【Abstract】Introduced characteristics of polyphenylene sulfide material, combined with a certain type of fixed plate plastic parts, injection molding process of slender, cross-arranged and thin-walled microporous plastic parts is analyzed, injection molding mold structure and mold parts processing technology are explored, analyzed mold base selection, parting surface selection principle, demoulding structure design of mold; focused on … Continue reading Design of Injection Mould for Slim and Microporous Plastic Parts
1 Injection speed 01 What is injection speedUsually injection speed we set refers to speed at which screw advances. But what is really important is speed at which melt advances in cavity, which is related to size of cross-sectional area in direction of flow.02 How to determine injection speedAs a principle, injection speed should be as fast as possible.Its … Continue reading From what to how, 11 basic parameters of injection molding process, strength explanation!
One. PC Features:①Amorphous plastic, no obvious melting point, glass transition temperature 140～150℃ melting temperature 215℃～225℃, molding temperature 250℃～320℃.②Viscosity is large, and it is more sensitive to temperature. It has good thermal stability in normal processing temperature range. It will not decompose after a long stay at 300℃. It will start to decompose when it exceeds 340℃. … Continue reading How to choose screw for different raw materials?
A successful hot runner mold application project requires multiple links to be guaranteed. Among the most important are two technical factors: one is control of plastic temperature, and the other is control of plastic flow. 1. Control of plastic temperature is extremely important in application of hot runner molds. Many processing and product quality problems that occur … Continue reading Do you knowkey technology of hot runner application?
[Abstract] Improvement process of structural design of sliding block in fixed mold of injection mold of telephone receiver shell is analyzed, a method of improving quality of product and prolonging service life of mold is introduced. 1 Introduction Quality, performance and service life of mold are determined by multiple factors such as quality of mold … Continue reading Improvement of Slider Structure in Fixed Mould of Injection Mould
According to structural characteristics and technical requirements of plastic parts, a pair of 1 three-plate injection mold with 1-cavity was designed. It uses point gate feeding, through T-shaped block, oblique guide post + slider, slider built-in oblique push block and other composite core pulling mechanisms, which solves problem of inverted mold release in multiple directions. Production practice shows … Continue reading Design of Injection Mould for Vacuum Cleaner Shell
Temperature control system design:1. In design of automotive injection molds, each mold needs to use Moldflow software for cooling deformation analysis during design process, then adjust temperature control design system for areas with large product deformations or areas with high molding temperatures.2. Design cooling water circuit for fixed mold as far as possible in accordance … Continue reading 8 precautions for mold design: temperature control system design
Overview In injection molding, polymer material is heated to a molten state for processing. At this time, melt can be regarded as a continuous medium, a flow field is formed in certain parts of machine, such as screw, barrel, nozzle and flow channel of mold cavity. In flow field, melt undergoes stress, time, and temperature … Continue reading Do you know rheological properties of polymers?
Water-loving nylon structure Polyamide fiber is commonly known as nylon (Nylon), English name Polyamide (PA), density 1.15g/cm3, is general term for thermoplastic resins containing repeating amide groups—[NHCO]— on molecular backbone, including aliphatic PA, aliphatic-aromatic PA and aromatic PA. Among them, aliphatic PA has many varieties, large output and wide application, its name is determined by specific … Continue reading Effect of nylon on properties after absorbing water!
1. PS (Polystyrene) 1. PS performance: PS is an amorphous polymer with good fluidity and low water absorption (less than 00.2%). It is a transparent plastic that is easy to mold and process. Light transmittance of its products is 88-92%, coloring power is strong, and hardness is high. However, PS products are brittle, prone to internal … Continue reading Physical properties and processing technology of common engineering plastics