A hot runner nozzle with cooling function

Abstract

The present invention relates to the field of hot runner technology, and in particular to a hot runner nozzle with a cooling function, comprising a body and a plurality of nozzle cores, wherein the body is provided with a molding groove and a plurality of spray holes, the ends of the plurality of spray holes are respectively arranged at an angle and are all connected to the molding groove, the nozzle core is installed in the spray hole and is used to inject into the molding groove, and the body is also provided with at least two water channels, which are respectively located on both sides of the spray hole and are interconnected with the body; the water channels are used to connect with an external water source. The present invention is provided with interconnected water channels in the body, which are connected with an external water source through the water channels, so that when the present invention needs to cool down, water can flow through the interior of the body to cool down the nozzle core, thereby ensuring the efficiency of cooling down.

Description

Technical Field

[0001] The present invention relates to the technical field of hot runners, in particular to a hot runner nozzle with a cooling function. Background Art

[0002] Compared to traditional injection molding techniques, hot runner technology offers advantages such as high energy efficiency and environmental friendliness, making it increasingly popular within the injection molding industry. In hot runner injection molding, the nozzle is a core component, working in conjunction with the nozzle core to eject molten material into the molding groove for product injection. However, due to the high injection temperatures, even after the product is cooled after injection, the material inside the nozzle remains molten, as current nozzles lack a cooling function. This delays cooling and leaves the material and product connected (also known as the breakpoint, where the nozzle core exits), compromising product quality. Summary of the Invention

[0003] In view of the problems in the prior art, the present invention provides a hot runner nozzle with a cooling function, which can quickly cool the raw materials inside the nozzle core.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a hot runner nozzle with a cooling function, comprising a main body and a plurality of nozzle cores, wherein the main body is provided with a molding groove and a plurality of spray holes, the ends of the plurality of spray holes are all connected to the molding groove, the nozzle core is obliquely installed in the spray hole and is used for injecting into the molding groove, the main body is also provided with at least two water channels, which are respectively located on both sides of the spray hole, and the water channels are interconnected with the main body; the water channels are used to connect with an external water source.

[0006] Furthermore, the top of the forming groove is connected to a fixing hole, the fixing hole passes through the top of the body, and a fixing piece is assembled in the fixing hole.

[0007] Furthermore, the water passages are all communicated with the side walls of the fixing holes, and the side walls of the fixing members are provided with a relief portion, and a gap for water flow to pass through is formed between the relief portion and the fixing holes.

[0008] Preferably, the fixing member is provided with two waterproof grooves, which are respectively located above and below the yielding portion, and waterproof rings are installed in the waterproof grooves, which are in contact with the main body.

[0009] Furthermore, along the axial direction of the fixing member, the fixing member is provided with an exhaust hole, and the exhaust hole is used to communicate with the forming groove; the exhaust hole is detachably provided with an air blocking member.

[0010] Furthermore, a hanging pin is provided on the inner side wall of the spray hole; when the nozzle core is installed in the spray hole, the nozzle core is installed on the hanging pin.

[0011] Furthermore, the nozzle core includes a core body and a spray part, the spray part is obliquely arranged on the core body, and the spray part is provided with a hanging groove; when the core body is installed in the spray hole, the hanging pin is assembled in the hanging groove to fix the spray part.

[0012] Preferably, the core is mounted in the spray hole by screws.

[0013] Preferably, there are two hanging pins, which are arranged opposite to each other, and hanging pieces are respectively provided on both sides of the injection portion, and the hanging grooves are provided on the hanging pieces.

[0014] The beneficial effects of the present invention are as follows: the present invention is provided with interconnected water channels in the body, which are connected with the external water source through the water channels, so that when the present invention needs to cool down, water can flow through the inside of the body to cool down the mouthpiece, thereby ensuring the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the present invention.

[0016] Figure 2 It is an internal schematic diagram of the present invention.

[0017] Figure 3 Schematic diagram of the fixing member of the present invention.

[0018] Figure 4 Schematic diagram of the mouthpiece of the present invention.

[0019] Figure 5 for Figure 4 Enlarged view of point A.

[0020] Figure 6 The figure numbers of the schematic diagram of the present invention when it is matched with the fixing seat are: 1-main body, 2-mouth core, 3-fixing piece, 4-fixing seat, 11-molding groove, 12-spray hole, 13-water channel, 14-fixing hole, 15-hanging pin, 21-core, 22-spraying part, 31-yielding part, 32-waterproof groove, 33-exhaust hole, 34-gas blocking piece, 42-water outlet, 221-hanging piece, 222-hanging groove. DETAILED DESCRIPTION

[0021] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 6As shown, the present invention provides a hot runner nozzle with a cooling function, comprising a body 1 and a plurality of nozzle cores 2. The body 1 is provided with a molding groove 11 and a plurality of spray holes 12. The ends of the plurality of spray holes 12 are all connected to the molding groove 11. The nozzle core 2 is obliquely installed in the spray hole 12 and is used for injecting into the molding groove 11. The body 1 is also provided with at least two water channels 13, which are respectively located on both sides of the spray hole 12 and are connected to the body 1. The water channels 13 are used to communicate with an external water source.

[0023] The present invention is mounted on a mounting base 4, which is made of a heat-insulating material to reduce heat loss from the raw materials. The mounting base 4 is provided with a mounting hole, into which the body 1 is mounted, with a water-permeable gap between the body 1 and the mounting hole 14. During operation, the nozzle core 2 is mounted within the spray hole 12, with the output end of the nozzle core 2 tiltedly aligned with the forming groove 11, located at the connection point between the spray hole 12 and the forming groove 11. During injection molding, the molten raw material is sprayed into the molding groove 11 through the output end of the nozzle core 2, and the raw material will flow into the molding groove 11 and be filled with the shape of the molding groove 11; and when the injection molding is completed and the product is cooled, the water outlet 42 of the external water source well fixing seat 4 flows into the body 1 surrounded by the body 1 to cool the product injection molded in the body 1. Since the body 1 is provided with a water channel 13, water will also flow into the body 1 through the water channel 13, thereby cooling the nozzle core 2 located between the two water channels 13, ensuring that the product and the raw material in the nozzle core 2 are cooled at the same time, so that the product can be disconnected from the nozzle core 2 after demolding without leaving any residue, thereby ensuring the quality of the product.

[0024] In this embodiment, a fixing hole 14 is provided at the top of the body, which is connected to the top of the molding groove 11. A fixing member 3 is assembled in the fixing hole 14. The fixing member 3 is used to connect the present invention with other components belonging to the same hot runner system, thereby ensuring the stability of the present invention.

[0025] Specifically, the water channels 13 are all connected to the side walls of the fixing holes 14, and a clearance portion 31 is provided around the side walls of the fixing member 3 corresponding to the position of the water channels 13. A gap is formed between the clearance portion 31 and the fixing holes 14 for water to flow through, thereby ensuring the connection between the multiple water channels 13.

[0026] Preferably, the fixing member 3 is provided with two waterproof grooves 32, which are respectively located above and below the yield portion 31. A waterproof ring (not marked in the figure) is installed in the waterproof groove 32. The waterproof ring is in contact with the main body 1, preventing water from overflowing through the gap between the fixing member 3 and the fixing hole 14, thereby ensuring the sealing performance of the present invention.

[0027] Specifically, due to thermal expansion and contraction, the air pressure inside the molding groove 11 can easily differ from that outside after the product cools, thus affecting product demolding. Therefore, in this embodiment, a vent hole 33 is provided along the length of the fixing member 3. The vent hole 33 is used to communicate with the molding groove 11. A gas blocking member 34 is removably installed in the vent hole 33. The gas blocking member 34 can be removed and installed to connect or block the molding groove 11 with the outside world.

[0028] In current hot runner technology, since the nozzle core 2 needs to be tilted during injection molding, threads are generally used to secure the nozzle core 2 within the nozzle orifice 12 to prevent it from shaking. While nozzle cores 2 are often positioned at an angle between the core body 21 and the ejection portion 22, the prior art typically secures the nozzle core 2 by threading the core body 21 into the nozzle orifice 12. This approach, however, is difficult to secure due to the structure of the ejection portion 22. To address this technical issue, in this embodiment, a hook pin 15 is provided on the inner sidewall of the nozzle orifice 12. When the nozzle core 2 is installed in the nozzle orifice 12, it is attached to the hook pin 15. By hooking the ejection portion 22 to the hook pin 15, the nozzle core 2 is secured, ensuring a stable position and preventing shaking, while also avoiding the impact of threaded connections that could affect the installation of the nozzle core 2.

[0029] The specific coordination between the nozzle core 2 and the nozzle orifice 12 in this embodiment is as follows: the nozzle core 2 comprises a core body 21 and a spray portion 22, which is tilted relative to the core body 21 and provided with a hanging groove 222. When the core body 21 is installed in the nozzle orifice 12, a hanging pin 15 fits within the hanging groove 222 to secure the spray portion 22. Specifically, when installing the nozzle core 2 in the nozzle orifice 12, the nozzle core 2 is simply placed into the nozzle orifice 12, with the hanging pin 15 seated in the hanging groove 222, thereby securing the nozzle core 2. Specifically, the hanging pin 15 is positioned horizontally, meaning that in this embodiment, the hanging pin 15 supports the nozzle core 2 to maintain its position. Furthermore, due to the horizontal positioning of the hanging pin 15, the nozzle core 2 cannot rotate, thereby ensuring that the spray portion 22 always faces the molding groove 11 during injection molding. Preferably, the core body 21 is screwed into the nozzle orifice 12 after being placed therein, further securing the core body 21.

[0030] Preferably, there are two hanging pins 15 and two hanging slots 222, and the two hanging pins 15 are arranged opposite each other. Hangers 221 are respectively provided on both sides of the ejection portion 22, and the hanging slots 222 are provided on the hangers 221. The two hanging pins 15 are used to fix the nozzle core 2, thereby ensuring the balanced positioning of the nozzle core 2.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are all within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A hot runner nozzle with a cooling function, comprising a body and a plurality of nozzle cores, wherein the body is provided with a molding groove and a plurality of spray holes, the ends of the plurality of spray holes are all connected to the molding groove, and the nozzle cores are obliquely installed in the spray holes and are used to inject into the molding groove, characterized in that: The main body is further provided with at least two water channels, the water channels being located on both sides of the spray hole and being interconnected with the main body; the water channels are used to communicate with an external water source; During operation, the nozzle core is installed in the spray hole, and the output end of the nozzle core is tilted and aligned with the molding groove. The output end of the nozzle core is located at the connection point between the spray hole and the molding groove. During injection molding, the molten raw material is sprayed into the molding groove through the output end of the nozzle core. The raw material will flow into the molding groove and be filled with the shape of the molding groove. When the injection molding is completed and the product is cooled, the water outlet of the external water source well fixing seat flows into the body to cool the injection molded product in the body. The body is provided with a water channel, and water will flow into the body through the water channel, thereby cooling the nozzle core located between the two water channels. A fixing hole is provided on the top of the body, the fixing hole is communicated with the top of the forming groove, and a fixing piece is assembled in the fixing hole; The water channels are all connected to the side walls of the fixing holes. A clearance portion is provided on the side walls of the fixing member at positions corresponding to the water channels. A gap is formed between the clearance portion and the fixing holes for water to pass through, so that the multiple water channels are connected. The fixing member is provided with two waterproof grooves, which are respectively located above and below the paving portion, and a waterproof ring is installed in the waterproof groove, which contacts the body; A hanging pin is provided on the inner side wall of the spray hole; when the nozzle core is installed in the spray hole, the nozzle core is installed on the hanging pin; When the nozzle core is installed in the nozzle hole, the nozzle core is installed on the hanging pin; the nozzle part is fixed by hanging it on the hanging pin; The nozzle core includes a core body and a spray part, the spray part is obliquely arranged on the core body, and the spray part is provided with a hanging groove; when the core body is installed in the spray hole, the hanging pin is assembled in the hanging groove to achieve the fixation of the spray part; When installing the nozzle core to the spray hole, the nozzle core is directly placed into the spray hole and the hanging pin is installed in the hanging groove, thereby fixing the nozzle core; the hanging pin is arranged horizontally, and the nozzle core is positioned by supporting the nozzle core with the hanging pin. The nozzle core cannot rotate, so that the injection part is always facing the molding groove to realize injection molding; after the core body is placed in the spray hole, it is installed in the spray hole by screws to achieve fixed installation of the core body.

2. The hot runner nozzle with cooling function according to claim 1, characterized in that: An exhaust hole is provided through the fixing piece along the axial direction of the fixing piece, and the exhaust hole is used to communicate with the forming groove; and a gas blocking piece is detachably installed on the exhaust hole.

3. The hot runner nozzle with cooling function according to claim 1, characterized in that: There are two hanging pins and two hanging slots, and the two hanging pins are arranged opposite to each other. Hanging pieces are respectively arranged on both sides of the spraying part, and the hanging slots are arranged on the hanging pieces.

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