CN103624992A - Pressing device and method of polymer microstructure - Google Patents
Pressing device and method of polymer microstructure Download PDFInfo
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- CN103624992A CN103624992A CN201310591984.0A CN201310591984A CN103624992A CN 103624992 A CN103624992 A CN 103624992A CN 201310591984 A CN201310591984 A CN 201310591984A CN 103624992 A CN103624992 A CN 103624992A
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Abstract
The invention discloses a pressing device and a pressing method of a polymer microstructure. The pressing device comprises a sheet extrusion machine, a compression roller device capable of leveling and regulating thickness, and a mold press. The pressing method comprises the steps of directly entering slab pressing equipment after a polymer substrate is extruded from the extrusion machine; flattening the polymer substrate through rolling of two rollers and shaping preliminarily, carrying out rapid heating treatment on the surface of the polymer, and enabling the polymer substrate to enter a slab pressing mold when the temperature of the surface of the polymer substrate is higher than a glassy state or a melting point to press the microstructure. According to the pressing device and the pressing method, the microstructure slab pressing equipment is connected with the extrusion machine in series, so that abundant energy is saved, and the production efficiency is improved, meanwhile, with the slab pressing technology for preparing the polymer microstructure, enough pressure-maintaining cooling and shaping time, accurate cooling temperature and high geometric replication rate can be ensured and continuous large-scale high-efficiency industrial production for slab pressing can be realized.
Description
Technical field
The present invention relates to the continuous embossed former of a kind of polymer micro-structural and processing method, relate in particular to equipment and method that a kind of flat-plate compressed is printed standby polymer micro-structural, belong to technical field of polymer processing.
Background technology
Hot-forming script is a kind of traditional Machining Technology, is usually used in powder hot forming.Nineteen ninety-five, the people such as the Chou of Princeton University propose nanometer embossing, the making of the nanostructured that takes the lead in traditional hot extrusion briquetting technique to be applied to, i.e. so-called hot padding.The people such as Weber proposed hot-pressing technique to be applied to micro-manufacture field in 1996 subsequently.They think that micro-hot-pressing technique will be a kind ofly can produce in a large number the forming technique with accurate micro-structural, also mention in this way produced finished product may some defect simultaneously, as incomplete in filling, there is the problems such as contraction, warpage and surface roughness are large in finished product.
Because micro-hot-pressing technique has numerous advantages, along with the development of MEMS technology, this technology has obtained numerous scholars' attention, also emerges a large amount of achievements in research.Polymeric material has physics and chemical property quite widely, there is low cost simultaneously and be suitable for the many merits such as manufacture in enormous quantities, thereby along with the development of nanometer technique, the application of polymeric material in optics, chemistry, biology and micro electronmechanical field is more and more extensive.As micro-optics aspect: diffractive element (DOE), fiber waveguide group (Waveguide), microlens array (Micro lens array), the joints of optical fibre (Optical couple), LCD; Biomedical aspect: biochip (Bio-Chip), pcr amplification, DNA sequencing and detector etc.; Chemistry aspect: laboratory, micro-fluidic chip, micro-mixer (Micro-mixer) etc. on Capillary Electrophoresis (CE), sheet, and nano biological medical material.
The research of subfebrile temperature in pression technology be unable to do without Embosser, and the research and development of Embosser are also important aspects of technique, owing to being the micro-structural of manufacturing Nano grade, so hot padding forming machine is also had to strict especially requirement.
Mostly forming method for micro-embossing is dull and stereotyped hot stamp machine, nano marking press described in patent 200510019944.4, its principle is that the polymer matrix film under room temperature is fixed in the lower plate of hot stamp machine, and heating-cooling device and positioner are housed in lower plate.Impressing mould is fixed on upper plate, and heating-cooling device is also installed on it.During work, first the polymer matrix film being fixed in lower plate is heated, make it reach the needed temperature of impression, mould also will be heated to certain temperature, to guarantee polymer mold filling completely.Then upper substrate driven mold pressurizes to polymer matrix film, makes polymer-filled in impressing mould, and pressurize is carried out the demoulding after cooling a period of time, thereby completes time processing process.This method belongs to discontinuous formula and produces, infrabasal plate heating is cooling too frequent and speed is slow, and energy consumption is large, and the mobility of the polymer matrix film after post bake is difficult to reach desired degree, often cause graph copying low precision, micro-structural shifts imperfect.For this reason, invented a variety of mode of heatings and be used for improving the slow problem of heating cooling velocity, as the electromagnetic wave heating being used in patent 200410050075.7 etc., heating cooling effectiveness when these methods have improved hot padding, has saved molding time.Patent 2002131969.3 and patent 200510069953.4 have been invented a kind of thermal marking method pressurizeing with gas, equal pressure distribution character due to gas molecule, the homogeneity question of pressure distribution in the time of can solving hot padding, makes to impress area unrestricted, pressurization good uniformity.The production equipment of these methods more complicated all but, production efficiency is low, and the repeatable accuracy of product is poor.
In order to improve the above-mentioned shortcoming of dull and stereotyped thermal marking method, patent 200810068662.7, designed the continuous micro-embossing method of pulley type, basic principle is to adopt two synchronous rollers that rotate to complete the impression to polymer matrix film, one of them roller has micro-embossing mould, and polymer matrix film is by regulating two distances between roller to regulate the pressure being applied on polymer matrix film.This structure can realize continous way and produce, and while impressing, owing to being line contact, has reduced to impress the required power applying simultaneously, and Embosser distortion is little, has improved the uniformity of pressure distribution.But, when this kind of method is applied to polymer hot padding the dwell time short, microfabrication difficulty is large, can cause occurring elastic recovery phenomenon after polymer micro-structural shaping and demoulding, cannot guarantee the precision of graph copying.
Summary of the invention
One of object of the present invention is the shortcoming that overcomes existing pressure setting, a kind of pressure setting of polymer micro-structural is provided, this equipment is by the dull and stereotyped hot padding equipment of micro-structural and extruder assembled in series, avoided prior art middle plateform impressing mould to need the constantly cooling required complicated heating and cooling system of frequent heating, can save the energy, improve production efficiency, avoided simultaneously ordinary flat method for stamping when substrate carries out post bake due to the inhomogeneous stress deformation causing of being heated, mobility is inhomogeneous causes the problems such as mold filling is insufficient.
In order to achieve the above object, the technical solution used in the present invention is:
A pressure setting for polymer micro-structural, comprises the sheet extruder setting gradually, the press-roller device and the mould press that for carrying out flatness and thickness, regulate,
Described mould press is provided with mould bases, press moulding mechanism, pressing mold driving mechanism, horizontal mobile mechanism, horizontal drive mechanism and PLC control system, and described PLC control system is controlled described press moulding mechanism, pressing mold driving mechanism, horizontal mobile mechanism and horizontal drive mechanism;
Described horizontal mobile mechanism is provided with guide rail and slide block, and described guide rail is fixed on horizontal plane or basal plane, and described mould bases bottom is provided with slide block, and described slide block is assemblied in described guide rail;
Described horizontal drive mechanism is provided with drive motors and horizontally tracting screw mandrel, described drive motors drives described horizontally tracting screw mandrel motion, described horizontally tracting screw mandrel drives and is connected with described mould bases, and described horizontally tracting screw mandrel drives described mould bases to move along described guide rail;
Described press moulding mechanism is provided with cope match-plate pattern, lower bolster and guide pillar, and described lower bolster, described guide pillar are fixedly installed on described mould bases, and described cope match-plate pattern activity is assemblied in described guide pillar and described cope match-plate pattern and described lower bolster and matches;
Described pressing mold driving mechanism is provided with lift, and described lift is fixedly assemblied in described mould bases, and the drive end of described lift is fixedly connected with described cope match-plate pattern by float connector;
The output of described mould press is provided with traction wind-up roll, described press-roller device output is provided with nonstorage calorifier, in upper and lower template, be provided with cooling device, the polymer matrix film of extruding through sheet extruder passes between press-roller device two pressure rollers, then through being set around rolling carry-over pinch rolls between the upper and lower template of mould press after impression.
Above-mentioned drive motors is servomotor, and described horizontally tracting screw mandrel is set to ball screw, and servomotor is connected with mould bases by ball screw.
Between above-mentioned float connector and cope match-plate pattern, be provided with pressure sensor, described pressure sensor is connected with the described PLC control system signal of telecommunication.
Above-mentioned float connector is grouped into by upper part and bottom, and the lower end of upper part is provided with groove, and the bottom of groove is a plane, and the upper end of lower part is provided with the connector with upper part groove fit, and the top of this connector is a sphere.
In device of the present invention, flat-plate compressed die plate is mounted on high-precision mould bases, and after template is installed, the depth of parallelism of upper and lower two templates can reach 0.1-100 μ m, and the area of template can be square or rectangle.
In device of the present invention, on cope match-plate pattern or lower bolster, have micro-structural, the size characteristic of micro-structural includes but not limited to micro-fluidic chip, lenticule, deep trouth, V-type groove, polygon micro-structural.
In device of the present invention, having the runner to mold heated in template, can be water heating, the heating of hot pressing oil, Steam Heating, Hot-blast Heating for the material heating in runner.
In device of the present invention, the back and forth front and back advance and retreat process of impression motion up and down, Embosser of impression block is by the combination of servomotor and ball screw, by PLC, is programmed and is accurately controlled.
Another object of the present invention is need to frequently heat cooling die for the dull and stereotyped impression of micro-structural, heating cooling velocity is slow, can not guarantee the uniformity that polymeric matrix is heated, the shortcoming of can not continuity producing in enormous quantities, and it is short in micro-structural roll-in, to impress the dwell time, polymeric matrix mold filling is insufficient, the shortcoming that the low precision of microstructure replication rate is low, a kind of polymer micro-structural press working method is provided, polymer is from sheet material head is extruded, first thick by the smooth tune of two ganoid roller roll-ins, adopting polymer surfaces heating means that substrate one side or bilateral temperature are heated to rapidly to glass transition temperature or fusing point directly enters the flat-plate compressed printing apparatus with micro-structural when above and impresses and prepare micro-structural.The movement of substrate is under the traction of carry-over pinch rolls, and its speed is identical with the movement velocity of flat-plate compressed printing apparatus, and flat-plate compressed printing apparatus is can be reciprocating.
Utilize the basic processing method of above-mentioned pressure setting processable polymer, comprise the steps:
A, polymer principle are squeezed into the polymer matrix film of sheet by sheet extruder;
B, polymer substantially enter press-roller device and carry out flatness and thickness adjusting;
C, from press-roller device polymer matrix film out, input to nonstorage calorifier position, utilize nonstorage calorifier to adopt polymer surfaces heating means that polymer matrix film one side or bilateral temperature are heated to rapidly between the upper and lower template of mould press that glass transition temperature or fusing point be directly delivered to the flat board compacting with micro-structural when above to also cooling and shaping of compacting;
D, mould press, under the control of PLC control system, drive slide block driving whole mould bases to do along polymer-extruded direction along guide rail by driving mechanism and move, and are drawing the upper and lower template of compacting and are moving along polymer-extruded direction;
After mould press moves to desired location, it is stop motion, lift rotates backward, traction cope match-plate pattern is separated with lower bolster makes the polymer matrix film demoulding, after the polymer matrix film demoulding, moves forward and collected by traction wind-up roll under the traction of traction wind-up roll; Now driving mechanism rotates backward, and drives slide block driving whole mould bases to do along the opposite direction of polymer-extruded direction along guide rail and moves, and promotes imprinting apparatus and is returned to home position, enters the next impression cycle;
In the reciprocating motion speed of moulding process middle plateform imprinting apparatus and the speed of traction wind-up roll, be consistent, and in reciprocating motion process, impress pressure and remain unchanged.
Pressure limit in described step D is between 1-50KN, and the speed of traction wind-up roll is controlled at 0.5-5m/s.
In described step D, driving mechanism rotates backward, the return translational speed while driving slide block driving whole mould bases to do to move along the opposite direction of polymer-extruded direction along guide rail be moulding process translational speed 3-10 doubly.
Polymer surfaces heating means in described step C are flame heating.
Described polymer matrix film is PMMA, PC, PS, PP, PET, PA, PPS thermoplastic polymer; Or
Described polymer matrix film is the blend polymer of at least two kinds of formations in PMMA, PC, PS, PP, PET, PA, PPS thermoplastic polymer; Or
Described polymer matrix film is the composite that at least one and the inorganic material in PMMA, PC, PS, PP, PET, PA, PPS thermoplastic polymer forms;
Described polymer matrix film is single sheet or is multi-layer co-extruded sheet material.
Described upper and lower template is respectively equipped with the hot flow path to separately, and the distribution of hot flow path adopts S type to distribute to guarantee the uniformity of die plate temperature.
In method of the present invention, the pressing of substrate adjusts thick device to be comprised of two synchronous precompressed THICKNESS CONTROL rollers that rotate, and its roller spacing can fine adjustment, to guarantee that polymer matrix film carries out the evenly adjustable of thickness before micro-structural hot padding.
In method of the present invention, the spiral lift that pressure-driven system is comprised of a servomotor and ball screw, adopts high-precision ball screw and servomotor combination, realizes the accurate feedback of depth of indentation and controls.
In method of the present invention, the connection between ball screw and pressure sensor, is by a set of floating junction device, to guarantee to impress the uniformity of pressure, and impression pressure is controlled at 1-50KN.
In method of the present invention, the moulding process of polymer matrix film impressed before polymer-extruded rear temperature is higher than vitrifying inversion temperature, and impressing required heat is the waste heat after extruding.
Effect of the present invention: method of the present invention is to adopt polymer from head is extruded, by two roll-ins, print smooth adjustment thickness, by methods such as high temperature flame heating fast, heated polymerizable thing is surperficial rapidly, make its surface melting, directly enter flat-plate compressed printing apparatus and impress pressurize cooling and shaping, because polymer sheet is adjusted when thick by two rollers, sheet material inside is completely not cooling, avoided the stress deformation that in sheet material, external heat inhomogeneous cooling causes, the flatness of substrate and the uniformity of heat while having guaranteed impression.Simultaneously, the ordinary flat impression block energy loss that frequently the cooling sheet material of heating causes and low working (machining) efficiency have been saved, meanwhile, adopt flat-plate compressed printing apparatus of the present invention, can guarantee enough pressurize shaping times, accurate chilling temperature, how much replication rates are high, and prepared micro-structural precision is high, and die manufacturing cost is lower, the serialization industrial production that has realized the dull and stereotyped impression of polymer surfaces microstructure products, has greatly improved production efficiency.Because the low-grade fever platen press of this equipment is a kind of flexible processing method, it is particularly demonstrating huge commercial promise at micro-manufacture field aspect the processing of micro-fluidic chip, minitype radiator, biochip and micro-optical device.
Accompanying drawing explanation
Fig. 1 is the structural representation of the pressure setting of a kind of polymer micro-structural of the present invention;
Fig. 2 is the schematic flow sheet that the present invention impresses;
In figure: 1 is sheet extruder, 2 is press-roller device, and 3 is lift, 4 is drive end, 5 float connectors, and 6 is pressure sensor, 7 is mould bases, and 81 is cope match-plate pattern, and 82 is lower bolster, 9 is slide block, 10 is guide rail, and 11 is horizontally tracting screw mandrel, and 12 is drive motors, 13 is rolling carry-over pinch rolls, and 14 is polymer matrix film, guide pillar 16.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The pressure setting of a kind of polymer micro-structural of the present invention as shown in Figure 1, comprises the sheet extruder 1 setting gradually, the press-roller device 2 and the mould press that for carrying out flatness and thickness, regulate.
Mould press is provided with mould bases 7, press moulding mechanism, pressing mold driving mechanism, horizontal mobile mechanism, horizontal drive mechanism and PLC control system, and PLC control system is controlled the motion of described press moulding mechanism, pressing mold driving mechanism, horizontal mobile mechanism and horizontal drive mechanism.
Horizontal mobile mechanism is provided with guide rail 10 and slide block 9, and guide rail 10 is fixed on horizontal plane or basal plane, and mould bases 7 bottoms are provided with slide block 9, and slide block 9 is assemblied in guide rail 10.
Horizontal drive mechanism is provided with drive motors 12 and horizontally tracting screw mandrel 11, and drive motors 12 drives 11 motions of horizontally tracting screw mandrel, and horizontally tracting screw mandrel 11 drives and is connected with mould bases 7, and horizontally tracting screw mandrel 11 drives mould bases 7 to move along guide rail 10.Concrete, drive motors 12 is servomotor, and horizontally tracting screw mandrel 11 is set to ball screw, and servomotor is connected with mould bases 7 by ball screw.
Press moulding mechanism is provided with cope match-plate pattern 81, lower bolster 82 and guide pillar 16, and lower bolster 82, guide pillar 16 are fixedly installed on mould bases 7, and cope match-plate pattern 81 activities are assemblied in guide pillar 16 and cope match-plate pattern 81 matches with lower bolster 82.
Pressing mold driving mechanism is provided with lift 3, and lift 3 is fixedly assemblied in mould bases 7, and the drive end 4 of lift 3 is fixedly connected with cope match-plate pattern 81 by float connector 5.Float connector 5 is grouped into by upper part and bottom, and the lower end of upper part is provided with groove, and the bottom of groove is a plane, and the upper end of lower part is provided with the connector with upper part groove fit, and the top of this connector is a sphere.Between float connector 5 and cope match-plate pattern 81, be also provided with pressure sensor 6, pressure sensor 6 is connected with the PLC control system signal of telecommunication.
The output of mould press is provided with traction wind-up roll, press-roller device 2 outputs are provided with nonstorage calorifier, in upper and lower template 82, be provided with cooling device, the polymer matrix film 14 of extruding through sheet extruder 1 passes between 2 liang of pressure rollers of press-roller device, then through being set around rolling carry-over pinch rolls 13 between the upper and lower template 82 of mould press after impression.
By the pressure setting of this polymer micro-structural, polymer from sheet extruder 1 after accurate sheet material head is extruded, enter leveling and adjust thick press-roller device 2, press-roller device 2 is controlled the thickness of polymer matrix film 14, makes substrate reach good flatness by roll-in simultaneously.Polymer matrix film 14 after pressing tune is thick enters dull and stereotyped imprinting apparatus, and the drive end 4 of lift 3 moves downward pushing cope match-plate pattern 81 and moves down impression micro-structural along guide pillar 16; The drive end 4 of lift 3 is a set of float connectors 5 with the jockey of pressure sensor 6, and float connector 55 can guarantee the stressed uniformity of mould bases 7 templates in moulding process.Pressure sensor 6 is preferably set to radial pressure sensor 6, can accurately measure the pressure of impression, measurement category is 0-50KN, thereby can realize the accurate control of impression pressure, can control by adjusting the temperature of polymer matrix film 14 and the size of impression pressure the depth of indentation of micro-structural template simultaneously.A whole set of dull and stereotyped imprinting apparatus is to move under the control of PLC, is arranged on substrate, and is moved reciprocatingly on guide rail 10 by horizontally tracting screw mandrel and driven by servomotor slide block 9 by slide block 9, guide rail 10.Drive motors and horizontally tracting screw mandrel are drawing dull and stereotyped imprinting apparatus and are doing reciprocating along polymer-extruded direction, and the reciprocating motion speed of moulding process middle plateform imprinting apparatus and rolling carry-over pinch rolls 13 speed are consistent, and hauling speed is controlled at 0.5-5m/s.
Adopt the pressure setting of this polymer micro-structural of the present invention to carry out continuous embossed method and principle as shown in Figure 2: after polymer matrix film 14 adjusts thick press-roller device 2 out from leveling, enter that flat-plate compressed stamps, lower bolster 82(is shown in Fig. 2 A); Lift 3 drives cope match-plate pattern to move downward, and cope match-plate pattern 81 and lower bolster 82 are coordinated, and polymer matrix film 14 is impressed to (seeing Fig. 2 B); Upper and lower template 82 coordinates after impression, and servomotor and horizontally tracting screw mandrel drive Embosser to move (seeing Fig. 2 C) along extruding direction, impress pressure and remain unchanged in this process, and controlled range is between 0-50KN, and movement velocity is controlled at 0.5-5 m/s; Moving to behind appropriate location is stop motion, and now, lift 3 rotates backward, and traction cope match-plate pattern 81 is separated with lower bolster 82, makes polymer matrix film 14 be able to the demoulding (seeing Fig. 2 D); Polymer matrix film 14, from the press moulding mechanism demoulding, moves forward and is collected under the traction of traction wind-up roll; Now servomotor rotates backward, doubly, device is done quick return to the 3-10 that this return process translational speed is moulding process translational speed, promotes imprinting apparatus and is returned to home position (seeing Fig. 2 E), enter the next impression cycle, realize the continuity of the dull and stereotyped impression of micro-structural and carry out.
The present invention adopts polymer from head is extruded, by two roll-ins, print smooth adjustment thickness, by methods such as high temperature flame heating fast, heated polymerizable thing surface, makes its surface melting rapidly, directly enters flat-plate compressed printing apparatus and impresses pressurize cooling and shaping, because polymer sheet is adjusted when thick by two rollers, sheet material inside is completely not cooling, has avoided the stress deformation that in sheet material, external heat inhomogeneous cooling causes, the flatness of substrate and the uniformity of heat while having guaranteed impression.Simultaneously, the ordinary flat impression block energy loss that frequently the cooling sheet material of heating causes and low working (machining) efficiency have been saved, meanwhile, adopt flat-plate compressed printing apparatus of the present invention, can guarantee enough pressurize shaping times, accurate chilling temperature, how much replication rates are high, and prepared micro-structural precision is high, and die manufacturing cost is lower, the serialization industrial production that has realized the dull and stereotyped impression of polymer surfaces microstructure products, has greatly improved production efficiency.Because the low-grade fever platen press of this equipment is a kind of flexible processing method, it is particularly demonstrating huge commercial promise at micro-manufacture field aspect the processing of micro-fluidic chip, minitype radiator, biochip and micro-optical device.
embodiment 2
The processing method that processable polymer is basic, adopts pressure setting as described in Example 1 to process, and specifically comprises the steps:
A, polymer principle are squeezed into the polymer matrix film of sheet by sheet extruder;
B, polymer substantially enter press-roller device and carry out flatness and thickness adjusting;
C, from press-roller device polymer matrix film out, input to nonstorage calorifier position, utilize nonstorage calorifier to adopt polymer surfaces heating means that polymer matrix film one side or bilateral temperature are heated to rapidly between the upper and lower template of mould press that glass transition temperature or fusing point be directly delivered to the flat board compacting with micro-structural when above to also cooling and shaping of compacting;
D, mould press, under the control of PLC control system, drive slide block driving whole mould bases to do along polymer-extruded direction along guide rail by driving mechanism and move, and are drawing the upper and lower template of compacting and are moving along polymer-extruded direction;
After mould press moves to desired location, it is stop motion, lift rotates backward, traction cope match-plate pattern is separated with lower bolster makes the polymer matrix film demoulding, after the polymer matrix film demoulding, moves forward and collected by traction wind-up roll under the traction of traction wind-up roll; Now driving mechanism rotates backward, and drives slide block driving whole mould bases to do along the opposite direction of polymer-extruded direction along guide rail and moves, and promotes imprinting apparatus and is returned to home position, enters the next impression cycle;
In the reciprocating motion speed of moulding process middle plateform imprinting apparatus and the speed of traction wind-up roll, be consistent, and in reciprocating motion process, impress pressure and remain unchanged.
Wherein, polymer matrix film is PMMA, PC, PS, PP, PET, PA, PPS thermoplastic polymer; Or polymer matrix film is the blend polymer of at least two kinds of formations in PMMA, PC, PS, PP, PET, PA, PPS thermoplastic polymer; Or polymer matrix film is the composite that at least one and the inorganic material in PMMA, PC, PS, PP, PET, PA, PPS thermoplastic polymer forms.Polymer matrix film is single sheet or is multi-layer co-extruded sheet material.
Wherein, the polymer surfaces heating means in step C are flame heating.
Pressure limit in step D is between 1-50KN, and the speed of traction wind-up roll is controlled at 0.5-5m/s.
In step D, driving mechanism rotates backward, the return translational speed while driving slide block driving whole mould bases to do to move along the opposite direction of polymer-extruded direction along guide rail be moulding process translational speed 3-10 doubly.
Upper and lower template is respectively equipped with the hot flow path to separately, and the distribution of hot flow path adopts S type to distribute to guarantee the uniformity of die plate temperature.
In the present invention, the pressing of substrate adjusts thick device to be comprised of two synchronous precompressed THICKNESS CONTROL rollers that rotate, and its roller spacing can fine adjustment, to guarantee that polymer matrix film carries out the evenly adjustable of thickness before micro-structural hot padding.
In the present invention, the spiral lift that pressure-driven system is comprised of a servomotor and ball screw, adopts high-precision ball screw and servomotor combination, realizes the accurate feedback of depth of indentation and controls.
In the present invention, the connection between ball screw and pressure sensor, is by a set of floating junction device, to guarantee to impress the uniformity of pressure, and impression pressure is controlled at 1-50KN.
In the present invention, the moulding process of polymer matrix film impressed before polymer-extruded rear temperature is higher than vitrifying inversion temperature, and impressing required heat is the waste heat after extruding.
The present invention adopts polymer from head is extruded, by two roll-ins, print smooth adjustment thickness, by methods such as high temperature flame heating fast, heated polymerizable thing surface, makes its surface melting rapidly, directly enters flat-plate compressed printing apparatus and impresses pressurize cooling and shaping, because polymer sheet is adjusted when thick by two rollers, sheet material inside is completely not cooling, has avoided the stress deformation that in sheet material, external heat inhomogeneous cooling causes, the flatness of substrate and the uniformity of heat while having guaranteed impression.Simultaneously, the ordinary flat impression block energy loss that frequently the cooling sheet material of heating causes and low working (machining) efficiency have been saved, meanwhile, adopt flat-plate compressed printing apparatus of the present invention, can guarantee enough pressurize shaping times, accurate chilling temperature, how much replication rates are high, and prepared micro-structural precision is high, and die manufacturing cost is lower, the serialization industrial production that has realized the dull and stereotyped impression of polymer surfaces microstructure products, has greatly improved production efficiency.Because the low-grade fever platen press of this equipment is a kind of flexible processing method, it is particularly demonstrating huge commercial promise at micro-manufacture field aspect the processing of micro-fluidic chip, minitype radiator, biochip and micro-optical device.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although the present invention is explained in detail with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. a sheet material press device for polymer micro-structural, comprises the sheet extruder setting gradually, the press-roller device and the mould press that for carrying out flatness and thickness, regulate, it is characterized in that:
Described mould press is provided with mould bases, press moulding mechanism, pressing mold driving mechanism, horizontal mobile mechanism, horizontal drive mechanism and PLC control system, and described PLC control system is controlled described press moulding mechanism, pressing mold driving mechanism, horizontal mobile mechanism and horizontal drive mechanism;
Described horizontal mobile mechanism is provided with guide rail and slide block, and described guide rail is fixed on horizontal plane or basal plane, and described mould bases bottom is provided with slide block, and described slide block is assemblied in described guide rail;
Described horizontal drive mechanism is provided with drive motors and horizontally tracting screw mandrel, described drive motors drives described horizontally tracting screw mandrel motion, described horizontally tracting screw mandrel drives and is connected with described mould bases, and described horizontally tracting screw mandrel drives described mould bases to move along described guide rail;
Described press moulding mechanism is provided with cope match-plate pattern, lower bolster and guide pillar, and described lower bolster, described guide pillar are fixedly installed on described mould bases, and described cope match-plate pattern activity is assemblied in described guide pillar and described cope match-plate pattern and described lower bolster and matches;
Described pressing mold driving mechanism is provided with lift, and described lift is fixedly assemblied in described mould bases, and the drive end of described lift is fixedly connected with described cope match-plate pattern by float connector;
The output of described mould press is provided with traction wind-up roll, described press-roller device output is provided with nonstorage calorifier, in upper and lower template, be provided with cooling device, the polymer matrix film of extruding through sheet extruder passes between press-roller device two pressure rollers, then through being set around rolling carry-over pinch rolls between the upper and lower template of mould press after impression.
2. the sheet material press device of polymer micro-structural according to claim 1, is characterized in that: described drive motors is servomotor, and described horizontally tracting screw mandrel is set to ball screw, and servomotor is connected with mould bases by ball screw.
3. the sheet material press device of polymer micro-structural according to claim 1, is characterized in that: between described float connector and cope match-plate pattern, be provided with pressure sensor, described pressure sensor is connected with the described PLC control system signal of telecommunication.
4. the sheet material press device of polymer micro-structural according to claim 3, it is characterized in that: described float connector is grouped into by upper part and bottom, the lower end of upper part is provided with groove, the bottom of groove is a plane, the upper end of lower part is provided with the connector with upper part groove fit, and the top of this connector is a sphere.
5. utilize the basic processing method of sheet material press device processable polymer described in claim 1, it is characterized in that comprising the steps:
A, polymer principle are squeezed into the polymer matrix film of sheet by sheet extruder;
B, polymer substantially enter press-roller device and carry out flatness and thickness adjusting;
C, from press-roller device polymer matrix film out, input to nonstorage calorifier position, utilize nonstorage calorifier to adopt polymer surfaces heating means that polymer matrix film one side or bilateral temperature are heated to rapidly between the upper and lower template of mould press that glass transition temperature or fusing point be directly delivered to the flat board compacting with micro-structural when above to also cooling and shaping of compacting;
D, mould press, under the control of PLC control system, drive slide block driving whole mould bases to do along polymer-extruded direction along guide rail by driving mechanism and move, and are drawing the upper and lower template of compacting and are moving along polymer-extruded direction;
After mould press moves to desired location, it is stop motion, lift rotates backward, traction cope match-plate pattern is separated with lower bolster makes the polymer matrix film demoulding, after the polymer matrix film demoulding, moves forward and collected by traction wind-up roll under the traction of traction wind-up roll; Now driving mechanism rotates backward, and drives slide block driving whole mould bases to do along the opposite direction of polymer-extruded direction along guide rail and moves, and promotes imprinting apparatus and is returned to home position, enters the next impression cycle;
In the reciprocating motion speed of moulding process middle plateform imprinting apparatus and the speed of traction wind-up roll, be consistent, and in reciprocating motion process, impress pressure and remain unchanged.
6. processing method according to claim 5, is characterized in that: the pressure limit in described step D is between 1-50KN, and the speed of traction wind-up roll is controlled at 0.5-5m/s.
7. processing method according to claim 5, it is characterized in that: in described step D, driving mechanism rotates backward, the return translational speed while driving slide block driving whole mould bases to do to move along the opposite direction of polymer-extruded direction along guide rail be moulding process translational speed 3-10 doubly.
8. processing method according to claim 5, is characterized in that: the polymer surfaces heating means in described step C are flame heating.
9. processing method according to claim 5, is characterized in that: described polymer matrix film is PMMA, PC, PS, PP, PET, PA, PPS thermoplastic polymer; Or
Described polymer matrix film is the blend polymer of at least two kinds of formations in PMMA, PC, PS, PP, PET, PA, PPS thermoplastic polymer; Or
Described polymer matrix film is the composite that at least one and the inorganic material in PMMA, PC, PS, PP, PET, PA, PPS thermoplastic polymer forms;
Described polymer matrix film is single sheet or is multi-layer co-extruded sheet material.
10. processing method according to claim 5, is characterized in that: described upper and lower template is respectively equipped with the hot flow path to separately, and the distribution of hot flow path adopts S type to distribute to guarantee the uniformity of die plate temperature.
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