Production method of hand sanitizer bottle and plastic lotion bottle
The production of plastic products generally includes the ingredients, molding, machining, joining, modification and assembly of plastics. The last four processes are carried out after the plastic has been molded into a product or semi-product, which is also called secondary plastic processing.
A key link in the processing of molded plastics in the production of hand sanitizer bottles. Various forms of plastics (powders, pellets, solutions or dispersions) are made into products or blanks of the desired shape. There are as many as thirty kinds of molding methods. Its choice is mainly determined by the type of plastic (thermoplastic or thermosetting), the initial form, and the shape and size of the product. The commonly used methods for plastic processing of thermoplastics include extrusion, injection molding, calendering, blow molding and thermoforming. Plastic processing of thermoset plastics generally uses compression molding, transfer molding, and injection molding. Laminating, molding, and thermoforming are forming plastics on a flat surface. The above-mentioned plastic processing methods can all be used for rubber processing. In addition, there are castings using liquid monomers or polymers as raw materials. Among these methods, extrusion and injection molding are the most used, and they are also the most basic molding methods.
The mechanical processing of the production of plastic products uses plastic processing methods such as metal and wood to produce plastic products with precise dimensions or small quantities. It can also be used as an auxiliary process for molding, such as sawing of extruded profiles. Since the performance of plastic is different from that of metal and wood, plastic has poor thermal conductivity, low thermal expansion coefficient and low elastic modulus. When the clamp or tool is pressed too much, it is easy to cause deformation, and it is easy to melt when heated during cutting, and it is easy to adhere to the tool. on. Therefore, when plastics are machined, the tools used and the corresponding cutting speeds must be adapted to the characteristics of the plastics. Commonly used mechanical processing methods include sawing, shearing, punching, turning, planing, drilling, grinding, polishing, thread processing and so on. In addition, plastics can also be cut, punched and welded by laser.
Joining plastic processing in the production of plastic products The methods of joining plastic parts are welding and bonding. The welding method is hot air welding using welding rods, hot melt welding using hot poles, and high-frequency welding, friction welding, induction welding, ultrasonic welding, etc. The bonding method can be divided into flux, resin solution and hot melt adhesive bonding according to the adhesive used.
The purpose of surface modification in the production of plastic products is to beautify the surface of plastic products, usually including: mechanical modification, that is, using files, grinding, polishing and other processes to remove burrs, burrs, and size correction on the parts; coating, including coating with paint Use solvents to brighten the surface of the parts, and use patterned films to cover the surface of the products, etc.; coloring, including color painting, printing and hot stamping; metal plating, including vacuum coating, electroplating, and chemical silver plating. Plastic processing hot stamping is to transfer the colored aluminum foil layer (or other patterned film layer) on the hot stamping film to the part under heating and pressure. Many household appliances, construction products, daily necessities, etc. use this method to obtain patterns such as metallic luster or wood grain.
The assembly of plastic products uses bonding, welding and mechanical connection methods to assemble the finished plastic parts into a complete product. For example: plastic profiles are assembled into plastic window frames and plastic doors after sawing, welding, drilling and other steps.
Hand sanitizer bottle, The production method of plastic lotion bottle is almost as mentioned above