PC/ABS is a thermoplastic plastic made of PC and ABS, which combines the excellent characteristics of the two materials.
Can be widely used in automotive trim, lampshade, handle, and other parts; Home and commercial appliances such as computers and peripherals, such as mobile phones, can be used instead of PCS for thin-walled, long-flow products.
Camera parts, instrument panel, FAN cover, hard hat housing, screw cap, radiator grille, computer and optical equipment housing, hair dryer, coffee pot, etc.
Injection grade ABS/PC alloy refers to a class of ABS/PC alloy with a high melt flow rate suitable for the actual injection molding process.
This kind of material has good melting fluidity, easy processing molding, heat flow resistance, and good rigidity.
Mainly used in automotive interior and exterior decoration materials, mobile phone shells, and laptop shells. The common problems and solutions in the injection molding process of PC/ABS alloy are as follows:
The solution:
For poor dispersion, add dispersant or oil, increase injection molding temperature, and add back pressure. Keep an eye out for mold problems.
Try something else. Whether the baking material temperature time is sufficient. Mold temperature adjustment.
The warping deformation of injection molding parts is due to the unreasonable design of parts, improper gate position, and injection processing conditions are not reasonable.
So the internal stress, uneven or excessive shrinkage caused by the mold temperature is too high or the mold temperature is not uniform, causing the mucous membrane of the parts and demold difficult, or cooling is not uniform, the same will produce warping deformation.
The solution:
Processing technology: lengthen the injection molding cycle, reduce the injection temperature, adjust the injection pressure and injection speed properly, slow down the ejection speed, increase the ejection area, and maintain the balance of the ejection force; product design: increase the wall thickness, increase the reinforcement and the reinforcement at the rounded corner can reduce the warping deformation;
Flow marks are produced when the material is injected. The reason is that the material has poor fluidity.
Unlike silver marks, flow marks are not caused by moisture or material decomposition, and their appearance is also different.
The solution:
It can be avoided by increasing the material temperature to improve fluidity. It can also be solved by increasing the mold problem to increase the material fluidity in the injection mold and reduce the injection speed.
Shrinkage cavity is caused by the insufficient high-speed filling of material in the mold cavity
The solution:
Appropriately raising the mold temperature and material temperature to improve the material fluidity, extend the injection pressure holding time, increase the injection pressure, and increase the injection speed to improve the mold filling, can also increase the size of the gate, heating the gate runner to reduce and eliminate the shrinkage of products.
It is usually caused by “melt rupture” caused by the expansion of molten material into the mold cavity during the high-speed injection.
The solution:
Injection molding process: to increase the temperature of the material, increase the nozzle temperature, slow down the injection speed to reduce the appearance of markings;
Mold: increase mold temperature, add overflow groove, increase gate size, and modify gate shape.
Bad silver wire is the most common problem of PC/ABS materials, silver wire is also known as silver grain, spray, material flower, etc., is in the product surface along the flow direction of silver hair white filamentous-stripe phenomenon.
The main reason is the interference of gas, which is mainly divided into three components:
Air: air involved in the glue melting and injection stages;
The moisture contained in the material itself;
Pyrolysis gas: gas produced by high-temperature hydrolysis/thermal decomposition.
The solution:
Firstly, check whether the material is sufficiently dry. After confirming that the material is sufficiently dry, adjust the injection molding process to improve the silver wire defects. At the same time, bad injection silver wire is also related to mold exhaust.
Expain 3 shot injection molding process
EVA injection molding is a versatile process with a variety of applications. EVA injection molding is used in many industries, including the mass production of sporting goods and toys. In the sports industry, EVA injection molding is used to make everything from shoes to helmets.
Injection molding is a process in whih the material normally plastic,is injected into a mold to produce a componenet.
Injection molding is the manufacturing process for producing parts from thermoplastic and thermosetting plastic materials.
Injection molding simulation is the process of modeling the plastic injection molding processes using computer software.The software allows the user to input various injection molding parameters such as material type, melting point, gate size and location, runner size and location, and part geometry.
Injection molding is the manufacturing of products out of plastic. It can be used to create a wide variety of shapes and sizes. For products, it is a complex process and many things can go wrong. That’s why simulation is indispensable for injection molding. True allows you to test your product in real production, which helps you avoid mistakes and is indeed your guarantee. So if you want to start using injection molding in your business, make sure you use simulation too. It will save you a lot of time and money in the long run. What is injection molding simulation and how does it work? Injection molding simulation is the process of modeling the plastic injection molding processes using computer software. The software allows the user to input various injection molding parameters such as material type, melting point, gate size and location, runner size and location, and part geometry. The software then uses these process parameters to generate a 3D model of the injection molding process. The model can be used to optimize the injection molding process and improve part quality. Additionally, the use of simulation can reduce the need for prototype testing, saving time and cost.
Hey there,Blow molding is a manufacturing process by which hollow plastic parts are formed. In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and injection stretch blow molding. The blow molding process begins with melting down the plastic and forming it into a parison or in the case of injection and injection stretch blow moulding (ISB) a preform. The parison is a tube-like piece of plastic with a hole in one end through which compressed air can pass.- noizyoyster.com
Go to wikipedia and look up injection molding. You can also try www.mozdex.com/injection-molding-basics. Injection molding involves first having an injection molding machine. Second you must choose what shape you want to create, and have it drawn by a mechanical engineer. Then you must have the dies made at a machine shop to your specifications. Third you must select the type of plastic you want to make it out of, and set up your injection molder accordingly, and set it to run.
The time required to complete the injection molding process is called the molding cycle, also known as the molding cycle.The molding cycle directly affects labor productivity and equipment utilization, so the production process should be on the premise of ensuring quality, as far as possible to shorten the injection molding cycle at each relevant time.
Injection molding is a commonly used manufacturing process for the fabrication of plastic parts. the injection molding process need injection mold and injection machine.--------------------------------------------------------Injection molding is a manufacturing process for producing parts from both thermoplastic and thermosetting plastic materials. Material is fed into a heated barrel, mixed, and forced into a mold cavity where it cools and hardens to the configuration of the mold cavity.After a product is designed, usually by an industrial designer or an engineer, molds are made by a moldmaker (or toolmaker) from metal, usually either steel or aluminium, and precision-machined to form the features of the desired part. Injection molding is widely used for manufacturing a variety of parts, from the smallest component to entire body panels of cars.the following is a photo of the injection molding process:http://www.vulcanmold.com/article/Plastic-Injection-molding-process.htmlA Hollow mould is made from steel in several parts. when the mould is all together the hollow within it is the same shape as the object you wish to produce. The mould is water cooled to keep its temperature under control. molten plastic is forced into the mold at high pressure. it is left to cool for a specified period of time, then the mold is pulled apart in such a way that the object falls out of the mould and the whole thing starts all over.
Virtually anything made of plastic can be made by injection molding. Everything from plastic cups to car parts and aircraft parts are made by this process.
When the injection molding process parameters need to be adjusted for reasons other than a chromatic aberration, the injection production temperature, back pressure, injection cycle and the amount of color masterbatch added should not be changed as much as possible. At the same time, the influence of the process parameter change on the color should be observed.