CN101664986B - Movable core type squirt cut device applied to water-assisted injection molding - Google Patents
Movable core type squirt cut device applied to water-assisted injection molding Download PDFInfo
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- CN101664986B CN101664986B CN2009101531670A CN200910153167A CN101664986B CN 101664986 B CN101664986 B CN 101664986B CN 2009101531670 A CN2009101531670 A CN 2009101531670A CN 200910153167 A CN200910153167 A CN 200910153167A CN 101664986 B CN101664986 B CN 101664986B
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- squirt cut
- movable core
- needle body
- water
- needle guard
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000001746 injection moulding Methods 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 72
- 239000007924 injection Substances 0.000 claims abstract description 72
- 230000013011 mating Effects 0.000 claims abstract description 7
- 239000003814 drug Substances 0.000 claims description 58
- 229940079593 drug Drugs 0.000 claims description 58
- 239000007788 liquid Substances 0.000 claims description 58
- 238000007789 sealing Methods 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The invention discloses a movable core type squirt cut device applied to water-assisted injection molding, comprising a squirt cut cover, a squirt cut body, a movable core, a gaseous core and a seal element, wherein the squirt cut cover is provided with an inlet opening, an air inlet and a movable core mating hole; the squirt cut body is fixed in the squirt cut cover, the movable core and the gap of a squirt cut body ring form an injection water flow path; the movable core moves to open and close the gap to control on and off of the flow path; the position of the movable core is determined by the differential pressure of water inlet pressure and pressure in an outlet mould; a through hole is arranged in the squirt cut body, the gaseous core is arranged in the hole; and the gaseous core and the through hole form a gap passage in a fit clearance manner. The invention can realize a water-assisted injection molding water inlet, air inlet and drainage function. The flow path is automatically switched on and off according to differential pressure of pressure water inlet and pressure in mould cavity to prevent high-temperature fusant in the mould cavity from entering the squirt cut. The squirt cut adjusts the maximum through-flow gap between the movable core and the squirt cut body by adjusting the relative position of the squirt cut body and the squirt cut cover according to different specifications of the mould, thus the squirt cut has adjustable through-flow capability and favourable popularity.
Description
Technical field
The present invention relates to the fluid-assisted injection shaped device, especially relate to a kind of movable core type squirt cut device that is applied to water-aid injection molding.
Background technology
The water aided injection forming technology is the new forming technique in injection mo(u)lding field; Be mainly used in the plastic products of making hollow or half hollow complicated inner cavity shape; Save core mold, directly the water under high pressure fast injection has been formed cavity in high-temperature fusant, utilized fluid pressurize cooling.With traditional gas assistant formation compared with techniques, water-aid injection molding has advantages such as quality of item is good, materials are economized, with short production cycle.But because the water shaping technology is started late, key element and technology are still immature.Liquid drugs injection is used to connect water shaping equipment and injection machine mould as the key element of water-aid injection molding technology, is the passage that water under high pressure injects and the interior water of mold cavity is discharged, the good and bad quality that directly influences product of its performance.At present, the liquid drugs injection that is applied in the water-aid injection molding mainly contains following several kinds:
First kind is the single hole liquid drugs injection.Whole liquid drugs injection only is made up of a cylindrical elements; Inside has through hole, terminal threading, and such liquid drugs injection is simple in structure, cost is low, versatility is better; But for avoiding high-temperature fusant to flow into liquid drugs injection; Circularhole diameter can not be excessive, so through-current capability is very limited, can't satisfy the big traffic demand of product.
Second kind is the porous liquid drugs injection.Liquid drugs injection still only is made up of a cylindrical elements; But inside has a plurality of minor diameter inclined holes, has solved the flow problem of lower of single hole liquid drugs injection, but the indivedual aperture easy blocking of such liquid drugs injection; Cause current incident uneven; It is cellular to make molded article be prone to formation, and for the melt of good fluidity, such liquid drugs injection still can't solve melt and get into liquid drugs injection and cause blocking problem simultaneously.
The third is the powder metallurgy liquid drugs injection.Such liquid drugs injection has adopted advanced PM technique; Liquid drugs injection has spread all over tiny hole, can effectively solve the melt blockage problem, also can significantly promote the injection flow; The external existing case of taking such liquid drugs injection to make an experiment; But this liquid drugs injection cost is higher, and technology is complicated, still is difficult to realize suitability for industrialized production at present.
In addition, can realize water inlet, drain function simultaneously, applicable to the different size mould, and liquid drugs injection simple in structure, compact, that versatility is good is at state, inside and outside still rarely seen report.
Summary of the invention
The object of the present invention is to provide a kind of movable core type squirt cut device that is applied to water-aid injection molding; Be used to realize water filling and drain function; Simultaneously as water shaping equipment and mould interface; Can prevent that melt from getting into, stopping up liquid drugs injection, and can be applicable to the different size mould, be applicable to the production operation of water-aid injection molding.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention includes liquid drugs injection mounting blocks, movable core type squirt cut, air pressure electromagnetic switch valve, the first pressure electromagnetic switch valve and the second pressure electromagnetic switch valve; Wherein:
1) axially has water inlet flow channel, air inlet runner in the liquid drugs injection mounting blocks and the end that is communicated with air inlet runner is little and movable core type squirt cut installing hole that the other end runs through greatly; Radially have the draining runner in the liquid drugs injection mounting blocks; The draining runner is communicated with water inlet flow channel and the big movable core type squirt cut installing hole of right-hand member; The air pressure electromagnetic switch valve connects air inlet runner, and the first pressure electromagnetic switch valve connects water inlet flow channel, the second pressure electromagnetic switch valve water flow passage of running in;
2) movable core type squirt cut: comprise needle guard, needle body and slide core; Have the big and little installing hole of the other end of an end in the needle guard, slide core is installed in the little installing hole of needle guard, and both are slidingly matched for staged, and needle body small in ends broad in the middle passes needle guard; One end of needle body exposes outside the needle guard macropore, and the other end of needle body passes the slide core hole, and needle body end boattail exposes outside the needle guard aperture; Needle body and junction, slide core end are for being slidingly matched, and portion other than connected portion has annular channel, and big end of needle body and needle guard macropore are threaded engagement; The needle body center has the pore of perforation; The gaseous core of gap ventilation from the side is housed in the pore, and gaseous core T shape head one end withstands the small end face of movable core type squirt cut installing hole, and the other end withstands needle body; The needle guard stage casing has annular groove, has the symmetric inlet hole on the groove;
Whole movable core type squirt cut is installed in the movable core type squirt cut installing hole of liquid drugs injection mounting blocks; Expose outer needle body of needle guard macropore and liquid drugs injection mounting blocks small end movable core type squirt cut installing hole for being threaded engagement; Mating surface seals with first O-ring seals; Needle guard seals with second O-ring seals with big end movable core type squirt cut installing hole mating surface, exposes the outer needle body of needle guard aperture and is connected with mold cavity;
When injecting pyrosol in the mold cavity; The HTHP melten gel acts on slide core right-hand member end face; Promote slide core to left movement, push up the terminal step shaft shoulder of needle body until slide core, it is inner that the sealing of slide core and needle body, needle guard formation at this moment prevents that the interior pyrosol of mold cavity from getting into liquid drugs injection;
After the melten gel injection finishes; High-Pressure Water gets into the needle guard annular groove through the first pressure electromagnetic switch valve and water inlet flow channel, gets into needle guard inside through opening the symmetric inlet hole on the annular groove, and High-Pressure Water acts on the slide core left side; Slide core moves right under pressure; This moment, slide core was opened with cooperating of needle body junction, and the tapering of slide core end aperture and needle body forms the annulus passage, and High-Pressure Water gets in the mold cavity through this annulus passage;
After the injection water pressurize finishes; Low-pressure air is got in the mold cavity by gaseous core and needle body via clearance; Current form the annulus passage through slide core and needle body and open symmetric inlet hole entering draining runner through the needle guard annular groove in the gas compressing mold cavity; Discharge through the second pressure electromagnetic switch valve,, under the discharge pressure effect, still remain on maximum through-flow position because stiction is bigger between slide core and needle guard.
Said needle guard has easy-to-mount outer-hexagonal shape near an end of mould.
The beneficial effect that the present invention has is:
(1) slide core and needle body, needle guard adopt and are slidingly matched; When mold cavity injects the HTHP melt; The slide core pressurized is to left movement, and withstands the terminal step shaft shoulder of needle body, and the sealing that forms between slide core and needle body, needle guard has effectively stoped melt entering liquid drugs injection and water shaping equipment.
(2) regulate needle body and needle guard relative position, the greatest circle czermak space that adjustable core end aperture and needle body tapering constitute, and then regulate the liquid drugs injection through-current capability, applicable to the mould of different flow demand, good versatility is arranged.
(3) slide core does not have back-moving spring in the liquid drugs injection, and the break-make of water stream channel is controlled by slide core both sides pressure reduction automatically, so this liquid drugs injection has the advantage of reliable operation, compact conformation, good manufacturability.
(4) the liquid drugs injection nozzle is that slide core and needle body gap constitute circular ring structure, compares the cavernous structure nozzle of list, porous liquid drugs injection, and the circular ring structure nozzle has improved the liquid drugs injection through-current capability, and has improved the molding effect of product.
(5) all assembly parts of liquid drugs injection all adopt anti-corrosion non-corrosive material, can guarantee that liquid drugs injection has the long life-span under the water-aid injection molding operating mode.
(6) liquid drugs injection has simple in structure, easy for installation, compact conformation, good manufacturability, is easy to standardized characteristics, is suitable for producing in serial form.
Description of drawings
Fig. 1 is a structural principle sketch map of the present invention.
Fig. 2 is the present invention's sketch map of when the mold cavity injection, working.
Fig. 3 is a water inlet work sketch map of the present invention.
Fig. 4 is a drainage works sketch map of the present invention.
Among the figure: 1. air pressure electromagnetic switch valve, 2. pressure electromagnetic switch valve, 3. air inlet runner, 4. water inlet flow channel; 5. gaseous core, 6. liquid drugs injection mounting blocks, 7.O shape sealing ring, 8. pressure electromagnetic switch valve; 9. needle guard, 10. draining runner, 11. needle bodies, 12.O shape sealing ring; 13. slide core, 14. moulds, 15. mold cavities.
The specific embodiment
As shown in Figure 1, the present invention includes liquid drugs injection mounting blocks 6, movable core type squirt cut, air pressure electromagnetic switch valve 1 and two pressure electromagnetic switch valves 2,8; Wherein:
1) axially has water inlet flow channel 4, air inlet runner 3 in the liquid drugs injection mounting blocks 6 and the end that is communicated with air inlet runner 3 is little and movable core type squirt cut installing hole that the other end runs through greatly; Radially have draining runner 10 in the liquid drugs injection mounting blocks 6; Draining runner 10 is communicated with water inlet flow channel 4 and the big movable core type squirt cut installing hole of right-hand member; Air pressure electromagnetic switch valve 1 connects air inlet runner 3, the first pressure electromagnetic switch valves 2 and connects water inlet flow channel 4, the second pressure electromagnetic switch valves 8 water flow passage 10 of running in;
2) movable core type squirt cut: comprise needle guard 9, needle body 11 and slide core 13; Have the big and little installing hole of the other end of an end in the needle guard 9, slide core 13 is installed in the needle guard 9 little installing holes, and both are slidingly matched for staged, and needle body small in ends 11 broad in the middle passes needle guard 9; One end of needle body exposes outside needle guard 9 macropores, and the other end of needle body passes the tapering of slide core 13 its needle bodies of hole and exposes outside needle guard 9 apertures, and needle body and junction, slide core 13 end are for being slidingly matched; Portion other than connected portion has annular channel; Big end of needle body and needle guard 9 macropores are threaded engagement, and needle guard 9 centers have the pore of perforation, and the gaseous core 5 of gap ventilation from the side is housed in the pore; Gaseous core 5T shape head one end withstands the small end face of movable core type squirt cut installing hole; The other end withstands needle body 11, and needle guard 9 stage casings have annular groove, have the symmetric inlet hole on the groove;
Whole movable core type squirt cut is installed in the movable core type squirt cut installing hole of liquid drugs injection mounting blocks 6; Expose outer needle body of needle guard 9 macropores and liquid drugs injection mounting blocks 6 small end movable core type squirt cut installing holes for being threaded engagement; Mating surface is with 7 sealings of first O-ring seals; Needle guard 9 seals with second O-ring seals 7 with big end movable core type squirt cut installing hole mating surface, exposes the outer needle body of needle guard 9 apertures and is connected with mold cavity.
Said needle guard 9 has easy-to-mount outer-hexagonal shape near an end of mould 14.
As shown in Figure 2; When injecting pyrosol in the mold cavity 15; Air pressure electromagnetic switch valve 1, pressure electromagnetic switch valve 2, pressure electromagnetic switch valve 8 all remain on open position at this moment, and the HTHP melten gel acts on slide core 13 right-hand member end faces, promote slide core 13 to left movement; Push up the needle body 11 terminal step shaft shoulders until slide core 13, this moment, slide core 13 can prevent that with the sealing that needle body 11, needle guard 9 form high-temperature fusant entering liquid drugs injection is inner in the mold cavity 15.
As shown in Figure 3; After the melten gel injection finished, pressure electromagnetic switch valve 2 switched to open position, pressure electromagnetic switch valve 3 gentle piezoelectricity magnetic switch valves 1 remain on open position, and High-Pressure Water gets into needle guard 9 annular grooves through pressure electromagnetic switch valve 2 and water inlet flow channel 4; Get into needle guard 9 inside through opening the symmetric inlet hole on the annular groove; High-Pressure Water acts on slide core 13 left sides, and slide core 13 moves right under pressure, and this moment, slide core 13 was opened with cooperating of needle body 11 junctions; The tapering of slide core 13 end aperture and needle body 11 forms the annulus passage, and High-Pressure Water is in this passage gets into mold cavity 15.
As shown in Figure 4; After the injection water pressurize finishes; Air pressure electromagnetic switch valve 1 switches to open position with pressure electromagnetic switch valve 3, and pressure electromagnetic switch valve 2 switches to open position, and low-pressure air is got in the mold cavity 15 by gaseous core 5 and needle body 11 via clearance; Current are opened symmetric inlet hole with needle body 11 passage that forms through needle guard 9 annular grooves through slide core 13 and are got into draining runner 10 in the gas compressing mold cavity 15; Discharge through pressure electromagnetic switch valve 8,, under the discharge pressure effect, still remain on maximum through-flow position because slide core 13 and 9 stiction of needle guard are bigger.
Slide core 13 adopts and is slidingly matched with needle body 11, needle guard 9; When mold cavity 15 injects the HTHP melt; Slide core 13 pressurizeds are to left movement; And withstanding the needle body 11 terminal step shaft shoulders, slide core 13 and needle body 11,9 of needle guards form sealing, have effectively stoped melt to get into liquid drugs injection and water shaping equipment.No back-moving spring in the liquid drugs injection, the break-make of water-in and water-out runner is controlled by slide core both sides pressure reduction automatically, so this liquid drugs injection has the advantage of reliable operation, compact conformation, good manufacturability.
The liquid drugs injection nozzle arrangements is that slide core 13 end aperture and needle body 11 taperings constitute the ring gap structure, and the circular ring structure nozzle is compared the cavernous structure nozzle of list, porous liquid drugs injection, has improved the liquid drugs injection through-current capability; And improved the molding effect of product; Through regulating needle body 11 and needle guard 9 relative positions, the greatest circle czermak space that adjustable core 13 end aperture and needle body 11 taperings constitute, and then adjusting liquid drugs injection through-current capability; Applicable to the mould of different flow demand, good versatility is arranged.
All assembly parts of this liquid drugs injection all adopt stainless steel material, can guarantee that liquid drugs injection has the long life-span under the aqueous medium operating mode of water-aid injection molding production.In addition, that this liquid drugs injection has is simple and compact for structure, good manufacturability, versatility are good, be easy to standardized characteristics, is suitable for producing in serial form.
Claims (2)
1. a movable core type squirt cut device that is applied to water-aid injection molding is characterized in that: comprise liquid drugs injection mounting blocks (6), movable core type squirt cut, air pressure electromagnetic switch valve (1), the first pressure electromagnetic switch valve (2) and the second pressure electromagnetic switch valve (8); Wherein:
1) axially has water inlet flow channel (4), air inlet runner (3) in the liquid drugs injection mounting blocks (6) and the end that is communicated with air inlet runner (3) is little and movable core type squirt cut installing hole that the other end runs through greatly; Radially have draining runner (10) in the liquid drugs injection mounting blocks (6); Draining runner (10) is communicated with water inlet flow channel (4) and the big movable core type squirt cut installing hole of right-hand member; Air pressure electromagnetic switch valve (1) connects air inlet runner (3); The first pressure electromagnetic switch valve (2) connects water inlet flow channel (4), the second pressure electromagnetic switch valve (8) water flow passage (10) of running in;
2) movable core type squirt cut: comprise needle guard (9), needle body (11) and slide core (13); Have the big and little installing hole of the other end of an end in the needle guard (9), slide core (13) is installed in the little installing hole of needle guard (9), and both are slidingly matched for staged, and needle body small in ends broad in the middle (11) passes needle guard (9); One end of needle body exposes outside needle guard (9) macropore, and the other end of needle body passes slide core (13) hole, and needle body end boattail exposes outside needle guard (9) aperture; Needle body and slide core (13) junction, end is for being slidingly matched, and portion other than connected portion has annular channel, and big end of needle body and needle guard (9) macropore are threaded engagement; Needle body (11) center has the pore of perforation; The gaseous core (5) of gap ventilation from the side is housed in the pore, and gaseous core (5) T shape head one end withstands the small end face of movable core type squirt cut installing hole, and the other end withstands needle body (11); Needle guard (9) stage casing has annular groove, has the symmetric inlet hole on the groove;
Whole movable core type squirt cut is installed in the movable core type squirt cut installing hole of liquid drugs injection mounting blocks (6); Expose outer needle body of needle guard (9) macropore and liquid drugs injection mounting blocks (6) small end movable core type squirt cut installing hole for being threaded engagement; Mating surface seals with first O-ring seals (7); Needle guard (9) seals with second O-ring seals (7) with big end movable core type squirt cut installing hole mating surface, exposes the outer needle body of needle guard (9) aperture and is connected with mold cavity;
When injecting pyrosol in the mold cavity (15); The HTHP melten gel acts on slide core (13) right-hand member end face; Promote slide core (13) to left movement; Push up the terminal step shaft shoulder of needle body (11) until slide core (13), slide core this moment (13) prevents that with the sealing that needle body (11), needle guard (9) form the interior pyrosol of mold cavity (15) from getting into liquid drugs injection inside;
After the melten gel injection finishes; High-Pressure Water gets into needle guard (9) annular groove through the first pressure electromagnetic switch valve (2) and water inlet flow channel (4); Get into needle guard (9) inside through opening the symmetric inlet hole on the annular groove; High-Pressure Water acts on slide core (13) left side, and slide core (13) moves right under pressure, and slide core this moment (13) was opened with cooperating of needle body (11) junction; The tapering of slide core (13) end aperture and needle body (11) forms the annulus passage, and High-Pressure Water gets in the mold cavity (15) through this annulus passage;
After the injection water pressurize finishes; Low-pressure air is got in the mold cavity (15) by gaseous core (5) and needle body (11) via clearance; Interior the current of gas compressing mold cavity (15) through slide core (13) and needle body (11) the annulus passage that forms open symmetric inlet hole entering draining runner (10) through needle guard (9) annular groove; Discharge through the second pressure electromagnetic switch valve (8),, under the discharge pressure effect, still remain on maximum through-flow position because stiction is bigger between slide core (13) and needle guard (9).
2. a kind of movable core type squirt cut device that is applied to water-aid injection molding according to claim 1 is characterized in that: said needle guard (9) has easy-to-mount outer-hexagonal shape near an end of mould (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101531670A CN101664986B (en) | 2009-09-24 | 2009-09-24 | Movable core type squirt cut device applied to water-assisted injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101531670A CN101664986B (en) | 2009-09-24 | 2009-09-24 | Movable core type squirt cut device applied to water-assisted injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101664986A CN101664986A (en) | 2010-03-10 |
| CN101664986B true CN101664986B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101531670A Expired - Fee Related CN101664986B (en) | 2009-09-24 | 2009-09-24 | Movable core type squirt cut device applied to water-assisted injection molding |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102848520A (en) * | 2012-09-18 | 2013-01-02 | 宁波舜宇模具有限公司 | Water needle device for water-assisted injection molding production |
| CN103307288B (en) * | 2013-07-02 | 2015-04-22 | 华东交通大学 | Simple and reliable water injection device for water-assisted injection molding |
| CN104690885B (en) * | 2015-01-31 | 2017-12-12 | 北京中拓机械集团有限责任公司 | The auxiliary use in injection molding water needle device of water |
| CN110978423A (en) * | 2019-12-30 | 2020-04-10 | 青岛海泰科模具有限公司 | Adjustable insert pin assembly and injection mold |
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Granted publication date: 20120530 Termination date: 20130924 |