Hot semi mold processing

　　Hot half mold processing is a commonly used method in injection molding,which accelerates the cooling rate of plastic by heating the half mold,improves production efficiency and product quality.The following will provide a detailed introduction to the steps and characteristics of hot semi mold processing.

　　1.Steps:

　　Hot semi mold processing usually includes the following steps:

　　-Heating:Firstly,the hot half of the mold needs to be heated to a certain temperature,usually using an electric heating rod or hot runner system to provide heating function.The heating temperature is set according to the characteristics and requirements of the injection molding material.

　　-Empty material injection:After the heating of the hot half mold is completed,empty material injection is required.This can eliminate plastic materials from the hot half mold,ensuring that the plastic processed during formal injection is fresh.

　　-Injection molding:After completing the empty material injection,the hot and cold half molds close,and the injection molding process begins.Plastic enters the mold cavity through a nozzle,quickly filling the entire mold cavity and making contact with the hot half mold.

　　-End of injection:After the injection molding is completed,the cold half mold opens and the product is demolded from the mold.During this process,due to the heating effect of the hot half mold,the cooling speed of the plastic is faster,resulting in a shorter demolding time.

　　2.Features:

　　Hot semi mold processing has the following characteristics:

　　-Improving production efficiency:By accelerating the cooling rate of plastics,hot semi mold processing can shorten the injection molding cycle and improve production efficiency.Especially for thick walled or large-sized products,hot semi mold processing can effectively reduce cooling time.

　　-Improving product quality:Heating the half mold can increase the cooling rate of plastic and reduce product deformation and shrinkage.At the same time,it can also provide better surface quality and reduce warping and defects.

　　-Simplified process:Compared to other cold half mold processing methods,hot half mold processing does not require the use of cooling water,reducing the design and operation costs of the cooling system,making the process more simplified.

　　-Strong adjustability:By adjusting the temperature of the heated half mold,the injection temperature and cooling rate can be accurately controlled to meet the requirements of different injection materials and products.

　　It should be noted that there are also some limitations in hot semi mold processing.Firstly,the heating of hot semi molds requires a certain amount of energy consumption,and the investment cost of heating equipment and systems is relatively high.In addition,for heat sensitive injection molding materials,hot semi mold processing may cause some problems,such as bubbles and thermal decomposition.

　　In short,hot semi mold processing is an important method to improve injection molding production efficiency and product quality.It accelerates the cooling rate of plastic by heating the half mold,shortens the injection cycle,and reduces product deformation and defects,which has broad application prospects.