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山東模具產品開裂的原因有哪些?

來源:http://www.436695.tw     發布時間:2019-07-12 10:01:10    點擊:

  裂紋可以理解為絲狀裂紋、微裂紋、頂部白色裂紋、裂紋和環形件粘模、流道鉆具模具等引起的缺陷。根據開裂時間、脫模開裂及應用情況
  Cracks can be understood as defects caused by filamentary cracks, microcracks, white cracks at the top, cracks and viscous dies of annular parts, and runner drill tools. According to cracking time, demoulding cracking and Application
  裂化(也稱為裂化)。前者發生在脫模過程中,后者發生在測試、儲存和應用中(微裂紋與溶劑蒸汽接觸等)。因素造成開裂
  Cracking (also known as cracking). The former occurs in the demoulding process, while the latter occurs in the testing, storage and application (microcracks in contact with solvent vapor, etc.). Cracking caused by factors
  如下。
  As follows.
  (1)模具
  (1) Mould
  1. 在制品的薄壁部位選擇了頂出位置,產品局部變形較大,產生應力增白或應力開裂現象。
  1. In the thin-walled part of the product, the ejection position is selected. The local deformation of the product is large, resulting in the phenomenon of stress whitening or stress cracking.
  2. 內應力是由噴射器的傾斜或不平衡產生的。
  2. The internal stress is caused by the inclination or imbalance of the ejector.
  山東模具
  Shandong Mould
  (2)技術
  (2) Technology
  1. 模具溫度過低或過高。模具溫度過低,塑料過早冷卻,熔接不良,易開裂。模具溫度過高,當負壓過大時,塑料不易凝固而出模具表面。
山東模具
  1. Mold temperature is too low or too high. Mold temperature is too low, plastic cooling too early, poor welding, easy to crack. Mold temperature is too high, when the negative pressure is too large, the plastic is not easy to solidify and come out of the surface of the mould.
  2. 注射壓力太高,速度太快。在壓力過大、速度過大的情況下,模具內填充的塑料過多,內應力過大。
  2. The injection pressure is too high and the injection speed is too fast. When the pressure is too high and the speed is too high, the plastic filled in the mould is too much and the internal stress is too large.
  3.壓力保持時間長。模具內零件冷卻時間過長,冷塑料粘在芯上,在噴射時產生負壓。
  3. Pressure is maintained for a long time. The cooling time of the parts in the die is too long, and the cold plastic sticks to the core, which produces negative pressure during injection.
  4. 嵌體與塑性收縮率不一致,導致開裂。
  4. Inlay and plastic shrinkage are inconsistent, leading to cracking.
  5. 模具開得太快。
  5. The mould is going too fast.
  山東模具
  Shandong Mould
  (3)原材料
  (3) Raw materials
  1. 潤滑劑不當、脫模劑或用量過大。
  1. improper lubricant, release agent or excessive dosage.
  2. 品牌、等級不適用。
  2. Brand and grade are not applicable.
  (4)產品設計
  (4) Product design
  產品設計不合理,導致局部應力集中或薄弱部位較多開裂
  Unreasonable product design leads to local stress concentration or more cracks in weak parts
  例如,設計太薄或太空心。
  For example, design is too thin or space heart.
  以上是山東模具小編為大家整理的相關內容,想要了解更多內容,歡迎訪問網站:http://www.436695.tw
  The above is the related content of Shandong Mould Editor. For more information, please visit the website: http://www.436695.tw.
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