A manual cutting mold for post-molding defective products

Abstract

The application relates to a manual cutting mold for post-molding defective products, and relates to the technical field of semiconductors. In order to solve the problem that defective products are not removed in time, the mold base is provided with an upper cutter mold group, four sides of the upper cutter mold group are provided with mold guide columns for guiding the up-down movement of the upper cutter mold group, four mold guide columns are vertically fixed on the mold base, the bottom of the upper cutter mold group is provided with a plurality of upper cutters for cutting, a film pressing mechanism for pressing a film is arranged above the upper cutter mold group, a lower cutter cutting opening corresponding to the upper cutter is formed in the bottom of the mold base, a frame tray is further arranged on the mold base, the frame tray is divided into two sections, the two sections of the frame tray are arranged on the two sides of the upper cutter mold group along a feeding direction, and the arrangement position of the frame tray avoids the lower cutter cutting opening. The application has the effect of improving the efficiency of processing post-molding defective products.

Description

Technical Field

[0001] This application relates to the field of semiconductor technology, and in particular to a mold for manually cutting defective products after plastic sealing. Background Technology

[0002] In semiconductor packaging manufacturing, the molding process is one of the key steps to ensure chip reliability and stability. During this stage, the chip is encapsulated in a protective plastic casing to prevent damage from the external environment. However, in the frame preparation stage before molding, defective chips may appear on the frames due to various reasons (such as material defects, processing errors, etc.).

[0003] In related technologies, although defective products on the frame are marked before molding, an important technical problem still exists in the actual semiconductor packaging production process: how to effectively remove defective products from the frame during the molding process. If these defective products are not removed in time, they will be mixed into good products in subsequent processes, resulting in defective products in the final product, which seriously affects product quality and production efficiency. Therefore, this issue needs to be improved. Utility Model Content

[0004] To address the issue of untimely rejection of defective products, this application provides a manual mold for cutting defective products after plastic sealing.

[0005] This application provides a manual cutting mold for defective products after plastic sealing, employing the following technical solution:

[0006] A manual mold for cutting defective products after plastic sealing includes a mold base, on which an upper cutting die assembly is mounted. Each of the four sides of the upper cutting die assembly has mold guide pillars for guiding its vertical movement. All four mold guide pillars are vertically fixed to the mold base. The bottom of the upper cutting die assembly has several upper cutting blades for cutting. Above the upper cutting die assembly is a film-pressing mechanism for pressing film. The bottom of the mold base has a lower cutting opening corresponding to the upper cutting blades. The mold base also has a frame tray, which is divided into two sections. These two sections are arranged along the feeding direction on both sides of the upper cutting die assembly, and the arrangement of the frame trays avoids the lower cutting opening.

[0007] By adopting the above technical solution, including a mold base, a frame tray installed on the mold base, an upper blade module installed on the mold base through mold guide pillars, and the upper blade module using the mold guide pillars to achieve up and down movement, an upper blade installed at the bottom of the upper blade module, and the upper blade module equipped with a film pressing mechanism for film pressing operation, and a lower cutting opening opened at the bottom of the mold base;

[0008] When processing defective products after plastic sealing, the operator manually places the defective products to be cut on the frame tray on the mold base. When placing the products, attention should be paid to their positional relationship with the upper cutting module and the lower cutting edge, so that the column with defective products is in the lower cutting position. The film pressing mechanism is started, and the film pressing mechanism moves downward, driving the upper cutting module to move downward along the mold guide post. The upper cutting edge at the bottom of the upper cutting module moves downward and cooperates with the lower cutting edge at the bottom of the mold base to cut the defective parts. After cutting, the upper cutting module is raised and reset, so that the upper cutting edge leaves the cutting part. Finally, the cut products are carefully removed from the frame tray. After a batch of defective products is stamped, the cut-off defective products are cleaned up.

[0009] With the mold base, frame tray, upper cutting module and pressing mechanism, defective products can be removed in time. After the defective products are manually placed in the appropriate position, the cutting, resetting and material picking operations can be easily completed. It is also easy to clean up the cut defective products. While ensuring the cutting accuracy and quality, it improves the efficiency of processing defective products after plastic sealing. The operation is convenient and the structure is reasonable.

[0010] Optionally, the film pressing mechanism includes two support plates, a rotating shaft, an eccentric wheel, and a film pressing rod. The two support plates are fixed on the mold base, the upper cutting die assembly is arranged between the two support plates, the rotating shaft is located above the upper cutting die assembly and its two ends are rotatably connected to the two support plates, the eccentric wheel is sleeved on the rotating shaft and contacts the top of the upper cutting die assembly, and the film pressing rod is fixed to one end of the rotating shaft.

[0011] By adopting the above technical solution, the film pressing mechanism includes two support plates, a rotating shaft, an eccentric wheel, and a film pressing rod. When it is necessary to press down the upper die assembly for cutting, the operator manually presses down the film pressing rod, and the rotating shaft will rotate accordingly, driving the eccentric wheel sleeved on it to rotate together. The eccentric wheel will apply downward pressure to the top of the upper die assembly. Under the downward pressure of the eccentric wheel, the upper die assembly moves downward along the four mold guide pillars that are vertically fixed to the mold base until the upper cutter at its bottom engages with the lower cutter cutting opening at the bottom of the mold base to cut the defective parts.

[0012] The design of the pressing mechanism simplifies the operation process and makes the cutting action easier to control. The mechanical advantage of the eccentric wheel provides stable and uniform downward pressure, effectively ensuring the accuracy and stability of the cutting process. At the same time, the overall structure is compact and reliable in operation, which greatly improves the efficiency and quality of manual cutting operations.

[0013] Optionally, two sets of spring columns are symmetrically arranged on the mold base, and the two sets of spring columns are respectively arranged on both sides of the upper die assembly to drive the upper die assembly to reset and rise.

[0014] By adopting the above technical solution, the upper die assembly is reset and raised through the spring column. The setting of the spring column simplifies the reset operation process. With the uniform elastic force of the spring column, it is ensured that the upper die assembly can return to the accurate position, which effectively ensures the stability of the mold in subsequent use and the continuity of cutting operations, and greatly improves the ease of operation of the mold for manually cutting defective products after plastic sealing.

[0015] Optionally, the size of any of the upper cutting tools can be adapted to the size of the defective product after plastic sealing at the cutting position.

[0016] By adopting the above technical solution, the size of the upper cutter is adapted to the size of the defective product after plastic sealing at the cutting position; by setting the size of the upper cutter, the upper cutter can perfectly fit the defective part, which will not cause unnecessary damage to other intact parts of the product due to excessive size, and can ensure that the defective part is cut off thoroughly and accurately, minimizing waste residue and significantly improving cutting accuracy and quality.

[0017] Optionally, the upper blade module is provided with an upper blade fixing seat, and the plurality of upper blades are all mounted on the upper blade fixing seat.

[0018] By adopting the above technical solution, the upper cutter is mounted on the upper cutter module through the upper cutter fixing seat; through the setting of the upper cutter fixing seat, the stability and consistency of the upper cutter during the cutting process are effectively guaranteed by the upper cutter fixing seat's precise and stable support, which greatly improves the cutting accuracy and quality, optimizes the overall structural layout of the mold, and enhances the reliability of the mold.

[0019] Optionally, the upper blade fixing seat is provided with a plurality of upper blade pressing support columns for supporting the cutting force. Each upper blade pressing support column corresponds to an upper blade. The upper blade fixing seat is provided with a plurality of strip grooves. The upper blade pressing support columns are slidably installed in the corresponding strip grooves. The bottom of any upper blade pressing support column contacts the top of the corresponding upper blade.

[0020] By adopting the above technical solution, a strip groove is formed through the upper blade fixing seat, and the upper blade pressing support column is slidably installed in the strip groove. The bottom of each upper blade pressing support column contacts the top of the corresponding upper blade. At the same time, the upper blade pressing support column that is not involved in cutting can slide along the strip groove to an idle position, ensuring that the remaining upper blades will not be pressed during cutting. Through the setting of the strip groove and the upper blade pressing support column, the cutting force is precisely supported and distributed, ensuring that the upper blade involved in cutting receives a stable and uniform downward pressure, effectively improving the cutting accuracy and quality. Furthermore, the sliding flexibility of the upper blade pressing support column allows the mold to quickly adjust the support state according to different cutting requirements, optimizing the cutting process and enhancing the adaptability of the mold.

[0021] Optionally, the mold base is provided with a positioning groove for positioning the circuit product after molding, and the size of the positioning groove matches the circuit product.

[0022] By adopting the above technical solution, the positioning groove is opened on the mold base; the setting of the positioning groove effectively reduces the cutting error caused by the position offset of the product during the cutting process, greatly improves the cutting accuracy and quality, and also reduces the time and effort of manual repeated adjustment of the product position by the stable constraint of the positioning groove, thus improving the operating efficiency.

[0023] Optionally, the bottom of the mold base is provided with a collection drawer, which is located directly below the cutting edge and is used to collect defective products after cutting.

[0024] By adopting the above technical solution, the collection drawer is installed at the bottom of the mold base and is located directly below the cutting edge. The collection drawer enables automatic collection of defective products, effectively reducing the number of defective products scattered in the work area, maintaining a clean and orderly operating environment, reducing the time and workload of manual waste cleaning, and facilitating the subsequent unified processing of defective products by operators.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. With the mold base, frame tray, upper blade module and pressing mechanism, defective products can be manually placed in the appropriate position to easily complete cutting, resetting and material picking operations. It is also easy to clean up the cut defective products. While ensuring cutting accuracy and quality, it improves the efficiency of processing defective products after plastic sealing. It is easy to operate and has a reasonable structure.

[0027] 2. The setting of the pressing mechanism simplifies the operation process and makes the cutting action easier to control. With the mechanical advantage of the eccentric wheel, it provides stable and uniform downward pressure, effectively ensuring the accuracy and stability of the cutting process. At the same time, the overall structure is compact and the operation is reliable, which greatly improves the efficiency and quality of manual cutting operations.

[0028] 3. The spring column simplifies the reset operation process. With the uniform elastic force of the spring column, the upper die assembly can be reset to the accurate position, which effectively ensures the stability of the mold in subsequent use and the continuity of cutting operations, and greatly improves the ease of operation of the mold for manually cutting defective products after plastic sealing. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a mold for manually cutting defective products after plastic sealing, as described in an embodiment of this application.

[0030] Figure 2This is a schematic diagram illustrating the structure of the cutting edge and the collection drawer in the embodiments of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Mold base; 2. Upper blade module; 3. Mold guide pillar; 4. Upper blade; 5. Pressing mechanism; 51. Support plate; 52. Rotating shaft; 53. Eccentric wheel; 54. Pressing rod; 6. Lower blade cutting slot; 7. Frame tray; 8. Spring pillar; 9. Upper blade fixing seat; 91. Strip groove; 10. Upper blade pressing support pillar; 11. Positioning groove; 12. Collection drawer. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0033] This application discloses a mold for manually cutting defective products after plastic sealing. (Refer to...) Figure 1 and Figure 2 The mold for manually cutting defective products after plastic sealing includes a mold base 1, an upper cutting die 2 is installed on the mold base 1, and mold guide pillars 3 are installed on all four sides of the upper cutting die 2. The mold guide pillars 3 are vertically installed on the mold base 1. In this embodiment, the four mold guide pillars 3 stand at the four corners of the upper cutting die 2 and are equipped with ball bearing bushings for the up and down movement of the upper cutting die 2.

[0034] Reference Figure 1 and Figure 2 The bottom of the upper blade module 2 is provided with several upper blades 4 for cutting. In this embodiment, the upper blade module 2 is equipped with an upper blade fixing seat 9, and the upper blades 4 are all installed on the upper blade fixing seat 9. With the precise and stable support of the upper blades 4 by the upper blade fixing seat 9, the stability and consistency of the upper blades 4 during the cutting process are effectively guaranteed, the cutting accuracy and quality are greatly improved, the overall structural layout of the mold is optimized, and the reliability of the mold is enhanced.

[0035] Reference Figure 1 and Figure 2 The size of the upper cutter 4 is adapted to the size of the defective product after plastic sealing at the cutting position. The upper cutter 4 can perfectly fit the defective part, so that it will not cause unnecessary damage to other intact parts of the product due to excessive size, and can ensure that the defective part is cut off thoroughly and accurately, minimizing waste residue and significantly improving cutting accuracy and quality.

[0036] Reference Figure 1 and Figure 2Meanwhile, several strip-shaped grooves 91 are provided through the upper blade fixing seat 9. Each strip-shaped groove 91 is slidably installed with an upper blade pressing support column 10. The number of upper blade pressing support columns 10 is the same as the number of upper blades 4, and the upper blade pressing support columns 10 correspond one-to-one with the upper blades 4. The bottom of any upper blade pressing support column 10 contacts the top of the corresponding upper blade 4. In this embodiment, the upper blade pressing support columns 10 that are not involved in cutting can slide along the strip-shaped grooves 91 to an idle position, ensuring that the remaining upper blades will not press and cut during cutting. This achieves precise support and distribution of cutting force, ensuring that the upper blades 4 involved in cutting receive stable and uniform downward pressure, effectively improving cutting accuracy and quality. Furthermore, the sliding flexibility of the upper blade pressing support columns 10 allows the mold to quickly adjust the support state according to different cutting requirements, optimizing the cutting process and enhancing the adaptability of the mold.

[0037] Reference Figure 1 A film pressing mechanism 5 is installed above the upper cutting module 2. In this embodiment, the film pressing mechanism 5 includes two support plates 51, a rotating shaft 52, an eccentric wheel 53, and a film pressing rod 54. The two support plates 51 are fixedly installed on the mold base 1 at intervals. The upper cutting module 2 is located between the two support plates 51, and the rotating shaft 52 is located above the upper cutting module 2. The two ends of the rotating shaft 52 are rotatably connected to the two support plates 51 through bearings. The eccentric wheel 53 is sleeved on the rotating shaft 52 and contacts the top of the upper cutting module 2. The film pressing rod 54 is fixedly connected to one end of the rotating shaft 52 and is arranged perpendicular to the rotating shaft 52. This simplifies the operation process and makes the cutting action easier to control. The mechanical advantage of the eccentric wheel 53 provides a stable and uniform downward pressure, effectively ensuring the accuracy and stability of the cutting process. At the same time, the overall structure is compact and the operation is reliable, which greatly improves the efficiency and quality of manual cutting operations.

[0038] Reference Figure 1 and Figure 2 Two sets of spring pillars 8 are also installed on the mold base 1. The two sets of spring pillars 8 are symmetrically installed on both sides of the upper die assembly 2. In this embodiment, the spring pillars 8 and the upper die assembly 2 are connected by indirect elastic contact. Through the elastic restoring force of the spring pillars 8 and the guiding structure on the mold base 1, it can be ensured that the upper die assembly 2 can return to the accurate position every time it is reset. The reset operation process is simplified. With the uniform elastic force of the spring pillars 8, it is ensured that the upper die assembly 2 can return to the accurate position after reset, which effectively ensures the stability of the mold in subsequent use and the continuity of the cutting operation, and greatly improves the ease of operation of the mold for manually cutting defective products after plastic sealing.

[0039] Reference Figure 1 and Figure 2The bottom of the mold base 1 is provided with a lower cutting opening 6, which corresponds to the upper cutting tool 4. In this embodiment, there can be multiple lower cutting openings 6. At the same time, the mold base 1 is provided with a positioning groove 11 for positioning the circuit product after molding. The size of the positioning groove 11 matches the circuit product. This effectively reduces the cutting error caused by the position offset of the product during the cutting process, greatly improves the cutting accuracy and quality, and also reduces the time and effort of manually adjusting the product position by relying on the stable constraint of the positioning groove 11, thus improving the operation efficiency.

[0040] Reference Figure 1 and Figure 2 A collection drawer 12 is slidably installed at the bottom of the mold base 1. The collection drawer 12 is located directly below the cutting opening 6 and is used to collect defective products after cutting. This realizes the automatic collection of defective products, effectively reduces the number of defective products scattered in the work area, keeps the operating environment clean and orderly, reduces the time and workload of manual waste cleaning, and facilitates the subsequent unified processing of defective products by operators.

[0041] Reference Figure 1 and Figure 2 The mold base 1 is also equipped with a frame tray 7. In this embodiment, the frame tray 7 is divided into two sections. The two sections of the frame tray 7 are arranged on both sides of the upper blade module 2 along the feeding direction, and the arrangement of the frame tray 7 avoids the lower blade cutting opening 6.

[0042] The implementation principle of a manual mold for cutting defective products after plastic sealing in this application embodiment is as follows: When processing products with defects after plastic sealing, the operator manually places the defective products to be cut on the frame tray 7 on the mold base 1. When placing the products, attention should be paid to their positional relationship with the upper blade module 2 and the lower blade cutting opening 6, so that the column with defective products is placed in the lower blade position. At the same time, the upper blade pressing support column 10 of the position to be cut is moved to the upper blade 4 position, and all others are moved to the idle position to ensure that during cutting, the remaining lower blades will not be punched and cut, and the plastic seal of the previous column of products is completely moved into the positioning groove 11. In the middle, after the cutting and positioning are completed, the film pressing mechanism 5 is started. The film pressing mechanism 5 moves downward, driving the upper blade module 2 to move downward along the mold guide post 3. The upper blade 4 at the bottom of the upper blade module 2 moves downward and cooperates with the lower blade cutting port 6 at the bottom of the mold base 1 to cut the defective part. After the cutting is completed, the film pressing mechanism 5 is released, and the upper blade module 2 rises and resets under the action of the spring column 8, so that the upper blade 4 leaves the cutting part. Finally, the cut product is carefully taken out from the frame tray 7. After a batch of defective products is stamped, the defective product collection drawer 12 is opened to clean up the cut defective products.

[0043] With the mold base 1, frame tray 7, upper blade module 2 and pressing mechanism, defective products can be manually placed in the appropriate position to easily complete cutting, resetting and material removal operations. It is also convenient to clean up the cut defective products. While ensuring cutting accuracy and quality, it improves the efficiency of processing defective products after plastic sealing. The operation is convenient and the structure is reasonable.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A manual mold for cutting defective products after plastic sealing, characterized in that: The device includes a mold base, on which an upper cutting die assembly is mounted. Each of the four sides of the upper cutting die assembly has mold guide pillars to guide its vertical movement. All four mold guide pillars are vertically fixed to the mold base. The bottom of the upper cutting die assembly has several upper cutting blades for cutting. Above the upper cutting die assembly is a film pressing mechanism for pressing a film. The bottom of the mold base has a lower cutting opening corresponding to the upper cutting blades. The mold base also has a frame tray, which is divided into two sections. These two sections are arranged along the feeding direction on both sides of the upper cutting die assembly, and their placement avoids the lower cutting opening.

2. The mold for manually cutting defective products after plastic sealing according to claim 1, characterized in that: The film pressing mechanism includes two support plates, a rotating shaft, an eccentric wheel, and a film pressing rod. The two support plates are fixed on the mold base. The upper cutting module is arranged between the two support plates. The rotating shaft is located above the upper cutting module and its two ends are rotatably connected to the two support plates. The eccentric wheel is sleeved on the rotating shaft and contacts the top of the upper cutting module. The film pressing rod is fixed to one end of the rotating shaft.

3. The mold for manually cutting defective products after plastic sealing according to claim 1, characterized in that: Two sets of spring columns are symmetrically arranged on the mold base. The two sets of spring columns are respectively arranged on both sides of the upper cutter mold assembly and are used to drive the upper cutter mold assembly to reset and rise.

4. A mold for manually cutting defective products after plastic sealing according to claim 1, characterized in that: The size of any of the cutting tools described herein is adapted to the size of the defective product after plastic sealing at the cutting position.

5. A mold for manually cutting defective products after plastic sealing according to claim 1, characterized in that: The upper blade module is provided with an upper blade fixing seat, and the plurality of upper blades are all mounted on the upper blade fixing seat.

6. A mold for manually cutting defective products after plastic sealing according to claim 5, characterized in that: The upper blade fixing seat is provided with a number of upper blade pressing support columns for supporting the cutting force. Each upper blade pressing support column corresponds to an upper blade. The upper blade fixing seat is provided with a number of strip-shaped grooves. The upper blade pressing support columns are slidably installed in the corresponding strip-shaped grooves. The bottom of any upper blade pressing support column is in contact with the top of the corresponding upper blade.

7. A mold for manually cutting defective products after plastic sealing according to claim 1, characterized in that: The mold base is provided with a positioning groove for positioning the circuit product after molding, and the size of the positioning groove matches the circuit product.

8. A mold for manually cutting defective products after plastic sealing according to claim 1, characterized in that: The bottom of the mold base is equipped with a collection drawer, which is located directly below the cutting edge and is used to collect defective products after cutting.

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