CN208118254U - A kind of macromolecule polymer material supercritical fluid foam device - Google Patents
A kind of macromolecule polymer material supercritical fluid foam device Download PDFInfo
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- CN208118254U CN208118254U CN201820317697.9U CN201820317697U CN208118254U CN 208118254 U CN208118254 U CN 208118254U CN 201820317697 U CN201820317697 U CN 201820317697U CN 208118254 U CN208118254 U CN 208118254U
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Abstract
The utility model discloses a kind of macromolecule polymer material supercritical fluid foam device, including mold, gas cylinder, booster, the first air valve, the second air valve, third air valve and radio-frequency power supply, there is die cavity on mold, the air inlet and gas vent for connecting logical die cavity are provided on mold, gas cylinder, the first air valve, booster, the second air valve and mold air inlet be sequentially connected, third air valve is connected on the gas vent of mold.Compared with prior art, the utility model homogeneous heating, heating speed it is fast, it can be achieved that macromolecule polymer material it is quick, efficiently, equably foam.
Description
Technical field
The utility model relates to polymer foaming equipment technical fields, and in particular to be a kind of macromolecule polymer material
Supercritical fluid foam device.
Background technique
High molecular polymer foamed material is widely used in the fields such as heat-insulated, sound insulation, damping, shoemaking.It is currently used poly-
Closing object foaming materials mode has physical blowing and chemical blowing.Chemical blowing process, which refers to, is total to chemical foaming agent and polymer material
After mixed, at a certain temperature, chemical foaming agent is thermally decomposed, and generating gas is polymer material foaming, at present heating method master
Will or Electric heating, energy consumption it is high, the problems such as inefficiency, while there are peculiar smell weights for chemical foaming agent, not environmentally, have certain
Toxic side effect the problems such as.Physical blowing typically refers to supercritical fluid foaming technique, the gas as used in physical blowing
Usually carbon dioxide or nitrogen, therefore, very environmental protection.
In recent years, physical foaming technology becomes the emerging technology in polymer material foaming field.Currently, polymer physics is sent out
There are mainly three types of bubble modes.The first is extrusion foaming, i.e., by the polymer dissolved with supercritical fluid from single screw rod or double spiral shells
It is squeezed out in bar extruder, it is qualitative at sheet material or plate, the material of this available high-foaming of method, but foaming material by die orifice
Expect that shape is single, can only be sheet material or club-shaped material；Second is by the way that the polymer for being dissolved with supercritical fluid to be squeezed into
In mold, polymer foams in mold, and this mode can obtain the foamed material of special shape, but can only obtain foaming times
The small material of rate；The third method is kettle foam, i.e., material is put into autoclave, and ventilation applies pressure, and then electricity consumption adds
Heat or oil heating, by heat by passing to the polymer material in autoclave inward outside, obtaining foamed material is usually the grain that foams
These expanded particles need to be carried out hot-forming, this available high-foaming of method times such as the E-TPU material of Ba Fusi by son
The expanded particle of rate, but the foamed material of special shape cannot be obtained, electric heating and oil heating all have that energy consumption is high.This
Outside, in first method and second method, required the device is complicated, and cost is high.Traditional physical foaming technology is because being related to electricity
Heating or oily heating problems, since electric heating process is to heat polymer material by heat transfer, meeting long there are heating time
Occur that local heating temperature is excessively high and the problems such as there are still heating dead angles for partial region.
In consideration of it, inventor furthers investigate the above problem, there is this case generation then.
Utility model content
The purpose of this utility model is to provide a kind of homogeneous heatings, and heating speed is fast, high-efficient high molecular polymer
Material supercritical fluid foam device.
In order to achieve the above objectives, the solution of the utility model is：
A kind of macromolecule polymer material supercritical fluid foam device, including mold, gas cylinder, booster, the second air valve
With third air valve, there is on the mold die cavity, be provided with the air inlet and gas vent for being connected to the die cavity, institute on the mold
The air inlet for stating gas cylinder, the booster, second air valve and the mold is sequentially connected, and the third air valve is connected to institute
It states on the gas vent of mold, it is characterised in that：The first air valve, the mold are also equipped between the gas cylinder and the booster
Including upper die and lower die, the insulation spacer to seal when being provided between the upper mold and the lower die for molding, institute
Constitute closed above-mentioned die cavity after stating upper mold, the lower die and insulation spacer molding, the upper mold and the lower die it is outer
Surface is provided with insulating layer, and the outer surface of the insulating layer is coated with metal shell；The air inlet be located at the upper mold or
In the lower die, and run through the insulating layer and the metal shell, the gas vent is located at the lower die or the upper mold
On, and run through the insulating layer and the metal shell；It further include having radio-frequency power supply, the upper mold is to lead with the lower die
The two poles of the earth of electric metal or conductive non-metals, the radio-frequency power supply are connect with the upper mold and the lower die respectively through cable.
Preferably, the upper mold and the lower die are mould steel.
Preferably, the cable is the cable with shielding battery wave energy.
Preferably, one layer is coated on the inner wall of the die cavity for improving the Teflon of the die cavity anti-adhesive properties.
By adopting the above technical scheme, the beneficial effects of the utility model are：One, conventional supercritical fluid foam process mistake is solved
The technical problems such as uneven are heated in journey；Realize supercritical foaming in mould；Realize the skilful of supercritical foaming and radiothermics
Wonderful combination.Two, the utility model overcomes the defect of traditional technology, results from microwave in die cavity, solves in traditional chemical foaming
The technical problems such as uneven are heated during electric heating, promote heating speed, and realization is rapidly and efficiently foamed.Three, the utility model
In, mold is conductive metal or conductive non-metals, and after opening radio-frequency power supply, mold can directly issue high-frequency radio frequency, should not
There is the physical property for penetrating radio frequency on modulus tool, advantageously reduces the requirement of mold.Four, in the utility model, the appearance bread of mold
It is wrapped with insulating layer, is coated with metal shell in the outer surface of insulating layer, insulating layer can play insulation effect, reduce thermal energy damage
Consumption, while barrier radio frequency can also be played the role of and leaked, metal shell plays shielded radio frequency and avoids leaking, logical in this way
One layer of barrier radio frequency and one layer of shielded radio frequency are crossed, radio frequency is effectively prevented from and leaks, it is safer, guarantee safety in production.Work as worker
It, can be from the radiation of radio frequency when carrying out high molecular material foaming using the technical solution of the utility model.Five, the utility model
Also PU, TPU, EVA, PE, PP, the foaming of SEBS and other elastomeric materials or intermingling material be can be widely applied to.Even if right
It, can also be by the way that highly polar high molecular material or inorganic material be blended in not absorbing radio frequency or the weak polymer material of polarity
Radio frequency absorption agent is served as, to realize radio frequency heating.Therefore, the utility model has broad application prospects, and has important
Application value.
Detailed description of the invention
The utility model is described in detail by following specific embodiment and attached drawing for ease of explanation,.
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the cross-sectional view of the TPU foamed material obtained using the technical solution of the utility model (using the utility model
Technical solution obtain TPU foamed material abscess shape appearance figure).
In figure：
1- gas cylinder；2- booster；
3- die cavity；
31- air inlet；32- gas vent；
The first air valve of 51-；
The second air valve of 52-；53- third air valve；
61- upper mold；62- lower die；
7- insulation spacer；8- insulating layer；
9- metal shell；10- radio-frequency power supply；
11- cable.
Specific embodiment
In order to which the technical solution of the utility model is explained further, below by specific embodiment come to the utility model into
Row elaborates.
Radio frequency is a kind of abbreviation of high-frequency ac variation electromagnetic wave, and frequency range is between 300KHz~30GHz.Wherein,
Microwave frequency band (300MHz-300GHz) is the higher frequency band of radio frequency again.Traditional radio frequency heating mainly utilizes high band microwave pair
Object effect has heating speed fast, the characteristics of being heated evenly to achieve the purpose that heating.This heating method is mainly used for
The heating lamp of food, such as the micro-wave oven of household.
As shown in Figs. 1-2, the macromolecule polymer material supercritical fluid foam device of the utility model, including mold,
Gas cylinder 1, booster 2, the first air valve 51, the second air valve 52 and third air valve 53 have die cavity 3 on mold, are provided on mold
Be connected to the air inlet 31 and gas vent 32 of die cavity 3, gas cylinder 1, the first air valve 51, booster 2, the second air valve 52 and mold into
Through being sequentially connected, third air valve 53 is connected on the gas vent 32 of mold stomata 31, and mold includes upper mold 61 and lower die 62, upper mold
The insulation spacer 7 to seal when being provided between 61 and lower die 62 for molding, upper mold 61, lower die 62 and insulation spacer 7
Constitute closed above-mentioned die cavity 3 after molding, the outer surface of upper mold 61 and lower die 62 is provided with insulating layer 8, insulating layer 8 it is outer
Surface is coated with metal shell 9；Air inlet 31 is located in upper mold 61, and runs through the corresponding position of insulating layer 8 and metal shell 9
Place, gas vent 32 are located in lower die 62, and run through the corresponding position of insulating layer 8 and metal shell 9；It further include having radio frequency
Power supply 10, upper mold 61 and lower die 62 are conductive metal or conductive non-metals, the two poles of the earth of radio-frequency power supply 10 through cable 11 respectively with
Upper mold 61 and lower die 62 connect.
Among the above, specifically：Gas cylinder 1, the first air valve 51, booster 2 and the second air valve 52 are sequentially connected through connecting tube,
Second air valve 52 is connected through the air inlet 31 of connecting tube or Pipe connecting fitting and mold, and third air valve 53 connects through connecting tube or tube body
The connection of the gas vent 31 of fitting and mold, connecting tube here, pipe connections are this field routine tube body and pipe connections.
As one preferred, upper mold 61 and lower die 62 are mould steel.
Preferably, cable 11 is the cable with shielding battery wave energy.Here cable 11 is conventionally known one kind
Cable, i.e.,：Refer to that one layer of metal mesh is wrapped up on normal cable surface again, plays the cable of electromagnetic shielding action.
Preferably, one layer is coated on the inner wall of die cavity 3 for improving the Teflon of the die cavity anti-adhesive properties.
Among the above, air inlet 31 and gas vent 32, the also lower die 62 of upper mold 61, which no matter is arranged in, all has identical functions, no
Influence the globality and exploitativeness of technical solutions of the utility model.32 set-up mode of the utility model air inlet 31 and gas vent
Air inlet 31 and gas vent 32 are arbitrarily arranged in upper mold 61 or lower die 62, can reach same by only a kind of preferred embodiment
Effect.
It should be noted that：The effect of metal shell 9 in upper mold 61 and lower die 62 is that shielded radio frequency avoids radio frequency from leaking,
Ensure that user will not be arrived when using the device of the utility model by radio-frequency radiation, it is safer.The high score of the utility model
The structure of sub- polymer material supercritical fluid foam device is also fairly simple easily fabricated and installs.
The effect of insulating layer 8 separates metal shell 9 and upper mold 61 and lower die 62, realizes that electricity is not turned on.Insulation spacer 7
Effect is partition upper mold 61 and lower die 62, and upper mold 61 and 62 insulated barriers of lower die are opened, and is not turned on the two electricity, to work as upper mold
After 61 connect radio-frequency power supply 10 with lower die 62, upper mold 61 and lower die 62 generate high frequency oscillating current, and high-frequency oscillating circuits can generate
Higher-order of oscillation electric field, and then radio frequency is generated in entire die cavity 3.Radio frequency continuous roundtrip in die cavity 3, to make entire mould
Polymer material in chamber 3 is heated evenly.
The effect of booster 2 is that gas pressure is promoted to pressure needed for reaching supercriticality or more.It can protect in this way
Compressed gas in card injection die cavity 3 is supercriticality, convenient for dissolving in inside the polymer material after radio frequency heating, favorably
In the abundant foaming of polymer material.
Known in polymer shaping foaming process, need to use mold.The prior art is by mold together with the height in mold
Molecular material is put into closed microwave radiation space together, heats to high molecular material, similar to microwave common in life
Stove heating food.However, fortune foams in this way, macromolecule foaming has special requirement to mold, it is necessary to which being can
The material for penetrating microwave just can serve as mold, for example metal material cannot be used as mold, and which limits radio frequency heatings
Application because in many macromolecule foaming product foaming process, it is desirable that mold is by enough pressure resistances, the performances such as heatproof.This reality
Novel upper mold 61 and lower die 62 are used except as in addition to the molding mold of polymer foaming, also as the positive and negative of generation radio frequency
Electrode can overcome the above problem completely.In addition, mold employed in the utility model be conductive metal or conductive non-metals,
Also solve the problems, such as that mold materials have particular/special requirement.
A kind of macromolecule polymer material supercritical fluid foam device of the utility model and foaming method can be extensive
For PU, TPU, EVA, PE, PP, the hair of SEBS (SEBS thermoplastic elastomer (TPE)) and other elastomeric materials or intermingling material
Bubble.It, can also be by the way that highly polar high molecular material be blended even for radio frequency or the weak polymer material of polarity is not absorbed
Or inorganic material serves as radio frequency absorption agent, to realize radio frequency heating.
SEBS is saturation type SBS or Hydrogenated SBS, is to add hydrogen that double bond is made to be saturated and be made by extraordinary type SBS, SBS exists
Moderately orientation adds hydrogen in the presence of catalyst, then so that polybutadiene segments is hydrogenated to polyethylene (E) and polybutene (B) chain drum, therefore claim
For SEBS.Equally, make polyisoprene therein be changed into poly- second after SIS hydrogenation to look forward or upwards (E) and polypropylene segment, then obtain saturation type
SIS(SEPS)。
A kind of macromolecule polymer material supercritical fluid foaming method of the utility model is original with TPU polymer material
Material, for selection carbon dioxide gas is as physical blowing agent, concrete operation step is as follows：
(1) blowing molds：The first air valve 51, the second air valve 52 and third air valve 53 are first closed, then TPU to be foamed is gathered
It closes object material to be placed in the die cavity 3 of mold, then is molded, then by existing common hold-down mechanism to the mold after molding
It is compressed.
In step (1), in the die cavity 3 that TPU polymer material to be foamed is placed in mold before, in advance in die cavity 3
Inner wall on be coated with one layer for improving the Teflons of 3 anti-adhesive properties of die cavity.Common hold-down mechanism is conventional foaming sulphur
Change instrument, and the mold after molding is compressed by conventional methods.Teflon material coating after be it is permanently effective, as mould
Cavity wall uses.So the number of 3 inner wall of die cavity coating Teflon is brushed according to actual production, do not need repeatedly
It repeats to brush.Therefore, it is only to need to brush a Teflon using the utility model method, is carried out with the utility model method
Second, when the inferior foaming of third time, N, all without brushing a Teflon again.
Wherein, Teflon is polytetrafluoroethylene (PTFE) (Polytetrafluoroethylene), english abbreviation PTFE, (custom
Claim " King, Harrar "), in China, due to the reason of pronunciation, " Teflon " this trade mark be referred to as again " Teflon ", "
Teflon ", " the rich dragon of iron ", " Teflon ", " teflon " etc., it is all the transliteration of " Teflon ".The product of this material is general
It is referred to as " non-sticking lining ", is a kind of artificial synthesized high molecular material for having used fluorine to replace all hydrogen atoms in polyethylene.This
Kind material has the characteristics that antiacid alkali resistant, resists various organic solvents, is practically insoluble in all solvents.Meanwhile polytetrafluoroethylene (PTFE)
Have the characteristics that resistant to high temperature, its coefficient of friction is extremely low, so can make lubricating action way, also becomes in non-stick cooker and water pipe
The ideal coating of layer.
(2) physical blowing agent is filled：Start booster 2, opens the first air valve 51 for the carbon dioxide gas in gas cylinder 1
It is sent into booster 2, carbon dioxide gas is compressed to 15MPa by booster 2, at this point, booster 2 is pressed carbon dioxide gas
It shortens supercritical fluid into, then opens the second air valve 52 again, supercritical fluid is automatically injected in the die cavity 3 of mold.
In step (2), carbon dioxide gas is compressed critical pressure needed for forming supercritical fluid or more (two by booster 2
The critical pressure of carbon oxide gas is 7.39MPa).It can guarantee that the compression carbon dioxide gas injected in die cavity 3 is super in this way
Critical state inside TPU polymer material, is conducive to TPU polymer material and is sufficiently foamed into convenient for dissolving in after radio frequency heating
Type.What needs to be explained here is that：Supercritical fluid is the special state of similar fluid.Every kind of gas obtains shooting flow state
Minimum pressure is referred to as critical pressure, and the critical pressure of carbon dioxide is 7.39MPa, and the critical pressure of nitrogen is：3.4MPa.
(3) heat：Radio-frequency power supply 10 is opened, mold generates high-frequency radio frequency, and the TPU polymer material in die cavity 3 exists
It is heated under the high-frequency radio frequency effect that mold generates, supercritical fluid dissolves and enters inside TPU polymer material.
In step (3), the high frequency vibration that generates swings electric field between upper mold 611 and lower die 622, and TPU is highly polar macromolecule material
Material, molecule can ceaselessly conversion direction therewith under higher-order of oscillation electric field.As polar molecule constantly turns to, touch each other
It hits, phase mutual friction generates heat in turn, and then increases TPU polymer material own temperature, is heated to TPU polymer material
After required temperature, radio-frequency power supply 108 is closed.It should be strongly noted that the height of temperature be by polymer material property and
Frothing percentage of desired product etc. is because usually setting.The temperature Gao Yuegao usually in certain temperature range, frothing percentage is just high, because
Higher for polymer material temperature, the supercritical fluid dissolved in the polymer is more.
(4) decompression foaming：The second air valve 52 is first closed, then opens third air valve 53, air pressure dramatic decrease, molten in die cavity 3
The supercritical fluid that solution enters inside TPU polymer material expands rapidly, and TPU polymer material foams and is full of entire die cavity 3.
(5) be opened pickup, close in the first air valve 51 and booster 2, then opening steps (1) to the mold after molding into
The existing common hold-down mechanism that row compresses, after existing common hold-down mechanism fully opens, then opens mold, takes out TPU polymerization
The foamed material of object obtains the foamed material with the consistent TPU polymer of 3 shape of die cavity.
Also specifically, in addition to carbon dioxide gas is as physical blowing agent, nitrogen gas can also be used as object
Haircut infusion.So not only for limit carbon dioxide gas as physical blowing agent, the gases such as nitrogen can also equally be used as shooting flow
Body.
The macromolecule polymer material supercritical fluid foam device and foaming method of the utility model are sent out suitable for physics
Bubble, and foamed using physical blowing to high molecular polymer.Physical blowing typically refers to supercritical fluid foaming technique,
Supercritical fluid and material are placed in closed space, after being heated to certain temperature, supercritical fluid penetrates into polymeric material
In material, moment unloading pressure penetrates into the supercritical fluid in polymer material in polymer material internal expansion, is foamed
Material.The gas as used in physical blowing is usually carbon dioxide or nitrogen, very environmental protection.
Therefore, a kind of macromolecule polymer material supercritical fluid foam device of the utility model and foaming method all have
Wide application prospect has important application value.
The product form and style of above-described embodiment and schema and non-limiting the utility model, any technical field
The appropriate changes or modifications that those of ordinary skill does it all should be regarded as the patent category for not departing from the utility model.
Claims (4)
1. a kind of macromolecule polymer material supercritical fluid foam device, including mold, gas cylinder, booster, the second air valve and
Third air valve has die cavity on the mold, is provided with the air inlet and gas vent for being connected to the die cavity on the mold, described
Gas cylinder, the booster, second air valve and the mold air inlet be sequentially connected, the third air valve is connected to described
On the gas vent of mold, it is characterised in that：The first air valve, the mold packet are also equipped between the gas cylinder and the booster
Upper die and lower die are included, the insulation spacer to seal when being provided between the upper mold and the lower die for molding is described
Closed above-mentioned die cavity, the appearance of the upper mold and the lower die are constituted after upper mold, the lower die and insulation spacer molding
Face is provided with insulating layer, and the outer surface of the insulating layer is coated with metal shell；The air inlet is located at the upper mold or institute
It states in lower die, and runs through the insulating layer and the metal shell, the gas vent is located in the lower die or the upper mold,
And run through the insulating layer and the metal shell；It further include having radio-frequency power supply, the upper mold and the lower die are conduction
The two poles of the earth of metal or conductive non-metals, the radio-frequency power supply are connect with the upper mold and the lower die respectively through cable.
2. a kind of macromolecule polymer material supercritical fluid foam device according to claim 1, it is characterised in that：Institute
Stating upper mold and the lower die is mould steel.
3. a kind of macromolecule polymer material supercritical fluid foam device according to claim 1, it is characterised in that：Institute
Stating cable is the cable with shielding battery wave energy.
4. a kind of macromolecule polymer material supercritical fluid foam device according to claim 1, it is characterised in that：Institute
It states and coats one layer on the inner wall of die cavity for improving the Teflon of the die cavity anti-adhesive properties.
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| CN201820317697.9U CN208118254U (en) | 2018-03-07 | 2018-03-07 | A kind of macromolecule polymer material supercritical fluid foam device |
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| CN201820317697.9U CN208118254U (en) | 2018-03-07 | 2018-03-07 | A kind of macromolecule polymer material supercritical fluid foam device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108372620A (en) * | 2018-03-07 | 2018-08-07 | 泉州师范学院 | A kind of macromolecule polymer material supercritical fluid foam device and foaming method |
| CN109571847A (en) * | 2019-01-07 | 2019-04-05 | 山东大学 | A kind of multistage control pressurer system of supercritical fluid for polymer batch-foamed and method |
| CN111283946A (en) * | 2020-02-20 | 2020-06-16 | 东莞海瑞斯新材料科技有限公司 | Material foaming method for in-mold foaming molding |
-
2018
- 2018-03-07 CN CN201820317697.9U patent/CN208118254U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108372620A (en) * | 2018-03-07 | 2018-08-07 | 泉州师范学院 | A kind of macromolecule polymer material supercritical fluid foam device and foaming method |
| CN109571847A (en) * | 2019-01-07 | 2019-04-05 | 山东大学 | A kind of multistage control pressurer system of supercritical fluid for polymer batch-foamed and method |
| CN111283946A (en) * | 2020-02-20 | 2020-06-16 | 东莞海瑞斯新材料科技有限公司 | Material foaming method for in-mold foaming molding |
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