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Analysis Skills of Plastic Injection Molding Market

Jul. 13, 2023

Plastic extruders can be basically classified as twin-screw extruders. Different from plastic extrusion: screw plastic extruder. Let's understand the classification and application of PP film. 1、 Structure of extrusion plastic extruder: The extrusion plastic extruder is mainly used for the molding of various plastic products, and the shape of the product is developed according to the product characteristics. Extruded plastics must be plastic products with good molding performance, generally produced by means of molding, extrusion, blow molding, etc. These characteristics completely depend on the physical properties of plastics.

What is the molding method of PET plastic products? PET is one of the plastic products welcomed by many well-known plastic products in the industry. The molding methods can be divided into two types: direct extrusion, film compression molding and high-temperature extrusion.

Consumers' pursuit of appearance and the importance of choosing PET plastic products. Good PET bottles are usually made of heat-resistant, impact resistant, anti-aging and other materials. The advantages of these plastics are good glossiness, high transparency, high formability, high strength, convenient production, repeated processing, high transparency, and materials requiring high smoothness, which are used for packaging products.

The processed PET plastic can be made into transparent and colorful plastic bottles. With high transparency and transparent light, it is only applicable to products requiring heat sealing or transparent packaging.

PET film is a kind of transparent plastic widely used. Transparent PET plastic can usually be applied to the packaging of furniture, office supplies, instruments, computers, toys and other high gloss products, mainly including instrument helmets, outer packaging and ordinary bags, sportswear and industrial sundries.

PET polyethylene terephthalate is a kind of polymer that can be directly separated from bottles or plastics. It is usually made by mixing polymers (such as polyethylene, polypropylene, polyurethane, etc.) or plastics, and then extruding them through bottles or bottles. Under high temperature, it is kept in one area with one reaction zone. Generally, it is only necessary to cool the PET plastic bottle in the load and injection and cooling channels, and cool the bottle wall in the constant plastic temperature range. With the extension of time, the cooling rate will be converted to 50% of the original. The use of HDPE injection molding PA6 pipe in this area requires a larger heating device to cool and extend it.

In the selection of molding process, the cooling channel, component type, material flow and mold type shall be determined according to the process requirements of the product. The cooling channel near the cavity or core shall be mainly in the shape of finished products, and the positions of cooling channel and rubber inlet shall be marked. The cooling channel is set on one side, and the riser control is adopted to complete the cooling of components.

The surface of a tubular core has uniform and fine cavities, and the inner hole surface is smooth and fine. The surface of the hole is very rough. It is recommended to remove it with metal and reserve traces. Remove some residues with metal products to keep the residues in a good flow state, and clean some areas. When using liquid or film, remove bubbles by proper surface cleaning. And check the bottle mouth, PET bottle mouth, etc.

When you contact the surface of PET bottle with PE (polyethylene), carbon black shall be added from the plastic container to improve the surface quality in order to avoid that the surface cannot expose the plastic. When wiping with alcohol or alcohol, especially the part of bottle cap and spray, it is very difficult to eliminate black spots on the surface when wiping with alcohol or alcohol, and advanced solvent washing is required. If the electroplating part can be obtained by anodic oxidation, it must be anodized by local etching and activation. In order to avoid over electroplating, electroplating treatment must be carried out.

● Display of electronic concept: the proponent of structural design must identify the material type on the drawing and prevent equipment problems caused by wrong points during design.

● During the design and assembly process, the operators are required to perform specified processing according to the assembly drawings and drawings to ensure smooth assembly.

● Assembly process of parts: assembly drawings and appearance requirements must be clear through assembly drawings and appearance requirements, and shall not be carried out without drawing requirements.

● Check the wear of fastening parts and what methods are used to eliminate wear? If the surface of the part is bruised during assembly, the tool can be coated on the steel surface to reduce wear and thus prevent wear. If the surface damaged object is installed before, the dimension of its guide post must be measured and used if necessary.

A: Quenching and tempering of hot metals (such as copper, brass, aluminum, etc.) to make their hardness reach HB. Due to the corrosion of the parts quenched by the workpiece, the defects formed in the material must be eliminated, and the heat treatment deformation method of thermal expansion coefficient hardening shall be adopted.

B: The hardness of insert is higher than that of rolling, but lower than that of quenching. The hardness after tempering is less than HRC33 ° C and Rockwell hardness (HV).

Heating, quenching and tempering, rolling, forging, tempering, heat treatment, nitriding, heat treatment, vacuum quenching, tempering, carburizing and quenching, tempering.

After nitriding, the hardness is higher than that of cemented carbide, and ordinary carbon steel and alloy steel are higher. It is expected to obtain wear resistance, nitriding, nitriding and other properties with a long life.

Special process heat treatment is applied to soft steel and hard castings. Special steel, heat treatment, surface hardening treatment and mechanical treatment are adopted for quenching and tempering of Japanese steel and alloy die steel, heat treatment after forging and grinding, stress relief annealing, tempering and other heat treatment, as well as corrosion resistant special alloy, hot rolling, cold drawn steel and sand cold extrusion. In order to eliminate internal stress, tempering of Cr, Mo, V, Cr (VI) and V is adopted for steel heat treatment. The steel has less quenching deformation, less room temperature strength and higher hardness after tempering, but it can be deformed by cooling and has good strength and toughness.

● With good hardness and machinability after quenching, it can be used to manufacture various molds and parts with complex shape and withstanding large impact load, such as cold extrusion mold, cold drawing mold, shear mold, drawing mold, etc.

● It is used to manufacture parts with high performance requirements, such as rotary die, thread roller, lathe, spiral die, etc.

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