Glue pouring equipment and forming mold thereof

Abstract

The utility model relates to the technical field of glue forming, in particular to glue pouring equipment and a forming mold thereof. The forming die comprises a forming die core set, a first die set and a second die set, the forming die core set comprises an annular forming die core and an annular breathable film, the annular forming die core comprises a die core left wall, a die core bottom wall and a die core right wall which are sequentially connected to form a forming groove, the first die set and the second die set clamp a workpiece in the forming groove to form a forming cavity, one part of the annular breathable film is inserted into the top face of the die core right wall, and the other part of the annular breathable film is inserted into the forming cavity. One part abuts between the inner surface of the workpiece and the right wall of the mold core. The glue pouring equipment comprises a glue pouring needle and the forming mold, and the glue pouring needle pours glue into the forming cavity in the forming mold so that glue can be formed on the workpiece. According to the glue filling equipment and the forming mold thereof, bubbles generated in the glue filling process can be effectively eliminated, and the product yield is improved.

Description

Technical Field

[0001] This application relates to the field of adhesive molding technology, specifically to an adhesive dispensing device and its molding die. Background Technology

[0002] Polymer casting is a process in which liquid adhesive is poured into a specific mold cavity and cured under certain conditions to obtain a product with a specific shape, size, and properties. Polymer casting is also suitable for secondary molding on the surface of existing workpieces to form desired complex structures. When casting onto the surface of a workpiece, the workpiece is usually fixed in a mold, and a specific molding cavity is constructed on the workpiece surface. However, to ensure the sealing of the molding cavity during the casting process, soft materials such as silicone are often used to bond with the workpiece to form a sealed molding space. While this approach effectively improves the sealing effect, it can lead to air being trapped inside the molding cavity during the casting process, resulting in air bubbles in the final product. The presence of these air bubbles not only affects the appearance quality of the product but may also reduce its structural strength and durability. Utility Model Content

[0003] In view of the above, it is necessary to propose a glue dispensing equipment and its molding die, which can effectively eliminate air bubbles generated during the glue dispensing and molding process and improve production yield.

[0004] This application provides a molding die, including: a first module and a second module for mold fitting; and a molding core assembly, including an annular molding core and an annular breathable membrane. The annular molding core includes a left wall, a bottom wall, and a right wall of the core connected in sequence to form a molding groove. The first module and the second module clamp the workpiece in the molding groove to form a molding cavity. A portion of the annular breathable membrane is inserted into the top surface of the right wall of the core, and a portion abuts against the inner surface of the workpiece and the right wall of the core.

[0005] The aforementioned molding die includes a first module and a second module for mold closing adaptation. When the mold is closed, the first module and the second module can clamp the molding core assembly and the workpiece. The workpiece mates with the molding groove of the molding core assembly to form a molding cavity, which is used for injection molding. An annular permeable membrane is provided on the top surface of the right wall of the molding core. When the mold is closed, the annular permeable membrane abuts against the inner surface of the workpiece. The annular permeable membrane allows only air to pass through, while preventing liquid from passing through. Thus, during injection molding, air bubbles generated during the injection process can be effectively eliminated, improving production yield.

[0006] In some embodiments, the annular breathable membrane includes a first breathable portion, a second breathable portion, and a third breathable portion connected in sequence to form a U-shape. The first breathable portion is inserted into the top surface of the right wall of the mold core, the second breathable portion is attached to the top surface of the right wall of the mold core and abuts against the inner surface of the workpiece, and the third breathable portion is attached to one side wall of the right wall of the mold core.

[0007] In some embodiments, one side of the right wall of the mold core has a stepped extension surface; the annular breathable membrane further includes a fourth breathable part in an annular shape, one end of the fourth breathable part is connected to the third breathable part, and the other end is attached to the stepped extension surface, and the plane where the fourth breathable part is located is parallel to the plane where the second breathable part is located.

[0008] In some embodiments, the annular breathable membrane further includes a plurality of connecting ears, which are spaced apart and connected to the side of the fourth breathable portion away from the third breathable portion and extend to the right wall of the mold core.

[0009] In some embodiments, the distance between the side of the right wall of the mold core facing the left wall of the mold core and the first vent is in the range of 0.05mm to 0.1mm, the depth of the first vent is inserted into the right wall of the mold core is in the range of 0.14mm to 0.2mm, and the thickness of the annular ventilated membrane is in the range of 0.07mm to 0.1mm.

[0010] In some embodiments, the first module includes an upper template and an injection sleeve. The upper template has a receiving hole that penetrates the upper template. The injection sleeve is held in the receiving hole. The injection sleeve has an injection hole that communicates with the molding cavity.

[0011] In some embodiments, the inner wall of the receiving hole has a positioning protrusion, and the outer wall of the injection sleeve has a snap-fit ​​groove adapted to the positioning protrusion. When the injection sleeve is installed in the receiving hole, the positioning protrusion snaps into the snap-fit ​​groove.

[0012] In some embodiments, the second module includes a lower template and a plurality of abutment components. The lower template has a plurality of stepped grooves corresponding to the abutment components. The abutment components include a locking attachment, a abutment sleeve, and an elastic member. The abutment sleeve is disposed in the stepped groove. The locking attachment connects the abutment sleeve to the bottom of the stepped groove. The end of the abutment sleeve away from the locking attachment has an abutment lug. Part of the abutment lug is disposed in the stepped groove, and the other part is exposed in the stepped groove. The two ends of the elastic member abut against the stepped surface in the stepped groove and between the abutment lug.

[0013] In some embodiments, the second module further includes two locking handles, which are rotatably connected to both sides of the lower template, and are used to lock the first module when the mold is closed.

[0014] This application also provides a dispensing device, including a dispensing needle and the above-mentioned molding die, wherein the dispensing needle dispenses glue into the molding cavity in the molding die to form glue on the workpiece. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the molding die provided in an embodiment of this application.

[0016] Figure 2 for Figure 1 The diagram shows the exploded structure of the molding die.

[0017] Figure 3 for Figure 2 The diagram shows another angle of the upper mold and the workpiece.

[0018] Figure 4 for Figure 3 The diagram shows a cross-sectional view of the upper mold and the workpiece along the IV-IV direction.

[0019] Figure 5 for Figure 4 The diagram shows an enlarged view of the positions V of the upper mold and the workpiece.

[0020] Figure 6 for Figure 2 The diagram shows another angle of the upper mold structure.

[0021] Figure 7 for Figure 2 The diagram shows a cross-sectional view of the molding die along the VII-VII direction.

[0022] Figure 8 for Figure 2 The diagram shows a cross-sectional view of the molding die along the VIII-VIII direction.

[0023] Explanation of main component symbols: Molding mold 100, First module 10, Upper template 11, Accommodating hole 111, Positioning protrusion 112, Filling sleeve 12, Filling hole 121, Snap-fit ​​groove 122, Limiting protrusion 123, Second module 20, Lower template 21, Step groove 211, Supporting component 22, Locking accessory 221, Supporting sleeve 222, Supporting lug 2221, Elastic element 223, Snap-fit ​​handle 23, Molding core assembly 30, Annular molding core 31, Left wall of core 311, Bottom wall of core 312, Right wall of core 313, Step extension surface 3131, Molding groove 314, Annular ventilated membrane 32, First ventilated part 321, Second ventilated part 322, Third ventilated part 323, Fourth ventilated part 324, Connecting lug 325, Molding cavity 40, Workpiece 200. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0028] Please see Figure 1 , Figure 2 and Figure 3 This application provides a molding die 100 for forming a molded part (not shown) on a workpiece 200. The molded part has the same structure as the molding cavity 40 described below. In this embodiment, the molding die 100 is used to apply adhesive to the surface of the workpiece 200 to form a molded part on the surface of the workpiece 200. The workpiece 200 can be a display screen, a glass panel of a tablet, a back cover, or other products. The molding die 100 includes a first module 10 and a second module 20 that fit together, as well as a molding core assembly 30.

[0029] Specifically, please see Figure 2 , Figure 3 and Figure 4The first module 10 and the second module 20 are fitted together. The molding core assembly 30 includes an annular molding core 31 and an annular breathable membrane 32. The annular molding core 31 includes a left wall 311, a bottom wall 312, and a right wall 313 that are connected in sequence to form a molding groove 314. The first module 10 and the second module 20 clamp the workpiece 200 in the molding groove 314 to form a molding cavity 40. A portion of the annular breathable membrane 32 is inserted into the top surface of the right wall 313 of the mold core, and a portion abuts against the inner surface of the workpiece 200 and the right wall 313 of the mold core.

[0030] During installation, the molding core assembly 30 is first assembled onto the first module 10, and then the workpiece 200 is assembled onto the annular molding core 31, so that the annular breathable membrane 32 on the right wall 313 of the core abuts against the inner surface of the workpiece 200, and the left wall 311 of the core abuts against the side wall of the workpiece 200, i.e., the molding groove 314 covers the workpiece 200. The left wall 311 of the core, the bottom wall 312 of the core, the right wall 313 of the core, and the inner surface of the workpiece 200 located between the left wall 311 and the right wall 313 of the core together form the molding cavity 40. It can be understood that multiple through holes can be opened at the corresponding positions of the first module 10 and the molding cavity 40 to allow for the injection of adhesive into the molding cavity 40.

[0031] The annular molding core 31 can be made of liquid silicone rubber, which has excellent elasticity and flexibility, high thermal stability, low-temperature flexibility, and good sealing performance. It is widely used in the production of products with complex shapes and high performance requirements. The annular breathable membrane 32 is a thin film material that allows gas to pass through while preventing the penetration of liquids and larger particles. During dispensing, the annular breathable membrane 32 can expel air from the molding cavity 40.

[0032] After workpiece 200 is assembled into mold core assembly 30, second module 20 is closed tightly to first module 10. Second module 20, in conjunction with first module 10, clamps mold core assembly 30 and workpiece 200. It is understood that when resin is poured into molding cavity 40, the resin exerts pressure on workpiece 200, making it prone to displacement or even detachment from mold core assembly 30, resulting in machining defects. By setting up second module 20, workpiece 200 can be clamped by first module 10 during mold closing, improving the stability of workpiece 200 positioning and thus increasing product yield.

[0033] The molding die 100 provided in this application includes a first module 10 and a second module 20 for mold closing adaptation. When the mold is closed, the first module 10 can clamp the molding core assembly 30 and the workpiece 200. The workpiece 200 cooperates with the molding groove 314 of the molding core assembly 30 to form a molding cavity 40, which is used for injection molding. An annular permeable membrane 32 is provided on the top surface of the right wall 313 of the molding core. When the mold is closed, the annular permeable membrane 32 abuts against the inner surface of the workpiece 200. The annular permeable membrane 32 allows only air to pass through, while liquid cannot pass through. Thus, during injection molding, air bubbles generated during the injection molding process can be effectively eliminated, improving production yield.

[0034] In some embodiments, see Figure 4 and Figure 5 The annular breathable membrane 32 includes a first breathable portion 321, a second breathable portion 322, and a third breathable portion 323 connected in sequence to form a U-shape. All three portions are annular. Similarly, the left wall 311, bottom wall 312, and right wall 313 of the mold core are also annular. The first breathable portion 321 is inserted into the top surface of the right wall 313, the third breathable portion 323 is attached to one side wall of the right wall 313, and the second breathable portion 322 is attached to the top surface of the right wall 313 and abuts against the inner surface of the workpiece 200. By providing the first breathable portion 321, the connection strength between the annular breathable membrane 32 and the right wall 313 of the mold core can be improved, preventing the annular breathable membrane 32 from detaching from the right wall 313. By providing the second vent 322, when the workpiece 200 is installed on the annular molding core 31, it is ensured that the workpiece 200 and the annular vent membrane 32 are in contact, that is, the molding cavity 40 is connected to the outside air through the annular vent membrane 32. By providing the third vent 323, the connection strength between the annular vent membrane 32 and the right wall 313 of the mold core can be further enhanced.

[0035] In some embodiments, see Figure 4 and Figure 5The right wall 313 of the mold core has a stepped extension surface 3131 extending from one side. The annular ventilated membrane 32 also includes a fourth ventilated part 324 in an annular shape. One end of the fourth ventilated part 324 is connected to the third ventilated part 323, and the other end is attached to the stepped extension surface 3131. The plane of the fourth ventilated part 324 is parallel to the plane of the second ventilated part 322. It can be understood that the annular mold core 31 has a certain elasticity. In order to improve the sealing between the workpiece 200 and the right wall 313 of the mold core, the workpiece 200 will press the right wall 313 of the mold core when the mold is closed. In this way, the end of the right wall 313 of the mold core connected to the annular ventilated membrane 32 will deform. In this embodiment, the deformation range is 0.1mm~0.15mm, preferably 0.12mm. When the workpiece 200 presses against the right wall 313 of the mold core and deforms, the fourth venting part 324 can ensure that an annular venting membrane 32 is always maintained between the workpiece 200 and the right wall 313 of the mold core, so that the molding cavity 40 is always connected to the outside air through the annular venting membrane 32.

[0036] In some embodiments, see Figure 6 The annular breathable membrane 32 also includes multiple connecting ears 325, which are spaced apart and connected to the side of the fourth vent 324 away from the third vent 323 and extend to the right wall 313 of the mold core. The connecting ears 325 can be sheet-like, block-like, or other structures. By providing the connecting ears 325, the connection strength between the annular breathable membrane 32 and the right wall 313 of the mold core can be improved, preventing the annular breathable membrane 32 from falling off.

[0037] In some embodiments, see Figure 4 and Figure 5 The distance between the side of the right wall 313 of the mold core facing the left wall 311 of the mold core and the first vent 321 is 0.05mm to 0.1mm. The depth of the first vent 321 inserted into the right wall 313 of the mold core is 0.14mm to 0.2mm. The thickness of the annular vent membrane 32 is 0.07mm to 0.1mm.

[0038] The distance between the side of the right wall 313 of the mold core facing the left wall 311 of the mold core and the first vent 321 is as follows: Figure 5The value 'a' shown can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, or any value between 0.05mm and 0.1mm. The specific value depends on the actual requirements and is not limited here. By leaving a certain amount of space between the right wall 313 of the mold core facing the left wall 311 of the mold core and the first vent 321, the stability of the connection between the right wall 313 of the mold core and the first vent 321 can be improved. If the distance between the right wall 313 of the mold core facing the left wall 311 of the mold core and the first vent 321 is less than 0.05mm, the right wall 313 of the mold core will not provide sufficient support for the first vent 321, making the first vent 321 prone to detachment. If the distance between the side of the right wall 313 of the mold core facing the left wall 311 of the mold core and the first venting part 321 is greater than 0.1mm, it will cause the right wall 313 of the mold core to deform when the workpiece 200 abuts against the annular venting membrane 32, and the right wall 313 of the mold core will directly abut against the workpiece 200, thereby affecting the exhaust of the annular venting membrane 32.

[0039] The first vent 321 is inserted into the right wall 313 of the mold core to the following depth: Figure 5 The value 'b' shown can be 0.14mm, 0.16mm, 0.17mm, 0.18mm, 0.2mm, or any value between 0.14mm and 0.2mm. In this embodiment, the depth to which the first venting part 321 is inserted into the right wall 313 of the mold core is twice the thickness of the annular venting membrane 32. This improves the stability of the connection between the first venting part 321 and the right wall 313 of the mold core. If the depth of the first venting part 321 inserted into the right wall 313 of the mold core is less than 0.14mm, it will affect the connection strength between the first venting part 321 and the right wall 313 of the mold core. If the depth of the first venting part 321 inserted into the right wall 313 of the mold core is greater than 0.2mm, it will affect the structural strength of the right wall 313 of the mold core itself.

[0040] The thickness of the annular breathable membrane 32 is as follows Figure 5 The value 'c' shown can be 0.07mm, 0.08mm, 0.09mm, 0.1mm, or any value between 0.07mm and 0.1mm, and is not limited here. If the thickness of the annular breathable membrane 32 is less than 0.07mm, it will affect the breathability. If the thickness of the annular breathable membrane 32 is greater than 0.1mm, it will affect the deformation of the annular breathable membrane 32, thereby affecting the accuracy of the forming cavity 40.

[0041] In some embodiments, see Figure 2 and Figure 7The first module 10 includes an upper template 11 and an injection sleeve 12. The upper template 11 has a receiving hole 111 extending through it. The injection sleeve 12 is held in the receiving hole 111 and has an injection hole 121 that communicates with the molding cavity 40. The upper template 11 can be a plate-like structure. It is understood that the upper template 11 can have multiple receiving holes 111, such as two, three, or four, with each receiving hole 111 corresponding to the molding cavity 40. The number of injection sleeves 12 is consistent with the number of receiving holes 111. Each receiving hole 111 holds one injection sleeve 12. The injection sleeve 12 is made of rubber material, so that during injection molding, it can be connected to the dispensing needle (not shown) of the dispensing equipment through the injection hole 121 of the injection sleeve 12, improving the sealing effect during dispensing.

[0042] In some embodiments, see Figure 2 and Figure 7 The inner wall of the receiving hole 111 has a positioning protrusion 112, and the outer wall of the filling sleeve 12 has a snap-fit ​​groove 122 that matches the positioning protrusion 112. When the filling sleeve 12 is installed in the receiving hole 111, the positioning protrusion 112 snaps into the snap-fit ​​groove 122. By cooperating with the positioning protrusion 112 and the snap-fit ​​groove 122 of the filling sleeve 12, the filling sleeve 12 can be directly held in the receiving hole 111 without the need for other connecting structures. This helps to reduce the production cost of the molding die 100 and facilitates the replacement of the filling sleeve 12.

[0043] In some embodiments, see Figure 2 and Figure 7 The filling sleeve 12 is also provided with a limiting protrusion 123, which is located at the end of the filling sleeve 12 facing the molding cavity 40. The limiting protrusion 123 abuts against the side of the positioning protrusion 112 facing the second module 20 to limit the filling sleeve 12. By providing the limiting protrusion 123, the position of the filling sleeve 12 can be further restricted, and the accuracy of the position of the filling sleeve 12 can be improved.

[0044] In some embodiments, see Figure 2 and Figure 8The second module 20 includes a lower template 21 and multiple abutment components 22. The lower template 21 has multiple stepped grooves 211 corresponding to the abutment components 22. Each abutment component 22 is correspondingly disposed in one stepped groove 211. The abutment component 22 includes a locking attachment 221, a abutment sleeve 222, and an elastic member 223. The abutment sleeve 222 is disposed in the stepped groove 211. The locking attachment 221 connects the abutment sleeve 222 to the bottom of the stepped groove 211. The end of the abutment sleeve 222 away from the locking attachment 221 has an abutment lug 2221. Part of the abutment lug 2221 is disposed in the stepped groove 211, and the other part is exposed in the stepped groove 211. The two ends of the elastic member 223 abut against the stepped surface in the stepped groove 211 and between the abutment lug 2221. It is understandable that during mold closing, the lower mold plate 21 needs to hold the workpiece 200 to cooperate with the upper mold plate 11 to clamp the workpiece 200, thereby forming a stable molding cavity 40. However, the dimensions of the workpiece 200 itself may have errors, which may cause the lower mold plate 21 to push different workpieces 200 with different tightness. Therefore, it is necessary to set a holding component 22 on the lower mold plate 21. The holding lug 2221 is squeezed and fully inserted into the stepped groove 211 to drive the entire lower mold plate 21 to push the workpiece 200, thereby eliminating the machining error of the workpiece 200.

[0045] In this embodiment, the stepped groove 211 corresponds to the non-applied position of the workpiece 200. The number of stepped grooves 211 can be four, six, eight, etc. The number of abutting components 22 corresponds to the number of stepped grooves 211 and can be four, six, eight, etc., as long as they can stably push against the workpiece 200, and there is no limitation here. The elastic element 223 can be a butterfly spring.

[0046] In some embodiments, see Figure 1 and Figure 2 The second module 20 also includes two locking handles 23, which are rotatably connected to both sides of the lower template 21. The locking handles 23 are used to hold the first module 10 when the mold is closed. After the first module 10 and the second module 20 are closed, rotating the locking handles 23 can clamp the first module 10 and the second module 20, further improving stability.

[0047] This application also provides a dispensing device (not shown), including a dispensing needle (not shown) and the above-mentioned molding die 100, wherein the dispensing needle dispenses adhesive into the molding cavity 40 in the molding die 100.

[0048] The working process of the molding die 100 provided in this embodiment is roughly as follows:

[0049] First, place the first module 10 on a workbench or assembly line, and assemble the molding core group 30 onto the upper template 11 of the first module 10.

[0050] Then, the workpiece 200 is installed on the annular molding core 31. During installation, the side wall of the workpiece 200 is held by the left wall 311 of the annular molding core 31, and the side of the workpiece 200 used for potting is made to abut against the annular breathable membrane 32 on the right wall 313 of the mold core to form the molding cavity 40.

[0051] Next, the second module 20 is placed over the first module 10, which is equipped with the forming mold core group 30 and the workpiece 200. When the mold is closed, the lower template 21 of the second module 20 abuts against the side of the workpiece 200 away from the annular breathable membrane 32. At this time, the locking handle 23 is fastened to the first module 10 to form the forming mold 100.

[0052] Next, the forming mold 100 is flipped over so that the second module 20 contacts the workbench or production line. At this time, the supporting component 22 contacts the workbench or production line. Due to the gravity of the forming mold 100, the supporting lug 2221 of the supporting component 22 is squeezed and then fully inserted into the step groove 211 to drive the entire lower template 21 to push the workpiece 200.

[0053] Finally, the glue-filling equipment can fill the molding cavity 40 with glue through the filling hole 121 in the filling sleeve 12. During the glue-filling process, the gas in the molding cavity 40 can be discharged through the annular breathable membrane 32, thereby avoiding defects such as bubbles after glue filling and molding.

[0054] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A molding die, characterized in that, include: The first and second modules are molded and adapted. and The forming mold core assembly includes an annular forming mold core and an annular breathable membrane. The annular forming mold core includes a left wall, a bottom wall, and a right wall of the mold core that are connected in sequence to form a forming groove. The first module and the second module clamp the workpiece in the forming groove to form a forming cavity. A portion of the annular breathable membrane is inserted into the top surface of the right wall of the mold core, and a portion abuts against the inner surface of the workpiece and the right wall of the mold core.

2. The molding die as described in claim 1, characterized in that, The annular breathable membrane includes a first breathable part, a second breathable part, and a third breathable part connected in sequence to form a U-shape. The first breathable part is inserted into the top surface of the right wall of the mold core, the second breathable part is attached to the top surface of the right wall of the mold core and abuts against the inner surface of the workpiece, and the third breathable part is attached to one side wall of the right wall of the mold core.

3. The molding die as described in claim 2, characterized in that, The right wall of the mold core has a stepped extension surface on one side; The annular breathable membrane further includes a fourth breathable part in an annular shape. One end of the fourth breathable part is connected to the third breathable part, and the other end is attached to the step extension surface. The plane where the fourth breathable part is located is parallel to the plane where the second breathable part is located.

4. The molding die as described in claim 3, characterized in that, The annular breathable membrane also includes a plurality of connecting ears, which are spaced apart and connected to the side of the fourth breathable part away from the third breathable part and extend to the right wall of the mold core.

5. The molding die as described in claim 4, characterized in that, The distance between the side of the right wall of the mold core facing the left wall of the mold core and the first vent is in the range of 0.05mm to 0.1mm, the depth of the first vent is inserted into the right wall of the mold core is in the range of 0.14mm to 0.2mm, and the thickness of the annular ventilated membrane is in the range of 0.07mm to 0.1mm.

6. The molding die as described in claim 1, characterized in that, The first module includes an upper template and an injection sleeve. The upper template has a receiving hole that penetrates the upper template. The injection sleeve is held in the receiving hole. The injection sleeve has an injection hole that communicates with the molding cavity.

7. The molding die as described in claim 6, characterized in that, The inner wall of the receiving hole has a positioning protrusion, and the outer wall of the filling sleeve has a snap-fit ​​groove that matches the positioning protrusion. When the filling sleeve is installed in the receiving hole, the positioning protrusion snaps into the snap-fit ​​groove.

8. The molding die as described in claim 1, characterized in that, The second module includes a lower template and multiple abutment components. The lower template has multiple stepped grooves corresponding to the abutment components. Each abutment component includes a locking attachment, a abutment sleeve, and an elastic element. The abutment sleeve is disposed in the stepped groove. The locking attachment connects the abutment sleeve to the bottom of the stepped groove. The end of the abutment sleeve away from the locking attachment has an abutment lug. Part of the abutment lug is disposed in the stepped groove, and the other part is exposed in the stepped groove. Both ends of the elastic element abut against the stepped surface in the stepped groove and between the abutment lug.

9. The molding die as described in claim 8, characterized in that, The second module also includes two locking handles, which are rotatably connected to both sides of the lower template. The locking handles are used to hold the first module when the mold is closed.

10. A dispensing device, characterized in that, The invention includes a dispensing needle and a molding die according to any one of claims 1-9, wherein the dispensing needle dispenses adhesive into the molding cavity in the molding die to form adhesive on the workpiece.

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