A powder injection molding process

Abstract

The invention relates to a powder injection molding process. The specific process is as follows: the first step, mixing materials: using an internal mixer, putting metal powder materials, wear-resistant metal elements, and organic adhesives into the internal mixer, and mixing them in a closed mixer. Under the environment, the temperature is controlled at 180 ° C, stirred, and produced into granules; the second step, injection molding: use a mold with a hole mold and a threaded mold, and use an injection machine to inject the granules into the injection port of the mold; the third step , degreasing and sintering: using a sintering furnace, put the semi-finished product processed in the second step into the sintering furnace for degreasing and sintering; the fourth step, quenching: use a vacuum furnace, put the semi-finished product processed in the third step into the vacuum furnace for quenching treatment, the fifth step The first step is cryogenic treatment: cryogenic treatment is carried out on the semi-finished product processed in the fourth step; the present invention lies in: using this production process to manufacture guide rails and sliders, reducing drilling and tapping processes, making the process simpler, more environmentally friendly, and shortening In order to shorten the production cycle, thereby improving the production speed.

Description

technical field [0001] The invention relates to a processing technology, in particular to a powder injection molding technology. Background technique [0002] The structure of the linear guide rail has two basic components, one as a guide is a fixed component (rail), and the other is a moving component (slider). The guide rail as a guide is hardened steel, which is placed on the installation plane after fine grinding. The geometry of the cross section is more complicated, because grooves need to be machined on the guide rail to facilitate the movement of the sliding assembly. The slider wraps the top and two sides of the guide rail. The linear guide uses rolling steel balls as the power transmission interface between the guide rail and the slider. , because the rolling steel ball is suitable for high-speed motion with small friction coefficient and high sensitivity, which meets the working requirements of the moving parts, and can perform infinite rolling cycle motion, and t...

AI Technical Summary

Problems solved by technology

[0005] First, the machining process, the specific process is as follows: metal material - drawing forming - perforation - wire cutting - drilling large holes (diameter 1, 1.4, 1.8, 2.4, etc.) - tapping (M1.4, M1.6, M2 , M3, etc.) - chamfering - deburring - quenching - fine grinding - finished product; the machining process has the following disadvantages: many production processes, long time consumption, large tool wear, due to many production processes, resulting in high material waste rate, The scrap rate of finished products is high, resulting in higher production costs;

[0006] Second, precision casting process: precision casting rough products - rough grinding - perforation - drilling large holes (diameters of 1, 1.4, 1.8, 2.4, etc.) - tapping (M1.4, M1.6, M2, M3, etc.) - Chamfering—deburring—quenching—fine grinding—finished product; the disadvantages of this precision casting machining process: the material process is not environmentally friendly, the material precision is poor, the processing process increases, and the tool consumption is large. Due to the many production processes, the material is easy to foam and crack. and other unqualified defects, resulting in a high scrap rate, resulting in a large waste of materials and a long production cycle