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Changshu smoothly da plastic products factory talk about extrusion mould permeability material solution
by：CSSSLD
2021-01-23
Also known as the mouth mold die die bite of blowdown, die head permeability material, fouling, extrusion process is a common problem.
The failure causes a variety of product defects, such as extrusion product surface visible lack of material, machining process interruption and product completely cracking, etc.
Encounter this kind of failure problem, processing manufacturers often have to spend time and manpower to troubleshoot, and as to how to avoid this problem no way and countermeasures.
Changshu da plastic products factory negotiate smoothly solve below extrusion mould permeability material problem!
when the extrusion line is running, the shape of the mouth of the simple mode may be kept clean. To pull the extrudate left mouth mold Angle change, will change the layout of permeability to appear on the mouth mould material shape, and make it easy to clean. Also can consciously die bite of transfer on the extrusion products, further away from the production equipment. Such as extrusion sheet processing, installation of mechanical automatic scraper, can avoid biting mode failure.
but, most of the factories have to interrupt the production line running normally, to exclude bite module fault, economically uneconomic. Mouth mold was removed after the surface coated with release agent in die or silicone, can reduce the bit mode of risk, extend the interval period of cleaning the die. May also decrease slightly reduce the production rate, the plates and but it will affect production. All the above solution, not the point. There is a better solution can make you know the cause of die bite of the cause.
bit mold phenomenon is related to the stress of the die size, resin flow within the die head relatively slowly, when the extrusion to die suddenly accelerated motion. This acceleration games to produce a kind of stress in the melt. Under the effect of stress, low molecular weight polymer components with other components within the melt separation, and accumulated in the die. The solution is to reduce the stress of the die, or reduce the tendency to melt in various components from each other. These solutions include changing process conditions, raw materials and die.
when the extrusion line is running, the shape of the mouth of the simple mode may be kept clean. To pull the extrudate left mouth mold Angle change, will change the layout of permeability to appear on the mouth mould material shape, and make it easy to clean. Also can consciously die bite of transfer on the extrusion products, further away from the production equipment. Such as extrusion sheet processing, installation of mechanical automatic scraper, can avoid biting mode failure.
but, most of the factories have to interrupt the production line running normally, to exclude bite module fault, economically uneconomic. Mouth mold was removed after the surface coated with release agent in die or silicone, can reduce the bit mode of risk, extend the interval period of cleaning the die. May also decrease slightly reduce the production rate, the plates and but it will affect production. All the above solution, not the point. There is a better solution can make you know the cause of die bite of the cause.
bit mold phenomenon is related to the stress of the die size, resin flow within the die head relatively slowly, when the extrusion to die suddenly accelerated motion. This acceleration games to produce a kind of stress in the melt. Under the effect of stress, low molecular weight polymer components with other components within the melt separation, and accumulated in the die. The solution is to reduce the stress of the die, or reduce the tendency to melt in various components from each other. These solutions include changing process conditions, raw materials and die.
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