Professional introduction of plastic processing equipment to provide you with all-round after-sales information
The emergence and use of plastic processing equipment has provided great convenience for the plastic products processing industry. In the long-term development process, plastic processing equipment has also been widely used and promoted. However, some users still have little understanding of plastic processing equipment, resulting in a series of problems in the use process. Therefore, in order to help the general public better use our equipment, we share some product knowledge for you to learn.
The working principle of the plastic processing equipment is similar to that of the syringe for injection. It is the process of injecting the plasticized molten plastic (i.e. viscous flow) into the closed mold cavity with the help of the thrust of the screw (or plunger), and obtaining the product after curing and shaping.
Injection molding is a cycle process, each cycle mainly includes: quantitative feeding – melting and plasticization – pressure injection – mold filling and cooling – mold opening and taking parts, and then close the mold after taking out the plastic parts for the next cycle.
Operation items of plastic processing equipment: the operation items of plastic processing equipment include three aspects: control keyboard operation, electrical control system operation and hydraulic system operation, including the selection of injection process action, feeding action, injection pressure, injection speed and ejection type, the monitoring of the temperature of each section of the barrel, the adjustment of injection pressure and back pressure, etc.
The molding process of the plastic processing equipment is as follows: firstly, the granular or powdered plastic is added into the barrel, and the plastic becomes molten through the rotation of the screw and the heating of the outer wall of the barrel, then the machine closes the mold and moves the injection seat forward to make the nozzle close to the gate of the mold, and then the pressure oil is introduced into the injection cylinder to push the screw forward, Thus, the molten material is injected into the closed mold with low temperature at a high pressure and fast speed. After a period of time and pressure maintenance (also known as pressure holding) and cooling, the mold can be opened and the product can be taken out (the purpose of pressure holding is to prevent the reverse flow of molten material in the mold cavity, supplement materials to the mold cavity, and ensure that the product has appropriate density and dimensional tolerance).
The basic requirements of injection molding are plasticization, injection and molding. Plasticization is the premise of realizing and ensuring the quality of molded products. In order to meet the requirements of molding, injection must ensure sufficient pressure and speed. At the same time, due to the high injection pressure, a high pressure is generated in the mold cavity (the average pressure in the mold cavity is generally between 20 ~ 45MPa), so there must be enough clamping force. It can be seen that injection molding, plastic processing equipment structure, injection device and clamping device are the key components of plastic processing equipment.
The above is the specific content of plastic processing equipment introduced to you today. Thank you for reading the article in your busy schedule. If you want to know the introduction of other relevant products, you can leave a message on the company’s website or call the hotline. Our employees will serve you wholeheartedly.
