CN104943122B - Gas auxiliary mouth die assembly - Google Patents
Gas auxiliary mouth die assembly Download PDFInfo
- Publication number
- CN104943122B CN104943122B CN201510221508.9A CN201510221508A CN104943122B CN 104943122 B CN104943122 B CN 104943122B CN 201510221508 A CN201510221508 A CN 201510221508A CN 104943122 B CN104943122 B CN 104943122B
- Authority
- CN
- China
- Prior art keywords
- flow
- air chamber
- path tube
- gas
- secondary segment
- 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.)
- Expired - Fee Related
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Classifications
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
- B29C48/147—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle
- B29C48/1472—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle at the die nozzle exit zone
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
nullA kind of extruder gas auxiliary mouth die assembly of improvement，It depletion of QI secondary segment including coaxially being arranged in order setting、Air chamber section and gas secondary segment，Integrated on described depletion of QI secondary segment it is provided with a flow-path tube，On described depletion of QI secondary segment, the opposite side of corresponding described flow-path tube offers flow channel entry point，It is positioned at centre in described air chamber section and offers flow-path tube jack and air chamber the most successively，The pore of air chamber described in radial communication and outer axial face it is further opened with in described air chamber section，The corresponding described flow-path tube of described gas secondary segment offers hole, gas secondary flow road，The length of described flow-path tube is more than the length of described air chamber section、Length sum less than described air chamber section Yu described gas secondary segment，The other end that described flow-path tube is corresponding with described depletion of QI secondary segment is inserted in hole, described gas secondary flow road through described flow-path tube jack and air chamber，It is reserved with air cushion between radial direction surrounding and the surrounding hole wall in hole, described gas secondary flow road of described flow-path tube and forms gap.
Description
Technical field
The present invention relates to polymeric molds field, particularly relate to the gas auxiliary mouth die group of the polymer extruder of a kind of improvement
Part.
Background technology
The extruded product of polymeric material needs to be moulded by molten polymer material by extruder in producing forming process
Being melted into uniform melt, finally by mouth die discharging, form product, mouth die is steelwork, and steel coefficient of friction is big, high temperature polymerization
Produce the friction of adhesion when thing melt passes through the polymer flow passage of mouth die between meeting and the wall of mouth die, and then extrusion product can be affected
The Forming Quality of product, adds energy consumption simultaneously.
For above-mentioned situation, tradition mouth die is improved by people based on traditional extruder, proposes a kind of gas auxiliary
Extrusion technology, is injected into high-temperature gas in mouth die by control, forms one layer between mouth die inwall and polymer melt
Between very thin air cushion layer, it is achieved adhesion non-slip shift to non-adhesive complete sliding extrusion transformation.And These gases auxiliary extrusion
The key core of forming technique is the design of the auxiliary mouth die of gas, and the most conventional mode has two kinds, particularly as follows:
One, clearance type intake method, which mesohigh high-temperature gas have just enter into airintake direction in polymer flow passage with
Polymer melt flow direction in mouth die is vertical, and the auxiliary mouth die of this gas is primarily present following problem:
(1) during gas-assisted extrusion, if first allowing polymer melt pass through mouth die, rear gas passes through mouth
Mould, can block at mouth die air inlet gap, polymer melt blowout herein can need to be melted at polymer just now with gases at high pressure
Body and mouth die wall form air cushion layer, therefore increase complexity in gas pressure regulation；
(2) after completing gas-assisted extrusion, the most first being closed by gas, the rear extruder cohering compound that stops melts
Body, can make to have at mouth die air inlet gap and at mouth die air chamber many polymer melts, once time length can ramming material solidification,
It is difficult to utilize gases at high pressure to be blown off by polymer melt during gas-assisted extrusion next time, thus affects stablizing of air cushion layer
Property, mould need to be disassembled when ramming material melts completely and the polymer melt of the inside is removed, reduce work efficiency；
(3) this mode mouth die is only applied to polymer melt and extrudes straight down, once in (and the polymerization of level extrusion
Thing extrusion molding production industry is extruded in the majority with level), therefore the impact of polymer melt gravity promotes air cushion layer the latter half
It is not easily formed, thus causes this process failure；
Two, hole intake method, which existing problems are as follows:
(1) the easy putty of hole, very difficult removing, and then destroy the formation of air cushion layer, to such an extent as to this mouth die can be used only in viscous
Spend the highest polymer melt extrusion；
(2) in mouth die, whole air cushion interval pressure is consistent, and the pressure that polymer melt is in this region is gradually to subtract
Little, so reduce owing to pressure imbalance is easily caused extrudate surface quality.
Although above two existing gas auxiliary mouth die can overcome traditional extrusion neck ring mold during specifically used
Sticking friction is produced between polymer melt and the polymer flow passage of mouth die, but owing to the gas of High Temperature High Pressure melts with polymer
Airintake direction when body just contacts is mutually perpendicular to polymer melt extrusion direction, therefore easily affects polymer product quality and have an effect on
Stability during air-assist extrusion, and then have very much necessity of further Improvement.
Summary of the invention
The present invention provides the extruder gas auxiliary mouth die assembly of a kind of improvement, and its technical problem underlying to be solved is: existing
The auxiliary mouth die of some gas is when extrusion molding polymeric articles, and when two kinds of fluids just contact, high-temperature gas flows to and polymer melt
Extrusion direction is vertical, and then affects the quality of extruded product and the stability of extrusion.
For the deficiencies in the prior art, the present invention provides a kind of gas auxiliary mouth die assembly, and it includes coaxially being arranged in order setting
Depletion of QI secondary segment, air chamber section and gas secondary segment, on described depletion of QI secondary segment corresponding described air chamber section side centre one become
Type be provided with a flow-path tube, described flow-path tube is coaxial with described depletion of QI secondary segment, corresponding described flow-path tube on described depletion of QI secondary segment
Opposite side offers the flow channel entry point connected with described flow-path tube, described air chamber section is positioned at centre and offers the most successively
Flow-path tube jack and air chamber, described flow-path tube jack matches with described flow-path tube, described flow-path tube jack and described gas
Chamber connects and axially penetrates through described air chamber section, and described air chamber section is further opened with air chamber described in radial communication and outer axial face
Pore, the corresponding described flow-path tube of described gas secondary segment offers hole, gas secondary flow road, and the length of described flow-path tube is more than described air chamber section
Length, less than the length sum of described air chamber section Yu described gas secondary segment, another corresponding with described depletion of QI secondary segment of described flow-path tube
One end is inserted in hole, described gas secondary flow road through described flow-path tube jack and air chamber, the radial direction surrounding of described flow-path tube with
It is reserved with air cushion between the surrounding hole wall in hole, described gas secondary flow road and forms gap.
Be preferable over: described depletion of QI secondary segment, air chamber section and gas secondary segment all in cylindrical shape, described depletion of QI secondary segment, air chamber section
And seal against between the adjacent axial end of gas secondary segment, axle respectively on described depletion of QI secondary segment, air chamber section and gas secondary segment
At least two dowel hole is offered to corresponding, the most corresponding respectively on described depletion of QI secondary segment, air chamber section and gas secondary segment
Offer at least three bolt mounting holes, described dowel hole and bolt mounting holes all stagger described pore.
It is preferable over: described flow channel entry point is coniform, and the conical top in cone shape described flow channel entry point is with described
Flow-path tube is corresponding, and described depletion of QI secondary segment and flow-path tube form a funnel-shaped structure.
It is preferable over: the central axis level of the center the most described gas secondary segment in hole, described gas secondary flow road is deflected downwardly.
It is preferable over: described flow-path tube is than described air chamber segment length 5mm.
It is preferable over: the central axis level of the center the most described gas secondary segment in hole, described gas secondary flow road is deflected downwardly
0.25mm。
The present invention in the specific implementation, passes through in dowel hole between described depletion of QI secondary segment, air chamber section and gas secondary segment
Insert shop bolt and realize relative localization, by installing bolt through bolt mounting holes by auxiliary to depletion of QI secondary segment, air chamber section and gas
Section is horizontally arranged at the head exit of extruder, and between depletion of QI secondary segment, air chamber section and gas secondary segment, adjacent axial end exists
Installing to be in close contact under the squeezing action of bolt and realize sealing, the polymer melt of extruder level extrusion is auxiliary by described depletion of QI
The flow channel entry point of section enters in the flow-path tube of horizontal positioned, polymer melt through described flow-path tube to deliver into described gas auxiliary
In runner hole, meanwhile, can be from described pore to the gas being filled with High Temperature High Pressure described air chamber, the gas of High Temperature High Pressure
Formed gap by described air chamber through described air cushion on the hole wall in hole, gas secondary flow road, form the flow direction and the polymer melt flow direction
Identical air cushion；When installing described gas secondary segment, the central axis level of hole, described gas secondary flow road the most described gas secondary segment is downward
Deviation.
Compared with prior art, the invention has the beneficial effects as follows:
1, achieve polymer melt and the melt of high-temperature gas intersection flow to consistent with gas flow level rather than
Original is mutually perpendicular to, hence in so that the radial direction surrounding of polymer melt extrudate all can form uniform air cushion, improves crowded
Go out material amount, improve air-assist extrusion process stability；
2, the flow-path tube of depletion of QI secondary segment is longer than air chamber section and inserts in hole, gas secondary flow road, owing to polymer melt was being extruded
Because of the effect of inertia force in journey, polymer melt flows in opposite direction with air cushion formation clearance opening, the most effectively inhibits
Polymer melt produces the polymer melt phenomenon along pore adverse current when high-temperature gas stops air inlet；
3, during new extruded product, because the gravity in view of polymer melt affects, so making gas secondary flow road
The center in hole is deflected downwardly the headspace adding air cushion layer lower half relative to the central axis level of gas secondary segment, it is suppressed that under
Half air cushion layer blocks phenomenon.
Accompanying drawing explanation
Fig. 1 is the overall structure cross-sectional schematic of the present invention.
Fig. 2 is the sectional structure decomposing schematic representation of Fig. 1.
Fig. 3 is the stereo decomposing structural representation of the present invention.
Fig. 4 is another angle schematic diagram of Fig. 3.
Fig. 5 is gas secondary segment end face structure schematic diagram.
Detailed description of the invention
A kind of gas auxiliary mouth die assembly proposed the present invention below with reference to accompanying drawing 1 to 5 and preferred embodiment is made more
Describe in detail.
Embodiment one: the present invention provides a kind of gas auxiliary mouth die assembly, it depletion of QI secondary segment including coaxially being arranged in order setting
1, air chamber section 2 and gas secondary segment 3, on described depletion of QI secondary segment 1, the centre of corresponding described air chamber section 2 side is integrated sets
Having a flow-path tube 11, described flow-path tube 11 is coaxial with described depletion of QI secondary segment 1, corresponding described flow-path tube 11 on described depletion of QI secondary segment 1
Opposite side offer the flow channel entry point 12 connected with described flow-path tube 11, described air chamber section 2 is positioned at centre and axially depends on
Secondary flow-path tube jack 21 and the air chamber 22 of offering, described flow-path tube jack 21 matches with described flow-path tube 11, described stream
Deferent jack 21 connects with described air chamber 22 and axially penetrates through described air chamber section 2, described air chamber section 2 is further opened with radially connect
Logical described air chamber 22 and the pore 23 of outer axial face, one end of the corresponding outer axial face of described pore 23 offers for grafting high temperature defeated
The connection female thread of snorkel, the corresponding described flow-path tube 11 of described gas secondary segment 3 offers hole, gas secondary flow road 31, described flow-path tube 11
The length length more than described air chamber section 2, the length sum less than described air chamber section 2 with described gas secondary segment 3, described flow-path tube
11 other ends corresponding with described depletion of QI secondary segment 1 are inserted in described gas secondary flow through described flow-path tube jack 21 and air chamber 22
In hole, road 31, it is reserved with air cushion between radial direction surrounding and the surrounding hole wall in hole, described gas secondary flow road 31 of described flow-path tube 11 and is formed
Gap 32.
In the specific implementation, high temperature and high pressure gas is introduced into described air chamber by described pore 23 to embodiments of the invention one
After chamber 22 carries out stable buffering, with polymer melt between described flow-path tube 11 same direction stream in hole, described gas secondary flow road 31
To converging, the flow direction level of meet both fluids is consistent, and wherein gas is to be wrapped in polymer melt together
Extrusion, polymer melt and high temperature and high pressure gas enter hole, gas secondary flow road 31 after converging, and together extrude.
Embodiment two: on the basis of above-described embodiment one, described depletion of QI secondary segment 1, air chamber section 2 and gas secondary segment 3 all in
Cylindrical shape, seals against between the axial end that described depletion of QI secondary segment 1, air chamber section 2 and gas secondary segment 3 are adjacent, described depletion of QI
Axially corresponding respectively on secondary segment 1, air chamber section 2 and gas secondary segment 3 offering at least two dowel hole 4, described depletion of QI is auxiliary
The most corresponding respectively on section 1, air chamber section 2 and gas secondary segment 3 offer at least three bolt mounting holes 5, described alignment pin
Hole 4 and bolt mounting holes 5 all stagger described pore 23.In the middle of the process of assembling, in order to prevent each parts from having the changing of the relative positions existing
As, adding man-hour, first the overall processing of whole mouth die assembly becomes cylinder, and makes a call to two at the upper horizontal line of mouth die assembly entirety
Individual dowel hole 4, after cut according to the height of each parts, process its internal structure, each zero in mouth die assembly
Be in close contact between the axially adjacent end face of part is to be screwed to cross-head by installation bolt and realize sealing.
Embodiment three: in conjunction with the embodiments one or embodiment two, described flow channel entry point 12 is in coniform, and in cone shape institute
The conical top stating flow channel entry point 12 is corresponding with described flow-path tube 11, and described depletion of QI secondary segment 1 and flow-path tube 11 form a funnel
Shape structure, described flow-path tube 11 is rectangular tube, and hole, described gas secondary flow road 31 is square opening.
Embodiment four: in embodiment as above, in the center the most described gas secondary segment 3 in hole, described gas secondary flow road 31
Mandrel alignment side deviation 0.25mm, and described gas secondary segment 3 is when concrete installation is implemented, hole, described gas secondary flow road 31 is relatively described
The central axis level of gas secondary segment 3 is deflected downwardly, and causes air cushion layer lower half to block for preventing polymer melt gravity factor,
Therefore the size of the latter half, hole 31, gas secondary flow road is added when gas secondary segment 3 designs.
Embodiment five: the described flow-path tube 11 described long 5mm of air chamber section 2 of ratio, enters in order to avoid producing polymer melt adverse current
Air chamber 22, described flow-path tube 11 inserts 5mm in hole, gas secondary flow road 31 after described air chamber 22, and then makes described gas
Pad forms the opening direction in gap 32 and flows to identical with the polymer melt in flow-path tube 11, when in polymer melt extrusion
When high-temperature gas stops conveying, in the specific implementation, polymer melt is energy under the effect of extrusion inertia for the structure of the present embodiment
Continue extrusion along hole, gas secondary flow road, and then effectively avoid in polymer melt radially overflow air inlet 23.
Comprehensive described, technical scheme sufficiently effective can complete foregoing invention purpose, and the present invention
Structural principle and principle of work and power are the most sufficiently verified, and can reach intended effect and purpose, and
Embodiments of the invention can also convert according to these principles, and therefore, the present invention includes that all are in claim
All replacement contents in the range of being previously mentioned.Any equivalence change made in scope of the present invention patent, all belongs to this case
Within the scope of the claims of application.
Claims (6)
1. a gas auxiliary mouth die assembly, it is characterised in that: include coaxially being arranged in order the depletion of QI secondary segment of setting, air chamber section and gas
Secondary segment, the integrated flow-path tube that is provided with in centre of corresponding described air chamber section side, described stream on described depletion of QI secondary segment
Deferent is coaxial with described depletion of QI secondary segment, and on described depletion of QI secondary segment, the opposite side of corresponding described flow-path tube offers and described flow-path tube
The flow channel entry point of connection, described air chamber section is positioned at centre and offers flow-path tube jack and air chamber, institute the most successively
Stating flow-path tube jack to match with described flow-path tube, described flow-path tube jack connects and axially penetrates through described gas with described air chamber
Room section, described air chamber section is further opened with the pore of air chamber described in radial communication and outer axial face, described in described gas secondary segment correspondence
Flow-path tube offers hole, gas secondary flow road, the length of described flow-path tube more than described air chamber section length, less than described air chamber section with
The length sum of described gas secondary segment, the described flow-path tube other end corresponding with described depletion of QI secondary segment through described flow-path tube jack with
And air chamber is inserted in hole, described gas secondary flow road, the radial direction surrounding of described flow-path tube and the surrounding hole wall in hole, described gas secondary flow road
Between be reserved with air cushion formed gap.
A kind of gas auxiliary mouth die assembly the most according to claim 1, it is characterised in that: described depletion of QI secondary segment, air chamber section and
Gas secondary segment, all in cylindrical shape, seals against between the axial end that described depletion of QI secondary segment, air chamber section and gas secondary segment are adjacent, institute
State on depletion of QI secondary segment, air chamber section and gas secondary segment and the most corresponding respectively to offer at least two dowel hole, described depletion of QI
Axially corresponding respectively on secondary segment, air chamber section and gas secondary segment offer at least three bolt mounting holes, described dowel hole
And bolt mounting holes all staggers described pore.
A kind of gas auxiliary mouth die assembly the most according to claim 2, it is characterised in that: described flow channel entry point is coniform, and
Conical top in cone shape described flow channel entry point is corresponding with described flow-path tube, described depletion of QI secondary segment and flow-path tube composition one
Funnel-shaped structure.
A kind of gas auxiliary mouth die assembly the most according to claim 3, it is characterised in that: the center in hole, described gas secondary flow road is relative
The central axis level of described gas secondary segment is deflected downwardly.
A kind of gas auxiliary mouth die assembly the most according to claim 4, it is characterised in that: described flow-path tube is than described air chamber segment length
5mm。
A kind of gas auxiliary mouth die assembly the most according to claim 5, it is characterised in that: the center in hole, described gas secondary flow road is relative
The central axis level of described gas secondary segment is deflected downwardly 0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510221508.9A CN104943122B (en) | 2015-05-04 | 2015-05-04 | Gas auxiliary mouth die assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510221508.9A CN104943122B (en) | 2015-05-04 | 2015-05-04 | Gas auxiliary mouth die assembly |
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| Publication Number | Publication Date |
|---|---|
| CN104943122A CN104943122A (en) | 2015-09-30 |
| CN104943122B true CN104943122B (en) | 2017-01-04 |
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| CN201510221508.9A Expired - Fee Related CN104943122B (en) | 2015-05-04 | 2015-05-04 | Gas auxiliary mouth die assembly |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382078B (en) * | 2015-11-27 | 2019-01-08 | 徐州立方机电设备制造有限公司 | A kind of pipe fitting production stable-pressure device |
| CN107553857B (en) * | 2017-10-20 | 2024-04-05 | 南昌工程学院 | Gas-assisted micro-co-extrusion forming device for polymer processing |
| CN110421819A (en) * | 2019-07-23 | 2019-11-08 | 南昌大学 | A kind of wire and cable clad extrusion die and method |
| CN111844686B (en) * | 2020-07-21 | 2022-03-08 | 四川大学 | Ultrahigh molecular weight polyethylene plasticizing extrusion device and extrusion method |
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|---|---|---|---|---|
| CN101811358A (en) * | 2010-04-16 | 2010-08-25 | 大连海事大学 | Composite metal plastic pipe extrusion molding device and molding method thereof |
| CN102825752A (en) * | 2012-08-16 | 2012-12-19 | 南昌大学 | Gas-assistant extrusion molding device |
-
2015
- 2015-05-04 CN CN201510221508.9A patent/CN104943122B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811358A (en) * | 2010-04-16 | 2010-08-25 | 大连海事大学 | Composite metal plastic pipe extrusion molding device and molding method thereof |
| CN102825752A (en) * | 2012-08-16 | 2012-12-19 | 南昌大学 | Gas-assistant extrusion molding device |
Non-Patent Citations (2)
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| 气体辅助挤出成型技术的研究进展;黄益宾等;《塑料科技》;20081130;第90-93页 * |
| 气辅挤出口模的研究现状;余忠等;《上饶师范学院学报》;20140630;第22-25页 * |
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| CN104943122A (en) | 2015-09-30 |
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Effective date of registration: 20170509 Address after: School of Shangrao Normal University No. 401 Jiangxi city of Shangrao province Xinzhou 334000 Zhimin District Road Patentee after: Shangrao Normal University Address before: 401 No. 334000 Jiangxi city of Shangrao province Xinzhou District Zhimin Road Patentee before: Liu Hesheng |
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