19 Plastic Processing Processes

Plastic molding is the process of making products or blanks of required shapes from plastics of various forms (powder, particle, solution and dispersion). The manufacturing process of most cosmetic packaging products is mainly through four key processes: mold forming, surface treatment, printing and assembly. The molding process is an indispensable key part. Today, Xiao Bian will quickly browse 19 plastic molding processes with you.
injection molding 
It is a method of industrial product production modeling. Rubber injection molding and plastic injection molding are usually used for products. Injection molding can also be divided into injection molding molding and die-casting.
Extrusion molding
It is a processing method that materials are heated and plasticized while being pushed forward by the screw through the action between the extruder barrel and the screw, and are continuously made into products or semi products of various sections through the die.
Rotary forming
Also called rotational molding, rotary molding, rotary molding, rotary casting, rotary molding, etc., this molding method is to first add the measured plastic (liquid or powder) into the mold, and after the mold is closed, rotate it along two vertical rotation axes, while heating the mold. Under the action of gravity and heat energy, the plastic raw materials in the mold are gradually uniformly coated, melted and adhered to the entire surface of the mold cavity, forming the same shape as the mold cavity, After cooling, shaping and demoulding, products with the required shape can be obtained
Blow molding
Also known as hollow blow molding, it is a rapidly developing plastic processing method. The tubular plastic parison produced by extrusion or injection molding of thermoplastic resin is placed in the split die while it is hot (or heated to a softened state), and compressed air is introduced into the parison immediately after the die is closed, so that the plastic parison is blown and stuck to the inner wall of the die. After cooling and demoulding, various hollow products are obtained.
Blister molding
A plastic processing technology, the main principle of which is to heat and soften the flat plastic hard sheet, absorb it on the surface of the mold by vacuum, cool it, and shape it, and apply it to all walks of life.
Compression Molding 
Also known as compression molding or compression molding, it refers to the operation of putting powdered, granular or fibrous plastics into the mold cavity at the molding temperature first, and then pressing the closed mold to make it molded and solidified. Molding can also be used for thermosetting plastics, thermoplastics and rubber materials.
Calendering
Melt plasticized thermoplastic is extruded, extended and stretched by more than two parallel and opposite rotating roller gaps to become a continuous sheet product with a certain size and quality requirements, and finally formed by natural cooling.
Foaming molding
It is the process of adding proper foaming agent into foaming materials (PVC, PE, PS, etc.) to make plastics produce microporous structure.
filament winding 
The process is to wind the continuous fiber (or cloth tape, prepreg yarn) dipped in resin glue onto the core mold according to a certain rule, and then obtain the product after curing and demoulding.
Laminate forming
It refers to the forming and processing method of integrating multiple layers of the same or different materials under heating and pressure.
Coating molding
It is a process that uses plastic sol or organic sol to coat the surface of cloth or paper and other substrates to make imitation leather products, lacquered cloth or plastic wallpaper, or to coat powdery plastic with metal surfaces.
Pouring molding
It is a method of plastic processing. In the early stage of casting, liquid monomer or prepolymer was injected into the mold under normal pressure, and then polymerized and solidified into products with the same shape as the mold cavity.
Dripping plastic
The technology is to make use of the characteristics of thermoplastic polymer materials with variable state, that is, it has viscous flow under certain conditions, but it can recover the characteristics of solid state at room temperature, and use appropriate methods and special tools to spray ink, shape it into a designed shape under its viscous flow state as required, and then cure it at room temperature.
Cold molding
It is a kind of compression molding. Different from ordinary compression molding, materials are molded under pressure at room temperature. The demoulded molded products can be heated again or ripened by chemical action.
Compression molding
It is mainly used in the production of thermosetting plastic products. After heating, the molding is melted, the pressing die is pressed, and then the product is heated, cross-linked, solidified, and demoulded.
Resin transfer molding
It is a process method to inject resin into a closed mold to soak reinforcement materials and solidify them.
Extrusion molding
It is a pressure processing method that the punch or punch is used to pressurize the blank placed in the female die to produce plastic flow, so as to obtain the parts corresponding to the shape of the die holes or male and female dies.
Thermoforming
It is a special plastic processing method for processing thermoplastic sheets into various products.
3D printing
It is a kind of rapid prototyping technology. It is a technology based on digital model files, which uses powder metal or plastic and other adhesive materials to build objects by layer printing.