molding die

Abstract

This utility model discloses a molding die, including a middle template structure, a mold core, and inserts. The middle template structure has a main plate and upper and lower grooves respectively located on the main plate and sharing a common wall. The common wall has multiple shaped holes. The upper surface of the common wall has a main runner and branch runners surrounding the upper side of the multiple shaped holes, and the lower surface has an overflow groove surrounding the lower side of the multiple shaped holes. The depth of the overflow groove, branch runners, and main runner is on the order of micrometers. The mold core is inserted into the upper groove and has multiple grooves A that are connected to each shaped hole and a sprue group that is connected to the main runner. The insert is inserted into the lower groove and has multiple grooves B that are connected to each shaped hole. The connected grooves B, shaped holes, and grooves A together form a vertical cavity. Each shaped hole and its connected grooves A and B form upper and lower gaps respectively. This molding die can achieve a parting line close to zero and a gate-free product surface, improving product yield and reducing processing costs.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a molding mold that can achieve a product surface without a gate. Background Technology

[0002] Molding molds are commonly used equipment in rubber product processing. Traditional molding molds generally use a horizontal cavity and side gate injection method, which easily results in a full parting line around the molded product with thick burrs, requiring subsequent manual trimming. This not only increases production costs, but also makes it difficult to remove burrs from small gaps, easily leading to product appearance damage due to improper trimming, resulting in a high product scrap rate and significant production losses.

[0003] In view of the above, this utility model is hereby proposed. Summary of the Invention

[0004] To overcome the above-mentioned defects, this utility model provides a molding die with a novel and reasonable structure. It can achieve a parting line close to zero while making the burrs extremely thin and the bonding force between the burrs and the product body weak. This not only achieves the absence of gates on the product surface, greatly improving the product yield, but also completely eliminates the manual trimming process, simplifies the processing technology, and reduces processing costs.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a molding die, comprising:

[0006] The template structure includes a main plate and an upper groove and a lower groove recessed on the upper and lower surfaces of the main plate, sharing a common wall. The common wall has multiple shaped holes penetrating its upper and lower surfaces. The upper surface of the common wall has a main channel and multiple branch channels that communicate with the main channel and are correspondingly arranged around the upper side of the multiple shaped holes. The lower surface of the common wall has multiple overflow grooves correspondingly arranged around the lower side of the multiple shaped holes. The depths of the overflow grooves, the branch channels, and the main channel are all on the order of micrometers.

[0007] The mold core is inserted into the upper groove; the mold core is provided with a plurality of grooves A that are respectively connected to the plurality of mold holes and a gating system that can connect the main runner and the cold runner.

[0008] An insert is inserted into the lower groove; the insert is provided with a plurality of grooves B that are respectively connected to and communicate with a plurality of holes, and the grooves B, the holes and the grooves A that are connected to each other together form a cavity arranged vertically;

[0009] In addition, each of the aforementioned holes has an upper gap and a lower gap formed between it and the groove A and groove B that are connected to it, so as to enable the adhesive in the branch channel to flow into the cavity from the upper gap and enable the adhesive in the cavity to flow into the overflow groove from the lower gap.

[0010] As a further improvement of this utility model, the mold core is provided with a mold core body and a receiving cavity provided in the mold core body. The mold core body is positioned and inserted into the upper groove. The upper and lower ends of the receiving cavity are respectively opened on the upper and lower side surfaces of the mold core body to correspondingly form the insertion port and the glue outlet of the mold core.

[0011] The outlet end of the cold runner is inserted into the receiving cavity through the inlet;

[0012] The plurality of grooves A are respectively recessed on the lower side surface of the mold core body;

[0013] The gating system is also recessed on the lower side of the mold core body. The gating system has a main gating and multiple branch gatings that are respectively connected to the main gating and are correspondingly arranged around the multiple grooves A. The shape of the main gating matches the shape of the main gating and is connected to it. The main gating is also connected to the outlet. The shapes of the multiple branch gatings match the shapes of the multiple branch channels and are correspondingly spaced above the multiple branch channels.

[0014] As a further improvement of this utility model, the depth of the main gating system and the branch gating system are also at the micrometer level.

[0015] In addition, a core extending vertically is integrally provided on the top wall of each of the grooves A. The core is inserted into the corresponding cavity and simultaneously abuts against the bottom wall of the cavity.

[0016] As a further improvement of this utility model, the insert is provided with an upper insert that is a cover structure and is positioned and inserted in the lower groove, and a lower insert that is a block structure and is positioned and inserted in the upper insert. The top wall of the upper insert is provided with a plurality of holes A that penetrate the upper and lower surfaces of its top wall respectively, and the upper and lower surfaces of the top wall of the upper insert are also respectively recessed with a plurality of upper overflow grooves that are correspondingly arranged around the upper side of the plurality of holes A and a plurality of lower overflow grooves that are correspondingly arranged around the lower side of the plurality of holes A; the upper surface of the lower insert is recessed with a plurality of shaped pits that are respectively connected to the plurality of holes A and a plurality of upper overflow grooves A that are correspondingly arranged around the plurality of shaped pits.

[0017] The connected and interlocking holes A and pits together form the groove B; the multiple upper overflow grooves are matched with the multiple overflow grooves in shape and are positioned below the multiple overflow grooves in a corresponding manner; the multiple lower overflow grooves are matched with the multiple upper overflow grooves A in shape and are positioned above the multiple upper overflow grooves A in a corresponding manner.

[0018] As a further improvement of this utility model, the depths of the upper overflow trough, the lower overflow trough, and the upper overflow trough A are all at the micrometer level;

[0019] In addition, each of the aforementioned pits is integrally provided with a positioning post for supporting and positioning the bottom end of the core.

[0020] As a further improvement of this utility model, the depths of the overflow groove, the branch channel and the main channel are 3-6 cm.

[0021] As a further improvement of this utility model, the plurality of holes are divided into at least two groups of holes, each group of holes being composed of a plurality of holes spaced apart and arranged in a ring, and the at least two groups of holes are also spaced apart and concentrically arranged.

[0022] Correspondingly, the arrangement of the multiple branch channels and the multiple overflow channels is consistent with the arrangement of the multiple orifices.

[0023] As a further improvement of this utility model, the plurality of branch channels and the plurality of overflow channels are each annular groove structures;

[0024] The main channel is provided with multiple flow channels A, which are arc-shaped grooves, and multiple flow channels B, which are irregular grooves. The multiple flow channels A are respectively connected to the multiple branch channels, and the multiple flow channels B are respectively connected to the multiple flow channels A. One end of the multiple flow channels B also converges to connect with the glue outlet.

[0025] As a further improvement of this utility model, both the upper groove and the lower groove are circular groove structures and are arranged along the same center line;

[0026] In addition, the upper groove and the lower groove, which are arranged along the same center line and share a common wall, are collectively referred to as a processing groove group, and multiple processing groove groups are arrayed on the plate body.

[0027] As a further improvement of this utility model, an upper template, a lower template, and a base plate are also provided. The upper template, the middle template structure, the lower template, and the base plate are stacked sequentially from top to bottom and are detachably locked together by fasteners. The mold core is detachably locked to the upper template, the upper part of the insert is detachably locked to the lower template, and the lower part of the insert is detachably locked to the base plate.

[0028] The beneficial effects of this utility model are as follows: Compared with the prior art, ① the cavity in the molding die of this utility model is arranged vertically, which can not only be used to process products with more complex shapes, but also make the parting line on the product surface less noticeable, thus making the product look more beautiful. ② Based on the vertical arrangement of the cavity, this utility model further sets the runners (i.e., the main runner and the branch runners) for injecting glue into the cavity on the common wall, and connects the cold runner with the gating group on the mold core. This can achieve a direct injection processing method, which can effectively shorten the flow path of the glue from the outlet end of the cold runner to the cavity, thereby improving processing efficiency and effectively improving the problem of unstable pressure of the glue during the flow process, thus greatly improving the quality of glue injection and thus improving the quality of product molding. ③ By setting the overflow groove, the branch channel, and the main channel on the common wall respectively connected to the cavity, and simultaneously optimizing their depth, this utility model can transform the parting line formed at the splicing point into a burr formed at the splicing point. At the same time, the burr is extremely thin and has weak bonding force with the product body. Thus, after the mold is demolded, the burr can be easily removed by mechanical peeling without any burr residue. This achieves a gate-free product surface, effectively avoiding product appearance defects, greatly improving product yield, and completely eliminating the manual trimming process, simplifying the processing technology and reducing processing costs. Attached Figure Description

[0029] Figure 1 This is a partial three-dimensional structural diagram of the molding die described in this utility model (for clarity, the cold runner, part of the mold core, and part of the inserts have been omitted).

[0030] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the forming mold shown;

[0031] Figure 3 This is a three-dimensional structural diagram of the assembly of the template structure, the mold core, and the insert in this utility model.

[0032] Figure 4 for Figure 3 A cross-sectional schematic diagram of the assembly structure shown in the figure;

[0033] Figure 5 for Figure 4 An enlarged structural diagram of section B shown in the figure;

[0034] Figure 6 This is a schematic diagram of the main structure of the template structure described in this utility model;

[0035] Figure 7 for Figure 6 A partial enlarged view of the template structure shown in the image;

[0036] Figure 8 This is a rear view schematic diagram of the template structure described in this utility model;

[0037] Figure 9 for Figure 8 A partial enlarged view of the template structure shown in the image;

[0038] Figure 10 This is a partial three-dimensional structural diagram of the template structure described in this utility model (the main channel has been removed for clarity).

[0039] Figure 11 for Figure 10 A cross-sectional schematic diagram of the template structure shown in the figure;

[0040] Figure 12 for Figure 11 An enlarged structural diagram of part A shown in the image;

[0041] Figure 13 This is a schematic diagram of the mold core of this utility model from a first perspective;

[0042] Figure 14 This is a schematic diagram of the mold core of this utility model from a second perspective;

[0043] Figure 15 This is a schematic diagram of the insert of the present invention from a first-view perspective;

[0044] Figure 16 This is a structural schematic diagram of the insert described in this utility model from a second perspective.

[0045] Referring to the accompanying drawings, the following explanations are provided:

[0046] 1. Middle template structure; 10. Main plate; 11. Common wall; 12. Upper groove; 13. Lower groove; 14. Hole; 150. Main runner; 1500. Runner A; 1501. Runner B; 151. Branch runner; 16. Overflow groove; 2. Mold core; 20. Groove A; 21. Mold core body; 22. Receiving cavity; 23. Glue outlet; 24. Main sprue; 25. Branch sprue; 26. Core; 27. Insert; 3. Insert; 30. Groove B; 31. Upper insert; 310. Hole A; 311. Upper overflow groove; 312. Lower overflow groove; 32. Lower insert; 320. Recess; 321. Upper overflow groove A; 322. Positioning post; 5. Upper template; 50. Through hole; 6. Lower template; 7. Base plate. Detailed Implementation

[0047] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0048] Example 1

[0049] Please see the appendix Figure 1 To be continued Figure 16As shown, this embodiment 1 provides a molding die, which includes a cold runner, a middle template structure 1, a mold core 2, and an insert 3. The middle template structure 1 has a plate body 10 and an upper groove 12 and a lower groove 13 respectively recessed on the upper and lower surfaces of the plate body 10 and sharing a common wall 11. The common wall 11 has a plurality of holes 14 respectively penetrating its upper and lower surfaces. The upper surface of the common wall 11 has a main channel 150 and a plurality of holes respectively communicating with the main channel 150 and correspondingly surrounding it. The common wall 11 has multiple overflow channels 151 on the upper side of the multiple holes 14, and multiple overflow grooves 16 are provided on the lower surface of the common wall 11, which are correspondingly arranged around the lower side of the multiple holes 14. The depths of the overflow grooves 16, the branch channels 151 and the main channel 150 are all at the micrometer level. For example, the depths of the overflow grooves 16, the branch channels 151 and the main channel 150 can be optimized to 3-6 cm respectively. The mold core 2 is inserted into the upper groove 12. The system includes multiple grooves A20 that connect one-to-one with the multiple orifices 14, and a gating system that connects the main runner 150 with the cold runner. The insert 3 is inserted into the lower recess 13. The insert 3 has multiple grooves B30 that connect one-to-one with the multiple orifices 14. The grooves B30, orifices 14, and grooves A20 that connect and mate together form a vertically arranged cavity. It is understood that the specific shape and structure of the cavity (i.e., the grooves B30) are... 0. The specific shape and structure of the hole 14 and the groove A20 are determined according to the product structure design requirements, and this embodiment does not impose any restrictions. In addition, each hole 14 and the groove A21 and groove B30 that are connected to it are respectively provided with an upper gap G1 and a lower gap G2, so as to enable the adhesive in the branch channel 151 to flow into the cavity from the upper gap G1 and enable the adhesive in the cavity to flow into the overflow groove 16 from the lower gap G2.

[0050] As can be seen from the above, ① compared with the horizontal arrangement of the cavity in the traditional mold, the cavity in the molding mold described in this embodiment is arranged vertically. This can not only be used to process products with more complex shapes, but also make the parting line on the product surface less noticeable, thus making the product look beautiful.

[0051] ② Based on the vertical arrangement of the cavity in the molding die, this embodiment further provides the runners (i.e., the main runner 150 and the branch runner 151) for injecting the glue into the cavity on the common wall 11, and connects the cold runner with the gating system on the mold core 2. This allows the glue to be injected downwards from the cold runner into the main runner 150 and the branch runner 151, thereby achieving a direct gate injection processing method. Compared with the side gate injection process in traditional molds, the direct gate injection processing method can effectively shorten the flow path of the glue from the cold runner outlet to the cavity, thereby improving processing efficiency and effectively improving the unstable pressure of the glue during the flow process, thus greatly improving the injection quality and improving the product molding quality.

[0052] ③ In this embodiment, by providing the overflow groove 16, the branch channel 151, and the main channel 150 on the common wall 11 respectively connected to the cavity, the parting line formed at the splice (a shorthand for the seam between two different parts in the mold) can be transformed into a burr formed at the splice. Combined with the above-mentioned optimization control of the depth of the overflow groove 16, the branch channel 151, and the main channel 150, the burr can be made extremely thin and the bonding force between it and the product body is weak. In this way, the burr can be easily removed by mechanical peeling after the mold is demolded, and there will be no burr residue. Thus, the product surface is free of gates, which effectively avoids product appearance defects and greatly improves product yield. It also completely eliminates the manual trimming process, simplifies the processing technology, and reduces processing costs.

[0053] Explanation: ① The specific type of molding die may be, but is not limited to, injection molding die, flat molding die, or transfer molding die. ② The above "cmm" is a well-known unit of length measurement, also known in the industry as "silk". The conversion relationship between cmm and millimeter is: 1mm = 100cmm.

[0054] The specific structure of the molding die described in this embodiment will be described in detail below.

[0055] First, regarding the template structure 1 mentioned above.

[0056] In addition to the structural improvements described above for the template structure 1, this embodiment 1 also includes other structural improvements, such as:

[0057] Please continue to refer to the appendix. Figure 6 To be continued Figure 12As shown, in the template structure 1 of this embodiment 1, the plurality of holes 14 are divided into at least two groups of holes. Each group of holes is composed of a plurality of holes 14 spaced apart and arranged in a ring. The at least two groups of holes are also spaced apart and concentrically arranged. Correspondingly, the arrangement of the plurality of branch channels 151 and the plurality of overflow grooves 16 is consistent with the arrangement of the plurality of holes 14. It can be understood that by optimizing the arrangement of the holes 14 / branch channels 151 as described above, on the one hand, under the same model / size template, the ring arrangement adopted in this embodiment 1 can greatly increase the number of holes 14. Production verification shows that the number of holes 14 can be increased from the traditional 72 to 132. On the other hand, designing the holes 14 / branch channels 151 as a ring arrangement can ensure that the glue injection degree of the plurality of holes 14 is consistent, ensuring that the consistency and stability of product dimensions are very high.

[0058] Furthermore, based on product processing requirements, this embodiment 1 optimizes the structure of the main channel 150, the branch channel 151, and the overflow trough 16 as follows: Please refer to the appendix. Figure 7 and attached Figure 9 As shown, the multiple branch channels 151 are all annular groove structures with their openings facing upwards, and the multiple overflow grooves 16 are all annular groove structures with their openings facing downwards. The main channel 150 is provided with multiple flow channels A1500 with arc-shaped groove structures and multiple flow channels B1501 with irregular groove structures. The multiple flow channels A1500 are respectively connected to the multiple branch channels 151, and the multiple flow channels B1501 are respectively connected to the multiple flow channels A1501. One end of the multiple flow channels B1501 also converges to connect with the glue outlet 23 of the mold core 2 described below. It can be understood that based on the above structural design of the main channel 150, the glue injection degree of the multiple branch channels 151 can be made consistent, thereby making the glue injection degree of the multiple shaped holes 14 consistent.

[0059] In addition, please continue to refer to the appendix. Figure 6 Appendix Figure 8 and attached Figure 10 As shown, in the template structure 1 described in this embodiment 1, the upper groove 12 and the lower groove 13 are both circular groove structures and are arranged along the same center line; moreover, if the upper groove 12 and the lower groove 13, which are arranged along the same center line and share a common wall 11, are collectively referred to as a processing groove group, a plurality of processing groove groups are arrayed on the plate body 10.

[0060] Next, regarding the mold core 2.

[0061] Please continue to refer to the appendix. Figure 3 To be continued Figure 5 and appendix Figure 13 and attached Figure 14 As shown, in this embodiment, the mold core 2 preferably adopts the following structure: the mold core 2 is provided with a mold core body 21 positioned and inserted in the upper groove 12, a plurality of grooves A20 recessed on the lower side of the mold core body 21 according to the arrangement of a plurality of shaped holes 14, a gating system recessed on the lower side of the mold core body 21, and a receiving cavity 22 provided in the mold core body 21. The upper and lower ends of the receiving cavity 22 are respectively opened on the upper and lower side surfaces of the mold core body 21 to correspondingly form the insertion port 27 and the glue outlet of the mold core 2. The cold runner's outlet end is inserted into the receiving cavity 22 through the insertion port 27. The gating system includes a main gating 24 and multiple branch gatings 25 that are respectively connected to the main gating 24 and correspondingly arranged around the multiple grooves A20. The shape of the main gating 24 matches and is connected to the shape of the main channel 150, and the main gating 24 is also connected to the outlet 23. The multiple branch gatings 25 match and are correspondingly spaced above the multiple branch channels 151. It can be understood that the glue injected from the cold runner flows through the outlet 23 into the main channel formed by the main gating 24 and the main channel 150, and is then evenly distributed into the branch channels formed by the branch gatings 25 and the branch channels 151, and then flows into the cavity through the gaps (i.e., the upper gap G1) on the branch channels.

[0062] Furthermore, in the mold core 2 structure, the depths of the main runner 24 and the branch runner 25 are also at the micrometer level; for example, but not limited to, the depths of the main runner 24 and the branch runner 25 can be optimized to 3-6 cm respectively.

[0063] Furthermore, in the mold core 2 structure, a vertically extending core 26 is integrally provided on the top wall of each of the grooves A20. The core 26 is inserted into the corresponding cavity (according to product design requirements, the core 26 is eccentrically positioned relative to the cavity) and simultaneously abuts against the bottom wall of the cavity; see attached drawing. Figure 4 Appendix Figure 5 and attached Figure 14 As shown. Understandably, by inserting the core 26 into the bottom wall of the cavity, the stability of the core 26 can be effectively ensured, thereby guaranteeing the eccentric effect of the product. In addition, since both the branch channel 151 and the branch gating 25 used for gluing adopt an annular groove structure, the deformation phenomenon caused by the core 26 being subjected to unidirectional force for a long time can be effectively improved, further enhancing the product molding quality.

[0064] Next, regarding the insert 3.

[0065] Please continue to refer to the appendix. Figure 3 To be continued Figure 5 and appendix Figure 15 and attached Figure 16 As shown, in this embodiment, the insert 3 preferably adopts the following structure: the insert 3 has an upper insert 31, which is a cover structure and is positioned and inserted into the lower groove 13, and a lower insert 32, which is a block structure and is positioned and inserted into the upper insert 31. The upper insert 31 has a plurality of holes A310 on its top wall, which respectively penetrate the upper and lower surfaces of its top wall. The upper and lower surfaces of the top wall of the upper insert 31 also have a plurality of upper overflow grooves that are correspondingly arranged around the upper side of the plurality of holes A310. The lower insert 32 has a plurality of overflow grooves 311 and a plurality of corresponding lower overflow grooves 312 surrounding the lower side of the plurality of holes A310. The upper surface of the lower insert 32 is recessed with a plurality of shaped pits 320 that are respectively connected to the plurality of holes A310 and a plurality of corresponding upper overflow grooves A321 surrounding the plurality of shaped pits 320. The depths of the plurality of upper overflow grooves 311, the plurality of lower overflow grooves 312 and the plurality of upper overflow grooves A321 are all at the micrometer level (such as, but not limited to, 3-6 cm). Understandably, the connected and interlocking shaped holes A310 and shaped pits 320 together constitute the shaped groove B30. The multiple upper overflow grooves 311 match the shapes of the multiple overflow grooves 16 and are correspondingly spaced below the multiple overflow grooves 16, i.e., a lower gap G2 is formed between the upper overflow grooves 311 and the overflow grooves 16. Similarly, the multiple lower overflow grooves 312 match the shapes of the multiple upper overflow grooves A321 and are correspondingly spaced above the multiple upper overflow grooves A321, i.e., a gap communicating with the cavity is also formed between the lower overflow grooves 312 and the upper overflow grooves A321. Understandably, by setting the upper overflow grooves 311, lower overflow grooves 312, and upper overflow grooves A321, removable burrs are formed at the parting line location, which is conventionally formed, thereby effectively improving the product's appearance quality.

[0066] Furthermore, in the structure of the insert 3, a positioning post 322 is integrally provided in each of the recesses 320 for supporting and positioning the bottom end of the core 26, so as to improve the stability of the eccentric setting of the core 26.

[0067] Next, regarding other structures.

[0068] Please continue to refer to the appendix. Figure 1 and attached Figure 2As shown, the molding die described in this embodiment also includes an upper template 5, a lower template 6, and a base plate 7. The upper template 5, the middle template structure 1, the lower template 6, and the base plate 7 are stacked sequentially from top to bottom and detachably locked together by fasteners (including but not limited to bolts, rivets, self-tapping screws, and pins). The mold core 2 is detachably locked to the upper template 5. The upper part of the insert 3 (specifically, the upper insert 31) is detachably locked to the lower template 6, and the lower part of the insert 3 (specifically, the lower insert 32) is detachably locked to the base plate 7. It is understood that all components in the molding die are detachably connected, which facilitates the installation and maintenance of the die.

[0069] Additionally, it is understood that the upper template 5 is provided with a slot to avoid the mold core 2 and a through hole 50 for the outlet end of the cold runner to pass through; the lower template 6 is provided with a receiving hole to receive the upper insert 31, and the base plate 7 is provided with a receiving groove to receive the lower insert 32.

[0070] Finally, the suffixes "A", "B", etc. in the component names in this utility model patent specification (such as groove A, groove B, etc.) are only for the purpose of clarity of description and are not intended to limit the scope of implementation of this utility model patent.

[0071] In summary, the molding die provided by this utility model can achieve a parting line close to zero while making the burrs extremely thin and the bonding force between the burrs and the product body weak. This not only achieves a gate-free product surface, greatly improving the product yield, but also completely eliminates the manual trimming process, simplifies the processing technology, and reduces processing costs.

[0072] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A molding die, characterized in that: include: The template structure (1) includes a plate body (10) and an upper groove (12) and a lower groove (13) respectively recessed on the upper and lower surfaces of the plate body (10) and sharing a common wall (11); the common wall (11) is provided with a plurality of holes (14) that penetrate its upper and lower surfaces respectively; the upper surface of the common wall (11) is provided with a main channel (150) and a plurality of branch channels (151) that are respectively connected to the main channel (150) and are correspondingly arranged around the upper side of the plurality of holes (14); the lower surface of the common wall (11) is provided with a plurality of overflow grooves (16) correspondingly arranged around the lower side of the plurality of holes (14); the depth of the overflow grooves (16), the branch channels (151) and the main channel (150) is at the micrometer level; The mold core (2) is inserted into the upper groove (12); the mold core (2) is provided with a plurality of grooves A (20) that are respectively connected to a plurality of the mold holes (14) and a gating system that can connect the main runner (150) with the cold runner; Insert (3) is inserted into the lower groove (13); the insert (3) is provided with a plurality of grooves B (30) that are connected to a plurality of holes (14) one by one, and the grooves B (30), the holes (14) and the grooves A (20) that are connected to each other together form a cavity arranged vertically. In addition, each of the shaped holes (14) and the grooves A (20) and B (30) that are connected to each other are respectively provided with an upper gap and a lower gap, so as to enable the adhesive in the branch channel (151) to flow into the cavity from the upper gap and enable the adhesive in the cavity to flow into the overflow groove (16) from the lower gap.

2. The molding die according to claim 1, characterized in that: The mold core (2) is provided with a mold core body (21) and a receiving cavity (22) provided in the mold core body (21). The mold core body (21) is positioned and inserted into the upper groove (12). The upper and lower ends of the receiving cavity (22) are respectively opened on the upper and lower side surfaces of the mold core body (21) to form the insertion port (27) and the glue outlet (23) of the mold core (2). The outlet end of the cold runner is inserted into the receiving cavity (22) from the inlet (27); The plurality of grooves A (20) are respectively recessed on the lower side surface of the mold core body (21); The gating system is also recessed on the lower side of the mold core body (21), and the gating system is provided with a main gating system (24) and a number of branch gating systems (25) that are respectively connected to the main gating system (24) and are correspondingly arranged around the number of grooves A (20). The shape of the main gating system (24) matches the shape of the main gating system (150) and is connected to it. The main gating system (24) is also connected to the outlet (23). The shape of the number of branch gating systems (25) matches the shape of the number of branch channels (151) and is correspondingly spaced above the number of branch channels (151).

3. The molding die according to claim 2, characterized in that: The depths of the main gating (24) and the branch gating (25) are also at the micrometer level; In addition, a core (26) extending vertically is integrally provided on the top wall of each groove A (20), the core (26) being inserted into the corresponding cavity and simultaneously abutting against the bottom wall of the cavity.

4. The molding die according to claim 3, characterized in that: The insert (3) has an upper insert (31) which is a cover structure and is positioned and inserted in the lower groove (13) and a lower insert (32) which is a block structure and is positioned and inserted in the upper insert (31). The upper insert (31) has a plurality of holes A (310) that penetrate the upper and lower surfaces of its top wall respectively. The upper and lower surfaces of the top wall of the upper insert (31) are also respectively recessed with a plurality of upper overflow grooves (311) that are correspondingly arranged outside the upper side of the plurality of holes A (310) and a plurality of lower overflow grooves (312) that are correspondingly arranged outside the lower side of the plurality of holes A (310). The upper surface of the lower insert (32) is recessed with a plurality of pits (320) that are respectively connected to the plurality of holes A (310) and a plurality of upper overflow grooves A (321) that are correspondingly arranged outside the plurality of pits (320). Among them, the connected and interlocking hole A (310) and the shaped pit (320) together constitute the shaped groove B (30); the multiple upper overflow grooves (311) are matched with the multiple overflow grooves (16) in shape and are positioned below the multiple overflow grooves (16) in a corresponding gap; the multiple lower overflow grooves (312) are matched with the multiple upper overflow grooves A (321) in shape and are positioned above the multiple upper overflow grooves A (321) in a corresponding gap.

5. The molding die according to claim 4, characterized in that: The depths of the upper overflow trough (311), the lower overflow trough (312), and the upper overflow trough A (321) are all on the order of micrometers. In addition, each of the aforementioned pits (320) is integrally provided with a positioning post (322) for supporting and positioning the bottom end of the core (26).

6. The molding die according to claim 1, characterized in that: The depths of the overflow channel (16), the branch channel (151), and the main channel (150) are 3 to 6 cm, respectively.

7. The molding die according to claim 1, characterized in that: The plurality of holes (14) are divided into at least two groups of holes, each group of holes being composed of a plurality of holes (14) spaced apart and arranged in a ring, and the at least two groups of holes are also spaced apart and concentrically arranged; Correspondingly, the arrangement of the plurality of branch channels (151) and the plurality of overflow channels (16) is consistent with the arrangement of the plurality of orifices (14).

8. The molding die according to claim 2, characterized in that: The multiple branch channels (151) and the multiple overflow channels (16) are each annular groove structures; The main channel (150) is provided with multiple flow channels A (1500) with arc-shaped groove structure and multiple flow channels B (1501) with irregular groove structure. The multiple flow channels A (1500) are respectively connected to the multiple branch channels (151), and the multiple flow channels B (1501) are respectively connected to the multiple flow channels A (1500). One end of the multiple flow channels B (1501) also converges together to connect with the glue outlet (23).

9. The molding die according to claim 7, characterized in that: Both the upper groove (12) and the lower groove (13) are circular groove structures and are arranged along the same center line; In addition, the upper groove (12) and the lower groove (13) which are arranged along the same center line and share a common wall (11) are collectively referred to as a processing groove group, and multiple processing groove groups are arranged in an array on the plate body (10).

10. The molding die according to claim 1, characterized in that: It is also provided with an upper template (5), a lower template (6) and a base plate (7). The upper template (5), the middle template structure (1), the lower template (6) and the base plate (7) are stacked in sequence from top to bottom and are detachably locked together by fasteners. The mold core (2) is detachably locked to the upper template (5). The upper part of the insert (3) is detachably locked to the lower template (6) and the lower part of the insert (3) is detachably locked to the base plate (7).

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