CN105523707B - A kind of micro-structure sintered-carbide die and its hot pressing micro shaping manufacturing method - Google Patents
A kind of micro-structure sintered-carbide die and its hot pressing micro shaping manufacturing method Download PDFInfo
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- CN105523707B CN105523707B CN201511034974.2A CN201511034974A CN105523707B CN 105523707 B CN105523707 B CN 105523707B CN 201511034974 A CN201511034974 A CN 201511034974A CN 105523707 B CN105523707 B CN 105523707B
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- hot pressing
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B20/00—Processes specially adapted for the production of quartz or fused silica articles, not otherwise provided for
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Abstract
The invention discloses a kind of micro-structure sintered-carbide dies, it include the hard alloy mold core with very low power, it is set in parallel micro-cannelure array on the machined surface of the hard alloy mold core with very low power, the hard alloy mold core with very low power is the machined surface hard alloy mold core in curved surface with curved surface very low power, the micro-cannelure array is set in parallel on the curved surface, or, the hard alloy mold core with very low power is the hard alloy mold core with plane very low power that machined surface is in plane, and the micro-cannelure array is set in parallel on the plane.The invention also discloses a kind of hot pressing micro shaping manufacturing methods of micro-structure sintered-carbide die.The workpiece micro-structure surface of the invention worked it out is smooth, precision is high and simple for process, long lifespan, reduces hot-forming pressure load, improve the formed precision and consistency of micro-structure, promote the extensive practicability of optical component of quartz glass, reduces manufacturing cost, energy-saving and emission-reduction.
Description
Technical field
The present invention relates to a kind of hot-forming micro-mould and micrometer-nanometer processing technology fields, and in particular to a kind of micro-structure is hard
Matter alloy mold and its hot pressing micro shaping manufacturing method.
Background technology
Now, silica glass material is widely used due to surface progress microstructure design can play optical property very well,
But because it is hard brittle material, machining process is used merely, progress ductile regime machining is needed just to can guarantee its transparent and mirror
Face effect, but the time of ductile regime machining is extremely long, does not meet the needs of optical component of quartz glass actual production, there is an urgent need to
A kind of technique promotes the optical element performance of quartz glass.Hot pressing micro shaping as a kind of micro molding process, have product material,
Geometry and size adaptability are good, at low cost, efficient, and can the series of advantages such as serialization, automated production, be big
The important development direction of scale manufacturing microminiature product.
The micro-mould of hot pressing micro shaping is because its cavity and channel size cross over macro-micro range scale, by dimensional effect
Influence, the flowing, heat transfer of melt are all different under macro-scale in forming process, and to the temperature of mold, the ventilation of cavity is arranged
The demoulding pickup etc. of gas, micro- plastic has particular/special requirement, traditional mold design theory and method to be designed in micro injection molding die
In no longer be applicable in, mainly include die temperance control system, exhaust system and ejection system.In micro injection molding, because of mold cavity
Surface to volume ratio is big, causes melt temperature big in filling phase change range, seriously affects the Forming Quality of micro- plastic
And molding cycle, therefore, micro-mould usually requires design dynamic mold temperature control system.Since micro-mould surface processing accuracy is high, when
After mold clamping, the gap very little between dynamic model and cover half, remaining air and the gas of melt release are difficult from type in cavity
Cavity gap is completely exhausted out, this can influence melt filling rate and micro- plastic parts moulding quality, therefore micro-mould will design vacuum exhaust system
System.Due to the demoulding mechanism that micro- plastic part quality is light, wall is thin, intensity is low, traditional, i.e., the pushing method that mandril is in direct contact with plastic
Micro-structure can be destroyed, the Forming Quality of micro- plastic is seriously affected, therefore designs rational micro- plastic pushing method.
In addition, currently used minisize mould production method, is combined with electrocasting using MEMS technology, by photoetching and is waited
Plasma etching realizes the preparation of micro-structure, has high-precision, the advantage of mass.But equipment is expensive, and mould machine intensity is low,
Service life is shorter.
Invention content
For above various problems, on the basis of having designed micro-structure hard alloy micro-mould injection molding, this
Invention devises a kind of micro-structure sintered-carbide die and its hot pressing micro shaping manufacturing method.
The technical solution adopted by the present invention is as follows：
A kind of micro-structure sintered-carbide die includes the hard alloy mold core with very low power, the hard with very low power
Micro-cannelure array it has been set in parallel on the machined surface of alloy mold core, the micro-cannelure array is used to form after hot pressing on finished parts
Micro-structure.
Further, the hard alloy mold core with very low power is the machined surface hard in curved surface with curved surface very low power
Alloy mold core, the micro-cannelure array are set in parallel on the curved surface, machined surface are set as curved surface, its object is to bases
Research, using the favorable optical performance of quartz glass, by the marking to quartz glass of very low power mold core, forming concave surface very low power
Quartz glass has guide-lighting more efficient, brightness higher and the spies such as evenly that shine compared to common quartz glass tablet now
Point increases optical property.
Further, the subsequent corrosion is 200 ~ 600mm
Further, the groove angle of the micro-cannelure array is 10 ° ~ 120 °, and gash depth is 0.1mm ~ 0.6mm,
0.5mm ~ 0.9mm is divided between groove.
Further, the hard alloy mold core with very low power is the hard with plane very low power that machined surface is in plane
Alloy mold core, the micro-cannelure array are set in parallel on the plane, are marked onto quartz glass by very low power mold core,
Form plane very low power quartz glass.
Further, the groove angle of the micro-cannelure array is 10 ° ~ 120 °, and gash depth is 0.1mm ~ 0.6mm,
0.5mm ~ 0.9mm is divided between groove.
Further, the micro-cannelure array is process by the skive after modifying, at low cost, simple for process.
A kind of hot pressing micro shaping manufacturing method of such as micro-structure sintered-carbide die, including step：
1) it is mounted in the upper molding of heat pressing forming machines, is led to by the hard alloy mold core with very low power described in cope plate
It crosses lower template quartz glass workpiece is fixed in the lower molding of heat pressing forming machines；
2) the hard alloy mold core with curved surface very low power is heated to 700 DEG C ~ 800 according to preset cope plate temperature parameter
℃；；
3) the upper and lower mould molding of heat pressing forming machines, and the hot pressing chamber vacuumize process to being formed after molding, form vacuum
Chamber, it is therefore intended that prevent due to enabling the aeration quartz glass generated in melten glass pressurized process during hot pressing micro shaping
Workpiece surface very low power quality ensures that the bubble generated is pulled away by vacuum chamber at the first time, improves hot-forming surface matter
Dose-effect fruit；
4) to quartz glass workpiece after the heat pressing forming machines pressurize according to preset pressure value and hot pressing time value
Carry out hot pressing processing；
6）After the completion of hot pressing after pressurize 1s ~ 5s, you can demoulding and part.
Further, the predetermined temperature value is 700 DEG C ~ 800 DEG C.
Further, hot pressing pressure value is 20Mpa ~ 40Mpa, and hot pressing time value is 1s ~ 5s.
Compared with prior art, the present invention has the following advantages that compared with prior art：
（1）Compared with common heat pressing and molding mold, hot pressing micro shaping by temperature, pressure, the dwell time, the ginsengs such as vacuumize
Number control, accurate hot pressing micro shaping condition determines the parameter area of high-precision modeling, to ensure quartz glass workpiece surface matter
Amount, it is easy to accomplish extensive manufacture and laboratory process research.
（2）The micro-structure with specific shape can be made in workpiece surface using the skive after finishing, with
Processing method based on photoetching, etching is low, simple for process compared to equipment cost.The higher material of the plastic hardness of skive
Material.
（3）The workpiece micro-structure surface worked it out is smooth, precision is high.
（4）Plane or curved surface, mean camber very low power structure, which is arranged, in hot pressing machined surface to drive quartz glass very well successively
Molding, reduces hot-forming pressure load, improves the formed precision and consistency of micro-structure.
（5）Promote the extensive practicability of optical component of quartz glass, reduce manufacturing cost, very low power design can enhance section
It can emission reduction effect.
Description of the drawings
Fig. 1 is the hard alloy mold core schematic three dimensional views with curved surface very low power.
Fig. 2 is the hard alloy mold core schematic three dimensional views with plane very low power.
Fig. 3 is the hard alloy mold core schematic front view with curved surface very low power.
Fig. 4 is the hard alloy mold core schematic front view with plane very low power.
Fig. 5 is hot pressing micro molding process flow diagram.
Fig. 6 is the hot-press arrangement partial schematic diagram of the hard alloy mold core hot pressing micro shaping workpiece with curved surface very low power.
Fig. 7 is the hot-press arrangement partial schematic diagram of the hard alloy mold core hot pressing micro shaping workpiece with plane very low power.
Fig. 8 is the microcosmic schematic diagram of hot pressing micro shaping principle.
As shown in the figure：Hard alloy mold cores of the 1- with curved surface very low power；2- groove angles；3- gash depths；Between 4- grooves
Every；5- subsequent corrosions；The upper molding of 6- heat pressing forming machines；The lower molding of 7- heat pressing forming machines；8- quartz glass workpiece；9- hot pressing
Machine pressure；10- lower templates；11- vacuum chambers；12- cope plates；Masterplate temperature control module on 13- hot presses；14- temperature distortions region；
Hard alloy mold cores of the 15- with plane very low power.
Specific implementation mode
To be best understood from the present invention, the present invention is described further with reference to the accompanying drawings and examples, but this hair
Bright claimed range is not limited to the range of embodiment expression.
Embodiment one
As shown in figures 1 and 3, a kind of micro-structure sintered-carbide die includes the hard alloy mold core with very low power, described
Include the hard alloy mold core with very low power be the machined surface hard alloy mold core 1 in curved surface with curved surface very low power, it is described micro-
Groove array is set in parallel on the curved surface, and the subsequent corrosion 5 is R=400mm, and the groove of the micro-cannelure array presss from both sides
Angle 2 is θ=70 °, and gash depth 3 is h=0.4mm, and groove interval 4 is a=0.7mm.
The micro-cannelure array is used to form the micro-structure on finished parts after hot pressing, wherein the hard with curved surface very low power closes
The machined surface of golden mold core 1 be curved surface, its object is to root it was found that using quartz glass favorable optical performance, pass through curved surface
In the marking to quartz glass of very low power mold core, concave surface very low power quartz glass is formed, compared to common quartz glass tablet now, tool
The features such as having guide-lighting more efficient, brightness higher and shining evenly, increase optical property.
Embodiment two
As shown in Figure 2 and Figure 4, a kind of micro-structure sintered-carbide die includes the hard alloy mold core with very low power, described
Hard alloy mold core with very low power is the hard alloy mold core (15) with plane very low power that machined surface is in plane, micro- ditch
Be arranged on the plane to slot array parallel, the groove angle 2 of the micro-cannelure array is θ=50 °, gash depth 3 be h=
0.6mm, groove interval 4 are a=0.9mm；
The micro-cannelure array of above-described embodiment is process by the skive after modifying, specifically, processing curve
When micro-cannelure array, the hard alloy mold core 1 with curved surface very low power for wearing into predetermined size and surface roughness is clipped in first
On vice, vice is fixed on magnetic force platform, uses the skive of the coarseness trimmed in band curved surface after mixing up position
By curved surface forming algorithm on 1 curved surface of hard alloy mold core of very low power, wheel face shape has been provided using the grinding of three travelling wheelhead roll grinders
Then thick workpiece after molding in same orientation, essence is carried out using fine-grained skive by the micro-structure of shape
Mill, processes more smooth surface.
The skive of the coarseness is made of diamond abrasive and bronze binding agent, and diamond abrasive granularity is 60
~ 200 mesh；The fine-grained grinding wheel is made of diamond abrasive and resinoid bond, diamond abrasive granularity 1500 ~ 4000
Mesh.Grinding wheel speed is 2000 ~ 5000 revs/min；In the thick molding process of micro-structure, grinding wheel feeding depth be 10 ~ 40 microns/
Per stroke, feed speed is 5 ~ 30mm/min；Finish molding feeding depth be 1 ~ 10 micron/per stroke, feed speed 1
~5mm/min。
Embodiment three
As shown in Fig. 6 and Fig. 7 and Fig. 8, a kind of hot pressing micro shaping manufacturing method of such as micro-structure sintered-carbide die,
Including step：
1) by cope plate 12 by the hard alloy mold core 1 with curved surface very low power or the hard with plane very low power
Alloy mold core 15 is mounted in the upper molding 6 of heat pressing forming machines, is fixed on quartz glass workpiece 8 by lower template 10 and is hot pressed into
In the lower molding 7 of type machine；
2) according to 12 temperature parameter of preset cope plate by the hard alloy mold core 1 with curved surface very low power or with the micro- ditch of plane
The hard alloy mold core 15 of slot is heated to 700 ° ~ 800 °, and the predetermined temperature value is 750 °, this is by masterplate on hot press
Temperature control module 13 is realized；
3) the upper and lower mould molding of heat pressing forming machines, and the hot pressing chamber vacuumize process to being formed after molding, it is therefore intended that
It prevents due to enabling 8 surfaces of aeration quartz glass workpiece generated in melten glass pressurized process micro- during hot pressing micro shaping
Groove quality ensures that the bubble generated is pulled away by vacuum chamber at the first time, improves hot-forming surface quality effect；
4) to quartz glass workpiece 8 after the heat pressing forming machines pressurize according to preset pressure value and hot pressing time value
Hot pressing processing (see Fig. 6 and Fig. 7) is carried out, the hot pressing pressure value is 20Mpa ~ 40Mpa, and hot pressing dwell time value is 3s, and band is bent
The hard alloy mold core 1 of face very low power or 15 machined surface of hard alloy mold core with plane very low power and quartz glass workpiece 8 exist
Under the action of hot press pressure 9, keep 8 temperature distortion of quartz glass workpiece formation micro- with the curved surface micro-cannelure array or with plane
The corresponding temperature distortion region of groove array 14（See Fig. 8）；
6）After the completion of hot pressing after pressurize 1s ~ 5s, you can demoulding and part.
The hot pressing micro shaping manufacturing method of the present embodiment, relative to common heat pressing and molding mold, hot pressing micro shaping passes through temperature
Degree, the dwell time, state modulators, the accurate hot pressing micro shaping condition such as vacuumizes and determines the parameter model of high-precision modeling pressure
It encloses, to ensure quartz glass workpiece surface quality, it is easy to accomplish extensive manufacture and laboratory process research.The band micro- ditch of curved surface
The hard alloy mold core 1 of slot or hard alloy mold core 15 with plane very low power can utilize the skive after finishing can be with
Produce the micro-structure with specific shape in workpiece surface, compared with the processing method based on photoetching, etching equipment cost it is low,
It is simple for process.The higher material of the plastic hardness of skive, i.e. cemented carbide material；Hot pressing micro shaping manufacturing method energy institute
The workpiece micro-structure surface worked it out is smooth, precision is high.And plane or curved surface, mean camber very low power knot is arranged in hot pressing machined surface
Structure can drive quartz glass to be molded successively very well, reduce hot-forming pressure load, improve the formed precision and one of micro-structure
Cause property.The present invention promotes the extensive practicability of optical component of quartz glass, reduces manufacturing cost, and very low power design can enhance section
It can emission reduction effect.
The above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to the present invention
Embodiment restriction.For those of ordinary skill in the art, it can also make on the basis of the above description
Other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all the present invention
All any modification, equivalent and improvement etc., should be included in the protection of the claims in the present invention made by within spirit and principle
Within the scope of.
Claims (5)
1. a kind of micro-structure sintered-carbide die, it is characterised in that：Quartz glass is processed to form very low power including being used for hot pressing
Quartz glass workpiece and hard alloy mold core with very low power, it is parallel on the machined surface of the hard alloy mold core with very low power
Ground is provided with micro-cannelure array；The micro-cannelure array is set on the machined surface of the hard alloy mold core with very low power, institute
It is in planar or curved to state machined surface, and the groove angle of the micro-cannelure array is 10 ° -120 °, gash depth 0.1mm-
0.6mm is divided into 0.5mm-0.9mm between groove；The very low power depth of the very low power quartz glass workpiece is less than the very low power
The gash depth of array.
2. micro-structure sintered-carbide die according to claim 1, it is characterised in that：The subsequent corrosion is 200-
600mm。
3. micro-structure sintered-carbide die according to any one of claim 1 to 2, it is characterised in that：The very low power
Array is process by the skive after modifying.
4. a kind of hot pressing micro shaping manufacturing method of the micro-structure sintered-carbide die as described in any one of claim 1-3,
It is characterized in that, including step：
1) the hard alloy mold core with very low power is mounted on to the upper molding (6) of heat pressing forming machines by cope plate (12)
On, quartz glass workpiece (8) is fixed in the lower molding (7) of heat pressing forming machines by lower template (10)；
2) the hard alloy mold core (1) with curved surface very low power is heated to 700 according to preset cope plate (12) temperature parameter
℃-800℃；
3) the upper and lower mould molding of heat pressing forming machines, and the hot pressing chamber vacuumize process to being formed after molding, form vacuum chamber
(11)；
4) heat pressing forming machines pressurize according to preset pressure value and dwell time value, to quartz glass workpiece
(8) hot pressing micro shaping processing is carried out；
5) after the completion of hot pressing after pressurize ls-5s, you can demoulding and part.
5. hot pressing micro shaping manufacturing method according to claim 4, it is characterised in that：Hot pressing pressure value is 20Mpa-
40Mpa, hot pressing time value are ls-5s.
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| CN201511034974.2A CN105523707B (en) | 2015-12-31 | 2015-12-31 | A kind of micro-structure sintered-carbide die and its hot pressing micro shaping manufacturing method |
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| CN201511034974.2A CN105523707B (en) | 2015-12-31 | 2015-12-31 | A kind of micro-structure sintered-carbide die and its hot pressing micro shaping manufacturing method |
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| CN105523707A CN105523707A (en) | 2016-04-27 |
| CN105523707B true CN105523707B (en) | 2018-11-02 |
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| CN112904666B (en) * | 2021-01-22 | 2024-06-11 | 佛山科学技术学院 | High aspect ratio microstructure array mold core, processing device and manufacturing method |
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| CN102343528A (en) * | 2011-09-23 | 2012-02-08 | 华南理工大学 | Micro-forming mirror plane with micro conical tower quartz lens array and processing method thereof |
| CN104849796A (en) * | 2015-03-19 | 2015-08-19 | 华南理工大学 | Micro-lens array light guide plate with adaptive spacing |
| CN104944743A (en) * | 2014-03-25 | 2015-09-30 | 郭作超 | Forming method of far-infrared glass globe lens blank |
| CN205616774U (en) * | 2015-12-31 | 2016-10-05 | 华南理工大学 | Micro -structure carbide die |
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2015
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|---|---|---|---|---|
| CN1405104A (en) * | 1995-07-18 | 2003-03-26 | 松下电器产业株式会社 | Optical element, optical-element formation mould and method thereof |
| CN102343528A (en) * | 2011-09-23 | 2012-02-08 | 华南理工大学 | Micro-forming mirror plane with micro conical tower quartz lens array and processing method thereof |
| CN104944743A (en) * | 2014-03-25 | 2015-09-30 | 郭作超 | Forming method of far-infrared glass globe lens blank |
| CN104849796A (en) * | 2015-03-19 | 2015-08-19 | 华南理工大学 | Micro-lens array light guide plate with adaptive spacing |
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Non-Patent Citations (1)
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