CN104816431A - Hot runner spray nozzle - Google Patents
Hot runner spray nozzle Download PDFInfo
- Publication number
- CN104816431A CN104816431A CN201510194827.5A CN201510194827A CN104816431A CN 104816431 A CN104816431 A CN 104816431A CN 201510194827 A CN201510194827 A CN 201510194827A CN 104816431 A CN104816431 A CN 104816431A
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- China
- Prior art keywords
- runner
- section
- hot
- feed zone
- jet segment
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Abstract
The invention relates to a hot runner spray nozzle. The hot runner spray nozzle comprises a spray nozzle body and a runner that axially penetrates the spray nozzle, the runner sequentially comprises a feeding section, a spraying section and a pressure maintaining section along a melt flowing direction, the pressure maintaining section extends to outside of an end of the spray nozzle body, the diameter of section of the pressure maintaining section is equal to that of an outlet end of the spraying section, and a thermal insulation device which wraps the pressure maintaining section is arranged on outer wall of the pressure maintaining section. According to the hot runner spray nozzle, the pressure maintaining section is arranged so that viscoelastic effect of a melt at the outlet end and eddy current loss can be avoided, and the runner can be stabilized.
Description
Technical field
The invention belongs to injection machine accessory field, particularly relate to a kind of hot-runner nozzle.
Background technology
Injection mo(u)lding is the main forming method of plastics, is characterized in that production efficiency is high, strong to the flexibility (adaptability) of operation of various plastics, and energy forming shape is complicated, accurate in size injecting products, and application is extensive.Its production process is: first the solid plastics of granular (or powdery) is plastified into the plastic melt that the plasticity with uniform density, viscosity and composition is good, inject enter in the die cavity of mould by applying certain pressure and making this kind of plastic melt possess certain flow rate again, after plastic melt cooling and shaping, just can obtain the plastic products consistent with die profile.
In injection mold system be by nozzle by the material injection sent here by barrel in mould.Existing nozzle mostly is tubulose, and inside is axial runner, and material advances runner to spray through jet hole by screw rod.Existing nozzle is when spraying, and melt is under high pressure through jet expansion ejection, and swiftly flowing melt can produce viscoelastic effect and eddy current loss at jet hole place, affects the shaping of product, can not stablize runner.
Summary of the invention
For solving the problems of the technologies described above, the object of this invention is to provide the nozzle that a kind of melt spray is comparatively stablized, prevented melt from refluxing.
Hot-runner nozzle of the present invention, comprise nozzle body and the axial runner running through described nozzle, it is characterized in that: described runner comprises feed zone, jet segment and pressurize section successively along the direction of melt flows, described pressurize section stretches out described nozzle body end, the diameter of section of described pressurize section and the equal diameters of the described jet segment port of export, described pressurize section outer wall is provided with the attemperator of parcel pressurize section.
Further, described feed zone is narrow trend gradually to the end of described jet segment from its end, and the inwall of described feed zone is provided with screw thread.
Further, the outer wall of described nozzle body is provided with heater in described feed zone place.
Further, the axial length of described pressurize section is 0.6 ~ 0.9 of described jet segment axial length.
Further, the axial length of described feed zone is 1/5 of described jet segment axial length.
Further, described attemperator is the heat-insulation layer be made up of asbestos.
Further, described heater is for being wrapped in resistance heating collar on described nozzle body outer wall.
Hot-runner nozzle of the present invention, by being provided with pressurize section, being avoided melt to produce viscoelastic effect and eddy current loss at the port of export, is made its stable runner.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of description, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
See Fig. 1, hot-runner nozzle of the present invention, comprise nozzle body 10 and the axial runner running through described nozzle, runner in the present invention comprises feed zone 21, jet segment 22 and pressurize section 23 successively along the direction of melt flows, pressurize section 23 stretches out nozzle body 10 end, and the equal diameters of the diameter of section of pressurize section 23 and jet segment 22 port of export, pressurize section 23 outer wall is provided with the attemperator 30 of parcel pressurize section 23.Hot-runner nozzle of the present invention is by setting up pressurize section 23 in jet segment 22 front end, during injection, melt enters jet segment 22 from feed zone 21 under pressure, now, melt pressure in jet segment 22 is larger, can to spray to jet segment 22 port of export at a high speed, cross section because of jet segment 22 port of export is taper, if now direct injection by jet segment 22 enters in mould, then can produce viscoelastic effect and eddy current loss at jet segment 22 port of export place, and melt enters pressurize section 23 through jet segment 22 in the present invention, the melt fallen in melt and the eddy current loss of the viscoelastic effect of jet segment 22 port of export generation enters in pressurize section 23 again under the effect of the pressure, melt in pressurize section 23 with pencil high speed injection in mould, thus avoid melt to produce viscoelastic effect and eddy current loss at the port of export, make its stable runner.
In addition, nozzle body 10 arranges the attemperator 30 of parcel pressurize section 23, can injection temperation be guaranteed.Because of pressurize section 23 is directly directly contact with ice-cold mould foremost, ice-cold mould is easy to melt temperature is reduced, cause injection temperation defective, affect the mechanical property of finished product, therefore, the injection temperation that attemperator can guarantee melt is set, makes melt homogeneous temperature in whole runner.In the present invention, attemperator 30 is the heat-insulation layer be made up of asbestos, is directly wrapped on nozzle body 10.
Preferably, in the present invention, the axial length of pressurize section 23 is 0.6 ~ 0.9 of jet segment 22 axial length, arranges this length ratio, can guarantee that melt enters the pressure after pressurize section 23 by jet segment 22, and the melt be convenient in pressurize section 23 sprays in mould.
In the present invention, feed zone 21 is narrow trend gradually to the end of jet segment 22 from its end, screw thread 24 is provided with at the inwall of feed zone 21, so, melt is when being injected by feed zone 21, melt contacts is to screw thread 24, along the spiral trend of screw thread 24, produce the power of vortex, so that melt enters in jet segment 22 more rapidly.
Preferably, the axial length of feed zone 21 can be set to 1/5 of jet segment 21 axial length, pile up because the too short meeting of runner makes melt produce when spraying, produce adverse current, impact is sprayed, and runner is long, the expulsion pressure of melt can be affected, when the length of feed zone 21 axis is 1/5 of jet segment 22 length, can avoids dripping glue, also ensure that the expulsion pressure of melt simultaneously.
Further, on the outer wall of nozzle body 10, heater 40 can be set in feed zone 21 place, heater 40 for being wrapped in resistance heating collar on nozzle body 10 outer wall, to guarantee the temperature of melt in whole runner.
The above is only the preferred embodiment of the present invention; be not limited to the present invention; should be understood that; for those skilled in the art; under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (7)
1. a hot-runner nozzle, comprise nozzle body and the axial runner running through described nozzle, it is characterized in that: described runner comprises feed zone, jet segment and pressurize section successively along the direction of melt flows, described pressurize section stretches out described nozzle body end, the diameter of section of described pressurize section and the equal diameters of the described jet segment port of export, described pressurize section outer wall is provided with the attemperator of parcel pressurize section.
2. hot-runner nozzle according to claim 1, is characterized in that: described feed zone is narrow trend gradually to the end of described jet segment from its end, and the inwall of described feed zone is provided with screw thread.
3. hot-runner nozzle according to claim 2, is characterized in that: the outer wall of described nozzle body is provided with heater in described feed zone place.
4. hot-runner nozzle according to claim 3, is characterized in that: the axial length of described pressurize section is 0.6 ~ 0.9 of described jet segment axial length.
5. hot-runner nozzle according to claim 4, is characterized in that: the axial length of described feed zone is 1/5 of described jet segment axial length.
6. hot-runner nozzle according to claim 5, is characterized in that: described attemperator is the heat-insulation layer be made up of asbestos.
7. hot-runner nozzle according to claim 6, is characterized in that: described heater is for being wrapped in resistance heating collar on described nozzle body outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194827.5A CN104816431A (en) | 2015-04-23 | 2015-04-23 | Hot runner spray nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194827.5A CN104816431A (en) | 2015-04-23 | 2015-04-23 | Hot runner spray nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104816431A true CN104816431A (en) | 2015-08-05 |
Family
ID=53727028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510194827.5A Pending CN104816431A (en) | 2015-04-23 | 2015-04-23 | Hot runner spray nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104816431A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040191354A1 (en) * | 2003-03-31 | 2004-09-30 | Baresich Frank J. | Injection molding nozzle structured for cooling at extreme tip |
| CN101274477A (en) * | 2007-03-30 | 2008-10-01 | 富士能株式会社 | Stringing preventing member and injection molding apparatus |
-
2015
- 2015-04-23 CN CN201510194827.5A patent/CN104816431A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040191354A1 (en) * | 2003-03-31 | 2004-09-30 | Baresich Frank J. | Injection molding nozzle structured for cooling at extreme tip |
| CN101274477A (en) * | 2007-03-30 | 2008-10-01 | 富士能株式会社 | Stringing preventing member and injection molding apparatus |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150805 |
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| RJ01 | Rejection of invention patent application after publication |