In the long glass fiber pa66 reinforced toughened nylon granule industry, we often encounter products like this, some of which are made by extrusion process, and some are injection molding processes, which are completely different in production, although It is possible that the materials used are the same, but the process is different, and the resulting product performance is also different. What we share today is the difference between extrusion and injection molding processes.
The difference between the two is mainly that the extruder is continuous production, and the extrusion production efficiency is very high. If the amount of material used for processing from a single machine, the injection molding machine is inferior, mainly because the injection molding machine is intermittent production, and the model is finished. It is necessary to demould the product and repeat the previous work, but the injection molding machine can be used in a wide variety of products, so a large number of specifications often require a large number of machines.
The extrusion industry is often personalized and customized. Since the extrusion process can be extended into meters, many varieties can be produced according to the difference in the number of meters, but it is difficult to form a scale. There are standard specifications in the injection molding industry. The real variety is the mold, which is convenient for standardized mass production.
Large-scale extrusion professional production lines invest a lot, only a very small number of strength manufacturers can invest, and the cost advantages of capacity and batch size that can be achieved by a big jump line are unmatched by small extrusion plants. Injection molding machines are not, and even a few devices can form their own competitiveness.
Although the price of extrusion production equipment is often much higher than that of injection molding machines, we can often see that many extrusion manufacturers have only one or a few production lines, and more than a dozen. And injection molding machine manufacturers have hundreds of equipment, and even thousands of points add up to each point is not surprising.
The difference between the two is industry competition, technology differentiation, product difficulty, etc. The extrusion process is mainly based on volume, each production and shipment volume is large, and the injection molding is often much smaller, and The weight is often lighter, and the appearance and size are extremely high, but the profit is relatively objective.
So why do the two products use the same material to produce different products? This is mainly due to the difference in process. Extrusion is the continuous pulling of materials from the machine, or extrusion, in the internal pressure of the machine. This method has always been a state of pressure relief, and the internal pressure of the machine is generally low, resulting in a low density of long glass fiber pa66 reinforced and toughened nylon particles. Injection molding is to inject the material from the discharge port by increasing the pressure in the injection mold. It is conceivable that the pressure is large from the two words of the injection, and sometimes it is necessary to increase the pressure to form the injection molding, and the pressure is also required in the mold. Operation to ensure the size and performance of the product, so the injection molding industry product density is high. To sum up, the two products have higher performance and lower density.
However, there is a commonality between extrusion and injection molding, that is, the use of long glass fiber pa66 to strengthen the toughened nylon particles requires drying operation, because nylon itself is very polar, highly absorbent, and placed in the daily environment. It can't be used normally in hours, and the material must be dried after it has absorbed water. There are some differences in the drying equipment. The extrusion process is continuous, so a hopper is often prepared on the machine. This hopper serves to dry and continuously feed. The injection molding equipment has almost no need to set. Continuous feeding equipment, only one trough, so the injection molding equipment needs to prepare the drying box when drying, drying for several hours before it can be taken out into the machine, sometimes in order not to affect the production progress, but also have to Prepare several drying ovens to work at the same time to prevent production interruption.
Imagine that the long glass fiber pa66 reinforced toughened nylon granules can be used without being dried and poured directly into the machine. Can this idea be realized? Hengshui Jinlun Plastic Industry “free drying†products, do not dry Directly used, the long glass fiber pa66 reinforced and toughened nylon granules are vacuum dried before leaving the factory, and the water is vaporized at high temperature. In the vacuum environment, the water is directly removed, and it is not as boring as the sauna. It affects the drying effect in the later stage. After drying, the material is vacuum-packed to prevent the moisture from re-entering the package and affecting the use. That is to say, as long as the inner package is not damaged, it can be directly poured into the machine for direct use.
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