Hot solid sex is plastic the research that does not have technology of flow path Injection Molding
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Of 5-1 ° pour awl, at pull a runner handle. 8) cent range should be set on runner plate, match those who have type of link up with to open closedown board, need in order to have from what condensate takes out inside runner plate. 9) flow path cubage should inject than plastic total volume is minor, the time that avoids plastic fuse-element to stay inside flow path is too long, lose liquidity. Shape technology control controls on the high side of temperature of lukewarm precision flow path (> 140 ℃ ) the melt makings solidify in can causing flow path, make runner jam thereby. On the low side of flow path temperature, criterion melt makings viscosity is tall, fluidity becomes poor, obstruction of going from place to place increases accordingly, melt makings passes flow path not easily, build easily shape the short in antrum, make pressure of inject time, inject increases accordingly at the same time. For this, the on any account that controls lukewarm precision is not to have flow path inject to shape the key that craft goes on wheels. Accusing 5 ℃ of lukewarm precision ± is opposite at the some specific temperature that accuses ℃ of lukewarm limits 105-115, and this one specific temperature is the hot solid sex that is aimed at some kind of fluidity note plastic, it is 105-115 ℃ anything but between OK and general. General fluidity is noted greatly plastic, its accuse Wen Fan to be surrounded between 100-120 ℃ ; The material with little fluidity, accuse Wen Fan to be surrounded between 105-115 ℃ . Craft parameter decides surface of oily circulatory system comes loose hot loss is bigger, gasoline tank oil is so lukewarm the ℃ of temperature tall 5-10 in should comparing flow path. By at on model the heat source of antrum comes from at below model antrum conducts heat, two model there is constant difference in temperature between antrum, it is commonly between 20-30 ℃ . Next watches heat up solid sex for 500g application of plastic inject machine does not have parameter of craft of flow path Injection Molding, plastic and as common as hot solid sex Injection Molding is basic and identical. Without craft of flow path inject of plastic products shape cycle is as identical as its also, but use fast solidify without flow path inject expects, its production shapes cycle shortens than former inject craft 1/3. Some 500g heats up NtentText Onmousedown=PopRightsMsg(); Align=center> plastic inject machine does not have solid sex NtentText Onmousedown=PopRightsMsg(); Align=center>ntentText Onmousedown=PopRightsMsg();> of watch of condition of craft of flow path Injection Molding uses the makings hot firm with Injection Molding of Wu Mo flow path the gender is plastic must have shape below craft is characteristic: 1.
Better liquidity, each sections of mould model antrum can be filled below the action of constant temperature and inject pressure. Fluidity is too poor the phenomenon that notes model to use hot solid sex to plastic meeting causes the difficulty that note model and produce fill to resent, fluidity can appear greatly too " flash " reach sticky model phenomenon. 2.
Melt viscosity is more plastic than be being noted commonly low, note model to change temperature to be 70-90 ℃ commonly with the model with hot solid plastic sex. Hot solid sex is plastic inside limits of 95-120 ℃ temperature when viscosity lowest, plastic have right now relatively the performance of going from place to place of beautiful. The thermal stability with plastic sex of hot when 70-100 ℃ solid is better, the melt stock that model converts after can be deposited in makings canister longer, to noting model without flow path craft can avoid occurrence flotsam. 3.
The solidify speed below high temperature wants fast. If solidify rate is too slow, shape cycle is too long, the goods that note model goes easily form, dimension is flabby calm; Solidify rate is too rapid, can appear fill up inadequacy or model the surface is loose and make model make waste product, can use fast solidify makings to undertake high speed fills modular solidify right now. 4.
Shrinkage wants small, shrinkage is too big goods produces crackle easily or warp. Note model to use the granularity with hot solid plastic sex to want moderate at the same time, uniformity is close friends. Grain is too fine cause easily pollution and appear " bridge " phenomenon, grain is too thick cause goods appearance lacklustre, exterior quality is poorer. Shape sex of equipment hot solid is plastic mix without equipment of flow path Injection Molding thermoplastic plastic the machine that note model is roughly similar, main differentia is as follows: 1) inject device: With shape thermoplastic plastic photograph is compared, screw long way is compared slightly small, it is 14-18 about, compression ratio is about 0.
8-1.
2; Screw head closes suitably for the outline inside taper and makings canister and nozzle, and screw front is not set stop go against annulus, prevent frit makings circumfluence; Nozzle is direct form, bore diameter is 2-3mm; Shoot the mouth to must be added set heat setting, protect pressure level model is lukewarm taller, nozzle must leave a mould to arise in order to avoid so called stream delay a phenomenon. Frit expects the temperature when carrying spray head is 110-140 ℃ about, shape to satisfy craft requirement, maintain makings Wen Heng to decide, use constant temperature pilot commonly water heats system. By at to hot solid sex shapes plasticly temperature asks very strict, and canister of quickness refrigeration makings needs when producing emergency, reason installs cooling water to cover even on makings canister. 2) device combining a model: The device combining a model with hot solid plastic sex uses type full fluid or stabilized voltage formula commonly, can have exhaust action. Use the foreground development as modern society, plastic make had used each corners at the society, plastic to heating up solid sex demand also grows day and day. On auto industry, hot solid sex is plastic have a car 25% plastic, how to make full use of hot solid sex is plastic very important. Can solve runner waste problem effectively hot solid sex is plasticly without flow path Injection Molding, do not need to coagulate these at the same time makings depart from inside makings canister, managing energy, labour force, improved efficiency, avoided environmental pollution and raw material waste. As the development of science and technology, we can foreknow it will be obtained continuously progress and development. CNC Milling