CN114714610B - Method and device for continuously producing microprism reflective film in vacuum mode - Google Patents
Method and device for continuously producing microprism reflective film in vacuum mode Download PDFInfo
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- CN114714610B CN114714610B CN202210237359.5A CN202210237359A CN114714610B CN 114714610 B CN114714610 B CN 114714610B CN 202210237359 A CN202210237359 A CN 202210237359A CN 114714610 B CN114714610 B CN 114714610B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 90
- 238000003825 pressing Methods 0.000 claims abstract description 84
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 84
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 84
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 238000007731 hot pressing Methods 0.000 claims abstract description 28
- 238000001816 cooling Methods 0.000 claims description 52
- 239000000110 cooling liquid Substances 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010924 continuous production Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 description 4
- 229920002799 BoPET Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
-
- 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
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
-
- 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
- B29L2007/008—Wide strips, e.g. films, webs
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- 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
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0083—Reflectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
Abstract
A method and a device for continuously producing a microprism reflecting film in vacuum. A method for continuously producing a microprism reflecting film in vacuum comprises the following steps: and (5) performing reflective film edge pressing in the vacuum chamber. The utility model provides a device of vacuum type continuous production microprism reflective membrane, includes frame, vacuum chamber, pressure arris mechanism, presses the arris mechanism to locate in the vacuum chamber, presses arris mechanism to include feed roll, receipts material roller, mould area, heating roller, tensioning roller, first compression roller, second compression roller. The microprism reflecting film is produced in a vacuum chamber environment, no air exists between the thermoplastic film and the mold belt, the thermoplastic film can be tightly attached to the mold belt when being hot pressed, so that the shape of microprism stripes on the thermoplastic film is matched with the shape of the stripes on the mold belt, the edges and corners of the microprism stripes can be smaller, higher and more accurate, and the reflecting effect is good when the microprism reflecting film is used. The whole hot pressing process can be continuously carried out, and the production efficiency is high.
Description
Technical Field
The invention relates to the field of microprism films, in particular to a method and a device for continuously producing a microprism reflective film in vacuum.
Background
The surface of the microprism reflecting film or the microprism reflecting sheet is provided with microprism stripes, reflected light after being irradiated is refracted and converged by the microprisms to form bright light, and the bright light has obvious marks after being irradiated by light in the night environment. The existing method for producing the microprism reflecting film or reflecting sheet is to heat the base material, press the base material with a plate-shaped mould with microprism stripes on the surface or press the base material on the plate-shaped mould for shaping, cool the base material after shaping, and form the microprism stripes on the surface. The method has low production efficiency, and the shape of the produced microprism stripes can not be matched with the shape of the stripes on the mold due to the influence of heat shrinkage and clearance air, so that the angle of obvious edges is larger, the stripe height is lower, and the luminous effect is poor.
Disclosure of Invention
The invention aims to overcome the defects and provide a method and a device for continuously producing the microprism reflective film in vacuum with high production efficiency and good reflective effect.
In order to achieve the above object, the technical solution of the present invention is: a method for continuously producing a microprism reflecting film in vacuum comprises the following steps:
performing reflective film edge pressing in a vacuum chamber; the reflective film edge pressing method comprises the following steps: conveying a die belt, carrying out primary hot pressing, carrying out secondary hot pressing and cooling a thermoplastic film;
the die belt is conveyed, the annular band-shaped die belt is wound on the heating roller and the tensioning roller, the heating roller and the tensioning roller rotate to drive the die belt to circularly run, the die belt runs to the heating roller to heat, and the die belt leaves the heating roller to cool;
primary hot pressing: pressing the thermoplastic film on a die belt wound on a heating roller by using a first pressing roller, wherein the minimum distance between the surface of the first pressing roller and the outer surface of the die belt is L1, and the thermoplastic film moves along with the die belt on the heating roller;
and (3) secondary hot pressing: pressing the thermoplastic film subjected to primary hot pressing on a die belt wound on a heating roller by using a second pressing roller, wherein the minimum distance between the surface of the second pressing roller and the outer surface of the die belt is L2, and L2 is smaller than L1;
and cooling the thermoplastic film, wherein the thermoplastic film subjected to secondary hot pressing is adhered to the die belt and leaves the heating roller along with running of the die belt for primary cooling, the thermoplastic film subjected to primary cooling and the die belt are separated for secondary cooling, and the thermoplastic film is subjected to secondary cooling to form the microprism reflecting film.
The vacuum chamber environment enables no air to exist between the thermoplastic film and the die belt, the thermoplastic film can be tightly attached to the die belt when being hot pressed, the shape of the microprism stripes on the thermoplastic film is matched with the shape of the stripes on the die belt, and the edges and corners of the microprism stripes can be smaller, higher and more accurate, so that the reflection effect is good when the vacuum chamber is used.
The die belt is in a ring shape and runs along with the circulation of the heating roller and the tensioning roller, so that the die belt is reheated at the position of the heating roller, is cooled after leaving the heating roller, and the temperature accumulation of the die belt cannot become too high. The thermoplastic film can be attached to the position with low temperature of the die belt and then is heated slowly along with the movement of the die belt on the heating roller, the thermoplastic film is heated by the first pressing roller and the second pressing roller for twice according to the heating degree, the thermoplastic film can uniformly flow into the strip gaps on the die belt during the hot pressing, the thermoplastic film can be cooled along with the departure of the die belt from the heating roller after the secondary hot pressing, and the thermoplastic film is separated from the die belt after being cooled to be fixed in shape. The whole hot pressing process can be continuously carried out, and the production efficiency is high. The thermoplastic film may be a PET film.
Preferably, the method further comprises a vacuumizing step, wherein a rib pressing mechanism for pressing the rib of the reflecting film is arranged at the front end of the first vertical plate, the rib pressing mechanism is covered by the vacuum cover in a transverse moving mode, the vacuum cover and the first vertical plate form a vacuum chamber, and the vacuum chamber is vacuumized through a vacuumizing device. The prismatic mechanism is covered by the transversely-moving vacuum cover to realize the vacuum chamber, so that personnel can conveniently load and unload materials, and the production efficiency is improved.
Preferably, the thermoplastic film is wound around a cooling roller for secondary cooling, the heating roller is arranged at the upper part of the vacuum chamber, the cooling roller is arranged at the lower part of the vacuum chamber, the cooling roller is cooled by cooling liquid fed into the cooling liquid by a cooling liquid device, the heating roller is heated by heating oil fed into the heating oil device, and the heating oil device adjusts the flow of the heating oil fed into the heating roller according to the temperature of the heating roller and the change of the temperature of the upper part of the vacuum chamber. The flow rate of heating oil in the heating roller is q1=q0- (t 1-t 0) p, Q0 is rated flow rate, t1 is the actual temperature of the heating roller, t0 is the rated temperature of the heating roller, p is the influencing factor of the temperature in the vacuum chamber on the hot press forming of the thermoplastic film, and the temperature of the vacuum chamber can be adjusted by testing when the heating roller works at the temperature t 0.
The device for continuously producing the microprism reflecting film in vacuum comprises a frame, a vacuum chamber and a rib pressing mechanism, wherein the rib pressing mechanism is arranged in the vacuum chamber and comprises a feeding roller, a receiving roller, a die belt, a heating roller, a tensioning roller, a first compression roller and a second compression roller;
the die belt is annular, the annular die belt is wound on the heating roller and the tensioning roller, and strip-shaped convex lines are arranged on the outer surface of the die belt; the heating roller and the tensioning roller are both rotatably arranged on the frame, and the heating roller can heat the die belt;
the first press roller and the second press roller are both rotatably arranged on the frame, and are both close to the heating roller and used for pressing the thermoplastic film on the die belt outside the heating roller;
the feeding roller is rotatably arranged on the frame and used for releasing the thermoplastic film;
the material receiving roller is rotatably arranged on the frame and is used for rolling the thermoplastic film.
Preferably, the edge pressing mechanism further comprises a cooling roller rotatably arranged on the frame, and the cooling roller is used for cooling the thermoplastic film. The cooling roller can rapidly cool the thermoplastic film after hot-press forming, so that microprism stripes on the thermoplastic film are fixed, and the material receiving roller is convenient to wind.
Preferably, the feeding roller and the receiving roller comprise a first rotating shaft and a first gear arranged at the end part of the first rotating shaft; the frame comprises a first vertical plate, a second vertical plate and two sets of shaft seat assemblies, and the first vertical plate and the second vertical plate are oppositely arranged; each set of shaft seat assembly comprises two quick-assembly shaft seats which are respectively arranged on opposite surfaces of the first vertical plate and the second vertical plate; the two fast-assembling shaft seats of each set of shaft seat assembly comprise shaft seats, and at least one fast-assembling shaft seat also comprises a second gear; the second gear is rotatably arranged on the shaft seat, an inclined sliding groove with one high end and one low end is arranged on the side face of the shaft seat, an opening is arranged on the upper portion of one high end of the sliding groove, an arc-shaped rotating shaft groove is arranged on one low end of the sliding groove, the end portion of the first rotating shaft can enter the sliding groove from the opening, and the first gear is meshed with the second gear when the end portion of the first rotating shaft moves into the rotating shaft groove. The feeding roller and the receiving roller can be easily taken out or put in from the opening of the chute, the material changing is fast, and the production efficiency is high.
Preferably, the fast-assembling axle bed still includes the locking bolt, and the axle bed is equipped with the bearing groove in the outside in pivot groove, and the locking bolt sets up on the axle bed, and the locking bolt can stretch into the bearing groove when rotatory locking bolt, and the both ends of first pivot all are equipped with the bearing, and when the tip of first pivot was put into the pivot groove, the bearing was located the bearing inslot. The locking bolt is used for locking the bearing in the bearing groove.
Preferably, the vacuum chamber is communicated with the vacuum chamber, and the vacuum chamber is pumped by the vacuum device; the vacuum chamber comprises a vacuum cover, the frame comprises a first vertical plate, a connecting rod, a second vertical plate and a base, the first vertical plate is arranged on the base, the connecting rod is suspended and arranged at the front end of the first vertical plate, the second vertical plate is arranged at the front end of the connecting rod, the edge pressing mechanism is arranged between the first vertical plate and the second vertical plate, the base is provided with a track on the front side of the first vertical plate, the vacuum cover can be arranged on the track in a back-and-forth moving mode, and the vacuum cover can move to the front end of the first vertical plate, and the vacuum chamber is formed by the vacuum cover and the first vertical plate. The vacuum chamber is realized through the first riser of sideslip cover to the vacuum cover, and the sideslip of vacuum cover is faster than the speed of hoist and mount, and efficiency is higher.
Preferably, the frame comprises a first vertical plate, a second vertical plate and three groups of adjusting devices, each group of adjusting devices comprises two adjusting mechanisms respectively arranged on the first vertical plate and the second vertical plate, each adjusting mechanism comprises a telescopic cylinder, a slide way and a slide seat, and the slide seat is movably arranged on the slide way; one end of the telescopic cylinder is connected with the sliding seat and used for driving the sliding seat to move; the two ends of the tensioning roller, the first compression roller and the second compression roller are respectively and rotatably connected with the sliding seats of the two adjusting mechanisms of the group of adjusting devices. The adjusting mechanism is used for adjusting the positions of the tensioning roller, the first pressing roller and the second pressing roller.
By adopting the technical scheme, the invention has the beneficial effects that: the microprism reflecting film is produced in a vacuum chamber environment, no air exists between the thermoplastic film and the mold belt, the thermoplastic film can be tightly attached to the mold belt when being hot pressed, so that the shape of microprism stripes on the thermoplastic film is matched with the shape of the stripes on the mold belt, the edges and corners of the microprism stripes can be smaller, higher and more accurate, and the reflecting effect is good when the microprism reflecting film is used. The whole hot pressing process can be continuously carried out, and the production efficiency is high.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of the rib pressing mechanism of the present invention;
FIG. 3 is a schematic view of the structure of the inside of the rib pressing mechanism of the present invention;
FIG. 4 is a schematic view of the structure of a thermoplastic film as it is produced in the rib pressing mechanism;
FIG. 5 is a schematic view of the structure of the feeding or receiving roller of the present invention on an axle seat assembly;
fig. 6 is a schematic structural diagram of a quick-assembly axle seat according to the present invention.
The main reference numerals illustrate:
a frame 1; a first riser 11; a second riser 12; a connecting rod 13; a track 14; an adjusting mechanism 15; a slideway 151; a slider 152; a telescopic cylinder 153; a quick-fit shaft seat 16; an axle seat 161; a chute 1611; a rotation shaft groove 1612; an opening 1613; a bearing groove 1614; a second gear 162; a lock bolt 163; a rib pressing mechanism 2; a heating roller 21; a tension roller 22; a die belt 23; a first press roller 24; a second press roller 25; a feed roller 26; a cooling roller 27; a take-up roll 28; a vacuum cover 3; a thermoplastic film 4; a first gear 51; a first shaft 52.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
Example 1:
as shown in figures 1-6, the device for continuously producing the microprism reflective film in vacuum comprises a frame 1, a vacuum chamber, a rib pressing mechanism 2 and a vacuumizing device. The vacuumizing device is communicated with the vacuum chamber and is used for vacuumizing the vacuum chamber. The vacuum chamber includes vacuum hood 3, frame 1 includes first riser 11, connecting rod 13, second riser 12 and base, first riser 11 sets up on the base, the front end of first riser 11 is located in the overhanging of connecting rod 13, the front end of connecting rod 13 is located to second riser 12, pressure arris mechanism 2 locates between first riser 11 and the second riser 12, the base is equipped with track 14 at the front side of first riser, vacuum hood 3 can reciprocate to set up on track 14, vacuum hood 3 can move to the front end of first riser 11, vacuum hood 3 and first riser 11 constitute the vacuum chamber. The outer wall of the vacuum cover 3 is provided with a transparent window for observing the inside. The edge pressing mechanism 2 is arranged in the vacuum chamber.
As shown in fig. 2 to 4, the edge pressing mechanism 2 includes a heating roller 21, a tension roller 22, a die belt 23, a first pressing roller 24, a second pressing roller 25, a feeding roller 26, a cooling roller 27, and a take-up roller 28.
The die belt 23 is annular, the annular die belt 23 is wound on the heating roller 21 and the tensioning roller 22, and the heating roller 21 and the tensioning roller 22 rotate to drive the die belt 23 to run circularly. The outer surface of the die belt 23 is provided with strip-shaped convex lines; the heating roller 21 and the tensioning roller 22 are rotatably arranged on the frame 1, and the heating roller 21 can heat the die belt 23. The tension roller 22 is provided below the heating roller 21.
The first pressing roller 24 and the second pressing roller 25 are rotatably arranged on the frame 1, and the first pressing roller 24 and the second pressing roller 25 are close to the heating roller 21 and are used for pressing the thermoplastic film 4 on the die belt 23 outside the heating roller 21;
a feeding roller 26 is rotatably provided on the frame 1 for releasing the thermoplastic film 4; the take-up roller 28 is rotatably provided on the frame for taking up the thermoplastic film 4. A cooling roller 27 is rotatably provided on the frame 1, the cooling roller 27 being for cooling the thermoplastic film 4. The thermoplastic film is a PET film. The feed roll 26 and the take-up roll 28 are provided on the left and right sides of the die strip, respectively.
The vacuum cover is internally provided with a hot air device for generating hot air.
As shown in fig. 1 and 4, the method for continuously producing the microprism reflective film in vacuum type according to the present invention comprises the following steps:
vacuumizing, namely transversely moving the vacuum cover 3 to be close to the first vertical plate 11, blowing hot air into the vacuum cover by the hot air device in the process that the vacuum cover is close to the first vertical plate, covering the rib pressing mechanism by the vacuum cover after the vacuum cover is filled with the hot air, forming a vacuum chamber by the vacuum cover 3 and the first vertical plate, and vacuumizing the vacuum chamber by the vacuumizing device.
Performing reflective film edge pressing in a vacuum chamber; the reflective film edge pressing method comprises the following steps: conveying the die belt, carrying out primary hot pressing, carrying out secondary hot pressing and cooling the thermoplastic film.
The mould belt is conveyed, the annular band-shaped mould belt 23 is wound on the heating roller 21 and the tensioning roller 22, the heating roller 21 and the tensioning roller 22 rotate to drive the mould belt 23 to circularly run, the mould belt 23 runs to the heating roller 21 to heat, and the mould belt 23 leaves the heating roller 21 to cool.
Primary hot pressing: the thermoplastic film 4 is drawn out from the feed roller 26 and moved to the die belt on the heat roller, the thermoplastic film 4 is pressed against the die belt 23 wound around the heat roller 21 by the first pressing roller 24, the surface of the first pressing roller 24 is at a minimum distance L1 from the outer surface of the die belt, and the thermoplastic film 4 moves on the heat roller 21 with the die belt 23.
And (3) secondary hot pressing: the thermoplastic film 4 after the primary heat pressing is pressed on the die belt 23 wound around the heating roller 21 by the second pressing roller 25, and the minimum distance between the surface of the second pressing roller 25 and the outer surface of the die belt is L2, L2 being smaller than L1. The first press roller 24 and the second press roller 25 sequentially press the thermoplastic film 4 to the die belt for shaping, and the heating roller is fed with heating oil by the heating oil device for heating; the heating roller 21 can continuously heat the thermoplastic film 4 during the primary heat pressing and the secondary heat pressing.
The thermoplastic film is cooled, the thermoplastic film 4 after the secondary hot pressing is adhered to the die belt 23 and leaves the heating roller 21 along with the running of the die belt 23 for primary cooling, the thermoplastic film 4 after the primary cooling is separated from the die belt 23 for secondary cooling, the thermoplastic film 4 is wound on the cooling roller 27 for secondary cooling, and the thermoplastic film 4 forms a microprism reflecting film after the secondary cooling. The heating roller is arranged at the upper part of the vacuum chamber, the cooling roller is arranged at the lower part of the vacuum chamber, and the cooling roller is fed with cooling liquid by the cooling liquid device for cooling.
And after the thermoplastic film is cooled, rolling the microprism reflecting film by a material collecting roller. After the whole roll of thermoplastic film is subjected to edge pressing, the vacuum cover is removed, and the thermoplastic film can be taken down from the edge pressing mechanism.
Example 2
As shown in figures 1-6, the device for continuously producing the microprism reflective film in vacuum comprises a frame 1, a vacuum chamber, a rib pressing mechanism 2 and a vacuumizing device. The vacuumizing device is communicated with the vacuum chamber and is used for vacuumizing the vacuum chamber. The vacuum chamber includes vacuum hood 3, frame 1 includes first riser 11, connecting rod 13, second riser 12 and base, first riser 11 sets up on the base, the front end of first riser 11 is located in the overhanging of connecting rod 13, the front end of connecting rod 13 is located to second riser 12, pressure arris mechanism 2 locates between first riser 11 and the second riser 12, the base is equipped with track 14 at the front side of first riser, vacuum hood 3 can reciprocate to set up on track 14, vacuum hood 3 can move to the front end of first riser 11, vacuum hood 3 and first riser 11 constitute the vacuum chamber. The outer wall of the vacuum cover 3 is provided with a transparent window for observing the inside. The edge pressing mechanism 2 is arranged in the vacuum chamber.
As shown in fig. 2 to 4, the edge pressing mechanism 2 includes a heating roller 21, a tension roller 22, a die belt 23, a first pressing roller 24, a second pressing roller 25, a feeding roller 26, a cooling roller 27, and a take-up roller 28.
The die belt 23 is annular, the annular die belt 23 is wound on the heating roller 21 and the tensioning roller 22, and the heating roller 21 and the tensioning roller 22 rotate to drive the die belt 23 to run circularly. The outer surface of the die belt 23 is provided with strip-shaped convex lines; the heating roller 21 and the tensioning roller 22 are rotatably arranged on the frame 1, and the heating roller 21 can heat the die belt 23. The tension roller 22 is provided below the heating roller 21.
The first pressing roller 24 and the second pressing roller 25 are rotatably arranged on the frame 1, and the first pressing roller 24 and the second pressing roller 25 are close to the heating roller 21 and are used for pressing the thermoplastic film 4 on the die belt 23 outside the heating roller 21;
a feeding roller 26 is rotatably provided on the frame 1 for releasing the thermoplastic film 4; the take-up roller 28 is rotatably provided on the frame for taking up the thermoplastic film 4. A cooling roller 27 is rotatably provided on the frame 1, the cooling roller 27 being for cooling the thermoplastic film 4. The thermoplastic film is a PET film. The feed roll 26 and the take-up roll 28 are provided on the left and right sides of the die strip, respectively.
As shown in fig. 3, 5 and 6, the frame 1 further includes two sets of axle seat assemblies. The feeding roller 26 and the receiving roller 27 comprise a first rotating shaft 52 and a first gear 51 arranged at the end part of the first rotating shaft 51, and bearings are arranged at two ends of the first rotating shaft 52. The first vertical plate 11 and the second vertical plate 12 are arranged oppositely; each set of shaft seat assembly comprises two quick-assembly shaft seats 16, and the two quick-assembly shaft seats 16 are respectively arranged on opposite surfaces of the first vertical plate 11 and the second vertical plate 12. Each set of shaft seat assembly comprises two fast-assembling shaft seats 16, wherein one fast-assembling shaft seat 16 further comprises a second gear 162, the second gear 162 is rotatably arranged on the shaft seat 161, and a motor for driving the second gear to rotate is arranged on the frame. The side of the shaft seat 161 is provided with an inclined slide groove 1611 with one high end and the other low end, the upper part of the high end of the slide groove 1611 is provided with an opening 1613, the slide groove 1611 is provided with a circular arc-shaped rotating shaft groove 1612 at the low end, the end part of the first rotating shaft 52 can enter the slide groove 1611 from the opening 1613, and the first gear 51 and the second gear 162 are meshed when the end part of the first rotating shaft 52 moves into the rotating shaft groove 1612. The end of the feeding roller or the receiving roller is put into the sliding groove 1611 and then can slide into the rotating shaft groove 1612 for quick assembly. The fast-assembling axle bed 16 still includes locking bolt 163, and axle bed 161 is equipped with bearing groove 1614 in the outside in pivot groove, and locking bolt 163 sets up on the axle bed, and locking bolt can stretch into bearing groove when rotatory locking bolt, and the both ends of first pivot all are equipped with the bearing, and when the tip of first pivot was put into the pivot groove, the bearing was located bearing groove 1614.
As shown in fig. 2-4, the frame further includes three sets of adjusting devices, each set of adjusting devices includes two adjusting mechanisms 15 respectively disposed on the first vertical plate 11 and the second vertical plate 12, the adjusting mechanisms 15 include a telescopic cylinder 153, a slide way 151, and a slide seat 152, and the slide seat 152 is movably disposed on the slide way 151; one end of the telescopic cylinder 153 is connected with the sliding seat 152 and is used for driving the sliding seat 152 to move; the slide 151 and the telescopic cylinder 153 are both disposed at the front end of the first riser or the rear end of the second riser. The two ends of the tensioning roller 22, the first pressing roller 24 and the second pressing roller 25 are respectively rotatably connected with the sliding seat 152 of the two adjusting mechanisms of the group of adjusting devices. The adjustment mechanism 15 can maintain the die belt 23 in tension by adjusting the position of the tensioning roller 22. The adjusting mechanism 15 can adjust the distance between the first press roller and the second press roller and the heating roller by adjusting the positions of the first press roller and the second press roller.
As shown in fig. 1 and 4, the method for continuously producing the microprism reflective film in vacuum type according to the present invention comprises the following steps:
the vacuum pumping is carried out, the edge pressing mechanism for pressing the edge of the reflecting film is arranged at the front end of the first vertical plate, the edge pressing mechanism is covered by the vacuum cover 3 in a transverse moving mode, the vacuum cover 3 and the first vertical plate form a vacuum chamber, and the vacuum chamber is vacuumized through the vacuumizing device.
Performing reflective film edge pressing in a vacuum chamber; the reflective film edge pressing method comprises the following steps: conveying the die belt, carrying out primary hot pressing, carrying out secondary hot pressing and cooling the thermoplastic film.
The mould belt is conveyed, the annular band-shaped mould belt 23 is wound on the heating roller 21 and the tensioning roller 22, the heating roller 21 and the tensioning roller 22 rotate to drive the mould belt 23 to circularly run, the mould belt 23 runs to the heating roller 21 to heat, and the mould belt 23 leaves the heating roller 21 to cool.
Primary hot pressing: the thermoplastic film 4 is drawn out from the feed roller 26 and moved to the die belt on the heat roller, the thermoplastic film 4 is pressed against the die belt 23 wound around the heat roller 21 by the first pressing roller 24, the surface of the first pressing roller 24 is at a minimum distance L1 from the outer surface of the die belt, and the thermoplastic film 4 moves on the heat roller 21 with the die belt 23.
And (3) secondary hot pressing: the thermoplastic film 4 after the primary heat pressing is pressed on the die belt 23 wound around the heating roller 21 by the second pressing roller 25, and the minimum distance between the surface of the second pressing roller 25 and the outer surface of the die belt is L2, L2 being smaller than L1. The first press roller 24 and the second press roller 25 sequentially press the thermoplastic film 4 to the die belt for shaping, and the heating roller is fed with heating oil by the heating oil device for heating; the heating roller 21 can continuously heat the thermoplastic film 4 during the primary heat pressing and the secondary heat pressing.
The thermoplastic film is cooled, the thermoplastic film 4 after the secondary hot pressing is adhered to the die belt 23 and leaves the heating roller 21 along with the running of the die belt 23 for primary cooling, the thermoplastic film 4 after the primary cooling is separated from the die belt 23 for secondary cooling, the thermoplastic film 4 is wound on the cooling roller 27 for secondary cooling, and the thermoplastic film 4 forms a microprism reflecting film after the secondary cooling. The heating roller is arranged at the upper part of the vacuum chamber, the cooling roller is arranged at the lower part of the vacuum chamber, and the cooling roller is fed with cooling liquid by the cooling liquid device for cooling.
And after the thermoplastic film is cooled, rolling the microprism reflecting film by a material collecting roller. After the whole roll of thermoplastic film is subjected to edge pressing, the vacuum cover is removed, and the thermoplastic film can be taken down from the edge pressing mechanism.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.
Claims (2)
1. The method for continuously producing the microprism reflecting film in vacuum is characterized by comprising the following steps of:
the vacuum pumping is carried out, the edge pressing mechanism for pressing the edges of the reflective film is arranged at the front end of the first vertical plate, the first vertical plate is arranged on the base, the connecting rod is arranged at the front end of the first vertical plate in a overhanging manner, the second vertical plate is arranged at the front end of the connecting rod, the edge pressing mechanism is arranged between the first vertical plate and the second vertical plate, the base is provided with a track at the front side of the first vertical plate, the vacuum cover can be arranged on the track in a back-and-forth moving manner, the vacuum cover is transversely moved to be close to the first vertical plate, in the process that the vacuum cover is close to the first vertical plate, hot air is blown into the vacuum cover by the hot air device, after the vacuum cover is filled with hot air, the vacuum cover covers the edge pressing mechanism, and the vacuum cover and the first vertical plate form a vacuum chamber, and the vacuum pumping device is used for vacuumizing the vacuum chamber;
performing reflective film edge pressing in a vacuum chamber; the reflective film edge pressing method comprises the following steps: conveying a die belt, carrying out primary hot pressing, carrying out secondary hot pressing and cooling a thermoplastic film;
the die belt is conveyed, the annular band-shaped die belt is wound on the heating roller and the tensioning roller, the heating roller and the tensioning roller rotate to drive the die belt to circularly run, the die belt runs to the heating roller to heat, and the die belt leaves the heating roller to cool; primary hot pressing: the thermoplastic film is led out from the feeding roller and moves to a die belt on the heating roller, the thermoplastic film is pressed on the die belt wound on the heating roller by a first pressing roller, the minimum distance between the surface of the first pressing roller and the outer surface of the die belt is L1, and the thermoplastic film moves along with the die belt on the heating roller;
pressing the thermoplastic film after primary hot pressing on a die belt wound on a heating roller by a second pressing roller, wherein the minimum distance between the surface of the second pressing roller and the outer surface of the die belt is L2, and L2 is smaller than L1; the heating roller continuously heats the thermoplastic film in the processes of primary hot pressing and secondary hot pressing;
and cooling the thermoplastic film, wherein the thermoplastic film subjected to secondary hot pressing is adhered to the die belt and leaves the heating roller along with running of the die belt for primary cooling, the thermoplastic film subjected to primary cooling and the die belt are separated for secondary cooling, and the thermoplastic film is subjected to secondary cooling to form the microprism reflecting film.
2. The method for continuously producing a reflecting film for microprisms according to claim 1, wherein the thermoplastic film is secondarily cooled by winding it around a cooling roller, a heating roller is provided at an upper portion of the vacuum chamber, the cooling roller is provided at a lower portion of the vacuum chamber, the cooling roller is cooled by feeding a cooling liquid into the cooling liquid device, and the heating roller is heated by feeding a heating oil into the heating oil device.
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