Extrusion molding of plastic profile manufacturers
Plastic profile extrusion molding planning considerations. In the planning of extrusion molding of plastic profile, special attention should be paid to the uniformity of wall thickness, fillet and stiffener. If there is any omission, it will lead to irreparable defects. Li, chief engineer of the plastic molding Research Institute of Tsinghua University, also pointed out that the planning of plastic products is very different with different cooling and setting methods. Let's take a look at the three common plastic profile extrusion molding shape requirements
1) uniformity of wall thickness. In the same product, if the thickness difference of each part is too large, it will lead to uneven shortening, uneven distribution of internal stress and severe deformation of the product.
2) arc transition at acute angle. The profile is similar to the shape of angle steel, channel steel and I-shaped steel. At the right angle of the profile, there must be a transition of the arc with a certain large and small radius, otherwise it will lead to stress convergence, and the products often crack in the process of application.
3) the thickness of profile. The thickness of plastic products is bound, otherwise, the internal stress in the molding process is enough to make the products crack. As the thickness of profile is too large, whether it can be formed smoothly is still a problem; even if the profile is formed, how much internal stress of the product is, which is a problem of great concern. Under the condition that the user agrees, these products can be changed into reasonable shapes. In this way, it can not only ensure the smooth molding, but also ensure that the internal stress of the products will not be very large.
Source: plastic profile manufacturer www.zhongshanlida.cn
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12-17
Extrusion molding of plastic profile manufacturers
Plastic profile extrusion molding planning considerations. In the planning of extrusion molding of plastic profile, special attention should be paid to the uniformity of wall thickness, fillet and stiffener. If there is any omission, it will lead to irreparable defects. Li, chief engineer of the plastic molding Research Institute of Tsinghua University, also pointed out that the planning of plastic products is very different with different cooling and setting methods. Let's take a look at the th
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12-17
Influence of technical commonness on PVC profile manufacturers
The coextrusion of PVC profiles and multicolored surface layers is one of the most popular coloration methods for PVC profiles in China. From 2002 to now, the development trend of producing colorful profiles by CO extrusion is rapid, accounting for about 40% of the sales market of colorful profiles, and it is estimated to reach 80% in 2020. By using coextrusion technology, the milky white PVC profile can be colored, and the aging resistance, temperature resistance and impact resistance of the PV
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12-17
Coloring problems of PVC profile manufacturers
Therefore, in terms of PVC coloring, fully consider the characteristics of commonly used resins and related modifiers, and blend the characteristics of color paste. In the selection of additives, we should pay attention to the following three problems: 1. Production and processing reliability, some ingredients in additives will promote the dissolution of resin. For example, iron ion and zinc ion are metal catalysts for PVC resin dissolution. Therefore, the use of compound (red, yellow, brown and
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12-17
Analysis on the defects of PVC profile manufacturer's production process
PVC profiles are widely used and bring convenience to our life. Generally, when we choose PVC profile, we will go to the regular business to buy, this posture quality is more guaranteed. We should read the operation manual carefully before using PVC profile, so that there will be no problem in the application process, which will affect our work. Some time, due to our improper use of methods will form PVC profile can not be used normally, then what should we do? 1. Surface tarnish: causes: poor p