People often put the packaged objects on the outside of the vacuum chamber to complete the vacuum packaging equipment called the external vacuum packaging machine. The external vacuum packaging machine is mainly designed for vacuum packaging of larger packaging materials.
Second, the principle of the external vacuum packaging machine:
Different from the structure of the internal vacuum packaging machine, the external vacuum packaging machine is placed in the packaging bag of the package through the air suction nozzle, evacuates the air, exits the air suction nozzle, and then completes the sealing. External vacuum packaging machines generally have 1 to 4 suction nozzles. The power source of the sealing line is generally a cylinder or a motor.
Third, the classification of external vacuum packaging machine:
The external vacuum packaging machine is divided into a horizontal external vacuum packaging machine and a vertical external vacuum packaging machine according to different placement positions of the packaging materials. The packaged contents of the horizontal outer vacuum packaging machine are horizontally placed; the packaged contents of the vertical outer vacuum packaging machine are placed vertically. Horizontal vacuum packaging machines are more common on the market.
4. Contents to be noted when purchasing an external vacuum packaging machine:
When selecting the external vacuum packaging machine, it should not be selected according to the model. Generally speaking, because the food (packaging) produced by each user is not the same, the packaging size is not the same, and the technical grade of vacuum packaging is required. Different, different work efficiency requirements (production size, etc.), but should be based on the characteristics of the user's own products (including: liquid, solid, powder, gelatinous, semi-liquid, pickled products, meat cooked food, seafood, etc.), The size of the bag (including the width of the bag, the length of the bag, the height (thickness) after the item is loaded to determine which model is suitable for the user.) The main basis for the user to determine the model is the package. The sealing length of the machine, the double row spacing, the vacuum chamber can be used, the production efficiency of the whole machine is high and so on.
Tunnel Indicator Traffic Light
Tunnel indicating traffic lights
1. The red cross and green arrows are outdoor traffic lights:
The tunnel red cross green arrow needs to withstand the baptism of severe cold and heat, sun and rain, so the red cross green arrow shell produced by our Weimeimei is a sheet metal chassis, the sheet metal chassis is made of cold-rolled sheet, and the cold-rolled sheet has surface quality Good, non-reflective, anti-glare, fully enclosed, weather-proof, weather-proof, in line with IP65 protection level; with good stamping performance, excellent processing and other characteristics.
Products supported by cold-rolled plates are sturdy and durable, and have a long service life. The display box adopts the rear door opening method, and the LED display adopts the modular design of the unit, which can be repaired in the front. The structure is not only convenient for maintenance, but also has necessary safety precautions.
2. Electro-optical signs
With the economic development of various provinces and cities, the construction of highways connecting various regions has been gradually improved, and there are more and more long tunnels and extra-long tunnels. Road tunnels are enclosed spaces with limited traffic space and difficult air circulation. They rely solely on the original reflective traffic. Signs in the tunnel will quickly lose the reflective effect due to air, oil, dust and other impurities. In order to better indicate the traffic safety in the tunnel and overcome the impact of air pollution by the single-reflective film, the active light-emitting form is adopted, so There is an electro-optical sign.
Tunnel indicator traffic light,Tunnel red cross green arrow traffic light,Electro-optical traffic signs
Shenzhen Wide Way Optoelectronics Co., Ltd. , https://www.wdmtrafficlight.com