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<p>With the continuous improvement and growth of the foundation of information technology, mechanical products in various industries are gradually realizing the operation mode of intelligent production. Especially in the machinery manufacturing industry, the improvement of the performance of the product itself and the improvement of the working principle will make the product itself have more market profit share in the market. </p><p><br></p><p>The working principle of the <a href="https://www.hisson.com/product" rel="noopener noreferrer" target="_blank"><strong>injection molding machine </strong></a>is similar to the syringe used for injection. It uses the thrust of the screw (or plunger) to inject the plasticized plastic in the molten state (that is, the viscous fluid state) into the closed mold cavity. The process of obtaining products after curing and shaping.</p><p> </p><p>Injection molding is a cyclic process, each cycle mainly includes: quantitative feeding-melting plasticization-pressure injection-mold filling and cooling-mold opening and taking parts. After taking out the plastic part, the mold is closed again for the next cycle.</p><p> </p><p>Injection molding machine operation items: Injection molding machine operation items include control keyboard operation, electrical control system operation and hydraulic system operation. The selection of injection process action, feeding action, injection pressure, injection speed, ejection type, temperature monitoring of each section of the barrel, and adjustment of injection pressure and back pressure are performed respectively.</p><p><br></p><p>The molding process of a general <a href="https://www.hisson.com/servo-injection-molding-machine" rel="noopener noreferrer" target="_blank"><strong>servo injection molding machine</strong></a> is as follows: first add granular or powdered plastic into the barrel, and make the plastic into a molten state through the rotation of the screw and heating of the outer wall of the barrel, and then the machine closes the mold and moves the injection seat forward. Make the nozzle close to the gate of the mold, and then pass pressure oil into the injection cylinder to push the screw forward, thereby injecting the melt into the closed mold with a lower temperature at a high pressure and a faster speed. Time and pressure hold (also known as holding pressure), cooling to make it solidify and form, then the mold can be opened to take out the product (the purpose of holding pressure is to prevent the backflow of the melt in the mold cavity, replenish materials into the mold cavity, and ensure the product Has a certain density and dimensional tolerance). The basic requirements of injection molding are plasticization, injection and molding. Plasticization is the prerequisite for realizing and guaranteeing the quality of molded products. In order to meet the requirements of molding, sufficient pressure and speed must be guaranteed for injection. At the same time, due to the high injection pressure, a correspondingly high pressure is generated in the cavity (the average pressure in the cavity is generally between 20 and 45 MPa), so there is a large enough clamping force. It can be seen that the injection device and the clamping device are the key components of the injection molding machine.</p><p> </p><p>There are three main aspects in the evaluation of plastic products. One is the appearance quality, including completeness, color, gloss, etc.; the second is the accuracy between dimensions and relative positions; the third is the physical properties, chemical properties, and electrical properties corresponding to the use. Performance etc. These quality requirements are different depending on the use occasion of the product, and the required scale is also different. The defects of the product mainly lie in the design, manufacturing accuracy and degree of wear of the mold. But in fact, the technicians of plastic processing plants often suffer from the difficult situation of using technological means to compensate for the problems caused by mold defects without great results.</p><p> </p><p>The adjustment of the process in the production process is a necessary way to improve the quality and output of products. Because the injection cycle itself is very short, if the process conditions are not well mastered, there will be an endless stream of waste. When adjusting the process, it is good to change only one condition at a time and observe a few more times. If the pressure, temperature, and time are all adjusted together, it is easy to cause confusion and misunderstanding. If there is a problem, I don't know the reason. The measures and means to adjust the process are various. For example, there are more than a dozen possible ways to solve the problem of product dissatisfaction, and only one or two main solutions to solve the problem can be truly solved. In addition, attention should be paid to the dialectical relationship in the solution. </p>
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