CN214687727U - Hot nozzle assembly and hot runner system - Google Patents
Hot nozzle assembly and hot runner system Download PDFInfo
- Publication number
- CN214687727U CN214687727U CN202120661445.XU CN202120661445U CN214687727U CN 214687727 U CN214687727 U CN 214687727U CN 202120661445 U CN202120661445 U CN 202120661445U CN 214687727 U CN214687727 U CN 214687727U
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- tip
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- nozzle
- nozzle tip
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Abstract
The utility model discloses a hot nozzle subassembly and hot runner system, hot nozzle subassembly include along the hot mouth of longitudinal axis extension, needle and be located the inboard mouth point device of hot mouth, hot mouth has defined first runner, the mouth point device defined with first runner be linked together the second runner and with the runner that the second runner is linked together, the needle is movably located along the longitudinal axis in order to open or close in first runner and the second runner the runner, the mouth point device include with the last mouth point that hot mouth contacted with has defined the lower mouth point of runner, the hardness of lower mouth point is greater than go up the hardness of mouth point, the thermal conductivity of lower mouth point is less than go up the thermal conductivity of mouth point, go up the integrative setting of mouth point and lower mouth point non-detachably. The utility model discloses make the sharp device of mouth not only guaranteed the heat conductivity, but also more wear-resisting and non-deformable, and be convenient for install.
Description
Technical Field
The utility model relates to a hot runner mold field especially relates to a hot mouth subassembly and hot runner system.
Background
The hot nozzle assembly generally includes a hot nozzle, a nozzle tip disposed in the hot nozzle, and a valve pin, wherein the valve pin is driven to reciprocate in a flow channel formed by the hot nozzle and the nozzle tip, so as to open or close a gate formed on the nozzle tip for injecting glue or stopping injecting glue, and the valve pin impacts the nozzle tip during movement of the valve pin. However, in order to maintain good fluidity of the injected material, the molten material needs to be maintained at a certain temperature. To achieve the above purpose, the tip is usually made of a material having good thermal conductivity. But because of the material with good heat conductivity, the hardness is lower, the wear resistance is not good, and the deformation is easy. However, if a material with high hardness is used, the thermal conductivity cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hot mouth subassembly and hot runner system for the installation of having both guaranteed the heat conductivity, wear-resisting and non-deformable more again and being convenient for of mouth point device.
To achieve one of the above objects, an embodiment of the present invention provides a hot nozzle assembly including a hot nozzle extending along a longitudinal axis, a valve needle, and a tip device located inside the hot nozzle, the hot nozzle defining a first flow passage, the tip device defining a second flow passage communicating with the first flow passage and a gate communicating with the second flow passage, the valve needle being movably disposed in the first flow passage and the second flow passage along the longitudinal axis to open or close the gate, wherein,
the nozzle tip device comprises an upper nozzle tip in contact with the hot nozzle and a lower nozzle tip defining the pouring gate, the hardness of the lower nozzle tip is greater than that of the upper nozzle tip, the thermal conductivity of the lower nozzle tip is less than that of the upper nozzle tip, and the upper nozzle tip and the lower nozzle tip are integrally arranged in an undetachable mode.
As a further improvement of an embodiment of the present invention, the upper tip and the lower tip are printed in one body by 3D printing.
As a further improvement of an embodiment of the present invention, the upper tip and the lower tip are integrally welded.
As a further improvement of an embodiment of the present invention, the hot nozzle assembly further includes a pressing cap fixedly connected to the inner side of the hot nozzle through a screw thread, and in the extending direction of the longitudinal axis, the pressing cap abuts against the upper nozzle tip, so as to fix the nozzle tip device to the inner side of the hot nozzle.
As a further improvement of an embodiment of the present invention, in the extending direction of the longitudinal axis, the tip of the lower nib protrudes from the tip of the pressing cap.
As a further improvement of an embodiment of the present invention, the lower nib is away from the pressing cap.
As a further improvement of an embodiment of the present invention, the lower tip is made of tungsten steel.
To achieve one of the above objects, an embodiment of the present invention further provides a hot runner system including a hot nozzle assembly for pouring plastic in a molten state, the hot nozzle assembly including a hot nozzle extending along a longitudinal axis, a valve needle, and a nozzle tip device located inside the hot nozzle, the hot runner system further including a driving unit for driving the valve needle to reciprocate along the longitudinal axis, the hot nozzle defining a first flow passage, the nozzle tip device defining a second flow passage communicating with the first flow passage and a gate communicating with the second flow passage, the valve needle being drivingly movable in the first flow passage and the second flow passage along an extending direction of the longitudinal axis to open or close the gate, the hot runner system being characterized in that,
the nozzle tip device comprises an upper nozzle tip and a lower nozzle tip, wherein the upper nozzle tip is in contact with the hot nozzle, the lower nozzle tip defines the pouring gate, the hardness of the lower nozzle tip is greater than that of the upper nozzle tip, the thermal conductivity of the lower nozzle tip is smaller than that of the upper nozzle tip, and the upper nozzle tip and the lower nozzle tip are integrally arranged in an undetachable mode.
As a further improvement of an embodiment of the present invention, the upper tip and the lower tip are printed in one body by 3D printing.
As a further improvement of an embodiment of the present invention, the upper tip and the lower tip are integrally welded.
Compared with the prior art, the beneficial effects of the utility model reside in that: because the upper tip and the lower tip are made of different materials, the hardness of the lower tip is higher than that of the upper tip, and the thermal conductivity of the lower tip is lower than that of the upper tip. The upper nozzle tip is subjected to heat transfer, the flowability of the molten material is guaranteed, the valve needle impacts the lower nozzle tip when moving downwards, the hardness of the lower nozzle tip is high, and the valve needle is more wear-resistant and is not easy to deform. In addition, because go up the integrative setting of tip and lower tip non-detachably, when installing, with go up the tip of the integrative tip device that constitutes of tip and lower tip in hot mouth inboard can to sum up to make the tip device not only guaranteed the heat conductivity, but also more wear-resisting and non-deformable in the time, be convenient for more the installation.
Drawings
FIG. 1 is a schematic longitudinal sectional view of a hot nozzle assembly according to an embodiment of the present invention;
FIG. 2 is a schematic longitudinal cross-sectional view of a hot nozzle assembly according to an embodiment of the present invention, with the valve needle removed;
fig. 3 is a partially enlarged schematic view at a in fig. 2.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all included in the scope of the present invention.
In the various illustrations of the present application, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for ease of illustration and, thus, are provided to illustrate only the basic structure of the subject matter of the present application.
In the description of the embodiments of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner" and "outer" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are generally referred to with reference to the thermal nozzle assembly in a normal mounting state, and do not indicate that the indicated position or element must have a specific orientation.
As shown in fig. 1, fig. 2 and fig. 3, the utility model discloses a hot nozzle assembly's a preferred embodiment, an embodiment of the utility model provides a hot runner system, hot runner system include hot nozzle assembly, temperature control box and form the hot runner in hot nozzle assembly at least, through the means to injecting glue material heating and control by temperature change, with molten state's plastics in proper order through pouring into the die cavity of mould behind hot nozzle assembly, avoid the formation of the casting system congeals material.
Specifically, the hot nozzle assembly is used for pouring plastic in a molten state, the hot nozzle assembly comprises a hot nozzle 7 extending along a longitudinal axis 5, a valve needle 9 and a nozzle tip device 11 positioned on the inner side of the hot nozzle 7, the hot runner system further comprises a driving unit (not shown) for driving the valve needle 9 to reciprocate along the longitudinal axis 5, the hot nozzle 7 and the nozzle tip device 11 are both provided with hollow structures, the hot nozzle 7 defines a first flow passage 13, the nozzle tip device 11 defines a second flow passage 15 communicated with the first flow passage 13 and a pouring gate 17 communicated with the second flow passage 15, and the valve needle 9 can be driven to move in the first flow passage 13 and the second flow passage 15 along the extending direction of the longitudinal axis 5 so as to open or close the pouring gate 17.
In the present embodiment, the nozzle assembly has a central axis, and for clarity of location and orientation described in this application, reference is generally made to upstream and downstream of the hot runner in the nozzle assembly, and the direction from upstream to downstream of the hot runner along the central axis is defined as "lower" and vice versa as "upper". The injection molding material first enters the first runner 13 defined by the hot nozzle 7, then flows downwards into the second runner 15, and finally flows out of the gate 17 to be injected into the cavity of the mold for casting. When the pouring is stopped, the valve pin 9 is driven to move downward to close the gate 17. In the present preferred embodiment, the gate 17 is disposed coaxially with the first flow channel 13 and the second flow channel 15. Of course, the extension axis of the gate 17 may be arranged to form an angle with the extension axes of the first flow channel 13 and the second flow channel 15, and in this case, the gate 17 may be arranged to be one, or two or more.
Further, the tip device 11 includes an upper tip 19 in contact with the hot nozzle 7 and a lower tip 21 defining the gate 17, the lower tip 21 having a hardness greater than that of the upper tip 19, and the lower tip 21 having a thermal conductivity less than that of the upper tip 19. The upper tip 19 defines part of the second flow channel 15, the lower tip 21 defines part of the second flow channel 15, and the molten molding material flows out of the first flow channel 13, first into the upper tip 19, then into the lower tip 21, and finally out through the gate 17. In addition, the upper tip 19 and the lower tip 21 are integrally provided undetachably.
In the preferred embodiment, because the upper tip 19 and the lower tip 21 are made of different materials, the hardness of the lower tip 21 is greater than that of the upper tip 19, and the thermal conductivity of the lower tip 21 is less than that of the upper tip 19. The upper nozzle tip 19 is subjected to heat transfer, the fluidity of the molten material is ensured, the valve needle 9 impacts the lower nozzle tip 21 when moving downwards, and the lower nozzle tip 21 is high in hardness, more wear-resistant and less prone to deformation. In addition, because the upper nozzle tip 19 and the lower nozzle tip 21 are arranged integrally in an undetachable manner, when the nozzle tip device 11 integrally formed by the upper nozzle tip 19 and the lower nozzle tip 21 is assembled on the inner side of the hot nozzle 7, so that the nozzle tip device 11 is more convenient to install while ensuring the thermal conductivity and being more wear-resistant and less prone to deformation.
Further, the upper tip 19 and the lower tip 21 are integrated by 3D printing. Of course, the upper tip 19 and the lower tip 21 may be integrally formed by welding. The upper tip 19 and the lower tip 21 may be integrally provided together by adhesion or the like.
In the direction of extension of the longitudinal axis 5, the upper end of the upper tip 19 abuts the hot mouth 7. The hot nozzle assembly further comprises a pressing cap 23 fixedly connected to the hot nozzle 7, in the preferred embodiment the pressing cap 23 is fixedly connected to the inner side of the hot nozzle 7 by means of a screw thread, and in the extension direction of the longitudinal axis 5 the pressing cap 23 abuts against the upper nozzle tip 19 to fix the nozzle tip device 11 to the inner side of the hot nozzle 7. Specifically, the upper tip 19 has an outer boss 25 extending outward in the circumferential direction, and the upper end portion of the pressing cap 23 abuts against the outer boss 25, thereby restricting the movement of the upper tip 19 in the axial direction. The press cap 23 is usually made of W302 grinding steel, however, the press cap 23 may be made of other materials, and the press cap 23 is used to fix the tip device 11 to the hot nozzle 7.
In addition, the lower end of the lower tip 21 projects beyond the lower end of the pressure cap 23 in the direction of extension of the longitudinal axis 5. The lower end surface of the upper tip 19 is butted against the upper end surface of the lower tip 21, that is, the lower end surface of the upper tip 19 is abutted against the upper end surface of the lower tip 21. Specifically, the lower end surface of the upper tip 19 is perpendicular to the longitudinal axis 5, and the upper end surface of the lower tip 21 is also perpendicular to the longitudinal axis 5.
Further, the lower beak tip 21 is away from the pressing cap 23. The lower spout tip 21 has no contact with the pressing cap 23. In particular, in the circumferential direction perpendicular to the longitudinal axis 5, the lower tip 21 and the pressure cap 23 have a clearance that ensures the overall temperature of the tip device 11 and reduces the heat transfer to the pressure cap 23.
The lower tip 21 has an inner cylindrical surface 27 forming the gate 17 and an inner conical surface 29 connected to the inner cylindrical surface 27, the inner conical surface 29 being adjacent to the upper tip 19. A certain clearance is provided between the inner conical surface 29 and the valve needle 9 in the circumferential direction, so that a certain clearance is ensured between the upper nozzle tip 19 and the valve needle 9 in the circumferential direction, heat is not transferred to the valve needle 9, and the valve needle 9 is not deformed.
In the preferred embodiment, the lower tip 21 is made of tungsten steel, which is hard, but the lower tip 21 may be made of other hard materials. The upper tip 19 is made of copper with good thermal conductivity, and of course, other materials with good thermal conductivity can be used for the upper tip 19.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A hot nozzle assembly comprising a hot nozzle extending along a longitudinal axis, a valve pin, and a tip device located inside the hot nozzle, the hot nozzle defining a first flow passage, the tip device defining a second flow passage in communication with the first flow passage and a gate in communication with the second flow passage, the valve pin being movably disposed within the first and second flow passages along the longitudinal axis to open or close the gate,
the nozzle tip device comprises an upper nozzle tip in contact with the hot nozzle and a lower nozzle tip defining the pouring gate, the hardness of the lower nozzle tip is greater than that of the upper nozzle tip, the thermal conductivity of the lower nozzle tip is less than that of the upper nozzle tip, and the upper nozzle tip and the lower nozzle tip are integrally arranged in an undetachable mode.
2. The hot nozzle assembly of claim 1, wherein the upper and lower nozzle tips are integrated by 3D printing.
3. The hot nozzle assembly of claim 1, wherein the upper tip and the lower tip are integrally formed by welding.
4. A hot nozzle assembly according to claim 1, further comprising a pressing cap fixedly attached to the inside of the hot nozzle by threads, and wherein the pressing cap abuts the upper nozzle tip in the direction of extension of the longitudinal axis to secure the nozzle tip device to the inside of the hot nozzle.
5. A hot nozzle assembly according to claim 4, wherein the distal end of the lower nozzle tip protrudes beyond the distal end of the gland in the direction of extension of the longitudinal axis.
6. The hot nozzle assembly of claim 4, wherein the lower nozzle tip is distal from the gland.
7. The hot nozzle assembly of claim 1, wherein the lower nozzle tip is tungsten steel.
8. A hot-runner system including a hot-nozzle assembly for pouring a plastic in a molten state, the hot-nozzle assembly including a hot nozzle extending along a longitudinal axis, a valve pin, and a tip device located inside the hot nozzle, the hot-runner system further including a drive unit for driving the valve pin to reciprocate along the longitudinal axis, the hot nozzle defining a first flow passage, the tip device defining a second flow passage communicating with the first flow passage and a gate communicating with the second flow passage, the valve pin being drivingly movable within the first and second flow passages in a direction extending along the longitudinal axis to open or close the gate,
the nozzle tip device comprises an upper nozzle tip and a lower nozzle tip, wherein the upper nozzle tip is in contact with the hot nozzle, the lower nozzle tip defines the pouring gate, the hardness of the lower nozzle tip is greater than that of the upper nozzle tip, the thermal conductivity of the lower nozzle tip is smaller than that of the upper nozzle tip, and the upper nozzle tip and the lower nozzle tip are integrally arranged in an undetachable mode.
9. The hot-runner system of claim 8, wherein the upper and lower tips are integrated by 3D printing.
10. The hot-runner system of claim 8, wherein the upper tip and the lower tip are integrally formed by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120661445.XU CN214687727U (en) | 2021-03-31 | 2021-03-31 | Hot nozzle assembly and hot runner system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120661445.XU CN214687727U (en) | 2021-03-31 | 2021-03-31 | Hot nozzle assembly and hot runner system |
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| Publication Number | Publication Date |
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| CN214687727U true CN214687727U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120661445.XU Active CN214687727U (en) | 2021-03-31 | 2021-03-31 | Hot nozzle assembly and hot runner system |
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| CN (1) | CN214687727U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112895334A (en) * | 2021-03-31 | 2021-06-04 | 柳道万和(苏州)热流道系统有限公司 | Hot nozzle assembly and hot runner system |
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2021
- 2021-03-31 CN CN202120661445.XU patent/CN214687727U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112895334A (en) * | 2021-03-31 | 2021-06-04 | 柳道万和(苏州)热流道系统有限公司 | Hot nozzle assembly and hot runner system |
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