Commonly used method introduces polish of surface of Injection Mold Tooling

Polish of machinery of 1 mechanical polish is plasticity of surface of * cutting, material be out of shape take out by the protruding after polishing ministry and the polishing means that gets flowing area, general use oilstone, abb annulus, sand paper, give priority to with manual operation, special spare parts is like swing tower surface, can use the auxiliary tool such as revolving stage, exterior quality requirement can be used high exceed essence of life to grind the method that cast. Exceed essence of life to grind casting is to use grind tailor-madely, grind in what contain abrasive in throwing liquid, press closely in workpiece to be machined apparently, make high speed whirligig. Use this technology to be able to achieve Ra0.

The exterior surface roughness of 008 μ M, it is all sorts of polishing methods in highest. Optical lens mould often uses this kind of method. 1.

2 chemistry cast actinic polish is to let material be in chemical medium the part with microcosmic and bulgy surface is sunkener the part is preferential and deliquescent, get flowing area thereby. The main good point of this kind of method is not to require sophisticated equipment, can the workpiece with polishing complex form, can polishing is very much at the same time workpiece, efficiency is tall. The core problem of chemical polish is polishing fluid make up. The exterior surface roughness that chemical polish gets is general amount to 10 μ M. 1.

3 electroanalysis polishing electroanalysises polishing fundamental and chemical polish are identical, namely the deliquescent material surface with alternative * is tiny and bulgy part, make the surface slick. Compare with chemical polish photograph, can remove the effect that cathode reacts, the effect is better. Cent of electrochemistry polish process is two paces: (1) macroscopical full smooth deliquescent production diffuses to the middle of electrolyte, material surface geometry is coarse drop, 1 μ of Ra ＞ M. (2) polarization of positive pole of crepuscular level off, exterior brightness rises, 1 μ of Ra ＜ M. 1.

4 ultrasonic polish puts work into fluid of abrasive in suspension and ultrasonic of a park in field, according to the oscillation action of * ultrasonic, make abrasive is in polish of workpiece surface grinding. Ultrasonic machines macroscopical force small, won't cause workpiece to be out of shape, but it is more difficult to tool is made and be installed. Ultrasonic treatment can be united in wedlock with chemistry or electrochemistry method. Corrode in solution, on electrolytic foundation, bring to bear on again solution of ultrasonic vibration agitate, make deliquescent child breaks away from workpiece surface, near the surface corrode or electrolyte is even; Ultrasonic still can be restrained in the cavitation action in the liquid corrupt a process, benefit is changed at exterior brightness 1.

Polish of fluid of 5 fluids polish is the liquid that flows according to * high speed reach what its carry to grind bead to erode the goal that workpiece surface achieves polishing. Commonly used method has: Motivation of abrasive eject treatment, liquid eject treatment, fluid is abrade wait. Fluid motivation is abrade be by hydraulic pressure drive, make carry the move back and forth of liquid medium high speed that wears bead to had shed workpiece surface. Medium basically uses the special compound with the gender passes good in inferior pressure indelicacy (polymer form substance) and the abrasive on mix into is made, abrasive can use carborundum powder. 1.

6 magnetism are abrade polishing magnetism is abrade polishing is to use magnetic abrasive to form abrasive to brush below magnetic field action, to workpiece grinding treatment. Efficiency of treatment of this kind of method is tall, quality is good, treatment condition is controlled easily, working requirement is good. Use appropriate abrasive, exterior surface roughness can achieve Ra0.

1 μ M. The exterior polish that asks in the polish that says in plastic mould treatment and other industry has very big different, strictly speaking, the polish of the mould should call lens face treatment. It has very high demand to polishing itself not only and flatness, smooth to the surface degree and geometrical accuracy also has very high level. The surface that exterior polish asks to obtain brightness only commonly can. The standard cent that lens face machines is 4 class: AO=Ra0.

008 μ M, a1=Ra0.

016 μ M, a3=Ra0.

032 μ M, a4=Ra0.

063 μ M, because electroanalysis,the method such as polishing, fluid polish controls the geometrical accuracy of the spare parts accurately very hard, and chemical polish, ultrasonic polish, magnetism is abrade the exterior quality of the method such as polishing short of requirement, so the lens face of exact pattern is machined or give priority to with mechanical polish. Mechanical polish is basic the polishing effect that the program wants to acquire high quality, the most important is the oilstone that should have stock high quality, sand paper and diamond abrade cream etc polishing tool and auxiliary article. And the choice of polishing program depends on the exterior state after early days is machined, if machining, electric spark is machined, grind treatment to wait a moment. The common procedure of mechanical polish is as follows: (1) thick cast it is classics mill, electric spark, OK to wear the face after waiting for craft choice rotate speed is in 35 000, the whirl of 40 000 Rpm exterior polisher or ultrasonic muller undertake polishing. Commonly used method has the electric spark of wheel purify white that uses diametical Φ 3mm, WA # 400 layer. It is manual oilstone next abrade, oil of strip oilstone coal serves as lubricant or refrigerant. Average use order is #180 ~ #240 ~ #320 ~ #400 ~ #600 ~ #800 ~ #1000. A lot of die manufacturer choose for spare time to begin from #400. (2) half essence casts half essence to cast main use sand paper and kerosene. The name number of sand paper is ordinal for: #400 ~ #600 ~ #800 ~ #1000 ~ #1200 ~ #1500. Actually #1500 sand paper is used only comfortable at the mould steel with hard temper by dipping in water (52HRC above) , and do not apply to beforehand hard steel, because may be brought about so beforehand hard steel exterior burn. (3) essence of life casts essence of life to cast main use diamond abrade cream. If with polishing cloth annulus mixes diamond abrade pink or abrade cream have abrade word, criterion normally abrade order is 9 μ M (#1800) M of ~ 6 μ (#3000) ~3 μ M (#8000) . The diamond of 9 μ M is abrade the hair shape that creams with polishing cloth annulus can use purify #1200 and #1500 size sand paper to stay grinds mark. Use then stick felt and diamond abrade cream undertake polishing, it is 1 μ M orderly (#14000) M of ~ 1/2 μ (#60000) ~1/4 μ M (#100000) . Precision asks to be in above of 1 μ M (include 1 μ M) polishing craft is in mould job shops a clean polish is indoor can undertake. If undertake more accurate polish,need an absolutely and clean space. Dirt, aerosol, dander and buccal foam discard as useless likely the face of tall nicety polish that after several hours work, gets. CNC Milling