隨著高性能塑料的發展和不斷生產，塑料制品的種類日益增多，用途不斷擴大，制品向精細化、大型化、復雜化發展。下面山東塑料模具鋼廠家來講講塑料模具的鋼性能要求。

With the development and continuous production of high-performance plastics, the types of plastic products are increasing and their applications are expanding. The products are becoming more refined, larger and more complex. Next, Shandong plastic mold steel manufacturers will talk about the steel performance requirements of plastic molds.

1）型腔表面的磨損和腐蝕

1) Wear and corrosion of cavity surface

塑料熔體以一定的壓力在模腔內流動，凝固的塑件從模具中脫出，都對模具成型表面造成摩擦，引起磨損。造成塑料模具磨損失效的根本原因就是模具與物料間的摩擦。

The plastic melt flows in the mold cavity under a certain pressure, and the solidified plastic parts are pulled out of the mold, which will cause friction and wear on the molding surface of the mold. The fundamental cause of plastic mould wear failure is the friction between the mould and materials.

但磨損的具體形式和磨損過程則與許多因素有關，如模具在工作過程中的壓力、溫度、物料變形速度和潤滑狀況等。當塑料模具使用的材料與熱處理不合理時，塑料模具的型腔表面硬度低，耐磨性差，其表現為：

However, the specific form and process of wear are related to many factors, such as the pressure, temperature, material deformation speed and lubrication condition of the die in the working process. When the materials and heat treatment used in the plastic mold are unreasonable, the surface hardness of the cavity of the plastic mold is low and the wear resistance is poor, which is shown as follows:

型腔面因磨損及變形引起的尺寸超差；粗糙度值因拉毛而變高，表面質量惡化。尤其是當使用固態物料進入塑模型腔時，它會加劇型腔面的磨損。加之塑料加工時含有氯、氟等成分受熱分解出腐蝕性氣體HC1、HF，使塑料模具型腔面產生腐蝕磨損，導致失效。

The dimension of the cavity surface is out of tolerance due to wear and deformation; The roughness value becomes higher due to galling, and the surface quality deteriorates. Especially when solid materials are used to enter the mold cavity, it will aggravate the wear of the cavity surface. In addition, when plastic processing contains chlorine, fluorine and other components, which are decomposed into corrosive gases HC1 and HF by heating, so that the surface of the plastic mold cavity is corroded and worn, leading to failure.

如果在磨損的同時又有磨損損傷，使型腔表面的鍍層或其他防護層遭到破壞，則將促進腐蝕過程。兩種損傷交叉作用，加速了腐蝕一磨損失效。

If there is wear damage at the same time, the coating or other protective layer on the cavity surface will be damaged, which will promote the corrosion process. The cross action of the two kinds of damages accelerates the corrosion wear failure.

2）塑性變形失效

2) Plastic deformation failure

塑料模型腔表面受壓、受熱可引起塑性變形失效，尤其是當小模具在大噸位設備上工作時，更容易產生超負荷塑性變形。塑料模具所采用的材料強度與韌性不足，變形抗力低；塑性變形失效另一原因，主要是模具型腔表面的硬化層過薄，變形抗力不足或工作溫度高于回火溫度而發生相變軟化，而使模具早期失效。

The plastic deformation failure can be caused by the pressure and heat on the surface of the plastic mold cavity, especially when the small mold is working on the large tonnage equipment, it is more likely to produce overload plastic deformation. The strength and toughness of the materials used in the plastic mould are insufficient, and the deformation resistance is low; Another reason for plastic deformation failure is that the hardening layer on the surface of the mold cavity is too thin, the deformation resistance is insufficient, or the working temperature is higher than the tempering temperature, so that the transformation softening occurs, which makes the mold early failure.

3）斷裂

3) Fracture

斷裂的主要原因是由于結構、溫差而產生的結構應力、熱應力或因回火不足，在使用溫度下，使殘余奧氏體轉變成馬氏體，引起局部體積膨脹，在模具內部產生的組織應力所致。

The main reason for fracture is the structural stress and thermal stress caused by structure and temperature difference, or the insufficient tempering, which transforms the residual austenite into martensite at the service temperature, causing local volume expansion, and the organizational stress generated in the mold.

隨著制造業快速發展，塑料模具是塑料成型加工中不可缺少的工具，在總的模具產量中所占的比例逐年增加，您有相關需求就來我們網站http://m.6886774.cn咨詢了解吧！

With the rapid development of manufacturing industry, plastic mold is an indispensable tool in plastic molding processing, and its proportion in the total mold output is increasing year by year. Come to our website if you have relevant needs http://m.6886774.cn Ask and understand!