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Cracking, including filament cracks on the surface of the part, Tiny-cracking, whitening, cracking, and damage due to the sticking of the part, the sticking of the flow path, or the traumatic failure, splitting and cracking according to the cracking time. There are mainly the following reasons: ◊  Processing: - If the processing pressure is too large, the speed is too fast, the more filling, the injection and the holding time are too long, the internal stress will be too large and crack. - Adjusting the mold opening speed and pressure to prevent demoulding cracking caused by rapid drawing of the work-piece. - Appropriately increase the mold temperature, make the parts easy to demould, and appropriately reduce the material temperature to prevent decomposition. -  Prevention of cracking due to weld line degradation due to plastic degradation caused by plastic degradation. - Appropriate use of the release agent and attention should be paid to the elimination of substa

Firstly, let us learn the basic structure of the injection molding machine: Secondly,we learn some basic theoretical knowledge of injection molding (questions were asked by interviewers frequently) 1, what is the runway effect: The runway effect can be called a high movement along the runway and a regular rhythm of movement. Before filling the thinner part, the fluid passes through the thicker part of the cavity quickly, and the runway effect will appear 2,  what is the shear rate :The rate of intense movement of molecules produced by the melt during the filling process is called the shear rate, that is called the shear rate, the motion trajectory generated during molecular motion, such as stretching, extrusion, bending, friction, and the like. The intense movement of the molecules produced during the filling process also causes the temperature of the melt itself to heat up again. Therefore, if the speed of injection is too high, the product will burn. This is another expl

-Nike unveils new shoes that can be tied using apple's Siri voice control Base on the news 29th Aug 2019, Nike on Thursday unveiled a new version of its' Adapt Huarache 'shoe,which is a redesign of the original Nike Huarache, which was introduced in 1991. Adapt Huarache supports Apple's Apple Watch and Siri voice assistant,which allow users to use Siri's internal motors to tie or unlace their shoes.(sina technology) -The 2019 world conference on artificial intelligence was held in Shanghai on Aug 29: Ma huateng: Tencent has established four AI laboratories and laboratory matrix for cutting-edge scientific and technological exploration  in the 2019 world conference on artificial intelligence, chairman and CEO of tencent ma said the company has set up four big AI lab, range from AI comprehensive basic research to the variety of application development, but also the establishment of a cutting-edge technology to explore laboratory matrix, robot, quant

More than 70% consumer will face a problem is that the phone case will turn yellow after they purchased a clear phone case from the store and use it for a while. Especially the soft bumper case and the cases were made of silicone and plastic, they are easier to turn yellow, which affects not only beautiful, but also the user’s experience Why the phone case became like this? Actually, there are a lot of reasons that why the phone case will turn yellow. The main reason is because of  the ultraviolet radiation  of the sun. If you usually use your smart phone with the case in outdoor, the case will turn yellow after a long time exposes under the sun. Yellowing of polymer materials is mainly due to a variety of degradation reactions (thermal, photo oxidation, radiation, oxidation). These reactions are chemical in nature, so they are irreversible, the reaction cannot be switched back from product(s) to reactants How to clean? We search some cleanning methods online and test. Le

Firstly, I would like to ask you one question: When will you charge you phone? A recent survey about "how much power your phone has left will make you anxiety," a lot of netizens discussed about it. I don’t know there are so many obsessive-compulsive users, until I read these comments… -"I don't feel safe until my phone’s power is 100 percent." If the battery is 100% full, some netizens hope that the battery is always full. If it is a bit less, she/he will feel panic. She/He can't wait for the phone to hang on the charger. - "30 seconds left to shut down! Frantically l looking for a charger" For patients with procrastination, it is not the last moment that they will not get up and look for a charger to charge  -"Never worry, I don’t care!" Of course, unflappable Internet users are everywhere, even if the battery is only 1% of the phone can continue to use as usual. Since so many people are full of panic about the re

According to the driving theory of the injection molding machine, the control system of the injection molding machine is composed of various circuits for processing power and controller to complete the movement and process actions The electric injection molding machine uses a servo motor to perform injection, plasticization, mold clamping, ejection, Therefore, it has high controllability and response characteristics ☆ Features of electric injection molding machine: -Since each action (injection, plasticization, melting, clamping and ejection) has independent servo motor drive, the electric injection molding machine consumes less energy than the hydraulically driven injection molding machine; -The use of cooling water to control the oil temperature is reduced because no hydraulic oil is used; -An oil-free environment is possible (no oil pollution); -Because there is no vibration problem in the hydraulic circuit of the traditional hydraulic system, low noise levels are pos

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As we know, the precision mold plays an important role in the injection molding manufacturing, so we need to know what should be considered when design the precision mold,let’s discuss them together: ◊ Know the requirement of the product As a mold designer, you need to know the requirements of the product, which is also the source of precision mold design. Therefore, the designer must be well known the requirements for the product,such as the shape and dimensional accuracy of the molded article, the flowing direction of the resin, the transmission of the injection pressure, and the solidification of the filled resin. ◊ The characteristics of the molded product We need a systematic list of the properties of the molded article, mainly the material, the shape of the molded article, and these will have an effect on some details design of the mold ◊ The structure of the mold The structure of the precision mold is different from the conventional plastic mold and the stru