Injection molding control valve

Abstract

The utility model provides an injection molding control valve which comprises a valve body and a valve body installation seat, a valve element is arranged in the valve body in a sliding mode, a via hole is formed in the valve body installation seat, a through hole is formed in the valve body, the via hole is communicated with the through hole, and a through hole is formed in the middle of the valve element. The check valve is characterized in that a containing cavity with an opening in one end is formed in the valve body mounting seat, and the valve body is detachably arranged in the containing cavity; a through hole is formed in the valve body, a first annular groove and a second annular groove are formed in the two sides of the through hole respectively, the first annular groove is sleeved with a high-temperature-resistant sealing ring, the second annular groove is sleeved with a high-pressure-resistant sealing ring, and the high-temperature-resistant sealing ring and the high-pressure-resistant sealing ring make uniform contact with the inner wall of the valve body. And a detachable driving guide device is arranged between the valve body mounting seat and the valve core. By means of the structure, the sealing performance is good, and the valve element and the valve body are convenient to clean and replace.

Description

Technical Field

[0001] The utility model relates to the field of injection molding devices, and particularly to a dynamic injection molding control valve. Background Art

[0002] With the development of production and the progress of technology, injection molding control valves play a crucial role in injection molding machines. A stable feed rate is beneficial to maintaining the stability of the production process, improving the overall quality of products, and avoiding material waste caused by inaccurate feeding. Therefore, controlling the material to prevent leakage can reduce material losses caused by leakage, and further reduce the defective rate of finished products.

[0003] For example, in the patent document with the patent application number 201520130985.X and the publication date of September 2, 2015, a hydraulic double-station synchronous high-temperature sealant device for an injection molding machine is disclosed, which includes a barrel and a nozzle. A reversing valve for changing the flow direction of molten plastic is arranged between the barrel and the nozzle. A heating cylinder is also connected to the reversing valve. The reversing valve includes a valve body and a valve core slidably arranged in the valve body. The valve body is provided with a valve core hole for accommodating the movement of the valve core, a feeding channel for connecting the barrel and the valve core hole, a feeding channel for connecting the heating cylinder and the valve core hole, and a discharging channel for connecting the nozzle and the valve core hole. The valve core is provided with a first conveying channel for connecting the feeding channel and the discharging channel and a second conveying channel for connecting the feeding channel and the feeding channel. The first conveying channel and the second conveying channel are separated from each other. A hydraulic cylinder is also arranged on the valve body, and the piston rod of the hydraulic cylinder is fixedly connected to the valve core.

[0004] In the above document, when the valve core slides in the valve body, several annular grooves are arranged on the valve core to allow molten plastic to leak into the annular grooves. When the temperature of the reversing valve drops to a certain level, the molten plastic cools and solidifies, which is equivalent to setting a sealing ring in the annular groove without setting a high-temperature-resistant sealing ring on the valve core. It is easy to occur that the molten plastic cannot be evenly filled in the groove during cooling, resulting in poor sealing in some areas and material leakage. In addition, the annular groove is filled with molten plastic, and it can only play a sealing role when the temperature drops. If the hydraulic double-station synchronous high-temperature sealant device for an injection molding machine is working, the temperature of the molten plastic will be transmitted to the reversing valve, and then the solidified plastic filled in the annular groove will melt again, thus unable to play a sealing role. Moreover, when it is necessary to clean or replace the valve core, the valve core can only be pulled out from the valve body, so it is not convenient to clean the remaining plastic in the valve body. Therefore, the operation is not convenient. Summary of the Invention

[0005] The purpose of the utility model is to provide an injection molding control valve. By using the structure of the utility model, the sealing performance is good, and it is convenient to clean and replace the valve core and the valve body.

[0006] To achieve the above object, the technical solution of the present utility model is: an injection molding control valve, including a valve body and a valve body mounting seat. A valve core is slidably arranged in the valve body. A through hole is provided on the valve body mounting seat, and a through hole is provided on the valve body. The through hole communicates with the through hole. A through hole is provided in the middle of the valve core. A receiving cavity with an opening at one end is provided on the valve body mounting seat. The valve body is detachably arranged in the receiving cavity. First annular grooves and second annular grooves are respectively arranged on both sides of the through hole. A high-temperature resistant sealing ring is sleeved on the first annular groove, and a high-pressure resistant sealing ring is provided on the second annular groove. The high-temperature resistant sealing ring and the high-pressure resistant sealing ring are in contact with the inner wall of the valve body. A detachable driving and guiding device is provided between the valve body mounting seat and the valve core.

[0007] With the above settings, since two different sealing rings are respectively arranged on both sides of the through hole of the valve core, a double-sealing effect can be achieved. Since the valve body mounting seat and the valve body are provided, the valve core is slidably arranged on the valve body, and the driving and guiding device is connected to the valve core. Therefore, when installation and disassembly are required, the valve body, the valve core, and the driving and guiding device can be integrally installed and disassembled. In this way, the valve body is also installed and disassembled accordingly. When the valve core needs to be cleaned, the valve body, the valve core, and the driving and guiding device are integrally disassembled, which is convenient for cleaning the valve body and the valve core. In addition, since the valve core will move relative to the valve body frequently, and since the valve body is provided between the valve body mounting seat and the valve core, when the valve body or the valve core is worn, the valve body mounting seat does not need to be replaced, which can reduce costs.

[0008] Further, the valve body mounting seat includes a valve body mounting seat body and a cover plate. The cover plate is connected to one side wall of the valve body mounting seat body by bolts. The receiving cavity is formed on the valve body mounting seat body and the cover plate, and the opening of the receiving cavity is located on the cover plate. With this structure, the driving and guiding device can be connected to the cover plate. When the valve core, the valve body, and the driving and guiding device need to be disassembled, only the cover plate needs to be separated from the valve body mounting seat body, and the installation and disassembly are convenient.

[0009] Further, the driving and guiding device includes a driving device and a guiding connection device. The driving device includes a hydraulic cylinder and a hydraulic cylinder mounting seat. The hydraulic cylinder is fixedly connected to the hydraulic cylinder mounting seat, and the guiding connection device is arranged between the valve core and the piston rod of the hydraulic cylinder.

[0010] With the above settings, the hydraulic cylinder needs to work in a stable working environment. By fixedly connecting the hydraulic cylinder to the hydraulic cylinder mounting seat, the fixed connection ensures that the position of the hydraulic cylinder is stable during use and will not shift due to external forces and its own impact, so that the vibration generated by the hydraulic cylinder during operation can be effectively isolated, reducing the vibration impact on the overall equipment.

[0011] Further, the guiding and connecting device includes a guiding plate, a connecting plate and guiding rods. The hydraulic cylinder is further provided with a piston rod, which is fixedly connected to the connecting plate. The connecting plate is fixedly connected to the valve core. The guiding plate passes through the valve core and is fixedly connected to the connecting plate. Two guiding rods are respectively slidably connected to both sides of the guiding plate. One end of each guiding rod is fixedly connected to the valve body mounting seat, and the other end of the guiding rod is fixedly connected to the hydraulic cylinder mounting seat.

[0012] With the above settings, the piston rod is fixedly connected to the connecting plate, and the connecting plate is fixedly connected to the valve core. Thus, the movement of the piston rod can drive the movement of the valve core. The guiding plate passes through the valve core and is fixedly connected to the connecting plate. Guiding rods are arranged on both sides of the guiding plate. The guiding plate can provide a guiding effect for the movement of the piston rod, enabling it to move along the expected movement trajectory, and can also provide partial support for the piston rod, ensuring that the normal movement trajectory will not deviate even when the elongation is large.

[0013] Further, the valve core includes a valve core body and a boss provided at one end of the valve core body. Two cutting edges are oppositely provided on the boss, and the cutting edges are horizontally abutted against the inner wall of the guiding plate.

[0014] With the above settings, the boss is provided with cutting edges that are abutted against the inner wall of the guiding plate, effectively preventing the valve core from rotating during movement and ensuring that the position of the through hole of the valve core does not rotate when the valve body moves.

[0015] Further, one or more oil grooves are provided on the valve core body at the outer end of the second annular groove. The oil grooves are used for storing oil and play a lubricating role.

[0016] Further, a sealing gasket is provided between the valve body mounting seat body and the cover plate. The sealing gasket can improve the sealing performance between the cover plate and the valve body mounting seat body.

[0017] Further, a guiding groove is provided on the inner wall of the accommodating cavity of the valve body mounting seat, and a guiding strip is provided on the outer wall of the valve body, which is matched with the guiding groove. By providing the guiding strip and the guiding groove, when installing the valve body, it can guide the valve body into the accommodating cavity.

[0018] Further, the diameters of the through hole on the valve core, the through hole on the valve body and the through hole on the valve body mounting seat are the same.

[0019] With the above settings, when the material passes through the through hole, the through hole and the through hole, since the diameters of the three are the same, the flow rate of the material in the through hole can be controlled by moving the valve core, thereby realizing precise flow control of the material, improving the safety of the equipment and the flexibility of operation, and reducing material loss at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the front view of the present utility model.

[0021] Figure 2 This is the exploded view of the present utility model.

[0022] Figure 3 is Figure 2 the enlarged view at position A in

[0023] Figure 4 This is the connection schematic diagram of the guide plate, valve body and valve core of the present utility model.

[0024] Figure 5 This is the connection schematic diagram of the valve body and valve core of the present utility model.

[0025] Figure 6 This is the front view of the valve core in the present utility model.

[0026] Explanation of the reference numerals in the attached drawings: 1-valve body mounting seat; 11-through hole; 101-valve body mounting seat body; 102-cover plate; 103-sealing gasket; 104-accommodating cavity; 1041-opening of the accommodating cavity; 105-guide groove; 2-valve body; 21-through hole; 22-guide bar; 3-valve core; 30-valve core body; 31-boss; 311-trimmed edge; 32-annular groove; 33-first groove; 34-second groove; 35-through hole; 4-driving and guiding device; 41-guide plate; 42-connecting plate; 43-guide rod; 5-driving device; 51-hydraulic cylinder; 511-piston rod; 52-hydraulic cylinder mounting seat. Detailed implementation manners

[0027] The following further describes the present utility model in detail in conjunction with the attached drawings and specific implementation manners.

[0028] As Figures 1 to 6 shown, an injection molding control valve includes a valve body mounting seat 1, a valve body 2, a valve core 3 and a driving and guiding device 4.

[0029] The valve body mounting seat 1 includes a valve body mounting seat body 101 and a cover plate 102. The cover plate 102 is connected to a side wall of the valve body mounting seat body 101 by bolts. A horizontally extending accommodating cavity 104 is formed within the valve body mounting seat body 101 and the cover plate 102. The cross-section of the accommodating cavity 104 is square. The accommodating cavity 104 cooperates with the valve body 2, and the opening 1041 of the accommodating cavity is located on the cover plate 102. To improve the sealing performance, a sealing gasket 103 is provided between the valve body mounting seat body 101 and the cover plate 102. A vertically extending through hole 11 is provided on the valve body mounting seat body 101, and the through hole 11 communicates with the accommodating cavity 104.

[0030] The outer cross-section of the valve body 2 is square, and the valve body 2 is detachably arranged in the accommodating cavity 104. In order to better install the valve body 2 into the accommodating cavity 104, a guiding groove 105 is provided on the inner wall of the accommodating cavity on the valve body mounting seat 1, and a guiding strip 22 matching the guiding groove is provided on the outer wall of the valve body. A through hole 21 communicating with the through hole 11 is provided on the valve body 2.

[0031] A valve core 3 is slidably arranged in the valve body 2. A through hole 35 is provided in the middle of the valve core 3. A first annular groove 33 and a second annular groove 34 are respectively provided on both sides of the through hole 35. A high-temperature resistant sealing ring is sleeved on the first annular groove 33, and a high-pressure resistant sealing ring is sleeved on the second annular groove 34. The valve core 3 includes a valve core body 30 and a boss 31 arranged at one end of the valve core body. An oil groove 32 is provided on the valve core body at the outer end of the second annular groove 34. The oil groove 32 is used for storing oil, which can play a lubricating role when the valve core is moving. A driving and guiding device 4 is further provided between the valve body mounting seat 1 and the valve core 3. High-temperature resistant sealing rings and high-pressure resistant sealing rings are respectively provided on both sides of the through hole 35 of the valve core 3. By providing two different sealing rings, material leakage is effectively prevented, so that when the driving and guiding device 4 controls the movement of the valve core 3 on the valve body 2, the sealing performance between the valve core 3 and the valve body 2 is ensured, and it is ensured that no material leakage occurs during the movement of the valve core 3.

[0032] The valve body mounting seat 1 is connected to the material. The material can reach the valve body mounting seat 1 through the through hole 11 and then reach the valve body 2.

[0033] The diameters of the through hole 35 on the valve core 3, the through hole 21 on the valve body 2, and the through hole 11 on the valve body mounting seat 1 are the same. When the material passes through the through hole 11, the through hole 21, and the through hole 35, due to the same diameters of the three, the flow rate of the material in the through hole 35 can be controlled by moving the valve core 3, so as to realize the precise flow control of the material, improve the safety of the equipment and the flexibility of operation, and reduce material loss at the same time.

[0034] As Figure 2 shown, the driving and guiding device 4 includes a driving device 5 and a guiding and connecting device. The driving device 5 includes a hydraulic cylinder 51 and a hydraulic cylinder mounting seat 52. The hydraulic cylinder 51 is fixedly connected to the hydraulic cylinder mounting seat 52. The hydraulic cylinder 51 needs to work in a stable working environment. By fixedly connecting the hydraulic cylinder 51 to the hydraulic cylinder mounting seat 52, the fixed connection ensures that the position of the hydraulic cylinder 51 is stable during use and will not shift due to external forces and its own impact, so that the vibration generated by the hydraulic cylinder 51 during the working process can be effectively isolated, reducing the vibration impact on the overall equipment.

[0035] As Figure 3As shown, the guiding connection device includes a guiding plate 41, a connecting plate 42 and guiding rods 43. The hydraulic cylinder 51 is further provided with a piston rod 511. The piston rod 511 is fixedly connected to the connecting plate 42. The connecting plate 42 is fixedly connected to the valve core 3. The guiding plate 41 passes through the boss 31 of the valve core 3 and is fixedly connected to the connecting plate 42. Guiding rods 43 are slidably connected to both sides of the guiding plate 41 respectively. One end of each guiding rod 43 is fixedly connected to the valve body mounting seat, and the other end of each guiding rod 43 is fixedly connected to the hydraulic cylinder mounting seat 52. The fixed connection between the piston rod 511 and the connecting plate 42, and the fixed connection between the connecting plate 42 and the valve core 3 enable the movement of the piston rod 511 to drive the movement of the valve core 3. The guiding plate 41 passes through the boss 31 on the valve core 3 and is fixedly connected to the connecting plate 42. Guiding rods 43 are arranged on both sides of the guiding plate 41. The guiding plate 41 can provide a guiding effect for the movement of the piston rod 511, enabling it to move along the expected movement trajectory, and can also provide partial support for the piston rod 511, ensuring that the normal movement trajectory will not shift even when the elongation is large.

[0036] As Figure 4 and Figure 5 As shown, two cutting edges 311 are oppositely arranged on the boss 31 of the valve core 3. The cutting edges 311 are horizontally abutted against the inner wall of the guiding plate 41. The boss 31 provided on the valve core 3 can limit the movement of the valve core 3 in the valve body 2, preventing the valve core 3 from moving excessively. The boss 31 is provided with cutting edges 311, and the cutting edges 311 are abutted against the inner wall of the guiding plate 41, effectively preventing the valve core 3 from rotating during movement and ensuring that the position of the through hole 35 of the valve core 3 will not rotate when the valve body 2 moves.

[0037] The valve body 2 is provided with a valve core hole for accommodating the sliding of the valve core 3. The valve body 2 is further provided with a through hole 21. The valve core hole provided in the valve body 2 ensures the stability of the valve core 3 during movement, facilitating the smooth movement of the valve core 3. The valve body 2 is provided with a through hole 21. When the through hole 35 on the valve core 3 moves to the relative position of the through hole 21, the material can pass through the through hole 21 to reach the through hole 35 on the valve core 3.

[0038] Working principle of the utility model: The through hole 11 of the valve body mounting seat 1 is connected to the material. The valve body 2 is fixedly installed in the valve body mounting seat 1. The valve core 3 is slidably arranged in the valve body 2. The valve core 3 is provided with a guiding device 4. The hydraulic cylinder 51 is fixedly installed on the hydraulic cylinder 51 mounting seat. The hydraulic cylinder 51 is provided with a piston rod 511. The piston rod 511 is fixedly connected to the connecting plate 42. The guiding plate 41 passes through the boss 31 of the valve core 3 and is fixedly connected to the connecting plate 42. At this time, when the hydraulic cylinder 51 is started, the piston rod 511 starts to move. The movement of the piston rod 511 drives the connecting plate 42 to move. The movement of the connecting plate 42 drives the valve core 3 to move in the valve body 2, so that the axes of the through hole 11 of the valve body mounting seat 1, the through hole 21 of the valve body 2 and the through hole 35 of the valve core 3 are aligned. The material reaches the valve body 2 from the valve body mounting seat 1 and then passes through the through hole 35 of the valve core 3. The material can pass through the through hole 35 of the valve core 3 to complete the conveying of the material. When the material conveying is completed, the piston rod 511 of the hydraulic cylinder 51 drives the connecting plate 42 to move away from the valve body mounting seat 1, and the through hole 35 of the valve core 3 is misaligned with the through hole 21 of the valve body 2 to complete the stop of the material conveying.

[0039] In this embodiment, since two different sealing rings are respectively arranged on both sides of the valve core through hole, a double sealing effect can be achieved. Since the valve body mounting seat and the valve body are provided, the valve core is slidably arranged on the valve body, and the driving guiding device is connected to the valve core. Therefore, when installation and disassembly are required, the valve body, the valve core and the driving guiding device can be integrally installed and disassembled. In this way, the valve body is also installed and disassembled accordingly. When it is necessary to clean the valve core, the valve body, the valve core and the driving guiding device are integrally disassembled, which is convenient for cleaning the valve body and the valve core. In addition, since the valve core will move relative to the valve body frequently, and since the valve body is arranged between the valve body mounting seat and the valve core, when the valve body or the valve core is worn, there is no need to replace the valve body mounting seat, which can reduce costs.

Claims

1. An injection molding control valve, comprising a valve body and a valve body mounting seat. A valve core is slidably arranged in the valve body. A through hole is arranged on the valve body mounting seat, and a through hole is arranged on the valve body. The through hole communicates with the through hole. A through hole is arranged in the middle of the valve core. It is characterized in that: A receiving cavity with an opening at one end is provided on the valve body mounting seat, and the valve body is detachably arranged in the receiving cavity; a first annular groove and a second annular groove are respectively arranged on both sides of the through hole, a high-temperature resistant sealing ring is sleeved on the first annular groove, and a high-pressure resistant sealing ring is sleeved on the second annular groove. The high-temperature resistant sealing ring and the high-pressure resistant sealing ring are in contact with the inner wall of the valve body, and a detachable driving and guiding device is arranged between the valve body mounting seat and the valve core.

2. The injection molding control valve according to claim 1, characterized in that: The valve body mounting seat includes a valve body mounting seat body and a cover plate. The cover plate is connected to a side wall of the valve body mounting seat body by bolts, and the receiving cavity is formed on the valve body mounting seat body and the cover plate. The opening of the receiving cavity is located on the cover plate.

3. The injection control valve according to claim 1, characterized in that: The driving and guiding device includes a driving device and a guiding connection device. The driving device includes a hydraulic cylinder and a hydraulic cylinder mounting seat. The hydraulic cylinder is fixedly connected to the hydraulic cylinder mounting seat, and the guiding connection device is arranged between the valve core and the piston rod of the hydraulic cylinder.

4. The injection molding control valve according to claim 3, characterized in that: The guiding connection device includes a guiding plate, a connecting plate and guiding rods. The piston rod is fixedly connected to the connecting plate, the connecting plate is fixedly connected to the valve core, the guiding plate passes through the valve core and is fixedly connected to the connecting plate, guiding rods are respectively slidably connected to both sides of the guiding plate, one end of the guiding rod is fixedly connected to the valve body mounting seat, and the other end of the guiding rod is fixedly connected to the hydraulic cylinder mounting seat.

5. The injection control valve according to claim 4, wherein: The valve core includes a valve core body and a boss arranged at one end of the valve core body. Two cutting edges are oppositely arranged on the valve core boss, and the cutting edges are horizontally abutted against the inner wall of the guiding plate.

6. The injection molding control valve according to claim 5, wherein: One or more oil grooves are arranged on the valve core body at the outer end of the second annular groove.

7. The injection molding control valve according to claim 2, wherein: A gasket is arranged between the valve body mounting seat body and the cover plate.

8. The injection molding control valve according to claim 1, wherein: A guiding groove is arranged on the inner wall of the receiving cavity on the valve body mounting seat, and a guiding strip matched with the guiding groove is arranged on the outer wall of the valve body.

9. The injection molding control valve according to claim 1, wherein: The diameters of the through hole on the valve core, the through hole on the valve body and the through hole on the valve body mounting seat are the same.

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