CN104589629A - Method and extrusion die head for disturbing thickness distribution of extruded thin film casting sheet - Google Patents
Method and extrusion die head for disturbing thickness distribution of extruded thin film casting sheet Download PDFInfo
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- CN104589629A CN104589629A CN201410710300.9A CN201410710300A CN104589629A CN 104589629 A CN104589629 A CN 104589629A CN 201410710300 A CN201410710300 A CN 201410710300A CN 104589629 A CN104589629 A CN 104589629A
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- 238000009826 distribution Methods 0.000 title claims abstract description 56
- 238000001125 extrusion Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000010409 thin film Substances 0.000 title abstract description 9
- 238000005266 casting Methods 0.000 title abstract 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 79
- 239000000155 melt Substances 0.000 claims abstract description 37
- 230000008859 change Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- 206010037660 Pyrexia Diseases 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 230000005674 electromagnetic induction Effects 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000010408 film Substances 0.000 description 67
- 101100520231 Caenorhabditis elegans plc-3 gene Proteins 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000006870 function Effects 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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
- 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
-
- 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
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/865—Heating
-
- 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
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
- B29C2948/92647—Thickness
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
-
- 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
- B29L2007/00—Flat articles, e.g. films or sheets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the thin film production technical field, and particularly relates to a method for disturbing thickness distribution of an extruded thin film casting sheet; a PLC controller respectively controls a plurality of heating elements distributed on an extrusion die head, so as to control heating temperatures of the extrusion die head on melts at different areas, then the viscosities of the melts at the different areas are controlled, and finally the flow quantity of the melts extruded from different areas of the extrusion die head at unit time and the thickness of the thin film casting sheet are controlled, so that the thickness distribution of the extruded thin film casting sheet can be disrupted. Compared with the prior art, the PLC controller respectively controls the heating elements for heating according to self heating programs, so that the heating temperatures of the extrusion die head on the melts at the different areas, the viscosities, the amount of time-unit extruded melts and the thickness of the thin film casting sheet can be controlled, and thus the thickness distribution of the extruded thin film casting sheet can be disrupted. Through the control of the PLC controller, the thickness distribution of the thin film casting sheet in the transverse direction can be artificially disrupted.
Description
Technical field
The invention belongs to thin film fabrication techniques field, particularly relating to a kind of method and extrusion die of the thickness distribution for upsetting the film slab extruded.
Background technology
Extruder is the conventional equipment of film production, utilizes extruder to produce the principle of film to be: pellet enters into the machine barrel of extruder from hopper, issues raw physical change at hot pressing function, and push ahead, due to the resistance of filter plate, head and machine barrel, make pellet compacting, exhaust; Meanwhile external heat source and material frictional heat make pellet be subject to thermoplastification, become melting viscous state, by means of screw rod thrust, extrude quantitatively from extrusion die, and the film of formation is cooled by chill roll, then rolling obtains film slab.According to actual needs, the later stage can also be reprocessed film slab by modes such as stretchings.As barrier film conventional in lithium ion battery, be exactly first obtain the thicker film slab containing plasticizer, then by stretching, extracting the film that the operations such as plasticizer obtain desired thickness and required porosity.
Wherein, the function of extrusion die is to make from the plastic melt in extruder barrel well distributed in its runner, to extrude and shaping from die orifice under uniform speed.
But, in the production process of existing film slab, due to the plasticizer contained in film run into chill roll time, can be bonded on chill roll, thus can at chill roll circumferentially, " silk noil "---the part surface of chill roll has cold oil, and part surface does not then have cold oil in addition in formation; The cold oil of the part surface of chill roll is thicker in other words, and the cold oil of part surface is then thinner in addition." silk noil " like this can affect the thickness distribution of film slab, when the film of the heat extruded from die head is through chill roll, in film slab in a lateral direction, thickness will have the waveform distribution of crest and trough, namely some places are thick, some places are thin, the phenomenon of this became uneven is constantly accumulated on the length direction of film slab, during rolling, on the length direction of film slab, thick place and thick place mutually stacking, thin place and thin place mutually stacking, finally cause film slab to be rolled up macroscopically to show " heaving " and " depression ", namely film slab is macroscopically in " waveform ", the stacking phenomenon of the film slab that Here it is extrudes.This is unfavorable for that the later stage is to process such as the stretchings of film slab, affects the quality of production of film greatly.Such distribution can't help people control.
In view of this, necessary method and the extrusion die that a kind of thickness distribution for upsetting the film slab extruded is provided, to upset the thickness distribution of the film slab extruded, namely upset the thickness distribution of film slab within the specific limits according to actual requirement, make its thickness distribution become controlled.
Summary of the invention
An object of the present invention is: for the deficiencies in the prior art, and a kind of method of the thickness distribution for upsetting the film slab extruded is provided, to upset the thickness distribution of the film slab extruded, namely upset the thickness distribution of film slab within the specific limits according to actual requirement, make its thickness distribution become controlled.
In order to achieve the above object, the present invention adopts following technical scheme:
For upsetting the method for the thickness distribution of the film slab extruded, PLC controls several heating element heaters be distributed on extrusion die respectively, to control the heating-up temperature of extrusion die to the melt of zones of different, thus control the viscosity of the melt of zones of different, the thickness of the melt flow that the final control unit interval is extruded from the zones of different of extrusion die and film slab, can upset the thickness distribution of the film slab extruded.
Improve for the one upsetting the method for the thickness distribution of the film slab extruded as the present invention, extrusion die often extrudes the long film slab of 5m ~ 500m, and namely PLC controls at least one heating element heater and change a heating-up temperature.
Improve for the one upsetting the method for the thickness distribution of the film slab extruded as the present invention, be transverse axis with time, be that the longitudinal axis builds temperature-time curve with temperature, each heating element heater temperature-time curve all not identical.
Improve for the one upsetting the method for the thickness distribution of the film slab extruded as the present invention, described heating-up temperature is 140 DEG C ~ 250 DEG C.
Relative to prior art, the present invention controls each heating element heater respectively by PLC and heats according to respective heating schedule, thus the heating-up temperature of extrusion die to the melt of zones of different can be controlled, for the melt of identical material, temperature is different, then viscosity is also different, therefore the viscosity of the melt of zones of different can be controlled, and for the melt of identical material, viscosity difference just means the melt amount that the unit interval flows out, therefore the amount of the melt that the unit interval is extruded from the zones of different of extrusion die can just be controlled, and then the thickness of film slab can be controlled, so can upset the thickness distribution of the film slab extruded.That is, by the control of PLC, film slab thickness distribution in a lateral direction can be upset artificially, make its thickness distribution become controlled, thus the flat appearance degree of film slab volume can be improved, improve the quality of production of film.
Another object of the present invention is the extrusion die providing a kind of thickness distribution for upsetting the film slab extruded, comprise with the front mould of front die lip and the rear mold with rear die lip, the die orifice of described front die lip and described rear die lip composition extruder, also comprise PLC, described front mould and described rear mold are provided with several heating element heaters and several temperature sensors, described heating element heater is connected with described temperature sensor, and described heating element heater is all connected with described PLC with described temperature sensor.
Improve for the one upsetting the extrusion die of the thickness distribution of the film slab extruded as the present invention, described front mould is connected by screw with described rear mold, by the aperture regulating described screw to regulate described die orifice.
Improve for the one upsetting the extrusion die of the thickness distribution of the film slab extruded as the present invention, described heating element heater is resistance wire, electric heating tube, Electrothermal ring, electric hot plate, electrical bar, mica fever tablet, microwave heating equipment or electromagnetic induction thermal.
Improve for the one upsetting the extrusion die of the thickness distribution of the film slab extruded as the present invention, described temperature sensor is thermocouple and thermistor, and the end of probe of described temperature sensor and the melt contacts that flows through between described front mould and described rear mold.
Improve for the one upsetting the extrusion die of the thickness distribution of the film slab extruded as the present invention, described PLC comprises:
Data memory module, for storing the heating schedule to individual heating element heater, described heating schedule is is transverse axis with time, take temperature as the temperature-time curve that the longitudinal axis builds;
Data read module, for reading the signal of described temperature sensor;
Data processing module, for processing the data read, obtains real-time temperature values;
Data comparison module, for comparing the temperature value that on real-time temperature values and temperature-time curve, this time is corresponding, and provides result;
Data outputting module, for result is outputted to described heating element heater:
If real-time temperature values is greater than temperature value corresponding to this time, then this result is transferred to described heating element heater by data outputting module, makes it suspend heating;
If real-time temperature values is less than temperature value corresponding to this time, then this result is transferred to described heating element heater by data outputting module, makes it start heating.
Improve for the one upsetting the extrusion die of the thickness distribution of the film slab extruded as the present invention, the top in the space of described front mould and described rear mold composition is connected with feeding pipe, described feeding pipe is provided with connector, described connector is provided with hanging member.
Relative to prior art, the present invention by connecting PLC on each heating element heater of extrusion die, make PLC can control each heating element heater respectively, to change the temperature of the melt in each region of extrusion die according to certain rule, and then change the viscosity of melt and the flow of unit interval in each region of extrusion die, final realization controls the human intervention of the thickness distribution of film slab, namely can upset film slab thickness distribution in a lateral direction artificially, the thickness distribution controllability of film slab is strengthened.The cost of improvement of the present invention is very low, but can play good economic benefits.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 2.
Fig. 2 is the structure principle chart of PLC in the embodiment of the present invention 2.
Wherein:
1-front mould, 2-rear mold, 3-PLC controller, 31-data memory module, 32-data read module, 33-data processing module, 34-data comparison module, 35-data outputting module, 4-heating element heater, 5-temperature sensor, 6-screw, 7-feeding pipe, 8-connector, 9-hanging member, 10-chill roll.
Detailed description of the invention
Below with reference to specific embodiment, the present invention and beneficial effect thereof are described in further detail, but the specific embodiment of the present invention is not limited to this.
Embodiment 1
Present embodiments provide a kind of method of the thickness distribution for upsetting the film slab extruded: PLC controls several heating element heaters be distributed on extrusion die respectively, to control the heating-up temperature of extrusion die to the melt of zones of different, for the melt of identical material, heating-up temperature is different, then viscosity is different, thus the viscosity of the melt of zones of different can be controlled, and the viscosity of melt can affect the mobility of melt, thus finally can control the melt flow that the unit interval extrudes from the zones of different of extrusion die, thus control the thickness of film slab, so can upset the thickness distribution of the film slab extruded artificially.
Wherein, extrusion die often extrudes the long film slab of 5m ~ 500m, and namely PLC controls at least one heating element heater and change a heating-up temperature, and concrete arranging can be carried out according to actual needs, during practical operation, only need to carry out setting on the control panel of PLC.
Be transverse axis with time, be that the longitudinal axis builds temperature-time curve with temperature, each heating element heater temperature-time curve all not identical, namely the temperature variation curve that each heating element heats behavior embodies is different, so just can upset the thickness distribution of film slab.
Heating-up temperature is 140 DEG C ~ 250 DEG C, the heating-up temperature interval of each heating element heater can be arranged according to the material of melt, for lithium ion battery barrier film, temperature range is 190 DEG C ~ 200 DEG C, and namely the heating-up temperature of each heating element heater changes in this interval.
The present embodiment controls each heating element heater respectively by PLC and heats according to respective heating schedule, thus the heating-up temperature of extrusion die to the melt of zones of different can be controlled, for the melt of identical material, temperature is different, then viscosity is also different, therefore the viscosity of the melt of zones of different can be controlled, and for the melt of identical material, viscosity difference just means the melt amount that the unit interval flows out, therefore the amount of the melt that the unit interval is extruded from the zones of different of extrusion die can just be controlled, and then the thickness of film slab can be controlled, so can upset the thickness distribution of the film slab extruded.That is, by the control of PLC, film slab thickness distribution in a lateral direction can be upset artificially, make its thickness distribution become controlled, thus the flat appearance degree of film slab volume can be improved, improve the quality of production of film.
Embodiment 2
As shown in Figure 2, the extrusion die of a kind of thickness distribution for upsetting the film slab extruded that the present embodiment provides, comprise the front mould 1 with front die lip and the rear mold 2 with rear die lip, the die orifice of front die lip and rear die lip composition extruder, melt is extruded from die orifice behind the gap between front mould 1 and rear mold 2, on chill roll 10 after cooling, form film slab, this extrusion die also comprises PLC 3, front mould 1 and rear mold 2 are provided with several heating element heater 4 and several temperature sensors 5, heating element heater 4 is connected with temperature sensor 5, a corresponding heating element heater 4 of temperature sensor 5, and heating element heater 4 is all connected with PLC 3 with temperature sensor 5.Temperature sensor 5 is for sensing the real time temperature of melt, and heating element heater 2 is used for melt heating.Heating element heater 4 and temperature sensor 5 are all set to several, are conducive to the temperature also real-time control of realization to the temperature of the melt in variant region of the melt in the variant region of Real-Time Monitoring.
Wherein, front mould 1 is connected by screw 6 with rear mold 2, is regulated the aperture of die orifice by set screw 6.Screw 6 connects not only easy for installation, and can change the aperture of die orifice easily, to be applicable to extruding of the film of different-thickness.Meanwhile, screw 6 connects also for convenience detach, thus is convenient to die cleaned.
Heating element heater 4 is resistance wire, electric heating tube, Electrothermal ring, electric hot plate, electrical bar, mica fever tablet, microwave heating equipment or electromagnetic induction thermal.These elements all have the function of heating.
Temperature sensor 5 is thermocouple and thermistor.Preferred thermistor, because thermistor volume is very little, also fast to the response of variations in temperature.And the end of probe of temperature sensor 5 and the melt contacts flow through between front mould 1 and rear mold 2, thus can direct sensing to the real-time temperature values of melt, improve temperature controlled accuracy.
PLC 3 comprises:
Data memory module 31, for storing the heating schedule to individual heating element heater 4, heating schedule is is transverse axis with time, take temperature as the temperature-time curve that the longitudinal axis builds;
Data read module 32, for the signal of reading temperature sensor 5;
Data processing module 33, for processing the data read, obtains real-time temperature values;
Data comparison module 34, for comparing the temperature value that on real-time temperature values and temperature-time curve, this time is corresponding, and provides result;
Data outputting module 35, for outputting to heating element heater 4 by result.
The input of data read module 31 is connected with the output of temperature sensor 5, the output of data read module 31 is connected with the input of data processing module 32, the output of data memory module 31 is also connected with the input of data processing module 32, the output of data processing module 32 is connected with the input of data comparison module 33, the output of data comparison module 33 is connected with the input of data outputting module 34, and the output of data outputting module 34 is connected with heating element heater 4.
The control method of PLC 3 is:
The first step, data read module 31 reads and transmits from temperature sensor 5 the signal (temperature sensor 5 senses the real-time temperature values of melt) of coming;
Second step, data processing module 32 transmits according to temperature sensor 5 real-time temperature values that the signal come calculates the melt near this temperature sensor 5;
3rd step, data comparison module 33 compares this heating element heater 4 of storing in the real-time temperature values of melt and data memory module 31 at temperature value corresponding to this moment:
If real-time temperature values is greater than temperature value corresponding to this time, then this result is transferred to heating element heater 4 by data outputting module 35, makes it suspend heating;
If real-time temperature values is less than temperature value corresponding to this time, then this result is transferred to heating element heater 4 by data outputting module 35, makes it start heating.
The top in the space that front mould 1 and rear mold 2 form is connected with feeding pipe 7, feeding pipe 7 is provided with connector 8, connector 8 is provided with hanging member 9.And this feeding pipe 7 communicates with the gap between front mould 1 and rear mold 2, and melt is transported in the gap between front mould 1 and rear mold 2 from feeding pipe 7.The setting of hanging member 9 is convenient to whole die head to hang up, and hotting mask stream is then extruded from the die orifice being positioned at below and cools through chill roll 10.
During real work, melt is transported in the gap between front mould 1 and rear mold 2 from feeding pipe 7, PLC 3 controls each heating element heater 4 according to respective heating schedule melt heating, and melt flows out from die orifice and forms hotting mask stream, and namely hotting mask stream obtain film slab again after chill roll 10 cools.Because PLC 3 controls multiple temperature sensor 5 and multiple heating element heater 4 simultaneously, and multiple temperature sensor 5 can sense in real time to the temperature of the different piece of melt, heating element heater 4 can heat the melt near it again, thus comprehensive temperature measurement and control can be carried out to the melt flowed out from die orifice, thus film slab thickness distribution in a lateral direction can be upset artificially.
In a word, the present embodiment by connecting PLC 3 on each heating element heater 4 of extrusion die, make PLC 3 can control each heating element heater 4 respectively, to change the temperature of the melt in each region of extrusion die according to certain rule, and then change the viscosity of melt and the flow of unit interval in each region of extrusion die, finally can upset film slab thickness distribution in a lateral direction artificially, the thickness distribution controllability of film slab is strengthened.The cost of improvement of the present invention is very low, but can play good economic benefits.
It should be noted that, the present invention is only for PLC, but, PLC also can change other any industrial control unit (ICU)s into, as long as can realize controlling respectively several heating element heaters on extrusion die, the PLC in the present invention can be replaced as PC control (PC Base Control).That is, the PLC in the present invention is only an example, and it can't be construed as limiting protection scope of the present invention.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also carry out suitable change and amendment to above-mentioned embodiment.Therefore, the present invention is not limited to detailed description of the invention disclosed and described above, also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this description, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. for upsetting the method for the thickness distribution of the film slab extruded, it is characterized in that: PLC controls several heating element heaters be distributed on extrusion die respectively, to control the heating-up temperature of extrusion die to the melt of zones of different, thus control the viscosity of the melt of zones of different, the thickness of the melt flow that the final control unit interval is extruded from the zones of different of extrusion die and film slab, can upset the thickness distribution of the film slab extruded.
2. the method for the thickness distribution for upsetting the film slab extruded according to claim 1, is characterized in that: extrusion die often extrudes the long film slab of 5m ~ 500m, and namely PLC controls at least one heating element heater and change a heating-up temperature.
3. the method for the thickness distribution for upsetting the film slab extruded according to claim 1, is characterized in that: be transverse axis with time, be that the longitudinal axis builds temperature-time curve with temperature, each heating element heater temperature-time curve all not identical.
4. the method for the thickness distribution for upsetting the film slab extruded according to claim 1, is characterized in that: described heating-up temperature is 140 DEG C ~ 250 DEG C.
5. for upsetting the extrusion die of the thickness distribution of the film slab extruded, comprise with the front mould of front die lip and the rear mold with rear die lip, the die orifice of described front die lip and described rear die lip composition extruder, it is characterized in that: also comprise PLC, described front mould and described rear mold are provided with several heating element heaters and several temperature sensors, described heating element heater is connected with described temperature sensor, and described heating element heater is all connected with described PLC with described temperature sensor.
6. the extrusion die of the thickness distribution for upsetting the film slab extruded according to claim 5, is characterized in that: described front mould is connected by screw with described rear mold, by the aperture regulating described screw to regulate described die orifice.
7. the extrusion die of the thickness distribution for upsetting the film slab extruded according to claim 5, is characterized in that: described heating element heater is resistance wire, electric heating tube, Electrothermal ring, electric hot plate, electrical bar, mica fever tablet, microwave heating equipment or electromagnetic induction thermal.
8. the extrusion die of the thickness distribution for upsetting the film slab extruded according to claim 5, it is characterized in that: described temperature sensor is thermocouple and thermistor, and the end of probe of described temperature sensor and the melt contacts that flows through between described front mould and described rear mold.
9. the extrusion die of the thickness distribution for upsetting the film slab extruded according to claim 5, it is characterized in that, described PLC comprises:
Data memory module, for storing the heating schedule to individual heating element heater, described heating schedule is is transverse axis with time, take temperature as the temperature-time curve that the longitudinal axis builds;
Data read module, for reading the signal of described temperature sensor;
Data processing module, for processing the data read, obtains real-time temperature values;
Data comparison module, for comparing the temperature value that on real-time temperature values and temperature-time curve, this time is corresponding, and provides result;
Data outputting module, for result is outputted to described heating element heater:
If real-time temperature values is greater than temperature value corresponding to this time, then this result is transferred to described heating element heater by data outputting module, makes it suspend heating;
If real-time temperature values is less than temperature value corresponding to this time, then this result is transferred to described heating element heater by data outputting module, makes it start heating.
10. the extrusion die of the thickness distribution for upsetting the film slab extruded according to claim 5, it is characterized in that: the top in the space of described front mould and described rear mold composition is connected with feeding pipe, described feeding pipe is provided with connector, described connector is provided with hanging member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710300.9A CN104589629A (en) | 2014-11-29 | 2014-11-29 | Method and extrusion die head for disturbing thickness distribution of extruded thin film casting sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710300.9A CN104589629A (en) | 2014-11-29 | 2014-11-29 | Method and extrusion die head for disturbing thickness distribution of extruded thin film casting sheet |
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| Publication Number | Publication Date |
|---|---|
| CN104589629A true CN104589629A (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410710300.9A Pending CN104589629A (en) | 2014-11-29 | 2014-11-29 | Method and extrusion die head for disturbing thickness distribution of extruded thin film casting sheet |
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| CN (1) | CN104589629A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105109007A (en) * | 2015-09-16 | 2015-12-02 | 杭州福斯特光伏材料股份有限公司 | Two-channel feeding die head extrusion equipment |
| CN108466415A (en) * | 2018-05-04 | 2018-08-31 | 湖南烁普新材料有限公司 | Wet method diaphragm membrane preparation facilities and preparation method |
| CN113459370A (en) * | 2021-06-16 | 2021-10-01 | 广东金明精机股份有限公司 | Film stretching thickness control method |
| CN117160796A (en) * | 2023-10-30 | 2023-12-05 | 北京大学长三角光电科学研究院 | Slit coating die, slit coating device and coating control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105109007A (en) * | 2015-09-16 | 2015-12-02 | 杭州福斯特光伏材料股份有限公司 | Two-channel feeding die head extrusion equipment |
| CN108466415A (en) * | 2018-05-04 | 2018-08-31 | 湖南烁普新材料有限公司 | Wet method diaphragm membrane preparation facilities and preparation method |
| CN108466415B (en) * | 2018-05-04 | 2023-11-24 | 湖南烁普新材料有限公司 | Wet diaphragm membrane preparation device and preparation method |
| CN113459370A (en) * | 2021-06-16 | 2021-10-01 | 广东金明精机股份有限公司 | Film stretching thickness control method |
| CN117160796A (en) * | 2023-10-30 | 2023-12-05 | 北京大学长三角光电科学研究院 | Slit coating die, slit coating device and coating control method thereof |
| CN117160796B (en) * | 2023-10-30 | 2024-01-09 | 北京大学长三角光电科学研究院 | Slit coating die, slit coating device and coating control method thereof |
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