CN207290875U - A kind of overcritical extrusion foaming die orifice calibrator of polypropylene - Google Patents
A kind of overcritical extrusion foaming die orifice calibrator of polypropylene Download PDFInfo
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- CN207290875U CN207290875U CN201721384949.1U CN201721384949U CN207290875U CN 207290875 U CN207290875 U CN 207290875U CN 201721384949 U CN201721384949 U CN 201721384949U CN 207290875 U CN207290875 U CN 207290875U
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- stock mould
- temperature control
- temperature
- overcritical
- calibrator
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Abstract
The utility model provides a kind of overcritical extrusion foaming die orifice calibrator of polypropylene, including stock mould and temperature control system, stock mould is hollow channel formula structure, after extrusion die, before draw-gear, temperature control system is used for the temperature for controlling stock mould, stock mould includes upper die and lower die, upper mold is embedded in the top of lower die, the lower surface of upper mold and the inner surface of lower die cooperatively form the sizing chamber of stock mould, the polypropylene expanded bar that stock mould extrudes die for extrusion molds is closely bonded into an entirety under the action of inner cavity surface of shaping, so that polypropylene expanded plastics have stable foam structure and sectional dimension, reduce foaming defect, and expansion density is reduced to a certain extent, control the thickness of extrusion foaming, it ensure that the quality of PP foam material.
Description
Technical field
It the utility model is related to extrusion die domain technology field, more particularly to a kind of overcritical extrusion foaming mould of polypropylene
Mouth calibrator.
Background technology
Polypropylene foam has the characteristics that lightweight, buffering, high-ductility, easy molding shaping, is widely used in packaging, physical culture is used
The fields such as product, automobile.But due to the linear polymer that polypropylene is partially crystallizable, its melt strength and melt drawn performance are all very
Low, cell wall is easily broken and merges in foaming process, it is difficult to obtains uniform foam cell, the high polypropylene expanded material of expansion ratio
Material, it is very crucial in the size of polypropylene expanded middle control foaming and the suitable foam structure of stability acquisition of foam structure,
Meanwhile the density of expanded material is also to influence another key factor of expanded material physical property, it impacts, stretches, bending, pressure
The mechanical properties such as contracting decline by a big margin with the reduction of density.
At present, the preparation method of polypropylene foam mainly has two kinds of extrusion molding and die pressing, and extrusion molding foaming can be realized
Consecutive production, efficiency are higher, it is easy to accomplish industrialized production, general polypropylene extrusion foaming production line at least will include with
Under several parts：Extrusion system, foaming die, shaping equipment, draw-gear and cutter device.It is terrible in extrusion foaming
To compared with high foamability, compared with the expanded material of low-density, it is necessary to effectively suppress bubble propagation process in gas loss, but send out
The diffusion coefficient of infusion at high temperature is very high, therefore, on the one hand to control the temperature of foaming die, prevent temperature is excessive from making gas
Body is escaped from head, and on the other hand, as bubble increases, cell wall is thinning, and phase counterdiffusion aggravation of the gas between bubble, makes
The possibility spread out in succession by abscess into gas increases, and the tolerance for causing to increase for bubble reduces, expanded material
Density increases and expansion ratio reduces, and the latter is heavily dependent on the structure function of shaping equipment, it can be seen that, foaming
Shaping equipment after the mouth mold also key of expanded material final molding and stable bubble hole structure, currently used sizing
Device to set the limiting device of a width on draw-gear, the limiting device be used for the material of foaming extrusion into
Row sizing, is to decontrol in short transverse, this results in foaming since the limiting device only limits the width of expanded material
Combined between material not closely there are gap, the sectional area of expanded material is uneven, so as to cause PP foam material to exist
Foam defect.
The content of the invention
To overcome problems with existing in the prior art, the common shaping equipment of polypropylene foam extrusion equipment is to lead
The limiting device of one width is set on leading-in device, which only limits the width of expanded material, in height
Degree direction is to decontrol, this is combined not closely there are gap between resulting in expanded material, and the sectional area of expanded material is uneven, from
And causing polypropylene foam to there is foaming defect, the utility model provides a kind of overcritical extrusion foaming die orifice sizing of polypropylene
Device, including stock mould and temperature control system, the stock mould are hollow channel formula structure, and the stock mould includes upper die and lower die,
The upper mold is inverted Ω types structure, and the lower die is U-shaped structure, and the upper mold is embedded in the top of lower die, upper mold
The inner surface of lower surface and lower die cooperatively forms the sizing chamber of stock mould, and the temperature control system is used for the temperature for controlling stock mould.
On this basis, the upper die and lower die are bolted, and the matching hole of upper die and lower die and bolt is spiral shell
Pit, so that upper die and lower die relative position can be adjusted, ensureing the height of stock mould sizing chamber can be adjusted, to adapt to send out
The demand of foam material different-thickness, adjustable range 0-80mm.
On this basis, the stock mould be equipped with through front and rear surfaces runner, for temperature control system to stock mould into
Trip temperature controls, and the temperature range of stock mould is 0-200 DEG C.
On this basis, the stock mould is divided into feed end and discharge end, and the oriented camber angle of feed end inner surface, inclines
The scope at angle is 15 ° -45 °, is oriented to easy to enter to material in stock mould.
On this basis, the temperature control system includes temperature control equipment and temperature control medium, the temperature control equipment control
The temperature of temperature control medium processed, the temperature control that temperature control medium carries out stock mould through the runner on stock mould.
On this basis, the temperature control equipment is oil temperature machine, and the temperature control medium is conduction oil.
On this basis, the temperature control equipment is vapor heating unit, and the temperature control medium is steam.
On this basis, the temperature control equipment is water cooling plant, and the temperature control medium is water.
Compared with prior art, the beneficial effects of the utility model are：
1st, effect of the polypropylene expanded bar that die for extrusion molds is extruded in stock mould sizing inner cavity surface is made by stock mould
An entirety is closely bonded into down, so that polypropylene expanded plastics have stable foam structure and sectional dimension, is reduced
Foam defect, and reduces expansion density to a certain extent, controls the thickness of extrusion foaming, ensure that PP foam material
Quality.
2nd, stock mould uses the upper die and lower die structure of dissection type, and upper mold is embedded in the top of lower die, is connected by screw bolts,
Facilitate the installation of stock mould, while the spacing between upper die and lower die can adjust, and adapt to different size foamed strip or foamed board
Making, accommodation is bigger, ensure PP foam material quality in the case of, improve the adaptation of stock mould,
Reduce the processing cost of PP foam material.
3rd, temperature control system passes through the inside of stock mould die body, and stock mould to carry out heat exchange using temperature control medium, so that
The temperature of stock mould die cavity surrounding is controlled, and to adapt to the demand of different blowing temperatures and foaming setting, has insulation or cold
But the effect shaped, while can slow down cell contraction with stable bubble hole structure, ensure the quality of PP foam material.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is stock mould overlooking the structure diagram；
In figure：1st, stock mould, 111, feed end, 112, discharge end, 121, upper mold, 122, lower die, 13, runner, 2, temperature control
System
Embodiment
Below in conjunction with drawings and examples, the utility model is further elaborated.It should be appreciated that this place is retouched
The specific embodiment stated only to explain the utility model, is not used to limit the utility model.
As Figure 1-Figure 2, the utility model schematically illustrates a kind of overcritical extrusion foaming die orifice of polypropylene and determines
Type device.
The utility model discloses a kind of overcritical extrusion foaming die orifice calibrator of polypropylene, as shown in Figure 1, including including fixed
Pattern 1 and temperature control system 2, stock mould 1 is located at after extrusion die, before draw-gear, for die for extrusion molds is extruded poly- third
Alkene foamed strip is shaped, and temperature control system 2 is used to be controlled the temperature of stock mould 1；Stock mould 1 is hollow for front and rear perforation
Channel-type structure, its inner cavity are rectangle, as shown in Fig. 2, stock mould 1 divides for feed end 111 and discharge end 112, stock mould 1 it is interior
The discharging open height of bottom surface and die for extrusion molds is consistent, and polypropylene expanded bar is after die for extrusion molds extrusion, by stock mould 1
Feed end 111 enter stock mould 1 inside, under the action of draw-gear below, discharged by the discharge end 112 of stock mould 1,
A type-approval process is completed, the work of inner cavity surface so that the polypropylene expanded bar of die for extrusion molds extrusion is shaped in stock mould 1
An entirety closely is bonded into lower, ensures that polypropylene expanded plastics have stable foam structure and sectional dimension, reduces
Foam defect, and reduces expansion density to a certain extent, controls the thickness of extrusion foaming, ensure that PP foam material
Quality；The medial surface of the feed end 111 of stock mould 1 has 45 ° of outside inclination angles, enters stock mould 1 to PP foam material
Inside is oriented to, and is avoided square edge from hindering expanded material to enter stock mould 1, is deposited at the feed end 111 of stock mould 1,
Stock mould 1 is split type structure, including 122 two parts of upper mold 121 and lower die, is bolted, upper mold 121 is embedded in lower die
122 top, the lower surface of upper mold 121 and the inner surface of lower die 122 coordinate the sizing chamber for constituting stock mould 1, for poly-
The sizing of propylene foamed strip, for upper mold 121 to be inverted Ω type structures, there are installation threaded hole, installation threaded hole and lower die 122 in its both sides
Coordinate, for upper mold 121 to be fixed, the position dimension for installing threaded hole is matched with lower die, and bolt is threaded through the spiral shell of upper mold 121
Pit is screwed in lower die 122, upper mold 121 is fixed on to the top of lower die 122,121 bottom of upper mold is provided through front and rear surfaces
Runner 13, by the temperature control medium with certain temperature in runner 13, temperature control medium brings certain heat, so as to fulfill to upper
The temperature control of 121 bottom of mould, the feed end of 121 bottom surface of upper mold has 45 ° of chamfering, easy to be oriented to material；Lower die
122 are located at the lower part of upper mold 121, and into U-shaped structure, the width of its inner side is more than the width of 121 exterior lateral sides of upper mold, from
And upper mold 121 is embedded in top, the upper surface of lower die 122U fonts is provided with the threaded hole of installation upper mold 121,121 He of upper mold
Lower die 122 and the matching hole of bolt are threaded hole, so that upper mold 121 and 122 relative position of lower die can be adjusted, it is fixed to ensure
The height of the sizing chamber of pattern 1 can be adjusted, adjustable range 0-80mm, to adapt to the need of PP foam material different-thickness
Ask, in the case where ensureing the quality of PP foam material, improve the adaptation of stock mould 1, reduce polypropylene expanded material
There are the runner 13 through front and rear surfaces in the processing cost of material, the side and bottom of lower die 122, and runner 13 is interior by with a constant temperature
The temperature control medium of degree, temperature control medium bring certain heat, so as to fulfill the side to lower die 122 and the temperature control of bottom, under
The runner 13 of mould 122 coordinates the temperature control for realizing chamber surrounding of shaping to stock mould 1 with the runner 13 of upper mold 121, to adapt to
Different blowing temperatures and the demand of foaming setting；Temperature control system 2 includes temperature control equipment and temperature control medium, temperature control equipment
The temperature of temperature control medium is controlled, temperature control medium enters stock mould 1 by the runner 13 on stock mould 1 from one end of stock mould 1
Inside, then flows out from the other end, and temperature control medium has certain temperature, and temperature control medium is during by runner 13, and determines
Heat exchange occurs for pattern 1, so as to take away or bring certain heat, realizes the temperature control to stock mould 1, the temperature of stock mould 1
It is 0-200 DEG C to spend scope, and in the present embodiment, temperature control equipment is oil temperature machine, and temperature control medium is conduction oil, and conduction oil is in oil temperature
Flowed between machine and stock mould 1, it is achieved thereby that temperature control of the oil temperature machine to conduction oil, and then realize temperature control system 2 to fixed
The temperature control of pattern 1, to adapt to the demand of blowing temperature and foaming setting, while has expanded material the effect of insulation,
Stable bubble hole structure, slows down cell contraction, ensures the quality of PP foam material.
Installation method：
First the lower die 122 of stock mould 1 is fixed, according to the thickness requirements of PP foam material, determines that stock mould 1 is fixed
The height of cavity, it is then determined that the gap between stock mould upper mold 121 and lower die 122, is then placed on lower die by upper mold 121
122 tops, ensure the gap between 1 upper mold 121 of stock mould and lower die 122 with gasket, then by bolt from stock mould upper mold 121
Top screw in upper mold 121, bolt is pierced by the lower part of upper mold 121, is screwed in by one section of gap in lower die 122, passes through scale
Confirm whether the shape height of chamber of stock mould 1 meets with regard to demand, will installation is complete by the height of adjusting bolt come alignment error
Stock mould 1 be installed in rack, the inner bottom surface and the discharging open height of die for extrusion molds for ensureing stock mould 1 are consistent, so
Temperature control system 2 is connected afterwards, is adjusted the temperature of temperature control system 2, it is met production requirement.
Embodiment 2
As different from Example 1, the overcritical extrusion foaming die orifice calibrator of a kind of polypropylene of present embodiment, its temperature
Degree control device is vapor heating unit, and temperature control medium is vapor.
Embodiment 3
As different from Example 1, the overcritical extrusion foaming die orifice calibrator of a kind of polypropylene of present embodiment, its temperature
Degree control device is water cooling plant, and temperature control medium is water, and water flows between water cooling plant and stock mould 1, it is achieved thereby that water
Device for cooling realizes cooling control of the temperature control system to stock mould 1 to the temperature control of water, has cooling to expanded material
Effect, stable bubble hole structure, slows down cell contraction, ensures the quality of PP foam material.
The preferred embodiment of the utility model has shown and described in described above, as previously described, it should be understood that this practicality is new
Type is not limited to form disclosed herein, is not to be taken as the exclusion to other embodiment, and available for various other groups
Close, modification and environment, and by the technology of above-mentioned teaching or association area or can know in the scope of the invention is set forth herein
Knowledge is modified.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, then all should
In the protection domain of the appended claims for the utility model.
Claims (8)
- A kind of 1. overcritical extrusion foaming die orifice calibrator of polypropylene, it is characterised in that:Including stock mould (1) and temperature control system (2), the stock mould (1) is hollow channel formula structure, and the stock mould (1) includes upper mold (121) and lower die (122), described Upper mold (121) is inverted Ω types structure, and the lower die (122) is U-shaped structure, and the upper mold (121) is embedded in lower die (122) top, the lower surface of upper mold (121) and the inner surface of lower die (122) cooperatively form the sizing chamber of stock mould (1), institute State the temperature that temperature control system (2) is used to control stock mould (1).
- A kind of 2. overcritical extrusion foaming die orifice calibrator of polypropylene according to claim 1, it is characterised in that：On described Mould (121) and lower die (122) are bolted, and upper mold (121) and lower die (122) and the matching hole of bolt are threaded hole, So that upper mold (121) and lower die (122) relative position can be adjusted, ensureing the height of stock mould (1) sizing chamber can be adjusted, To adapt to the demand of expanded material different-thickness, adjustable range 0-80mm.
- A kind of 3. overcritical extrusion foaming die orifice calibrator of polypropylene according to claim 2, it is characterised in that：It is described fixed Pattern (1) is equipped with the runner (13) through front and rear surfaces, and temperature control is carried out to stock mould (1) for temperature control system (2), fixed The temperature range of pattern (1) is 0-200 DEG C.
- A kind of 4. overcritical extrusion foaming die orifice calibrator of polypropylene according to claim 3, it is characterised in that：It is described fixed Pattern (1) is divided into feed end (111) and discharge end (112), the oriented camber angle of feed end (111) inner surface, the model at inclination angle Enclose for 15 ° -45 °, be oriented to easy to enter to material in stock mould (1).
- A kind of 5. overcritical extrusion foaming die orifice calibrator of polypropylene according to claim 4, it is characterised in that：The temperature Control system (2) includes temperature control equipment and temperature control medium, the temperature of the temperature control equipment control temperature control medium, and temperature control is situated between The temperature control that matter carries out stock mould (1) through the runner (13) on stock mould (1).
- A kind of 6. overcritical extrusion foaming die orifice calibrator of polypropylene according to claim 5, it is characterised in that：The temperature It is oil temperature machine to spend control device, and the temperature control medium is conduction oil.
- A kind of 7. overcritical extrusion foaming die orifice calibrator of polypropylene according to claim 5, it is characterised in that：The temperature It is vapor heating unit to spend control device, and the temperature control medium is steam.
- A kind of 8. overcritical extrusion foaming die orifice calibrator of polypropylene according to claim 5, it is characterised in that：The temperature It is water cooling plant to spend control device, and the temperature control medium is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721384949.1U CN207290875U (en) | 2017-10-25 | 2017-10-25 | A kind of overcritical extrusion foaming die orifice calibrator of polypropylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721384949.1U CN207290875U (en) | 2017-10-25 | 2017-10-25 | A kind of overcritical extrusion foaming die orifice calibrator of polypropylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207290875U true CN207290875U (en) | 2018-05-01 |
Family
ID=62273858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721384949.1U Active CN207290875U (en) | 2017-10-25 | 2017-10-25 | A kind of overcritical extrusion foaming die orifice calibrator of polypropylene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207290875U (en) |
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2017
- 2017-10-25 CN CN201721384949.1U patent/CN207290875U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 508 Longjin Road, Changzhou City, Jiangsu Province, 213017 Patentee after: Changzhou Tiansheng New Materials Group Co.,Ltd. Address before: No. 508 Longjin Road, Changzhou City, Jiangsu Province, 213028 Patentee before: CHANGZHOU TIANSHENG NEW MATERIALS Co.,Ltd. |
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| CP03 | Change of name, title or address |