Hot channel hot nozzle structure

Abstract

The utility model provides a hot runner hot nozzle structure, including mould, be located in the inside of mould and have the first runner hole's hot nozzle, be located in the copper head of hot nozzle end, the copper head inside is provided with the second runner hole, and the copper head is away from the one end between hot nozzle and mould and is connected with the water jacket of water transportation, the water jacket of water transportation has the cooling water circulation subassembly in the week side, the water jacket of water transportation is provided with the third runner hole inside, to make first runner hole, second runner hole and third runner hole communicate in proper order, the utility model can effectively reduce runner hole export forming temperature, increase forming crystallization rate.

Description

Technical Field

[0001] This utility model relates to the field of hot runner systems, and in particular to a hot runner nozzle structure. Background Technology

[0002] Hot runner systems are heating components used in injection molds to inject molten plastic particles into the mold cavity. Hot runner molds are a novel construction that heats the runners and sprues of traditional or three-plate molds, eliminating the need to remove them after each molding cycle.

[0003] In the application of hot runner technology, the hot nozzle hot runner system is one of the commonly used hot runner systems. However, due to the slow crystallization rate of PET plastic, the difficulty in molding and processing, and the high molding temperature, the existing hot nozzle structure is difficult to achieve the ideal molding effect. Utility Model Content

[0004] The purpose of this invention is to provide a hot runner nozzle structure that can effectively reduce the molding temperature at the outlet of the runner orifice and increase the molding crystallization rate.

[0005] To solve the above-mentioned technical problems, this utility model provides a hot runner nozzle structure, including a mold, a hot nozzle disposed inside the mold and having a first flow channel hole, and a copper head disposed at the end of the hot nozzle. The copper head has a second flow channel hole inside, and a water jacket is connected between the end of the copper head away from the hot nozzle and the mold. The water jacket has a cooling water circulation assembly around its periphery, and a third flow channel hole is opened inside the water jacket so that the first flow channel hole, the second flow channel hole, and the third flow channel hole are connected in sequence.

[0006] Furthermore, a plurality of heating rings are arranged around the outer periphery of the hot nozzle, and a heat insulation sleeve is arranged outside the hot nozzle so that the heating rings are located between the hot nozzle and the heat insulation sleeve.

[0007] Furthermore, a sealing sleeve is provided on the outer periphery of the copper head. The sealing sleeve is threadedly engaged with the hot nozzle, and one end of the sealing sleeve presses against the side of the copper head end for compression.

[0008] Furthermore, a heat insulation cap is provided between the copper head and the water jacket, and a through hole is provided in the middle of the heat insulation cap, and the through hole is located between the second flow channel hole and the third flow channel hole.

[0009] Furthermore, a sealing ring is connected between the sealing sleeve and the water-carrying sleeve, and the outer circumference of the sealing ring is in an interference fit with the water-carrying sleeve, while the inner circumference of the sealing ring is in an interference fit with the sealing sleeve.

[0010] Furthermore, the cooling water circulation assembly includes an inlet channel and an outlet channel respectively opened on both sides of the mold, and a cooling cavity is opened between the inlet channel and the outlet channel, with the outer periphery of the water jacket located in the cooling cavity.

[0011] Furthermore, a first sealing ring and a second sealing ring are spaced apart between the outer periphery of the water jacket and the mold, and the first sealing ring and the second sealing ring are respectively placed on both sides of the cooling cavity.

[0012] Furthermore, a retaining ring is snapped onto the outer periphery of the hot nozzle, and the end of the heat insulation sleeve abuts against the retaining ring.

[0013] Furthermore, a water-carrying jacket pressing block is arranged inside the mold, and a water-carrying jacket base is provided between the water-carrying jacket pressing block and the water-carrying jacket, so that the water-carrying jacket pressing block can position the water-carrying jacket through the water-carrying jacket base.

[0014] Furthermore, the water jacket base is provided with several lifting holes on the side facing the water jacket pressure block, and the water jacket base and the water jacket are threaded together.

[0015] The beneficial effects of this utility model are as follows: by sequentially connecting the hot nozzle, copper head, and water jacket, the first flow channel hole, the second flow channel hole, and the third flow channel hole are sequentially connected. At this time, the molten PET plastic can flow along the first flow channel hole at the hot nozzle to the third flow channel hole of the water jacket for injection molding. At the same time, due to the cooling water circulation components around the water jacket, the water jacket is cooled by the cooling water in real time, thereby allowing the material temperature inside the water jacket to be rapidly cooled by the cooling water, improving cooling efficiency, shortening the overall cooling time of the PET plastic, thereby accelerating the entire production cycle, and improving the quality and smoothness of the product molding. Attached Figure Description

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

[0017] Reference numerals: 1. Hot nozzle; 2. Insulation sleeve; 3. Heating ring; 4. Copper head; 5. Water jacket pressing block; 6. Water jacket base; 7. First sealing ring; 8. Mold; 9. Sealing sleeve; 10. Water jacket; 11. Insulation cap; 12. Second sealing ring; 13. Sealing insert ring; 14. Retaining ring; 15. Water inlet channel; 16. Water outlet channel; 17. First flow channel hole; 18. Second flow channel hole; 19. Third flow channel hole; 20. Cooling chamber; 21. Lifting hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0019] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0020] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0021] like Figure 1 The present invention provides a hot runner nozzle structure, including a mold 8, a hot nozzle 1 disposed inside the mold 8 and having a first flow channel hole 17, and a copper head 4 disposed at the end of the hot nozzle 1. The copper head 4 has a second flow channel hole 18 inside, and a water jacket 10 is connected between the end of the copper head 4 away from the hot nozzle 1 and the mold 8. The water jacket 10 has a cooling water circulation assembly on its periphery, and a third flow channel hole 19 is opened inside the water jacket 10 so that the first flow channel hole 17, the second flow channel hole 18 and the third flow channel hole 19 are connected in sequence.

[0022] The hot nozzle, copper head, and water jacket are connected in sequence, making the first, second, and third flow channels interconnected. The molten PET plastic can then flow along the first flow channel at the hot nozzle to the third flow channel in the water jacket for injection molding. Simultaneously, the cooling water circulation components around the water jacket ensure that it is constantly cooled by the cooling water, thereby rapidly reducing the temperature of the material inside the water jacket, improving cooling efficiency, shortening the overall cooling time of the PET plastic, accelerating the entire production cycle, and improving the quality and smoothness of the molded product.

[0023] Before the PET plastic medium enters the first flow channel hole, the opening and closing of the entrance to the first flow channel hole can be controlled by a timing controller or other structure, thereby synchronously controlling the usage status of each flow channel hole.

[0024] Preferably, a plurality of heating coils 3 are arranged around the outer periphery of the hot nozzle 1, and the heat insulation sleeve 2 is arranged outside the hot nozzle 1 so that the heating coils 3 are located between the hot nozzle 1 and the heat insulation sleeve 2.

[0025] Specifically, the outer circumference of the hot nozzle is uniformly heated by several heating coils, so that the medium can maintain a uniform temperature when it flows and is transported at the hot nozzle, avoiding premature condensation of the medium. At the same time, with the setting of the heat insulation sleeve, the heating effect of the heating coils on the hot nozzle can be more stable, preventing heat from escaping to the outside of the hot nozzle and improving heating efficiency and effect.

[0026] The heating coil can be either electrically heated or induction heated.

[0027] Preferably, a sealing sleeve 9 is provided on the outer periphery of the copper head 4. The sealing sleeve 9 is threadedly engaged with the hot nozzle 1, and one end of the sealing sleeve 9 presses against the end side of the copper head 4.

[0028] Specifically, by tightening the sealing sleeve to the hot nozzle, the sealing sleeve presses against the outer periphery of the copper head end, thereby making both sides of the outer periphery of the copper head end subject to the clamping effect of the hot nozzle and the sealing sleeve, thus improving the stability of the copper head and the second flow channel hole.

[0029] In one embodiment of this solution, one end of the hot nozzle has a stepped hole, which abuts against the sealing sleeve and the copper head to ensure a stable connection between the two.

[0030] Preferably, a heat insulation cap 11 is provided between the copper head 4 and the water jacket 10, and a through hole is provided in the middle of the heat insulation cap 11, and the through hole is located between the second flow channel hole 18 and the third flow channel hole 19.

[0031] Specifically, by using a heat insulation cap to insulate the copper head and the water jacket, the heat at the hot nozzle can only be maintained between the hot nozzle and the copper head. This increases the heat of the medium at the first and second flow channel holes, while maintaining the cooling effect of the cooling water at the third flow channel hole. This simultaneously prevents the medium from condensing prematurely and achieves rapid cooling at the outlet.

[0032] Preferably, a sealing ring 13 is connected between the sealing sleeve 9 and the water-carrying sleeve 10, and the outer periphery of the sealing ring 13 is in an interference fit with the water-carrying sleeve 10, and the inner periphery of the sealing ring 13 is in an interference fit with the sealing sleeve 9.

[0033] Specifically, the sealing ring provides heat insulation between the sealing sleeve and the water jacket, preventing the heat from being conducted to the water jacket after being conducted by the copper head or hot nozzle. This further enhances the heat insulation effect of the water jacket. Furthermore, the interference fit between the inner and outer sides of the sealing ring effectively increases the positioning and leak-proof function of the sealing ring on the sealing sleeve and the water jacket, thus preventing the medium from leaking out from the area between the sealing sleeve and the water jacket.

[0034] Preferably, the cooling water circulation assembly includes an inlet channel 15 and an outlet channel 16 respectively opened on both sides of the mold 8, and a cooling cavity 20 is opened between the inlet channel 15 and the outlet channel 16, with the outer periphery of the water jacket 10 located in the cooling cavity 20.

[0035] Specifically, cooling water enters the cooling chamber through the inlet channel, thereby cooling the water jacket in the cooling chamber and carrying away some of the heat carried by the medium at the third flow channel hole, so as to quickly reduce the temperature of the medium at the third flow channel hole. Then, the cooling water in the cooling chamber is discharged from the outlet channel to ensure stable circulation of cooling water and improve the cooling effect.

[0036] Both the inlet and outlet channels are connected to the external cooling water supply equipment to ensure the stability of the overall cooling water circulation path.

[0037] Preferably, a first sealing ring 7 and a second sealing ring 12 are provided at intervals between the outer periphery of the water jacket 10 and the mold 8, and the first sealing ring 7 and the second sealing ring 12 are respectively placed on both sides of the cooling cavity 20.

[0038] Specifically, the first and second sealing rings seal the position between the water jacket and the mold, and ensure the sealing effect on both sides of the cooling chamber, thereby preventing the cooling water from leaking out from the position between the water jacket and the mold, and improving the overall flow path stability of the cooling water circulation.

[0039] Preferably, a retaining ring 14 is snapped onto the outer periphery of the hot nozzle 1, and the end of the heat insulation sleeve 2 abuts against the retaining ring 14.

[0040] Specifically, the heat insulation sleeve is stopped and limited by a retaining ring to ensure its stable installation, thereby improving the heat insulation effect of the heat insulation sleeve on the heating coil.

[0041] In one embodiment of this solution, an annular groove is provided on the outer periphery of the hot nozzle, and the retaining ring is engaged in the annular groove to ensure the stability of the retaining ring itself, thereby ensuring the stable positioning of the retaining ring on the heat insulation sleeve.

[0042] The retaining ring can be made of elastic materials such as rubber.

[0043] Preferably, a water-carrying sleeve pressing block 5 is arranged on the inner side of the mold 8, and a water-carrying sleeve base 6 is provided between the water-carrying sleeve pressing block 5 and the water-carrying sleeve 10, so that the water-carrying sleeve pressing block 5 can position the water-carrying sleeve 10 through the water-carrying sleeve base 6.

[0044] Specifically, after the water jacket and sealing sleeve are installed, the water jacket base is connected to the periphery of the water jacket, and the water jacket pressing block is pressed and fixed to the water jacket base. This allows the water jacket to be positioned and pressed by the water jacket pressing block, ensuring that the position of the water jacket relative to the mold and hot nozzle is stable, thereby ensuring the stability of the flow path of each flow channel hole and the flow path of the cooling water.

[0045] Preferably, the water jacket base 6 has several lifting holes 21 on the side facing the water jacket pressure block 5, and the water jacket base 6 and the water jacket 10 are threaded together.

[0046] Specifically, when connecting the water jacket base and the water jacket, rotate the water jacket base so that the water jacket base and the water jacket are connected by threads. Then, press the water jacket pressure block to press and position the water jacket. When disassembling the water jacket, the water jacket base can be lifted by removing the water jacket pressure block and using the lifting holes, so that the water jacket can be lifted and removed at the same time, thus improving the convenience of disassembling the water jacket.

[0047] In one embodiment of this solution, the method for lifting the water jacket base can be as follows: screw the bolt with the lifting ring into the lifting hole, and then lift the bolt through the lifting ring, thereby simultaneously lifting the water jacket base and the water jacket. During normal use of the water jacket, the bolt can be disassembled and removed to ensure stable contact between the water jacket base and the water jacket pressure block.

[0048] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A hot runner nozzle structure, characterized in that: The device includes a mold (8), a hot nozzle (1) located inside the mold (8) and having a first flow channel hole (17), and a copper head (4) located at the end of the hot nozzle (1). The copper head (4) has a second flow channel hole (18) inside, and a water jacket (10) is connected between the end of the copper head (4) away from the hot nozzle (1) and the mold (8). The water jacket (10) has a cooling water circulation assembly around its periphery, and a third flow channel hole (19) is opened inside the water jacket (10) so that the first flow channel hole (17), the second flow channel hole (18) and the third flow channel hole (19) are connected in sequence.

2. The hot runner nozzle structure according to claim 1, characterized in that: The hot nozzle (1) is provided with several heating rings (3) on its outer periphery, and the heat insulation sleeve (2) is provided on the outside of the hot nozzle (1) so that the heating rings (3) are located between the hot nozzle (1) and the heat insulation sleeve (2).

3. The hot runner nozzle structure according to claim 1, characterized in that: A sealing sleeve (9) is provided on the outer periphery of the copper head (4). The sealing sleeve (9) is threadedly engaged with the hot nozzle (1), and one end of the sealing sleeve (9) presses against the end side of the copper head (4) for compression.

4. The hot runner nozzle structure according to claim 1, characterized in that: A heat insulation cap (11) is provided between the copper head (4) and the water jacket (10). A through hole is provided in the middle of the heat insulation cap (11), and the through hole is located between the second flow channel hole (18) and the third flow channel hole (19).

5. The hot runner nozzle structure according to claim 3, characterized in that: A sealing ring (13) is connected between the sealing sleeve (9) and the water-carrying sleeve (10), and the outer periphery of the sealing ring (13) is in an interference fit with the water-carrying sleeve (10), and the inner periphery of the sealing ring (13) is in an interference fit with the sealing sleeve (9).

6. The hot runner nozzle structure according to claim 1, characterized in that: The cooling water circulation assembly includes an inlet channel (15) and an outlet channel (16) respectively opened on both sides of the mold (8). A cooling chamber (20) is opened between the inlet channel (15) and the outlet channel (16). The outer periphery of the water jacket (10) is located in the cooling chamber (20).

7. The hot runner nozzle structure according to claim 6, characterized in that: The water jacket (10) is provided with a first sealing ring (7) and a second sealing ring (12) at intervals between its outer periphery and the mold (8), and the first sealing ring (7) and the second sealing ring (12) are respectively placed on both sides of the cooling cavity (20).

8. The hot runner nozzle structure according to claim 2, characterized in that: A retaining ring (14) is snapped onto the outer periphery of the hot nozzle (1), and the end of the heat insulation sleeve (2) abuts against the retaining ring (14).

9. The hot runner nozzle structure according to claim 1, characterized in that: The mold (8) is provided with a water jacket pressing block (5) on the inner side. A water jacket base (6) is provided between the water jacket pressing block (5) and the water jacket (10) so that the water jacket pressing block (5) can position the water jacket (10) through the water jacket base (6).

10. The hot runner nozzle structure according to claim 9, characterized in that: The water jacket base (6) has several lifting holes (21) on the side facing the water jacket pressure block (5), and the water jacket base (6) and the water jacket (10) are threaded together.

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