How to choose to note control of model aircraft outside force cut to shed nozzle

6~1MPa. Hydraulic pressure nozzle asks the pressure of hydraulic pressure source achieves 4~7MPa. What spread way according to cut is different, the cut of type of drive of avery kind of sheds nozzle to be able to be divided again for needle type and bolt type. Needle type nozzle is the needle that moves through one axial dominate nozzle opening shut will realize cut to flow, and bolt type nozzle is to use one tailor-made bolt type part, through its the motion of perpendicular fluid direction realizes cut to flow. Graph the option that hooliganism of section of 1 needle style uses control of nozzle outside force cut to shed nozzle is below the premise that accords with the craft that note model and dynamical source requirement, baric nozzle should be first selection. Because compress air more clean and the hydraulic pressure system that does not affect the engine that note model. In addition, the installation of baric nozzle is more more convenient than hydraulic pressure nozzle also. If must introduce hydraulic pressure drive, need to make sure the temperature of hydraulic pressure crock does not deliver the quality that influence job oil tastes. To allowing (or decrease as far as possible) oily fluid and the special situation that compress air to use, electric drive is a kind of program that can offer an alternative. Graph 2 increase air cylinder and needle position pilot hooliganism of needle style section uses spray head additional, generation of the meeting when shedding classics cut to shed nozzle as a result of plastic fuse-element is additional cut, do not recommend normally so use its at circumstance of horniness PVC inject. In made clear afore-mentioned two hind, when Injection Molding engineer is choosing cut to shed nozzle, still should follow the following principle: 1.

Make clear applied circumstance and craft need, in order to define nozzle kind. Needle type nozzle can prevent salivate already, can prevent filament again. Bolt type nozzle can prevent salivate, cannot prevent filament however, but special agree with mould of hot flow path, apply to goods especially very thin, shape the circumstance with very short cycle. Because loss of pressure of inject of bolt type nozzle is small, change lubricious efficiency to be close to at the same time at nozzle of common and open mode. 2.

Be based on the rate of the biggest inject of the machine, decide nozzle norms. Should make sure nozzle inject pressure falls already in normally inside acceptable range, even as far as possible give attention to two or morethings the relation of every model shot and nozzle lumen cubage, in order to ensure the stability of inject craft, be aimed at the inject of tall viscosity material especially, must undertake estimation to pressure loss, it is difficult to lest happen,shape. 3.

To make sure nozzle uses the structural intensity when and service life, the osculatory force of the pressure of the biggest inject that must consider a machine, nozzle and mould and nozzle are highest working temperature. 4.

Nozzle appropriate chooses the steel products with fine wearability, reduce the blind angle in flow path as far as possible in the design, in order to make nozzle can bear of 30% fibre glass erode for a long time. 5.

Nozzle whether regular job is as lukewarm as its the actor bad that controls a system is inseparable, especially to shaping temperature is tall, lukewarm accuse interval narrow (need accuses accurately lukewarm) circumstance. About how choosing to heat suitably group kind is mixed measure lukewarm method, the proposal seeks advice from relevant and professional manufacturer. Graph hooliganism of section of 3 bolt style uses spray head two kinds of commonly used outside force control cut sheds nozzle 1.

Hooliganism of needle style section uses spray head this cut sheds nozzle is one of the most commonly used types, its function is similar to nozzle of reed of stray bullet of needle style section, the loss of the pressure that note model that both distinction depends on pneumatic nozzle is smaller, switch is corresponding more quick. Its most typical application situation is plastic of the goods that pack shape quickly. Through synchronous movement (screw store makings while undertake model and goods top give) , this nozzle can make produce efficiency to raise 25%~30% , this high speed, efficient to the requirement industry that pack is very important. In circumstance of the other technology that note model, if nicety pours model, vital energy complementary note model and physics small epispastic (Mucell) shapes, commonly used also come here kind of nozzle. In the accurate procedure that note model, support needle closes reliably, can prevent melt on one hand plastic the discharge outside passing nozzle mouth, on the other hand but dispense with screw store the action that take is answered after makings (screw is answered take error of meeting generation displacement) .

Can control inject accurately thereby. Enraging complementary in noting model application, can prevent gas complementary protect change of the gas in controlling a process to enter makings canister, lest affect below one model the quality of second goods, protecting at the same time in controlling a process, finish store makings measure, produce cycle in order to shorten. In physics small epispastic (in the application of Mucell) , use its high speed to answer, close reliably and the character of can counteractive high back pressure, pass what reach needle place to position of cylinder body piston to pass feeling control, can improve technology further can charge a sex. Hold special part through adding, mix refine like foreign matter filter and static state implement, can expand this is planted further the function of nozzle. 2.

Hooliganism of bolt style section moves nozzle to to thermal current for the mould, the hooliganism of bolt style section that uses only channel design uses spray head very significant. Because hot flow path is in-house flow path is longer, the inject pressure loss inside flow path is big, so requirement nozzle can shed assistance to complete synchronous action through cut already, not additional increase pressure loss, want to have the taller efficiency that change color at the same time. Although this kind of nozzle may exist " filament " phenomenon, but to heating up flow path mould, in whole shape inside cycle, nozzle supports mould entry, because this is nonexistent also " filament " problem. Like needle type nozzle, the function of bolt type nozzle also can get expanding further, if raise foreign matter,filter function and static state mix refine function. Author: With system of eminent nozzle valve (Ning Bo) limited company origin: PT is contemporary and plastic CNC Milling CNC Machining