EPS bubble reclaims reach technology of high grade second birth to discuss

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8g/cm3. Fragment of the bubble after dry granule shows a circle mostly graininess, undertake bead can make yield rises greatly building again right now. Nextpage but, fall to engage time with air in high temperature as a result of polystyrene material in the process of deaeration longer, oxidation of exterior share data is decomposed, cause reclaim the color of particle becomes yellow, function drops. Crowded piece, build bead to squeeze a main technology that makes bead to be: After bubble fragment joins extruder ordinal expect through feeding paragraph, compress paragraph, metric paragraph buccal model arrives after classics screen pack filters. The process is here medium, bubble fragment was experienced below the effect that extruder adds gentle screw to cut arrive to half frit condition from solid state the change of melt condition, the negative pressure that the vesicant of the remaining in material and gas generate in vacuum exhaust issues complete eduction. All sorts of impurity in material and not of screen pack of frit content classics filter processing is filtered. Brace of refrigeration of cooling water of the course after exporting a model cuts even particle to pelleter, or particle is cut by gyral razor blade in buccal model place (water annulus cuts a system) . The moisture of surface of particle of eliminate of system of dehydrate of particle classics tornado can bagging. Cramming a course that build bead is PS discards expanded plastics reclaims one of crucial step in the process. Squeeze a craft that build bead traditionally to go out to use pair of rank sheet screw to squeeze build bead, also appeared to be fed compulsively at the same time stuff is low cut sinking to solve odd screw to squeeze piece build bead, unifinication to squeeze piece build bead and double screw modified to squeeze piece build bead to wait to reclaim newly equipment and answer knock off art. Double rank sheet screw squeezes a PS that build bead because expanded plastics piles up density is low, many gas and the foaming agent of a few remain are contained in raw material, because this squeezes a treatment,brandish and exhaust must undertake in the process. Most PS expanded plastics reclaims the device that series connection of extruder of two odd screw uses in machining a process undertakes reclaiming. Among them extruder group uses the first odd screw the method of natural exhaust undertakes exhaust, its main effect is to pass heat and natural exhaust deaeration is preliminary remove moisture, remove the impurity with an older way through primary mesh filter. Refrigeration of the brace after melt stock enters exhaust of the course in extruder of the 2nd odd screw and tall order to count mesh filter to remove the impurity of small-scale diameter later cuts bead. Because equipment price is low,this makes a technology, versatility is strong, extensive use gets in home, but this builds a method to be opposite directly expanded plastics undertakes PS the as a result of raw material accumulation density when building bead is low, next makings are poor, bring about crop too low. Need undertakes to PS bubble melt and broken processing or course granule deaeration are handled, ability raises the yield that build bead. In addition, because establish ties with two extruder,this invents a method, equipment specific power consumption is big, melt particle and air contact are more, oxidation degradation and the loss that cut minute of mechanical performance that interprets pair of data to cause are bigger also. Low cut sinking to solve odd screw to squeeze piece in building a plastic melt to build a course, expanded plastics should pass deserted PS warm up, screw is cut, the action that oxidizes with oxygen is cut to fall in screw in this process, the degradation that expanded plastics puts PS in certain level is brought about thereby reclaim material is mechanical function drops. To reduce PS foam is reclaiming the degradation in the process, foreign development goes use feed makings technology compulsively to discard PS expanded plastics is carried to odd screw extruder hello makings paragraph, use efficient exhaust, Gao Changjing to compare, low the PS that cuts screw to cooperate microtherm to machine is deserted bubble is special reclaim equipment. In moisture of raw material impurity less state of affairs falls, use this equipment to be able to machine the particle of second birth PS with a taller diaphaneity. But, this equipment is higher to the moisture requirement of particle, moisture is more than 5% when, this equipment cannot divide water complete eduction, bring about go to the particle that go out is epispastic. Because need of this high-moisture bubble is advanced travel is dry with deaeration, make moisture content feeds extruder to undertake squeezing going out building bead under 5% ability. The PS that unifinication squeezes the technology that gives the tradition that build bead to machine content of low density, high-moisture must undertake when expanded plastics dry with deaeration, ability assures to reclaim the quality of particle. Unifinication squeezes an aircrew that build bead to be able to mix dry deaeration crowded go out to undertake at the same time, its are main the structure is in extruder group fed makings Duan An to install add unit of close dry deaeration, major water divides the eliminate below the agitate that gentle paddle is adding after the expanded plastics of low density and high-moisture enters deaeration plant amiable bubble, feed through feeding those who expect device enters extruder compulsively next makings paragraph. Unifinication extruder simplified to answer knock off art, can reclaim the PS that machines high-moisture content foam, than low cut sinking to solve odd screw to squeeze an aircrew that build bead to use range more extensive. But, the problem that oxidizes partly in the process that the PS in deaeration process also existing in the meantime contacts with air below high temperature condition, because because oxidation degradation contains definite facial expression,this machines the plastic grain that go out, cannot machine a completely transparent PS plastic particle. Screen pack is the material of main bad news in cramming a course that build bead. Use efficiency to increase those who cross filter mesh, the recoil that partial sinking solves the aircrew that build bead and unifinication to build an aircrew to already used new development washs mesh to filter system, should filter what the system uses fuse-element in use process is retrorse erode the impurity that pressure will come clean mesh to go up, can make the use time of mesh lengthens 2-5 times, reducing worker labor intensity while great the use efficiency that improved mesh. Double screw modified is crowded piece build bead to reclaim simply to the material that the place that build bead produces is on physical function or have a few limit at present, restricted its to use range. And will burgeoning modified technology applies PS expanded plastics reclaims can rise in the process reclaim the function of material, extend its to use range, make reclaim the use value of material gets great rise. Double screw modified is squeezed piece building bead basically is to use PS to discard expanded plastics is main raw material, all sorts of auxiliary are joined to gift in order to achieve in cramming a course that builds bead reclaim the purpose of material new property. But, the PS with the broken higher density after modified builds bead to apply to a part to be compressed through melt or heat only discards expanded plastics or the PS particle after building bead to reclaiming undertake modified is machined 2 times. Melt reclaims the loop of particle uses the particle that answers knock off art to reclaim with tradition of high grade second birth and applied course tradition to answer knock off art, pair of rank sheet screw that introduce series are crowded the particle of PS second birth that gives birth of the equipment that build bead can be divided commonly for light color translucence particle, opaque particle is mixed the mixture particle of a few impurity. Among them the particle of light color translucence with taller purity and opaque particle basically are used at making XPS squeeze frame of casing of epispastic photograph of model board, PS, PS the product with pair of raw material exteriors such as material of epispastic building adornment and performance higher demand. Contain impurity or mix have other and plastic reclaim because particle is mechanical performance is poorer, can use at making cheap mould pressing product only. As the aggravate that the market competes, what more and more enterprises do not satisfy Yu Jian sheet is low-level reclaim build bead. They are passed reclaim in foam all sorts of auxiliary are joined to gift in the process the property with new material, raise PS to reclaim thereby the additional cost of material, realize high grade second birth. The particle that low degradation craft reclaims decomposes temperature to be between 290-330 ℃ with what apply polystyrene, in undertaking processing of dry disappear bubble and melt cram the course that give below the temperature in 105 ℃ above be decomposed easily to become angry by the aerobic oxidation in air. Expanded plastics can use less to partial impurity PS to be fed compulsively stuff is low cut, low degradation odd screw squeezes an equipment that build bead to be below inferior treatment temperature (140-180 ℃ ) undertake reclaiming building bead. This equipment is adopted in machining a process feed compulsively makings, PS expanded plastics undertook compression eduction part gas namely before entering extruder screw, duan Jin of many vacuum exhaust is used to enforce all right in melt process exhaust, reduce fuse-element and the time that air engages, the screw shearing force of this equipment is weaker at the same time, great the oxidation that reduced PS is decomposed with cut degradation. The particle of PS second birth that this method treatment gives has mechanical performance loss little, the characteristic with product tall diaphaneity, can use at replacing GPPS virgin material to make the blame food sex such as CD box partly transparent package goods, the reservation of utmost reclaims the use value of material. Reclaim the modified adding pliable but strong of particle and the PS particle impact strength that after expanded plastics reclaims through melt, utility PS gains are inferior, huge restricted its scope of application. Because this is OK,to reclaiming PS particle undertakes adding modified of pliable but strong to use range in order to extend its. Main technological process is: In PS expanded plastics reclaims process medium or reclaim butadiene styrene rubber, SBS, SEBS, SIS or course graft are joined after building bead treated the material such as polyolefin passes aircrew of double screw modified to undertake mixing modified in all, reclaim in order to increase PS the impact strength of particle. The HIPS that goes up through adding the particle of modified of pliable but strong to be able to replace the market partly applies at producing the product of the opposite high end such as clavier of computer case, television crust, computer. Reclaim of particle flame retardant modified and applied PS reclaim particle has very big the production that uses at the building such as XPS warming plate to decorate material partly. If XPS board does not undertake fire prevention handles the existence when outside be being used at the wall, be being installed relatively conflagration hidden trouble. But through reclaiming to PS particle undertakes flame retardant modified, the oxygen index that increases raw material and flame retardant grade achieves fire prevention goal. Technological process is: Reclaiming second radical is joined in PS particle - double (benzene of much bromiccer adjacent 2 armour acyl inferior amine) kind the compound, bromic oxygen that turn ring assembles in content (BEO) etc fire retardant and 3 oxidation are 2 antimony, antimonial acerbity salt, borate flame retardant synergist and have, in order to raise the flame retardation of PS material. The course is flame retardant the particle of modified can apply at fire prevention to ask all sorts of taller housing materials, promoted PS to reclaim thereby the use value of material. Use reclaim all sorts of rim industry products that EPS processes. Other mix modified and applied PS to reclaim in all particle is OK still the specific requirement according to the product, join all sorts of auxiliary to undertake mixing modified in all, in order to gift the character with new material, extend its scope of application thereby. If join ketone of benzene ketone, xylene, benzene and 3 Zun kind, smooth stabilizing agent of suffocate suffocate amine reclaims with enhancing PS of particle be able to bear or endure smooth ageing ability. Join inferior phosphoric acid ester kind, the ester that contain sulfur kind antioxidant reclaims with enhancing PS of particle fight oxidation ability to wait. All sorts of auxiliary are OK also and compound at the same time make in order to gifts the product is multinomial new property. Reclaim foreground is looked into 2010, reclaim as EPS technical progress, reclaim of strength increase, one-time PS epispastic tableware from " the backward, catalog that should fall into disuse " in asking for an opinion to stalk of grain, remove, EPS reclaims use result sees first. Of the same age in June, the flower family group that major is engaged in PS deserted expanded plastics reclaims and be being used circularly is awarded " Chinese plastic second birth uses research and development to produce base circularly " , the mark is worn PS reclaims the industry is changed to hi-tech, intensive reclaim strode new step. Those who follow an earthly natural resources is dried up with each passing day with consciousness of people environmental protection increase, cannot of renewable resources reclaim circular recycle already was hasten of general trends place. CNC Milling