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彩涂铝卷模头压力不足怎么办

返回列表 来源: 发布日期: 2020.11.13

彩涂铝卷模头压力不足怎么办

我相信你对彩涂铝卷很熟悉。例如,我们常见的波普罐是彩色涂层铝卷。随着铝材的广泛使用,越来越多的生产厂家上市,质量参差不齐。很多时候,厂家不做仔细的选择,他们会发现购买的花纹铝板卷会出现脆裂,这也说明选购很重要下来告诉大家如何解决彩涂铝卷脆裂的问题。

彩涂铝卷脆化的主要原因是一些厂家的生产工艺。如果生产工艺不合格,自然生产的花纹铝板卷容易发生脆化。具体原因主要集中在以下三个方面:
1、 模具截面设计不合理:内部补强和界面角的分布处理不当,会引起应力集中,导致铝脆曲。因此,设计和界面的直角和锐角都需要改进。
2、 模具压力不足:模具头部的压力直接取决于模具的压缩比,尤其是模具直线段的长度。如果模头压缩比过小或直线段太短,产品将不致密,影响图案化铝卷的物理性能。
3、彩涂铝卷 分流杆收敛性差:此时应适当增加肋与外表面的长度、肋与肋的合流或压缩比,以解决这一问题。模具压力的变化可以通过改变模头直线段的长度来调整。在模具设计阶段,可以选择不同的压缩比来改变挤出压力,但在合适的压缩比下,机头的压缩比应与挤出机螺杆的压缩比相一致,通过改变配方、调整挤出工艺参数和提高挤出机螺杆的压缩比来改变熔体压力多孔板。

I believe you are familiar with the color coated aluminum roll. For example, our common pop can is the color coated aluminum roll. With the wide use of aluminum materials, more and more manufacturers are on the market, and the quality is uneven. Many times, the manufacturers do not make a careful choice, they will find that the pattern aluminum coil purchased will appear brittle, which also shows that the selection is very important Come down to tell you how to solve the problem of brittle color coated aluminum roll.

The main reason of aluminum curl embrittlement is the production technology of some manufacturers. If the production technology is not up to standard, the naturally produced patterned aluminum coil is prone to embrittlement. The specific reasons are mainly concentrated in the following three aspects:
1、 The cross-section design of die is unreasonable: improper treatment of the distribution of internal reinforcement and interface angle will cause stress concentration, which will lead to brittle aluminum curl. Therefore, the design and the right angle and acute angle at the interface need to be improved.
2、 Insufficient die pressure: the pressure at the die head is directly determined by the compression ratio of the die, especially the length of the straight section of the die. If the compression ratio of die head is too small or the straight section is too short, the product will not be dense and affect the physical properties of the patterned aluminum coil.
3、 Poor convergence of splitter bars: in this case, the length of rib and outer surface, the confluence of rib and rib, or the compression ratio should be appropriately increased to solve the problem. The change of die pressure can be adjusted by changing the length of straight section of die head. Different compression ratio can be selected to change the extrusion pressure in the die design stage, but the compression ratio of die head should be consistent with that of extruder screw When the compression ratio is suitable, the melt pressure can be changed by changing the formula, adjusting the extrusion process parameters and increasing the porous plate.

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