The Ji of air officer secretary of model technology is noted in plastic treatment profession

The portion of the speed that note model is held accuse to already was noted now model aircraft manufacturer is chosen extensively. Although computer is held,accuse to note model speed section to hold accuse a system to exist already, but because of concerned material finite, the dominant position that this kind of machine sets receives expression rarely. The article uses systematic specification multistage the advantage that speed notes model, introduce its wraparoundly to be in eliminate short shoot, the utility on the finished product defect such as tired gas, shrink. 　
　
Speed ejaculation glue and the affinity that measure into quality make it turns the vital part that records model to shape into parameter. The course concludes the germinant, center of fill speed section, cease, what realize dot of a setting to set a point to another is lubricant transfer, the element that can ensure smooth and steady fuse-element appearance rate gives a hope with making is taken ask about the least internal stress.
We suggest to pick standard of section of this kind of speed below in order to:
1) the rate of fluid appearance should be constant.
2) the fuse-element in should choosing glue of fast rapid fire to prevent to shoot glue process is frozen.
3) setting of speed ejaculation glue should consider in critical area (like flow path) fill up quickly entering water mouth together decelerate speed.
4) speed ejaculation glue should ensure after modular antrum cram instantly break down reachs remaining stress with preventing to had presented fill, flash. 　　
Tie of activity of the how much appearance that the basis of set rate section is necessary to consider a pattern, other and disturbed certain factor. The set of speed is necessary to to concentrating model technology and data common sense what understand relatively know, otherwise, finished product quality will be held hard accuse. Because of fuse-element velocity of flow hard direct measure, can receive rate through measure screw travel, or model antrum pressure pushs cipher out directly (conclude stop go against a powerful person to do not have divulge) . 　
　
Data character is very important, because of polymer perhaps because stress is different and degradation, add moulding temperature to perhaps cause acuteness oxidation and chemical and tectonic degradation, but together by cut caused degradation decrescent, because high temperature dropped the viscosity of the data, cut down cut stress. Undoubted, multistage the tone burden that for instance to shaping the sensitive to heat data such as PC, POM, UPVC reachs them has rate ejaculation glue very much assistance. 　
　
The how much appearance of the mould also is payoff: Demand of thin wall place is the biggest give or take an injection speed; Demand of large wall spare parts is slow, fast, slow model speed-distance curve presents defect with preventing; To ensure spare parts quality accords with a standard, setting of the speed that note model should ensure fuse-element forward velocity of flow is constant. Fuse-element activity speed is very important, because it can affect the element in the spare parts to put direction and outside state; When fuse-element ahead arrives at area of thrust deep into the enemy forces to construct, should decelerate; To the mixed and disorderly mould with radiation dispersive shape, should ensure fuse-element classics excessive is added balancedly; Long flow path is necessary rapid fill in order to cut down the refrigeration of fuse-element forward, but give or take an injection the data of tall viscosity, if PC is exceptional state, because too rapid rate is met,course of will cold makings enters water mouth to be taken model antrum. 　
　
Adjust the speed that note model to be able to be assisted because entering water mouth,eliminate the defect that the activity that appear slights and causes. When arriving at water mouth through shooting the mouth and flow path when fuse-element, the appearance of fuse-element forward already perhaps cooled now condense, probably because of flow path Russia like that narrow and the block sluggish that forms fuse-element, until build enough pressure to drive fuse-element to cross water mouth, this can make the pressure that passes water mouth presents peak look. High pressure will damage a data and form for instance flow mark scorchs with the mouth that enter water substandard expresses defect, this kind of state can pass the method of the decelerate before just entering water mouth to overcome afore-mentioned weakness. This kind of decelerate can prevent water opening excessive cut, raise firing rate original numerical value again next. Because accurate hold accuse firing rate to be in water mouth decelerating is very difficult, be in so flow path end paragraph decelerate is a better plan. 　　
We can dominate end through holding paragraph speed ejaculation glue will prevent or cut down for instance flash, scorch, the defect such as tired gas. Fill end paragraph decelerate can prevent model antrum is excessive fill, prevent to present flash to reach reduce remaining stress. Because the mould sheds exhaust of means fag end undesirable or what fill doubt causes is tired gas, also can pass drop exhaust speed, shoot glue end especially paragraph exhaust speed tries to handle. 　
　
Short shooting is the speed that manages because of the mouth that enter water too slow or fuse-element condenses the element such as the partial activity suffocate suffocate that form happens. Shoot glue speed to be able to handle this question quickly when just passing water mouth or partial activity block. 　

The flow mark, mouth that enter water scorchs, molecular break with, delamination, fall off etc because pass water mouth,happening in the defect that heats up quick sex data to go up is when excessive cut form. 　

Make lubricantly depend on the speed that note model, data of fibre glass fill is particularly sensitive, especially nylon. Blackening (great waves grain) because viscosity changes the mobile uneasiness that form,be firm cause. Screwy vivid kinetic energy causes great waves grain or inhomogenous mist condition, happen why to be planted after all defect depends on mobile unsafe degree. 　　
When fuse-element passes water mouth high speed gives or take an injection can cause tall cut, heat quick sex is plastic will appear scorch, this kind of scorched data can be crossed model antrum, arrive at mobile forward, show the spare parts is outside now. 　　

To prevent to shoot grain, setting of speed ejaculation glue is necessary to ensure area of rapid fill flow path next slow fast course enters water mouth. Finding out this speed to change a spot is interrogative essence. If too early, fill hour will be excessive add, if too late, too big activity is inertial will cause those who shoot grain to appear. Fuse-element viscosity is lower, the trend that expects canister temperature shoots grain this kind higher to appear is being shown more. Because high pressure of high speed of demand of the small mouth that enter water gives or take an injection, also be the main factor that causes mobile defect so.
　　
Shrink can be delivered through more significant pressure, less pressure falls be able to improve. Low standard is gentle screw feed rate shortened too slow greatly mobile length, be necessary to compensate for through high firing rate. High speed activity can cut down quantity of heat to lose, and because tall cut heat happening to grind hot, meet those who form fuse-element temperature increase, decelerate a spare parts to increase thick rate outerly. Model antrum alternates be necessary to enough ply falls in order to avoid too great pressure, can present shrink otherwise. 　　
After all, the most defect that note model can get handling through adjusting the rate that note model, the doohickey that adjusts the technology that note model so is reasonable setting shoots glue speed and its section namely.




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