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surface treatment solutions for die casting mold
Surface Treatment Solutions for Die Casting Mold Posted on : Sep 3 , 2022 By GREFEE Die casing model is one of the tools that are utilized to cast the metal parts, which is specifically completed on the die casting die forging machine. The basis process of die casting include: the metal liquid is injected into the mold cavity in a slow or high speed. The mold with moving mold cavity surfaces will be forged under pressure as the cooling of…
Between plastic injection molding and 3D printing molding
What is the difference between plastic injection molding and 3D printing molding? Posted on :Sep 13 , 2022 By GREFEE There are two main methods for the plastic products molding. One is through mold injection molding, and the other is through 3D printing technology. The plastic injection molding refers to melt the plastic material completely thought the stir of the screw bar under a certain temperature, and then inject the plastic into the mold cavity to obtain the ending products…
Main processes of mold injection molding
Main processes of mold injection molding Posted on :Sep 26, 2022 By GREFEE What are the processes of injection molding process? The plastic injection molding process mainly includes four stages, which are filling, pressure maintaining, cooling and mold releasing, which are an integrate and continual progress that directly affect the molding quality of products. Filling stage Filling is the first store of the whole injection molding process, which starts from the beginning of injection molding when the mold is clamped…
Quality issues and solutions of the TPR EVA
Quality issues and solutions of the TPR EVA plastic parts injection molding Posted on : Sep 30 , 2022 By GREFEE There is an asymmetry between the quality of the molded TPR EVA parts and the qualified standard, due to which it cannot process promptly, which is the quality issue of the TPR EVA. To under the cause for these defects and minimize it to the lowest level, we should start from the following aspects: mold, raw materials, process parameters,…
Die casting technology for automobile aluminum alloy lower cylinder block
Key points analysis and defects management of Die Casting Technology for Automobile Aluminum alloy lower cylinder block Posted on :Aug 19 , 2022 By GREFEE To achieve light weight vehicle, aluminum alloy material has been widely used in the automotive industry. The number of car parts made from die casting technology has been increasing. As the core part of automotive, a large proportion of material of the engine cylinder is aluminum alloy and casted iron. Aluminum alloy die casting cylinder…
Summary of properties of common plastic materials
Summary of properties of common plastic materials Posted on : Sep 23 , 2022 By GREFEE P S (polystyrene) Function of PS PS is a kind of amorphous polymer with good flowability and low water absorption (less than 00.2%), which is simple to form into clear plastic, of which the light transmittance is 88-92%. Its tinting strength and hardness are great. However, PS products are brittle and are easy to crack due to the internal stress. The thermal resistance is…
Solutions to common molding defects of injection molding
Solutions to common molding defects of injection molding Posted on : Aug 25 , 2022 By GREFEE Defects are common when using molds to process plastic injection molding parts, and this largely affects the processing efficiency. The following are common molding defects and solutions for plastic injection mold parts. Short shots Short shots refer to the products made are incomplete due to the molds are not fully filled. This defect usually appears on the farthest spot away from the gate or…
Things you need to be careful doing in the clear plastic injection molding
Things you need to be careful doing in the clear plastic injection molding Posted on : Aug 4 , 2022 By GREFEE As the light transmittance of clear plastic is high, so there is a strict requirement for the surface quality of plastic products, such as no spots and patterns, porosity, whitening, fringing, black spots, discoloring and uneven gloss. Therefore, during the whole injection molding process, there should be a rigorous and special requirements for the raw material, equipments, molds…
Application of special plastics and engineering plastics
Application of special plastics and engineering plastics in automobile interior and exterior decoration Posted on : Aug 6 , 2022 By GREFEE The plastic used in automotive have advantages than the traditional material, which mainly reflects on light weight, good appearance decoration effect, and multiple actual application functions, so it is quite favored by the automotive plastic parts suppliers. In addition, its good physical and chemical properties make it easy to be formed and save energy, which can be sustained use in…
Features and uses of common injection molding raw materials
Features and Uses of Common Injection Molding raw Materials Posted on : Aug 15, 2022 By GREFEE Common raw materials for injection molding include the thermal-plastic injection modeling materials, injection molding materials, etc. Each kind of material and its characteristic have a wide product range. The following is the injection molding material selection guide according to the properties and use of different varieties of materials. Polyvinyl Chloride (PVC) Features: Rigid PVC has high strength, excellent insulation, good chemical stability,…
Injection molding process of TPR material
Injection molding process of TPR material Posted on : Aug 23 , 2022 By GREFEE Typical, according to the condition of the properties of material and material supplement, the inspection should be carried out to check the appearance and process properties of materials before molding. The supplied particle have varying degrees of water, solutions, and other volatile low molecular substances, especially the TPR of which the water content is always exceeding the allowed limit. Thus, TPR should be fully dried…
11 kinds of surface defects and solutions of TPE injection molding parts
11 kinds of Surface Defects and Solutions of TPE Injection Molding Parts Posted on : Aug 17 , 2022 By GREFEE TPE injection molding parts are commonly used in toy dolls, toy tires, sucker dolls, fitness equipment, sporting goods, auto parts, etc. TPE injection molding products often have surface defects. GREFEE, the TPE injection molding manufacturers in China has collected and concluded 11 common surface defects and the solutions for the TPE injection molding manufacturers. Whitening It refers to that the…