The traditional injection molding production method is as follows

Injection molding? A modeling method for industrial product production. Products usually adopt rubber injection molding and plastic injection molding. Injection molding can be divided into injection molding and die casting. Injection molding machine (injection molding machine or injection molding machine for short) is the main molding equipment to make thermoplastic or thermosetting materials into various shapes of plastic products with plastic molding dies. Injection molding is realized by injection molding machine and mold.

Extrusion is a processing method in which materials are heated and plasticized under the action of extruder barrel and screw, pushed forward by screw, and continuously passed through die to make various cross-sectional products or semi-finished products.

Rotational molding? Also known as rotational molding, rotational molding, rotational casting, rotational molding, etc. The molding method is to add a certain amount of plastic (liquid or powder) into the mold and make it rotate along two vertical rotating shafts after the mold is closed.

At the same time, the mold is heated. Under the action of gravity and heat energy, the plastic raw materials in the mold are gradually and evenly coated, melted and attached to the whole surface of the mold cavity, shaped into the same shape as the mold cavity, and then cooled, shaped and demoulded to obtain the product with the required shape.

Blow molding? Also known as hollow blow molding, it is a rapidly developing plastic processing method. A tubular plastic parison obtained by extrusion or injection molding of thermoplastic resin is placed in a combined mold when it is hot (or heated to a softened state), and compressed air is introduced into the parison immediately after the mold is closed, so that the plastic parison expands and adheres to the inner wall of the mold, and various hollow products are obtained after cooling and demoulding.

Blisters? A plastic processing technology, the main principle of which is to heat and soften a flat plastic hard sheet, and then adsorb it on the surface of a mold by vacuum, and then cool and shape it, which is applied to all walks of life.

Molding? Also known as compression molding or compression molding, it is the operation of putting powdery, granular or fibrous plastic into the mold cavity at the molding temperature, and then closing the mold for pressure molding and curing. Compression molding can be used for thermosetting plastics, thermoplastics and rubber materials.

Calendering? Melted and plasticized thermoplastics pass through the gap between two or more parallel counter-rotating rollers, so that the melt is extruded and stretched by the rollers to become a continuous sheet product with certain specifications and dimensions and meeting the quality requirements, and finally naturally cooled and formed. Calendering process is often used to produce plastic films or sheets.

Foam molding? It is a process of adding a proper amount of foaming agent into foaming materials (PVC, PE, PS, etc.). ) make the plastic produce a microporous structure. Almost all thermosetting and thermoplastic plastics can be made into foam, and foam molding has become an important field of plastic processing.

Flow chart of micro-foaming technology (source: ofweek)

Flow chart of micro-foaming technology

Winding forming? The process is that the continuous fiber (or cloth tape or prepreg yarn) soaked in resin glue is wound on the mandrel according to a certain rule, and then cured and demoulded to obtain the product.

Laminated molding? Refers to the molding method of combining multiple layers of the same or different materials under heating and pressure. Commonly used in plastic processing, but also for rubber processing.

Coating forming? It is a process of coating plastic sol or organic sol on the surface of cloth or paper to make leather-like products, lacquered cloth or plastic wallpaper, or coating powdered plastic on the metal surface. Common plastic-coated products include artificial leather, lacquered cloth, plastic wallpaper and various metal-coated products.

Casting? This is a plastic processing method. Early casting is to inject liquid monomer or prepolymer into the mold under normal pressure, and cure it into the product with the same shape as the mold cavity after polymerization.

In 1960s, nylon monomer casting appeared. With the development of molding technology, the traditional concept of casting has changed, and polymer solutions, dispersions, PVC pastes and melts can also be used for casting.

Drop the plastic? This technology uses the variable-state characteristics of thermoplastic polymer materials, that is, the characteristics of viscous flow under certain conditions and solid recovery at room temperature, and uses appropriate methods and special tools to spray ink, shape it into a designed shape as required in its viscous flow state, and then cure it at room temperature.

Cold pressing forming? This is a kind of compression molding. Different from ordinary compression molding, this material is compression molded at room temperature. The molded product after demoulding can be heated again or cured by chemical action.

Compression molding? Mainly used for producing thermosetting plastic products. Forming, heating and melting, die pressing, heating, cross-linking and curing, and demoulding to obtain the product.

Resin transfer molding? It is a technological method that resin is injected into a closed mold to make the reinforced material soak and cure. This technology does not need prepreg and autoclave, which effectively reduces the equipment cost and molding cost.

This technology has developed rapidly in recent years, and has been widely used in aircraft industry, automobile industry, shipbuilding industry and other fields, and many branches such as RFI, VARTM, SCRIMP and SPRINT have been exhibited to meet the application needs of different fields.

Squeeze? It is a pressure processing method, which uses a punch or punch to squeeze the blank placed in the concave die to make it flow plastically, so as to obtain the parts corresponding to the shape of the die hole or concave-convex die. In the process of extrusion, the blank produces three-dimensional compressive stress, and even the blank with low plasticity can be extruded.

Thermoforming? It is a special plastic processing method to process thermoplastic sheets into various products. A special plastic processing method for processing thermoplastic sheets into various products. The sheet is clamped on the frame and heated to a softened state, and under the action of external force, it is kept close to the surface of the mold to obtain a shape similar to the surface of the mold. Cooling, shaping and trimming to obtain the product.

Hand paste molding? Also known as manual paste molding and contact molding, it refers to the manual operation process on the mold coated with release agent, that is, laying reinforcement materials, brushing resin to the required thickness of plastic products, and then curing and demoulding to obtain plastic products.

Laser Rapid Prototyping (LRP) is a brand-new manufacturing technology integrating advanced technologies such as CAD, CAM, CNC, laser, precision servo drive and new materials. Compared with the traditional manufacturing method, it has the advantages of high reproducibility and interchangeability of the prototype.

The manufacturing process has nothing to do with the geometry of the prototype; Short processing cycle, low cost, general manufacturing cost reduced by 50%, processing cycle shortened by more than 70%; A high degree of technical integration has realized the integration of design and manufacturing.

Fused deposition molding? (FDM, Fused Deposition Modeling), which is a process of extruding filamentary materials such as thermoplastic, wax or metal melt from a heated nozzle and performing melt deposition at a fixed rate according to the predetermined trajectory of each layer of the part.

CNC？ Computer numerical control machine tool is an automatic machine tool with program control system. The control system can use control codes or other symbolic instructions to logically process and decode the program, so as to make the machine tool move and process parts.

3D printing is a rapid prototyping technology. It is a technology based on digital model file, using adhesive materials such as powder metal or plastic, and constructing objects by printing layer by layer. 3D printing is usually realized by a material printer using digital technology.

It is often used in mold manufacturing, industrial design and other fields to make models, and then gradually used in the direct manufacturing of some products. Parts already printed with this technology.

There are many different technologies for 3D printing. The difference between them is that components are created in different layers in the form of usable materials. Commonly used materials for 3D printing include nylon glass fiber, polylactic acid, ABS resin, durable nylon material, gypsum material, aluminum material, titanium alloy, stainless steel, silver plating, gold plating, rubber material and so on.