Semi-automatic MGP packaging mold box with core pulling function

Abstract

The utility model discloses a semi-automatic MGP packaging mould box with a core-pulling function, which comprises an upper mould and a lower mould, an upper mould seat is positioned and arranged at the top of the upper mould, an upper core-pulling plate is arranged in the upper mould, an upper core-pulling needle fixing plate is arranged on the upper core-pulling plate, an upper core-pulling needle is arranged on the upper core-pulling needle fixing plate, and a lower core-pulling needle is arranged on the lower core-pulling needle fixing plate. An upper oil cylinder is installed at the position, connected with the upper core-pulling plate, in the upper mold, a lower mold base is installed at the bottom of the lower mold, a lower core-pulling plate is arranged in the lower mold, a lower core-pulling needle fixing plate is installed on the lower core-pulling plate, and a lower core-pulling needle is installed on the lower core-pulling needle fixing plate. According to the semi-automatic MGP packaging mould box with the core-pulling function, when a product is not cooled and formed in the core-pulling structure, needle-pulling treatment is carried out, so that the condition of copper leakage is avoided. And the needle drawing structure is used for avoiding a dispensing procedure when production is carried out, so that the working efficiency is improved, and defective products during dispensing can also be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor manufacturing, in particular to a semi-automatic MGP packaging mold box with a core-pulling function. Background Art

[0002] MGP packaging mold box is a supporting equipment for semiconductor manufacturing. At present, domestic semiconductor manufacturing is slowly entering a mature stage. The rapid emergence of ultra-high-speed computers, digital audio and video, mobile communications, portable electronic machines, smart home appliances and new energy sources has directly driven the advancement of chip electronic packaging technology. With the continuous development of science and technology, people's requirements for the manufacturing process of MGP packaging mold box are also getting higher and higher.

[0003] Existing MGP packaging molds have certain drawbacks. As society fully enters the AI era, the manufacturing industry is becoming increasingly advanced, yet semiconductor circuit packaging technology remains unsatisfactory. Products with built-in heat sinks still require post-assembly dispensing with glue to provide insulation and address copper leakage. This additional step in production reduces efficiency, and automatic glue dispensers are also very expensive. When producing products such as the TO-220FP, production efficiency is reduced, and the cost of automatic glue dispensers is also a significant expense. Therefore, we propose a semi-automatic MGP packaging mold with a core-pulling function. Utility Model Content

[0004] Technical Problem Solved: To address the shortcomings of the existing technology, the present invention provides a semi-automatic MGP packaging mold box with a core-pulling function. In the core-pulling structure, the needle is pulled out before the product is cooled and formed, thus preventing copper leakage. The needle-pulling structure eliminates the glue dispensing process during production, improving work efficiency and preventing defective products from being produced during glue dispensing, effectively resolving the problems of the prior art.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a semi-automatic MGP packaging mold box with a core pulling function, comprising an upper mold and a lower mold, the top of the upper mold is positioned and installed with an upper mold base, the interior of the upper mold is provided with an upper core pulling plate, the upper core pulling needle fixing plate is installed on the upper core pulling plate, the upper core pulling needle fixing plate is installed with an upper oil cylinder at the position where the upper mold is connected to the upper core pulling plate, the bottom of the lower mold is installed with a lower mold base, the interior of the lower mold is provided with a lower core pulling plate, the lower core pulling needle fixing plate is installed on the lower core pulling plate, the lower core pulling needle fixing plate is installed on the lower core pulling needle fixing plate, the lower oil cylinder is installed at the position where the lower mold is connected to the lower core pulling plate, and a lead is provided between the lower core pulling needle and the upper core pulling needle.

[0006] Preferably, a left limit sealing mechanism and a right limit sealing mechanism are respectively installed on both sides of the upper end of the lower mold, and the left limit sealing mechanism and the right limit sealing mechanism both include a limiter, a sealing rubber plate, a sealing ring gasket, a screw and a bolt, the bolt and the screw are located at the bottom of the limiter, the sealing ring gasket is located in the inner middle part of the limiter, and the sealing rubber plate is located on the inner surface of the limiter.

[0007] Preferably, the top of the upper mold is fixed by an upper mold base, and the upper mold base is connected to a downward pressure cylinder, and the downward pressure cylinder drives the upper mold base to move up and down, and the bottom of the lower mold is fixed by a lower mold base.

[0008] Preferably, the lower core pulling needle fixing plate is fixed to the lower core pulling plate, the lower core pulling needle is fixed to the lower core pulling needle fixing plate, and the lower oil cylinder drives the lower core pulling plate and drives the lower core pulling needle fixing plate and the lower core pulling needle to move.

[0009] Preferably, the upper core pulling plate is fixed to the upper core pulling needle fixing plate, and the upper core pulling needle fixing plate is fixed to the upper core pulling needle. The upper oil cylinder drives the upper core pulling plate and drives the upper core pulling needle fixing plate and the upper core pulling needle to move.

[0010] Preferably, the limiter is fixed by bolts and screws, and the inner side of the limiter is sealed and positioned by a sealing rubber plate and a sealing ring gasket.

[0011] Beneficial effects: Compared with the existing technology, the present invention provides a semi-automatic MGP packaging mold box with a core-pulling function, which has the following beneficial effects: In the semi-automatic MGP packaging mold box with a core-pulling function, when the product is not cooled and formed, the needle is pulled out, so there will be no copper leakage. The needle-pulling structure eliminates the glue dispensing process during production, improves work efficiency, and can also solve the problem of defective products during glue dispensing;

[0012] During the packaging process, the heat sink-embedded product is packaged in a level, ensuring the level of the material. Once the epoxy resin is cured, the material can be extracted using the core pull pins embedded in the upper and lower mold plates. This completes the product packaging. This structure eliminates the need for secondary glue dispensing, and prevents incomplete glue dispensing from causing damage and resulting in scrapping. The MGP packaging mold box is simple in structure, easy to operate, and offers superior performance compared to traditional methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a semi-automatic MGP packaging mold box with a core-pulling function in the utility model.

[0014] Figure 2This is a structural schematic diagram of the state before core pulling in the enlarged view of point A in a semi-automatic MGP packaging mold box with a core pulling function of the present invention.

[0015] Figure 3 This is a structural schematic diagram of the semi-automatic MGP packaging mold box with a core-pulling function in the utility model in the enlarged view of point A after core-pulling.

[0016] Figure 4 This is a structural schematic diagram of a limiting sealing mechanism in a semi-automatic MGP packaging mold box with a core-pulling function in the utility model.

[0017] In the figure: 1. Upper mold; 2. Upper core-pulling needle fixing plate; 3. Upper oil cylinder; 4. Upper core-pulling plate; 5. Upper mold base; 6. Right limit sealing mechanism; 7. Lower mold base; 8. Lower core-pulling needle fixing plate; 9. Lower oil cylinder; 10. Lower core-pulling plate; 11. Lower mold; 12. Lower core-pulling needle; 13. Left limit sealing mechanism; 14. Upper core-pulling needle; 15. Lead wire; 16. Limiter; 17. Sealing rubber plate; 18. Sealing ring gasket; 19. Screw; 20. Bolt. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1-4 As shown, a semi-automatic MGP packaging mold box with a core pulling function includes an upper mold 1 and a lower mold 11. The upper mold base 5 is positioned and installed on the top of the upper mold 1. The upper core pulling plate 4 is provided inside the upper mold 1. The upper core pulling needle fixing plate 2 is installed on the upper core pulling needle fixing plate 2. The upper core pulling needle 14 is installed on the upper core pulling needle fixing plate 2. The upper oil cylinder 3 is installed at the position where the upper mold 1 is connected to the upper core pulling plate 4. The bottom of the lower mold 11 is installed with a lower mold base 7. The lower mold 11 is provided with a lower core pulling plate 10. The lower core pulling needle fixing plate 8 is installed on the lower core pulling needle fixing plate 8. The lower core pulling needle 12 is installed on the lower core pulling needle fixing plate 8. The lower mold 11 is provided with a lower oil cylinder 9 at the position where the lower mold 11 is connected to the lower core pulling plate 10. A lead 15 is provided between the lower core pulling needle 12 and the upper core pulling needle 14. In the core pulling structure, if the needle is pulled out when the product is not cooled and formed, copper leakage will not occur. The needle extraction structure eliminates the need for dispensing during production, which improves work efficiency and also solves the problem of defective products during dispensing.

[0022] Furthermore, a left limiting sealing mechanism 13 and a right limiting sealing mechanism 6 are respectively installed on both sides of the upper end of the lower mold 11. The left limiting sealing mechanism 13 and the right limiting sealing mechanism 6 both include a limiter 16, a sealing rubber plate 17, a sealing ring gasket 18, a screw 19 and a bolt 20. The bolt 20 and the screw 19 are located at the bottom of the limiter 16, the sealing ring gasket 18 is located in the inner middle part of the limiter 16, and the sealing rubber plate 17 is located on the inner surface of the limiter 16.

[0023] Furthermore, the top of the upper mold 1 is fixed by the upper mold base 5, and the upper mold base 5 is connected to the downward pressure cylinder, which drives the upper mold base 5 to move up and down, and the bottom of the lower mold 11 is fixed by the lower mold base 7.

[0024] Furthermore, the lower core pulling needle fixing plate 8 is fixed to the lower core pulling plate 10, and the lower core pulling needle 12 is fixed to the lower core pulling needle fixing plate 8. The lower oil cylinder 9 drives the lower core pulling plate 10 and drives the lower core pulling needle fixing plate 8 and the lower core pulling needle 12 to move.

[0025] Furthermore, the upper core pulling plate 4 is fixed to the upper core pulling needle fixing plate 2, and the upper core pulling needle fixing plate 2 is fixed to the upper core pulling needle 14. The upper oil cylinder 3 drives the upper core pulling plate 4 and drives the upper core pulling needle fixing plate 2 and the upper core pulling needle 14 to move.

[0026] Furthermore, the limiter 16 is fixed by means of a bolt 20 and a screw rod 19 , and the inner side of the limiter 16 is sealed and positioned by means of a sealing rubber plate 17 and a sealing ring gasket 18 .

[0027] The core pulling plate moves up and down through the drive of the oil cylinder, and the core pulling pin is fixed to the core pulling plate through the core pulling pin fixing plate. After the oil cylinder drives the core pulling plate, the core pulling pin moves up and down. After the product is formed by the forming insert, the force of the oil cylinder pushes or pulls down the core pulling plate, so that the unformed product can complete the whole process of core pulling through the floating of the core pulling plate.

[0028] Working principle: The utility model includes an upper mold 1, an upper core-pulling needle fixing plate 2, an upper oil cylinder 3, an upper core-pulling plate 4, an upper mold base 5, a right limit sealing mechanism 6, a lower mold base 7, a lower core-pulling needle fixing plate 8, a lower oil cylinder 9, a lower core-pulling plate 10, a lower mold 11, a lower core-pulling needle 12, a left limit sealing mechanism 13, an upper core-pulling needle 14, a lead 15, a limiter 16, a sealing rubber plate 17, a sealing ring gasket 18, a screw 19, and a bolt 20. In the core-pulling structure, when the product is not cooled and formed, the needle is pulled out to avoid copper leakage. The needle-pulling structure eliminates the need for dispensing glue during production, thereby improving work efficiency and also solving the problem of defective products appearing during dispensing glue and puncturing the product when it is put into use.

[0029] The MGP mold box with core pulling function includes the following components in addition to the conventional MGP mold box: mold box bottom plate, ejector plate, ejector fixing plate, mold box and molding insert assembly (including: center block, mold nest insert, tooth insert);

[0030] A core pulling plate is added to the original mold box, and a core pulling pin fixing strip is embedded in the core pulling plate, so that the core pulling pin is fixed in the core pulling plate. In the production process, the oil pressure of the oil cylinder is used to keep the core pulling plate in a state before injection molding (see attached). Figure 2 ) The core-pulling pins on the upper and lower mold boxes press the blank tightly to ensure that the blank does not tilt and maintains the flatness of the blank during packaging. If this step is omitted, the blank cannot be kept level during packaging, and the packaged product will be scrapped.

[0031] During injection molding, when the epoxy glue has not yet solidified, use the force of the oil cylinder to pull the upper and lower core plates to reset and maintain the state 2 (attached Figure 3 ). In this state, wait for the product to solidify and then open the mold to completely encapsulate the product. At this time, there will be no copper leakage in the upper and lower molds, and the product can directly proceed to the subsequent cutting and forming processes.

[0032] Compared to traditional plastic encapsulation molds, when the heat sink is built in, support pins are required to hold the blank horizontally. Without the support of a core-pulling structure, an additional row of pins must be added during packaging. After packaging, copper leaks will occur where the pins are removed. In this case, a glue dispenser is required for secondary insulation of the product. Incomplete glue dispensing can also cause breakdown during power-on inspection, rendering the product scrapped.

[0033] This MGP encapsulation mold box with a core-pulling function ensures the levelness of the heat sink-embedded product during the encapsulation process, based on the processing of state one and state two. When the epoxy resin is cured, the core-pulling pins embedded in the upper and lower mold plates can be used to extract the core, thus completing the product encapsulation. This encapsulated product does not require secondary glue dispensing, nor does it cause damage and scrapping due to incomplete glue dispensing.

[0034] When the core pulling plate drives the core pulling pin, due to the huge number of products in each mold, the pin may get stuck during the pulling process. This is a technical difficulty. In order to keep the pulling action consistent, the following technical requirements are made:

[0035] (1) Ensure the flatness of the core pulling plate, and ensure the flatness of the core pulling plate is within 0.003mm;

[0036] (2) Ensure the verticality of the core pulling needle, and ensure the verticality of the core pulling needle is within 0.005mm;

[0037] Under the guarantee of machining accuracy, the technical problem of the core pulling needle stuck during the pulling process can be guaranteed to a large extent; however, when the problem of the needle stuck is guaranteed by machining accuracy, the machining process is often unsatisfactory, and the machining error is often not perfected to the μ level. On this basis, in order to continue to ensure the technical problem of the needle stuck during the pulling process. The design of adding needle sleeves to the upper and lower mold forming inserts greatly reduces the occurrence of needle stuck problems during production. Figure 2 As shown, a core pulling pin sleeve is incorporated into the mold insert, creating a sliding fit between the sleeve and the core pulling pin. This reduces the tolerances between the core pulling plate and the core pulling pin during production, thereby increasing the life of the core pulling pin. The tolerances between the core pulling pin and the sleeve are perfectly matched, and the core pulling pin's reciprocating movement within the sleeve prevents the pin from becoming stuck and shortening its lifespan. This reduces costs and mitigates the technical issue of the pin becoming stuck during the extraction process.

[0038] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the presence of other identical elements in the process, method, article or device that includes the elements.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A semi-automatic MGP packaging mold box with a core-pulling function, comprising an upper mold (1) and a lower mold (11), characterized in that: The top of the upper mold (1) is positioned and installed with an upper mold base (5), the interior of the upper mold (1) is provided with an upper core pulling plate (4), the upper core pulling needle fixing plate (2) is installed on the upper core pulling plate (4), the upper core pulling needle fixing plate (2) is installed on the upper core pulling needle fixing plate (2), the upper oil cylinder (3) is installed at the position connected to the upper core pulling plate (4) inside the upper mold (1), the bottom of the lower mold (11) is installed with a lower mold base (7), the interior of the lower mold (11) is provided with a lower core pulling plate (10), the lower core pulling needle fixing plate (8) is installed on the lower core pulling needle fixing plate (8), the lower core pulling needle (12) is installed on the lower core pulling needle fixing plate (8), the interior of the lower mold (11) is provided with a lower oil cylinder (9) at the position connected to the lower core pulling plate (10), and a lead wire (15) is provided between the lower core pulling needle (12) and the upper core pulling needle (14).

2. The semi-automatic MGP packaging mold box with a core-pulling function according to claim 1, characterized in that: A left limiting sealing mechanism (13) and a right limiting sealing mechanism (6) are respectively installed on both sides of the upper end of the lower mold (11), and the left limiting sealing mechanism (13) and the right limiting sealing mechanism (6) both include a limiter (16), a sealing rubber plate (17), a sealing ring gasket (18), a screw (19) and a bolt (20), wherein the bolt (20) and the screw (19) are located at the bottom of the limiter (16), the sealing ring gasket (18) is located in the middle of the inner side of the limiter (16), and the sealing rubber plate (17) is located on the inner surface of the limiter (16).

3. The semi-automatic MGP packaging mold box with a core-pulling function according to claim 1, characterized in that: The top of the upper mold (1) is fixed by an upper mold base (5), and the upper mold base (5) is connected to a downward pressure cylinder, and the downward pressure cylinder drives the upper mold base (5) to move up and down, and the bottom of the lower mold (11) is fixed by a lower mold base (7).

4. The semi-automatic MGP packaging mold box with a core-pulling function according to claim 1, characterized in that: The lower core pulling needle fixing plate (8) is fixed to the lower core pulling plate (10), and the lower core pulling needle (12) is fixed to the lower core pulling needle fixing plate (8). The lower oil cylinder (9) drives the lower core pulling plate (10) and drives the lower core pulling needle fixing plate (8) and the lower core pulling needle (12) to move.

5. The semi-automatic MGP packaging mold box with a core-pulling function according to claim 1, characterized in that: The upper core pulling plate (4) is fixed to the upper core pulling needle fixing plate (2), and the upper core pulling needle fixing plate (2) is fixed to the upper core pulling needle (14). The upper oil cylinder (3) drives the upper core pulling plate (4) and drives the upper core pulling needle fixing plate (2) and the upper core pulling needle (14) to move.

6. The semi-automatic MGP packaging mold box with a core-pulling function according to claim 2, characterized in that: The stopper (16) is fixed by a bolt (20) and a screw rod (19), and the inner side of the stopper (16) is sealed and positioned by a sealing rubber plate (17) and a sealing ring gasket (18).

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