The mold polishing process is generally used in plastic molds and die-casting molds. The general process is to use a thin guillotine knife to polish the surface, then use the coarse stone to polish the trowel, and polish the ridges. Then, fine oil stone is used to grind off the rough oil and oil, and then fine metallographic sandpaper is used to polish the fine oil and oil.
With the development of technology, now with the ultrasonic polishing machine, the efficiency has also improved, and the finish has also improved.
The polishing mentioned in the plastic mold processing is quite different from the surface polishing required in other industries. Strictly speaking, the polishing of the mold should be called mirror processing. It not only has high demands on the polishing itself but also has a high standard for surface smoothness, smoothness, and geometric accuracy. Surface polishing generally requires only a shiny surface. The standard for mirror processing is divided into four levels:
It is difficult to accurately control the geometric accuracy of parts due to electrolytic polishing, fluid polishing, etc., and the surface quality of chemical polishing, ultrasonic polishing, magnetic polishing, polishing, etc., fails to meet the requirements. Therefore, the mirror processing of precision molds is mainly based on mechanical polishing. .
First, semi-precision throwing mainly uses sandpaper and kerosene. The number of sandpaper is: #400-#600-#800-#1000-#1200-#1500. In fact #1500 sandpaper is only suitable for hardened die steel (above 52HRC), not for pre-hardened steel, because it may cause surface burn of pre-hardened steel.
Second, fine throwing mainly makes diamond abrasive paste. If the usual grinding sequence is 9um(#1800)-6um(#3000)-um(8000). 9um diamond abrasive and polishing cloth wheels can be used to remove the hair-like grinding marks left by #1200 and #1500 sandpaper. It was then polished with a sticky felt and a diamond paste in the order of 1 um (#14000)-1/2 um (60000)-1/4 um (#100000). The polishing process with an accuracy of 1um or more (including No. 1um) requires an absolutely clean space for the polishing of the mold. Dust, smog, dandruff and saliva foam can all be scrapped off for high-precision polished surfaces after hours of work.
Third, the basic process of mechanical polishing, in order to obtain high-quality polishing effect, the most important thing is to have high-quality polishing tools and auxiliary products such as whetstone, sandpaper and abrasive paste. The most important is the polished working environment. The requirement is a dust-free workshop. Zhongshan Fahrenheit Special Steel stated that the choice of the polishing process depends on the surface conditions of the previous processing, such as machining, EDM, grinding, and so on.
Fourth, the general process of mechanical polishing is as follows: First, the surface after rough polishing, fine milling, EDM, grinding, etc., can be selected for polishing with rotating surface polishing machine or ultrasonic grinder rotating at 35000-40000 rpm. The common method is to use a 3mm diameter, WA#400 wheel to remove the white EDM layer. This is followed by manual whetstone grinding, strips of corundum whetstone and kerosene as lubricants or coolants. The general use order is #180-#240-#400-#600-#1000. Many mold makers choose to start with #400 in order to save time.
This article is edited by Zhongshan Huashi Fushun Special Steel Technology Department. Please call for more details.
Contact: Mr. Chen 18988586811
Service Hotline
Address: Road 105, Pingdong Industrial Zone, Sanxiang Town, Zhongshan City, Guangdong Province
With the development of technology, now with the ultrasonic polishing machine, the efficiency has also improved, and the finish has also improved.
The polishing mentioned in the plastic mold processing is quite different from the surface polishing required in other industries. Strictly speaking, the polishing of the mold should be called mirror processing. It not only has high demands on the polishing itself but also has a high standard for surface smoothness, smoothness, and geometric accuracy. Surface polishing generally requires only a shiny surface. The standard for mirror processing is divided into four levels:
It is difficult to accurately control the geometric accuracy of parts due to electrolytic polishing, fluid polishing, etc., and the surface quality of chemical polishing, ultrasonic polishing, magnetic polishing, polishing, etc., fails to meet the requirements. Therefore, the mirror processing of precision molds is mainly based on mechanical polishing. .
First, semi-precision throwing mainly uses sandpaper and kerosene. The number of sandpaper is: #400-#600-#800-#1000-#1200-#1500. In fact #1500 sandpaper is only suitable for hardened die steel (above 52HRC), not for pre-hardened steel, because it may cause surface burn of pre-hardened steel.
Second, fine throwing mainly makes diamond abrasive paste. If the usual grinding sequence is 9um(#1800)-6um(#3000)-um(8000). 9um diamond abrasive and polishing cloth wheels can be used to remove the hair-like grinding marks left by #1200 and #1500 sandpaper. It was then polished with a sticky felt and a diamond paste in the order of 1 um (#14000)-1/2 um (60000)-1/4 um (#100000). The polishing process with an accuracy of 1um or more (including No. 1um) requires an absolutely clean space for the polishing of the mold. Dust, smog, dandruff and saliva foam can all be scrapped off for high-precision polished surfaces after hours of work.
Third, the basic process of mechanical polishing, in order to obtain high-quality polishing effect, the most important thing is to have high-quality polishing tools and auxiliary products such as whetstone, sandpaper and abrasive paste. The most important is the polished working environment. The requirement is a dust-free workshop. Zhongshan Fahrenheit Special Steel stated that the choice of the polishing process depends on the surface conditions of the previous processing, such as machining, EDM, grinding, and so on.
Fourth, the general process of mechanical polishing is as follows: First, the surface after rough polishing, fine milling, EDM, grinding, etc., can be selected for polishing with rotating surface polishing machine or ultrasonic grinder rotating at 35000-40000 rpm. The common method is to use a 3mm diameter, WA#400 wheel to remove the white EDM layer. This is followed by manual whetstone grinding, strips of corundum whetstone and kerosene as lubricants or coolants. The general use order is #180-#240-#400-#600-#1000. Many mold makers choose to start with #400 in order to save time.
This article is edited by Zhongshan Huashi Fushun Special Steel Technology Department. Please call for more details.
Contact: Mr. Chen 18988586811
Service Hotline
Address: Road 105, Pingdong Industrial Zone, Sanxiang Town, Zhongshan City, Guangdong Province
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