Injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold which comprises an upper mold and a lower mold, a forming groove is formed in the top of the lower mold, a sliding block groove is formed in the top of the lower mold, a translation hole is formed in the inner wall, close to the forming groove, of the sliding block groove, a mold core is slidably arranged in the translation hole, and a pushing assembly used for driving the mold core is arranged in the sliding block groove. The pushing assembly comprises a pressing rod arranged in the sliding block groove in a sliding mode and a linkage rod arranged below the pressing rod in a sliding mode, one side of the pressing rod extends out of the sliding block groove, the pressing rod is located on the path of die assembly of the upper die, one side of the die core abuts against the linkage rod, the other side of the die core is inserted into the forming groove, and a translation assembly driving the die core to leave the forming groove is arranged on the die core. A first inclined face is formed in the bottom wall of the sliding block groove, the distance from the first inclined face to the pressing rod is gradually reduced in the direction close to the forming groove, and the linkage rod abuts against the first inclined face.

Description

Technical Field

[0001] This application relates to the technical field of injection molds, and in particular to an injection mold. Background Technology

[0002] Injection molds consist of an upper mold and a lower mold. The upper and lower molds work together to form the injection cavity.

[0003] Chinese Patent CN211868498U discloses a side-pulling injection mold, including an upper mold and a lower mold. The upper mold includes a fixed mold base plate and a cavity mold arranged from top to bottom. The lower mold includes a moving mold base plate, a push rod pad plate, a push rod fixing plate, a support plate, and a punch arranged from bottom to top. The cavity mold and the punch are aligned. The cavity mold is fixedly connected to a slanted guide post. A slider is provided on the side of the punch. The slider is connected to a side core and a horizontal slanted ejector. A guide hole is provided on the slider at a position corresponding to the slanted guide post. Limiting plates are fixedly connected to opposite sides of the support plate by screws. A first screw passes through the limiting plate and connects to the slider. A slanted ejector fixing block is provided on the side of the horizontal slanted ejector. The slanted ejector fixing block is fixedly connected to the support plate by a third screw. The slanted ejector fixing block is provided with a through hole that mates with the horizontal slanted ejector.

[0004] In the aforementioned related technologies, during the opening and closing of the upper mold, the inclined guide post slides within the slider. Due to the inclined design of the inclined guide post, the friction generated when the inclined guide post slides within the slider is relatively large, making the inclined guide post prone to wear and reducing its service life. Utility Model Content

[0005] To address the issue of wear and tear on inclined guide pillars, which reduces their service life, this application provides an injection mold.

[0006] This application provides an injection mold, which adopts the following technical solution:

[0007] An injection mold includes an upper mold and a lower mold. The lower mold has a forming groove at its top and a slider groove at its top. The slider groove has a translation hole near the inner wall of the forming groove. A mold core slides in the translation hole. A pushing assembly for driving the mold core is provided in the slider groove. The pushing assembly includes a pressure rod sliding in the slider groove and a linkage rod sliding below the pressure rod. One side of the pressure rod extends outside the slider groove and is located on the path of the upper mold closing. One side of the mold core abuts against the linkage rod, and the other side of the mold core is inserted into the forming groove. A translation assembly for driving the mold core away from the forming groove is provided on the mold core. The bottom wall of the slider groove has a first inclined surface. The distance from the first inclined surface to the pressure rod gradually decreases along the direction close to the forming groove. The linkage rod abuts against the first inclined surface.

[0008] By adopting the above technical solution, when the upper mold performs the mold closing action, the upper mold moves towards the lower mold, and the upper mold drives the pressure rod and the linkage rod to descend together. The linkage rod drives the mold core to insert into the molding groove through the guide of the first inclined surface. The driving force is transmitted through the sliding connection between the linkage rod and the first inclined surface, which reduces the wear of the linkage rod and improves the service life of the linkage rod. When the upper mold no longer applies force to the pressure rod and the linkage rod, the translation component drives the mold core to leave the molding groove, so that the molded part can be separated from the molding groove.

[0009] Optionally, the translation component includes an ejector spring sleeved outside the mold core and a sliding block fixedly connected to the end face of the mold core near the linkage rod. The sliding block is slidably connected to the linkage rod, and the ejector spring is located between the sliding block and the side wall of the slider groove near the forming groove. The ejector spring is in a compressed state.

[0010] By adopting the above technical solution, when the linkage rod pushes the mold core into the forming groove, the linkage rod compresses the ejector spring; when the linkage rod no longer drives the mold core, the ejector spring resets and drives the sliding block to move away from the forming groove, and the movement of the sliding block drives the mold core to move back into the translation hole.

[0011] Optionally, a protective block made of elastic material is provided on the end face of the pressure bar near the upper mold.

[0012] By adopting the above technical solution, when the upper die descends to drive the pressure bar, the upper die first comes into contact with the protective block. The protective block can reduce the impact force generated when the pressure bar and the upper die come into contact, thereby reducing the wear between the two and extending their service life.

[0013] Optionally, a locking block is provided in the slider groove, and a locking groove is opened on the top of the locking block. The pressure rod and the linkage rod are slidably disposed in the locking groove. The first inclined surface is provided on the bottom wall of the locking groove, and a through hole for the mold core to pass through is opened on the side wall of the locking groove near the forming groove.

[0014] By adopting the above technical solution, both the pressure rod and the linkage rod move within the locking groove, preventing the lower die from directly contacting the pressure rod and the linkage rod, thereby preventing the pressure rod and the linkage rod from wearing down the lower die during movement and improving the service life of the lower die.

[0015] Optionally, the slot is provided with a countersunk groove on the inner wall near the forming groove, and a fixing hole is provided on the bottom wall of the countersunk groove. The slider groove is provided with a threaded groove whose opening is aligned with the fixing hole on the inner wall near the forming groove. A bolt is provided in the countersunk groove, and the bolt passes through the fixing hole and is threadedly connected to the threaded groove.

[0016] By adopting the above technical solution, the locking block can be fixed in the slider groove by bolts, which prevents the locking block from moving in the slider groove during the injection molding process. At the same time, the bolts can be completely screwed into the countersunk hole, which prevents the bolts from affecting the movement of the pressure rod and the linkage rod.

[0017] Optionally, a second inclined surface is provided at the bottom of the linkage rod, and the distance from the second inclined surface to the bottom wall of the slider groove gradually decreases along the direction closer to the forming groove, and the first inclined surface and the second inclined surface are in contact.

[0018] By adopting the above technical solution, when the upper mold drives the pressure rod to descend, it will apply a vertically downward impact force to the linkage rod. Through the cooperation of the first inclined plane and the second inclined plane, the impact force applied to the linkage rod can be converted into a force that drives the linkage rod to move horizontally.

[0019] Optionally, the top of the linkage rod is provided with a third inclined surface, the distance from the third inclined surface to the bottom wall of the slider groove gradually increases along the direction close to the forming groove, the bottom of the pressure rod is provided with a fourth inclined surface, the distance from the fourth inclined surface to the bottom wall of the slider groove gradually increases along the direction close to the forming groove, and the third inclined surface and the fourth inclined surface abut against each other.

[0020] By adopting the above technical solution, when the pressure rod pushes the linkage rod to move, the cooperation between the third and fourth inclined surfaces can guide the linkage rod to slide. Compared with the transmission method of the inclined guide post and the slider, the cooperation between the third and fourth inclined surfaces can effectively reduce the wear of the pressure rod and the linkage rod.

[0021] Optionally, a roller is rotatably provided on the second inclined surface, the roller protruding from the second inclined surface and contacting the first inclined surface.

[0022] By adopting the above technical solution, the roller can replace the second inclined surface in contact with the first inclined surface, which can reduce the friction generated when the linkage rod moves, thereby reducing the wear of the linkage rod during the sliding process.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. When the upper mold closes, it moves closer to the lower mold. The upper mold drives the pressure rod and the linkage rod to descend together. The linkage rod, guided by the first inclined surface, drives the mold core to slide towards the forming groove, thus pushing the mold core to insert into the forming groove. The driving force is transmitted through the sliding connection between the linkage rod and the first inclined surface, reducing the wear of the linkage rod and increasing its service life. When the upper mold no longer applies force to the pressure rod and the linkage rod, the translation component drives the mold core out of the forming groove, allowing the formed part to detach from the forming groove.

[0025] 2. The pressure rod and linkage rod are placed in the locking groove to prevent the pressure rod and linkage rod from wearing down the lower mold during movement, thereby improving the service life of the lower mold. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the injection mold;

[0028] Figure 2 It is along Figure 1 Sectional view of line AA in the middle;

[0029] Figure 3 yes Figure 2 Enlarged schematic diagram of part B;

[0030] Figure 4 This is a schematic diagram of the push component in an injection mold.

[0031] Reference numerals: 1. Lower mold; 11. Upper mold; 12. Forming groove; 13. Locking block; 14. Slider groove; 15. Locking groove; 2. Pushing assembly; 21. Pressure rod; 22. Linkage rod; 23. Fourth inclined plane; 24. Third inclined plane; 25. Second inclined plane; 26. Roller; 27. First inclined plane; 28. Rotating shaft; 29. ​​Roller groove; 3. Translation assembly; 31. Sliding block; 32. Ejection spring; 33. Translation groove; 34. Through hole; 35. Translation hole; 36. Mold core; 4. Bolt; 41. Threaded groove; 42. Countersunk groove; 43. Fixing hole; 44. Screw part; 45. Head; 5. Protective block. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] This embodiment discloses an injection mold. (Refer to...) Figure 1 An injection mold includes an upper mold 11 and a lower mold 1. A molding groove 12 is provided on the top of the lower mold 1. When the upper mold 11 and the lower mold 1 are closed, the upper mold 11 covers the opening of the molding groove 12, and the molten material can be injected into the molding groove 12 for solidification and molding.

[0034] Reference Figure 2 The lower mold 1 has a slider groove 14 on its top. A locking block 13 is installed in the slider groove 14, and a locking groove 15 is opened on the top of the locking block 13.

[0035] Reference Figure 2 and Figure 3 The slider groove 14 has a threaded groove 41 and a translation groove 33 on its inner wall near the forming groove 12. The translation groove 33 is located above the threaded groove 41.

[0036] Reference Figure 3 The inner wall of the slot 15 near the forming groove 12 is provided with a countersunk groove 42 whose axis is aligned with the axis of the thread groove 41. The bottom wall of the countersunk groove 42 is provided with a fixing hole 43 whose axis is aligned with the axis of the thread groove 41. A bolt 4 is provided in the countersunk groove 42, which passes through the fixing hole 43 and is threadedly connected to the thread groove 41.

[0037] Reference Figure 3 Bolt 4 includes a head 45 and a threaded portion 44. The threaded portion 44 can pass through the fixing hole 43 and is threadedly connected to the threaded groove 41. The head 45 can be fully moved into the countersunk groove 42.

[0038] Reference Figure 2 The bottom wall of the translation groove 33 has a translation hole 35 that communicates with the forming groove 12. The axis of the translation hole 35 is horizontal. The inner wall of the positioning groove 15 near the translation groove 33 has a through hole 34 that communicates with the translation groove 33. A mold core 36 that can be inserted into the forming groove 12 is slidably disposed in the translation hole 35. The mold core 36 can pass through the through hole 34 and be inserted into the positioning groove 15. The mold core 36 is provided with a translation component 3 for driving the mold core 36 to move away from the forming groove 12.

[0039] Reference Figure 2 The translation component 3 includes an ejector spring 32 and a sliding block 31. The sliding block 31 is fixedly connected to the end face of the mold core 36 away from the forming groove 12.

[0040] Reference Figure 2 The ejector spring 32 is sleeved outside the mold core 36. One side of the ejector spring 32 abuts against the end face of the sliding block 31 near the forming groove 12, and the other side of the ejector spring 32 abuts against the bottom wall of the translation groove 33. When the mold core 36 is inserted into the forming groove 12, the ejector spring 32 is in a compressed state.

[0041] Reference Figure 2 and Figure 4 A pushing assembly 2 for driving the mold core 36 into the molding groove 12 is provided in the locking groove 15. The pushing assembly 2 includes a pressure rod 21 and a linkage rod 22. The pressure rod 21 is located above the linkage rod 22 and is located on the path of the upper mold 11 closing. A fourth inclined surface 23 is provided at the bottom of the pressure rod 21, and a protective block 5 is fixedly connected to the bottom wall of the pressure rod 21. The protective block 5 is made of silicone. The distance from the fourth inclined surface 23 to the bottom wall of the locking groove 15 gradually increases along the direction close to the molding groove 12.

[0042] Reference Figure 2 and Figure 4The end face of the linkage rod 22 near the sliding block 31 is slidably connected to the sliding block 31. The top of the linkage rod 22 has a third inclined surface 24 that fits against the fourth inclined surface 23, and the bottom of the linkage rod 22 has a second inclined surface 25. The distance from the third inclined surface 24 to the bottom wall of the locking groove 15 gradually increases along the direction close to the forming groove 12, and the distance from the second inclined surface 25 to the bottom wall of the locking groove 15 gradually decreases along the direction close to the forming groove 12.

[0043] Reference Figure 3 A roller groove 29 is provided on the second inclined surface 25. A rotating shaft 28 is rotatably connected within the roller groove 29. A roller 26 is fixedly connected to the outer circumference of the rotating shaft 28. The roller 26 partially protrudes from the roller groove 29 and is inserted into the locking groove 15.

[0044] Reference Figure 2 and Figure 3 The bottom of the slot 15 has a first inclined surface 27 that abuts against the roller 26. The distance from the first inclined surface 27 to the bottom wall of the slot 15 gradually decreases along the direction closer to the forming groove 12.

[0045] The implementation principle of an injection mold according to an embodiment of this application is as follows: When injection molding is required, the upper mold 11 is driven to close. During the mold closing process, the upper mold 11 abuts against the protective block 5 and drives the protective block 5, the pressure rod 21, and the linkage rod 22 to descend together. When the linkage rod 22 descends, the roller 26 rolls along the first inclined surface 27, causing the linkage rod 22 to move towards the molding groove 12. The linkage rod 22 drives the sliding block 31 and the mold core 36 to move towards the molding groove 12. The movement of the sliding block 31 compresses the ejector spring 32. When the upper mold 11 and the lower mold 1 are in contact, the pressure rod 21 and the protective block 5 are completely located in the locking groove 15. At this time, the mold core 36 is inserted into the molding groove 12.

[0046] When the injection molding is completed, the upper mold 11 is reset, so that the upper mold 11 no longer applies force to the pressure rod 21. The ejector spring 32 is reset and drives the sliding block 31 to move away from the molding groove 12, which drives the mold core 36 to be molded back into the translation hole 35. The movement of the sliding block 31 will push the linkage rod 22 to move, so that the linkage rod 22 rises along the first inclined surface 27, and the top of the pressure rod 21 and the protective block 5 extend out of the locking groove 15.

[0047] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. An injection mold comprising an upper mold (11) and a lower mold (1), the lower mold (1) having a molding groove (12) formed on the top thereof, characterized in that: The lower mold (1) has a slider groove (14) at its top. The slider groove (14) has a translation hole (35) on its inner wall near the forming groove (12). A mold core (36) is slidably disposed in the translation hole (35). A pushing assembly (2) for driving the mold core (36) is provided in the slider groove (14). The pushing assembly (2) includes a pressure rod (21) slidably disposed in the slider groove (14) and a linkage rod (22) slidably disposed below the pressure rod (21). One side of the pressure rod (21) extends outside the slider groove (14). (21) Located on the path of the upper mold (11) closing, one side of the mold core (36) abuts against the linkage rod (22), and the other side of the mold core (36) is inserted into the forming groove (12). The mold core (36) is provided with a translation component (3) to drive the mold core (36) away from the forming groove (12). The bottom wall of the slider groove (14) is provided with a first inclined surface (27). The distance from the first inclined surface (27) to the pressure rod (21) gradually decreases along the direction close to the forming groove (12). The linkage rod (22) abuts against the first inclined surface (27).

2. An injection mold according to claim 1, characterized in that: The translation component (3) includes an ejector spring (32) sleeved outside the mold core (36) and a sliding block (31) fixedly connected to the end face of the mold core (36) near the linkage rod (22). The sliding block (31) is slidably connected to the linkage rod (22). The ejector spring (32) is located between the sliding block (31) and the inner wall of the slider groove (14) near the forming groove (12). The ejector spring (32) is in a compressed state.

3. An injection mold according to claim 1, characterized in that: The end face of the pressure bar (21) near the upper mold (11) is provided with a protective block (5) made of elastic material.

4. An injection mold according to claim 1, characterized in that: A locking block (13) is provided in the slider groove (14). A locking groove (15) is provided on the top of the locking block (13). The pressure rod (21) and the linkage rod (22) are slidably disposed in the locking groove (15). The first inclined surface (27) is provided on the bottom wall of the locking groove (15). A through hole (34) for the mold core (36) to pass through is provided on the side wall of the locking groove (15) near the forming groove (12).

5. An injection mold according to claim 4, characterized in that: The slot (15) has a countersunk groove (42) on the inner wall near the forming groove (12). The bottom wall of the countersunk groove (42) has a fixing hole (43). The slider groove (14) has a threaded groove (41) with its opening aligned with the fixing hole (43) on the inner wall near the forming groove (12). A bolt (4) is provided in the countersunk groove (42). The bolt (4) passes through the fixing hole (43) and is threadedly connected to the threaded groove (41).

6. An injection mold according to claim 1, characterized in that: The bottom of the linkage rod (22) is provided with a second inclined surface (25). The distance from the second inclined surface (25) to the bottom wall of the slider groove (14) gradually decreases along the direction close to the forming groove (12). The first inclined surface (27) is in contact with the second inclined surface (25).

7. An injection mold according to claim 1, characterized in that: The top of the linkage rod (22) is provided with a third inclined surface (24), and the distance from the third inclined surface (24) to the bottom wall of the slider groove (14) gradually increases in the direction close to the forming groove (12). The bottom of the pressure rod (21) is provided with a fourth inclined surface (23), and the distance from the fourth inclined surface (23) to the bottom wall of the slider groove (14) gradually increases in the direction close to the forming groove (12). The third inclined surface (24) and the fourth inclined surface (23) abut against each other.

8. An injection mold according to claim 6, characterized in that: A roller (26) is rotatably mounted on the second inclined surface (25), and the roller (26) pushes out of the second inclined surface (25) and contacts the first inclined surface (27).

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