JP2002137250A - Granule supply device and electronic component molding device using this device - Google Patents

Abstract

(57) Abstract: For example, the supply amount of a granular sealing resin member supplied to a molding apparatus can be easily changed. SOLUTION: A sealing resin member (granules) 2 is supplied into a hopper 11, and the supplied granules 2 are supplied to a measuring section 12 from an outlet 11b. The weighing unit 12 includes a housing 121, a weighing box 122 having a weighing hole 122a that is slid while being supported by the housing 121, and whose bottom is openable and closable.
4 is assembled so that it can be pushed into the measuring hole 122a. Therefore, the mold pot 41 via the loader 3 of the granule 2 by the granule supply device 1
a when the adjusting member 1 is inserted into the measuring hole 122a.
By controlling the pushing amount (length L) of 24, the supply amount of the granules 2 can be adjusted easily and with high precision.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a granule supply apparatus suitable for use in a molding apparatus for transporting electronic components such as semiconductor chips.

[0002]

2. Description of the Related Art In molding electronic components such as semiconductor chips, a sealing member made of epoxy resin is often used as a sealing material supplied to a mold.

A sealing member supplied to a mold pot is melted and heated to mold an electronic component housed in a cavity of the mold. As the resin sealing member to be supplied to the mold pot, a powdery material, a columnar (lumped) so-called resin tablet, or the like is used.
When the powder is dropped into a pot, dust may be generated to adversely affect the semiconductor chip. In addition, since the unit supply amount is specified because the resin tablet is a lump, there is a problem that it is difficult to apply when the supply amount to the pot is appropriately changed depending on the product.

[0004] In this respect, since the granular sealing resin member is granular, the generation of dust at the time of being put into a pot is suppressed as compared with a powdery sealing resin member, and the granular sealing resin member has Has the advantage that it can easily cope with the adjustment of the supply amount.

In the molding of electronic parts and the like, when a product is specified, the supply amount of the sealing resin member to the mold pot is also specified automatically. The transfer of the sealing resin member to the mold pot is performed by a loader, and the amount of the sealing resin member dropped into the mold pot is supplied to a plurality of supply ports provided in the loader in accordance with the pot pitch. It is stored and transported.

FIG. 3 shows a schematic configuration of an electronic component molding apparatus employing a conventional granule supply apparatus. A granule supply apparatus 1 includes a hopper 11 for accommodating a sealing resin member 2 which is a granule. And a weighing unit 12 fixed on a base (not shown).
It is attached and fixed to the measuring section 12 by 1a.

As shown in FIG. 4, the weighing section 12 includes a housing 121 having a U-shaped cross section and a weighing box 122 which is guided by the housing 121 and is movable in the front-rear direction in the figure. Then, the amount of the sealing resin member 2 supplied from the hopper 11 is measured and supplied to the loader 3.

More specifically, the upper portion of the housing 121 having a U-shaped cross section on which the hopper 11 is placed is provided with the discharge port 11 of the hopper 11.
b is provided with a connecting port 121a, and a measuring box 122 is formed with a measuring hole 122a penetrating vertically, and a lower portion of the measuring hole 122a can be opened and closed across the measuring hole 122a. Shutter 12 so that
2b is provided.

When the shutter 122b is closed, the measuring hole 122 is closed.
When the lower part of the measuring hole 122a is shut off, the measuring hole 122a becomes a bottomed cylindrical body. In this state, the granular sealing resin member 2 is inserted into the measuring hole 122a from the discharge port 11b of the hopper 11 through the connecting port 121a. And is supplied and filled.

The granular sealing resin member 2 is inserted into the measuring hole 122a.
The weighing box 122 filled therein slides so as to be pushed out toward the front side in FIGS. 3 and 4 while being guided by the housing 121, and moves onto the loader 3 located on the front side.

The loader 3 is provided with a plurality of vertically arranged supply ports 3a corresponding to the pot pitch position of the mold 4 to which the sealing resin member 2 is supplied. Below the opening 3a, a partition plate 3b having a through hole disposed at a position corresponding to the pot pitch is slidably incorporated. Therefore, the bottom of each supply port 3a can be simultaneously cut off or simultaneously opened by sliding movement of the partition plate 3b.

On the other hand, the mold 4 has a movable lower mold 41 and a fixed upper mold 42 as shown in FIG.
The lower die 41 has a plurality of plungers 41.
1 are incorporated in each pot 41a. Accordingly, the sealing resin member 2 supplied and dropped into the pot 41a of the mold 4 is pressed against the upper mold 42 by the upward movement of the lower mold 41 in the arrow Z direction, and the plunger 411 is closed.
An electronic component (not shown) is molded by receiving press-fitting accompanying the operation.

The loader 3 reciprocates between the mold 4 and the granule supply device 1 to receive the sealing resin member 2 measured by the granule supply device 1, and receives each pot 41 of the lower mold 41.
a, and the sealing resin member 2 is received into each of the supply ports 3a while moving in a stepwise manner in the direction of arrow X while the partition plate 3b blocks below the supply ports 3a.
It is performed sequentially.

That is, the granule supply device 1 is a measuring box 1
An operation procedure for supplying the sealing resin member 2 measured at 2 into each supply port 3a of the loader 3 will be described below with reference to FIGS. 5 to 7 show enlarged cross-sectional views taken along the line AA of FIG. 3, and first, as shown in FIG.
With the lower portion of the measuring hole 122a closed by the shutter 122b, the sealing resin member 2 is moved from the hopper 11 to the connecting port 12a.
It is supplied and filled into the metering hole 122a through 1a.

The measuring box 122 of the measuring section 12 has a cylinder 1
23, the measuring box 122 is pushed out in the direction of the arrow Y while being guided by the housing 121 by the operation of the cylinder 123, and the sealing resin for the volume of the measuring hole 122a closed by the shutter 122b. The member 2 is taken out.

The measuring box 122 pushed out in the direction of the arrow Y (loader 3) by the operation of the cylinder 123 is positioned so that the measuring hole 122a coincides with the supply port 3a of the loader 3, as shown in FIG. In that state, the measuring hole 12
Shutter 122b, which previously blocked 2a at the lower part
Is moved rearward in the figure and opened, as shown in FIG. 7, the granular sealing resin member 2 housed in the measuring hole 122a is supplied to the supply port 3a partitioned by the partition plate 3b of the loader 3. It falls inside and is stored.

Thereafter, the shutter 122b moves forward in the figure to close the measuring hole 122a, and returns to the position shown in FIG.
Then, the supply and filling of the granular sealing resin member 2 are performed. In the meantime, the loader 3 is driven by a driving mechanism (not shown) for one step (that is, for one pot pitch), X
By the movement in the direction, the next supply port 3a is positioned.

Thus, the reciprocating movement of the measuring box 122 by the cylinder 123, the step-like movement of the loader 3 synchronized with the reciprocating movement, and the shutter 12
By the opening and closing operation of 2b, each supply port 3a of the loader 3 is
The amount of the sealing resin member 2 measured in the measuring box 12 is sequentially supplied.

3 to 7, the shutter 122
Although a drive mechanism for b and the partition plate 3b is not shown, it is configured to perform a reciprocating operation by using a ball screw rotation mechanism driven by a motor or a cylinder.

Since the conventional granule supply device 1 is configured as described above, if the amount of the sealing resin member 2 dropped into the pot 41a needs to be changed according to the type of the molded product, etc. Is the volume (size) corresponding to it
Has been replaced with the granule supply device 1 having the measuring hole 122a.

[0021]

As described above, the amount of the granular sealing resin member 2 supplied to the pot 41a often needs to be changed depending on the type of the molded product. The operation of replacing the granule supply device 1 with a different volume in the measuring hole 122a was performed.

However, in recent years, the diversification of mold products has been progressing, and the shape and size of the pot 41a of the mold 4 and the like have been showing a diversification tendency in accordance with the type of the product. According to the type of the mold 4, the measuring holes 12
It was not easy to prepare the granule supply devices 1 having different capacities 2 and the replacement operation itself became a heavy burden on the operator.

In addition, as electronic components and the like are further miniaturized, it is required to more strictly adjust the amount of the sealing resin member 2 to be molded. It is inevitable that fine variations occur in the size of the granules, and there has been a demand for a granule supply device capable of finely adjusting the amount of the granules to be supplied in accordance with the fluctuation of the granules of the granular resin.

Accordingly, the present invention provides a granule supply apparatus capable of changing the supply amount of granules with a simple structure, adjusting the supply amount with high precision, and supplying the granules to a loader, and an electronic component molding apparatus using the apparatus. The purpose is to provide.

[0025]

According to a first aspect of the present invention, there is provided a granule supply device, wherein a granule is supplied, and a hopper having a discharge port for discharging the supplied granule, and a hopper penetrating the discharge port of the hopper. A housing having a connection port,
A weighing box which is slid while being supported by the housing and whose opening is formed to be able to communicate with the connection port and whose bottom is openable and closable, and an adjustment formed so as to be freely inserted into the weighing box. And a member.

As described above, since the adjusting member is provided so as to be freely inserted into the measuring box, the substantial volume in the measuring box can be easily and accurately adjusted only by adjusting the insertion amount of the adjusting member. Can be changed.

According to a second aspect of the present invention, there is provided an electronic component molding apparatus using the granule supply device according to the first aspect, wherein the granules are made of synthetic resin, and the measuring box is provided with the granules to the loader by opening the bottom. The supply and loader is configured to convey the supplied granules and drop them into a mold pot.

As described above, according to the second aspect of the present invention, by adjusting the length of insertion of the adjusting member into the measuring box, the supply amount of the synthetic resin member for molding dropped into the pot can be set with high accuracy. In addition, it is possible to easily cope with a variety of electronic component molds.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a granule supply apparatus according to the present invention and an electronic component molding apparatus using the apparatus will be described below in detail with reference to FIGS. The same components as those of the conventional configuration shown in FIGS. 3 to 7 are denoted by the same reference numerals, and detailed description is omitted. In addition, the present invention is particularly characterized in the granule supply device, and since the configuration of the mold and the like is the same as the conventional configuration shown in FIG. 3, the granule supply device and the loader portion connected thereto are shown in FIGS. 2 will be described.

FIG. 1 is a cross-sectional view of a main part showing a state in which an embodiment of a granule supply apparatus according to the present invention is applied to an electronic component molding apparatus. FIG. 2 is a sectional view taken along line BB in FIG. It is sectional drawing seen.

As shown in FIG. 1, the granule supply device 1
The hopper 11 is fixed to the measuring section 12 with a screw 11a, and the hopper 11 is supplied with and accommodates the granular sealing resin member 2 which is a granule.

The measuring section 12 is composed of a casing 121 having a U-shaped cross section and a measuring section 122 which is guided by the casing 121 and is movable in the front-rear direction in the figure, and a sealing resin member supplied from the hopper 11. 2 is supplied to the loader 3 while being weighed. A connection port 121 connected to the discharge port 11a of the hopper 11 is provided in an upper piece 121a of the housing 121.
a is provided, and the measuring box 122 is formed with a measuring hole 122a penetrating vertically. A shutter 122b is provided below the measuring hole 122a so that the measuring hole 122a can be opened and closed freely.

When the shutter 122b shuts off the measuring hole 122a, the measuring hole 122a becomes a bottomed cylindrical body. In this state, the sealing resin member 2 is supplied and filled from the hopper 11 to the measuring box 122.

As shown in FIGS. 1 and 2, the weighing box 122 has an adjusting member 1 formed of a rod having a square cross section.
24 is provided so as to penetrate the box wall and into the weighing box 122 so as to be insertable in the direction of arrow C in FIG. 2, and the length L protruding into the weighing box 122 is adjustable.

A bolt 125 is screwed into the box wall of the measuring box 122 in a direction intersecting the longitudinal direction of the adjusting member 124, and a tip end of the bolt 125 is attached to the adjusting member 12.
4, the adjustment member 124 whose length L is adjusted and set.
Is configured to be fixable. Therefore, the volume in the measuring hole 122a to which the granular sealing resin member 2 is supplied changes depending on the length of the inserted adjusting member 124 in the measuring hole 122a.

That is, the measuring hole 122 of the adjusting member 124
By adjusting the protruding length L into a, the amount of the sealing resin member 2 housed in the measuring hole 122a can be arbitrarily adjusted with the shutter 122b closed.

In this manner, by adjusting the insertion length L of the adjusting member 124 into the measuring hole 124, the measuring box 1 is adjusted.
The granular synthetic resin member 2 arbitrarily weighed and stored in the container 2 is weighed by the cylinder 123 in the same manner as in the prior art.
Due to the reciprocation of the load 22, the step movement of the loader 3 synchronized with the reciprocation, and the opening and closing operation of the shutter 122b, the amount of the sealing resin member measured by the measuring box 12 is supplied to each supply port 3a of the loader 3. 2 are sequentially supplied.

In this embodiment, the adjusting member 12
4 has a quadrangular cross section, and its top is assembled in the up, down, left, and right directions, that is, in the direction of the triangle, so that the granular sealing resin member 2 supplied from above is provided with a gap (space) in the measuring hole 122a. Is filled smoothly without forming and accurate weighing is performed.

In this embodiment, the measuring hole 1
Although the cross section of the supply port 22a, the supply port 3a, and the like is illustrated and described as being square, the cross section is generally circular, that is, cylindrical, in accordance with the mold pot 41a having a generally circular cross section. Needless to say, such a configuration may be adopted.

Further, if the adjusting member 124 can be finely moved by the motor driving mechanism, more accurate weighing adjustment can be performed. Further, by allowing the adjusting member 124 to be finely moved by the motor drive, after the metering and before the shutter 122b is opened, the adjusting member 124 is retracted from the measuring hole 122a to adjust the granular resin supplied from above. Member 1
It fills smoothly without remaining on 24.

As described above, in the granule supply device of the present invention, as described above, the rod-shaped adjustment member 124 is connected to the measuring box 1.
22 so that the amount of the granular sealing resin member 2 dropped into the pot 41a can be easily changed in accordance with the type of the molded product and the like. Since the sealing resin member 2 can be measured and set with high accuracy, it is possible to easily cope with the molding of electronic components of various sizes.

[0042]

The granule supply apparatus of the present invention can change and adjust the measured value of granules with high accuracy with a simple structure, and is therefore remarkably employed for, for example, measuring and supplying a sealing resin member in an electronic component molding apparatus. The effect can be exhibited.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of a granule supply device according to the present invention.

FIG. 2 is a sectional view of the device shown in FIG.

FIG. 3 is a schematic configuration diagram of an electronic component molding device employing a conventional granule supply device.

FIG. 4 is an enlarged front view of the granule supply device shown in FIG.

FIG. 5 is an enlarged cross-sectional view of the granule supply device shown in FIG.

FIG. 6 is a sectional view showing an operation state of the granule supply device shown in FIG.

FIG. 7 is a cross-sectional view showing an operation state of the granule supply device shown in FIG. 5 following FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Granule supply apparatus 11 Popper 11b Discharge port 12 Measuring part 121 Housing 121a Connecting port 122 Measuring box 122a Measuring hole 122b Shutter 123 Cylinder 124 Adjusting member 125 Bolt 2 Sealing resin member (granule) 3 Loader 3a Supply port 3b Partition plate 4 Mold 41 Lower mold 41a Pot 42 Upper mold

Claims (3)

[Claims] 1. A hopper having a discharge port to which granules are supplied and discharging the supplied granules, a housing having a connecting port extending from the discharge port of the hopper, and moving while being supported by the housing. A weighing box having an opening formed so as to be connected to the connection port and a bottom part configured to be openable and closable, and an adjusting member formed so as to be insertable into the weighing box. Granule supply device. 2. The granule is made of synthetic resin, the measuring box supplies the granule to a loader by opening the bottom, and the loader conveys the supplied granule to a mold pot. An electronic component molding apparatus using the granule supply device according to claim 1, wherein the electronic component molding device is configured to be dropped. 3. The granule supply device according to claim 1, wherein the adjustment member is configured to be fixed by a bolt inserted from a direction intersecting with the longitudinal direction. Electronic parts molding equipment.