Plastic package mold lead frame with sealing structure

Abstract

The utility model discloses a plastic package mould lead frame with a sealing structure, which comprises a lead main body, the bottom of the lead main body is connected with a lead pin, and the front part of the lead main body is provided with a positioning hole in a penetrating manner; according to the plastic package mold lead frame with the sealing structure, the elastic sheet can be extruded and positioned with the positioning groove when resetting, the sealing plate can be driven to be positioned when the elastic sheet is positioned, and the notch at the top of the terminal pin can be sealed when the sealing plate is positioned, so that black glue can be prevented from overflowing from the notch during processing; when the push block slides, the sealing gasket can be driven to move to the notch to be extruded, and when the sealing gasket is extruded, the sealing gasket can deform so as to be better attached to the notch in shape, so that the sealing effect of the plastic package mold lead frame is further improved, and the fixing block can slide through the fixing groove when moving; and when the fixing blocks slide out of the fixing grooves, the terminal pins can be detached, and the terminal pins can be replaced with new terminal pins after being detached, so that the efficiency of detaching and replacing the damaged lead frame is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic packaging molds, in particular to a plastic packaging mold lead frame with a sealing structure. Background Art

[0002] Plastic molds are tools used to make plastic seals or packages, usually made of metal or hard plastic. They apply pressure on heated plastic sheets or films to form the desired shape. The plastic mold lead frame is a key step in the design and manufacture of plastic molds. It is a detailed drawing of the mold design, including size, shape, component layout and possible movement mechanisms. The lead frame not only helps designers and engineers accurately understand and implement design intent, but also ensures precision and efficiency during the manufacturing process.

[0003] In the prior art, a Chinese patent with the authorization announcement number CN218647930U discloses a plastic-encapsulated lead frame with a split heat sink, which belongs to the field of plastic-encapsulated molds. Its technical key points include a lead frame and a pin line arranged on the front of the lead frame, two connection grooves are provided on the front of the pin line, a plug block is fixed inside the connection groove, a spring is clamped inside the connection groove, a through hole is provided on the spring, and a heat sink is fixed between the fronts of the two springs. The plastic-encapsulated lead frame with a split heat sink improves the positioning stability of the lead frame and the pin line through the first positioning hole and the second positioning hole, and at the same time, under the action of the positioning column, the position can be accurately found for plastic encapsulation, and the heat sink and the pin line can be easily positioned, and the heat conductive sheet can also be easily positioned inside the substrate, so that the convenience can be effectively improved, and under the filling of thermal conductive silicone grease, the stability of the connection between the heat sink and the heat conductive sheet can be improved.

[0004] At present, most of the plastic encapsulation mold lead frames on the market still have certain deficiencies when in use. As shown in the above-mentioned document, the device improves the heat dissipation effect of the frame through heat conductive sheets and thermal grease, thereby improving stability. However, there will be a gap between the lead frame and the mold during the processing process, and the gap is prone to overflowing with black glue, which is very difficult to clean. Secondly, the lead pins are easily damaged. If the overall replacement cost is high, it will be troublesome to use. Utility Model Content

[0005] The utility model aims to provide a plastic encapsulation mold lead frame with a sealing structure to solve the problems in the above background technology that the lead frame has poor sealing effect, is prone to glue overflow, and needs to be replaced as a whole after the lead pins are damaged, which results in high cost.

[0006] To achieve the above object, the utility model provides the following technical solution: a plastic encapsulation mold lead frame with a sealing structure, comprising a lead body, a lead pin is connected to the bottom of the lead body, and a positioning hole is opened through the front of the lead body;

[0007] A connecting block is symmetrically fixed to the front of the lead body, a sliding groove is provided inside the connecting block, two groups of positioning grooves are provided on the side of the sliding groove, a sliding block slides through the inside of the sliding groove, a blocking plate is fixed between the sliding blocks, an elastic sheet is fixed on the side of the sliding block, and a blocking mechanism for sealing the mold gap is provided at the front of the lead body;

[0008] A fixing block is fixed on the top of the lead pin, and a splitting mechanism for separating the lead pin from the lead body is provided on the top of the lead pin.

[0009] Furthermore, the sliding block and the blocking plate are an integrated structure, the elastic sheet and the positioning groove form a snap-fit ​​structure, and an extrusion mechanism is provided inside the blocking plate to improve the blocking effect of the overflow port.

[0010] Furthermore, the extrusion mechanism includes a movable groove, and the movable groove is arranged on the back of the blocking plate, and a threaded rod is threadedly connected to the inside of the movable groove.

[0011] Furthermore, the end of the threaded rod is connected to a push block via a bearing, the side of the push block is connected to a sealing gasket, and the sealing gasket penetrates and slides inside the movable groove.

[0012] Furthermore, the splitting mechanism includes a compression pad, and the compression pad is connected to both sides of the top of the lead pin, and a fixing groove is opened at the bottom of the lead body.

[0013] Furthermore, a telescopic slot is penetrated through the side of the fixed slot, a clamping block is slidably disposed inside the telescopic slot, a push rod is fixed to the side of the clamping block, and the push rod penetrates and slides inside the telescopic slot.

[0014] Furthermore, a spring is connected between the engaging block and the telescopic slot, and an engaging slot is provided on a side surface of the fixing block.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The plastic encapsulation mold lead frame with a sealing structure can be squeezed and positioned with the positioning groove when the elastic sheet is reset, and the sealing plate can be driven to be positioned when the elastic sheet is positioned, and the gap on the top of the lead pin can be blocked when the sealing plate is positioned, so as to prevent the black glue from overflowing through the gap during processing, and the sealing gasket can be driven to move to the gap for squeezing when the push block slides, and the sealing gasket can be deformed when squeezed so as to better fit the shape of the gap, thereby further improving the sealing effect of the plastic encapsulation mold lead frame, and the fixed block can slide through the fixed groove when it moves, and the lead pin can be disassembled when the fixed block slides out of the fixed groove, and the lead pin can be replaced with a new one after being disassembled, thereby improving the efficiency of disassembly and replacement of the lead frame after damage.

[0017] 2. A positioning groove and an elastic sheet are provided. The position of the elastic sheet can be positioned through the two positioning grooves so that the elastic sheet will not move at will. At the same time, the elastic sheet can be directly moved by extrusion deformation, which simplifies the operation process and is easy to use;

[0018] 3. A threaded rod is provided, and the threaded sliding between the threaded rod and the sealing plate can drive the sealing gasket to squeeze the gap of the plastic sealing mold to prevent the black glue from overflowing. The threaded movement mode has a greater torque force and is relatively stable when moving;

[0019] 4. A sealing gasket is provided, which can be deformed when the notch of the plastic sealing mold is squeezed. The sealing gasket can adapt to notches of different shapes through deformation, thereby achieving a better sealing effect, reducing the limitation of the sealing, and being widely and simply used;

[0020] 5. A compression pad is provided, through which the lead pin can be compressed and deformed when it contacts the lead body, and the compression pad can reduce the gap generated when the lead body and the lead pin are connected, thereby improving the stability of the lead pin and the lead body when connected;

[0021] 6. A snap-fit ​​block and a snap-fit ​​slot are provided, and the snap-fit ​​block and the snap-fit ​​slot can be separated by squeezing the telescopic slot. The operation is simple and quick, which improves the efficiency of lead pin replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall front-view three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the overall rear-view stereoscopic structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the split cross-sectional three-dimensional structure of the connection block of the utility model;

[0025] Figure 4 This is a schematic diagram of the cutaway three-dimensional structure of the plugging plate of the utility model;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the lead body of the utility model when it is split and cut away;

[0027] Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the lead body of the utility model.

[0028] In the figure: 1. lead body; 2. lead pin; 3. positioning hole; 101. connecting block; 102. sliding groove; 103. positioning groove; 104. sliding block; 105. blocking plate; 106. elastic sheet; 107. movable groove; 108. threaded rod; 109. push block; 110. sealing gasket; 201. fixed block; 202. extrusion pad; 203. fixed groove; 204. telescopic groove; 205. engaging block; 206. push rod; 207. spring; 208. engaging groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment 1:

[0031] like Figure 1-Figure 3 The technical solution shown in the figure, the present invention provides the following technical solution: In order to solve the problem that the lead frame of the plastic encapsulation mold has a gap, the gap is not blocked and glue overflows easily during product production, which affects product quality, is troublesome to handle, and reduces processing efficiency, a blocking mechanism is disclosed:

[0032] The lead body 1 includes a lead pin 2 connected to the bottom, a positioning hole 3 is formed through the front of the lead body 1, a connecting block 101 is symmetrically fixed to the front of the lead body 1, a sliding groove 102 is formed inside the connecting block 101, two groups of positioning grooves 103 are formed on the side of the sliding groove 102, a sliding block 104 slides through the inside of the sliding groove 102, a sealing plate 105 is fixed between the sliding blocks 104, an elastic sheet 106 is fixed on the side of the sliding block 104, a sealing mechanism for sealing the mold gap is provided at the front of the lead body 1, a fixing block 201 is fixed on the top of the lead pin 2, and a splitting mechanism for separating the lead pin 2 from the lead body 1 is provided on the top.

[0033] The sliding block 104 and the blocking plate 105 are an integrated structure, and the elastic sheet 106 and the positioning groove 103 form a snap-fit ​​structure. The blocking plate 105 is provided with an extrusion mechanism to improve the blocking effect of the overflow port. After the lead body 1 is placed in the specified position of the plastic packaging mold, the blocking plate 105 is pushed to drive the sliding block 104 to move. When the sliding block 104 moves, it can drive the elastic sheet 106 to tilt and squeeze the inclined surface of the positioning groove 103. When the elastic sheet 106 is squeezed, it can be deformed by its own material. When the elastic sheet 106 is deformed, it can squeeze out the positioning groove 103. Inside the groove 103, the sliding block 104 can slide through the sliding groove 102. When the sealing plate 105 slides to the top of the lead pin 2, the elastic sheet 106 can slide to the side of another set of positioning grooves 103. At this time, the elastic sheet 106 can be reset by the material. When the elastic sheet 106 is reset, it can be squeezed and positioned with the positioning groove 103. When the elastic sheet 106 is positioned, it can drive the sealing plate 105 to be positioned. When the sealing plate 105 is positioned, it can block the gap at the top of the lead pin 2 to prevent the black glue from overflowing through the gap during processing.

[0034] Embodiment 2:

[0035] like Figure 2 and Figure 4 The technical solution shown in the figure, the present invention provides the following technical solution: In order to solve the problem that black glue will seep out from irregular gaps during plugging, it is necessary to further improve the plugging effect of the plugging mechanism, on the basis of the first embodiment, an extrusion mechanism is disclosed:

[0036] The extrusion mechanism includes a movable groove 107, and the movable groove 107 is opened on the back of the sealing plate 105. A threaded rod 108 is threadedly connected inside the movable groove 107. The end of the threaded rod 108 is connected to a push block 109 through a bearing. A sealing gasket 110 is connected to the side of the push block 109. The sealing gasket 110 slides through the movable groove 107. When the gap of the plastic encapsulation mold needs to be sealed, the threaded rod 108 is rotated to slide through the sealing plate 105. When the threaded rod 108 slides, the bearing can be driven to rotate and move when the threaded rod 108 slides. When the bearing rotates, the threaded rod 108 and the push block 109 can be driven to rotate. When the bearing moves, the push block 109 can be pushed to move. When the push block 109 moves, it can slide through the movable groove 107. When the push block 109 slides, it can drive the sealing gasket 110 to move to the gap for extrusion. When the sealing gasket 110 is extruded, it can be deformed so as to better fit the shape of the gap, thereby further improving the sealing effect of the lead frame of the plastic encapsulation mold.

[0037] Embodiment three:

[0038] like Figure 1 , Figure 2 , Figure 5 and Figure 6The technical solution shown in the figure, the present invention provides the following technical solution: In order to solve the problem that the lead pin 2 of the lead frame of the plastic packaging mold cannot be used after being damaged and needs to be replaced as a whole, thereby increasing the production cost and causing waste of materials, a splitting mechanism is disclosed:

[0039] The splitting mechanism includes a pressing pad 202, and the pressing pad 202 is connected to both sides of the top of the lead pin 2, a fixing groove 203 is provided at the bottom of the lead body 1, and a telescopic groove 204 is provided on the side of the fixing groove 203, and a clamping block 205 is slidable inside the telescopic groove 204, and a push rod 206 is fixed on the side of the clamping block 205, and the push rod 206 penetrates and slides inside the telescopic groove 204, a spring 207 is connected between the clamping block 205 and the telescopic groove 204, and a clamping groove 208 is provided on the side of the fixing block 201. When the lead pin 2 needs to be replaced, pushing the push rod 206 can drive the clamping block 205 to move. When the locking block 205 moves, it can slide through the telescopic slot 204 and the locking slot 208. When the locking block 205 slides, the spring 207 can be squeezed. When the spring 207 is squeezed, it can deform. When the locking block 205 is squeezed out of the locking slot 208, the lead pin 2 is pulled. When the lead pin 2 is pulled, the fixed block 201 can be driven to move. When the fixed block 201 moves, it can slide through the fixed slot 203. When the fixed block 201 slides out of the fixed slot 203, the lead pin 2 can be disassembled. After the lead pin 2 is disassembled, it can be replaced with a new one, which improves the efficiency of disassembling and replacing the lead frame after it is damaged.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic encapsulation mold lead frame with a sealing structure, comprising a lead body (1), a lead pin (2) connected to the bottom of the lead body (1), a positioning hole (3) penetrating the front of the lead body (1), characterized in that ； A connecting block (101) is symmetrically fixed at the front of the lead body (1), a sliding groove (102) is provided inside the connecting block (101), two groups of positioning grooves (103) are provided on the side of the sliding groove (102), a sliding block (104) slides through the inside of the sliding groove (102), a sealing plate (105) is fixed between the sliding blocks (104), an elastic sheet (106) is fixed on the side of the sliding block (104), and a sealing mechanism for sealing the mold gap is provided at the front of the lead body (1); A fixing block (201) is fixed on the top of the lead pin (2), and a splitting mechanism for separating the lead pin (2) from the lead body (1) is provided on the top of the lead pin (2).

2. The plastic encapsulation mold lead frame with a sealing structure according to claim 1, characterized in that: The sliding block (104) and the blocking plate (105) are an integrated structure, the elastic sheet (106) and the positioning groove (103) form a snap-fit ​​structure, and a squeezing mechanism for improving the blocking effect of the overflow port is arranged inside the blocking plate (105).

3. The plastic encapsulation mold lead frame with a sealing structure according to claim 2, characterized in that: The extrusion mechanism comprises a movable groove (107), and the movable groove (107) is arranged on the back of the blocking plate (105), and a threaded rod (108) is threadedly connected to the inside of the movable groove (107).

4. The plastic encapsulation mold lead frame with a sealing structure according to claim 3, characterized in that: The end of the threaded rod (108) is connected to a push block (109) via a bearing, and the side of the push block (109) is connected to a sealing gasket (110), and the sealing gasket (110) penetrates and slides inside the movable groove (107).

5. The plastic encapsulation mold lead frame with a sealing structure according to claim 1, characterized in that: The splitting mechanism comprises a pressing pad (202), and the pressing pad (202) is connected to both sides of the top of the lead pin (2), and a fixing groove (203) is provided at the bottom of the lead body (1).

6. The plastic encapsulation mold lead frame with a sealing structure according to claim 5, characterized in that: A telescopic groove (204) is provided through the side of the fixed groove (203), a locking block (205) is slidably provided inside the telescopic groove (204), a push rod (206) is fixed on the side of the locking block (205), and the push rod (206) penetrates and slides inside the telescopic groove (204).

7. The plastic encapsulation mold lead frame with a sealing structure according to claim 6, characterized in that: A spring (207) is connected between the locking block (205) and the telescopic slot (204), and a locking slot (208) is provided on the side of the fixing block (201).

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