KR100798207B1 - Device and method for supplying resign materials - Google Patents

Abstract

The present invention provides a resin material supplying apparatus and method capable of supplying a predetermined amount of resin material without requiring storage of various tablets, and eliminating the need for sorting and managing damaged products.

The resin material supply device 20 and the method of the present invention include a metering unit 21 and a metering port which allow the resin material 71 to be loaded into each metering port 25 so as to load a predetermined amount of the resin material 71. The stirring was performed by supplying the resin material 71 to the stirring cup 32 from the 25 and protruding the stirring rod 37a from the tip in the stirring cup 32 to allow stirring by rotation of each plunger 37. The unit 31 and the forward / reversely movable motor 52 allow the forward and backward movement of the stirring unit 31 while moving from the metering unit 21 to the molding die 61, and the forward and reverse direction. Supply which enables the stirring and fusion of the molten resin material 71 in the stirring cup 32 toward the mold port 62 of the molding die 61 to the plunger 37 by the rotatable shanghai motor 45. It consists of the unit 41.

  Resin material, supply device, supply method

Description

DEVICE AND METHOD FOR SUPPLYING RESIGN MATERIALS}

1 is an explanatory view showing a side of a resin material supply apparatus according to an embodiment of the present invention.

FIG. 2 is a view seen from arrow A of FIG. 1.

FIG. 3 is a view seen from arrow B of FIG. 1.

4 is a view seen from the arrow C of FIG.

5 is a cross-sectional view showing molding of a resin material according to the prior art.

♣ Explanation of symbols for main part of drawing ♣

20: supply device of resin material 21: weighing unit

25: Weighing port 31: Stirring unit

32: stirring cup 37: plunger

37a: Stirring rod 41: Supply unit

45: up and down movement motor 51: moving unit

52: mobile motor 61: molding mold

62: mold port 71: resin material

The present invention relates to an apparatus and a method for supplying a resin mold while measuring and melting and melting a resin material during molding of a resin seal such as an electronic component.

Conventionally, such a thing as that of FIG. 5 has been used widely.

The molding mold 61 constituting the resin seal molding mechanism shown in FIG. 5 is provided so that the upper mold 61A and the lower mold 61B can be separated and combined, and the upper mold 61A and 61B are respectively provided. A plurality of cast cavities 63 are provided, and a plurality of mold ports 62 are provided between the cavities 63 of the lower mold 61B. The port 62 is connected to the cavity 63 via the runner 64 and the gate 65.

Therefore, the tablet 72 which is a resin material is thrown into the mold port 62 of the molding die 61 heated and maintained at a high temperature, and the plunger 67 which is slidably inserted into the mold port 62 is inserted. By operating, ascending toward the upper mold 61A as shown by the arrow, the tablet 97 is pressurized and melted by heating from the molding mold 61, and a lead frame 63a in which an electronic component or the like is bonded in advance is disposed. The inside of the cavity 63 is filled via the runner 64 and the gate 65 to form a resin seal.

However, in such conventional resin seal molding, since the resin material is used as the tablet 72, various kinds of tablets 72 having a size suitable for the capacity of the cavity 63 of the molding die 61 of various molded articles can be stored. There is a need.                         

In addition, during transportation or storage of the tablet 72, in particular, the edge portion is damaged, the weight is reduced, and a short shot becomes a defective product. Therefore, it is also necessary to manage the tablet 72 by sorting the damaged product.

Therefore, the present invention does not require the storage of various tablets and does not require the sorting management of the damaged products, and can supply a predetermined amount of resin material and can improve the molding quality. The purpose is to provide.

In order to achieve the above object, the present invention according to claim 1, in the supply apparatus of the resin material,

A metering unit for loading a predetermined amount of the resin material in each of the metering ports arranged below, via a metering means in which a screw is inserted into a metering tube under the hopper storing the resin material;

Each said plunger which protrudes a stirring rod from the front end via an arrangement means and a stirring means in which a plunger is inserted into the stirring cup supplied with the resin material between a plurality of stirring cups arranged in parallel with the port; A stirring unit which enables the stirring by the rotation of,

A moving unit which enables the moving of the stirring unit to move forward and backward while the molding unit is moved from the weighing unit to the molding die via a pulley or a belt installed on the shaft of the motor capable of forward and reverse rotation;                     

It characterized in that it comprises a supply unit which enables the extrusion supply of the resin material in the stirring cup to the mold port of the molding die to the plunger via the pulley or the belt is installed on the motor which is mounted on the forward and reverse rotation motor. .

In such a thing, since the resin material is measured, stirred and melted and supplied to the molding die, it is not necessary to use a resin material that is previously weighed and tableted.

Here, the resin material refers to the molding material for seal molding of electronic components as an example, and a thermosetting epoxy resin is common.

In addition, in the present invention, a powder or granular material is used as the shape of the molding material, and the temperature of the stirring cup is kept at about 120 ° C, stirred and melted, and the molding mold temperature is stored at about 180 ° C for curing. I often use).

Invention of Claim 2 in the supply apparatus of the resin material of Claim 1,

The metering means has a screw connected to a metering motor which penetrates the inside of the hopper vertically and reaches the lower end of the metering tube installed at the lower part of the hopper to form a metering unit, and at the lower end of the metering tube, it slides downward And a metering port provided with a shutter plate to be opened and closed to form a port portion capable of moving forward and backward.

In such a thing, a screw is inserted into the measuring cylinder and rotated so that a predetermined amount of the resin material can be weighed and loaded into the weighing port, so that defects or deviations in weight may occur, such as a preformed tablet (resin material). There is no need for screening or management.

Invention of Claim 3 in the supply apparatus of the resin material of Claim 1,

The stirring means is connected to the lower portion of the metering port moved to the metering port moving cylinder, by a pulley or a belt mounted on the shaft of the cup moving motor, the lower connection is supplied to the resin material and installed on the guide post For moving the plurality of stirring cups to the lower position of the plunger mounted on the plate, protruding the stirring rod from the tip of the plunger by the operation of the stirring cylinder mounted on the lower connecting plate, for stirring with a gear The gears mounted on the plungers are engaged with each other by the operation of the motor, and the plungers are rotated to stir the resin material in the stirring cup.

In such a thing, it can stir by rotation of the plunger which protruded the resin material supplied to the stirring cup. Therefore, homogeneous stirring and melting can be performed quickly.

Invention of Claim 4 is a supply apparatus of the resin material of Claim 1,

The moving means includes a moving motor mounted on a stay extending downward from a plurality of rails on which the traveling vehicle on which the stirring unit is mounted is mounted, and fitted to the belt via a pulley or a belt attached to the motor. A, characterized in that by the forward and reverse rotation of the motor for moving forward and backward movement from the position of the metering unit to the molding die.

In such a thing, since the stirring unit mounted on the traveling trolley is engaged with the belt, the forward and reverse action of the motor is immediately transmitted, and high speed movement and accurate movement position can be determined.

Invention of Claim 5 is a supply apparatus of the resin material of Claim 1,

The shangdong means is provided with a ball screw, which is installed in parallel between a plurality of the guide posts installed in the stirring unit, screwed the ball screw nut to the ball screw, and heats the lower connection plate attached to the screw nut. The plurality of the plungers mounted in (i) are moved downwards through pulleys or belts mounted on the shaft of the Shanghai-dong motor, and the resin material melted from the stirring cup is slid to open and close. The shutter plate is slidably opened to be supplied to the mold port of the molding die.

In such a thing, since the ball screw mechanism connected to the motor for up-and-down movement is used, the lower connection board in which the plurality of plungers are mounted in a row can be strongly and accurately lowered simultaneously.

Invention of Claim 6 is the supply apparatus of the resin material of Claims 1-5,

The resin material is characterized in that the powder or granular particles.                     

In such a thing, it is set as the powder or granular resin material, and material cost becomes low.

Invention of Claim 7 is a supply method of a resin material,

A weighing process for weighing the resin material stored in the hopper and filling it into the weighing port;

A stirring step of supplying the metered resin material to a plurality of stirring cups and stirring and melting through a stirring unit;

A moving step of moving the stirring unit forward and backward from the metering port area to the molding die;

A feed step of extruding and supplying the resin material melted into the stirring cup to a mold port of the molding die,

Even if the material is in the form of powder or granules, a predetermined amount is measured, stirred and melted to enable molding.

In such a thing, since it is possible to use a powder or granules without being influenced by a tablet as a resin material, it is freed from the possession management of various kinds of tablets, and damage and weight management are unnecessary, and management cost can be reduced. have.

In addition, since the resin material can be used regardless of the shape, the material cost becomes low.

The supply apparatus of the resin material concerning the Example of this invention is demonstrated based on FIG.

In Fig. 1, the resin material supply device 20 introduces the resin material 71 stored in the hopper 22 into the metering tube 24a by the rotation of the screw 24, and the screw in the tube 24a. The metering unit 21 which is metered by the rotational speed of the battery and charged in the metering port 25,

The measured resin material 71 is supplied between the measuring port 25 and the stirring cup 32, and the plunger 33 which protrudes the stirring rod from the front end is inserted in this cup 32, it rotates, and it stirs and melts Unit 31,

A moving unit 51 which moves toward the molding die 61 while operating the stirring unit 31;

When the stirring unit 31 is moved and the stirring cup 32 is placed on the mold port 62 installed in the molding die 61, the plunger 33 attached to the stirring unit 31 is operated to And a supply unit 41 for supplying the molten stirring cup 32 with the resin material 71 to the mold port 62.

The molten resin material 71 supplied to the mold port 62 is extruded into the cavity 63 via the molding plunger 67 inserted into the molding mold 61, similarly to the conventional molding mold shown in FIG. 5. It is configured to mold.

Below, each structural unit is demonstrated in detail, respectively.

(Measurement unit)

This is mainly explained with reference to Figs. 1 and 2 which show the side and front face of the metering unit (as seen from the arrow A in Fig. 1).

The metering unit 21 is mounted so that a plurality of cases 29 are assembled and suspended from above from below.                     

22 is a hopper, and the supply port 22a of the resin material 71 which penetrates is provided in the upper part of the hopper 22, and the resin material 71 can be supplied from the exterior.

Moreover, the screw 24 which penetrates up and down is provided in the center of the hopper 22, The upper part of this screw 24 is connected with the coupling which penetrated the rotating disk 22b, and the metering motor 23 is carried out. Is wearing. In addition, a plurality of crushing pins 22c are vertically suspended in the disk 22b so that the crushing pins 22c enter the resin material 71 of the hopper 22.

Therefore, when the screw 24 is rotated by the operation of the metering motor 23, the crushing pin 22c also rotates around the screw 22 to crush the resin material 71 in the hopper 22, It is to be easily engaged with the screw (24).

Moreover, this screw 24 is inserted in the metering tube 24a provided in the lower part, and the predetermined amount of resin material 71 is made | formed by the rotation speed of the screw 24 in this metering tube 24a. The metering section 21A is configured to allow metering.

The metering unit 21A thus constructed and integrally assembled is provided with a ball screw nut 27b on the right side of the metering unit 21A so as to be movable on the lower frame of the case 29, and to the nut 27b. The ball screw 27a was assembled by screwing. Moreover, the sliding part is provided in the left side of 21 A of metering parts, and it is made to be able to slide with the rail 29a provided on the lower frame of the case 29. As shown in FIG.

Accordingly, by operating the feed motor 27 mounted on the case 29 to rotate the ball screw 27a, the metering portion 21A slides on the rail 29a to the left side and is arranged in a lower part. The metering section 21A moves over each metering port 25 to fill the metered resin material 71 from the metering tube 24a to each metering port 25.

Moreover, the port part 25A is formed in the lower end surface of this hopper 25 by mounting the shutter plate 26a which slides by the opening-closing cylinder 26, and opens and closes a lower end opening.

As shown in Fig. 2, the port portion 25A operates the port moving cylinder 28 to move the respective metering ports 25 filled with the resin material 71 and arranged in the right direction. On the stirring cup 32 which has been moved in the left direction (see Fig. 3), the lower end surface of the metering port 25 is operated to open and close the shutter plate 26a, and the metering port 25 The inner resin material 71 is supplied into the stirring cup 32.

(Stirring Unit)

This is mainly described with reference to Figs. 2 and 3 which show the side and the front of the stirring unit (as seen from the arrow B in Fig. 1).

31 is a stirring unit, 32 is a stirring cup arranged to receive the resin material 71 from the metering port 25, 33 is a cup moving motor for moving the cup 32 to the left and right directions, 34 is a stirring cup arranged It is four guide posts which were installed upright in the square position so as to surround (32), and 35 is the upper connection board which connects and fixes these four posts 34 at the upper end part.

Moreover, 36 is a lower connection plate, and is assembled so that it can slide with four guide posts 34, and it arrange | positions at the inner four positions of these four guide posts 34 with the stirring cylinder 36a, and a center part. The plunger 37 and the stirring motor 38 are mounted.

The large diameter gear 38a is attached to the motor 38, and the small diameter gear 38b is attached to the upper end of each plunger 37, respectively, and the adjacent gears 38a and 38b are respectively provided. The gears 38a and 38b are engaged with each other by engaging.

Therefore, the movable plate 44 is lowered by the operation of the stirring cylinder 36a, and the stirring rod 37a protrudes, and at the same time, each plunger 37 is rotated by the operation of the stirring motor 38, and the stirring is performed. The resin material 71 in the cup 32 is agitated and melted together with external heating (not shown).

39 is a plunger part movement cylinder, and is provided before and after the stirring unit 31, respectively. And the stirring unit 31 attached to the plunger 37 is made to move forward and backward in this movement cylinder 39 to the left-right direction.

Therefore, as shown in Fig. 3, the cylinder 39 is extended so as to be fitted with the stirring cup 32 in the left and right directions during stirring. In addition, as shown in FIG. 4, on the molding die 61, the moving cylinder 39 is extended so that position matching with the metal mold | die port 62 is possible.

In addition, when the resin material 71 (not shown) is weighed, the moving cylinder 39 is shrunk to return the stirring unit 31 to operate to avoid interference between the stirring unit 31 and the measuring unit 21. I make it a constitution.

(Moving unit)                     

This is mainly described with reference to Figs. 1 and 3 showing the side and the front of the mobile unit (as seen from the arrow B in Fig. 1).

51 is a pulley mounted on the shaft of the motor 52 by mounting the motor 52 for movement in the stay 58 extended downward from the rails 56 and 57 on which the moving unit and the moving cart 31A are mounted. The timing belt 54 is hung between the 53a and the two pulleys 53b and 53c attached to both ends of the rail 56, and between the two pulleys 53b and 53c of the belt 54. The belt clamp 55 and the timing belt 54 extended from the moving cart 31A are fastened.

Accordingly, by the forward and reverse rotation of the moving motor 52, the stirring unit 31 mounted on the moving cart 31A is braked by the limit switch 56a provided before and after, and the stopper 56b provided at the front and rear ends. It is controlled by the control panel), and it is set as the structure which advances and retracts on the rails 56 and 57 while it reaches the shaping | molding die 61 from the measurement unit 21 position.

(Supply unit)

This is mainly described with reference to Figs. 1 and 4 which show the side and the front of the supply unit (as seen from the arrow C in Fig. 1).

41 is a supply unit, which is assembled in the stirring unit 31 and moves integrally with the stirring unit 31 to the position of the molding die 61 shown by the dashed-dotted line in FIG.

42 is a ball screw, 43 is a ball screw nut, and it connected with the shanghai copper motor 45 via the pulley 45a and the belt 45b. In addition, a lower connecting plate 36 is attached to the ball screw nut 43, and a plurality of plungers 37 are arranged and attached to the connecting plate 36.

Therefore, when the shank east motor 45 is operated, the ball screw nut 43 with the lower connection plate 36 attached thereto and the plurality of string-like plungers 37 is mounted downward by the rotation of the ball screw 42. In this manner, the shutter plate 32b (see FIG. 3) under the stirring cup 32 is opened to extrude the resin material 71 in the stirring cup 32.

(Molding mold)

This is mainly explained with reference to Figs. 1 and 4 which show the side face and the front face (as seen from the arrow C of Fig. 1).

61 is a mold die 62 and 62 is a mold port 62 to which a resin material 71 is supplied, and a molding plunger 67 is fitted into the port 62. 63 is a cavity 63 cast in the shape of a molded article, which is assembled to the chase block 6, and is separated from the mold main body 61A together with the block 66 so that the mold can be replaced.

Therefore, the resin material 71 supplied to the mold port 62 is pushed into the cavity 63 which is heated by the molding plunger 67 and kept at a high temperature, and heat-cured to complete molding.

Next, the operation will be described.

As described above, the powdery or granular resin material 71 supplied to the metering unit 21A of the metering unit 21 includes the stirring unit 31, the moving unit 51, and the supply unit 41, respectively. By performing a series of operations, a predetermined amount is supplied to the molding die 61 at an appropriate melting temperature, thereby acting to form a good molded article.                     

These series of operations are performed by the operation of the metering motor 23 in the hopper 22 in the resin material 71 supplied to the hopper 22 of the metering unit 21 as shown in FIG. Around the screw 24, the crushing pin 22c is also rotated so that the resin material 71 is broken without being bridged, and is easily engaged with the screw 24 and supplied. The screw 24 weighs a predetermined amount at a predetermined rotational speed in the metering tube 24a and is loaded from the metering section 21A into the metering port 25 of the port section 25A.

In addition, by the operation of the transfer motor 27, the metering section 21A moves over the upper end surface 25a of each metering port and loads all the metering ports 25 with the resin material 71.

When each metering port 25 is loaded, the port moving cylinder 28 is operated to move the port portion 25A to the right, and the cup moving motor 33 (see FIG. 3) is also operated to operate the stirring cup 32. ) Is moved to the left and right to match, and the cylinder plate 26a is opened by operating the opening and closing cylinder 26 at the lower portion of the metering port 25 to receive the metered resin material 71. Then, it moves to return to the right direction and is located under the plunger 37.

As shown in Fig. 3, four stirring bar cylinders 36a operate to protrude the stirring bar 37a from the tip of the plunger 37, and then the stirring motor (with the gear 38a mounted) ( 38 is operated, the plunger 37 is rotated via each gear 38b attached to each plunger 37, and the resin material 71 in the stirring cup 32 is stirred and melted.

At this time, the stirring cup 32 is a temperature at which the resin material 71 is melted, and is heated to about 120 ° C.                     

Therefore, in the stirring unit 31, the movement motor 52 of the moving unit 51 is quickly operated, stirring, and the timing belt 54 is moved to the position which the limit switch 56a is controlled toward the front.

After the stirring melts, the stirring cylinder 36a is operated to raise the movable plate 44, and the stirring rod 37a is inserted into the cylinder 37 to be buried.

Then, at the stop position of the stirring unit 31 on the molding die 61, the supply unit 41 assembled to the stirring unit 31 is operated.

That is, the ball screw nut 43 which moves down by rotating the ball screw 42 through the pulley 45a and 45b attached to the shaft by operating the shanghai motor 45, The mold port provided with the resin material 71 melted into the stirring cup 32 in the lower mold 61B of the molding die 61 by lowering each plunger 37 mounted on the lower connecting plate 36 at a time. 62).

Then, the supplying stirring unit 31 moves the timing belt 54 toward the rear by the reverse rotation operation of the moving motor 52, and stops by the braking of the limit switch 56a. It moves backward to the position of 25 A of port parts of this.

Then, the lower mold 61B of the molding die 61 is raised toward the upper mold 61A (not shown) to be molded, and the molding plunger 67 inserted into the mold port 62 of the lower mold 61B is operated. The supplied molten resin material 71 is extruded into the cavity 63 to be molded and cured.

In addition, the temperature of the cavity 63 is about 180 degreeC in order to heat-harden.

In addition, resin molding is performed by repeating the above-described operation floor.

As described above, in the invention described in claim 1, since the resin material is weighed, stirred and melted and supplied to the molding die, it is not necessary to use a resin material formed of a tablet that has been weighed and molded in advance. Therefore, not only the resin material of any form can be used but also the variation in weight is eliminated and the quality is stabilized.

The invention described in claim 2 is to insert a screw into a weighing cylinder and rotate it so that a predetermined amount of the resin material can be weighed and loaded into the weighing port. As with a tablet (resin material) formed in advance, There is no deviation and there is no need to sort. Therefore, the sorting process becomes unnecessary, and the cost can be reduced.

Invention of Claim 3 can be stirred by rotation of the plunger which protruded the feeder; s resin material into a stirring cup. Therefore, stirring and melting can be performed quickly and evenly, and the quality is stable.

In the invention according to claim 4, since the stirring unit mounted on the traveling cart is engaged with the belt, it is possible to determine a high speed movement and a quick movement position. Therefore, productivity can be improved.

Since the invention of Claim 5 uses the ball screw mechanism connected to the motor for up-and-down movement, the lower connecting plate in which the several plunger is mounted can be lowered powerfully and correctly simultaneously. Therefore, the operation of many plungers is constant and quality can be stabilized.                     

Invention of Claim 6 can be made into a tablet or granular resin material, and does not need to form into a tablet, and can reduce material cost.

The invention according to claim 7 can be used as a resin material, regardless of conventional tablets, and can be used as powder or granules. Reduction can be achieved and a resin material can be purchased regardless of the form, resulting in a molding method having a low material cost.

In addition, the resin port can be used as it is by replacing the conventional mold port of the gypsum mold with a tablet, and it is not necessary to make the molding mold special, and it can be used in various molding molds, so that the molding area is wide and the cost can be reduced. have.

Claims (7)

A metering unit for loading a predetermined amount of the resin material in each of the metering ports arranged below, via a metering means in which a screw is inserted into a metering tube under the hopper storing the resin material; Each said plunger which protrudes a stirring rod from the front end via an arrangement means and a stirring means in which a plunger is inserted into the stirring cup supplied with the resin material between a plurality of stirring cups arranged in parallel with the port; A stirring unit which enables the stirring by the rotation of, A moving unit which enables the moving of the stirring unit to move forward and backward while the molding unit is moved from the weighing unit to the molding die via a pulley or a belt installed on the shaft of the motor capable of forward and reverse rotation; Characterized in that it comprises a supply unit which allows extrusion of the resin material in the stirring cup to the mold port of the molding die to the plunger via a pulley or a belt provided with a pulley or a belt mounted on a motor capable of forward and reverse rotation. Supply device of resin material. The method of claim 1, The metering means has a screw connected to a metering motor which penetrates the inside of the hopper vertically and reaches the lower end of the metering tube installed at the lower part of the hopper to form a metering unit, and at the lower end of the metering tube, it slides to the lower surface. And a forward and backward movable port portion in which a metering port having a shutter plate that is opened and closed is formed. The method of claim 1, The stirring means moves a stirring cup by a pulley or a belt mounted to a shaft of a cup moving motor in a lower portion of the measuring port moved to a measuring port moving cylinder, and receives the resin material and is connected to a lower guide plate. The plurality of stirring cups are moved to the lower position of the plunger mounted on the plunger, and the stirring rod is protruded from the tip of the plunger by the operation of the stirring cylinder mounted on the lower connecting plate, and the stirring motor equipped with a gear And gears of the gears mounted on the plungers to engage each other, and the plungers rotate to stir the resin material in the stirring cup. The method of claim 1, The moving means includes a moving motor mounted on a stay extending downward from a plurality of rails on which the traveling vehicle on which the stirring unit is mounted is mounted, and fitted to the belt via a pulley or a belt attached to the motor. And the forward and backward movement of the moving motor from the position of the metering unit to the molding die by forward and reverse rotation of the moving motor. The method of claim 1, The shandong movement means is provided with a ball screw, which is installed side by side between the plurality of guide posts installed in the stirring unit, screwing the ball screw nut to the ball screw, and heat the lower connection plate attached to the screw nut The plurality of the plungers, which are built and mounted, move downward through a pulley or a belt mounted on a shaft of a shanghai copper motor, and a shutter plate which is opened and closed by sliding the molten resin material from the stirring cup on the lower surface of the stirring cup. A device for supplying a resin material, characterized in that the sliding port is opened to be supplied to the mold port of the molding die. The method according to any one of claims 1 to 5, And said resin material is powder or granular particles. A weighing process for weighing the resin material stored in the hopper and filling it into the weighing port; A stirring step of supplying the metered resin material to a plurality of stirring cups and stirring and melting through a stirring unit; A moving step of moving the stirring unit forward and backward from the metering port area to the molding die; A feed step of extruding and supplying the resin material melted into the stirring cup to a mold port of the molding die, A method of supplying a resin material, characterized in that the resin material has a step of measuring a predetermined amount and stirring and melting the measured resin material even if the shape of the resin material is a powder or granules.

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