JP2714157B2 - Automatic molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to an automatic molding apparatus that automatically seals a semiconductor device after completion of wire bonding with a resin.

(Prior Art) In a general resin molding process of the above-described conventional semiconductor device, a molding operation has been performed manually using a transfer molding apparatus.

 This will be described with reference to FIGS. 27 to 29.

First, as shown in FIG. 27, a predetermined number of wire-bonded lead frames 2 of a predetermined length are arranged on the upper surface of the loading jig 1 manually or by an automatic arrangement machine. The loading jig 1 holding the lead frame 2 is carried to above the lower mold 4 of the transfer mold apparatus 3 shown in FIG.
The lead frame 2 is placed on the upper surface of the device.

Then, after the mold is clamped by the lower mold 4 and the upper mold 5, the resin tablet heated by the preliminary heating device is put into the input pot 6 of the upper mold 5, and the plunger is set. 7 is operated to perform injection molding of this resin.

After the curing is completed, the molds 4 and 5 are opened, and the molded product 8 with the cull 9 and the runner 10 shown in FIG. 29 is taken out. Then, the resin residue remaining on the mold dies 4 and 5 is removed by air blow or the like, and the mold dies are removed.
Brush the dirt on the surface of 4,5 with a brush.

Since the molded product 8 is provided with a cull 9 and a runner 10 which are unnecessary resins, these are separated from the lead frame 11 sealed with resin, and the separated lead frame 11 is stored in a storage container. Dispose of the resin in unnecessary resin containers.

The above operation is regarded as one cycle, and the molding operation of the semiconductor device is repeatedly performed manually.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional example, supply of the lead frame and the resin tablet to the molding die, removal of the molding from the molding die, and separation of the molded product after the cull / runner separation. Since the work such as storage was mainly performed manually, the workability was remarkably poor, and not only the productivity could not be improved, but also the bonding wire was deformed and the quality was sometimes deteriorated. .

In particular, the pre-process from the mounting process to the wire bonding process is generally performed on a continuous line in a clean room or the like. However, since the molding process is outside the clean room, it does not ride on this line, so it is necessary to stock once here. At present, it has become a major bottleneck in achieving production lines.

In addition, since a large mold press of 80 to 250 tons and a large mold of 500 kg to 1 ton were used in general, not only the space efficiency in replacing the molds is poor, but also the layout can be easily changed. For example, there is a problem in that it takes a lot of time to set up the type change, and it is not possible to expect a reduction in the construction period, and the mold is generally considerably expensive.

In view of the above, the present invention automatically supplies a lead frame and a resin tablet to a mold, from molding, taking out a molded product and removing a cull runner to storing the molded product after the cull runner is removed. By doing so, it is an object to provide a product capable of improving productivity and quality, shortening the type switching time and reducing the size of the molding device itself.

[Configuration of the invention]

(Means for Solving the Problems) In order to achieve the above object, an automatic molding apparatus according to the present invention is an automatic molding apparatus for sealing a semiconductor device after completion of wire bonding in a lead frame magazine of a frame loader section. An inloader section for directly taking out the wire bonded lead frames housed one by one from the lead frame magazine and directly supplying the lead frames to a predetermined position on a lower mold of a mold attached to a mold press; and A resin tablet input pot for holding the molded product after the completion of the molding by the mold press, transporting the molded product to the following cull / runner separating unit and storing the molded product after the cull / runner removal in the storage stocker unit. Eliminates need for molded parts The runner / gate is separated from the molded product, and the runner gate is separated from the molded product. The resin tablets are taken out one by one from the tablet stocker section where resin tablets are stacked and stored and put into the resin tablet input pot of the above-mentioned outloader section. A resin tablet supply unit that guides the inloader unit when the inloader unit moves between the frame loader unit and the mold die, and the outloader unit includes the mold die and the cal runner. A single guide rail that guides the outloader section when moving between the separation section and a lead frame from a lead frame magazine containing a lead frame of a predetermined length. One frame from molding to storage of molded products in the stocker In unitless, characterized in that to perform one by one.

Further, the frame loader unit and the inloader unit may include:
An opening / closing adjustment mechanism for adjusting a holding opening / closing amount required for holding the lead frame in response to storage information regarding dimensions such as a width of the lead frame is provided.

(Operation) According to the present invention configured as described above, supply of the lead frame and the resin tablet after wire bonding to the molding die, molding by the molding die, removal of the molded product, and culling of the molded product・ All processes from removal of the runner to storage of the molded product after removal of the runner can be performed automatically, thereby improving the productivity and quality, and at the same time, removing the lead frame, molding and storing. By performing the storage of the molded product in the stocker unit in units of one frame, it is possible to reduce the size of the mold, the type switching time, and the overall size of the molding apparatus.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 26.

As shown in FIGS. 1 and 2, the molding apparatus in the present embodiment includes a frame loader section 12, an inloader section 13,
Mold mold 14, Mold press 15, Outloader 1
6, Cal runner separation unit 17, storage stocker unit 18, tablet stocker unit 19, tablet supply unit 20, preheater unit
21, die cleaner unit 22, transfer unit 23 and control unit 24
It is mainly composed of

The frame loader unit 12 is provided with a lead frame magazine 26, and the lead frames 25 taken out one by one from the magazine 26 by the inloader unit 13 are supplied to the mold 14. On the other hand, the resin tablet 29 stocked in the tablet stocker section 19 is
After being taken out one by one and preheated by the pre-heater section 21, they are thrown into the tablet throw-in pot 60 of the outloader section 16. Then, the outloader section 16 is
Then, the preheated resin tablet 29 is charged into the charging pot 30 of the lower mold 14a to perform molding. After the completion of this molding, the molded product is taken out by the outloader section 16, and after the cull / runner separation section 17 separates the cull / runner, only the molded article 28 after the cull / runner separation is removed by the outloader section 16. It is carried to the storage stocker unit 18 and stored inside the storage stocker 27.

Thereafter, the parting surface of the mold 14 is cleaned by the die cleaner unit 22 to complete one cycle of the resin molding of the semiconductor device. In the present embodiment, the above operation is performed fully automatically. It has been done.

 Hereinafter, the details of each unit will be described.

First, details of the frame loader section 12 are shown in FIG.

The frame loader unit 12 includes a magazine 26 for arranging and storing lead frames 25 of a predetermined length one by one in multiple stages,
The elevator 73 is mainly constituted by an elevator 73 for moving the magazine 26 up and down, and the elevator 73 is provided with a stopper 73a for abutting against the front end face of the lead frame 25 housed in the magazine 26 to perform this positioning. The magazine 26 is lowered by the operation of the elevator 73, and is positioned below the stopper 73a, and the lead frames 25 in which the contact is released are sequentially taken out one by one from the in-loader unit 13 described below. I have.

Further, the magazine 26 is placed and held with a pair of side plates 74 sandwiching the side surfaces thereof.
The rotation of the rotary actuator 76, which can be rotated forward and backward by the air changeover switch 75, is fixed to the support plate 77 which moves in the direction away from each other via the gear 76a and the rack 77a.

Accordingly, it is possible to cope with a change in the width of the lead frame 25 and, consequently, the magazine 26 in which the lead frame 25 is stored, while keeping the center in the width direction constant.

Next, FIGS. 4 to 6 show details of the inloader section 13. FIG.

The transfer section 23 extending from the frame loader section 12 toward the storage stocker section 18 is provided in the inloader section 13.
Slide block that runs on the main guide rail 31
A sub-table 34 is fixed to the slide block 32 via an in-loader table 33.

A pair of sub guide rails extending in a direction orthogonal to the main guide rail 31 are provided on the upper surface of the sub table 34.
Two sliders 37a, 37b, 38a, 38b are respectively fitted on the sub guide rails 35, 36 so as to run freely, and the sliders 37a, 37b, 38a, 38
A pair of moving bars 39, 40 that move in parallel in the length direction of the sub guide rails 35, 36 are fixed on b.

Further, support members 39a, 40a having internally threaded opposite threads are fixed to the moving bars 39, 40, and each of the internally threaded threads is rotated by the pulse motor 58 and is oppositely threaded left and right. Male screw portions are screwed into the left and right male screw portions of the engraved screw screw 57, respectively, whereby the rotation of the screw screw 57 accompanying the rotation of the pulse motor 58 causes the moving bars 39, 40 to move in parallel in opposite directions. It is configured to open and close.

Each of the moving bars 39 and 40 has two ball bushes 4
1a, 41b, 42a, 42b are inserted respectively, and this ball bush 41
The shafts 43a, 43b, 44a, and 44b are slidably inserted into a, 41b, 42a, and 42b, respectively.
At a lower end of 43b, 44a, 44b, a pair of holding bars 45, 46 extending parallel to the direction of the main guide rail 31 is fixed. Thus, the holding bars 45, 46 are also integrally opened and closed simultaneously in synchronization with the opening and closing of the moving bars 39, 40.

Further, the holding bar is provided on the upper surface of the sub-table 34.
A cylinder 47 is provided for vertically moving 45 and 46. As shown in FIG. 5, the swing lever 48 swings around a pivot 48a by the forward and backward movement of the cylinder 47, and with this swing, The holding bars 45, 46 are configured to move up and down via rollers 45a, 46a fixed to the holding bars 45, 46.

A plurality of drive V-groove rollers 50 that are rotated by the rotation of a motor 49 are arranged on the one holding bar 45 along the length direction of the holding bar 45. And the other holding bar
The 46 is provided with a plurality of pieces 52 independently held in a suspended state on a shaft 51. Each piece 52 is further provided with a driven V-groove roller 53, and each piece 52 is provided with a spring. Each spring is biased inward by 54
It is made to press inward by the elastic force of 54.

 Next, details of the transfer section 23 are shown in FIG.

That is, the transfer unit 23 is
Between the side of the frame loader section 12 and the mold 14, and the following outloader section 16 to the mold 14 and the
The frame loader section 17 is for individually traveling between the runner separating section 17 and the storage stocker section 18.
A main guide rail 31 extending from the side of the storage stocker section 18 to the rear, a pulse motor 59a, 59b attached to both ends of the main guide rail 31, and a travel running by rotation of the pulse motors 59a, 59b. Belt 59c, 59d, and the one running belt 59c is provided with the stride block 32 of the in-loader section 13 and the other running belt 59d is provided with the slide block 32a of the out-loader section 16.
Are fixed respectively.

Accordingly, the inloader section 13 travels along the main guide rail 31 with the rotation of the one pulse motor 59a, and the outloader section 16 moves along the main guide rail 31 with the rotation of the other pulse motor 59b. It is configured to run individually.

Next, a case where the lead frame 25 stored in the frame loader unit 12 is transported to the mold 14 will be described with reference to FIGS.

When pulling out the lead frame 25 from the magazine 26 of the frame loader section 12, the holding bars 45 and 46 of the inloader section 13 are opened in advance via the screw screws 57, and a predetermined position where the lead frame 25 can be taken out in this state. The in-loader unit 12 is moved along the main guide rail 31 until (FIG. 9). Then, at this position, as shown in FIG.
The lower lead frame 25 located below the stopper 73
The holding bars 45, 46 are closed until the V-groove rollers 50, 53 abut against the end surfaces in the width direction of the lead frame 25, whereby the lead frame 25 is securely held via the elastic force of the spring 54.

Next, the motor 49 located on this one holding bar 45
, The drive V-groove roller 50 is rotated, thereby pulling out one lead frame 25 from the magazine 26 and moving it until the moving end thereof comes into contact with the stopper 55 provided on the holding bar 45, and the proximity switch 56 This feed is stopped when the lead frame 25 is detected. Thereafter, the pulse motor 59 on the inloader side of the transfer section 23
By driving a, the in-loader unit 13 travels along the main guide rail 31 to a predetermined position of the mold 14 and stops (FIG. 10).

Then, by driving the cylinder 47, the holding bars 45 and 46 are moved to the pilot pin holes 25p of the lead frame 25.
(Fig. 8) shows the pilot pin 14p of the lower mold 14a.
(Fig. 9) is lowered to a slightly peeping position.

Thereafter, the pulse motor 58 is driven to hold the holding bars 45, 46.
The lead frame 25 is placed on the upper surface of the lower mold 14a. Thereafter, the holding bars 45, 46 of the in-loader section 12 are raised in an open state, and returned to the original position shown in FIG.

When the width direction of the lead frame 25 changes, the holding bars 45 and 46 are opened and closed by rotating the screw screw 57 by the pulse motor 58. This greatly facilitates the type switching operation.

In addition, as for the change in the length direction of the lead frame 25, since a plurality of V-groove rollers 50, 53 are installed along the length direction of the holding bars 45, 46, it is possible to respond to all types without switching. Therefore, the work of changing the type becomes unnecessary.

FIG. 11 shows details of the mold 14 and FIG. 12 shows details of the mold press 15, respectively.

The mold 14 comprises a lower mold 14a and an upper mold 14b.
By performing the molding of 5, it is configured such that the miniaturization and the line from the wire bonding step of the molding can be achieved.

That is, the lower mold part 14a is formed with a storage part 14c for storing one sheet of the lead frame 25, and a pot 30 for receiving one resin tablet 29. Further, a plurality of pilot pins 14p for performing this positioning are protruded by being inserted into the pilot pin holes 25p of the lead frame 25.

This makes it possible to reduce the weight to about 120 kg, compared to the conventional mold that was considerably heavy, 500 kg to 1 ton, and to reduce the weight of the entire molding apparatus with the reduction in the weight of the mold 14. be able to.

The mold press 15 is used to hold the mold 14 and perform mold clamping, transfer molding, and extrusion of the molded product. The mold press 15 is driven not by a hydraulic system but by an electric system so that it can be used in a clean room or the like. It is configured as follows.

That is, the mold press 15 is rotated to move the upper mold 14b up and down to rotate the lower mold 1b.
Motor 78a for clamping with 4a (Fig. 12 (a))
By rotating the plunger 15a up and down, the motor 78b (see FIG. 2B) for performing transfer molding of the resin tablet 29 put into the pot 30 of the mold 14 and the mold by rotating. Push rod 15
A motor 78c ((c) in the figure) is provided for moving b up and down to push the molded product out of the storage portion 14c of the lower mold 14a.

Details of the outloader section 16 are shown in FIG. 13 and FIG.

The outloader section 16 has a tablet charging pot 60 for charging a resin tablet 29 and a molded product.
A vacuum pad 62 for adsorbing 61 is provided, and along the same main guide rail 31 as the inloader section 13 via the outloader section side pulse motor 59b (FIG. 7) of the transfer section 23 as described above. It is configured to reciprocate between the mold 14 and the cull / runner separating section 17 and further to the storage stocker section 18.

The positions of the vacuum pads 62 for sucking the molded product 61 are two places in the cavity part and one place in the cull part, for a total of three places. In order to replace the varieties, the vacuum pad that loosens the two thumb screws 63 and sucks the cavity
It can be easily adjusted by manually adjusting the position of 62.

Further, as shown in FIG. 14, a shutter located below the tablet input pot 60 is
64 are provided, and the input pot 60 of the outloader section 16 is provided.
When the resin tablet 29 put into the container is transported to a position just above the pot 30 of the lower mold 14a, the shutter 64 is opened through the air cylinder 65, so that the resin tablet 29 is put into the pot 30. Have been like that.

 FIG. 15 shows the details of the cull / runner separating section 17.

The cull / runner separating portion 17 is swingable in a vertical direction via a cylinder, and is provided with a substantially center in the width direction of a molded article 61 after molding placed on the upper surface of the cull / runner separating portion 17. A central presser 17a that presses from above, a side presser 17b that also oscillates via a cylinder 79, and the cal runner 61a side of the placed molded product 61 presses a side edge from above, and is placed. The cylinder 8 is located below the cull runner 61a attached to the molded product 61.
There is provided a push plate 17c that can move up and down through 0.

The molded product 61 conveyed by the outloader unit 16 is placed on the upper surface of the cull / runner separating unit 17, and is fixed from above by the center press 17a and the side press 17b swinging. You. Then the cylinder
When the push plate 17c rises via 80, the cull runner 25a attached to the molded product 61 swings upward and is separated from the base end.

Next, the operation state of the outloader section 16 will be described with reference to FIGS. 14 and 15, and FIGS. 16 and 17.

First, after one resin tablet 29 is charged into the tablet loading pot 60 of the outloader section 16 as described below, the outloader section 16 moves to the mold 14 as shown in FIG. And stop. Then, as shown in FIG. 14, by opening the shutter 64 via the air cylinder 65, the resin tablet 29 is removed from the lower mold 14a.
Into the input pot 30.

After being molded by the mold press 15, the molded product 61 is held by the vacuum pad 62 of the
It is transported to 17 where the unnecessary cull runner 61a is separated as described above. The molded product 28 from which the cal runner 61a is separated is held again by the vacuum pad 62 of the outloader unit 16, and as shown in FIG.
It is carried to the storage stocker section 18 and is loaded into the storage stocker 27 of the storage stocker section 18.

An elevator (not shown) that can move up and down is provided inside the storage stocker 27, and a sensor is provided on the side, and an upper surface of a molded product 28 stored in the storage stocker 27 is provided. Then, the distance between the lower surface of the completed mold product 28 to be stored next is always constant.

Here, the tablet input pot 60 is the resin tablet 29
When changing the product type, keep the
Since only the height direction is changed, there is no need to replace parts or the like, and it is not necessary to switch the type.

 FIG. 18 shows details of the tablet stocker unit 19.

That is, the tablet stocker unit 19 is capable of running left and right via the belt 82 and the holding body 83 by driving the motor 81, and a plurality of stockers 19a that store the resin tablets 29 in a line in the vertical direction in a horizontal state, and It is mainly composed of a tablet receiver 19b disposed below the stocker 19a that can move up and down via a cylinder 84. At the lower end of each stocker 19a, a stopper 19c that projects between the tablet receiver 19b and holds the lower part of the resin tablet 29 located at the lowermost end is swingably supported. A cylinder 85 for driving this is connected.

The tablet presence / absence detection in the tablet receiver 19b is composed of a swing arm 87 and a tablet presence / absence detection sensor 86. The swing arm 87 is pivoted on the support shaft 87a, the tablet receiving side is lifted, and the opposite side (the tablet presence / absence detection sensor 86 Side) is attached to the support shaft 87a with its center of gravity shifted so as to be in a lowered state, and is in a state of being separated from the tablet presence / absence detection sensor 86. Then, when the resin tablet 29 is placed on the tablet receiver 19b, the swing arm 87 is lowered, and the opposite side enters the tablet presence / absence detection sensor 86 to detect the resin tablet 29, and the tablet is present.

Take out the resin tablet 29 first.
After the tablet detection sensor 86 confirms that the resin tablet 29 is not on the upper surface of the tablet receiver 19b at the position where the 29 is supplied, the tablet receiver 19b is driven to the position below the stocker 19a with the rotation of the motor 81. Thereafter, the tablet receiver 19b is raised via the cylinder 84 to hold the lower portion of the resin tablet 29 located at the lowermost end of the stocker 19a with the tablet receiver 19b. To release the holding, and the upper all resin tablets 29 are placed on the tablet receiver 19b. When the tablet receiver 19b is lowered to a predetermined position, the stopper 19c is swung in the opposite direction to hold the second and subsequent resin tablets 29. Then, the tablet receiver 19b is further lowered to take out the resin tablets 29 one by one from the tablet stocker unit 19.

 19 to 23 show details of the tablet supply 20.

That is, the tablet supply unit 20 is provided with a guide rail disposed between the tablet stocker unit 19 and the mold 14.
A movable body 66 reciprocated by a cylinder (not shown) along 66a, and a pair of movable bodies 66 which are held by the movable body 66 so as to be pivotable on a plane orthogonal to the guide rail 66a, and which can open and close the resin tablet 29 at the tip. It mainly comprises a rotary arm 67 provided with a chuck portion 68 gripped by the claw 72, a pulse motor 70 for rotating the rotary arm 67, and a cam plate 69 fixed to a moving body 66.

The rotary arm 67 is integrally connected to a support shaft 67a that rotates with the rotation of the pulse motor 70, and is configured to rotate in synchronization with the rotation of the pulse motor 70.

Further, the rotating arm 67 is provided with a support shaft 91, the chuck portion 68 is connected to one end, and a driven bevel gear 92 is provided at the other end. A roller 88 running in contact with the peripheral edge of the cam plate 69 is provided in a state where it is urged by a spring 89 in the direction of the base circle center 0 of the cam plate 69. The roller 88 is attached to a lever 88a, is connected to a drive bevel gear 90 via a support shaft 88b of the lever 88, and is provided in mesh with the driven bevel gear 90.

Further, the cam plate 69 is formed of a base circle portion 69a and a sine curve portion 69b, and when the roller 88 travels in contact with the base circle portion 69a, the lever 88a remains parallel to the base circle portion 69a in the same state. Therefore, the drive bevel gear 90 and thus the chuck portion 68 do not rotate. Roller 88 is the base circle part 69a
When the roller travels in contact with the sine curve portion 69b from
With the rotation of 8, the lever 88a moves, and the driving bevel gear 90, and eventually the driven bevel gear 92 meshing with the driving bevel gear 90 rotates, and the chuck portion 68 is directly sold to the arm portion 67 via the support shaft 91 on a plane. Is configured to rotate.

Then, in a range in which the arm portion 67 turns 90 ° from the tablet supply portion 20 (and the preheater portion 21) side to the vertical position, the base circle portion 69b and the roller 88 abut on each other, and 90 ° from the vertical position to the upper surface of the outloader portion 16. In the revolving range, the sine curve portion 69b and the roller 88 are configured to abut each other.

Thereby, as shown in FIG. 20, after the pawl 72 is closed and the resin tablet 29 from the tablet stocker unit 19 is gripped by the chuck unit 68, the rotation arm 67 shown in FIG. 21 rotates to the vertical position. During the rotation of the rotary arm 67 from the vertical position shown in FIG. 21 to the position shown in FIG. 20, and conversely, as shown in FIGS.
Even when traveling on the base circle portion 69a, the bevel gear 89, and thus the chuck portion 68, do not rotate, and only the rotary arm 67 turns while maintaining the resin tablet 29 in a horizontal state, from the vertical position shown in FIG. During the rotation of the resin tablet 29 shown in FIG. 22 to the position where the resin tablet 29 is charged into the charging pot 60 of the outloader section 16 and vice versa, as shown in FIGS. When the roller 88 runs on the sinusoidal curve portion 69b, the lever 88a swings.
9.Then, the chuck portion 68 is rotated, whereby the resin tablet 29 is rotated so as to be in a vertical state at the position shown in FIG.
Into the input pot 60.

Next, the resin tablets 29 stored in the tablet stocker section 19 shown in FIGS. 24 to 26 are taken out one by one, and preheated by the preheater section 21. Thereafter, the preheated resin tablet 29 is transferred to the outloader section 16 as shown in FIG. Tablet input pot
This shows the movement up to 60.

First, as shown in FIG. 24, the tablet supply section 20 is moved to the side of the tablet stocker section 19, and the rotating arm 67 is moved to the tablet receiving section of the tablet stocker section 19.
The resin tablet 29 on the tablet receiver 19b is gripped by turning the 90 ° in the direction of the 19b side and closing the claws 72 of the chap portion 68 as described above, and in that state, the pulse motor 70
To rotate the rotary arm 67 until it becomes vertical. At this time, the resin tablet 29 is gripped while being held in a horizontal state as described above.

Then, while holding the resin tablet 29, the tablet supply section 20 is moved via the movable body 66 along the guide rail 66a to a position in front of the preheater section 21, as shown in FIG.

Thereafter, the rotary arm 67 is turned 90 ° in the direction of the pre-heater section 21 via the pulse motor 70, and further the chuck section 68 is rotated.
To release the grip of the resin tablet 29, thereby placing the resin tablet 29 on the electrode 71 of the pre-heater section 21. The pre-heater section 21 allows the resin tablet 29 to be placed on the electrode 71. Preheat. At this time, the delivery is performed while the resin tablet 29 is held in a horizontal state as described above.

After placing the resin tablet 29 on the electrode 71, the rotating arm 67 reversely rotates 90 ° and returns to the vertical position. During the preheating, the rotating arm 67 keeps this state and stands by the side of the preheater unit 21.

When the preheating is completed by the preheater unit 21, the rotating arm 67 is turned again by 90 ° in the direction of the preheater unit 21 and the claws 72 of the chuck unit 68 are closed, so that the preheated resin tablet 29 is held by the chuck unit 68. After that, as shown in FIG. 26, the rotating arm 67 is rotated by 180 ° in the vertical direction, and the chuck portion 68 is positioned on the outloader portion 16 waiting on the cull / runner separating portion 17. Become.

At this time, as described above, the sine curve portion 69b and the roller 88 come into contact with each other, and as the roller 88 travels, the lever 88a swings and the bevel gear 90, and eventually the bevel gear 92 meshing with the bevel gear 90 rotates. As a result, the chuck portion 68 rotates on a plane orthogonal to the arm portion 67, whereby the resin tablet 29 rotates 90 ° from the horizontal state to the vertical state.

Then, in this state, the jaws 72 of the chuck portion 68 are opened to drop the resin tablet 29, and the resin tablet 29 is thrown into the throwing pot 60 of the outloader portion 16 disposed below, thereby completing a series of operations. Further, the operation returns to the position where the resin tablet 29 is supplied from the tablet stocker unit 19 and the operation from the beginning is performed.

This diameter is constant even if the weight of the resin tablet 29 changes, and the height is changed.
Since the claw 72 is chucked in the diameter direction of the resin tablet 29, the type switching operation is not required.

The control unit 24 includes, for each type of the lead frame 29,
Width, length, pitch information and the like are stored, and thereby, the opening / closing amount of the roller opening / closing mechanism of the inloader unit 13, the feed amount of the inloader body, and the feed amount of the outloader unit 16 are controlled. ing.

Thus, the lead frames 25 taken out one by one from the magazine 26 of the frame loader unit 12 by the in-loader unit 13 are supplied to the mold 14. On the other hand, the resin tablets 29 taken out one by one from the tablet stocker unit 19 by the tablet supply unit 20 are preheated by the preheater unit 21 and then supplied to the mold 14 by the tablet supply unit 20 and the outload unit 16.

Then, a mold press 15 is formed by the mold 14.
The molded product 61 molded through is carried to the cull / runner separation unit 17 by the outloader unit 16,
Here, after the cull runner 61a is separated, the separated molded product 28 is again transported to the storage stocker unit 18 by the outloader unit 16 and stored therein, and the parting surface of the mold 14 is die-mounted. It is configured to be cleaned by the cleaner section 22.

〔The invention's effect〕

Since the present invention is configured as described above, supply of the lead frame and the resin tablet to the molding die, molding by the molding die, removal of the molded product from the molding die, and removal of the・
Up to storage of the molded product after removal of the runner can be performed completely automatically, thereby improving productivity and quality.

Furthermore, by performing the process from removal of the lead frame to removal of the molding and the cull / runner from the removal of the cull / runner to the storage of the molded product after the removal, it is possible to reduce the size of the molding die and the time for changing the type of product. Shortened,
In addition, there is an effect that the size of the entire molding apparatus can be reduced.

[Brief description of the drawings]

1 to 26 show an embodiment of the present invention. FIG. 1 is an overall perspective view, FIG. 2 is a schematic plan view thereof, FIG. 3 is a perspective view showing a frame loader section, and FIGS. 6 shows an inloader section, FIG. 4 is an overall perspective view, FIG. 5 is a perspective view showing a holding bar, FIG. 6 is a partial cross-sectional front view, FIG. 7 is a perspective view showing a transfer section, FIG. 8 is a plan view showing a state in which the frame is taken out from the frame loader unit, FIG. 9 and FIG.
10 is a perspective view showing a series of movements of the inloader section, FIG. 11 is a perspective view showing a mold, FIGS. 12 (a) to 12 (c) are front views showing different parts of the mold press, and FIG. FIG. 14 and FIG. 14 show the outloader unit, FIG. 13 is a perspective view,
FIG. 14 is a cross-sectional view showing the relationship with the mold at the same time,
FIG. 15 is a perspective view showing a cull / runner separating section, FIGS. 16 and 17 are perspective views in a state where an outloader section is located at both ends, FIG. 18 is a sectional view of a tablet stocker section, and FIG.
19 to 23 show the tablet supply section, FIG. 19 is a perspective view, FIGS. 20 to 22 are perspective views in different operating states, FIG.
23 (a) to (c) are explanatory views showing the relationship between the roller position and the chuck section in different operating states, and FIGS. 24 to 26 are perspective views showing a series of movements of the tablet supply section.
27 to 29 show a conventional example, FIG. 27 is a plan view of a loading jig, FIG. 28 is a front view of a molding apparatus, and FIG.
The figure is a plan view of the molded product. 12 ... Frame loader section, 13 ... In loader section, 14 ...
Mold mold, 14a …… Mold lower mold, 14b …… Mold upper mold, 15 …… Mold press, 15a …… Plunger, 16 …… Outloader section, 17 …… Cull runner separation section, 17c …… Push plate, 18… Storage stocker part, 19… Tablet stocker part, 19a …… Stocker, 1
9b Tablet receiver, 19c Stopper, 20 Tablet supply section, 21 Preheater section, 22 Die cleaner section, 23 Transfer section, 24 Control section, 25 Lead frame, 26 …… Magazine, 27 …… Storage stocker,
28 …… Molded product, 29 …… Resin tablet, 30 ……
Input pot, 31… Main guide rail, 32… Slide block, 39, 40… Moving bar, 45, 46… Holding bar,
48 ... Swing lever, 50,53 ... V-groove roller, 57 ... Screw screw, 60 ... Pot, 61 ... Molded product, 62 ... Vacuum pad, 66 ... Movable body, 67 ... Rotating arm, 68 ... Chuck, 69 ... Cam plate, 71 ... Electrode, 72 ... Claw, 73 ... Elevator, 88 ... Roller, 91 ...
… Props.

Claims (2)

(57) [Claims] In an automatic molding apparatus for sealing a semiconductor device after completion of wire bonding with a resin, wire-bonded lead frames housed in a lead frame magazine of a frame loader section are directly taken out one by one from the lead frame magazine. And an inloader section for directly supplying the lead frame to a predetermined position on the lower mold of the mold attached to the mold press. An outloader section having a resin tablet charging pot for transporting to the runner separation section and storing the molded product after removing the cull and runner in the storage stocker section, and a runner gate which is an unnecessary portion of the molded product. A cal runner separation part to separate from the molded product, A resin tablet supply unit for taking out the resin tablets one by one from the tablet stocker unit in which the resin tablets are stacked and stored, and charging the resin tablets into the resin tablet input pot of the outloader unit; and the inloader unit includes the frame loader unit and the mold. A single guide that guides the inloader section when moving between the molds and guides the outloader section when the outloader section moves between the mold die and the cull / runner separating section. From a lead frame magazine, in which a lead frame of a predetermined length is accommodated, to molding of the mold by a mold and storage of the molded product in a storage stocker unit, in units of one frame. Automatic mold according to the description, characterized in that it is performed one by one Location. 2. The frame loader unit and the inloader unit further include an opening / closing adjustment mechanism for adjusting a holding opening / closing amount required to hold the lead frame in response to storage information regarding dimensions such as a width of the lead frame. The automatic molding apparatus according to claim 1, further comprising: