Improved injection mold

Abstract

The utility model discloses an improved injection mold, including the snap of upper die and lower die, the snap of upper die and lower die forms a plurality of cavities, and the bottom surface of lower die is provided with the installation groove, and the top wall of installation groove is provided with the axle hole that penetrates to the cavity, and installation groove is provided with the combined insert, and the combined insert includes the water transport insert, the forming insert and the thimble, and the water transport insert that is provided with the central hole along its axial direction is embedded in the installation groove, and the lower part of forming insert is embedded in the central hole of water transport insert, and the upper part of forming insert extends to the cavity, and the upper part of thimble extends to the cavity through forming insert, and the outer circumferential surface of water transport insert is provided with the first water transport cavity and the second water transport cavity that are oppositely arranged and are communicated, and the first water transport cavity is connected with the water inlet pipe, and the second water transport cavity is connected with the water outlet pipe. The utility model discloses through setting up water transport insert and forming insert, makes cooling and ejection process not interfere with each other, thereby can reduce product problem and improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold technology, specifically to an improved injection mold. Background Technology

[0002] In the plastic mold industry, some products, due to structural limitations, cannot have cooling water channels installed in corresponding parts of the mold, especially in the insert area of ​​the rear mold section. This is because this area has many ejector pins, which often conflict with the cooling water channels. Therefore, to ensure smooth demolding, the cooling water or ejector pin structures in the insert area of ​​the rear mold section are usually omitted. However, this ultimately leads to various defects in the produced products. For example, the lack of cooling water leads to high mold temperatures, resulting in longer production cycles, lower production efficiency, product deformation, and dimensional defects. Alternatively, the lack of ejector pins in the insert area of ​​the rear mold section can cause defects such as sticking to the mold and whitening. Redesigning the mold's cooling channels would increase production costs. Utility Model Content

[0003] The purpose of this utility model is to provide an improved injection mold that combines cooling and ejection functions, with the cooling and ejection processes not interfering with each other, thereby reducing product problems and improving production efficiency. This solves the problems mentioned in the background art, such as the lack of cooling water or ejector pin structures in corresponding parts of existing molds, which leads to longer production cycles and products prone to defects.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An improved injection mold includes an upper mold core and a lower mold core that are snapped together. The snapping surfaces of the upper mold core and the lower mold core form a plurality of cavities. The bottom surface of the lower mold core has an installation groove. The top wall of the installation groove has a shaft hole that extends through to the cavity. The installation groove is provided with a combined insert. The combined insert includes a water-cooling insert, a molding insert, and an ejector pin. The water-cooling insert, which has a central hole along its axial direction, is embedded in the installation groove. The lower part of the molding insert is embedded in the central hole of the water-cooling insert. The upper part of the molding insert extends upward to the cavity. The upper part of the ejector pin extends upward through the molding insert to the cavity. The outer peripheral surface of the water-cooling insert has a first water-cooling cavity and a second water-cooling cavity that are oppositely arranged and connected. The first water-cooling cavity is connected to a water inlet pipe, and the second water-cooling cavity is connected to a water outlet pipe.

[0006] Preferably, both the first water-carrying cavity and the second water-carrying cavity have a semi-annular structure, and the first water-carrying cavity and the second water-carrying cavity respectively form a water-carrying channel for cooling water to pass through between them and the inner wall of the mounting groove.

[0007] Preferably, the outer peripheral surface of the water-carrying insert is provided with a water-blocking portion for separating the first water-carrying cavity and the second water-carrying cavity.

[0008] Preferably, both the water-carrying insert and the molded insert are cylindrical. The lower outer circumferential surface of the water-carrying insert is provided with an annular first sealing groove, and a first sealing ring is embedded in the first sealing groove. The first sealing ring is located below the first water-carrying cavity.

[0009] Preferably, the top surface of the water-carrying insert has an annular second sealing groove, and a second sealing ring is embedded in the second sealing groove.

[0010] Preferably, the outer peripheral surface of the molded insert has an annular third water-carrying cavity.

[0011] Preferably, the inner wall of the first water-carrying cavity is provided with a plurality of water inlet holes communicating with the third water-carrying cavity, and the inner wall of the second water-carrying cavity is provided with a plurality of water outlet holes communicating with the third water-carrying cavity.

[0012] Preferably, the outer peripheral surface of the molded insert is provided with a third sealing groove located above and below the third water channel, and a third sealing ring is embedded in the third sealing groove.

[0013] Preferably, it includes a top plate, an upper template, a lower template, and a base plate connected in sequence, with the upper mold core embedded on the bottom surface of the upper template and the lower mold core embedded on the top surface of the lower template.

[0014] Preferably, a movable space is formed between the base plate and the lower mold core, and a fixed plate and an ejector plate connected to each other are movably arranged in the movable space. The bottom end of the ejector pin passes downward through the lower mold plate and connects with the ejector plate in the movable space.

[0015] Compared with the prior art, the beneficial effects of this utility model are: there is no need to redesign a new mold or change the direction of the water inlet and outlet pipes. By simply setting water-transporting inserts, the lower mold core can be used for both cooling and product ejection. The ejection process of the ejector pins does not interfere with the cooling process of the water inlet and outlet pipes, which can ensure that the product is fully cooled, thereby reducing product defects, shortening the production cycle, and improving production efficiency. Attached Figure Description

[0016] Figure 1 This is a perspective view of an improved injection mold according to the present invention;

[0017] Figure 2 This is a front view of an improved injection mold according to the present invention;

[0018] Figure 3 This utility model Figure 2 Sectional view of section AA;

[0019] Figure 4 This is an enlarged view of a partial structure of an improved injection mold according to this utility model;

[0020] Figure 5 This is a perspective view of the water-carrying inlay of this utility model;

[0021] Figure 6 This is a perspective view of the molded insert of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Upper mold core; 2. Lower mold core; 21. Mounting groove; 22. Shaft hole; 3. Cavity; 4. Assembly insert; 41. Water channel insert; 411. Center hole; 412. First water channel cavity; 413. Second water channel cavity; 414. First sealing ring; 415. Second sealing ring; 416. Water baffle; 417. Water inlet hole; 418. Water outlet hole; 42. Molding insert; 421. Third water channel cavity; 422. Third sealing ring; 43. Ejector pin; 5. Water inlet pipe; 6. Water outlet pipe; 7. Top plate; 8. Upper mold plate; 9. Lower mold plate; 10. Seat plate; 11. Fixing plate; 12. Ejector pin plate. Detailed Implementation

[0023] 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.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "more than" means two or more, unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "joined," and "fixed," etc., should be interpreted broadly.

[0025] Please see Figure 1-4An improved injection mold includes an upper mold core 1 and a lower mold core 2 that are interlocked. The interlocking surfaces of the upper mold core 1 and the lower mold core 2 form a plurality of cavities 3. A product is injection molded into the cavity 3. The bottom surface of the lower mold core 2 has an installation groove 21, and the top wall of the installation groove 21 has a shaft hole 22 that extends through to the cavity 3. The installation groove 21 is provided with a combined insert 4, which includes a water-cooling insert 41, a molding insert 42, and an ejector pin 43. The water-cooling insert 41, which has a central hole 411 along its axial direction, is embedded in the installation groove 21. The lower part of the molding insert 42 is embedded in the central hole 411 of the water-cooling insert 41, and the upper part of the molding insert 42 extends upward to the cavity 3. The upper part of the ejector pin 43 extends upward through the molding insert 42 to the cavity 3. The outer peripheral surface of the water-carrying insert 41 is provided with a first water-carrying cavity 412 and a second water-carrying cavity 413 that are arranged opposite to each other and connected. The first water-carrying cavity 412 is connected to a water inlet pipe 5, and the second water-carrying cavity 413 is connected to a water outlet pipe 6. Both the water inlet pipe 5 and the water outlet pipe 6 are located inside the lower mold core 2.

[0026] During the molding process of the product, the molding insert 42 cooperates with the cavity 3 to form the product. Cooling water enters the first water channel 412 through the water inlet pipe 5, enters the second water channel 413 through the first water channel 412, and finally flows out from the water outlet pipe 6. During this process, the cooling water in the water inlet pipe 5 and the water outlet pipe 6 cools the lower mold core 2, and the cooling water in the first water channel 412 and the second water channel 413 cools the water channel insert 41. After cooling is completed, the mold is opened first, and then the product is ejected from the lower mold core 2 upward through the ejector pin 43.

[0027] Therefore, this utility model does not require redesigning a new mold or changing the routing of the water inlet pipe 5 and the water outlet pipe 6. By simply setting the water-transporting insert 41, the lower mold core 2 can be used for both cooling and product ejection. The ejection process of the ejector pin 43 does not interfere with the cooling process of the water inlet pipe 5 and the water outlet pipe 6, which can ensure that the product is fully cooled, thereby reducing product defects, shortening the production cycle, and improving production efficiency.

[0028] Please see Figure 4-5 In this embodiment, both the water-transporting insert 41 and the molded insert 42 are cylindrical. The lower outer circumferential surface of the water-transporting insert 41 is provided with an annular first sealing groove, and a first sealing ring 414 is embedded in the first sealing groove. The first sealing ring 414 is located below the first water-transporting cavity 412. The top surface of the water-transporting insert 41 is provided with an annular second sealing groove, and a second sealing ring 415 is embedded in the second sealing groove. The first sealing ring 414 and the second sealing ring 415 are used to prevent the cooling water in the first water-transporting cavity 412 from leaking from the mounting groove 21.

[0029] Both the first water-carrying cavity 412 and the second water-carrying cavity 413 have a semi-annular structure, forming water-carrying channels for cooling water to pass through between the first water-carrying cavity 412 and the inner wall of the mounting groove 21. Please refer to [link / reference]. Figure 4-5 The outer peripheral surface of the water-carrying insert 41 is provided with a water-blocking portion 416 for separating the first water-carrying cavity 412 and the second water-carrying cavity 413; please refer to Figure 4 and Figure 6 The outer peripheral surface of the molded insert 42 is provided with an annular third water-carrying cavity 421. The inner wall of the first water-carrying cavity 412 is provided with a plurality of water inlet holes 417 communicating with the third water-carrying cavity 421. The inner wall of the second water-carrying cavity 413 is provided with a plurality of water outlet holes 418 communicating with the third water-carrying cavity 421.

[0030] Please see Figure 4 With the water-blocking part 416 in place, during cooling, the cooling water in the first water-carrying cavity 412 can only flow into the second water-carrying cavity 413 through the water inlet 417, the third water-carrying cavity 421, and the water outlet 418, and finally flow out from the water outlet pipe 6. The waterway distance is longer, resulting in a better cooling effect. During this process, the cooling water in the first water-carrying cavity 412 and the second water-carrying cavity 413 simultaneously cools the water-carrying insert 41 and the lower mold core 2, while the third water-carrying cavity 421 simultaneously cools the water-carrying insert 41 and the molding insert 42, thus accelerating the cooling rate and making the cooling more uniform.

[0031] Please see Figure 4 and Figure 6 The outer peripheral surface of the molded insert 42 is provided with a third sealing groove located above and below the third water channel 421. A third sealing ring 422 is embedded in the third sealing groove. The third sealing ring 422 is used to prevent the cooling water in the third water channel 421 from leaking into the central hole 411.

[0032] Please see Figure 1-3 The improved injection mold also includes a top plate 7, an upper mold plate 8, a lower mold plate 9, and a base plate 10 connected in sequence. The upper mold core 1 is embedded in the bottom surface of the upper mold plate 8, and the lower mold core 2 is embedded in the top surface of the lower mold plate 9. A movable space is formed between the base plate 10 and the lower mold core 2. A fixed plate 11 and an ejector plate 12 are movably arranged in the movable space and connected to each other. The bottom end of the ejector pin 43 passes downward through the lower mold plate 9 and connects to the ejector plate 12 in the movable space.

[0033] In this embodiment, after the product in the cavity 3 is formed and cooled, the top plate 7, the upper template 8 and the upper mold core 1 move upward to open the mold. Then the fixed plate 11 and the ejector plate 12 move upward, thereby driving the ejector pin 43 to push the product out upward.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An improved injection mold, comprising an upper mold core (1) and a lower mold core (2) that are snapped together, wherein the snapping surfaces of the upper mold core (1) and the lower mold core (2) form a plurality of cavities (3), characterized in that: The bottom surface of the lower mold core (2) is provided with a mounting groove (21), and the top wall of the mounting groove (21) is provided with a shaft hole (22) that extends to the cavity (3). The mounting groove (21) is provided with a combined insert (4), which includes a water-cooling insert (41), a forming insert (42), and an ejector pin (43). The water-cooling insert (41), which has a central hole (411) along its axial direction, is embedded in the mounting groove (21), and the lower part of the forming insert (42) is embedded in the water-cooling insert (411). Inside the center hole (411) of the water insert (41), the upper part of the molding insert (42) extends upward to the cavity (3), and the upper part of the ejector pin (43) extends upward through the molding insert (42) to the cavity (3). The outer peripheral surface of the water insert (41) is provided with a first water channel (412) and a second water channel (413) that are arranged opposite to each other and connected. The first water channel (412) is connected to a water inlet pipe (5), and the second water channel (413) is connected to a water outlet pipe (6).

2. The improved injection mold according to claim 1, characterized in that: The first water-carrying cavity (412) and the second water-carrying cavity (413) are both semi-annular structures, and the first water-carrying cavity (412) and the second water-carrying cavity (413) respectively form water-carrying channels for cooling water to pass through between the inner wall of the mounting groove (21).

3. The improved injection mold according to claim 2, characterized in that: The outer peripheral surface of the water-carrying insert (41) is provided with a water-blocking part (416) for separating the first water-carrying cavity (412) and the second water-carrying cavity (413).

4. The improved injection mold according to any one of claims 1-3, characterized in that: Both the water-carrying insert (41) and the molded insert (42) are cylindrical. The lower outer circumference of the water-carrying insert (41) is provided with an annular first sealing groove. The first sealing groove is embedded with a first sealing ring (414), which is located below the first water-carrying cavity (412).

5. The improved injection mold according to claim 4, characterized in that: The top surface of the water-carrying insert (41) is provided with an annular second sealing groove, and a second sealing ring (415) is embedded in the second sealing groove.

6. The improved injection mold according to any one of claims 1-3, characterized in that: The outer circumferential surface of the molded insert (42) is provided with an annular third water-carrying cavity (421).

7. The improved injection mold according to claim 6, characterized in that: The inner wall of the first water-carrying cavity (412) is provided with several water inlet holes (417) that communicate with the third water-carrying cavity (421), and the inner wall of the second water-carrying cavity (413) is provided with several water outlet holes (418) that communicate with the third water-carrying cavity (421).

8. The improved injection mold according to claim 6, characterized in that: The outer peripheral surface of the molded insert (42) is provided with a third sealing groove located above and below the third water channel (421), and a third sealing ring (422) is embedded in the third sealing groove.

9. The improved injection mold according to claim 1, characterized in that: It includes a top plate (7), an upper template (8), a lower template (9) and a base plate (10) connected in sequence. The upper mold core (1) is embedded in the bottom surface of the upper template (8) and the lower mold core (2) is embedded in the top surface of the lower template (9).

10. The improved injection mold according to claim 9, characterized in that: An active space is formed between the base plate (10) and the lower mold core (2). A fixed plate (11) and an ejector plate (12) connected to each other are movably arranged in the active space. The bottom end of the ejector (43) passes downward through the lower mold plate (9) and connects with the ejector plate (12) in the active space.

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