Plastic package body screening mechanism

Abstract

A plastic package body screening mechanism comprises a supporting plate, a screening assembly and a pushing assembly. The two supporting plates are parallel to each other, and a conveying belt which intermittently moves in the length direction of the supporting plates is arranged above the supporting plates and used for conveying triodes. The screening assembly comprises an installation block which is arranged on the outer side of one supporting plate and moves in the width direction and the vertical direction of the supporting plate, the installation block rotates around the axis of the installation block, the axis is parallel to the length direction of the supporting plate, a plurality of detachable rotating plates are arranged on the circumferential side of the installation block in the circumferential direction, and grooves matched with triode pins are formed in the rotating plates. The pins are used for penetrating through the triodes; the pushing assembly comprises a pushing plate which is arranged above the conveying belt, moves in the width direction of the conveying belt and is used for pushing away the triodes. The conveying belt comprises a plurality of supporting blocks which are sequentially and rotationally connected, and the top face of each supporting block is provided with a U-shaped part with an opening facing the other supporting plate and used for limiting the peripheral side of the triode. The device can automatically detect and screen the shapes of the pins of the plastic package body, and improves the production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor processing technology, and in particular to a plastic encapsulation screening mechanism. Background Technology

[0002] In the semiconductor chip manufacturing process, the chip is typically fixed to a lead frame and encapsulated in plastic. The leads are then cut to form individual encapsulated units, with leads protruding from one or both sides. During transport and other processes, the leads are prone to bending and deformation under external forces, rendering the encapsulated units unusable in electronic devices. Therefore, encapsulated units with defective leads need to be screened out and corrected. Products that still fail after correction are scrapped. In existing technologies, encapsulated units such as transistors are typically placed in batches in a testing mold. Encapsulated units that do not match the mold shape are visually inspected and rejected. However, due to the small size of the encapsulated units, visual inspection is prone to errors, leading to a lower product yield. Furthermore, the transfer of encapsulated units is done manually, which is detrimental to production efficiency. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned prior art, this application provides a molding compound screening mechanism that can automatically detect and screen the pin shape of molding compounds, improve production efficiency, and has strong practicality.

[0004] To achieve the above objectives, the present invention employs the following technology:

[0005] A plastic encapsulation screening mechanism includes: a support plate, a screening component, and a pushing component.

[0006] There are two support plates, which are parallel to each other. A conveyor belt that moves intermittently along the length of the support plates is provided above them for conveying the encapsulated body. The screening component includes a mounting block located outside one of the support plates and moving along its width and vertical directions. The mounting block rotates around its own axis, which is parallel to the length of the support plate. Multiple detachably connected rotating plates are provided around the periphery of the mounting block along the circumferential direction. The rotating plates have grooves that match the pins of the encapsulated body for the pins of the encapsulated body to pass through. The pushing component includes a pusher plate located above the conveyor belt and moving along its width direction for pushing away the encapsulated body.

[0007] Furthermore, the conveyor belt includes multiple support blocks that are rotatably connected in sequence. The top surface of each support block is provided with a U-shaped portion, the opening of which faces another support plate, for limiting the periphery of the plastic seal.

[0008] Furthermore, the mounting block is mounted on the rotating shaft, and both ends of the rotating shaft are rotatably mounted on the lifting block, with one end connected to the output end of the power equipment. The power equipment is mounted on one of the lifting blocks, and the bottom surface of the lifting block is provided with a first screw. The first screw passes through the moving plate and is locked with a nut. The moving plate is moved along the width direction of the conveyor belt.

[0009] Furthermore, one of the support plates has two horizontal plates on its outer side, and the horizontal plates have guide grooves along their length. The side of the movable plate has two connecting blocks, which are slidably fitted in the guide grooves and sleeved on the second screw and locked with nuts. The second screw is installed on the horizontal plate.

[0010] Furthermore, the upper end of the push plate is connected to the moving end of the horizontal linear mechanism, which is mounted on the limiting plate. The limiting plate and the screening component are located on both sides of the conveyor belt, respectively, for limiting the end of the plastic seal. The limiting plate is moved along the width direction of the conveyor belt and has through holes on its side for passing through unqualified plastic seals.

[0011] Furthermore, a third screw is provided on the outer side of the limiting plate. The third screw passes through the bracket and is locked with a nut. The bracket is installed on another support plate.

[0012] The advantages of this invention are as follows: during the conveying process of the encapsulated body, the rotating plate can be used to detect the pin shape of the encapsulated body, thereby improving the detection speed of the encapsulated body; and the push plate can automatically push away encapsulated bodies with unqualified pins, thereby achieving rapid screening of the encapsulated body; moreover, the limiting plate can be moved and the rotating plate can be detached to adapt to encapsulated bodies of different sizes, which can also improve the versatility of the screening mechanism. Attached Figure Description

[0013] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of this invention.

[0014] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of this application.

[0015] Figure 2 This is a three-dimensional schematic diagram of the screening component in an embodiment of this application.

[0016] Figure 3 This is a three-dimensional schematic diagram of the push component in an embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0018] like Figures 1-3 As shown, this example provides a plastic encapsulation screening mechanism, including: a support plate 100, a screening component 200, and a pushing component 300.

[0019] There are two support plates 100, which are parallel to each other. A conveyor belt that moves intermittently along the length of the support plate 100 is provided above the support plate 100 for conveying the encapsulated body. The screening component 200 includes a mounting block 201 located outside one of the support plates 100 and movable along its width and vertical directions. The mounting block 201 rotates around its own axis, which is parallel to the length of the support plate 100. Multiple detachably connected rotating plates 202 are provided around the periphery of the mounting block 201 along the circumferential direction. The rotating plates 202 are provided with grooves 203 that match the pins of the encapsulated body for the pins of the encapsulated body to pass through. The pushing component 300 includes a pusher plate 301 located above the conveyor belt and movable along its width direction for pushing away encapsulated bodies with unqualified pins.

[0020] Specifically, the conveyor belt includes multiple support blocks 101 connected in sequence for rotation, and the encapsulated body is placed on the support blocks 101. The top surface of the support block 101 is provided with a U-shaped part 102, the opening of the U-shaped part 102 facing another support plate 100, which is used to limit the periphery of the encapsulated body. The pin orientation of the encapsulated body is opposite to the opening orientation of the U-shaped part 102. For encapsulated bodies of different widths, a locking block can be added inside the U-shaped part 102 and fixed to ensure the limiting of the two sides of the encapsulated body.

[0021] Specifically, mounting block 201 is mounted on rotating shaft 204, both ends of rotating shaft 204 are rotatably mounted on lifting blocks 205, and one end is connected to the output end of power equipment. Power equipment is mounted on one of the lifting blocks 205. The bottom surface of lifting block 205 is provided with a first screw 206, which passes through the moving plate 207 and is locked with a nut. Moving plate 207 is moved along the width direction of the conveyor belt. When inspecting the shape of the molded body pins, the power equipment drives rotating shaft 204 to rotate, which in turn drives mounting block 201 to rotate, thereby causing the rotating plate 202 to rotate. The groove 203 passes through the pins of the encapsulated body. For encapsulated bodies with deformed pins, the groove 203 will interfere with the encapsulated body, causing the rotation of the mounting block 201 to be blocked. At this time, the unqualified encapsulated body with pins can be pushed away by the push plate 301. Then the mounting block 201 can continue to rotate to inspect the pins of subsequent encapsulated bodies. When facing encapsulated bodies of different sizes, the position of their pins will also change. By rotating the nut and moving the moving plate 207 along the width direction of the conveyor belt, the position of the rotating plate 202 can be adjusted to adapt to encapsulated bodies of different sizes.

[0022] Specifically, one of the support plates 100 has two horizontal plates 103 on its outer side. The horizontal plates 103 have guide grooves 104 along their length. The moving plate 207 has two connecting blocks 208 on its side. The connecting blocks 208 are slidably fitted in the guide grooves 104 and sleeved on the second screw 105 and locked with nuts. The second screw 105 is installed on the horizontal plate 103. When it is necessary to move the moving plate 207 along the width of the conveyor belt, it is only necessary to loosen the nuts to move the moving plate 207, and then lock it with nuts again.

[0023] Specifically, the upper end of the push plate 301 is connected to the moving end of the horizontal linear mechanism, which is mounted on the limiting plate 302. The limiting plate 302 and the screening component 200 are located on both sides of the conveyor belt, respectively, for limiting the end of the plastic encapsulation body. The limiting plate 302 is moved along the width direction of the conveyor belt and has a through hole 303 on its side for passing through unqualified plastic encapsulation bodies. When it is necessary to push away plastic encapsulation bodies with unqualified pins, the horizontal linear mechanism drives the push plate 301 to move towards the limiting plate 302, thereby pushing the plastic encapsulation body and passing through the through hole 303. After the plastic encapsulation body passes through the through hole 303, it will deflect and fall under its own gravity, and at the same time, the push plate 301 resets.

[0024] Specifically, a third screw 304 is provided on the outer side of the limiting plate 302. The third screw 304 passes through the bracket 305 and is locked with a nut. The bracket 305 is installed on another support plate 100. The limiting plate 302 can be moved by rotating the nut. Then the third screw 304 can be locked again with the nut to achieve the limiting of the ends of plastic seals of different sizes.

[0025] Since the above are merely preferred embodiments of this utility model and are not intended to limit this utility model, it is obvious that those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A plastic encapsulation screening mechanism, characterized in that, The utility model relates to a kind of plastic package screening device, including: Supporting plate (100), two, and mutually parallel, the supporting plate (100) is equipped with conveying belt intermittently moving along its length direction, for conveying plastic package; Screening assembly (200), including installation block (201) being located at the outside of one of the supporting plate (100) and being movably arranged along its width direction and vertical direction, the installation block (201) rotates around its axis, and axis is parallel to the length direction of the supporting plate (100), the installation block (201) is equipped with a plurality of detachable connection rotating plate (202) along the circumferential direction of its circumference, the rotating plate (202) is equipped with groove (203) matched with the pin of plastic package, for passing through the pin of plastic package; Pushing assembly (300), including push plate (301) being located at the conveying belt and being movably arranged along its width direction, for pushing away plastic package.

2. The plastic package screening mechanism according to claim 1, wherein The conveying belt includes a plurality of support blocks (101) connected in sequence, the top surface of the support block (101) is provided with a U-shaped part (102), the opening of the U-shaped part (102) faces the other supporting plate (100), for limiting the circumference of the plastic package.

3. The plastic package screening mechanism according to claim 1, wherein The installation block (201) is installed on the rotating shaft (204), the rotating shaft (204) is rotatably installed on the lifting block (205) at both ends, and one end is connected to the output end of the power equipment, the power equipment is installed on one of the lifting block (205), the bottom surface of the lifting block (205) is provided with a first screw (206), the first screw (206) is arranged in the moving plate (207) and locked by a nut, the moving plate (207) is movably arranged along the width direction of the conveying belt.

4. The plastic package screening mechanism according to claim 3, wherein One side of the supporting plate (100) is provided with two cross plates (103), the cross plates (103) are provided with guide grooves (104) along the length direction, the side surface of the moving plate (207) is provided with two connecting blocks (208), the connecting blocks (208) are slidingly fitted in the guide grooves (104) and are sleeved on the second screw (105), and are locked by a nut, the second screw (105) is installed on the cross plate (103).

5. The plastic package screening mechanism according to claim 1, wherein The upper end of the push plate (301) is connected to the moving end of the horizontal linear mechanism, the horizontal linear mechanism is installed on the limiting plate (302), the limiting plate (302) and the screening assembly (200) are located on both sides of the conveying belt respectively, for limiting the end of the plastic package, the limiting plate (302) is movably arranged along the width direction of the conveying belt, and the side surface is provided with a through hole (303), for passing through unqualified plastic package.

6. The plastic package screening mechanism according to claim 5, wherein The limiting plate (302) is provided with a third screw (304) outside, the third screw (304) is arranged in the bracket (305) and locked by a nut, and the bracket (305) is installed on the other supporting plate (100).

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