Exhaust mechanism of sound equipment shell material mold

Abstract

The utility model discloses an exhaust mechanism of a sound equipment shell material mould, a bottom exhaust mechanism is arranged at the bottom of a mould cavity of a lower mould, a side exhaust mechanism is arranged on the side wall of the mould cavity, the side exhaust mechanism comprises an exhaust passage, an air valve core, a spring, a valve rod, a limiting cylinder and an exhaust plug, the exhaust passage is arranged on the side wall of the mould cavity and penetrates through the side wall, and the air valve core is arranged on the air valve core. A valve plug cavity is formed in the front section of the exhaust passage, an air valve element matched with the valve plug cavity is arranged in the valve plug cavity, an exhaust port communicated with the die cavity is formed in the valve plug cavity, a valve plug opening is formed in the rear section of the exhaust passage, an exhaust plug is arranged in the valve plug opening, the limiting barrel is coaxially arranged in the middle section of the exhaust passage, and the spring is arranged between the air valve element and the limiting barrel. The other end of the valve rod penetrates through the limiting cylinder and the spring to be connected with the air valve element. According to the utility model, the problem of poor exhaust effect caused by easy blockage of exhaust gaps of the existing exhaust mechanism is effectively solved, the exhaust and injection molding quality of the mold is improved, and the defective rate of products is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of acoustic shell material moulds, in particular to an exhaust mechanism of an acoustic shell material mould. Background Art

[0002] The exhaust structure of the injection mold is used to remove the air in the cavity and the various gases generated by the plastic during the heating process. On the one hand, it is to avoid various defects such as burns on the surface of the product and weld marks; on the other hand, it is to solve the problem that the back pressure generated by the compression of the gas in the injection mold cavity will reduce the filling speed and affect the injection cycle and product quality.

[0003] The conventional venting method for existing injection molds is to set an exhaust insert or an exhaust needle structure on the injection mold. However, during use, it is found that after long-term use, the exhaust gap will be blocked and difficult to clean, which not only affects the exhaust effect, but also affects the quality of the product; it is not conducive to improving the production and processing quality and efficiency of injection molded parts.

[0004] Therefore, developing an exhaust mechanism with good exhaust effect is the key to solving the problem. Utility Model Content

[0005] The utility model provides an exhaust mechanism for an acoustic shell material mould.

[0006] The utility model is realized by the following technical scheme: it comprises a lower mold, a mold cavity is provided on the lower mold, a bottom exhaust mechanism is provided at the bottom of the mold cavity, and side exhaust mechanisms are respectively provided on any two opposite side walls of the mold cavity, the side exhaust mechanism comprises an exhaust passage, an air valve core, a spring, a valve stem, a limiting cylinder, and an exhaust plug, the exhaust passage is provided on the side wall of the mold cavity and passes through the side wall, a valve plug cavity with a conical structure is provided at the front section of the exhaust passage, an air valve core with a conical structure which matches the shape of the valve plug cavity is provided in the valve plug cavity, an exhaust port with a convex structure which is connected to the mold cavity is provided at the tip of the valve plug cavity, a plurality of air guide passages which are connected to the valve plug cavity are provided at the inner end edge of the exhaust port, a valve plug port with a convex structure is provided at the rear section of the exhaust passage, an exhaust plug is provided in the valve plug port, the limiting cylinder is coaxially provided in the middle section of the exhaust passage, the spring is provided between the air valve core and the limiting cylinder, one end of the valve stem is connected to the exhaust plug, and the other end passes through the limiting cylinder and the spring to connect to the air valve core.

[0007] Furthermore, the inner end face of the exhaust plug is axially provided with at least two exhaust branch holes, and a vertical exhaust pipe connected to the exhaust branch hole is provided on the side wall of the exhaust plug. The exhaust branch hole and the exhaust pipe are connected in a π-shaped structure, and a gap is provided between the exhaust plug and the valve plug mouth to ensure that there is sufficient space to discharge the gas in the exhaust pipe.

[0008] Furthermore, the bottom exhaust mechanism includes an exhaust duct, an air valve core, a spring, a valve stem, and a limiting cylinder. The exhaust duct is arranged at the bottom of the mold cavity and passes through the bottom. A valve plug cavity with a conical structure is arranged at the upper part of the exhaust duct. An air valve core with a conical structure matching its shape is arranged in the valve plug cavity. The tip of the valve plug cavity is provided with an exhaust port in a convex shape connected to the mold cavity. A plurality of air guide ducts connected to the valve plug cavity are arranged at the inner end edge of the exhaust port. The limiting cylinder is coaxially arranged in the middle and lower part of the exhaust duct, the spring is arranged between the air valve core and the limiting cylinder, one end of the valve stem is connected to the exhaust plug, and the other end passes through the spring and extends to the upper part of the limiting cylinder.

[0009] The beneficial effects of the utility model are as follows: 1. The utility model has a compact structure and is easy to use and operate. Through the cooperation of the side exhaust mechanism and the bottom exhaust mechanism, the problem that the exhaust gap of the existing exhaust mechanism is easily blocked and difficult to clean, resulting in poor exhaust effect, is effectively overcome; by setting the side exhaust mechanism to connect the cavity with the outside world, the air flow inside the cavity can be discharged in time and quickly, avoiding the occurrence of air traps, solving the interference of the air pressure inside the cavity on the injection quality of the material, thereby maximizing the quality of mold exhaust and injection molding, and greatly reducing the defective rate of the product;

[0010] 2. By setting up a bottom exhaust mechanism to connect the cavity with the outside world, compressed gas is blown into the cavity when the product is demolded and ejected, so as to solve the problem of negative pressure cavity between the product and the inner wall of the mold causing demolding difficulties, facilitate rapid demolding and ejection of the product, and improve demolding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 is a structural schematic diagram of the bottom exhaust mechanism;

[0013] Figure 3 is a structural schematic diagram of the side exhaust mechanism;

[0014] Figure 4 for Figure 3 A is a schematic diagram of the enlarged structure of the middle part;

[0015] Figure 5 for Figure 3 A schematic diagram of the right side structure of the middle exhaust port;

[0016] Figure 6 It is a structural schematic diagram of the lower mold;

[0017] Numbers in the figure: 1 ~ lower mold, 2 ~ mold cavity, 3 ~ bottom exhaust mechanism, 4 ~ side exhaust mechanism, 5 ~ exhaust duct, 6 ~ valve plug cavity, 7 ~ exhaust port, 8 ~ air guide duct, 9 ~ valve plug port, 10 ~ air valve core, 11 ~ spring, 12 ~ valve stem, 13 ~ limit cylinder, 14 ~ exhaust plug, 15 ~ exhaust branch hole, 16 ~ air outlet pipe, 17 ~ push plate, 18 ~ adapter, 19 ~ air guide counterbore. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the utility model, its specific implementation method is described in detail below with reference to the accompanying drawings.

[0019] like Figures 1 to 6 The exhaust mechanism of the acoustic shell material mold shown in the figure comprises a lower mold 1, a mold cavity 2 is provided on the lower mold 1, a bottom exhaust mechanism 3 is provided at the bottom of the mold cavity 2, and a side exhaust mechanism 4 is respectively provided on any two opposite side walls of the mold cavity 2, and the side exhaust mechanism 4 comprises an exhaust duct 5, an air valve core 10, a spring 11, a valve stem 12, a limit cylinder 13, and an exhaust plug 14. The exhaust duct 5 is provided on the side wall of the mold cavity 2 and penetrates the side wall. The front section of the exhaust duct 5 is provided with a valve plug cavity 6 with a conical structure, and a conical air plug cavity 6 is provided with a shape-matching air plug 10. A valve core 10, the tip of the valve plug cavity 6 is provided with an exhaust port 7 in a convex shape which is connected to the mold cavity 2, a plurality of air guide channels 8 which are connected to the valve plug cavity 6 are provided at the inner end edge of the exhaust port 7, a valve plug port 9 in a convex shape is provided at the rear section of the exhaust channel 5, an exhaust plug 14 is provided in the valve plug port 9, the limiting cylinder 13 is coaxially arranged in the middle section of the exhaust channel 5, the spring 11 is arranged between the air valve core 10 and the limiting cylinder 13, one end of the valve stem 12 is connected to the exhaust plug 14, and the other end passes through the limiting cylinder 13 and the spring 11 to connect to the air valve core 10.

[0020] The inner end surface of the exhaust plug 14 is axially provided with at least two exhaust branch holes 15, and a vertical exhaust pipe 16 connected to the exhaust branch hole 15 is provided on the side wall of the exhaust plug 14. The exhaust branch hole 15 and the exhaust pipe 16 are connected to form a π-shaped structure, and a gap is set between the exhaust plug 14 and the valve plug port 9 to ensure that there is enough space to discharge the gas in the exhaust pipe 16.

[0021] The inner end surface of the exhaust plug 14 is provided with an air guide countersunk hole 19, which is connected to each exhaust branch hole 15. When the exhaust plug 14 is retracted into the exhaust port 7 and the push plate 17 closes the exhaust port 7, it can ensure that each exhaust branch hole 15 on the exhaust plug 14 is connected to the air duct 8 and the gas in the air duct 8 is discharged.

[0022] The bottom exhaust mechanism 3 includes an exhaust duct 5, an air valve core 10, a spring 11, a valve stem 12, and a limiting cylinder 13. The exhaust duct 5 is arranged at the bottom of the mold cavity 2 and passes through the bottom. A valve plug cavity 6 with a conical structure is provided at the upper part of the exhaust duct 5. An air valve core 10 with a conical structure matching its shape is provided in the valve plug cavity 6. The tip of the valve plug cavity 6 is provided with an exhaust port 7 with a convex structure connected to the mold cavity 2. A plurality of air guide channels 8 connected to the valve plug cavity 6 are provided at the inner end edge of the exhaust port 7. The limiting cylinder 13 is coaxially arranged in the middle and lower part of the exhaust duct 5. The spring 11 is arranged between the air valve core 10 and the limiting cylinder 13. One end of the valve stem 12 is connected to the exhaust plug 14, and the other end passes through the spring 11 and extends to the upper part of the limiting cylinder 13.

[0023] The tip of the air valve core 10 passes through the valve plug cavity 6 , and the exhaust port 7 is connected to the push plate 17 , and the push plate 17 is matched with the outer end shape of the exhaust port 7 .

[0024] When the push plate 17 is not subjected to force, the spring 11 pushes the tip of the air valve core 10 into the exhaust port 7, and then pushes the push plate 17 out of the exhaust port 7 into the mold cavity 2, so that the mold cavity 2 is connected to the air duct 8 to ensure that the gas can enter the air duct 8.

[0025] The limiting cylinder 13 is connected to the exhaust passage 5 by threaded connection.

[0026] There are at least three air ducts 8 , and the angle β between the air duct 8 and the inner end of the exhaust port 7 is 15 to 45 degrees. The air duct 8 ensures that when the push plate 17 returns to the exhaust port 7 , the remaining residual gas can enter the exhaust duct 5 and be discharged.

[0027] The lower part of the limiting cylinder 13 passes through the bottom of the mold cavity 2 to form an adapter 18, and the adapter 18 is connected to the air pump through an air pipe.

[0028] The working mode of the utility model is as follows: during injection molding, the material enters the mold cavity 2 of the lower mold 1 through the injection port of the upper mold, and the gas in the mold cavity 2 is squeezed by the material and discharged from the bottom exhaust mechanism 3 and the side exhaust mechanism 4;

[0029] 1. When the material covers the bottom surface of the mold cavity 2, the push plate 17 of the bottom exhaust mechanism 3 is pressed back into the exhaust port 7. At this time, the push plate 17 is flush with the bottom surface of the mold cavity 2, thereby avoiding the problem of weld marks on the product;

[0030] 2. As the amount of material in the cavity 2 increases, the gas is discharged from the side exhaust mechanism 4. When the material contacts the push plate 17 of the side exhaust mechanism 4, it gradually pushes the push plate 17. The push plate 17 is gradually retreated to the exhaust port 7 under pressure, and finally the push plate 17 is flush with the side wall of the cavity 2. The gas in the cavity 2 is discharged, thereby avoiding the problem of weld marks on the product and the interference of the internal air pressure of the cavity on the injection amount of the material, ensuring that a sufficient amount of material is injected into the cavity;

[0031] 3. When the injection molding is completed, open the upper mold, start the air pump to deliver compressed gas to the bottom exhaust mechanism 3 through the air pipe, and the compressed gas is blown into the mold cavity 2 from the exhaust port 7 to eliminate the negative pressure between the product and the bottom surface of the mold cavity 2 to facilitate demolding.

Claims

1. An exhaust mechanism for an acoustic shell material mold, comprising a lower mold (1), wherein the lower mold (1) is provided with a mold cavity (2), characterized in that: A bottom exhaust mechanism (3) is arranged at the bottom of the mold cavity (2), and a side exhaust mechanism (4) is respectively arranged on any two opposite side walls of the mold cavity (2), wherein the side exhaust mechanism (4) comprises an exhaust passage (5), an air valve core (10), a spring (11), a valve stem (12), a limiting cylinder (13), and an exhaust plug (14); the exhaust passage (5) is arranged on the side wall of the mold cavity (2) and penetrates the side wall; a valve plug cavity (6) with a conical structure is arranged at the front section of the exhaust passage (5); an air valve core (10) with a conical structure and matching its shape is arranged in the valve plug cavity (6); and a connecting member (14) is arranged at the tip of the valve plug cavity (6). An exhaust port (7) having a convex-shaped structure passing through the mold cavity (2) is provided at the inner end edge of the exhaust port (7) with a plurality of air guide channels (8) connected to the valve plug cavity (6). A valve plug port (9) having a convex-shaped structure is provided at the rear section of the exhaust channel (5). An exhaust plug (14) is provided in the valve plug port (9). The limiting cylinder (13) is coaxially arranged in the middle section of the exhaust channel (5). The spring (11) is arranged between the air valve core (10) and the limiting cylinder (13). One end of the valve stem (12) is connected to the exhaust plug (14), and the other end passes through the limiting cylinder (13) and the spring (11) to be connected to the air valve core (10).

2. The exhaust mechanism of the acoustic shell mold according to claim 1 is characterized in that: The inner end surface of the exhaust plug (14) is axially provided with at least two exhaust branch holes (15), and a vertical exhaust pipe (16) connected to the exhaust branch hole (15) is provided on the side wall of the exhaust plug (14). The exhaust branch hole (15) and the exhaust pipe (16) are connected and combined to form a π-shaped structure, and a gap is provided between the exhaust plug (14) and the valve plug port (9).

3. The exhaust mechanism of the acoustic shell mold according to claim 1 is characterized in that: The bottom exhaust mechanism (3) comprises an exhaust passage (5), an air valve core (10), a spring (11), a valve stem (12), and a stopper (13). The exhaust passage (5) is arranged at the bottom of the mold cavity (2) and passes through the bottom. A valve plug cavity (6) with a conical structure is arranged at the upper part of the exhaust passage (5). The air valve core (10) with a conical structure and matching its shape is arranged in the valve plug cavity (6). The tip of the valve plug cavity (6) is provided with a valve stem (12) connected to the mold cavity (2). ) is an exhaust port (7) in a convex-shaped structure, a plurality of air guide channels (8) connected to the valve plug cavity (6) are arranged at the inner end edge of the exhaust port (7), the limiting cylinder (13) is coaxially arranged at the middle and lower part of the exhaust channel (5), the spring (11) is arranged between the air valve core (10) and the limiting cylinder (13), one end of the valve stem (12) is connected to the exhaust plug (14), and the other end passes through the spring (11) and extends to the upper part of the limiting cylinder (13).

4. The exhaust mechanism of the acoustic shell mold according to claim 1 or 3, characterized in that: The tip of the air valve core (10) passes through the valve plug cavity (6), the exhaust port (7) is connected to the push plate (17), and the push plate (17) and the outer end of the exhaust port (7) are matched in shape.

5. The exhaust mechanism of the acoustic shell mold according to claim 1 or 3, characterized in that: The limiting cylinder (13) is threadably connected to the exhaust passage (5).

6. The exhaust mechanism of the acoustic shell mold according to claim 1 or 3, characterized in that: At least three air guide channels (8) are provided, and the included angle β between the air guide channels (8) and the inner end of the exhaust port (7) is 15 to 45 degrees.

7. The exhaust mechanism of the acoustic shell mold according to claim 3 is characterized in that: The lower part of the limiting cylinder (13) passes through the bottom of the mold cavity (2) and is connected to the adapter (18), and the adapter (18) is connected to the air pump through an air pipe.

8. The exhaust mechanism of the acoustic shell mold according to claim 1 or 2, characterized in that: The inner end surface of the exhaust plug (14) is provided with an air guide countersunk hole (19), and the air guide countersunk hole (19) is connected to each exhaust branch hole (15), so as to ensure that when the push plate (17) closes the exhaust port (7), each exhaust branch hole (15) on the exhaust plug (14) is connected to the air guide channel (8), and the gas in the air guide channel (8) is discharged.

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