CN104275766A - Device for trapping and recycling supercritical fluid during mould pressing foaming process - Google Patents
Device for trapping and recycling supercritical fluid during mould pressing foaming process Download PDFInfo
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- CN104275766A CN104275766A CN201310292613.2A CN201310292613A CN104275766A CN 104275766 A CN104275766 A CN 104275766A CN 201310292613 A CN201310292613 A CN 201310292613A CN 104275766 A CN104275766 A CN 104275766A
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Abstract
The invention discloses a device for trapping and recycling supercritical fluid during a mould pressing foaming process. The device is characterized by comprising an upper mould and a lower mould, wherein the upper mould is provided with venting devices, the lower mould comprises a reaction cabin and a collection cabin, a separation layer and a separation valve are arranged between the reaction cabin and the collection cabin, and a sealing component is arranged between the upper mould and the lower mould. Compared with the prior art, the device has the beneficial effects that when a supercritical fluid is used for preparing a polymer foaming material, gases can be effectively trapped by the device so as to control emission at a minimum, so that the gas emission is lowered greatly during the foaming process, environment protection and cleaning effects are achieved, costs are lowered, and the technical defects in the prior art are effectively overcome.
Description
Technical field
The present invention relates to a kind of moulded from foam device, be specifically related to trapping and the recycling device of supercritical fluid in a kind of moulded from foam process.
Background technology
Microcellular foam material has excellent heat resistance, wholesomeness, thermal insulation and good environmental effect etc. and is used widely gradually, especially the antidetonation energy absorption performance of its excellence is widely used in damping, buffering, noise reduction sound absorption, the fields such as the packing of product, automobile inner ornament, building heat preservation.Along with the continuous progress of process technology and goods research method, its application space will be more extensive, form huge market scale.
Number of patent application be 200810133787.3 Chinese invention patent application " PP foam material and production method thereof " (publication number is CN101538387A) disclose a kind of PP foam material and production method thereof, this patent adopts supercritical fluid extrusion foaming technique, in production process, fluid foaming agent is all injected in double screw extruder and carries out mixing extrusion pelletizing, high to extruder technological requirement, wayward, and make the content of the blowing agent in finished product bead uneven, cause product unstable.US Patent No. 7318713 discloses a kind of method utilizing overcritical injection molding technology to prepare polymer micro expanded material, supercritical fluid is imported the barrel of injection machine by the method, in barrel, form the homogeneous phase solution of polymer/supercritical fluid, homogeneous phase solution is being injected into the immediate effervescence of mould.The method is lower due to bubble nucleating speed, and the hole density obtained is less, can only realize the loss of weight that foaming product is less.The Chinese invention patent application " method of preparing polymer microporous foaming material by supercritical mould foaming " (application publication number is CN102167840A) of number of patent application 201110054581.3 provides a kind of method of preparing polymer microporous foaming material by supercritical mould foaming, comprise the steps, foaming mould on moulding press is heated up, after blowing temperature to be achieved, polymer is put into mould, moulding press matched moulds, mould seals, supercritical fluid is filled with in mould, supercritical fluid spreads to polymers swell, then moulding press die sinking pressure release foaming, polymer micro expanded material can be obtained.
We know, the whole world is faced with the series of challenges that climate warming brings, with CO
2being main room temperature air discharge, is the key factor causing greenhouse effects, therefore stops or reduces the discharge of greenhouse gases in process of production, and its effective recycling had great importance.From the patent announced at present, utilize supercritical fluid to foam and prepare polymer foam, most employing supercritical CO
2or N
2for blowing agent, directly unload and be pressed onto in air during foaming, it is pollution-free as blowing agent self environmental protection, but is discharged in air and can causes greenhouse effects.
Summary of the invention
Technical problem to be solved by this invention provides a kind of in addition to reduce gas discharging, environment-protecting clean the trapping of supercritical fluid and recycling device in cost-saving moulded from foam process for the above-mentioned state of the art.
The present invention solves the problems of the technologies described above adopted technical scheme: the trapping of supercritical fluid and recycling device in a kind of moulded from foam process, it is characterized in that: comprise upper die and lower die, described patrix is provided with air-breather, described counterdie comprises reaction cabin and collecting chamber, be provided with separation layer and separation valve door between described reaction cabin and collecting chamber, described patrix and lower intermode are provided with seal member.
As improvement, in described reaction cabin, be provided with at least one deck separation net.
As improvement, described separation net surface is provided with the through hole of evenly arrangement, and described separation net surface is provided with the fulcrum supporting separation net.
Preferably, described air-breather comprises the air inlet pipe be connected with patrix surface, and described air inlet pipe is provided with pressure-relief valve.
Preferred described seal member is rubber seal.
Compared with prior art, the invention has the advantages that: when utilizing supercritical fluid to prepare polymeric foamable material, can effective captured gas by this device, by emission control to minimum, therefore in foaming process, greatly reduce gas purging, not only environment-protecting clean but also cost-saving, effectively overcome the technological deficiency that prior art exists.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the enlarged drawing of parts I in Fig. 1.
Fig. 3 is the structural representation of separation net in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Fig. 1 to Fig. 3 is the present embodiment for the trapping of supercritical fluid in moulded from foam process and recycling device, comprise patrix 3 and counterdie 4, adopt seal member to seal between the two, be specially rubber seal 10, patrix 3 and counterdie 4 are that stainless steel is high pressure resistant to be made.The upper surface of patrix 3 is provided with air-breather, and be specially the air inlet pipe 2 be connected with patrix 3 upper surface, air inlet pipe 2 is provided with pressure-relief valve 1, to control flow and pressure; Counterdie 4 is divided into reaction cabin 5 and collecting chamber 6 two parts, and reaction cabin 5 and collecting chamber 6 are isolated by separation layer 7 between the two, and is provided with separation valve door 9 between the two.Reaction cabin 5 can be arranged for individual layer also can be multilayer, in the present embodiment, reaction cabin 5 is multilayer setting, interlayer setting is carried out especially by separation net 8, the surface of separation net 8 is provided with through hole 81 and three fulcrums 82 of multiple even arrangement, fulcrum 82 is evenly distributed on the edge of separation net 8, and the length of fulcrum 82 can free-extension and adjustment.Fulcrum 82 can support separation net 8, makes to maintain a certain distance between multilayer separation net 8, leaves enough spaces to give the foaming of polymeric material.
During this embodiment of concrete use, dropped into by polymer in the reaction cabin 5 in mould, moulding press promotes patrix 3 and counterdie 4 matched moulds, and mould seals, in reaction cabin 5, inject a certain amount of supercritical gas, closes pressure-relief valve 1 and isolating valve 9.Intensification mould to certain temperature, when polymer reaction cabin 5 be swelling to saturated after, in reaction cabin 5, inject air, simultaneously open isolating valve 9, by air by reaction cabin 5 supercritical fluid compression displacement to collecting chamber 6 li.After this close isolating valve 9, quick die sinking release, finally obtains expanded material.Upper once foam time, moulding press matched moulds, mould sealing after, open isolating valve 9, the gas in collecting chamber 6 poured reaction cabin 5, can direct circulation be used for next time foaming, to reach effective utilization and the combustion with minimal of gas.
The polymer being applicable to the present embodiment device is selected from one or more the blend in amorphous or Crystalline plastics, comprises polystyrene, Merlon, acrylonitrile-butadiene-styrene copolymer, polyimides, polyamide, polyphenylene sulfide, polyether sulfone, polyvinyl chloride, natural rubber, silicon rubber, acrylonitrile-butadiene rubber, polypropylene, polyethylene, PLA and PETG etc.; And the supercritical gas injected is CO
2, N
2or both are with the blended gas of arbitrary proportion.
In the present embodiment moulded from foam process, the trapping of supercritical fluid and the patrix of recycling device and lower intermode adopt seal member to seal, reaction cabin and collecting chamber is made to carry out in gas exchange process, pressure in cabin remains unchanged, when making to utilize supercritical fluid to prepare polymeric foamable material, can effective captured gas by this device, by emission control to minimum, therefore in foaming process, greatly reduce gas purging, not only environment-protecting clean but also cost-saving.
Claims (5)
1. the trapping of supercritical fluid and recycling device in a moulded from foam process, it is characterized in that: comprise patrix (3) and counterdie (4), described patrix (3) is provided with air-breather, described counterdie (4) comprises reaction cabin (5) and collecting chamber (6), be provided with separation layer (7) and separation valve door (9) between described reaction cabin (5) and collecting chamber (6), between described patrix (3) and counterdie (4), be provided with seal member.
2. the trapping of supercritical fluid and recycling device in moulded from foam process according to claim 1, is characterized in that: be provided with at least one deck separation net (8) in described reaction cabin (5).
3. the trapping of supercritical fluid and recycling device in moulded from foam process according to claim 2, it is characterized in that: described separation net (8) surface is provided with the through hole (81) of evenly arrangement, described separation net (8) surface is provided with the fulcrum (82) supporting separation net (8).
4. the trapping of supercritical fluid and recycling device in moulded from foam process according to claim 1 and 2, it is characterized in that: described air-breather comprises the air inlet pipe (2) be connected with patrix (3) surface, and described air inlet pipe (2) is provided with pressure-relief valve (1).
5. the trapping of supercritical fluid and recycling device in moulded from foam process according to claim 1 and 2, is characterized in that: described seal member is rubber seal (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310292613.2A CN104275766B (en) | 2013-07-11 | 2013-07-11 | Device for trapping and recycling supercritical fluid during mould pressing foaming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310292613.2A CN104275766B (en) | 2013-07-11 | 2013-07-11 | Device for trapping and recycling supercritical fluid during mould pressing foaming process |
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| Publication Number | Publication Date |
|---|---|
| CN104275766A true CN104275766A (en) | 2015-01-14 |
| CN104275766B CN104275766B (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310292613.2A Active CN104275766B (en) | 2013-07-11 | 2013-07-11 | Device for trapping and recycling supercritical fluid during mould pressing foaming process |
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Families Citing this family (1)
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|---|---|---|---|---|
| EP3925751A1 (en) * | 2020-06-18 | 2021-12-22 | Basf Se | Process for continuously producing expanded foam particles |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0972626A2 (en) * | 1998-07-16 | 2000-01-19 | Mitsui Chemicals, Inc. | Method of adding supercritical carbon dioxide to thermoplastic resin and foamed articles |
| US7318713B2 (en) * | 2002-07-18 | 2008-01-15 | Trexel, Inc. | Polymer processing systems including screws |
| CN201338361Y (en) * | 2009-01-20 | 2009-11-04 | 北京中拓机械有限责任公司 | Supercritical fluid foaming agent conveying device |
| CN102167840A (en) * | 2011-04-12 | 2011-08-31 | 姜修磊 | Method for preparing polymer microporous foaming material by supercritical mould foaming |
| CN202895561U (en) * | 2012-11-29 | 2013-04-24 | 北京物资学院 | Gas adding device |
| CN203472039U (en) * | 2013-07-11 | 2014-03-12 | 宁波大学 | Trapping and recycling device for supercritical fluid in mold-pressing foaming process |
-
2013
- 2013-07-11 CN CN201310292613.2A patent/CN104275766B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0972626A2 (en) * | 1998-07-16 | 2000-01-19 | Mitsui Chemicals, Inc. | Method of adding supercritical carbon dioxide to thermoplastic resin and foamed articles |
| US7318713B2 (en) * | 2002-07-18 | 2008-01-15 | Trexel, Inc. | Polymer processing systems including screws |
| CN201338361Y (en) * | 2009-01-20 | 2009-11-04 | 北京中拓机械有限责任公司 | Supercritical fluid foaming agent conveying device |
| CN102167840A (en) * | 2011-04-12 | 2011-08-31 | 姜修磊 | Method for preparing polymer microporous foaming material by supercritical mould foaming |
| CN202895561U (en) * | 2012-11-29 | 2013-04-24 | 北京物资学院 | Gas adding device |
| CN203472039U (en) * | 2013-07-11 | 2014-03-12 | 宁波大学 | Trapping and recycling device for supercritical fluid in mold-pressing foaming process |
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| CN104275766B (en) | 2017-02-08 |
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Effective date of registration: 20210813 Address after: Room 1903, building 5, 898 Xiuwen Road, Minhang District, Shanghai 201100 Patentee after: Weft solid anticorrosion resources (Shanghai) Co.,Ltd. Address before: No. 818, Fenghua Road, Zhenhai District, Ningbo City, Zhejiang Province Patentee before: Ningbo University |
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