Heat nozzle structure capable of avoiding hidden glue behind valve needle
By using a spiral structure of a flow guide shuttle and a heating cylinder design in hot runner injection molding, the problem of glue accumulation behind the valve needle is solved, improving the molding quality and safety of the product.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN MOLD TIP TECH CO LTD
- Filing Date
- 2024-11-27
- Publication Date
- 2026-06-05
AI Technical Summary
In existing hot runner injection molding, the presence of adhesive behind the valve needle leads to poor finished product quality and can easily cause color errors when changing the adhesive.
The spiral structure of the flow guide shuttle is sleeved on the valve needle. Combined with the design of the heating cylinder and heat insulation cap, it improves the flowability of the rubber and maintains the molten state, preventing the rubber from sticking behind the valve needle.
This improved the yield rate of molded products and avoided problems such as reduced yield and color errors caused by glue trapped behind the valve needle.
Smart Images
Figure CN119589902B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of hot runner molds, and more particularly to a hot nozzle structure that can prevent glue from being trapped behind the valve needle. Background Technology
[0002] With the continuous development of industrial manufacturing, injection molding technology has been widely used in industrial manufacturing. Currently, hot runner molds are commonly used in injection molding. Molten rubber enters the mold through the sprue, flows through a manifold to multiple hot runners, and exits through the hot runners while being injected. To keep the rubber in a molten state within the mold, heating wires are installed inside the manifold and around the hot runners to continuously heat the manifold and hot runners. A valve needle driven by a cylinder is installed inside the hot runner to close the hot runner opening when injection needs to be stopped. This design blocks the flow of the rubber material. However, due to the valve needle's design, the rubber material is blocked when it flows into the hot nozzle, causing it to easily stagnate behind the valve needle. The rubber material stagnating behind the valve needle carbonizes due to prolonged heating. When the carbonized rubber material is finally flushed out of the hot nozzle, it affects the quality of the injection molded product. Furthermore, when the rubber material needs to be changed, the stagnant rubber material behind the valve needle causes the new rubber material to carry the stagnant material out with it, resulting in a mixture of the two materials flowing out and causing color errors in the injection molded product.
[0003] Regarding the aforementioned technologies, the hot nozzles used in existing hot runner injection molding have the drawback of producing poor-quality injection molded products. Summary of the Invention
[0004] This application provides a hot nozzle structure that avoids adhesive buildup behind the valve needle, thereby solving the problem of poor injection molding results caused by hot nozzles used in existing hot runner injection molding.
[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a hot nozzle structure that can avoid adhesive buildup behind the valve needle, the hot nozzle structure that can avoid adhesive buildup behind the valve needle includes:
[0006] The flow divider plate has a first flow channel that allows the rubber material to flow;
[0007] The main nozzle is used to inject the molten adhesive, and the main nozzle abuts against the first flow channel from the first surface of the manifold.
[0008] The nozzle body is disposed on the second surface of the flow divider plate. A second flow channel is disposed inside the nozzle body, which communicates with the first flow channel. A valve needle is disposed inside the nozzle body, which passes through the nozzle body and the flow divider plate.
[0009] A flow guide shuttle is sleeved on the valve needle. The flow guide shuttle includes a cylindrical connecting part and a flow guide part disposed on the outer wall of the connecting part. The flow guide part is configured with a spiral structure to improve the flowability of the adhesive.
[0010] By adopting the above technical solution, the guide shuttle is sleeved on the valve needle. When the molten rubber enters the flow divider, the rubber flows downward through the guide part of the guide shuttle. Since the guide part is set with a spiral structure, the fluidity of the rubber is improved, and the rubber is prevented from hiding behind the valve needle, thereby improving the yield of the molded product.
[0011] Preferably, the heat nozzle structure that prevents adhesive buildup behind the valve needle further includes:
[0012] The heating cylinder is configured as a cylindrical structure and is sleeved on the nozzle body. An annular groove is further provided on the outer peripheral side of the heating cylinder, and a heating wire is assembled in the annular groove.
[0013] By adopting the above technical solution, the heating cylinder is configured with the emission line on the outer periphery of the heating cylinder. The heating line is used to heat and increase the temperature of the nozzle body, so that the rubber material is kept in a molten state after entering the nozzle.
[0014] Preferably, the heat nozzle structure that prevents adhesive buildup behind the valve needle further includes:
[0015] The nozzle core is inserted and disposed at the end of the nozzle body away from the distributor plate. The nozzle core is used to dock with the mold to facilitate the injection of the adhesive into the mold.
[0016] By adopting the above technical solution, the nozzle core is designed to facilitate the flow of the adhesive from the nozzle core, thereby allowing the adhesive to enter the mold and complete the injection molding.
[0017] Preferably, the heat nozzle structure that prevents adhesive buildup behind the valve needle further includes:
[0018] The nozzle is configured as a ring structure and is inserted into the nozzle core to fix the nozzle core inside the nozzle body, thereby improving the stability of the nozzle core assembly.
[0019] By adopting the above technical solution, the setting of the nozzle is used to improve the stability of the nozzle core assembly, thereby improving the safety during product molding and the yield of finished products.
[0020] Preferably, the heat nozzle structure that prevents adhesive buildup behind the valve needle further includes:
[0021] A heat insulation cap is disposed on the nozzle core at the end away from the manifold. The heat insulation cap is configured as an annular plate structure with different radial dimensions at both ends. The radial dimension of the heat insulation cap on the side closer to the manifold is greater than the radial dimension of the side of the heat insulation cap away from the manifold.
[0022] By adopting the above technical solution, the heat insulation cap reduces the impact of the nozzle's temperature on the mold when the nozzle is close to the mold, thereby improving the mold's safety and thus increasing safety and yield during injection molding.
[0023] Preferably, the heat nozzle structure that prevents adhesive buildup behind the valve needle further includes:
[0024] An insert is disposed within the diverter plate. A connecting channel is provided within the insert, and the connecting channel is bent at 90 degrees within the insert. The valve needle passes through the insert, and the flow guide shuttle is disposed within the insert.
[0025] By adopting the above technical solution, the setting of the insert facilitates the assembly of the flow guide shuttle in the flow divider plate, and at the same time improves the convenience of maintaining the hot nozzle structure that avoids the back of the valve needle from being covered with glue.
[0026] Preferably, the heat nozzle structure that prevents adhesive buildup behind the valve needle further includes:
[0027] A cylinder is disposed on one side of the first surface of the flow divider plate, and the cylinder is used to drive the valve needle to move.
[0028] By adopting the above technical solution, the cylinder is configured to provide power support to the valve needle.
[0029] Preferably, the heat nozzle structure that prevents adhesive buildup behind the valve needle further includes:
[0030] Heating wires are arranged inside the distributor plate to provide heat support for the distributor plate.
[0031] By adopting the above technical solution, the heating wire is configured to provide heat to the distributor plate, so that the rubber material remains in a molten state after entering the distributor plate.
[0032] The beneficial effect of this application is that the hot nozzle structure provided by this application, which can avoid the back of the valve needle from being covered with adhesive, avoids the defect of low yield caused by the adhesive material being covered behind the valve needle through the setting of the guide shuttle. Attached Figure Description
[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:
[0034] Figure 1 This is a cross-sectional view of the hot nozzle structure that avoids adhesive buildup behind the valve needle, as provided in the embodiments of this application.
[0035] Explanation of reference numerals in the attached drawings: 100, manifold; 101, main nozzle; 102, nozzle body; 103, valve needle; 110, flow guide shuttle; 111, connecting part; 112, flow guide part; 120, heating cylinder; 121, annular groove; 130, nozzle core; 140, nozzle head; 150, heat insulation cap; 160, insert. Detailed Implementation
[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0037] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0038] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0039] Please see Figure 1As shown, this application provides a hot nozzle structure that avoids adhesive buildup behind the valve needle 103. The hot nozzle structure includes a manifold 100, a main nozzle 101, a nozzle body 102, a valve needle 103, and a guide shuttle 110. The manifold 100 has a first flow channel that allows adhesive to flow. The main nozzle 101 is used to inject molten adhesive. The main nozzle 101 abuts against the first flow channel from the first surface of the manifold 100. The nozzle body 102 is disposed on the second surface of the manifold 100 and has a second flow channel that communicates with the first flow channel. The valve needle 103 is disposed within the nozzle body 102 and penetrates the nozzle body 102. The flow guide shuttle 110 is sleeved on the valve needle 103 and is configured with the flow divider plate 100. The flow guide shuttle 110 includes a cylindrical connecting part 111 and a flow guide part 112 on the outer wall of the connecting part 111. The flow guide part 112 is configured with a spiral structure to improve the flowability of the rubber material. By using the flow guide shuttle 110 to sleeve on the valve needle 103, when the molten rubber material enters the flow divider plate 100, the rubber material flows downward through the flow guide part 112 of the flow guide shuttle 110. Since the flow guide part 112 is configured with a spiral structure, the flowability of the rubber material is improved, and the rubber material is prevented from being hidden behind the valve needle 103, thereby improving the yield of the molded product.
[0040] The hot nozzle structure that can prevent adhesive from being trapped behind the valve needle 103 also includes a heating cylinder 120. The heating cylinder 120 is a cylindrical structure and is sleeved on the nozzle body 102. An annular groove 121 is further provided on the outer periphery of the heating cylinder 120. A heating wire is installed in the annular groove 121. By setting the heating cylinder 120, an emission wire is set on the outer periphery of the heating cylinder 120. The heating wire is used to heat and increase the temperature of the nozzle body 102, so that the adhesive can be kept in a molten state after entering the nozzle body 102.
[0041] The hot nozzle structure that can prevent the back of the valve needle 103 from being covered with glue also includes a nozzle core 130. The nozzle core 130 is inserted and set at the end of the nozzle body 102 away from the flow divider plate 100. The nozzle core 130 is used to dock with the mold, so as to facilitate the injection of glue into the mold. The setting of the nozzle core 130 makes it easy for the glue to flow out from the nozzle core 130, so that the glue can enter the mold to complete the injection molding.
[0042] The hot nozzle structure that prevents adhesive from being trapped behind the valve needle 103 also includes a nozzle head 140. The nozzle head 140 is a ring-shaped structure and is inserted into the nozzle core 130 to fix the nozzle core 130 inside the nozzle body 102, thereby improving the stability of the nozzle core 130 assembly. The nozzle head 140 is used to improve the stability of the nozzle core 130 assembly, thereby improving the safety of product molding and the yield of finished products.
[0043] The hot nozzle structure that prevents adhesive buildup behind the valve needle 103 also includes a heat insulation cap 150. The heat insulation cap 150 is located on the nozzle core 130 at the end away from the manifold 100. The heat insulation cap 150 is a ring-shaped plate structure with different radial dimensions at both ends. The radial dimension of the heat insulation cap 150 on the side closer to the manifold 100 is greater than the radial dimension of the side farther from the manifold 100. By setting the heat insulation cap 150, the temperature of the nozzle body 102 is reduced when it is close to the mold, thus improving the safety of the mold and improving the safety and yield rate during injection molding.
[0044] The heat nozzle structure that prevents adhesive buildup behind the valve needle 103 also includes an insert 160. The insert 160 is disposed within the flow divider 100 and has a connecting channel that bends 90 degrees within the insert 160. The valve needle 103 passes through the insert 160, and a flow guide shuttle 110 is disposed within the insert 160. The placement of the insert 160 facilitates the assembly of the flow guide shuttle 110 within the flow divider 100 and improves the ease of maintenance of the heat nozzle structure that prevents adhesive buildup behind the valve needle 103.
[0045] The hot nozzle structure that can prevent adhesive from being trapped behind the valve needle 103 also includes a cylinder. The cylinder is located on one side of the first surface of the distributor plate 100. The cylinder is used to drive the valve needle 103 to move, and the setting of the cylinder provides power support for the valve needle 103.
[0046] The hot nozzle structure that can prevent adhesive from being trapped behind the valve needle 103 also includes heating wires. The heating wires are arranged inside the distributor plate 100 to provide heat support for the distributor plate 100. The heating wires provide heat to the distributor plate 100 so that the adhesive remains in a molten state after entering the distributor plate 100.
[0047] In summary, the hot nozzle structure provided in this application, which avoids adhesive buildup behind the valve needle 103, prevents adhesive from being trapped behind the valve needle 103 by setting the guide shuttle 110, thus avoiding defects in yield.
[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A hot nozzle structure that avoids adhesive buildup behind the valve needle (103), characterized in that, The heat nozzle structure that prevents adhesive buildup behind the valve needle (103) includes: The flow divider (100) has a first flow channel that allows the rubber material to flow; The main nozzle (101) is used to inject the molten adhesive, and the main nozzle (101) abuts against the first flow channel from the first surface of the distributor plate (100); A nozzle body (102) is disposed on the second surface of the flow divider plate (100). A second flow channel is disposed inside the nozzle body (102), which communicates with the first flow channel. A valve needle (103) is disposed inside the nozzle body (102), which passes through the nozzle body (102) and the flow divider plate (100). A flow guide shuttle (110) is sleeved on the valve needle (103). The valve needle (103) can slide up and down relative to the flow guide shuttle (110). The flow guide shuttle (110) includes a cylindrical connecting part (111) and a flow guide part (112) disposed on the outer wall of the connecting part (111). The flow guide part (112) is configured as a spiral structure to improve the flowability of the adhesive and prevent the adhesive from being stuck behind the valve needle (103). An insert (160) is disposed within the diverter plate (100). A connecting channel is provided within the insert (160). The connecting channel is bent at 90 degrees within the insert (160). A valve needle (103) is disposed through the insert (160). A flow guide shuttle (110) is disposed within the insert (160).
2. The hot nozzle structure according to claim 1 that avoids adhesive buildup behind the valve needle (103) is characterized in that, The heat nozzle structure that prevents adhesive buildup behind the valve needle (103) also includes: The heating cylinder (120) is configured as a cylindrical structure. The heating cylinder (120) is sleeved on the nozzle body (102). An annular groove (121) is further provided on the outer peripheral side of the heating cylinder (120), and a heating wire is assembled in the annular groove (121).
3. The hot nozzle structure according to claim 1 that avoids adhesive buildup behind the valve needle (103) is characterized in that, The heat nozzle structure that prevents adhesive buildup behind the valve needle (103) also includes: The nozzle core (130) is inserted into the nozzle body (102) at the end away from the flow divider plate (100). The nozzle core (130) is used to dock with the mold to facilitate the injection of the adhesive into the mold.
4. The hot nozzle structure according to claim 3 that avoids adhesive buildup behind the valve needle (103) is characterized in that, The heat nozzle structure that prevents adhesive buildup behind the valve needle (103) also includes: The nozzle (140) is configured as a ring structure and is inserted into the nozzle core (130) to fix the nozzle core (130) inside the nozzle body (102) and improve the stability of the nozzle core (130) assembly.
5. The hot nozzle structure according to claim 4 that avoids adhesive buildup behind the valve needle (103) is characterized in that, The heat nozzle structure that prevents adhesive buildup behind the valve needle (103) also includes: A heat insulation cap (150) is disposed on the nozzle core (130) at the end away from the diverter plate (100). The heat insulation cap (150) is configured as an annular plate structure with different radial dimensions at both ends. The radial dimension of the heat insulation cap (150) on the side closer to the diverter plate (100) is greater than the radial dimension of the side of the heat insulation cap (150) away from the diverter plate (100).
6. The hot nozzle structure according to claim 1 that avoids adhesive buildup behind the valve needle (103) is characterized in that, The heat nozzle structure that prevents adhesive buildup behind the valve needle (103) also includes: A cylinder is disposed on one side of the first surface of the flow divider (100) and is used to drive the valve needle (103) to move.
7. The hot nozzle structure according to claim 1 that avoids adhesive buildup behind the valve needle (103), characterized in that, The heat nozzle structure that prevents adhesive buildup behind the valve needle (103) also includes: Heating wires are arranged inside the distributor plate (100) to provide heat support for the distributor plate (100).