Hot runner valve needle structure

Abstract

The utility model provides a hot runner valve needle structure, which belongs to the technical field of injection molds and comprises a spreader plate, a pouring component and a positioning component. A hot runner is formed in the splitter plate, and mounting grooves are correspondingly formed in the surface and the bottom of the splitter plate; the valve sleeve is installed in the hot runner, the valve needle is connected into the valve sleeve in a penetrating mode, the valve seat is installed on the top of the valve sleeve, when the pushing device pushes the valve seat, the valve needle in the valve sleeve is driven to move in the hot nozzle body, and the valve needle shrinks towards the interior of the valve sleeve to open the hot nozzle head. According to the pouring assembly, the valve sleeve, the valve needle, the hot nozzle body and the hot nozzle head are all decomposition components, decomposition and disassembly are convenient, dead corner processing and polishing are convenient, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a hot runner valve needle structure. Background Technology

[0002] Hot runner systems use heating to keep the plastic in the runner and gate in a molten state. A hot runner system generally consists of several parts, including hot nozzles, manifolds, temperature control boxes, and accessories. Hot nozzles are generally divided into two types: open hot nozzles and needle valve hot nozzles. During injection molding, the type of hot nozzle directly determines the selection of the hot runner system and the manufacturing of the mold. Therefore, hot runner systems are often divided into open hot runner systems and needle valve hot runner systems. Traditional hot runner structures are complex to process, making them difficult to polish and resulting in dead corners, which leads to high processing costs and makes it difficult to standardize. Utility Model Content

[0003] The purpose of this invention is to provide a hot runner valve needle structure to solve the problems mentioned in the background art, such as the complexity of processing traditional hot runner structures leading to difficulty in polishing, the existence of dead corners, high processing costs, and difficulty in standardization.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hot runner valve needle structure, including a manifold, a casting assembly, and a positioning assembly;

[0005] Wherein: the inside of the manifold is provided with a hot runner channel, and the surface and bottom of the manifold are respectively provided with mounting grooves;

[0006] The casting assembly includes a valve sleeve installed inside a hot runner, a valve needle inserted inside the valve sleeve, a valve seat installed on the top of the valve sleeve, a pushing device on the top of the valve seat, a hot nozzle body installed on the bottom of the valve sleeve, a hot nozzle head installed on the bottom of the hot nozzle body, and the valve needle inserted inside the hot nozzle head.

[0007] The positioning assembly includes a hot nozzle base installed at the bottom of the distributor plate, a hot nozzle positioning pin installed on the surface of the hot nozzle base, the hot nozzle being inserted into the hot nozzle base and fixed by the hot nozzle positioning pin, a positioning block being fixedly installed inside the hot nozzle head, and the valve needle being inserted into the positioning block.

[0008] As a preferred embodiment of this utility model: a heating tube is installed inside the mounting groove, the heating tube is arranged around the hot flow channel, and a connector is installed on one side of the flow divider plate, the connector being connected to both ends of the heating tube.

[0009] As a preferred embodiment of this utility model: an injection nozzle is installed in the middle of the flow divider plate, and the injection nozzle is connected to the hot runner.

[0010] As a preferred embodiment of this utility model: the pushing device includes a cylinder disposed on the top of the valve seat, the cylinder having a telescopic end connected to the valve seat.

[0011] As a preferred embodiment of this utility model, the valve needle is made of hard alloy.

[0012] As a preferred embodiment of this utility model, a heat insulation cap is fitted onto the bottom of the heat nozzle.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) A valve sleeve is installed inside the hot runner, and a valve needle is inserted inside the valve sleeve. A valve seat is installed on the top of the valve sleeve. When the pushing device pushes the valve seat, it causes the valve needle inside the valve sleeve to move inside the hot nozzle body. The valve needle retracts into the valve sleeve, causing the hot nozzle head to open, so that the injection molten material can be sprayed out from the hot nozzle head to achieve casting. The valve sleeve, valve needle, hot nozzle body and hot nozzle head of this casting component are all disassembled components, which are easy to disassemble and disassemble, facilitate the processing of dead corners and polishing, and reduce costs.

[0015] (2) A hot nozzle base is installed at the bottom of the diverter plate through the positioning component. A hot nozzle positioning pin is installed on the surface of the hot nozzle base. The hot nozzle is inserted into the hot nozzle base and fixed by the hot nozzle positioning pin. A positioning block is installed inside the hot nozzle head. The valve needle is inserted into the positioning block to ensure the stability of the valve needle movement and avoid displacement inside the hot nozzle head, which would cause leakage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the disassembled structure of this utility model.

[0018] In the diagram: 1. Manifold; 2. Hot runner; 3. Mounting slot;

[0019] 4. Casting assembly; 41. Valve sleeve; 42. Valve needle; 43. Valve seat; 44. Actuating device; 45. Hot nozzle body; 46. Hot nozzle head;

[0020] 5. Positioning component; 51. Hot nozzle base; 52. Hot nozzle positioning pin; 53. Positioning block;

[0021] 6. Heating element;

[0022] 7. Connector;

[0023] 8. Injection nozzle;

[0024] 9. Cylinder;

[0025] 10. Heat-insulating cap with hot nozzle. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Please see Figure 1 - Figure 2 A hot runner valve needle structure includes: a manifold 1, a casting assembly 4, and a positioning assembly 5; a hot runner 2 is provided inside the manifold 1, and mounting grooves 3 are provided on the surface and bottom of the manifold 1 respectively;

[0028] Please see Figure 1 , Figure 2 The casting assembly 4 includes a valve sleeve 41 installed inside the hot runner 2. A valve needle 42 is inserted inside the valve sleeve 41. A valve seat 43 is installed on the top of the valve sleeve 41. A pushing device 44 is provided on the top of the valve seat 43. A hot nozzle body 45 is installed at the bottom of the valve sleeve 41. A hot nozzle head 46 is installed at the bottom of the hot nozzle body 45. The valve needle 42 is inserted inside the hot nozzle head 46.

[0029] In practical use: A valve sleeve 41 is installed inside the hot runner 2. A valve needle 42 is inserted inside the valve sleeve 41. A valve seat 43 is installed on the top of the valve sleeve 41. When the pushing device 44 pushes the valve seat 43, it causes the valve needle 42 inside the valve sleeve 41 to move inside the hot nozzle body 45. The valve needle 42 retracts into the valve sleeve 41, causing the hot nozzle head 46 to open, so that the injection molten material can be sprayed out from the hot nozzle head 46 to achieve casting. In this casting assembly 4, the valve sleeve 41, valve needle 42, hot nozzle body 45 and hot nozzle head 46 are all disassembled components, which are easy to disassemble and disassemble, facilitate the processing of dead corners and polishing, and reduce costs.

[0030] Please see Figure 1 , Figure 2 The positioning component 5 includes a hot nozzle base 51 installed at the bottom of the diverter plate 1. A hot nozzle positioning pin 52 is installed on the surface of the hot nozzle base 51. The hot nozzle body 45 is inserted inside the hot nozzle base 51 and fixed by the hot nozzle positioning pin 52. A positioning block 53 is fixedly installed inside the hot nozzle head 46. The valve needle 42 is inserted inside the positioning block 53.

[0031] In practical use: A hot nozzle base 51 is installed at the bottom of the diverter plate 1. A hot nozzle positioning pin 52 is installed on the surface of the hot nozzle base 51. The hot nozzle body 45 is inserted into the hot nozzle base 51 and fixed by the hot nozzle positioning pin 52. A positioning block 53 is installed inside the hot nozzle head 46. The valve needle 42 is inserted into the positioning block 53 to ensure the stability of the valve needle 42 and prevent it from shifting inside the hot nozzle head 46, which could lead to leakage.

[0032] Please see Figure 1 , Figure 2 The heating tube 6 is installed inside the mounting slot 3. The heating tube 6 is arranged around the hot flow channel 2. A connector 7 is installed on one side of the flow divider 1. The connector 7 is connected to both ends of the heating tube 6.

[0033] In practical use: The heating tube 6 is installed inside the mounting slot 3. When the connector 7 is powered on, the heating tube 6 generates heat to heat the manifold 1, ensuring the fluidity of the injection molten material inside the hot runner 2.

[0034] Please see Figure 2 A nozzle 8 is installed in the middle of the manifold 1, and the nozzle 8 is connected to the hot runner 2.

[0035] In practical use: An injection nozzle 8 is installed in the middle of the manifold 1. The injection molten material flows into the hot runner 2 through the injection nozzle 8 to realize the supply of injection molten material.

[0036] Please see Figure 1 , Figure 2 The actuating device 44 includes a cylinder 9 disposed on the top of the valve seat 43, the cylinder 9 having a telescopic end connected to the valve seat 43.

[0037] In practical use: The pushing device 44 includes a cylinder 9 set on the top of the valve seat 43. When the cylinder 9 pushes the valve needle 42 to move into the hot nozzle 46, the hot nozzle 46 is sealed by the valve needle 42. When the cylinder 9 drives the valve needle 42 to move out of the hot nozzle 46, it is convenient to discharge material for injection molding.

[0038] Please see Figure 2 The valve needle 42 is made of hard alloy, and the bottom of the hot nozzle 46 is fitted with a hot nozzle heat insulation cap 10.

[0039] In practical use: the valve needle 42 is made of hard alloy, which gives it good hardness and wear resistance. The heat insulation cap 10 of the hot nozzle is made of metal and uses a hollow design to reduce heat loss while ensuring fast heat conduction. This ensures that the temperature at the front end of the hot nozzle 46 is uniform and that it is not easy to produce quality problems such as stringing.

[0040] A valve sleeve 41 is installed inside the hot runner 2. A valve needle 42 is inserted and connected inside the valve sleeve 41. A valve seat 43 is installed on the top of the valve sleeve 41. When the pushing device 44 pushes the valve seat 43, it causes the valve needle 42 inside the valve sleeve 41 to move inside the hot nozzle body 45. The valve needle 42 retracts into the valve sleeve 41, causing the hot nozzle head 46 to open, so that the injection molten material can be ejected from the hot nozzle head 46 to achieve casting. In this casting assembly 4, the valve sleeve 41, valve needle 42, hot nozzle body 45 and hot nozzle head 46 are all separate components. The components are designed for easy disassembly and disassembly, facilitating the processing of dead corners and polishing, thus reducing costs. A hot nozzle base 51 is installed at the bottom of the diverter plate 1, and a hot nozzle positioning pin 52 is installed on the surface of the hot nozzle base 51. The hot nozzle body 45 is inserted into the hot nozzle base 51 and fixed by the hot nozzle positioning pin 52. A positioning block 53 is installed inside the hot nozzle head 46, and the valve needle 42 is inserted into the positioning block 53 to ensure the stability of the valve needle 42's movement and prevent displacement inside the hot nozzle head 46 that could lead to leakage.

[0041] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hot runner valve needle structure, characterized in that, include: A flow divider (1) is provided inside the flow divider (1), and mounting grooves (3) are provided on the surface and bottom of the flow divider (1). The casting assembly (4) includes a valve sleeve (41) installed inside the hot runner (2), a valve needle (42) is inserted inside the valve sleeve (41), a valve seat (43) is installed on the top of the valve sleeve (41), a pushing device (44) is provided on the top of the valve seat (43), a hot nozzle body (45) is installed on the bottom of the valve sleeve (41), a hot nozzle head (46) is installed on the bottom of the hot nozzle body (45), and the valve needle (42) is inserted inside the hot nozzle head (46). The positioning component (5) includes a hot nozzle base (51) installed at the bottom of the diverter plate (1), a hot nozzle positioning pin (52) is installed on the surface of the hot nozzle base (51), the hot nozzle body (45) is inserted inside the hot nozzle base (51) and fixed by the hot nozzle positioning pin (52), a positioning block (53) is fixedly installed inside the hot nozzle head (46), and the valve needle (42) is inserted inside the positioning block (53).

2. The hot runner valve needle structure according to claim 1, characterized in that: A heating tube (6) is installed inside the mounting groove (3). The heating tube (6) is arranged around the hot flow channel (2). A connector (7) is installed on one side of the flow divider (1). The connector (7) is connected to both ends of the heating tube (6).

3. The hot runner valve needle structure according to claim 1, characterized in that: The middle part of the flow divider (1) is equipped with an injection nozzle (8), which is connected to the hot runner (2).

4. The hot runner valve needle structure according to claim 1, characterized in that: The pushing device (44) includes a cylinder (9) disposed on the top of the valve seat (43), the cylinder (9) having a telescopic end connected to the valve seat (43).

5. A hot runner valve needle structure according to claim 1, characterized in that: The valve needle (42) is made of hard alloy.

6. The hot runner valve needle structure according to claim 1, characterized in that: The bottom of the hot nozzle (46) is fitted with a hot nozzle heat insulation cap (10).

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