Hot runner needle valve

Abstract

The utility model belongs to the technical field of hot runner needle valves, and particularly relates to a hot runner needle valve which comprises a splitter plate, a hot nozzle body is arranged in the splitter plate, a pouring gate is arranged at the lower end of the hot nozzle body, a valve needle is arranged in the hot nozzle body, and the valve needle is in contact with the pouring gate. The inner wall of the hot nozzle body is fixedly connected with a limiting block, the inner wall of the hot nozzle body is slidably connected with a mounting cylinder, and the mounting cylinder makes contact with the limiting block. The mounting cylinder is pushed to be inserted into the hot nozzle body, so that the mounting cylinder is in contact with the limiting block, the elastic clamping block is squeezed into the connecting block, the mounting cylinder drives the heating wire to be stable, independent temperature control can be achieved under the action of the heating wire, and the hot nozzle body has excellent thermal performance; and accurate and repeatable process capability can be provided, so that the quality of parts is improved, and the heating wire can be quickly replaced, maintained and used on site.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner needle valves, and specifically relates to a hot runner needle valve. Background Art

[0002] The hot runner needle valve is a key component in an injection mold, used to control the flow and filling of plastic materials in the mold. The function of the hot runner needle valve is to control the flow time and speed of plastic materials by controlling the opening and closing of the needle valve during the injection molding process, ensuring that the injection-molded plastic products are evenly filled in the mold cavity, and avoiding defects such as air bubbles, short shots, and others. At the same time, the hot runner needle valve can also help reduce the waste of plastic materials and improve production efficiency.

[0003] In the utility model patent with the patent authorization announcement number CN217648865U, a hot runner valve needle is disclosed, which includes a docking sleeve and a control body. A guiding sleeve is fixedly installed at the lower end of the docking sleeve by threading, and a valve head is fixedly connected to the lower end of the guiding sleeve. The control body includes a cylinder, the lower end of the rod body of the cylinder is fixedly connected with a needle rod, the lower end of the needle rod is fixedly connected with a ball block, the control body also includes a mounting flange, and the lower end of the mounting flange is fixedly connected to the upper end of the cylinder. The guiding sleeve includes a threaded ring and a material guiding sleeve.

[0004] However, the existing hot runner needle valves also have certain deficiencies. The existing hot runner needle valves mostly simply use the cooperation of structural components such as a hot nozzle body and a gate to complete the flow of the plastic hot flow. Due to the influence of external environmental differences, the thermal performance of the plastic hot flow is likely to become weak. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a hot runner needle valve, which solves the problem that the existing hot runner needle valves mostly simply use the cooperation of structural components such as a hot nozzle body and a gate to complete the flow of the plastic hot flow, and due to the influence of external environmental differences, the thermal performance of the plastic hot flow is likely to become weak.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A hot runner needle valve includes a manifold plate, a hot nozzle body is arranged inside the manifold plate, a gate is arranged at the lower end of the hot nozzle body, a valve needle is arranged inside the hot nozzle body, the valve needle contacts the gate, a limiting block is fixedly connected to the inner wall of the hot nozzle body, an installation cylinder is slidably connected to the inner wall of the hot nozzle body, the installation cylinder contacts the limiting block, and a heating wire is arranged inside the installation cylinder;

[0007] A connecting block is fixedly connected to the lower end of the installation cylinder, the connecting block is slidably connected to the hot nozzle body, the connecting block contacts the gate, an elastic clamping block is adhesively connected to the inner wall of the hot nozzle body, the elastic clamping block is slidably connected to the clamping hole of the connecting block, and a driving mechanism is arranged at the upper end of the manifold plate.

[0008] Preferably, two limiting blocks are provided, and the two limiting blocks are symmetrically distributed on the hot nozzle body. Through the arrangement of the limiting blocks, the installation cylinder can be limited for use.

[0009] Preferably, a cable plug is arranged on the right side of the hot nozzle body, and the cable plug is electrically connected to the heating wire. Through the arrangement of the cable plug, the electrical conduction effect of the heating wire can be ensured.

[0010] Preferably, the elastic clamping block is circular as a whole, and the elastic clamping block is made of high-temperature resistant rubber. Through the arrangement of the elastic clamping block, the connecting block can be clamped for use, and the high-temperature resistant rubber material has good heat resistance and deformation effects.

[0011] Preferably, the driving mechanism includes a fixed frame. The upper end of the flow dividing plate is fixedly connected with the fixed frame. A cylinder is fixedly installed on the horizontal part of the fixed frame. The telescopic end of the cylinder is fixedly connected with the valve needle. A positioning hole is formed in the vertical part of the fixed frame. The telescopic end of the cylinder is fixedly connected with a support frame. A telescopic frame is slidably connected to the vertical part of the support frame. A positioning ball is fixedly connected to the vertical part of the telescopic frame, and the positioning ball is slidably connected with the positioning hole. Through the telescopic action of the cylinder, the valve needle can be driven to move. Under the structures such as the positioning hole and the positioning ball, the position of the valve needle can be positioned for use.

[0012] Preferably, a plurality of positioning holes are provided, and the plurality of positioning holes are evenly distributed on the fixed frame. Through the arrangement of the positioning holes, it is convenient to cooperate with the positioning ball for clamping use.

[0013] Preferably, a spring is welded to the inner side wall of the telescopic frame, and the other end of the spring is welded to the vertical part of the support frame. Through the arrangement of the spring, the telescopic frame can be tightly pushed.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, by pushing the installation cylinder into the hot nozzle body, the installation cylinder contacts the limiting block, and the elastic clamping block is squeezed into the connecting block, so that the installation cylinder drives the heating wire to be stable. Under the action of the heating wire, it can be used for independent temperature control, so that the hot nozzle body has excellent thermal performance, can provide accurate and repeatable process capabilities, thereby improving the part quality, and the heating wire can also be quickly replaced and maintained on site.

[0016] 2. In the present utility model, through the telescopic action of the cylinder, the valve needle can be driven to move to automatically open and close the needle valve. Under the structures such as the positioning ball, the positioning hole and the spring, the telescopic end of the cylinder can be limited, and further the position of the valve needle can be positioned for use. Description of the Drawings

[0017] Figure 1 is the three-dimensional structure diagram of the overall structure of the present utility model;

[0018] Figure 2 of the present utility model Figure 1 front elevation sectional view;

[0019] Figure 3 of the present utility model Figure 1 enlarged view at A;

[0020] Figure 4 of the present utility model Figure 2 enlarged view of the mounting cylinder.

[0021] In the figure: 1, flow splitter plate; 2, hot nozzle body; 3, gate; 4, valve pin; 5, limit block; 6, mounting cylinder; 7, heating wire; 8, cable plug; 9, connecting block; 10, elastic clamping block; 11, drive mechanism; 111, fixing frame; 112, cylinder; 113, positioning hole; 114, support frame; 115, telescopic frame; 116, spring; 117, positioning ball. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , a hot runner needle valve, comprising a flow splitter plate 1, a hot nozzle body 2 is arranged inside the flow splitter plate 1, a gate 3 is arranged at the lower end of the hot nozzle body 2, a valve pin 4 is arranged inside the hot nozzle body 2, the valve pin 4 is in contact with the gate 3, a limit block 5 is fixedly connected to the inner wall of the hot nozzle body 2, a mounting cylinder 6 is slidably connected to the inner wall of the hot nozzle body 2, the mounting cylinder 6 is in contact with the limit block 5, and a heating wire 7 is arranged inside the mounting cylinder 6;

[0024] A connecting block 9 is fixedly connected to the lower end of the mounting cylinder 6, the connecting block 9 is slidably connected to the hot nozzle body 2, the connecting block 9 is in contact with the gate 3, an elastic clamping block 10 is adhesively connected to the inner wall of the hot nozzle body 2, and the elastic clamping block 10 is slidably connected to the clamping hole of the connecting block 9.

[0025] Please refer to Figure 1 , Figure 2 , Figure 4, there are two limit blocks 5, and the two limit blocks 5 are symmetrically distributed on the hot nozzle body 2. Through the setting of the limit blocks 5, the installation cylinder 6 can be limited. A cable plug 8 is arranged on the right side of the hot nozzle body 2, and the cable plug 8 is electrically connected to the heating wire 7. Through the setting of the cable plug 8, the electrical conduction effect of the heating wire 7 can be ensured. The elastic clamping block 10 is circular as a whole, and the elastic clamping block 10 is made of high-temperature resistant rubber. Through the setting of the elastic clamping block 10, the connecting block 9 can be clamped, and the high-temperature resistant rubber material has good heat resistance and deformation effects.

[0026] Please refer to Figure 1 , Figure 2 , Figure 3 , a driving mechanism 11 is arranged at the upper end of the flow splitter plate 1. The driving mechanism 11 includes a fixed frame 111. The fixed frame 111 is fixedly connected to the upper end of the flow splitter plate 1. A cylinder 112 is fixedly installed on the horizontal part of the fixed frame 111. The telescopic end of the cylinder 112 is fixedly connected to the valve needle 4. A positioning hole 113 is opened in the vertical part of the fixed frame 111. The telescopic end of the cylinder 112 is fixedly connected to a support frame 114. A telescopic frame 115 is slidably connected to the vertical part of the support frame 114. A positioning ball 117 is fixedly connected to the vertical part of the telescopic frame 115. The positioning ball 117 is slidably connected to the positioning hole 113. Through the telescopic action of the cylinder 112, the valve needle 4 can be driven to move. Under the structures such as the positioning hole 113 and the positioning ball 117, the position of the valve needle 4 can be positioned.

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , there are multiple positioning holes 113, and the multiple positioning holes 113 are evenly distributed on the fixed frame 111. Through the setting of the positioning holes 113, it is convenient to cooperate with the positioning ball 117 for clamping. A spring 116 is welded to the inner side wall of the telescopic frame 115, and the other end of the spring 116 is welded to the vertical part of the support frame 114. Through the setting of the spring 116, the telescopic frame 115 can be tightened.

[0028] The specific implementation process of the present utility model is as follows: During use, by pushing the mounting cylinder 6 into the hot nozzle body 2, the mounting cylinder 6 comes into contact with the limiting block 5. Under the action of the limiting block 5, the mounting cylinder 6 can be limited in use and drives the connecting block 9 to be inserted into the hot nozzle body 2. Finally, the gate 3 and the hot nozzle body 2 can be installed. During this process, under the extrusion of the port of the mounting cylinder 6, the elastic clamping block 10 deforms, and finally the elastic clamping block 10 moves along the surface of the mounting cylinder 6. Under the action of force, the elastic clamping block 10 can move along the surface of the mounting cylinder 6. When the elastic clamping block 10 slides into the clamping hole of the connecting block 9, the elastic clamping block 10 restores its deformation and squeezes into the connecting block 9 to limit the connecting block 9, making the mounting cylinder 6 stable. Under the action of the heating wire 7, it can be used for independent temperature control, making the hot nozzle body 1 have excellent thermal performance;

[0029] Through the telescopic action of the cylinder 112, the valve needle 4 can be driven to move to open and close the needle valve. During this process, when the telescopic end of the cylinder 112 drives the support frame 114 to move, the telescopic frame 115 can be driven to move, and then the positioning ball 117 can be driven to move. Under the extrusion of the inner wall of the positioning hole 113, the positioning ball 117 can be pushed to move, and then the telescopic frame 115 can be driven to move. The spring 116 deforms, and finally the positioning ball 117 disengages from the positioning hole 113. Under the action of force, the positioning ball 117 moves along the surface of the fixed frame 111. When the positioning ball 117 slides into the next positioning hole 113, the spring 116 restores its deformation to push the positioning ball 117 into the positioning hole 113 to limit the telescopic end of the cylinder 112, and then the position of the valve needle 4 can be positioned.

[0030] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hot runner needle valve, comprising a manifold (1), characterized in that: A hot nozzle body (2) is arranged inside the diverter plate (1), a gate (3) is arranged at the lower end of the hot nozzle body (2), a valve needle (4) is arranged inside the hot nozzle body (2), the valve needle (4) is in contact with the gate (3), the inner wall of the hot nozzle body (2) is fixedly connected to a limit block (5), the inner wall of the hot nozzle body (2) is slidably connected to a mounting tube (6), the mounting tube (6) is in contact with the limit block (5), and a heating wire (7) is arranged inside the mounting tube (6); The lower end of the mounting cylinder (6) is fixedly connected to a connecting block (9), the connecting block (9) is slidably connected to the hot nozzle body (2), the connecting block (9) is in contact with the gate (3), an elastic clamping block (10) is bonded to the inner wall of the hot nozzle body (2), the elastic clamping block (10) is slidably connected to a clamping hole of the connecting block (9), and a driving mechanism (11) is provided at the upper end of the diverter plate (1).

2. A hot runner needle valve according to claim 1, characterized in that: Two limit blocks (5) are provided, and the two limit blocks (5) are symmetrically distributed on the hot nozzle body (2).

3. The hot runner needle valve according to claim 1, characterized in that: A cable plug (8) is provided on the right side of the hot nozzle body (2), and the cable plug (8) is electrically connected to the heating wire (7).

4. The hot runner needle valve according to claim 1, characterized in that: The elastic clamping block (10) is circular in shape as a whole, and is made of high temperature resistant rubber material.

5. The hot runner needle valve according to claim 1, characterized in that: The driving mechanism (11) comprises a fixed frame (111), the upper end of the diverter plate (1) is fixedly connected to the fixed frame (111), a cylinder (112) is fixedly mounted on the horizontal portion of the fixed frame (111), the telescopic end of the cylinder (112) is fixedly connected to the valve needle (4), a positioning hole (113) is provided on the vertical portion of the fixed frame (111), the telescopic end of the cylinder (112) is fixedly connected to a support frame (114), the vertical portion of the support frame (114) is slidably connected to a telescopic frame (115), the vertical portion of the telescopic frame (115) is fixedly connected to a positioning ball (117), and the positioning ball (117) is slidably connected to the positioning hole (113).

6. A hot runner needle valve according to claim 5, characterized in that: A plurality of the positioning holes (113) are provided, and the plurality of the positioning holes (113) are evenly distributed on the fixing frame (111).

7. The hot runner needle valve according to claim 5, characterized in that: A spring (116) is welded to the inner side wall of the telescopic frame (115), and the other end of the spring (116) is welded to the vertical portion of the support frame (114).

Images