Latent injection mold

Abstract

The utility model provides a kind of latent injection-molding mould, the injection-molding mould is set by latent gate on the end face of slider close to lower mould mould core, latent gate is communicated with forming cavity, it is convenient to disconnect latent gate with product by moving slider;By setting ejecting hole on the position below lower injection channel on slider, second ejector rod is located in the position of moving a slider exit stroke to the direction of slider exit relative to ejecting hole, it is convenient to eject the scrap head left in slider by second ejector rod after mould opening ends;After first ejector rod passes through lower mould plate, lower mould mould core in turn, and with upper mould mould core, lower mould mould core, slider jointly form forming cavity, it is convenient to eject product by first ejector rod after mould opening ends.The latent injection-molding mould of the utility model saves the action of mechanical hand or artificial grabbing scrap head, saves time and labor, and improves product production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a submerged injection mold. Background Technology

[0002] As people's requirements for the appearance of various daily and industrial products increase, the requirements for the appearance of various plastic products also increase. Naturally, appearance has become an important factor for people to evaluate the appearance of products. Among them, the gate location, gate marks, weld lines, etc. have become one of the factors that affect people's acceptance of products.

[0003] Molds are an indispensable tool in injection molding. Injection molding is a processing method in which hot, molten plastic material is injected at high speed into a closed cavity of the desired shape. After the plastic material cools and solidifies, the mold is opened and the solidified plastic product is ejected, thus obtaining the molded product. Because injection molding has the advantages of low molding cost, short molding cycle, simple molding process, and ease of molding complex shapes, it is widely used in the field of plastic product applications.

[0004] However, in most existing injection molds, the sprue cannot automatically detach after injection molding and must be removed manually or by a robot. This often results in incomplete sprue removal, and over time, the sprue may be pressed into the mold when the upper and lower molds close. This prevents production and requires mold repair, causing significant disruption to normal operations. Furthermore, it can cause the injection point to be located at the center of the outer surface of the product, leaving injection marks that directly affect its appearance. Utility Model Content

[0005] To address the problem in existing injection molds where the waste material head cannot automatically detach after injection molding and mold opening, this utility model provides a submerged injection mold.

[0006] This utility model discloses a submerged injection mold, comprising an upper mold assembly, a lower mold assembly, and an ejection mechanism. The upper mold assembly includes an upper template, a sprue plate, an upper mold core, and an inclined guide post. The sprue plate is positioned above the upper template. An upper injection groove is provided on the end face of the upper template near the sprue plate, communicating with the gate on the sprue plate. The upper mold core is fixed to the upper template and has a first runner. A second runner is provided on the upper template above the first runner, communicating with the upper injection groove via the second runner. The inclined guide post is fixed to the upper template at a position on one side of the upper mold core. The lower mold assembly includes a lower template, a lower mold core, and a slider. A locking module is provided between the upper and lower templates. The lower mold core is fixed to the lower template at a position corresponding to the upper mold core. The slider is slidably mounted on the lower template and has an inclined hole. The lower end of the inclined guide post is inserted into the inclined hole. The end face of the slider near the upper mold assembly has a groove corresponding to the first runner. The corresponding lower injection groove has a sprue on the end face of the slider near the lower mold core, located below the lower injection groove. The slider has a third runner inside, and the sprue is connected to the lower injection groove through the third runner. The slider has an ejector hole located below the lower injection groove, and the ejector hole is connected to the lower injection groove. The ejection mechanism includes an ejector plate, an ejector element, a first ejector rod, and a second ejector rod. The ejector plate is set on the lower mold assembly. One end of the first ejector rod is fixed on the ejector plate, and the other end of the first ejector rod passes through the lower mold plate and the lower mold core in sequence, and together with the upper mold core, the lower mold core, and the slider, forms a molding cavity. The sprue is connected to the molding cavity, and the lower injection groove is connected to the first runner. The ejector element is set in the ejector hole. One end of the second ejector rod is fixed on the ejector plate, and the other end of the second ejector rod passes through the lower mold plate and contacts the surface of the slider away from the upper mold assembly. The second ejector rod is located at a position relative to the ejector hole, moving in the direction of slider withdrawal by one slider withdrawal stroke.

[0007] Preferably, the first push rod includes a fixed part and a forming part, the fixed part is connected to the forming part, the fixed part is fixed on the push plate, the outer diameter of the forming part is smaller than the outer diameter of the fixed part, and a forming part is provided at the end of the forming part away from the fixed part.

[0008] Preferably, the first flow channel and the second flow channel are arranged coaxially. Furthermore, the cross-sectional areas of both the first and second flow channels gradually decrease from top to bottom, and the maximum cross-sectional area of ​​the first flow channel is not greater than the minimum cross-sectional area of ​​the second flow channel.

[0009] Preferably, the cross-sectional area of ​​the third flow channel gradually decreases from the end furthest from the submersible gate to the end closest to the submersible gate.

[0010] Preferably, the ejector includes an upper ejector and a lower ejector, which are connected. The outer diameter of the upper ejector is smaller than that of the lower ejector. The ejection hole includes an upper ejection groove and a lower ejection groove, which are connected. The inner diameter of the upper ejection groove is smaller than that of the lower ejection groove. The lower ejector is located within the lower ejection groove. The end of the upper ejector away from the lower ejector passes through the lower ejection groove and is inserted into the upper ejection groove. The outer diameter of the lower ejector is larger than that of the upper ejection groove. A first distance exists between the end face of the lower ejector near the upper ejector and the bottom surface of the lower ejection groove. Further, the first distance is not less than the vertical distance between the end face of the slider where the lower inlet groove is located and the submersible gate.

[0011] Preferably, the outer diameter of the second push rod is smaller than the inner diameter of the push hole.

[0012] Preferably, the injection mold further includes a guide post that connects the upper mold assembly and the lower mold assembly.

[0013] Preferably, the end face of the ejector near the lower glue inlet groove is coplanar with the bottom surface of the lower glue inlet groove.

[0014] Compared with existing technologies, this utility model provides a submerged injection mold. By setting a locking buckle between the upper and lower mold plates, the sprue plate separates from the upper mold plate first, allowing the waste material generated during injection in the first injection channel to be extracted from the upper mold plate. A submerged gate is provided on the end face of the slider near the lower mold core, communicating with the molding cavity, facilitating disconnection of the gate from the product by moving the slider. An ejector hole is provided on the slider below the lower injection groove, and a second ejector pin is positioned relative to the ejector hole, moving one slider exit stroke in the direction of slider withdrawal, facilitating the ejection of the waste material remaining in the slider after mold opening. The first ejector pin passes sequentially through the lower mold plate and lower mold core, forming the molding cavity together with the upper mold core, lower mold core, and slider, facilitating the ejection of the product after mold opening. This submerged injection mold eliminates the need for robotic arms or manual handling of waste material, saving time and labor, and improving production efficiency. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a latent injection mold according to an embodiment of the present invention.

[0017] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle. Detailed Implementation

[0018] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0019] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0020] Please refer to the above. Figure 1 and Figure 2 The present invention relates to a submerged injection mold, comprising an upper mold assembly 10, a lower mold assembly 20, and an ejection mechanism.

[0021] The upper mold assembly 10 includes an upper mold plate 11, a sprue plate 12, an upper mold core 13, and an inclined guide post 14. The sprue plate 12 is disposed above the upper mold plate 11. An upper injection groove 111 is provided on the end face of the upper mold plate 11 near the sprue plate 12. The upper injection groove 111 is connected to the gate on the sprue plate 12. The upper mold core 13 is fixed on the upper mold plate 11. A first runner 131 is provided on the upper mold core 13. A second runner 112 is provided on the upper mold plate 11 above the first runner 131. The first runner 131 is connected to the upper injection groove 111 through the second runner 112 to form a first injection channel in the upper mold plate: upper injection groove 111 → second runner 112 → first runner 131. The inclined guide post 14 is fixed on the upper mold plate 11 at a position on one side of the upper mold core 13.

[0022] The lower mold assembly 20 includes a lower template 21, a lower mold core 22, and a slider 23. A locking module 1 is provided between the upper template 11 and the lower template 21 to fix the upper template 11 and the lower template 21, preventing them from opening immediately and thus preventing mold displacement. The lower mold core 22 is fixed on the lower template 21 at a position corresponding to the upper mold core 13. The slider 23 is slidably mounted on the lower template 21 and has an inclined hole 231. The lower end of the inclined guide post 14 is inserted into the inclined hole 231. The end face of the slider 23 near the upper mold assembly 10 is provided with... There is a lower inlet groove 232 corresponding to the first flow channel 131. A submersible gate 233 is provided on the end face of the slider 23 near the lower mold core 22, below the lower inlet groove 232. A third flow channel 234 is provided inside the slider 23. The submersible gate 233 is connected to the lower inlet groove 232 through the third flow channel 234 to form a second inlet channel in the slider 23: lower inlet groove 232 → third flow channel 234 → submersible gate 233. An ejector hole 235 is provided on the slider 23 below the lower inlet groove 232, and the ejector hole 235 is connected to the lower inlet groove 232.

[0023] The ejection mechanism includes an ejection plate 31, an ejector 32, a first ejector rod 33, and a second ejector rod 34. The ejection plate 31 is mounted on the lower mold assembly 20.

[0024] One end of the first ejector pin 33 is fixed on the ejector plate 31. The other end of the first ejector pin 33 passes through the lower mold plate 21 and the lower mold core 22 in sequence, and together with the upper mold core 13, the lower mold core 22 and the slider 23, they form the molding cavity 2. The sprue 233 is connected to the molding cavity 2, and the lower injection groove 232 is connected to the first runner 131 to form a complete injection path on the sprue plate 12: gate → first injection channel → second injection channel → molding cavity 2, so as to realize the injection molding of product 100. At the same time, after the mold is opened, the first ejector pin 33 can push product 100 upward.

[0025] Ejector 32 is disposed within ejector hole 235. One end of second ejector rod 34 is fixed to ejector plate 31, and the other end of second ejector rod 34 passes through lower mold plate 21 and contacts the surface of slider 23 away from upper mold assembly 10. Second ejector rod 34 is positioned at a position where it has moved one slider exit stroke relative to ejector hole 235 in the direction of slider 23 exit, so that after mold opening, second ejector rod 34 can be inserted upward into ejector hole 235, pushing ejector 32 upward to eject the waste material head in second injection channel. The "slider exit stroke" mentioned here refers to the maximum distance that slider 23 moves away from lower mold core 22 under the action of inclined guide post 14 during mold opening.

[0026] Preferably, the first ejector rod 33 includes a fixed part 331 and a forming part 332. The fixed part 331 is connected to the forming part 332. The fixed part 331 is fixed on the ejector plate 31. The outer diameter of the forming part 332 is smaller than the outer diameter of the fixed part 331. The end of the forming part 332 away from the fixed part 331 is provided with a forming part so as to form a forming cavity 2 together with the upper mold core 13, the lower mold core 22, and the slider 23.

[0027] Preferably, the first flow channel 131 and the second flow channel 112 are coaxially arranged to facilitate glue injection. Further, the cross-sectional areas of the first flow channel 131 and the second flow channel 112 gradually decrease from top to bottom, and the maximum cross-sectional area of ​​the first flow channel 131 is not greater than the minimum cross-sectional area of ​​the second flow channel 112, so as to facilitate the extraction of waste material heads in the first glue injection channel.

[0028] Preferably, the cross-sectional area of ​​the third flow channel 234 gradually decreases from the end furthest from the submersible gate 233 to the end closest to the submersible gate 233, so as to facilitate the extraction of waste material heads from the second glue inlet channel.

[0029] Preferably, the outer diameter of the second ejector pin 34 is smaller than the inner diameter of the ejector hole 235, so that the second ejector pin 34 can be inserted into the ejector hole 235 after the mold opening is completed, and push the ejector 32 upward to eject the waste material head in the second glue inlet channel.

[0030] Preferably, the end face of the ejector 32 near the lower glue inlet groove 232 is coplanar with the bottom surface of the lower glue inlet groove 232 to prevent glue from flowing into the ejector hole 235.

[0031] Preferably, the injection mold further includes a guide post 3, which connects the upper mold assembly 10 and the lower mold assembly 20 to guide the upper mold plate 11 and the lower mold plate 21 to align in the correct position.

[0032] Preferably, the ejector 32 includes an upper ejector and a lower ejector, which are connected. The outer diameter of the upper ejector is smaller than that of the lower ejector. The ejection hole 235 includes an upper ejection groove and a lower ejection groove, which are connected. The inner diameter of the upper ejection groove is smaller than that of the lower ejection groove. The lower ejector is located in the lower ejection groove. The end of the upper ejector that is away from the lower ejector passes through the lower ejection groove and is inserted into the upper ejection groove. The outer diameter of the lower ejector is larger than that of the upper ejection groove to prevent the ejector 32 from detaching upward from the ejection hole 235. There is a first distance between the end face of the lower ejector near the upper ejector and the bottom surface of the lower ejection groove, so that it can move upward under the action of the second ejector rod 34 to eject the waste head in the second glue inlet channel.

[0033] Furthermore, the first distance is not less than the vertical distance between the end face of the slider 23 where the lower glue inlet 232 is located and the submersible gate 233, so as to ensure that the waste head in the second glue inlet channel can be completely ejected.

[0034] Mold opening process: Under the action of the mold locking buckle 4, the sprue plate 12 first separates from the upper mold plate 11, and the waste head generated during injection in the first injection channel is pulled out from the upper mold plate 11; then, the upper mold plate 11 and the lower mold plate 21 separate, and the inclined guide post 14 drives the slider 23 to move away from the lower mold core 22, so that the sprue 233 is disconnected from the product 100, and the waste head in the second injection channel is retained in the slider 23, and moves with the slider 23 for a set exit stroke; then, the slider 23 stops moving, the second ejector 34 is located directly below the ejector hole 235, and the ejector plate 31 moves to make the first ejector 33 and the second ejector 34 move upward at the same time. The first ejector 33 ejects the product 100, and the second ejector 34 ejects the waste head in the second injection channel.

[0035] This utility model discloses a submerged injection mold. A locking latch is installed between the upper and lower mold plates, allowing the sprue plate to separate from the upper mold plate first, thus extracting the waste material generated during injection in the first injection channel from the upper mold plate. A submerged gate is provided on the end face of the slider near the lower mold core, communicating with the molding cavity, facilitating disconnection of the gate from the product by moving the slider. An ejector hole is provided on the slider below the lower injection channel, and a second ejector pin is positioned relative to the ejector hole, moving one slider exit stroke in the direction of slider withdrawal, facilitating the ejection of the waste material remaining in the slider after mold opening. The first ejector pin passes sequentially through the lower mold plate and lower mold core, forming the molding cavity together with the upper mold core, lower mold core, and slider, facilitating the ejection of the product after mold opening. This submerged injection mold eliminates the need for robotic arms or manual handling of waste material, saving time and labor, and improving product production efficiency.

[0036] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. Furthermore, the technical features involved in the different embodiments of this utility model described above can be combined with each other as long as they do not conflict with each other. It must be pointed out that the disclosed embodiments do not limit the scope of this utility model. On the contrary, any modifications and refinements made without departing from the spirit and scope of this utility model are within the patent protection scope of this utility model.

Claims

1. A latent injection mold, characterized in that, Includes upper mold assembly, lower mold assembly, and ejection mechanism; The upper mold assembly includes an upper mold plate, a sprue plate, an upper mold core, and an inclined guide post. The sprue plate is disposed above the upper mold plate. The upper mold plate has an upper inlet groove on its end face near the sprue plate. The upper inlet groove communicates with the gate on the sprue plate. The upper mold core is fixed on the upper mold plate. The upper mold core has a first runner. The upper mold plate has a second runner located above the first runner. The first runner communicates with the upper inlet groove through the second runner. The inclined guide post is fixed on the upper mold plate at a position on one side of the upper mold core. The lower mold assembly includes a lower template, a lower mold core, and a slider. A locking module is provided between the upper template and the lower template. The lower mold core is fixed on the lower template at a position corresponding to the upper mold core. The slider is slidably disposed on the lower template and has an oblique hole. The lower end of the oblique guide post is inserted into the oblique hole. The end face of the slider near the upper mold assembly has a lower injection groove corresponding to the first flow channel. The end face of the slider near the lower mold core has a submersible gate located below the lower injection groove. The slider has a third flow channel inside and the submersible gate communicates with the lower injection groove through the third flow channel. The slider has an ejector hole located below the lower injection groove and the ejector hole communicates with the lower injection groove. The ejection mechanism includes an ejection plate, an ejector component, a first ejector rod, and a second ejector rod. The ejection plate is disposed on the lower mold assembly. One end of the first ejector rod is fixed on the ejection plate, and the other end of the first ejector rod passes through the lower mold plate and the lower mold core in sequence, and together with the upper mold core, the lower mold core, and the slider, forms a molding cavity. The sprue communicates with the molding cavity, and the lower injection groove communicates with the first runner. The ejector component is disposed in the ejection hole. One end of the second ejector rod is fixed on the ejection plate, and the other end of the second ejector rod passes through the lower mold plate and contacts the surface of the slider away from the upper mold assembly. The second ejector rod is located at a position relative to the ejection hole that moves in the direction of slider withdrawal by the slider withdrawal stroke.

2. The latent injection mold as described in claim 1, characterized in that, The first push rod includes a fixed part and a forming part. The fixed part is connected to the forming part and is fixed to the push plate. The outer diameter of the forming part is smaller than the outer diameter of the fixed part. A forming portion is provided at the end of the forming part away from the fixed part.

3. The submerged injection mold as described in claim 1, characterized in that, The first flow channel and the second flow channel are coaxially arranged.

4. The submerged injection mold as described in claim 3, characterized in that, The cross-sectional areas of the first flow channel and the second flow channel gradually decrease from top to bottom, and the maximum cross-sectional area of ​​the first flow channel is not greater than the minimum cross-sectional area of ​​the second flow channel.

5. The latent injection mold as described in claim 1, characterized in that, The cross-sectional area of ​​the third flow channel gradually decreases from the end furthest from the submersible gate to the end closest to the submersible gate.

6. The latent injection mold as described in claim 1, characterized in that, The ejector includes an upper ejector and a lower ejector, which are connected. The outer diameter of the upper ejector is smaller than that of the lower ejector. The ejection hole includes an upper ejection groove and a lower ejection groove, which are connected. The inner diameter of the upper ejection groove is smaller than that of the lower ejection groove. The lower ejector is located in the lower ejection groove. The end of the upper ejector away from the lower ejector passes through the lower ejection groove and is inserted into the upper ejection groove. The outer diameter of the lower ejector is larger than that of the upper ejection groove. There is a first distance between the end face of the lower ejector near the upper ejector and the bottom surface of the lower ejection groove.

7. A latent injection mold as described in claim 6, characterized in that, The first distance is not less than the vertical distance between the end face of the slider where the lower glue inlet groove is located and the submersible gate.

8. The latent injection mold as described in claim 1, characterized in that, The outer diameter of the second push rod is smaller than the inner diameter of the push hole.

9. A latent injection mold as described in claim 1, characterized in that, It also includes guide posts, which connect the upper mold assembly and the lower mold assembly.

10. A latent injection mold as described in claim 1, characterized in that, The end face of the ejector near the lower glue inlet groove is coplanar with the bottom surface of the lower glue inlet groove.

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