CN2675382Y - Electric field polymer extruder head - Google Patents
Electric field polymer extruder head Download PDFInfo
- Publication number
- CN2675382Y CN2675382Y CNU2004200193133U CN200420019313U CN2675382Y CN 2675382 Y CN2675382 Y CN 2675382Y CN U2004200193133 U CNU2004200193133 U CN U2004200193133U CN 200420019313 U CN200420019313 U CN 200420019313U CN 2675382 Y CN2675382 Y CN 2675382Y
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- electric field
- polymer
- extruder head
- battery lead
- lead plate
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The electric field type polymer extruder head of the utility model belongs to the forming and processing field of polymer materials, in particular to the improvement of a screw extruder. The utility model provides the electric field type polymer extruder head which is that a pair of electrode boards for exerting pulsating voltage or direct current voltage are arranged on the machine head of the common screw extruder. The electric field type polymer extruder head provided by the utility model obtains the purposes that the tropism action of the large molecular chains and the molecular chains of polymer melting bodies is led, the adhesiveness of the melting bodies is reduced, and the required pressure for extruding melting bodies is reduced. Specially compared with the traditional oscillation type polymer extruder head, the electric field type polymer extruder head does not have the excessive expensive affiliated corollary equipment, such as an ultrasonic generator, an electromagnetic wave generator, etc., and thus, the electric field type polymer extruder head has the features of reasonable structure, simple device, convenient manufacture, low cost, simple and convenient producing operation, etc. The electric field type polymer extruder head is in convenient for being generalized in the forming and processing industries of the polymer materials of plastics, rubber, etc.
Description
Technical field
The utility model belongs to polymeric material processing and forming field, specifically is meant a kind of improvement of screw extruder head.
Background technology
Macromolecular material is the up-and-coming youngster in the material field, it mainly comprises synthetic resin and plastics, synthetic fibers and synthetic rubber three major types, usually be referred to as " three big synthetic materials ", compare with other material, that plastics have is in light weight, corrosion-resistant, specific strength is high, electrical property is excellent, be processed into characteristics such as various beautiful appearances and bright goods easily, become the indispensable important composition of material industry, and be new and high technology most active fields in the material industry.
At present, the application of plastics just progressively enlarges, relate to the various aspects and even the daily life of national economy, as replace metal material, timber, pottery, glass, leather, paper, lacquerware, rubber, building stones or the like such as iron and steel, copper, aluminium with plastics.In addition, plastics can also be made the functional plastic product.Plastic products are widely used in industrial departments such as agricultural, fish animal husbandry, electric, machinery instrument, automobile, Aero-Space, chemical industry, construction material, packing.
The conversion of plastics from moulding material to plastic products with practical value must be passed through molding process, and the method for processing forming of plastic products is extruded, injected, calendering etc., but wherein most important also be that fundamental method is extrusion molding.Most of thermoplastic can both be processed with the method, and it has continuous production, production efficiency height, characteristics such as applied range.Can produce tubing, bar, sheet material, film, monofilament, electric wire, profile shapes and hollow container etc., and the extrusion molding product is widely used in all trades and professions, is closely related with daily life.
In the relevant therewith plastic processing industry of China, almost the plastic products of 1/3-1/2 are finished by extrusion molding.As the second largest series products of molding machine, the output of extrusion molding unit and sales volume account for 20%～25% of plastics machinery, and product is distributed in industries such as machinery, light industry, chemical industry, boats and ships.
All the time, people are always around how improving quality of item, energy-saving and cost-reducing and improve aspect such as machine performance and improve extruder gradually, promptly the single-screw machine from routine goes out machine, to the new type single screw machine go out machine, dual-screw-stem machine goes out machine, until 20 appearance that have the vibration extruder of great innovative significance the end of the century.
But at present, be applied to capital equipment in the forming polymer manufacture fields such as plastics, rubber and remain the screw extruder that goes out all sizes such as machine, anisotropic parallel and conical double screw extruder with the cocurrent and parallel dual-screw-stem machine and take product as the leading factor, the structure of its cross-head as shown in Figure 1.It closely links to each other with outlet of extruder by screw.But, because polymer malt viscosity is big, producing bigger resistance when making melt flows, this just requires the required pressure of melt extrusion to strengthen.In order to overcome this defective, be by the development new type screw extruder on the one hand, as increasing extruder screw diameter and draw ratio, and improve method such as screw speed.Yet from present research, the degree of this respect progress is near the final limit of its potentiality.Be by applying vibration force on the other hand to improve fluidity of molten this purpose, ultrasonic vibration parts or electromagnetic wave vibrating mass commonly are set on die head, but after applying vibration force, the product surface of extruding is prone to ripple, and make product surface rough, influenced the presentation quality of manufactured goods; And the stability when applying vibration force and causing the extruder extruded product reduces; Simultaneously,, cause the manufacturing cost of extruder to increase, also increased the complexity of operation simultaneously because attached corollary apparatus such as supersonic generator, electromagnetic wave generator cost an arm and a leg.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming one by one in the above-mentioned prior-art devices, provide a kind of can directs polymer molecular melt segment and the orientation of strand, reduce melt viscosity, reduce the required pressure of melt extrusion, improve and extrude stability, and rational in infrastructure, device is simple, the technique device of low cost of manufacture.
According to the research of polymer property as can be known, usually, no matter non-polar polymer or polar polymer all are rendered as electroneutral under usual situation.But under electric field action, the characteristic along the positive extreme direction preferred orientation of electric field appears in the elastic displacement of constraint charge generation or dipole in its molecule.According to this theory, polymer melt is placed electric field, charged polymer melt strand is stretched under the effect of electric field force, and preferred orientation, its result, promoted the disentanglement process of entanglement point on the one hand, thereby make entanglement density reduce, the hole increases, and melt viscosity reduces, promote flowing of melt, make polymer melt strand marshalling on the other hand.
The technical solutions of the utility model that propose based on above-mentioned theory are:
Then can strengthen the principle of the degree of orientation of strand according to the pulsating volage that applies the Any shape more than the no-voltage, on the common screw cross-head, around the melt flow channel that constitutes by adpting flange import and block and die head core, a pair of pole plate is set.One of pole plate is between adpting flange inboard and block, and another pole plate is positioned at the die head core lower end that is connected with melt flow channel, applies pulsating volage or DC voltage therebetween.
Show by the characteristic research to different polymer: the polymer stronger to polarity as polyvinyl alcohol, polyester, polyvinyl chloride, aminoplast etc., can apply lower DC voltage or pulsating volage; The polymer more weak to polarity, as polystyrene, polydichlorstyrene, natural rubber etc. or non-polar polymer as polyethylene, polypropylene, polytetrafluoroethylene (PTFE) etc., then can apply higher pulsating volage; In addition, should consider to avoid the generation of the electrical breakdown of machined material, therefore, the voltage that is applied forces down than the breakdown potential that material can bear.In view of the above, the polymer-extruded machine head of a kind of Electric field that the utility model proposes applies the concrete numerical value of voltage, needs to require to decide according to dissimilar material properties and processing technology, and its scope is between 0～100KV.Table 1 has provided the breakdown strength of some polymer.
The electric breakdown strength of some polymer of table 1 (20 ℃)
| The polymer title | Electric breakdown strength (KV/mm) |
| Polyethylene (LDPE/HDPE) | Greater than 20 |
| General Purpose Polystyrenre | More than or equal to 20 |
| Impact- | 12～24 |
| Nylon (moulded work) | 24 |
| Polytetrafluoroethylene (PTFE) | 20 |
| Natural rubber (soft) | 18 |
| Natural rubber (firmly) | 20 |
Description of drawings
Fig. 1 is the structural representation of traditional cross-head;
Fig. 2 is the structural representation of the polymer-extruded machine head of the utility model Electric field;
Fig. 3 is the structural representation of the polymer-extruded machine head A part of the utility model Electric field;
Fig. 4 is the structural representation of the polymer-extruded machine head B part of the utility model Electric field.
The specific embodiment:
The utility model will be further described below in conjunction with accompanying drawing.
The polymer-extruded machine head of a kind of Electric field that the utility model proposes, it is reached with the block 10 that embeds adpting flange 3 inwalls by adpting flange 3 and external heat cover 2 thereof is made up of 3 mouthfuls of melt flow channel 11 and die head seats 13 that constitute with block 10,12 smooth connections of die head core of adpting flange, and it is provided with battery lead plate 6 and the battery lead plate 15 that applies voltage around melt flow channel 11.
The polymer-extruded machine head of a kind of Electric field, its battery lead plate 6 are on adpting flange 3 inwalls between felt pad 4 and the block 10, and another battery lead plate 15 is between die head core 12 lower ends and following felt pad 16 that constitute melt flow channel 11; Die head core 12 places in the die head seat 13, and it is connected with adpting flange 3 by screwed die head seat 13; Block 10 in the adpting flange 3 compresses by the baffle plate 7 of fixedlying connected with adpting flange 3.
The polymer-extruded machine head of a kind of Electric field, it applies pulsating volage or DC voltage on battery lead plate 6 and battery lead plate 15; The magnitude of voltage that applies requires to decide according to rapidoprint characteristic and different process between 0～100KV.
The polymer-extruded machine head of a kind of Electric field, its battery lead plate 6 and battery lead plate 15 must have one to be ground connection.
The polymer-extruded machine head of a kind of Electric field, felt pad 4, block 10, die head core 12 and following felt pad 16 all adopt resistant to elevated temperatures ceramic material on it.
In sum, the remarkable difference of the utility model and traditional screw extruder is to be provided with a pair of battery lead plate that applies pulsating volage or DC voltage on the head of common screw extruder.The polymer-extruded machine head of the Electric field that the utility model provides, it places electric field with polymer melt, charged polymer melt strand is stretched under the effect of electric field force, and preferred orientation, has promoted the disentanglement process of entanglement point on the one hand, thereby make entanglement density reduce, the hole increases, and melt viscosity reduces, and has promoted flowing of melt, make polymer melt strand marshalling on the other hand, thereby optimize the quality of extruded product.Compare with the polymer-extruded machine head of traditional oscillatory type especially, it is not as too much expensive attached corollary equipments such as supersonic generator, electromagnetic wave generators, thereby it has characteristics such as rational in infrastructure, that simple, easily manufactured, the cost of device is low and production operation is easy, is beneficial in polymeric material processing and forming industries such as plastics, rubber and promotes.
Claims (6)
1, the polymer-extruded machine head of a kind of Electric field, it has the block (10) of adpting flange (3) and external heat cover (2) and embedding adpting flange (3) inwall and is made up of melt flow channel (11) and die head seat (13) that adpting flange (3) mouth and block (10), die head core (12) smooth connection constitute, it is characterized in that: battery lead plate (6) and the battery lead plate (15) that applies voltage is set on every side in melt flow channel (11).
2, the polymer-extruded machine head of Electric field as claimed in claim 1, it is characterized in that: battery lead plate (6) is positioned between the last felt pad (4) and block (10) of adpting flange (3) inwall, and another battery lead plate (15) is positioned between die head core (12) lower end and following felt pad (16) that constitutes melt flow channel (11); Die head core (12) places in the die head seat (13), and it is connected with adpting flange (3) by screwed die head seat (13); Block (10) in the adpting flange (3) compresses by the baffle plate (7) of fixedlying connected with adpting flange (3).
3, claim 1, the polymer-extruded machine head of 2 described Electric fields is characterized in that: apply pulsating volage or DC voltage on battery lead plate (6) and battery lead plate (15).
4, as claim 1, the polymer-extruded machine head of 3 described Electric fields, it is characterized in that: the magnitude of voltage that applies is between 0～100KV.
5, as claim 1, the polymer-extruded machine head of 2 described Electric fields, it is characterized in that: battery lead plate (6) and battery lead plate (15) must have one to be ground connection.
6, as claim 1, the polymer-extruded machine head of 2 described Electric fields, it is characterized in that: go up felt pad (4), block (10), die head core (12) and following felt pad (16) and all adopt resistant to elevated temperatures ceramic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200193133U CN2675382Y (en) | 2004-01-08 | 2004-01-08 | Electric field polymer extruder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200193133U CN2675382Y (en) | 2004-01-08 | 2004-01-08 | Electric field polymer extruder head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2675382Y true CN2675382Y (en) | 2005-02-02 |
Family
ID=34483104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200193133U Expired - Lifetime CN2675382Y (en) | 2004-01-08 | 2004-01-08 | Electric field polymer extruder head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2675382Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314529C (en) * | 2004-01-08 | 2007-05-09 | 东华大学 | Electric field type polymer extruder head |
-
2004
- 2004-01-08 CN CNU2004200193133U patent/CN2675382Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314529C (en) * | 2004-01-08 | 2007-05-09 | 东华大学 | Electric field type polymer extruder head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20040108 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |