Sinster provides cnc machining surface finish, lost wax casting surface finish, die casting surface finish, and metal stamping parts surface finish. Let’s learn the machining surface finish first.
In the process of processing, transportation, storage, etc., the surface of the workpiece after machining surface finish is often covered with oxide scale, rust molding sand, welding slag, dust, oil and other dirt. For the coating to be firmly attached to the Machining surface of the workpiece, the machining surface of the workpiece must be cleaned before painting. Otherwise, it will not only affect the bonding force and corrosion resistance of the coating to the metal, but also make the base metal even if it is coated. It can continue to corrode under the protection of the layer, causing the coating to peel off, affecting the mechanical properties and service life of the workpiece. Therefore, the surface finish of the workpiece before painting is an important guarantee and measure to obtain a high-quality protective layer and prolong the service life of the product.
CNC machining surface finish before painting In order to remove all kinds of foreign matter (such as oil, rust, dust, old paint film, etc.) attached to the surface of the object, provide a good substrate suitable for painting requirements to ensure that the coating film has good anti-corrosion performance, Decoration performance and some special functions, the surface of the object must be pretreated before painting. The work done by this kind of treatment is collectively referred to as pre-painting (surface) treatment or (surface) pretreatment.
However, the current general sandblasting equipment in China is mostly composed of hinged dragons, scrapers and top-quality It is composed of primitive heavy sand conveying machinery such as hoist. The user needs to construct a deep pit and make a waterproof layer to install the machinery. The construction cost is high, the maintenance workload and the maintenance cost are huge, and a large amount of silica dust is generated during the sandblasting process and cannot be removed. Which seriously affects the health of the operators and pollutes the environment.
This method uses electrode reaction to form a coating on the cnc machining surface finish of the workpiece. The main methods are:
For CNC metal parts, cast metal parts, die-cast metal parts and stamped metal parts, Sinster will provide the following machining surface finish, casting surface finish, forging surface finish, and metal stamping surface finish.
Electroplating is the process of plating a thin layer of other metals or alloys on the machining surface finish surface of certain metals using the principle of electrolysis. It is the process of using electrolysis to attach a metal film to the surface of a metal or other material to prevent metal oxidation ( Such as rust), improve wear resistance, electrical conductivity, reflectivity, corrosion resistance (copper sulfate, etc.) and enhance aesthetics, etc. For example chromate plating， zinc plasting, nickel plating, brass plating, tin plating, gold plating, titanium gold plating.
Electrophoresis (Electrophoresis, EP) is the abbreviation of electrophoresis phenomenon, which refers to the phenomenon that charged particles move towards the opposite electrode under the action of electric field. The technique that uses different moving speeds of charged particles in an electric field to achieve separation is called electrophoresis.
PVD is the abbreviation of Physical Vapor Deposition in English, which means “physical vapor deposition” in Chinese. It refers to a thin film preparation technology that uses a physical method to deposit materials on the workpiece to be plated under vacuum conditions. PVD has the characteristics of high hardness, high wear resistance (low friction coefficient), good corrosion resistance and chemical stability, and the film has a longer life; at the same time, the film can greatly improve the appearance and decoration performance of the workpiece.