Analysis of the causes of swelling and bubbling of injection molded products Some plastic parts are swollen or bubbling on the back of the metal insert or in a particularly thick part after the mold is released. This is because the plastic that is not completely cooled and hardened is caused by th
Read More1, start the motor, when the vacuum pump is operating normally, open the outlet pressure gauge and import vacuum pump, depending on their display of the appropriate pressure, and gradually open the gate valve, while checking the motor Load conditions. 2, the vacuum pump in operation, the bearing tem
Read MoreTable 1 High-strength bolt materials for wind power, domestic and foreign brands, performance specifications, standard number, remarks, EU grades, Japanese grades, US grades, S-class Chinese grades (borrowed), Chinese grades, high-strength bolts, high-strength bolts in wind power equipment, mostly
Read MoreWhat material is good for the ceiling ? Ceilings are common in today's renovations. Whether it is an ordinary family or an upscale hotel, ceilings need to be installed, and the hall decorated with suspended ceilings looks very beautiful. There are many styles of ceilings and there are a lot of
Read MoreThe advantages and disadvantages of the difference between microwave and Bluetooth for parking lots are now divided into Bluetooth and microwave, but many customers do not understand the essence of these two technologies. The true long-distance parking should have the following characteristics: F
Read MoreOn weekdays, some young girls like to buy some red hand straps and hand-make some button knots as gifts for their (male) friends. The button knot symbolizes auspiciousness and joy, and it also indicates that the lovers will always be concentric. It is a common mutual gift between male and female f
Read MoreAbstract Promoting the transformation of scientific and technological achievements is a market economy behavior. Relevant departments should evaluate the performance of the unit's scientific and technological achievements according to the annual report of the unit's scientific and tec
Read MoreThe fair-faced concrete, also known as decorative concrete, is named after its highly decorative effect. It is a cast molding and does not have any exterior decoration. It directly uses the natural surface effect of cast-in-place concrete as a finish. Therefore, unlike plain concrete, the surface
Read MoreSteel grille with high strength, anti-corrosion and durable, easy to install and disassemble. Do you know that the price of steel grilles is related to anything? Steel grating weight calculation and area calculation In the quotation of steel grid plate, the weight of the material used in steel grid
Read MoreThe heat exchanger sometimes vibrates during the normal operation. Sometimes there is only one vibration source. Sometimes there are several vibration sources. Some vibration sources are relatively easy to predict and prevent, and some vibration sources are relatively easy to
Read MoreIn the spring, the air is humid, and many wooden floors are affected by moisture, and there are phenomena such as arching and mildew spots. This is mostly due to the fact that the wood flooring products were not selected during the home decoration. So how can I choose a high-quality anti-retur
Read MoreSome people say that identification, this is not an expert? How do ordinary people understand such profound knowledge? In fact, as long as you understand some basic knowledge, you can easily identify the true and false of the solid wood bathroom cabinet and protect your rights. Langbang Sanita
Read More