How to solve the welding line of plastic products processing?
From food storage to toiletries, from bags to water bottles, we rely entirely on plastic processing. There is no doubt that plastic manufacturers are a good choice in terms of availability and price. But before you continue to use plastic containers occasionally, stop and think about how this affects your health. Even if you are particularly careful about what you eat, using only plastic containers can put your health at risk. In the long run, the compounds in these seemingly harmless plastic containers can also affect your health.
1. Daily contact causes health questions
Plastics are harmful to your health in a variety of ways, due to a compound called phthalates. Phthalates are usually used to increase the flexibility of plastics and have no effect on the human body. Exposure to these compounds can be achieved by inhalation, reception (through food stored in containers) or absorption by the skin (through frequent contact), and when people taste, mechanical stress causes the release of phthalates, which enter the body. Manufacturers of finished plastic products
Studies have not established safe levels of exposure to phthalates. Poorly, you are exposed to small amounts of phthalates every day. While there is not enough evidence to show the risks of phthalates to human health, animal studies have found that exposure to phthalates can cause reproductive and genital disadvantages.
2. Harmful compounds can penetrate into food
Chemicals in plastic containers can be immersed in stored food or water. This is why plastic containers should not be microwaved, as plastics release chemicals once heated. When plastic comes into contact with hot water, it produces feedback similar to microwave oven heating.
Whether washing or storing, keep hot water away from plastics, because chemicals released from plastics can mimic human estrogen and increase the risk of several diseases. Glass or ceramic containers should be used instead of plastic for heating disposal, and old plastic containers that have been overheated should be discarded.
Also, keep in mind the quality of the plastic container you are buying. Plastic items are accompanied by a number on the bottom of the product to indicate the quality, and those with the numbers 2, 4 and 5 are selected because they are considered safe and can be used for food storage. Manufacturers of finished plastic products remind you to avoid containers numbered 1, 3 and 7 because they can release harmful chemicals such as bisphenol A (bisphenol A) or phthalates.
3. Plastic risk environment
One of the main questions associated with plastic processing is that it is not biodegradable, which means that it takes about 100 to 1,000 years to degrade in a landfill. It also pollutes land, air and water. Plastic bags floating on the surface of the water once brought aquatic life to the brink of extinction.
In the process of injection molding of plastic finished products, when it is found that the plastic melt fills the cavity, if two or more strands of melt meet and the front section has cooled on one side, so that it cannot be completely equipped, a groove will be generated at the intersection and a welding mark will be formed.
Plastic mold manufacturers analyze the cause of plastic finished product welding marks:
The plastic melt passing through the gate at high speed simply enters the cavity, then touches the surface of the cavity and solidifies, and then is pushed by the subsequent plastic melt, leaving snake traces.
When the mold accepts the multi-gate pouring scheme, the rubber activity pioneers converge with each other; Pore position and stagnant area, the pioneer of compound activity will also be divided into two; Environments with uneven wall thickness can also cause weld marks.
Side gate, when the plastic passes through the gate without retardant area or insufficient amount of stagnant area, spray marks are easily generated.
Plastic product processors provide plastic finished product welding line handling countermeasures:
1. Reduce the number of gates.
2. Adjust the gate position.
3. Add a material overflow well near the left of the fusion part, move the fusion line to the overflow well, and then cut it off.
4. Enhance the exhaust in the fusion line area to quickly evacuate the one-sided air and volatiles. Raise the material temperature and mold temperature to enhance the mobility of the plastic and improve the material temperature when equipped.
5. Change the position and quantity of gates, and move the position of the fusion line to another place.
6. Increase the injection rate.
7. To improve the needle pressure, it is necessary to increase the size of the pouring system.