A paint spraying apparatus for fire door manufacturing

Abstract

The utility model discloses a kind of paint spraying equipment for fireproof door manufacturing, including paint spraying box;Conveyer belt, it is installed in the inside of paint spraying box through and through;By integrating paint spraying cavity, infrared drying cavity and auxiliary drying cavity in paint spraying box, and conveyer belt is through it, the integrated continuous production process from paint spraying to drying to auxiliary drying of fireproof door panel is realized, fireproof door panel is sequentially passed each function chamber under the driving of conveyer belt, without transfer and waiting between different equipment, production cycle is greatly shortened;Infrared drying mechanism and hot air auxiliary mechanism work cooperatively, infrared drying mechanism can quickly promote the surface temperature of fireproof door panel, realize preliminary rapid drying;Hot air auxiliary mechanism further accelerates the evaporation of moisture inside paint film, ensure that fireproof door panel is quickly, completely dry, this efficient drying and drying combination mode reduces the residence time of fireproof door panel in equipment, significantly improves overall production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fire door manufacturing technology, specifically to a painting equipment for fire door manufacturing. Background Technology

[0002] In the field of building safety, fire doors, as key fire-resistant partition components, play a vital role in preventing the spread of fire, ensuring the evacuation of personnel and the safety of property. The stability and reliability of their performance are directly related to the protective effect during a fire. In the manufacturing process of fire doors, the painting process is an indispensable and important step. Existing fire door painting equipment only uses one drying method, such as hot air drying or infrared drying. Although hot air drying can achieve large-area heating, the heating speed is relatively slow and it is easy to cause uneven heat distribution. Areas near the heat source dry too quickly, while areas far from the heat source are not dried enough, resulting in incomplete drying and affecting the quality and adhesion of the paint film. Although infrared drying has a fast heating speed, for fire doors with three-dimensional structures or complex shapes, the linear propagation characteristics of infrared rays make it difficult to effectively dry the shaded areas, which also leads to uneven drying.

[0003] For example, a painting equipment for fire door manufacturing (Announcement No.: CN220738183U) uses an air supply fan to deliver hot air from the drying chamber to the drying hood through an air supply pipe, which bakes the fire door, speeds up the drying efficiency and improves the quality of the paint, making it more practical.

[0004] Based on the search of the aforementioned patents and the findings of existing equipment, it is discovered that the aforementioned equipment, when applied, only employs one drying method. By activating the air supply fan in the drying mechanism, hot air from the drying chamber is transported to the drying hood through the air supply pipe to bake the fire door. The area near the heat source of the drying hood dries too quickly, while the area far from the heat source dries insufficiently. This uneven drying phenomenon affects the quality of the paint film on the surface of the fire door, reducing the adhesion and durability of the paint film. Therefore, we need to propose a painting equipment for fire door manufacturing. Utility Model Content

[0005] The purpose of this invention is to provide a painting equipment for fireproof door manufacturing. Through the cooperation of an infrared drying mechanism and a hot air auxiliary mechanism, the infrared drying mechanism can quickly increase the surface temperature of the fireproof door panel to achieve initial rapid drying; the hot air auxiliary mechanism further accelerates the evaporation of moisture inside the paint film to ensure that the fireproof door panel is dried quickly and thoroughly, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A painting equipment for manufacturing fire doors, including a paint spraying box;

[0008] The conveyor belt runs through the inside of the paint spraying box, and both sides of the paint spraying box have inlets and outlets for the conveyor belt to pass through.

[0009] The paint spraying box is located above the conveyor belt and is divided by partitions to form a paint spraying chamber, an infrared drying chamber, and an auxiliary drying chamber. The paint spraying chamber is equipped with a paint spraying mechanism for spraying fireproof door panels conveyed on the surface of the conveyor belt. The infrared drying chamber is equipped with an infrared drying mechanism, and the auxiliary drying chamber is equipped with a hot air auxiliary mechanism.

[0010] Preferably, the infrared drying mechanism includes an electro-hydraulic rod, which is fixedly installed on the top of the paint spraying box. One end of the telescopic end of the electro-hydraulic rod passes through the paint spraying box and extends into the infrared drying chamber, and the end is fixedly connected to a mounting plate. A mounting frame is fixedly installed at the bottom of the mounting plate, and several sets of infrared heating tubes are fixedly installed at equal intervals inside the mounting frame.

[0011] Preferably, the paint spray box is slidably connected to limit rods on both sides of the electro-hydraulic rod, and the bottom of the limit rods is fixedly installed to the top of the mounting plate.

[0012] Preferably, the hot air auxiliary mechanism includes a fan, which is fixedly installed on the top of the paint spraying box. The air inlet of the fan passes through the paint spraying box through a pipe and extends into the auxiliary drying chamber, and the end of the fan is fixedly connected to an air inlet hood. The air inlet hood is fixedly embedded in the partition between the auxiliary drying chamber and the infrared drying chamber. The air outlet of the fan passes through the paint spraying box through a pipe and extends into the auxiliary drying chamber, and the end of the fan is fixedly connected to an air outlet hood. The bottom of the air outlet hood is fixedly connected to an air distribution shell.

[0013] Preferably, the bottom of the air distribution shell is equipped with a mesh cover for uniform airflow, and two sets of connecting frames are symmetrically fixedly installed on the top of both sides of the air distribution shell. The top of the connecting frames is fixedly installed to the inner top of the auxiliary drying chamber by bolts.

[0014] Preferably, the painting mechanism includes a guide cylinder, which is fixedly installed at the top of the painting chamber. A painting frame is fixedly installed at the bottom of the telescopic end of the guide cylinder, and several paint spray heads are installed at equal intervals at the bottom of the painting frame.

[0015] Preferably, a filter device for filtering the discharged gas is fixedly embedded above one side wall of the auxiliary drying chamber.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention integrates the painting chamber, infrared drying chamber, and auxiliary drying chamber into a single painting box, with a conveyor belt running through it. This achieves a continuous, integrated production process for fireproof door panels, from painting to drying and then to auxiliary drying. Driven by the conveyor belt, the fireproof door panels pass sequentially through each functional chamber, eliminating the need for transfer and waiting between different equipment, significantly shortening the production cycle. The infrared drying mechanism works in conjunction with the hot air auxiliary mechanism. The infrared drying mechanism rapidly increases the surface temperature of the fireproof door panels, achieving initial rapid drying. The hot air auxiliary mechanism further accelerates the evaporation of moisture inside the paint film, ensuring rapid and thorough drying of the fireproof door panels. This efficient combination of drying and heat treatment reduces the dwell time of the fireproof door panels within the equipment, significantly improving overall production efficiency. Attached Figure Description

[0018] Figure 1 This is a side view of the three-dimensional structure of the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the paint spray box of this utility model;

[0020] Figure 3 This is a schematic diagram of the infrared drying mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the hot air auxiliary mechanism of this utility model.

[0022] In the diagram: 1. Spray booth; 2. Conveyor belt; 3. Inlet / outlet; 4. Spraying chamber; 5. Infrared drying chamber; 6. Auxiliary drying chamber; 7. Spraying mechanism; 71. Guide cylinder; 72. Spraying frame; 73. Spray nozzle; 8. Infrared drying mechanism; 81. Electro-hydraulic rod; 82. Mounting plate; 83. Mounting frame; 84. Infrared heating tube; 85. Limiting rod; 9. Hot air auxiliary mechanism; 91. Fan; 92. Air inlet hood; 93. Air outlet hood; 94. Air distribution shell; 95. Connecting frame; 10. Filter device. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] A painting equipment for manufacturing fire doors includes a paint spraying box 1;

[0026] The conveyor belt 2 is installed inside the paint spray box 1, and the paint spray box 1 has inlet and outlet 3 on both sides for the conveyor belt 2 to pass through.

[0027] The paint spraying box 1 is located above the conveyor belt 2 and is divided by a partition to form a paint spraying chamber 4, an infrared drying chamber 5, and an auxiliary drying chamber 6. The paint spraying chamber 4 is equipped with a paint spraying mechanism 7 for spraying the fireproof door panels conveyed on the surface of the conveyor belt 2. The infrared drying chamber 5 is equipped with an infrared drying mechanism 8. The auxiliary drying chamber 6 is equipped with a hot air auxiliary mechanism 9.

[0028] The paint spraying box 1 is a closed box structure made of high temperature resistant and corrosion resistant materials. Its interior forms an independent working space, which can effectively prevent paint mist from overflowing during the painting process. The conveyor belt 2 is made of wear-resistant rubber material with anti-slip texture on the surface. Its running speed can be adjusted by a variable frequency motor. Flexible sealing curtains are installed at the inlet and outlet 3, which can automatically open and close with the fireproof door. The partition is made of heat-insulating and flame-retardant material, and a passage is reserved between adjacent chambers for the fireproof door to pass through.

[0029] In an optional embodiment: the infrared drying mechanism 8 includes an electric hydraulic rod 81, which is fixedly installed on the top of the paint spray box 1. One end of the telescopic end of the electric hydraulic rod 81 passes through the paint spray box 1 and extends into the infrared drying chamber 5, and the end is fixedly connected to a mounting plate 82. A mounting frame 83 is fixedly installed at the bottom of the mounting plate 82, and several sets of infrared heating tubes 84 are fixedly installed at equal intervals inside the mounting frame 83.

[0030] It should be noted that the adjustable stroke of the electric hydraulic rod 81 is 0-30cm, and the height of the mounting plate 82 can be precisely controlled through the control system; the infrared heating tube 84 is made of carbon fiber, which has high heating efficiency and uniform heating, and the power can be independently adjusted (0-2000W). The electric hydraulic rod 81 can drive the mounting frame 83 and its internal infrared heating tube 84 to adjust the height. The height-adjustable design is suitable for fireproof door panels of different thicknesses to ensure optimal heating distance; the carbon fiber infrared tube heats up quickly, consumes little energy, and has good heating uniformity, avoiding cracking and bubbling of the paint surface due to local overheating.

[0031] In an optional embodiment: the paint spray box 1 is slidably inserted with limit rods 85 on both sides of the electro-hydraulic rod 81, and the bottom of the limit rods 85 is fixedly installed with the top of the mounting plate 82.

[0032] It should be noted that the limit rod 85 is a solid steel rod with chrome plating, and a wear-resistant guide sleeve is installed at the insertion point with the paint spray box 1; the length of the limit rod 85 matches the maximum stroke of the hydraulic rod, and the limit rod 85 effectively prevents the mounting plate 82 from shifting or shaking when it is raised or lowered, ensuring the parallelism between the infrared heating tube 84 and the door panel; the chrome plating material and the guide sleeve reduce wear, extend service life, and ensure long-term operational stability.

[0033] In an optional embodiment: the hot air auxiliary mechanism 9 includes a fan 91, which is fixedly installed on the top of the paint spraying box 1. The air inlet end of the fan 91 passes through the paint spraying box 1 through a pipe and extends into the auxiliary drying chamber 6, and the end is fixedly connected to an air inlet hood 92. The air inlet hood 92 is fixedly embedded in the partition between the auxiliary drying chamber 6 and the infrared drying chamber 5. The air outlet end of the fan 91 passes through the paint spraying box 1 through a pipe and extends into the auxiliary drying chamber 6, and the end is fixedly connected to an air outlet hood 93. The bottom of the air outlet hood 93 is fixedly connected to an air distribution shell 94.

[0034] It should be noted that the fan 91 is a high-temperature resistant centrifugal fan with adjustable air volume (500-1500 m³ / h). 3 / h); Both the air inlet hood 92 and the air outlet hood 93 are trumpet-shaped structures. The air inlet hood 92 faces the residual heat area of ​​the infrared drying chamber 5, and the air outlet hood 93 faces the air inlet of the air distribution shell 94. The air inlet hood 92 is driven by the fan 91 to recover the residual heat of the infrared drying chamber 5 for secondary use, thereby reducing energy consumption. The adjustable air volume can adapt to different drying needs and avoid excessive wind speed that could cause paint to run. The air is sent into the air distribution shell 94 through the air outlet hood 93.

[0035] In an optional embodiment: a uniform air distribution mesh is installed at the bottom of the air distribution shell 94, and two sets of connecting frames 95 are symmetrically fixedly installed on the top of both sides of the air distribution shell 94. The top of the connecting frames 95 is fixedly installed to the inner top of the auxiliary drying chamber 6 by bolts.

[0036] It should be noted that the air distribution shell 94 has a honeycomb-shaped guide plate inside, and the mesh cover is made of stainless steel with uniform pore size (3-5mm in diameter); the connecting frame 95 is used to install the air distribution shell 94 with bolts. The honeycomb guide plate and the air distribution mesh cover ensure that hot air is evenly covered above the door panel surface, avoiding uneven drying in some areas; the stainless steel mesh cover is resistant to high temperature, easy to clean, and extends the maintenance cycle.

[0037] In an optional embodiment: the painting mechanism 7 includes a guide cylinder 71, which is fixedly installed on the top of the painting chamber 4. A paint frame 72 is fixedly installed at the bottom of the telescopic end of the guide cylinder 71, and a plurality of paint nozzles 73 are installed at equal intervals at the bottom of the paint frame 72.

[0038] It should be noted that the guide cylinder 71 moves in a straight line up and down, and the spray head 73 is a high-pressure atomizing nozzle that can be independently controlled in terms of switch and paint flow rate (0-50ml / min). The guide cylinder 71 drives the spray frame 72 to descend to a suitable position, and several sets of spray heads 73 spray the surface of the fireproof door panel. The spray frame 72 and the spray head 73 refer to the prior art in CN220738183U. Their principles and working processes are the same as those of the prior art, and will not be described in detail in this application.

[0039] In an optional embodiment, a filter device 10 for filtering the discharged gas is fixedly installed above one side wall of the auxiliary drying chamber 6.

[0040] It should be noted that the filter device 10 uses an activated carbon adsorption layer and a HEPA high-efficiency filter for filtration. An air volume sensor is installed at the air outlet, which automatically alarms and prompts the replacement of filter media when the filtration efficiency decreases.

[0041] Working principle: When using this utility model, the fireproof door panel to be painted is conveyed by the conveyor belt 2 and enters the paint spraying box 1 through the inlet and outlet 3. First, it enters the paint spraying chamber 4. The guide cylinder 71 drives the paint spraying frame 72 to move and descend to a suitable position. The paint spraying head 73 performs a uniform paint spraying operation on the surface of the door panel. After the door panel is painted, it enters the infrared drying chamber 5 with the conveyor belt 2. The electric hydraulic rod 81 adjusts the height of the infrared heating tube 84, and the paint surface is initially and quickly dried by infrared radiation. Then, the door panel enters the auxiliary drying chamber 6. The fan 91 introduces the residual heat of the infrared drying chamber 5 and blows it evenly onto the door panel through the air distribution shell 94 to achieve deep drying of the paint surface. The exhaust gas generated during the drying process is purified by the filter device 10 and then discharged. Finally, the processed door panel is sent out of the paint spraying box 1 by the conveyor belt 2.

[0042] The control method in this application is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, this application is mainly used to protect the structure and shape and their combination, so the control method and circuit connection will not be explained in detail in this application.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A painting equipment for manufacturing fire doors, characterized in that, Including paint spray box (1); The conveyor belt (2) is installed inside the paint spray box (1), and the paint spray box (1) has inlet and outlet (3) on both sides for the conveyor belt (2) to pass through. The paint spraying box (1) is located above the conveyor belt (2) and is divided by a partition to form a paint spraying chamber (4), an infrared drying chamber (5) and an auxiliary drying chamber (6). The paint spraying chamber (4) is equipped with a paint spraying mechanism (7) for spraying fireproof door panels conveyed on the surface of the conveyor belt (2). The infrared drying chamber (5) is equipped with an infrared drying mechanism (8). The auxiliary drying chamber (6) is equipped with a hot air auxiliary mechanism (9).

2. The painting equipment for manufacturing fire doors according to claim 1, characterized in that: The infrared drying mechanism (8) includes an electric hydraulic rod (81), which is fixedly installed on the top of the paint spray box (1). One end of the electric hydraulic rod (81) extends through the paint spray box (1) and into the infrared drying chamber (5), and the end is fixedly connected to a mounting plate (82). A mounting frame (83) is fixedly installed at the bottom of the mounting plate (82). Several sets of infrared heating tubes (84) are fixedly installed at equal intervals inside the mounting frame (83).

3. The painting equipment for manufacturing fire doors according to claim 2, characterized in that: The paint spray box (1) is slidably connected to limit rods (85) on both sides of the electric hydraulic rod (81), and the bottom of the limit rods (85) is fixedly installed to the top of the mounting plate (82).

4. The painting equipment for manufacturing fire doors according to claim 1, characterized in that: The hot air auxiliary mechanism (9) includes a fan (91), which is fixedly installed on the top of the paint spray box (1). The air inlet of the fan (91) passes through the paint spray box (1) through a pipe and extends into the auxiliary drying chamber (6), and the end is fixedly connected to an air inlet hood (92). The air inlet hood (92) is fixedly embedded in the partition between the auxiliary drying chamber (6) and the infrared drying chamber (5). The air outlet of the fan (91) passes through the paint spray box (1) through a pipe and extends into the auxiliary drying chamber (6), and the end is fixedly connected to an air outlet hood (93). The bottom of the air outlet hood (93) is fixedly connected to an air distribution shell (94).

5. The painting equipment for manufacturing fire doors according to claim 4, characterized in that: The bottom of the uniform air distribution shell (94) is equipped with a mesh cover for uniform air output. Two sets of connecting frames (95) are symmetrically fixedly installed on the top of both sides of the uniform air distribution shell (94). The top of the connecting frames (95) is fixedly installed to the inner top of the auxiliary drying chamber (6) by bolts.

6. The painting equipment for manufacturing fire doors according to claim 1, characterized in that: The painting mechanism (7) includes a guide cylinder (71), which is fixedly installed on the top of the painting chamber (4). A paint frame (72) is fixedly installed at the bottom of the telescopic end of the guide cylinder (71), and several paint nozzles (73) are installed at equal intervals at the bottom of the paint frame (72).

7. The painting equipment for manufacturing fire doors according to claim 1, characterized in that: A filter device (10) for filtering the discharged gas is fixedly installed above one side wall of the auxiliary drying chamber (6).

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