CN204487939U - A kind of use in injection molding fluid discharging apparatus - Google Patents

A kind of use in injection molding fluid discharging apparatus Download PDF

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Publication number
CN204487939U
CN204487939U CN201520066848.4U CN201520066848U CN204487939U CN 204487939 U CN204487939 U CN 204487939U CN 201520066848 U CN201520066848 U CN 201520066848U CN 204487939 U CN204487939 U CN 204487939U
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China
Prior art keywords
water
liquid drugs
drugs injection
core bar
liquid
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CN201520066848.4U
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Chinese (zh)
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唐庆华
郭金源
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Co Ltd Of Mechanical Group Is Opened Up In Beijing
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Co Ltd Of Mechanical Group Is Opened Up In Beijing
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Abstract

The utility model is a kind of use in injection molding fluid discharging apparatus, relates to device gases at high pressure and water are injected in molded thermoplastic resin body.Mainly comprise the water needle device (1) be arranged on injection forming mold, the control device (100) that water injects, the control device (200) that gases at high pressure inject, wherein, the control device (100) that water injects, the control device (200) that gases at high pressure inject is connected with water needle device (1) respectively by pipeline, the water outlet valve port (1K) of water needle device (1) is provided with gas vent and liquid outlet is also circular ring, periphery is liquid outlet, center is gas vent, and gas outlet is provided with slit air tube (1F), the liquid drugs injection core bar (1B) of air inclusion passage (1S) and the relative motion of water outlet valve port (1K) form switch.The technique effect that the utility model is useful adopts the technical solution of the utility model, can guarantee that water needle device is not melted resin blocking in process of production, and can realize ducted body and have better quality.

Description

A kind of use in injection molding fluid discharging apparatus
Technical field
The utility model relates to the shaping injection device of a kind of fluid-assisted injection, especially relates to device gases at high pressure and water are injected in molded thermoplastic resin body.
Background technology
The auxiliary injection molding technology of water is a new technique compared with the Gas assisted injection moulding that development is comparatively ripe.The advantages such as it has cool time relative to Gas assisted injection moulding technology and molding cycle is short and production efficiency is high.The forming process of water-aid injection molding technology is: injection of polymer macromolecule molten mass in die cavity; By water needle device, current injection of polymer macromolecule molten mass is inner, promote inner not solidified polymeric molten mass and be full of die cavity completely, or not solidified for inside polymeric molten mass is released die cavity; Die sinking, takes out hollow product.But, compared with foaming with gas technique, due to the difference of the physical characteristic of water and this two media of high pressure nitrogen, adopt the auxiliary process mould of gas implemented now and air tube mechanism etc. can not realize the advantages such as above-mentioned desirable production efficiency is high.Such as, because water is incompressible fluid, adopt existing slit gas injection air tube structure can not meet the discharge requirement of water shaping, need the long period just can set up required water column, then cause hollow tube wall blocked up and be subject to mold temperature and affect the even phenomenon of wall unevenness caused; When current pass through, the quick cooled and solidified of hollow wall is formed with the inwall of intensity, and follow-up pressure flow or water under high pressure pressurize, more easily occur shrinkage porosite/shrinkage cavity defect and lamination defect in hollow tube wall.For increasing the volume flow rate injecting water, set up water column fast, usual way is envelope pin type valve type constitution water needle construction, namely the circulation latus rectum of squirt mechanism is strengthened, be called that " be applied to water shaping produce liquid drugs injection ", Authorization Notice No.: CN100560332 disclose as Chinese patent literature name disclosed in 11 days June in 2008 it comprise needle guard, the core bar be placed in needle guard, spring, spacing ring and seal.Needle guard has water inlet and discharge outlet; Through hole in the middle of support limit ring is air inlet, opens slightness hole and form gas passage in core bar; In one end of liquid drugs injection access die cavity, core bar coordinates with the end of needle guard and seals the path of water to die cavity, core bar opens into water or drainage channel under spring and intake pressure or admission pressure driving, and end coordinates and the reasonable setting of core bar breeder tube size prevents the plastic melt in die cavity from entering liquid drugs injection.This technology is except complex structure, and this kind of liquid drugs injection structure is applied to and needs to there is liquid drugs injection when adopting the situation of screw rod pressurize moulded products and very easily blocked by thermoplastic resin.Cause the reason blocked to be that, when adopting screw rod pressurize, melten gel is compressed, and has very high melten gel pressure in die cavity, there is core bar under high melten gel pressure, open the risk that melten gel ingoing stream passage results in blockage; When after stopping screw rod pressurize, high pressure remaining in melten gel can be ordered about melten gel and be entered the space that core bar pumpback abdicates, and then the water flow passage entering into squirt mechanism causes liquid drugs injection to block.In addition, adopt this kind of squirt mechanism, still can not exempt the phenomenon of the product wall thickness inequality that mould temperature causes completely, produce the defect of shrinkage porosite/shrinkage cavity and layering at heavy wall place.
Utility model content
The utility model object is the deficiency existing for current water shaping hollow product, for solving problem existing in water-aid injection molding hollow tube goods, has carried out a large amount of experiment works.In process of the test, found a kind of molding structure, provide a kind of auxiliary fluid injection device, particularly a kind of squirt mechanism, achieves High-efficient Production, has both avoided the liquid drugs injection blockage problem in production process, obtains again basic uniform hollow pipe wall thickness.
For realizing the utility model object, technical scheme is as follows:
The utility model mainly comprises the water needle device 1 be arranged on injection forming mold, the control device 100 that water injects, the control device 200 that gases at high pressure inject, wherein, the control device 100 that water injects, the control device 200 that gases at high pressure inject is connected with water needle device 1 respectively by pipeline, the water outlet valve port 1K of water needle device 1 is provided with gas vent and liquid outlet is also circular ring, periphery is liquid outlet, center is gas vent, and gas outlet is provided with slit air tube 1F, the liquid drugs injection core bar 1B of air inclusion passage 1S and the relative motion of water outlet valve port 1K form switch, realize the disconnected and logical of liquid stream, described water needle device 1 comprises liquid drugs injection valve seat 1A, liquid drugs injection core bar 1B, liquid drugs injection sleeve pipe 1C, slit air tube 1F, driving cylinder 1H, sealing ring 1G, hold-down screw 1T forms, liquid drugs injection sleeve pipe 1C and driving cylinder 1H is fixed on liquid drugs injection valve seat 1A by hold-down screw 1T, liquid drugs injection core bar 1B is provided with the first sealing ring 1G and the second sealing ring 1U, and be assemblied in the installing hole 1R of liquid drugs injection valve seat, one end of liquid drugs injection core bar 1B is arranged in driving cylinder 1H, offer gas passage 1S in the other end of liquid drugs injection core bar 1B and at end, slit air tube 1F be installed, one end liquid drugs injection core bar 1B being provided with slit air tube 1F is arranged in the hollow hole 1L of liquid drugs injection sleeve pipe 1C and forms water outlet valve port 1K with the head of liquid drugs injection sleeve pipe 1C, liquid drugs injection valve seat 1A offers water inlet 1M and air inlet 1N and aquaporin 1D and gas passage 1E, the control device 100 that water inlet 1M injects respectively by connecting pipe and water with air inlet 1N is connected with the control device 200 that gases at high pressure inject, in described water needle device 1 liquid drugs injection core bar 1B and liquid drugs injection sleeve pipe 1C at water outlet valve port 1K place for being slidably matched, form switch, liquid drugs injection core bar 1B is advanced under the driving of driving cylinder 1H close water outlet valve port 1K and retrogressing to open water outlet valve port 1K, realize the disconnected and logical of current, in described water needle device 1, the aquaporin 1D of liquid drugs injection valve seat 1A is communicated with the gap between liquid drugs injection core bar 1B and the hollow hole 1L of liquid drugs injection valve pocket 1C, and forms water passage together with water outlet valve port 1K, in described water needle device 1, gas passage 1E and the gas passage 1S in liquid drugs injection core bar 1B of liquid drugs injection valve seat 1A is communicated with by the gap be limited between liquid drugs injection core bar installing hole 1R on the liquid drugs injection valve seat 1A between the first sealing ring 1G with the second sealing ring 1U and liquid drugs injection core bar 1B, and forms gas passage together with the slit in slit air tube 1F, described water is injected and is connected by the water inlet 1M of connecting pipe with described liquid drugs injection valve seat 1A with control device 100, and control is injected into leading to and breaking of the flow velocity of the water in water needle device and injection rate and current.
The technique effect that the utility model is useful adopts the technical solution of the utility model, can guarantee that water needle device is not melted resin blocking in process of production, and can realize ducted body and have better quality.
Accompanying drawing explanation
Fig. 1: the utility model structural representation;
Fig. 2: accompanying drawing 1 charging state schematic diagram;
Fig. 3: classical mould schematic diagram;
Fig. 4: use the utility model injecting glue process schematic;
Fig. 5: use the utility model gas injection process schematic diagram;
Fig. 6: use the utility model the injecting process schematic diagram;
Fig. 7: use the utility model drainage procedure schematic diagram;
Fig. 8: use the utility model hollow product final molding figure.
Detailed description of the invention
The utility model feature and correlation technique feature thereof are further described by embodiment referring to accompanying drawing:
Label in Fig. 1-8 represents respectively: 1-water needle device, 1A-liquid drugs injection valve seat, 1B-liquid drugs injection core bar, 1C-liquid drugs injection sleeve pipe, 1D – aquaporin, 1E-liquid drugs injection valve seat gas passage, 1F – slit air tube, 1G-the first sealing ring, 1H – cylinder, 1I – cylinder first enters (going out) gas port, 1J – cylinder second enters (going out) gas port, 1K – water outlet valve port, 1L – liquid drugs injection sleeve pipe hollow hole, 1M – water inlet, 1N – air inlet, liquid drugs injection core bar installing hole in 1R-liquid drugs injection valve seat, 1S-liquid drugs injection core bar gas passage, 1T – hold-down screw, 1U-the second sealing ring, 2-injection forming mold die cavity, 3-material overflow cavity, 4-interface channel, 5-hollow tube goods, 5a-hollow tube goods first termination, 5b-hollow tube goods second termination, 5c-external fixed connection structure of hollow tube goods, 6-material overflow cavity switch valve, 7-glue-feeder, 8-resinite, 9 – pressed gas groups, 10 – water, 100-water injects and control device, 200 – gases at high pressure injection control devices.
As accompanying drawing 1, 2 signals, the present embodiment mainly comprises the water needle device 1 be arranged on injection forming mold, the control device 100 that water injects, the control device 200 that gases at high pressure inject, wherein, the control device 100 that water injects, the control device 200 that gases at high pressure inject is connected with water needle device 1 respectively by pipeline, the water outlet valve port 1K of water needle device 1 is provided with gas vent and liquid outlet is also circular ring, periphery is liquid outlet, center is gas vent, and gas outlet is provided with slit air tube 1F, the liquid drugs injection core bar 1B of air inclusion passage 1S and the relative motion of water outlet valve port 1K form switch, realize the disconnected and logical of liquid stream, described water needle device 1 comprises liquid drugs injection valve seat 1A, liquid drugs injection core bar 1B, liquid drugs injection sleeve pipe 1C, slit air tube 1F, driving cylinder 1H, sealing ring 1G, hold-down screw 1T forms, liquid drugs injection sleeve pipe 1C and driving cylinder 1H is fixed on liquid drugs injection valve seat 1A by hold-down screw 1T, liquid drugs injection core bar 1B is provided with the first sealing ring 1G and the second sealing ring 1U, and be assemblied in the installing hole 1R of liquid drugs injection valve seat, one end of liquid drugs injection core bar 1B is arranged in driving cylinder 1H, offer gas passage 1S in the other end of liquid drugs injection core bar 1B and at end, slit air tube 1F be installed, one end liquid drugs injection core bar 1B being provided with slit air tube 1F is arranged in the hollow hole 1L of liquid drugs injection sleeve pipe 1C and forms water outlet valve port 1K with the head of liquid drugs injection sleeve pipe 1C, liquid drugs injection valve seat 1A offers water inlet 1M and air inlet 1N and aquaporin 1D and gas passage 1E, the control device 100 that water inlet 1M injects respectively by connecting pipe and water with air inlet 1N is connected with the control device 200 that gases at high pressure inject, in described water needle device 1 liquid drugs injection core bar 1B and liquid drugs injection sleeve pipe 1C at water outlet valve port 1K place for being slidably matched, form switch, liquid drugs injection core bar 1B is advanced under the driving of driving cylinder 1H close water outlet valve port 1K and retrogressing to open water outlet valve port 1K, realize the disconnected and logical of current, in described water needle device 1, the aquaporin 1D of liquid drugs injection valve seat 1A is communicated with the gap between liquid drugs injection core bar 1B and the hollow hole 1L of liquid drugs injection valve pocket 1C, and forms water passage together with water outlet valve port 1K, in described water needle device 1, gas passage 1E and the gas passage 1S in liquid drugs injection core bar 1B of liquid drugs injection valve seat 1A is communicated with by the gap be limited between liquid drugs injection core bar installing hole 1R on the liquid drugs injection valve seat 1A between the first sealing ring 1G with the second sealing ring 1U and liquid drugs injection core bar 1B, and forms gas passage together with the slit in slit air tube 1F, described water is injected and is connected by the water inlet 1M of connecting pipe with described liquid drugs injection valve seat 1A with control device 100, and control is injected into leading to and breaking of the flow velocity of the water in water needle device and injection rate and current.
Hollow tube goods 5 are as shown in Figure 7 the coolant hose of a kind of automobile engine of manufacturing experimently in this specific embodiment, and material is the PA66(nylon of 30% fiberglass reinforced), except hollow tube portion, also comprise two external fixed connection structures.The external diameter of hollow tube portion is 20mm, and the hollow tube internal diameter expected is 15mm ± 0.2mm.
For complete shaping body and two external connecting structures, as shown in Figure 3 and Figure 4, a set of injection mold is set, comprise mold cavity 2 and material overflow cavity 3 that mould closes rear formation, the water needle device 1 of the interface channel 4 between die cavity 2 and material overflow cavity 3, introducing fluid, one end 5a wherein forming the hollow space of goods in die cavity 2 installs water needle device 1, liquid drugs injection sleeve pipe one end containing water outlet valve port in water needle device is arranged in die cavity 2, and the other end 5b forming the hollow space of goods in die cavity 2 is connected with material overflow cavity 3 by interface channel 4; Interface channel 4 between die cavity 2 and material overflow cavity 3 arranges flash switch valve 6.In this specific embodiment, the fluid discharging apparatus adopted and water needle device wherein as depicted in figs. 1 and 2, make according to the technical solution of the utility model.Wherein, gases at high pressure injection control device 200 adopts the auxiliary pressure controller of homemade gas, both can the injection pressure of controlled pressure gas and injection length, also can control the logical and disconnected of injecting gas; Water injects and control device 100 adopts homemade water assistant controller, comprises the supercharging device of water, the injection length of PLC technology water and parameter such as injection flow velocity and injected slurry volume etc., and current is logical and disconnected; The driving cylinder 1H of the liquid drugs injection core bar in water needle device is cylinder, by first of cylinder enter (going out) gas port 1I and second enter (going out) gas port 1J switching control can realize water outlet valve port 1K active switch control, when the first gas port 1I is gas outlet, second gas port 1J is air inlet, liquid drugs injection core bar 1B moves backward, water outlet valve port 1K opens, and water passage is communicated with, can water filling; When the first gas port 1I is air inlet, the second gas port 1J is gas outlet, and liquid drugs injection core bar 1B travels forward, and water outlet valve port 1K closes, and water passage is closed, can not water filling.
Further illustrate: the internal structure of water needle device 1 and corresponding connection are as depicted in figs. 1 and 2, cylinder 1H and liquid drugs injection sleeve pipe 1C hold-down screw is driven to be arranged on liquid drugs injection valve seat 1A, liquid drugs injection valve seat 1A offers water inlet 1M and air inlet 1N, aquaporin 1D, gas passage 1E, liquid drugs injection core bar installing hole 1R, the water inlet 1M on liquid drugs injection valve seat 1A and air inlet 1N are connected respectively on the gentle auxiliary pressure controller of water assistant controller by connecting pipe, liquid drugs injection core bar 1B is inserted in the liquid drugs injection core bar installing hole 1R of liquid drugs injection valve seat 1A, the liquid drugs injection core bar coordinated with installing hole has been installed two sealing ring 1G and 1U, define the flow path of gases at high pressure, prevent gases at high pressure escape into water passage and to driving cylinder in, and one end of liquid drugs injection core bar is in driving cylinder 1H, and the center of the other end offers gas passage 1S and install at end the slit air tube 1F that only supplied gas passes through, be extended down between two sealing ring 1G and 1U under gas passage 1S, then the gap between the liquid drugs injection core bar 1B between being connected to by two sealing ring 1G and 1U by transfer hole and installing hole 1R, and and then the gas passage 1E be connected in liquid drugs injection valve seat, form gas passage, one end liquid drugs injection core bar 1B being provided with slit air tube 1F is arranged in the hollow hole 1L of liquid drugs injection sleeve pipe 1C and forms water outlet valve port 1K at the head of liquid drugs injection sleeve pipe 1C, for slide switch relation, the hollow hole 1L of liquid drugs injection sleeve pipe 1C is provided with an inner conical surface, the end of liquid drugs injection core bar 1B is also provided with a male cone (strobilus masculinus), the contact of two conical surfaces and separating distance determine switch and the openings of sizes of water outlet valve port 1K, have been come by driving cylinder described above, and the gap between the hollow hole 1L of liquid drugs injection core bar 1B and liquid drugs injection sleeve pipe 1C is the passage of water flow, be communicated with the aquaporin 1D in liquid drugs injection valve seat 1A, and form water passage together with water outlet valve port 1K recited above.After above-mentioned connection, this cover auxiliary fluid injection device is provided with the independent gentle path of water passage controlled, and is connected with the resinite of injection mo(u)lding by the liquid drugs injection bushing head be arranged in mold cavity 2.As Fig. 4 to Fig. 8 illustrates the forming step of aforesaid hollow tube and the course of work of this cover fluid discharging apparatus: first, after mould is completely closed, the water outlet valve port of flash switch valve 6 and water needle device is all in closed condition, the auxiliary pressure controller 200 of gas and water assistant controller 100 are in waiting signal state, and injection air-flow and current are off state; Then, in die cavity 2, the molten resin body 8 of q.s is injected by the gum-injecting port 7 in injection forming mold, and make resinite fully closely knit by pressurize, form the complete structure of the external fixed connection structure 5C of goods, and make the part of the complete coated liquid drugs injection sleeve pipe of resinite in die cavity 2; The auxiliary Stress control controller 200 of trigger gas, start to the gas passage injection pressure gas in water needle device 1, this pressed gas is injected in molten resin body 8 through the slit of slit air tube 1F, this pressure arranges enough high, such as 200 bar, melten gel near water outlet valve port 1K is pushed open, in resinite 8, forms a pressed gas group 9; Then trigger the auxiliary pressure controller 100 of water, start to inject water in water passage in water needle device 1, and arrive water outlet valve port 1K place; Now, by driving cylinder 1H to open water outlet valve port 1K, the auxiliary pressure controller 200 of gas stops supply pressure gas in the gas passage of water needle device, opens flash switch valve 6; Water assistant controller 100 continues in resinite, to inject water by predetermined flow velocity and volume, promotes not solidified resin material in resinite and enters into material overflow cavity, until form required ducted body in resinite; After the pressurize of water short time and cooling, water assistant controller 100 removal water injection pressure, and changeable one-tenth drain step; Water in resinite, under pressed gas group's pressure of water column head and the effect of water gravity, turns back in water assistant controller 100 by the water passage of water needle device; Then die sinking pickup, excision technique clout, the coolant hose required by acquisition, as shown in Figure 8.As above-mentioned steps, repeatedly produce coolant hose, do not occur the phenomenon that water needle device is blocked by melten gel, and inside pipe wall is smooth, uniform wall thickness is consistent.
Although the above design to the utility model object and embodiment have been done to elaborate; but those of ordinary skill in the art can recognize; under the precondition not departing from claim limited range; still can make various improvement and conversion to the utility model, and this improvement and conversion still should belong to protection domain of the present utility model.

Claims (6)

1. a use in injection molding fluid discharging apparatus, it is characterized in that, mainly comprise the water needle device (1) be arranged on injection forming mold, the control device (100) that water injects, the control device (200) that gases at high pressure inject, wherein, the control device (100) that water injects, the control device (200) that gases at high pressure inject is connected with water needle device (1) respectively by pipeline, the water outlet valve port (1K) of water needle device (1) is provided with gas vent and liquid outlet is also circular ring, periphery is liquid outlet, center is gas vent, and gas outlet is provided with slit air tube (1F), the liquid drugs injection core bar (1B) of air inclusion passage (1S) and the relative motion of water outlet valve port (1K) form switch, realize the disconnected and logical of liquid stream.
2. a kind of use in injection molding fluid discharging apparatus according to claim 1, it is characterized in that, described water needle device (1) comprises liquid drugs injection valve seat (1A), liquid drugs injection core bar (1B), liquid drugs injection sleeve pipe (1C), slit air tube (1F), driving cylinder (1H), sealing ring (1G), hold-down screw (1T) forms, liquid drugs injection sleeve pipe (1C) and driving cylinder (1H) are fixed on liquid drugs injection valve seat (1A) by hold-down screw (1T), liquid drugs injection core bar (1B) is provided with the first sealing ring (1G) and the second sealing ring (1U), and be assemblied in the installing hole (1R) of liquid drugs injection valve seat, one end of liquid drugs injection core bar (1B) is arranged in driving cylinder (1H), offer gas passage (1S) in the other end of liquid drugs injection core bar (1B) and at end, slit air tube (1F) be installed, one end liquid drugs injection core bar (1B) being provided with slit air tube (1F) is arranged in the hollow hole (1L) of liquid drugs injection sleeve pipe (1C) and forms water outlet valve port (1K) with the head of liquid drugs injection sleeve pipe (1C), liquid drugs injection valve seat (1A) is offered water inlet (1M) and air inlet (1N) and aquaporin (1D) and gas passage (1E), the control device (200) that the control device (100) that water inlet (1M) and air inlet (1N) inject with water respectively by connecting pipe injects with gases at high pressure is connected.
3. a kind of use in injection molding fluid discharging apparatus according to claim 1, it is characterized in that, in described water needle device (1) liquid drugs injection core bar (1B) and liquid drugs injection sleeve pipe (1C) at water outlet valve port (1K) place for being slidably matched, form switch, liquid drugs injection core bar (1B) is advanced under the driving of driving cylinder (1H) close water outlet valve port (1K) and water outlet valve port (1K) is opened in retrogressing, realize the disconnected of current and lead to.
4. a kind of use in injection molding fluid discharging apparatus according to claim 1, it is characterized in that, in described water needle device (1), the aquaporin (1D) of liquid drugs injection valve seat (1A) is communicated with the gap between liquid drugs injection core bar (1B) and the hollow hole (1L) of liquid drugs injection valve pocket (1C), and forms water passage together with water outlet valve port (1K).
5. a kind of use in injection molding fluid discharging apparatus according to claim 1, it is characterized in that, the gas passage (1E) of liquid drugs injection valve seat (1A) and the gas passage (1S) in liquid drugs injection core bar (1B) are communicated with by the gap be limited between liquid drugs injection core bar installing hole (1R) on the liquid drugs injection valve seat (1A) between the first sealing ring (1G) with the second sealing ring (1U) and liquid drugs injection core bar (1B) in described water needle device (1), and form gas passage together with the slit in slit air tube (1F).
6. a kind of use in injection molding fluid discharging apparatus according to claim 1, it is characterized in that, described water is injected and is connected by the water inlet (1M) of connecting pipe with described liquid drugs injection valve seat (1A) with control device (100), and control is injected into leading to and breaking of the flow velocity of the water in water needle device and injection rate and current.
CN201520066848.4U 2015-01-30 2015-01-30 A kind of use in injection molding fluid discharging apparatus Withdrawn - After Issue CN204487939U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104589581A (en) * 2015-01-30 2015-05-06 北京中拓机械集团有限责任公司 Fluid injection device for injection molding
CN107061825A (en) * 2017-04-06 2017-08-18 华东交通大学 A kind of simple reliable Water asissted Injection technique water injection device
CN110709224A (en) * 2017-03-22 2020-01-17 考特克斯·特克斯罗恩有限公司及两合公司 Method and device for producing a component from thermoplastic and component produced by said method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104589581A (en) * 2015-01-30 2015-05-06 北京中拓机械集团有限责任公司 Fluid injection device for injection molding
CN110709224A (en) * 2017-03-22 2020-01-17 考特克斯·特克斯罗恩有限公司及两合公司 Method and device for producing a component from thermoplastic and component produced by said method
CN107061825A (en) * 2017-04-06 2017-08-18 华东交通大学 A kind of simple reliable Water asissted Injection technique water injection device
CN107061825B (en) * 2017-04-06 2023-04-07 华东交通大学 Simple and reliable water injection and drainage device for water-assisted injection molding process

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Granted publication date: 20150722

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