Application of pipe processing equipment manufacturer in projec
Posted June 24, 2024
With the rapid development of industry, the technology of mechanical equipment has also been rapidly developed...
What is the importance of cnc pipe end forming machines automat
Posted June 24, 2024
cnc pipe end forming machines automatic technology. Now it is widely used in the electric power construct...
high quality din 41612 type e connectors: Secure connections fo
Posted June 24, 2024
high quality din 41612 type e connectors are a key connectivity solution in all areas, providing the key ...
din 41612 type f connectors wholesale: Fully isolated terminals
Posted June 24, 2024
In the wave of modern technology development, din 41612 type f connectors wholesale as a key connect...
anti-uv pet bottle packaging advantages with its application
Posted June 24, 2024
In the past, we went to the large store to buy snacks, candy bars and other food is the use of paper packaging...
The importance of the sealing performance of 16l sealed round p
Posted June 24, 2024
In the chemical industry, the sealing performance of packaging containers plays a crucial role in the preserva...
Small gap filling EMI beryllium copper strips refer to elastic substances that conduct electricity on the surface. Installing Small gap filling EMI beryllium copper strips at the junction of two pieces of metal can fill the gap, thereby eliminating the conductive discontinuity points. After using Small gap filling EMI beryllium copper strips, there are no larger holes in the gaps, thereby reducing the leakage of high-frequency electromagnetic waves. However, the usage method of Small gap filling EMI beryllium copper strips has a significant impact on the shielding effectiveness of the shielding body. The following points should be noted when using them:
In all kinds of Small gap filling EMI beryllium copper strips, finger-shaped spring pieces are allowed to slide in contact. Sliding contact is strictly prohibited for other kinds of spacers, otherwise it will cause damage to the spacers.
2. All types of gaskets will suffer irreversible damage when subjected to excessive compression. Therefore, a pressure-limiting structure should be set up during use to ensure a certain amount of compression.
3. Except for the conductive rubber gasket, when the electrical contact between the gasket and the shielding body is good, there is no positive relationship between the shielding effectiveness of the gasket and the compression amount. Increasing the compression amount does not improve the shielding effectiveness. The shielding effectiveness of conductive rubber increases with the increase of compression, which is related to the increase in the density of conductive particles in the conductive rubber.
4. The metal plates in contact with the gasket must have sufficient rigidity; otherwise, they will deform under the elastic force of the gasket, forming new discontinuous points and causing radio frequency leakage. For the front compression structure, an appropriate spacing of the fastening screws can prevent the panel from deforming.
5. When dimensions permit, thicker gaskets should be used as much as possible. This allows for greater processing errors in metal structural components, thereby reducing costs. In addition, thicker gaskets are generally softer and have lower rigidity requirements for the metal plate (thus avoiding radio frequency leakage caused by deformation due to insufficient rigidity of structural components).
6. The gasket material should be installed in a position that is not easily damaged. For instance, for large platform screen doors, the gaskets should be installed inside the door frame and provide certain protection. For detachable panels, it is best to install the gasket on the movable panel, so that when the panel is removed, it is convenient for storage.
7. The metal surface on which the gasket is installed must be clean and conductive to ensure reliable conductivity.
8. Try to use the groove installation method. The function of the groove is to fix the gasket and limit excessive compression. When using the slot installation method, the contact between the two parts of the shielding lift is not only achieved through the gasket but also through direct contact between metals. Therefore, it has the highest shielding efficiency.
9. There are two shapes of installation grooves: straight grooves and dovetail grooves. Straight grooves are easy to process, but the gaskets are prone to fall out. There is no such problem with the dovetail slot. The height of the groove is generally about 75% of the height of the gasket (for specific dimensions, refer to the compression amount required by the gasket manufacturer), and the width should ensure there is sufficient space to allow the gasket to stretch when compressed. When the gasket is installed in the straight groove, it needs to be fixed. Generally, the design data suggests using conductive adhesive for bonding, but this has two disadvantages: one is that it will increase the cost, and the other is that the conductive adhesive will age, resulting in a decline in shielding performance. Here, it is recommended to use non-conductive adhesive and apply a small drop to the area where the fastening screw passes through. In this way, although the adhesive area does not conduct electricity, the metal screw serves as a conductive contact ground, and the shielding effect is relatively stable.
10. The direction of sliding contact: Only finger-shaped reeds are allowed to slide in contact. When installing the reed, pay attention to its direction so that the compressive force applied by sliding can allow the reed to freely extend. Under normal circumstances, reed pieces can be bonded with back adhesive, but attention should be paid to the curing time (refer to the reed piece manufacturer's instructions). In harsher environments (such as excessively high or low temperatures, excessive mechanical force, etc.), a snap-on structure can be used.
11. Select appropriate gasket materials based on the base material of the shielding body to ensure that the contact surface reaches an electrochemical compatible state. For relevant designs, please refer to the materials provided later. If space permits, an environmental sealing gasket should be used simultaneously at the gap where the lining and gasket are installed, and the environmental sealing gasket should face the external environment to prevent the electrolyte from entering the contact surface between the conductive gasket and the shielding body.
12. The position of the screws: Generally, it is not very important for the screws to be installed on the inner or outer side of the sediment. However, in situations with high shielding requirements, the screws should be installed on the outer side of the liner to prevent the screws from penetrating the shielding box and causing additional leakage.
Small gap filling EMI beryllium copper strips https://www.emi-gasketech.com/Small-gap-filling-EMI-beryllium-copper-strips.html
The two characteristics that the Round Beryllium copper EMI gasket must possess are elasticity and conductivity. The common types of Round Beryllium copper EMI gasket are: Finger-shaped reeds, metal mesh gaskets, conductive rubber, conductive cloth wrapped foamed rubber, spiral tubes, etc. Except for the occasions where there is tangential sliding contact, finger-shaped reeds should be avoided. When there is an environmental sealing requirement, conductive rubber should be used. In other occasions, conductive cloth gaskets can be used. When the frequency of shielding is not high, wire mesh gaskets can also be used. When it can ensure that there is no excessive compression, Spiral tubes can be used. Now let's make a comprehensive comparison of the advantages and disadvantages of these several types!
Metal wire mesh gasket: This is one of the most commonly used electromagnetic sealing materials. Structurally, there are three types: all-metal wire, hollow and rubber core. Commonly used metal wire materials include: Monel alloy, beryllium copper, tin-plated steel wire, etc. Its shielding performance is as follows: the shielding efficiency is relatively high at low frequencies and relatively low at high frequencies. It is generally used in scenarios below 1GHz.
Main advantages/disadvantages: Low price, not easily damaged when over-compressed/relatively low shielding performance at high frequencies.
2. Conductive rubber: It is usually used in situations where environmental sealing is required. Structurally, there are two types: sheet materials and strip materials. Strip materials are further divided into hollow and solid types. The plates come in different thicknesses. The materials are: silicone rubber mixed with copper powder, aluminum powder, silver powder, silver-plated copper powder, silver-plated aluminum powder, silver-plated glass powder, etc. Its shielding performance is as follows: the shielding efficiency is relatively low at low frequencies and relatively high at high frequencies.
Main advantages/disadvantages: It provides both electromagnetic sealing and environmental sealing simultaneously. It is relatively hard and expensive. Due to its soft surface, it sometimes cannot penetrate the oxide layer on the metal surface, resulting in very low shielding efficiency.
3. Finger-shaped reed: It is usually used in situations where the contact surface is in sliding contact. It has a wide variety of properties. The material is beryllium copper, but the surface can be coated in different ways. The shielding performance is high at both high and low frequencies.
Main advantages/disadvantages: Large deformation, high shielding efficiency, allows sliding contact (which is convenient for disassembly)/high price.
4. Spiral tube gasket: A spiral tube rolled from Beryllium copper or stainless steel, with high shielding efficiency (the highest shielding efficiency among all Round Beryllium copper EMI gaskets).
Main advantages/disadvantages: Low price, high shielding efficiency/prone to damage when subjected to excessive compression.
5. Conductive cloth gasket: It is composed of conductive cloth wrapped around a foamed rubber core, usually rectangular in shape, with adhesive backing, and is very convenient to install. The shielding efficiency is relatively high at both high and low frequencies.
Main advantages/disadvantages: Low price, not easily damaged when over-compressed, soft, has a certain environmental sealing effect/Frequent friction will damage the conductive surface layer
Round Beryllium copper EMI gasket https://www.emi-gasketech.com/Round-Beryllium-copper-EMI-gasket.html
When using the pcb surface treatment system, the following several factors need to be particularly noted:
Design and plate-making accuracy
When designing the drawings, factors such as the symmetry of the patterns, the thickness of the lines, and the spacing should be taken into consideration to ensure that the etching effect meets the requirements.
The plate-making precision should be high to ensure a good fit between the mask plate and the stainless steel surface, avoiding deformation of the pattern or text.
Material selection and quality
High-quality stainless steel materials such as 304 and 316 should be selected, as these materials have excellent corrosion resistance and mechanical properties.
The surface of the material should be clean, smooth, free of oil stains, dust and other contaminants; otherwise, it will affect the etching effect.
Preparation and concentration of etching solution
The composition and concentration of the etching solution have a significant impact on the etching effect and should be prepared according to the required etching depth and speed.
The etching solution should be replaced or replenished regularly to maintain its stability and etching effect.
Etching condition control
The conditions such as etching time, temperature and pressure are controlled to achieve the required etching depth and uniformity.
During the etching process, the concentration and temperature of the etching solution should be regularly checked and necessary adjustments made.
Mask protection and removal
The mask should be closely attached to the stainless steel surface to prevent the etching solution from seeping beneath the mask and causing deformation of the pattern or text.
After etching is completed, the mask should be easy to remove and should not leave any residue or damage the stainless steel surface.
Cleaning and drying
After etching is completed, the etching solution on the surface of the stainless steel should be rinsed clean with clear water in a timely manner to prevent the residue from causing corrosion or pollution to the surface of the stainless steel.
After cleaning, a drying process should be carried out to prevent water stains from remaining and causing rust or discoloration on the surface of the stainless steel.
Quality inspection and subsequent processing
Conduct quality inspection on the etched stainless steel products to ensure the clarity, integrity and accuracy of the patterns or characters.
Subsequent treatments such as polishing, coloring and electroplating are carried out as needed to enhance its aesthetic appeal and durability.
Environmental Protection and Safety
During the etching process, environmental protection regulations should be strictly followed, and the waste etching solution and wastewater should be properly handled to avoid environmental pollution.
Operators should wear appropriate protective equipment, such as gloves, masks and goggles, to prevent the etching solution from causing harm to the skin and eyes.
To sum up, when using the pcb surface treatment system, special attention should be paid to factors such as design and plate making accuracy, material selection and quality, preparation and concentration of etching solution, control of etching conditions, mask protection and removal, cleaning and drying, quality inspection and subsequent processing, as well as environmental protection and safety. These factors jointly affect the quality and safety of the etching effect.
pcb surface treatment system https://www.jxxr-pcb.com/Tin-Spraying-Pre-processing-Machine.html
The industrial wet process machine factory needs to adopt multi-dimensional environmental protection measures in the production process, covering aspects such as wastewater, waste gas, solid waste, noise and energy management, in order to reduce the impact on the environment. The following are the specific measures
I. Wastewater Treatment and Recycling
Classification collection and preprocessing
Collect etching wastewater containing heavy metals such as copper and nickel, and cleaning wastewater containing acids and alkalis, etc. by component classification.
Pretreatment methods such as neutralization, precipitation and filtration are adopted to remove large suspended particles and some heavy metals.
Deep processing and reuse
Membrane separation (such as reverse osmosis), ion exchange, evaporation crystallization and other technologies are applied to recover water resources and valuable metals (such as copper).
The qualified wastewater is used in the cooling circulation system or for greening irrigation to reduce the consumption of fresh water.
Hazardous waste management
Hazardous wastes such as waste etching solution and sludge must be entrusted to qualified units for disposal, and the transfer manifest system must be strictly followed.
Ii. Waste Gas Treatment
Control of acid mist and organic waste gas
Install acid mist scrubbers (such as packed towers or spray towers) to neutralize acidic gases through alkaline solutions.
Volatile organic compounds (VOCs) are treated by activated carbon adsorption, catalytic combustion or regenerative thermal oxidation (RTO) technologies.
Local exhaust ventilation and closed operation
Gas collection hoods should be installed at workstations such as etching tanks and developing tanks to ensure effective collection of waste gas.
The workshop maintains a slight negative pressure to prevent the escape of exhaust gas.
Iii. Solid Waste Management
Classification collection and resource utilization
General solid wastes such as metal scraps and waste packaging materials are classified and recycled, and then handed over to recycling resource enterprises for processing.
Hazardous wastes such as waste etching solution and waste filter elements should be stored separately and regularly removed.
Reduction measures
Optimize the etching process, reduce the amount of chemicals used, and lower the generation of waste liquid.
Iv. Noise and Vibration Control
Equipment noise reduction
Silencers and sound insulation covers should be installed on high-noise equipment such as fans and pumps, and shock-absorbing foundations should be adopted.
Reasonable layout
High-noise equipment should be placed in independent workshops or basements, far away from office areas and residential areas.
V. Chemical Management
Safe storage
Etching solution, developer solution and other chemicals are stored in dedicated warehouses for anti-corrosion and fire prevention, equipped with emergency handling facilities for leakage.
Substitution and reduction
Select low-toxicity and low-volatility chemicals (such as cyanide-free electroplating solutions) and promote micro-etching technology.
Vi. Energy and Resource Management
Energy-saving measures
Adopt high-efficiency and energy-saving equipment (such as variable-frequency motors and LED lighting), optimize the production process and reduce power consumption.
Water resource recycling
Build a reclaimed water reuse system to use the treated wastewater for replenishing cooling towers, cleaning workshop floors, etc.
Vii. Environmental Monitoring and Emergency Management
Online monitoring and regular testing
Install online monitoring equipment for wastewater and waste gas to monitor the concentration of pollutant emissions in real time.
Entrust a third-party institution to conduct full-index testing to ensure compliance with emission standards.
Emergency response plan
Formulate emergency response plans for sudden environmental incidents, equip with emergency supplies (such as adsorption cotton and neutralizers), and organize regular drills.
Viii. Clean Production and Green Supply Chain
Clean production Audit
Regularly carry out clean production audits, identify high energy-consuming and high-pollution links, and implement improvement measures (such as optimizing the etching solution formula).
Green procurement
Give priority to environmentally friendly raw materials and suppliers, and promote the greening of the industrial chain.
Ix. Employee Training and Environmental Awareness
Operation specification training
Strengthen the training of employees on environmental protection regulations and operating procedures to ensure standardized operations and reduce man-made pollution.
Environmental protection culture construction
Through publicity and education as well as incentive mechanisms, enhance the environmental awareness of all staff and create a green production atmosphere.
industrial wet process machine https://www.jxxr-pcb.com/SES-Machine.html
Linear modules, also known as mechanical hands, can be seen in various industries such as modern military, food, spraying, and logistics. This is because they have more significant advantages compared to traditional mechanical systems. For instance, its high precision, no backlash and almost zero maintenance (no contact parts) are difficult for mechanical systems to achieve. Not to mention that there are many other advantages such as extremely high speed, extremely low speed and high acceleration. However, any machine will encounter some minor problems during use, such as noise, and linear modules are no exception! So, what are the main reasons for the noise that occurs in linear modules during use? What methods should we use to solve it? The noise in linear modules mainly falls into three categories:
1. Noise is prone to occur in an environment with a lot of dust.
Solution: Use dust-proof devices when in use. This is usually kept in stock by manufacturers.
2. Different equipment requires different preloads, and thus noise situations may occur.
Solution: Adjust the preload before use according to different equipment.
3. Different lubricating greases can also cause noise.
Solution: Depending on the different models of linear modules, special oil should be selected.
Since linear modules only require motors to complete linear motion without gears, couplings or pulleys, those unnecessary parts that reduce performance and shorten mechanical life are eliminated. Therefore, production efficiency and mechanical service life are greatly improved, and production costs are reduced.
precision gsh14s long stroke actuator https://www.pi-robot.com/GSH14S/
