Hot runner nozzle tip structure
By using beryllium copper in the hot runner nozzle tip structure and combining it with stainless steel inserts and guide section design, the problems of poor wear resistance and insufficient thermal conductivity of beryllium copper are solved, achieving efficient heat transfer and low wear, and improving the service life and application range of the gate mold core.
Patent Information
- Application Number
- CN202423321928.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The existing hot runner nozzle tip suffers from frequent wear due to the poor wear resistance of beryllium copper, which affects the service life of the gate mold core. At the same time, the poor thermal conductivity of steel makes it impossible to effectively maintain the gate temperature.
The nozzle tip is made of beryllium copper and a stainless steel insert is installed on its head. Combined with the guide section design, the valve needle moves along the guide section, which has good thermal conductivity and high wear resistance, reducing the wear between the valve needle and the gate.
It improves the service life of the nozzle tip and the durability of the sprue core, ensures stable sprue temperature, has a wide range of applications, and is compatible with various plastic raw materials.
Smart Images
Figure CN223589989U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hot runner technical field especially is related to a hot runner nozzle tip structure. BACKGROUND
[0002] In the needle valve type hot runner structure mold, the heating seat of hot runner is equipped with nozzle tip, valve needle, sprue bushing and other parts. The valve needle passes through the nozzle tip and then inserts into the sprue of the sprue bushing, and the opening and closing of the sprue are controlled by the forward and backward movement of the valve needle. In this process, the nozzle tip needs to be continuously heated to ensure the temperature of the sprue of the sprue bushing to maintain the molten state of the plastic at the sprue. In order to ensure the temperature of the sprue, the nozzle tip is usually made of beryllium copper metal, which can easily conduct the temperature of the heating seat to the sprue position. However, since the nozzle tip and the valve needle need to be frequently rubbed at the matching position when controlling the opening and closing of the sprue, and the beryllium copper metal has poor wear resistance, the inside of the nozzle tip is severely worn out in the long run. At this time, the valve needle will directly rub the sprue of the sprue bushing, causing the sprue to wear out and the sprue bushing part to be scrapped. If the nozzle tip is made of steel material with good wear resistance, the above-mentioned nozzle tip wear can be greatly improved. However, the thermal conductivity of steel is much worse than that of beryllium copper, and the temperature of the heating seat cannot be efficiently conducted to the sprue, resulting in a low temperature of the sprue. Most plastic products with high requirements for the temperature of the sprue cannot use this scheme. SUMMARY
[0003] The utility model discloses a hot runner nozzle tip structure.
[0004] In order to achieve the above-mentioned utility model purposes, the utility model provides a hot runner nozzle tip structure, which comprises a heating seat, a nozzle tip and a valve needle. The head of the heating seat has a first mounting hole, and the nozzle tip is installed in the first mounting hole. The heating seat covers the nozzle tip, and the nozzle tip is made of beryllium copper metal. The head of the nozzle tip has a second mounting hole, and a nozzle tip insert is installed in the second mounting hole. The nozzle tip insert is made of stainless steel. The center position of the heating seat is provided with a first valve needle hole, the center position of the nozzle tip is provided with a second valve needle hole, and the center position of the nozzle tip insert is provided with a third valve needle hole. The first valve needle hole, the second valve needle hole and the third valve needle hole are communicated. The third valve needle hole has a first guide section, and the head of the valve needle sequentially passes through the first valve needle hole, the second valve needle hole and the third valve needle hole and moves along the first guide section.
[0005] The utility model also has the following characteristics: the nozzle tip insert is in interference fit with the second mounting hole, and the connection between the nozzle tip insert and the nozzle tip is fixed by brazing.
[0006] The utility model also has the following characteristics: the nozzle tip is in threaded connection with the heating seat.
[0007] The first valve needle hole, the second valve needle hole and the third valve needle hole have coaxiality within 0.005.
[0008] The first transition section is arranged between the second valve needle hole and the first guide section.
[0009] The hole diameter of the first transition section to the first guide section gradually decreases.
[0010] The included angle between the first transition section and the axis of the first guide section is 10°-20°.
[0011] The included angle between the first transition section and the axis of the first guide section is 15°.
[0012] The second valve needle hole is provided with a second transition section away from the head, and the hole diameter of the second transition section to the head of the nozzle tip gradually decreases.
[0013] The first valve needle hole is provided with a third transition section close to the nozzle tip, and the hole diameter of the third transition section to the nozzle tip gradually decreases.
[0014] The technical scheme provided by the utility model has the advantages that the nozzle tip is made of beryllium copper metal, has good heat conductivity, and the temperature of the heating seat can be efficiently conducted to the nozzle, the nozzle has fluent glue outflow, is compatible with various plastic products of plastic raw materials, and has wide application range. The nozzle tip insert is made of high-wear-resistant stainless steel, has small friction and wear with the valve needle, and greatly improves the service life of the nozzle tip. Meanwhile, the nozzle tip insert has the first guide section, the valve needle moves along the first guide section, the valve needle head is properly matched with the nozzle, reduces the wear of the nozzle and the valve needle, and improves the service life of the nozzle core. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a schematic view of the hot runner nozzle tip structure of the utility model when the nozzle is closed.
[0016] Figure 2 is a schematic view of the hot runner nozzle tip structure of the utility model when the nozzle is opened.
[0017] Figure 3 is a schematic view of one embodiment of the nozzle tip and the nozzle tip insert in the hot runner nozzle tip structure of the utility model.
[0018] Figure 4 is a schematic view of another embodiment of the nozzle tip and the nozzle tip insert in the hot runner nozzle tip structure of the utility model.
[0019] Figure 5 Figure 1 is a schematic view of one embodiment of the hot runner nozzle tip structure of the present application. DETAILED DESCRIPTION
[0020] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.
[0023] As Figure 1 Figure 5 As shown, a hot runner nozzle tip structure comprises a heating seat 1, a nozzle tip 2, a valve needle 3, the head of the heating seat 1 is provided with a first mounting hole, the nozzle tip 2 is mounted in the first mounting hole, the heating seat 1 covers the nozzle tip 2, the nozzle tip 2 is made of beryllium copper metal; the head of the nozzle tip 2 is provided with a second mounting hole, a nozzle tip insert 4 is mounted in the second mounting hole, the nozzle tip insert 4 is made of stainless steel; the center of the heating seat 1 is provided with a first valve needle hole 5, the center of the nozzle tip 2 is provided with a second valve needle hole 6, the center of the nozzle tip insert 4 is provided with a third valve needle hole 7, the first valve needle hole 5, the second valve needle hole 6 and the third valve needle hole 7 are communicated; the third valve needle hole 7 is provided with a first guide section 8, the head of the valve needle 3 passes through the first valve needle hole 5, the second valve needle hole 6 and the third valve needle hole 7 in sequence and moves along the first guide section 8.
[0024] The nozzle tip 2 is provided with the nozzle tip insert 4, the valve needle 3 passes through the nozzle tip 2 and moves along the first guide section 8 in the nozzle tip insert 4.
[0025] According to an embodiment of the present application, the nozzle tip insert 4 is in interference fit with the second mounting hole, and the connection between the nozzle tip insert 4 and the nozzle tip 2 is fixed by welding.
[0026] According to an embodiment of the present application, the nozzle tip 2 is in threaded connection with the heating seat 1, so that the nozzle tip can be conveniently dismounted and replaced with the nozzle tip insert.
[0027] According to an embodiment of the present application, the coaxiality of the first valve needle hole 5, the second valve needle hole 6 and the third valve needle hole 7 is within 0.005, so that the position precision of the first guide section is improved, the valve needle 3 is guided before being inserted into the nozzle 21, the head of the valve needle 3 is properly matched with the nozzle 21, the wear of the nozzle and the valve needle is reduced, the protection of the nozzle is improved, and the service life of the nozzle insert is further improved.
[0028] According to one embodiment of the utility model, first transition section 9 is arranged on the mouth tip insert piece 4, first transition section 9 is arranged between second valve needle hole 6 and first guide section 8. According to one embodiment of the utility model, the hole diameter of first transition section 9 to first guide section 8 gradually reduces. When valve needle 3 passes through second valve needle hole 6 and is ready to enter first guide section 8, the hole diameter of first transition section 9 gradually reduces, plays a limiting role, further controls the position of valve needle, reduces the friction between valve needle and mouth tip insert piece, reduces the abrasion of mouth tip insert piece. According to one embodiment of the utility model, the included angle between first transition section 9 and the axis of first guide section 8 is 10 °-20 °. The included angle is 10 °-20 °, which can reduce the friction between valve needle and mouth tip insert piece, and according to one embodiment of the utility model, the included angle between first transition section 9 and the axis of first guide section 8 is 15 °.
[0029] According to one embodiment of the utility model, the end of second valve needle hole 6 away from the head is provided with second transition section 10, and the hole diameter of second transition section 10 to the head gradually reduces. By arranging second transition section 10, when valve needle 3 passes through first valve needle hole 5 and is ready to enter second valve needle hole 6, the hole diameter of second transition section 10 gradually reduces, plays a limiting role, controls the position of valve needle, and makes valve needle smoothly enter the mouth tip insert piece, further reducing the abrasion of the mouth tip insert piece.
[0030] According to one embodiment of the utility model, third transition section 11 is arranged at the position close to the mouth tip 2 of first valve needle hole 5, and the hole diameter of third transition section 11 to the mouth tip 2 gradually reduces. By arranging third transition section 11, when valve needle 3 passes through first valve needle hole 5, the hole diameter of third transition section 11 gradually reduces, plays a limiting role, controls the position of valve needle, and makes valve needle smoothly enter the mouth tip.
[0031] In summary, the technical scheme provided by the utility model has the advantages that the mouth tip is made of beryllium copper metal, has good heat conductivity, and the temperature of the heating seat can be efficiently conducted to the nozzle, the nozzle flows smoothly, is compatible with various plastic raw materials of plastic products, and has wide application range. By arranging the mouth tip insert piece at the position of the head of the mouth tip, the valve needle passes through the mouth tip and moves along the first guide section inside the mouth tip insert piece. The mouth tip insert piece is made of high-abrasion-resistant stainless steel, has small friction and abrasion with the valve needle, and greatly improves the service life of the mouth tip. At the same time, the mouth tip insert piece has the first guide section, the valve needle moves along the first guide section, the valve needle is aligned before being inserted into the nozzle, the head of the valve needle is properly matched with the nozzle, reduces the abrasion of the nozzle and the valve needle, and improves the service life of the nozzle core.
[0032] It should be emphasized that: the above is only the preferred embodiment of the present application, not any form of the present application for any restrictions, in accordance with the technical essence of the present application for any simple modification, equivalent changes and modifications of the above examples, still belong to the scope of the present application technical scheme.
Claims
1. A hot runner nozzle tip structure comprising a heating seat (1), a nozzle tip (2), a valve needle (3), characterized in that, The head of the heating seat (1) has a first mounting hole, the tip (2) is mounted in the first mounting hole, the heating seat (1) covers the tip (2), the tip (2) is made of beryllium copper metal; the head of the tip (2) has a second mounting hole, a tip insert (4) is mounted in the second mounting hole, the tip insert (4) is made of stainless steel; the center of the heating seat (1) is provided with a first valve needle hole (5), the center of the tip (2) is provided with a second valve needle hole (6), the center of the tip insert (4) is provided with a third valve needle hole (7), the first valve needle hole (5), the second valve needle hole (6) and the third valve needle hole (7) are communicated; the third valve needle hole (7) has a first guide section (8), the head of the valve needle (3) sequentially passes through the first valve needle hole (5), the second valve needle hole (6) and the third valve needle hole (7) and moves along the first guide section (8).
2. The hot-foil nozzle tip structure of claim 1, wherein The tip insert (4) is in interference fit with the second mounting hole, and the connection between the tip insert (4) and the tip (2) is fixed by brazing.
3. The hot-foil gate tip structure of claim 1, wherein The tip (2) is in threaded connection with the heating seat (1).
4. The hot-foil nozzle tip structure of claim 1, wherein The coaxiality of the first valve needle hole (5), the second valve needle hole (6) and the third valve needle hole (7) is within 0.
005.
5. The hot-foil nozzle tip structure of claim 1, wherein A first transition section (9) is arranged on the tip insert (4), and the first transition section (9) is arranged between the second valve needle hole (6) and the first guide section (8).
6. The hot-foil gate tip structure of claim 5, wherein The hole diameter of the first transition section (9) to the first guide section (8) gradually decreases.
7. The hot-foil gate tip structure of claim 6, wherein The included angle between the first transition section (9) and the axis of the first guide section (8) is 10°-20°.
8. The hot-foil gate tip structure of claim 7, wherein The included angle between the first transition section (9) and the axis of the first guide section (8) is 15°.
9. The hot-foil nozzle tip structure of claim 1, wherein A second transition section (10) is arranged at the end of the second valve needle hole (6) away from the head, and the hole diameter of the second transition section (10) to the head of the tip (2) gradually decreases.
10. The hot-foil nozzle tip structure of claim 1, wherein A third transition section (11) is arranged at the position of the first valve needle hole (5) close to the tip (2), and the hole diameter of the third transition section (11) to the tip (2) gradually decreases.