CN105751434B - The nozzle of injection machine - Google Patents
The nozzle of injection machine Download PDFInfo
- Publication number
- CN105751434B CN105751434B CN201610238076.7A CN201610238076A CN105751434B CN 105751434 B CN105751434 B CN 105751434B CN 201610238076 A CN201610238076 A CN 201610238076A CN 105751434 B CN105751434 B CN 105751434B
- Authority
- CN
- China
- Prior art keywords
- nozzle
- centre bore
- injection machine
- pit
- row
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/20—Injection nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of nozzle of injection machine, and it includes centre bore (1), and the hole wall of centre bore (1) is evenly distributed with multiple circular pits (2) or is evenly distributed with the groove that multiple tracks cross section is circular arc.The nozzle of the injection machine can effectively reduce the flow resistance of melt, reduce the pressure loss.
Description
Technical field
The present invention relates to injection-moulding device field, is especially a kind of nozzle of injection machine.
Background technology
Injection molding due to possess efficiently, high quality the advantages that be widely used in the manufacturings of plastic products.Injection
During machine injection molding, melt is pumped through reaching die cavity after nozzle, sprue, runner and cast gate by barrel, and melt flows through
The pressure loss can constantly occur during stating structure, can be by larger flow resistance, pressure especially when flowing through nozzle
Lose larger, cause melt mold filling not abundant enough so that defect occurs for the product after shaping.Moreover, micro injection molding in recent years
Technology is using more and more extensive, and the resistance of polymeric melt in micro injection molding mold filling is bigger, and so, the pressure loss is to melt at nozzle
Mold filling is more unfavorable, and the problem of how reducing the pressure loss at nozzle as far as possible just becomes further crucial and urgent.
And the pressure loss at nozzle is caused mainly due to the friction between melt and the hole wall in nozzle center hole,
So the hole wall in nozzle center hole is always set more smooth by row those skilled in the art as far as possible, to reduce pressure
Loss, however, finding in actual use, effect and unobvious.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of flow resistance that can effectively reduce melt, reduces pressure damage
The nozzle of the injection machine of mistake.
The technical solution of the present invention is to provide a kind of nozzle of injection machine, and it includes centre bore, the hole wall of centre bore
It is evenly distributed with multiple circular pits or is evenly distributed with the groove that multiple tracks cross section is circular arc.
Using above structure injection machine nozzle compared with prior art, there is advantages below.
The present invention abolishes the smaller technology prejudice of the more smooth resistance of conventional thought, creatively proposes to set in centre bore and justifies
Shape pit or the groove that cross section is circular arc, so, melt generates secondary vortex in pit or groove, and be vortexed
Rotation direction is towards the direction for being advantageous to melt flows, and the presence being vortexed not contact directly with hole wall during melt flows, plays
The effect of roller or roller bearing so that the sliding friction between melt and nozzle center's hole hole wall becomes rolling friction, effectively
Flow resistance is reduced, reduces the pressure loss that melt flows through nozzle, is advantageous to mold filling.
As an improvement, multiple pits arrange in row, multiple pits of each row are uniformly distributed, the center of circle of each row's pit
Angle between line and the radial development direction X of centre bore is 20 ° ± 5 °, and above-mentioned design has clever thought, if according to normal
Advise thinking pit line is vertical namely parallel with the radial development direction X of centre bore with melt flows direction, then in every row
The interval melt of pit acts on again without the drag reduction of secondary vortex, before being designed to that tilt distribution allows for melt in nozzle
During entering, pit between row and row almost without dead angle, proceed to any position and all subtracted in the presence of a pit convection body
Resistance, its drag-reduction effect is more preferable, further reduces the pressure loss.
As improving again, the ratio of the gross area of whole pits and the surface area of centre bore hole wall is the ﹪ of 30 ﹪~50, so
Area ratio drag-reduction effect more preferably.
As also improving, the depth h and diameter d of each pit ratio are 0.25~0.5, and such ratio causes caused
The volume of secondary vortex is just right, more effective drag reduction.
As a further improvement, distance is equal between every two adjacent grooves, the center line and centre bore of every groove
Radial development direction X between angle be 20 ° ± 5 °, so, tilt distribution is allowed for during melt advances in nozzle,
Almost without dead angle between adjacent grooves, proceed to any position and a groove convection body progress drag reduction, its drag-reduction effect all be present
More preferably, the pressure loss is further reduced.
Brief description of the drawings
Fig. 1 is the structural representation of the nozzle of injection machine of the present invention.
Fig. 2 is the half section schematic of the nozzle of injection machine of the present invention.
Fig. 3 is the partial structural diagram after the expansion of the centre bore hole wall with pit of the nozzle of injection machine of the present invention.
Fig. 4 is along the cross section structure diagram in A-A directions in Fig. 3.
Fig. 5 is the pit drag principle schematic diagram of the nozzle of injection machine of the present invention.
Fig. 6 is the partial structural diagram after the centre bore hole wall with groove expansion of the nozzle of injection machine of the present invention.
1, centre bore shown in figure, 2, pit, 3, groove, X, the radial development direction of centre bore, d, the diameter of pit, h,
The depth of pit.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, the nozzle of injection machine of the present invention, it includes centre bore 1, centre bore
1 hole wall is evenly distributed with multiple circular pits 2 or is evenly distributed with the groove 3 that multiple tracks cross section is circular arc.
If what hole wall was set is pit 2, multiple pits 2 are arranged in row, and multiple pits 2 of each row are uniformly distributed, often
Angle between the line in the center of circle of one row's pit 2 and the radial development direction X of centre bore 1 is 20 ° ± 5 °.Whole pits 2
The ratio of the surface area of the gross area and the hole wall of centre bore 1 is the ﹪ of 30 ﹪~50.The depth h and diameter d of each pit 2 ratio are 0.25
~0.5, and d span is 100 microns to 200 microns.
If what hole wall was set is groove 3, distance is equal between every two adjacent grooves 3, the center line of every groove 3
Angle between the radial development direction X of centre bore 1 is 20 ° ± 5 °.
Claims (3)
1. a kind of nozzle of injection machine, it includes centre bore (1), it is characterised in that：The hole wall of centre bore (1) is evenly distributed with more
Individual circular pit (2), the span that the depth h and diameter d of each pit (2) ratio is 0.25~0.5, d be 100 microns extremely
200 microns.
2. the nozzle of injection machine according to claim 1, it is characterised in that：Multiple pits (2) arrange in row, each row's
Multiple pits (2) are uniformly distributed, between the line in the center of circle of each row's pit (2) and the radial development direction X of centre bore (1)
Angle is 20 ° ± 5 °.
3. the nozzle of injection machine according to claim 1, it is characterised in that：The gross area and centre bore of whole pits (2)
(1) ratio of the surface area of hole wall is the ﹪ of 30 ﹪~50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610238076.7A CN105751434B (en) | 2016-04-15 | 2016-04-15 | The nozzle of injection machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610238076.7A CN105751434B (en) | 2016-04-15 | 2016-04-15 | The nozzle of injection machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105751434A CN105751434A (en) | 2016-07-13 |
| CN105751434B true CN105751434B (en) | 2018-02-16 |
Family
ID=56334012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610238076.7A Active CN105751434B (en) | 2016-04-15 | 2016-04-15 | The nozzle of injection machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105751434B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126193B (en) * | 2019-05-17 | 2020-07-24 | 北京化工大学 | Ultrahigh molecular weight polyethylene choked flow type porous injection molding nozzle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4906360A (en) * | 1989-02-28 | 1990-03-06 | Panos Trakas | Multi-stage injection molding filter |
| JP3977681B2 (en) * | 2002-05-01 | 2007-09-19 | 住友重機械工業株式会社 | Injection nozzle |
| CN203449536U (en) * | 2013-08-20 | 2014-02-26 | 成都市联余精密机械有限公司 | Three-way type glue feeding nozzle |
| CN204585707U (en) * | 2015-05-05 | 2015-08-26 | 宁波巴斯顿机械科技有限公司 | A kind of colour mixture is penetrated and is chewed |
-
2016
- 2016-04-15 CN CN201610238076.7A patent/CN105751434B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4906360A (en) * | 1989-02-28 | 1990-03-06 | Panos Trakas | Multi-stage injection molding filter |
| JP3977681B2 (en) * | 2002-05-01 | 2007-09-19 | 住友重機械工業株式会社 | Injection nozzle |
| CN203449536U (en) * | 2013-08-20 | 2014-02-26 | 成都市联余精密机械有限公司 | Three-way type glue feeding nozzle |
| CN204585707U (en) * | 2015-05-05 | 2015-08-26 | 宁波巴斯顿机械科技有限公司 | A kind of colour mixture is penetrated and is chewed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105751434A (en) | 2016-07-13 |
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| GR01 | Patent grant |