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塑料托盘亮度不足的原因分析

来源:https://www.gtmfpack.com 发布时间:2020-03-17

  一、注塑模具
  1、 Injection mold
  1如果模具型腔加工不好,如疤痕、微孔、磨损、粗糙等,必然会对塑料托盘、塑料托盘光泽不是很好,仔细处理模具,所以腔表面粗糙度很小,托盘厂家在必要的时候,可以抛光镀铬。
  If the mold cavity processing is not good, such as scars, micropores, wear, roughness, etc., the luster of plastic tray and plastic tray will not be very good. Carefully handle the mold, so the surface roughness of the cavity is very small. The tray manufacturer can polish and chrome when necessary.
  2. 如果型腔表面有油渍、水渍,或脱模剂过多,会使塑料托盘表面变暗、无光泽,对此,要及时油渍、水渍,并限制脱模剂的使用。
  2. If there is oil stain or water stain on the surface of mold cavity, or too much release agent, the surface of plastic tray will be dark and lusterless. For this, oil stain and water stain shall be removed in time and the use of release agent shall be limited.
  3.如果塑件的分型角度太小,分型困难,或者分型力太大,塑件的表面不好,要增加分型角度。
  3. If the parting angle of the plastic part is too small, the parting is difficult, or the parting force is too large, and the surface of the plastic part is not good, the parting angle shall be increased.
  4. 如果模具排气不佳,过多的气体滞留在模具内,导致模具光泽不佳,为此,对模具排气系统进行检查和修改。
  4. If the mold exhaust is poor and too much gas is stuck in the mold, resulting in poor luster of the mold, check and modify the mold exhaust system.
  5. 如果大门的横截面积或跑步太小或突然变化,熔体受到太多的流动时剪切力,显示的动态流动,导致可怜的光泽,这大门的横截面积和跑步者应适当增加。
  5. If the cross-sectional area of the gate or the running is too small or changes suddenly, the melt is subject to too much shearing force when flowing, indicating the dynamic flow, resulting in poor luster, the cross-sectional area of the gate and the runner should be increased appropriately.
托盘厂家
  二、注塑工艺
  2、 Injection molding process
  1. 如果注塑速度过小,塑件表面不致密,光泽不佳,可适当提高注塑速度。
  1. If the injection speed is too small, the surface of the plastic part is not dense and the gloss is not good, the injection speed can be increased appropriately.
  2. 对于厚壁塑料件,如果冷冻不够,表面会有毛,光泽会变暗,因此需要改进冷冻系统。
  2. For thick wall plastic parts, if the refrigeration is not enough, the surface will be hairy and the luster will be dark, so the refrigeration system needs to be improved.
  3.保温压力不足,保温时间过短,塑密度不够,光泽不好。为此,应增加保压和保压时间。
  3. Insufficient heat preservation pressure, too short heat preservation time, insufficient plastic density and poor gloss. Therefore, it is necessary to increase the pressure holding time.
  4. 如果熔体温度过低,使流动性差,容易导致光泽不良,为此,应适当提高熔体温度。
  4. If the melt temperature is too low, the fluidity will be poor and the gloss will be poor. Therefore, the melt temperature should be increased properly.
  5. 对于结晶树脂制成的塑料零件,如PE、PP、POM等,不均匀的冷冻会导致光泽变差,因此需要改进冷冻系统,使其冷却均匀。
  5. For plastic parts made of crystalline resin, such as PE, PP, POM, etc., uneven freezing will lead to poor luster, so it is necessary to improve the freezing system to make it cool evenly.
  6. 如果注射速度过高,浇口的横截面积过小,则浇口附近颜色较暗,光泽较差。为此,可以适当降低注射速度,增加浇口的横截面积。
  6. If the injection speed is too high and the cross-sectional area of the gate is too small, the color near the gate is darker and the luster is poor. Therefore, the injection speed can be reduced and the cross-sectional area of the gate can be increased.
  三、原材料
  3、 Raw materials
  1. 原料粒度差异大,塑化均匀困难,光泽差。为此,需要对原材料进行筛选。
  1. The raw material has large particle size difference, difficult to plasticize uniformly and poor luster. Therefore, raw materials need to be screened.
  2. 原料中添加太多的原料或喷嘴材料,影响熔体的均匀塑化,导致光泽不良。为此,应减少再原料或喷嘴材料的添加量。
  2. Too many raw materials or nozzle materials are added to the raw materials, which will affect the uniform plasticization of the melt, resulting in poor luster. Therefore, it is necessary to reduce the amount of re raw materials or nozzle materials.
  3.有些原料在调温时会分解变色,导致光泽变差。因此,应选择耐高温的原材料。
  3. Some raw materials will decompose and change color when temperature is adjusted, resulting in poor luster. Therefore, high temperature resistant raw materials should be selected.
  4. 原料中水或挥发性物质含量过高,加热时挥发成气体,在模腔内冷凝熔化,导致塑料件光泽不良。为此,原材料应预先干燥。
  4. The content of water or volatile substances in raw materials is too high, which volatilizes into gas when heated, condenses and melts in the mold cavity, resulting in poor luster of plastic parts. For this reason, the raw materials should be dried in advance.
  5. 有些添加剂分散性太差,使塑料托盘的光泽很差,在这方面,应将添加剂转化为更好的流动性能。
  5. Some additives have poor dispersion, which makes the luster of plastic tray very poor. In this regard, additives should be converted into better flow performance.
  6. 原料中如有异物、杂质或不溶性物质混入,不能与原料均匀混合融合,造成光泽不良,应事先严格排除这些杂质。
  6. If there are foreign matters, impurities or insoluble substances mixed in the raw materials, they cannot be mixed and fused evenly with the raw materials, resulting in poor luster, these impurities shall be strictly excluded in advance.
  7. 如润滑油用量过少,熔体流动性差,塑件表面不致密,使其光泽不好,为此,润滑油用量应适当增加。
  7. If the amount of lubricating oil is too small, the melt fluidity is poor, and the surface of the plastic part is not dense, so that its luster is not good, therefore, the amount of lubricating oil should be increased appropriately.
  8. 根据模具的抛光程度是否符合要求,如果模具本身没有问题,确定ABS的特性,可以选择模具温度高、速度快、压力大;使用冷冻水也可以达到光滑的效果。
  8. According to whether the polishing degree of the mold meets the requirements, if there is no problem with the mold itself, determine the characteristics of ABS, you can choose the mold with high temperature, fast speed and high pressure; using chilled water can also achieve smooth effect.
  以上是托盘厂家为大家介绍的相关内容,想要了解更多内容,欢迎访问网站:http://www.gtmfpack.comThe above is the relevant content introduced by the tray manufacturer. To learn more, please visit the website: http://www.gtmfpack.com

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