“Happy birthday to you and happy birthday to youâ€, you can hear the sound of the music of the Lang Lang, the familiar rhythm, and catchy Lang. Today's clean sprinklers and conservation road bikes all ring into the music, indicating that they are in working condition. Although the city is different and the music that I think is different, it is all familiar music, and some are very penetrating. At first sight, I can't remember the name of the song. After the sprinkler has slowly opened, the familiar melody is imprinted in your mind. Perhaps you will pick it up unconsciously many times in the day.
 So what kind of music does the sprinkler have now? Let's summarize it now. "Jasmine", "Only Mothers Are Good", "Happy Birthday to You", "Orchid", "Alice", "Jingle Bell", "Honghe Water", "Tomorrow will be Better", "Jigong "Spring Story", "The Sun Shines," "Good Life, Peace," "Butterfly Lovers," "Longing," "The Moon of the Fifteenth," "Spring Moon Night," "The Wedding March," and "Love Song of Kangding." , "Love's Devotion," "The Demeanour of Blood," "Liuyang River," "The World Is Really Little," "Liang Shanbo and Zhu Yingtai," "Ode to Joy," "The Fairy," "Xiaofang," "One Thousand Years", "Two Tigers", "We Have Power for Workers", "In Spring", "Spring Moon Night", "Grateful Heart" and so on. Sprinkler red songs include: "Five-Star Red Flag fluttering in the wind", "Chairman Mao came to our farm", "The sun is red, Chairman Mao's most pro-", "Ten to send the Red Army", "Eastern Red" and so on. There are also songs that have been specially ordered by the local sanitation sprinklers department, such as "Scenery in Suzhou", "Where is Civilization", "Good Morning", and music with regional and educational significance. There are also some recent hit songs such as: "Little Apple", "Jiangnan Style", "the most dazzling ethnic style" and so on.
Â
Aluminum gravity casting Introduction:
The gravity casting means the part is injected by the earth's gravity. The generalized gravity casting includes sand casting, Metal mold casting (permanent mould casting), investment casting, Lost Foam Casting, Mud casting etc. The narrow meaning of gravity casting is metal mold casting (permanent mould casting).
The permanent mold casting is modern technology that the mould made by heat resistant alloy steel.
The metal liquid generally injected into the gate by manual. Full of cavity depend on weight of liquid metal, exhaust, cool, open mould and get products.
Process flow: smelting, filling cavity, exhaust, cool, open mould, heat treatment, downstream processing.
The characteristics of the aluminum gravity casting:
1. Less casting porosity, heat treatment can be performed. The strength of the product can be improved greatly after heat treatment, better than Die Casting Parts.
2. Product density is low, molding depend on the liquid weight, the density of the product is lower than die casting parts, its strength is slightly worse, but the elongation is higher.
3. The product surface finish is not high. Easy form similar blasting pit on the surface of casting products after cooling contraction.
4. Slow filling and low production efficiency, the production efficiency is only about a quarter compare the high pressure casting, caused the product cost is high.
5. Mould life is longer than die casting mould, and mould cost is low also.
6. Process is relatively simple.
7. Not suitable for production of thin wall parts.
The aluminum gravity casting conventional materials
Production and QC control of aluminum gravity casting
Aluminium Gravity Casting, Aluminum Gravity Casting Part, Aluminum Permanent Mould Casting, A356 Gravity Casting Part, Aluminum Low Pressure Casting Part, Aluminum Permanent Mold casting Part
NINGBO BEILUN LEMA MACHINERY TECHNOLOGY CO.,LTD , http://www.china-lema.com