Hot runner injection molding system and charger shell

Abstract

The utility model relates to the technical field of injection molds, in particular to a hot runner injection molding system and a charger shell, which comprise a hot runner mold and a splitter plate arranged in the hot runner mold, the hot runner mold is arranged on the splitter plate, the feeding port is formed in the hot runner mold, the hot runner cavity is formed in the splitter plate, the electric heating bar is arranged in the hot runner cavity, the hot flow pipeline is spirally wound on the electric heating bar, the discharging pipeline is arranged at the bottom of the splitter plate, and the nozzle is arranged at a discharging port of the discharging pipeline. The other end of the hot flow pipeline is communicated with a discharging pipeline, and an electric heating wire is wound on the outer side of the discharging pipeline, so that the problem that raw materials are solidified midway due to the fact that the raw materials are not heated thoroughly in a short time in the pipeline is solved; and meanwhile, the electric heating wire is wound on the discharging pipeline, thorough heating in the runner can be guaranteed, excessive heat cannot be lost when the raw materials flow through the discharging pipeline, the injection molding stability is guaranteed, and the production efficiency is effectively improved.

Description

Technical Field:

[0001] The utility model relates to the technical field of injection molds, in particular to a hot runner injection system and a charger housing. Background Art:

[0002] In recent years, with the development of injection molding technology, hot runner technology has been widely used in injection molds. A hot runner refers to a heating component system used in an injection mold to inject molten plastic particles into the cavity of the mold. A hot runner mold is a brand-new structure in which the runners and sprue of a traditional mold or a three-plate mold are heated, and the runners and sprue do not need to be removed during each molding. Since hot runner molds have a shorter molding cycle than traditional molds and save more raw materials, they are involved in multiple fields such as electronics, automobiles, medical treatment, daily necessities, toys, packaging, construction, and office equipment. Most of the hot runner pipes inside existing general molds are straight pipes or U-shaped pipes. The raw materials in the straight pipes flow relatively fast under the action of gravity, with a short heating time and incomplete heating. While the U-shaped pipes require the action of extrusion equipment to ensure the flow of injection molding raw materials in the pipes, which increases the cost and cannot meet the usage requirements. After the pipes are heated to a sufficient temperature in the manifold, when reaching the nozzle, the heat is easily lost, resulting in insufficient injection temperature, slow molding of injection products, and affecting production efficiency. Content of the Utility Model:

[0003] The purpose of the utility model is to provide a hot runner injection system aiming at the deficiencies of the existing technology, which can ensure thorough heating in the runner and will not lose too much heat during discharging, ensure the stability of injection molding, and effectively improve production efficiency;

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a hot runner injection system, including a hot runner mold, a manifold arranged in the hot runner mold, and further including a feeding port arranged on the hot runner mold, a hot runner cavity arranged in the manifold, an electric heating rod arranged in the hot runner cavity, a hot runner pipe spirally wound around the electric heating rod, a blanking pipe arranged at the bottom of the manifold, and a nozzle arranged at the discharging port of the blanking pipe. One end of the hot runner pipe is communicated with the feeding port, the other end of the hot runner pipe is communicated with the blanking pipe, and an electric heating wire is also wound around the outside of the blanking pipe.

[0005] For further improvement of the above solution, the electric heating wire is spirally and evenly wound on the outer surface of the blanking pipe, and the connection end of the electric heating wire extends out of the hot runner mold.

[0006] A further improvement to the above solution is that the hot runner mold includes a panel, a support plate disposed below the panel, an upper mounting groove disposed at the bottom of the panel, and a lower mounting groove disposed above the support plate. The manifold is disposed between the upper mounting groove and the lower mounting groove.

[0007] A further improvement to the above solution is that heat insulation pads are provided between the upper and lower ends of the manifold and the panel and the support plate respectively.

[0008] A further improvement to the above solution is that a sprue bushing communicating with the hot runner cavity is provided at the top of the manifold. An installation hole penetrating through the panel vertically is provided on the panel, and a locating ring is provided at the top of the installation hole. The top of the sprue bushing penetrates into the installation hole and corresponds to the locating ring.

[0009] A further improvement to the above solution is that a heat preservation pad is provided inside the hot runner cavity.

[0010] A further improvement to the above solution is that a temperature sensor is provided on one side of the electric heating rod, and the temperature sensor is connected to the hot runner mold by screws.

[0011] A further improvement to the above solution is that a sealing assembly is provided at the feeding port. The sealing assembly includes a feeding pipe disposed above the feeding port and a sealing rubber ring disposed at the connection between the feeding pipe and the feeding port.

[0012] A further improvement to the above solution is that internal threads are provided on the inner side wall of the upper end of the feeding port, and external threads are provided on the outer side wall of the lower end of the feeding pipe. The feeding pipe and the feeding port are connected by screw threads.

[0013] On the other hand, the present utility model provides a charger housing obtained by using the hot runner injection molding system described in any one of the above.

[0014] The beneficial effects of the present utility model are as follows: It includes a hot runner mold, a manifold plate disposed within the hot runner mold, and further includes a feeding port disposed on the hot runner mold, a hot runner cavity disposed within the manifold plate, an electric heating rod disposed within the hot runner cavity, a hot runner pipe spirally wound around the electric heating rod, a blanking pipe disposed at the bottom of the manifold plate, and a nozzle disposed at the discharge port of the blanking pipe. One end of the hot runner pipe communicates with the feeding port, and the other end of the hot runner pipe communicates with the blanking pipe. An electric heating wire is also wound around the outside of the blanking pipe. The hot runner pipe is wound around the surface of the electric heating rod, increasing the contact area between the hot runner pipe and the electric heating rod, making the hot runner pipe heat more evenly and durably, thereby ensuring that the raw material does not solidify during flow, solving the problem that the raw material is not thoroughly heated in the pipe in a short time, resulting in the solidification of the raw material midway; at the same time, an electric heating wire is wound around the blanking pipe, which can ensure thorough heating in the runner and prevent excessive heat loss when the raw material flows through the blanking pipe, ensuring the stability of injection molding and effectively improving production efficiency. Description of the Drawings:

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] Figure 2 It is a cross-sectional view of the upper part of the hot runner mold of the present utility model.

[0017] Description of the Reference Numerals: Hot runner mold 1, panel 12, mounting hole 121, locating ring 122, upper mounting groove 123, support plate 13, lower mounting groove 131, manifold plate 2, sprue bushing 21, heat insulation pad 22, feeding port 23, hot runner cavity 24, electric heating rod 25, temperature sensor 26, hot runner pipe 27, blanking pipe 28, nozzle 29, heat preservation pad 3, sealing assembly 4, feeding pipe 41, sealing rubber ring 42, electric heating wire 5. Detailed Embodiment:

[0018] The following further describes the present utility model in conjunction with the drawings, as Figure 1-2As shown in the figure, the utility model relates to a hot runner injection molding system, which includes a hot runner mold 1 and a manifold 2 arranged inside the hot runner mold 1. It also includes a feeding port 23 arranged on the hot runner mold 1, a hot runner cavity 24 arranged inside the manifold 2, an electric heating rod 25 arranged inside the hot runner cavity 24, a hot runner pipe 27 spirally wound around the electric heating rod 25, a blanking pipe 28 arranged at the bottom of the manifold 2, and a nozzle 29 arranged at the discharge port of the blanking pipe 28. One end of the hot runner pipe 27 is communicated with the feeding port 23, and the other end of the hot runner pipe 27 is communicated with the blanking pipe 28. An electric heating wire 5 is also wound around the outside of the blanking pipe 28. The hot runner pipe 27 is wound on the surface of the electric heating rod 25, increasing the contact area between the hot runner pipe 27 and the electric heating rod 25, making the hot runner pipe 27 heat more evenly and lastingly, so as to ensure that the raw material will not solidify during flow, solving the problem that the raw material is not thoroughly heated in a short time in the pipeline, resulting in the solidification of the raw material midway; at the same time, the electric heating wire 5 is wound around the blanking pipe 28, which can ensure thorough heating in the runner and the raw material will not lose too much heat when flowing through the blanking pipe 28, ensuring the stability of injection molding and effectively improving production efficiency.

[0019] The electric heating wire 5 is spirally and evenly wound on the outer surface of the blanking pipe 28, and the wiring end of the electric heating wire 5 extends out to the outside of the hot runner mold 1. The electric heating wire 5 is spirally arranged outside the blanking pipe 28, improving the contact area with the blanking pipe 28 and being able to ensure the injection molding temperature during blanking.

[0020] The hot runner mold 1 includes a panel 12, a support plate 13 arranged below the panel 12, an upper installation groove 123 arranged at the bottom of the panel 12, and a lower installation groove 131 arranged above the support plate 13. The manifold 2 is arranged between the upper installation groove 123 and the lower installation groove 131.

[0021] Heat insulation pads 22 are arranged between the upper and lower ends of the manifold 2 and the panel 12 and the support plate 13 respectively, effectively preventing the heat loss of the hot runner cavity 24 inside the manifold 2, so as to ensure that the raw material will not solidify during flow.

[0022] A sprue bushing 21 communicated with the hot runner cavity 24 is arranged at the top of the manifold 2. An installation hole 121 penetrating up and down is opened on the panel 12. A locating ring 122 is arranged at the top of the installation hole 121. The top of the sprue bushing 21 penetrates into the installation hole 121 and corresponds to the locating ring 122.

[0023] A heat preservation pad 3 is arranged inside the hot runner cavity 24 to maintain the temperature inside the hot runner cavity 24 and prevent the temperature drop caused by heat loss during the injection molding process from affecting the injection molding.

[0024] On one side of the electric heating rod 25, a temperature sensor 26 is provided, and the temperature sensor 26 is connected to the hot runner mold 1 by screws. During the injection molding process, environmental influences may cause a deviation between the internal temperature of the hot runner cavity 24 and the preset temperature, and this cannot be known in time, thus affecting the processing. With the help of the temperature sensor 26, the internal temperature of the hot runner cavity 24 can be detected, and then measures can be taken in time for adjustment to ensure the stable progress of injection molding.

[0025] A sealing assembly 4 is provided at the feeding port 23. The sealing assembly 4 includes a feeding pipeline 41 arranged above the feeding port 23 and a sealing rubber ring 42 arranged at the connection between the feeding pipeline 41 and the feeding port 23. The raw material enters the feeding port 23 from the feeding pipeline 41, and the sealing rubber ring 42 prevents the raw material from leaking from the connection.

[0026] Internal side walls at the upper end of the feeding port 23 are provided with threads, and the outer side walls at the lower end of one side of the feeding pipeline 41 are provided with threads. The feeding pipeline 41 and the feeding port 23 are connected by thread fitting, and the feeding pipeline 41 and the feeding port 23 are detachably connected, which is convenient for maintenance.

[0027] On the other hand, the present utility model provides a charger shell, which is prepared by using the hot runner injection molding system of any one of the above.

[0028] Working principle:

[0029] The present utility model includes a hot runner mold 1, a manifold plate 2 arranged in the hot runner mold 1, and further includes a feeding port 23 arranged on the hot runner mold 1, a hot runner cavity 24 arranged in the manifold plate 2, an electric heating rod 25 arranged in the hot runner cavity 24, a hot runner pipeline 27 spirally wound around the electric heating rod 25, a blanking pipeline 28 arranged at the bottom of the manifold plate 2, and a nozzle 29 arranged at the discharge port of the blanking pipeline 28. One end of the hot runner pipeline 27 is communicated with the feeding port 23, and the other end of the hot runner pipeline 27 is communicated with the blanking pipeline 28. An electric heating wire is also wound around the outside of the blanking pipeline 28. The hot runner pipeline 27 is wound on the surface of the electric heating rod 25, increasing the contact area between the hot runner pipeline 27 and the electric heating rod 25, making the hot runner pipeline 27 receive heat more evenly and lastingly, thus ensuring that the raw material will not solidify during flow, solving the problem that the raw material is not heated thoroughly in a short time in the pipeline, resulting in the solidification of the raw material midway; at the same time, an electric heating wire is wound around the blanking pipeline 28, which can ensure complete heating in the runner, and the raw material will not lose too much heat when flowing through the blanking pipeline 28, ensuring the stability of injection molding and effectively improving the production efficiency.

[0030] Certainly, the above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present utility model are included in the scope of the patent application of the present utility model.

Claims

1. A hot runner injection molding system, comprising a hot runner mold (1) and a manifold (2) disposed in the hot runner mold (1), characterized in that: It also includes a feed port (23) arranged on the hot runner mold (1), a hot runner cavity (24) arranged in the diverter plate (2), an electric heating rod (25) arranged in the hot runner cavity (24), a hot flow pipe (27) spirally wound around the electric heating rod (25), a discharge pipe (28) arranged at the bottom of the diverter plate (2), and a nozzle (29) arranged at the discharge port of the discharge pipe (28), one end of the hot flow pipe (27) is connected to the feed port (23), and the other end of the hot flow pipe (27) is connected to the discharge pipe (28), and a heating wire (5) is also wound around the outer side of the discharge pipe (28).

2. A hot runner injection molding system according to claim 1, characterized in that: The heating wire (5) is spirally wound evenly on the outer surface of the discharge pipe (28), and the connection end of the heating wire (5) extends to the outside of the hot runner mold (1).

3. A hot runner injection molding system according to claim 1, characterized in that: The hot runner mold (1) comprises a panel (12), a support plate (13) arranged below the panel (12), an upper mounting groove (123) arranged at the bottom of the panel (12), and a lower mounting groove (131) arranged above the support plate (13); the diverter plate (2) is arranged between the upper mounting groove (123) and the lower mounting groove (131).

4. A hot runner injection molding system according to claim 3, characterized in that: Heat insulation pads (22) are provided between the upper and lower ends of the diverter plate (2) and the panel (12) and the support plate (13).

5. A hot runner injection molding system according to claim 3, characterized in that: A sprue sleeve (21) connected to the hot runner cavity (24) is arranged at the top of the manifold (2); a mounting hole (121) extending from top to bottom is opened on the panel (12); a positioning ring (122) is arranged at the top of the mounting hole (121); the top of the sprue sleeve (21) penetrates into the mounting hole (121) and corresponds to the positioning ring (122).

6. A hot runner injection molding system according to claim 1, characterized in that: A heat preservation pad (3) is arranged inside the hot runner cavity (24).

7. A hot runner injection molding system according to claim 1, characterized in that: A temperature sensor (26) is provided on one side of the electric heating rod (25), and the temperature sensor (26) is connected to the hot runner mold (1) via screws.

8. A hot runner injection molding system according to claim 1, characterized in that: The feed port (23) is provided with a sealing assembly (4), and the sealing assembly (4) comprises a feed pipe (41) arranged above the feed port (23), and a sealing rubber ring (42) arranged at the connection between the feed pipe (41) and the feed port (23).

9. A charger housing, characterized in that: It is prepared by using a hot runner injection molding system as described in any one of claims 1-8.

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