Paint spraying device for automobile injection molding part

Abstract

The invention belongs to the technical field of automobile injection molding part paint spraying, and particularly relates to an automobile injection molding part paint spraying device which comprises a drying box, a lifting supporting mechanism, an adjustable drying mechanism and a waste heat backflow mechanism. A paint spraying cavity, a drying cavity, a mounting cavity and a recycling cavity are formed in the drying box, a paint spraying assembly is mounted on the upper top wall of the paint spraying cavity, a cover door is hinged to the drying box and corresponds to the paint spraying cavity, and a round hole is formed in the center of the bottom wall of the paint spraying cavity; the lifting supporting mechanism is mounted in the drying box and comprises a first electric cylinder, and the first electric cylinder is mounted in the mounting cavity. According to the paint spraying device for the automobile injection molding part, the automobile injection molding part can be directly dried after paint spraying is completed, other equipment is not needed for drying, the machining efficiency of the automobile injection molding part can be improved, and environment pollution and harm to the body of a worker caused by non-dried paint when the automobile injection molding part is transferred can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile injection molding paint spraying, and in particular relates to an automobile injection molding paint spraying device. Background Art

[0002] The production process of automotive injection molding refers to the process of injecting heated and molten plastic or rubber materials into a designed mold, and obtaining parts of the required shape and specifications after cooling. Automotive injection molding parts are widely used in various parts of automobiles, including sensors, electrical components, pipelines, seals, interior parts, etc., and are indispensable parts in the field of automobile manufacturing and maintenance. With the development of the automobile industry and technological progress, automotive injection molding parts have gradually replaced traditional metal and glass parts, becoming an important part of automobile lightweight and safety performance.

[0003] After the production of automotive injection molded parts is completed, their surfaces need to be painted, sprayed, electroplated, UV treated, etc., so that the automotive injection molded parts have better waterproof and UV resistance effects and avoid aging, deformation and other problems. However, the existing automotive injection molded parts painting device has a single function and does not have a drying function. It needs to be dried with the help of other drying equipment. This not only easily reduces the processing efficiency of automotive injection molded parts, but also when transferring automotive injection molded parts, the undried paint will also produce odor, which will pollute the environment and endanger the health of the workers.‌ Therefore, in view of the above-mentioned technical problems, it is necessary to provide a kind of automobile injection molding paint spraying device.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a paint spraying device for automobile injection molded parts, which can solve the problem that the existing paint spraying devices for automobile injection molded parts have a single function.

[0006] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows: An automobile injection molding part painting device comprises: a drying box, a lifting support mechanism, an adjustable drying mechanism and a waste heat reflux mechanism; The drying box is provided with a paint spraying chamber, a drying chamber, an installation chamber and a recovery chamber. A paint spraying assembly is installed on the top wall of the paint spraying chamber. A cover door is hingedly connected to the drying box. The cover door corresponds to the paint spraying chamber. A circular hole is provided at the center of the bottom wall of the paint spraying chamber. The lifting support mechanism is installed in the drying box, and the lifting support mechanism includes a first electric cylinder, which is installed in the installation cavity, and a supporting circular plate is connected to the free end of the first electric cylinder, and the supporting circular plate is arranged in the circular hole and is flush with the bottom wall of the paint spraying cavity; The adjustable drying mechanism is installed in the drying box, and the adjustable drying mechanism includes an air pump, which is installed in the installation cavity. The air outlet of the air pump is connected to a heating pipe, and a heater is installed on the side wall of the heating pipe. A plurality of metal rods are installed in the heating pipe, and a heating wire is provided on the outside of the metal rod. The heating wire is electrically connected to the heater, and one end of the air outlet of the air pump located in the drying cavity is connected to a lifting and enveloping drying mechanism; The waste heat reflow mechanism is installed on the side wall of the drying box, and is used for circulating and recovering the heat generated by the adjustable drying mechanism.

[0007] In one or more embodiments of the present invention, a first connecting channel and a plurality of first through holes are provided in the bottom wall of the paint spray chamber. The first connecting channel is connected to the paint spray chamber through the first through hole. When the paint spray assembly is painting the automotive injection molded parts, the paint on the bottom wall of the paint spray chamber can be transported into the first connecting hole through the first through hole.

[0008] When the paint on the automobile injection molded part needs to be dried, the gas can enter the paint spraying chamber through the first connecting channel and the first through holes, so that the gas diffuses well in the paint spraying chamber, thereby improving the exhaust efficiency of the paint gas in the paint spraying chamber.

[0009] In one or more embodiments of the present invention, a pair of first connecting holes are provided on the side wall of the circular hole, and the first connecting channel is connected to the first connecting holes. When the paint spraying assembly sprays paint on the automobile injection molded parts, the paint in the first connecting channel continues to flow through the first connecting holes so as to recover the paint.

[0010] When the paint on the automobile injection molded part needs to be dried, the gas can enter the first connecting channel through the first connecting hole, and then enter the paint spraying chamber through the plurality of first through holes.

[0011] In one or more embodiments of the present invention, a second connecting hole is provided in the supporting circular plate, the second connecting hole is connected to the first connecting hole, a pair of lower leakage pipes are connected to the bottom wall of the supporting circular plate, the pair of lower leakage pipes are respectively connected to the pair of second connecting holes, when painting the automobile injection molded parts, the paint collected in the first connecting channel enters the second connecting hole through the first connecting hole, then converges into the connecting pipe through the lower leakage pipe, and finally is collected in the recovery chamber through the collecting pipe, so as to realize the collection of paint and avoid waste of paint.

[0012] In one or more embodiments of the present invention, a connecting pipe is connected between a pair of the lower leakage pipes, a collecting pipe is connected to the connecting pipe, one end of the collecting pipe is arranged in the recovery chamber, the paint in the second connecting hole is gathered in the connecting pipe through the lower leakage pipe, and then collected in the recovery chamber through the collecting pipe, and a check valve is installed on the collecting pipe.

[0013] In one or more embodiments of the present invention, a second connecting channel is provided in the supporting circular plate, the second connecting hole is connected to the second connecting channel, a plurality of second through holes evenly distributed around the circumference are provided on the upper surface of the supporting circular plate, the second through holes are connected to the second connecting channel, and when it is necessary to dry the paint on the surface of the automobile injection molding, the hot gas can first enter the second connecting channel through the second connecting hole, and then be discharged through the plurality of second through holes. Since the second through holes are evenly distributed around the circumference, the gas discharged through the second through holes will form an annular air curtain on the outside of the automobile injection molding, and the paint on the surface of the automobile injection molding can be dried by thermal radiation, thereby avoiding direct blowing of the gas, and effectively preventing the paint on the surface of the automobile injection molding from being blown away by the gas, thereby ensuring the painting effect of the automobile injection molding.

[0014] In one or more embodiments of the present invention, the lifting and enveloping drying mechanism includes a heating barrel, the heating barrel is fixedly installed in the drying chamber, and the supporting circular plate is slidably arranged in the heating barrel. When the automobile injection molding parts need to be painted, the supporting circular plate rises and is flush with the bottom wall of the painting chamber, that is, Figure 1 In the state shown, at this time, the port of the heating barrel is blocked by the supporting circular plate to prevent the paint sprayed by the paint spraying assembly from splashing and causing waste of paint.

[0015] When the paint on the surface of the automobile injection molded parts needs to be dried, the supporting circular plate can be controlled to move downward so that the automobile injection molded parts are placed in the heating barrel. Fig.10 As the automotive injection molding parts are in a relatively small space, when the hot gas enters the heating barrel, the temperature in the heating barrel can be quickly raised to improve the drying efficiency of the paint on the surface of the automotive injection molding parts.

[0016] The side wall of the heating barrel is provided with a pair of air inlet holes and an annular air inlet portion, and the pair of air inlet holes respectively correspond to the pair of second connecting holes, and the annular air inlet portion is arranged on the upper side of the air inlet holes. In the initial stage of drying, the hot gas can be controlled to enter the heating barrel from the air inlet holes, and the hot gas will enter the second connecting channel through the second connecting holes, and then be discharged through a plurality of second through holes, so as to form an annular air curtain on the outside of the automobile injection molding, and use heat radiation to dry the paint on the surface of the automobile injection molding to prevent the paint on the surface of the automobile injection molding from being blown away by the gas, thereby ensuring the painting effect of the automobile injection molding.

[0017] When the paint on the surface of the automobile injection molded parts solidifies, the hot gas is controlled to enter the heating barrel from the annular air inlet. At this time, the hot gas entering the heating barrel can directly blow the surface of the automobile injection molded parts to accelerate the drying rate of the paint on the surface of the automobile injection molded parts.

[0018] The heating barrel is connected with a curtain, which surrounds the annular air inlet. When hot gas enters the heating barrel from the air inlet hole, the curtain will cover the annular air inlet to prevent the gas from entering the heating barrel through the annular air inlet, thereby preventing the paint on the surface of the automobile injection molding parts from being directly blown away, thereby ensuring the painting effect of the automobile injection molding parts.

[0019] In one or more embodiments of the present invention, an annular tube is provided in the drying chamber, and the annular tube is provided on the outside of the heating barrel. An air distribution chamber is provided in the annular tube, and the air distribution chamber is connected with the output end of the vacuum pump. A plurality of circumferentially evenly distributed air outlet holes are provided on a side of the annular tube close to the heating barrel, and the air distribution chamber is connected with the outside through the air outlet holes. The hot gas will enter the air distribution chamber and then be discharged through the plurality of air outlet holes.

[0020] A pair of connecting ears are connected to the side wall of the annular tube, and a pair of second electric cylinders are installed in the drying chamber. The free ends of the second electric cylinders are connected to the connecting ears. Through the cooperation between the connecting ears and the second electric cylinders, the lifting and lowering of the annular tube can be controlled, thereby controlling the hot gas to enter the heating barrel from the air inlet hole or the annular air inlet part.

[0021] In one or more embodiments of the present invention, the waste heat reflux mechanism includes an adsorption box, in which a pair of grids are provided, and filter cotton and activated carbon adsorption layers are respectively provided on the pair of grids. The filter cotton and the activated carbon adsorption layer are both used to adsorb harmful substances in the reflux gas to prevent the harmful substances from re-entering the drying box.

[0022] The adsorption box is connected to a first connecting pipe, the first connecting pipe is connected to an air collecting hood, the side wall of the drying box is provided with a circulation hole, the air collecting hood covers the circulation hole, when the vacuum pump is running, the vacuum pump absorbs external gas through the suction end, when the gas flows in the second connecting pipe, a Venturi effect is generated, and then a negative pressure can be formed in the adsorption box, and the adsorption box then absorbs the gas in the paint spray chamber through the first connecting pipe, the air collecting hood and the circulation hole to realize the recycling and reuse of the gas.

[0023] In one or more embodiments of the present invention, the suction end of the vacuum pump is connected to a filter box and a second connecting pipe, the filter box is used to filter the gas sucked by the vacuum pump, and a Venturi tube is connected between the second connecting pipe and the adsorption box. When the gas flows in the second connecting pipe, a Venturi effect is generated, and the second connecting pipe can form a negative pressure state in the adsorption box through the Venturi tube.

[0024] Compared with the prior art, the automobile injection molding parts painting device of the present invention can directly dry the automobile injection molding parts after painting, without the need for drying with the aid of other equipment. This can not only improve the processing efficiency of automobile injection molding parts, but also avoid environmental pollution caused by undried paint when transferring automobile injection molding parts and harm to the health of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A cross-sectional view of a paint spraying device for automobile injection molded parts according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle; Figure 3 for Figure 1 Schematic diagram of the structure at B in the middle; Figure 4 for Figure 1 Schematic diagram of the structure at C in the middle; Figure 5 A first-angle stereoscopic view of a paint spraying device for automobile injection molded parts according to an embodiment of the present invention; Figure 6 A second-angle stereoscopic view of a paint spraying device for automobile injection molded parts according to an embodiment of the present invention; Figure 7 for Figure 6 Schematic diagram of the structure at D in the middle; Figure 8 A three-dimensional diagram of an adjustable drying mechanism in one embodiment of the present invention; Fig. 9 for Figure 8 Schematic diagram of the structure at E in the middle; Fig.10 It is a cross-sectional view of a first state of an adjustable drying mechanism in one embodiment of the present invention; Fig.11 for Fig.10 Schematic diagram of the structure at F in the middle; Fig.12 for Fig.10 Schematic diagram of the structure at G in the middle; Fig.13 It is a cross-sectional view of the second state of the adjustable drying mechanism in one embodiment of the present invention; Fig.14 for Fig.13 Schematic diagram of the structure at H in the middle.

[0027] Description of main reference numerals: 1-drying box, 101-paint spraying chamber, 1011-first connecting channel, 1012-first through hole, 1013-first connecting hole, 102-paint spraying assembly, 103-cover door, 104-drying chamber, 105-installation chamber, 106-recovery chamber, 2-lifting support mechanism, 201-first electric cylinder, 202-support circular plate, 203-second connecting hole, 204-lower leakage pipe, 205-connecting pipe, 206-collecting pipe, 207-second connecting channel, 208-second through hole, 3-adjustable drying mechanism, 301-vacuum pump, 30 11-filter box, 302-heating tube, 303-heater, 304-metal rod, 305-heating wire, 306-annular tube, 307-gas distribution chamber, 308-air outlet, 309-connecting ear, 310-second electric cylinder, 311-heating barrel, 312-air inlet, 313-annular air inlet part, 314-curtain, 4-waste heat reflux mechanism, 401-adsorption box, 402-filter cotton, 403-activated carbon adsorption layer, 404-first connecting tube, 405-gas collecting hood, 406-second connecting tube, 407-Venturi tube. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] like Figures 1 to 14 As shown, a painting device for automobile injection molded parts in one embodiment of the present invention includes a drying box 1, a lifting support mechanism 2, an adjustable drying mechanism 3 and a waste heat reflux mechanism 4.

[0030] The drying box 1 is provided with a paint spraying chamber 101, a drying chamber 104, an installation chamber 105 and a recovery chamber 106. The automobile injection molded parts are painted in the paint spraying chamber 101 and then moved to the drying chamber 104 to complete drying. The installation chamber 105 is used to install the vacuum pump 301 and the first electric cylinder 201, and the recovery chamber 106 is used to recover the paint.

[0031] In addition, a paint spraying assembly 102 is installed on the top wall of the paint spraying chamber 101, and a cover door 103 is hingedly connected to the drying box 1, and the cover door 103 corresponds to the paint spraying chamber 101. The paint spraying assembly 102 can be used to spray paint automobile injection molded parts.

[0032] Specifically, a circular hole is provided at the center of the bottom wall of the paint spraying chamber 101 for accommodating the supporting circular plate 202. When the supporting circular plate 202 is flush with the bottom wall of the paint spraying chamber 101, the automobile injection molding is placed on the supporting circular plate 202, and the automobile injection molding can be painted using the paint spraying assembly 102.

[0033] Preferably, the paint spraying assembly 102 is prior art, and the present application will not elaborate on it in detail.

[0034] like Figures 1 to 14 As shown, a first connecting channel 1011 and a plurality of first through holes 1012 are provided in the bottom wall of the paint spraying chamber 101, and the first connecting channel 1011 is connected to the paint spraying chamber 101 through the first through holes 1012. When the paint spraying assembly 102 sprays paint on the automobile injection molded part, paint may exist on the bottom wall of the paint spraying chamber 101, and the paint may enter the first connecting hole 1013 through the first through holes 1012.

[0035] When the paint on the automobile injection molded parts needs to be dried, the gas can enter the paint spraying chamber 101 through the first connecting channel 1011 and the first through holes 1012, so that the gas diffuses well in the paint spraying chamber 101 to accelerate the discharge efficiency of the paint gas in the paint spraying chamber 101.

[0036] A pair of first connecting holes 1013 are provided on the side wall of the circular hole, and the first connecting channel 1011 is connected to the first connecting holes 1013. When the paint spraying assembly 102 sprays paint on the automobile injection molded part, the paint in the first connecting channel 1011 continues to flow through the first connecting holes 1013 so as to recycle the paint. When the paint on the automobile injection molded part needs to be dried, the gas can enter the first connecting channel 1011 through the first connecting holes 1013, and then enter the paint spraying chamber 101 through the plurality of first through holes 1012.

[0037] In addition, an observation plate and a drain pipe are provided on the side wall of the drying box 1 , and both the observation plate and the drain pipe correspond to the recovery chamber 106 so as to discharge the paint recovered in the recovery chamber 106 .

[0038] like Figures 1 to 14 As shown, the lifting support mechanism 2 is installed in the drying box 1. The lifting support mechanism 2 is used to support the automobile injection molded parts. At the same time, the automobile injection molded parts can also be moved in the painting chamber 101 and the drying chamber 104 so as to paint and dry the automobile injection molded parts.

[0039] The lifting support mechanism 2 includes a first electric cylinder 201, which is installed in the installation cavity 105. The free end of the first electric cylinder 201 is connected to a supporting circular plate 202, which is arranged in the circular hole and is flush with the bottom wall of the spray painting cavity 101. The supporting circular plate 202 is used to carry the automobile injection molded parts. The first electric cylinder 201 is used to control the movement of the supporting circular plate 202 in the spray painting cavity 101, so that the automobile injection molded parts can be moved in the spray painting cavity 101 and the drying cavity 104, thereby completing the painting and drying of the automobile injection molded parts.

[0040] In addition, a second connecting hole 203 is provided in the support circular plate 202, and the second connecting hole 203 is connected to the first connecting hole 1013. A pair of lower leakage pipes 204 are connected to the bottom wall of the support circular plate 202, and the pair of lower leakage pipes 204 are respectively connected to the pair of second connecting holes 203. A connecting pipe 205 is connected between the pair of lower leakage pipes 204, and a collecting pipe 206 is connected to the connecting pipe 205, and one end of the collecting pipe 206 is arranged in the recovery chamber 106. When spraying paint on the injection molded parts of the automobile, the paint on the bottom wall of the spray painting chamber 101 enters the first connecting channel 1011 through the first through hole 1012, and the paint collected in the first connecting channel 1011 enters the second connecting hole 203 through the first connecting hole 1013, and is gathered into the connecting pipe 205 through the lower leakage pipe 204, and finally collected in the recovery chamber 106 through the collecting pipe 206, so as to realize the collection of paint and avoid the waste of paint.

[0041] Specifically, a check valve is installed on the collecting pipe 206 to prevent the paint in the recovery chamber 106 from flowing back.

[0042] like Figures 1 to 14 As shown, a second connecting channel 207 is provided in the supporting circular plate 202 , and the second connecting hole 203 is connected to the second connecting channel 207 . A plurality of second through holes 208 evenly distributed around the circumference are provided on the upper surface of the supporting circular plate 202 , and the second through holes 208 are connected to the second connecting channel 207 .

[0043] When the automobile injection molded parts need to be painted, the paint on the supporting circular plate 202 will enter the second connecting channel 207 through the second through hole 208, and then converge into the connecting pipe 205 through the second connecting hole 203 and the lower leakage pipe 204, and finally be collected in the recovery chamber 106 through the collecting pipe 206 to realize the collection of paint and avoid waste of paint.

[0044] When the paint on the surface of the automobile injection molded part needs to be dried, the hot gas can first be allowed to enter the second connecting channel 207 through the second connecting hole 203, and then discharged through a plurality of second through holes 208. Since the second through holes 208 are evenly distributed in a circle, the gas discharged through the second through holes 208 will form an annular air curtain on the outside of the automobile injection molded part. The paint on the surface of the automobile injection molded part is dried by thermal radiation, thereby preventing the gas from directly blowing on the surface of the automobile injection molded part, effectively preventing the paint on the surface of the automobile injection molded part from being blown away by the gas, thereby ensuring the painting effect of the automobile injection molded part.

[0045] like Figures 1 to 14 As shown, the adjustable drying mechanism 3 is installed in the drying box 1. Through the setting of the adjustable drying mechanism 3, the automobile injection molding parts can be directly dried after the painting is completed, without the aid of other equipment for drying, which can not only improve the processing efficiency of the automobile injection molding parts, but also avoid environmental pollution caused by undried paint when the automobile injection molding parts are transferred and the harm to the health of the workers.

[0046] The adjustable drying mechanism 3 includes an air pump 301, which is installed in the installation cavity 105. The air outlet of the air pump 301 is connected to a heating tube 302. When the air pump 301 is running, the air pump 301 can absorb external air through the air suction end and transport the air to the heating tube 302.

[0047] In addition, a heater 303 is installed on the side wall of the heating tube 302, and a plurality of metal rods 304 are installed in the heating tube 302. A heating wire 305 is arranged outside the metal rod 304, and the heating wire 305 is electrically connected to the heater 303. When the heater 303 is running, the heater 303 can make the heating wire 305 generate heat, and the heat generated by the heating wire 305 can instantly heat the gas flowing in the heating tube 302 to increase the gas temperature.

[0048] Specifically, an annular tube 306 is provided in the drying chamber 104, and the annular tube 306 is provided outside the heating barrel 311. An air distribution chamber 307 is provided in the annular tube 306, and the air distribution chamber 307 is connected to the output end of the vacuum pump 301. A plurality of circumferentially evenly distributed air outlets 308 are provided on one side of the annular tube 306 close to the heating barrel 311, and the air distribution chamber 307 is connected to the outside through the air outlets 308. The hot gas will enter the air distribution chamber 307 and then be discharged through the plurality of air outlets 308.

[0049] In addition, a pair of connecting ears 309 are connected to the side wall of the annular tube 306, and a pair of second electric cylinders 310 are installed in the drying chamber 104, and the free end of the second electric cylinder 310 is connected to the connecting ears 309. Through the cooperation between the connecting ears 309 and the second electric cylinder 310, the lifting and lowering of the annular tube 306 can be controlled, and then the hot gas can be controlled to enter the heating barrel 311 from the air inlet 312 or the annular air inlet 313. When the gas enters the heating barrel 311 from the air inlet 312, the paint on the surface of the automobile injection molded parts can be dried by thermal radiation. When the gas enters the heating barrel 311 from the annular air inlet 313, the gas can blow itself toward the surface of the automobile injection molded parts to speed up the efficiency of drying the paint on the surface of the automobile injection molded parts.

[0050] like Figures 1 to 14 As shown, the air outlet end of the vacuum pump 301 located in the drying chamber 104 is connected to a lifting and enveloping drying mechanism, which can dry the paint on the surface of the automobile injection molded parts 360 degrees to improve the paint drying efficiency.

[0051] The lifting and enveloping drying mechanism includes a heating barrel 311, which is fixedly installed in the drying chamber 104, and a supporting circular plate 202 is slidably arranged in the heating barrel 311. When the automobile injection molded parts need to be painted, the supporting circular plate 202 is controlled to rise and be flush with the bottom wall of the painting chamber 101, that is, Figure 1 In the state shown, at this time, the port of the heating barrel 311 is blocked by the supporting circular plate 202 to prevent the paint sprayed by the paint spraying assembly 102 from splashing and causing waste of paint.

[0052] When the paint on the surface of the automobile injection molded part needs to be dried, the supporting circular plate 202 can be controlled to descend so that the automobile injection molded part is in the heating barrel 311. Fig.10 Since the automobile injection molding is in a relatively small space, when the hot gas enters the heating barrel 311, the temperature in the heating barrel 311 can be quickly increased to improve the drying efficiency of the paint on the surface of the automobile injection molding.

[0053] In addition, a pair of limiting rings are provided in the heating barrel 311, and the pair of limiting rings are respectively provided on the upper and lower sides of the supporting circular plate 202, and are used to limit the moving position of the supporting circular plate 202. When the supporting circular plate 202 contacts the upper limiting ring, the supporting circular plate 202 can be flush with the bottom wall of the spray chamber 101. When the supporting circular plate 202 contacts the lower limiting ring, the second connecting hole 203 corresponds to the air inlet 312, so that the gas enters the second connecting hole 203 through the air inlet 312.

[0054] Specifically, a pair of air inlet holes 312 and an annular air inlet portion 313 are provided on the side wall of the heating barrel 311 . The pair of air inlet holes 312 correspond to the pair of second connecting holes 203 respectively, and the annular air inlet portion 313 is provided on the upper side of the air inlet holes 312 .

[0055] In the initial stage of drying, the hot gas can be controlled to enter the heating barrel 311 from the air inlet 312, and the hot gas will enter the second connecting channel 207 through the second connecting hole 203, and then be discharged through a plurality of second through holes 208, which is used to form an annular air curtain on the outside of the automobile injection molding, and use thermal radiation to dry the paint on the surface of the automobile injection molding, so as to prevent the paint on the surface of the automobile injection molding from being blown away by the gas, thereby ensuring the painting effect of the automobile injection molding.

[0056] When the paint on the surface of the automobile injection molded part solidifies, the hot gas is controlled to enter the heating barrel 311 from the annular air inlet 313. At this time, the hot gas entering the heating barrel 311 can directly blow the surface of the automobile injection molded part to accelerate the drying rate of the paint on the surface of the automobile injection molded part.

[0057] In addition, a curtain 314 is connected to the heating barrel 311, and the curtain 314 surrounds the annular air inlet 313. When the hot gas enters the heating barrel 311 from the air inlet 312, the curtain 314 will cover the annular air inlet 313 to prevent the gas from entering the heating barrel 311 through the annular air inlet 313, thereby preventing the paint on the surface of the automobile injection molded parts from being blown away directly, thereby ensuring the painting effect of the automobile injection molded parts.

[0058] like Figures 1 to 14 As shown, the waste heat reflow mechanism 4 is installed on the side wall of the drying box 1, and the waste heat reflow mechanism 4 is used to circulate and recover the heat generated by the adjustable drying mechanism 3 to avoid the waste of thermal energy resources.

[0059] The waste heat reflux mechanism 4 includes an adsorption box 401, a pair of grids are provided in the adsorption box 401, and a pair of grids are respectively provided with filter cotton 402 and an activated carbon adsorption layer 403. The filter cotton 402 and the activated carbon adsorption layer 403 are both used to adsorb harmful substances in the reflux gas to prevent the harmful substances from re-entering the drying box 1.

[0060] In addition, the adsorption box 401 is connected to a first connecting pipe 404, and the first connecting pipe 404 is connected to an air collecting hood 405. The side wall of the drying box 1 is provided with a circulation hole, and the air collecting hood 405 covers the circulation hole. When the vacuum pump 301 is running, the vacuum pump 301 absorbs external gas through the suction end, and when the gas flows in the second connecting pipe 406, a Venturi effect is generated, which can form a negative pressure in the adsorption box 401. The adsorption box 401 then absorbs the gas in the paint spray chamber 101 through the first connecting pipe 404, the air collecting hood 405 and the circulation hole to achieve the recycling of the gas.

[0061] Specifically, the suction end of the vacuum pump 301 is connected to a filter box 3011 and a second connecting pipe 406. The filter box 3011 is used to filter the gas sucked by the vacuum pump 301. A Venturi tube 407 is connected between the second connecting pipe 406 and the adsorption box 401. When the gas flows in the second connecting pipe 406, a Venturi effect is generated. The second connecting pipe 406 can form a negative pressure state in the adsorption box 401 through the Venturi tube 407.

[0062] In addition, a negative pressure tank can be installed in the installation cavity 105, and the negative pressure tank is connected to an air inlet pipe and an air outlet pipe. The air inlet pipe is connected to the suction end of the vacuum pump 301 through a three-way pipe, and the air outlet pipe is connected to the air outlet end of the vacuum pump 301 through a three-way pipe. A first control valve is installed on both the air inlet pipe and the air outlet pipe, and a second control valve is installed between the filter box 3011 and the second connecting pipe 406.

[0063] When the paint on the surface of the automobile injection molded part is dried, the vacuum pump 301 and the heater 303 are stopped, and the support circular plate 202 is controlled to rise and be flush with the bottom wall of the paint spraying chamber 101. At this time, there is still hot gas in the paint spraying chamber 101. The second control valve is closed, and the first control valve on the air intake pipe is opened. Due to the negative pressure of the negative pressure tank, the hot gas in the paint spraying chamber 101 can be sucked through the second connecting pipe 406, the venturi tube 407, the adsorption box 401, the first connecting pipe 404, the gas collecting cover 405 and the circulation hole, so that the hot gas is temporarily stored in the negative pressure tank.

[0064] When the paint on the surface of the automobile injection molded part needs to be dried again, the first control valve on the air outlet pipe is opened, so that the hot gas temporarily stored in the negative pressure tank enters the heating pipe 302 through the air outlet pipe to preheat the metal rod 304 and the heating wire 305.

[0065] Preferably, a negative pressure suction pipe is installed on the negative pressure tank, and negative pressure can be drawn into the negative pressure tank by connecting the negative pressure suction pipe to an external vacuum pump.

[0066] Furthermore, a control box is installed on the side wall of the drying box 1, and the paint spraying assembly 102, the first electric cylinder 201, the vacuum pump 301, the heater 303 and the second electric cylinder 310 are electrically connected. At the same time, a timing unit is provided in the control box, that is, when the hot gas enters the heating barrel 311 through the air inlet 312 for a certain period of time, the second electric cylinder 310 will automatically extend so that the air outlet 308 can be aligned with the annular air inlet 313, so that the hot gas can be blown to the automobile injection molded part through the annular air inlet 313.

[0067] When in use, the cover door 103 is opened, the automobile injection molded parts to be painted are placed on the supporting circular plate 202, the cover door 103 is closed, and the paint spraying assembly 102 is controlled by the control box to spray paint the automobile injection molded parts on the supporting circular plate 202. During the painting process, the paint on the bottom wall of the paint spraying chamber 101 will enter the first connecting channel 1011 through the first through hole 1012, and then be collected into the recovery chamber 106 through the first connecting hole 1013, the second connecting hole 203, the lower leakage pipe 204, the connecting pipe 205 and the collecting pipe 206. The paint on the supporting circular plate 202 will enter the second connecting channel 207 through the second through hole 208, and then be collected into the recovery chamber 106 through the second connecting hole 203, the lower leakage pipe 204, the connecting pipe 205 and the collecting pipe 206 to avoid waste of paint.

[0068] When the automobile injection molded parts are finished being painted, the painting assembly 102 is stopped, the first electric cylinder 201 is controlled to contract, and the first electric cylinder 201 drives the supporting circular plate 202 to descend, so that the automobile injection molded parts enter the heating barrel 311. The vacuum pump 301 and the heater 303 are operated, and the vacuum pump 301 absorbs external gas, and the absorbed gas flows in the heating tube 302, and can be heated immediately under the action of the heater 303 to increase the temperature of the flowing gas in the heating tube 302. The heated gas enters the gas distribution cavity 307, and is finally discharged through a plurality of gas outlets 308.

[0069] In the initial stage of drying, since the paint on the surface of the automobile injection molding is not solidified, if direct gas blowing is used, it may affect the painting effect on the surface of the automobile injection molding. Therefore, it is necessary to control the correspondence between the air outlet 308 and the air inlet 312, that is, the gas discharged from the air outlet 308 will enter the second connecting channel 207 through the air inlet 312 and the second connecting hole 203, and then be discharged through a plurality of second through holes 208, which is used to form an annular air curtain on the outside of the automobile injection molding, and use heat radiation to dry the paint on the surface of the automobile injection molding, so as to prevent the paint on the surface of the automobile injection molding from being blown away by gas, and ensure the painting effect of the automobile injection molding.

[0070] When the paint on the surface of the automobile injection molded part solidifies, the second electric cylinder 310 is controlled to extend, so that the annular tube 306 can rise and correspond to the annular air inlet 313. At this time, the gas discharged from the air outlet 308 can enter the heating barrel 311 from the annular air inlet 313, and can directly blow the automobile injection molded part on the supporting circular plate 202 to accelerate the drying rate of the paint on the surface of the automobile injection molded part.

[0071] The hot gas in the heating barrel 311 will enter the paint spray chamber 101 through the circular hole. At the same time, part of the gas in the heating barrel 311 will enter the first connecting channel 1011 through the first connecting hole 1013, and then be discharged to the paint spray chamber 101 through the first through hole 1012, so as to speed up the gas flow rate in the paint spray chamber 101 and speed up the discharge efficiency of the paint gas in the paint spray chamber 101.

[0072] In addition, when the vacuum pump 301 absorbs external gas, a Venturi effect will be generated when the gas flows in the second connecting pipe 406, and then a negative pressure can be formed in the adsorption box 401 through the Venturi tube 407. The adsorption box 401 then absorbs the gas in the paint spray chamber 101 through the first connecting pipe 404, the gas collecting hood 405 and the circulation hole, that is, it can absorb the gas with heat in the paint spray chamber 101, and the gas with heat will then be absorbed by the vacuum pump 301. This cycle is repeated to achieve the recycling of gas.

[0073] When the automobile injection molded parts on the support circular plate 202 are dried, the vacuum pump 301 and the heater 303 are stopped, and the first electric cylinder 201 is controlled to rise, so that the support circular plate 202 is flush with the bottom wall of the paint spraying chamber 101 again. At this time, there is still hot gas in the paint spraying chamber 101, close the second control valve, open the first control valve on the air intake pipe, and due to the negative pressure of the negative pressure tank, the hot gas in the paint spraying chamber 101 can be absorbed through the second connecting pipe 406, the venturi tube 407, the adsorption box 401, the first connecting pipe 404, the gas collecting hood 405 and the circulation hole, so that the hot gas is temporarily stored in the negative pressure tank for standby. Open the cover door 103 and take out the automobile injection molded parts that have been painted.

[0074] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0075] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A paint spraying device for automobile injection molded parts, characterized in that: include: A drying box, wherein a paint spraying chamber, a drying chamber, an installation chamber and a recovery chamber are provided in the drying box, a paint spraying assembly is installed on the top wall of the paint spraying chamber, a cover door is hingedly connected to the drying box, the cover door corresponds to the paint spraying chamber, and a circular hole is provided at the center of the bottom wall of the paint spraying chamber; A lifting support mechanism is installed in the drying box, the lifting support mechanism comprises a first electric cylinder, the first electric cylinder is installed in the installation cavity, a supporting circular plate is connected to the free end of the first electric cylinder, the supporting circular plate is arranged in the circular hole and is flush with the bottom wall of the paint spraying cavity; An adjustable drying mechanism is installed in the drying box, the adjustable drying mechanism includes an air pump, the air pump is installed in the installation cavity, the air outlet of the air pump is connected to a heating pipe, a heater is installed on the side wall of the heating pipe, a plurality of metal rods are installed in the heating pipe, a heating wire is provided on the outside of the metal rod, the heating wire is electrically connected to the heater, and the air outlet of the air pump is located in the drying cavity. One end is connected to a lifting and enveloping drying mechanism; A waste heat reflux mechanism is installed on the side wall of the drying box, and is used for recycling the heat generated by the adjustable drying mechanism.

2. The automotive injection molded parts painting device according to claim 1, characterized in that: A first connecting channel and a plurality of first through holes are provided in the bottom wall of the paint spraying chamber, and the first connecting channel is connected with the paint spraying chamber through the first through holes.

3. The automotive injection molded parts painting device according to claim 2, characterized in that: A pair of first communicating holes are provided on the side wall of the circular hole, and the first connecting channel is connected with the first communicating holes.

4. The automotive injection molded parts painting device according to claim 3, characterized in that: A second connecting hole is provided in the supporting circular plate, the second connecting hole is connected to the first connecting hole, a pair of lower leakage pipes are connected to the bottom wall of the supporting circular plate, and the pair of lower leakage pipes are respectively connected to the pair of second connecting holes.

5. The automotive injection molded parts painting device according to claim 4, characterized in that: A connecting pipe is connected between the pair of lower leakage pipes, a collecting pipe is connected to the connecting pipe, one end of the collecting pipe is arranged in the recovery chamber, and a check valve is installed on the collecting pipe.

6. The automotive injection molded parts painting device according to claim 5, characterized in that: A second connecting channel is provided in the supporting circular plate, the second connecting hole is connected to the second connecting channel, and a plurality of second through holes evenly distributed around the circumference are provided on the upper surface of the supporting circular plate, the second through holes are connected to the second connecting channel.

7. The automotive injection molded parts painting device according to claim 6, characterized in that: The lifting and enveloping drying mechanism includes a heating barrel, which is fixedly installed in the drying chamber. The supporting circular plate is slidably arranged in the heating barrel. The side wall of the heating barrel is provided with a pair of air inlet holes and an annular air inlet portion. The pair of air inlet holes respectively correspond to a pair of second connecting holes. The annular air inlet portion is arranged on the upper side of the air inlet hole. A curtain is connected to the heating barrel, and the curtain surrounds the annular air inlet portion.

8. The automotive injection molded parts painting device according to claim 7, characterized in that: An annular tube is provided in the drying chamber, and the annular tube is provided outside the heating barrel. An air distribution chamber is provided in the annular tube, and the air distribution chamber is connected with the output end of the vacuum pump. A side of the annular tube close to the heating barrel is provided with a plurality of circumferentially evenly distributed air outlets, and the air distribution chamber is connected with the outside through the air outlet holes. A pair of connecting ears are connected to the side wall of the annular tube, and a pair of second electric cylinders are installed in the drying chamber, and the free ends of the second electric cylinders are connected to the connecting ears.

9. The automotive injection molded parts painting device according to claim 1, characterized in that: The waste heat reflux mechanism includes an adsorption box, a pair of grids are provided in the adsorption box, filter cotton and activated carbon adsorption layers are respectively provided on the pair of grids, the adsorption box is connected to a first connecting pipe, the first connecting pipe is connected to an air collecting hood, the side wall of the drying box is provided with circulation holes, and the air collecting hood covers the circulation holes.

10. The automotive injection molded parts painting device according to claim 9, characterized in that: The suction end of the vacuum pump is connected to a filter box and a second connecting pipe, and a Venturi tube is connected between the second connecting pipe and the adsorption box.

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