Is the polishing process of the thermos cup complicated?
The polishing process of the thermos cup is relatively complicated, involving multiple links and professional techniques. The following are the specific situations:
Polishing process
Preliminary preparation: The operator must have professional theoretical knowledge and practical experience, and can only operate the equipment after passing the training assessment. It is necessary to inspect the incoming materials, correctly fill in the basic information of the stainless steel thermos cup, and determine whether the laser printing PLNP logo is required according to customer requirements. It is also necessary to select the number of polishing equipment according to the number of stainless steel thermos cups, add the solution to the reservoir, find the zero point of the equipment, and adjust the accuracy.
Polishing process: Including weld bead processing, cup body polishing and other processes. Weld bead processing uses a vertical sanding machine with #120 or #150 sanding belts. Cup body polishing can be divided into two types: wire drawing and polishing before painting. When polishing, corresponding polishing tools and materials, such as polishing machines, sandpaper, polishing paste, etc., are required to remove the tiny bumps on the surface of the thermos cup by rotation, friction, etc.
Post-processing: After polishing, the thermos cup must be cleaned immediately to ensure that the cleaning water temperature is not less than 15℃. After cleaning, put the stainless steel thermos cup into the centrifugal dryer to ensure that the water on the inner wall of the stainless steel thermos cup is thrown out. Finally, dry the inner and outer walls of the thermos cup.
Technical requirements
Polishing equipment: There are traditional hand polishing and automatic polishing. Automatic polishing equipment such as Delta's thermos cup polishing solution uses an open PC-Based motion control platform and a touch-screen industrial PC to achieve flexible and efficient grinding path planning.
Polishing consumables: Suitable consumables such as sanding belts, sandpaper, polishing paste, etc. need to be selected according to different polishing processes. For example, #120 or #150 sanding belts are used for weld processing.
Polishing parameters: Appropriate processing voltage, upper limit current, polishing time, pump speed, temperature control parameters, etc. need to be set. For example, when the inner liner of a stainless steel thermos is plasma nano-polished, the polishing liquid needs to be heated to a predetermined temperature (78-95°C), the processing voltage is set at 280~350V, and the upper limit current is set at 1000A.
Quality Control
Surface Roughness: The surface roughness value Ra of the stainless steel thermos can be increased by 1~2 levels after polishing. The roughness depends on the original roughness of the part surface, the allowable removal amount and the remaining processing allowance.
Glossiness: The surface of the thermos after polishing should achieve a mirror effect and have a high glossiness.
Defect Detection: Check whether there are scratches, pits, oxide layers and other defects on the surface of the polished thermos to ensure that the surface quality meets the requirements.
Limitations
Easy to Scratch: Although the surface of the polished thermos is smooth, it may still be scratched by hard objects, affecting its appearance.
Maintenance Requirements: The polished thermos requires more detailed maintenance to maintain its surface smoothness and glossiness, and avoid using rough cleaning tools and irritating detergents.
Higher cost: The polishing process requires professional equipment, consumables and technicians, which increases production costs.