KR100462106B1 - Double injection-molding button of the heater control part of the car and The producing method the same - Google Patents

Abstract

The present invention relates to a double injection button and a manufacturing method of the automobile heater control unit,

A primary resin portion which protrudes from a surface of the shaped portion for displaying the function of the button, and bridge holes are formed in portions adjacent to the inner and outer sides of the shaped portion;

In the double injection button comprising a secondary resin portion having a protrusion to be fitted to the bridge hole, covering the surface of the inner and outer portions of the shape portion to the same thickness as the height of the shape portion, and coupled to the primary resin portion,

By manufacturing a double injection button of the automobile heater control unit so that at least one coupling hole is formed in the primary resin portion inside the shape portion, and the secondary resin portion has a reinforcement protrusion that is fitted into and fixed to the coupling hole.

By eliminating the influence of the bridge portion on the shape portion of the primary resin portion to which the light of the light source is projected, there is an effect that the shape of the functional display portion can be made clearer and the button having a beautiful appearance.

Description

Double injection-molding button of the heater control part of the car and The producing method the same}

The present invention relates to a double injection button and a method of manufacturing the same, in particular to form a coupling hole in the shape of the primary resin portion to display the function of the button, the secondary resin is introduced into the coupling hole to form a reinforcement protrusion The present invention relates to a double injection button of an automobile heater control unit and a manufacturing method thereof.

The heater control unit of the vehicle is a device that controls and regulates air conditioning (A / C), heating (HEATER), or a ventilator to keep the interior of the vehicle comfortable. Such a heater control part is equipped with a plurality of buttons on which a shape part indicating a function such as air conditioning and the like is displayed.

The heater control unit (not shown) is composed of a PCB substrate equipped with an LED and a light source connected to a heating and cooling device, and a button lens, a button guide, a button, and the like sequentially mounted on the light source. The shape shown is shown. Since light from the light source mounted on the PCB substrate under the button is diffused through the button lens and transmitted to the shape of the button, the button can be easily identified at night.

The button of the conventional heater control unit is manufactured by injection molding a resin of a material which diffuses light to manufacture a button body, and then spraying an opaque material on the surface thereof and laser cutting the material to form a shape. (See Figure 1). However, the buttons manufactured in this manner were often corroded or peeled off by the user's sweat or foreign matter or heat transmitted from the lower part of the heater control part, and thus, the shape parts were often damaged as shown in FIG. 1.

In order to compensate for this disadvantage, a double injection button as shown in FIG.

The double injection button of Figure 2, the injection molding resin of the material to diffuse the light to form a primary resin portion 10, the injection molding the secondary resin of opaque material on the surface of the primary resin portion 10 It is manufactured in such a manner that the secondary resin portion 20 is formed. On the surface of the primary resin portion 10, a shape portion 11 (for example, a shape such as A or A / C representing an air conditioner) is formed on the surface of the primary resin portion 10, and the secondary resin portion 20 is formed. The surface of the primary resin part 10 is surrounded by the same thickness as the height of the shape part 11. On the other hand, when the closed part shape (for example, A part of A) is included in the shape part 11, so-called bridge hole 12 is formed in the inner and outer side of the closed curved part of the primary resin part 10, and the secondary The resin is allowed to flow into the closed curve shape through the bridge hole 12 (see FIG. 3).

However, in the case of the double injection button, the secondary resin portion inside and outside the shape portion 11 is introduced into the bridge hole 12 under the shape portion 11 of the primary resin portion 10 adjacent to the bridge hole 12. A bridge 21 connecting the 20 is formed, thereby preventing the light transmitted from the light source from being transmitted to the shape portion 11.

Therefore, as shown in FIG. 3, the shape of the shape portion 11 that is visible to the naked eye (that is, the shadow of the bridge portion 21) becomes shadowed, and thus the shape of the shape portion 11 becomes unclear, and it is also good to see in appearance. not.

Therefore, in the manufacture of the double injection button, a finishing step of removing the lower end 21a of the bridge portion 21 is additionally required.

However, when the lower end 21a of the bridge portion 21 is completely removed by the finishing process, the secondary resin portion 20 formed inside the closed curve shape is separated from the secondary resin portion 20 outside the closed curve shape. There is a risk of falling out. Therefore, in order to avoid this, the bridge portion 21 has to be partially mapped so that a part of the lower end portion 21a of the bridge portion 21 is caught by the inner wall of the primary resin portion 10 as shown in FIG. 4A. However, even if the bridge portion 21 is partially mapped in this way, the problem of shading on the shape portion 11 due to the influence of the lower end portion 21a of the bridge portion 21 cannot be completely solved. In addition, since both protruding portions 21b of the bridge portion 21 are located adjacent to the shape portion 11, there is a problem that the shape of the shape portion 11 is not clearly seen under the influence of both protrusions 21b. .

In order to exclude the influence of the bridge portion 21, as shown in Figure 4b, it may be considered to form the bridge hole 12 spaced apart from the shape portion 11 by a predetermined interval. However, as illustrated in FIGS. 4A and 4B, partially mapping the lower end of the bridge portion 21 is very difficult and takes a lot of time and effort.

The present invention has been made in order to solve the above problems, by forming a coupling hole in the closed curved portion of the primary resin portion, by injection molding the primary and secondary resin parts to form a reinforcement protrusion in the coupling hole The present invention relates to a double injection button of an automobile heater control unit capable of completely removing a lower end portion of a bridge portion that causes shadows on a closed curve shape, and a manufacturing method thereof.

1 is a photograph showing a button of a conventional car heater control unit,

2 is a cross-sectional view of a double injection button of a conventional vehicle heater control unit,

3 is a plan view of the double ejection button of FIG.

4 is a sectional view showing the principal parts of a state after the double injection button of FIG. 2 is mapped;

5 is a cross-sectional view showing a main part showing a process of manufacturing a double injection button of a vehicle heater control unit according to the present invention;

Figure 6 is a sectional view of the main part showing another embodiment of the double injection button of the vehicle heater control unit according to the present invention,

Figure 7 is a schematic configuration diagram of a rotary mold machine is a double injection button injection molding of the present invention.

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

100 ... 1st resin part,

101 ... Bridge Hall,

102 ...

200 ... 2nd resin part,

210 Bridge,

220.Reinforcement protrusion

In order to achieve the above object, the double injection button of the vehicle heater control unit according to the present invention,

A primary resin portion which protrudes from a surface of the shaped portion for displaying the function of the button, and bridge holes are formed in portions adjacent to the inner and outer sides of the shaped portion;

In the double injection button comprising a secondary resin portion having a protrusion to be fitted to the bridge hole, covering the surface of the inner and outer portions of the shape portion to the same thickness as the height of the shape portion, and coupled to the primary resin portion,

One or more coupling holes are formed in the primary resin portion in the shape portion, and the secondary resin portion is provided with a reinforcement protrusion that is fitted into and fixed to the coupling hole.

The diameter of the coupling hole and the thickness of the reinforcement protrusions fitted thereto are preferably larger than the diameter of the bridge hole and the thickness of the protrusions fitted thereto.

In addition, the bridge hole is preferably formed at a position spaced apart from the predetermined portion.

On the other hand, at the end of the reinforcing protrusions may be formed a locking step that is caught on the inner wall of the primary resin portion.

According to the method of manufacturing a double injection button of the present invention, the shape indicating the function of the button is formed on the surface protruding, the bridge hole and one or more coupling holes are formed in the portion adjacent to the inside and outside of the shape and the inside of the shape, respectively Injection-molding the primary resin portion as much as possible;

The secondary resin injected onto the surface of the primary resin portion is introduced into the shape portion and the coupling hole through the bridge hole to cover the surface of the primary resin portion inside and outside the shape portion with the same thickness as the height of the shape portion, Injection molding the secondary resin portion into the bridge hole and the coupling hole to form the bridge portion and the reinforcement protrusion portion, respectively;

It may be configured to include a finishing step to remove the lower end of the bridge portion to separate the secondary resin portion in and out of the shape portion.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention.

The double injection button according to the present invention is injection molded by the so-called rotary mold method. Figure 7 schematically shows the configuration of a rotary mold machine injection molding the double injection button of the present invention.

As shown, the primary mold (I) and the secondary mold (II) connected to the primary resin injection nozzle and the secondary resin injection nozzle, respectively, are mounted on the fixed plate (F). The rotating plate R is equipped with a primary rotary mold I 'and a secondary rotary mold II' so as to be in contact with the primary and secondary molds I and II, respectively.

The process of injection molding the double injection button in the rotating mold is as follows.

First, when the primary resin is injected from the primary resin injection nozzle into the primary rotational mold (I ') through the primary mold (I), the primary resin portion 100 is formed in the primary rotational mold (I'). Injection molded.

After that, when the rotating plate R rotates, the primary rotating mold I 'comes to the position of the secondary rotating mold II', and comes into contact with the secondary mold II mounted to the fixed plate F. . At this time, secondary resin is injected from the secondary resin injection nozzle into the primary rotating mold (II) through the secondary mold (II), and the secondary resin portion 200 is formed on the surface of the primary resin portion 100. Injection molded. On the other hand, the secondary rotating mold (II ') is brought into contact with the primary mold (I) by the rotation of the rotating plate (R), and the primary resin portion 100 is injection molded in the secondary rotating mold (II'). . As described above, the rotary mold machine rotates the primary and secondary rotary molds (I 'and II') by the rotating plate, thereby continuously double-molding the button of the automobile heater control unit.

In the first rotational mold (Ⅰ), the injection molding is completed, the double injection button is separated from the rotational molding machine and subjected to finishing process such as finishing process.

5 is a sectional view showing the main part of the process of manufacturing a double injection button of the vehicle heater control unit according to the present invention, Figure 6 is a sectional view of the main part showing another embodiment of the present invention.

FIG. 5A is a view showing a cross section of a main portion of the primary resin portion 100 injection molded in the primary rotational mold (I '). 110 is a shape indicating the function of the button, 101 is a bridge hole, 102 is a coupling hole. The diameter of the coupling hole 102 is formed larger than the diameter of the bridge hole 101, the bridge hole 101 is spaced apart from the shape portion 110 by a predetermined interval on the inside and outside of the shape portion 110 forming a closed curve It is formed at the position.

FIG. 5B is a view showing that the secondary resin is injected into the primary rotational mold (I '), and the secondary resin portion 200 is formed on the surface of the primary resin portion 100. The secondary resin injected onto the surface of the primary resin part 100 flows into the bridge hole 101 to form the bridge part 210 and at the same time flows into the closed curve shape part 110. The secondary resin injected onto the surface of the primary resin part 100 may have the same thickness as that of the height of the shape part 110 of the primary resin part 100 so as to form the surface of the primary resin part 100 inside and outside the shape part 110. Covered. In addition, the secondary resin introduced into the closed curve portion 110 is introduced into the coupling hole 102 formed inside the closed curve portion 110 to form the reinforcement protrusion 220.

5C is a view showing a state after mapping the double injection button separated from the rotating mold.

As shown in the drawing, the bridge portion 210 leaves only the two protruding portions 210b and maps the lower end portion 210a formed under the shape portion 110 of the primary resin portion 100 to be completely removed.

Compared to the conventional double injection button only the first and second resin parts of the bridge portion by the two protrusions, the present invention is a secondary formed through the coupling hole 102 in addition to the two protrusions 210b of the bridge portion 210 The primary and secondary resin parts 100 and 200 are also coupled by the reinforcement protrusion 220 of the resin part 200. Therefore, even when the secondary resin portion 200 inside and outside the shape portion 110 is separated by completely removing the lower end portion 210a of the bridge portion by mapping, the secondary resin portion 200 inside the closed curve is formed of the primary resin portion ( Less likely to fall off. In addition, since the lower end portion 210a of the bridge portion is completely removed, shading may be prevented under the shape portion 110.

In addition, when the bridge hole 101 is spaced apart from the shape part 110 by a predetermined interval, and formed inside and outside the shape part 110, the influence of the two protrusions 21b of the bridge part 210 can be eliminated, so that the shape The shape of the unit 110 can be maintained more clearly. That is, according to the present invention, not only the lower end portion 210a of the bridge portion can be removed to prevent the shading directly under the shape portion 110, and both protrusions 210b of the bridge portion are predetermined from the shape portion 110. By spaced apart, it is possible to prevent the two protruding portions 210b from indirectly affecting the shape portion 110 so that the shape of the shape portion 110 can be more clearly seen. The distance between the bridge hole 101 and the shape portion 110 may minimize the influence of the flow velocity and the moving distance of the secondary resin, and the effects of the two side protrusions 210b of the bridge portion on the shape of the shape portion 110, which are permitted by design. This can be determined by considering the optimum distance.

Then, when the diameter of the coupling hole 102 is made larger than the diameter of the bridge hole 101, and the reinforcement protrusion part 220 is formed thicker than both protrusions 210b of the bridge part, the primary resin part 100 and the secondary part are formed. The resin part 200 is more firmly coupled. The number of the coupling holes 102 and the reinforcement protrusions 220 may be more than one, considering the coupling force of the first and second resin parts 100 and 200, but in consideration of the mold design limitation, one to three may be provided. It is suitable.

On the other hand, as shown in Figure 6 the end of the reinforcement protrusion 220 is formed in the end of the reinforcement protrusion 220 so that the end of the reinforcement protrusion 220 is caught on the inner wall of the primary resin portion 100, the primary and secondary resin parts (100,200) It can also be combined more firmly.

As described above, the double injection button according to the present invention can completely remove the lower end of the bridge portion located below the shape portion of the primary resin portion to which the light of the light source is projected, so that the shape of the function display portion is not shaded. Can be easily identified, and mapping can be easily performed.

In addition, by adjusting the position of the bridge hole to exclude the influence of the protrusions on both sides of the bridge portion, there is an effect that the shape of the function display portion can be made clearer and the button having a beautiful appearance.

Claims (8)

A primary resin portion which protrudes from a surface of the shaped portion for displaying the function of the button, and bridge holes are formed in portions adjacent to the inner and outer sides of the shaped portion; In the double injection button comprising a secondary resin portion having a protrusion to be fitted to the bridge hole, covering the surface of the inner and outer portions of the shape portion to the same thickness as the height of the shape portion, and coupled to the primary resin portion, At least one coupling hole 101 is formed in the primary resin part 100 inside the shape part 110, and the secondary resin part 200 is inserted into and fixed to the coupling hole 102. Dual injection button of the car heater control unit characterized in that it comprises a 220). The method of claim 1, The diameter of the coupling hole 102 and the thickness of the reinforcement protrusion 220 fitted thereto is greater than the diameter of the bridge hole 101 and the thickness of the protrusion 210b fitted thereto, respectively. Dual injection button. The method according to claim 1 or 2, Double injection button, characterized in that the bridge hole 101 is formed in a position spaced apart from the shape portion 110 by a predetermined interval. The method of claim 1, Double injection button of the vehicle heater control unit, characterized in that the engaging jaw is formed on the inner wall of the primary resin portion 100 is formed at the end of the reinforcement protrusion 220. A shape portion 110 indicating a function of a button is formed on the surface thereof, and a portion of the shape portion 110 adjacent to the inside and outside of the shape portion 110 and the interior of the shape portion 110 and the bridge hole 101 and one or more combinations thereof. Injection molding the primary resin portion 100 so that the balls 102 are formed, respectively; The secondary resin injected onto the surface of the primary resin part 100 is introduced into the shape part 110 and the coupling hole 102 through the bridge hole 101 and is equal to the height of the shape part 110. The secondary resin introduced into the bridge hole 101 and the coupling hole 102 covers the surface of the primary resin part 100 inside and outside the shape part with a thickness, and the bridge part 210 and the reinforcement protrusion 220 are formed. Injection molding the secondary resin parts to each form; Removing the lower end portion (210b) of the bridge portion, the secondary injection button manufacturing method of the automobile heater control unit, characterized in that it comprises a finishing step for separating the secondary resin portion 200 in and out of the shape portion. The method of claim 5, Double injection button of the vehicle heater control unit, characterized in that the diameter of the coupling hole 102 is larger than the diameter of the bridge hole 101 to form the reinforcement protrusion 220 thicker than the bridge portion 210 Manufacturing method. The method of claim 5, Method for manufacturing a double injection button of the automobile heater control unit, characterized in that the injection molding the primary resin portion 100 so that the bridge hole 101 is formed in a position spaced apart from the shape portion (110). The method of claim 5, Method of manufacturing a double injection button of the automobile heater control unit, characterized in that the injection molding of the secondary resin portion so that the locking projection is formed on the inner wall of the primary resin portion 100 at the end of the reinforcement protrusion 220.