Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting. Injection molding machine (referred to as injection machine or injection molding machine) is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting materials. Injection molding is achieved through injection molding machines and molds.
02 Extrusion
The material passes through the action between the extruder barrel and the screw, while being heated and plasticized, and is pushed forward by the screw, and continuously passes through the head to make various cross-section products or semi-finished products.
03 Rotational molding
Also known as rotational molding, rotational molding, rotational molding, rotational casting, rotational molding, etc., this molding method is to first add a measured amount of plastic (liquid or powder) into the mold, and after the mold is closed, rotate it along two vertical rotation axes, and heat the mold at the same time. Under the action of gravity and heat energy, the plastic raw materials in the mold are gradually and evenly coated, melted and adhered to the entire surface of the mold cavity, forming into the same shape as the mold cavity, and then cooled, shaped, and demolded to obtain the desired shape of the product.https://solidcomould.com/product/armless-chair-with-metal-leg-mould/
04 Blow molding
Also known as hollow blow molding, it is a rapidly developing plastic processing method. The tubular plastic preform obtained by extrusion or injection molding of thermoplastic resin is placed in a split mold while hot (or heated to a softened state). After the mold is closed, compressed air is immediately introduced into the preform to inflate the plastic preform and tightly adhere to the inner wall of the mold. After cooling and demolding, various hollow products are obtained.
05 Vacuum Forming
A plastic processing technology, the main principle is to heat and soften the flat plastic hard sheet, then use vacuum adsorption to the mold surface, and then cool it to form it. It is a technical process that is applied to various industries.
06 Compression Molding
Also known as compression molding or compression molding, it is the operation of first putting powdered, granular or fibrous plastics into the mold cavity at the molding temperature, and then closing the mold and pressurizing it to form and solidify it. Compression molding can be used for thermosetting plastics, thermoplastics and rubber materials.
07 Calendering
The molten plasticized thermoplastic plastic passes through the gap between two or more parallel and counter-rotating rollers, so that the melt is squeezed, stretched and stretched by the rollers to become a continuous sheet product with certain specifications and quality requirements, and finally naturally cooled and formed. The calendering process is often used in the production of plastic films or sheets.
08 Foaming Molding
It is a process of adding appropriate foaming agents to foaming materials (PVC, PE and PS, etc.) to make the plastic produce a microporous structure. Almost all thermosetting and thermoplastic plastics can be made into foam plastics, and foam molding has become an important field in plastic processing.
09 Winding molding
The process is to wind continuous fibers (or cloth tapes, pre-impregnated yarns) soaked in resin glue onto a core mold according to a certain pattern, and then solidify and demold to obtain
10 Lamination molding
It refers to the molding method of combining multiple layers of the same or different materials under heating and pressure. It is commonly used in plastic processing and also in rubber processing.
11 Coating molding
It is a process of using plastic sol or organic sol to coat the surface of a substrate such as cloth or paper to make imitation leather products, varnished cloth or plastic wallpaper, or to coat powdered plastic on the metal surface. Common plastic coated products include artificial leather, varnished cloth, plastic wallpaper and various metal coated products.
12 Casting molding
It is a method of plastic processing. Early casting was to inject liquid monomers or prepolymers into a mold under normal pressure, and then solidify and mold into a product with the same shape as the inner cavity of the mold after polymerization. In the 1960s, nylon monomer casting appeared. With the development of molding technology, the traditional casting concept has changed. Polymer solutions, dispersions, polyvinyl chloride pastes and melts can also be used for casting.
13 Drop molding
The technology uses the variable state characteristics of thermoplastic polymer materials, that is, it has viscous flow under certain conditions, and can restore the solid state at room temperature. It uses appropriate methods and special tools to spray ink, and molds it into the designed shape as required in its viscous flow state, and then solidifies it at room temperature.
14 Cold press molding
It is a kind of compression molding. Unlike ordinary compression molding, the material is pressurized and molded at room temperature. The molded product can be heated again or matured by chemical action after demolding.
15 Compression molding method
It is mainly used for the production of thermosetting plastic products. The molding is heated to melt, pressurized and punched, and then heated and cross-linked and solidified. The product is obtained after demolding.
16 Resin transfer molding
It is a process method that injects resin into a closed mold to infiltrate the reinforcing material and solidify it. This technology can eliminate the need for prepreg and autoclave, effectively reducing equipment costs and molding costs.
This technology has developed rapidly in recent years and has been widely used in the fields of aircraft industry, automobile industry, shipbuilding industry, etc., and has developed multiple branches such as RFI, VARTM, SCRIMP, SPRINT, etc. to meet the application needs of different fields.
17 Extrusion
It is a pressure processing method that uses a punch or a punch to pressurize the blank placed in the die to produce plastic flow, thereby obtaining a product corresponding to the mold hole or the shape of the concave and convex mold. During extrusion, the blank produces three-dimensional compressive stress, and even the blank with low plasticity can be extruded.
18 Thermoforming
It is a special plastic processing method for processing thermoplastic plastic sheets into various products. It is a special plastic processing method for processing thermoplastic plastic sheets into various products. The sheet is clamped on the frame and heated to a softened state. Under the action of external force, it is pressed against the mold surface to obtain a shape similar to the mold surface. After cooling and shaping, it is trimmed to form a product.
19 3D printing
It is a kind of rapid prototyping technology. It is a technology that uses powdered metal or plastic and other bondable materials as the basis of digital model files to construct objects by printing layer by layer. 3D printing is usually achieved using digital technology material printers. It is often used to make models in the fields of mold manufacturing, industrial design, etc., and then gradually used for the direct manufacturing of some products. There are already parts printed using this technology.
There are many different technologies for 3D printing. The difference between them is that they create parts in the form of available materials and in different layers. Common materials for 3D printing are nylon glass fiber, polylactic acid, ABS resin, durable nylon material, gypsum material, aluminum material, titanium alloy, stainless steel, silver plating, gold plating, and rubber materials.
