Production method for precise elastic abrasive particles

Abstract

The invention provides a production method suitable for surface treatment, especially 3D surface treatment of elastic abrasive cylindrical particles of consumables with regular appearances, uniform particle sizes and precise sizes by means of conventional processing technologies such as sand blasting, projection, casting, vibration grinding and fluid dynamic grinding. Thermoplastic elastomers which can be easily heated and extruded for drawing are adopted and mixed with hard abrasive particles through an extruder to be extruded into single wires, and precise particle cutting is conducted to obtain the elastic abrasive cylindrical particles. The elastic abrasive particles are suitable for using normal temperature or low temperature sand blasting, projection, casting, vibration grinding andfluid dynamic grinding processes of compressed air, high pressure water or liquid nitrogen to conduct surface especially 3D surface treatment of deburring, deflashing, excessive glue, tool marks, wrinkles, electroplated layers, sedimentation layers, oxidation films, mirror polishing, tool passivation on various soft and hard material precise workpieces of rubber, plastics, wood, glass, ceramics, metal, sapphires, zirconium oxides, diamonds and hard alloys.

Description

technical field [0001] The invention belongs to the field of new materials, and relates to a production method of precision elastic abrasive particles. Specifically, the invention relates to sandblasting, projection, Projection, vibration grinding, and fluid dynamic grinding processes are used to remove burrs, burrs, overflow glue, tool marks, wrinkles, electroplating layers, deposition layers, oxide films, mirror polishing, and tool passivation on the surface of various soft and hard materials, especially 3D surfaces. The production method of precision elastic abrasive particle surface treatment consumables such as. Background technique [0002] Precision parts in modern industrial production, such as mobile phone computer watch casing, electronic component resin packaging, plastic rubber silicone precision parts, precision molds, glass sapphire 3D bending processing, printed circuit board PCB drilling, tool passivation and other processing processes It is required that th...

AI Technical Summary

Problems solved by technology

CN201410507956.0 describes an elastic abrasive that attaches hard abrasives to irregularly shaped elastic nuclei, and the abrasive grains are easy to fall off. Although it also describes the regenerative attachment method of abrasive grains, the disadvantage is that the amount of abrasive grains attached Unstable and difficult to adapt to the needs of automated continuous production. Adhesive nuclei tend to stick to each other and form agglomerates while adhering to the abrasive grains, blocking the sandblasting circuit and adhering to the workpiece, affecting the requirements of the automated process and increasing subsequent cleaning In addition, the fine abrasive particles falling off from the elastic nucleus during the sandblasting process will fly with the wind under the action of the pressure airflow, which not only has poor environmental protection, but also has a large loss of abrasive particles. The recovery and regeneration process of abrasive particles and nucleus The required analysis and measurement are not easy to be accurately controlled, and the proportion of hard abrasive grains contained in the elastic abrasive is unstable, thereby affecting the precise time control of the sandblasting process for the evaluation of the sandblasting effect, and the elastic abrasive requires special spraying. Sand machinery and its sandblasting process cannot adapt to the general equipment and technology in the market, and its adaptability is narrow. Consider the shape of the abrasive grains before and after regeneration, the change of cutting force, and the impact of new abrasives and regenerated abrasives on the workpiece during sandblasting. The effect of sandblasting is quite different, and it is not easy to separate the fine abrasive grains from the removed burrs and debris when recycling them. If they are regenerated together, it will easily cause inaccurate detection of the angle of repose and the effective abrasive grain content will be unstable. If they are discarded together with the abrasive grains, it will increase Cost; CN201280063096.5 describes elastic abrasives with self-adhesive polyrotaxane as the inner core and abrasive grains attached to the surface. The abrasive grain diameter is 0.10-1.20 microns, and the abrasive grain thickness is 1 / 4 of the core diameter. The numerical value is that the diameter of the abrasive should be 1.00-11.60 microns, which is also inconsistent with the particle size of the elastic abrasive described, and the other contents and problems described are basically consistent with CN201410507956.0; CN201711004408.6 proposes a thermoplastic elastic abrasive for polishing and its production The method is to use thermoplastics or elastomers as the carrier, mix high-content abrasive micropowder with it, banbury, granulate, and inject the abrasive into the desired shape. The shape, particle size and use of the abrasive are not specified, and the injection molding method is used The size of the manufactured abrasive is difficult to achieve the millimeter level, and it is also different from the precision elastic abrasive particles produced by the precision granulation method described in the present invention

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