Injection mold integrating ejection, molding and cooling functions

Abstract

The utility model discloses an injection mold integrating ejection, molding and cooling functions, and relates to the technical field of injection molds. The lower die core is fixed to the lower die base, and the lower die core is provided with a containing area with an upward opening; the forming insert is embedded in the accommodating area of the lower mold core in a sliding manner, and the upper end surface of the forming insert forms a cavity surface of a formed product; the ejection assembly is arranged below the lower die base and comprises an ejection sliding block connected with the lower end face of the forming insert and an ejector plate connected with the lower end face of the ejection sliding block, and the ejector plate is driven by a driving mechanism to do linear reciprocating motion. The forming insert is driven to do linear reciprocating motion along the inner wall of the accommodating area of the lower mold core; the cooling water path system comprises a cooling channel arranged in the forming insert and the ejection sliding block and is used for realizing cooling liquid circulation; and the mold structure is simplified.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold that integrates ejection, molding and cooling functions. Background Technology

[0002] In the field of injection mold technology, the ejection mechanism, molding components, and cooling system of traditional injection molds are usually designed as independent structures. The ejection mechanism typically uses a separate ejector pin or ejector rod to demold the product, the molding components only perform the function of shaping the product, and the cooling system dissipates heat through fixed channels within the mold body or inserts. This separate design has the following problems: First, the independent ejection mechanism occupies internal mold space, leading to a complex mold structure and increasing assembly difficulty and manufacturing costs; second, the separation of the molding components and cooling channels makes it difficult for the cooling medium to directly act on the critical molding areas, resulting in low cooling efficiency and easily causing uneven cooling, deformation, and other quality problems in the product; third, independent functional components increase the overall size and weight of the mold, which is not conducive to the miniaturization and energy-saving requirements of equipment.

[0003] Therefore, there is an urgent need for an injection mold that can integrate ejection, molding and cooling functions to optimize mold structure, improve cooling efficiency and product quality. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] An injection mold integrating ejection, molding, and cooling functions, comprising:

[0006] Lower mold base;

[0007] The lower mold core is fixed to the lower mold base and has an upwardly opening receiving area;

[0008] A molding insert, which is slidably fitted into the receiving area of ​​the lower mold core, and the upper end face of the molding insert constitutes the cavity surface of the molded product;

[0009] An ejection assembly is disposed below the lower mold base and includes an ejection slider connected to the lower end face of the molding insert and an ejector plate connected to the lower end face of the ejection slider. The ejector plate is driven by a driving mechanism to perform linear reciprocating motion, thereby driving the molding insert to perform linear reciprocating motion along the inner wall of the receiving area of ​​the lower mold core.

[0010] The cooling water system includes cooling channels disposed within the molded insert and the ejector slider for circulating coolant.

[0011] As a further embodiment of this utility model: the cooling channel includes:

[0012] A coolant inlet channel and a coolant outlet channel are provided inside the ejector slider. One end of the coolant inlet channel extends to the lower side of the ejector slider to form an inlet, and the other end extends to the upper surface to form a first connection port. One end of the coolant outlet channel extends to the lower side of the ejector slider to form an outlet, and the other end extends to the upper surface to form a second connection port.

[0013] A cooling connection channel is provided inside the molded insert. The cooling connection channel includes an inlet section that is sealed and communicates with the first connection port, an outlet section that is sealed and communicates with the second connection port, and a detour section that connects the inlet section and the outlet section and is located near the upper end face of the molded insert.

[0014] As a further embodiment of this utility model: the cooling water system further includes an inlet pipe and an outlet pipe;

[0015] One end of the liquid inlet pipe is sealed and connected to the water inlet on the side of the lower end of the ejector slider, and the other end is connected to a coolant source to introduce coolant into the coolant inlet channel.

[0016] One end of the liquid outlet pipe is sealed and connected to the water outlet on the lower side of the ejector slider, and the other end is connected to a coolant recovery device to discharge the coolant out of the coolant outlet channel.

[0017] As a further embodiment of this utility model: the lower mold base is provided with relief grooves corresponding to the positions of the liquid inlet pipe and the liquid outlet pipe, the width of the relief groove is greater than the outer diameter of the liquid inlet pipe or the liquid outlet pipe, and the depth is not less than the maximum stroke of the molding insert.

[0018] As a further embodiment of this utility model: the outer peripheral wall of the molded insert includes three positioning and mating parts arranged from top to bottom, including a first annular positioning step, a second annular positioning step, and a third positioning and mating part;

[0019] The first annular positioning step is located at the upper part of the molded insert, the second annular positioning step is located at the middle part of the molded insert, and its outer diameter is smaller than the outer diameter of the first annular positioning step. The third positioning mating part is located at the lower part of the molded insert, and its outer diameter is smaller than the outer diameter of the second annular positioning step. The lower end face of the third positioning mating part is connected to the ejector slider.

[0020] The inner wall of the accommodating area of ​​the lower mold core is provided with a first annular positioning groove adapted to the first annular positioning step, a second annular positioning groove adapted to the second annular positioning step, and a third positioning groove adapted to the third positioning mating part.

[0021] As a further embodiment of this utility model: the first annular positioning step and the second annular positioning step are connected by a first arc-shaped transition surface;

[0022] The second annular positioning step and the third positioning mating part are connected by a second arc-shaped transition surface.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1) The ejector slider serves as both an ejector component and a molding insert, avoiding the problem of excessive internal space occupied by independent ejector mechanisms in traditional injection molds. This simplifies the mold structure, reduces mold assembly difficulty, and lowers manufacturing costs.

[0025] 2) The cooling channels of the cooling water system are set in the molding insert and the ejector slider, so that the coolant can cool the key molding areas more directly. Compared with the traditional mold design where the cooling channels are separated from the molding parts, the cooling efficiency is improved and the quality problems such as deformation caused by uneven cooling are reduced.

[0026] 3) The cooperation between the ejector slider, the molding insert, and the lower mold core integrates ejection, molding, and cooling functions, ensuring the stability of the molding insert's movement and the effectiveness of cooling, thereby improving the precision and quality of product molding and reducing the product defect rate.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the molding insert, lower mold core, and ejector slider in this utility model.

[0031] Figure 3 yes Figure 2 A schematic diagram of the exploded structure;

[0032] Figure 4 yes Figure 2 A schematic diagram of the cross-sectional structure.

[0033] The reference numerals and names in the figure are as follows:

[0034] 1. Lower mold base; 2. Lower mold core; 3. Molding insert; 4. Cavity surface; 5. Ejector slider; 6. Ejector plate; 7. Coolant inlet channel; 8. Coolant outlet channel; 9. Inlet; 10. First connection port; 11. Outlet; 12. Second connection port; 13. Cooling connection channel; 14. Inlet section; 15. Outlet section; 16. Detour section; 17. Inlet pipe; 18. Outlet pipe; 19. Relief groove; 20. First annular positioning step; 21. Second annular positioning step; 22. Third positioning mating part; 23. First annular positioning groove; 24. Second annular positioning groove; 25. Third positioning groove. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figure 1-4 In this embodiment of the invention, an injection mold integrating ejection, molding, and cooling functions includes:

[0037] Lower mold base 1;

[0038] The lower mold core 2 is fixed to the lower mold base 1 and has an upwardly opening receiving area;

[0039] The molding insert 3 is slidably fitted into the receiving area of ​​the lower mold core 2, and the upper end surface of the molding insert 3 constitutes the cavity surface 4 of the molded product.

[0040] The ejection assembly is located below the lower mold base 1 and includes an ejection slider 5 connected to the lower end face of the molding insert 3 and an ejector plate 6 connected to the lower end face of the ejection slider 5. The ejector plate 6 is driven by a driving mechanism to perform linear reciprocating motion so as to drive the molding insert 3 to perform linear reciprocating motion along the inner wall of the receiving area of ​​the lower mold core 2.

[0041] The cooling water system includes cooling channels disposed within the molded insert 3 and the ejector slider 5, for realizing coolant circulation.

[0042] In this invention, the lower mold base 1 serves as the basic support component of the entire mold, with the lower mold core 2 fixed on it, providing an upward-opening receiving area. The molding insert 3 is slidably fitted into this receiving area from top to bottom, allowing it to move linearly within the area. Simultaneously, the upper surface of the molding insert 3 forms the cavity surface 4 of the molded product, shaping it during injection molding. An ejector assembly is located below the lower mold base 1. The ejector slider 5 is connected to the lower surface of the molding insert 3, and the ejector plate 6 is connected to the lower surface of the ejector slider 5. A drive mechanism drives the ejector plate 6 to perform linear reciprocating motion, which in turn drives the ejector slider 5 and the molding insert 3 to perform linear reciprocating motion along the inner wall of the receiving area of ​​the lower mold core 2, thus achieving the ejection operation of the molded product and completing the demolding process. A cooling water system is installed within the molding insert 3 and the ejector slider 5, with coolant circulating within these channels. The heat generated during the molding process is carried away by the circulation of coolant, which cools the molding insert 3 and the ejector slider 5, and then cools the cavity surface 4 of the molded product, ensuring the quality and molding efficiency of the molded product.

[0043] During injection molding, molten plastic at high temperature is injected into the mold cavity. During the filling process, the plastic will closely adhere to the cavity surface 4. After cooling and solidification, the outer surface of the plastic product will replicate the shape, texture, size and other characteristics of the cavity surface 4. For example, if this mold is used to form a mobile phone case, then the cavity surface 4 is the back plate of the formed mobile phone case. At this time, the formed mobile phone case product can be ejected by the movement of the molding insert 3, which pushes against the back plate.

[0044] In summary, the ejector slider 5 serves as both an ejector component and works in conjunction with the molding insert 3, avoiding the problem of excessive internal space occupied by independent ejector mechanisms in traditional injection molds. This simplifies the mold structure, reduces assembly difficulty, and lowers manufacturing costs. The cooling channels of the cooling water system are located within the molding insert 3 and the ejector slider 5, allowing the coolant to directly cool critical molding areas. Compared to the traditional mold design where cooling channels are separated from molding components, this improves cooling efficiency and reduces quality issues such as deformation caused by uneven cooling. The cooperation between the ejector slider 5, the molding insert 3, and the lower mold core 2 integrates ejection, molding, and cooling functions, ensuring the stability of the molding insert 3's movement and the effectiveness of cooling. This improves the precision and quality of product molding and reduces the defect rate.

[0045] In this embodiment of the invention, the cooling channel includes:

[0046] A coolant inlet channel 7 and a coolant outlet channel 8 are formed inside the ejector slider 5. One end of the coolant inlet channel 7 extends to the lower side of the ejector slider 5 to form an inlet 9, and the other end extends to the upper surface to form a first connection port 10. One end of the coolant outlet channel 8 extends to the lower side of the ejector slider 5 to form an outlet 11, and the other end extends to the upper surface to form a second connection port 12.

[0047] A cooling connection channel 13 is provided inside the molded insert 3. The cooling connection channel 13 includes an inlet section 14 that is sealed and communicates with the first connection port 10, an outlet section 15 that is sealed and communicates with the second connection port 12, and a detour section 16 that connects the inlet section 14 and the outlet section 15 and is located near the upper end face of the molded insert 3.

[0048] The cooling water system also includes an inlet pipe 17 and an outlet pipe 18;

[0049] One end of the liquid inlet pipe 17 is sealed and connected to the water inlet 9 on the lower side of the ejector slider 5, and the other end is connected to a coolant source to introduce coolant into the coolant inlet channel 7.

[0050] One end of the liquid outlet pipe 18 is sealed and connected to the water outlet 11 on the lower side of the ejector slider 5, and the other end is connected to a coolant recovery device to discharge the coolant out of the coolant outlet channel 8.

[0051] In terms of coolant circulation path design, the coolant starts from an external coolant source, connects to the inlet 9 on the lower side of the ejector slider 5 via the inlet pipe 17, travels up along the coolant inlet channel 7 inside the ejector slider 5 to the first connection port 10, and then flows into the inlet section 14 of the cooling connection channel 13 inside the molding insert 3. After passing through the meandering section 16 near the upper end face of the molding insert 3 to fully absorb the heat of the molding area, it returns to the second connection port 12 of the ejector slider 5 via the outlet section 15. Subsequently, it flows down along the coolant outlet channel 8 and is discharged from the outlet 11 on the lower side of the ejector slider 5. Finally, it flows back to the coolant recovery device through the outlet pipe 18, completing the entire circulation process and achieving efficient cooling of the molding area.

[0052] In this embodiment of the present invention, the lower mold base 1 is provided with relief grooves 19 at the positions corresponding to the liquid inlet pipe 17 and the liquid outlet pipe 18, respectively. The width of the relief grooves 19 is greater than the outer diameter of the liquid inlet pipe 17 or the liquid outlet pipe 18, and the depth is not less than the maximum stroke of the molding insert 3.

[0053] During the operation of the injection mold, the molding insert 3 is driven by the ejector assembly to perform a linear reciprocating motion along the inner wall of the lower mold core 2 receiving area. The cooling channel in the ejector slider 5 connected to the molding insert 3 is connected to an external coolant source and recovery device through the inlet pipe 17 and the outlet pipe 18. Since the inlet pipe 17 and the outlet pipe 18 need to move synchronously with the molding insert 3, a clearance groove 19 is opened at the corresponding position of the lower mold base 1. The width of the clearance groove 19 is greater than the outer diameter of the pipe to ensure that the pipe has sufficient room to move during the movement and to avoid interference with the lower mold base 1; the depth is not less than the maximum stroke of the molding insert 3 to ensure that the pipe can move freely within the clearance groove 19 throughout the entire range of motion of the molding insert 3, so that the coolant circulation channel always remains connected and is not affected by the movement of the molding insert 3.

[0054] In this embodiment of the present invention, the outer peripheral wall of the molded insert 3 includes three positioning and mating parts arranged from top to bottom, including a first annular positioning step 20, a second annular positioning step 21, and a third positioning and mating part 22.

[0055] The first annular positioning step 20 is located at the upper part of the molded insert 3, the second annular positioning step 21 is located at the middle part of the molded insert 3, and its outer diameter is smaller than the outer diameter of the first annular positioning step 20. The third positioning mating part 22 is located at the lower part of the molded insert 3, and its outer diameter is smaller than the outer diameter of the second annular positioning step 21. The lower end face of the third positioning mating part 22 is connected to the ejector slider 5.

[0056] The inner wall of the accommodating area of ​​the lower mold core 2 is provided with a first annular positioning groove 23 that is adapted to the first annular positioning step 20, a second annular positioning groove 24 that is adapted to the second annular positioning step 21, and a third positioning groove 25 that is adapted to the third positioning mating part 22.

[0057] The first annular positioning step 20 and the second annular positioning step 21 are connected by a first arc-shaped transition surface;

[0058] The second annular positioning step 21 and the third positioning mating part 22 are connected by a second arc-shaped transition surface.

[0059] In the injection mold, the molding insert 3 needs to reciprocate linearly along the inner wall of the lower mold core 2 under the drive of the ejector assembly. To ensure motion accuracy and stability, a three-level positioning and mating structure is set on the outer peripheral wall of the molding insert 3. The first annular positioning step 20 is located at the upper part of the molding insert 3 and is adapted to the first annular positioning groove 23 in the inner wall of the lower mold core 2; the second annular positioning step 21 is located in the middle and its outer diameter is smaller than that of the upper step, and it is mated with the corresponding second annular positioning groove 24; the third positioning mating part 22 is located at the lower part and has the smallest outer diameter, and it is adapted to the third positioning groove 25. This stepped outer diameter decreasing design allows the molding insert 3 to obtain precise guidance at different height positions, and at the same time, the stress is distributed through three-level positioning, reducing the wear of a single positioning structure. The arc transition surface between adjacent positioning steps (the first arc transition surface and the second arc transition surface) avoids stress concentration through smooth transition and improves structural strength. When the molding insert 3 moves, the three-level positioning structure synchronously forms a sliding fit with the corresponding groove of the lower mold core 2 to ensure the straightness and stability of the movement trajectory. At the same time, the arc transition surface reduces the movement resistance and reduces the risk of cracking caused by corner stress.

[0060] Among them, the definition of an annular groove is broadly referred to as an annular groove / annular positioning step, which mainly emphasizes its characteristic of continuous circumferential closure around the component. It is used for positioning, sealing and other functions. It is similar to a circular annular groove in function, both of which can provide circumferential uniform constraint or effect.

[0061] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An injection mold integrating ejection, molding, and cooling functions, characterized in that, include: Lower mold base; The lower mold core is fixed to the lower mold base and has an upwardly opening receiving area; A molding insert, which is slidably fitted into the receiving area of ​​the lower mold core, and the upper end face of the molding insert constitutes the cavity surface of the molded product; An ejection assembly is disposed below the lower mold base and includes an ejection slider connected to the lower end face of the molding insert and an ejector plate connected to the lower end face of the ejection slider. The ejector plate is driven by a driving mechanism to perform linear reciprocating motion, thereby driving the molding insert to perform linear reciprocating motion along the inner wall of the receiving area of ​​the lower mold core. The cooling water system includes cooling channels disposed within the molded insert and the ejector slider for circulating coolant.

2. The injection mold integrating ejection, molding, and cooling functions according to claim 1, characterized in that, The cooling channel includes: A coolant inlet channel and a coolant outlet channel are provided inside the ejector slider. One end of the coolant inlet channel extends to the lower side of the ejector slider to form an inlet, and the other end extends to the upper surface to form a first connection port. One end of the coolant outlet channel extends to the lower side of the ejector slider to form an outlet, and the other end extends to the upper surface to form a second connection port. A cooling connection channel is provided inside the molded insert. The cooling connection channel includes an inlet section that is sealed and communicates with the first connection port, an outlet section that is sealed and communicates with the second connection port, and a detour section that connects the inlet section and the outlet section and is located near the upper end face of the molded insert.

3. The injection mold integrating ejection, molding, and cooling functions according to claim 2, characterized in that, The cooling water system also includes an inlet pipe and an outlet pipe; One end of the liquid inlet pipe is sealed and connected to the water inlet on the side of the lower end of the ejector slider, and the other end is connected to a coolant source to introduce coolant into the coolant inlet channel. One end of the liquid outlet pipe is sealed and connected to the water outlet on the lower side of the ejector slider, and the other end is connected to a coolant recovery device to discharge the coolant out of the coolant outlet channel.

4. The injection mold integrating ejection, molding, and cooling functions according to claim 2, characterized in that, The lower mold base is provided with relief grooves corresponding to the positions of the liquid inlet pipe and the liquid outlet pipe. The width of the relief groove is greater than the outer diameter of the liquid inlet pipe or the liquid outlet pipe, and the depth is not less than the maximum stroke of the molding insert.

5. The injection mold integrating ejection, molding, and cooling functions according to claim 1, characterized in that, The outer peripheral wall of the molded insert includes three positioning and mating parts arranged from top to bottom, including a first annular positioning step, a second annular positioning step, and a third positioning and mating part; The first annular positioning step is located at the upper part of the molded insert, the second annular positioning step is located at the middle part of the molded insert, and its outer diameter is smaller than the outer diameter of the first annular positioning step. The third positioning mating part is located at the lower part of the molded insert, and its outer diameter is smaller than the outer diameter of the second annular positioning step. The lower end face of the third positioning mating part is connected to the ejector slider. The inner wall of the accommodating area of ​​the lower mold core is provided with a first annular positioning groove adapted to the first annular positioning step, a second annular positioning groove adapted to the second annular positioning step, and a third positioning groove adapted to the third positioning mating part.

6. The injection mold integrating ejection, molding, and cooling functions according to claim 5, characterized in that, The first annular positioning step and the second annular positioning step are connected by a first arc-shaped transition surface; The second annular positioning step and the third positioning mating part are connected by a second arc-shaped transition surface.

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