How to ensure that plastic Coat Hanger do not deform during long-term use, and what key measures are taken in the production process?

Plastic Coat Hanger choose plastic raw materials with high strength, high toughness, and aging resistance, such as polypropylene (PP), polyethylene (PE), etc. These plastics have good mechanical properties and chemical stability, can withstand greater forces and harsh use environments, and reduce the deformation of Coat Hanger. For example, the use of high-fluidity polypropylene materials can improve the filling performance of plastics, make the wall thickness of Coat Hanger more uniform, and have higher strength.

In order to further improve the strength and rigidity of Coat Hanger, reinforcing materials such as glass fiber and carbon fiber can be added to plastic raw materials. These reinforcing materials can form composite materials with plastic matrices and significantly improve the mechanical properties of Coat Hanger. For example, after adding 10% - 30% of glass fiber, the tensile strength and bending strength of Coat Hanger can be increased by more than 50%.

Injection pressure and speed have a great influence on the filling and molding of plastics in molds. Appropriate injection pressure and speed can make the plastic fully fill the mold cavity and avoid defects such as short shots and shrinkage holes. At the same time, reasonable injection pressure and speed can also reduce the internal stress of plastic during the flow process and reduce the risk of deformation of Coat Hanger. For example, according to the size and shape of the hanger, adjust the injection pressure between 50-150MPa and the injection speed between 50-200mm/s.

Mold temperature and melt temperature have an impact on the crystallinity and shrinkage of plastic. Appropriate mold temperature and melt temperature can make the plastic fully crystallize in the mold, reduce shrinkage, and improve the dimensional stability of the hanger. For example, control the mold temperature between 40-80℃ and the melt temperature between 200-260℃. The specific temperature is adjusted according to the type and performance of the plastic raw material.

Holding time and cooling time have an important influence on the density and dimensional stability of the hanger. Sufficient holding time can further compact the plastic in the mold and reduce shrinkage and deformation. Appropriate cooling time can make the plastic fully cool and solidify, and improve the strength and hardness of the hanger. For example, according to the wall thickness and size of the hanger, the holding time is set between 5-20s and the cooling time is set between 10-60s.

During the injection molding production process, each process parameter is monitored in real time to ensure the stability and consistency of the process parameters. Through online detection equipment, such as pressure sensors, temperature sensors, etc., timely feedback on the changes in process parameters is provided for timely adjustment.

Strict finished product inspection is carried out on the produced Coat Hanger, including size inspection, appearance inspection, performance inspection, etc. For unqualified products, timely rework or scrapping is carried out to ensure that the quality of the Coat Hanger shipped from the factory meets the standard requirements. For example, a three-coordinate measuring instrument is used to accurately measure the size of the hanger, and a tensile testing machine is used to test the strength of the hanger.