration of the chassis described with reference to FIG. 1 will be described with the same reference numerals.

First, as shown in FIGS. 3A and 3B, an extension piece 32 is formed on an upper side of the antenna board 30, and the extension piece 32 forms first and second distances L1 and L2. First and second screw holes 34 and 36 are formed, respectively. At this time, the second screw hole 36 is selectively formed as necessary in injection molding. That is, since the second screw hole 36 must be formed to correspond to the through hole 14 of the chassis 10 described with reference to FIG. 1, the second screw hole 36 is formed through the through hole 14 of the chassis 10. The first screw holes 34 of the antenna board 30 are not formed when they correspond.

As shown in FIGS. 4A and 4B, the injection mold 40 used for the injection molding of the antenna board 30 has a pair of the lower mold 50 and the upper mold 60 on the divided surfaces 52 and 62. It is configured to combine to form the cavity 70. That is, in the injection mold 40, the cavity 70 is formed on the divided surfaces 52 and 62 of the lower mold 50 and the upper mold 60, and the lower mold 50 and the upper mold 60 are formed. By injecting the molten molding material into the cavity 70 formed by the combination, the antenna board 30 having a predetermined shape and dimension is injection molded.

Meanwhile, as shown in FIGS. 4B, 5A, and 5B, the first and second screw holes 34 and 36 of the antenna board 30 may be formed in the dividing surface 52 of the lower mold 50. First and second fins 54 and 56 are formed, and a core installation space 64 is formed in the divided surface 62 of the upper mold 60. In the core installation space 64 of the upper mold 60, first and second change cores for selectively forming the first and second screw holes 34 and 36 of the antenna board 30 as necessary. cores 80, 90) are interchangeably mounted.

That is, as shown in FIGS. 5A and 5B and 6A and 6B, each of the first and second change cores 80 and 90 can be selectively replaced with the core installation space 64 of the upper mold 60. The first change core 80 provides a cavity 82 having a shape corresponding to the first and second pins 54 and 56 of the lower mold 50. 90 provides a cavity 92 of a shape corresponding to the first pin 54 of the lower mold 50 so that only the first screw hole 34 of the antenna board 30 can be formed. In addition, a blocking plate 94 is formed in the cavity 92 of the second change core 90 to block the flow of the molten molding material injected into the second pin 56 of the lower mold 50.

Referring to the injection molding state of the injection mold for the antenna board of the electronic product according to the present invention as described above are as follows.

First, injection molding of the antenna board 30 is performed by an injection molding machine (not shown). The mold base of the injection molding machine is configured such that a pair of fixed and movable templates can be divided, and the lower mold 50 and the upper mold 60 are respectively attached to the fixed and movable templates.

As shown in FIGS. 5A, 5B, and 5C, the first and second distances L1 and L2 constituting the first and second distances L1 and L2, which are different from each other with respect to the center thereof, on the extension piece 32 of the antenna board 30. When the second screw holes 34 and 36 are formed, the first change core 80 is provided in the core installation space 64 of the upper die 60. In such a state, when the lower mold 50 and the upper mold 60 are closed such that the divided surfaces 52 and 62 of the lower mold 50 and the upper mold 60 are in contact with each other, the combination of these can be removed. A butt 70 is formed.

In addition, the first change core 80 may include a cavity (ie, the first change core 80) to form the first and second threaded holes 34 and 36 corresponding to the first and second pins 54 and 56 of the lower mold 50. 82). Subsequently, when the molten molding material is injected into the cavities 70 and 82 through the heating cylinder of the injection molding machine, the first and second screw holes 34, The antenna board 30 having the 36 can be injection molded. In this case, the antenna board 30 may be removed from the cavities 70 and 82 by the ejection mechanism of the injection molding machine when the lower mold 50 and the upper mold 60 are opened.

Meanwhile, after the antenna board 30 is positioned in the window 12 of the chassis 10 described with reference to FIG. 1 so that the through hole 14 and the second screw hole 36 coincide with each other, the through hole of the chassis 10 ( When the screw 16 is fastened to the second screw hole 36 of the antenna board 30 through 14, the chassis 10 and the antenna board 30 are firmly assembled. At this time, the first screw hole 36 is not in use.

6A, 6B, and 6C, when only the first screw hole 34 is formed in the extension piece 32 of the antenna board 30, the core mounting hole 64 of the upper die 60 is formed. The second change core 90 is installed on the wall. In such a state, when the lower mold 50 and the upper mold 60 are closed such that the divided surfaces 52 and 62 of the lower mold 50 and the upper mold 60 are in contact with each other, the combination of these can be removed. A butt 70 is formed.

In addition, the second change core 90 provides the cavity 92 so that only the first screw hole 34 can be formed corresponding to the first pin 54 of the lower mold 50. The blocking plate 94 of the core 90 blocks the second pin 56 side of the lower mold 50. Subsequently, when the molten molding material is injected into the cavities 70 and 92 through the heating cylinder of the injection molding machine, the antenna having the first screw hole 34 corresponding to the shape of the cavities 70 and 92. The board 30 can be injection molded.

That is, the molten molding material injected into the cavities 70 and 82 is blocked from flowing toward the second pin 56 of the lower mold 50 by the blocking plate 94 of the second change core 90. Only the first screw hole 34 is injection molded by the pin 54 and the corresponding cavity 92. In addition, the antenna board 30 may be removed from the cavities 70 and 92 by the ejection mechanism of the injection molding machine when the lower mold 50 and the upper mold 60 are opened.

Meanwhile, after the antenna board 30 is positioned in the window 12 of the chassis 10 described with reference to FIG. 1 so that the through hole 14 and the first screw hole 34 coincide with each other, the through hole of the chassis 10 When the screw 16 is fastened to the first screw hole 34 of the antenna board 30 through 14, the chassis 10 and the antenna board 30 are firmly assembled.

As such, the extension pieces 32 of the antenna board 30 may be provided by selective replacement of the first and second change cores 80 and 90 to correspond to the positions of the through holes 14 formed in the chassis 10. Since the first and second threaded holes 34 and 36 can be formed or only the first threaded hole 34 can be injection molded, a set of injection molds 40 can be shared to greatly reduce the manufacturing and maintenance costs of the molds. And consequently lower production costs. In addition, the replacement of the injection mold 10, which is performed for injection molding the antenna board 30, can improve productivity, such as greatly reducing the working time due to the replacement of the first and second change cores 80 and 90. Will be.

The above-described embodiments are merely illustrative of preferred embodiments of the present invention, and the scope of application of the present invention is not limited thereto, and may be appropriately changed within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified. In addition, the present invention is widely applicable to forming holes in various chassis, panels, etc. in addition to the injection molding of the antenna board.

As described above, according to the injection mold for an antenna board of an electronic product according to the present invention, since two types of antenna boards can be manufactured by the selective replacement of the first and second change cores, the injection mold is processed to produce a mold. Not only can the cost be reduced, but the productivity time is greatly shortened due to the replacement of the mold.

Claims (3)

An injection mold for injection molding an antenna board having first and second screw holes of first and second distances different from each other with respect to a center thereof so that the screw can be fastened through a through hole formed in a chassis of an electronic product. , Lower mold 50 having first and second pins 54 and 56 formed on the split surface 52 so as to form first and second screw holes 34 and 36 of the antenna board 30. and; The dividing surface 62 corresponding to the first and second pins 54 and 56 by forming a cavity 70 which is combined with the lower mold 50 to injection-mold the antenna board 30. An upper mold 60 in which a core installation space 64 is formed; A cavity 82 which is replaceably mounted in the core installation space 64 of the upper mold 60 and which can form the first and second screw holes 34 and 36 of the antenna board 30 is provided. Injection mold for antenna board of electronics which consists of the 1st change core 80 to provide. An injection mold for injection molding an antenna board having first and second screw holes of first and second distances different from each other with respect to a center thereof so that the screw can be fastened through a through hole formed in a chassis of an electronic product. , Lower mold 50 having first and second pins 54 and 56 formed on the split surface 52 so as to form first and second screw holes 34 and 36 of the antenna board 30. and; The dividing surface 62 corresponding to the first and second pins 54 and 56 by forming a cavity 70 which is combined with the lower mold 50 to injection-mold the antenna board 30. An upper mold 60 in which a core installation space 64 is formed; The first pin of the lower mold 60 is mounted so as to be replaceable in the core installation space 64 of the upper mold 60 and to form only the first screw hole 34 of the antenna board 30. An injection mold for an antenna board for an electronic product, comprising a second change core (90) providing a cavity (92) of a shape corresponding to (64). The electronic device of claim 2, wherein the cavity 92 of the second change core 90 is provided with a blocking plate 94 that blocks the flow of molten molding material injected into the second fin 66. Injection mold for antenna board.