I. Surface Treatment Processes
- Coating Processes
Powder Coating: Compared with traditional liquid coatings, powder coating is a more environmentally friendly and efficient coating method. It can provide a uniform and thick coating, enhancing the wear resistance and corrosion resistance of folding doors. Factories can precisely control parameters such as the particle size of the powder, the voltage and current of the spray gun, etc., to make the coating smoother, and the colors more vivid and long-lasting. For example, during the electrostatic powder coating process, ensuring good grounding of the workpiece enables the powder to be evenly adsorbed on the surface of the folding door, avoiding flaws like an orange peel or granular appearance. To improve the exterior and interior of folding doors, the exterior of folding doors can be modified through powder coating. You can choose any color you like for the exterior of the folding door to make the frame look bright and nice and better match your home style. For instance, if your home style is retro and elegant, you can apply the color of gilt on the door frame to make your home style harmonious and unified.
Electrophoretic Coating: This process is mainly used for metal folding doors. Electrophoretic paint can penetrate into the tiny pores on the metal surface and form a protective film with extremely strong adhesion. Its appearance effect is very uniform and delicate, and it has good weather resistance. When factories conduct electrophoretic coating, they can optimize the formulation of the electrophoretic solution, such as adjusting the resin components and pigment content, to make the color on the surface of the folding door more saturated. Meanwhile, by controlling the electrophoresis time and voltage, the thickness of the paint film can be ensured to be uniform, improving the appearance quality. This process can handle details in gaps well, making the whole look uniform and flawless.
Surface Texture Treatment
Sandblasting Treatment: For folding doors with texture requirements, the sandblasting process is a good choice. Mechanical sandblasting or chemical sandblasting methods can be used. Mechanical sandblasting uses tools such as sandpaper and abrasive belts to grind the surface of the door, which can create sandblasting effects of different coarseness. For example, after the folding door is polished with fine sandpaper, the surface will present a soft luster and a delicate touch, which is suitable for modern minimalist style decoration. Chemical sandblasting uses chemical reagents to corrode the surface to form a uniform sandblasted texture. This method can control the degree and pattern of sandblasting more precisely. For those who pursue the texture of doors and windows, the sandblasting treatment can be used in the process to make the surface of doors and windows more artistic and textured.
Wire Drawing Treatment: It is mainly applied to metal folding doors, such as aluminum alloy ones. By using mechanical or chemical methods to draw linear or curved filamentous textures on the surface of the door, the metallic texture and three-dimensional effect can be enhanced. Factories can use professional wire drawing equipment, adjust the rotation speed and pressure of the wire drawing wheel, and control the depth and spacing of wire drawing to make the textures more regular and beautiful. Meanwhile, after wire drawing, subsequent treatments such as oxidation can be carried out to enhance the stability and corrosion resistance of the textures.
II. Molding Processes
- Improvement of Mold Precision
For components such as the frames of folding doors, if they are formed by injection molding or die-casting, high-precision molds are the key. Factories should regularly maintain and upgrade molds to ensure that the dimensional accuracy of the mold cavities is within a very small tolerance range. For example, when injecting and molding plastic folding door frames, precise molds can make the edges of the frames smooth and the corners distinct, without appearance defects such as flash and burrs. Meanwhile, good mold design can also realize some decorative elements during the molding process. For example, delicate patterns can be designed at the edges and directly formed through injection molding to improve the overall appearance. Under the requirements of customers and details, the produced molds should be more precise, because only precise doors and windows can meet the needs of customers and be properly installed in specific positions. Efforts should also be made on the components of folding doors. Only by working hard on these fine details can good doors and windows be produced and doors and windows with a longer service life be manufactured.
Optimization of Thermoforming
For some materials of folding doors that adopt the thermoforming process, such as PVC, factories need to precisely control the heating temperature, forming pressure and time. Appropriate heating temperature can make the material have good plasticity and be able to closely fit the mold under pressure to form a smooth and wrinkle-free surface. For example, when thermoforming PVC folding door panels, if the temperature is too high, it may cause the material to be overly softened, resulting in an uneven surface or local thinning; if the temperature is too low, effective forming cannot be achieved. Through repeated tests and optimization of process parameters, the appearance of the thermoforming folding doors can be made more refined.
For some materials of folding doors that adopt the thermoforming process, such as PVC, factories need to precisely control the heating temperature, forming pressure and time. Appropriate heating temperature can make the material have good plasticity and be able to closely fit the mold under pressure to form a smooth and wrinkle-free surface. For example, when thermoforming PVC folding door panels, if the temperature is too high, it may cause the material to be overly softened, resulting in an uneven surface or local thinning; if the temperature is too low, effective forming cannot be achieved. Through repeated tests and optimization of process parameters, the appearance of the thermoforming folding doors can be made more refined.
III. Assembly Processes
- Precision of Component Assembly
Folding doors are usually composed of multiple door panels, tracks and hardware accessories. During the assembly process, improving the precision of component assembly is crucial. Factories can use high-precision processing equipment to cut and process door panels to ensure the consistency of the panel sizes. For example, when using CNC cutting equipment to cut door panels, the dimensional error can be controlled within a very small range, making the splicing between door panels closer and seamless. Meanwhile, for the installation of tracks, it is necessary to ensure their horizontality and verticality so that during the opening and closing of folding doors, the overall stability of the doors and the flatness of the appearance can be ensured. Since folding doors are assembled from multiple components and each component is very refined, and components need to fit well with each other to be assembled together. Therefore, the more detailed and subtle parts are, the more meticulous they need to be to produce good products.
Optimization of Hardware Installation
Hardware is a key component of folding doors, and its installation quality directly affects the appearance and usage function. When installing hardware such as hinges and handles, factories should ensure that the installation positions are accurate and the tightening degree of screws is appropriate. For example, if the hinges are not installed properly, it will cause the folding doors to open and close unsmoothly, and when closed, there may be inconsistent widths of the door gaps. By using positioning molds or fixtures to assist in installing hardware and making fine adjustments after installation, the hardware can be perfectly integrated with the folding doors, improving the overall appearance. The hardware accessories need to be optimized. Only by continuous optimization can they fit better during installation. Only when they fit extremely well can the doors and windows have a longer service life.
