Injection molding process analysis
2019年4月26日 日常Injection molding process analysis
According to the structure, material and quality of the plastic parts, the molding process is determined as follows: The first step: In order to make the injection process smooth and ensure product quality, the following preparations should be made for the equipment and plastic used.
(1) Pretreatment of raw materials before molding
According to the requirements of materials for injection molding, the water content, appearance color and particle condition of the material are tested and tested for thermal stability, fluidity and shrinkage. The raw materials are preheated and dried, and the water absorption of the PS material is extremely low. It is generally not necessary to carry out the drying treatment before molding. If necessary, dry at 70 ~ 80 °C for 2 ~ 4 h. (2), cleaning of the barrel
The injection machine (mainly the barrel) needs to be cleaned or dismantled before using a certain plastic or an injection machine, or when it Plastic Bucket Mould Manufacturers is necessary to change the product, change the material, change the color or find decomposition in the plastic during production. change.
The cleaning of the plunger type injection machine barrel is often more difficult than the screw type injection machine, because the storage amount in the plunger type barrel is large and it is not easy to rotate, and the cleaning must be disassembled and cleaned or a special cylinder is used. For the screw type, it is usually direct refueling cleaning, and it can also be cleaned by air injection.
https://www.euramold.com/mould/daily-necessities-mould/bucket-mould/
According to the structure, material and quality of the plastic parts, the molding process is determined as follows: The first step: In order to make the injection process smooth and ensure product quality, the following preparations should be made for the equipment and plastic used.
(1) Pretreatment of raw materials before molding
According to the requirements of materials for injection molding, the water content, appearance color and particle condition of the material are tested and tested for thermal stability, fluidity and shrinkage. The raw materials are preheated and dried, and the water absorption of the PS material is extremely low. It is generally not necessary to carry out the drying treatment before molding. If necessary, dry at 70 ~ 80 °C for 2 ~ 4 h. (2), cleaning of the barrel
The injection machine (mainly the barrel) needs to be cleaned or dismantled before using a certain plastic or an injection machine, or when it Plastic Bucket Mould Manufacturers is necessary to change the product, change the material, change the color or find decomposition in the plastic during production. change.
The cleaning of the plunger type injection machine barrel is often more difficult than the screw type injection machine, because the storage amount in the plunger type barrel is large and it is not easy to rotate, and the cleaning must be disassembled and cleaned or a special cylinder is used. For the screw type, it is usually direct refueling cleaning, and it can also be cleaned by air injection.
https://www.euramold.com/mould/daily-necessities-mould/bucket-mould/
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