CN114472002B - Additive powder spraying device for rubber-coated dumbbell - Google Patents
Additive powder spraying device for rubber-coated dumbbell Download PDFInfo
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- CN114472002B CN114472002B CN202111104080.1A CN202111104080A CN114472002B CN 114472002 B CN114472002 B CN 114472002B CN 202111104080 A CN202111104080 A CN 202111104080A CN 114472002 B CN114472002 B CN 114472002B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
- B05B13/0264—Overhead conveying means, i.e. the object or other work being suspended from the conveying means; Details thereof, e.g. hanging hooks
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/06—User-manipulated weights
- A63B21/072—Dumb-bells, bar-bells or the like, e.g. weight discs having an integral peripheral handle
- A63B21/0726—Dumb bells, i.e. with a central bar to be held by a single hand, and with weights at the ends
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/60—Ventilation arrangements specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
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Abstract
The invention discloses a material increase powder spraying device of an encapsulated dumbbell, which comprises a powder spraying chamber, wherein a suspension type conveyor penetrates through the powder spraying chamber, and the material increase powder spraying device is characterized in that the powder spraying chamber is also provided with a powder atomization system, and the material increase powder spraying device comprises: the powder atomizer, the gas circulation device, the air pressure controller, the temperature controller, the air pressure controller and the temperature controller form a high-temperature low-pressure area on a suspension path of the suspension type conveyor, and the powder-gas mixture is promoted to form liquefied particles in the high-temperature low-pressure area and then adsorbed on high-temperature workpieces conveyed by the suspension type conveyor. The invention has the beneficial effects that: the atomized powder-gas mixture is attached to a high-temperature workpiece through physical adsorption to form an even plastic coating layer, the phenomenon that the consumption of plastic dipping liquid is large and waste in the original plastic dipping process is changed, the length of a plastic dipping production line is shortened, energy is saved, environment is protected, the problem that the plastic dipping thickness cannot be controlled is solved, and the purpose of increasing a plastic layer on the surface of a metal dumbbell is achieved.
Description
Technical Field
The invention belongs to the technical field of metal surface additive machining, and particularly relates to an additive powder spraying device for an encapsulated dumbbell, which is applied to dumbbell surface machining.
Background
At present, the surface additive machining of the dumbbell is mainly realized by a plastic dipping mode, and the plastic dipping mode is also called plastic coating, hot dipping plastic and hot compress plastic coating. Plastic dipping or coating is a plastic coating process. According to different raw materials used for plastic dipping, the plastic can be divided into liquid dipping (coating) plastic and powder dipping (coating) plastic. The liquid plastic dipping process adopts thermoplastic plastic dipping liquid mostly, a thermoplastic plastic coating film has the characteristics of preheating, softening, cooling and curing to form a film, and the physical melting plasticizing film forming process is mainly adopted, so that the processing and the production are simpler. The most typical common polyvinyl chloride (PVC) plastic dipping liquid is prepared by mixing polyvinyl chloride (PVC) with more than 10 high-grade additives and synthetic raw materials of additives according to the strict proportion, and carrying out fine mixing and reaction refining.
However, the plastic dipping has the following disadvantages:
1. the baking temperature is high, which sometimes affects the hardness or generates deformation of the workpiece, so that the plastic-impregnated processing technology is not suitable for the workpiece which can not resist high temperature (160 to 280 ℃).
2. Because the color of the coating needs to be changed by soaking and molding in the grooves, the product which requires frequent change of the color of the coating is not suitable for adopting a liquid soaking and molding processing technology.
3. Products which can not sink in the plastic dipping liquid are not suitable for the plastic dipping processing technology.
4. For cast iron workpieces with air holes in the matrix, the defects of bubbling and air holes are easy to generate during plastic dipping, so the cast iron workpieces cannot be subjected to plastic dipping.
5. The operation of large-scale workpieces is complex, and the quality of plastic coating is not easy to guarantee, so the plastic coating is not suitable for the integral or local plastic dipping of the large-scale workpieces.
6. The liquid plastic-dipped film is not suitable for products requiring film coating because of large thickness of the film.
7. Needs preheating and curing, so the heat preservation equipment is more, the production line is long, and the occupied area is large.
Particularly, the problem that the liquid plastic-dipped film is large in thickness and is not suitable for products requiring thin film coating is that the thickness of the film of the product cannot be controlled, the shape of the product after forming cannot be controlled, and the quality of the product cannot be accurately controlled.
In the traditional electrostatic coating process, one is to adsorb powder on a workpiece and then enter a curing furnace for curing, and in the production of the mode, when the workpiece leaves a coating station, the powder is easy to fall off from the workpiece, the coating thickness is influenced, and the coating thickness cannot be controlled; the other is that the liquid is atomized and adsorbed on the workpiece and then enters a curing furnace for curing, in the production of the mode, the raw material must be liquid, and the plastic exists in a solid form in practical application, so that the production is not facilitated.
In summary, the material increase powder spraying device for the rubber-coated dumbbell is urgently needed to reduce the phenomena of large consumption and waste of plastic dipping liquid, shorten the length of a plastic dipping production line, solve the problem that the plastic dipping thickness cannot be controlled, and realize the plastic dipping of powder.
Disclosure of Invention
The objects to be achieved by the present invention are: the plastic dipping liquid consumption is reduced, the waste phenomenon is avoided, the length of a plastic dipping production line is shortened, the problem that the plastic dipping thickness cannot be controlled is solved, and the plastic dipping of powder is realized.
In order to achieve the above object, the present invention provides an additive powder spraying device for an encapsulated dumbbell.
The invention adopts the following specific technical scheme:
the utility model provides a vibration material disk powder of rubber coating dumbbell spouts device, includes the powder spray booth, what run through in the powder spray booth is equipped with the suspension type conveyer, the powder spray booth still is equipped with powder atomizing system, includes:
the powder atomizer is fixed on the side wall of the powder spraying chamber and sprays a powder-gas mixture of powder and air into the powder spraying chamber after atomizing;
the gas circulation device is fixed at the top and the bottom of the powder spraying chamber and forms circulating gas in the powder spraying chamber;
the air pressure controller comprises an air exhaust device and is fixed on the suspension type conveyor bracket in the powder spraying chamber, and the suspension type conveyor bracket is also provided with a pressure sensor;
the temperature controller comprises a heating device and is fixed on the suspension type conveyor bracket in the powder spraying chamber, and the suspension type conveyor bracket is also provided with a temperature sensor;
the air pressure controller and the temperature controller form a high-temperature low-pressure area on a suspension path of the overhead conveyor, and liquefied particles formed by the powder-gas mixture in the high-temperature low-pressure area are enabled to be adsorbed on the high-temperature workpieces conveyed by the overhead conveyor.
The adsorption effect is closely related to the nature and surface size of the adsorbent, the nature and concentration of the adsorbate, and the temperature. For example, the active carbon has large surface area and strong adsorption effect, and is easy to adsorb gas with high boiling point and difficult to adsorb gas with low boiling point.
Adsorption between adsorbate molecules and adsorbent surface atoms or molecules by physical force. Such physical forces are van der waals forces, which include dispersive, electrostatic and induced forces. For adsorbates and adsorbents that are not very polar, dispersion forces play a major role in physical adsorption. When polar molecules interact with the surface of an adsorbent with electrostatic charge or the electronic structures of the adsorbent and the surface molecules of the adsorbent are changed due to the interaction of the adsorbent and the surface molecules of the adsorbent to generate dipole moments, the directional force and the induction force also play an important role in physical adsorption. Sometimes adsorbate molecules physically adsorb to the surface of the adsorbent in the form of hydrogen bonds.
Physical adsorption has the characteristics that (1) the physical adsorption of gas is similar to the liquefaction of gas and the condensation of steam, so the heat of physical adsorption is smaller and is similar to the heat of liquefaction of corresponding gas, (2) the higher the boiling point of gas or steam or the lower the saturated steam pressure is, the easier the gas or steam is to liquefy or condense, and the larger the physical adsorption amount, (3) the physical adsorption generally does not need activation energy, so the adsorption and desorption rates are faster;
therefore, the key point of controlling the thickness of the plastic dipping by powder spraying and plastic dipping is to control the physical adsorption result, and the following measures are adopted for the invention:
firstly, performing sand blasting treatment on a workpiece to form dense tiny pits with the diameter less than 0.5 mm on the surface of the workpiece, so that the contact area of the workpiece and powder gas compounds is increased, and the adsorption force is increased;
the powder atomizer is fixed on the side wall of the powder spraying chamber and sprays a powder-gas mixture of powder and air into the powder spraying chamber after atomizing; the powder atomizer is adopted to atomize the raw material plastic powder used by the invention, a fluidized bed in the traditional plastic dipping is replaced, and the powder-gas mixture is sprayed into the powder spraying chamber to fill the powder spraying chamber, so that the preheated workpiece is immersed in the powder-gas mixture, and the purpose of plastic dipping is realized.
-gas circulation means fixed to the top and bottom of the powder injection chamber to form a circulating gas in the powder injection chamber; as the powder in the powder-gas mixture continuously settles under the action of self gravity, and finally falls on the bottom of the powder spraying chamber when the powder arrives, the gas circulation device is arranged, so that gas circulation is formed in the powder spraying chamber, the powder-gas mixture moves along with the gas circulation in the powder spraying chamber and is always filled in the powder spraying chamber, and the plastic dipping thickness is not influenced by the settling problem.
The air pressure controller comprises an air exhaust device and is fixed on the suspension type conveyor support in the powder spraying chamber, and a pressure sensor is further arranged on the suspension type conveyor support; and forming a low-pressure area around the preheated workpiece, wherein the pressure is lower than that in the powder spraying chamber, so that the powder-gas mixture in the circulation continuously moves to the low-pressure area, and the condition that sufficient powder-gas mixture is supplied to the preheated workpiece for adsorption is ensured.
The temperature controller comprises a heating device and is fixed on the suspension type conveyor bracket in the powder spraying chamber, and the suspension type conveyor bracket is also provided with a temperature sensor;
since, in a closed condition, the pressure of a vapor in phase equilibrium with a solid or liquid at a certain temperature is called a saturated vapor pressure. The same substance has different saturated vapor pressures at different temperatures and increases with increasing temperature. The saturated vapor pressure of pure solvent is larger than that of solution, and for the same substance, the saturated vapor pressure of solid state is smaller than that of liquid state.
According to the principle, a low-pressure area is formed around the preheated workpiece through the air pressure controller, then a high-temperature area is formed around the preheated workpiece through the temperature controller, the temperature of the high-temperature area is higher than the temperature of the powder spraying chamber and higher than the melting point of plastic, so that a condition close to the saturated vapor pressure of the plastic powder is formed around the workpiece, meanwhile, the powder in the powder-gas mixture is liquefied at high temperature, the adsorption force is further improved, and the plastic powder is more easily adsorbed on the workpiece. Meanwhile, the liquefied plastic powder cannot fall off when leaving the powder spraying chamber.
The air pressure controller and the temperature controller form a high-temperature low-pressure area on a suspension path of the overhead conveyor, and liquefied particles formed by the powder-gas mixture in the high-temperature low-pressure area are enabled to be adsorbed on the high-temperature workpieces conveyed by the overhead conveyor.
In addition, the raw material of the powder spray is polyethylene thermoplastic powder coating. As the material for dumbbell production, polyethylene thermoplastic powder coating is the preferred powder spray raw materials, polyethylene plastic powder namely polyethylene powder coating, it is a kind of thermoplastic powder coating, it is a kind of powder coating that is made up by using PE resin as main raw materials, adding certain compounding chemicals, pigment, filler through certain process, the coating film has chemical medicines such as acid-proof, alkali, salt, etc., electrical insulation performance and cold resistance, and have certain mechanical strength and flexibility, the price is relatively cheap in general, suitable for thick coating; meanwhile, the coating is flat, smooth, plump, nontoxic and pollution-free, and is a novel coating which saves resources and energy.
As a further improvement of the invention, the powder atomizer is provided with an atomizing nozzle, and the powder gas mixture rubs with the atomizing nozzle when passing through the atomizing nozzle, so that the powder in the powder gas mixture is charged with static electricity. According to the principle of friction electricity generation, when passing through the atomizing nozzle at a high speed, the plastic powder generates high-speed friction with the nozzle, the atomizing nozzle is provided with narrow atomizing holes, the friction between the atomizing nozzle and the plastic powder is further enhanced, the atomized powder has static electricity, the effect of electrostatic coating is realized, and the plastic powder is more favorably adsorbed on a preheated workpiece.
As a further development of the invention, the heating device heats the powder-air mixture on the suspended path of the ceiling-mounted conveyor with infrared light of a wavelength of 3 to 5 μm. Since most plastics exhibit good infrared absorption at wavelengths of 2-10 microns, it is preferred in the present invention that infrared at wavelengths of 3-5 microns heat the powder air mixture on the overhead conveyor's overhead path.
As a further development of the invention, the heating device is provided with an infrared radiation ceramic heating plate by means of which the powder-gas mixture on the suspension path of the ceiling-mounted conveyor is heated. Wherein the heating temperature of the infrared radiation ceramic is set to 600-700 ℃, the melting temperature of the plastic powder is controlled to 200-300 ℃, the low heating effect is controlled by the high heating temperature, a more stable heating environment is realized, and the full liquefaction of the plastic powder is ensured.
As a further improvement of the invention, the air exhaust device is fixedly provided with a plurality of air exhaust pipes, the air exhaust pipes are arranged on two sides of the suspension type conveyor in a bell mouth manner, and the pipe orifices of the air exhaust pipes are inclined downwards. According to the design, a plurality of extraction points can be realized above the preheated workpiece, so that the air flow in the low-pressure area is performed towards the square of a plurality of points, the powder-air mixture in the powder spraying chamber can better flow to the preheated workpiece, and the adsorption of plastic powder is facilitated.
As a further improvement of the invention, the air pressure controller is provided with an air supply pipe on the heating device. By adopting the design, small circulation flow can be formed around the preheated workpiece, so that the liquefied powder-gas mixture can uniformly flow around the preheated workpiece, and the control of the thickness and uniformity of plastic dipping of the workpiece is facilitated.
The invention has the positive effects that: the atomized powder-gas mixture is attached to a high-temperature workpiece through physical adsorption to form an even plastic coating layer, the phenomenon that the consumption of plastic dipping liquid is large and waste in the original plastic dipping process is changed, the length of a plastic dipping production line is shortened, energy is saved, environment is protected, the problem that the plastic dipping thickness cannot be controlled is solved, and the purpose of increasing a plastic layer on the surface of a metal dumbbell is achieved.
Drawings
FIG. 1 is a three-dimensional schematic view of an additive powder spray apparatus for an encapsulated dumbbell of the present invention;
FIG. 2 is a front view of the additive powder spraying device of an encapsulated dumbbell of the present invention shown in FIG. 1;
FIG. 3 is a side view of the additive powder spray device of an encapsulated dumbbell of the present invention shown in FIG. 2;
FIG. 4 isbase:Sub>A cross-sectional view of an additive powder spray device A-A of an encapsulated dumbbell of the present invention as shown in FIG. 2;
FIG. 5 is an enlarged view of the encapsulated dumbbell additive powder spraying device B of FIG. 2;
FIG. 6 is a schematic diagram of airflow direction of a powder spray chamber B of the encapsulated dumbbell additive powder spray device of the invention shown in FIG. 2;
illustration of the drawings: the powder gas mixing device comprises a powder gas mixing machine, a suspension type conveyor, a gas circulation device, a first air extractor, a first air blowing device, a powder spraying chamber, a hook, a second air blowing opening device, a first infrared heating plate, a support, a second air extractor, a pressure sensor, a temperature sensor, a first powder gas mixture interface, a compressed air interface, a second powder gas mixture interface and a powder atomizer, wherein the first air extractor is 301, the first air extractor is 302, the first air blowing device is 4, a powder spraying chamber is 401, the hook is 402, the second air blowing opening device is 403, an infrared heating plate is 404, the support is 405, the second air extractor is 406, the pressure sensor is 407, the temperature sensor is 408, the first powder gas mixture interface is 409, the compressed air interface is 410, the second powder gas mixture interface and the powder atomizer is 5.
Detailed Description
The invention is described in detail below with reference to the following figures and specific embodiments:
the specific embodiment is as follows:
in the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
As shown in fig. 1 to fig. 3, a structural diagram of an additive powder spraying device for an encapsulated dumbbell provided by an embodiment of the present invention includes a powder spraying chamber 4, a powder gas mixer 1 is fixed on one side of the powder spraying chamber 4, a suspension conveyor 2 is arranged in the powder spraying chamber in a penetrating manner at the top, and a powder atomizing system is further arranged in the powder spraying chamber, including:
the gas circulation device 3 comprises a first air extractor 301 fixed at the top of the powder spraying chamber 4 and a first air blower 302 fixed at the bottom of the powder spraying chamber 4, the first air blower 302 supplies air into the powder spraying chamber 4 from the bottom, the first air extractor 301 extracts air from the top of the powder spraying chamber 4, a circulating gas is formed in the powder spraying chamber, and the powder-air mixture sprayed by the powder atomizer 5 is in a floating state in a full state in the powder spraying chamber 4.
The air pressure controller comprises an air suction device, namely a second air suction device 405, the second air suction device 405 is fixed on a fixed support 404 of the overhead conveyer 1 in the powder spraying chamber 4, and a pressure sensor 406 is also arranged on the overhead conveyer support 4;
a temperature controller comprising a heating device, namely an infrared heating plate 403, wherein the infrared heating plate 403 is fixed on a suspension conveyor bracket 404 in the powder spraying chamber 4, and a temperature sensor 407 is also arranged on the suspension conveyor bracket 404;
the air pressure controller and the temperature controller form a high-temperature low-pressure area on the suspension path of the overhead conveyor 2, and liquefied particles formed by the powder-gas mixture in the high-temperature low-pressure area are adsorbed on the high-temperature workpieces conveyed by the overhead conveyor.
When in specific use:
the powder gas mixer 1 supplies a powder gas mixture to the powder atomizer 5 through the first powder gas mixture interface 408 and the second powder gas mixture interface 410, compressed air is introduced into a compressed air interface of the powder atomizer 5, the first powder gas mixture interface 408 and the second powder gas mixture interface 410 enter the powder atomizer 5 to be blown out and atomized together, and then enter the powder spraying chamber 4, at this time, the powder gas mixture fills the powder spraying chamber 4, the gas circulating device 3 is started, the first air blowing device 302 supplies air into the powder spraying chamber 4 from the bottom, the first air extractor 301 extracts air from the top of the powder spraying chamber 4 to form circulating gas in the powder spraying chamber, the powder gas mixture sprayed by the powder atomizer 5 forms a full floating state in the powder spraying chamber 4, the preheated workpiece is hung on the hook 401 and enters the powder spraying chamber 4 under the conveying of the hanging conveyor 2, at this time, the second air extractor 405 starts extracting air, the infrared ray 403 starts to perform infrared heating on the periphery of the workpiece, plastic particles in the powder gas mixture are heated and melted into small droplets, and the plastic particles are adhered to the surface of the workpiece under the physical adsorption effect, and the plastic powder plastic dipping heating plate is completed.
The atomized powder-gas mixture is attached to a high-temperature workpiece through physical adsorption to form an even plastic coating layer, so that the phenomena of large consumption and waste of plastic dipping liquid in the original plastic dipping process are changed, the plastic dipping process is energy-saving and environment-friendly, the problem that the plastic dipping thickness cannot be controlled is solved, and the purpose of adding a plastic layer on the surface of a metal dumbbell is achieved.
The second embodiment is as follows:
as shown in fig. 5, as a preferred embodiment of the present invention, a plurality of air exhaust pipes are fixedly arranged on the air exhaust device, and a second air exhaust device 405 is arranged on two sides of the overhead conveyer in a flaring manner, and the pipe openings of the air exhaust pipes are inclined downwards. The plurality of drawing points can be formed above the preheated workpiece, so that air flow in a low-pressure area is performed towards the square of a plurality of points, the powder-air mixture in the powder spraying chamber flows to the preheated workpiece better, the adsorption of plastic powder is facilitated, the heating device is provided with the air supply pipe, namely the second air blowing device 402 can form small circulation around the preheated workpiece, the liquefied powder-air mixture is promoted to flow uniformly around the preheated workpiece, and the thickness and uniformity of plastic dipping of the workpiece are controlled favorably.
The third concrete embodiment:
on the basis of the first or second embodiment, the powder atomizer 5 is provided with an atomizing nozzle, and when the powder-gas mixture passes through the atomizing nozzle, the powder-gas mixture rubs against the atomizing nozzle, so that the powder in the powder-gas mixture is charged with static electricity. According to the principle of friction electricity generation, when passing through the atomizing nozzle at a high speed, the plastic powder generates high-speed friction with the nozzle, the atomizing nozzle is provided with narrow atomizing holes, the friction between the atomizing nozzle and the plastic powder is further enhanced, the atomized powder has static electricity, the effect of electrostatic coating is realized, and the plastic powder is more favorably adsorbed on a preheated workpiece.
The fourth concrete embodiment:
on the basis of the first embodiment or the second embodiment, the heating device is provided with an infrared radiation ceramic heating plate, and the powder-gas mixture on the suspension path of the suspension conveyor is heated through the infrared radiation ceramic heating plate. Wherein the heating temperature of the infrared radiation ceramic is set to 600-700 ℃, the melting temperature of the plastic powder is controlled to 200-300 ℃, the low heating effect is controlled by the high heating temperature, a more stable heating environment is realized, and the full liquefaction of the plastic powder is ensured.
The foregoing has outlined broadly some of the aspects and features of the various embodiments, which should be construed to be merely illustrative of various potential applications. Other beneficial results can be obtained by applying the disclosed information in a different manner or by combining various aspects of the disclosed embodiments. Other aspects and a more complete understanding may be obtained by reference to the detailed description of the exemplary embodiments taken in conjunction with the accompanying drawings, based on the scope defined by the claims.
In addition, the invention also discloses the following technical scheme:
the first scheme is as follows:
the heating device uses infrared rays with a wavelength of 3-5 microns to heat the powder-air mixture on the suspension path of the suspension conveyor.
The above examples illustrate the present invention in detail. It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions, deletions, and substitutions which may be made by those skilled in the art within the spirit of the present invention are also within the scope of the present invention.
Claims (4)
1. The utility model provides an increase material powder of rubber coating dumbbell spouts device, includes the powder spray booth, and what run through in the powder spray booth is equipped with the suspension conveyor, its characterized in that, the suspension conveyor goes up to hang has the surface to form intensive diameter to be less than 0.5 millimeter's small pothole's work piece, the powder spray booth still is equipped with powder atomizing system, includes:
the powder atomizer is fixed on the side wall of the powder spraying chamber and sprays a powder-gas mixture of powder and air into the powder spraying chamber after atomizing;
the gas circulation device comprises a first air extractor fixed at the top of the powder spraying chamber and a first air blower fixed at the bottom of the powder spraying chamber, wherein the first air blower supplies air into the powder spraying chamber from the bottom, the first air extractor extracts air from the top of the powder spraying chamber, circulating gas is formed in the powder spraying chamber, and a powder-air mixture sprayed by the powder atomizer is filled in the powder spraying chamber and floats;
the air pressure controller comprises a second air exhaust device, the second air exhaust device is fixed on a fixed support of the suspension type conveyor in the powder spray chamber, a plurality of air exhaust pipes are fixedly arranged on the second air exhaust device, the air exhaust pipes are arranged on two sides of the suspension type conveyor in a horn mouth shape, pipe orifices of the air exhaust pipes are inclined downwards, and a pressure sensor is further arranged on the fixed support of the suspension type conveyor;
the temperature controller comprises a heating device and a temperature sensor, wherein the heating device is fixed on a fixed support of the suspension type conveyor in the powder spraying chamber, an air supply pipe is arranged on the heating device, and the fixed support of the suspension type conveyor is also provided with the temperature sensor;
the air pressure controller and the temperature controller form a high-temperature low-pressure area on a suspension path of the suspension conveyor, so that the powder-gas mixture is promoted to form liquefied particles in the high-temperature low-pressure area and the liquefied particles are adsorbed on a high-temperature workpiece conveyed by the suspension conveyor, and the surface of the workpiece is provided with dense micro pits with the diameter less than 0.5 mm, so that the contact area of the workpiece and the powder-gas compound is increased, and the adsorption force is increased.
2. The additive powder spraying device of the encapsulated dumbbell of claim 1, wherein the powder atomizer is provided with an atomizing nozzle, and the powder gas mixture passes through the atomizing nozzle and rubs against the atomizing nozzle to make the powder in the powder gas mixture electrostatically charged.
3. The additive powder spraying device of an encapsulated dumbbell of claim 2, wherein the heating device uses infrared light of a wavelength of 3-5 microns to heat the powder-air mixture on the hanging path of the ceiling-mounted conveyor.
4. The additive powder spraying device of the encapsulated dumbbell of claim 3, wherein the heating device is provided with an infrared radiation ceramic heating plate, and the powder-air mixture on the hanging path of the ceiling-mounted conveyor is heated by the infrared radiation ceramic heating plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111104080.1A CN114472002B (en) | 2021-09-22 | 2021-09-22 | Additive powder spraying device for rubber-coated dumbbell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111104080.1A CN114472002B (en) | 2021-09-22 | 2021-09-22 | Additive powder spraying device for rubber-coated dumbbell |
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| CN114472002A CN114472002A (en) | 2022-05-13 |
| CN114472002B true CN114472002B (en) | 2023-04-18 |
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| WO1999030838A1 (en) * | 1997-12-17 | 1999-06-24 | International Coatings Limited | Powder coating process |
| DE19959515A1 (en) * | 1999-12-09 | 2001-06-13 | Dacs Dvorak Advanced Coating S | Process for plastic coating by means of a spraying process, a device therefor and the use of the layer |
| RU2622125C2 (en) * | 2013-12-10 | 2017-06-13 | Таикиса Лтд. | Device for collection of aerosol of coating |
| CN110270462B (en) * | 2019-08-01 | 2024-03-22 | 湖南星沙机床设备有限公司 | Coating system for manufacturing crane auxiliary arm by section steel |
| CN111889340A (en) * | 2020-08-21 | 2020-11-06 | 湖南人文科技学院 | Centrifugal pump body machining process and paint spraying device thereof |
| CN112191418A (en) * | 2020-08-26 | 2021-01-08 | 南京视莱尔汽车电子有限公司 | Vehicle body spraying robot for automobile manufacturing and spraying method thereof |
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