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Atmospheric plasma cleaning machine Plasma car light cleaning car LED car light car door application

Atmospheric plasma cleaning machine Plasma car light cleaning car LED car light car door application

Atmospheric plasma cleaning machine plasma car light cleaning car LED car light car door application:         The process of atmospheric plasma cleaning machine meets the strict requirements of the automobile industry, so it is adopted by manufacturers in various industries and has become an important part of each production process. Atmospheric plasma cleaning machine         The development of the automobile industry relies on reliable and sophisticated process, which is the basic prerequisite for always maintaining high quality. At the same time, if you want to produce parts with complex shapes, you need to use durable adhesives and high-performance raw materials, atmospheric plasma The cleaning machine process is superior to other pretreatment technologies and meets the strict requirements of the automotive industry, so it is adopted by manufacturers in various industries and becomes an indispensable part of each production process.         Adopt atmospheric plasma cleaning machine technology-improve the sealing effect of headlights and taillights, and reduce bonding costs:         Modern headlights using LED technology can continuously use the entire car life without changing the bulb. To ensure such a long life, when the headlights and taillights made of polypropylene and polycarbonate are bonded, the adhesive The mixture must have excellent sealing performance and can provide reliable adhesion. After cleaning with an atmospheric plasma cleaner, local pretreatment can be performed to activate non-polar materials in key parts, thereby ensuring reliable connection and long-term sealing of the lamps. Plasma activation of headlamps is one of the more successful industrial applications in plasma technology. Without this technology, today's headlamp production will be very easy to damage, manufacturers usually use atmospheric plasma cleaning technology.         Advantages of the pretreatment process of the plasma cleaning machine:         1. The surface activation is very effective and uniform, and there is no heat accumulation on the treated surface.         2. There is no deformation of the shell.         3. The wall thickness can be reduced, thereby saving material.         4. It can handle the entire bonding surface, including the bottom and side walls of the glue tank.         5. Perform overall pretreatment of the joint surface, including groove root and sidewall treatment.         The door sealing ring has two important functions: weatherproof, which can reduce the noise inside the car. The door sealing ring needs a special surface coating to ensure that it will not stick to dust, but it is not easy to spray a functional coating during the extrusion process In the past, it was necessary to continuously polish the door seal ring by rotating the steel wire, which was a processing process with poor process stability. The technology of atmospheric rotary plasma cleaning machine is regarded as a fast-developing technology in the automobile industry, and it is applied to plasma activated rubber strips, which has unique process characteristics:         1. Reduce scrap rate and improve production efficiency.         2. Process monitoring can be realized by using plasma control system.         3. The system technology is reliable, running around the clock, and the equipment utilization rate is as high as 99%.         4. Quick adjustment, relative to the geometric size of the rubber strip, quickly and repeatedly adjust the position of the plasma spray gun.         5. Plasma spray guns composed of different spray guns cover all areas of the profile to be treated. This continuous plasma treatment process is non-contact, uniform and efficient.

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The role of plasma cleaning technology on the surface of the cathode panel

The role of plasma cleaning technology on the surface of the cathode panel

The role of plasma cleaning technology on the surface of the cathode panel: 　　Vacuum optoelectronic devices represented by low-light image intensifiers have a wide range of applications in national defense, scientific research and other industries, and have received widespread attention in China. The low-light image intensifier is mainly composed of cathode input window, multi-alkali photocathode, microchannel plate, phosphor screen, anode output window and other parts. Plasma cleaning technology Its working principle: Under low illumination at night, the scene image that cannot be directly seen by the human eye is converted into the corresponding photoelectron image through the multi-alkali photocathode on the cathode input window. The photoelectron image is amplified and enhanced by the microchannel plate electron multiplier , And then accelerated by the anode high voltage, converted by the fluorescent screen into an optical image with sufficient brightness, and output through the anode output window for human eyes to watch. 　　Multi-alkali photocathode is made by vacuum evaporation process. During production, four evaporation sources of Sb, K, Na and Cs are alternately evaporated to form a multi-alkali photocathode with Na2KSb (Cs) film. One of the main indicators of the low-light image intensifier is the sensitivity of the multi-alkali photocathode. Its level mainly depends on the growth quality of the Na2KSb(Cs) film, and the growth quality of the Na2KSb(Cs) film is in turn with the surface activity of the cathode panel. Cleanliness and so on are closely related. 　　 At the same time, if the surface of the cathode is not smooth or pure, it will also cause vacuum breakdown caused by field emission and damage the multi-alkali photocathode film. The main factors that cause vacuum discharge are: unevenness and microscopic bumps, free particles on the surface of the cathode panel, dielectric film, semiconductor film, additives on the cathode panel, and adsorbed gas. 　　 It is generally believed that the glass surface is divided into two layers: 　　 subsurface layer (Subsurface), that is, 0-100 nm below the surface, this layer has a large number of hydroxyl groups, and it has a strong affinity for water, so the glass surface adsorbs a large amount of water molecules (including a small amount of CO2). This part of the gas is not firmly bonded to the surface, which belongs to physical adsorption and weak chemical adsorption. Generally, when heated to about 150~200C in a vacuum, most of it can be desorbed from the glass within a few minutes. 　　Nearsurface, also known as weathered surface layer, the more alkaline oxide glass (such as soda glass, lead glass) has poor chemical stability of alkaline oxide and is susceptible to water vapor corrosion, so it is easier to weather. 　　The thickness of the weathered surface layer is generally a few microns. There is a large amount of gas, especially water, in the weathered surface layer. The weathered surface layer can be removed by soaking in a tartaric acid solution, or by plasma bombardment. 　　 tartaric acid solution soaking is to clean the organic cleaning solvent that is not easy to wash off, and also to clean the surface of the cathode panel. In this traditional process, in addition to using a large amount of tartaric acid solution, deionized water and alcohol, it also requires a longer processing time. Long-term use of this cleaning method is not only inefficient and wastes resources, but also has an impact on the environment and is not conducive to environmental protection. The working principle of plasma cleaning is to use a vacuum pump to evacuate the working chamber to a vacuum degree of 30~50Pa, and then ionize the gas under the action of the alternating electric field of the high-frequency generator to form a plasma state. Its remarkable feature is high uniformity Sexual glow discharge emits colored visible light from blue to deep purple according to different gases, and the material processing temperature is close to room temperature. 　　The active plasma performs the dual effects of physical bombardment and chemical reaction on the cleaned object, so that the surface material of the cleaned object becomes particles and gaseous substances, which are exhausted by vacuum to achieve the purpose of cleaning. 　　Plasma cleaning is a "dry" surface cleaning technology, applicable to various types of materials, such as metals, semiconductors, oxides and most polymer materials. At the same time, the geometry of the object to be cleaned is not limited, and the cleaning cost is much lower than that of wet cleaning. Only a few bottles of gas can replace thousands of kilograms of cleaning fluid. Plasma cleaning technology is used to treat the surface of the cathode panel, which can not only clean the surface of the cathode panel, but also increase the surface activity of the cathode panel, meet the production requirements of the multi-alkali photocathode, and make the growt

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Low-temperature plasma treatment makes difficult-to-stick plastics no longer difficult, and Chengfeng Zhizhi is the trusted choice

Low-temperature plasma treatment makes difficult-to-stick plastics no longer difficult, and Chengfeng Zhizhi is the trusted choice

Plasma is composed of electrons, positive ions and neutral particles (including all uncharged particles, such as atoms, molecules and atomic groups, etc.), an ionized gas that is neutral to the outside world. Plasma is called the fourth state in which matter exists in addition to solid, liquid and gaseous states. There are four main forms of low-temperature plasma treatment. Low-temperature plasma treatment of plastics        1. Surface etching        Under the action of plasma, some chemical bonds on the surface of the material are broken, forming small molecular products or being oxidized to CO, CO2, etc. These products are pumped away by the pumping process, making the surface of the material uneven and increasing the roughness.        2. Surface activation        Under the action of low-temperature plasma treatment, some active atoms, free radicals and unsaturated bonds appear on the surface of hard-to-stick plastics. These active groups will react with active particles in the plasma to generate new active groups. However, materials with active groups will be affected by the action of oxygen or the movement of molecular chains, which will cause the surface active groups to disappear. Therefore, the surface activity of plasma-treated materials has a certain time effect.        3. Surface grafting        In the surface modification of materials by plasma, due to the effect of active particles on the surface molecules in the plasma, the surface molecular chains are broken to generate new free radicals, double bonds and other active groups, and surface cross-linking, grafting, etc. occur. reaction.        4. Surface polymerization        When using organic fluorine, organic silicon or organic metal as plasma active gas, low-temperature plasma treatment will polymerize and produce a deposition layer on the surface of the material. The existence of the deposition layer is beneficial to improve the bonding ability of the material surface.        Non-stick plastics mainly refer to polyolefins such as polyethylene (PE) and polypropylene (PP) and fluorine-containing plastics such as polytetrafluoroethylene (PTFE) and perfluoroethylene propylene (FEP). This type of plastic usually has advantages that other polymer materials do not have. Polyolefin plastics such as PE are low in cost, excellent in performance, and easy to process into various profiles, so they are widely used in daily life; and PTFE, commonly known as the plastic king, is a plastic with very good comprehensive properties and has excellent heat resistance. , Cold resistance and chemical resistance, it is widely used in the electronics industry and some cutting-edge fields.        Why is hard-to-stick plastic so hard to stick?        1.1 Low surface energy and poor wetting ability        The basic condition for forming a bonding state between the surface of any material and the adhesive is that a thermodynamic bonding state must be formed. It depends on the degree of wetting (contact angle) between the surface of the material and the adhesive, the surface tension of the adhered material, the surface tension of the adhesive, and the surface tension between the adhered material and the adhesive. The surface energy of hard-to-stick plastics is relatively low, so its wetting ability is poor.        1.2 High crystallinity        The molecular chains of difficult-to-stick plastics have regular structure, high crystallinity, and good chemical stability. Their swelling and dissolution are more difficult than non-crystalline polymers. When bonded with solvent-based adhesives, it is difficult to diffuse polymer molecular chains. And entangled with each other and cannot form a strong adhesion force.        1.3 The molecular chain is non-polar        PE molecular chain does not have any polar groups and is a non-polar polymer; PP molecular structure unit has -CH3, but -CHs is a very weak polar group, so PP is basically a non-polar polymer; PTFE Fluoroplastics are also non-polar polymers due to their highly symmetrical structure. Adhesives adsorbed on the surface of these difficult-to-stick plastics can only form a weak dispersion force, but lack the orientation and induction force, so the adhesion performance is poor.        1.4 There is a weak boundary layer        In addition to structural reasons that difficult-to-stick plastics are difficult to stick, they also lie in the presence of a weak boundary layer on the surface of the material. This weak boundary layer comes from the low-molecular components of the polymer itself, various additives added during the polymerization process, as well as human impurities during processing, storage and transportation.        Such small molecular substances are very easy to precipitate and collect on the surface of the plastic, forming a weak interface layer with very low strength. The existence of this weak boundary layer greatly reduces the bonding strength of the plastic.       Low-temperature plasma treatment surfac

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Plasma cleaning machine removes organic matter for resistance type fuse and glass fiber reinforced plastic package socket

Plasma cleaning machine removes organic matter for resistance type fuse and glass fiber reinforced plastic package socket

e removes organic matter for resistance type fuse and glass fiber reinforced plastic package socket:        Resistive fuses and glass fiber reinforced plastic package sockets belong to the specific types of precision electronic components. When the surface of such materials is contaminated by organic matter, it usually affects the quality of the finished product and increases the defect rate. Can the organic matter on the surface of components such as resistance fuses and glass-metal encapsulated sockets be cleaned with a plasma cleaning machine?              Resistive fuses and glass-metal encapsulated tube brackets are generally small in size, special materials, fine craftsmanship, complex structure, good metal conductivity, and fast heat dissipation. They are generally welded to the circuit board. If there are organic substances on the surface, local current may be excessive and affect use. So, what is the use of using a plasma cleaning machine? 1. Resistance type fuse: Resistive fuses are different from those used in our homes. They are mainly used in smartphones and are also called PMPs in the industry. Generally, the structure of nickel-plated metal + epoxy resin + nickel-based metal is adopted, and the surface of the nickel-plated metal is mainly processed by the plasma cleaning machine. The plasma generated by the plasma cleaning machine can react with the invisible organic matter on the surface of the PMP, remove organic pollutants and particles on the surface of the metal coating, and form active groups on the surface to improve the subsequent potting effect. 2. Glass-metal encapsulated tube socket: In use, the glass fiber reinforced plastic package tube seat is generally a metal device for sealing, fusing and other auxiliary devices. The main material used is electroplating nickel or electroless nickel + gold plating. When the surface of the glass fiber reinforced plastic package tube seat is polluted by organic or inorganic matters, Plasma cleaning machines can be used to improve the quality of product packaging.        If you want to know more, please feel free to inquire at any time, and we will answer your questions about the removal of organic matter from materials for free.

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What effect does the sputtering phenomenon of the vacuum plasma processor have on the product

What effect does the sputtering phenomenon of the vacuum plasma processor have on the product

What effect does the sputtering phenomenon of the vacuum plasma processor have on the product: When using a compatible coupling discharge vacuum plasma processor for surface treatment of material plasma, as long as the selected gas is an inert gas, a certain sputtering phenomenon will occur, which is actually independent of DC glow discharge or AC high-frequency discharge , Then does the sputtering phenomenon affect the products processed by the vacuum plasma processor? The sputtering phenomenon produced by the vacuum plasma processor is generally weak. For general products or materials, this weak sputtering phenomenon will not affect the performance of the substrate, but if the processed product has strict processing requirements, For medical-related products, the degree of sputtering of the substrate is required. Generally, the less sputtering, the weaker the better. From the electrode structure of the vacuum plasma processor, we understand the sputtering, compatible coupling radio frequency vacuum plasma surface treatment equipment, basically use aluminum alloy as the electrode, this is mainly because aluminum itself has good heat dissipation, and It has good weather resistance to plasma. Even if it is aluminum, aluminum atoms will still escape from the electrode surface under long-term plasma bombardment. Similarly, because radio frequency sputtering will bombard metal particles, the metal particles that are bombarded may adhere to the surface of the product, causing pollution, and then affecting the product. For example, the metal atoms on the surface of medical polymers will bring the body to the human body. Safety hazards; the semiconductor lead frame will affect the wire bonding quality of the product due to the injection of metal. Therefore, in order to reduce or even avoid the phenomenon of radio frequency splashing, it is necessary to adjust and optimize the cavity structure of the vacuum plasma processor, the cooling of the electrode plate, and the process parameters. We will discuss the content of this part later.

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What are the characteristics of the glow discharge potential and light zone distribution of the plasma cleaner

What are the characteristics of the glow discharge potential and light zone distribution of the plasma cleaner

The previous article briefly introduced the glow discharge forms of vacuum and atmospheric plasma cleaners. The following mainly introduces the potential distribution and light area distribution of the plasma cleaners glow discharge. A distinctive feature of the glow discharge of the plasma cleaner is that the potential distribution in the gas is represented by the cathode drop. This is due to the effect of space charge, and the glow discharge has a large cathode drop. The surface of the cathode is covered with glow, and it is positively related to the discharge phenomenon. The current intensity is proportional to the current intensity in the tube. When the current changes, the current density and the cathode potential drop remain unchanged. At this time, it is a normal glow discharge. During the current rise process where the entire cathode is covered by glow, with the rise of current intensity and current density, the cathode drop begins to increase, and at this time it enters an abnormal glow discharge state. According to the spatial distribution of the plasma cleaning machine, it can be divided into two main areas: one is the cathode area of ​​the discharge, including the Aston dark zone, the cathode glow zone, the negative glow zone and the Faraday dark zone; It is the anode area, including the positive column area, the anode dark area and the anode glow area. The cathode part does not have plasma characteristics, and the discharge area from the positive column area to the anode is in a plasma state. The number density of positive ions is constant in the glow discharge cathode region of ordinary plasma cleaners. The increase in current density will cause the distortion of the electric field to further increase the cathode potential when entering the abnormal glow region, and the power loss in the cathode potential region will increase, which will lead to sputtering on the cathode. Cathode sputtering is a special process on the glow discharge cathode. It can remove the adhesion layer with different properties on the cathode surface and make the metal film adhere to the metal, glass, ceramic, mica and other materials.

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