CN208786769U - The UV curing apparatus of automobile aluminum wheel hub - Google Patents
The UV curing apparatus of automobile aluminum wheel hub Download PDFInfo
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- CN208786769U CN208786769U CN201821394409.6U CN201821394409U CN208786769U CN 208786769 U CN208786769 U CN 208786769U CN 201821394409 U CN201821394409 U CN 201821394409U CN 208786769 U CN208786769 U CN 208786769U
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Abstract
The utility model discloses a kind of UV curing apparatus of automobile aluminum wheel hub, the UV curing apparatus includes electrostatic precipitation room, preheating chamber, colored paint paint spray booth, colored paint levelling and sudden strain of a muscle dry chamber, UV paints paint spray booth, UV paints levelling and dodges dry chamber, UV paints curing room, it is connected to the conveyer belt that transmitting workpiece is used between each station, drive the power device of conveyer belt movement, the preheating chamber and colored paint paint spray booth are connect with electrostatic precipitation room respectively, colored paint paint spray booth side is provided with First Transition room, the First Transition room connection colored paint levelling and sudden strain of a muscle dry chamber and UV paint paint spray booth, UV paint paint spray booth side is provided with the second transition chamber, the second transition chamber connection UV paint levelling and sudden strain of a muscle dry chamber and UV paint curing room.The utilization rate of technical solution according to the present utility model, energy greatly improves, and not only saves energy and is substantially reduced workpiece temperature rise, and heated time shortens, and is able to satisfy the solidifying requirements of different size aluminium wheels UV finishing varnish.
Description
Technical field
The utility model relates to Painting Technology for Automobile field more particularly to a kind of UV curing apparatus of automobile aluminum wheel hub.
Background technique
UV curing technology in auto industry using being the most successfully some component surface UV coatings, including plastics,
The substrates such as metal and timber.The coating varnish dosage of automobile case is larger, gets a good chance of being replaced with UV coating varnish traditional
A large amount of R&D work was done in this respect by baking-type coating varnish, Ford Motor Company, the U.S..Into after the 1990s,
With the rapid development of China's industry, the introduction of external advanced UV curing technology, material and facility has pushed China UVCC significantly
The development of production, UV cured powder paint and UV solidified aqueous coating have become the hot spot of research.From energy conservation and environmental protection and high-quality comprehensive
It closes and considers, UV solidifies the green coating technology that coating will gradually replace powder coating, eliminate oil paint coating and become mainstream.Research and development
Possess the UV solidification application techniques and technique of independent intellectual property right, the technical level for promoting China's paint industry has very
Significance.
Automobile aluminum wheel hub is very high to application techniques requirement, and existing aluminium wheels UV ultraviolet curing process occupation area of equipment is big,
Layout is not compact enough, and inadequate to the utilization rate of energy, energy-saving effect is bad；It needs to consume when carrying out polymerizing curable to coating
Time is longer, not only wastes the energy but also improves workpiece temperature rise, solidification temperature height will lead to wheel hub and become fragile, and mechanical strength is not
Enough, low-temperature setting may be implemented by the way that catalyst is added in powdery paints, but because reactivity is too big, sensitive to temperature anomaly,
There is no abundant levelling to begin to solidify, leads to open defect.
Utility model content
In view of the above problems, the object of the present invention is to provide a kind of UV curing apparatus of automobile aluminum wheel hub, equipment knots
Structure is compact, rationally distributed.
The utility model solves technical solution used by above-mentioned technical problem: a kind of UV solidification of automobile aluminum wheel hub is set
It is standby, including electrostatic precipitation room, preheating chamber, colored paint paint spray booth, colored paint levelling and sudden strain of a muscle dry chamber, UV paint paint spray booth, UV paints levelling and dodges
Dry chamber, UV paint curing room are connected between each station for the conveyer belt of transmitting workpiece, the power dress of driving conveyer belt movement
It sets, the preheating chamber and colored paint paint spray booth are connect with electrostatic precipitation room respectively, and colored paint paint spray booth side is provided with the first mistake
Room is crossed, the First Transition room connection colored paint levelling and sudden strain of a muscle dry chamber and UV paint paint spray booth, and UV paint paint spray booth side is provided with
Second transition chamber, the second transition chamber connection UV paint levelling and sudden strain of a muscle dry chamber and UV paint curing room.
Further, the electrostatic precipitation room, colored paint paint spray booth, First Transition room, the second transition chamber, UV paint paint spray booth are in
In same horizontal line.
Further, the conveyer belt passes sequentially through electrostatic precipitation room, preheating chamber, colored paint paint spray booth, First Transition room, colored paint
Levelling and sudden strain of a muscle dry chamber, UV paint paint spray booth, the second transition chamber, UV paint levelling and dodge dry chamber, UV paint curing room.
Further, ionization fan is equipped in the electrostatic precipitation room.
Further, the electrostatic precipitation room, preheating chamber, colored paint paint spray booth, First Transition room, colored paint levelling and dodge dry chamber,
Carrier chain hanger, the preheating are installed in UV paint paint spray booth, the second transition chamber, UV paint levelling and sudden strain of a muscle dry chamber, UV paint curing room
Infrared radiator is installed in room, colored paint levelling and sudden strain of a muscle dry chamber and UV paint levelling and sudden strain of a muscle dry chamber.
Further, several brackets and several infrared radiation panels are equipped in the infrared radiator, on several brackets
Infrared radiation panel is installed, the bracket is adjustable at a distance from workpiece.
Further, be provided with ultraviolet lamp device in UV paint curing room, the ultraviolet lamp device include ultraviolet lamp fluorescent tube,
Lampshade, ultraviolet lamp support, movable plate, manual lifting mechanism, the ultraviolet lamp support is mounted in UV paint curing room, described manual
Elevating mechanism is arranged on ultraviolet lamp support, and the manual lifting mechanism includes pedestal, lead screw, lead screw head and handwheel, the silk
Disputer is mounted on the position of centre of gravity of ultraviolet lamp support, and the lead screw is rotated and moved axially simultaneously, the lead screw head
It is mounted on lead screw, the handwheel is arranged on lead screw head, and the movable plate and pedestal are fixedly mounted, the ultraviolet lamp fluorescent tube peace
Mounted in movable plate bottom.
Further, the ultraviolet lamp fluorescent tube quantity is 6, surrounds workpiece top, lower part and each 2 of side, the purple of lower part 2
Outer lamp fluorescent tube height is adjustable, and top and side 4 are fixed on ultraviolet lamp support.
Utility model has the advantages that
(1) compact-sized, rationally distributed, equipment volume is small, saves space；Carrier chain walking path is simple, does not repeat, no
Intersect, equipment shape neat appearance；Using the First Transition room and the second transition chamber added, so that each technique from piece uploading to lower part
Not only orderly, workpiece has been in the environment of closed cleaning for relatively independent but also connection, meets UV solidification coating to environment cleanliness
Requirement.
(2) infrared heating technique (far infrared) applies radiant heating feature, and capacity usage ratio is greatly improved, thus obtains
Apparent energy-saving effect is obtained, the requirement to chamber body heat insulating ability substantially reduces, this set equipment chamber body insulation layer thickness is only 50mm；
(3) aluminium wheels UV photocuring technology causes coating rapid polymerization using high-intensity ultraviolet and solidifies, and curing time is only
Several seconds, this utilization rate of energy for coating greatly improves, and workpiece energy-absorbing then greatly reduces, not only save energy and
And it is substantially reduced workpiece temperature rise, heated time shortens, and the space for saving semi-finished product stacking is more able to satisfy extensive automation
The requirement of production, occupation area of equipment is small, small investment, produces processing line convenient for tissue；
(4) equipment is simple, easy to operate, and failure rate is low；
(5) solvent-free or contain only a small amount of solvent, volatile quantity is few, safety and reduces atmosphere pollution；
(6) aluminium wheels are complex-shaped, and appearance requirement is higher, and after the operation of this set production line, film performance is good, wearability,
Solvent resistance, corrosion resistance are significant.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is device structure schematic diagram of the invention.
Fig. 2 is infrared radiator arragement construction schematic diagram of the invention.
Fig. 3 is ultraviolet lamp arragement construction schematic diagram of the invention.
Fig. 4 is the front view that ultraviolet lamp of the invention is arranged.
Fig. 5 is the structural schematic diagram of manual lifting mechanism of the invention.
Wherein:
1, electrostatic precipitation room, 2, preheating chamber, 3, colored paint paint spray booth, 4, First Transition room, 5, colored paint levelling and sudden strain of a muscle dry chamber, 6,
UV paints paint spray booth, the 7, second transition chamber, 8, UV paint levelling and sudden strain of a muscle dry chamber, 9, UV paint curing room, 91, ultraviolet lamp fluorescent tube, 92, lamp
Cover, 93, ultraviolet lamp support, 94, manual lifting mechanism, 941, pedestal, 942, lead screw, 943, lead screw head, 944, handwheel, 95, work
Movable plate, 10, infrared radiator, 11, carrier chain hanger；
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
A kind of UV curing apparatus of automobile aluminum wheel hub as shown in Figs. 1-5, including electrostatic precipitation room 1, preheating chamber 2, colored paint
Paint spray booth 3, colored paint levelling and sudden strain of a muscle dry chamber 5, UV paint paint spray booth 6, UV paints levelling and dodges dry chamber 8, UV paints curing room 9, it is each to be connected to
For the conveyer belt of transmitting workpiece, the power device of driving conveyer belt movement, the preheating chamber 2 and colored paint paint spray booth between station
3 connect with electrostatic precipitation room 1 respectively, and ionization fan is equipped in the electrostatic precipitation room 1, and UV solidifies coating for painting environment
Purity requirements it is more stringent, if workpiece surface speckles with easily forms bubble after oil, water, dust in the coating, wheel hub at
During type, due to the relative motion occurred in demoulding with mold, hub surface is caused to carry electrostatic, to prevent Electrostatic Absorption
Filament cilium in air causes product surface to pollute, into must carry out electrostatic precipitation, electrostatic precipitation before people's coating wire body
0.01 μm~0.005 μm fine dust below can be removed, electrostatic is eliminated using ionization fan, ionization fan makes
The air of blowout carries a large amount of charges and hub surface charging neutrality, and it is reasonable that this process step design is characterized by lectotype selection, to blow
Ionized air out, which can cover entire workpiece, to be advisable, and advantage is that equipment is simple, and easy for installation, operating cost is extremely low, institute
It states 3 side of colored paint paint spray booth and is provided with First Transition room 4, the First Transition room 4 connects colored paint levelling and dodges dry chamber 5 and UV paint
Paint spray booth 6, the UV paint 6 side of paint spray booth are provided with the second transition chamber 7, and second transition chamber 7 connects UV paint levelling and dodges
Dry chamber 8 and UV paint curing room 9, and colored paint paint spray booth 3 and UV paint 6 side of paint spray booth are equipped with spray painting mouth, the electrostatic precipitation room 1, color
Paint paint spray booth 3, First Transition room 4, the second transition chamber 7, UV paint paint spray booth 6 are in same horizontal line, the electrostatic precipitation room
1, preheating chamber 2, colored paint paint spray booth 3, First Transition room 4, colored paint levelling and dodge dry chamber 5, UV paint paint spray booth 6, the second transition chamber 7,
UV paints levelling and dodges dry chamber 8, UV is painted and is equipped with carrier chain hanger 11 in curing room 9, and the preheating chamber 2, colored paint levelling and sudden strain of a muscle are dry
Infrared radiator 10 is installed in room 5 and UV paint levelling and sudden strain of a muscle dry chamber 8, is equipped with several brackets in the infrared radiator 10
With several infrared radiation panels, due to aluminium wheels complex contour, to be heated evenly coating, carrier chain hanger 11 when on the one hand designing
Can 360 ° of rotations, on the other hand, infrared radiation panel must rationally arrange, so that it is radiated each coat side of wheel hub, do not stay yin
Shadow zone and dead angle, therefore infrared radiation panel is installed on several brackets, the bracket is adjustable at a distance from workpiece, meets not
With the needs of structure size workpiece, it is provided with ultraviolet lamp device in the UV paint curing room 9, the ultraviolet lamp device includes ultraviolet
Lamp fluorescent tube 91, lampshade 92, ultraviolet lamp support 93, movable plate 95, manual lifting mechanism 94, the ultraviolet lamp support 93 are mounted on UV
It paints in curing room 9, the manual lifting mechanism 94 is arranged on ultraviolet lamp support 93, and the manual lifting mechanism 94 includes pedestal
941, lead screw 942, lead screw head 943 and handwheel 944, the lead screw head 943 are mounted on the position of centre of gravity of ultraviolet lamp support 93, institute
It states lead screw 942 while rotating and moving axially, the lead screw head 943 is mounted on lead screw 942, and the handwheel 944 is set
It sets on lead screw head 943, the movable plate 95 is fixedly mounted with pedestal 941, and the ultraviolet lamp fluorescent tube 91 is mounted on movable plate 941
Bottom, 91 quantity of ultraviolet lamp fluorescent tube are 6, surround workpiece top, lower part and each 2 of side, the ultraviolet lamp fluorescent tube of lower part 2
91 height are adjustable, and top and side 4 are fixed on ultraviolet lamp support 93, and the design of ultraviolet lamp support 93 has 2 advantages, first is that
Support Design is integral installation structure, and in-site installation is facilitated to fix；Second is that bracket by manual lifting mechanism 94 can easily on
Lower adjustment position, time saving and energy saving, solving ultraviolet lamp position need to frequently adjust, and the problem of more people's operations, UV solidification is photocuring
The last part of coating will lead to the irreversible failure of whole process if the control of this step is bad, because UV film receives
The energy of the light arrived and it is related with the distance between ultraviolet lamp fluorescent tube 91, i.e. UV film is closer from ultraviolet lamp fluorescent tube 91, receives
Energy it is higher, meanwhile, as far as possible using the small fluorescent tube of diameter, can make in this way in arrangement energy be more evenly distributed and
The UV luminous energy that can be more effectively issued using fluorescent tube, to improve energy density, the selection and arrangement of UV lamp should be according to carrier chains
The speed of service of hanger 11 considers, drives lead screw 942 to be axially moved to adjust manual lifting mechanism 94 by handwheel 944
Vertical height, and then the distance that quartz burner 91 arrives UV film is adjusted, the conveyer belt passes sequentially through electrostatic precipitation room 1, preheating
Room 2, colored paint paint spray booth 3, First Transition room 4, colored paint levelling and sudden strain of a muscle dry chamber 5, UV paint paint spray booth 6, the second transition chamber 7, UV paint flow
Flat to paint curing room 9 with sudden strain of a muscle dry chamber 8, UV, conveyer belt utilizes motor driven.
The production technology of the UV curing apparatus of automobile aluminum wheel hub, comprising the following steps:
1) piece uploading: workpiece to be painted is put by conveyer belt using manual type, wipes workpiece surface first with alcohol
Only；
2) electrostatic precipitation: the workpiece of wiped clean by electrostatic precipitation room 1, is carried out electrostatic under room temperature and removed by conveyer belt
Dirt；
3) it preheats: the workpiece in step 2) after electrostatic precipitation being sent to preheating chamber 2 and is preheated, preheating temperature 45
~55 DEG C, preheating time 4min；
4) color spray paint: the workpiece after will be preheated in step 3) is sent to colored paint paint spray booth 3, carries out color spray at normal temperature
Paint adjusts the spray regime and spray painting flow of spray gun, takes hand spray by the mouth that paints, conveyer belt passes through colored paint paint spray booth
Travel time be 8min；
5) colored paint levelling+sudden strain of a muscle is dry: the workpiece in step 4) after color spray paint being sent to colored paint levelling and dodges the progress of dry chamber 5
Technique is done in colored paint levelling+sudden strain of a muscle, and technological temperature is 80~100 DEG C, heating time 8min, and conveyer belt is by colored paint levelling and dodges dry
The travel time of room 5 is 10min, guarantees that the temperature up and down of conveyer belt is uniform, and paint is in surface tension effects while baking
Lower levelling；
6) spray UV paint: the workpiece through colored paint levelling+Shan Ganhou in step 5) is sent to UV paint paint spray booth 6 and carries out spray UV paint
Technique carries out spray UV lacquer craftwork at normal temperature, adjusts the spray regime and spray painting flow of spray gun, mouth is taken manually by painting
It is sprayed, conveyer belt is 8min by the travel time that UV paints paint spray booth 6；
7) it is dry to paint levelling+sudden strain of a muscle by UV: the workpiece in step 6) after spraying UV paint being sent to UV paint levelling and dodges the progress of dry chamber 8
UV paints levelling+sudden strain of a muscle and does technique, and technological temperature is 80~100 DEG C, heating time 8min, and conveyer belt paints levelling by UV and dodges dry
The travel time of room 8 is 10min, guarantees that the temperature up and down of workpiece is uniform, and paint is under surface tension effects while baking
Levelling；
Experiment shows: when dry temperature condition is 80 DEG C, the time that surface drying needs is 10min；
8) UV paint solidifies: the workpiece through UV paint levelling+Shan Ganhou in step 7) being sent to UV paint curing room 9 and carries out UV paint
Curing process, the irradiation energy of the colored varnish are 750~10000mJ/cm2, the workpiece after spray painting is carried out using quartz burner
Irradiation, irradiation temperature are 80~100 DEG C, irradiation time 5min, ultraviolet lamp fluorescent tube 91 used by the UV paint curing schedule
It is 5~10 times of 91 diameters of ultraviolet lamp fluorescent tube, the present embodiment middle-ultraviolet lamp fluorescent tube 91 with the distance between the UV film coated on workpiece
Irradiation energy be 9000mj/cm2；
9) lower part lower part: is carried out using manual type.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (8)
1. a kind of UV curing apparatus of automobile aluminum wheel hub, which is characterized in that including electrostatic precipitation room, preheating chamber, colored paint paint spray booth,
It colored paint levelling and dodges dry chamber, UV paint paint spray booth, UV paint levelling and dodges dry chamber, UV paint curing room, is connected between each station and is used for
The power device that conveyer belt, the driving conveyer belt of transmitting workpiece move, the preheating chamber and colored paint paint spray booth are removed with electrostatic respectively
The connection of dirt room, colored paint paint spray booth side are provided with First Transition room, and the First Transition room connection colored paint levelling and sudden strain of a muscle are dry
Room and UV paint paint spray booth, and UV paint paint spray booth side is provided with the second transition chamber, and the second transition chamber connection UV paints levelling
Curing room is painted with sudden strain of a muscle dry chamber and UV.
2. a kind of UV curing apparatus of automobile aluminum wheel hub according to claim 1, which is characterized in that the electrostatic precipitation
Room, colored paint paint spray booth, First Transition room, the second transition chamber, UV paint paint spray booth are in same horizontal line.
3. a kind of UV curing apparatus of automobile aluminum wheel hub according to claim 1, which is characterized in that the conveyer belt is successively
By electrostatic precipitation room, preheating chamber, colored paint paint spray booth, First Transition room, colored paint levelling and dodge dry chamber, UV paint paint spray booth, second
Transition chamber, UV paint levelling and sudden strain of a muscle dry chamber, UV paint curing room.
4. a kind of UV curing apparatus of automobile aluminum wheel hub according to claim 1, which is characterized in that the electrostatic precipitation room
It is interior to be equipped with ionization fan.
5. a kind of UV curing apparatus of automobile aluminum wheel hub according to claim 1, which is characterized in that the electrostatic precipitation
Room, preheating chamber, colored paint paint spray booth, First Transition room, colored paint levelling and sudden strain of a muscle dry chamber, UV paint paint spray booth, the second transition chamber, UV paint flow
It puts down and carrier chain hanger is installed in sudden strain of a muscle dry chamber, UV paint curing room, the preheating chamber, colored paint levelling and sudden strain of a muscle dry chamber and UV paint levelling
Infrared radiator is installed with dodging in dry chamber.
6. a kind of UV curing apparatus of automobile aluminum wheel hub according to claim 5, which is characterized in that the infrared radiation
It is equipped with several brackets and several infrared radiation panels in device, infrared radiation panel, the bracket and work are installed on several brackets
The distance of part is adjustable.
7. a kind of UV curing apparatus of automobile aluminum wheel hub according to claim 1, which is characterized in that the UV paints curing room
It is inside provided with ultraviolet lamp device, the ultraviolet lamp device includes ultraviolet lamp fluorescent tube, lampshade, ultraviolet lamp support, movable plate, rises manually
Descending mechanism, the ultraviolet lamp support are mounted in UV paint curing room, and the manual lifting mechanism is arranged on ultraviolet lamp support, institute
Stating manual lifting mechanism includes pedestal, lead screw, lead screw head and handwheel, and the lead screw head is mounted on the position of centre of gravity of ultraviolet lamp support
On, the lead screw is rotated and is moved axially simultaneously, and the lead screw head is mounted on lead screw, and the handwheel is arranged in lead screw
On head, the movable plate and pedestal are fixedly mounted, and the ultraviolet lamp fluorescent tube is mounted on movable plate bottom.
8. a kind of UV curing apparatus of automobile aluminum wheel hub according to claim 7, which is characterized in that the ultraviolet lamp fluorescent tube
Quantity is 6, surrounds workpiece top, lower part and each 2 of side, lower part 2 ultraviolet lamp fluorescent tube height adjustable, top and side 4
It is a to be fixed on ultraviolet lamp support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821394409.6U CN208786769U (en) | 2018-08-28 | 2018-08-28 | The UV curing apparatus of automobile aluminum wheel hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821394409.6U CN208786769U (en) | 2018-08-28 | 2018-08-28 | The UV curing apparatus of automobile aluminum wheel hub |
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| Publication Number | Publication Date |
|---|---|
| CN208786769U true CN208786769U (en) | 2019-04-26 |
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ID=66207224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821394409.6U Active CN208786769U (en) | 2018-08-28 | 2018-08-28 | The UV curing apparatus of automobile aluminum wheel hub |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108745754A (en) * | 2018-08-28 | 2018-11-06 | 天津七所高科技有限公司 | The UV curing apparatus and technique of automobile aluminum wheel hub |
| CN111822203A (en) * | 2020-07-20 | 2020-10-27 | 浙江万丰摩轮有限公司 | Intelligent coating production line for aluminum alloy wheel hub of motorcycle |
-
2018
- 2018-08-28 CN CN201821394409.6U patent/CN208786769U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108745754A (en) * | 2018-08-28 | 2018-11-06 | 天津七所高科技有限公司 | The UV curing apparatus and technique of automobile aluminum wheel hub |
| CN111822203A (en) * | 2020-07-20 | 2020-10-27 | 浙江万丰摩轮有限公司 | Intelligent coating production line for aluminum alloy wheel hub of motorcycle |
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