In the long fiberglass pa66 reinforced and toughened nylon particles industry, we often encounter such products. Some products are produced through the extrusion process, while others are the injection molding process. The two are completely different in production. It's possible that both use the same materials, but the process is different, and the resulting product performance is not the same. What we share today is the difference between extrusion and injection molding.
The difference between the two is mainly due to the continuous production of the extruder and the high production efficiency of the extrusion. If the amount of materials used for the single machining is concerned, the injection molding machine is adhering to the downside. This is mainly due to the intermittent production of injection molding machines and the completion of a mold. It is necessary to demold the product and repeat the previous work, but the injection molding machine can be used very rich in products, so a large number of specifications often require a lot of machines.
Extrusion industry is often personalized and customized. Since the extrusion process can be extended to meters, many varieties can be produced based on the difference in the number of meters, but it is difficult to form a large scale. The injection molding industry has standard specifications, truly varied. Is a mold, it is easy to achieve standardized mass production.
The large-scale extrusion professional production line has a large investment, and only a few powerful manufacturers can invest, but the production capacity and batch cost advantages that a big jump line can achieve are incomparable to small extrusion plants. The injection molding machine is not. Even only a few devices can form their own competitiveness.
Although the cost of extrusion equipment is often much higher than that of injection molding machines, we can often see that many extrusion companies have only one or a few production lines, more than a dozen of them. Injection molding machine manufacturers have hundreds of equipment, even It is not surprising that all points add up to a thousand.
The difference between the two is industry competitiveness, technological differentiation, product difficulty, etc. Extrusion processes are mainly volume-based. Each production and shipment is large, and injection molding is often much smaller, and The weight is often lighter, and the appearance and size requirements are extremely high, but the profit is relatively objective.
Then why both use the same material and produce different product performance? This is mainly different process, extrusion is a steady stream of material pulled from the machine, or extrusion, in the pressure of the machine perspective This method has always been under pressure relief. The pressure inside the machine is generally low, resulting in a low density of long glass fiber pa66 reinforced and toughened nylon pellets. Injection is used to inject material from the discharge port in the injection mold by increasing the pressure. It can be imagined from the injection of two words that the pressure is great, and sometimes there is a need to increase the pressure in order to injection molding, in the mold also need to maintain pressure operation to ensure the size and performance of the product, so the injection molding industry product density is higher. As you know, comparing the two, the product with high density has higher performance, and the density is smaller.
However, extrusion and injection molding have a commonality. That is, when using long fiberglass pa66 to strengthen the toughened nylon particles, they need to be dried. Because nylon itself is very polar, it has strong water absorption, and it is placed in everyday environment. Hours can not be used normally, materials must absorb water and must be dried. There are also some differences between the two drying equipments. Because the extrusion process is continuous, a hopper is often prepared on the machine. This hopper can be used for drying. And the role of continuous feeding; and injection molding equipment is almost no need to set up continuous feeding equipment, only a trough only, so the injection molding equipment drying need to prepare their own drying box, drying a few hours to come upside down Into the use of the machine, sometimes in order not to affect the production schedule, but also had to prepare more than one drying box at the same time work to prevent production interruption.
Imagine that the long glass fiber pa66 reinforced toughened nylon pellets can be used without being dried and directly poured into the machine. Can this idea be realized? Hengshui Jinlun Plastics' no-drying' product can be dried. For direct use, the long glass fiber pa66 reinforced and toughened nylon pellets are vacuum-dried before leaving the factory, the moisture in the high temperature vaporizes, and the water is directly pumped away in a vacuum environment. It does not get stuffy like a sauna. Affect the post-drying effect. After the drying is completed, the material is vacuum-packed to prevent water vapor from re-entering the package and affecting the use. In other words, as long as the inner package is not damaged, it can be directly poured into the machine and used directly.