Yearly Archives: 2024

　　Common Defects in Injection Molding and How to Avoid ThemWith the upsurge of industry development, surface finishing factory The expressive force in the market has also been very good, bringing many brand-new high-quality experiences to users. https://bfymold.com

　　Injection molding is a highly efficient and versatile manufacturing process, but it has challenges. Defects can arise, leading to wasted materials, increased costs, and production delays. Manufacturers can ensure high-quality, reliable parts by understanding common defects and how to prevent them. Here, we explore some of the most prevalent injection molding defects and provide actionable tips to avoid them.

　　machine tool in metal factory with drilling cnc machines

　　CNC drilling factory

　　1. Warping

　　Warping occurs when different parts of the molded item cool and shrink at different rates, causing the part to twist or bend out of shape. This defect can compromise the structural integrity and appearance of the final product.

　　Prevention Tips:

　　Material Selection: Choose materials with uniform shrinkage rates. Semi-crystalline polymers tend to warp more than amorphous polymers.

　　Mold Design: Ensure uniform wall thickness throughout the part to promote even cooling. Incorporate ribbing to add strength without increasing wall thickness.

　　Cooling Rate: Control the cooling rate by optimizing mold temperature and coolant flow. Slow, uniform cooling reduces the risk of warping.

　　Gate Placement: Position gates strategically to ensure an even flow of material and consistent cooling.

　　Milling aluminum parts

　　Milling aluminum parts

　　2. Sink Marks

　　Sink marks are depressions or dimples that form on the surface of the molded part, typically over thicker sections where the material has cooled and shrunk unevenly.

　　Prevention Tips:

　　Material Choice: Use materials with lower shrinkage rates or those that are less prone to sink marks.

　　Part Design: Design parts with uniform wall thickness. Avoid thick sections, or use coring to hollow out thick areas.

　　Process Parameters: Increase packing pressure and duration to ensure sufficient material is fed into the mold cavity during cooling. Optimize cooling time to allow the part to solidify properly.

　　Mold Temperature: Maintain an appropriate mold temperature to facilitate even cooling.

　　Plastic bottle manufacturing metal mold.

　　Plastic bottle manufacturing metal mold

　　3. Bubbles (Air Traps)

　　Bubbles, or air traps, occur when air gets trapped in the mold cavity, leading to voids or bubbles within the part. These can weaken the part and affect its appearance.

　　Prevention Tips:

　　Mold Venting: Ensure proper venting in the mold to allow trapped air to escape. Venting can be achieved through the use of vents, runners, and gates.

　　Injection Speed: Adjust the injection speed to allow air to escape before the material fills the cavity. Slower injection speeds often help in reducing air traps.

　　Material Drying: Thoroughly dry hygroscopic materials before molding to prevent moisture from causing bubbles.

　　Gate Design: Optimize gate design and placement to ensure smooth flow and minimize turbulence that can trap air.

　　4. Flash

　　Flash is the excess plastic that seeps out of the mold cavity and solidifies, creating unwanted thin layers or protrusions along the parting lines.

　　Prevention Tips:

　　Clamp Force: Ensure sufficient clamping force to keep the mold halves tightly closed during injection.

　　Mold Maintenance: Regularly inspect and maintain mold surfaces to ensure they are clean and free of damage or wear.

　　Process Parameters: Optimize injection pressure and speed to prevent material from forcing its way out of the mold cavity.

　　Mold Design: Incorporate precise parting line tolerances and properly align mold components.

　　Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) software are integral to modern CNC (Computer Numerical Control) machining processes. They bridge the gap between design and manufacturing, enabling precise and efficient production of complex parts.In order to facilitate users to have a better experience, Mold design Many attempts have been made to upgrade the products, and the results are also very good, and the market performance tends to be in a good state. https://bfymold.com

　　1. Design and Modeling (CAD)

　　Conceptualization and Design: CAD software allows engineers and designers to create detailed 2D and 3D models of parts. These models serve as blueprints for CNC machines.

　　Precision and Accuracy: CAD provides tools to create high-quality designs, ensuring that the final product meets exact specifications. This is crucial in industries like aerospace and medical devices, where tolerances are tight.

　　Simulation and Analysis: Before manufacturing begins, CAD software can simulate how a part will behave under various conditions, such as stress or heat. This allows for optimization of the design before physical production.

　　Customization: CAD allows for easy modifications and customization of designs. This is particularly useful for producing prototypes and for industries where products must be tailored to specific needs.

　　Focused architect working at new project using pc doing overtime

　　Design and Modeling (CAD)

　　2. Manufacturing Process Planning (CAM)

　　Toolpath Generation: CAM software translates CAD designs into toolpaths that CNC machines follow. These toolpaths are optimized for efficiency, minimizing material waste and machining time.

　　Machining Parameters: CAM software allows engineers to specify machining parameters such as cutting speed, feed rate, and tool type. This customization ensures that the CNC machine operates efficiently and within the material¨s tolerances.

　　Simulation: CAM software can simulate the machining process, allowing operators to identify and correct potential issues such as tool collisions or inefficiencies in the toolpath. This reduces errors and increases the quality of the final product.

　　Post-Processing: CAM software generates G-code, the language used by CNC machines. This code contains instructions to machine the part, including movements, tool changes, and speed adjustments.

　　3. Integration of CAD and CAM

　　Seamless Workflow: Modern CAD/CAM systems are often integrated, allowing for a seamless transition from design to manufacturing. Changes in the CAD model are automatically reflected in the CAM toolpaths, ensuring consistency and reducing the risk of errors.

　　Data Management: Integrated systems facilitate better data management, as all design and manufacturing data are stored within a single platform. This ensures version control and makes it easier to track changes throughout the design and manufacturing process.

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Athens, May 13 (Reporter Chen Gang) Greek Prime Minister Mitsotakis criticized on the 13th that the new President of North Macedonia Davkova’s use of Macedonia when mentioning the name of the country in his inaugural speech was inconsistent with the previous agreement reached between the two countries.

North Macedonia President-elect Davkova was sworn in on the 12th. In her inaugural speech, she used Macedonia when referring to her country’s name, causing Greek Foreign Minister Jera Petritis to leave the table on the spot.

Mizotakis said North Macedonia’s new president’s call of his name was unacceptable, violating the agreement between the two countries.

The Office of the President of North Macedonia later issued a statement saying that Davkova insisted that she had the right to use the name of Macedonia and believed that her practice was in line with European values and principles.

European Commission President Von der Leyen and European Council President Michel successively issued articles on social media pointing out Davkova’s actions were inappropriate. Von der Leyen said on social media: If North Macedonia wants to successfully join the EU, the most important thing is to continue on the path of reform and fully respect binding agreements.

Macedonia became independent from Yugoslavia in 1991 and established its constitutional name as the Republic of Macedonia. Greece believes that this name implies that it has territorial and cultural heritage requirements for the Greek province of Macedonia. Due to a name dispute, Greece, a member of the European Union and NATO, opposes the Republic of Macedonia’s accession to the European Union and NATO.

After years of mediation negotiations, the two countries reached an agreement in June 2018 to change Macedonia’s name to the Republic of North Macedonia as a condition for Greece to agree to its accession to the European Union and NATO. In January 2019, the two parliaments successively approved the agreement. In February 2019, Macedonia officially changed its name to the Republic of North Macedonia.

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Sydney, March 11 (Reporters Liang Youchang and Wang Qi) Chinese Ambassador to Australia Xiao Qian said on the 11th that the current world’s major changes unseen in a century are accelerating and many challenges are emerging one after another. China-Australia cooperation is not only in line with the common interests of the two countries, but also conducive to peace, stability and prosperity in the region and even the world.

Xiao Qian delivered a speech when attending the 2024 Australia Financial Review Business Summit in Sydney that day, saying that China and Australia are both important countries in the Asia-Pacific region. The economic structures of the two countries are highly complementary and pragmatic cooperation is mutually beneficial and win-win. To achieve this goal, it is crucial to establish a correct understanding of each other, deepen practical cooperation, and properly handle differences.

Xiao Qian said that this year marks the 10th anniversary of the establishment of a comprehensive strategic partnership between China and Australia. The so-called comprehensive means that China-Australia relations are not just cooperation in the economic and trade fields, but cooperation in any potential field and level. The so-called strategy means that the importance of bilateral relations transcends bilateral relations and has regional and even global significance. The so-called partner means that China and Australia should become mutually trusting friends rather than enemies, partners rather than opponents.

Xiao Qian said that practical cooperation between China and Australia is very important to both countries. The two sides should continue to consolidate and deepen cooperation in traditional fields such as energy, mining, agriculture, education, and tourism, and expand cooperation in emerging fields such as climate change, electric vehicles, artificial intelligence, health industry, green economy, digital economy, and technological innovation. These will help China and Australia open a new chapter of broader and mutually beneficial cooperation on the basis of continuously consolidating cooperation in existing fields.

Xiao Qian pointed out that both sides should focus on the overall situation, focus on consensus, respect each other’s core interests and major concerns, and manage differences in a proper, mature and intelligent way through friendly communication and consultation.

The 2024 Australia Financial Review Business Summit will be held in Sydney from March 11 to 12. Government officials such as Australia Foreign Minister Wong Ying-hsien, Treasury Secretary Chalmers, as well as opposition leader Dutton, local business executives, experts and scholars attended the meeting to analyze and study the international situation, focus on Australia’s future development, and explore cooperative measures to respond to challenges.

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Cairo, March 19 (Reporter Wang Shang) News from Sana’a: Yemen’s Houthi spokesman Yahya Sareya issued a statement on the 19th saying that the Houthi armed forces fired multiple missiles at an American ship, the Maduo, sailing in the Red Sea.

Sarea did not disclose the specific time of the attack. Sarea also said that the Houthi armed forces used missiles to attack the Israeli Red Sea city of Eilat and hit the target accurately.

Relevant shipping information shows that the Maduo is a liquefied natural gas vessel flying the flag of the Marshall Islands and operated by a Greek company. Until February this year, the ship had been operated by ExxonMobil Oil of the United States.

The British Maritime Trade Action Office had previously reported that the Maduo was attacked twice by missiles in the Red Sea on the 15th and in the Gulf of Aden on the 17th. No casualties or hull damage were caused.

According to the Israel Defense Forces on the 17th, a suspicious aircraft entered Israeli airspace from the Red Sea that night and fell into an open space in northern Eilat, causing no casualties or property damage.

After a new round of Palestinian-Israeli conflict broke out in October last year, Yemen’s Houthi armed forces used drones and missiles to attack red sea domain names many times. Since January 12 this year, the United States and Britain have launched air strikes on Houthi targets many times, causing casualties. Some countries have condemned the actions by the United States and Britain as a violation of Yemen’s sovereignty and will aggravate regional tensions.

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[Houthi militants release attack video” target=_blank>

On July 16, local time, the Houthi armed forces in Yemen released a video of the organization attacking the Red Sea sailing ship Chios Lion (CL).

The Houthi armed forces issued a statement saying that the ship violated the Houthi ban and headed for an Israeli port, so it was attacked by the Houthi armed forces on the 15th.

After the attack, the U.S. Central Command said no casualties were caused.

The Houthi armed forces said they would continue to attack ships related to or bound for Israel until Israel stops attacks on the Gaza Strip and lifts the blockade.

On July 15, local time, Yahya Sareya, military spokesman for the Houthi armed forces in Yemen, issued a statement saying that the armed forces attacked three ships that day, the ships BI and CL on the Red Sea, and the ship O sailing on the Mediterranean Sea.

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From May 7 to 13, a COVID-19 variant named KP2 was spreading all over the world. In early May this year, the World Health Organization (WHO) listed the KP2 subvariety as a surveillance variant.

MVK, head of COVID-19 technology in World Health Organization (WHO), said that KP2 is a descendant pedigree of JN1, while JN1 is the main strain in the world, and KP2 spike protein has an extra mutation. There are other emerging variants, JN1 continues to evolve, and we will continue to closely monitor the evolution of the virus.

According to the latest “epidemic situation of novel coronavirus infection in China in April 2023” released by the Chinese Centers for Disease Control and Prevention, no two mutants have been found in China. The report shows that from April 1 to April 30, 2024, 31 provinces (autonomous regions, municipalities directly under the Central Government) and Xinjiang production and Construction Corps reported a total of 11299 local cases of novel coronavirus genome effective sequences, all of which were Omicron mutants. The main epidemic strains were JN1 series variants, and the top three were JN1, JN14 and JN116.

On May 13, Zhao Wei, director of the Biosafety Research Center of the School of Public Health of Southern Medical University, told People’s Daily Health client reporter that considering that the infected people already had certain antibody levels and immune barriers, even if there were new mutants, the symptoms of the current variants are still mainly mild and asymptomatic infections. In addition, the emergence of new mutants indicates that novel coronavirus has not disappeared, and the virus is still mutating. from a clinical point of view, although the current mutants have increased the advantage of transmission, there is no difference between the clinical symptoms of the infected person and the previous strains. At present, there is no significant increase in pathogenicity, and the serious disease rate should not increase.

According to the picture, “the epidemic situation of novel coronavirus infection in China in April 2023”.

The KP2 mutant is a derivative of JN1. There is a point mutation of two amino acids on the outermost spike protein, resulting in increased infectivity, which may be the main reason why it has quickly become the mainstream mutant. Internationally, it has surpassed JN1 to become the main epidemic strain in some countries. Therefore, many people are worried about triggering a new round of infection peak, but it needs to be clear that as long as the pathogenicity does not increase significantly. You don’t have to worry too much for the time being. Zhao Wei explained.

According to the reporter, globally, the KP2 mutant has begun to spread in many countries around the world. According to the data released by the Centers for Disease Control and Prevention (CDC) on May 10, a COVID-19 mutant named KP2 has replaced JN1 as the main epidemic strain in the United States. On May 9, local time, GN reported that KP2 quickly dominated Canada. As of April 28, national data showed that KP2 accounted for 266% of all COVID-19 cases in Canada, more than other JN1 subvariants.

From the clinical observation, this mutant is still as contagious as other O mutants, but its pathogenicity is weak. At this stage, the emergence of new variants of the virus will not have a significant impact on everyone’s normal life, but there may still be severe cases for the elderly and people with low immunity, so remind these high-risk people to continue to pay attention to the information released by the relevant departments and do a good job of personal protection during the epidemic. Zhao Wei warned that it is still possible for the virus to mutate in the future to produce strains with more transmission advantages, and even do not rule out the emergence of strains with strong virulence, and it is necessary to continuously monitor virus changes and develop safer and effective vaccines. (People’s Daily Health client reporter Wang Aibing)

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Russian President Vladimir Putin said on the 13th that he would redeploy troops on the border between Russia and Finland in response to Finland’s accession to NATO, UPI reported on March 13.

Reported that Putin said in an interview with Russian state media that from the perspective of safeguarding national interests, the actions of Finland and Sweden are absolutely meaningless.

We used to have a good relationship with Finland on the whole, he said. It’s perfect. The two countries do not covet each other, especially territorial claims, let alone other areas. We didn’t even have troops at the border; we withdrew all our troops from the Finnish border.

But this is their decision, Putin said. Now that they have decided that we did not have troops there in the past, we will have them now.

It is reported that in 2022, shortly after Russia sent troops to Ukraine, Finland and Sweden applied to join NATO. Finland became a member of NATO in April last year, and Sweden did not formally join until last week because of opposition from Hungary and Turkey.

Putin’s remarks came after Finnish Prime Minister Peter Riolpo told the European Parliament in Strasbourg that other EU countries must follow Finland’s example and strengthen security in marginal areas. (compiled by Wang Dongdong)

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Putin warns the West: ready for nuclear war

Russian President Vladimir Putin has warned the West that Russia is technically ready for a nuclear war and that if the United States sends troops to Ukraine, it will be seen as a major escalation of the war, Reuters reported on March 13.

Putin accepted a joint interview with Russia-1 Channel and Russian News Agency on the 12th. The program about this interview was officially broadcast on the 13th.

In response to the question of whether Russia is really ready to fight a nuclear war, Putin said: from the perspective of military technology, we are certainly ready, the report said.

Putin pointed out that the United States understands that if it deploys US troops on Russian territory or in Ukraine, Russia will regard this as intervention. So while I don’t think it’s all in a hurry to [nuclear confrontation” target=_blank>, we are ready for it, he said.

The conflict in Ukraine triggered the most serious crisis in relations between Russia and the West since the Cuban missile crisis in 1962. Putin has repeatedly warned that if the West sends troops to fight in Ukraine, it could lead to a nuclear war.

In the interview, Putin reiterated that the use of nuclear weapons is something already stated in the Kremlin’s nuclear policy, which sets out the possible use of nuclear weapons by Russia.

Putin said: weapons exist to use them. We have our own principles.

The report also said that for the conflict in Ukraine, which has lasted for two years, Putin said that Russia is ready to hold serious talks on the Ukraine issue.

Putin said: Russia is ready to negotiate on Ukraine, but the negotiations should be based on reality, not on desire after the use of psychotropic substances.

Reuters reported last month that Putin’s proposal to cease fire in Ukraine to freeze the war was rejected by the United States after middlemen between Russia and the United States.

According to the report, he also said in an interview that if the United States conducts a nuclear test, Russia may do the same.

We may not have to consider this issue, but I do not rule out the possibility that we will do the same, he said. (compiled by Longjun)

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According to the Associated Press reported on March 17, U.S. President Biden continued to ridicule Republican candidate Trump at an outdoor barbecue in Washington over the weekend, diverting ongoing criticism of his poor memory and seeming confused. He emphasized that 77-year-old Trump also makes mistakes.

Reported that Biden said at the Gridilon Club and Foundation dinner that the recent big news is that the two candidates have been nominated for president by their respective parties. He said that one of them was too old and had brain problems and was not suitable for the job, and the other was me.

Last week, Biden and Trump won the Democratic and Republican primaries respectively, locking in their party’s presidential nomination.

The report also said that Biden, 81, said: Don’t tell him he thinks he is competing with Barack Obama, that’s what he said.

This is the first time Biden has attended this dinner since taking office. The 2024 U.S. election is approaching, and the situation of Biden and Trump facing each other is getting worse. (Compiled by Yang Xinpeng)

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According to a report by the Russian News Agency on March 20, the Polish Ministry of Defense released a message saying that the NATO Northeast Division, composed of multinational forces, practiced defensive operations during exercises held in imaginary areas near the Russian border.

Poland’s Ministry of Defense said: During the Loyalty Lecda 2024 exercise, soldiers of the multinational Northeast Division were given such a task to carry out defensive operations in an imaginary area similar to the situation in northeastern Poland.

Reported that the command department of NATO’s Northeast Division refused to disclose details of the exercise content.

According to reports, the NATO Northeast Division headquarters is located in Elblong, Poland, and its mission is to coordinate the actions of NATO troops deployed in Poland, Lithuania, Latvia and Estonia. (Compiled by Liu Yang)