Hot runner valve needle positioning assembly

Abstract

The utility model relates to the technical field of hot runners of injection molds, and discloses a hot runner valve needle positioning assembly, including a main body mechanism and a connecting mechanism, the connecting mechanism is located at the outer end of the main body mechanism, the main body mechanism includes a hot runner, a valve hole and a valve needle, the valve hole is fixedly arranged at the upper end of the hot runner, the valve needle is movably installed inside the valve hole, and the main body mechanism also includes a main flow channel, a positioning assembly, a diverter plate and a diverter hole. The hot runner valve needle positioning assembly, through the installation of the main body mechanism, realizes that during the use of the needle valve, the positioning assembly is set to make the limit spring push the limit plate, and the limit plate is used to limit the valve needle. When the sol enters the main flow channel from the diverter hole on the diverter plate, the setting of the limit spring can offset the lateral force generated when the sol enters, so that the valve needle is always kept in the center position, which can increase the service life of the valve needle, improve the use effect, and improve the practicality of the hot runner valve needle positioning assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runners of injection molds, in particular to a hot runner valve needle positioning component. Background Art

[0002] Hot runner systems are generally used in injection molds. They use heating to ensure that the plastics in the runners and gates remain in a molten state. Hot runner systems are generally composed of hot nozzles, manifolds, temperature control boxes and accessories. Hot nozzles generally include two types: open hot nozzles and needle valve hot nozzles. Since the form of the hot nozzle directly determines the selection of the hot runner system and the manufacture of the mold, the hot runner system is often divided into open hot runner systems and needle valve hot runner systems. The needle valve hot runner system is used by many high-precision molds because of its material saving, beautiful surface of plastic parts, and tight internal quality and high strength of plastic parts. The needle valve hot runner system uses the mechanical movement of the valve needle to control the closing and opening of the gate.

[0003] The existing CN206277605U patent document proposes a needle-valve type hot runner nozzle, including a hot runner, a fixing device and a power device, and also includes a nozzle core wear-resistant head. The hot runner includes a hot runner body and a valve needle installed on the hot runner body. The nozzle core wear-resistant head is provided with a valve needle hole matched with the valve needle, and one end of the valve needle hole is provided with a conical guide surface; one end of the hot runner body is fixed to the fixing device, and the other end is connected to the nozzle core wear-resistant head. The power device is installed on the fixing device and drives the valve needle to seal or disengage from the valve needle hole. The needle-valve type hot runner nozzle provided by the utility model has one end of the hot runner body connected to the nozzle core wear-resistant head, and a conical guide surface is provided at the inlet of the valve needle hole, which can enhance the wear resistance of the nozzle core and has a good guiding function for the valve needle, thereby effectively protecting the mold glue port.

[0004] However, since the valve needle of the prior art patent technology with publication number CN206277605U may often be subjected to lateral force due to the injection pressure during use, the valve needle may be tilted, thereby reducing the use effect. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model aims to provide a hot runner valve needle positioning assembly to solve the problem in the background art that the valve needle may be frequently subjected to lateral force due to injection pressure, thereby causing the valve needle to tilt and reducing the effect of use.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot runner valve needle positioning assembly, comprising a main body mechanism and a connecting mechanism, the connecting mechanism is located at the outer end of the main body mechanism, the main body mechanism comprises a hot runner, a valve hole and a valve needle, the valve hole is fixedly arranged at the upper end of the hot runner, and the valve needle is movably installed inside the valve hole;

[0009] Preferably, the main body structure also includes a main channel, a positioning assembly, a diverter plate and a diverter hole. The main channel is fixedly arranged inside the hot runner, the positioning assembly is fixedly arranged at the inner end of the hot runner, the diverter plate is fixedly installed at the outer end of the hot runner, and the diverter hole is fixedly arranged at the upper end of the diverter plate. During the use of the needle valve, the positioning assembly is set so that the limit spring pushes the limit plate, and the valve needle is limited by the limit plate. When the sol enters the main channel from the diverter hole on the diverter plate, the lateral force generated when the sol enters can be offset by the setting of the limit spring, so that the valve needle always remains in the center position, which can increase the service life of the valve needle and improve the use effect.

[0010] Preferably, the positioning assembly comprises a mounting groove, a limit spring and a limit plate. The mounting groove is fixedly arranged at the inner end of the hot runner, and the positioning assembly is conveniently installed in the mounting groove.

[0011] Preferably, the limit spring is fixedly installed inside the mounting groove, the limit plate is fixedly installed on the right end of the limit spring, the limit plate is located at the outer end of the valve needle, the limit plate can be pushed by the limit spring, and the valve hole is limited by the limit plate. The limit plate is an arc-shaped structure, which can fit the outer end of the valve needle well.

[0012] Preferably, the connecting mechanism comprises a connecting flange, a sealing gasket, a threaded hole, a bolt gasket and a fastening bolt, and the connecting flange is fixedly mounted on the outer end of the diverter plate.

[0013] Preferably, the sealing gasket is fixedly mounted on the upper end of the connecting flange, and the threaded hole is fixedly arranged on the outside of the sealing gasket. Through the arrangement of the sealing gasket, the sealing performance can be improved when the diverter plate is connected to the mold flow channel to avoid leakage of molten glue.

[0014] Preferably, the bolt washer is movably connected to the lower end of the threaded hole, and the fastening bolt is movably connected to the lower end of the bolt washer. Through the connection between the connecting flange, the threaded hole, the bolt washer and the fastening bolt, the diverter plate can be firmly connected to the mold flow channel to prevent the diverter plate from falling off during use.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The hot runner valve needle positioning assembly, through the installation of the main body mechanism, realizes that during the use of the needle valve, the limiting spring pushes the limiting plate through the setting of the positioning assembly, and the valve needle is limited by the limiting plate. When the sol enters the main flow channel from the diverter hole on the diverter plate, the setting of the limiting spring can offset the lateral force generated when the sol enters, so that the valve needle is always kept in the center position, which can increase the service life of the valve needle, improve the use effect, and improve the practicality of the hot runner valve needle positioning assembly;

[0017] 2. The hot runner valve needle positioning assembly, through the installation of the connecting mechanism, realizes the connection between the connecting flange, threaded holes, gaskets and fastening bolts, so that the manifold plate can be firmly connected to the mold runner to avoid the manifold plate from falling off during use. Through the setting of the sealing gasket, the sealing performance can be improved when the manifold plate is connected to the mold runner, and the leakage of molten glue can be avoided, thereby improving the connection effect of the hot runner valve needle positioning assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 3 This is an enlarged structural diagram of the positioning component of the utility model;

[0021] Figure 4 It is an enlarged structural diagram of the connection mechanism of the utility model.

[0022] In the figure: 1. main body; 101. hot runner; 102. valve hole; 103. valve needle; 104. main channel; 105. positioning assembly; 1051. mounting groove; 1052. limit spring; 1053. limit plate; 106. diverter plate; 107. diverter hole; 2. connecting mechanism; 201. connecting flange; 202. sealing gasket; 203. threaded hole; 204. bolt washer; 205. fastening bolt. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 4The utility model provides a technical solution: a hot runner valve needle positioning assembly, including a main body mechanism 1 and a connecting mechanism 2, the connecting mechanism 2 is located at the outer end of the main body mechanism 1, the main body mechanism 1 includes a hot runner 101, a valve hole 102 and a valve needle 103, the valve hole 102 is fixedly arranged at the upper end of the hot runner 101, and the valve needle 103 is movably installed inside the valve hole 102.

[0025] The main mechanism 1 also includes a main flow channel 104, a positioning assembly 105, a diverter plate 106 and a diverter hole 107. The main flow channel 104 is fixedly arranged inside the hot runner 101, the positioning assembly 105 is fixedly arranged at the inner end of the hot runner 101, the diverter plate 106 is fixedly arranged at the outer end of the hot runner 101, and the diverter hole 107 is fixedly arranged at the upper end of the diverter plate 106. The positioning assembly 105 includes a mounting groove 1051, a limit spring 1052 and a limit plate 1053. The mounting groove 1051 is fixedly arranged at the inner end of the hot runner 101, and the limit spring 1052 is fixedly arranged at the mounting groove 1051. The limit plate 1053 is fixedly installed on the right end of the limit spring 1052 inside, and the limit plate 1053 is located at the outer end of the valve needle 103. During the use of the needle valve, the limit spring 1052 pushes the limit plate 1053 through the setting of the positioning component 105, and the valve needle 103 is limited by the limit plate 1053. When the sol enters the main channel 104 from the diverter hole 107 on the diverter plate 106, the setting of the limit spring 1052 can offset the lateral force generated when the sol enters, so that the valve needle 103 always remains in the center position, which can increase the service life of the valve needle 103.

[0026] The connecting mechanism 2 includes a connecting flange 201, a sealing gasket 202, a threaded hole 203, a bolt washer 204 and a fastening bolt 205. The connecting flange 201 is fixedly installed on the outer end of the diverter plate 106, the sealing gasket 202 is fixedly installed on the upper end of the connecting flange 201, the threaded hole 203 is fixedly arranged on the outer side of the sealing gasket 202, the bolt washer 204 is movably connected to the lower end of the threaded hole 203, and the fastening bolt 205 is movably connected to the lower end of the bolt washer 204. During installation, the diverter plate 106 can be firmly connected to the mold flow channel through the connection between the connecting flange 201, the threaded hole 203, the bolt washer 204 and the fastening bolt 205 to prevent the diverter plate 106 from falling off during use. Through the setting of the sealing gasket 202, the sealing performance can be improved when the diverter plate 106 is connected to the mold flow channel to prevent molten glue leakage.

[0027] Working principle: During installation, the connection between the connecting flange 201, the threaded hole 203, the bolt washer 204 and the fastening bolt 205 can firmly connect the diverter plate 106 to the mold flow channel to prevent the diverter plate 106 from falling off during use. The setting of the sealing gasket 202 can improve the sealing when the diverter plate 106 is connected to the mold flow channel to prevent molten glue leakage. During the use of the needle valve, the positioning component 105 is set to make the limit spring 1052 push the limit plate 1053, and the limit plate 1053 is used to limit the valve needle 103. When the sol enters the main flow channel 104 from the diverter hole 107 on the diverter plate 106, the setting of the limit spring 1052 can offset the lateral force generated when the sol enters, so that the valve needle 103 always remains in the center position, which can increase the service life of the valve needle 103.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A hot runner valve needle positioning assembly, comprising a main body mechanism (1) and a connecting mechanism (2), characterized in that: The connecting mechanism (2) is located at the outer end of the main body mechanism (1); the main body mechanism (1) comprises a hot runner (101), a valve hole (102) and a valve needle (103); the valve hole (102) is fixedly arranged at the upper end of the hot runner (101); and the valve needle (103) is movably installed inside the valve hole (102); The main body structure (1) further comprises a main flow channel (104), a positioning assembly (105), a diverter plate (106) and a diverter hole (107); the main flow channel (104) is fixedly arranged inside the hot runner (101); the positioning assembly (105) is fixedly arranged at the inner end of the hot runner (101); the diverter plate (106) is fixedly installed at the outer end of the hot runner (101); and the diverter hole (107) is fixedly arranged at the upper end of the diverter plate (106).

2. A hot runner valve needle positioning assembly according to claim 1, characterized in that: The positioning assembly (105) comprises a mounting groove (1051), a limiting spring (1052) and a limiting plate (1053); the mounting groove (1051) is fixedly arranged at the inner end of the hot runner (101).

3. A hot runner valve needle positioning assembly according to claim 2, characterized in that: The limit spring (1052) is fixedly mounted inside the mounting groove (1051), and the limit plate (1053) is fixedly mounted on the right end of the limit spring (1052). The limit plate (1053) is located at the outer end of the valve needle (103).

4. A hot runner valve needle positioning assembly according to claim 3, characterized in that: The connection mechanism (2) comprises a connection flange (201), a sealing gasket (202), a threaded hole (203), a bolt gasket (204) and a fastening bolt (205); the connection flange (201) is fixedly mounted on the outer end of the diverter plate (106).

5. A hot runner valve needle positioning assembly according to claim 4, characterized in that: The sealing gasket (202) is fixedly mounted on the upper end of the connecting flange (201), and the threaded hole (203) is fixedly arranged on the outer side of the sealing gasket (202).

6. A hot runner valve needle positioning assembly according to claim 5, characterized in that: The bolt washer (204) is movably connected to the lower end of the threaded hole (203), and the fastening bolt (205) is movably connected to the lower end of the bolt washer (204).

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