JPS6241084B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tablet feeding device and a molding machine having the same, and more particularly to a tablet feeding device that heats and feeds a tablet made of resin into a pot of a resin mold type, and a molding machine incorporating the same. It is related to.

In the case of a resin mold machine used in the manufacture of resin mold type semiconductor devices, etc., a cylindrical resin tablet is heated and placed in a pot of the resin mold type, and then a plunger is pushed into the pot to crush the tablet. Resin molding is performed by melting the resin together, pressurizing it, and press-fitting it into a mold.

By the way, conventionally, the tablet is fed into the pot after the tablet is heated by a heating mechanism.
The operator uses a clamper to grasp the tablet and carry it onto the pot, and after determining the positional relationship between the two, releases the clamper to supply the tablet into the pot.

However, this type of tablet feeding method is manual and has low workability, and because it requires the intervention of a worker, it is not suitable for automating a series of assembly operations, such as semiconductor device assembly operations.

Furthermore, since the tablet has been softened by the heat treatment, it will easily deform if it is strongly gripped by the clamper. As a result, if the tablet is loaded into the pot in a deformed state, when the tablet is crushed within the pot by the plunger, the air in the depression created when the clamper holds it will be drawn into the resin mass. , air bubbles (voids) are generated in the mold part. These air bubbles are undesirable because they make the mold (resin molded part of a package of a semiconductor device, etc.) insufficient, thereby lowering the moisture resistance of the semiconductor device and causing deterioration of its characteristics. Furthermore, if bubbles occur on the surface of the mold, they will appear as dents on the surface even though they have a covering function, reducing their commercial value and generally being discarded as products with poor appearance. This results in a decrease in mold yield and an increase in the cost of molded products.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tablet feeding device that can save labor and a molding machine incorporating the same. Another object of the present invention is to quickly transport the heated and softened tablet to the pot of a resin molding machine without deforming it, thereby molding it without containing air bubbles and producing high quality tablets. The object of the present invention is to provide a new device capable of producing molded products.

Another object of the present invention is to improve the efficiency of tablet feeding work by automatically feeding tablets to a resin molding machine, and to automate a series of assembly processes including resin molding. It is in the plan.

In order to achieve such an object, according to the present invention, a cylindrical tablet made of resin is rotated on a pair of rollers in a horizontal state such that the extending direction of the cylinder of the tablet is horizontal. a heating mechanism for heating the tablet while heating the tablet; In a tablet supply mechanism comprising a mechanism for transferring and loading the tablet in a vertical state into a pot of a mold, the mechanism for changing the direction comprises a cylindrical accommodation guide for accommodating the tablet; , a shutter for opening and closing one end of the accommodation guide, and a shutter for moving the accommodation guide from a horizontal state to a vertical position so that the one end of the accommodation guide with the shutter is on the lower side when the accommodation guide is in a vertical state. the tablet sent from the heating mechanism is accommodated from the other end of the accommodation guide when the accommodation guide is in a horizontal state, and when the shutter is closed, the tablet is rotated. It is characterized in that the direction of the accommodation guide is changed from a horizontal state to a vertical state by a mechanism. Further, the present invention is characterized in that it is a molding machine incorporating such a tablet feeding device.

In a preferred embodiment of this type of invention, a cylindrical tablet made of resin is heated on a pair of roller electrodes, and then slid on the roller electrodes to form a cylindrical storage guide having a shutter at one end. Then, the housing guide is rotated 90 degrees to stand upright, and the housing guide is placed over the pot of the resin molding machine, the housing guide and the pot are positioned, the shutter is opened, and the heated tablets housed in the housing guide are placed in the housing guide. The present invention will be described in detail below with reference to the drawings.

The figure is a schematic diagram showing a tablet feeding device which is an embodiment of the present invention. This tablet supply device is roughly divided into a heating mechanism 2 that heats a cylindrical tablet 1 made of molding resin, a transfer mechanism 3 that supplies the tablet 1 to this heating mechanism 2, and a transfer mechanism that supplies the tablet 1 heated by the heating mechanism 2. The sending-out mechanism 4 receives the tablet 1 sent out by the sending-out mechanism 4, changes the posture of the tablet 1, carries it onto the pot (tablet inlet) 6 of the mold 5 in the resin molding machine, and places the tablet 1 into the pot 6. The main component is a conveying and supplying mechanism 7 that supplies the liquid by falling naturally into the interior.

The heating mechanism 2 has a pair of rotating roller electrodes 8 arranged in parallel in the horizontal direction, and the tablet 1 is placed on the two roller electrodes 8.
The tablet 1 is heated by high frequency heating or the like while being rotated by the rotation of the tablet 1. Also,
A cylindrical carry-in guide 9 and a cylindrical carry-out guide 10 are provided at both ends of the roller electrode 8, and the tablet 1 passes through the carry-in guide 9 and is fed onto the roller electrode 8, heated and then rotated by the roller electrode 8. It is transferred while rotating above, passes through the carry-out guide, and is sent out to the conveyance supply mechanism 7. A delivery mechanism 4 having a cylinder mechanism 11 is disposed at one end of the carry-in guide 9 . The plunger 12 of this cylinder mechanism 11 moves forward and pushes the tablet 1 held out between it and the carry-in guide 9, pushes the tablet 1 into the carry-in guide 9, slides it inside the carry-in guide 9, and places it in the center of the roller electrode 8. It not only serves as a transport mechanism for transporting the tablet 1 to the storage area, but also moves forward to push the tablet 1 heated by the roller electrode 8, and transfers the heated tablet 1 from above the roller electrode 8 to the unloading guide 10. The tablet 1 is moved while being rotated, and also serves as a delivery mechanism for pushing out the tablet 1 from the end of the delivery guide 10. An elevator 13 is disposed between the cylinder mechanism 11 and the carry-in guide 9 and moves intermittently from below to above.
On this elevator 13, tablets 1 are stacked in multiple stages so that their outer peripheral surfaces are in contact with each other, and the tablets 1 are sequentially carried into the carry-in guide 9 starting from the topmost tablet 1.

On the other hand, a conveyance supply mechanism 7 is disposed at the end of the carry-out guide 10. This conveyance supply mechanism 7 has a moving plate 15 that reciprocates between the pot 6 of the mold 5 and the end portion of the discharge guide 10 by means of a conveyance cylinder mechanism 14. A support body 16 is fixed to the top surface of the distal end of the movable plate 15, and this support body 16
A rotating shaft 17 is rotatably attached to. The rotary shaft 17 can be rotated by a motor 18 that rotates in forward and reverse directions, and an arm 19 is fixed to the distal end protruding from the support 16. Arm 19
A cylindrical accommodation guide 20 is fixed to the tip. The inner diameter of the accommodation guide 20 is the same as the inner diameter of the unloading guide 10, and is also approximately the same diameter (actually slightly larger) than the inner diameter of the pot 6, so that the tablet 1 can be accommodated therein. There is. Also, the arm 19 covers the 90 degree area with the motor 1.
8, it can be rotated in forward and reverse directions, and when rotated forward, the heating guide 20 at the tip is horizontally adjacent to the end of the unloading guide 10, and when reversed, the accommodation guide 20 is placed vertically in an upright position. let In the horizontal state, the central axes of the accommodation guide 20 and the unloading guide 10 coincide with each other. Therefore, the tablet 1 sent out from the unloading guide 10 is reliably placed in this storage guide 20.
Go inside.

Further, a shutter 21 is disposed on the opposite side of the accommodation guide 20 from the tablet insertion opening. This shutter 21 is supported and movable by a shutter cylinder mechanism 23 fixed to a support arm 22 attached to the outer peripheral surface of the accommodation guide 20. Further, the shutter 21 is provided with an input port 24 through which the tablet 1 can pass, and when the shutter cylinder mechanism 23 operates, the input port 24 appears on the end surface of the accommodation guide 20.
The tablet 1 can be taken out through this slot 24. In addition, when the storage guide 20 is in the upright state, the shutter 21
is located on the lower surface thereof and is adapted to support the tablet 1 within the accommodation guide 20.

Next, the operation of the tablet feeding device and resin molding machine having such a structure will be explained. When the tablet 1 is put out right next to the carry-in guide 9 by the elevator 13, the cylinder mechanism 11 operates and the plunger 12 moves forward, pushing the tablet 1 with the push plate 23 at the tip and passing it through the carry-in guide 9. The tablet 1 is sent onto the roller electrode 8. The tablet 1 is rotated on the roller electrode 8 and heated to a predetermined temperature. After that, the plunger 12 moves forward again and the roller electrode 8
Push the upper tablet 1 and send the tablet 1 out through the delivery guide 10. At this time, since the tablet 1 is heated and softened, it may deform on the roller electrode 8 and get caught on the end face of the unloading guide 10 and not enter the unloading guide 10 properly. Even when the tablet 1 is pushed into the unloading guide 10, by continuing to rotate the roller electrode 8, the tablet 1 rotates and moves on the roller electrode 8, so even when heated to the temperature required for molding, the cylindrical It maintains its outer shape and enters the unloading guide 10 smoothly. On this occasion,
Since the accommodation guide 20 is waiting in a horizontal state at the end of the carry-out guide, the tablet 1 is placed inside this accommodation guide 20. The plunger 12 retreats and prepares for the next operation, and the elevator 13 rises one step to deliver a new tablet 1 right next to the carry-in guide 9.

On the other hand, when the tablet 1 enters the housing guide 20, it swings, the motor 18 operates, the arm 19 rotates, and the housing guide 20 stands upright. In this state, the center axis of the cylindrical tablet 1 is vertical, similar to the center line of the pot 6 of the mold 5.
Furthermore, even if the tablet 1 becomes soft and easily deformed inside the accommodation guide 20, since the accommodation guide 20 forms a cylindrical wall and surrounds the tablet 1, the cylindrical wall To maintain a cylindrical body that can be regulated and always enter the pot.

Next, the conveyance cylinder mechanism 14 operates, moves straight to the moving plate 15, and stops at a fixed position. In this state, the housing guide 20 is located directly above the pot 6 of the mold 5 in the resin molding machine, and the central axes of both are aligned. Thereafter, the shutter cylinder mechanism 23 operates to move the input port 24 into the housing guide 20.
2, the tablet 1 accommodated in the accommodation guide 20 naturally falls into the pot 6 due to its own weight. Thereafter, the shutter 21 is closed, the movable plate 15 is retracted, and the storage guide 20 returns to a horizontal state and is positioned at the end of the unloading guide 10 in preparation for transporting and supplying the next tablet. The tablet in the pot is then pressed into a resin stream, which enters the mold cavity and is molded to produce a molded product.

Therefore, as is clearer from the embodiments described above, the present invention allows for mechanical loading of the tablet into the pot of the mold, as well as automatic molding, which greatly reduces this type of work. It can save labor. To be more specific,
The present invention automatically performs all operations such as feeding tablets into a mold in a molding machine and heating the tablets before feeding. Therefore, it is highly workable and can significantly reduce the number of workers compared to conventional methods.

In addition, in the present invention, since the heated and softened tablet is held by a cylindrical storage guide, there is no deformation that would entrain air as in the conventional case, so good molding can be performed, and the molding step can be reduced. It is possible to improve the quality of retaining parts and molded products.

Note that the present invention is not limited to the above embodiments. For example, the contact surface of the accommodation guide and other items that come into direct contact with the tablet may be coated with fluororesin or the like to prevent adhesion to the softened tablet.

As described above, according to the tablet feeding device of the present invention, softened tablets can be quickly and automatically fed into a molded pot without deforming them, thereby improving work efficiency and reducing the number of workers. This can save labor. Furthermore, it is possible to improve the quality and yield of molded products. Therefore, molding costs can also be reduced.

Furthermore, by employing the tablet feeding device of the present invention, many effects can be achieved, such as the ability to consistently automate various assembly operations including molding operations.

[Brief explanation of the drawing]

The figure is a schematic view showing a tablet feeding device and a molding machine incorporating the same, which is an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Tablet, 2... Heating mechanism, 3... Transfer mechanism, 4... Delivery mechanism, 5... Mold, 6... Pot, 7... Conveyance supply mechanism, 8... Roller electrode, 9... Carry-in guide, 10... Carry-out guide, 11 ...Cylinder mechanism, 12...Plunger, 13...Elevator, 14
...Conveyance cylinder mechanism, 15...Moving plate, 16...Support, 17...Rotating shaft, 18...Motor, 19...Arm, 20...Accommodating guide, 21...Shutter, 22...
Support arm, 23... Shutter cylinder mechanism, 2
4...Input port, 25...Press plate.

Claims (1)

[Scope of Claims] 1. A heating mechanism for heating a cylindrical tablet made of resin while rotating it on a pair of rollers in a horizontal state such that the extending direction of the cylinder of the tablet is horizontal. , a mechanism for changing the direction of the tablet sent in a horizontal state from the heating mechanism to a vertical state such that the extending direction of the cylinder of the tablet is in a vertical direction; and a molding device for molding the tablet in the vertical state. In a tablet feeding mechanism comprising a mechanism for transferring and loading a tablet into a pot of a mold, the mechanism for changing the direction includes a cylindrical accommodation guide for accommodating the tablet, and a mechanism for opening and closing one end of the accommodation guide. a shutter, and a rotation mechanism for converting the accommodation guide from a horizontal state to a vertical state so that one end of the accommodation guide having the shutter is on the lower side when the accommodation guide is in the vertical state. When the housing guide is in a horizontal state, the tablet sent from the heating mechanism is stored from the other end of the housing guide, and when the shutter is closed, the rotating mechanism holds the housing guide horizontally. A tablet feeding mechanism characterized by changing direction from a vertical position to a vertical position. 2. The mechanism for transferring and loading the tablet in the vertical state into a molded pot,
The tablet, which has been turned vertically, is housed in a cylindrical guide and transferred onto the pot, and the tablet is removed from the pot by opening a shutter provided at the lower end of the transferred cylindrical guide. Claim 1 characterized in that it is formed by dropping the
Tablet feeding device as described in Section 1. 3. Claim 1 or 2, wherein the tablet is sent from the heating mechanism to the cylindrical storage guide of the direction change mechanism through a cylindrical unloading guide. Tablet feeding device as described in Section 1. 4. A heating mechanism for heating a cylindrical tablet made of resin while rotating it on a pair of rollers in a horizontal state such that the extending direction of the cylinder of the tablet is horizontal; A mechanism for changing the direction of the tablet sent in a vertical state to a vertical state such that the extending direction of the cylinder of the tablet is vertical, and a mechanism for transferring the tablet in the vertical state to a molded pot. In a molding machine incorporating a tablet feeding mechanism including a loading mechanism, the direction changing mechanism includes a cylindrical storage guide that accommodates the tablet, and a cylindrical housing guide that opens and closes one end of the housing guide. a shutter, and a rotation mechanism for converting the accommodation guide from a horizontal state to a vertical state so that one end of the accommodation guide having the shutter is on the lower side when the accommodation guide is in the vertical state. When the housing guide is in a horizontal state, the tablet sent from the heating mechanism is stored from the other end of the housing guide, and when the shutter is closed, the rotating mechanism holds the housing guide horizontally. A molding machine characterized by changing direction from a vertical position to a vertical position.