JP2001210661A - Deflasher for resin-molded part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflasher for a resin molded part, which can miniaturize a blast chamber and enhance latitude in arrangement and the like. SOLUTION: The top cover block of a blast chamber 1 is fitted with a blast nozzle 2, and the body part is arranged outside the chamber, while only the discharge part 1b is arranged inside the chamber. The blast chamber 1 contains the horizontal arrangement of a rail 5, and conveying rails 6a, 6b are arranged horizontally on both sides. The conveying rails 6a, 6b are provided with conveying pin mechanisms 7a, 7b for conveying lead frames, respectively. A used cleaner 17 is recovered from the bottom of the blast chamber 1 by a negative pressure formed by the collection blower of a dust collector, stored into the cleaner storage chamber 12, and recycled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deburring apparatus for a resin molded part, and more particularly, to a deburring of a resin molded part formed on a lead frame by blasting of a polishing material. It relates to a taking device.

[0002]

2. Description of the Related Art In a semiconductor device or the like, when resin molding is performed on a lead frame using a pair of upper and lower dies, resin pressed into the dies protrudes from joints of the dies, and this causes burrs. Become. Since the burrs deteriorate the appearance of the product, the resin mold portion is deburred before shipment.

FIG. 3 shows an electronic component in which a resin mold is formed on a lead frame. The electronic component (for example, a semiconductor device) 30 has a resin mold portion 32 formed in the center of the lead frame 31 to protect a semiconductor chip (not shown) mounted at a predetermined interval. This resin molding part 32 is performed in a resin molding step.
At the side end of the lead frame 31, the transfer holes 3
3 are provided.

As a conventional deburring apparatus for deburring a resin mold portion of an electronic component as shown in FIG. 3, there is, for example, a deburring apparatus disclosed in Japanese Patent Application Laid-Open No. Sho 62-55343. In this deburring apparatus, a wet honing chamber and a fountain chamber are continuously arranged in a semiconductor device transport route, and an abrasive dispersion liquid in which thermosetting resin particles, glass beads, and water are mixed is wetted. Deburring is performed by spraying a high-pressure water stream on the semiconductor device that is injected into the honing chamber and passes through the fountain chamber. However, in this configuration, since a wet honing room and a fountain room are essential, a large installation space is required. Further, in addition to the necessity of water system piping, a processing device for removing burrs when circulating and using used water is required, so that equipment costs cannot be reduced.

[0005] To improve such inconvenience,
For example, JP-A-5-221730 and JP-A-5-212730
There is a deburring device disclosed in Japanese Patent Publication No. 220755. These deburring devices send a large amount of air at a high speed to the blast nozzle, supply a predetermined abrasive to the blast nozzle, mix the abrasive with the supplied air, and flow the mixed fluid from the nozzle tip. Deburring is performed by injecting it into the resin mold. This configuration will be described below with reference to the drawings (simplified for ease of explanation).

FIG. 4 shows a conventional deburring device for a resin mold portion. An abrasive material storage chamber 42 is provided above the blast chamber 41 having a hopper 41a formed at the lower part. In the blast chamber 41, a transport belt 43 for passing the lead frame 41 with the resin mold portion 42 having the configuration shown in FIG. Above the intermediate portion of the conveyor belt 43, the resin mold portion 4 of the lead frame 41 passing therethrough
Blast nozzle 44 for injecting abrasive material toward
Are arranged. The blast nozzle 44 has air 47
And an abrasive supply hose 46 for supplying an abrasive. The other end of the cleaning material supply hose 46 is connected to a lower end of a hopper 42 a formed at a lower portion of the cleaning material storage chamber 42. An abrasive material 48 is stored in the hopper 42a.

At the lower end of the hopper 41a, a polishing material pool 49 is provided.
Is provided in the polishing material pool 49.
0 is connected to one end and the other end is connected to the upper part of the abrasive material storage chamber 42, and the used abrasive material stored in the abrasive material storage 49 is collected in the abrasive material storage chamber 42 through the collection pipe 50. You.
A suction chamber 51 is provided above the polishing material storage chamber 42, and is connected to a dust collector (with a dust collection blower (not shown) attached) via a suction pipe 52 connected to the suction chamber 51. Have been. In the blast nozzle 44, the blasting material 48 from the blasting material supply hose 46 is ejected toward the lead frame from the tip of the blast nozzle 44 while being sucked and mixed by the high-speed air flow supplied from the air supply hose 48. You.

[0008] The lead frame from the resin molding step is placed on a transport belt 43 by a transport mechanism (not shown) and carried into the blast chamber 1. When the lead frame reaches just below the blast nozzle 44, the air supply hose 4
5 from air and abrasive material 48 from abrasive supply hose 46
Are sprayed from the blast nozzle 44 in a mixed state, and burrs are removed by an impact force when the abrasive 48 collides with the resin mold portion. The used abrasive material 48 used for deburring and the removed burrs are collected in an abrasive material storage 49, and further passed through a recovery pipe 50.
Returned to 2. Abrasive material 48 and burrs 49
As a power source for collecting dust, a dust collecting blower of a dust collector is used. When the dust collector operates, a negative pressure is formed in the abrasive material storage chamber 42 by the rotation of the dust collection blower, and the abrasive material 48 in the abrasive material storage 49 is removed by the negative pressure.
It is sucked into 2 and reused for deburring.

[0009]

However, according to the conventional deburring apparatus, the entire blast nozzle 44 is disposed inside the blast chamber 41, and the abrasive material storage chamber 42 is integrated with the blast chamber 41. Blast room 4
1 increases in volume. For this reason, there is a problem that the deburring device becomes large. In addition, the installation place is restricted, and it becomes difficult to secure the installation space.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a deburring apparatus for a resin mold part which can reduce the size of a blast chamber and increase the degree of freedom in arrangement and the like.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a deburring apparatus for deburring a resin mold portion provided on a lead frame using an abrasive material. A blast chamber having a path for horizontally transferring, a transfer means for loading the lead frame on which the resin mold portion is formed into the path, and carrying out the electronic components and the like from the path, and a main body part of the blast chamber. A liquid formed by mixing the blasting material with a high-pressure airflow from an air supply source is disposed from the discharge unit, being disposed outside the room, and disposed in the blast chamber in a state where the discharge unit is disposed to face the path. A blast nozzle to be sprayed, and the polishing material used for deburring the resin mold portion is collected and stored from a lower portion of the blast chamber,
An abrasive material storage section for supplying the collected abrasive material to the blast nozzle, and a negative pressure forming means for generating a negative pressure for recovering the abrasive material in the blast chamber to the abrasive material storage section. A deburring apparatus for a resin mold part is provided.

According to this configuration, the main body of the blast nozzle is provided outside the room, and only the discharge unit is exposed inside the blast chamber. Since the main body of the blast nozzle is provided outside the chamber, the volume of the blast chamber can be reduced. Furthermore, the blast chamber is dedicated to blasting, and the spent blasting material is stored in the blasting material storage section independent of the blasting chamber. This also makes it possible to reduce the volume of the blasting chamber. As a result, the size of the deburring device can be reduced, and the degree of freedom in arrangement and the like can be improved. Further, cost reduction can be achieved by miniaturization.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a deburring apparatus for a resin mold section according to the present invention. In the following description, the lead frame 31 and the resin mold section 32 shown in FIG. 3 are used as the lead frame and the resin mold section. In FIG. 1, the deburring apparatus of the present invention is configured such that the blast chamber 1 designed so that the lateral width is shorter than the length of the lead frame 31 includes an upper cover block 1a, a lower cover block 1b, and a hopper 1c. Has been
A blast nozzle 2 is attached to the upper cover block 1a by a nozzle attachment part 2a, and only the discharge portion 2b is interposed in the blast chamber 1 and the main body is exposed outside the blast chamber 1. Air nozzles 3a and 3b are attached adjacent to the blast nozzle 2. Further, partition plates 4 a and 4 b for separating the tip of the blast nozzle 2 from the tip of the air nozzles 3 a and 3 b are attached to the ceiling of the blast chamber 1.

A rail 5 is disposed horizontally across the inside of the blast chamber 1, and transport pins 19a, 1
The transfer rails 6a and 6b having 9b are arranged adjacent to each other. The transport rails 6a and 6b include a transport pin mechanism 7
a, 7b are provided. The rail 5 has a portion (sliding contact portion) where the lower portion of the resin mold 32 on the lead frame 31 with the resin mold portion 32 that passes therethrough prevents the lead portion from being deformed even when subjected to a force during blast processing. In addition, a large number of holes through which the abrasive material flows are provided in portions (non-sliding portions) where the lower portion of the resin mold 32 does not contact. Thus, it is possible to prevent the abrasive material from being deposited on the rail 5.

The transport pin mechanisms 7a and 7b are provided as means for supplying / discharging the lead frame 31 with the resin mold portion 32. The transport pins 19a and 19b are provided in the transport holes 33 provided in the lead frame 31. Insert. When the transport pins 19a and 19b fit into the transport holes 33 of the lead frame 31 and move by one pitch, the lead frame 31 is sent to the unloading side by one pitch. Then, after the transport pins 19a and 19b are pulled out of the transport holes 33 of the lead frame 31, the transport pin mechanism 7
The lead frame 31 is returned to the original position by a and 7b, is inserted again into the adjacent transport hole, and moves the lead frame 31 by one pitch. Transfer rails 6a, 6b, transfer pin mechanisms 7a, 7
The transfer means constituted by b and the transfer pins 19a and 19b can simplify the structure of the transfer mechanism, so that the size of the deburring device can be reduced accordingly.

An air supply source 9 serving as a supply source of air blow air is connected to the air nozzles 3a and 3b via an air supply hose 8, and an air supply source 10 is connected to the blast nozzle 2 with an air supply hose 11. Connected through. The collection chamber 14 is connected to the hopper 1 c of the blast chamber 1, and the abrasive material storage chamber 12 is connected to the collection chamber 14. A filter 13 is provided in the upper part of the abrasive material storage chamber 12, and a dust collector (not shown) is connected to the filter 13 via a suction pipe 15. A hose fitting 18a is provided at the bottom of the abrasive material storage chamber 12, and one end of the abrasive material supply pipe 18 is attached to the hose fitting 18a.
The other end is attached to the polishing material supply port of the blast nozzle 2.

Next, the operation of the deburring apparatus having the structure shown in FIG. 1 will be described. The lead frame 31 with the resin mold portion 32 from the resin molding step is placed on the transport rail 6 a by a transport mechanism (not shown) and transported onto the rail 5. Air blow air from an air supply source 9 is discharged from air nozzles 3a and 3b provided on a ceiling portion of the blast chamber 1 via an air supply hose 8 to form an air curtain. Thereby, it is possible to prevent the cleaning material 17 (from the blast nozzle 2) from leaking out of the blast chamber 1 from the entrance and exit of the electronic components. Further, since a dust collector (not shown) is provided with a dust collecting blower, a negative pressure is generated in the blast chamber 1 by the dust collecting blower.

When the lead frame 31 with the resin mold portion 32 carried into the blast chamber 1 by driving of the transport pin mechanism 7a arrives immediately below the blast nozzle 2, the blast nozzle 2 mixes with the high-speed air and jets the blast. Scavenging material (fine particles such as resin particles, glass beads, and crushed particles of plant shells) collide with the resin mold portion 32, and the impact removes burrs that have protruded from the resin mold portion 32. In the blast nozzle 2, a fluid in which low-pressure high-speed air from the air supply source 10 and abrasive material 17 from the abrasive material supply pipe 18 are mixed is jetted toward the lead frame 31.
The burrs removed by the collision of the blast material 17 with the burrs of the resin mold portion 32 due to this injection, and the used blast material 1
Numeral 7 is sent to the collection chamber 14 through the hopper 1 c by the negative pressure generated by the dust collection blower of the dust collector, and is further stored in the bottom of the abrasive material storage chamber 12. The abrasive material 17 stored in the abrasive material storage chamber 12 is returned to the blast nozzle 2 through the abrasive material supply pipe 18 using the negative pressure as a transport source, and is reused. The demolded lead frame 31 with the resin mold portion 32 is carried into the transport rail 6b by the transport pin mechanism 7b and sent out to the next step. Although not shown in FIG. 1, it is desirable to remove the abrasive material 17 and the removed burrs attached to the lead frame by air blow or the like.

According to the embodiment of FIG. 1, only the discharge portion 2b of the blast nozzle 2 is interposed in the blast chamber 1, the main body is disposed outside the blast chamber, and the blasting material storage chamber 12 is blasted. Being independent of Chamber 1, Blast Chamber 1
The size of the deburring device can be reduced, the size of the entire deburring device can be reduced, and the cost can be reduced. Further, when constructing an integrated assembly line, the blast chamber 1 can be directly connected to the transport rails 6a and 6b, and the blast chamber storage chamber 12 is independent of the blast chamber 1. Since it can be freely arranged on the back surface of the device or the like, in-line can be easily achieved.

[Other Embodiments] FIG. 2 shows another embodiment of the present invention. In FIG. 2, only the configuration of the blast discharge unit is shown, and other configurations are omitted. As shown in FIG. 2, the blast nozzle 2 has an ejection portion 21 attached to the nozzle attachment component 20 at an angle, and changes the angle and direction at which the blast nozzle 2 collides with the resin mold on the lead frame. With this configuration, deburring is performed more efficiently than in the configuration of FIG.

In each of the above embodiments, one blast nozzle 2 is provided, but two or more blast nozzles may be provided. In this case, the discharge unit 21 of the blast nozzle 2 may be vertical as shown in FIG. 1 or may be provided with an angle as shown in FIG. In the configuration shown in FIG. 1, the rail 5, the transport rails 6a and 6b, and the transport pin mechanisms 7a and 7 serve as a mechanism for transporting the lead frame with the resin mold portion.
b and the transport pins 19a and 19b, but may have a configuration as shown in FIG. Further, instead of the transport pin mechanisms 7a and 7b and the transport pins 19a and 19b, a configuration using a sprocket may be adopted. Further, the lead frame is not limited to the configuration shown in FIG. 3, but has various shapes depending on the application and the circuit configuration. Furthermore, although a dust collector was used for the negative pressure forming means,
A vacuum pump or the like can be used instead of the dust collector.

[0022]

As described above, according to the deburring apparatus for a resin mold portion of the present invention, the blast nozzle body is disposed outside the blast chamber, and only the discharge section is interposed in the blast chamber. Furthermore, since the used abrasive material is stored in the independent abrasive material storage unit using the negative pressure generated by the negative pressure forming means, the volume of the blast chamber can be reduced, thereby The size of the deburring device can be reduced, and the cost of the deburring device can be reduced. Furthermore, even when constructing an integrated assembly line,
Easy in-line conversion is possible. In addition, since the blast room and the abrasive material storage room are separated, the degree of freedom of arrangement is improved,
The inline assembly line can be easily constructed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a deburring device for a resin mold portion of the present invention.

FIG. 2 is a configuration diagram of a main part showing another embodiment of the present invention.

FIG. 3 is a plan view showing an example of an electronic component in which a resin mold is formed on a lead frame.

FIG. 4 is a configuration diagram showing a conventional deburring device for a resin mold portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blast chamber 2 Blast nozzle 3a, 3b Air nozzle 4a, 4b Partition plate 5 Rail 6a, 6b Transport rail 7a, 7b Transport pin mechanism 9, 10 Air supply source 12 Abrasive material storage room 17 Abrasive material 18 Abrasive material supply Pipes 19a, 19b Transfer pin 31 Lead frame 32 Resin mold part 33 Transfer hole

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B29L 31:34 B29L 31:34

Claims (6)

[Claims] 1. A deburring apparatus for deburring a resin mold portion provided on a lead frame by using an abrasive material, wherein a blast chamber having a path for horizontally transporting the lead frame and the resin mold portion are provided. A state in which a transport unit that loads the formed lead frame into the path and unloads the electronic components and the like from the path and the main body unit is disposed outside the blast chamber, and a discharge unit is disposed to face the path. A blast nozzle which is disposed in the blast chamber and injects a fluid formed by mixing the polishing material with a high-pressure airflow from an air supply source from the discharge portion, and is used for deburring the resin mold portion. While collecting and storing the abrasive material from the lower part of the blast chamber,
An abrasive material storage section for supplying the collected abrasive material to the blast nozzle, and a negative pressure forming means for generating a negative pressure for recovering the abrasive material in the blast chamber to the abrasive material storage section. A deburring device for a resin mold part. 2. The deburring apparatus for a resin molded part according to claim 1, wherein the blast chamber has a lateral width at a position where the path is laid, shorter than a length of the lead frame. 3. The blast chamber has a plurality of partition plates suspended near the discharge section and near a carry-in port and a carry-out port of the transfer means, and an air curtain formed outside the plurality of partition plates. 3. The deburring device for a resin mold part according to claim 1, further comprising an air nozzle for injecting air to be blown. 4. The path includes a sliding contact portion where the lower surface of the resin mold portion slides and a non-sliding contact portion where a plurality of holes through which the abrasive material flows are formed and the resin mold portion does not slide. The deburring device for a resin mold part according to claim 1, wherein the deburring device has a rail. 5. The transport means includes a transport rail on which the lead frame is mounted, and a transport pin that can be fitted into a transport hole of the lead frame, and the lead is reciprocated and vertically moved by the transport pin. 2. The deburring device for a resin mold part according to claim 1, further comprising a transport pin mechanism for moving the frame forward. 6. The deburring apparatus according to claim 1, wherein the negative pressure forming means is a dust collector coupled to the abrasive material storage section.