CN202781768U - Gas-assisted extrusion molding device - Google Patents
Gas-assisted extrusion molding device Download PDFInfo
- Publication number
- CN202781768U CN202781768U CN2012204081786U CN201220408178U CN202781768U CN 202781768 U CN202781768 U CN 202781768U CN 2012204081786 U CN2012204081786 U CN 2012204081786U CN 201220408178 U CN201220408178 U CN 201220408178U CN 202781768 U CN202781768 U CN 202781768U
- Authority
- CN
- China
- Prior art keywords
- gas
- extruding zone
- air
- auxiliary extruding
- valve
- 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
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 44
- 229920000642 polymer Polymers 0.000 claims abstract description 7
- 210000003128 Head Anatomy 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 6
- 230000002522 swelling Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010094 polymer processing Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
Abstract
The utility model discloses a gas-assisted extrusion molding device. The device comprises an extruder, a gas control system and a gas-assisted extrusion molding die. During the extrusion molding process, and a polymer melt forms a stable gas cushion film layer between the inner wall of the extrusion die and an extruded melt, so that frictional resistance of the wall surface of the die for the extruded melt is reduced, the swelling phenomenon in the extrusion molding process can be eliminated basically, the pressure drop of the die is reduced, and the surface quality problem which is caused by a 'sharkskin' phenomenon and an extrusion fracture phenomenon during the extrusion molding process is avoided.
Description
Technical field
The utility model patent belongs to polymer-extruded forming field, make polymer melt in the extrusion molding process by a kind of gas control system and gas-assisted extrusion mouth mould, between extrusion neck ring mold inwall and melt extrusion, form stable air cushion rete, thereby reduce mouthful die side wall to the frictional resistance of melt extrusion.
Background technology
Advantage becomes one of Polymer Processing basic forming method already because its variations is many, purposes is wide, production efficiency is high, small investment, production are continuous etc. in extrusion molding, polymer product about 40% is by extruding machine-shaping, and extrusion molding plays a part very important in Polymer Processing.But there is following problem in traditional extrusion molding: 1) extrusion swelling, extrusion swelling refer to the phenomenon that the extrudate sectional dimension is larger than extrusion neck ring mold size, and extrusion swelling has increased the extrusion neck ring mold design difficulty, affect the goods precision.2) the extrusion neck ring mold pressure drop is large, because the high viscosity of polymeric material needs very large mouth molding pressure to overcome mouthful mould inwall to the resistance of extrudate when extruding, cause pressure drop of die large, thereby so that the extruded product internal stress increases, cause distortion to increase, also increased energy consumption simultaneously.3) extrudate surface quality defect, when extruded velocity surpassed a certain limit, the extrudate surface " sharkskin " occurred and extrudes the phenomenon such as break, and the appearance of extrudate surface quality defect has limited the raising of extruded velocity, affects production efficiency.More than three problems all relevant to the resistance of melt extrusion with the mouth mould, the reducing adhesion resistance between mouthful mould and the melt is crucial.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, and a kind of gas-assisted extrusion device is provided.Its technical scheme is by form stable air cushion rete at the mouth die side wall, the mouth die side wall drops to bottom line to the frictional resistance of extruding the homogeneous phase body, the die extrusion process is the non-adhesion die extrusion of complete slippage by traditional non-slippage adhesion die extrusion machine, extrudate is piston-shaped to be extruded, thereby realize to eliminate extrusion swelling, reduces pressure drop of die and improve the purpose of extrudate surface quality.
The utility model comprises: extruder, gas control system and gas are assisted extrusion neck ring mold three parts; Extruder comprises power section, feed hopper, screw rod, heater; Gas control system comprises air compressor machine, air accumulator, valve, flowmeter, electromagnetic proportional valve, D/A transition card, Pressure gauge, computer, pressure servo valve, pressure sensor, A/D transition card, temperature controller, gas heater; Air-Assisted Extrusion of Polymer mouth mould comprises head connecting plate, bolt, pressing plate, pressure-temperature sensor, mouthful mould overcoat, air inlet, screw, the auxiliary extruding zone of gas is arranged and without the auxiliary extruding zone of gas;
Air compressor machine connects the air accumulator entrance through valve, the air accumulator outlet is connected with air inlet with valve, flowmeter, electromagnetic proportional valve, Pressure gauge, pressure sensor, temperature controller, gas heater and is connected, be connected by pressing plate, bolt and head connecting plate without the auxiliary extruding zone of gas, mouthful mould overcoat by screw with connect without the auxiliary extruding zone of gas, have the auxiliary extruding zone of gas by screw be connected the mould overcoat and connect, mouthful mould overcoat and without the auxiliary extruding zone of gas, have the auxiliary extruding zone of gas to form air chamber, without the auxiliary extruding zone of gas with have between the auxiliary extruding zone of gas the air inlet slit is arranged.
Technological merit of the present utility model is: realize forming in the extrusion air cushion rete by gas control system and the auxiliary extrusion neck ring mold of gas between mouth mould inwall and polymer melt, thereby make mouthful mould inwall drop to bottom line to the frictional resistance of melt extrusion, the work of realizing the reducing adhesion resistance is in order to solve " sharkskin " in the large and extrusion of the extrusion swelling phenomenon, the extrusion neck ring mold pressure drop that produce in the polymer-extruded process and to extrude the problem of surface quality defects such as breaking.
Description of drawings
Accompanying drawing 1 is gas-assisted extrusion device sketch;
Among the figure: 1 air compressor machine, 2 valves, 3 air accumulators, 4 feed hoppers, 5 valves, 6 flowmeters, 7 electromagnetic proportional valves, 8A/D transition card, 9 Pressure gauges, 10 computers, 11 pressure servo valves, 12 pressure sensors, 13 D/A transition cards, 14 temperature controllers, 15 gas heaters, 28 heaters, 29 screw rods, 30 power sections.
Fig. 2 is gas-assisted extrusion mouth mould enlarged drawing;
Among the figure: 16 head connecting plates, 17 pressing plates, 18 bolts, 19 temperature sensors, 20 mouthfuls of mould overcoats, 21 air inlets, 22 screws, 23 have auxiliary mouthful of mould section of gas, 24 air chambers, 25 screws, 26 air inlet slits, 27 without auxiliary mouthful of mould section of gas.
The specific embodiment
The utility model comprises: extruder, gas control system and gas are assisted extrusion neck ring mold three parts; Extruder comprises power section, feed hopper, screw rod, heater; Gas control system comprises air compressor machine, air accumulator, valve, flowmeter, electromagnetic proportional valve, D/A transition card, Pressure gauge, computer, pressure servo valve, pressure sensor, A/D transition card, temperature controller, gas heater; Air-Assisted Extrusion of Polymer mouth mould comprises head connecting plate, bolt, pressing plate, pressure-temperature sensor, mouthful mould overcoat, air inlet, screw, the auxiliary extruding zone of gas is arranged and without the auxiliary extruding zone of gas;
Air compressor machine connects the air accumulator entrance through valve, the air accumulator outlet is connected with air inlet with valve, flowmeter, electromagnetic proportional valve, Pressure gauge, pressure sensor, temperature controller, gas heater and is connected, be connected by pressing plate, bolt and head connecting plate without the auxiliary extruding zone of gas, mouthful mould overcoat by screw with connect without the auxiliary extruding zone of gas, have the auxiliary extruding zone of gas by screw be connected the mould overcoat and connect, mouthful mould overcoat and without the auxiliary extruding zone of gas, have the auxiliary extruding zone of gas to form air chamber, without the auxiliary extruding zone of gas with have between the auxiliary extruding zone of gas the air inlet slit is arranged.
Claims (1)
1. a gas-assisted extrusion device is characterized in that, described device comprises: extruder, gas control system and gas are assisted extrusion neck ring mold three parts; Extruder comprises power section, feed hopper, screw rod, heater; Gas control system comprises air compressor machine, air accumulator, valve, flowmeter, electromagnetic proportional valve, D/A transition card, Pressure gauge, computer, pressure servo valve, pressure sensor, A/D transition card, temperature controller, gas heater; Air-Assisted Extrusion of Polymer mouth mould comprises head connecting plate, bolt, pressing plate, pressure-temperature sensor, mouthful mould overcoat, air inlet, screw, the auxiliary extruding zone of gas is arranged and without the auxiliary extruding zone of gas;
Air compressor machine connects the air accumulator entrance through valve, the air accumulator outlet is connected with air inlet with valve, flowmeter, electromagnetic proportional valve, Pressure gauge, pressure sensor, temperature controller, gas heater and is connected, be connected by pressing plate, bolt and head connecting plate without the auxiliary extruding zone of gas, mouthful mould overcoat by screw with connect without the auxiliary extruding zone of gas, have the auxiliary extruding zone of gas by screw be connected the mould overcoat and connect, mouthful mould overcoat and without the auxiliary extruding zone of gas, have the auxiliary extruding zone of gas to form air chamber, without the auxiliary extruding zone of gas with have between the auxiliary extruding zone of gas the air inlet slit is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204081786U CN202781768U (en) | 2012-08-17 | 2012-08-17 | Gas-assisted extrusion molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204081786U CN202781768U (en) | 2012-08-17 | 2012-08-17 | Gas-assisted extrusion molding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202781768U true CN202781768U (en) | 2013-03-13 |
Family
ID=47809097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204081786U Expired - Fee Related CN202781768U (en) | 2012-08-17 | 2012-08-17 | Gas-assisted extrusion molding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202781768U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111844686A (en) * | 2020-07-21 | 2020-10-30 | 四川大学 | Ultrahigh molecular weight polyethylene plasticizing extrusion device and extrusion method |
-
2012
- 2012-08-17 CN CN2012204081786U patent/CN202781768U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111844686A (en) * | 2020-07-21 | 2020-10-30 | 四川大学 | Ultrahigh molecular weight polyethylene plasticizing extrusion device and extrusion method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130817 |