A heating device for heating and curing a workpiece surface

Abstract

The present invention discloses a heat supply device for heating and curing the surface of a workpiece, comprising a heating chamber, a closed track mechanism laid on the bottom surface of the heating chamber, a support plate circulated along the track mechanism via a universal ball at the bottom, the support plate carrying the workpiece from the loading and unloading platform sequentially passes through a preheating mechanism and a plurality of hot blowing mechanisms in the heating chamber, and finally returns to the loading and unloading platform, the hot blowing mechanism is connected to the output end of the air furnace mechanism, and the turbofan in the baking drum of the air furnace mechanism can mix and accelerate the air at the input end to the output end; the device can provide heat in steps and forms according to the thermosetting requirements of different coatings, so that the workpiece surface can achieve a better curing effect, the air is mixed, heated and accelerated by the air furnace mechanism, so that the hot blowing mechanism can output higher-energy and uniform hot air, thereby improving the thermosetting efficiency, the track mechanism can circulate the support plate to the loading and unloading platform, so that the device can better adapt to assembly line production.

Description

Technical Field

[0001] The invention relates to the technical field of curing and heating equipment, and in particular to a workpiece surface heating and curing heating device. Background Art

[0002] When spraying products and workpieces with spray equipment, they need to go through a high-temperature curing stage. The high-temperature curing stage is the process of converting the surface coating of the coated object from a liquid or powder state into an amorphous solid film. This process usually requires a heating device to provide a stable and efficient heat source. The heating methods of heating devices can generally be divided into electric drying and convection heating. Among them, electric drying has high energy consumption and is easily affected by the distribution of the heating wire, which is prone to uneven heating. It is not suitable for workpieces with complex surfaces. Convection heating uses hot air as the medium. Its advantages are uniform heating and precise temperature control. It is suitable for drying coated objects with high coating quality and complex shapes. The disadvantage is that the heating rate is slow and it is easy to blow the coating coverage on the surface of the workpiece, affecting the final cured surface. A new type of heating device is needed to solve the above problems. Summary of the Invention

[0003] In order to solve the above problems, the present invention proposes a heat supply device for heating and curing the surface of a workpiece, including a heating chamber, a closed track mechanism is laid on the bottom surface of the heating chamber, and a pallet circulates along the track mechanism through the universal ball at the bottom. The pallet carries the workpiece from the loading and unloading platform and passes through the preheating mechanism and several hot blowing mechanisms in the heating chamber in sequence, and finally returns to the loading and unloading platform. The hot blowing mechanism is connected to the output end of the air furnace mechanism, and the turbofan in the baking drum of the air furnace mechanism can mix and accelerate the air at the input end to the output end.

[0004] Furthermore, the air furnace mechanism includes a furnace body, a baking drum is placed horizontally on the upper part of the furnace chamber of the furnace body, a number of fire guide channels connected to the combustion chamber at the bottom of the furnace chamber are provided in the middle of the furnace chamber, a fan connected to the upper part of the furnace chamber is provided on the top of the furnace body, the outer ring surface of the turbofan is rotatably connected to the groove ring on the inner wall of the baking drum, the gear ring in the middle of the outer ring surface is engaged with the gear of the transmission shaft body, the transmission shaft is built into the transmission chamber at the top of the baking drum, and the output end of the drive motor at the top of the furnace body extends into the transmission chamber and engages with the transmission shaft.

[0005] Furthermore, the air furnace mechanisms can be connected in series and diverted through control valves, and the output ends of the air furnace mechanisms of different series connection levels are connected to the hot blowing mechanisms of corresponding levels.

[0006] Furthermore, the hot blowing mechanism includes a lifting platform, the two ends of which are slidingly connected to the walls on both sides of the channel through electric rails, the top of the lifting platform is connected to the top of the heating chamber through a telescopic chute, the input end of the telescopic chute is connected to the output end of the ventilation furnace mechanism, and the output end of the telescopic chute is connected to the air distribution chamber in the lifting platform, and the output hole of the air distribution chamber is connected to the hot blowing pipe with a control valve.

[0007] Furthermore, a negative pressure chamber is provided in the supporting wall of the heating chamber, and a return air window connected to the negative pressure chamber is provided below the wall of the channel where the hot blowing mechanism is located. The negative pressure chamber is connected to the input end of the air furnace mechanism through a circulating pump, and a filter is provided at the output end of the circulating pump.

[0008] Furthermore, the preheating mechanism includes a slide, the top of the slide is slidably connected to the top surface of the heating room along the top rail set along the track mechanism, the bottom of the slide is connected to the telescopic cylinder body, the output end of the telescopic cylinder is connected to the middle part of the bidirectional push rod, and the push rods on both sides of the bidirectional push rod are connected to the electric heating plate, and the electric heating plates are distributed on both sides of the track mechanism.

[0009] Furthermore, the track mechanism includes a single-track component and a double-track component. The two components are buried in the bottom of the heating chamber. A long groove corresponding to the position of the tracks in the two components is opened on the bottom of the heating chamber. The vertical intersection of the single-track component and the double-track component is transitioned through an adapter plate. A pushing cylinder is provided on the side of the long groove where the adapter plate is located. The single-push cylinder pushes along the direction of the adapter plate and is arranged at the transition from the double track to the single track. The double-push cylinder pushes perpendicular to the direction of the adapter plate and is arranged at the transition from the single track to the double track.

[0010] Furthermore, two cylindrical seats are provided on the central axis along the length direction of the bottom of the pallet. The width between the two cylindrical seats is the width between the two tracks in the double-track assembly. The cylindrical seats slide along the long grooves. Universal balls are placed in the ball grooves on the bottom of the cylindrical seats. The universal balls are in contact with the tracks and the adapter plate. A parts rack is provided on the top surface of the pallet, and the workpiece is placed on the parts rack. When the pallet runs to the bottom of the preheating mechanism and the hot blowing mechanism, the output end of the limit cylinder can press against the side of the pallet to limit its movement.

[0011] Furthermore, the monorail assembly includes several pulleys, the axles of the pulleys are rotatably connected to the mounting plates fixed on both sides at the bottom of the bottom surface of the heating chamber, the axles of two adjacent pulleys are connected by a transmission belt, and the track is wound around the wheel surface of each pulley. The axle of one of the pulleys passes through the mounting plate and engages with the gear at the output end of the conveying motor through a gear.

[0012] Furthermore, the double-track assembly is formed by two single-track assemblies in parallel, and there is a pair of pulleys sharing a long wheel shaft in the tracks on both sides, and the gear on the long wheel shaft is engaged with the gear at the output end of the conveying motor.

[0013] The beneficial effects of the present invention are as follows:

[0014] The present invention can provide heat in steps and forms according to the thermosetting requirements of different coatings, so that the workpiece surface can achieve a better curing effect. The device mixes, heats, and accelerates the air through the air furnace mechanism, so that the hot blowing mechanism can output higher-energy, more uniform hot air, thereby improving the thermosetting efficiency. Among them, the air furnace mechanism can output hot air with different energies in series, thereby matching the hot blowing mechanisms in different positions, so as to meet the refined requirements of the workpiece at different thermosetting stages. The track mechanism can cyclically transport the pallet to the loading and unloading platform, so that the device can better adapt to assembly line production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial cross-sectional view of the surface structure of the present invention from above;

[0016] Figure 2 A partial cross-sectional view of the inner layer structure of the present invention from above;

[0017] Figure 3 It is a partial schematic diagram of the front structure of the present invention;

[0018] Figure 4 It is a partial cross-sectional view of the rear structure of the present invention;

[0019] Figure 5 for Figure 4 A partial enlarged view of

[0020] Figure 6 It is a partial cross-sectional view of the right side structure of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the monorail assembly in the present invention;

[0022] Figure 8 It is a structural schematic diagram of the double-track assembly in the present invention.

[0023] The accompanying drawings are described as follows: 1. Heating chamber; 101. Loading and unloading platform; 102. Negative pressure chamber; 103. Top rail; 104. Long groove; 2. Support plate; 201. Universal ball; 202. Cylindrical seat; 203. Parts rack; 3. Baking drum; 301. Transmission chamber; 4. Turbofan; 5. Furnace body; 501. Combustion chamber; 502. Fire channel; 6. Fan; 7. Transmission shaft; 8. Drive motor; 9. Lifting platform; 901 , air distribution chamber; 10. Electric track; 11. Telescopic slide; 12. Hot blowpipe; 13. Return air window; 14. Circulation pump; 15. Filter; 16. Slide; 17. Telescopic cylinder; 18. Bidirectional push rod; 19. Electric heating plate; 20. Track; 21. Adapter plate; 22. Single push cylinder; 23. Double push cylinder; 24. Limit cylinder; 25. Pulley; 26. Drive belt; 27. Conveying motor; 28. Workpiece. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] like Figures 1 to 8 As shown, a workpiece surface heating and curing device includes a heating chamber 1, a closed track mechanism is laid on the bottom surface of the heating chamber 1, and a pallet 2 circulates along the track mechanism through the bottom universal ball 201. The pallet 2 carries the workpiece 28 from the loading and unloading platform 101 and passes through the preheating mechanism and two hot blowing mechanisms in the heating chamber 1 in sequence, and finally returns to the loading and unloading platform 101. The two sides of the loading and unloading platform 101 are connected to the upstream and downstream production lines respectively through conveyor belts (see Figure 1 ), the turntable robot can clamp the upstream workpiece 28 to be heat-cured onto the support plate 2 at the entrance of the heating chamber 1, and can clamp the workpiece 28 that has been heat-cured at the exit onto the downstream conveyor belt.

[0028] In this embodiment, the preheating mechanism includes a slide 16, the top of the slide 16 is slidably connected to the top rail 103 set along the track mechanism on the top surface of the heating chamber 1, the bottom of the slide 16 is connected to the cylinder body of the telescopic cylinder 17, the output end of the telescopic cylinder 17 is connected to the middle part of the two-way push rod 18, and the push rods on both sides of the two-way push rod 18 are connected to the electric heating plate 19, and the electric heating plate 19 is distributed on both sides of the track mechanism; the hot blowing mechanism includes a lifting platform 9, and the two ends of the lifting platform 9 are slidably connected to the walls on both sides of the channel through the electric track 10, and the top of the lifting platform 9 is connected to the top of the heating chamber 1 through the telescopic chute 11, and the output end of the telescopic chute 11 is connected to the air distribution chamber 901 in the lifting platform 9, and the output hole of the air distribution chamber 901 is connected to the hot blowing pipe 12 with a control valve, and the input end of the telescopic chute 11 is connected to the output end of the ventilation furnace mechanism.

[0029] In this embodiment, the air furnace mechanism includes a furnace body 5, a grilling drum 3 is placed horizontally on the upper part of the furnace chamber of the furnace body 5, and a plurality of fire guide channels 502 connected to the combustion chamber 501 at the bottom of the furnace chamber are provided in the middle of the furnace chamber. A fan 6 connected to the upper part of the furnace chamber is provided on the top of the furnace body 5. The turbofan 4 in the grilling drum 3 can mix and accelerate the air at the input end to the output end. The centers of each turbofan 4 are connected by a shaft. The outer ring surface side of the turbofan 4 is rotatably connected to the groove ring of the inner wall of the grilling drum 3. The gear ring 401 in the middle of the outer ring surface is engaged with the shaft gear of the transmission shaft 7. The transmission shaft 7 is built into the transmission chamber 301 at the top of the grilling drum 3. The output end of the drive motor 8 at the top of the furnace body 5 extends into the transmission chamber 301 and engages with the transmission shaft 7.

[0030] In this embodiment, the air furnace mechanisms can be connected in series and divided by a control valve, and the output ends of the air furnace mechanisms of different series connection levels are connected to the hot blowing mechanisms of the corresponding levels ( Figure 4 The air is divided into two stages. After being heated by the first-stage air furnace mechanism, part of the air enters the first-stage hot blowing mechanism, and part enters the second-stage air furnace mechanism. A negative pressure chamber 102 is provided within the supporting wall of the heating chamber 1. A return air window 13 connected to the negative pressure chamber 102 is provided below the wall surface of the passage where the hot blowing mechanism is located. The negative pressure chamber 102 is connected to the input end of the air furnace mechanism via a circulation pump 14. A filter 15 is provided at the output end of the circulation pump 14. The hot air released by the hot blowing mechanism, after blowing on the surface of the workpiece 28, is then drawn back into the input end of the first-stage air furnace mechanism through the negative pressure chamber 102 for circulation.

[0031] In this embodiment, the track mechanism includes a single-track assembly and a double-track assembly, wherein the single-track assembly includes a plurality of pulleys 25, the axles of the pulleys 25 are rotatably connected to the mounting plates 105 fixed on both sides at the bottom of the bottom surface of the heating chamber 1, the axles of the two adjacent pulleys 25 are connected by a transmission belt 26, and the track 20 is wound around the wheel surface of each pulley 25, and the axle of one pulley 25 passes through the mounting plate 105 and is engaged with the output end gear of the conveying motor 27 through a gear; the double-track assembly is formed by two single-track assemblies in parallel, and there is a pair of pulleys 25 sharing a long axle in the tracks on both sides, and the gear on the long axle body is engaged with the output end gear of the conveying motor 27.

[0032] The two components are buried at the bottom of the heating chamber 1. The bottom surface of the heating chamber 1 is provided with a long groove 104 corresponding to the position of the track 20 in the two components. The vertical intersection of the single-track component and the double-track component is transitioned through an adapter plate 21. A pushing cylinder is provided on the side of the long groove 104 where the adapter plate 21 is located. Among them, the single push cylinder 22 pushes along the direction of the adapter plate 21 and is set at the transition from the double track to the single track. The double push cylinder 23 pushes perpendicularly to the direction of the adapter plate 21 and is set at the transition from the single track to the double track.

[0033] In this embodiment, two cylindrical seats 202 are provided on the central axis along the length direction of the bottom of the pallet 2. The width between the two cylindrical seats 202 is the width between the two crawlers 20 in the double-track assembly. The cylindrical seats 202 slide along the long groove 104. The universal ball 201 is placed in the ball groove on the bottom surface of the cylindrical seat 202. The universal ball 201 is in contact with the crawler 20 and the adapter plate 21. A component rack 203 is provided on the top surface of the pallet 2, and the workpiece 28 is placed on the component rack 203. When the pallet 2 moves to the bottom of the preheating mechanism and the hot blowing mechanism, the output end of the limit cylinder 24 can press against the side of the pallet 2 to limit its movement.

[0034] The working principle of the present invention is as follows:

[0035] like Figure 1 As shown, the turntable manipulator (dashed line part in the figure) clamps the workpiece 28 on the upstream conveyor belt to the pallet 2 at the entrance of the heating chamber 1 (on the left side of the loading and unloading platform 101 in the figure). After loading, the single push cylinder 22 at this location shrinks and pushes the pallet 2 from the adapter plate 21 to the crawler 20 of the first monorail assembly. The pallet 2 moves with the crawler 20 to the bottom of the preheating mechanism. The limit cylinder 24 limits the pallet 2 at this location. The workpiece 28 is preliminarily preheated and cured by the electric heating plate 19 to improve the adhesion of the paint on the surface of the workpiece 28. The relative position of the electric heating plate 19 The position can be adjusted by the slide 16, the telescopic cylinder 17 and the bidirectional push rod 18. After the preheating is completed, the limit cylinder 24 releases the pallet 2, and the pallet 2 moves to the second adapter plate 21. The double push cylinder 23 at this position contracts and pushes the pallet 2 onto the crawler 20 of the first double-track assembly. The pallet 2 moves with the crawler 20 and is limited to the bottom of the first-level hot blowing mechanism. The hot air in the lifting platform 9 of the first-level hot blowing mechanism is released to the surface of the workpiece 28 through the hot blow pipe 12, and then the hot air is sucked into the negative pressure chamber 102 and pumped into the first-level air furnace mechanism through the circulating pump 14. In the barbecue drum 3, biomass fuel (or natural gas) is burned in the combustion chamber 501 to heat the barbecue drum 3. The temperature in the combustion chamber 501 is controlled at about 500°C. The fan 6 is started to make the flame rise along the guide channel 502 to heat the barbecue drum 3 more fully. The rotating turbofan 4 in the barbecue drum 3 mixes and accelerates the air to the output end. Part of the hot air at the output end enters the secondary air furnace mechanism for further heating and finally enters the secondary hot blowing mechanism. Part of the hot air returns to the air distribution chamber 901 of the primary air furnace mechanism to complete the cycle (the hot air is usually heated to 2 00℃, which can be monitored by the built-in temperature sensor, and the heating time and distribution amount can be controlled by the opening and closing of the automatic valve. After the first-level heat curing is completed, the pallet 2 is transferred to the second double-track assembly through the second single-track assembly again, and stays under the secondary hot blowing mechanism for secondary heat curing. After the heat curing process is completed, the pallet 2 returns to the right side of the loading and unloading platform 101 through the third single-track assembly, and the turntable robot transfers the heat-cured workpiece 28 to the downstream conveyor belt. Then the pallet 2 is reset to the left side of the loading and unloading platform 101 through the third double-track assembly to wait for the next cycle.

[0036] The present invention can provide heat in steps and forms according to the thermosetting requirements of different coatings, so that the surface of the workpiece 28 can achieve a better curing effect. The air is mixed, heated and accelerated by the air furnace mechanism, so that the hot blowing mechanism can output higher-energy and uniform hot air, thereby improving the thermosetting efficiency. The track mechanism can cyclically transport the pallet 2 to the loading and unloading platform 101, so that the device can better adapt to assembly line production.

[0037] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A workpiece surface heating and curing heating device, comprising a heating chamber (1), characterized in that: A closed track mechanism is laid on the bottom surface of the heating chamber (1), and the support plate (2) circulates along the track mechanism through the bottom universal ball (201). The support plate (2) carries the workpiece (28) from the loading and unloading platform (101) and passes through the preheating mechanism and several hot blowing mechanisms in the heating chamber (1) in sequence, and finally returns to the loading and unloading platform (101). The hot blowing mechanism is connected to the output end of the air furnace mechanism. The turbofan (4) in the baking drum (3) of the air furnace mechanism can mix and accelerate the air at the input end to the output end. The air furnace mechanisms can be connected in series and diverted through a control valve. The output ends of the air furnace mechanisms with different series connection levels are connected to the hot blowing mechanisms of the corresponding levels.

2. The workpiece surface heating and curing heating device according to claim 1, characterized in that: The air furnace mechanism comprises a furnace body (5), a roasting drum (3) is horizontally placed on the upper part of the furnace of the furnace body (5), a plurality of fire guide channels (502) communicating with the combustion chamber (501) at the bottom of the furnace are provided in the middle of the furnace, a fan (6) communicating with the upper part of the furnace is provided on the top of the furnace body (5), the outer ring side of the turbofan (4) is rotatably connected to the groove ring of the inner wall of the roasting drum (3), the gear ring (401) in the middle of the outer ring surface is meshed with the shaft gear of the transmission shaft (7), the transmission shaft (7) is built into the transmission chamber (301) at the top of the roasting drum (3), and the output end of the driving motor (8) at the top of the furnace body (5) extends into the transmission chamber (301) and meshes with the transmission shaft (7).

3. The workpiece surface heating and curing heating device according to claim 1, characterized in that: The hot blowing mechanism comprises a lifting platform (9), both ends of the lifting platform (9) are slidably connected to the walls of the channel via electric rails (10), the top of the lifting platform (9) is connected to the top of the heating chamber (1) via a telescopic chute (11), the input end of the telescopic chute (11) is connected to the output end of the ventilation furnace mechanism, the output end of the telescopic chute (11) is connected to the air distribution chamber (901) in the lifting platform (9), and the output hole of the air distribution chamber (901) is connected to the hot blowing pipe (12) with a control valve.

4. The workpiece surface heating and curing heating device according to claim 1, characterized in that: A negative pressure chamber (102) is provided in the supporting wall of the heating chamber (1), and a return air window (13) connected to the negative pressure chamber (102) is provided below the wall surface of the passage where the hot blowing mechanism is located. The negative pressure chamber (102) is connected to the input end of the air furnace mechanism via a circulating pump (14), and a filter (15) is provided at the output end of the circulating pump (14).

5. The workpiece surface heating and curing heating device according to claim 1, characterized in that: The preheating mechanism comprises a slide (16), the top of the slide (16) is slidably connected to the top surface of the heating chamber (1) along a top rail (103) provided along a track mechanism, the bottom of the slide (16) is connected to the cylinder body of a telescopic cylinder (17), the output end of the telescopic cylinder (17) is connected to the middle of a bidirectional push rod (18), and the push rods on both sides of the bidirectional push rod (18) are connected to electric heating plates (19), and the electric heating plates (19) are distributed on both sides of the track mechanism.

6. The workpiece surface heating and curing heating device according to claim 1, characterized in that: The track mechanism comprises a single track component and a double track component, the two components are buried in the bottom of the heating chamber (1), the bottom surface of the heating chamber (1) is provided with a long groove (104) corresponding to the position of the crawler (20) in the two components, the vertical intersection of the single track component and the double track component is transitioned through an adapter plate (21), and a push cylinder is provided on the side of the long groove (104) where the adapter plate (21) is located, wherein the single push cylinder (22) pushes in the direction of the adapter plate (21) and is provided at the transition point from the double track to the single track, and the double push cylinder (23) pushes perpendicularly to the direction of the adapter plate (21) and is provided at the transition point from the single track to the double track.

7. The workpiece surface heating and curing heating device according to claim 6, characterized in that: Two cylindrical seats (202) are provided on the center axis along the length direction of the bottom of the support plate (2). The width between the two cylindrical seats (202) is the width between the two crawlers (20) in the double-track assembly. The cylindrical seats (202) slide along the long groove (104). A universal ball (201) is placed in the ball groove on the bottom surface of the cylindrical seat (202). The universal ball (201) contacts the crawler (20) and the adapter plate (21). A component rack (203) is provided on the top surface of the support plate (2). The workpiece (28) is placed on the component rack (203). When the support plate (2) moves to the bottom of the preheating mechanism and the hot blowing mechanism, the output end of the limit cylinder (24) can abut against the side of the support plate (2) to limit its movement.

8. The workpiece surface heating and curing heating device according to claim 6, characterized in that: The monorail assembly includes a plurality of pulleys (25), the axles of the pulleys (25) are rotatably connected to mounting plates (105) fixed on both sides at the bottom of the bottom surface of the heating chamber (1), the axles of two adjacent pulleys (25) are connected by a transmission belt (26), and the crawler belt (20) is wound around the wheel surface of each pulley (25), and the axle of one of the pulleys (25) passes through the mounting plate (105) and is meshed with the output end gear of the conveying motor (27) through a gear.

9. The workpiece surface heating and curing heating device according to claim 8, characterized in that: The double-track assembly is formed by connecting two single-track assemblies in parallel. A pair of pulleys (25) sharing a long wheel shaft are provided in the tracks on both sides. The gear on the long wheel shaft is meshed with the output end gear of the conveying motor (27).

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