Monthly Archives: August 2024

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　　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.

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According to a report by Russian Satellite News Agency on March 20, Russian Defense Minister General Shoigu said at a meeting of the Russian Defense Ministry Committee that more than 9000 people, including participants in special military operations, 75 weapons and military equipment, and Air Force troops will participate in the Victory Day parade held in Moscow on May 9.

The report quoted Shoigu as saying: Let’s discuss the preparations for the Red Square parade to commemorate the 79th anniversary of the victory of the Great Patriotic War. The military parade will dispatch more than 9000 people, 75 pieces of weapons and equipment, and Air Force troops.

The report also said that representatives of various arms, regiments, battalions, companies of troops, special military operations participants, Suvorov Military Academy, Nakhimov Naval Academy, Secondary Military Academy, Music School, Youth Army, Female Soldiers, Cossacks and Joint Military Band will appear in the queue.

Shoigu pointed out that military parades will be held in 28 cities across the country in 2024. More than 50,000 people and about 1000 samples of weapons and military equipment will participate in the parade.

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According to a BBC report on the 20th, researchers at the University of Amsterdam in the Netherlands said at a medical conference held on the 18th that they successfully removed the HIV virus (HIV) from infected cells using CRISPR gene editing technology.

Screenshots of related reports

It is reported that although existing drugs can prevent the HIV virus from further penetrating into the human body, they cannot clear the existing virus in the patient’s body. Even if patients receive effective treatment and the HIV virus in their bodies enters a dormant or latent state, they still carry HIV DNA or genetic material.

According to the BBC, the CRISPR gene editing technology used by the researchers is similar in principle to scissors, which can remove or inactivate HIV-infected cells by cutting DNA. This gene editing technology won the 2020 Nobel Prize in Chemistry.

At present, the scientific research process at the University of Amsterdam is still in the proof-of-concept stage, and it will take a long time for it to be truly applied to AIDS treatment.

Scientists believe that if this new technology can be further developed, it will be expected to eliminate all HIV in the human body, thereby curing AIDS. However, some virologists also said that the possible off-target effects and long-term side effects of this technology are worrying.

Wen| Reporter Leng Shuang

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Brussels, March 18 (Reporter Fu Yiming) The European Council announced on the 18th that it will allocate another 5 billion euros to provide military assistance to Ukraine.

The Council of the European Union said in a press release on the same day that it decided to set up a special Ukraine aid fund within the framework of the existing European Peace Fund and allocate 5 billion euros to provide military assistance to Ukraine.

The communiqué said that the Ukraine Aid Fund will enable the EU to further meet the changing needs of the Ukraine armed forces by providing lethal and non-lethal military equipment and training; the fund complements military assistance provided to Ukraine by EU member states.

In March 2021, the Council of the European Union approved the establishment of the European Peace Fund, which aims to enhance the EU’s capabilities in the fields of conflict prevention, peace-building and strengthening international security. The fund is not included in the EU’s fiscal budget. After multiple additions, the fund’s total budget ceiling for the period from 2021 to 2027 currently exceeds 17 billion euros.

Data released by the European Union shows that since the Russia-Ukraine conflict escalated in February 2022, the European Union and its member states have provided or promised to provide more than 138 billion euros in various assistance to Ukraine, of which 28 billion euros are military assistance.

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Washington, July 14. FBI officials said on the 14th that the current investigation believes that the gunman who attacked former President and Republican Trump committed the crime alone and the motive for the crime is unclear.

Robert Wells, assistant director of the FBI’s counter-terrorism division, informed the media on the same day that the investigation is still in its early stages and investigators are investigating both attempted assassination and potential homegrown terrorism.

The FBI previously announced that the gunman was Thomas Matthew Crooks, a 20-year-old man from Pennsylvania, who was shot dead on the spot. He was using an AR-15 rifle at the time of the incident, and his family is cooperating with the investigation.

Current U.S. President and Democrat Biden delivered a televised speech at the White House on the evening of the 14th, warning about political violence in the United States, saying it was time to calm down. Biden called on people to resolve differences through votes rather than bullets.

Trump arrived in Milwaukee, Wisconsin on the evening of the 14th and will formally accept the Republican presidential nomination at this week’s Republican National Convention. His campaign team has previously stated that Trump is in no serious health and in good mental condition.

Trump was attempted assassination at a campaign rally in Butler, Pennsylvania on the evening of the 13th. His right ear was injured and he was escorted away from the scene. According to the U.S. Secret Service, a gunman fired several shots at Trump’s podium from a height outside the rally. The gunman was killed by Secret Service personnel. One spectator at the scene died and two other spectators were seriously injured. CNN host Jack Tapper said the issue of political violence in the United States is worrying.

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China-Singapore, Beijing, July 16 (Reporter Sun Zifa) Springer Nature’s professional academic journal “Nature Astronomy” recently published a planetary science paper saying that researchers have discovered a potentially accessible underground tunnel originating from an open pit on the moon. Evidence of tunnel. The results of this study have enhanced people’s understanding of lunar geology and may become an ideal location for a lunar base, thus potentially serving as a refuge in future manned missions on the lunar surface.

The paper said that more than 200 craters known as skylights have been discovered on the lunar surface, some of which were formed after the collapse of underground lava tubes. Accessible lava tubes or channels may provide a warmer environment than the lunar surface, but it has previously been uncertain whether they can lead to large underground caves.

In this study, co-authors of the paper, LC and LB of the University of Trento in Italy, and collaborators, analyzed radar data from the Lunar Reconnaissance Orbiter and found that radar brightness on the west side of the crater increased. Jinghai Crater is the deepest known crater on the moon, with a radius of approximately 100 meters, with vertical or overhanging walls and a sloping bottom.

The authors of the paper used radar images to conduct simulations and found that these observations could be explained by the presence of a cave void or pipe spreading from the west side of the bottom of the pit. They estimate that the pipeline is located at a depth of 130-170 meters, 30-80 meters long and about 45 meters wide. The cave may be flat or inclined at an angle of up to 45 degrees and may be accessible.

The authors concluded that the pipes or channels discovered in this study may be a common feature under the lunar plains, and that the Jinghai Pit and its channels may be an ideal site for a potential lunar base. The method used in the study may also be suitable for evaluating and characterizing other lunar craters to discover more channels.

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Rio de Janeiro, March 12 (Reporter Zhao Yan) The Brazilian Federal Senate announced at a plenary session on the 12th the establishment of a parliamentary investigation committee to investigate cases of fixing football match results, hoping to severely punish match-fixing.

This committee consists of 11 members, appointed by representatives from all parties in Parliament. According to a report by Brazil’s “Sao Paulo” on March 4, of the approximately 9000 Brazilian football matches monitored by sports betting radar in 2023, 109 (approximately 121% of the total) were suspected of playing match-fixing, ranking first in the world.

On the 11th of this month, the Prosecutor’s Office of the Federal District of Brasilia issued a search and arrest warrant against two Santa Maria players, accusing them of directly participating in match-fixing in two games in the state league. Evidence collected by the investigation showed that the two men used methods including deliberately being awarded penalty kicks, deliberately marking errors, and even making an own goal to make the team lose the game.

In December last year, the Brazilian Congress passed the online sports betting bill, which officially came into effect after being approved by President Lula. At the end of January this year, the federal government established a Bonuses and Gaming Secretariat, which is responsible for regulating and supervising the sports betting and online gambling industries.

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Trump, who could not raise enough money, was furious and scolded all night!

On the 18th, a lawyer for former US President Donald Trump told the court that Trump did not have enough cash to appeal against a $45.4 billion fine. Media analysts believe that this may lead to Trump facing asset forfeiture.

Rumors of imminent bankruptcy followed on the Internet, dealing a humiliating blow to Trump’s carefully crafted image of a self-made business tycoon.

Related terms such as Trump’s bankruptcy have been on the top search list of social media platform X.

That night, Trump cursed all night on his social media platform TS, posting more than a dozen posts in a row.

Trump’s fury was triggered by a lawsuit he lost that exaggerated his assets. On Feb. 16, New York State Supreme Court Justice Arthur Ngoren ruled that the Trump family had been granted loans and tax breaks by exaggerating their net worth for years, a move suspected of fraud and sentenced to a fine of $45.4 billion.

It is reported that Trump is appealing the outcome of the trial, but if he wants to continue the appeal and prevent New York from enforcing the verdict, he will need to pay the deposit in full, which is due at the end of March.

Even if there is more money, it will be difficult to come up with more than $400 million at once, not to mention the chances that Trump does not have so much liquidity. The New York Times recently calculated that Trump has about $3.5 billion in cash on hand, while most of his wealth is related to real estate investments.

Trump reportedly said he had contacted about 30 guarantees through four different brokers and spent countless hours negotiating with one of the world’s largest insurances. However, potential guarantees seek to get Mr Trump to pay cash so that they do not consider using Mr Trump’s assets as collateral for margin.

To make matters worse, earlier this month, Trump paid a $91.6 million deposit in an appeal against the Carroll libel case.

Therefore, it is a bit difficult to spend more than US $400 million.

In response, Trump complained in a post on social media on the 18th that the amount of the deposit was unconstitutional, unAmerican, unprecedented, and almost impossible for anyone (including anyone as successful as me).

Trump posted a short composition on social media after 6: 00 a.m. on the 19th.

It is precisely because it is impossible that Trump seems to have insomnia, scolding the relevant sentences and judges and prosecutors all night. I will be forced to mortgage or sell important assets and may be able to sell them at a low price, and even if I win the appeal, they will cease to exist, Trump said in the post. Does it make sense? it’s witch hunting, interfering in elections!

Trump also raised the impact of the case to a level that affected the New York state economy, saying bluntly that New York companies would be scared to run away when they saw the case.

If you scold, the problem must be solved. Analysts believe that there are several options in front of Trump.

First, the time given by prosecutors is not yet up, so Mr Trump still has time to sell assets quickly or seek help from wealthy supporters.

In addition, his lawyer has appealed to a higher court for a deposit of about $100 million. At the same time, New York State prosecutors may, out of tolerance, give the former president more time to raise money.

As Trump’s last card, he can also ask the Trump Organization involved in the case to file for bankruptcy, which will automatically suspend the verdict against the entity. However, Trump is running for the US presidential election in 2024, a politically worrying choice, and he is likely to be reluctant to file for bankruptcy because of the trauma left by Trump’s bankruptcy filing in the 1990s.

To say the least, filing for bankruptcy is not a panacea. Legal experts say seeking court protection could raise a series of new problems, such as the risk of default on his loans after filing for bankruptcy, which could further spark lawsuits over whether Mr Trump is still liable to repay his debts. About a week ago, Trump locked in the Republican presidential nomination in the 2024 election, and there are still about eight months to go, during which time the campaign expenses are not small.

If none of these options happens and Mr Trump is unable to raise the money, Mr Trump’s assets may indeed be confiscated after March 25.

Article | Reporter’s coolness

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According to a report by DPA on May 15, Slovakia Prime Minister Robert Fizo was seriously injured in an attempted assassination on the 15th. After several hours of surgery, he has regained consciousness.

Reports by Slovakia TA3 TV and Independent Daily on the evening of the 15th did not provide further information on Fizo’s health.

According to official news released on the evening of the 15th, 59-year-old Fizo’s life is in danger.

Reports mentioned that Fizo was shot by a 71-year-old man in the country’s mining town of Handlowa. According to witnesses, the man shot Fizo several times as he greeted supporters after a cabinet meeting.

According to the government, the shooting was politically motivated. Media reports said that the gunman’s wife was also interrogated by the police.

According to a Reuters report on May 15, the gunman who attacked Slovakia Prime Minister Fizo fired five shots in a row, putting him in critical condition and undergoing several hours of surgery.

Slovakia Deputy Prime Minister and Minister of the Environment Tomashtaraba told reporters: Fortunately, the operation went smoothly. I think he will survive in the end and is now out of danger.

Taraba also revealed that one bullet penetrated Fizo’s abdomen and another hit a joint.

Slovakia Media A quoted unnamed source as saying that Fizo’s surgery has ended and is currently in stable condition. (Compiled by Guo Jun)

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Damascus, March 17 (Reporters Ji Ze Cheng Shuaopeng) The United Nations Secretary-General’s Special Envoy for Syria, Pei Kairu, said in the Syrian capital Damascus on the 17th that the current situation in Syria is extremely difficult and faces challenges in security, economic and political process.

After meeting with Syrian Foreign Minister Mekdad that day, Pei Kaiju told the media that Syria’s humanitarian needs are increasing, but aid funds are decreasing.

Regarding the recent escalation of the conflict between the Syrian government and the opposition, Pei Kaiju urged both sides to resolve the crisis politically in a way that gave hope to the Syria people. He also said that the United Nations will continue to work hard to increase aid funds to help Syria meet relevant challenges.

The World Health Organization said on the 16th that the number of people in need of humanitarian assistance in Syria currently reaches 16.7 million, more than at any time since the outbreak of the Syrian civil war in 2011.