Hot solid sex is plastic the research that does not have technology of flow path Injection Molding

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Be in without flow path technology thermoplastic plastic treatment domain already won wide application. However, the material that hot solid sex produces when plastic Injection Molding by Wu Mo the law reclaims, waste and environmental issue are more outstanding. Use hot solid sex plastic can solve this one problem without technology of flow path Injection Molding. Forming machine manage does not have flow path Injection Molding is not to do not have flow path, however the first time when noting model, colophony is full of the flow path system of the mould, er after maintains the stock in flow path to be in Wu Liu to use position, usable at charge a pattern the next time, do not need to take out the stuff in flow path system, just take out product. For this, area of a low temperature must be set in the flow path place of the mould, temperature is in roughly 105-110 ℃ limits, the solidify temperature that low Wu Wu expects, but should maintain stock to be in for long at optimal melt flow condition not solidify, can continue to use at below one model, runner plate should use hot water or heat up oily loop heat preservation. And mould antrum is high temperature area, temperature is controlled in 145-180 ℃ . After of stock infuse antrum issues cross-linking solidify in be heated and press press condition, the both neither of unripe reticulate structure is fused also indiscerptible stock. Microtherm area and high temperature should use heat insulation of fine board of asbestine floor slab or annulus oxygen Bo normally between the area. In the meantime, still must be opposite the mould is fixed die motherboard and heat insulation of movable mould motherboard. Runner plate is in interface of Wu Gao, low temperature, the alloy steel that should use thermal conductivity to differ is made. Ask without flow path Injection Molding strict temperature is controlled. Shape attached drawing of mould mould structure does not have flow path typically to coagulate for plan of makings mould structure. Mould of NtentText Onmousedown=PopRightsMsg(); Align=center>ntentText Onmousedown=PopRightsMsg();> designs a point 1) economy analysis: Be not all hot solid sexes plastic suit to use without flow path the model that note model shapes, specific should consider from its craft sex. Use the loss that although can reduce flow path to coagulate,expects without flow path and reduce cost, but by have a structure at this kind of model relatively complex, the price can compare tall 2~3 of common injection mould normally times, shape because of what this does not fit small lot product. Use when shaping without flow path, by at should use greater inject pressure and rapidder inject rate, and of gating system and modular antrum accuse lukewarm still must undertake at the same time, accordingly, not only the machine that note model is due greater power, and the mould heats power also should compare common mould tall 20%-30% . 2) design of flow path structure: The craft noting model that stock must consider when designing gating system and mould machine a characteristic. When noting model for example, because stock has the tendency that warm up, the mould also heats, because had been accumulated than the surface,need not worry about flow path big and medicinal powder hot issue. To reduce stock as far as possible use up, can devise the sectional measure of flow path a few smallier than average gating system, can choose the runner with circle, more sectional than expressing the echelon with lesser area or sectional hemicycle. The flow that the design of whole gating system must assure stock does not appear blind angle, won't because of overheat cross-linking solidify. 3) there must be good adiabatic measure between runner plate and pattern plate, prevent runner plate temperature to lift, the stock inside flow path produces cross-linking solidify to cause flow path not expedite etc. Segregation means can choose air heat insulation and heat insulation of heat insulating materials according to the circumstance. 4) mould temperature must accurate control, allow to be in ± fluctuates inside 5 ℃ limits. Runner plate fastens control with each nozzle temperature part of one's job. Nextpage5) runner plate should choose stability the material with good, small coefficient of expansion, flow path uses a circle sectional, body of advantageous Wu Rong ensures gentle flow, general diameter is 6-8mm, bigger cost should be taken when filling of fine having Bo. 6) flow path is due with model the exterior surface roughness with same tune, cannot have makings stop. 7) nozzle diameter is general not small at 4mm, contain 0.

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.

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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