A precision injection mold

Abstract

The utility model provides a kind of precision injection mold, the mold includes upper die assembly, lower die assembly and sliding assembly, sliding assembly includes first sliding group, second sliding group, third sliding group and fourth sliding group, first sliding group and second sliding group are respectively arranged in the opposite two sides of lower die mould core, third sliding group and fourth sliding group are respectively arranged in the other opposite two sides of lower die mould core, by first insert, second insert, third insert, fourth insert, upper die mould core and lower die mould core between cooperation form to injection molding complex product's cavity, the production precision and production quality of injection molding product can be improved;By setting multiple first runner on upper die mould core, second runner is set in the position of each first runner above upper die plate, each first runner is communicated with upper glue tank by its corresponding second runner, and each first runner is communicated with cavity, improves glue speed, guarantees the injection molding efficiency of complex product.

Description

Technical Field

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

[0002] 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.

[0003] Currently, for products with complex structures, the production process is cumbersome, and it is difficult to guarantee the production accuracy and quality. Therefore, it is necessary to design a precision injection mold that can improve the production accuracy and quality of the product. Utility Model Content

[0004] To address the problems of cumbersome production steps and difficulty in ensuring production accuracy and quality for complex products in existing technologies, this utility model provides a precision injection mold.

[0005] This utility model discloses a precision injection mold, comprising an upper mold assembly, a lower mold assembly, and a sliding assembly. The upper mold assembly includes an upper template, a sprue plate, and an upper mold core. The sprue plate is positioned above the upper template. An upper inlet groove is provided on the end face of the upper template near the sprue plate. The upper mold core is fixed to the upper template and has multiple first flow channels. A second flow channel is provided on the upper template above each first flow channel, and each first flow channel communicates with the upper inlet groove through its corresponding second flow channel. The lower mold assembly includes a lower template and a lower mold core, with the lower mold core fixed to the lower template at a position corresponding to the upper mold core. The sliding assembly includes a first sliding group and a second sliding group. The system comprises a moving group, a third sliding group, and a fourth sliding group. The first and second sliding groups are respectively located on opposite sides of the lower mold core, while the third and fourth sliding groups are respectively located on the other opposite sides of the lower mold core. The first sliding group includes a first slider, a first inclined guide post, and a first insert. The first slider is movably mounted on the lower mold plate and has an outwardly inclined first hole. The upper end of the first inclined guide post is fixed to the upper mold plate, and the lower end of the first inclined guide post is inserted into the first inclined hole. The first insert is fixed to the side wall of the first slider near the lower mold core and fits into both the upper and lower mold cores. The second sliding group includes a second slider, a third sliding group, and a fourth sliding group. The second inclined guide post and the second insert are movably mounted on the lower mold plate. The second slider has a second inclined hole pointing outwards. The upper end of the second inclined guide post is fixed to the upper mold plate, and the lower end of the second inclined guide post is inserted into the second inclined hole. The second insert is fixed to the side wall of the second slider near the lower mold core, and the second insert fits into the upper mold core and the lower mold core. The third sliding assembly includes a third slider, a third inclined guide post, and a third insert. The third slider is movably mounted on the lower mold plate. The third slider has a third inclined hole pointing outwards. The upper end of the third inclined guide post is fixed to the upper mold plate, and the lower end of the third inclined guide post is inserted into the third inclined hole. The third insert is fixed to the side wall of the second slider near the lower mold core. The third slider is located on the side wall near the lower mold core, and the third insert fits into the upper mold core and the lower mold core. The fourth sliding group includes a fourth slider, a fourth inclined guide post, and a fourth insert. The fourth slider is movably mounted on the lower template and has an outwardly inclined fourth hole. The upper end of the fourth inclined guide post is fixed to the upper template, and the lower end of the fourth inclined guide post is inserted into the fourth inclined hole. The fourth insert is fixed on the side wall of the fourth slider near the lower mold core, and the fourth insert fits into the upper mold core and the lower mold core. The first insert, the second insert, the third insert, the fourth insert, the upper mold core, and the lower mold core together form a cavity, and each first flow channel communicates with the cavity.

[0006] Preferably, each first flow channel and its corresponding second flow channel are coaxially arranged. Furthermore, the cross-sectional area of ​​each first flow channel and its corresponding second flow channel gradually decreases from top to bottom, and the maximum cross-sectional area of ​​each first flow channel is not greater than the minimum cross-sectional area of ​​its corresponding second flow channel.

[0007] Preferably, the mold further includes an ejection assembly, which includes an ejection plate and an ejector pin assembly. The ejection plate is disposed on the lower mold assembly, and the ejector pin assembly is located directly below the cavity and fixed to the ejection plate. Further, the ejector pin assembly includes a first ejector pin, a second ejector pin, and a third ejector pin, the lower ends of which are all fixed to the ejection plate. Still further, the first ejector pin, the second ejector pin, and the third ejector pin are not located on the same straight line.

[0008] Preferably, the second insert has a molding part on its side near the lower mold core, and the end of the molding part away from the second slider is located outside the second insert.

[0009] Preferably, the number of multiple first flow channels is no less than 5.

[0010] Preferably, the first slider and the second slider, the first inclined guide post and the second inclined guide post are all symmetrically arranged about one symmetrical plane of the upper template, and the third slider and the fourth slider, the third inclined guide post and the fourth inclined guide post are all symmetrically arranged about the other symmetrical plane of the upper template.

[0011] Compared with the prior art, the precision injection mold of this utility model, through the cooperation of the first insert, second insert, third insert, fourth insert, upper mold core and lower mold core to form a cavity for injection molding of complex products, can improve the production precision and quality of injection molded products; by setting multiple first flow channels on the upper mold core, setting a second flow channel on the upper mold plate above each first flow channel, and each first flow channel being connected to the upper injection groove through its corresponding second flow channel, and each first flow channel being connected to the cavity, the injection speed is improved, ensuring the injection molding efficiency of complex products. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic diagram of the structure of a precision injection mold according to an embodiment of the present invention.

[0014] Figure 2 for Figure 1 A cross-sectional view along the AA direction.

[0015] Figure 3 for Figure 1 A cross-sectional view along the BB direction.

[0016] Figure 4for Figure 2 A magnified structural diagram of point A in the middle. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] Please refer to the above. Figures 1 to 3 The present invention provides a precision injection mold, comprising an upper mold assembly 10, a lower mold assembly 20, and a sliding assembly 30.

[0020] The upper mold assembly 10 includes an upper template 11, a sprue plate 12, and an upper mold core 13. The sprue plate 12 is disposed above the upper template 11. An upper glue inlet groove 111 is provided on the end face of the upper template 11 near the sprue plate 12. The upper mold core 13 is fixed on the upper template 11. The upper mold core 13 is provided with a plurality of first flow channels 131. A second flow channel 112 is provided on the upper template 11 above each first flow channel 131. Each first flow channel 131 is connected to the upper glue inlet groove 111 through its corresponding second flow channel 112 to form a glue inlet channel of upper glue inlet groove 111 → second flow channel 112 → first flow channel 131 within the upper mold assembly 10.

[0021] The lower mold assembly 20 includes a lower template 21 and a lower mold core 22, with the lower mold core 22 fixed on the lower template 21 at a position corresponding to the upper mold core 13.

[0022] The sliding assembly 30 includes a first sliding group 31, a second sliding group 32, a third sliding group 33 and a fourth sliding group 34. The first sliding group 31 and the second sliding group 32 are respectively disposed on opposite sides of the lower mold core 22, and the third sliding group 33 and the fourth sliding group 34 are respectively disposed on the other opposite sides of the lower mold core 22.

[0023] The first sliding assembly 31 includes a first slider 311, a first inclined guide post 312, and a first insert 313. The first slider 311 is slidably disposed on the lower template 21. The first slider 311 is provided with a first inclined hole 3111 that is inclined outward. The upper end of the first inclined guide post 312 is fixed on the upper template 11, and the lower end of the first inclined guide post 312 is inserted into the first inclined hole 3111. The first insert 313 is fixed on the side wall of the first slider 311 near the lower mold core 22. The first insert 313 fits into the upper mold core 13 and the lower mold core 22.

[0024] The second sliding assembly 32 includes a second slider 321, a second inclined guide post 322, and a second insert 323. The second slider 321 is slidably mounted on the lower template 21. The second slider 321 has an outwardly inclined second hole 3211. The upper end of the second inclined guide post 322 is fixed on the upper template 11, and the lower end of the second inclined guide post 322 is inserted into the second inclined hole 3211. The second insert 323 is fixed on the side wall of the second slider 321 near the lower mold core 22. The second insert 323 fits into the upper mold core 13 and the lower mold core 22.

[0025] The third sliding assembly 33 includes a third slider 331, a third inclined guide post 332, and a third insert 333. The third slider 331 is slidably mounted on the lower template 21. The third slider 331 has an outwardly inclined third hole 3311. The upper end of the third inclined guide post 332 is fixed on the upper template 11, and the lower end of the third inclined guide post 332 is inserted into the third inclined hole 3311. The third insert 333 is fixed on the side wall of the third slider 331 near the lower mold core 22. The third insert 333 fits into the upper mold core 13 and the lower mold core 22.

[0026] The fourth sliding assembly 34 includes a fourth slider 341, a fourth inclined guide post 342, and a fourth insert 343. The fourth slider 341 is slidably mounted on the lower template 21. The fourth slider 341 has an outwardly inclined fourth hole 3411. The upper end of the fourth inclined guide post 342 is fixed on the upper template 11, and the lower end of the fourth inclined guide post 342 is inserted into the fourth inclined hole 3411. The fourth insert 343 is fixed on the side wall of the fourth slider 341 near the lower mold core 22. The fourth insert 343 fits into the upper mold core 13 and the lower mold core 22.

[0027] The first insert 313, the second insert 323, the third insert 333, the fourth insert 343, the upper mold core 13, and the lower mold core 22 together form a cavity 3. Each first flow channel 131 is connected to the cavity 3 to form a complete injection path of upper injection groove 111 → second flow channel 112 → first flow channel 131 → cavity 3, thereby realizing the injection molding of the complex product 100.

[0028] In practical use, the side of each insert away from its corresponding slider is the forming surface, so as to form the sides of the complex product 100.

[0029] Preferably, please refer to Figure 2 Each first flow channel 131 and its corresponding second flow channel 112 are coaxially arranged to facilitate glue injection. Furthermore, the cross-sectional area of ​​each first flow channel 131 and its corresponding second flow channel 112 gradually decreases from top to bottom, and the maximum cross-sectional area of ​​each first flow channel 131 is not greater than the minimum cross-sectional area of ​​its corresponding second flow channel 112, so as to facilitate the extraction of waste material heads in the glue injection channel.

[0030] Preferably, the mold further includes an ejection assembly, which includes an ejection plate 41 and an ejector pin assembly 42. The ejection plate 41 is disposed on the lower mold assembly 20, and the ejector pin assembly 42 is located directly below the cavity 3. The ejector pin assembly 42 is fixed on the ejection plate 41 so that after the mold opening is completed, the ejector pin assembly 42 moves upward through the ejection plate 41 to eject the complex product 100.

[0031] Furthermore, the ejector assembly 42 includes a first ejector 421, a second ejector 422, and a third ejector 423. The lower ends of the first ejector 421, the second ejector 422, and the third ejector 423 are all fixed on the ejector plate 41. The upper ends of the first ejector 421, the second ejector 422, and the third ejector 423 pass through the lower template 21 and are inserted into the lower mold core 22. The gap between the side wall of each ejector 421 and the lower mold core 22 is very small to ensure that the ejector can slide freely while being sufficiently tight to prevent the molten rubber from drilling into the gap under high pressure and forming flash. After the mold is opened, the ejector plate 41 moves to move the first ejector 421, the second ejector 422, and the third ejector 423 upwards simultaneously, which facilitates the ejection of the complex product 100.

[0032] Furthermore, in order to ensure the ejection effect of the push rod assembly 42 on the structurally complex product 100, the first push rod 421, the second push rod 422, and the third push rod 433 are not located on the same straight line.

[0033] Preferably, in order to form the recessed structure on the side of the product 100, please refer to [reference needed]. Figure 2 and Figure 4 The second insert 323 has a molding part 5 on its side near the lower mold core 22, and the end of the molding part 5 away from the second slider 321 is located outside the second insert 323.

[0034] Preferably, the number of multiple first flow channels 131 is not less than 5, so as to improve the injection speed and ensure the injection molding efficiency of products with complex structures.

[0035] Preferably, the first slider 311 and the second slider 321, the first inclined guide post 312 and the second inclined guide post 322 are all symmetrically arranged about one symmetrical plane of the upper mold plate 11, and the third slider 331 and the fourth slider 341, the third inclined guide post 332 and the fourth inclined guide post 342 are all symmetrically arranged about the other symmetrical plane of the upper mold plate 11, so that when the mold is closed, each slider can drive its corresponding insert to move inward under the action of its corresponding inclined guide post, and at the same time cooperate with the upper mold core 13 and the lower mold core 22 to form the cavity 3.

[0036] Working process: When the mold opens, the sprue plate 12 first separates from the upper mold plate 11, extracting the waste material generated during injection in the injection channel; then, the upper mold plate 11 and the lower mold plate 21 separate, and each slider slides outward under the action of the corresponding inclined guide post. Each slider drives the corresponding insert to move outward, and each slider retracts to the preset position. Then, the ejector plate 61 drives each ejector rod to move upward, and each ejector rod ejects the product out of the mold. When the mold closes, each slider slides inward under the action of the corresponding inclined guide post. Each slider drives the corresponding insert to move inward. The first insert 313, the second insert 323, the third insert 333, the fourth insert 343, the upper mold core 13, and the lower mold core 22 cooperate to form the cavity 3. The glue injected by the nozzle in the opening on the sprue plate 12 enters the cavity 3 through the upper injection groove 111, the second runner 112, and the first runner 131, completing the injection molding of the complex product 100.

[0037] This utility model discloses a precision injection mold that, through the cooperation of a first insert, a second insert, a third insert, a fourth insert, an upper mold core, and a lower mold core, forms a cavity for injection molding complex products, thereby improving the production precision and quality of injection molded products. By setting multiple first runners on the upper mold core, and setting a second runner above each first runner on the upper mold plate, with each first runner connected to the upper injection groove through its corresponding second runner, and each first runner connected to the cavity, the injection speed is improved, ensuring the injection molding efficiency of complex products.

[0038] 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 precision injection mold, characterized in that, Includes upper mold assembly, lower mold assembly, and sliding assembly. The upper mold assembly includes an upper template, a sprue plate, and an upper mold core. The sprue plate is disposed above the upper template. An upper glue inlet groove is provided on the end face of the upper template near the sprue plate. The upper mold core is fixed on the upper template. The upper mold core is provided with multiple first flow channels. A second flow channel is provided on the upper template above each first flow channel. Each first flow channel is connected to the upper glue inlet groove through its corresponding second flow channel. The lower mold assembly includes a lower template and a lower mold core, wherein the lower mold core is fixed on the lower template at a position corresponding to the upper mold core; The sliding assembly includes a first sliding group, a second sliding group, a third sliding group, and a fourth sliding group. The first sliding group and the second sliding group are respectively disposed on opposite sides of the lower mold core, and the third sliding group and the fourth sliding group are respectively disposed on the other opposite sides of the lower mold core. The first sliding assembly includes a first slider, a first inclined guide post, and a first insert. The first slider is movably disposed on the lower template and has a first inclined hole pointing outward. The upper end of the first inclined guide post is fixed on the upper template, and the lower end of the first inclined guide post is inserted into the first inclined hole. The first insert is fixed on the side wall of the first slider near the lower mold core and fits with the upper mold core and the lower mold core. The second sliding assembly includes a second slider, a second inclined guide post, and a second insert. The second slider is movably disposed on the lower template and has a second inclined hole pointing outward. The upper end of the second inclined guide post is fixed on the upper template, and the lower end of the second inclined guide post is inserted into the second inclined hole. The second insert is fixed on the side wall of the second slider near the lower mold core and fits with the upper mold core and the lower mold core. The third sliding assembly includes a third slider, a third inclined guide post, and a third insert. The third slider is movably mounted on the lower template and has an outwardly inclined third hole. The upper end of the third inclined guide post is fixed on the upper template, and the lower end of the third inclined guide post is inserted into the third inclined hole. The third insert is fixed on the side wall of the third slider near the lower mold core and fits with the upper mold core and the lower mold core. The fourth sliding assembly includes a fourth slider, a fourth inclined guide post, and a fourth insert. The fourth slider is movably mounted on the lower template and has an outwardly inclined fourth hole. The upper end of the fourth inclined guide post is fixed on the upper template, and the lower end of the fourth inclined guide post is inserted into the fourth inclined hole. The fourth insert is fixed on the side wall of the fourth slider near the lower mold core, and the fourth insert fits into the upper mold core and the lower mold core. The first insert, the second insert, the third insert, the fourth insert, the upper mold core, and the lower mold core together form a cavity, and each first flow channel is connected to the cavity.

2. The precision injection mold as described in claim 1, characterized in that, Each first flow channel is coaxially arranged with its corresponding second flow channel.

3. A precision injection mold as described in claim 2, characterized in that, The cross-sectional area of ​​each first flow channel and its corresponding second flow channel gradually decreases from top to bottom, and the maximum cross-sectional area of ​​each first flow channel is not greater than the minimum cross-sectional area of ​​its corresponding second flow channel.

4. A precision injection mold as described in claim 1, characterized in that, It also includes an ejector assembly, which includes an ejector plate and an ejector rod assembly. The ejector plate is disposed on the lower mold assembly, and the ejector rod assembly is located directly below the cavity and is fixed to the ejector plate.

5. A precision injection mold as described in claim 4, characterized in that, The push rod assembly includes a first push rod, a second push rod, and a third push rod, the lower ends of which are all fixed to the ejector plate.

6. A precision injection mold as described in claim 5, characterized in that, The first push rod, the second push rod, and the third push rod are not located on the same straight line.

7. A precision injection mold as described in claim 1, characterized in that, The second insert has a molding part on its side near the lower mold core, and the end of the molding part away from the second slider is located outside the second insert.

8. A precision injection mold as described in claim 1, characterized in that, The number of the plurality of first channels is no less than five.

9. A precision injection mold as described in claim 1, characterized in that, The first slider and the second slider, the first inclined guide post and the second inclined guide post are all symmetrically arranged about one symmetrical plane of the upper template, and the third slider and the fourth slider, the third inclined guide post and the fourth inclined guide post are all symmetrically arranged about the other symmetrical plane of the upper template.

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