Hot runner device

Abstract

The utility model relates to a hot runner device in the field of hot runners, which comprises a splitter plate, a main nozzle and a plurality of hot nozzles, the main nozzle is arranged on the splitter plate, each hot nozzle head consists of a nozzle body, a nozzle head and a nozzle core, a mounting hole for placing the nozzle core is formed in the nozzle head, a plurality of clamping grooves are formed in the mounting hole, and the nozzle core is arranged in the clamping grooves. The nozzle core is detachably mounted in a mounting hole of the nozzle head through a protrusion, one end of the nozzle body is connected with the bottom of the splitter plate, the nozzle body is sleeved with a heating sleeve, a sleeving end is formed in the heating sleeve, and the space between the sleeving end and the heating sleeve is filled with a heating assembly. According to the hot nozzle head, the nozzle core can be conveniently disassembled and assembled, so that the nozzle core can be conveniently replaced according to the form of an injection molding sprue, the applicability and the practicability of the hot nozzle head are improved, the nozzle body is sleeved with the heating sleeve, the heating sleeve is filled with the heating assembly, the fluidity and the stability of molten materials are ensured, and the forming quality and the production efficiency of products are improved.

Description

Technical Field

[0001] The utility model relates to the field of hot runners, in particular to a hot runner device. Background Art

[0002] Molds are indispensable tools in the plastic molding process. Their design accuracy and performance directly affect the quality and production efficiency of plastic products. Hot runner systems are usually used in injection molds. As a key component, hot runner systems are of great significance for controlling the molten state of plastics, ensuring molding accuracy and reducing material waste. In injection molds, the use of hot runner systems can significantly reduce waste caused by material cooling and improve the surface quality of products.

[0003] As the name implies, the hot runner system refers to a system set up in the injection mold for transferring and controlling the temperature of molten plastic materials. It is mainly composed of components such as hot nozzles, manifolds, and temperature control devices. By constructing a closed flow channel inside the mold, the molten plastic can flow while maintaining a certain temperature, thereby achieving continuous and efficient injection molding production. At the same time, since the molten plastic remains in a flowing state in the flow channel, the material residue when the mold is opened is reduced, thereby reducing the cost of cleaning and maintenance. The hot runner system can not only control problems such as product weld marks and deformation, but also make the product inlet beautiful, thereby improving product quality.

[0004] However, the existing hot runner system still has certain defects in structure and use. Specifically, the molten plastic flows into the corresponding nozzle head through the branch channel, and is then injected by the nozzle head. The existing nozzle head is usually also provided with a heating ring mounted on the outer side of the nozzle head to improve the fluidity of the molten plastic. However, the engagement and matching of the groove surrounding the outer side of the existing nozzle head and the heating ring must ensure the accurate opening of the groove. The processing cost and processing accuracy of the groove surrounding the outer side of the nozzle head are difficult to control, which affects the use. In addition, there are certain differences in the formation of gates used for different products, and the existing nozzle head is not easy to disassemble and install, which affects the molding quality and accuracy of the product. Utility Model Content

[0005] The purpose of the utility model is to solve the above defects and provide a hot runner device to solve the technical problems that the heating ring on the outer side of the nozzle head in the above background technology is difficult to install and connect, and the nozzle head is not easy to replace according to the gate method of different products.

[0006] The purpose of the utility model is achieved by the following methods:

[0007] A hot runner device comprises a diverter plate, a main nozzle and a plurality of hot nozzle heads, wherein the main nozzle is arranged on the diverter plate, a diverter channel is arranged in the diverter plate, the main nozzle and the plurality of hot nozzle heads are connected through the diverter channel, the hot nozzle head is composed of a nozzle body, a nozzle head and a nozzle core, a mounting hole for placing the nozzle core is formed inside the nozzle head, a plurality of slots are formed in the mounting hole, the nozzle core is detachably mounted in the mounting hole of the nozzle head through a protrusion, one end of the nozzle body is connected to the bottom of the diverter plate, and a connecting end for installing the nozzle head is formed at the other end of the nozzle body, the mounting hole of the nozzle head and the connecting end of the nozzle body are connected by threads, a heating sleeve is sleeved on the nozzle body, a sleeve end is formed in the heating sleeve, and a heating component is filled between the sleeve end and the heating sleeve.

[0008] Further in the above description, the surface of the nozzle core is in close contact with the connecting end of the nozzle body through a sealing gasket, a first flow channel connected to the branch flow channel is formed inside the nozzle body, and a second flow channel is opened inside the nozzle core, and the second flow channel is coaxially connected to the first flow channel, so that it can ensure that the molten plastic flows into the nozzle core for injection molding, thereby improving the sealing of the connection between the nozzle core and the nozzle body.

[0009] Further in the above description, the grooves are distributed in an array along the inner wall of the mounting hole, the protrusions are distributed around the outer surface of the nozzle core, and the protrusions are matched with the grooves for snap connection. Through the matching snap connection between the protrusions and the grooves, the nozzle core can be easily disassembled and installed, so that the corresponding nozzle core can be replaced according to the gate methods of different products, thereby improving the applicability and practicality of the nozzle head.

[0010] Further in the above description, the heating assembly is composed of a heating ring and a filler, the heating ring is spirally distributed along the outer surface of the sleeve end, the filler is filled between the heating sleeve and the sleeve end, a connecting hole for electrical connection of the heating ring is opened on the side of the heating sleeve, a mounting protrusion is formed at the end of the nozzle body, the heating sleeve and the mounting protrusion are connected by threads, and the setting of the heating sleeve makes it convenient to connect and install with the nozzle body, and under the sealed sleeve of the heating sleeve, the heating of the nozzle body can be enhanced by the heating ring and the filler, thereby reducing the temperature loss during the injection molding process and improving the fluidity of the plastic.

[0011] Further in the above description, a heating groove is provided on the surface of the diverter plate, a heating ring is installed in the heating groove, and a temperature sensing line for detecting the surface temperature of the diverter plate is connected to the surface of the diverter plate. The heating ring is provided to heat the diverter channel to prevent the plastic from cooling in the diverter channel, thereby improving the molding quality and fluidity of the plastic.

[0012] Further in the above description, a mounting groove is opened around the side of the diverter plate, and a cooling water pipe is connected to the mounting groove through a positioning buckle. The end of the cooling water pipe extends toward the hot nozzle head. The cooling water pipe can be used to cool the diverter plate, thereby facilitating precise control according to the needs of the plastic.

[0013] Further in the above description, an injection hole is opened on the surface of the diverter plate, and the main nozzle is installed on the separation plate by bolts and is connected with the injection hole on the diverter plate.

[0014] The beneficial effects of the utility model are as follows: the nozzle core is matched and connected with the slot in the nozzle head through the protrusion, and the connecting end of the nozzle body and the nozzle head is connected by a threaded connection, which is convenient for disassembly and replacement of the nozzle head, and the nozzle core can be easily disassembled and installed, which not only facilitates the replacement and maintenance of the nozzle core, but also enhances the structural stability and durability of the nozzle core through the contact between the connecting end of the nozzle body and the nozzle core. The convenient disassembly and assembly design of the nozzle core allows it to be conveniently replaced according to the form of the injection molding gate, thereby improving the applicability and practicality of the hot nozzle head and further improving the production efficiency. By sleeve-connecting the heating sleeve on the nozzle body, the heating sleeve can be conveniently disassembled and installed according to needs, and the heating component is filled in the heating sleeve, so that the hot nozzle head can maintain a constant temperature during operation, thereby ensuring the fluidity and stability of the molten material, avoiding problems such as material blockage or poor flow due to temperature changes, and improving the molding quality and production efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the first direction of this embodiment;

[0016] Figure 2 It is a three-dimensional diagram of the second direction of this embodiment;

[0017] Figure 3 is a cross-sectional view of this embodiment;

[0018] Figure 4 This is a schematic diagram of the structure of the nozzle head in this embodiment;

[0019] The reference numerals in the figure are: 1-diverter plate, 2-main nozzle, 3-diverter channel, 4-nozzle body, 5-nozzle head, 6-nozzle core, 7-mounting hole, 8-card slot, 9-connecting end, 10-heating sleeve, 11-sleeve end, 12-sealing gasket, 13-first flow channel, 14-second flow channel, 15-heating ring, 16-filler, 17-heating ring, 18-temperature sensing wire, 19-mounting groove, 20-cooling water pipe, 21-injection hole, 22-connecting hole, 23-protrusion. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] In this embodiment, refer to Figure 1-Figure 4A hot runner device specifically implemented therein comprises a manifold plate 1, a main nozzle 2 and two hot nozzle heads, the main nozzle 2 being arranged on the manifold plate 1, a manifold 3 being arranged in the manifold plate 1, the main nozzle 2 and the two hot nozzle heads being communicated with each other through the manifold 3, the hot nozzle head being composed of a nozzle body 4, a nozzle head 5 and a nozzle core 6, a mounting hole 7 for placing the nozzle core 6 being formed inside the nozzle head 5, a card slot 8 being provided in the mounting hole 7, the nozzle core 6 being detachably mounted in the mounting hole 7 of the nozzle head 5 through a protrusion 23, one end of the nozzle body 4 being connected to the bottom of the manifold plate 1, and a connecting end 9 for mounting the nozzle head 5 being formed at the other end of the nozzle body 4, the mounting hole 7 of the nozzle head 5 being connected to the connecting end 9 of the nozzle body 4 through a threaded connection, a heating sleeve 10 being sleeved on the nozzle body 4, a sleeve connection end 11 being formed in the heating sleeve 10, and a heating component being filled between the sleeve connection end 11 and the heating sleeve 10.

[0022] In this embodiment, the surface of the nozzle core 6 is in close contact with the connection end 9 of the nozzle body 4 through the sealing gasket 12. A first flow channel 13 connected to the branch flow channel 3 is formed inside the nozzle body 4. A second flow channel 14 is opened inside the nozzle core 6. The second flow channel 14 is coaxially connected to the first flow channel 13, so that the molten plastic can flow into the injection molding of the nozzle core 6, thereby improving the sealing performance of the connection between the nozzle core 6 and the nozzle body 4.

[0023] In this embodiment, the slots 8 are distributed in an array along the inner wall of the mounting hole 7, the protrusions 23 are distributed around the outer surface of the nozzle core 6, and the protrusions 23 are matched with the slots 8 for snap connection. Through the matched snap connection between the protrusions 23 and the slots 8, the nozzle core 6 can be easily disassembled and installed, so that the corresponding nozzle core 6 can be replaced according to the gate methods of different products, thereby improving the applicability and practicality of the nozzle head.

[0024] In this embodiment, the heating assembly is composed of a heating ring 15 and a filler 16. The heating ring 15 is spirally distributed along the outer surface of the sleeve end 11. The filler 16 is filled between the heating sleeve 10 and the sleeve end 11. A connecting hole 22 for electrical connection of the heating ring 15 is opened on the side of the heating sleeve 10. A mounting protrusion 23 is formed at the end of the nozzle body 4. The heating sleeve 10 is connected to the mounting protrusion 23 through a thread. The setting of the heating sleeve 10 makes it convenient to connect and install with the nozzle body 4, and under the sealed sleeve connection of the heating sleeve 10, the heating ring 15 and the filler 16 can enhance the heating of the nozzle body 4, thereby reducing the temperature loss during the injection molding process and improving the fluidity of the plastic.

[0025] The filler 16 in this embodiment is made of polyurethane foam.

[0026] A heating groove is provided on the surface of the manifold 1, and a heating ring 17 is installed in the heating groove. A temperature sensing line 18 for detecting the surface temperature of the manifold 1 is connected to the surface of the manifold 1. The heating ring 17 is provided to heat the manifold 3 to prevent the plastic from cooling in the manifold 3, thereby improving the molding quality and fluidity of the plastic. An installation groove 19 is provided around the side of the manifold 1, and a cooling water pipe 20 is connected to the installation groove 19 through a positioning buckle. The end of the cooling water pipe 20 extends toward the hot nozzle head. The manifold 1 can be cooled only by the cooling water pipe 20, thereby facilitating precise control according to the needs of the plastic. An injection hole 21 is provided on the surface of the manifold 1, and the main nozzle 2 is installed on the separation plate by bolts and is connected to the injection hole 21 on the manifold 1.

[0027] The specific use principle of this embodiment is: the nozzle core 6 is matched and connected with the card groove 8 in the mounting hole 7 through the protrusion 23, so that the nozzle head 5 is connected with the connecting end 9 of the nozzle body 4 by threading through the mounting hole 7, so as to facilitate the disassembly and replacement of the nozzle head 5 and the nozzle core 6. At the same time, the structural stability and durability of the nozzle core 6 are enhanced through the contact between the connecting end 9 of the nozzle body 4 and the sealing gasket 12 of the nozzle core 6. The convenient disassembly and assembly design of the nozzle core 6 makes it possible to conveniently replace it according to the form of the injection molding gate, thereby improving the applicability and practicality of the hot nozzle head and further improving the production efficiency. The heating sleeve 10 is connected with the mounting protrusion 23 of the nozzle body 4 by threading, so that the heating sleeve 10 is convenient to disassemble and install according to needs, and the heating ring 15 and polyurethane foam are filled in the heating sleeve 10. One end of the heating ring 15 passes through the connecting hole 22 and is connected to the external power supply, so that the hot nozzle head can maintain a constant temperature during operation, thereby ensuring the fluidity and stability of the molten material, avoiding problems such as material blockage or poor flow caused by temperature changes, and improving the molding quality and production efficiency of the product.

[0028] The above is only a preferred embodiment of the utility model, and does not constitute any form of limitation to the utility model. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the utility model, which do not depart from the content of the technical solution of the utility model, are within the scope of the technical solution of the utility model.

Claims

1. A hot runner device, comprising a manifold, a main nozzle and a plurality of hot nozzle heads, wherein the main nozzle is arranged on the manifold, a manifold is arranged in the manifold, and the main nozzle and the plurality of hot nozzle heads are connected through the manifold, characterized in that: The hot nozzle head is composed of a nozzle body, a nozzle head and a nozzle core. A mounting hole for placing the nozzle core is formed inside the nozzle head, and a plurality of slots are provided in the mounting hole. The nozzle core is detachably mounted in the mounting hole of the nozzle head through a protrusion. One end of the nozzle body is connected to the bottom of the diverter plate, and a connecting end for mounting the nozzle head is formed at the other end of the nozzle body. The mounting hole of the nozzle head and the connecting end of the nozzle body are connected by threads. A heating sleeve is sleeved on the nozzle body, a sleeve connection end is formed in the heating sleeve, and a heating component is filled between the sleeve connection end and the heating sleeve.

2. A hot runner device according to claim 1, characterized in that: The surface of the nozzle core is in close contact with the connecting end of the nozzle body through a sealing gasket, a first flow channel connected to the branch flow channel is formed inside the nozzle body, and a second flow channel is opened inside the nozzle core, and the second flow channel is coaxially connected to the first flow channel.

3. A hot runner device according to claim 1, characterized in that: The clamping grooves are distributed in an array along the inner wall of the mounting hole, the protrusions are distributed around the outer surface of the nozzle core, and the protrusions are matched with the clamping grooves for buckle connection.

4. A hot runner device according to claim 1, characterized in that: The heating assembly is composed of a heating ring and a filler. The heating ring is distributed in a spiral along the outer surface of the sleeve end. The filler is filled between the heating sleeve and the sleeve end. A connecting hole for electrical connection of the heating ring is provided on the side of the heating sleeve. A mounting protrusion is formed at the end of the nozzle body. The heating sleeve and the mounting protrusion are connected by threads.

5. A hot runner device according to any one of claims 1 to 4, characterized in that: A heating groove is provided on the surface of the diverter plate, a heating ring is installed in the heating groove, and a temperature sensing line for detecting the surface temperature of the diverter plate is connected to the surface of the diverter plate.

6. A hot runner device according to any one of claims 1 to 4, characterized in that: A mounting groove is formed around the side of the diverter plate, a cooling water pipe is connected to the mounting groove via a positioning buckle, and the end of the cooling water pipe extends toward the hot nozzle head.

7. A hot runner device according to any one of claims 1 to 4, characterized in that: An injection hole is provided on the surface of the diverter plate, and the main nozzle is installed on the separation plate through bolts and is communicated with the injection hole on the diverter plate.

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