Views: 1258 Author: Site Editor Publish Time: 2024-06-10 Origin: Site
The Dragon Boat Festival, the 5th day of the 5th lunar month, has had a history of more than 2,000 years. It is usually in June in the Gregorian calendar.
Every year, the Loong Boat Festival is the most traditional festival of the Chinese nation, also known as the Dragon Boat Festival.
There are many customs on Loong Boat Festival, because the"Dragon Boat Festival" is also called the "heavy five", and many customs are also associated with the number of "five".
Tie red, yellow, blue, white, and black silk threads around a childs neck, wrists, or ankles,which is called a long life strand. Each family should the "Five Ends": calamus, mugwort,
pomegranate flower, garlic, and dragon boat flower. South China will eat "five yellow" foodduring the Loong Boat Festival: yellow croaker, cucumber, Salted duck egg yolk, Zongzi
wrapped in bean petals, realgar wine. Regardless of the north or south, on this day, it is still necessary to use realgar to draw the character "Wang" on childrens foreheads and wear
colorful sachets.
On this day, the main activities are Loong Boat racing and eating Zongzi. It is said that the Loong Boat race is to save the patriotic poet Qu Yuan who died in the Miluo River. To throw
Zongzi into the river is to let fish, shrimp and crabs eat enough and stop eating Qu Yuans
remains.
Loong Boat Festival is really a colorful festival.
This article cautions against pursuing excessively short injection molding cycles (e.g., 2.8 seconds), outlining 20 improper high-speed practices and their consequences. It covers material degradation, gas entrapment, mold and machine component fatigue, hydraulic system damage, and mechanical failures, emphasizing that aggressive cycle reduction compromises part quality and equipment reliability rather than yielding genuine efficiency gains.
the use of three-dimensional response surface methodology (RSM) to optimize twin-screw extrusion parameters—temperature, screw speed, and throughput. By analyzing their interactions, RSM overcomes the limitations of traditional single-factor adjustments. Through a Box–Behnken design, response surfaces are generated to visualize performance sensitivity and identify a multi-objective optimum that balances mechanical properties with production efficiency.
Because every machine and material is different, you can’t blindly copy exact numbers. Here’s a rule‑of‑thumb rhyme to judge if your back pressure is right: “Smooth charging, no slipping; stable cushion, small deviation. Check the surface for smoke—smooth, bubble‑free, no drooling.” Next time you run into dimensional instability, surface gas marks, or color‑change issues, don’t rush to tweak injection speed. Calm down, look at the back pressure gauge first, adjust back pressure, and the problem that’s been haunting you for days might just solve itself.
This article presents four practical methods for accurately assessing screw wear in extrusion and injection molding machines without disassembly. The methods include melt pressure and position data testing, a pressure drop/backflow evaluation, process reverse deduction through torque and temperature anomalies, and direct borescope inspection. Diagnostic logic linking common symptoms—such as output loss, temperature overshoot, and pressure instability—to specific wear locations is also provided.
the wear-induced failure of screws and barrels, noting the limitations of chrome plating and nitriding. It investigates the feasibility of surface boriding treatment on 45 steel screws and barrels to enhance surface hardness and wear resistance, and validates the process through field testing.
