Plastic packaging mold and plastic packaging equipment

Abstract

The utility model discloses a plastic package mold and plastic package equipment. The plastic package mold comprises a mold base, and two barrier strips which are parallel to each other are fixedly arranged on two opposite sides of the mold base; stop blocks are respectively arranged at two ends of the barrier strip; a closed ring is defined by the baffle strip and the baffle block; two cavity strips are arranged in the closed ring, and a center strip is arranged between the two cavity strips; the cavity strips and the central strips are parallel to the barrier strips; the total width of the two cavity strips and the central strip is smaller than the width of the distance between the two barrier strips; the distance between the two stop blocks is the same as the length of the cavity strip and the center strip; limiting structures are arranged on the check blocks and / or the check strips and used for limiting the cavity strips to move in the width direction of the cavity strips. At least one of the stop block and the stop strip is provided with the limiting structure used for limiting the cavity strip to deviate in the width direction of the cavity strip, the packaging precision of the plastic packaging mold is guaranteed, and the packaging quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor preparation, in particular to a plastic packaging mold and plastic packaging equipment. Background Art

[0002] Semiconductor plastic encapsulation is a packaging process that covers chips or devices with molded plastic for protection; through plastic encapsulation, the chips, devices and connecting lines that were originally exposed to the outside world are protected by the external plastic encapsulation body to avoid the invasion of the external environment (especially the humid environment) on the semiconductor devices and avoid product failure. Plastic encapsulation technology is widely used in the currently well-known semiconductor packaging forms, such as TSSOP, DFN, OFN, SIP, BCA, IGA, FSCSP, WICSP, etc.

[0003] The key equipment in the plastic encapsulation process is the plastic encapsulation mold. After the plastic encapsulation material is placed in the plastic encapsulation mold, it is preheated, stamped, and other operations are performed on the plastic encapsulation material to eventually form the plastic encapsulation material into a specific shape structure.

[0004] The main structure of the plastic encapsulation mold includes an upper body and a lower body that are pressed together. The mold base of the lower body is provided with a cavity bar and other structures; the cavity bar has various slot patterns that determine the final molding shape of the plastic encapsulation material. In the plastic encapsulation process of different semiconductor devices, the types of cavity bars required are different, which determines that the cavity bar needs to be a detachable splicing setting on the mold base, which inevitably makes the structural fixation stability of the cavity bar insufficient, affecting the molding accuracy of the plastic encapsulation material. Utility Model Content

[0005] The utility model aims to provide a plastic packaging mold and a plastic packaging device, which can improve the plastic packaging accuracy of semiconductor devices to a certain extent and ensure the plastic packaging effect.

[0006] In order to solve the above technical problems, the utility model provides a plastic packaging mold, including a mold base, on which two mutually parallel blocking strips are fixedly arranged on opposite sides of the mold base; two ends of the blocking strips are respectively provided with blocking blocks; a closed ring is formed between the blocking strips and the blocking blocks;

[0007] Two cavity bars are arranged in the closed ring, and a center bar is arranged between the two cavity bars; the cavity bar and the center bar are parallel to the baffle bar;

[0008] The total width of the two cavity bars and the center bar is smaller than the spacing width between the two stop bars; the spacing length between the two stop blocks is the same as the length of the cavity bars and the center bar;

[0009] The stop block and / or the stop bar are provided with a limiting structure for limiting the movement of the cavity bar in the width direction of the cavity bar.

[0010] In an optional embodiment of the present application, when the limiting structure is arranged on the stop block, the limiting structure includes a protrusion on the surface of one side of the cavity bar that is attached to the stop block; and the end of the cavity bar is provided with a groove that matches the protrusion.

[0011] In an optional embodiment of the present application, at least two protrusions are provided on the stopper along the length direction, and one of the protrusions can be inserted into a groove on the cavity bar.

[0012] In an optional embodiment of the present application, the protrusion is a trapezoidal protrusion with a gradually decreasing width extending outward from the surface of the stopper; and the groove is a trapezoidal groove that matches the shape of the protrusion.

[0013] In an optional embodiment of the present application, when the limiting structure is arranged on the baffle bar, the limiting structure includes a curved spherical protrusion arranged on the surface of the cavity bar at one end of the baffle bar, wherein the thickness of the vertex position of the curved spherical protrusion is equal to the difference between the spacing width between the two baffle bars and the total width of the two cavity bars and the center bar.

[0014] In an optional embodiment of the present application, when the limiting structure is arranged on the baffle, the limiting structure comprises a screw hole penetrating the width of the baffle, and a top screw arranged in the screw hole;

[0015] When the top screw is screwed into the screw hole, the top end of the top screw extends from one end of the screw hole close to the cavity bar and extends to abut against the cavity bar;

[0016] When the top screw is screwed out of the screw hole, the top end of the top screw retracts into the inside of the screw hole.

[0017] In an optional embodiment of the present application, a plurality of screw holes are sequentially arranged along the length direction of the baffle bar, and the top screw is arranged in each screw hole.

[0018] In an optional embodiment of the present application, a disc is also provided at the top end of the top screw.

[0019] In an optional embodiment of the present application, the total length of the top screw is not greater than the length of the screw hole.

[0020] A plastic packaging device comprises the plastic packaging mold as described in any one of the above items.

[0021] The utility model provides a plastic encapsulation mold and a plastic encapsulation device, which comprises a mold base, on which two mutually parallel baffles are fixedly arranged on opposite sides of the mold base; baffles are respectively arranged at both ends of the baffles; a closed ring is formed between the baffles and the baffles; two cavity bars are arranged in the closed ring, and a center bar is arranged between the two cavity bars; the cavity bar and the center bar are parallel to the baffles; the total width of the two cavity bars and the center bar is less than the spacing width between the two baffles; the spacing length between the two baffles is the same as the length of the cavity bar and the center bar; a limiting structure is arranged on the baffles and / or the baffles to limit the movement of the cavity bar in the width direction of the cavity bar.

[0022] The block and the baffle in the plastic encapsulation mold of the present application are annular structures that surround and accommodate the cavity strip and the center strip; however, in conventional plastic encapsulation molds, in order to facilitate the installation of the cavity strip and the center strip, only the two ends of the block and the cavity strip are often tightly fitted, while there is a certain gap between the two baffles and the side edges of the cavity strip, so that the cavity strip may be offset in its width direction, and this offset may affect the plastic encapsulation processing accuracy during the actual plastic encapsulation process; for this reason, in the present application, at least one of the block and the baffle is provided with a limiting structure to limit the displacement of the cavity strip along its width direction, thereby ensuring the packaging accuracy of the plastic encapsulation mold and the packaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a mold base in a conventional plastic packaging mold;

[0025] Figure 2 A schematic diagram of the structure for cleaning the plastic encapsulation mold provided in this application;

[0026] Figure 3 A schematic diagram of the structure of the plastic encapsulation mold provided in an embodiment of the present application;

[0027] Figure 4 Another structural schematic diagram of the plastic encapsulation mold provided in an embodiment of the present application;

[0028] Figure 5 Another structural schematic diagram of the plastic encapsulation mold provided in the embodiment of the present application;

[0029] In the accompanying drawings: 100 is a mold cleaning rubber strip, 101 is an upper body, 102 is a lower body, 1 is a mold base, 2 is a stopper, 21 is a protrusion, 3 is a stopper, 31 is a curved spherical protrusion, 32 is a screw hole, 33 is a top screw, and 331 is a disc. DETAILED DESCRIPTION

[0030] like Figure 1 As shown, Figure 1 The schematic diagram of the structure of the mold base in a conventional plastic packaging mold is shown in FIG. A rectangular frame structure is formed between two mutually parallel baffles 3 and two mutually parallel baffles 2 at the edge of the upper surface of the mold base 1, and two cavity bars 5 are symmetrically arranged about the center bar 4 in the rectangular frame structure, and the length directions of the two cavity bars 5 and the center bar 4 are parallel to the length direction of the baffle 3; in the actual installation of two cavity bars 5 and one center bar 4, the two baffles 3 and one baffle 2 are fixed on the mold base 1, and the ends of the center bar are fixedly connected to the baffles, and then the two cavity bars 5 are inserted into the positions between the two sides of the center bar 4 and the two baffles 3. and in order to avoid the problem that the cavity bar 5 is difficult to insert and install due to the large friction between the cavity bar 5 and the baffle bar 3 during the insertion and installation of the cavity bar 5, in general, the spacing between the center bar 4 and the baffle bar 3 is slightly larger than the width of the cavity bar 5, that is, after the cavity bar 5 is inserted into both sides of the center bar 4, there is a gap between the cavity bar 5 and the baffle bar 3; when the cavity bar 5 and the center bar 4 are installed on the mold base 1, the end of the cavity bar 3 can be fixed with the last baffle 2. At this time, the two baffles 2 can fit tightly against the end face of the cavity bar 5 to limit the movement of the cavity bar 5 along its length.

[0031] It should be noted that in the process of using a plastic encapsulation mold to encapsulate semiconductor devices, the plastic encapsulation material does not have strong ductility. Therefore, when the plastic encapsulation material is heated and pressurized for encapsulation, even if there is a gap between the cavity bar 5 and the baffle bar 3, the expansion and deformation of the plastic encapsulation material will not generate a large squeezing force on the cavity bar 5 and cause displacement. Therefore, under normal circumstances, even if there is a gap between the plastic strip 5 and the baffle bar 3, it will not affect the normal encapsulation of the semiconductor device. This is also one of the reasons why the current conventional plastic encapsulation mold retains the gap between the cavity bar 5 and the baffle bar 3. In other words, there is no structure in the current conventional plastic encapsulation mold to limit the displacement of the cavity bar in the width direction.

[0032] However, the present application further considers that after the semiconductor device is encapsulated in the encapsulation mold, residues will inevitably remain in the uneven holes and grooves of the cavity strip 5, and thus the residues in the cavity strip need to be cleaned in time. Figure 2 As shown, Figure 2The present application provides a schematic diagram of a structure for cleaning the mold of the plastic encapsulation mold. The current method for cleaning the cavity strip 5 is to place a mold cleaning rubber strip 100 with adsorption performance on the cavity strip 5, and use 50 tons of pressure between the upper body 101 and the lower body 102 to squeeze each other, so that the mold cleaning rubber strip 100 extends to fill and cover the entire cavity strip 5, and the mold cleaning rubber strip 100 has a strong adsorption effect, which can also adsorb and clean the residue in the cavity strip 5. In order to ensure that the mold cleaning rubber strip 100 can clean all parts of the cavity strip 5 more comprehensively, it is also necessary for the mold cleaning rubber strip 100 to have good ductility, which also makes the upper body 101 and the lower body 102 mutually squeeze the mold cleaning rubber strip 100 between them, because the mold cleaning rubber strip 100 extends outward and drives the cavity strip 5 to deviate along its width direction, then after the mold cleaning rubber strip 100 cleans the mold, the deviation of the cavity strip 5 will inevitably affect the subsequent plastic encapsulation processing to a certain extent.

[0033] However, because the gap between the cavity bar 5 and the baffle bar 3 is relatively small, only in the order of millimeters, it is easy to be ignored, not easily perceived by the human eye, and even more difficult to be adjusted manually; and for the plastic packaging of semiconductor devices, such an offset is indeed an intolerable error. It can be seen that the present application is based on the technical problem of insufficient plastic packaging accuracy in the process of plastic packaging of semiconductor devices. Considering that the fundamental cause of this technical problem is that there is a gap between the cavity bar and the baffle bar, and the cavity bar 5 is offset in its width direction during the mold cleaning process due to the ductility of the mold cleaning rubber strip 100. Therefore, based on this fundamental reason, the present application further provides a structure for limiting the offset of the cavity bar 5 in the plastic packaging mold, thereby ensuring the accuracy of the subsequent plastic packaging process on the basis of being able to clean the residues on the cavity bar 5.

[0034] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0035] like Figure 3 As shown, Figure 3 A schematic diagram of the structure of the plastic encapsulation mold provided in an embodiment of the present application. In a specific embodiment of the present application, the plastic encapsulation mold may include

[0036] A mold base 1, on which two mutually parallel blocking bars 3 are fixedly arranged at opposite sides; two ends of the blocking bars 3 are respectively provided with blocking blocks 2; a closed ring is formed between the blocking bars 3 and the blocking blocks 2;

[0037] Two cavity bars 5 are arranged in the closed ring, and a center bar 4 is arranged between the two cavity bars; the cavity bar and the center bar 4 are parallel to the stop bar 3;

[0038] The total width of the two cavity bars 5 and the center bar 4 is smaller than the spacing width between the two stop bars 3; the spacing length between the two stop blocks 2 is the same as the length of the cavity bars and the center bar 4;

[0039] A limiting structure is provided on the stop block 2 and / or the stop bar 3 to limit the movement of the cavity bar 5 in the width direction of the cavity bar 5 .

[0040] In this embodiment, the upper surface of the mold base 1 is generally a rectangular plane, and two long strip-shaped baffles 3 are arranged on the long edges of the rectangular plane. The two baffles 2 are also long strip-shaped structures, but their length is smaller than the baffles 3. The baffles 3 and the baffles 2 are arranged perpendicular to each other, and the ends of the two are fixedly connected. Generally, the two strip-shaped baffles 3 and the one baffle 2 are fixedly arranged on the mold base 1 and are not easily disassembled; only one of the baffles 2 can be disassembled to install the cavity bar 5 and the center bar 4.

[0041] In addition, there is a structure that can be connected to each other at the two ends of the center bar 4 and the middle position of the stop block 2; therefore, during actual installation, one end of the center bar 4 is first fixedly connected to the center position of the fixed stop block 2, and then the two cavity bars 5 are respectively inserted into the position between the center bar 4 and the two side stop bars 3. After the cavity bar 5 is inserted, the remaining stop block 2 is used to fit the cavity bar 5 and the end of the center bar 4 and fix it, so that the two ends of the cavity bar 5 are squeezed by the two stop blocks 2 and restricted between the two stop blocks 2.

[0042] On this basis, in order to further limit the displacement of the cavity strip 5 along its width direction (i.e., in the direction close to the nearest baffle strip 3), a limiting structure can be further provided on at least one structural component of the baffle block 2 and the baffle strip 3; so as to limit the movement of the cavity strip 5 along its width gap during the mold clearing process.

[0043] The implementation of the limiting structure will be described below with reference to a specific embodiment.

[0044] like Figure 3 As shown, in an optional implementation of the present embodiment, the limiting structure may be a structure arranged on the stop block 2, and the limiting structure may include a protrusion 21 on the surface of one side of the stop block 2 that fits the cavity bar 5; and the end of the cavity bar 5 is provided with a groove that matches the protrusion 21.

[0045] exist Figure 3In the embodiment shown, the protrusion 21 on the stopper 2 can be inserted into the groove on the cavity bar 5, that is, the relative positioning between the cavity bar 5 and the stopper 2 can be achieved by using the protrusion 21 and the groove. The stopper 2 is fixedly arranged on the mold base 1 together with the stopper bar 3 and other structures, that is, the fixed positioning of the cavity bar 5 is achieved to a certain extent; thus, during the mold cleaning process of the cavity bar 5, the displacement of the cavity bar 5 along its width direction can be well avoided.

[0046] In practical applications, at least two protrusions 21 may be provided on the stopper 2; when there are two protrusions 21 on the stopper 2, each protrusion 21 corresponds to a groove on the cavity bar 5. When there are multiple protrusions 21 on the stopper 2, multiple grooves may be provided at the end of each cavity bar 5 accordingly, so that multiple protrusions 21 and grooves are mutually embedded and matched between the stopper 2 and the end of each cavity bar 5.

[0047] Furthermore, in order to make it easier for the protrusion 21 on the stopper 2 to be inserted into the groove at the end of the cavity strip 5, the protrusion 21 can also be a trapezoidal protrusion with a gradually decreasing width extending outward from the surface of the stopper 2; a trapezoidal groove in which the groove and the protrusion 21 match in shape.

[0048] That is to say, in this embodiment, the top width of the protrusion 21 on the stopper 2 is small on the side away from the stopper 2, while the bottom width of the other end connected to the stopper 2 is large; accordingly, the groove on the cavity strip 5 should also be a trapezoidal groove with a wide notch and a narrow bottom.

[0049] In addition, it is understandable that, in practical applications, the protrusion 21 may be provided on only one stopper 2, and the groove may be provided on only one end of the cavity bar 5. However, this embodiment does not exclude the possibility of providing protrusions 21 on both stoppers 2 and correspondingly providing grooves on both ends of the cavity bar 5, and this is not limited in this application.

[0050] The limiting structure in this embodiment can also be set on the baffle 3; Figure 4 As shown, Figure 4 Another structural schematic diagram of the plastic encapsulation mold provided in an embodiment of the present application.

[0051] In an optional embodiment of this embodiment, the limiting structure may further include:

[0052] A curved spherical protrusion 31 is arranged on the surface of one end of the baffle bar 3 facing the cavity bar 5, wherein the thickness of the vertex position of the curved spherical protrusion 31 is equal to the difference between the spacing width between the two baffle bars 3 and the total width of the two cavity bars 5 and the center bar 4.

[0053] As described above, when the cavity strip 5 is actually installed and set, one block 2 is removed and the block 2 is used as the first block, while the other block 2 can be fixed on the mold base 1 and the block is used as the second block; then the curved spherical protrusion 31 can be specifically set on the side of the end section of the two baffles 3 close to the second block; therefore, when the cavity strip 5 is inserted from the end of the baffle 3 away from the second baffle to between the baffle 3 and the center strip 4, the curved spherical protrusion 31 will not hinder the cavity strip 5, that is, it will not affect the installation of the cavity strip 5. Only when the cavity strip 5 has been mostly inserted between the center strip 4 and the baffle 3, it is only necessary to appropriately increase the force of pushing the cavity strip 5, so that the cavity strip 5 can be completely pushed between the baffle 3 and the center strip 4, and at this time, the curved spherical protrusion 31 can well squeeze the cavity strip 5 toward the center strip 4, thereby achieving a certain degree of displacement of the cavity strip 5 along its width direction.

[0054] Of course, in practical applications, it is possible to consider setting a protrusion 21 on the first of the two stop blocks 2, setting a groove on the corresponding end of the cavity bar 5, and at the same time setting a curved spherical protrusion 31 on the side of the end of the stop bar 3 close to the second stop block, thereby achieving position fixation of the cavity bar 5 at both ends of the cavity bar 5 through two different limiting structures.

[0055] Of course, the limiting structure provided on the baffle 3 is not limited to the above-mentioned implementation method. Figure 5 As shown, Figure 5 This is another structural schematic diagram of the plastic encapsulation mold provided in an embodiment of the present application.

[0056] In another optional implementation of this embodiment, the limiting structure may further include:

[0057] A screw hole 32 that runs through the width of the barrier strip 3, and a top screw 33 that is disposed in the screw hole 32;

[0058] When the top screw 33 is screwed into the screw hole 32, the top end of the top screw 33 extends from the end of the screw hole 32 close to the cavity bar 5 and extends to abut against the cavity bar 5;

[0059] When the top screw 33 is screwed out of the screw hole 32 , the top end of the top screw 33 retracts into the inside of the screw hole 32 .

[0060] It is understandable that in Figure 5 The partial enlarged diagram in FIG. 1 is a partial cross-sectional enlarged schematic diagram of the portion where the screw hole 32 is provided on the baffle bar 3. Figure 5In the embodiment shown, a screw hole 32 may be provided on the baffle bar 3, and a top screw 33 may be provided in the screw hole 32. When the cavity bar 5 has not yet been installed, the top screw 33 may be screwed outwardly of the baffle bar 3 (i.e., the side of the two baffle bars 3 facing away from each other), so that the top of the top screw 33 is completely retracted into the screw hole 32; thus, when the cavity bar 5 is inserted between the baffle bar 3 and the center bar 4, the top screw 33 may be prevented from hindering the insertion of the cavity bar 5. When the cavity strip 5 has been inserted between the baffle strip 3 and the center strip 4, the top screw 33 can be screwed into the inner side of the baffle strip 3 (i.e., the side opposite to the two baffle strips 3) so that the top end of the top screw 33 extends from the inner surface of the baffle strip 3 until it abuts against the side of the plastic strip. This can apply a force to the cavity strip 5 to squeeze the center strip 4, thereby limiting the displacement of the cavity strip 5 away from the center strip 4, thereby ensuring the fixed positioning of the cavity strip 5 and avoiding the problem of displacement of the cavity strip 5 during mold cleaning.

[0061] In addition, in order to prevent the cavity bar 5 from rotating and deviating with the top of the top screw 33 as the fulcrum, in actual applications, multiple top screws 33 can be arranged in sequence along the length direction of the baffle bar 3, and each screw hole 32 is provided with a top screw 33; thereby, the stability and reliability of the top screw 33 in limiting the cavity bar 5 is guaranteed.

[0062] Furthermore, considering that the top end of the top screw 33 is generally more pointed, the pressure acting on the side of the cavity strip 5 is smaller. Therefore, in this embodiment, a disc 331 can be further provided on the top end of the top screw 33 to ensure that when the top screw 33 and the baffle bar 3 are against each other, surface extrusion can be applied to the baffle bar 3, thereby ensuring the stability of the force applied to the baffle bar 3.

[0063] In addition, in order to ensure that when the top end of the top screw 33 abuts against the baffle 3, the other end thereof is completely located in the screw hole 32 of the baffle 3, and when the top screw 33 is screwed out to the outside of the baffle 3, it can be completely screwed into the screw hole 32; therefore, the length of the top screw 33 should not be too large, and it should be ensured that it is not greater than the length of the screw hole 32, thereby avoiding obstruction between it and the upper body of the plastic packaging mold.

[0064] To summarize, the block and the baffle in the plastic encapsulation mold of the present application are annular structures that surround and accommodate the cavity strip and the center strip; however, in conventional plastic encapsulation molds, in order to facilitate the installation of the cavity strip and the center strip, only the two ends of the block and the cavity strip are often tightly fitted, while there is a certain gap between the two baffles and the side edges of the cavity strip, which may cause the cavity strip to be offset in its width direction. This offset may affect the plastic encapsulation processing accuracy during the actual plastic encapsulation process; for this reason, in the present application, at least one of the block and the baffle is provided with a limiting structure to limit the displacement of the cavity strip along its width direction, thereby ensuring the packaging accuracy of the plastic encapsulation mold and the packaging quality.

[0065] The present application also provides an embodiment of a molding device, which includes a molding mold as described in any one of the above items.

[0066] The plastic encapsulation mold includes an upper body and a lower body, and the lower body includes a mold base; the mold base is provided with a retaining bar and a retaining block that form an annular structure, and a cavity bar and a center bar are provided in the annular structure, and a gap is left between the cavity bar and the retaining bar; in addition, at least one of the retaining bar and the retaining block is provided with a limiting structure, and the limiting structure can limit the movement of the cavity bar along its width direction. Therefore, based on the limiting structure and the limiting effect of the retaining block on the cavity bar, it is ensured that the cavity bar can be stable and not deviated during the cleaning process of the plastic encapsulation residue on the cavity bar, that is, the subsequent semiconductor plastic encapsulation accuracy is guaranteed to a certain extent.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment that includes a series of elements are inherent to the elements. In the absence of more restrictions, the elements limited by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment that includes the elements. In addition, the above-mentioned technical solution provided in the embodiment of the present application is consistent with the corresponding technical solution in the prior art in principle, and the part is not described in detail, so as not to repeat too much.

[0068] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A plastic encapsulation mold, characterized in that: It comprises a mold base, on which two mutually parallel blocking bars are fixedly arranged at opposite sides of the mold base; two ends of the blocking bars are respectively provided with blocking blocks; a closed ring is formed between the blocking bars and the blocking blocks; Two cavity bars are arranged in the closed ring, and a center bar is arranged between the two cavity bars; the cavity bar and the center bar are parallel to the baffle bar; The total width of the two cavity bars and the center bar is smaller than the spacing width between the two stop bars; the spacing length between the two stop blocks is the same as the length of the cavity bars and the center bar; The stop block and / or the stop bar are provided with a limiting structure for limiting the movement of the cavity bar in the width direction of the cavity bar.

2. The plastic encapsulation mold according to claim 1, characterized in that: When the limiting structure is arranged on the stopper, the limiting structure comprises a protrusion on one side surface of the stopper that fits the cavity bar; and a groove matching with the protrusion is arranged at the end of the cavity bar.

3. The plastic encapsulation mold according to claim 2, characterized in that: At least two protrusions are arranged on the stopper along the length direction, and one of the protrusions can be inserted into a groove on the cavity bar.

4. The plastic encapsulation mold according to claim 2, characterized in that: The protrusion is a trapezoidal protrusion with a gradually decreasing width extending outward from the surface of the stopper; the groove is a trapezoidal groove matching the shape of the protrusion.

5. The plastic encapsulation mold according to any one of claims 1 to 4, characterized in that: When the limiting structure is arranged on the baffle bar, the limiting structure includes a curved spherical protrusion arranged on the surface of one end portion of the baffle bar facing the cavity bar, wherein the thickness of the vertex position of the curved spherical protrusion is equal to the difference between the spacing width between the two baffle bars and the total width of the two cavity bars and the center bar.

6. The plastic encapsulation mold according to claim 1, characterized in that: When the limiting structure is arranged on the blocking bar, the limiting structure comprises a screw hole penetrating the width of the blocking bar, and a top screw arranged in the screw hole; When the top screw is screwed into the screw hole, the top end of the top screw extends from one end of the screw hole close to the cavity bar and extends to abut against the cavity bar; When the top screw is screwed out of the screw hole, the top end of the top screw retracts into the inside of the screw hole.

7. The plastic encapsulation mold according to claim 6, characterized in that: A plurality of screw holes are sequentially arranged along the length direction of the blocking bar, and each of the screw holes is provided with the top screw.

8. The plastic encapsulation mold according to claim 6, characterized in that: A disc is also arranged on the top end of the top screw.

9. The plastic encapsulation mold according to claim 6, characterized in that: The total length of the top screw is not greater than the length of the screw hole.

10. A plastic packaging device, characterized in that: It comprises the plastic encapsulation mold as described in any one of claims 1 to 9.

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