Temporary Suspension of Entry In view of the rapid spread of COVID-19, China has decided that foreign nationals holding visas or residence permits can not enter China temporarily from March 28, 2020. The temporarily suspended visa policies and entry : entry with APEC Business Travel Cards port visas 24/72/144-hour visa-free transit policy Hainan 30-day visa-free policy 15-day visa-free policy specified for foreign cruise-group-tour through Shanghai Port Guangdong 144-hour visa-free policy specified for foreign tour groups from Hong Kong or Macao SAR Guangxi 15-day visa-free policy specified ..read more

( Updated: 2020.05.28 ) Travel to China 1. The most important thing you need： Food，Food，Food  For a long time, long time, long time. No food supply, staying at the airport, waiting for the immigration process (Some people have waited for 12 hours). 2. Immigration process at airport and 14-day Isolation  (1) At the airports in  China  (2) Fourteen-day Quarantine    ( Environment / Fee / Notes )  3.Our Assistance for Free  1. The most important thing you need： Food，Food，Food (1) Pack your luggage with more food like biscuits and chocolates, water, ma ..read more

China’s goods trade in the first 4 months of 2020 (USD denominated) Total value of imports and exports               1.3 trillion                              down 7.5% Exports                                                          678.28 billion                      down 9 ..read more

Trigger sprayers are commonly made from polypropylene (PP). They are mounted on various designed containers that have liquid content. These products can be just plain water, cleaning agents, chemicals, etc. The advantage of using trigger sprayers is that they can be locked at the end of the nozzle. That is an excellent feature for children’s safety because some liquids can pose hazards to children. Hence, they are not just beneficial, but also protect the liquid from possible leakage. Our products are inspired by three main factors, namely the purpose of use ..read more

Part Ⅱ 3. Features and selection of precision injection machine 3.1 Features in technical parameters According to injection pressure, ordinary machine: 147 ~ 177MPa precision machine: 216 ~ 243MPa ultra-high pressure machine: 243 ~ 392 MPa The reasons why precision injection molding machines must be high pressure are: (1)  To improve the precision and quality of precision products, injection pressure has the most obvious impact on the shrinkage of products. When the injection pressure reaches 392MPa, the molding shrinkage rate of the product is almost zero. At this time, the accurac ..read more

Part Ⅲ 4. Shrinkage problems in precision injection molding There are four factors that affect shrinkage: thermal shrinkage, phase change shrinkage, orientation shrinkage and compression shrinkage. 4.1 Thermal shrinkage It’s the inherent thermal physical properties of molding materials and mold materials. If the mold temperature is high, the product temperature will be high and the actual shrinkage rate will increase. So the mold temperature of precision injection should not be too high. 4.2 Phase change shrinkage The shrinkage results in the decrease of spe ..read more

Part Ⅰ 1. Concept When general injection molding machines and conventional injection molding processes can’t meet the requirements of the high dimensional repeatability of processed injection products, the precision injection molding will be used. The concept of “precision injection molding” is mainly different from “conventional injection molding”. It is based on the rapid development of polymer materials. And it also uses precision plastic parts to replace high-precision metal parts in the fields of instrumentation and electronics. At present, there are two defining indicators ..read more

❀ Injection molding The plastic material is first heated and melted in the heating barrel of the injection molding machine. And then the melt is pushed into the cavity of the closed mold by the reciprocating screw. It can produce high-precision and high-quality products under high productivity. What’s more, it can process a large variety of plastics and has a large output (about 1/3 of the total amount of plastic) and be widely used. Therefore, injection molding is one of the important molding methods in plastic molding and processing. ❀ Extrusion molding Extrusion ..read more

The reasons for poor gloss of plastic parts can be considered from mold, injection molding process, raw materials, etc. 1. Injection mold (1) If the mold cavity is poorly processed and has defects like scars, micro-holes, abrasion, roughness, etc., it will inevitably reflect on the plastic parts. Therefore, we should carefully process the mold for the less roughness of cavity surface. It can be polished and chrome plated if necessary. (2) If there are oil stains, water stains on the surface of the cavity or too much release agent, the surface of the plastic parts w ..read more

Gas-assisted injection molding technology is an emerging plastic injection molding technology. Its principle is to use high-pressure gas to produce a hollow section inside the plastic part. And use gas pressure to replace plastic injection pressure to eliminate product sink marks and complete the injection molding process. The gas-assisted injection molding process mainly includes: plastic melt injection, gas injection, and gas pressure holding. According to the difference of melt injection volume, it is divided into short shot and full shot. In the short shot, the gas first pushes the ..read more