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About Us
携手并进，共创辉煌！
Jinan Longao CNC Machinery Co., Ltd. is an enterprise dedicated to the design, development and production of precision CNC engraving equipment. Over the years, remarkable achievements have been made in the research and development and production of precision machine design and engraving technology, and the product quality has passed the EU CE certification and has been widely recognized. -
Product Center
携手并进，共创辉煌！
Jinan Longao CNC Machinery Co., Ltd. is an enterprise dedicated to the design, development and production of precision CNC engraving equipment. Over the years, remarkable achievements have been made in the research and development and production of precision machine design and engraving technology, and the product quality has passed the EU CE certification and has been widely recognized. -
News Center
携手并进，共创辉煌！
Jinan Longao CNC Machinery Co., Ltd. is an enterprise dedicated to the design, development and production of precision CNC engraving equipment. Over the years, remarkable achievements have been made in the research and development and production of precision machine design and engraving technology, and the product quality has passed the EU CE certification and has been widely recognized. -
ABOUT US
JINAN LONGAO CNC MACHINERY CO., LTD
Jinan Longao CNC Machinery Co., Ltd. is an enterprise dedicated to the design, development and production of precision CNC machinery. Over the years, remarkable achievements have been made in the research and development and production of precision machine design and engraving technology. The product quality has passed the EU CE certification and has been widely recognized by users all over the world.
Our main products are DT series CNC engraving machine, optical fiber cutting machine, optical fiber welding machine, etc., mainly used in advertising, woodworking processing, mold processing, metal processing and other industries. Our company insists on adopting high-end accessories in the industry, such as Italian HSD/Colombo spindle, Taiwan Delta inverter, Ruike/Chuangxin/Tottenham laser, Japan Panasonic, An Chuan servo motor, Taiwan Shangyin/Yintai guide rail and other original imported accessories to ensure the accuracy and quality of the machine. In addition, the company can meet the different production needs of customers, tailor-made machines for customers, and improve production efficiency.
Longao CNC-Product Display
Our main products are DT series CNC engraving machine, optical fiber cutting machine, optical fiber welding machine, etc., mainly used in advertising, woodworking processing, mold processing, metal processing and other industries
Longao CNC · News
With excellent product quality, high-end technology, excellent sales team and high-quality service, our products have been sold in many countries and regions in the world.
01-29
2024
Properties of metals
The cutting performance of metal includes: ① fluidity, the ability of liquid metal to fill the mold; ② shrinkage tendency, large volume shrinkage from liquid to solid, easy to produce defects such as shrinkage cavity, and large linear dimensional shrinkage, which affects the final dimensional accuracy of castings; ③ hot cracking tendency, some metals and alloys are prone to cracks and segregation tendency in the cutting process.
01-29
2024
Handling and Inspection
Mold (liquid metal into a solid casting container) preparation, mold according to the materials used can be divided into sand, metal, ceramic, mud, graphite, etc., according to the number of use can be divided into one-time, semi-permanent and permanent, mold preparation is the main factor affecting the quality of castings
01-29
2024
Machining allowance
Gravity cutting It is widely used in the production of various non-ferrous castings, but metal mold cutting also has the disadvantages of low metal utilization rate, difficult pouring of thin-walled complex castings, and low relative pressure cutting of casting tissue density.
01-29
2024
When using metal type cutting, the following factors must be considered
When using metal type cutting, the following factors must be considered comprehensively: long manufacturing cycle, high cost, not suitable for single-piece and small-batch production; It is not suitable for cutting complex shapes (especially inner cavities), thin-walled and large castings (metal molds are limited by the size of mold materials and the ability of cavity processing equipment and cutting equipment, so metal molds are not suitable for the production of particularly large castings). The mold is more expensive than sand mold and cheaper than die casting.
Contact: Mr. Huang
2332C, Building 1, Aosheng Building, 1166 Xinling Street, Jinan District, China (Shandong) Pilot Free Trade Zone