Segmented 16e-09e hot runner nozzle

Abstract

The utility model discloses sectional type 16E 09E hot runner nozzle belongs to hot runner system technical field. This sectional type 16E 09E hot runner nozzle includes: 16E nozzle body and 09E nozzle body, is equipped with the first flow channel hole in 16E nozzle body and is equipped with the second flow channel hole in 09E nozzle body, and 16E nozzle body and 09E nozzle body screw joint cooperation, make the coaxial butt joint of first flow channel hole and second flow channel hole, form the melt flow channel of through, and 16E nozzle body and 09E nozzle body are equipped with sealing cooperation. The utility model can directly reuse existing standard 16E nozzle body and 09E nozzle body, avoid the high -cost processing of non -standard integral type structure, reduce production cost, shorten assembly cycle, simplify flow channel hole processing flow, improve the machining accuracy and surface finish of flow channel hole, reduce melt stagnation risk, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of hot runner system technology, specifically to a segmented 16E-09E hot runner nozzle for injection molds. Background Technology

[0002] In the field of injection molding, hot runner nozzles are core components for accurately delivering melt to the mold cavity. Different nozzle specifications need to be adapted to different mold structures and injection molding requirements. In actual production, when it is necessary to combine the high flow rate of the 16E nozzle with the compatibility of the 09E nozzle and nozzle tip, although the existing 16E to 09E integrated nozzle can meet the basic design requirements of the mold (such as melt delivery path and cavity feeding adaptation), the following key pain points remain unresolved in practical applications: 1. Extremely difficult to process and high non-standard costs: Although the existing 16E to 09E integrated nozzle can achieve the functions required by the mold design, the 16E to 09E nozzle needs to be processed into an integrated shape. Not only does it have to overcome the problem of transition processing from large diameter to small diameter (such as easy wobble in deep hole drilling, difficulty in controlling the accuracy of the transition fillet of the different diameter section, requiring multiple rework corrections), but it also requires the separate design of non-standard structures for the cavity layout of different molds. Non-standard processing requires customized special tools and fixtures, resulting in high mold opening costs, long processing cycles, and the inability to reuse existing standard nozzle inventory, which leads to a significant increase in mass production costs and extremely poor economic efficiency in small and medium batch production scenarios. 2. Difficulty in ensuring the machining accuracy of the flow channel hole increases maintenance costs: The flow channel hole of the integrated nozzle needs to transition from the large diameter of the 16E nozzle (usually ≥16mm) to the small diameter of the 09E nozzle (usually ≤10mm). The length of the transition channel can reach 30-50mm. During machining, coaxiality deviation (often ≥0.05mm) and insufficient surface finish of the transition section with different diameters (Ra≥1.6μm) are likely to occur. Although melt delivery can be achieved, the melt is prone to stagnation in the transition section. Long-term use can easily lead to melt degradation and flow channel blockage, requiring frequent disassembly and cleaning, increasing maintenance costs and affecting production efficiency.

[0003] Therefore, there is an urgent need for a segmented 16E-09E hot runner nozzle that can reuse standard parts, reduce costs, simplify processing, and improve runner accuracy while meeting mold design requirements, in order to solve the problem that the existing integrated solution "meets functional requirements but lacks economy and processability". Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a segmented 16E-09E hot runner nozzle to achieve the following objectives: 1. Under the premise of meeting the mold design requirements (such as melt delivery and cavity feeding adaptation), the existing standard 16E nozzle body and 09E nozzle body can be directly reused to avoid the high cost of non-standard integrated structure processing, reduce production costs and shorten the assembly cycle. 2. Simplify the flow channel hole machining process, improve the machining accuracy and surface finish of the flow channel holes, reduce the risk of melt retention, and reduce maintenance costs.

[0005] The technical solution of this utility model is: a segmented 16E-09E hot runner nozzle, comprising: a 16E nozzle body and a 09E nozzle body.

[0006] One end of the 16E nozzle body is a melt inlet end, which is used to adapt to the main runner of the hot runner system. A first flow channel hole is provided through the body of the 16E nozzle.

[0007] One end of the 09E nozzle body is the melt outlet end, which is used to adapt to the mold cavity feed port. A second flow channel hole is provided through the body of the 09E nozzle.

[0008] The other end of the 16E nozzle body has an internal threaded hole along the axial direction.

[0009] The other end of the 09E nozzle body is provided with an external thread section along the axial direction.

[0010] The 16E nozzle body and the 09E nozzle body are screwed together by an internal threaded hole and an external threaded section, so that the first flow channel hole and the second flow channel hole are coaxially connected to form a through melt flow channel.

[0011] The 16E nozzle body and the 09E nozzle body are fitted with a sealing fit.

[0012] In a further embodiment, the inner surface finish of the first and second flow channel holes is ≤0.8μm.

[0013] In a further embodiment, the inner surface finish of the first and second flow channel holes is 0.4 μm.

[0014] In a further embodiment, the coaxiality of the first flow channel hole and the second flow channel hole is ≤0.02mm. The high precision of the inner surface finish and coaxiality of the first and second flow channel holes effectively reduces the risk of melt retention and reduces the frequency of flow channel blockage and cleaning and maintenance.

[0015] In a further embodiment, the end face of the internal threaded hole of the 16E nozzle body and the end face of the external threaded section of the 09E nozzle body are sealing surfaces.

[0016] The 16E nozzle body and the 09E nozzle body form an end face seal through a sealing surface. In other embodiments, sealing rings or other sealing components can also be used to achieve the seal at the connection between the 16E nozzle body and the 09E nozzle body. However, using an end face seal instead of a traditional sealing component reduces the number of parts, lowers the assembly complexity, and avoids the sealing failure problem caused by the aging of the sealing component. This improves the long-term stability of the nozzle and ensures that the service life of the equipment is extended while meeting the mold design requirements.

[0017] In a further embodiment, the tightening torque of the 16E nozzle body and the 09E nozzle body is 50-60 N·m, which can ensure that the sealing surface of the 16E and the sealing surface of the 09E are tightly fitted, with a fitting gap ≤0.005mm, thereby achieving a reliable end face seal.

[0018] In a further embodiment, the sealing surface gap between the 16E nozzle body and the 09E nozzle body is ≤0.005mm.

[0019] In a further embodiment, the flatness of the sealing surface is ≤0.01mm and the roughness is ≤0.8μm. The high precision of the sealing surface and the control of the tightening torque ensure that the sealing surfaces fit tightly and achieve reliable end face sealing.

[0020] The beneficial effects of this utility model are: 1. Meeting design requirements and significantly reducing costs: Under the premise of ensuring that the design requirements such as mold melt delivery and cavity feeding are met, the existing standard 16E nozzle body and 09E nozzle body circulating in the market are directly adopted. Only the connecting end face needs to be precision machined. There is no need to customize non-standard integrated structure, saving the development costs of special tools and fixtures, shortening the processing cycle, and reusing the existing standard nozzle inventory to reduce spare parts costs. The economic efficiency is significantly improved in small and medium batch production scenarios.

[0021] 2. Higher flow channel precision and easier maintenance: The first flow channel hole of the 16E nozzle body and the second flow channel hole of the 09E nozzle body are machined independently. The length of a single flow channel hole is short, making it easier to ensure coaxiality, hole diameter accuracy and inner surface finish during machining. This effectively reduces the risk of melt retention, reduces flow channel blockage and cleaning and maintenance frequency, and improves production efficiency. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the assembly structure of the segmented 16E-09E hot runner nozzle of this utility model.

[0023] Figure 2 yes Figure 1 A magnified view of part A.

[0024] The reference numerals in the figure are as follows: 16E nozzle body 1, melt inlet end 1.1, internal threaded hole 1.2, first flow channel hole 1.3, sealing surface 1.4, 09E nozzle body 2, melt outlet end 2.1, external threaded section 2.2, second flow channel hole 2.3, nozzle tip 3. Detailed Implementation

[0025] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0026] This application discloses a segmented 16E-09E hot runner nozzle that, while meeting mold design requirements, can reuse standard components, reduce costs, simplify processing, and improve runner accuracy, in order to solve the problem that existing integrated solutions "meet functional requirements but lack economic efficiency and manufacturability".

[0027] like Figure 1 and 2 The segmented 16E-09E hot runner nozzle shown includes a 16E nozzle body 1 and a 09E nozzle body 2.

[0028] 16E Nozzle Body 1: This is the main structure of the existing standard 16E hot runner nozzle. One end is the melt inlet end 1.1, which is adapted to the main runner of the hot runner system to ensure high-flow melt delivery and meet the mold feeding requirements. The other end has an internal threaded hole 1.2 along the axial direction. The end face of the threaded hole is a precision-machined sealing surface with a flatness of ≤0.01mm and a roughness Ra≤0.8μm. The 16E nozzle body 1 has a first flow channel hole 1.3 that runs through it. One end of the first flow channel hole 1.3 is the melt inlet end 1.1, and the other end extends to the bottom of the internal threaded hole 1.2.

[0029] 09E Nozzle Body 2: This is the main structure of the existing standard 09E specification hot runner nozzle. One end is the melt outlet end 2.1, which is adapted to a small-sized nozzle 3 to fit the mold cavity inlet and meet the mold feeding design requirements. The other end is provided with an external thread section 2.2 along the axial direction that matches the internal thread hole 1.2 of the 16E nozzle body 1. The end face of the external thread section 2.2 is a precision-machined sealing surface that matches the sealing surface of the 16E nozzle body 1. The flatness of the sealing surface is ≤0.01mm and the roughness Ra is ≤0.8μm. A second flow channel hole 2.3 is provided through the 09E nozzle body 2. One end of the second flow channel hole 2.3 is the melt outlet end 2.1, and the other end extends to the end face of the external thread section 2.2. The melt outlet end 2.1 is connected to the outlet of the nozzle 3.

[0030] Assembly and sealing relationship: The 09E nozzle body 2 is threadedly connected to the internal threaded hole 1.2 of the 16E nozzle body 1 through the external thread section 2.2. After tightening, the precision-machined sealing surfaces of the two nozzles fit tightly together, forming an end face seal to prevent the melt from leaking from the threaded connection gap; at the same time, the first flow channel hole 1.3 and the second flow channel hole 2.3 are coaxially connected to form a through melt flow channel to meet the melt delivery requirements of the mold.

[0031] Component processing and selection: 16E Nozzle Body 1: The body of the existing standard 16E hot runner nozzle is selected. The internal thread hole 1.2 is M22×1.5 with a depth of 15mm. The sealing surface of the 16E nozzle body 1 is precision machined by a surface grinder to ensure flatness ≤0.01mm and roughness Ra≤0.8μm. The diameter of the first flow channel hole 1.3 is 16mm. The inner surface is honed to achieve a surface finish of Ra0.4μm, which meets the high flow rate feeding requirements of the mold.

[0032] 09E Nozzle Body 2: The body of the existing standard 09E hot runner nozzle is selected. The external thread section 2.2 is M22×1.5 with a length of 15mm, so that the external thread section 2.2 matches the internal thread hole 1.2. The sealing surface of the 09E nozzle body 2 is precision machined by a surface grinder, with a flatness of ≤0.01mm and a roughness Ra≤0.8μm. The second flow channel hole 2.3 has a diameter of 16mm to 10mm, and the inner surface is honed to a surface finish of Ra0.4μm. The melt outlet end 2.1 is adapted to the 09E nozzle 3 to meet the mold feeding design requirements.

[0033] Assembly process: Align the external thread section 2.2 of the 09E nozzle body 2 with the internal thread hole 1.2 of the 16E nozzle body 1, and manually pre-tighten until the two sealing surfaces 1.4 are initially in contact.

[0034] Tighten both using a torque wrench, controlling the tightening torque to 50-60 N·m, so that the fitting gap is ≤0.005 mm, ensuring that the two sealing surfaces 1.4 fit tightly and achieve reliable end face sealing; at the same time, ensure that the coaxiality error between the first flow channel hole 1.3 and the second flow channel hole 2.3 is ≤0.02 mm.

[0035] Usage process: Install the assembled segmented nozzles into the hot runner system corresponding to the mold. The melt inlet end 1.1 of the 16E nozzle body 1 is connected to the main runner of the hot runner. The melt outlet end 2.1 of the 09E nozzle body 2 is equipped with the 09E nozzle 3 and aligned with the mold cavity feed port to meet the mold feeding design requirements.

[0036] The hot runner system heats and controls the temperature of the melt inside the 16E nozzle body 1, the 09E nozzle body 2, and the first flow channel hole 1.3 and the second flow channel hole 2.3.

[0037] The melt is precisely delivered to the mold cavity through the first runner hole 1.3, the second runner hole 2.3, and the 09E nozzle 3 to complete the injection molding. The product has no quality problems such as missing material, and there is no melt stagnation in the runner, so there is no need for frequent cleaning.

[0038] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. Segmented 16E-09E hot runner nozzle, including: 16E nozzle body and 09E nozzle body; One end of the 16E nozzle body is a melt inlet end, which is used to adapt to the main runner of the hot runner system. A first flow channel hole is provided through the body of the 16E nozzle. One end of the 09E nozzle body is a melt outlet end, which is used to adapt to the mold cavity feed port. A second flow channel hole is provided through the body of the 09E nozzle. The 16E nozzle body is characterized by having an internally threaded hole at the other end along the axial direction; The other end of the 09E nozzle body is provided with an external thread section along the axial direction. The 16E nozzle body and the 09E nozzle body are screwed together by an internal threaded hole and an external threaded section, so that the first flow channel hole and the second flow channel hole are coaxially connected to form a through melt flow channel. The 16E nozzle body and the 09E nozzle body are fitted with a sealing fit.

2. The segmented 16E-09E hot runner nozzle according to claim 1, characterized in that, The surface finish of the inner surfaces of the first and second flow channel holes is ≤0.8μm.

3. The segmented 16E-09E hot runner nozzle according to claim 2, characterized in that, The surface finish of the inner surfaces of the first and second flow channels is 0.4 μm.

4. The segmented 16E-09E hot runner nozzle according to any one of claims 1-3, characterized in that, The coaxiality of the first flow channel hole and the second flow channel hole is ≤0.02mm.

5. The segmented 16E-09E hot runner nozzle according to claim 1, characterized in that, The end face of the internal threaded hole of the 16E nozzle body and the end face of the external threaded section of the 09E nozzle body are sealing surfaces. The 16E nozzle body and the 09E nozzle body form an end face seal through the sealing surface.

6. The segmented 16E-09E hot runner nozzle according to claim 5, characterized in that, The tightening torque of the 16E nozzle body and the 09E nozzle body is 50-60 N·m.

7. The segmented 16E-09E hot runner nozzle according to claim 6, characterized in that, The sealing surface gap between the 16E nozzle body and the 09E nozzle body is ≤0.005mm.

8. The segmented 16E-09E hot runner nozzle according to any one of claims 5-7, characterized in that, The flatness of the sealing surface is ≤0.01mm, and the roughness is ≤0.8μm.

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