Hard alloy lettering die

Abstract

The invention discloses a hard alloy lettering die which comprises a tungsten steel block, characters are engraved on one side of the top of the tungsten steel block, the tungsten steel block is made of tungsten-cobalt hard alloy, and the shape of the tungsten steel block is a trapezoid with the bottom included angle of 80 degrees. And thirty or more identification characters required by the matrix can be engraved at a time, the production procedures are few, the finished matrix can be produced only through two procedures, meanwhile, the rejection rate is avoided, scrapped matrixes cannot be generated, tungsten steel blocks can be repeatedly utilized, and the production cost is reduced. For example, tungsten steel blocks used by customers can be recycled and re-processed by a spark machine to obtain new character identifiers, so that resources are saved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of alloy lettering mold making, in particular to a hard alloy lettering mold. Background technique [0002] The semi-finished product of the existing type mold is formed by pressing the alloy powder with an abrasive tool. Since the mold has a concave mark and a hyphen, the lack of pressure on the tip of the word during pressing causes the alloy powder to not be compact, and the hardness and toughness of the semi-finished product after sintering cannot reach the due standard. Difficulty in mold making. Before powder pressing, it is necessary to engrave character logos on the mold with a precision engraving machine. The mold has a certain hardness, and the tool is easy to crack during engraving. The engraving time is long, the efficiency is low, the success rate of pressing semi-finished products is low, and it is difficult to demold during pressing. The tip of the word sticks to the mold and is not easy to de...

AI Technical Summary

Problems solved by technology

[0002] The semi-finished products of the existing fonts are formed by pressing alloy powders with abrasive tools. Since the molds have recessed markings and characters, the pressure on the tip of the characters is insufficient during pressing, resulting in loose alloy powders. After sintering, the hardness and toughness of the semi-finished products cannot meet the required standards. It is difficult to make molds. Before powder pressing, it is necessary to engrave the character logo on the mold with a precision engraving machine. The mold has a certain hardness. The tool is easy to crack when engraving, the engraving time is long, the efficiency is low, the success rate of pressing semi-finished products is low, and it is difficult to demould during pressing. The part of the letter tip sticks to the mold and is not easy to demould, resulting in a high scrap rate, difficulty in storing cemented carbide powder, and easy oxidation. Due to production needs, a large amount of cemented carbide powder needs to be ordered at one time. During storage, the binder in the cemented carbide powder It will oxidize and fail, resulting in difficulty in powder molding and low automation. After pressing, manual deburring is required, which is laborious and laborious. The font is easily deformed during sintering, and the sintering time is long. After pressing, high-temperature sintering is required. Adhesive, there will be small gaps in the font, and improper temperature control will easily cause the center of the font to sag, making the font scrapped, and sintering takes 36 hours, which is difficult to meet customer customization needs

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