A die-casting mold for button die-casting parts and the application of air-permeable steel on the die-casting mold

Abstract

The invention relates to a button pressure casting die-casting die and application of ventilation steel to a die-casting die. A moving die comprise a lower die plate, a sizing block, a moving die base plate, a moving die plate, a guide sleeve and a moving die cavity; a fixed die comprises an upper die plate, a fixed die plate, a guide pillar and a fixed die cavity; the upper die plate is provided with a locating ring, a sprue bush and a sprue bushing; the lower die plate is provided with a connector; a lower push rod plate and an upper push rod plate are arranged in the sizing block; an ejection cushion block, a push rod and a reset rod are arranged in the lower push rod plate and the upper push rod plate; a cushion nail and a clamping plate are arranged between the lower push rod plate and the lower die plate; a ventilation steel inserting piece and a spure spreader are arranged in the fixed die cavity and the moving die cavity; ventilation holes are formed in the moving die plate and the fixed die plate at the tail of the ventilation steel inserting piece; a sliding block, a pressing plate and a core-loosing core are arranged between the fixed die cavity and the moving die cavity, a diagonal draw bar and a locking block are arranged on the fixed die plate, and the sizing block, the moving die base plate and the moving die plate are fastened and connected through screws. According to the application of PM35 ventilation steel on the button pressure casting die-casting die, the purposes of improving the product quality and improving the production efficiency are achieved.

Description

technical field [0001] The invention belongs to the technical field of mold manufacturing, and in particular relates to a button die-casting die-casting die and the application of air-permeable steel on the die-casting die. Background technique [0002] PM35 breathable steel is a high-quality powder metallurgy stainless sintered steel developed by Japan Shinto Company. It has breathable function, excellent rust and acid resistance, and is easy to cut and discharge machining. Its interior is composed of tiny small holes connected to each other, so that air or any gas can penetrate and pass through smoothly. According to its pore size, it is divided into PM35-7, PM35-25, PM35-35 and other models. At present, there is no report on the use of die-casting molds in China. However, according to data feedback, the application of this steel type to plastic molds is relatively mature, such as "An Injection Mold Core with Suction and Exhaust and Rapid Cooling Functional Structure" dis...

AI Technical Summary

Problems solved by technology

Since this surface is the appearance surface, it was found during polishing before electroplating that the parting line was difficult to throw away due to the small shape of the part, and the polishing quality was unstable, and the production efficiency was not high. After the mold was used for a period of time, the parting line More obvious, the requirements for polishing are more stringent, which cannot meet the requirements of mass production of auto parts

[0004] In order to solve the above problems, structural changes must be made to the above molds, that is, according to Image 6 The parting method can completely avoid the parting line on the appearance surface of the electroplating, but because it is a closed space, the metal flow will generate high temperature and high pressure gas on the A side. If it is not discharged in time, it will form a suffocation phenomenon, resulting in a Die-casting defects such as insufficient pressure and patterns will produce defects such as under-casting and surface bubbles, which will affect the surface quality of the electroplating appearance surface

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