A stable and reliable needle valve hot runner mold

Abstract

The utility model discloses a stable and reliable needle valve hot runner mould relates to hot runner mould technical field, including bolt connection's upper die and lower die, be equipped with forming cavity on the lower die, be equipped with with forming cavity's intercommunication needle valve hot runner on the upper die, the needle valve hot runner top is equipped with inlet, be equipped with the first cooling mechanism for carrying out the cooling of the top surface and side surface of product in the upper die, be equipped with the second cooling mechanism for carrying out the cooling of the bottom surface of product in the lower die, the utility model discloses a first cooling mechanism of " first air cooling cavity + first liquid cooling assembly " is established in the upper die, the second cooling mechanism of " second air cooling cavity + second liquid cooling assembly " is established in the lower die, realized to the all -round synchronous cooling of the top surface, side surface and bottom surface of forming product, reached the purpose that rapidly took away heat, shortened the cooling period, improved production efficiency.

Description

Technical Field

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

[0002] Hot runner molds are molds that use heating devices to prevent the melt inside the runner from solidifying. Compared to traditional cold runner molds, they offer numerous advantages such as shorter molding cycles, material savings, stable product quality, and the ability to automate production, leading to their widespread use in industrialized countries and regions worldwide. A hot runner system typically consists of several parts, including hot nozzles, manifolds, a temperature control box, and accessories.

[0003] The patent with authorization announcement number CN217476496U discloses a uniformly heated mold hot runner. The top plate is connected to the pad block through a connecting mechanism, and the pad block is connected to the base at the same time to complete the assembly work, making the mold assembly and disassembly work faster and greatly improving the efficiency of mold assembly and disassembly.

[0004] However, the aforementioned hot runner molds lack an efficient cooling structure compatible with the hot runner system. During injection molding, when the melt has filled and rapid cooling is needed to ensure product setting and shorten the molding cycle, the system relies solely on the mold's natural heat dissipation, failing to provide targeted rapid cooling. This inefficient cooling method results in long demolding times, significantly impacting overall processing efficiency and failing to meet the demands of modern production for high efficiency and short cycle times.

[0005] Based on this, a stable and reliable needle valve hot runner mold is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0006] The purpose of this invention is to provide a stable and reliable needle valve hot runner mold to solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A stable and reliable needle valve hot runner mold includes an upper mold and a lower mold bolted together. The lower mold has a molding cavity, and the upper mold has a needle valve hot runner that communicates with the molding cavity. The needle valve hot runner has a feed port at its top. The upper mold has a first cooling mechanism for cooling the top and sides of the product, and the lower mold has a second cooling mechanism for cooling the bottom of the product.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative: a positioning groove is provided on the outer side of the molding cavity, and a positioning block matching the positioning groove is provided at the lower end of the upper mold.

[0009] In one alternative: the first cooling mechanism includes a first air-cooled cavity disposed within the upper mold and a first liquid-cooled component disposed at the lower end of the first air-cooled cavity.

[0010] In one alternative: the second cooling mechanism includes a second air-cooled cavity disposed within the lower mold and a second liquid-cooled component disposed between the second air-cooled cavity and the molding cavity.

[0011] In one alternative: a first fan is provided on one side of the first air-cooled cavity, and a first ventilation slot is provided on the other side. A plurality of first heat dissipation fins are provided inside the first air-cooled cavity.

[0012] In one alternative: the first liquid cooling assembly includes a first liquid flow pipe disposed at the lower end of the upper mold and a second liquid flow pipe disposed within the positioning block. The first liquid flow pipe and the second liquid flow pipe communicate with each other, and a first connecting pipe for connecting to an external coolant tank is provided on one side of the first liquid flow pipe and the second liquid flow pipe.

[0013] In one alternative: a second fan is provided on one side of the second air-cooling cavity, a second ventilation slot is provided on the other side, and a number of second heat dissipation fins are provided inside the second air-cooling cavity.

[0014] In one alternative: the second liquid cooling assembly includes a third liquid flow pipe disposed between the second air cooling chamber and the molding chamber, and a second connecting pipe is provided on one side of the third liquid flow pipe for connecting to an external coolant tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention achieves all-round synchronous cooling of the top, side and bottom surfaces of the molded product by setting a first cooling mechanism of "first air-cooling cavity + first liquid cooling component" in the upper mold and a second cooling mechanism of "second air-cooling cavity + second liquid cooling component" in the lower mold, thereby achieving the purpose of rapidly removing heat, shortening the cooling cycle and improving production efficiency. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of one side of the present invention.

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

[0018] Figure 3 This is a schematic diagram of the upper and lower molds in this utility model.

[0019] Figure 4This is a schematic diagram of the structure of the first liquid cooling component and the second liquid cooling component in this utility model.

[0020] Figure reference numerals: 100, upper mold; 101, needle valve hot runner; 102, feed port; 103, positioning block; 200, lower mold; 201, molding cavity; 202, positioning groove; 300, first air-cooled cavity; 301, first fan; 302, first ventilation slot; 303, first heat dissipation fin; 400, second air-cooled cavity; 401, second fan; 402, second ventilation slot; 403, second heat dissipation fin; 500, first liquid cooling assembly; 501, first liquid flow pipe; 502, second liquid flow pipe; 503, first connecting pipe; 600, second liquid cooling assembly; 601, third liquid flow pipe; 602, second connecting pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] In one embodiment, such as Figures 1-3 As shown, a stable and reliable needle valve hot runner mold includes an upper mold 100 and a lower mold 200 bolted together. The lower mold 200 is provided with a molding cavity 201, and the upper mold 100 is provided with a needle valve hot runner 101 connected to the molding cavity 201. The top of the needle valve hot runner 101 is provided with a feed port 102. The upper mold 100 is provided with a first cooling mechanism for cooling the top and sides of the product, and the lower mold 200 is provided with a second cooling mechanism for cooling the bottom of the product. In use, the upper mold 100 and the lower mold 200 are fixed together by bolts, and then the molten liquid is added into the molding cavity 201 from the needle valve hot runner 101. Then, through the first cooling mechanism and the second cooling mechanism, the top, sides and bottom of the molded product are cooled synchronously in all directions.

[0023] In one embodiment, such as Figure 3 As shown, a positioning groove 202 is provided on the outside of the molding cavity 201, and a positioning block 103 matching the positioning groove 202 is provided at the lower end of the upper mold 100. In use, the upper mold 100 and the lower mold 200 are aligned and connected by matching the positioning groove 202 and the positioning block 103.

[0024] In one embodiment, such as Figures 2-4As shown, the first cooling mechanism includes a first air-cooling cavity 300 disposed within the upper mold 100 and a first liquid-cooling assembly 500 disposed at the lower end of the first air-cooling cavity 300. A first fan 301 is provided on one side of the first air-cooling cavity 300, and a first ventilation slot 302 is provided on the other side. A plurality of first heat dissipation fins 303 are disposed within the first air-cooling cavity 300. The first liquid-cooling assembly 500 includes a first liquid flow pipe 501 disposed at the lower end of the upper mold 100 and a second liquid flow pipe 502 disposed within the positioning block 103. The first liquid flow pipe 501… The first liquid flow pipe 501 and the second liquid flow pipe 502 are connected to the second liquid flow pipe 502. The first connecting pipe 503 is provided on one side of the first liquid flow pipe 501 and the second liquid flow pipe 502 for connecting to the external coolant tank. In use, coolant is injected into the first liquid flow pipe 501 and the second liquid flow pipe 502 through the external coolant tank, so that the coolant circulates along the first liquid flow pipe 501 and the second liquid flow pipe 502, taking away the heat of the product. At the same time, some of the heat is transferred to the first heat dissipation fins 303, and the heat is discharged from the first ventilation slot 302 by the first fan 301.

[0025] In one embodiment, such as Figures 2-4 As shown, the second cooling mechanism includes a second air-cooling cavity 400 disposed within the lower mold 200 and a second liquid cooling assembly 600 disposed between the second air-cooling cavity 400 and the molding cavity 201. A second fan 401 is provided on one side of the second air-cooling cavity 400, and a second ventilation slot 402 is provided on the other side. A plurality of second heat dissipation fins 403 are provided inside the second air-cooling cavity 400. The second liquid cooling assembly 600 includes a third liquid flow pipe 601 disposed between the second air-cooling cavity 400 and the molding cavity 201. A second connecting pipe 602 for connecting to an external coolant tank is provided on one side of the third liquid flow pipe 601. In use, coolant is injected into the third liquid flow pipe 601 through the external coolant tank, so that the coolant circulates along the third liquid flow pipe 601, carrying away the heat of the product, and transferring some of the heat to the second heat dissipation fins 403. The heat is discharged from the second ventilation slot 402 by the second fan 401.

[0026] The above embodiment discloses a stable and reliable needle valve hot runner mold. Through the first cooling mechanism of "first air cooling cavity 300 + first liquid cooling component 500" in the upper mold 100, and the second cooling mechanism of "second air cooling cavity 400 + second liquid cooling component 600" in the lower mold 200, the top, side and bottom surfaces of the molded product are cooled synchronously in all directions, which achieves the purpose of quickly removing heat, shortening the cooling cycle and improving production efficiency.

[0027] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A stable and reliable needle valve hot runner mold, comprising an upper mold (100) and a lower mold (200) bolted together, wherein the lower mold (200) is provided with a molding cavity (201), and the upper mold (100) is provided with a needle valve hot runner (101) communicating with the molding cavity (201), wherein the top end of the needle valve hot runner (101) is provided with a feed port (102), characterized in that, The upper mold (100) is provided with a first cooling mechanism for cooling the top and sides of the product, and the lower mold (200) is provided with a second cooling mechanism for cooling the bottom of the product.

2. The stable and reliable needle valve hot runner mold according to claim 1, characterized in that, The molding cavity (201) is provided with a positioning groove (202) on the outside, and the upper mold (100) is provided with a positioning block (103) at the lower end that matches the positioning groove (202).

3. The stable and reliable needle valve hot runner mold according to claim 1, characterized in that, The first cooling mechanism includes a first air-cooled cavity (300) disposed in the upper mold (100) and a first liquid-cooled assembly (500) disposed at the lower end of the first air-cooled cavity (300).

4. The stable and reliable needle valve hot runner mold according to claim 1, characterized in that, The second cooling mechanism includes a second air-cooled cavity (400) disposed in the lower mold (200) and a second liquid-cooled assembly (600) disposed between the second air-cooled cavity (400) and the molding cavity (201).

5. A stable and reliable needle valve hot runner mold according to claim 3, characterized in that, The first air-cooled cavity (300) has a first fan (301) on one side and a first ventilation slot (302) on the other side. The first air-cooled cavity (300) has a plurality of first heat dissipation fins (303).

6. A stable and reliable needle valve hot runner mold according to claim 3, characterized in that, The first liquid cooling assembly (500) includes a first liquid flow pipe (501) disposed at the lower end of the upper mold (100) and a second liquid flow pipe (502) disposed in the positioning block (103). The first liquid flow pipe (501) and the second liquid flow pipe (502) communicate with each other. A first connecting pipe (503) for connecting to an external coolant tank is provided on one side of the first liquid flow pipe (501) and the second liquid flow pipe (502).

7. A stable and reliable needle valve hot runner mold according to claim 4, characterized in that, The second air-cooled cavity (400) has a second fan (401) on one side and a second ventilation slot (402) on the other side. The second air-cooled cavity (400) has a number of second heat dissipation fins (403).

8. A stable and reliable needle valve hot runner mold according to claim 4, characterized in that, The second liquid cooling assembly (600) includes a third liquid flow pipe (601) disposed between the second air cooling cavity (400) and the molding cavity (201), and a second connecting pipe (602) for connecting to an external coolant tank is provided on one side of the third liquid flow pipe (601).

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