JP3293208B2 - Exterior resin film forming equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exterior resin film forming apparatus used for manufacturing electronic parts.

[0002]

2. Description of the Related Art Hitherto, in electronic parts and the like, it has been practiced to improve the moisture resistance and aesthetic appearance by covering the entire periphery of the part body with a protective exterior resin film. Such an exterior resin film is generally formed by employing a so-called dipping (immersion) method, and is not shown in an exterior resin film forming apparatus that executes this method, The component main body is suspended and held by a component holder that moves up and down, and then the component main body is immersed in an exterior resin liquid such as an epoxy resin stored in a liquid tank, and is pulled up after a predetermined time has elapsed. ing.

[0003] By the way, technical standard values are defined for the formation range of the exterior resin film formed according to such a procedure, and it is necessary to adhere to these standard values. If the level of the exterior resin liquid in which the component body is immersed is reduced due to evaporation or repeated immersion operations, it becomes impossible to form an exterior resin film covering a range in accordance with the standard value. Therefore, in this type of exterior resin film forming apparatus, the liquid level of the exterior resin liquid is always detected by a sensor, and the lowermost end position of the component holder corresponds to the liquid level as the liquid level decreases. Control has been performed to lower it to the position where it was set.

[0004]

However, in the above-mentioned conventional packaging resin film forming apparatus, the liquid level of the packaging resin liquid is detected, and the lowering operation of the component holder is controlled in response to the detection. Therefore, these control mechanisms become complicated and the overall configuration becomes large, and the manufacturing cost becomes high.
Further, depending on the exterior resin liquid, it may be difficult to detect the liquid level with a sensor, and there has been a problem that the liquid level cannot always be accurately detected.

SUMMARY OF THE INVENTION The present invention has been made in view of these inconveniences, and provides an exterior resin film forming apparatus capable of easily forming an exterior resin film as specified without having to use a complicated control mechanism. The purpose is to provide.

[0006]

In order to achieve the above object, an apparatus for forming an exterior resin film according to the present invention comprises an outer tank into which an exterior resin solution is injected and an outer tank which is stored in the outer tank. after being immersed in the resin solution, and the inner tub to pump a portion of the outer instrumentation resin liquid by being lifted, lowered and held hanging component body to form the armor resin film, and the inner tank and the part body It is equipped with a component holder that is immersed in the exterior resin liquid accumulated inside and lifted up, and the inner tank overflows the excess exterior resin liquid pumped from the outer tank to a predetermined liquid level. It is characterized by forming an overflow part to maintain.

[0007]

According to the above construction, since the overflow portion is formed in the inner tank, the amount of the exterior resin liquid that is pumped up from the outer tank by the inner tank and then accumulated in the inner tank becomes constant. The surface level is always constant. That is, each time the immersion work of the component body is repeatedly performed, the inner tank is lowered in advance and immersed in the exterior resin liquid in the outer tank, and
If the inner tank is raised and raised to a predetermined height position, the liquid level of the exterior resin liquid accumulated in the inner tank is always kept constant. Therefore, the component body is immersed in the exterior resin liquid whose liquid level is maintained by the lowering operation of the component holder, and after a predetermined time has elapsed,
When the component holder is lifted to the outside of the exterior resin liquid by the ascending operation, the formation range of the exterior resin film formed by the exterior resin liquid adhering to the periphery of the component body is always constant. Cannot deviate from the standard value.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view schematically showing an exterior resin film forming apparatus according to the present embodiment, and FIG. 2 is an explanatory view showing a main part of the apparatus during operation. It is a film forming apparatus.

The exterior resin film forming apparatus 1 includes an outer tank 2 in which an exterior resin liquid L such as an epoxy resin is injected and stored.
And an inner tank 3 for pumping a part of the outer resin liquid L collected in the outer tank 2 and a component holding for suspending and holding each of a plurality of component bodies 4 on which an outer resin film is to be formed via lead terminals or the like. The inner tank 3 and the component holder 5 are each raised and lowered by a drive operation mechanism (not shown) configured using a hydraulic cylinder, a pneumatic cylinder, or the like. ing. That is, the inner tank 3 is configured to be immersed in the exterior resin liquid L in the outer tank 2 by the lowering operation, and to be pulled up to a predetermined height position outside the outer tank 2 by the ascending operation. Reference numeral 5 denotes a configuration in which the component main body 4 is immersed in the exterior resin liquid L accumulated in the inner tank 3 by the lowering operation, and is then lifted by the raising operation.

The outer tub 2 is provided on one side edge of the inner tub 3.
The excess resin liquid L collected in the inner tank 3 is caused to overflow by surplus of the outer resin liquid L pumped from the inside.
An overflow portion 6 for maintaining the liquid level is formed. Therefore, only a fixed amount of the exterior resin liquid L is accumulated in the inner tank 3, and the liquid level thereof is always defined as a result of being defined by the overflow section 6. Although the overflow portion 6 has a shape in which one side edge of the inner tank 3 is entirely removed over a predetermined width in the drawing, the shape is not limited to this, and only a part thereof is partially removed. Needless to say, the shape may be notched. Reference numeral 7 in FIG. 1 denotes a stirring blade provided for stirring the exterior resin liquid L accumulated in the outer tank 2, and the stirring blade 7 includes a motor provided outside the outer tank 2. (Not shown).

Next, the operation of forming an exterior resin film, which is repeatedly performed by the exterior resin film forming apparatus 1 having the above configuration, will be described.

In forming the exterior resin film, prior to immersing these component bodies 4 in the exterior resin liquid L,
First, after lowering the inner tank 3 and immersing it in the exterior resin liquid L stored in the outer tank 2, as shown in FIG. It is pulled up to a predetermined height position above the liquid level of the accumulated exterior resin liquid L. Then, a surplus of the exterior resin liquid L overflows from the overflow portion 6 of the inner tank 3 during the lifting, and a fixed amount of the exterior resin liquid L is accumulated in the raised inner tank 3. Then, the liquid level of the exterior resin liquid L accumulated in the inner tank 3 is constant without changing from the liquid level at the time of the immersion work previously performed.

Then, by lowering the component holder 5, the component main body 4 is immersed to a predetermined depth position in the exterior resin liquid which is collected in the inner tank 3 and the liquid level is maintained,
If the component body 4 is pulled up to the outside of the exterior resin liquid L by elevating the component holder 5 after a predetermined time has elapsed, the exterior resin liquid having a predetermined thickness to become an exterior resin film around the component body 4. L is attached, and the formation range of the exterior resin film is within the range of the standard value. In addition, when the component body 4 is immersed, as shown in FIG. 2, the exterior resin liquid L accumulated in the inner tank 3 overflows, and the exterior resin liquid L
Will drop. However, following this state, the inner tank 3 is immersed again in the exterior resin liquid L stored in the outer tank 2, so that no inconvenience occurs.

By the way, a thin film-like lump is generated on the liquid surface of the exterior resin liquid stored in the liquid tank in the conventional example. In the resin film forming apparatus 1, as a result of frequent stirring of the exterior resin liquid L by immersion and lifting of the inner tank 3, it is unlikely that a lump as in the conventional case occurs.

[0016]

As described above, according to the packaging resin film forming apparatus according to the present invention, the packaging resin film in a state where the specified standard value is respected can be easily and easily used without using a complicated control mechanism. The effect that it can be formed at low cost is obtained.

[Brief description of the drawings]

FIG. 1 is an external perspective view schematically showing an exterior resin film forming apparatus according to the present embodiment.

FIG. 2 is an explanatory diagram showing a main part configuration during the operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exterior resin film forming apparatus 2 Outer tank 3 Inner tank 4 Component body 5 Component holder 6 Overflow part L Exterior resin liquid

Claims (1)

(57) [Claims] 1. An outer tank (2) into which an exterior resin liquid (L) is injected and stored; and an outer tank (2) immersed in an exterior resin liquid (L) accumulated in the outer tank (2), and then pulled up. inner tank for pumping a portion of the outer instrumentation resin solution (L) and (3), hanging component body to form the armor resin film (4) holds, and the inner tank the component body (4) ( 3) a component holder (5) that is immersed in the exterior resin liquid (L) collected in the interior and lifted up, and the inner tank (3) has an exterior resin pumped from the outer tank (2). An exterior resin film forming apparatus, wherein an overflow section (6) for maintaining a predetermined liquid level by overflowing a surplus of the liquid (L) is formed.