Demolding device and method for electroforming thin-wall metal fixing tube

Abstract

The invention discloses a demolding device and method for an electroforming thin-wall metal fixing tube, and belongs to the technical field of electro-chemical machining. The device mainly comprises a fixed hook, a master mold, a metal fixing tube, a suction pull head, a negative pressure generating unit, a supporting shaft and a base. Based on the device, firstly, the master mold with the metal fixing tube on the outer side surface is rotationally and detachably fixed on the base through the fixed hook and the supporting shaft; secondly, the negative pressure generating unit is started, and a handle is held by hand to tightly adsorb the suction pull head to the surface of the metal fixing tube; thirdly, the suction pull head is horizontally moved and the master mold is rotated until the adsorption point positions are completely distributed on the surface of the metal fixing tube; and finally, the metal fixing tube is pulled away from the master mold, demolding is completed, and the negative pressure generating unit is closed. The demolding device is simple, demolding is easy to achieve, the demolding effect is good, the efficiency is high, and the process cost is low.

Description

technical field [0001] The invention relates to the technical field of electrochemical processing, in particular to a demoulding device and method for electroforming thin-walled metal fixing tubes. Background technique [0002] The metal fuser tube is a thin-walled metal round tube, which is one of the important parts in a printer or copier. At present, stamping forming and electroforming are mainly used to prepare, among which the electroforming metal fixing tube is more popular because of its ultra-thin wall thickness, high material performance, high precision, smooth inner wall and many other advantages. However, when the metal fixing tube is prepared by the electroforming method, the electroformed layer tightly "encloses" the surface of the original mold without gaps, making it extremely difficult to remove the electroformed seamless metal fixing tube from the original mold during demoulding. [0003] Since the original mold is generally made of metal materials such as ...

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Problems solved by technology

However, when the metal fixing tube is prepared by electroforming, the electroforming layer tightly "encloses" the surface of the original mold without gaps, making it extremely difficult to remove the electroformed seamless metal fixing tube from the original mold during demoulding.

[0003] Since the original mold is generally made of metal materials such as stainless steel, the difference in thermal expansion coefficient between it and electroformed nickel (a common material for electroformed seamless metal pipes) is very small. The maximum demoulding gap between the layers can only reach a few microns, resulting in the impossibility of smooth demoulding

There are also other demoulding methods, such as the Japanese patents whose patent numbers are JP2006-213960 A and JP 2012-56644 A, by injecting high-pressure liquid and high-pressure gas between the original mold and the electroforming layer to perform demoulding. However, between the original mold and the electroforming layer Introducing high-pressure liquid and high-pressure gas between the metal fixing tubes can easily damage the structure of the fixing tube, or even damage the fixing tube, and it needs to rely on expensive auxiliary equipment to achieve high cost, complex demoulding operation and low efficiency

The patent with the application number 201911123699.5 discloses a demoulding method that fills the original mold with liquid and uses the thermal expansion and contraction of the liquid to realize the demoulding of the fixing film. The expansion coefficient of the liquid is relatively high, and the demoulding efficiency is low

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