an extrusion die

Abstract

The invention discloses an extrusion die. The extrusion die comprises a die drum and an extrusion rod. An extrusion channel is formed in the center of the die drum. A top end sealing part is arranged on the extrusion channel. An extrusion head is arranged in the center of the front end of the extrusion rod and is 25-35 mm long. The diameter of the extrusion head is 30%-50% of the diameter of the extrusion rod. Three to eight wire outlets and wire outlet channels which communicate with the corresponding wire outlets are evenly distributed in the circumferential direction of the extrusion rod, and the wire outlets and the wire outlet channels are concentric. The diameter of each wire outlet is 2.5-4.5 mm, and the length of each wire outlet is 0.5 time of the diameter of the wire outlet. The diameter of each wire outlet channel is 1.5 times that of the corresponding wire outlet. The top end sealing part comprises a cup joint part and a blocking part. The cup joint part is provided with a groove which is in a circular truncated cone shape. The diameter of the groove gradually decreases from the end face to the interior, the taper of the groove is 20-25 degrees, and the depth of the groove is 30-40 mm. A backward extrusion technology is adopted by the extrusion die to achieve the effect of forward extrusion of soft soldering material wire billets, and the advantage of backward extrusion is achieved.

Description

technical field [0001] The invention relates to the technical field of solder processing, in particular to an extrusion die. Background technique [0002] At present, the conventional soldering wire is manufactured using the forward extrusion process, that is, the extrusion method in which the direction of the metal flowing out of the die hole is the same as the direction in which the extrusion force is applied, see Fig. figure 1 . The process is as follows: the extruded billet and the mold reach a certain temperature, the extruded billet is coated with a small amount of lubricating oil and sent to the mold cylinder 111, and under the action of the extrusion rod 112, the extruded billet is filled in the mold cylinder 111 to form Material 114, the material 114 is slowly extruded from the extrusion port through the extrusion die 113 to form a wire blank 115, and then the wire is taken up by the wire take-up device; when the extrusion rod 112 is approaching the extrusion die 1...

AI Technical Summary

Problems solved by technology

However, at present, reverse extrusion is mainly used for the processing of non-ferrous metals such as copper and aluminum. One extrusion billet extrudes one wire billet. Therefore, the structure of the existing reverse extrusion technology die cannot achieve the extrusion of multiple extrusion ingots. Requirements for forming a wire billet, so it is not suitable for extrusion of solder

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