CN106626201A - Unilateral cavity free foaming method - Google Patents
Unilateral cavity free foaming method Download PDFInfo
- Publication number
- CN106626201A CN106626201A CN201610860950.0A CN201610860950A CN106626201A CN 106626201 A CN106626201 A CN 106626201A CN 201610860950 A CN201610860950 A CN 201610860950A CN 106626201 A CN106626201 A CN 106626201A
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- China
- Prior art keywords
- mould
- monolateral
- lower mould
- cavity
- foaming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/027—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles the foaming continuing or beginning when the mould is opened
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
- B29C44/585—Moulds with adjustable size of the mould cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
- B29C44/588—Moulds with means for venting, e.g. releasing foaming gas
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an unilateral cavity free foaming method. A biomass material is arranged in a lower mold; an upper mold extrudes the biomass material in the lower mold for shaping by set time; the upper mold is deviated from the lower mold; the biomass material is foamed in the lower mold to realize unilateral cavity baking foaming; one of the upper mold and the lower mold is connected with a moving mechanism; and the upper mold is deviated from the lower mold under the effect of the moving mechanism after the set time of the upper mold and the lower mold extruding the biomass material. The unilateral cavity free foaming method largely shortens the product drying time, reduces the product original pulp use level, improves the product cell quality and the buffering performance, reduces the raw material use cost and the product production cost, is excellent in actual utility, and is excellent in reference on traditional mold production.
Description
Technical field
The present invention relates to biological material, more particularly to a kind of monolateral cavity free style foaming method.
Background technology
While plastic products provide convenient for human lives, product non-degradable brings serious harm to environment；To plant
Fibres and the foaming biological material that starch is prepared by raw material, are become with the advantage that its raw material is renewable, product is degradable
EPE, EPS etc. buffer the substitute of plastic products.Existing foaming biological material is all using based on traditional hot-forming work
Skill carries out production.Conventional thermocompression moulding process, slurry is placed in whole die cavity, contacts with upper/lower die surface, preparation
Foam in product foaming method insufficient, foam structure is uneven, have a strong impact on the shock-absorbing capacity of product, make Mechanical Properties of Products
It is not up to standard, and large-scale industrial production cannot be carried out meet the market demand.
The content of the invention
To overcome the deficiencies in the prior art, an object of the present disclosure to be to provide monolateral cavity free style foaming method, the party
Method greatly improves biological material product inner cell structure, and fully, uniformly, product shock-absorbing capacity improves notable to air bubble growth,
With good actual utility.
Second purpose of the invention is to provide monolateral cavity free style foaming method, by the formation of cavity, slurry first shapes,
Foam again, be easy to carry out biological material foaming, reduce material usage, reduce product manufacturing cost.
In order to reach above-mentioned purpose, the first scheme that the present invention is provided is as follows：
Monolateral cavity free style foaming method：
1) by biological material in lower mould；
2) the lower mould endogenous substance material of mould extruding is shaped to biological material on, and after setting time, upper mould is from lower mould
Depart from, monolateral foaming cavity is formed between lower mould and upper mould；
3) biological material is carried out the heating setpoint time in monolateral foaming cavity, biological material is carried out in lower mould
Foaming, realizes that monolateral cavity bakees foaming.
Part of the upper die can be embedded in the groove of lower mould, be easy to being accurately positioned for upper and lower mould；Upper mould by Action of Gravity Field or
Upper mould is connected with elevating mechanism, to realize that upper mould movement is embedded in lower mould.
In the case where upper mould departs from after mould, the monolateral foaming space for leaving setting of lower mould groove, slurry is first shaped and is foamed again, makes life
Material realizes free even foaming in fixed-direction, it is intended to improve biological material shock-absorbing capacity, while reduce material using
Amount, effectively reduces product manufacturing cost, and shaping time is controlled in 2-4s, makes biological material form complete surface.
Wherein, the travel mechanism is fixed with upper mould or with lower mould, so drives upper mould to be moved out down by travel mechanism
Mould or, drive lower mould movement, be capable of achieving upper mould and depart from from lower mould groove；Upper mould is with lower mould each using ventilative steel
Material, respectively by connector connection between top base and upper mould, bottom base and lower mould, connector can be bolt or screw.
The lower mould is fixed on bottom base upper surface, and upper mould top is fixed with top base, empty in the middle part of lower mould surface is arranged
The baffle plate of the heart, the movement in order to upper mould corresponding with lower mould groove of the hollow position of baffle plate, baffle plate, top base and bottom base are respectively
Aluminum alloy materials.
Flexible member is set between the top base and baffle plate used as described travel mechanism, the preferred bullet of flexible member
Spring, can change spring force according to biological material formula needs, carry out the adjustment of adapted biomass foaming materials requirement.No
Same foaming overdose space, the foam structure prepared inside product is different, and the mechanical property of product is different.
The flexible member is fixed with top base or flexible member is fixed with baffle plate.
The surface that the bottom base is contacted with lower mould is provided with lower deep gouge, and bottom base sinking trench bottom is distributed with air-vent,
Allow gas to discharge mould rapidly, pressure in control mold cavity.
The top base is provided with upper deep gouge with the surface that upper mould is contacted, and deep gouge top is distributed with air-vent on top base.
The upper mould is the convex wedge with the lower mould fit depressions, is realized with the wedge shape automatic positioning structure that this is formed
The precise positioning of upper and lower mould, the longitudinal cross-section of top base is T-shaped.
The step 3) in the biological material heat time be 2～3min, monolateral foaming sky cavity temperature is 190-200
DEG C, in aluminium alloy top base 1 and/or aluminium alloy bottom base 6 or surface arranges electric boiling plate, electric boiling plate and temperature control
Device connects.Because internal temperature is delivered to the certain process of needs, mold cavity interior temperature at top base or lower electrode seat temperature sensor
Degree is higher than the temperature detected at sensor, it is generally the case that when the temperature that temperature sensor detects upper mould or lower mould reaches
When 180-185 DEG C, the temperature indicated in monolateral foaming cavity reaches requirement, can control electric boiling plate and stop heating or tie up
Hold the temperature.
Arrange in temperature sensor fixing hole, temperature sensor fixing hole in the side of top base and/or bottom base and install
Temperature sensor is detecting the temperature of upper mould and/or lower mould.
The present invention provide second scheme be：
1) by biological material in lower mould；
2) the lower mould endogenous substance material of mould extruding is shaped to biological material on first, after setting time, on first
Mould departs from from lower mould, and lower mould endogenous substance material is carried out to be heated to set the first temperature；Second temperature is 90-100 DEG C, plus
The hot time is 1min；
3) mould and the second Ccope closing machine under, the length that mould can be embedded in lower mould on second is less than mould on first can be embedded into
Length in lower mould, continues that biological material is heated to set second temperature, and monolateral is formed between mould and lower mould on second
Bubble cavity；In monolateral foaming cavity is carried out to biological material the heating setpoint time, realize that monolateral cavity bakees foaming.
The length that mould can be embedded in lower mould on second is less than the length that mould can be embedded in lower mould on first, so,
Cavity is formed on second between mould and lower mould groove, biological material is foamed in lower mould；Second temperature is 190-200
DEG C, the heat time is 1min～2min, and such foaming method is because with certain flow process, it is adaptable to actual plant operation.
On described first mould with both lower moulds one of them be connected with travel mechanism, upper mould and lower mould extruding biomass
After material setting time travel mechanism effect under on mould departs from lower mould, on first mould top be fixed on top base, move
Mechanism is the spring located at top base lower surface, and using the screen resilience of spring mould resilience on first is realized, quick and convenient.The program
Middle travel mechanism, travel mechanism on first on mould or second in mould and the structure and first scheme of lower mould, upper die and lower die
Structure corresponds to respectively identical.
The present invention realizes monolateral cavity free style foaming method, this method solves existing biological material foaming, does not have
Foaming space, cell growth is insufficient, the uneven problem of inner cell structure, while the gas that material preparation process is produced
Rapid to discharge, drastically elevated pressure in release mold cavity makes biological material air entrapment fully freely give birth in cavity
It is long.Take into account bubble and fully grow steam discharge with preparation process, while devising detachable aluminium alloy baffle plate, and spring according to not
It is adjusted with foaming requirement, forms the foaming space of different surpluses, adapts to different product and require.Detachable bolted-on attachment
Structure, is easy to clean mould and safeguarded.
The present invention adopts aluminium alloy pedestal, economizes on material, solves the problems, such as that the ventilative steel market price is high, has saved mould
Production cost.Monolateral cavity free style foaming mould, compared to conventional moulded foaming, following table on biomass slurry contact mould
Face, pulp surface vapor spilling plane is less；Monolateral cavity type foaming, vapor is larger from pulp surface overflow space, and water steams
Vapour is quickly discharged from material internal, and rate of drying is very fast, and product drying time is greatly reduced, and is reduced the original slurry of product and is used
Amount, while improve product abscess quality increase shock-absorbing capacity, reduces material feedstock use cost and product manufacture production
Cost, with good actual utility, all has good reference to current mould production.
Description of the drawings
The monolateral cavity free style foaming mould profiles of Fig. 1；
The cavity free foaming process schematic of monolateral cavity free style foaming mould in Fig. 2 (a) embodiments 1；
The cavity free foaming process schematic of monolateral cavity free style foaming mould in Fig. 2 (b) embodiments 2.
The monolateral cavity free style foaming mould front views of Fig. 3；
Mould upward view on the ventilative steel of the monolateral cavity free style foaming moulds of Fig. 4 (a)；
Mould sectional view on the ventilative steel of the monolateral cavity free style foaming moulds of Fig. 4 (b)；
Mould top view under the ventilative steel of the monolateral cavity free style foaming moulds of Fig. 5 (a)；
Mould sectional view under the ventilative steel of the monolateral cavity free style foaming moulds of Fig. 5 (b)；
The aluminium alloy top base upward view of the monolateral cavity free style foaming moulds of Fig. 6 (a)；
The aluminium alloy upper base portion sectional view of the monolateral cavity free style foaming moulds of Fig. 6 (b)；
The aluminium alloy baffle plate top view of the monolateral cavity free style foaming moulds of Fig. 7 (a)；
The aluminium alloy baffle plate side view of the monolateral cavity free style foaming moulds of Fig. 7 (b).
In figure：1st, aluminium alloy top base, 2, mould on ventilative steel, 3, spring, 4, aluminium alloy baffle plate, 5, mould under ventilative steel, 6,
Aluminium alloy bottom base, 7, steam vent, 8, deep gouge under pedestal, 9, electric boiling plate, 10, monolateral foaming cavity.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Whole description.
Embodiment 1
As shown in Figure 1, Figure 2 shown in (a), monolateral cavity free style foaming method, the monolateral cavity free style foaming mould of employing
Including mould 5, aluminium alloy bottom base 6, row under mould 2, spring 3, aluminium alloy baffle plate 4, ventilative steel on aluminium alloy top base 1, ventilative steel
Deep gouge 8, electric boiling plate 9 and monolateral foaming cavity 10 under pore 7, pedestal, the combination of mould 5 is formed under mould 2 and ventilative steel on steel of breathing freely
The die cavity of mould, arranges spring 3 between aluminium alloy top base 1 and aluminium alloy baffle plate 4, as shown in figure 3, spring 3 is fixed on aluminium conjunction
The lower surface of golden top base 1, ventilative steel upper and lower mould completes matched moulds to be made after the sizing of biological material product, and mould is in spring 3 on steel of breathing freely
Rise certain distance in the presence of screen resilience, make product upper surface form monolateral foaming cavity 10, in high temperature environments product list
Free foaming is formed in the cavity of side.A large amount of gases that whole foaming process is produced, through ventilative steel mold microcellular structure base is discharged to
In the lower deep gouge 8 of seat, exhaust hole 7 is uniform-distribution with aluminium alloy in bottom base, gas is entered in steam vent 7 by deep gouge under pedestal 8
Smoothly discharge.
Monolateral foaming sky cavity temperature is 190-200 DEG C, in top base and/or bottom base or surface arranges electrical heating
Plate 9, electric boiling plate 9 is connected with temperature controller.Because internal temperature is delivered to needs at top base or lower electrode seat temperature sensor
Certain process, mould type cavity temperature is higher than the temperature detected at sensor, it is generally the case that when temperature sensor detection
When reaching 180-185 DEG C to the temperature of upper mould or lower mould, the temperature indicated in monolateral foaming cavity 10 reaches requirement, can control
Electric boiling plate processed stops heating or maintains the temperature.
In the side of aluminium alloy top base 1 and/or aluminium alloy bottom base 6, temperature sensor fixing hole, TEMP are set
Mounting temperature sensor is with the temperature of mould 5 under detecting mould 2 on ventilative steel and/or ventilative steel in device installing hole.
Whole mould, convenient disassembly is easy to clean mould and safeguarded.Mould 2 designs convex wedge on ventilative steel, steel of breathing freely
Lower mould 5 designs corresponding Reentrant Cavity, with the precise positioning that this wedge shape automatic positioning structure for being formed can realize upper and lower mould.
Wherein：Upper bottom base material is low-cost metal material aluminium alloy；
Upper/lower die adopts novel ventilated Steel material, and biomass composite lurry rheological behavior is poor, normal temperature condition following table
Sight viscosity is 200mPa/s, and heating process has a large amount of gases to discharge, and steam discharge requirement is very high, while starch microscopic dimensions show starch
Particle diameter may be selected the ventilative steel in 35 μm of apertures at 50 μm or so, so the material selection PM- of the upper and lower mould of steel of breathing freely
35-35 breathes freely steel.
Such as Fig. 4 (a), 4 (b), shown in 5 (a), 5 (b), the moisture vapor transmission of the upper and lower mould of ventilative steel can subtract as its thickness increases
It is little, and its intensity can increase with the increase of thickness, consider the moisture vapor transmission and intensity premise of the upper and lower mould of ventilative steel
Under, the ventilative steel thickness for calculating optimum through research is 15--25mm.
As shown in Fig. 6 (a), 6 (b), the material of aluminium alloy top base 1 and aluminium alloy bottom base 6 does not have gas permeability, and breathes freely
The micropore skewness of Steel material, the steam discharge performance good in order to ensure mould, therefore process on the upper and lower pedestal of aluminium alloy
The lower deep gouge of one height 3-6mm, and in the effective leaving area of the sinking, uniformly 9-18 air-vent of distribution, is guarantee
Good heat conductivility and intensity, the size of air-vent 7 should not be too big, and the diameter of air-vent 7 elects 4-6mm as.
It is detachable between aluminium alloy baffle plate 4 and upper/lower die, different springs 3 can be as needed selected, so as to be formed
The monolateral foaming cavity of different surpluses, meets the requirement for forming different foam structure materials.
Embodiment 2
Monolateral cavity free style foaming method, shown in such as Fig. 2 (b),
1) by biological material in lower mould；
2) the lower mould endogenous substance material of mould extruding is shaped to biological material on first, after setting time, on first
Mould departs from from lower mould, and lower mould endogenous substance material is carried out to be heated to set the first temperature；Second temperature is 90-100 DEG C, plus
The hot time is 1min；
3) mould and the second Ccope closing machine under, the length that mould can be embedded in lower mould on second is less than mould on first can be embedded into
Length in lower mould, continues that biological material is heated to set second temperature, and monolateral is formed between mould and lower mould on second
Bubble cavity；In monolateral foaming cavity is carried out to biological material the heating setpoint time, realize that monolateral cavity bakees foaming.
On described first mould with both lower moulds one of them be connected with travel mechanism, upper mould and lower mould extruding biomass
After material setting time under travel mechanism's effect on mould departs from lower mould, travel mechanism can be that electric cylinders or other power are filled
Put.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. monolateral cavity free style foaming method, it is characterised in that
1) by biological material in lower mould；
2) the lower mould endogenous substance material of mould extruding is shaped to biological material on, and after setting time, upper mould departs from from lower mould,
Monolateral foaming cavity is formed between lower mould and upper mould；
3) biological material is carried out the heating setpoint time in monolateral foaming cavity, biological material carries out sending out in lower mould
Bubble, realizes that monolateral cavity bakees foaming.
2. monolateral cavity free style foaming method as claimed in claim 1, it is characterised in that in upper mould and both lower moulds wherein
One of be connected with travel mechanism, after upper mould and lower mould extruding biological material setting time under travel mechanism's effect on mould with
Lower mould departs from.
3. monolateral cavity free style foaming method as claimed in claim 2, it is characterised in that the lower mould is fixed on bottom base
Upper surface, upper mould top is fixed with top base, and the hollow baffle plate in the middle part of lower mould surface is arranged, the hollow position of baffle plate is recessed with lower mould
The corresponding movement in order to upper mould of groove.
4. monolateral cavity free style foaming method as claimed in claim 3, it is characterised in that the top base and baffle plate it
Between arrange flexible member as described travel mechanism；
The flexible member is fixed with top base or flexible member is fixed with baffle plate.
5. monolateral cavity free style foaming method as claimed in claim 3, it is characterised in that the step 3) in biomass
The material heat time is 2～3min, and monolateral foaming sky cavity temperature is 190-200 DEG C；
Further, in top base and/or bottom base or surface arranges electric boiling plate, electric boiling plate and temperature controller connect
Connect.
6. monolateral cavity free style foaming method as claimed in claim 3, it is characterised in that the bottom base is contacted with lower mould
Surface be provided with lower deep gouge, bottom base sinking trench bottom is distributed with air-vent.
7. monolateral cavity free style foaming method as claimed in claim 3, it is characterised in that the top base is contacted with upper mould
Surface be provided with deep gouge, deep gouge top is distributed with air-vent on top base.
8. monolateral cavity free style foaming method as claimed in claim 3, it is characterised in that the upper mould is and the lower mould
The convex wedge of fit depressions, the longitudinal cross-section of top base is T-shaped.
9. monolateral cavity free style foaming method, it is characterised in that
1) by biological material in lower mould；
2) the lower mould endogenous substance material of mould extruding is shaped to biological material on first, after setting time, on first mould from
Lower mould departs from, and lower mould endogenous substance material is carried out to be heated to set the first temperature；
3) mould and the second Ccope closing machine under, the length that mould can be embedded in lower mould on second is less than mould on first can be embedded into lower mould
Interior length, continues that biological material is heated to set second temperature, forms monolateral foaming on second between mould and lower mould empty
Chamber；In monolateral foaming cavity is carried out to biological material the heating setpoint time, realize that monolateral cavity bakees foaming.
10. monolateral cavity free style foaming method as claimed in claim 9, it is characterised in that mould and lower mould on described first
One of them is connected with travel mechanism in the two, makees in travel mechanism after upper mould with lower mould extruding biological material setting time
Departed from lower mould with lower upper mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610860950.0A CN106626201B (en) | 2016-09-28 | 2016-09-28 | Unilateral cavity free style foaming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610860950.0A CN106626201B (en) | 2016-09-28 | 2016-09-28 | Unilateral cavity free style foaming method |
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| Publication Number | Publication Date |
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| CN106626201A true CN106626201A (en) | 2017-05-10 |
| CN106626201B CN106626201B (en) | 2018-11-23 |
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ID=58853944
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610860950.0A Active CN106626201B (en) | 2016-09-28 | 2016-09-28 | Unilateral cavity free style foaming method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109605645A (en) * | 2018-08-10 | 2019-04-12 | 株式会社松井制作所 | Foam forming system, mold, material supply machine and foam forming method |
| CN110341110A (en) * | 2019-08-14 | 2019-10-18 | 山东大学 | A kind of biomass composite quickly mold changing and steam exhaust type seedling culture hole plate mold and formation system |
| CN111452277A (en) * | 2020-04-01 | 2020-07-28 | 陕西科隆新材料科技股份有限公司 | Forming device and process of rubber sponge barrel-shaped section bar |
| CN116021705A (en) * | 2023-03-02 | 2023-04-28 | 浙江新恒泰新材料股份有限公司 | Cooling shaping device for producing polymer supercritical foaming material |
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| CN201800184U (en) * | 2010-09-14 | 2011-04-20 | 四川省原子能研究院 | Mold suitable for preparing radiation crosslinked polypropylene |
| CN105799110A (en) * | 2016-05-10 | 2016-07-27 | 山东大学 | Integral inlaying type ventilation steel die |
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2016
- 2016-09-28 CN CN201610860950.0A patent/CN106626201B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201800184U (en) * | 2010-09-14 | 2011-04-20 | 四川省原子能研究院 | Mold suitable for preparing radiation crosslinked polypropylene |
| CN105799110A (en) * | 2016-05-10 | 2016-07-27 | 山东大学 | Integral inlaying type ventilation steel die |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109605645A (en) * | 2018-08-10 | 2019-04-12 | 株式会社松井制作所 | Foam forming system, mold, material supply machine and foam forming method |
| CN109605645B (en) * | 2018-08-10 | 2021-04-09 | 株式会社松井制作所 | Foam molding system, mold, material feeder, and foam molding method |
| CN110341110A (en) * | 2019-08-14 | 2019-10-18 | 山东大学 | A kind of biomass composite quickly mold changing and steam exhaust type seedling culture hole plate mold and formation system |
| CN111452277A (en) * | 2020-04-01 | 2020-07-28 | 陕西科隆新材料科技股份有限公司 | Forming device and process of rubber sponge barrel-shaped section bar |
| CN116021705A (en) * | 2023-03-02 | 2023-04-28 | 浙江新恒泰新材料股份有限公司 | Cooling shaping device for producing polymer supercritical foaming material |
| CN116021705B (en) * | 2023-03-02 | 2023-08-11 | 浙江新恒泰新材料股份有限公司 | Cooling shaping device for producing polymer supercritical foaming material |
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| CN106626201B (en) | 2018-11-23 |
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