CN105936108A - Passive needle valve for annularly ejecting sprue - Google Patents
Passive needle valve for annularly ejecting sprue Download PDFInfo
- Publication number
- CN105936108A CN105936108A CN201610249875.4A CN201610249875A CN105936108A CN 105936108 A CN105936108 A CN 105936108A CN 201610249875 A CN201610249875 A CN 201610249875A CN 105936108 A CN105936108 A CN 105936108A
- Authority
- CN
- China
- Prior art keywords
- valve
- needle
- hole
- valve element
- spring
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 2
- 238000003032 molecular docking Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000007363 ring formation reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A passive needle valve for annularly ejecting a sprue comprises a valve nozzle, a valve body and a valve element, wherein the valve element comprises a valve element body, a valve needle, a pushing rod, a spring, a valve element cover and the like; at least two flow distributing channels, which are circumferentially uniformly distributed, are arranged on the valve element; step-shaped through holes are formed in the centers of the valve element body and the valve element cover; the step-shaped through hole in the valve element cover is abutted with the step-shaped through hole in the valve element body so as to form a chamber in which the spring is arranged; the valve needle is arranged into the step-shaped through hole in the valve element body; the pushing rod is arranged into the step-shaped through hole in the valve element cover, and one end of the pushing rod extends out of the valve element cover; the valve nozzle sleeves one end, close to the valve needle, of the valve element; the valve body sleeves the other end of the valve element; and a channel is formed from a small hole end of the valve body to a central ejecting port of the valve nozzle. According to the passive needle valve for annularly ejecting the sprue, the sealed spring chamber is formed, and the spring is separated from a flowing channel, so that the flowing resistance of the flowing channel in the passive needle valve for annularly ejecting the sprue can be reduced, the color changing performance can be improved, and the service life of the needle valve can be prolonged.
Description
Technical field
The present invention relates to a kind of needle-valve, particularly relate to a kind of needle-valve for injection moulding field.
Background technology
Ring penetrates cast gate passive pin valve spring as energy-storage travelling wave tube, opens valve when needle outwards ejects, molten
Material is laterally to enter the mode of watering to fill die cavity with annular at cast gate, and the mode of this Open valve is conducive to eliminating
And improve the defect that injecting products occurs near cast gate.For the cylinder needle-valve being widely used, due to very
The positional precision that difficult control needle ejects, the needle-valve with pushing method Open valve is the most rarely found at present.But
Find during use that ring is penetrated cast gate passive pin valve and had the following disadvantages, be difficult to change by existing technical scheme
Enter:
The most existing ring penetrates short very than direct projection cast gate passive pin valve in the service life of cast gate passive pin valve
Many.Main cause is that the spring in needle-valve does not isolates from runner, and operationally high temperature is high
The melt of pressure, directly through spring, causes spring to be quickly invalidated.This needle-valve is used to need the most more
Change spring, add production cost.
The most existing ring penetrates the flow resistance of runner in cast gate passive pin valve, and greatly, stagnant shots is a lot, in injection
Cannot colour changing in production.
The most existing ring penetrates the enabling pressure (can be with the injection pressure force value of Open valve) of cast gate passive pin valve
Mainly determined by the parameter of spring and the gate diameter of needle-valve, in the case of spring parameter is constant, water
The least required enabling pressure of mouth is the biggest, and door closing force is then determined by spring parameter.If requiring to protect
Card has certain door closing force, then cannot provide the needle-valve that cast gate is less, and increase enabling pressure meeting
Increase the pressure loss of melt.When producing some product that need not high injection pressure, it is only
Improve injection pressure for Open valve, virtually add production cost.
Summary of the invention
It is an object of the invention to the deficiency overcome in prior art, it is provided that the flow resistance of a kind of runner is little,
Colour changing is good, the ring of length in service life penetrates cast gate passive pin valve.
The purpose of the present invention is achieved by following technical proposals:
The ring of the present invention penetrates cast gate passive pin valve, and including valve nozzle, valve body and spool, described spool is by valve
Core body, needle, push rod, spring and cartridge cover etc. form, and spool is provided with at least two circumferences and is uniformly distributed
Sub-runner；Described valve core and the center of cartridge cover are respectively provided with ladder hole, the shoulder hole of cartridge cover with
The shoulder hole of valve core docks thus forms a cavity, is called spring housing；Described spring is arranged at this chamber
In body, one end of spring is takeed on against the hole of valve core；Described needle is arranged in the shoulder hole of valve core；
Described push rod is arranged in the shoulder hole of cartridge cover, and its one end is stretched out outside cartridge cover.Thus, valve core,
Needle, push rod, spring and cartridge cover etc. are assembled into parts, i.e. spool.
Described valve nozzle is sheathed on spool by needle one end；Described valve body center is provided with and smoothly transits from macropore
To the through hole of aperture, valve body is sheathed on the other end of spool, from the central feed injection of the small bore end of valve body to valve nozzle
Mouth composition path.
Wherein, described sub-runner is unspliced, but is made up of a part.
Described valve core and cartridge cover are docking together by the Morse's taper surface matched.
The surface constituting runner on described spool is streamlined.
It addition, described valve body is being provided with screw thread near aperture one end.
Valve nozzle, valve body and spool assembling cyclization penetrate cast gate passive pin valve, and the small end of needle is placed in valve nozzle
The heart shoots material in mouth, forms the valve of closed mode, and needle outwards ejects with the change of fluid pressure or resets,
Thus realize being turned on and off of valve.
The present invention has the advantage that compared with prior art
1. the ring of the present invention is penetrated the spring of cast gate passive pin valve and is arranged in the spring housing of sealing, will not be subject to
The melt of High Temperature High Pressure corrodes, and is effectively increased the service life of spring, thus adds ring and penetrate and water
The service life of mouth passive pin valve.
2. the sub-runner of the present invention is arranged on a part, and the surface constituting runner uses airflow design,
Again spring is isolated runner simultaneously, greatly reduces stagnant shots, reduce the flow resistance of runner,
Make ring penetrate cast gate passive pin valve and there is good colour changing.
3. the enabling pressure of the present invention is mainly determined, at spring parameter not by the parameter of spring and the diameter of push rod
In the case of change, the diameter of push rod is the biggest, and required enabling pressure is the least.Therefore, by changing
The diameter of push rod just can change the enabling pressure of needle-valve, to adapt to the technological requirement of injection.
Further, the present invention can realize the needle-valve that gate diameter is less.
Accompanying drawing explanation
Fig. 1 is the three dimensional structure sectional view that a kind of existing ring penetrates cast gate passive pin valve；
Fig. 2 is the outline drawing of first embodiment of the invention；
Fig. 3 is the structure sectional view of first embodiment of the invention；
Fig. 4 is the D-D profile of Fig. 3；
Fig. 5 is the outline drawing of the spool of first embodiment of the invention；
Fig. 6 is the three-dimensional exploded view of first embodiment of the invention；
Fig. 7 is the outline drawing of second embodiment of the invention；
Fig. 8 is the structure sectional view of second embodiment of the invention；
Fig. 9 is the E-E profile of Fig. 8；
Figure 10 is the outline drawing of the spool of second embodiment of the invention；
Figure 11 is the three-dimensional exploded view of second embodiment of the invention.
Detailed description of the invention
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings:
Seeing Fig. 2～Figure 11, the ring of the present invention penetrates cast gate passive pin valve, including valve nozzle 1, valve body 2 and valve
Core 3.The small end of described valve nozzle 1 is provided with central feed injection mouth 11.The center of described valve body 2 is provided with from greatly
Hole 22 smoothly transits the through hole of aperture 23, and one end of valve body 2 is additionally provided with a tapped cavity body structure
21 and be connected with the macropore 22 of this through hole, the outer wall of valve body 2 other end is provided with external screw thread 24, permissible
Mounting flange, it is also possible to connect sleeve pipe thus increase the length of needle-valve.Described spool 3 by valve core 31,
Needle 32, push rod 33, spring 34 and cartridge cover 35 etc. form.
In embodiment shown in Fig. 2～Fig. 6, there is a funnel shaped rotary body one end of described valve core 31,
Which is provided with four equally distributed sub-runners of circumference 311,312,313,314, sub-runner 311,312,
313,314 at an angle and it is intersected in the circular hole 315 of infundibulate rotary body small end with the axis of valve core 31,
The other end of valve core 31 is provided with the axle journal 316 of a band Morse's taper, and the center of valve core 31 is provided with rank
Ladder through hole, is aperture 317 near one end of infundibulate rotary body.Described needle 32 is T-shaped, is arranged on
In the shoulder hole of valve core 31, its small end 321 stretches out outside valve core 31, the shank of needle 32 and valve core
The aperture 317 of 31 uses slidably minim gap to coordinate, and the shank of needle 32 is provided with annular groove
322, it is oil groove.Described cartridge cover 35 is in streamline taper, and its center is provided with ladder hole, macropore 351
There is the Morse's taper identical with on valve core axle journal 316 and be fastened on the axle journal 316 of valve core 31, valve
The large end face of core cap 35 is fitted completely with the shaft shoulder end face on the valve core 31 docked mutually gapless, and this
The outer rim of two end faces is completely superposed, the shoulder hole of cartridge cover 35 dock with the shoulder hole of valve core 31 thus
Form a cavity 37, be called spring housing.Described push rod 33 is arranged in the shoulder hole of cartridge cover 35,
The large end face of push rod 33 is taper against the large end face of needle 32, the small end of push rod 33, and stretches out cartridge cover
Outside 35, push rod 33 uses slidably minim gap to coordinate with the aperture 352 of cartridge cover 35.It addition, push away
Being additionally provided with annular groove on bar 33, one is oil groove, and one is circlip groove the close big end of push rod, an elastic spring
It is set on circlip groove.Described spring 34 is placed in spring housing 37, and is sheathed on needle 32, spring
One end of 34 is takeed on against the hole of valve core 31, and the other end is resisted against on the shaft shoulder of needle 32.Thus, spool
Body 31, needle 32, push rod 33, spring 34 and cartridge cover 35 etc. are assembled into parts, i.e. spool 3.
The big end of valve nozzle 1 is provided with the cavity 12 of corresponding valve core 31 upper hopper shape rotary body, and is communicated to central feed injection
Mouth 11.Valve nozzle 1 is sheathed on spool 3 by needle 32 one end, the small end of valve core 31 upper hopper shape rotary body
Face takes on 13 against the hole of valve nozzle 1.Valve body 2 is sheathed on the other end of spool 3, and valve core 31 upper hopper shape is revolved
The large end face turned takes on 25 against the hole of valve body 2, the outer wall that cavity body structure 21 and the valve nozzle 1 of valve body 2 is held greatly
Threaded.
In another embodiment shown in Fig. 7～Figure 11, the center of described cartridge cover 35 is provided with ladder hole,
The big end of cartridge cover sets the axle journal 353 of a band Morse's taper.Described valve core 31 one end is tapered, valve core
31 are provided with four is parallel to valve core axis and circumferential equally distributed sub-runner 311,312,313,314,
It is additionally provided with two sections of identical external screw threads of rotation direction on the outer wall of valve core 31, and the center of valve core 31 is provided with
Ladder hole, near tapering point is aperture 317, and macropore 318 has identical with on cartridge cover axle journal 353
Morse's taper is also fastened on the axle journal 353 of cartridge cover 35, the shoulder hole of cartridge cover 35 and valve core 31
Shoulder hole docks thus forms spring housing 37.Described needle 32 is arranged in the shoulder hole of valve core 31.
Described push rod 33 is T-shaped, is arranged in the shoulder hole of cartridge cover 35, and the large end face of push rod 33 is against valve
The large end face of pin 32, the small end of push rod 33 stretches out outside cartridge cover 35.Described spring 34 is arranged at spring
In room 37, and being sheathed on needle 32, one end of spring 34 is takeed on against the hole of valve core 31, the other end
It is resisted against on the shaft shoulder of needle 32.The big end of valve nozzle 1 sets a tapped cavity body structure 14, and is communicated to
Central feed injection mouth 11, valve nozzle 1 is sheathed on spool 3 and leans on needle 32 one end, by needle 32 1 on valve core 31
The sub-runner end face of side takes on 13 against the hole of valve nozzle 1, and valve nozzle 1 is connected with the outer wall thread of valve core 31.Valve
Body 2 is sheathed on the other end of spool 3, and on valve core 31, sub-runner opposite side end face is takeed on against the hole of valve body 2
25, valve body 2 is connected with the outer wall thread of valve core 31.
Seeing Fig. 2～Figure 11, valve nozzle 1, valve body 2 and spool 3 assemble cyclization and penetrate cast gate passive pin valve, valve
The small end 321 of pin 32 is placed in the central feed injection mouth 11 of valve nozzle 1, forms the valve of closed mode, needle
32 outwards eject with the change of fluid pressure or reset, thus realize being turned on and off of valve.
Claims (5)
1. ring penetrates a cast gate passive pin valve, it is characterized in that, including valve nozzle, valve body and spool, described spool
Being made up of valve core, needle, push rod, spring and cartridge cover etc., it is equal that spool is provided with at least two circumferences
The sub-runner of even distribution；Described valve core and the center of cartridge cover are respectively provided with ladder hole, cartridge cover
Shoulder hole docks with the shoulder hole of valve core thus forms a cavity；Described spring is arranged in this cavity,
One end of spring is takeed on against the hole of valve core；Described needle is arranged in the shoulder hole of valve core；Described
Push rod be arranged in the shoulder hole of cartridge cover, and its one end is stretched out outside cartridge cover；
Described valve nozzle is sheathed on spool by needle one end；Described valve body center is provided with and slips over from macropore light
Crossing the through hole of aperture, valve body is sheathed on the other end of spool, from the center of the small bore end of valve body to valve nozzle
The mouth that shoots material constitutes path.
Ring the most according to claim 1 penetrates cast gate passive pin valve, it is characterized in that, the non-spelling of described sub-runner
Connect, but be made up of a part.
Ring the most according to claim 1 penetrates cast gate passive pin valve, it is characterized in that, described valve core and valve
Core cap is docking together by the Morse's taper surface matched.
Ring the most according to claim 1 penetrates cast gate passive pin valve, it is characterized in that, described spool is constituted
The surface of runner is streamlined.
5. penetrate cast gate passive pin valve according to the ring described in any claim in Claims 1-4, it is characterized in that,
Described valve body is being provided with screw thread near aperture one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610249875.4A CN105936108A (en) | 2016-04-20 | 2016-04-20 | Passive needle valve for annularly ejecting sprue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610249875.4A CN105936108A (en) | 2016-04-20 | 2016-04-20 | Passive needle valve for annularly ejecting sprue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105936108A true CN105936108A (en) | 2016-09-14 |
Family
ID=57151479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610249875.4A Pending CN105936108A (en) | 2016-04-20 | 2016-04-20 | Passive needle valve for annularly ejecting sprue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105936108A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107962743A (en) * | 2016-12-19 | 2018-04-27 | 上海默作精密仪器有限公司 | The passive pin valve of runner is equipped with needle |
| CN108890974A (en) * | 2018-07-20 | 2018-11-27 | 芜湖新瑟安智能科技有限公司 | A kind of shut-off nozzles of injection molding machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201147979Y (en) * | 2007-12-27 | 2008-11-12 | 高建鸣 | Passive needle valve |
| CN101468511A (en) * | 2007-12-27 | 2009-07-01 | 高建鸣 | Passive pin valve |
| CN202719155U (en) * | 2012-07-31 | 2013-02-06 | 泰州长力树脂管有限公司 | Sealed regulating valve device with tapered surface |
| CN203282677U (en) * | 2013-04-26 | 2013-11-13 | 东莞市贝斯特热流道科技有限公司 | Spring-type single-point needle valve hot runner nozzle |
| CN104315159A (en) * | 2014-10-15 | 2015-01-28 | 潍坊力创电子科技有限公司 | Hydraulic high-flow high-speed digital valve with solenoid valve arranged in middle |
| US20150041569A1 (en) * | 2011-12-07 | 2015-02-12 | Continental Automotive Gmbh | Valve Assembly Arrangement for an Injection Valve and Injection Valve |
| CN105351582A (en) * | 2015-11-19 | 2016-02-24 | 中国海洋大学 | Movable valve seat type spring loaded type relief valve |
-
2016
- 2016-04-20 CN CN201610249875.4A patent/CN105936108A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201147979Y (en) * | 2007-12-27 | 2008-11-12 | 高建鸣 | Passive needle valve |
| CN101468511A (en) * | 2007-12-27 | 2009-07-01 | 高建鸣 | Passive pin valve |
| US20150041569A1 (en) * | 2011-12-07 | 2015-02-12 | Continental Automotive Gmbh | Valve Assembly Arrangement for an Injection Valve and Injection Valve |
| CN202719155U (en) * | 2012-07-31 | 2013-02-06 | 泰州长力树脂管有限公司 | Sealed regulating valve device with tapered surface |
| CN203282677U (en) * | 2013-04-26 | 2013-11-13 | 东莞市贝斯特热流道科技有限公司 | Spring-type single-point needle valve hot runner nozzle |
| CN104315159A (en) * | 2014-10-15 | 2015-01-28 | 潍坊力创电子科技有限公司 | Hydraulic high-flow high-speed digital valve with solenoid valve arranged in middle |
| CN105351582A (en) * | 2015-11-19 | 2016-02-24 | 中国海洋大学 | Movable valve seat type spring loaded type relief valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107962743A (en) * | 2016-12-19 | 2018-04-27 | 上海默作精密仪器有限公司 | The passive pin valve of runner is equipped with needle |
| CN108890974A (en) * | 2018-07-20 | 2018-11-27 | 芜湖新瑟安智能科技有限公司 | A kind of shut-off nozzles of injection molding machine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160914 |
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| WD01 | Invention patent application deemed withdrawn after publication |