CN102145530A - Hot runner system and gas spring type nozzle thereof - Google Patents
Hot runner system and gas spring type nozzle thereof Download PDFInfo
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- CN102145530A CN102145530A CN2010105453029A CN201010545302A CN102145530A CN 102145530 A CN102145530 A CN 102145530A CN 2010105453029 A CN2010105453029 A CN 2010105453029A CN 201010545302 A CN201010545302 A CN 201010545302A CN 102145530 A CN102145530 A CN 102145530A
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Abstract
The invention relates to a hot runner system and a gas spring type nozzle thereof. The hot runner system comprises a hot runner plate, a hot nozzle, a heating element and a temperature controller, wherein the hot nozzle comprises a nozzle body, a rear spreader, a needle valve, a spring, a front spreader, a nozzle mouth, a thermoelectric couple and a heater, wherein the nozzle body is in a hollow structure and internally provided with a spreader; the front part of the spreader is called as the front spreader, and the rear part of the spreader is called as the rear spreader; the spreader comprising the front spreader and the rear spreader is in a hollow structure and internally provided with the cross-shaped needle valve; one end of the needle valve extends out of the front spreader; the spring is arranged between the needle valve and the side part of the spreader; the needle valve is movably connected with the spreader through the spring; the outer surface of one side of the nozzle body is provided with the thermoelectric couple; and the outer surface of the thermoelectric couple is provided with the heater. By means of the invention, raw materials are saved, product cost is reduced, and the nozzle mouth is very reliable to close without generating wire drawing or pouring mouth protrusion, the quality of injection molding parts can be prevented from being influenced because plastics stay in a pouring runner of the nozzle.
Description
Technical field
The present invention relates to TOP-TIP, particularly relate to a kind of TOP-TIP and gas spring formula nozzle thereof that economizes in raw materials, reduces goods.
Background technology
TOP-TIP generally is made up of parts such as hot runner manifold, hot nozzle, heating element heater and temperature controllers.
Hot runner manifold: its main task is that constant temperature ground is sent into each single nozzles with melt from sprue, and in the melt transport process, the pressure of melt reduces as far as possible, does not allow material degradation.The form of hot runner manifold commonly used has: yi word pattern, H type, Y type, X font have outer heating hot runner manifold and interior heat hot runner plate two big classes on the structure.
Nozzle: hot runner mould has various ways by nozzle arrangements form difference, and type is all similar, but each producer's processing technology and implementation method have very big difference, and this has determined the quality of TOP-TIP and the difference of price.Open, needle valve and other several special shapes are generally arranged.
Needle jet is technical advanced, and advantage has:
One, do not stay into gate mark on goods, it is level and smooth to advance cast gate place vestige.
Two, can use larger-diameter cast gate, die cavity is filled accelerate, and further reduce injection pressure, reduce the product distortion.
A phenomenon and hydrostomia phenomenon appear leading in the time of three, can preventing die sinking.
Four, when screw in injection molding machine retreats, can prevent back suction material from die cavity effectively.
Five, can cooperate sequential control to reduce molding product weld marks.
Heating element heater hot flow path heating element heater: heating element heater is the important component part of TOP-TIP, and its heating accuracy and service life influence great for the control of Shooting Technique and the working stability of TOP-TIP.Heating rod, heating collar, tube heater, spiral type heated device (heating wire rod) or the like are generally arranged.
Temperature controller: temperature controller is exactly that temperature controlled instrument is carried out in each position of TOP-TIP, to high-end break-make position formula arranged respectively by the bottom, kinds such as integral differential proportion control formula and novel intelligent temperature controller, the user can be used with other mould inner assembly as required.
The hot runner mould technology has following research characteristics at present, and becomes a kind of development trend:
1.1 needle valve cast gate TOP-TIP
Needle valve cast gate TOP-TIP has can avoid the advantage that hydrostomia, cast gate opening size are big, wearing and tearing are little and gate vestiges is little, need to be specially adapted to the occasion of high injection pressure and heavy viscous material.In recent years, it constantly enlarges in the application aspect the moulding of phone housing, inner and outer decorative parts of automobile, CD, polyester bottle base, large-scale household electrical appliances.
The keying of needle-valve can be finished by hydraulic pressure, air pressure, mechanical driving mechanism or spring.
1) the hydraulic-driven valve gate can be controlled the feed supplement time exactly, can do sth. in advance to seal fast cast gate under HTHP, reduces the internal stress of plastic, increases dimensional stability.
2) the air pressure driving is safer, and safety problems such as pollution can not take place because of leakage.
3) the Japanese Fei Sha spring needle valve type nozzle figure of Co., Ltd., it utilizes the elastic force of injection pressure and spring to realize the automatic switch of jet hole, and the reliability of its action is based upon needle-valve and cooperates on the basis with the high accuracy of spreader.It is introduced that this structure not only has the advantage of high accuracy, high reliability, and loading and unloading, installation and maintenance are all very convenient.In addition, the height dimension of this nozzle is less relatively, can reduce the manufacturing cost of mould.
4) needle point hot flow path control technology is the injection moulding control technology of being developed by U.S. Kona hot flow path device manufacturing company.Its principle is to change according to cavity pressure, changes the position of valve in the TOP-TIP, reaches the purpose of control.
5) hot needle valve cast gate
The hot needle valve cast gate of Indiana, USA (Thermal Valve Gating) technology adopts two heating plate patterns, be provided with a hot flow path template heating plate and a most advanced and sophisticated heating plate that is positioned at cast gate central authorities, can switch on successively with the injection cycle process and heat or disconnection, the i.e. material at fusion cast gate place before per injection action is in pressurize and then condensation gate portions of cooling stage.Adopt the TVG system to process, can not produce radioactivity striped, condensation material piece on the parts; The cold phenomenon of condensing admittedly perhaps appears at the cast gate position.And different with other mechanical type needle valve cast gates, the TVG system can be non-maintaining, and this is owing to there is not the cause of portable part in the system.
Although use hot flow path can increase by about 15%～20% mould cost cost, with regard to long-term benefit, the influence of using the benefit of hot flow path gained to bring much larger than the cost increase, its potential application market is very vast.Based on this, the present invention in recent years both at home and abroad the current research present situation and the development trend of TOP-TIP sums up and inquires into, in the hope of providing reference and reference for the application and the popularization of hot runner mould.
1.2TGK nozzle hot flow path
The basic structure of TGK nozzle hot flow path is at wall tube and centre a torpedo type spreader to be set, between wall tube and the centre as the runner of resin.Torpedo shuttle front end is needle-like, works the function that prevents hot flow path hardening of resin and the remaining cast gate of control.As heating source, the torpedo shuttle is by heating in the termination, and body is outer heating.This technology is applied in Japan at present.
1.3 the thermal shunt road mould of band cold runner cast gate
The hot flow path back has one section cold runner, is linked to each other with goods by cold runner, connects one section cold sprue behind the hot flow path, can reduce cold and hot contradiction.
1.4 dynamic equilibrium adapted to injection system
Holy ten thousand carry Dynamic
(dynamic equilibrium) technology is the unique control system that can independently control interior fusion filling speed of each mold cavity (or many types of chamber) and pressure in the present industry.This processing technology can make that each die cavity keeps goods required dimensional stability and equilibrium in the multi-cavity mold in whole injection moulding process.By dynamic filling, make the melt pressure adjuster in the hot flow path can not only guarantee the pressure increase and decrease that each heat is best in the mouth, and can accurately control whole pressure sequence, fused mass can average rate flow in entire die like this, avoids the moulding surface to produce ugly hydrostomia, stress crazing.
1.5 laminated type hot runner mould
The laminated type hot runner mould is that two die cavities secondary or how secondary mould are stacked together, and adds TOP-TIP.Be suitable for most moulding large flat product, small-sized multi-cavity thin wall parts and the product that need produce in enormous quantities.
Compare with conventional mould, this mould clamp force only improves 5%～10%, but output has improved 90%～95%.And die manufacturing cycle can shorten 5%～10%, and application prospect is more wide.At present, domestic research about the laminated type hot runner mould starts to walk, and abroad some developed countries have been used for industrialization.
1.6 heat pipe-type hot runner mould
Hot pipe technique is from space technology.Liquid-working-medium is subjected to electric heater heating and evaporates at heating region, and heat is diffused into cold junction with the form of steam, steam condensation and emit heat, and its capacity of heat transmission can reach more than 1000 times of copper.
U.S. KONA company is applied to TOP-TIP with hot pipe technique, has developed three generations's hot nozzle system, obtains significant processing maintenance benefit.The hot nozzle point that Dynisco company incorporates heat pipe into designs more sharply, can control the temperature of gate area better.
The spring needle valve type nozzle figure of Fei Sha Co., Ltd., the automatic switch that it is, the reliability of its action is that calendar year 2001 Watlow company releases a series of low section nozzles and header heater, is called " thick film nozzle heater ".It is introduced that similar with heat pipe, it contains a kind of material low in calories, the glazed insulating barrier of one deck class, an adjustable plate resistance heater.Faster than traditional circle formula or tube heater heating, serviceability temperature is up to 500 ℃, can evenly heat flow distribution plate or, cooperate with the hot flow path of Any shape easily, improve the accurate control of TOP-TIP, the uniformity of mold temperature and the flexibility that mould designs along nozzle length direction heating.
1.7 the hot flow path that notes-blow molding machine is used
U.S.'s instrument and equipment research and development company are assemblied in independently developed patentability TOP-TIP on injection moulding-blow molding machine recently.The system of this Genesisd by name aims at single-order notes-La-blow molding machine and researches and develops.Now be positioned to be assemblied on the notes blow molding machine of UniloyMilacron and the manufacturing of Jomar company.
The Genesisd system is provided with the through type nozzle that can regulate screw front end pressure, annotates sharp-tongued end like this and need not to install gather materials anchor clamps and bail wire.It is provided with the checkout gear of an interior presetting system, when injecting the amplitude within the mould 95% at material, but the distribution situation of material on each section on the balance product, and be convenient to the faster injection die cavity of material, change painted product quickly.Each control system all designs has assembled the computer simulation analysis, can reach fabulous Temperature Distribution (temperature difference is in 5F/3 ℃).It is said, utilize this " short cast gate " technology of having patented, can't see the flow cracks of material substantially on the container that final processing obtains, it has adopted the manifold-type punch simultaneously, can realize minimizing, thermal loss can be dropped to minimum like this with the contact area of product outer surface.
1.8 the development of the standardization of element, miniaturization and seriation
The standardization of hot flow path element not only reduces the mould cost, and very is convenient to replacing and maintenance to fragile part.Polyshot company has developed quick change hot runner mould system, and being particularly suited for injection pressure is the small-sized injector of 70KN.Nozzle, valve rod and the flow distribution plate of companies such as Husky, Presto and Moldmastera all is convenient to change and pay mould fast as standard component, and only needing for 2 weeks abroad now is the referable mould.
Moldmaster company has developed the nozzle that is used for little product at the spatial constraints of small piece in calendar year 2001, contains integral heater, needle point and melt canal, and volume diameter is less than 9mm, and cast gate is apart from being 10mm only, and plastic weight is the goods of 1～30g.
2004, sage ten thousand carried and has released the hot mouth of novel screw type, can be used for producing little injection mold to 0.1 grammes per square metre injection-moulded plastic part, it is said that this also is the minimum injection-moulded plastic part weight that first three big TOP-TIP manufacturer of the whole world can realize.After successfully testing, sage ten thousand carries and this hot mouth has been carried out some improvement: heating system and cable duct tube are all integrated, only stay next columniform hole, and additionally do not reserve wire casing.The new heating component that is embedded in the aluminium makes heat distribution reach optimum state, and can change in client's factory, has significantly reduced the requirement to after-sale service and stock.
1.9 the improvement of the material of hot flow path element
Nowadays people use the such highly corrosion resistant alloy of titanium maxter alloy to make the hot flow path element more and more.The production line that a whole piece is used for metal powder injection molding is introduced by Canada Georgetown and Mold-Master company in the K98 exhibition, the production line of the element of carbonization particularly, the hot flow path made from molybdenum carbide is durable especially, and is well suited for being used for the moulding sensitive material.DME company is when making auto parts, and the polyamide requirement forming temperature of filling with 33% glass is 327 ℃, formerly needs the big heater of power output with the steel alloy nozzle, use molybdenum alloy instead after, required heating power obviously reduces.
1.10 the development of hot runner mould temperature control system
At present external hot flow path temperature control system has been realized microcomputerized control, adopts PIDD to regulate continuously, its precision can reach ± and 0.5 ℃.Domestic hot flow path component manufacturers is also to the direction effort of computer control temperature.
" the multizone temperature monitor " that German Mold2M asters Eu ropa Gm bH company shows in the K2001 exhibition (the English TMM Z that is called for short) is the hot flow path temperature control safety guard of new generation of the said firm's exploitation.It is introduced that this installs most important technological change is to adopt phase control technology to replace the fixed fire control technology that adopts in the past.TMM Z temperature controller is very high to hot road system temperature control precision, helps producing high quality of products, simultaneously hot flow path and mould are shielded, and be the highly sophisticated products of increasingly automated production control system.
2002, can realize 1～384 control warm area by the Altanium series of heat runner temperature controller of U.S. MSI company exploitation.2003, the new hot flow path device edge-gated and high-power controller that DME company releases comprised the annex in melt-flow and electric control district, and this device more is applicable to the high density material application.On the other hand, Athena Heat ﹠ Control Pty Ltd. releases novel 3 area controllers that are applicable to the low profile thermal runner, and volume is 235mm * 324mm * 180mm, and is littler, more cheap than typical 5 districts, more adapts to the injection of small plastic parts.
1.11 the development of Die CAD/CAE/CAM technology
The development of Die CAD/CAE/CAM technology and application have promoted the hot flow path technology and have developed more scientifically and rationally.Especially rely on the CAE technology that melt flows in the hot flow path is carried out analysis mode, more quickly and accurately the distribution of flow distribution plate runner, size, charging aperture position etc. are optimized affirmation.And according to analysis result processing technology is adjusted (as switching opportunity of needle-valve in the needle jet, opening sequence etc.) whereby, thereby satisfy quality and required precision that injected articles improves day by day, improve one time the die trial success rate, help enterprise to shorten the launch cycle, strengthen the market competitiveness.Most widely used simulation softward MF in the CAE software when number U.S. Moldflow company.
In the 11 international Tool and Die Technology of China and equipment exhibition, the progressive die design system NX_PDW of U.S. UGS company has tentatively realized the structure connection of mould parts, the characteristic of the CADCEUS of Japan UNISYS Co., Ltd. is the interlock of three dimensional design and two dimension view, and the plastics mould software PS_Moldmaker of Britain DELCAM company has realized the automatic encapsulation of machining information.
Domestic, the Central China University of Science and Technology has introduced artificial intelligence technology in injection moulding simulation softward HSCAE6.2.Traditional simulation softward all is the computational tool of passive type basically, needs the user to design shaping scheme and definite technological parameter in advance before the analysis, and analysis result usually is difficult to directly be used for instruct to be produced.The expert system rule storehouse of HSCAE6.2 drives expert system and carries out reasoning on the basis of analysis result being carried out comprehensive and refinement, concrete recommendation on improvement is estimated and exported to the injection moulding scheme in analysis report, it is " active " optimization system of a new generation that simulation softward is promoted by traditional " passive type " computational tool.
2 conclusions
Along with updating of domestic and international technology, the rational cost of hot runner mould makes improving constantly of operating efficiency, and the fact that economic benefit obviously increases has started the new upsurge of promote heat runner technology again.Enterprise should bring in constant renewal in and draw advanced technology both domestic and external and experience, applies in the actual production, to shorten gap, makes plastic processing already obtain rapidly and efficiently development.
The present invention is based on TOP-TIP and spring needle valve type nozzle thereof that above-mentioned foundational development goes out.This spring needle valve type nozzle mainly is exactly to utilize to realize the automatic switch of nozzle with the elastic force of injection pressure and spring as power, and need not to add in addition external driver device such as air pressure or hydraulic pressure.
Summary of the invention
Purpose of the present invention is to provide a kind of TOP-TIP and spring needle valve type nozzle thereof.This spring needle valve type nozzle mainly is exactly to utilize to realize the automatic switch of nozzle with the elastic force of injection pressure and spring as power, and need not to add in addition external driver device such as air pressure or hydraulic pressure.
Technical scheme of the present invention: a kind of TOP-TIP, comprise hot runner manifold, hot nozzle, heating element heater and temperature controller, described hot nozzle comprises nozzle body, back spreader, needle-valve, spring, preceding spreader, jet hole, thermocouple and heater;
Described nozzle body is a hollow-core construction, in be provided with spreader, the front portion of spreader is preceding spreader, the rear portion of spreader is the back spreader, the spreader of being made up of preceding spreader and back spreader is a hollow-core construction, is provided with cross needle-valve in the spreader, the outside of spreader before an end of needle-valve extends, be provided with spring between the sidepiece of needle-valve and spreader, needle-valve flexibly connects by spring and spreader;
One side external surface of described nozzle body is provided with thermocouple, and the thermocouple outer surface is provided with heater.
Among the present invention, under the situation that is not producing injection pressure, the elastic force of spring makes needle-valve keep closed condition;
After injection machine was started working, injection pressure constantly rose, and when reaching certain pressure, injection pressure makes needle-valve overcome the pressure of spring and retreats, and jet hole is opened.Under the setting pressure state, jet hole is opened maximum, and makes plastics be full of die cavity;
After mold cavity was full of by plastics and passes through the pressurize of certain hour, injection pressure descended, and needle-valve is got back to the needle-valve closed condition pushing up automatically and reliably under the elastic force effect of spring, and this moment, jet hole was closed.
Among the present invention, the stream of described hot nozzle adopts sweeping style.
The present invention also discloses a kind of gas spring formula nozzle simultaneously, comprises nozzle body, back spreader, needle-valve, spring, preceding spreader, jet hole, thermocouple and heater;
Described nozzle body is a hollow-core construction, in be provided with spreader, the front portion of spreader is preceding spreader, the rear portion of spreader is the back spreader, the spreader of being made up of preceding spreader and back spreader is a hollow-core construction, is provided with cross needle-valve in the spreader, the outside of spreader before an end of needle-valve extends, be provided with spring between the sidepiece of needle-valve and spreader, needle-valve flexibly connects by spring and spreader;
One side external surface of described nozzle body is provided with thermocouple, and the thermocouple outer surface is provided with heater.
Among the present invention, under the situation that is not producing injection pressure, the elastic force of spring makes needle-valve keep closed condition;
After injection machine was started working, injection pressure constantly rose, and when reaching certain pressure, injection pressure makes needle-valve overcome the pressure of spring and retreats, and jet hole is opened.Under the setting pressure state, jet hole is opened maximum, and makes plastics be full of die cavity;
After mold cavity was full of by plastics and passes through the pressurize of certain hour, injection pressure descended, and needle-valve is got back to the needle-valve closed condition pushing up automatically and reliably under the elastic force effect of spring, and this moment, jet hole was closed.
Among the present invention, the stream of described hot nozzle adopts sweeping style.
TOP-TIP of the present invention has following beneficial effect:
Economizing in raw materials, reduce the goods cost is the outstanding feature of hot runner mould of the present invention.Will produce a large amount of material handles in the common running gate system, when producing little goods, the weight that running gate system is coagulated material may surpass product weight.Because plastics are in molten condition in hot runner mould always, goods need not pruned cast gate, are no waste material processing basically, therefore can save a large amount of raw material.Since do not need waste material recovery, select, pulverize, operation such as dyeing, so the saving of labor, save time, save energy and reduce the cost.
Inject in the material because of no longer mixing the cast gate material of processing through repeatedly, so product quality can be significantly improved, because the running gate system plastics keep fusion, the pressure loss is little when flowing simultaneously, thereby realizes the low head injection of many cast gates, multi-imprssion mould tool and massive article easily.Hot runner is beneficial to the pressure transmission, can overcome plastic to a certain extent owing to defectives such as the not enough depression that forms of feed supplement, shrinkage cavity, distortion.
It is wide to be suitable for range of resin, and molding condition setting is convenient.Because improving and development of hot flow path temperature control system technology, hot flow path not only can be used for polyethylene, the polypropylene of melt temperature broad now, also can be used for the thermal sensitivity plastics of processing temperature narrow range, as polyvinyl chloride, polyformaldehyde (POM) etc.Commute produces the polyamide (PA) of hydrostomia, also can realize hot runner molding by selecting valve formula hot nozzle for use.
In addition, simplified control, shortening molding cycle also are important feature of hot runner mould of the present invention.Compare with common flow passage, shortened folding line journey, not only the demoulding of product and molding cycle shorten, and help realizing automated production.According to statistics, compare with common flow passage, the molding cycle of using instead behind the hot flow path generally can shorten 30%.
Further, gas spring formula nozzle of the present invention also has the following advantages:
Jet hole is closed very reliable.Needle-valve can be closed jet hole under the effect of spring force fully, can not produce to reel off raw silk from cocoons or phenomenon that gate part is outstanding.
The trapping phenomena that can not occur plastics in the nozzle running channel.Because the stream of nozzle adopts sweeping style, can prevent that plastics from resting in the nozzle running channel and influence the quality of moulding.
Description of drawings
Fig. 1 is the profile of gas spring formula nozzle of the present invention;
Fig. 2 is a stereogram of gas spring formula nozzle of the present invention;
Fig. 3 is another stereogram of gas spring formula nozzle of the present invention.
[figure number is to as directed]
1 nozzle body, 2 back spreaders
3 needle-valves, 4 springs
7 thermocouples, 8 heaters
The specific embodiment
Further understand and understanding for making architectural feature of the present invention and the effect reached had, cooperate detailed explanation, be described as follows in order to preferred embodiment and accompanying drawing:
Because there are some defectives in TOP-TIP at present, as the mould structure complexity, heater assembly is fragile, manufacturing expense is high, need that accurate temperature control equipment, moulding resin must clean no-sundries, resin is changed and colour changing difficulty, maintenance are than complexity etc., but these defectives are overcome gradually.Current, the main development trend of hot runner mould can reduce the following aspects both at home and abroad.
The miniaturization of element is with a multi-cavity mold and many cast gates of the massive article mold filling that realizes small-sized goods.By dwindling nozzle space, can on mould, dispose more many types of chamber, improve the output of goods and the utilization rate of injector.In the nineties, the I of the nozzle of Master company exploitation is to 15.875mm; Many cast gates nozzle of Husky company exploitation, each nozzle has 4 cast gates, and the cast gate distance can be closely to 9.067mm; The combination duolcx nozzle of Osco company exploitation, each nozzle has 12 cast gate probes, can be used for the moulding of 48 cavity moulds.MoldMaters company has developed the nozzle that is used for little product at the spatial constraints of small piece in calendar year 2001, contains integral heater, needle point and melt canal, and volume diameter is less than 9mm, and cast gate is apart from being 10mm only, and plastic weight is the goods of 1～30g.
The standardization of hot flow path element, seriation.Current, design of customer requirements mould and manufacturing cycle are shorter and shorter, and the standardization of hot flow path element is not only helped reducing the repetition of design work and the cost of reduction mould, and very are convenient to replacing and maintenance to fragile part.It is reported that Polyshot company has developed quick change hot runner mould system, being particularly suited for injection pressure is the small-sized injector of 70kN.Nozzle, valve rod and the flow distribution plate of companies such as Husky, Presto and Moldmasters all is convenient to change and pay mould fast as standard type, and only needing for 4 weeks abroad now is the referable mould.
Hot runner mould design global reliability improves.Nowadays both at home and abroad each big mould enterprise is very paid attention to be connected with the hot nozzle research and development of problems such as pressure distribution, Temperature Distribution, sealing of part of the design of hot runner manifold.The development and utilization of lamination hot-runner injection mould also is a focus.Stack mould can effectively increase die cavity quantity, and only need increase by 10%～15% to the requirement of injector mold clamping force.Overlapped hot runner mould some developed countries abroad has been used for industrialization.
The purpose of improving the hot flow path element material is to improve the wearability of nozzle and hot flow path and is used for the sensitive material moulding.As use toughness alloy material such as molybdenum titanium to make nozzle, making the hot flow path element with metal powder injection molding through sintering has become possibility.
Develop accurate temperature control system.In the hot runner mould molding, develop more accurate attemperating unit, the temperature of the molten resin in control hot runner manifold and the cast gate is to prevent that resin from crossing the effective measures that thermal degradation and properties of product reduce.
Hot flow path is used for common notes.Effective Combination Design by arm and hot nozzle element can make co-injection molding combine with the hot flow path technology, thus 3 layers, 5 layers of moulding even more multi-layered composite plastic product.For example Kortec company has developed the melt Conveying system and has annotated nozzle altogether; The multiple exit of Incoe company, multimode cavity are annotated the arm production line altogether and can be used for many materials multicomponent and inject altogether.
The present invention is based on the basis of Japanese Fei Sha Co., Ltd. needle jet, developed a kind of TOP-TIP and spring needle valve type nozzle thereof.
The characteristics of gas spring formula nozzle of the present invention are: the elastic force of available injection pressure and spring is realized the automatic switch of nozzle as power, and need not to add in addition external driver device such as air pressure or hydraulic pressure.
Please refer to Fig. 1-Fig. 3, Fig. 1 is the profile of gas spring formula nozzle of the present invention, and Fig. 2, Fig. 3 are the stereograms of gas spring formula nozzle of the present invention.
Described gas spring formula nozzle comprises nozzle body 1, back spreader 2, needle-valve 3, spring 4, preceding spreader 5, jet hole 6, thermocouple 7 and heater 8.
One side external surface of nozzle body 1 is provided with thermocouple 7, and thermocouple 7 outer surfaces are provided with heater 8.
Under the situation that is not producing injection pressure, the elastic force of spring 4 makes needle-valve 3 keep closed condition.
After injection machine was started working, injection pressure constantly rose, and when reaching certain pressure, injection pressure makes needle-valve 3 overcome the pressure of spring 4 and retreats, and jet hole 6 is opened.Under the setting pressure state, jet hole 6 is opened maximum, and makes plastics be full of die cavity.
After mold cavity was full of by plastics and passes through the pressurize of certain hour, injection pressure descended, and needle-valve 3 is got back to needle-valve 3 closed conditions pushing up automatically and reliably under the elastic force effect of spring 4, and this moment, jet hole 6 was closed.
Gas spring formula nozzle of the present invention is owing to have particular structure, when assembling with mould, with cavity plate (monolithic) assembly relation takes place only, thereby significantly reduced the difficulty in the installation and maintenance process, reduce the manufacturing cost of mould, also saved the air control unit of cylinder needle jet simultaneously.Particularly in the single-point moulding, the ease of use that it brought and the simplification of mould structure be cylinder needle jet or other form nozzle can't compare.
Therefore, TOP-TIP of the present invention has following technique effect:
Economizing in raw materials, reduce the goods cost is the outstanding feature of hot runner mould.Will produce a large amount of material handles in the common running gate system, when producing little goods, the weight that running gate system is coagulated material may surpass product weight.Because plastics are in molten condition in hot runner mould always, goods need not pruned cast gate, are no waste material processing basically, therefore can save a large amount of raw material.Since do not need waste material recovery, select, pulverize, operation such as dyeing, so the saving of labor, save time, save energy and reduce the cost.
Inject in the material because of no longer mixing the cast gate material of processing through repeatedly, so product quality can be significantly improved, because the running gate system plastics keep fusion, the pressure loss is little when flowing simultaneously, thereby realizes the low head injection of many cast gates, multi-imprssion mould tool and massive article easily.Hot runner is beneficial to the pressure transmission, can overcome plastic to a certain extent owing to defectives such as the not enough depression that forms of feed supplement, shrinkage cavity, distortion.
It is wide to be suitable for range of resin, and molding condition setting is convenient.Because improving and development of hot flow path temperature control system technology, hot flow path not only can be used for polyethylene, the polypropylene of melt temperature broad now, also can be used for the thermal sensitivity plastics of processing temperature narrow range, as polyvinyl chloride, polyformaldehyde (POM) etc.Commute produces the polyamide (PA) of hydrostomia, also can realize hot runner molding by selecting valve formula hot nozzle for use.
In addition, simplified control, shortening molding cycle also are important feature of hot runner mould.Compare with common flow passage, shortened folding line journey, not only the demoulding of product and molding cycle shorten, and help realizing automated production.According to statistics, compare with common flow passage, the molding cycle of using instead behind the hot flow path generally can shorten 30%.
Further, gas spring formula nozzle of the present invention also has the following advantages:
Jet hole is closed very reliable.Needle-valve can be closed jet hole under the effect of spring force fully, can not produce to reel off raw silk from cocoons or phenomenon that gate part is outstanding.
The trapping phenomena that can not occur plastics in the nozzle running channel.Because the stream of nozzle adopts sweeping style, can prevent that plastics from resting in the nozzle running channel and influence the quality of moulding.
In sum, it only is preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, all equalizations of doing according to the described shape of claim scope of the present invention, structure, feature and spirit change and modify, and all should be included in the claim scope of the present invention.
Claims (6)
1. a TOP-TIP comprises hot runner manifold, hot nozzle, heating element heater and temperature controller, it is characterized in that, described hot nozzle comprises nozzle body, back spreader, needle-valve, spring, preceding spreader, jet hole, thermocouple and heater;
Described nozzle body is a hollow-core construction, in be provided with spreader, the front portion of spreader is preceding spreader, the rear portion of spreader is the back spreader, the spreader of being made up of preceding spreader and back spreader is a hollow-core construction, is provided with cross needle-valve in the spreader, the outside of spreader before an end of needle-valve extends, be provided with spring between the sidepiece of needle-valve and spreader, needle-valve flexibly connects by spring and spreader;
One side external surface of described nozzle body is provided with thermocouple, and the thermocouple outer surface is provided with heater.
2. TOP-TIP according to claim 1 is characterized in that,
Under the situation that is not producing injection pressure, the elastic force of spring makes needle-valve keep closed condition;
After injection machine was started working, injection pressure constantly rose, and when reaching certain pressure, injection pressure makes needle-valve overcome the pressure of spring and retreats, and jet hole is opened.Under the setting pressure state, jet hole is opened maximum, and makes plastics be full of die cavity;
After mold cavity was full of by plastics and passes through the pressurize of certain hour, injection pressure descended, and needle-valve is got back to the needle-valve closed condition pushing up automatically and reliably under the elastic force effect of spring, and this moment, jet hole was closed.
3. TOP-TIP according to claim 1 and 2 is characterized in that, the stream of described hot nozzle adopts sweeping style.
4. a gas spring formula nozzle is characterized in that, comprises nozzle body, back spreader, needle-valve, spring, preceding spreader, jet hole, thermocouple and heater;
Described nozzle body is a hollow-core construction, in be provided with spreader, the front portion of spreader is preceding spreader, the rear portion of spreader is the back spreader, the spreader of being made up of preceding spreader and back spreader is a hollow-core construction, is provided with cross needle-valve in the spreader, the outside of spreader before an end of needle-valve extends, be provided with spring between the sidepiece of needle-valve and spreader, needle-valve flexibly connects by spring and spreader;
One side external surface of described nozzle body is provided with thermocouple, and the thermocouple outer surface is provided with heater.
5. gas spring formula nozzle according to claim 4 is characterized in that,
Under the situation that is not producing injection pressure, the elastic force of spring makes needle-valve keep closed condition;
After injection machine was started working, injection pressure constantly rose, and when reaching certain pressure, injection pressure makes needle-valve overcome the pressure of spring and retreats, and jet hole is opened.Under the setting pressure state, jet hole is opened maximum, and makes plastics be full of die cavity;
After mold cavity was full of by plastics and passes through the pressurize of certain hour, injection pressure descended, and needle-valve is got back to the needle-valve closed condition pushing up automatically and reliably under the elastic force effect of spring, and this moment, jet hole was closed.
6. according to claim 4 or 5 described gas spring formula nozzles, it is characterized in that the stream of described hot nozzle adopts sweeping style.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105453029A CN102145530A (en) | 2010-11-15 | 2010-11-15 | Hot runner system and gas spring type nozzle thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105453029A CN102145530A (en) | 2010-11-15 | 2010-11-15 | Hot runner system and gas spring type nozzle thereof |
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|---|---|
| CN102145530A true CN102145530A (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105453029A Pending CN102145530A (en) | 2010-11-15 | 2010-11-15 | Hot runner system and gas spring type nozzle thereof |
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| Country | Link |
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| CN (1) | CN102145530A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103600467A (en) * | 2013-10-17 | 2014-02-26 | 苏州好特斯模具有限公司 | Torpedo needle |
| CN103600079A (en) * | 2013-09-12 | 2014-02-26 | 苏州米莫金属科技有限公司 | Hot runner nozzle capable of transferring heat uniformly |
| CN103660176A (en) * | 2013-12-09 | 2014-03-26 | 昆山达索泰精密电子有限公司 | Inner sprue tip of heat flow passage die |
| CN104552807A (en) * | 2014-12-18 | 2015-04-29 | 上海塑尔热流道电气有限公司 | Needle valve hot runner system |
| CN107662316A (en) * | 2016-07-29 | 2018-02-06 | 英格拉斯股份公司 | The method and apparatus that sequential injection for plastic material molds |
| CN110271151A (en) * | 2019-06-28 | 2019-09-24 | 王飞 | A kind of direct projection pours active pin valve device |
| CN110978393A (en) * | 2019-12-17 | 2020-04-10 | 徐福全 | Injection mold for injection molding machine |
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| US4427361A (en) * | 1982-03-24 | 1984-01-24 | Toshio Saito | Shut-off nozzle for injection moulding of thermoplastics |
| CN2379288Y (en) * | 1999-06-21 | 2000-05-24 | 杨建� | Valve needle type thermal flow channel nozzle device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4427361A (en) * | 1982-03-24 | 1984-01-24 | Toshio Saito | Shut-off nozzle for injection moulding of thermoplastics |
| CN2379288Y (en) * | 1999-06-21 | 2000-05-24 | 杨建� | Valve needle type thermal flow channel nozzle device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103600079A (en) * | 2013-09-12 | 2014-02-26 | 苏州米莫金属科技有限公司 | Hot runner nozzle capable of transferring heat uniformly |
| CN103600467A (en) * | 2013-10-17 | 2014-02-26 | 苏州好特斯模具有限公司 | Torpedo needle |
| CN103660176A (en) * | 2013-12-09 | 2014-03-26 | 昆山达索泰精密电子有限公司 | Inner sprue tip of heat flow passage die |
| CN104552807A (en) * | 2014-12-18 | 2015-04-29 | 上海塑尔热流道电气有限公司 | Needle valve hot runner system |
| CN107662316A (en) * | 2016-07-29 | 2018-02-06 | 英格拉斯股份公司 | The method and apparatus that sequential injection for plastic material molds |
| CN107662316B (en) * | 2016-07-29 | 2021-10-29 | 英格拉斯股份公司 | Method and apparatus for sequential injection molding of plastic materials |
| CN110271151A (en) * | 2019-06-28 | 2019-09-24 | 王飞 | A kind of direct projection pours active pin valve device |
| CN110271151B (en) * | 2019-06-28 | 2021-08-03 | 台州永信阀门有限公司 | Direct injection casting active needle valve device |
| CN110978393A (en) * | 2019-12-17 | 2020-04-10 | 徐福全 | Injection mold for injection molding machine |
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Application publication date: 20110810 |