Micro-foamed plastic automobile door panel with Persian column

Abstract

The invention provides a micro-foamed plastic automobile door panel with a Persian column, which is characterized by comprising an automobile door panel body formed by micro-foamed plastic injection molding, a fixed column is arranged below the automobile door panel body, a reinforced piece is arranged on the outer wall of the fixed column, and a fixing hole is formed in the fixed column. The thickness T of the automobile door panel body is 2.5-3mm, the thickness T1 from the bottom of the fixing hole in the fixed column to the upper end face of the automobile door panel body is equal to (0.75-0.9)T, the wall thickness T2 of the fixed column is equal to (0.75-0.9)T, and the thickness T3 of the reinforced piece is equal to 0.8T2.

Description

technical field [0001] The invention relates to an automobile door panel, in particular to a micro-foamed plastic automobile door panel with Persian columns. Background technique [0002] In the injection mold, in order to prevent the injection molded plastic parts from shrinking, resulting in sink marks on the surface of the plastic parts, the wall thickness of the plastic parts is usually made thinner to reduce the sink marks, and in some fields (such as automobiles) Decorative parts) The customer requires that the wall thickness of the plastic part must be greater than 2.5 or 3mm, so people invented the foam injection mold, that is, injecting nitrogen or carbon dioxide into the rubber mixed in the barrel to make the rubber foam, after foaming Even if the wall thickness of the plastic part is greater than 3mm, it will not shrink. However, for some plastic parts (such as car door panels with Persian columns), the existing technology usually makes the car door panels with a ...

AI Technical Summary

Problems solved by technology

[0002] In the injection mold, in order to prevent the injection molded plastic parts from shrinking, resulting in sink marks on the surface of the plastic parts, the wall thickness of the plastic parts is usually made thinner to reduce the sink marks, and in some fields (such as automobiles) Decorative parts) The customer requires that the wall thickness of the plastic part must be greater than 2.5 or 3mm, so people invented the foam injection mold, that is, injecting nitrogen or carbon dioxide into the rubber mixed in the barrel to make the rubber foam, after foaming Even if the wall thickness of the plastic part is greater than 3mm, it will not shrink. However, for some plastic parts (such as car door panels with Persian columns), the existing technology usually makes the car door panels with a wall thickness T of 2.5- 3mm, and the wall thickness from the bottom of the fixing hole in the fixing column to the surface of the car door panel is T1≥T. If T1 is too thick, the surface of the car door panel corresponding to the fixing hole is prone to swelling and bulging after foam molding of the plastic part, while the wall of the fixing column Thickness T2=0.6T, the fixed column is thinner and longer, and the flow of the foamed rubber material is shorter. If the mold cavity is deep, the foamed rubber material cannot fill the entire mold cavity during injection molding. Therefore, the existing technology only The length of the fixing column can be shortened. In addition, the thickness of the reinforcement sheet on the outer wall of the fixing column of the automobile door panel is T3=1 / 3 of T2 or T3=1 / 2 of T2, so that the upper surface of the injection-molded automobile door panel corresponds to the reinforcement sheet The position produces a cross-shaped dent, which seriously affects the shape and performance of the product

Images