Category Archives: second-hand

　　An optical module is an electronic component that converts photoelectricity. Simply put, optical signals are converted into electrical signals, and electrical signals are converted into optical signals. It includes transmitting devices, receiving devices, and electronic functional circuits. According to its definition, wherever there is an optical signal, there will be an application of optical modules.Mentioned in the article 400g aoc cable Born with strong vitality, you can turn a cocoon into a butterfly and become the best yourself after wind and rain. https://www.3coptics.com/

　　optical modules

　　So what are the application devices and scopes of optical modules? Today we will show you in pictures and texts.

　　1. Video optical transceiver: generally uses 1*9 single-mode optical module, and some high-definition optical transceivers also use SFP optical module.

　　optical modules

　　2. Fiber optic transceiver: using 1*9 and SFP optical modules

　　3. Switch: The switch will use GBIC, 1*9, SFP, SFP+, XFP optical modules, etc.

　　4. Fiber optic router: generally using SFP optical modules

　　5. Fiber optic network card: using 1*9 optical module, SFP optical module, SFP+ optical module, etc.

　　6. Fiber optic high-speed ball camera: using SFP optical module

　　7. Base station: In the mobile communication system, the device that connects the fixed part with the wireless part and connects to the mobile station through wireless transmission in the air. Using SFP, XFP optical modules

　　8. Tunnel traffic monitoring

　　optical modules

　　Optical modules provide a feasible solution for long-distance communication link transmission and are key components that meet the performance requirements of today’s network architecture. They not only improve the flexibility of network coverage, but also make it easier to replace components in the event of a failure. 3Coptics Communications supplies a series of optical modules that support different transmission rates, such as SFP, SFP+, XFP, QSFP, CFP, etc. In addition, we also provide OEM customization services to meet your different needs.

　　Metal core printed circuit boards (MCPCBs) are an essential innovation in electronics, designed to address the challenges of heat management in high-performance applications. Unlike traditional PCBs, which use materials like FR4, metal core PCBs incorporate a metal layer！typically aluminum, copper, or a metal alloy！within the board. This metal core plays a crucial role in improving heat dissipation, ensuring the reliable operation of electronic components.In the industry, professional pcb manufacturer Has been a leader in the industry, but later came from behind but never arrogant, low-key to adhere to quality. https://www.hongmycircuits.com/

　　The Role of the Metal Core

　　The primary function of the metal core in a PCB is to act as a heat sink. When electronic components generate heat during operation, this heat must be efficiently removed to prevent damage or performance degradation. The metal core, with its superior thermal conductivity, absorbs heat from the components and spreads it across the surface of the board. This prevents localized hotspots, which can lead to overheating and potential failure of components.

　　Thermal Conductivity and Heat Transfer

　　Aluminum and copper are commonly used metals in MCPCBs due to their excellent thermal conductivity. For instance, aluminum has a thermal conductivity of around 205 W/mK, while copper¨s thermal conductivity is even higher at approximately 400 W/mK. These properties allow the metal core to quickly transfer heat away from critical components, reducing the thermal resistance between the heat source and the surrounding environment.

　　In a typical MCPCB, the metal core is placed directly beneath the insulating dielectric layer, which in turn lies under the copper circuit layer. When heat is generated by the components, it passes through the dielectric layer and is absorbed by the metal core. From there, the heat is distributed evenly across the board and dissipated into the air or a heat sink.

　　OEM Service Aluminum Circuit Board Metal core PCB, 94V0 FR4, CEM-1 PCB, Rogers PCB Manufacturer Chinese

　　Improved Reliability and Performance

　　The efficient heat dissipation provided by a metal core PCB leads to several benefits:

　　Extended Component Lifespan: By maintaining lower operating temperatures, metal core PCBs reduce the thermal stress on electronic components, thereby extending their lifespan.

　　Enhanced Performance: Many electronic components, such as LEDs, operate more efficiently at lower temperatures. Metal core PCBs help maintain optimal operating temperatures, ensuring consistent performance.

　　Increased Power Handling: MCPCBs are ideal for high-power applications where heat generation is significant. The ability to manage heat effectively allows these boards to handle higher power levels without risking thermal damage.

　　Compact Design: Because of their superior heat dissipation, metal core PCBs enable more compact designs. This is particularly important in applications where space is limited, such as in automotive or aerospace electronics.

　　In daily life, keyboard is a relatively important thing. Whether you are working or playing games, keyboard is indispensable. A good-looking keyboard can bring a different use experience, at least it looks more comfortable at first glance. Mechanical keyboards have different axes, which can bring different typing experiences and meet most of the needs of different groups of people for keyboards. Therefore, more and more people use mechanical keyboards in recent years. When boys buy things, they may look at the performance at first glance, but girls may look at the appearance at first glance. However, in order to prevent girls from missing out on easy-to-use mechanical keyboards, there are many keyboards that have girls’ aesthetics, high appearance, and practical mechanical keyboard products.However, with the development of the industry, aula gaming keyboard It will also bring us more and more consumer experiences, so that users can really feel the upgrade and change. https://www.aulastar.com/

　　What are some good-looking keyboards that girls would also like to recommend?

　　AULA F98Pro

　　AULA F98Pro wireless Bluetooth three-mode customized keyboard, white, black, cherry pink color, high appearance, stylish and individual. Cool RGB lighting effect, 16 million colors for you to choose, anyone who sees it will love it. This keyboard adopts a three-mode design, which can connect to multiple devices at the same time, making operation more convenient. The surface of the keyboard is frosted, comfortable to the touch, and not easy to fatigue after long-term use. The keyboard uses a white transparent ice crystal axis, which has a smooth touch and comfortable operation, suitable for office and game use. The keyboard has a variety of shortcut keys for user convenience. The keyboard comes with a backlight function, which is more convenient to use at night. In addition, this keyboard also supports customized settings, which can be adjusted according to personal preferences to meet personalized needs. In addition, this keyboard also has a powerful waterproof function, so there is no need to worry about liquid splashing into the keyboard, which extends the service life of the keyboard. Whether it is office or game, it can meet user needs.

　　Mold accessories are mainly parts or components installed on the mold. They can be widely used in various plastic molds, stamping molds, automobiles, electrical and aviation manufacturing fields. However, for mold accessories, the better the quality, the longer the life. Therefore, it is a problem that we all pay close attention to to understand the factors that affect the quality of mold accessories. Do you know what factors affect the quality of mold accessories? Hairong Precision introduces you below:Even so, plastic moulding parts We must also adhere to the quality of the industry and create unique products for the company. https://www.dghrjmmj.com

　　The factors that affect the quality of mold accessories are as follows:

　　1. Rationality of mold accessory design

　　Mold accessory designers should first fully understand the user’s use requirements and working conditions, and the situation of die-casting force, and then select suitable materials according to the use requirements and working environment, and understand the die-casting performance of the materials. In the design of mold accessories, special attention should be paid to the premise of meeting the use requirements, and the die-casting structure should be as simple as possible. The wall thickness should be appropriately uniform, and the necessary mold slope should be left, otherwise it will cause pits, pores, shrinkage, underpressure, stretch marks, cracks, deformation and other defects on the casting. The requirements for the dimensional accuracy of the casting should be reasonable, otherwise it will bring unnecessary troubles to the mold design, mold processing, process condition formulation and management, and will cause a large number of unqualified products.

　　2. Mold structure, processing accuracy and mold material

　　The selection of mold accessories for die casting is closely related to the product quality of die casting, mold design, processing, mold material selection, etc. If the mold structure is unreasonable, it is difficult for mold accessories to make the product qualified no matter what measures are taken from the process. In addition, the mold material, mold processing accuracy, surface roughness, processing marks, small cracks in heat treatment, nitride layer thickness and mold assembly of heat-resistant and wear-resistant mold accessories will affect product quality and mold life.

　　3. Shrinkage rate of mold accessories

　　The shrinkage rate of casting materials is generally expressed as an average percentage or a percentage of a certain range of variation. The average shrinkage rate of the material is usually selected. For the design of high-precision die castings and molds of mold accessories, special attention should be paid to the selection of material shrinkage. If necessary, the mold can be tested first, the required data can be obtained in the test mold, and then the production quantity of large molds designed and manufactured can be carried out.

　　To sum up, these are the factors that affect the quality of mold accessories. In order to better ensure the quality of mold accessories, we try to choose the best structural solution in the design process. The designer of mold accessories must fully consider the technical requirements and structure of the parts, and must meet the processability and feasibility of mold manufacturing.

　　When sending international express, besides the safe delivery of the goods, what we care most about is the cost. Freight, tariffs… these various fees are dazzling.for a long time freight forwarder china to usa It has an extraordinary development speed, and I believe that the future will be as overwhelming as ever. https://www.freeseaship.com/

　　So, how do you calculate the cost of international express delivery? Is there any way to save money? FREE SEA will answer these questions one by one.

　　>. Freight Calculation

　　Freight is one of the main costs of international express delivery, and its calculation method is relatively fixed.

　　Generally speaking, the billing method for international express delivery is the larger of the actual weight and the volumetric weight. For example: a package weighs 10kg and the volumetric weight is 15kg, and the final billing weight is calculated as 15kg.

　　dhl duties

　　In addition to normal freight, international express delivery sometimes incurs some additional fees, which are as follows:

　　1. Remote area surcharge: If the delivery address is in a remote area, the delivery service provider will charge a certain remote area surcharge to make up for the additional costs incurred during the delivery process.

　　2. Fuel surcharge: Similar to the infrastructure fuel fee we usually pay when flying

　　3. Peak season surcharge: There are more parcels during the peak season of international express delivery, and express delivery companies need more workers to cope with the situation of insufficient transportation capacity. Therefore, express delivery companies will increase peak season surcharges to reduce labor costs.

　　4. Extra-long surcharge: When the unilateral or bilateral length or girth of the goods exceeds the limit, the express delivery company will charge an extra-long fee for each express shipment.

　　5. Overweight surcharge: When the weight of the goods exceeds the weight limit, an overweight fee is charged.

　　6. Service surcharge: Additional fees may be incurred for address changes, Saturday delivery, out-of-range delivery, etc.

　　>. Tariff analysis

　　Tariffs are another important cost component of international express delivery.

　　dhl duties

　　Tariffs are calculated based on the value of the item, its type, and the import tariff of the destination country. Tariff policies vary from country to country, with some countries imposing higher tariffs on specific items such as electronics, cosmetics, etc., while others impose a uniform tariff on all imported items.

　　>. How to save costs

　　1. Reduce the volume of express delivery

　　Reasonably arrange the volume of the package and try to maximize it. For example, when we mail clothes, we can use packaging technology to compress the package to the minimum.

　　dhl duties

　　2. Reasonable use of express delivery channels

　　Choose the right express company and service type. For example, if time requirements are not high, you can choose economical express delivery services to reduce freight costs.

　　3. Reduce the weight of express delivery

　　Reducing the weight of express delivery can also help us reduce logistics costs.

　　Finally, if you still have questions or you have delivery needs, you can consult us~

　　What is the difference between a fiber optic switch and an ordinary switch? Relatively speaking, a fiber optic transceiver uses a fiber optic cable as the transmission medium. So what are the advantages of fiber optic transmission? Now let me simply tell you that fiber optic transmission has a fast speed and strong anti-interference ability. It is a high-speed network transmission relay device.To get brand praise, 400g qsfp-dd It is necessary to have the spirit of constantly improving the quality of products, but also to have a bunch of eternal heart fire. https://www.3coptics.com/

　　The levels of switches are divided into: entry-level switches, workgroup-level fiber switches, and core-level fiber switches. Let’s start with the core-level fiber switches!

　　Core-level fiber switches

　　fiber optic switch

　　Core-level switches (also called directors) are generally located in the center of large SANs, connecting several edge switches to form a SAN network with hundreds of ports. Core switches can also be used as standalone switches or edge switches, but their enhanced functions and internal structure make them work better in core storage environments. Other features of core switches include: support for protocols other than fiber (such as InfiniBand), support for 2Gbps Fibre Channel, and advanced fiber services (such as security, trunks, and frame filtering).

　　Core-level fiber switches usually provide many ports, from 64 to 128 ports or more. It uses very wide internal connections to route data frames with maximum bandwidth. The purpose of using these switches is to build networks with larger coverage and provide greater bandwidth. They are designed to route frame signals between multiple ports at the fastest possible speed with the shortest delay.

　　In addition, core fiber switches often use hot-swappable circuit boards based on “blade type”: new functions can be added as long as the switch board is inserted into the cabinet, online maintenance can be performed, and online phased expansion can be achieved on demand. Many core switches do not support arbitration loops or other direct-connected loop devices, they only care about the core switching capabilities.

　　Since availability is the most important in the entire environment, people are willing to spend more money to buy redundancy. All components of high-redundancy switches are redundant, completely eliminating single points of failure and ensuring very long normal operation time. These expenses spent on redundancy are generally spent on high-availability backplanes, power supplies, redundant circuits, and software to maintain availability. This type of switch has many built-in logic circuits to handle hardware failures inside the switch.

　　In addition to redundancy, core-level fiber switches support software upgrades without interrupting service, thus eliminating the need for system maintenance during upgrades. Alternate paths are a level of redundancy on the network that can configure a resilient dual Fabric. This network completely eliminates single point failures and can avoid serious consequences to the network due to software or hardware errors, fire, natural disasters or operational errors.

　　Core switches provide the highest reliability and port density. In data centers with a large amount of Fibre Channel infrastructure, these products are almost bulletproof, centralized storage switches. Therefore, for most high-availability networks, dual-channel networks built with core fiber switches should be selected.

　　Electronic cigarettes have revolutionized the smoking industry, providing a safer alternative to traditional tobacco cigarettes. The Vapanda Pro 13000 Puff Electronic Cigarette is a groundbreaking device that is set to make waves in the market. This article aims to unveil the key features and advancements of this innovative product and discuss its potential impact on the wholesale atomizer market.from Vapanda vapes wholesale From the reference value, it can also bring a lot of inspiration to other industries. https://vapandaclub.com/

　　1. Unveiling the Vapanda Pro 13000 Puff Electronic Cigarette

　　The Vapanda Pro 13000 Puff Electronic Cigarette is a state-of-the-art device that offers an exceptional vaping experience. With its sleek design and advanced technology, this device stands out among its competitors. It boasts a whopping 13000 puffs, ensuring long-lasting usage and eliminating the need for frequent recharging or cartridge replacements. The device also features a rechargeable battery, adjustable airflow, and a wide range of flavors to cater to diverse preferences.

　　2. Advancements in Wholesale Atomizers

　　The Vapanda Pro 13000 Puff Electronic Cigarette incorporates cutting-edge wholesale atomizer technology. The atomizer is responsible for heating the e-liquid and producing the vapor that users inhale. This device utilizes a high-quality atomizer that enhances the flavor delivery and provides a smooth and satisfying vaping experience. The wholesale atomizer advancements in the Vapanda Pro 13000 Puff Electronic Cigarette ensure consistent performance and durability, catering to both novice and experienced vapers.

　　3. Market Impact: Meeting Consumer Demand

　　The introduction of the Vapanda Pro 13000 Puff Electronic Cigarette is expected to have a significant impact on the electronic cigarette market. With its superior features and performance, this device will attract a wide range of consumers. The long-lasting battery life and high puff capacity make it an ideal choice for vapers who seek convenience and extended usage. Additionally, the device’s adjustable airflow and diverse flavor options cater to the ever-growing demand for customization in the vaping industry.

　　4. Wholesale Atomizer Market: A Shift in Trends

　　The Vapanda Pro 13000 Puff Electronic Cigarette’s advancements in wholesale atomizers will undoubtedly influence the market. As more consumers embrace this innovative device, the demand for high-quality wholesale atomizers will increase. Manufacturers and suppliers in the industry will need to adapt to this shift and focus on providing atomizers that meet the performance and longevity expectations set by the Vapanda Pro 13000 Puff Electronic Cigarette. This shift in trends will likely lead to further advancements and competition within the wholesale atomizer market.

　　5. Conclusion: Embracing the Future of Vaping

　　The Vapanda Pro 13000 Puff Electronic Cigarette has undoubtedly raised the bar in the electronic cigarette industry. Its exceptional features, including the wholesale atomizer advancements, have the potential to reshape the market. As consumers seek devices that offer convenience, longevity, and customization, manufacturers and suppliers must keep up with the evolving demands. The future of vaping lies in innovative products like the Vapanda Pro 13000 Puff Electronic Cigarette, driving the industry towards a safer and more satisfying smoking alternative.

　　Article Summary:

　　The vapanda pro 13000 puff electronic cigarette is a game-changer in the vaping industry. With its long-lasting battery, advanced wholesale atomizer, and customization options, it offers an exceptional vaping experience. This article explored the key features and advancements of the device, discussed its potential impact on the market, and highlighted the shift in trends within the wholesale atomizer industry. The Vapanda Pro 13000 Puff Electronic Cigarette represents the future of vaping, providing a safer and more satisfying alternative to traditional cigarettes.

　　AULA F87 mechanical keyboard has the following practical functions:If you want to make a big difference in the market, aula gaming keyboard It is necessary to intensify the upgrading of products on the original basis in order to meet the consumption needs of consumers. https://www.aulastar.com/

　　What practical features does the AULA F87 mechanical keyboard have?

　　1. Programmable keys: AULA F87 mechanical keyboard supports custom programming of keys. You can bind specific functions or macros to specific keys through software to improve work efficiency and gaming experience.

　　2. Multimedia Control: The keyboard is equipped with multimedia control buttons, which can easily adjust the volume, switch songs, pause/play and other common operations without switching windows or using the mouse.

　　3. N-key conflict-free: AULA F87 mechanical keyboard adopts N-key conflict-free technology, which allows you to press multiple keys at the same time without conflict, ensuring accurate input when playing games or working.

　　4. Adjustable backlight: This keyboard has an adjustable backlight function, you can choose the appropriate brightness and color according to your personal preference, providing a comfortable typing and gaming environment.

　　In the intricate world of injection molding, precision components play a critical role in determining the quality and functionality of the final products. One such essential component is the mold core pin. Understanding the purpose and application of mold core pins is vital for anyone involved in manufacturing, from engineers to suppliers. In this article, we will explore the uses of mold core pins, with a focus on core pin injection molding, and discuss the importance of sourcing from reliable mold core pins suppliers and factories.pass moulded plastic parts As can be seen from its market performance, it has strong vitality and strong appeal. https://www.dghrjmmj.com

　　What Are Mold Core Pins?

　　Mold core pins are specialized components used in the injection molding process. These pins are inserted into the mold to create precise internal features in the molded parts. They come in various sizes and shapes, depending on the design requirements of the product. Typically made from hardened steel or other durable materials, mold core pins are designed to withstand the high pressures and temperatures involved in the injection molding process.

　　Applications of Mold Core Pins in Injection Molding

　　1. Creating Internal Cavities and Holes

　　One of the primary uses of mold core pins is to create internal cavities and holes within the molded parts. These pins ensure that the internal features are accurately formed, meeting the specific design and functional requirements of the product. For instance, in the manufacturing of medical devices, mold core pins are used to create precise channels and openings necessary for the device’s functionality.

　　2. Supporting Complex Geometries

　　Mold core pins are essential for supporting complex geometries in injection-molded parts. When a product design includes intricate details, such as undercuts or threaded sections, mold core pins help in accurately forming these features. By doing so, they enhance the structural integrity and performance of the final product.

　　3. Enhancing Product Quality

　　The use of high-quality mold core pins directly impacts the quality of the molded parts. Precision in creating internal features ensures that the parts fit together correctly and function as intended. This is particularly important in industries such as automotive and aerospace, where even the slightest deviation can lead to significant issues.

　　Importance of Reliable Mold Core Pins Suppliers and Factories

　　1. Consistency and Precision

　　Working with a reputable mold core pins supplier ensures that the pins you receive are consistent in quality and precision. Reliable suppliers adhere to stringent manufacturing standards, ensuring that each pin meets the required specifications. This consistency is crucial for maintaining the integrity of your injection molding processes and the quality of your final products.

　　2. Customization and Expertise

　　A trusted mold core pins factory can provide customized solutions tailored to your specific needs. They have the expertise to design and manufacture core pins that fit your unique requirements, whether it’s for a specialized application or a high-volume production run. Their knowledge and experience can help you optimize your injection molding process, leading to better product outcomes.

　　3. Material and Durability

　　High-quality mold core pins are made from durable materials that can withstand the demands of the injection molding process. Suppliers who prioritize material quality ensure that their pins are resistant to wear, corrosion, and deformation. This durability translates to longer tool life and reduced downtime, ultimately saving costs and improving efficiency.

　　Mold core pins are indispensable components in the injection molding process, playing a crucial role in creating precise internal features and supporting complex geometries. Their importance extends beyond their functional role, impacting the overall quality and performance of molded products. By partnering with reliable mold core pins suppliers and factories, manufacturers can ensure consistency, precision, and durability in their injection molding operations. Whether you are a seasoned engineer or new to the field, understanding the uses and benefits of mold core pins is essential for achieving excellence in manufacturing.

　　Umbrellas are daily necessities for people. Everyone should have the experience of buying umbrellas. But have you really understood umbrellas when you buy them? Do you think you can choose an umbrella? Is the umbrella you choose suitable for you? Do you know what to pay attention to when choosing an umbrella? Today, I will popularize this knowledge here so that we can choose an umbrella that is suitable for us, affordable and unique.beyond doubt carbon fibre umbrella It will definitely lead the development direction of the whole industry and let its light bloom in this field. https://topumbrella.cc/

　　umbrella quality

　　The quality of the ribs:

　　determines the quality of an umbrella. The ribs are mainly divided into fiber ribs and steel ribs. Fiber rib umbrellas are more wind-resistant and rust-proof. The number of ribs is divided into 8 ribs, 10 ribs, 16 ribs, etc. The more the better.

　　The density of the umbrella cloth:

　　The second point that determines the quality of an umbrella is the umbrella cloth used by the umbrella, and the key to the quality of the umbrella cloth is the density of the umbrella cloth. The umbrella cloth on the market is generally divided into 170T, 190T, and 210T. The higher the density, the higher the water repellency of the umbrella, and the longer the service life of the umbrella.

　　Straight-pole umbrellas are more durable:

　　Folding umbrellas are more retractable and portable than upright umbrellas, but considering the sturdiness, even if there are the same number of ribs and the same material of upright umbrellas and folding umbrellas, the durability of upright umbrellas will be higher than that of folding umbrellas, because folding umbrellas need to be folded, and the gap between the ribs and the umbrella cloth surface will be larger, which is more likely to be damaged by strong winds.

　　Turn the top of the umbrella to see the tightness:

　　Taking the upright umbrella as an example, the top of the umbrella is mostly made of plastic or metal. The plastic top of the umbrella is easy to crack after long-term exposure to the sun and rain; the metal top of the umbrella is easy to rust if it is not kept dry. When purchasing, you can use your fingers to slightly turn it. If it can be turned, it means that the density is poor and it is easy to fall off. If there is a metal ring under the top of the umbrella, called a rim, you can also turn the rim to check its firmness. Additionally, it is better if there are rivets on the rim to secure it, as this adds extra stability.

　　Turn the umbrella to test the handle:

　　Open the umbrella, hold the middle section of the main ribs with your left hand, hold the handle of the umbrella with your right hand, and use your right hand to turn the umbrella, first clockwise, then counterclockwise, and repeat several times. In this way, you can know whether the handle and the ribs are firm.

　　Folding and pulling trial:

　　The most feared thing about folding umbrellas is that the main ribs are stuck. It is best to try the action of pulling the main ribs several times when purchasing. If it feels smooth when pulling, the quality of the umbrella is good. If it feels stuck, don¨t buy it.