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注塑模型的温度操控与热平衡

来源:http://www.sdlqmj.com 日期:2018-11-27 发布人:admin 浏览次数:
注塑模型的温度操控与热平衡
Temperature Control and Thermal Balance of Injection Molding Model
1.注塑模具的热平衡操控注塑机和模具的热传导是注塑件的要害。模具内部,由塑料(如热塑性塑料)带来的热量通过热辐射传递给资料和模具的钢材,通过对流传递给导热流体。别的,热量通过热辐射被传递到大气和模架。被导热流体吸收的热量由模温机来带走。模具的热平衡可以被描述为:P=Pm-Ps。式中P为模温机带走的热量;Pm为塑料引入的热量;Ps为模具散发到大气的热量。
1. Thermal balance control of injection moulds and heat conduction of injection moulds is the key of injection moulding parts. Inside the die, heat from plastics (such as thermoplastics) is transferred to the material and steel of the die by thermal radiation, and to the heat conducting fluid by convection. In addition, heat is transferred to the atmosphere and the die base through thermal radiation. The heat absorbed by the heated fluid is taken away by the thermostat. The thermal balance of the die can be described as P=Pm-Ps. In the model, P is the heat carried away by the mould temperature machine; Pm is the heat introduced by the plastic; Ps is the heat emitted from the mould to the atmosphere.
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2.有效操控模具温度的预备条件温度操控体系由模具.模温机.导热流体三部分组成。为了确保热量能加给模具或移走,体系各部分满意以下条件:首先是在模具内部,冷却通道的表面积足够大,流道直径要匹配泵的才能(泵的压力)。型腔中的温度分布对零件变形和内涵压力有很大的影响。合理设置冷却通道可以下降内涵压力,然后提高了注塑件的质量。它还可以缩短循环时间,下降产品成本。其次是模温机**可以使导热流体的温度恒定在1℃-3℃的范围内,详细根据注塑件质量要求来定。第三是导热流体**具有杰出的热传导才能,*重要的是,它要能在短时间内导入或导出大量的热量。从热力学的角度来看,水明显比油好。
2. Preparatory Conditions for Effective Temperature Control of Mould Temperature Control System consists of three parts: Mould, Temperature Machine and Thermal Conducting Fluid. In order to ensure that heat can be added to or removed from the die, the parts of the system are satisfied with the following conditions: first, in the die, the surface area of the cooling passage is large enough, and the diameter of the passage must match the pump's ability (pump pressure). Temperature distribution in the cavity has a great influence on the deformation and internal pressure of the parts. Rational setting of cooling passage can reduce the connotation pressure, and then improve the quality of injection parts. It can also shorten cycle time and reduce product costs. Secondly, the mould temperature machine can keep the temperature of the heat conducting fluid in the range of 1 3 C, which is determined in detail according to the quality requirements of the injection parts. Thirdly, the heat conducting fluid ** has outstanding heat conduction ability. It is important that it can import or export a large amount of heat in a short time. From the thermodynamic point of view, water is obviously better than oil.
综上所述有济南立强模具有限公司提供,想了解更多山东模具制造厂家知识,欢迎关注我们的网站:http://www.sdlqmj.com谢谢支持!
In summary, all the above-mentioned Jinan Liqiang Mould Co., Ltd. provides, want to know more about Shandong mould manufacturers, welcome to pay attention to our website: http://www.sdlqmj.com, thank you for your support!

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