Hot runner flow dividing and side pouring method and mold

Abstract

The invention discloses a hot runner flow dividing and side pouring method and mold. The method comprises the steps of (1) arranging a pouring gate base plate, forming a pouring gate groove in the pouring gate base plate, and forming two or more flow dividing transition grooves or flow dividing ports in the edge of the pouring gate groove; 2) arranging a flow dividing cavity at the tail ends of the flow dividing transition grooves or the flow dividing ports, and communicating the tail end of the flow dividing cavity with a side pouring gate; and 3) communicating the side pouring gate with a molding cavity, and carrying out side pouring molding. By means of the hot runner side pouring method and the hot runner mold provided by the invention, the hot runner molding period can be greatly shortened, for example, the one-step molding of a glass bottle plastic cover can be reduced by about 2 seconds, and the yield can be increased by 15% or above. Meanwhile, due to the implementation of thehot runner side pouring gate, the structure of a multi-molding cavity hot runner is simplified, the product quality is more stable, the number of mold cavities can be increased, and the yield is increased. Due to the side pouring mode, there is no degraded material, the labor cost is reduced, materials are saved, the environment is protected, and considerable economic benefits are brought.

Description

technical field [0001] The invention relates to the field of plastic molding, in particular to a method and a mold for split flow and side casting of a hot runner. Background technique [0002] In recent years, the hot runner process has been widely used due to its advantages of simple mold structure, easy molding, and fast molding speed. The structure of the hot runner is complex, and traditional glue injection can only use point gates or submerged gates. For mold cavities With a large number of molds, it is difficult to realize automatic gate removal, the molding cycle is long, and the labor cost is high. At present, the side pouring method is widely used as a relatively easy way to realize automatic gate removal. However, due to the limitations of injection pressure and injection balance in the existing hot runner side pouring method, often only one or two injections can be made at one time. Therefore, there are defects such as long molding cycle and low production effic...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the hot runner process has been widely used due to its advantages of simple mold structure, easy molding, and fast molding speed. The structure of the hot runner is complex, and traditional glue injection can only use point gates or submerged gates. For mold cavities With a large number of moulds, it is difficult to realize automatic gate removal, the molding cycle is long, and the labor cost is high

At this stage, the side pouring method is widely used as a relatively easy way to realize automatic gate removal. However, due to the limitations of injection pressure and injection balance in the existing hot runner side pouring method, often only one or two injections can be made at one time. Therefore, there are defects such as long molding cycle and low production efficiency.

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