Exhaust device of injection mold

Abstract

The utility model relates to an exhaust device of an injection mold, which relates to the technical field of injection molds and comprises a support, an upper mold, a lower mold, an exhaust component and a locking component, the lower mold is arranged on the support, the upper mold is movably arranged on the lower mold, the locking component is arranged on the lower mold, and the exhaust component is arranged on the support. The exhaust assembly comprises a push block, a connecting rod, a moving plate, a first spring and an abutting plate, an exhaust hole and an assembling groove are formed in the upper mold, the push block is movably arranged on the upper mold through the exhaust hole, the connecting rod is arranged at the end, away from the lower mold, of the push block, and the moving plate is arranged at the end, away from the push block, of the connecting rod; the abutting plate is arranged on the upper die through the assembling groove, one end of the first spring abuts against the movable plate, and the other end of the first spring abuts against the abutting plate. According to the air exhausting assembly, the problem that melt enters the air exhausting hole is solved, it is ensured that air in the die is effectively exhausted, and therefore the product quality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to an injection mold exhaust device. Background Art

[0002] The injection mold exhaust device is a vital component in mold design. Its main function is to remove gas from the mold cavity to ensure the quality and production efficiency of plastic products. The types of exhaust devices include parting surface exhaust grooves, insert mating surface exhaust, push rod gap exhaust, breathable steel exhaust, vacuum exhaust, forced exhaust, etc., which are suitable for specific products and mold design requirements.

[0003] At present, a Chinese utility model patent application with a publication date of January 12, 2021 and a publication number of CN 212343159U provides an exhaust mechanism for a core injection molding chair mold, including a base, the upper left and upper right parts of the base are fixedly connected to support plates, the lower left end of the left support plate and the lower right end of the right support plate are fixedly connected to cooling devices, a top plate is fixedly connected between the upper ends of the two support plates, a moving device is movably connected through the middle of the upper end of the top plate, an upper mold is fixedly connected to the lower end of the moving device, a mold groove is provided in the middle of the upper end of the base, and an exhaust device is fixedly connected through the right front end of the lower mold. The exhaust mechanism for a core injection molding chair mold described in the utility model improves the production efficiency of the product by providing a cooling device and a moving device, and improves the production quality of the product by providing an exhaust device.

[0004] The injection mold exhaust device in the related art is equipped with a cooling component to accelerate the cooling speed of the molten material and increase the probability of the molten material entering the exhaust pipe and causing the exhaust hole to be blocked. After the molten material enters the exhaust hole, the exhaust channel is blocked, resulting in the inability to effectively discharge the gas in the mold cavity. In this case, the gas is compressed, forming a back pressure, which hinders the normal flow and filling of the molten plastic. Since the gas cannot be discharged in time, the molten plastic is difficult to completely fill the mold cavity, which may cause the product to be short of material or incompletely filled.

[0005] Therefore, it is necessary to provide an injection mold exhaust device to solve the above problems. Utility Model Content

[0006] An embodiment of the present application provides an injection mold exhaust device to improve the technical problem in the related art that after the molten material enters the exhaust hole, it is cooled and formed, thereby blocking the exhaust channel, resulting in the inability to effectively exhaust the gas in the mold cavity.

[0007] An embodiment of the present application provides an injection mold exhaust device, including a bracket, an upper mold, a lower mold, an exhaust component and a locking component, the lower mold is arranged on the bracket, the upper mold is movably arranged on the lower mold, an upper mold cavity is arranged inside the bottom end of the upper mold, and a lower mold cavity is arranged inside the top end of the lower mold, the locking component is arranged on the lower mold, the exhaust component includes a push block, a connecting rod, a movable plate, a first spring and an abutment plate, an exhaust hole and an assembly groove are opened on the upper mold, the push block is movably arranged on the upper mold through the exhaust hole, the connecting rod is arranged on one end of the push block away from the lower mold, the movable plate is arranged on one end of the connecting rod away from the push block, the abutment plate is arranged on the upper mold through the assembly groove, one end of the first spring abuts on the movable plate, and the other end of the first spring abuts on the abutment plate.

[0008] The above-mentioned technical scheme in the embodiment of the present application has at least the following technical effects: when the operator injects the product through the injection molding film, when the molten material enters the upper mold cavity and the lower mold cavity, the molten material compresses the air in the upper mold cavity and the lower mold cavity, and the pressure in the upper mold cavity and the lower mold cavity increases, so that the gas is discharged from the exhaust hole, and the gas first compresses the push block, and the push block presses the connecting rod, and the connecting rod drives the movable plate to move upward, and the movable plate compresses the first spring, thereby discharging the gas from the exhaust hole. When part of the molten material enters the exhaust hole, after the gas is discharged, the movable plate is pushed by the first spring, and the movable plate drives the connecting rod and the push block to press the molten material into the upper mold cavity.

[0009] The injection mold exhaust device provided in the embodiment of the present application can, through the exhaust component, help prevent gas accumulation in the mold and avoid the formation of bubbles and pores, thereby improving the surface quality and internal structural integrity of the product. Effective exhaust can reduce the resistance to melt flow and make the filling process smoother, thereby shortening the molding cycle and improving production efficiency. It can effectively solve the problem of molten material entering the exhaust hole and ensure that the gas in the mold is effectively discharged, thereby improving product quality, production efficiency, and extending the life of the mold.

[0010] In some embodiments, a heating block is disposed through the exhaust hole.

[0011] In some embodiments, an acceleration channel is opened on the upper mold.

[0012] In some embodiments, a diameter of the moving plate is smaller than a diameter of the mounting groove.

[0013] In some embodiments, the locking assembly includes a baffle, a rotating handle, a second spring, a push rod and a lock core. A limiting groove is provided on the lower mold, the baffle is arranged on the lower mold through the limiting groove, the push rod is movably arranged on the baffle, one end of the second spring abuts on the baffle, the other end of the second spring abuts on the push rod, the lock core is arranged on one end of the push rod close to the upper mold, and a lock core is provided on the upper mold.

[0014] In some embodiments, a positioning column is provided on the lower mold, a positioning groove is provided on the upper mold, and a through hole is provided on the upper mold.

[0015] In some embodiments, an injection port is provided on the bracket, a connecting hole is opened on the lower mold, and the injection port is connected to the lower mold cavity through the connecting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of the injection mold exhaust device provided in an embodiment of the present application;

[0017] Figure 2 A schematic diagram of the cross-sectional structure of the upper mold provided in an embodiment of the present application;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 A schematic cross-sectional structure diagram of a locking assembly provided in an embodiment of the present application;

[0020] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0021] Among them, the reference numerals in the figure are:

[0022] 1. Bracket; 2. Upper mold; 21. Upper mold cavity; 3. Lower mold; 31. Lower mold cavity; 4. Injection port; 5. Exhaust assembly; 51. Push block; 52. Connecting rod; 53. Moving plate; 54. Exhaust hole; 55. Assembly groove; 56. First spring; 57. Abutment plate; 58. Heating block; 59. Acceleration channel; 6. Locking assembly; 61. Baffle; 62. Turning handle; 63. Second spring; 64. Push rod; 65. Lock core; 66. Lock hole; 7. Positioning column; 71. Positioning groove; 72. Through hole. DETAILED DESCRIPTION

[0023] Based on this, in order to improve the technical problem in the related art that after the molten material enters the exhaust hole, the molten material is cooled and formed, thereby blocking the exhaust channel, resulting in the gas in the mold cavity cannot be effectively discharged, the embodiment of the present application provides the following solution.

[0024] Please also read Figures 1 to 3 An embodiment of the present application provides an injection mold exhaust device, which includes a bracket 1, an upper mold 2, a lower mold 3, an exhaust component 5 and a locking component 6. The lower mold 3 is arranged on the bracket 1, and the upper mold 2 is movably arranged on the lower mold 3. An upper mold cavity 21 is arranged inside the bottom end of the upper mold 2, and a lower mold cavity 31 is arranged inside the top end of the lower mold 3. The locking component 6 is arranged on the lower mold 3, and the exhaust component 5 is arranged on the upper mold 2.

[0025] In some embodiments, please refer to Figures 3 to 5 The exhaust assembly 5 includes a push block 51, a connecting rod 52, a movable plate 53, a first spring 56 and an abutment plate 57. An exhaust hole 54 and an assembly groove 55 are provided on the upper mold 2. A heating block 58 is provided through the exhaust hole 54. The push block 51 is movably arranged on the upper mold 2 through the exhaust hole 54. The connecting rod 52 is arranged on one end of the push block 51 away from the lower mold 3. The movable plate 53 is arranged on one end of the connecting rod 52 away from the push block 51. The diameter of the movable plate 53 is smaller than the diameter of the assembly groove 55. The abutment plate 57 is arranged on the upper mold 2 through the assembly groove 55. One end of the first spring 56 abuts on the movable plate 53, and the other end of the first spring 56 abuts on the abutment plate 57. An acceleration channel 59 is provided on the upper mold 2. An injection port 4 is provided on the bracket 1. A connecting hole is provided on the lower mold 3. The injection port 4 is connected to the lower mold cavity 31 through the connecting hole.

[0026] With such arrangement, when the operator injects the product through the injection molding film, when the molten material enters the upper mold cavity 21 and the lower mold cavity 31 through the injection port 4, the molten material compresses the air in the upper mold cavity 21 and the lower mold cavity 31, and the pressure in the upper mold cavity 21 and the lower mold cavity 31 increases, so that the gas is discharged from the exhaust hole 54, and the gas first compresses the push block 51, and the push block 51 presses the connecting rod 52, and the connecting rod 52 drives the movable plate 53 to move upward, and the movable plate 53 compresses the first spring 56, so that the gas is discharged from the exhaust hole 54, and the gas reaches the acceleration channel 59 through the assembly groove 55, and is quickly discharged from the acceleration channel 59. When the gas in the upper mold cavity 21 and the lower mold cavity 31 is exhausted, part of the molten material enters the exhaust hole 54, and the heating block 58 in the exhaust hole 54 heats the molten material to prevent the molten material from cooling and solidifying, and the first spring 56 pushes the movable plate 53, and the movable plate 53 drives the connecting rod 52 and the push block 51 to press the molten material into the upper mold cavity 21. When the molten material enters the exhaust hole 54, the heating block 58 in the exhaust hole 54 will heat it to prevent the molten material from cooling and solidifying. This design ensures that the exhaust hole 54 is always unobstructed, avoiding the blockage problem caused by the solidification of the molten material. Through effective exhaust, the molten material can fill the mold cavity more evenly, reducing the generation of surface defects such as bubbles and silver streaks. This is particularly important for precision parts and products with high appearance requirements. Due to the unobstructed exhaust hole 54, the molten material can fill the mold cavity more accurately, reducing the dimensional deviation and deformation caused by gas residue, thereby improving the dimensional accuracy of the product. Through the heating of the molten material by the heating block 58 and the timely removal of the push block 51, the molten material will not solidify in the exhaust hole 54, reducing the wear and corrosion of the mold, thereby extending the service life of the mold. This design provides more flexibility for mold design.

[0027] In some embodiments, please refer to Figures 3 to 5 The locking assembly 6 includes a baffle 61, a rotating handle 62, a second spring 63, a push rod 64 and a lock core 65. A limiting groove is provided on the lower mold 3, the baffle 61 is arranged on the lower mold 3 through the limiting groove, the push rod 64 is movably arranged on the baffle 61, one end of the second spring 63 abuts on the baffle 61, and the other end of the second spring 63 abuts on the push rod 64. The lock core 65 is arranged on one end of the push rod 64 close to the upper mold 2, the upper mold 2 is provided with a lock core 65, the lower mold 3 is provided with a positioning column 7, the upper mold 2 is provided with a positioning groove 71, and the upper mold 2 is provided with a through hole 72.

[0028] In this configuration, when the upper mold 2 and the lower mold 3 are aligned, the upper mold 2 and the lower mold 3 are connected together through the positioning column 7 and the positioning groove 71. The through hole 72 is used to exhaust the gas generated when the positioning column 7 is combined with the positioning groove 71. At the same time, the operator pushes the rotating handle 62 to compress the second spring 63 by the push rod 64, thereby pushing the lock core 65 on the push rod 64 into the lock hole 66, and rotating the rotating handle 62 to rotate the lock core 65 in the lock hole 66, thereby locking the upper mold 2 and the lower mold 3. The design of the positioning column 7 and the positioning groove 71 can ensure that the upper mold 2 and the lower mold 3 are accurately aligned when the mold is closed. This design can effectively avoid deviation of the mold during the mold closing process, thereby improving the dimensional accuracy and consistency of the product. By pushing the rotating handle 62, compressing the second spring 63 and pushing the lock core 65 into the lock hole 66, the lock core 65 rotates in the lock hole 66 after the handle 62 is turned, thereby locking the mold. This mechanical locking mechanism provides a strong locking force to ensure that the mold will not separate due to pressure during the injection process, thereby ensuring the quality of the product and the safety of the mold. This design allows for quick mold closing and locking, reducing operation time and improving production efficiency. The operator can complete mold closing and locking through simple operations, reducing the complicated adjustment process. This design provides precise mold alignment, effective exhaust, strong locking force, and a safe and reliable operation process through the combination of positioning columns 7 and positioning grooves 71, as well as the application of mechanical locking mechanisms. These advantages help improve product quality, production efficiency and the service life of the mold.

[0029] The implementation principle of an injection mold exhaust device in the embodiment of the present application is as follows: when the operator injects a product through the injection film, by aligning the upper mold 2 and the lower mold 3, the upper mold 2 and the lower mold 3 are connected together through the positioning column 7 and the positioning groove 71, and the through hole 72 is used to exhaust the gas generated when the positioning column 7 is combined with the positioning groove 71. At the same time, the operator pushes the rotating handle 62 to compress the second spring 63 on the pushing rod 64, thereby pushing the lock core 65 on the pushing rod 64 into the lock hole 66, and rotating the rotating handle 62 to rotate the lock core 65 in the lock hole 66, thereby locking the upper mold 2 and the lower mold 3, and starting the injection molding operation. When the molten material enters the upper mold cavity 21 and the lower mold cavity 31 through the injection port 4, the molten material is compressed in the upper mold cavity 21 to The air in the upper mold cavity 21 and the lower mold cavity 31 increases, and the pressure in the upper mold cavity 21 and the lower mold cavity 31 increases, so that the gas is discharged from the exhaust hole 54, and the gas first compresses the push block 51, and the push block 51 presses the connecting rod 52, and the connecting rod 52 drives the movable plate 53 to move upward, and the movable plate 53 compresses the first spring 56, so that the gas is discharged from the exhaust hole 54, and the gas reaches the acceleration channel 59 through the assembly groove 55, and is quickly discharged from the acceleration channel 59. When the gas in the upper mold cavity 21 and the lower mold cavity 31 is exhausted, part of the molten material enters the exhaust hole 54, and the heating block 58 in the exhaust hole 54 heats the molten material to prevent the molten material from cooling and solidifying into molding, and the first spring 56 pushes the movable plate 53, and the movable plate 53 drives the connecting rod 52 and the push block 51 to press the molten material into the upper mold cavity 21.

[0030] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An injection mold exhaust device, characterized in that: The invention comprises a support (1), an upper mold (2), a lower mold (3), an exhaust assembly (5) and a locking assembly (6), wherein the lower mold (3) is arranged on the support (1), the upper mold (2) is movably arranged on the lower mold (3), an upper mold cavity (21) is arranged inside the bottom end of the upper mold (2), and a lower mold cavity (31) is arranged inside the top end of the lower mold (3), the locking assembly (6) is arranged on the lower mold (3), the exhaust assembly (5) comprises a push block (51), a connecting rod (52), a movable plate (53), a first spring (56) and an abutting plate (57), the upper mold (2) is arranged on the bottom end of the upper mold (2), and a lower mold cavity (31) is arranged inside the top end of the lower mold (3), the locking assembly (6) is arranged on the lower mold (3), the exhaust assembly (5) comprises a push block (51), a connecting rod (52), a movable plate (53), a first spring (56) and an abutting plate (57), the upper The mold (2) is provided with an exhaust hole (54) and an assembly groove (55); the push block (51) is movably arranged on the upper mold (2) through the exhaust hole (54); the connecting rod (52) is arranged on an end of the push block (51) away from the lower mold (3); the movable plate (53) is arranged on an end of the connecting rod (52) away from the push block (51); the abutment plate (57) is arranged on the upper mold (2) through the assembly groove (55); one end of the first spring (56) abuts on the movable plate (53); and the other end of the first spring (56) abuts on the abutment plate (57).

2. An injection mold exhaust device according to claim 1, characterized in that: A heating block (58) is arranged through the exhaust hole (54).

3. An injection mold exhaust device according to claim 2, characterized in that: An acceleration channel (59) is provided on the upper mold (2).

4. An injection mold exhaust device according to claim 3, characterized in that: The diameter of the movable plate (53) is smaller than the diameter of the assembly groove (55).

5. An injection mold exhaust device according to claim 4, characterized in that: The locking assembly (6) comprises a baffle (61), a rotating handle (62), a second spring (63), a push rod (64) and a lock core (65); a limiting groove is provided on the lower mold (3); the baffle (61) is arranged on the lower mold (3) through the limiting groove; the push rod (64) is movably arranged on the baffle (61); one end of the second spring (63) abuts against the baffle (61); the other end of the second spring (63) abuts against the push rod (64); the lock core (65) is arranged on one end of the push rod (64) close to the upper mold (2); and the lock core (65) is provided on the upper mold (2).

6. An injection mold exhaust device according to claim 5, characterized in that: The lower mold (3) is provided with a positioning column (7), the upper mold (2) is provided with a positioning groove (71), and the upper mold (2) is provided with a through hole (72).

7. An injection mold exhaust device according to claim 6, characterized in that: The support (1) is provided with an injection port (4), the lower mold (3) is provided with a connection hole, and the injection port (4) is connected to the lower mold cavity (31) through the connection hole.

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