CN114714610A - Method and device for vacuum continuous production of microprism reflective film - Google Patents
Method and device for vacuum continuous production of microprism reflective film Download PDFInfo
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- CN114714610A CN114714610A CN202210237359.5A CN202210237359A CN114714610A CN 114714610 A CN114714610 A CN 114714610A CN 202210237359 A CN202210237359 A CN 202210237359A CN 114714610 A CN114714610 A CN 114714610A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000010924 continuous production Methods 0.000 title claims abstract description 12
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 85
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 85
- 238000003825 pressing Methods 0.000 claims abstract description 67
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000007731 hot pressing Methods 0.000 claims abstract description 33
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000010792 warming Methods 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 93
- 238000001816 cooling Methods 0.000 claims description 57
- 238000005086 pumping Methods 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 239000012809 cooling fluid Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000110 cooling liquid Substances 0.000 description 6
- 229920002799 BoPET Polymers 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 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
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
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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
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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
- 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 vacuum continuous production of a microprism reflective film. A method for vacuum type continuous production of microprism reflective films comprises the following steps: and (5) pressing edges of the reflecting film in a vacuum chamber. The utility model provides a device of little prism reflective membrane of vacuum type continuous production, includes frame, real empty room, presses arris mechanism to locate in the real empty room, presses arris mechanism to include the feed roll, receive material roller, mould area, warming mill, tensioning roller, first compression roller, second compression roller. The microprism reflective film is produced in a vacuum chamber environment, air does not exist between the thermoplastic film and the die belt, the thermoplastic film can be tightly attached to the die belt when being hot-pressed, so that the shape of the microprism stripes on the thermoplastic film is matched with the shape of the stripes on the die belt, the edge angle of the microprism stripes can be smaller, higher and more accurate, and the reflective effect is good when the microprism reflective 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 a vacuum manner.
Background
The surface of the microprism reflective film or the microprism reflective sheet is provided with microprism stripes, reflected light is refracted and converged by the microprism to form bright light after being illuminated, and the microprism reflective film or the microprism reflective sheet is provided with a visible mark after being illuminated in a night environment. The existing production method of the microprism reflective film or reflective sheet comprises the steps of heating a base material, pressing the base material by a plate-shaped mold with microprism stripes on the surface or pressing the base material on the plate-shaped mold for shaping, and cooling the shaped base material to form the microprism stripes on the surface. The method has low production efficiency, and the produced microprism stripes cannot be matched with the stripes on the die due to the influence of thermal shrinkage and gap air, so that the angle of the obvious edge angle is large, the height of the stripes is low, 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 a microprism reflective film in a vacuum manner, which have high production efficiency and good reflective effect.
In order to achieve the purpose, the technical solution of the invention is as follows: a method for vacuum type continuous production of microprism reflective films comprises the following steps:
pressing edges of the reflecting film in a vacuum chamber; the method for pressing the edge of the light reflecting film comprises the following steps: conveying the die by a belt, carrying out primary hot pressing, carrying out secondary hot pressing and cooling the thermoplastic film;
conveying the mold belt, winding the annular belt-shaped mold belt on a heating roller and a tension roller, rotating the heating roller and the tension roller to drive the mold belt to circularly run, running the mold belt to the heating roller for heating, and leaving the mold belt from the heating roller for cooling;
primary hot pressing: pressing the thermoplastic film against the mold tape wound around the heated roller with a first pressing roller having a surface at a minimum distance L1 from an outer surface of the mold tape, the thermoplastic film moving with the mold tape on the heated roller;
secondary hot pressing: pressing the thermoplastic film subjected to the primary hot pressing on a mold 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 mold belt is L2, and L2 is smaller than L1;
thermoplastic film cooling, thermoplastic film after the secondary hot pressing pastes the mould area and leaves the warming mill roller along with the mould area is run and is carried out the primary cooling, thermoplastic film after the primary cooling separately carries out the secondary cooling with the mould area, forms the microprism reflective membrane after thermoplastic film secondary cooling.
The vacuum chamber environment makes no air between thermoplastic film and the mould area, and the mould area can be hugged closely when thermoplastic film is hot-pressed for the strip shape on the microprism stripe shape on the thermoplastic film and the mould area coincide, and the edges and corners of microprism stripe can be done littly, higher, more accurate, and the reflection is effectual during the use.
The mold belt is in an annular belt shape and circularly runs along with the heating roller and the tension roller, so that the mold belt can be reheated at the position of the heating roller and cooled after leaving the heating roller, and the temperature accumulation of the mold belt cannot become too high. The thermoplastic film can be laminated with the position that the mould area temperature is not high earlier and then is heated slowly when moving on the warming mill along with the mould area, and divide twice through first compression roller and second compression roller according to the heating degree and carry out the hot pressing to thermoplastic film, material can evenly flow to the stripe clearance on the mould area when the thermoplastic film is hot-pressed, and thermoplastic film can leave the warming mill along with the mould area after the secondary hot pressing and cool off, cool off and separate with the mould area after the shape is fixed again, the microprism stripe form that this method formed is plump, the size is accurate. 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 prism pressing mechanism for pressing the prism of the reflective film is arranged at the front end of the first vertical plate, the prism pressing mechanism is transversely covered by a vacuum cover, the vacuum cover and the first vertical plate form a vacuum chamber, and the vacuum chamber is vacuumized through a vacuumizing device. The vacuum chamber is realized by covering the edge pressing mechanism through the transversely moving vacuum cover, so that the loading and unloading of personnel are facilitated, and the production efficiency is improved.
Preferably, the thermoplastic film is secondarily cooled by being wound around a cooling roller, the 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 being supplied with a cooling liquid by a cooling liquid device, the heating roller is heated by being supplied with a heating oil by a heating oil device, and the heating oil device adjusts a flow rate of the heating oil supplied into the heating roller in accordance with changes in the temperature of the heating roller and the temperature of the upper portion of the vacuum chamber. The heating oil flow rate in the heating roller is Q1-Q0- (t1-t0) × p, Q0 is a rated flow rate, t1 is the actual temperature of the heating roller, t0 is the rated temperature of the heating roller, and p is an influence factor of the temperature in the vacuum chamber on the hot-press forming of the thermoplastic film, and the heating oil can be obtained by adjusting the temperature in the vacuum chamber when the heating roller works at the temperature of t0 through tests.
A device for vacuum continuous production of a microprism reflective film comprises a frame, a vacuum chamber and a prism pressing mechanism, wherein the prism pressing mechanism is arranged in the vacuum chamber and comprises a feeding roller, a receiving roller, a mold 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 the outer surface of the die belt is provided with strip-shaped convex lines; the heating roller and the tensioning roller can be rotatably arranged on the frame, and the heating roller can heat the die belt;
the first pressing roller and the second pressing roller can be rotatably arranged on the rack, and both the first pressing roller and the second pressing roller are close to the heating roller and are used for pressing the thermoplastic film on the die belt on the outer side of 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 used for rolling the thermoplastic film.
Preferably, the edge pressing mechanism further comprises a cooling roller, the cooling roller is rotatably arranged on the rack, and the cooling roller is used for cooling the thermoplastic film. The chill roll can be with the quick cooling of the thermoplastic film after thermoforming for the microprism stripe on the thermoplastic film is fixed, makes things convenient for the receipts material roller rolling.
Preferably, the feeding roller and the receiving roller respectively comprise a first rotating shaft and a first gear arranged at the end part of the first rotating shaft; the stand comprises a first vertical plate, a second vertical plate and two sets of shaft seat assemblies, wherein the first vertical plate and the second vertical plate are arranged oppositely; each set of shaft seat assembly comprises two fast-assembling shaft seats which are respectively arranged on the opposite surfaces of the first vertical plate and the second vertical plate; two fast-assembly shaft seats of each set of shaft seat assembly comprise shaft seats, and at least one fast-assembly shaft seat also comprises a second gear; the second gear is rotatably arranged on the shaft seat, the side face of the shaft seat is provided with a chute with one high end and the other low end, the upper part of the high end of the chute is provided with an opening, the low end of the chute is provided with a circular arc-shaped rotating shaft groove, the end part of the first rotating shaft can enter the chute from the opening, and the first gear is meshed with the second gear when the end part 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 setting is on the axle bed, and the locking bolt can stretch into the bearing groove during rotatory locking bolt, and the both ends of first pivot all are equipped with the bearing, and when the pivot groove was put into to the tip of first pivot, the bearing was located the bearing inslot. The locking bolt is used for locking the bearing positioned in the bearing groove.
Preferably, the vacuum-pumping device is communicated with the vacuum chamber and used for pumping air into the vacuum chamber; real empty room includes the vacuum cover, the frame includes first riser, the connecting rod, second riser and base, first riser sets up on the base, the connecting rod hangs and stretches the front end of locating first riser, the front end of connecting rod is located to the second riser, press arris mechanism to locate between first riser and the second riser, the base is equipped with the track in the front side of first riser, but the vacuum cover back-and-forth movement sets up on the track, the vacuum cover can be portable to the front end of first riser, vacuum cover and first riser constitution real empty room. The vacuum cover covers the first vertical plate through transverse movement to realize a vacuum chamber, and the transverse movement of the vacuum cover is faster than the hoisting speed and higher in efficiency.
Preferably, the rack 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 seats are movably arranged on the slide ways; one end of the telescopic cylinder is connected with the sliding seat and is 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 reflective film is produced in a vacuum chamber environment, air does not exist between the thermoplastic film and the die belt, the thermoplastic film can be tightly attached to the die belt when being hot-pressed, so that the shape of the microprism stripes on the thermoplastic film is matched with the shape of the stripes on the die belt, the edge angle of the microprism stripes can be smaller, higher and more accurate, and the reflective effect is good when the microprism reflective 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 structural view of the present invention;
FIG. 2 is a schematic structural diagram of a prism pressing mechanism according to the present invention;
FIG. 3 is a schematic view of the internal structure of the prism mechanism of the present invention;
FIG. 4 is a schematic view of a thermoplastic film as it is produced in a rib press;
FIG. 5 is a schematic view of the feed roll or take-up roll of the present invention in a configuration on a shaft mount assembly;
FIG. 6 is a schematic structural view of the quick-assembly shaft seat of the present invention.
Description of the main reference numerals:
a frame 1; a first vertical plate 11; a second upright plate 12; a connecting rod 13; a rail 14; an adjusting mechanism 15; a chute 151; a slide base 152; a telescoping cylinder 153; a fast-assembling shaft seat 16; a shaft 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 prism pressing mechanism 2; a heating roller 21; a tension roller 22; a mold belt 23; a first press roll 24; a second press roller 25; a feed roller 26; a cooling roll 27; a take-up roll 28; a vacuum housing 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 figures and the specific examples.
Example 1:
as shown in fig. 1-6, a device for vacuum continuous production of microprism reflective films comprises a frame 1, a vacuum chamber, a prism pressing mechanism 2 and a vacuum-pumping device. The vacuum pumping device is communicated with the vacuum chamber and used for pumping air to the vacuum chamber. Vacuum chamber includes vacuum cover 3, frame 1 includes first riser 11, connecting rod 13, second riser 12 and base, first riser 11 sets up on the base, connecting rod 13 overhangs the front end of locating first riser 11, the front end of connecting rod 13 is located to second riser 12, it locates between first riser 11 and the second riser 12 to press arris mechanism 2, the base is equipped with track 14 in the front side of first riser, but the setting of vacuum cover 3 back-and-forth movement is on track 14, vacuum cover 3 can move to the front end of first riser 11, vacuum chamber is constituteed with first riser 11 to vacuum cover 3. The outer wall of the vacuum cover 3 is provided with a transparent window which can be observed 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 mold belt 23, a first press roller 24, a second press roller 25, a feed roller 26, a cooling roller 27, and a take-up roller 28.
The mold belt 23 is annular, the annular mold belt 23 is wound on the heating roller 21 and the tension roller 22, and the heating roller 21 and the tension roller 22 rotate to drive the mold belt 23 to circularly run. The outer surface of the mould belt 23 is provided with a strip-shaped convex pattern; both the heating roller 21 and the tension roller 22 are rotatably provided 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.
Both the first press roller 24 and the second press roller 25 are rotatably provided on the frame 1, and both the first press roller 24 and the second press roller 25 are close to the heating roller 21 for pressing the thermoplastic film 4 on the mold belt 23 outside the heating roller 21;
the feed roller 26 is rotatably arranged on the frame 1 and is used for releasing the thermoplastic film 4; the receiving roller 28 is rotatably disposed on the frame for rolling the thermoplastic film 4. A cooling roller 27 is rotatably provided on the frame 1, and the cooling roller 27 is used for cooling the thermoplastic film 4. The thermoplastic film is a PET film. Feed rolls 26 and take-up rolls 28 are provided on the left and right sides of the die belt, respectively.
A hot air device for generating hot air is arranged in the vacuum cover.
As shown in fig. 1 and 4, the method for continuously producing a microprism reflective film in a vacuum 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 a hot air device in the process that the vacuum cover is close to the first vertical plate, filling the hot air into the vacuum cover, covering the edge pressing mechanism by the vacuum cover, forming a vacuum chamber by the vacuum cover 3 and the first vertical plate, and vacuumizing the vacuum chamber by a vacuumizing device.
Pressing edges of the reflecting film in a vacuum chamber; the method for pressing the edge of the reflecting film comprises the following steps: conveying the die by a belt, carrying out primary hot pressing, carrying out secondary hot pressing and cooling the thermoplastic film.
The mold belt is conveyed, the mold belt 23 in the shape of an endless belt is wound around the heating roller 21 and the tension roller 22, the heating roller 21 and the tension roller 22 rotate to drive the mold belt 23 to circularly run, the mold belt 23 runs to the heating roller 21 to be heated, and the mold belt 23 is separated from the heating roller 21 to be cooled.
Primary hot pressing: the thermoplastic film 4 is drawn from the feed roller 26 and moved to the die belt on the heating roller, and the thermoplastic film 4 is pressed against the die belt 23 wound on the heating roller 21 by the first press roller 24, the surface of the first press roller 24 being at a minimum distance L1 from the outer surface of the die belt, the thermoplastic film 4 moving on the heating roller 21 with the die belt 23.
Secondary hot pressing: the thermoplastic film 4 subjected to the primary hot pressing is pressed against the mold tape 23 wound around the heating roller 21 by the second pressing roller 25, the surface of the second pressing roller 25 is at a minimum distance L2 from the outer surface of the mold tape, and L2 is smaller than L1. The first compression roller 24 and the second compression roller 25 sequentially press the thermoplastic film 4 onto the mold belt for shaping, and the heating roller is fed with heating oil by a heating oil device for heating; the heating roller 21 can continuously heat the thermoplastic films 4 in the process of the primary hot-pressing and the secondary hot-pressing.
Thermoplastic film cooling, thermoplastic film 4 after the secondary hot pressing is pasted the mould area 23 and is left the warming mill 21 along with the running of mould area 23 and carry out primary cooling, thermoplastic film 4 after primary cooling separately carries out secondary cooling with mould area 23, thermoplastic film 4 is around carrying out secondary cooling on chill roll 27, form the microprism reflective film after thermoplastic film 4 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 sent into cooling liquid by the cooling liquid device for cooling.
And after the thermoplastic film is cooled, the microprism reflective film is rolled up through a material collecting roller. After the edge pressing of the whole roll of thermoplastic film is finished, the vacuum cover is removed, and the thermoplastic film can be taken down from the edge pressing mechanism.
Example 2
As shown in fig. 1-6, a device for vacuum continuous production of microprism reflective films comprises a frame 1, a vacuum chamber, a prism pressing mechanism 2 and a vacuum-pumping device. The vacuum pumping device is communicated with the vacuum chamber and used for pumping air to the vacuum chamber. Vacuum chamber includes vacuum cover 3, frame 1 includes first riser 11, connecting rod 13, second riser 12 and base, first riser 11 sets up on the base, connecting rod 13 overhangs the front end of locating first riser 11, the front end of connecting rod 13 is located to second riser 12, it locates between first riser 11 and the second riser 12 to press arris mechanism 2, the base is equipped with track 14 in the front side of first riser, but the setting of vacuum cover 3 back-and-forth movement is on track 14, vacuum cover 3 can move to the front end of first riser 11, vacuum chamber is constituteed with first riser 11 to vacuum cover 3. 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 mold belt 23, a first press roller 24, a second press roller 25, a feed roller 26, a cooling roller 27, and a take-up roller 28.
The mold belt 23 is annular, the annular mold belt 23 is wound on the heating roller 21 and the tension roller 22, and the heating roller 21 and the tension roller 22 rotate to drive the mold belt 23 to circularly run. The outer surface of the mould belt 23 is provided with a strip-shaped convex pattern; both the heating roller 21 and the tension roller 22 are rotatably provided 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.
Both the first press roller 24 and the second press roller 25 are rotatably provided on the frame 1, and both the first press roller 24 and the second press roller 25 are close to the heating roller 21 for pressing the thermoplastic film 4 on the mold belt 23 outside the heating roller 21;
the feeding roller 26 is rotatably arranged on the frame 1 and is used for releasing the thermoplastic film 4; the receiving roller 28 is rotatably disposed on the frame for rolling the thermoplastic film 4. A cooling roller 27 is rotatably provided on the frame 1, and the cooling roller 27 is used for cooling the thermoplastic film 4. The thermoplastic film is a PET film. Feed rolls 26 and take-up rolls 28 are provided on the left and right sides of the die belt, respectively.
As shown in fig. 3, 5 and 6, the frame 1 further comprises two sets of axle seat assemblies. The feeding roller 26 and the receiving roller 27 both 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 both 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 fast-assembling shaft seats 16, and the two fast-assembling shaft seats 16 are respectively arranged on the opposite surfaces of the first vertical plate 11 and the second vertical plate 12. Two fast-assembling axle seats 16 of each set of axle seat assembly respectively comprise an axle seat 161, one fast-assembling axle seat 16 further comprises a second gear 162, the second gear 162 is rotatably arranged on the axle seat 161, and a motor for driving the second gear to rotate is arranged on the rack. The side of the shaft seat 161 is provided with an inclined sliding slot 1611 with a high end and a low end, the upper part of the high end of the sliding slot 1611 is provided with an opening 1613, the low end of the sliding slot 1611 is provided with a circular arc-shaped rotating shaft slot 1612, the end of the first rotating shaft 52 can enter the sliding slot 1611 from the opening 1613, and the first gear 51 is meshed with the second gear 162 when the end of the first rotating shaft 52 moves into the rotating shaft slot 1612. The end of the feed roll or the receiving roll can slide into the rotating shaft groove 1612 for fast assembly after being placed into the chute 1611. The fast-assembling axle bed 16 still includes locking bolt 163, and axle bed 161 is equipped with bearing groove 1614 in the outside of pivot groove, and locking bolt 163 sets up on the axle bed, and locking bolt protractile bearing groove during rotatory locking bolt, and the both ends of first pivot all are equipped with the bearing, and when the pivot groove was put into to the tip of first pivot, the bearing was located bearing groove 1614.
As shown in fig. 2 to 4, the rack further includes three sets of adjusting devices, each set of adjusting device includes two adjusting mechanisms 15 respectively disposed on the first vertical plate 11 and the second vertical plate 12, each adjusting mechanism 15 includes a telescopic cylinder 153, a slide 151, and a slide carriage 152, and the slide carriage 152 is movably disposed on the slide 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 slideway 151 and the telescopic cylinder 153 are both arranged at the front end of the first vertical plate or the rear end of the second vertical plate. The two ends of the tension roller 22, the first press roller 24 and the second press roller 25 are respectively rotatably connected with the sliding seats 152 of the two adjusting mechanisms of the set of adjusting device. The adjustment mechanism 15 may maintain the mold belt 23 in tension by adjusting the position of the tension roller 22. The adjusting mechanism 15 can adjust the distance between the first press roller and the heating roller by adjusting the position of the first press roller and the second press roller.
As shown in fig. 1 and 4, the method for continuously producing a microprism reflective film in a vacuum comprises the following steps:
vacuumizing, wherein a prism pressing mechanism for pressing the prism of the reflective film is arranged at the front end of the first vertical plate, the prism pressing mechanism is transversely covered by the vacuum cover 3, the vacuum chamber is formed by the vacuum cover 3 and the first vertical plate, and the vacuum chamber is vacuumized by a vacuumizing device.
Pressing edges of the reflecting film in a vacuum chamber; the method for pressing the edge of the light reflecting film comprises the following steps: conveying the die by a belt, carrying out primary hot pressing, carrying out secondary hot pressing and cooling the thermoplastic film.
The mold belt is conveyed, the mold belt 23 in the shape of an endless belt is wound around the heating roller 21 and the tension roller 22, the heating roller 21 and the tension roller 22 rotate to drive the mold belt 23 to circularly run, the mold belt 23 runs to the heating roller 21 to be heated, and the mold belt 23 is separated from the heating roller 21 to be cooled.
Primary hot pressing: the thermoplastic film 4 is drawn from the feed roller 26 and moved to the mold tape on the heating roller, and the thermoplastic film 4 is pressed against the mold tape 23 wound on the heating roller 21 by the first press roller 24, the surface of the first press roller 24 being at a minimum distance L1 from the outer surface of the mold tape, the thermoplastic film 4 being moved on the heating roller 21 with the mold tape 23.
And (3) secondary hot pressing: the thermoplastic film 4 after the primary hot pressing is pressed against the mold tape 23 wound around the heating roller 21 by the second pressing roller 25, the minimum distance between the surface of the second pressing roller 25 and the outer surface of the mold tape is L2, and L2 is smaller than L1. The first compression roller 24 and the second compression roller 25 sequentially press the thermoplastic film 4 to the die belt for shaping, and the heating roller is fed with heating oil by a heating oil device for heating; the heating roller 21 can continuously heat the thermoplastic film 4 in the process of the primary hot pressing and the secondary hot pressing.
Thermoplastic film cooling, thermoplastic film 4 after the secondary hot pressing pastes mould area 23 and leaves the warming mill 21 along with mould area 23 runs and carries out primary cooling, thermoplastic film 4 after primary cooling separately carries out secondary cooling with mould area 23, thermoplastic film 4 is around carrying out secondary cooling on chill roll 27, form the microprism reflective membrane after thermoplastic film 4 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 sent into cooling liquid by the cooling liquid device for cooling.
And after the thermoplastic film is cooled, the microprism reflective film is rolled up through a material collecting roller. After the edge pressing of the whole roll of thermoplastic film is finished, the vacuum cover is removed, and the thermoplastic film can be taken down from the edge pressing mechanism.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, and all equivalent variations and modifications made in the claims of the present invention should be included in the scope of the present invention.
Claims (9)
1. A method for vacuum type continuous production of microprism reflective films is characterized by comprising the following steps:
pressing edges of the reflecting film in a vacuum chamber; the method for pressing the edge of the light reflecting film comprises the following steps: conveying the die by a belt, carrying out primary hot pressing, carrying out secondary hot pressing and cooling the thermoplastic film;
conveying the mold belt, winding the annular belt-shaped mold belt on a heating roller and a tension roller, rotating the heating roller and the tension roller to drive the mold belt to circularly run, running the mold belt to the heating roller for heating, and leaving the mold belt from the heating roller for cooling;
primary hot pressing: pressing the thermoplastic film against the mold tape wound around the heated roller with a first pressing roller having a surface at a minimum distance L1 from an outer surface of the mold tape, the thermoplastic film moving with the mold tape on the heated roller;
secondary hot pressing: pressing the thermoplastic film subjected to the primary hot pressing on a mold 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 mold belt is L2, and L2 is smaller than L1;
thermoplastic film cooling, thermoplastic film after the secondary hot pressing is pasted the mould area and is gone away along with the mould area and leave the warming mill and carry out the primary cooling, and thermoplastic film after the primary cooling and mould area separately carry out the secondary cooling, form the microprism reflective membrane after thermoplastic film secondary cooling.
2. The method as claimed in claim 1, further comprising a step of evacuating, wherein a prism pressing mechanism for pressing the prism of the reflective film is disposed at the front end of the first vertical plate, a vacuum cover is transversely moved to cover the prism pressing mechanism, the vacuum cover and the first vertical plate form a vacuum chamber, and the vacuum chamber is evacuated by the evacuating device.
3. The method of claim 1, wherein the thermoplastic film is secondarily cooled by being wound around a cooling roller, the heating roller is disposed at an upper portion of the vacuum chamber, the cooling roller is disposed at a lower portion of the vacuum chamber, the cooling roller is cooled by being supplied with a cooling fluid from a cooling fluid device, and the heating roller is heated by being supplied with a heating oil from a heating oil device.
4. A device for vacuum continuous production of a microprism reflective film is characterized by comprising a frame, a vacuum chamber and a prism pressing mechanism, wherein the prism pressing mechanism is arranged in the vacuum chamber and comprises a feeding roller, a material receiving roller, a mold 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 the outer surface of the die belt is provided with strip-shaped convex lines; the heating roller and the tensioning roller can be rotatably arranged on the frame, and the heating roller can heat the die belt;
the first pressing roller and the second pressing roller can be rotatably arranged on the rack, and both the first pressing roller and the second pressing roller are close to the heating roller and are used for pressing the thermoplastic film on the die belt on the outer side of 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 used for rolling the thermoplastic film.
5. The apparatus of claim 4, wherein the prism press further comprises a cooling roller rotatably disposed on the frame, the cooling roller being used to cool the thermoplastic film.
6. The apparatus of claim 4, wherein the feeding roller and the receiving roller each comprise a first shaft and a first gear disposed at an end of the first shaft; the stand comprises a first vertical plate, a second vertical plate and two sets of shaft seat assemblies, wherein the first vertical plate and the second vertical plate are arranged oppositely; each set of shaft seat assembly comprises two fast-assembling shaft seats which are respectively arranged on the opposite surfaces of the first vertical plate and the second vertical plate; two fast-assembly shaft seats of each set of shaft seat assembly comprise shaft seats, and at least one fast-assembly shaft seat also comprises a second gear; the second gear is rotatably arranged on the shaft seat, the side face of the shaft seat is provided with a chute with one high end and the other low end, the upper part of the high end of the chute is provided with an opening, the low end of the chute is provided with a circular arc-shaped rotating shaft groove, the end part of the first rotating shaft can enter the chute from the opening, and the first gear is meshed with the second gear when the end part of the first rotating shaft moves into the rotating shaft groove.
7. The apparatus of claim 6, wherein the fast-assembling shaft holder further comprises a locking bolt, the shaft holder is provided with a bearing groove at an outer side of the rotation shaft groove, the locking bolt is disposed on the shaft holder, the locking bolt can extend into the bearing groove when the locking bolt is rotated, both ends of the first rotation shaft are provided with bearings, and the bearings are located in the bearing groove when the end of the first rotation shaft is placed into the rotation shaft groove.
8. The apparatus of claim 4, further comprising a vacuum pumping device connected to the vacuum chamber for pumping air into the vacuum chamber; real empty room includes the vacuum cover, the frame includes first riser, the connecting rod, second riser and base, first riser sets up on the base, the connecting rod hangs and stretches the front end of locating first riser, the front end of connecting rod is located to the second riser, press arris mechanism to locate between first riser and the second riser, the base is equipped with the track in the front side of first riser, but the vacuum cover back-and-forth movement sets up on the track, the vacuum cover can be portable to the front end of first riser, vacuum cover and first riser constitution real empty room.
9. The device for vacuum continuous production of a reflective film of a microprism according to claim 4, wherein the frame comprises a first vertical plate, a second vertical plate, and three sets of adjusting devices, each set of adjusting device comprises two adjusting mechanisms respectively disposed on the first vertical plate and the second vertical plate, the adjusting mechanisms comprise a telescopic cylinder, a slide way, and a slide seat, and the slide seat is movably disposed on the slide way; one end of the telescopic cylinder is connected with the sliding seat and is 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.
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| CN202210237359.5A CN114714610B (en) | 2022-03-11 | 2022-03-11 | Method and device for continuously producing microprism reflective film in vacuum mode |
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| CN202210237359.5A CN114714610B (en) | 2022-03-11 | 2022-03-11 | Method and device for continuously producing microprism reflective film in vacuum mode |
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