CN205097443U - Thermoplasticity granular material device that foams - Google Patents
Thermoplasticity granular material device that foams Download PDFInfo
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- CN205097443U CN205097443U CN201520872216.7U CN201520872216U CN205097443U CN 205097443 U CN205097443 U CN 205097443U CN 201520872216 U CN201520872216 U CN 201520872216U CN 205097443 U CN205097443 U CN 205097443U
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Abstract
The utility model provides a thermoplasticity granular material device that foams belongs to mechanical technical field. This thermoplasticity granular material device that foams includes: the infiltration cauldron sets up to at least one, and the infiltration cauldron has the appearance chamber of stored heat plasticity granule aggregate, and the infiltration cauldron is used for going into the infiltration of overcritical CO2 thermoplasticity granule aggregate and drawing off the thermoplasticity granule aggregate after overcritical infiltration, the foamed box body, the internal soft screen cloth that is equipped with foaming mechanism and is used for carrying thermoplasticity granule aggregate of foamed box, soft screen cloth are equipped with foaming entry and foaming export, and the foaming entry is used for receiving the thermoplasticity granule aggregate that the infiltration cauldron drew off, and the thermoplasticity granule aggregate of foaming mechanism on to soft screen cloth carries out the heat -expandable that lasts, and the foaming export is used for drawing off the foamed box body with the thermoplasticity granule finished product after the foaming, inverter motor links to each other with soft screen cloth and is used for adjusting the transfer rate of soft screen cloth. This thermoplasticity granular material device that foams has the advantage that foaming effect is good, production efficiency is high.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to a kind of thermoplastic granulates foaming materials device, particularly a kind of foam device being applicable to the thermoplastic granulates materials such as TPU particle.
Background technology
TPU is as a kind of novel polymer material, TPUE rubber by name, it is a kind of thermoplastic granulates material, the plurality of advantages such as TPU has good springiness, intensity is high, wearability good, nontoxic, resistance to oxidation, processing mode are various, applicability is extensive, therefore reduce at technical development, application, cost, under the promotion of the environmental protection concept multiple factors such as deeply, TPU industry is following will keep the situation increased fast, and TPU foaming technique also becomes the problem received much concern in recent years.
In prior art, most TPU granule foaming equipment or the technological design of TPU granule foaming unreasonable, often there is the problems such as the not good and production efficiency of foaming effect is lower in it, is unfavorable for producing in enormous quantities, and often can only produce TPU particle, and limitation is strong.TPU granule foaming equipment or the TPU granule foaming technique of now enumerating several prior art are as follows:
One, in the market, the technique that great majority prepare foamed thermoplastic polyurethane particle (TPU particle) is mainly batch (-type) still foam.To this, someone devises a kind of foam based on thermoplastic polyurethane, wherein, this technique adopts autoclave to be dispersed in water by TPU particle, dispersant, surfactant and normal butane blowing agent, the regular hour is kept under being warming up to assigned temperature, then particle is unloaded rapidly and be depressed into atmospheric pressure and obtain foamed thermoplastic polyurethane bead, then through process such as washing and drying, obtain the raw material of water vapour pressing.This batch (-type) still foam technique is more complicated, and the cost realizing automation is high, and environmental pollution is serious and equipment must through special technological processing for explosion protection feature.
People two, is had to disclose with physical blowing agent, to be pressed by still or moulded from foam technique prepares the method (patent publication No. is CN103642200A, CN103951965A) of TPU expanded material, these class methods do not use crosslinking agent, and prepared expanded material has the advantage that melting reclaims processing.But the method is batch-foamed process, there is the low and properties of product batch unstable problem of working (machining) efficiency.Further, in the method, TPU resin relates to long-time boiling water treating, easily causes TPU resin generation chemical degradation and xanthochromia problem, have impact on the performance of TPU expanded material and follow-up use.
Three, also someone discloses with supercritical CO
2for blowing agent, moulded from foam technique is adopted to prepare the method (patent publication No. is CN102229709A) of TPU expanded material.The pressure of the supercritical fluid that the method is used is 5MPa-25MPa, and the temperature of supercritical fluid is 100 DEG C-250 DEG C, and the processing time of supercritical fluid is 1 minute-60 minutes.But the hypertonia required for this technology, causes the high and production safety problem of equipment cost.Further, this technology does not use decentralized medium, and TPU particle is easily out of shape under high temperature, high pressure, appearance becomes sticky, and preparation appearance is bright and clean, shape is spherical or the TPU expanded particle of elliposoidal to cause this technology to be unsuitable for.
Four, have people to have also been devised the preparation method of thermoplastic urethane elastomer composition foam, it mainly comprises gas dissolution step, cooling step and foaming rate-determining steps.During work, TPU is mixed with other resin melting, passes into supercritical CO
2, allow CO
2be dissolved in (dissolving step) in composition melt, then cooling is containing CO
2melt (cooling step), the space being finally injected into pressure ratio cooling step low is carried out foam (foaming rate-determining steps), and this technical process can by being used in conjunction extruder and injector or being realized by two rank single screw extrusion machine.Such TPU foaming method layout is more complicated, is unfavorable for realizing TPU mass production.
Five, somebody devises a kind of method (patent publication No. is CN104385479A) that continuous extrusion foaming prepares TPU expanded beads, add the barrel of the first extruder after its TPU particle mixes with the inorganic nanoparticles of organic decoration, make TPU particle be melt into polymer melt through screw rod heating; Supercritical fluid is injected at the end of the first extruder, mixed polymer/high-pressure fluid melt is injected the second extruder through Melt Pump, and reduce the temperature of the second extruder thermal treatment zone gradually, obtain polymer/supercritical fluid melt that cool, that mix; Polymer/supercritical fluid melt is extruded from the second extruding dies, obtains TPU expanded particle through ring cutting under water; Finally TPU expanded particle is obtained the TPU expanded beads of dimensionally stable through the air-dry process of fluid bed.This kind of method will be extruded continuously through twice and add multiple inorganic nanoparticles, also increases complexity and the cost of technique while enhancing TPU expanded beads intensity.In addition, inject high-pressure supercritical fluid at the first extruder end, this pressure-bearing for extruder and sealing property require very high, realization degree relative difficult.
In sum, need to design a kind of reasonable in design, foaming effect is good, production efficiency is high thermoplastic granulates foaming materials device.
Summary of the invention
The purpose of this utility model there are the problems referred to above for existing technology, proposes a kind of reasonable in design, foaming effect is good, production efficiency is high thermoplastic granulates foaming materials device.
The purpose of this utility model realizes by following technical proposal: a kind of thermoplastic granulates foaming materials device, comprising:
Infiltration still, be set at least one, described infiltration still has the cavity volume of store heat plastic particle pellet, and described infiltration still is used for supercritical CO
2infiltrate through thermoplastic granulates pellet and draw off the thermoplastic granulates pellet after overcritical infiltration;
Foaming box body, foaming mechanisms is provided with and for carrying the soft screen cloth of thermoplastic granulates pellet in described foaming box body, described soft screen cloth is provided with foaming entrance and foaming outlet, the thermoplastic granulates pellet that described foaming entrance draws off for receiving infiltration still, the foamable that described foaming mechanisms continues the thermoplastic granulates pellet on soft screen cloth, described foaming outlet is used for the thermoplastic granulates finished product after by foaming and draws off foaming box body;
Variable-frequency motor, is connected with described soft screen cloth and for regulating the transfer rate of soft screen cloth.
As further improvement of the utility model, described soft screen cloth vibrational power flow and be divided into foaming section and the circulation section that is positioned at outside foaming box body ringwise, the two ends of described foaming section are run through respectively and are passed through foaming box body, described foaming entrance is positioned at the head end of foaming section and arranges near foaming box body sidewall, and described foaming outlet is positioned at the end of foaming section and arranges near foaming box body sidewall.
Further improve as of the present utility model, described foaming mechanisms comprises the water vapour injection pipe be arranged on below foaming section, described water vapour injection pipe is provided with for the multiple jets to foaming section injection water steam, described water vapour injection pipe is arranged in foaming box body by gear & rack structure or screw drive structure or movable and fixed pulley structure movement, and described water vapour injection pipe can realize vertical displacement and its two ends are arranged near foaming box body madial wall respectively.
Further improve as of the present utility model, above-mentioned water vapour injection pipe replaces with the cellular board of band mesh.
Further improve as of the present utility model, described foaming mechanisms also comprise be arranged on foaming section above and with foaming section just to the heating rod arranged, described heating rod is set at least one and is detachably arranged on foaming box body.
Further improve as of the present utility model, described foaming box body is also provided with at least one electric fan arranged with heating rod homonymy, be outside equipped with temperature control mechanism at foaming box body, described temperature control mechanism is provided with and is arranged on foaming box body and the temp probe be positioned at above foaming section.
As further improvement of the utility model, described foaming box body is installed with precompressed tank, the thermoplastic granulates pellet that described precompressed tank is sent for receiving infiltration still, and be discharged into the foaming entrance of soft screen cloth, be provided with voltage-regulating system and temperature control system in described precompressed tank.
Further improve as of the present utility model, described foaming box body is also installed with the hopper be positioned at below precompressed tank, described hopper upper end is provided with the supplied materials mouth for receiving the thermoplastic granulates pellet that precompressed tank draws off, described hopper bottom is provided with the discharging opening that the thermoplastic granulates pellet received is discharged into soft screen cloth foaming entrance, is provided with the portable plate of discharge adjustable mouth opening aperture in hopper underside.
As further improvement of the utility model, this thermoplastic granulates foaming materials device also comprises base, described foaming box body is detachably arranged on base, described soft screen cloth is movably arranged on base, being outside equipped with the product-collecting case with weight detecting alarm at base, described base being provided with for foaming being exported the scraping mechanism that the thermoplastic granulates finished product drawn off sends into product-collecting case.
As further improvement of the utility model, described infiltration still is provided with for the relief valve to cavity volume pressure release.
As another improvement of the present utility model, described infiltration still is set to multiple and is followed successively by soft screen cloth conveying thermoplastic granulates pellet.
As another improvement of the present utility model, in infiltration still, hang the material basket be provided with for holding thermoplastic granulates pellet, described material basket is that mesh is arranged.
As another improvement of the present utility model, be outside equipped with CO at infiltration still
2gas bomb, described CO
2gas bomb by connecting pipe and the cavity volume UNICOM permeating still and for carrying supercritical CO in cavity volume
2, at CO
2gas bomb and infiltration still between be provided with booster pump and three by connecting pipe UNICOM.
Based on technique scheme, the utility model embodiment at least can produce following technique effect: overall structure is simple, reasonable in design, save and produce and cost of investment, infiltration still can be set to single or multiple, infiltration still provides thermoplastic granulates pellet continuously for follow-up foaming structure, overcome the shortcoming of existing still foam technique " intermittence ", and the foaming process of this thermoplastic granulates foaming materials device is continuous, foaming effect is good, production efficiency is high, can realize the automation mass production of foamed thermoplastic particle (as TPU particle).
Accompanying drawing explanation
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail, wherein:
Fig. 1 is the partial structurtes schematic diagram of the utility model one preferred embodiment.
Fig. 2 is the structural representation permeating still place in the utility model one preferred embodiment.
In figure, 11, thermoplastic granulates pellet; 12, thermoplastic granulates finished product; 20, still is permeated; 21, cavity volume; 22, relief valve; 30, foaming box body; 40, foaming mechanisms; 41, water vapour injection pipe; 411, jet; 42, water vapour; 43, heating rod; 44, electric fan; 45, temperature control mechanism; 451, temp probe; 50, soft screen cloth; 51, foam entrance; 52, foaming outlet; 53, foam section; 54, circulation section; 60, precompressed tank; 71, hopper; 711, supplied materials mouth; 712, discharging opening; 72, portable plate; 80, base; 90, product-collecting case; 91, weight detecting alarm; 100, scraping mechanism; 110, basket is expected; 120, CO
2gas bomb; 130, connecting pipe; 140, booster pump; 150, supporting leg; 160, backing roll; 170, regulating wheel; 180, roller; 190, fixed axis; 200, bearing; 210, tooth bar; 220, gear; 230, drain valve; 240, variable-frequency motor; 250, belt.
Detailed description of the invention
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
The utility model protects a kind of thermoplastic granulates foaming materials device, can be used for foaming TPU particle, is also applicable to other thermoplastic granulates materials outside foaming TPU particle.
Existing most of TPU granule foaming equipment or the technological design of TPU granule foaming unreasonable, often there is the problems such as the not good and production efficiency of foaming effect is lower in it, is unfavorable for producing in enormous quantities, and often can only produce TPU particle, and limitation is strong.Therefore, it is necessary for designing a kind of more rational thermoplastic granulates foaming materials device.
Below in conjunction with the elaboration that Fig. 1 to Fig. 2 carries out specifically to the technical scheme that the utility model provides.
As shown in Figure 1 to Figure 2, this thermoplastic granulates foaming materials device comprises:
Infiltration still 20, is set at least one, and infiltration still 20 has the cavity volume 21 of store heat plastic particle pellet 11, and infiltration still 20 is for by supercritical CO
2supercritical CO
2infiltrate through thermoplastic granulates pellet 11 and draw off the thermoplastic granulates pellet 11 after overcritical infiltration;
Foaming box body 30, foaming mechanisms 40 is provided with and for carrying the soft screen cloth 50 of thermoplastic granulates pellet 11 in foaming box body 30, soft screen cloth 50 is provided with foaming entrance 51 and foaming outlet 52, the thermoplastic granulates pellet 11 that foaming entrance 51 draws off for receiving infiltration still 20, the foamable that foaming mechanisms 40 continues the thermoplastic granulates pellet 11 on soft screen cloth 50, foaming outlet 52 is for drawing off foaming box body 30 by the thermoplastic granulates finished product 12 after foaming;
Variable-frequency motor, is connected with soft screen cloth 50 and for regulating the transfer rate of soft screen cloth 50.
Above-mentioned thermoplastic granulates pellet 11 is when arriving foaming outlet 52, and after namely departing from the heat effect of foaming mechanisms 40, thermoplastic granulates now reaches maximum and draws off foaming box body 30.
In the utility model, the foam pattern that above-mentioned foam device adopts is continuous foamed, and is that automation is continuous foamed, and this foam device is for the thermoplastic granulates materials such as TPU particle that foam.
This thermoplastic granulates foaming materials device belongs to polymer micro foaming technique field, it is primarily of high-pressure osmosis structure and foaming structure two part composition, wherein: the core component of high-pressure osmosis structure is above-mentioned infiltration still 20, high-pressure osmosis structure is the supercritical CO of the thermoplastic granulates materials such as preparation TPU particle
2osmosis device, its main purpose is by supercritical CO
2infiltrate through the original thermoplastic granulates pellet 11 do not foamed, foaming structure is the automation continuous steam foaming for realizing the thermoplastic granulates materials such as TPU particle.
It should be added that: TPU particle name is called TPUE rubber herein, have that hardness range is wide, wear-resisting, the characteristic such as oil resistant, transparent, good springiness, be used widely in fields such as commodity, sports goods, toy, ornament materials, halogen-free flameproof TPU can also replace flexible PVC to meet the environmental requirement in more and more field.
Supercritical CO
2be exactly CO
2supercriticality, diffusion coefficient is large, has high solvability, infiltrates through the supercritical CO of thermoplastic granulates pellet 11
2constantly to overflow in foaming process thermoplastic granulates pellet 11, ensure that the reliability of thermoplastic granulates foaming work.
This thermoplastic granulates foaming materials device in an initial condition, overall structure is simple, reasonable in design, save and produce and cost of investment, infiltration still 20 can be set to single or multiple (being preferably set to multiple), infiltration still 20 provides thermoplastic granulates pellet 11 continuously for follow-up foaming structure, overcome the shortcoming of existing still foam technique " intermittence ", and the foaming process of this thermoplastic granulates foaming materials device is continuous, foaming effect is good, production efficiency is high, ensure that the foamed thermoplastic granular mass produced, the automation mass production of realized foamed thermoplastic particle (as TPU particle).
In the present case, above-mentioned thermoplastic granulates foaming materials device is preferred for foaming TPU particle, also can be used for other thermoplastic granulates materials outside foaming TPU particle, versatility is wide, and it is continuous foamed that this thermoplastic granulates foaming materials device can realize the automation of TPU particle.
Concrete, foaming box body 30 in this case is preferably in closed box vibrational power flow, only be respectively equipped with corresponding hatch frame at foaming entrance 51 and foaming outlet 52 place, to ensure the stable of the inner foamable temperature of foaming box body 30, improve the reliability of foam device work.
More steady, reliable for making soft screen cloth 50 transmit continuously, ensure the continuity of foaming process, preferred soft screen cloth 50 vibrational power flow and be divided into foaming section 53 and the circulation section 54 that is positioned at outside foaming box body 30 ringwise, the two ends of foaming section 53 are run through by foaming box body 30 respectively, foaming entrance 51 is positioned at the head end of foaming section 53 and arranges near foaming box body 30 sidewall, and foaming outlet 52 is positioned at the end of foaming section 53 and arranges near foaming box body 30 sidewall.
The part that foaming box body 30 is stretched out at the two ends of preferred above-mentioned foaming section 53 is shorter, and only expose a bit of, remainder is circulation section 54.During work, the foamable that foaming mechanisms 40 continues the thermoplastic granulates pellet 11 in foaming section 53.
Preferably, foaming mechanisms 40 in this case comprises the water vapour injection pipe 41 be arranged on below foaming section 53, water vapour injection pipe 41 is provided with for the multiple jets 411 to foaming section 53 injection water steam 42, water vapour injection pipe 41 is arranged in foaming box body 30 by gear & rack structure or screw drive structure or movable and fixed pulley structure movement, water vapour injection pipe 41 can realize vertical displacement and its two ends are arranged near foaming box body 30 madial wall respectively, and above-mentioned water vapour injection pipe 41 can be replaced the cellular board of band mesh.Such topology layout is compact, such that the water vapour 42 of water vapour injection pipe 41 is more evenly distributed, scope is also wider, foaming effect is better.
The jet 411 of above-mentioned water vapour injection pipe 41 can be set to multiple row and opening surface is arranged towards foaming section 53, make the water vapour 42 sprayed can arrive at soft screen cloth 50 efficiently and carry out steam foaming to the thermoplastic granulates pellet 11 in foaming section 53, this thermoplastic granulates foaming materials device can realize the automation continuous steam foaming of TPU particle.
More reliable for making foaming mechanisms 40 work, preferred foaming mechanisms 40 also comprises and to be arranged on above foaming section 53 and with foaming section 53 just to the heating rod 43 arranged, heating rod 43 is set at least one and is detachably arranged on foaming box body 30.For making layout more reasonable, foamable effect is better, preferred above-mentioned heating rod 43 be set to multiple and heating rod 43 foremost to rearmost end heating rod 43 between distance suitable with the length of water vapour injection pipe 41.Preferred heating rod 43 is 5mm-30mm near one end of foaming section 53 apart from the distance of soft screen cloth 50.
Adopt the foaming mechanisms 40 that heating rod 43 and water vapour injection pipe 41 cooperatively interact, during work, the thermoplastic granulates such as TPU particle are coordinated heating continuously by heating rod 43 and water vapour injection pipe 41 in moving process, and foam gradually, the steam of heating rod 43 and water vapour injection pipe 41 cooperatively interacts, make the thermoplastic granulates foaming process such as TPU particle mild, stable, the thermoplastic granulates quality after finished product is high.
Heating rod 43 in this case can be the strip heating rod 43 across being arranged on above foaming section 53, also can be set to distribution foaming section 53 above and the multiple heating rods 43 matched with water vapour injection pipe 41, preferably this heating rod 43 vertical spacing is arranged on foaming box body 30, heating rod 43 is worked more reliable, the heat making it distribute is more even at case distribution in vivo.
Preferably, foaming box body 30 is also provided with at least one electric fan 44 arranged with heating rod 43 homonymy, be outside equipped with temperature control mechanism 45 at foaming box body 30, temperature control mechanism 45 is provided with and is arranged on foaming box body 30 and the temp probe 451 be positioned at above foaming section 53.
Preferred electric fan 44 is multiple and is equidistantly distributed on foaming box body 30, the heat on the one hand heating rod 43 being produced is set can sooner, be more uniformly dispersed in around thermoplastic granulates pellet 11 to be foamed of this place's electric fan 44 above-mentioned, also the water vapour 42 making below rise on the other hand falls after rise further and is again diffused into around thermoplastic granulates pellet 11, improves foaming effect further.
Temperature control mechanism 45 and electric fan 44, heating rod 43, water vapour injection pipe 41 cooperatively interact, constitute the chief component of foaming mechanisms 40, its temp probe 451 can be set to multiple, make temperature control mechanism 45 can measure the temperature of multiple spot in foaming box body 30, so that accurately control foaming box body 30 internal temperature.Preferably said temperature probe 451 is three further, is separately positioned on both sides and the centre position of foaming box body 30.
Preferably, foaming box body 30 is installed with precompressed tank 60, the thermoplastic granulates pellet 11 that precompressed tank 60 is sent for receiving infiltration still 20, and be discharged into the foaming entrance 51 of soft screen cloth 50, voltage-regulating system and temperature control system is provided with, to avoid the CO in the thermoplastic granulates pellet 11 after overcritical infiltration in precompressed tank 60
2the too fast effusion of gas, ensures the reliability of equipment work.
Further, foaming box body 30 is also installed with the hopper 71 be positioned at below precompressed tank 60, hopper 71 upper end is provided with the supplied materials mouth 711 for receiving the thermoplastic granulates pellet 11 that precompressed tank 60 draws off, hopper 71 bottom is provided with the thermoplastic granulates pellet 11 received and is discharged into soft screen cloth 50 and foams the discharging opening 712 of entrance 51, is provided with the portable plate 72 of discharge adjustable mouth 712 opening aperture in hopper 71 underside.
Hopper 71 reasonable in design, cooperatively interact with precompressed tank 60, soft screen cloth 50, the outlet of preferred precompressed tank 60 is alignd with the supplied materials mouth 711 of hopper 71, can control the inlet amount of thermoplastic granulates pellet 11 and this pellet can be evenly distributed on soft screen cloth 50.
Preferred or the optional embodiment as one, this thermoplastic granulates foaming materials device also comprises base 80, foaming box body 30 is detachably arranged on base 80, soft screen cloth 50 is movably arranged on base 80, be outside equipped with the product-collecting case 90 with weight detecting alarm 91 at base 80, the thermoplastic granulates finished product 12 base 80 is provided with for foaming outlet 52 being drawn off sends into the scraping mechanism 100 of product-collecting case 90.Such topology layout, makes integral foam device production efficiency higher, is beneficial to production in enormous quantities thermoplastic granulates.For making practicality stronger, it is adjustable that the warning weight of preferred weight detection alarm device 91 arranges scope.
Need first to carry out pressure release before the feeding of infiltration still 20, preferably, infiltration still 20 is provided with for the relief valve 22 to cavity volume 21 pressure release.
In the utility model, the foam process of above-mentioned thermoplastic granulates foaming materials device is as follows:
Step one, thermoplastic granulates pellet 11 put into the cavity volume 21 of infiltration still 20, then pass into supercritical CO in cavity volume 21
2and make it infiltrate through thermoplastic granulates pellet 11 in cavity volume 21;
Step 2, control relief valve 22, to the pressure release of infiltration still 20, after still 20 to be infiltrated pressure release, drive infiltration still 20 to send in precompressed tank 60 by the thermoplastic granulates pellet 11 after overcritical infiltration;
Hopper 71 sent into by step 3, the thermoplastic granulates pellet 11 driving precompressed tank 60 to be received, then controls the thermoplastic granulates pellet 11 that hopper 71 makes it receive and be evenly distributed on soft screen cloth 50;
Step 4, drive the related thermoplastic granulates pellet 11 of soft screen cloth 50 by foaming entrance 51 to foaming outlet 52 direction displacement, thermoplastic granulates pellet 11 is made to start foaming under the cooperation heat effect of water vapour 42 and heating rod 43, now electric fan 44, heating rod 43, water vapour injection pipe 41, temperature control mechanism 45 are all in opening, can carry out open and close controlling during work according to service condition to heating rod 43;
Step 5, when soft screen cloth 50 carry the thermoplastic granulates finished product 12 after foaming arrive foaming outlet 52 time, now thermoplastic granule size reaches maximum, simultaneously drive scraping mechanism 100 thermoplastic granulates finished product 12 is sent into product-collecting case 90;
Step 6, when thermoplastic granulates finished product 12 weight in product-collecting case 90 reaches preset weight value, weight detecting alarm 91 is reported to the police.
In the present case, above-mentioned foam process is preferred for foaming TPU granular materials, also can according to actual needs, by this foam process for the production of other thermoplastic granulates materials outside TPU particle.
The foam process of this thermoplastic granulates foaming materials device is rationally distributed, closely cooperates between each mechanism, changes the shortcoming that traditional still foam technique is discontinuous, can not realize automation, can realize the mass production of the thermoplastic granulates such as foaming TPU particle.
Preferred or the optional embodiment as one, in above-mentioned foam process, for ensureing foaming effect, enhances productivity, preferably critical CO in infiltration still 20
2temperature be set to 30 DEG C-45 DEG C, infiltration still 20 chamber pressure is set to 7MPa-13MPa, time of penetration in infiltration still 20 is set to 0.5h-5h, the foamed time of thermoplastic granulates pellet 11 is set to 20s-120s, pressure in precompressed tank 60 is set to 0.1MPa-0.9MPa, in precompressed tank 60, temperature is set to 0 DEG C-25 DEG C, and the temperature in foaming box body 30 is set to 50 DEG C-150 DEG C, and in foaming box body 30, pressure is set to 0.1MPa-0.7MPa.
Preferably, critical CO in above-mentioned infiltration still 20 is set
2temperature be 33 DEG C, infiltration still 20 chamber pressure is 11MPa, and the time of penetration in infiltration still 20 is 3h, and now this device work is in relatively mild state, ensures the stability of work.
For ensureing continuous seepage, preferably infiltration still 20 is set to multiple and is followed successively by soft screen cloth 50 and carries thermoplastic granulates pellet 11.
Preferably, in infiltration still 20, hang the material basket 110 be provided with for holding thermoplastic granulates pellet 11, material basket 110 is arranged in mesh, can make supercritical CO
2abundant infiltration pellet interior.
Improve as another, be outside equipped with CO at infiltration still 20
2gas bomb 120, CO
2gas bomb 120 by connecting pipe 130 and cavity volume 21 UNICOM permeating still 20 and for carrying supercritical CO in cavity volume 21
2, at CO
2gas bomb 120 and infiltration still 20 between be provided with booster pump 140 and three by connecting pipe 130 UNICOM.
In addition, in the utility model, for make integral foam device and foam process more perfect, foaming effect better and ensure production efficiency, to above-mentioned foam device structure further improve as follows:
First, in high-pressure osmosis structure, CO
2gas bomb 120 is provided with Pressure gauge, is convenient to monitoring and supplements supercritical CO in time
2, infiltration still 20 is provided with Pressure gauge and thermometer (thermometer), is convenient to monitoring and regulates in time.
Secondly, in foaming structure, precompressed tank 60 is fixed by welding in the upper left side of foaming box body 30; Hopper 71 is fixed on the left side of foaming box body 30 by welding manner and is positioned at below precompressed tank 60, above soft screen cloth 50; Foaming box body 30 is fixed on base 80 and two of foaming box body 30 sides by least one supporting leg 150 and is also connected with base 80; Electric fan 44 is arranged on the top of foaming box body 30 by the hole at foaming box body 30 top; Heating rod 43 is fixed on foaming box body 30 top by the mode of welding or be threaded; Temperature control mechanism 45 is arranged on foaming box body 30 top, and it is inner that its temp probe 451 stretches into foaming box body 30.
Between foaming box body 30 two inwalls, erection has many backing rolls 160 for supporting soft screen cloth 50, backing roll 160 be arranged so that the horizontal development of foaming section 53, thermoplastic granulates pellet 11 is carried more steady.The setting of backing roll 160, not only can support soft screen cloth 50, also makes the thermoplastic granulates pellets 11 such as TPU pellet be evenly distributed on soft screen cloth 50 and avoid pellet bulk.
Base 80 is provided with regulating wheel 170 and four rollers 180 for spacing soft screen cloth 50 4 corners, regulating wheel 170 is fixed on and is installed on base 80, the setting and this part raises up on regulating wheel 170 is resisted against in the middle part of circulation section 54, soft screen cloth 50 fixes on roller 180 by the prefastened of regulating wheel 170, roller 180 to be arranged on base 80 by fixed axis 190 and roller 180 is installed in the middle part of fixed axis 190 by connecting key, the both ends of fixed axis 190 are respectively equipped with the bearing 200 matched with corresponding roller 180, bearing 200 is seated in bearing 200 bore that base 80 is offered.
On the downside of water vapour injection pipe 41, be welded with multiple tooth bar 210, foaming box body 30 is installed with and tooth bar 210 multiple gear 220 one to one, further, gear 220 is fixed in the installation shaft through foaming box body 30 by key.Such vibrational power flow, makes the vertical position of water vapour injection pipe 41 adjustable, and then controls water vapour injection pipe 41 and the distance of soft screen cloth 50, ensures foaming effect.
Scraping mechanism 100 is welded on the right side of base 80; The below being positioned at scraping mechanism 100 placed by product-collecting case 90, and weight detecting alarm 91 is arranged on the below that product-collecting case 90 is placed; Drain valve 230 is installed bottom foaming box body 30; Base 80 is also installed with the variable-frequency motor 240 be positioned at below one of them fixed axis 190, variable-frequency motor 240 is connected with this fixed axis 190 axle by belt 250, and then drives soft screen cloth 50 cycle rotation.
Concrete, in the utility model, the edge of soft screen cloth 50 passes through from the opening of foaming box body 30 both sides, can effectively prevent thermoplastic granulates pellet 11 from the both sides landing of soft screen cloth 50.Further preferred below soft screen cloth 50, foaming box body 30 both sides install baffle plate, the distance of baffle plate and soft screen cloth 50 is preferably less than 2mm, soft screen cloth 50 both sides can be made to be close to baffle plate and can reach above-mentioned effect equally.
The vapours of water vapour injection pipe 41 is prepared by the steam generator of outside, and the import through water vapour injection pipe 41 enters pipeline; The temperature and pressure of steam generator is adjustable, to ensure the temperature and pressure reaching the most applicable foaming in foaming box body 30; Preferred water steam-jet siphon road 41 is set to many and arranged in parallel, is connected with multiple-pass joint; Have equidistant jet 411 above pipeline, the pitch-row of adjacent two jets 411 is set to 1cm-10cm, to make water vapour 42 be evenly distributed, and then makes foamed thermoplastic even particle size.
Further, the setting of electric fan 44 coordinates with water vapour injection pipe 41 closely, by its stirring action to water vapour 42, the vapours in foaming box body 30 (water vapour 42) can be made to be evenly distributed, and then reduction local temperature difference, make the size of foaming foamed thermoplastic particle even.
Heating rod 43 1 aspect plays auxiliary water steam 42 makes temperature in foaming box body 30 maintain constant effect, on the other hand, because temperature raises, humidity can reduce, so also play the effect reducing foaming box body 30 humidity, expanded beads adhesion can be avoided, be conducive to promoting foaming effect simultaneously.
Temperature control mechanism 45 can measure the temperature in foaming box body 30, and according to the switch of the size adjustment external steam generator of setting value and the temperature of heating rod 43, make the temperature in foaming box body 30 maintain constant scope, avoid temperature fluctuation on the impact of foaming effect.
In actual production process, through measuring, after foaming, the path scope of TPU particle is 1mm-5.5mm, and large footpath scope is 3mm-9mm, the top of preferred scraping mechanism 100 is less than or equal to 1mm, to ensure that the particle foamed all scrapes by scraping mechanism 100 apart from the distance of soft screen cloth 50.
Water vapour injection pipe 41 is arranged with three drive mechanisms be made up of gear 220, tooth bar 210; The shaft extension be connected with gear 220 goes out foaming box body 30, and preferred extension is installed and shaken handle on the other hand.By shaking manual rocking handle, can rotate by driven gear 220, and then realize the upper and lower displacement of tooth bar 210 related water vapour injection pipe 41, and then the vertical height that can realize water vapour injection pipe 41 regulates, in order to avoid water vapour 42 hypertonia, thermoplastic granulates pellet 11 is rushed.
In the present case, water vapour 42 distribution apparatus not only can be set to above-mentioned water vapour injection pipe 41, and a kind of top surface close with foaming box body 30 size also can be adopted to offer the cellular board of mesh, and mesh size and pitch-row can be offered according to demand.
Further, the up-down mode of above-mentioned water vapour injection pipe 41 does not also adopt the kind of drive of gear 220, tooth bar 210 only, and screw-driven or movable pulley, the fixed pulley kind of drive also can be adopted to regulate vertical height.
Above-mentioned drain valve 230 is arranged on bottom foaming box body 30, to get rid of the ponding that in foaming box body 30, water vapour 42 condensation produces, improves the reliability of work.
Further, middle recessed form also can be designed to bottom foaming box body 30, be provided with mouthpiece in recessed side and install above-mentioned drain valve 230 at this mouthpiece place, recessed form can make ponding collect, and is conducive to the ponding in foaming box body 30 to drain.
Preferred base 80 is provided with support, and above-mentioned regulating wheel 170 is arranged on the support of base 80, can move up and down, thus can regulate the height of regulating wheel 170, and then controls the pretension degree of soft screen cloth 50 on roller 180.
Operationally, variable-frequency motor 240 drives fixed axis 190 to rotate to this foam device, thus drives soft screen cloth 50 to rotate, and controls translational speed scope adjustable in 0m/min-10m/min.
Product-collecting case 90 in preferred this case is placed on weight detecting alarm 91, when in product-collecting case 90 reach preset weight time, weight detecting alarm 91 is reported to the police, can realize weight per unit length packaging.
In sum; the utility model protects a kind of thermoplastic granulates foaming materials device and foam process thereof; the foaming of automation continous way thermoplastic granulates steam can be realized; change the shortcoming that traditional still foam technique is discontinuous, can not realize automation, foamed thermoplastic granulated batchization can be realized and produce.
In the utility model, the high-pressure osmosis structure of foam device is primarily of CO
2gas bomb 120, booster pump 140, infiltration still 20, relief valve 22 are formed, for by supercritical CO
2be dissolved in the thermoplastic granulates pellets 11 such as TPU pellet, the foaming structure of foam device is by Structure composing such as precompressed tank 60, hopper 71, gear 220, variable-frequency motor 240, soft screen cloth 50, water vapour injection pipe 41, foaming box body 30, electric fan 44, heating rod 43, temperature control mechanism 45, scraping mechanism 100, product-collecting case 90, weight detecting alarms 91, the main working process of foam device is as follows: enter hopper 71 through precompressed tank 60 lower openings after the thermoplastic granulates pellet 11 after overcritical infiltration enters precompressed tank 60, and then to be distributed on the soft screen cloth 50 that matches with gear 220 by hopper 71, soft screen cloth 50 carries thermoplastic granulates pellet 11 through the drive of gear 220 and moves to the opposite side of foaming box body 30 in foaming box body 30, thermoplastic granulates pellet 11 starts to foam through water vapour 42 and heating rod 43 acting in conjunction in moving process, when thermoplastic granulates pellet 11 arrives outlet side, expanded beads reaches maximum, scrape finally by scraping mechanism 100, fall in product-collecting case 90, this foam device is preferred for foaming TPU particle, this device can be used for equally the infiltration of the thermoplastic granulates materials such as PP particle, PVC granule, PE particle saturated after foaming, be not only confined to a kind of material of TPU particle.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (10)
1. a thermoplastic granulates foaming materials device, is characterized in that: comprising:
Infiltration still, be set at least one, described infiltration still has the cavity volume of store heat plastic particle pellet, and described infiltration still is used for supercritical CO
2infiltrate through thermoplastic granulates pellet and draw off the thermoplastic granulates pellet after overcritical infiltration;
Foaming box body, foaming mechanisms is provided with and for carrying the soft screen cloth of thermoplastic granulates pellet in described foaming box body, described soft screen cloth is provided with foaming entrance and foaming outlet, the thermoplastic granulates pellet that described foaming entrance draws off for receiving infiltration still, the foamable that described foaming mechanisms continues the thermoplastic granulates pellet on soft screen cloth, described foaming outlet is used for the thermoplastic granulates finished product after by foaming and draws off foaming box body;
Variable-frequency motor, is connected with described soft screen cloth and for regulating the transfer rate of soft screen cloth.
2. a kind of thermoplastic granulates foaming materials device according to claim 1, it is characterized in that: described soft screen cloth vibrational power flow and be divided into foaming section and the circulation section that is positioned at outside foaming box body ringwise, the two ends of described foaming section are run through respectively and are passed through foaming box body, described foaming entrance is positioned at the head end of foaming section and arranges near foaming box body sidewall, and described foaming outlet is positioned at the end of foaming section and arranges near foaming box body sidewall.
3. a kind of thermoplastic granulates foaming materials device according to claim 2, it is characterized in that: described foaming mechanisms comprises the water vapour injection pipe be arranged on below foaming section, described water vapour injection pipe is provided with for the multiple jets to foaming section injection water steam, described water vapour injection pipe is arranged in foaming box body by gear & rack structure or screw drive structure or movable and fixed pulley structure movement, and described water vapour injection pipe can realize vertical displacement and its two ends are arranged near foaming box body madial wall respectively.
4. a kind of thermoplastic granulates foaming materials device according to claim 3, is characterized in that: described water vapour injection pipe replaces with the cellular board of band mesh.
5. a kind of thermoplastic granulates foaming materials device according to Claims 2 or 3, it is characterized in that: described foaming mechanisms also comprise be arranged on foaming section above and with foaming section just to the heating rod arranged, described heating rod is set at least one and is detachably arranged on foaming box body.
6. a kind of thermoplastic granulates foaming materials device according to claim 5, it is characterized in that: described foaming box body is also provided with at least one electric fan arranged with heating rod homonymy, be outside equipped with temperature control mechanism at foaming box body, described temperature control mechanism is provided with and is arranged on foaming box body and the temp probe be positioned at above foaming section.
7. a kind of thermoplastic granulates foaming materials device according to claim 1 or 2 or 3, it is characterized in that: described foaming box body is installed with precompressed tank, the thermoplastic granulates pellet that described precompressed tank is sent for receiving infiltration still, and be discharged into the foaming entrance of soft screen cloth, be provided with voltage-regulating system and temperature control system in described precompressed tank.
8. a kind of thermoplastic granulates foaming materials device according to claim 7, it is characterized in that: described foaming box body is also installed with the hopper be positioned at below precompressed tank, described hopper upper end is provided with the supplied materials mouth for receiving the thermoplastic granulates pellet that precompressed tank draws off, described hopper bottom is provided with the discharging opening that the thermoplastic granulates pellet received is discharged into soft screen cloth foaming entrance, is provided with the baffle plate of discharge adjustable mouth opening aperture in hopper underside.
9. a kind of thermoplastic granulates foaming materials device according to claim 1 or 2 or 3, it is characterized in that: this thermoplastic granulates foaming materials device also comprises base, described foaming box body is detachably arranged on base, described soft screen cloth is movably arranged on base, being outside equipped with the product-collecting case with weight detecting alarm at base, described base being provided with for foaming being exported the scraping mechanism that the thermoplastic granulates finished product drawn off sends into product-collecting case.
10. a kind of thermoplastic granulates foaming materials device according to claim 1 or 2 or 3, is characterized in that: in infiltration still, hang the material basket be provided with for holding thermoplastic granulates pellet, and described material basket is that mesh is arranged.
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| CN201520872216.7U CN205097443U (en) | 2015-11-04 | 2015-11-04 | Thermoplasticity granular material device that foams |
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| CN201520872216.7U CN205097443U (en) | 2015-11-04 | 2015-11-04 | Thermoplasticity granular material device that foams |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493968A (en) * | 2016-12-15 | 2017-03-15 | 北京化工大学 | A kind of method and device of the production foaming product that combines with 3D printing |
| WO2020048284A1 (en) * | 2018-09-08 | 2020-03-12 | 广东奔迪新材料科技有限公司 | In-mold foam molding device for thermoplastic polymer particle, and molding method therefor |
-
2015
- 2015-11-04 CN CN201520872216.7U patent/CN205097443U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493968A (en) * | 2016-12-15 | 2017-03-15 | 北京化工大学 | A kind of method and device of the production foaming product that combines with 3D printing |
| WO2020048284A1 (en) * | 2018-09-08 | 2020-03-12 | 广东奔迪新材料科技有限公司 | In-mold foam molding device for thermoplastic polymer particle, and molding method therefor |
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