CN206242484U - A kind of preheating and cooling system for acrylic board bending - Google Patents
A kind of preheating and cooling system for acrylic board bending Download PDFInfo
- Publication number
- CN206242484U CN206242484U CN201621211313.2U CN201621211313U CN206242484U CN 206242484 U CN206242484 U CN 206242484U CN 201621211313 U CN201621211313 U CN 201621211313U CN 206242484 U CN206242484 U CN 206242484U
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Abstract
The utility model discloses a kind of preheating for acrylic board bending and cooling system, including cooling tower, pre- hot-die, the water-receiving tray outside of the cooling tower is provided with outlet pipe, and it is communicated to the inside of water-receiving tray, the outlet pipe connects supply-water pump by water pipe, supply-water pump connects the water inlet port of a bus-bar by water pipe, the water outlet port of one bus-bar connects the water inlet water fittings in the base plate die holder of pre- hot-die with the water hole loop end of setting in movable mold by flexible pipe, the water fittings set in the base plate die holder of pre- hot-die and in movable mold connects water inlet port by flexible pipe, bus-bar connects back water pump by water pipe, back water pump connects the supervisor outer end of water-locator by water pipe；The cooling speed of hot water is improved by cold tower, extends the service life of pre- hot-die, pre- hot-die can guarantee that acryl plates surface quality using Double-side Heating in addition, reduce the warpage of sub- gram plate, it is ensured that its plate face flatness, total physical efficiency energy saving, beneficial to environmental protection, production cost is reduced.
Description
Technical field
The utility model is related to acryl plates processing technique field, more particularly to a kind of for acrylic board bending
Preheating and cooling system.
Background technology
" acrylic " is a phonemic loans, and English is ACRYLIC.It is a kind of chemical material.Chemical name is called " PMMA "
Category polyacrylate, is commonly called as " by the lucite of specially treated ", the raw material of application industry acrylic it is general with
The forms such as grain, sheet material, tubing occur.Acrylic, also known as the lucite of specially treated, is lucite regeneration product, with sub- gram
Power make lamp box have good light transmission, pure color, rich color, it is attractive in appearance it is smooth, take into account two kinds of effects of night on daytime, make
With long lifespan, the features such as using is not influenceed, additionally, acryl plates and plastic-aluminum profile material, senior screen printing etc. can be tied with perfection
Close, meet the demand of businessman, acrylic plastic uptake is to improve business StoreFront class, the best outdoor advertising shape of unified corporate image
Formula.
Acrylic moulding plate：Molecular weight is high, with outstanding rigidity, intensity and excellent chemical resistance performance.Thus
Compare and be adapted to the large-sized mark board of processing, the relative time in softening process is slightly long.The characteristics of this sheet material is small lot
Processing, has incomparable flexibility in terms of colour system and surface texture effect, and product specification is complete, is practically applicable to various
Specific use.
At present, when acryl plates are processed for specific use, bending treatment need to be carried out to acrylic board, and it is now public
Be required for carrying out the pre-heat treatment before the acrylic bending known, and in the pre-heat treatment, known pre-heating device have single-side heating and
Two kinds of forms of Double-side Heating, and existing Double-side Heating technology is only heating, and the cooling treatment etc. after preheating, using
During cooling device, cooling effect is poor, also wastes substantial amounts of water.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of preheating for acrylic board bending
And cooling system.
The technical scheme that the utility model is used is：
A kind of preheating and cooling system for acrylic board bending, including cooling tower, pre- hot-die, pump, bus-bar, it is described
Cooling tower includes water-receiving tray, support, housing, lower flabellum, radiator, water dispersing disc, water-locator, upper flabellum, motor, the water receiving
Chassis inner side connecting bracket lower end, pedestal upper end connection housing lower margin, the middle part in housing sets radiator, radiator top
Housing in connection water dispersing disc, be also connected with water-locator in the housing, the supervisor of water-locator is through housing and positioned at water dispersing disc
Top, the housing upper port connects motor by upper frame, and the rotating shaft of motor connects main shaft upper end, main shaft lower end by shaft coupling
The liner of housing, the upper flabellum of main shaft top connection, its underpart connection lower flabellum, described water-receiving tray are connected by bearing
Outside is provided with outlet pipe, and is communicated to the inside of water-receiving tray；The outlet pipe connects supply-water pump by water pipe, and supply-water pump passes through
Water pipe connects total water inlet port of bus-bar, bus-bar separate water end (W.E.) mouthful connected in the base plate die holder of pre- hot-die by flexible pipe and
The water inlet water fittings at the water hole loop end set in movable mold, the water hole set in the base plate die holder of pre- hot-die and in movable mold
The water outlet water nozzle joint at loop end connects point water inlet port of bus-bar by flexible pipe, and total water outlet port of bus-bar passes through water pipe
Connection back water pump, back water pump connects the supervisor outer end of cooling tower upper water distributor by water pipe.
Further, described housing includes liner, gap, and the liner is connected to the lower end inside of housing, described
Gap is symmetrically arranged at the top of housing, and through housing, described gap overlaps with the side opening on described water dispersing disc.
Further, described radiator is made up of beam barrel and blade, radial symmetric connection on the outer round surface of the beam barrel
Some blades, the blade undulate, the length of the length less than beam barrel of the blade, the two-port of the beam barrel passes through axle
Hold connection main shaft.
Further, described water dispersing disc includes bottom outlet, sleeve, side opening, and the bottom of the water dispersing disc is provided with some bottom outlets, institute
State bottom centre's branch sleeve of water dispersing disc and through the bottom of water dispersing disc, side opening be arranged with the side wall of the water dispersing disc,
The water dispersing disc is fixed on the inwall of housing, and the side opening of water dispersing disc overlaps with the gap on housing, and the sleeve passes through
Bearing connects main shaft.
Further, described motor also includes upper frame and main shaft, and the motor is arranged on upper frame, and upper frame is fixed in housing
Upper port, the main shaft upper end by shaft coupling connect machine shaft, its lower end connects liner by bearing.
Further, described pre- hot-die includes base plate die holder, heating tube, water fittings, edge strip, guide pillar, movable mold, activity
Template, sliding seat, upper die plate, cylinder, one end level of the base plate die holder are provided inwardly with some bottoming holes, its other end level
If being provided inwardly with arterial highway water hole, heating tube is installed in the bottoming hole, the import and export in any road water hole is all connected with water nozzle and connects
Head, the upper plane symmetry connection edge strip of both sides before and after the base plate die holder, on the two ends of edge strip plane symmetry connection guide pillar lower end,
Guide pin bushing is socketed on guide pillar, guide pin bushing is fixed in the hole of collapsible form, the lower plane of collapsible form connection movable mold, and positioned at it is preceding,
Between rear side guide pillar, the upper in-plane connection sliding seat lower plane of the collapsible form, the expansion link of the cylinder of plane connection thereon,
The expansion link of cylinder runs through upper die plate, and the base of cylinder is fixed in the upper plane of upper die plate, and the upper die plate is fixed in guide pillar top
End.
Further, one end level of described base plate die holder is provided inwardly with 5 bottoming holes, and its other end level is provided inwardly with
Two roads water hole, 5 described bottoming holes are in same level, and two described road water holes are in another horizontal plane, described two
Road water hole is U-shape structure, wherein U-shaped water hole is located at the outside in the U-shaped water hole in another road, the delivery port in two road water hole together
With same one end that water inlet is respectively positioned on base plate die holder.
Further, 5 described bottoming holes are in same level, and two described road water holes are in another horizontal plane, institute
The top that the horizontal plane residing for 5 bottoming holes is located at base plate die holder is stated, the horizontal plane residing for two road water hole is located at base plate mould
The lower section of seat, and bottoming hole mutually staggers arranged in a crossed manner with water hole.
Further, the groove formed with base plate die holder between front and rear side strip after described movable mold is moved down with collapsible form
Coordinate.
Further, one end level of described movable mold is provided inwardly with 4 bottoming holes, its other end level be provided inwardly be in
Heating tube is installed, the import and export in any road water hole is all connected with water fittings, described in S type curves water hole, the bottoming hole
The axial line horizontal plane of bottoming hole is located at the lower section of movable mold, and the axial line horizontal plane in the water hole is located at the top of movable mold,
And bottoming hole mutually staggers arranged in a crossed manner with water hole.
Further, described cooling tower passes through water pipe and supply-water pump for some pre- hot-dies provide cold water, and cold water is entered into
Behind water hole in the base plate die holder and movable mold of pre- hot-die, it is cooled down, it is ensured that the product of the acrylic board after preheating
Matter, and pre- hot-die is heated by heating tube, and adding for the heating tube in pre- hot-die, is controlled by Intelligent temperature control box
Hot temperature, can absorb the temperature in pre- hot-die after cold water enters pre- hot-die, prevent pre- hot-die from overheating and damaging acrylic board, and
Cold water after heat absorption becomes hot water, then is pumped back to cooling tower by water pipe and backwater, hot water is cooled down using cooling tower, so
Recycling afterwards.
Compared with prior art, the beneficial effects of the utility model are：With compact conformation, thinking is novel, by water distribution
The hot water that device sprays fall in water dispersing disc through upper flabellum it is air-cooled after, drain on the radiator of rotation, through slowly running for radiator,
The time of contact of extension hot water and air, and the rotation of radiator produces air flow, accelerates hot water cooling velocity, in addition hot water
The lower flabellum for falling rotation from radiator increases hot water skyborne dead time, and lower flabellum and radiator rotating Vortex,
Accelerate air flow, further improve the radiating rate of hot water, while the hot Hydroenergy collecting of gap outflow is in water-receiving tray,
Saving water resource, reduces production cost, and the acrylic board one side that pre- hot-die breaks traditions preheats bending, also with prior art phase
Than, it is quick with heating, and water makes movable mold following table in movable mold by heating zone and the curve water hole of base plate die holder
Face and base plate die holder upper surface thermally equivalent, can guarantee that acryl plates surface quality, reduce the warpage of sub- gram plate, it is ensured that its plate
Surface evenness, in addition guide pin bushing can guarantee that collapsible form is moved horizontally up and down, it is to avoid upper stuck phenomenon, external Intelligent temperature control box can be led to
To control the heating-up temperature of heating tube, total physical efficiency energy saving beneficial to environmental protection, to reduce production cost.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of preheating for acrylic board bending and cooling system.
Fig. 2 is the structural representation of radiator.
Fig. 3 is the structural representation of water dispersing disc.
Fig. 4 is the structural representation of base plate die holder.
Fig. 5 is the structural representation of portable plate.
Specific embodiment
A kind of preheating and cooling system for acrylic board bending, including cooling tower a, pre- hot-die b, pump c, bus-bar d,
The cooling tower a include water-receiving tray a1, support a2, housing a3, lower flabellum a4, radiator a5, water dispersing disc a6, water-locator a7,
Upper flabellum a8, motor a9, water-receiving tray a1 inner sides connecting bracket a2 lower ends, support a2 upper ends connection housing a3 lower edges,
Middle part in housing a3 sets radiator a5, in the housing a3 above radiator a5 in connection water dispersing disc a6, the housing a3 also
The supervisor of connection water-locator a7, water-locator a7 through housing a3 and positioned at the top of water dispersing disc a6, lead to by the housing a3 upper ports
The rotating shaft for crossing upper frame a901 connections motor a9, motor a9 connects main shaft a902 upper ends by shaft coupling, and main shaft a902 lower ends pass through
Liner a301, the upper flabellum a8 of main shaft a902 tops connection of bearing connection housing, flabellum a4, described under the connection of its underpart
Water-receiving tray a1 outsides are provided with outlet pipe a101, and are communicated to the inside of water-receiving tray a1；The outlet pipe a101 passes through water pipe
Connection supply-water pump c2, supply-water pump c2 connect total water inlet port of bus-bar d2 by water pipe, and the water end (W.E.) mouthful that separates of bus-bar d2 leads to
Interior and the interior water hole loop ends for setting of movable mold b6 the water inlet water fittings b3 of base plate die holder b1 that flexible pipe connects pre- hot-die b are crossed,
The water outlet water nozzle joint at the water hole loop end set in the base plate die holder b1 of pre- hot-die and in movable mold b6 is connected by flexible pipe and converged
Point water inlet port of stream row d2, total water outlet port of bus-bar d2 connects back water pump c1 by water pipe, and back water pump c1 passes through water pipe
The supervisor outer end of connection cooling tower a upper water distributors a7.
Further, described housing a3 includes that liner a301, gap a302, the liner a301 are connected to housing a3's
Lower end inside, described gap a302 is symmetrically arranged at the top of housing a3, and through housing a3, described gap a302 with
Side opening a603 on described water dispersing disc a6 overlaps.
Further, described radiator a5 is made up of beam barrel a501 and blade a502, the outer round surface of the beam barrel a501
Upper radial symmetric connects some blade a502, and the blade a502 undulates, the length of the blade a502 is less than beam barrel
The length of a501, the two-port of the beam barrel a501 connects main shaft a902 by bearing.
Further, described water dispersing disc a6 includes bottom outlet a601, sleeve a602, side opening a603, the bottom of the water dispersing disc a6
Portion is provided with some bottom outlet a601, the bottom centre branch sleeve a602 of the water dispersing disc a6 and through the bottom of water dispersing disc a6, institute
State and side opening a603 is arranged with the side wall of water dispersing disc a6, the water dispersing disc a6 is fixed on the inwall of housing a3, and water dispersing disc
Gap a302 on the side opening a603 and housing a3 of a6 overlaps, and the sleeve a602 connects main shaft a902 by bearing.
Further, described motor a9 also includes that upper frame a901 and main shaft a902, the motor a9 are arranged on upper frame a901
On, upper frame a901 is fixed in the upper port of housing a3, and the main shaft a902 upper ends connect motor a9 rotating shafts by shaft coupling, under it
End connects liner a301 by bearing.
Further, described pre- hot-die b include base plate die holder b1, heating tube b2, water fittings b3, edge strip b4, guide pillar b5,
Movable mold b6, collapsible form b7, sliding seat b8, upper die plate 9, cylinder 10, if one end level of the base plate die holder 1 is provided inwardly with
Dry bottoming hole, if its other end level is provided inwardly with installing heating tube 2, any road water in arterial highway water hole, the bottoming hole
The import and export in hole is all connected with water fittings 3, the upper plane symmetry connection edge strip 4 of both sides before and after the base plate die holder 1, edge strip 4
Plane symmetry connection guide pillar 5 lower end, is socketed guide pin bushing 501 on two ends on guide pillar 5, and guide pin bushing 501 is fixed in the hole of collapsible form 7,
The lower plane connection movable mold 6 of collapsible form 7, and positioned between forward and backward side guide pillar 5, the upper in-plane of the collapsible form 7 connects
The lower plane of sliding seat 8 is connect, plane connects the expansion link of cylinder 10 thereon, the expansion link of cylinder 10 runs through upper die plate 9, cylinder 10
Base is fixed in the upper plane of upper die plate 10, and the upper die plate 10 is fixed in the top of guide pillar 5.
Further, one end level of described base plate die holder 1 is provided inwardly with 5 bottoming holes, and its other end level inwardly sets
There are two road water holes, 5 described bottoming holes are in same level, and two described road water holes are in another horizontal plane, described
Two roads water hole are U-shape structure, wherein U-shaped water hole is located at the outside in the U-shaped water hole in another road, the water outlet in two road water hole together
Mouth and water inlet are respectively positioned on same one end of base plate die holder 1.
Further, 5 described bottoming holes are in same level, and two described road water holes are in another horizontal plane, institute
The top that the horizontal plane residing for 5 bottoming holes is located at base plate die holder 1 is stated, the horizontal plane residing for two road water hole is located at base plate mould
The lower section of seat 1, and bottoming hole mutually staggers arranged in a crossed manner with water hole.
Further, described movable mold 6 moved down with collapsible form 7 after between front and rear side strip 4 with base plate die holder 1 formed
Groove fit.
Further, one end level of described movable mold 6 is provided inwardly with 4 bottoming holes, and its other end level is provided inwardly with
Heating tube 2 is installed, the import and export in any road water hole is all connected with water fittings 3 in S-type curve water hole, the bottoming hole,
The axial line horizontal plane of the bottoming hole is located at the lower section of movable mold 6, and the axial line horizontal plane in the water hole is located at movable mold 6
Top, and bottoming hole mutually staggers arranged in a crossed manner with water hole.
Further, described cooling tower passes through water pipe and supply-water pump for some pre- hot-dies provide cold water, and cold water is entered into
Behind water hole in the base plate die holder and movable mold of pre- hot-die, it is cooled down, it is ensured that the product of the acrylic board after preheating
Matter, and pre- hot-die is heated by heating tube, and adding for the heating tube in pre- hot-die, is controlled by Intelligent temperature control box
Hot temperature, can absorb the temperature in pre- hot-die after cold water enters pre- hot-die, prevent pre- hot-die from overheating and damaging acrylic board, and
Cold water after heat absorption becomes hot water, then is pumped back to cooling tower by water pipe and backwater, hot water is cooled down using cooling tower, so
Recycling afterwards.
Claims (10)
1. a kind of preheating and cooling system for acrylic board bending, including cooling tower, pre- hot-die, pump, bus-bar, its feature
It is that the cooling tower includes water-receiving tray, support, housing, lower flabellum, radiator, water dispersing disc, water-locator, upper flabellum, electricity
Machine, water-receiving tray inner side connecting bracket lower end, pedestal upper end connection housing lower margin, the middle part in housing sets radiating
Connection water dispersing disc in body, housing above radiator, is also connected with water-locator in the housing, the supervisor of water-locator through housing and
Positioned at the top of water dispersing disc, the housing upper port connects motor by upper frame, and the rotating shaft of motor connects main shaft by shaft coupling
Upper end, main shaft lower end connects the liner of housing by bearing, and the upper flabellum of main shaft top connection, its underpart connects lower flabellum,
Described water-receiving tray outside is provided with outlet pipe, and is communicated to the inside of water-receiving tray；The outlet pipe is connected by water pipe and supplied
Water pump, supply-water pump connects total water inlet port of bus-bar by water pipe, and the water end (W.E.) mouthful that separates of bus-bar connects preheating by flexible pipe
The water inlet water fittings at the water hole loop end set in the base plate die holder of mould and in movable mold, it is in the base plate die holder of pre- hot-die and living
The water outlet water nozzle joint at the water hole loop end set in dynamic model connects the port that point intakes of bus-bar by flexible pipe, bus-bar it is total
Water outlet port connects back water pump by water pipe, and back water pump connects the supervisor outer end of cooling tower upper water distributor by water pipe.
2. a kind of preheating and cooling system for acrylic board bending according to claim 1, it is characterised in that described
Housing include liner, gap, the liner is connected to the lower end inside of housing, and described gap is symmetrically arranged at housing
Top, and through housing, described gap overlaps with the side opening on described water dispersing disc.
3. a kind of preheating and cooling system for acrylic board bending according to claim 1, it is characterised in that described
Radiator be made up of beam barrel and blade, radial symmetric connects some blades on the outer round surface of the beam barrel, and the blade is in
Waveform, the length of the length less than beam barrel of the blade, the two-port of the beam barrel connects main shaft by bearing.
4. a kind of preheating and cooling system for acrylic board bending according to claim 1, it is characterised in that described
Water dispersing disc include bottom outlet, sleeve, side opening, the bottom of the water dispersing disc is provided with some bottom outlets, the bottom centre of the water dispersing disc
Branch sleeve and through water dispersing disc bottom, side opening is arranged with the side wall of the water dispersing disc, the water dispersing disc is fixed in shell
On the inwall of body, and the side opening of water dispersing disc overlaps with the gap on housing, and the sleeve connects main shaft by bearing.
5. a kind of preheating and cooling system for acrylic board bending according to claim 1, it is characterised in that described
Motor also include upper frame and main shaft, the motor be arranged on upper frame on, upper frame is fixed in the upper port of housing, on the main shaft
End connects machine shaft by shaft coupling, and its lower end connects liner by bearing.
6. a kind of preheating and cooling system for acrylic board bending according to claim 1, it is characterised in that described
Pre- hot-die include base plate die holder, heating tube, water fittings, edge strip, guide pillar, movable mold, collapsible form, sliding seat, upper die plate,
Cylinder, one end level of the base plate die holder is provided inwardly with some bottoming holes, if its other end level is provided inwardly with arterial highway water hole,
Heating tube is installed, the import and export in any road water hole is all connected with water fittings, before and after the base plate die holder in the bottoming hole
The upper plane symmetry connection edge strip of both sides, plane symmetry connection guide pillar lower end, is socketed guide pin bushing, guide pin bushing on the two ends of edge strip on guide pillar
It is fixed in the hole of collapsible form, the lower plane connection movable mold of collapsible form, and positioned between forward and backward side guide pillar, the activity
The upper in-plane connection sliding seat lower plane of template, the expansion link of the cylinder of plane connection thereon, the expansion link of cylinder is through upper
Template, the base of cylinder is fixed in the upper plane of upper die plate, and the upper die plate is fixed in guide pillar top.
7. a kind of preheating and cooling system for acrylic board bending according to claim 6, it is characterised in that described
One end level of base plate die holder be provided inwardly with 5 bottoming holes, its other end level is provided inwardly with two road water holes, described 5
Bottoming hole is in same level, and two described road water holes are in another horizontal plane, and two described road water holes are U-shape structure,
Wherein U-shaped water hole is located at the outside in the U-shaped water hole in another road together, and the delivery port and water inlet in two road water hole are respectively positioned on base plate
Same one end of die holder.
8. a kind of preheating and cooling system for acrylic board bending according to claim 7, it is characterised in that described
5 bottoming holes be in same level, described two road water holes are in another horizontal plane, the water residing for 5 bottoming holes
Plane is located at the top of base plate die holder, and horizontal plane residing for two road water hole is located at the lower section of base plate die holder, and bottoming hole with
Mutually stagger arranged in a crossed manner in water hole.
9. a kind of preheating and cooling system for acrylic board bending according to claim 6, it is characterised in that described
Movable mold moved down with collapsible form after between front and rear side strip with base plate die holder formed groove fit.
10. a kind of preheating and cooling system for acrylic board bending according to claim 6, it is characterised in that institute
One end level of the movable mold stated is provided inwardly with 4 bottoming holes, and its other end level is provided inwardly with S-type curve water hole, described
Heating tube is installed, the import and export in any road water hole is all connected with water fittings, the axial line water of the bottoming hole in bottoming hole
Plane is located at the lower section of movable mold, and the axial line horizontal plane in the water hole is located at the top of movable mold, and bottoming hole and water hole phase
Mutually stagger arranged in a crossed manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621211313.2U CN206242484U (en) | 2016-11-10 | 2016-11-10 | A kind of preheating and cooling system for acrylic board bending |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621211313.2U CN206242484U (en) | 2016-11-10 | 2016-11-10 | A kind of preheating and cooling system for acrylic board bending |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206242484U true CN206242484U (en) | 2017-06-13 |
Family
ID=58999362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621211313.2U Expired - Fee Related CN206242484U (en) | 2016-11-10 | 2016-11-10 | A kind of preheating and cooling system for acrylic board bending |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206242484U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202779A (en) * | 2019-05-21 | 2019-09-06 | 福建省锐驰电子科技有限公司 | A kind of production technology of PMMA arc-shaped plate and a kind of television stand |
| CN111016147A (en) * | 2019-12-31 | 2020-04-17 | 浙江威克特广告有限公司 | Heating equipment for bending acrylic plate |
-
2016
- 2016-11-10 CN CN201621211313.2U patent/CN206242484U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202779A (en) * | 2019-05-21 | 2019-09-06 | 福建省锐驰电子科技有限公司 | A kind of production technology of PMMA arc-shaped plate and a kind of television stand |
| CN110202779B (en) * | 2019-05-21 | 2022-03-11 | 福建省锐驰电子科技有限公司 | Production process of PMMA arc-shaped plate and television base |
| CN111016147A (en) * | 2019-12-31 | 2020-04-17 | 浙江威克特广告有限公司 | Heating equipment for bending acrylic plate |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170613 Termination date: 20181110 |