CN108437338A - A kind of supercritical fluid foaming mould and its application method - Google Patents
A kind of supercritical fluid foaming mould and its application method Download PDFInfo
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- CN108437338A CN108437338A CN201810182128.2A CN201810182128A CN108437338A CN 108437338 A CN108437338 A CN 108437338A CN 201810182128 A CN201810182128 A CN 201810182128A CN 108437338 A CN108437338 A CN 108437338A
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- Prior art keywords
- supercritical fluid
- upper mold
- lower die
- protector
- die
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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
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
-
- 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
-
- 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
- B29C44/60—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/768—Protective equipment
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of supercritical fluid foaming moulds, it is characterized in that, it include the die ontology for producing supercritical fluid fretting map protector, the die ontology is divided into upper mold and lower die two parts, upper mold can be separated from each other with lower die, also it can be closed to form an entirety, when upper mold and lower die are closed, space is formed between upper mold and lower die, the reserved hole post for forming connecting hole on supercritical fluid fretting map protector is equipped in space of the supercritical fluid fretting map protector between upper mold and lower die, in the die ontology.The present invention has installed stainless steel column additional in supercritical fluid foaming mould, in high polymer foaming process, position where stainless steel column can form hole, made protector edge can form equally distributed hole, protector can be reinforced when preparing protective garment by way of with line or cloth perforation, protector stability is good, but also can easily dismount；In addition, mold according to the present invention is easy to process, it is easy to utilize.
Description
Technical field
It is overcritical especially suitable for discrete the present invention relates to a kind of supercritical fluid foaming mould and its application method
Fluid fretting map protective gear material.
Background technology
Supercritical fluid is that have more than critical-temperature and critical pressure, the fluid between gas and liquid
Many unique properties, such as viscosity, density, diffusion coefficient, solvability property are very sensitive with temperature and pressure variation,
Micro-foaming material can be prepared using the characteristic by changing temperature or pressure.Early in the 1950s this method be just commercialized
Applied to low density polyethylene (LDPE) is prepared, it has been widely used in the high polymers such as polyvinyl chloride, polystyrene, polyester at present, it is prepared
Micro-foaming material have many advantages, such as that density is small, intensity is high, be suitable for make human body protective gear material；But it is taken comfortably to improve
Property reduces cost, high polymer micro-foaming material need to be made to protector component, such as ancon, knee protector component, this is related to
The fixation of component, with the connection of fabric the problems such as, at present frequently with method be to wrap up protector with fabric, it is complicated for operation, it is time-consuming
Arduously.The present invention provides a kind of preparation method of supercritical fluid fretting map mold, and the mold developed copies human body easy damaged
The shape at position, and it has been specifically designed reserved pore structure, made protector component has connecting hole, is convenient for following process.
Invention content
The purpose of the present invention is to provide a kind of supercritical fluid foaming mould and its preparation and application, existing to solve
There are fixation and the connectivity problem of the protector component prepared by mold.The present invention installs additional on the basis of traditional dies and reserves hole post, make
Obtaining made protector component has connecting hole, is convenient for following process.
In order to achieve the above object, the present invention provides a kind of supercritical fluid foaming moulds, which is characterized in that including with
In the die ontology of production supercritical fluid fretting map protector, the die ontology is divided into upper mold and lower die two parts, upper mold
It can be separated from each other with lower die, can also be closed to form an entirety, when upper mold and lower die closure, shape between upper mold and lower die
At there is a space, in space of the supercritical fluid fretting map protector between upper mold and lower die, it is equipped in the die ontology
Reserved hole post for forming connecting hole on supercritical fluid fretting map protector.
Preferably, the supercritical fluid fretting map protector is the protector for human body ancon or knee.
Preferably, the reserved hole post is distributed in die ontology according to certain rules.
Preferably, the upper mold includes top plate and the protrusion part on top plate or sunk part, under described
Mould, which includes bottom plate and the sunk part on bottom plate or protrusion part, protrusion part, can be set to the recess
In part, the space is formed between protrusion part and sunk part, and preformed hole is equipped on the top plate and bottom plate
Column, reserve hole post be cylinder, direction is vertical with upper-mould top or lower mould bottom plate, reserve hole post one end be fixed on upper mold or
The protrusion part of lower die or sunk part, the other end is smooth, and the reserved hole post of corresponding position reaches when upper and lower mould being made to be closed
It is good in sealing contact.
Further, the reserved hole post is stainless steel column.
Further, the minimum range d1 between the fixing end and sunk part edge of the reserved hole post of the lower die is
5-10mm, the distance between adjacent stainless steel column d2 are 10-50mm, a diameter of 1-10mm of stainless steel column.
Further, the height of the reserved hole post is different according to the distributing position in mould so that upper die and lower die close
The reserved hole post of corresponding position can be combined into one when conjunction.
Preferably, the upper die and lower die and reserved hole post are all made of 1Cr18Ni9Ti stainless steels or 321 stainless steels
At.
Preferably, the upper mold is equipped with rubber washer with lower die engagement edge, and upper mold uses screw bolt and nut with lower die
It is fastenedly connected.
Further, the rubber washer is resistant to 150 DEG C of -300 DEG C of high temperature.
Preferably, the upper mold is equipped with snorkel, is connect with supercritical fluid.
Preferably, the supercritical fluid is supercritical CO2。
The present invention also provides the application methods of above-mentioned supercritical fluid foaming mould, which is characterized in that including：
The first step：Releasing agent is evenly coated in die ontology inner surface and reserved hole post surface；
Second step：High polymer is uniformly put into die ontology, upper and lower mould is closed；
Third walks：Die ontology is put into autoclave, kettle cover is installed；
4th step：Supercritical fluid is filled with into die ontology, mold is warming up to 170-220 DEG C, heating rate 30-50
DEG C/min, 10-30min is kept the temperature after reaching predetermined temperature, then temperature is reduced to 100-120 DEG C rapidly, rate of temperature fall 25-60
DEG C/min, and the pressure in abrupt release mold；High polymer expands rapidly, and mold is opened after standing 20-60min, obtains super face
Boundary's fluid fretting map protector；
5th step：Mold clean is clean, next use is waited for after drying.
Preferably, the releasing agent is high viscous silicone plastics releasing agent or high temperature resistant polyurethane releasing agent.
Preferably, the volume ratio in the space in the second step between high polymer and upper mold and lower die is 2: 1-20: 1.
Compared with prior art, the beneficial effects of the invention are as follows：
Stainless steel column has been installed additional in the supercritical fluid foaming mould of the present invention, in high polymer foaming process, stainless steel
Position where column can form hole, and made protector edge can form equally distributed hole, can lead to when preparing protective garment
It crosses and reinforces protector with the mode of line or cloth perforation, protector stability is good, but also can easily dismount；In addition, this hair
Bright involved mold is easy to process, easy to utilize.
Description of the drawings
Fig. 1 is entirety shape appearance figure when mold is closed；
Entirety shape appearance figure when Fig. 2 is mold separation；
Fig. 3 a and 3b are respectively the front view and vertical view of lower die；
Fig. 4 a and Fig. 4 b are the front view and upward view of upper mold.
Specific implementation mode
Present invention will be further explained below with reference to specific examples.321 stainless steels used in following embodiment are Shanghai
Million stainless steel Co., Ltd of Lu produces；TPS produces for DuPont Corporation, model TPS 2702；TPU is Bayer A.G
Production, model RXT65D；Releasing agent uses MS-606 type polyurethane releasing agents, is purchased from Wuxi De Fan trade Co., Ltds.
Embodiment 1
As depicted in figs. 1 and 2, supercritical fluid foaming mould of the invention, including it is used to produce the micro- hair of supercritical fluid
The die ontology of protector is steeped, the die ontology is divided into upper mold 1 and 2 two parts of lower die, and upper mold 1 can mutually be divided with lower die 2
From, it can also be closed to form an entirety, when upper mold 1 and the closure of lower die 2, space is formed between upper mold 1 and lower die 2, it is super
It is equipped in space of the critical fluids fretting map protector between upper mold 1 and lower die 2, in the die ontology for facing super
The reserved hole post 3 of connecting hole is formed on boundary's fluid fretting map protector.
The supercritical fluid fretting map protector is the protector for being used to prepare human body ancon.The reserved hole post 3 is pressed
Certain rule is distributed in die ontology.The upper mold 1 includes top plate and the protrusion part on top plate, under described
Mould includes bottom plate and the sunk part on bottom plate, and protrusion part can be set in the sunk part, institute
The space stated is formed between protrusion part and sunk part, and reserved hole post 3, preformed hole are equipped on the top plate and bottom plate
Column 3 is cylinder, and direction is vertical with upper-mould top or lower mould bottom plate, and upper mold or lower die are fixed in the one end for reserving hole post 3
On protrusion part or sunk part, the other end is smooth, and the reserved hole post 3 of corresponding position reaches when upper mold 1 being made to be closed with lower die 2
To good in sealing contact.As shown in Fig. 3 a and 4b, the fixing end of the reserved hole post of the lower die and sunk part edge it
Between minimum range d1 (namely connecting hole with protect marginate distance) be 5mm, as shown in Fig. 3 b and 4a, adjacent stainless steel column it
Between distance d2 be 30mm, a diameter of 5mm of stainless steel column.The height of the reserved hole post 3 is according to the distributing position in mould
It is and different so that the reserved hole post of corresponding position can be combined into one when upper and lower mould is closed.
Upper mold 1, lower die 2 and the reserved hole post 3 is all made of 321 stainless steels and is made.The upper mold 1 connects with lower die 2
It touches edge and is equipped with rubber washer, upper mold 1 is fastenedly connected with lower die 2 using screw bolt and nut.The rubber washer is resistant to 250 DEG C
High temperature.Upper mold 1 is equipped with snorkel, with overcritical C02It fluidly connects.
Use above-mentioned supercritical fluid foaming mould prepare the method for human body elbow protecting tool material for：
The first step：Releasing agent is evenly coated in 3 surface of upper mold 1,2 inner surface of lower die and reserved hole post；
Second step：Thermoplastic elastic material TPS is uniformly put into the space in die ontology between upper mold and lower die,
Snorkel is connected, rubber washer is adjusted, upper and lower mould is closed, tightens bolt；Space between high polymer and upper mold and lower die
Volume ratio be 10：1.
Third walks：Die ontology is put into autoclave, kettle cover is installed；
4th step：Snorkel to be opened, supercritical fluid is filled with, mold is warming up to 200 DEG C, and heating rate is 40 DEG C/min,
Reach and keep the temperature 20min after predetermined temperature, then temperature is reduced to 110 DEG C rapidly, rate of temperature fall is 50 DEG C/min, and abrupt release
Pressure in mold；High polymer expands rapidly, stands volume stability after 30min, obtains supercritical fluid fretting map protector.
5th step：Mold clean is clean, next use is waited for after drying.
Human body elbow protecting tool material prepared by supercritical fluid foaming mould using the present invention, density 48kg/
m3, tensile strength 2.5MPa, compressive strength 0.88MPa.
Embodiment 2
As depicted in figs. 1 and 2, supercritical fluid foaming mould of the invention, including it is used to produce the micro- hair of supercritical fluid
The die ontology of protector is steeped, the die ontology is divided into upper mold 1 and 2 two parts of lower die, and upper mold 1 can mutually be divided with lower die 2
From, it can also be closed to form an entirety, when upper mold 1 and the closure of lower die 2, space is formed between upper mold 1 and lower die 2, it is super
It is equipped in space of the critical fluids fretting map protector between upper mold 1 and lower die 2, in the die ontology for facing super
The reserved hole post 3 of connecting hole is formed on boundary's fluid fretting map protector.
The supercritical fluid fretting map protector is the protector for being used to prepare human knee.The reserved hole post 3 is pressed
Certain rule is distributed in die ontology.The upper mold 1 includes top plate and the protrusion part on top plate, under described
Mould includes bottom plate and the sunk part on bottom plate, and protrusion part can be set in the sunk part, institute
The space stated is formed between protrusion part and sunk part, and reserved hole post 3, preformed hole are equipped on the top plate and bottom plate
Column 3 is cylinder, and direction is vertical with upper-mould top or lower mould bottom plate, and upper mold or lower die are fixed in the one end for reserving hole post 3
On protrusion part or sunk part, the other end is smooth, and the reserved hole post 3 of corresponding position reaches when upper mold 1 being made to be closed with lower die 2
To good in sealing contact.
As shown in Fig. 3 a and 4b, the most narrow spacing between the fixing end and sunk part edge of the reserved hole post of the lower die
It is 10mm from d1, as shown in Fig. 3 b and 4a, the distance between adjacent stainless steel column d2 is 50mm, a diameter of 8mm of stainless steel column.
The height of the reserved hole post 3 is different according to the distributing position in mould so that corresponding position is reserved when upper and lower mould is closed
Hole post can be combined into one.
Upper mold 1, lower die 2 and the reserved hole post 3 is all made of 321 stainless steels and is made.The upper mold 1 connects with lower die 2
It touches edge and is equipped with rubber washer, upper mold 1 is fastenedly connected with lower die 2 using screw bolt and nut.The rubber washer is resistant to 250 DEG C
High temperature.Upper mold 1 is equipped with snorkel, with supercritical CO2It fluidly connects.
Use above-mentioned supercritical fluid foaming mould prepare the method for human knee's protective gear material for：
The first step：Releasing agent is evenly coated in 3 surface of upper mold 1,2 inner surface of lower die and reserved hole post；
Second step：Thermoplastic elastic material TPU is uniformly put into the space in die ontology between upper mold and lower die,
Snorkel is connected, rubber washer is adjusted, upper and lower mould is closed, tightens bolt；Space between high polymer and upper mold and lower die
Volume ratio be 10: 1.
Third walks：Die ontology is put into autoclave, kettle cover is installed；
4th step：Snorkel to be opened, supercritical fluid is filled with, mold is warming up to 200 DEG C, and heating rate is 40 DEG C/min,
Reach and keep the temperature 20min after predetermined temperature, then temperature is reduced to 120 DEG C rapidly, rate of temperature fall is 50 DEG C/min, and abrupt release
Pressure in mold；High polymer expands rapidly, stands volume stability after 30min, obtains supercritical fluid fretting map protector.
5th step：Mold clean is clean, next use is waited for after drying.
Human body elbow protecting tool material prepared by supercritical fluid foaming mould using the present invention, density 50kg/
m3, tensile strength 2.4MPa, compressive strength 0.92MPa.
Claims (10)
1. a kind of supercritical fluid foaming mould, which is characterized in that include the mould for producing supercritical fluid fretting map protector
Has ontology, the die ontology is divided into upper mold and lower die two parts, and upper mold can be separated from each other with lower die, also being capable of closed
Space, supercritical fluid fretting map protector position are formed between upper mold and lower die when upper mold and lower die closure at an entirety
In space between upper mold and lower die, it is equipped in the die ontology for being formed on supercritical fluid fretting map protector
The reserved hole post of connecting hole.
2. supercritical fluid foaming mould as described in claim 1, which is characterized in that the supercritical fluid fretting map shield
Tool is the protector for being used to prepare human body ancon or knee.
3. supercritical fluid foaming mould as described in claim 1, which is characterized in that the upper mold includes top plate and sets
In on top plate protrusion part or sunk part, the lower die include bottom plate and the sunk part on bottom plate or protrusion
Part, protrusion part can be set in the sunk part, and the space is formed in protrusion part and recessed portion
/, be equipped with reserved hole post on the top plate and bottom plate, it is cylinder to reserve hole post, direction and upper-mould top or under
Baffle plate is vertical, and one end of reserved hole post is fixed on protrusion part or the sunk part of upper mold or lower die, and the other end is smooth flat
Whole, the reserved hole post of corresponding position reaches good in sealing contact when upper and lower mould being made to be closed.
4. supercritical fluid foaming mould as claimed in claim 3, which is characterized in that the upper die and lower die and preformed hole
Column is all made of 1Cr18Ni9Ti stainless steels or 321 stainless steels are made.
5. supercritical fluid foaming mould as claimed in claim 3, which is characterized in that the upper mold and lower die engagement edge
Equipped with rubber washer, upper mold is fastenedly connected with lower die using screw bolt and nut.
6. supercritical fluid foaming mould as described in claim 1, which is characterized in that the upper mold is equipped with snorkel, with
Supercritical fluid connects.
7. supercritical fluid foaming mould as claimed in claim 6, which is characterized in that the supercritical fluid is overcritical
CO2。
8. the application method of the supercritical fluid foaming mould described in any one of claim 1-7, which is characterized in that including：
The first step：Releasing agent is evenly coated in die ontology inner surface and reserved hole post surface；
Second step：High polymer is uniformly put into die ontology, upper and lower mould is closed；
Third walks：Die ontology is put into autoclave, kettle cover is installed；
4th step：It is filled with supercritical fluid into die ontology, mold is warming up to 170-220 DEG C, and heating rate is 30-50 DEG C/
Min reaches and keeps the temperature 10-30min after predetermined temperature, then temperature is reduced to 100-120 DEG C rapidly, and rate of temperature fall is 25-60 DEG C/
Min, and the pressure in abrupt release mold；High polymer expands rapidly, opens mold after standing 20-60min, obtains shooting flow
Body fretting map protector；
5th step：Mold clean is clean, next use is waited for after drying.
9. the application method of supercritical fluid foaming mould as claimed in claim 8, which is characterized in that the releasing agent is
The viscous silicone plastics releasing agent of height or high temperature resistant polyurethane releasing agent.
10. the application method of supercritical fluid foaming mould as claimed in claim 8, which is characterized in that the second step
The volume ratio in the space between middle high polymer and upper mold and lower die is 2: 1-20: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182128.2A CN108437338A (en) | 2018-03-06 | 2018-03-06 | A kind of supercritical fluid foaming mould and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182128.2A CN108437338A (en) | 2018-03-06 | 2018-03-06 | A kind of supercritical fluid foaming mould and its application method |
Publications (1)
| Publication Number | Publication Date |
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| CN108437338A true CN108437338A (en) | 2018-08-24 |
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ID=63193673
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810182128.2A Pending CN108437338A (en) | 2018-03-06 | 2018-03-06 | A kind of supercritical fluid foaming mould and its application method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872441A (en) * | 2018-08-30 | 2020-03-10 | 嘉兴未来新材料科技有限公司 | Preparation method of foam material for bra |
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| US20060099298A1 (en) * | 2004-11-05 | 2006-05-11 | Hayes Michael S | Mold flash trap, process using and parts made thereby |
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Application publication date: 20180824 |