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Production method of oversized-diameter anode phosphorus copper ball

A technology with super large diameter and production method, applied in metal processing equipment and other directions, can solve problems such as low energy consumption, achieve the effect of smooth surface, increase electroplating efficiency, and ensure stability

Inactive Publication Date: 2012-08-01
铜陵有色股份铜冠电工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention has the characteristics of high efficiency, low energy consumption and strong stability, improves the compactness of metal crystals, and has good promotion value, but it can only produce anode phosphor copper balls below Φ30 mm

Method used

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Embodiment Construction

[0019] The present invention will be further explained below by specific operation steps:

[0020] 1. The phosphor-bronze alloy rod is produced by upward continuous casting method.

[0021] The electrolytic copper is melted into copper liquid in the melting furnace, and then the copper liquid is sent into the holding furnace through the launder, and the phosphor-bronze intermediate alloy is added while the copper liquid flows through the launder, and finally the phosphor-bronze alloy rod is obtained by casting.

[0022] The copper liquid in the melting furnace and the phosphor-bronze master alloy are intermittently added to the holding furnace, and the amount of each addition of the phosphor-bronze master alloy is proportional to the amount of copper liquid added to the holding furnace each time, so that the copper in the phosphor-bronze alloy solution in the holding furnace The content of phosphorus is at least 99.9%, and the content of phosphorus is 0.035-0.065%.

[0023] T...

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Abstract

The invention belongs to the technical field of phosphorus copper balls for electroplating and particularly relates to a production method of an oversized-diameter anode phosphorus copper ball. The method comprises the following steps of: firstly melting pure copper and phosphorus copper intermediate alloy to obtain a phosphorus copper alloy solution and producing a phosphorus copper alloy rod by utilizing the uniformly mixed phosphorus copper alloy solution through an upward casting method; feeding the obtained phosphorus copper alloy rod into a continuous extruding machine for extrusion, wherein the phosphorus copper alloy rod is driven by an extrusion wheel to be forcedly pressed into an extrusion cavity and is extruded according to the designed size so as to obtain an ultra-fine grain phosphorus copper rod blank; and finally performing cold heading and molding on the obtained ultra-fine grain phosphorus copper rod blank by utilizing a cold header, so as to form phosphorus copper ball of design specification. The phosphorus copper ball obtained by utilizing the production method has a smooth, round and complete surface and a compact internal crystal structure, and has the advantage of obviously improved appearance and internal quality compared with the phosphorus copper ball obtained by utilizing an existing technology.

Description

technical field [0001] The invention belongs to the technical field of phosphor bronze balls used for electroplating, and in particular relates to a production method of super large-diameter anode phosphor bronze balls. Background technique [0002] Anode phosphorous ball is a copper-based binary alloy material containing phosphorus. It is widely used in printed circuit boards, hardware, decoration and other industrial fields with balls, particles or plates as electroplating anode materials. At present, most of the electroplating copper anodes in my country are spherical, with a diameter between 20 and 40 mm, while the leaders of the PCB industry - Japan and South Korea use spherical copper anodes with a diameter of about 55 mm. Due to the large number of leftovers during the electroplating of small balls, it is easy to form anode sludge, resulting in rough coating and turbid plating solution, which affects the current efficiency, performance of the plating solution and qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21C23/00B21J5/00C22C1/03C22C9/00
Inventor 刘婉容田军周本植刘纲刘宏陈俊
Owner 铜陵有色股份铜冠电工有限公司
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