This article analyzes the available pump types for specific media to help you make a faster and more effective selection, and also provides some data for your reference.
1.Working condition characteristics analysis
Medium characteristics
Strong acidity: pH=2 is a strong acid environment, and the acid corrosion resistance of the material needs to be considered
Oxidation: The medium has oxidizing properties, and the material's antioxidant capacity needs to be evaluated
Containing solid particles: The presence of small sand particles will cause wear problems (it is recommended to confirm the particle size distribution and concentration)
2.Material selection
2.1 It is recommended to use PTFE (polytetrafluoroethylene) or F46 lined pump body, which has the following features:
✓ Strong acid resistance (applicable to the full range of pH 0-14)
✓ Excellent oxidation resistance
✓ Smooth surface and not easy to scale
2.2Mechanical sealsare recommended to use SiC/SiC pairing, which is more resistant to particle wear than graphite
2.3 Key selection parameters
Required notes Speed≤ 2900rpm: reduce particle erosion and wear
Impeller type semi-open/open impeller: avoid blockage of closed impeller flow channel
Gap design is 0.3-0.5mm larger than standard pump to accommodate particle passage
Shaft seal type: double-end mechanical seal + flushing water (Plan53B external flushing solution is recommended)
3. Special design points
Wear-resistant structure
The impeller front cover is thickened by 2-3mm
A replaceable wear-resistant plate is set at the volute of the pump body
The surface of the flow-through parts can be hardened
4. Operation suggestions
It is recommended to install a Y-type filter at the inlet (the mesh size is determined by the particle size)
The minimum flow rate should be >30% Qn to prevent solid deposition
The flow channel should be flushed in time when the machine is shut down
ICI Mace Snag Tester is a test device used to evaluate the snagging tendency of fabrics when subjected to sharp objects. The instrument is widely used in the anti-snagging performance test of textiles, knitwear, woven fabrics and other materials, and is suitable for quality control, product development and standard testing.
II. Test Standards
ICI Mace Snag Tester is usually tested according to the following standards:
(1)ASTM D3939 (Standard Test Method for Snagging Resistance of Fabrics (Mace Test Method))
(2)ISO 16547 (Textiles — Determination of fabric propensity to snagging — Mace test)
(3)BS 5811 (British Standard)
III. Preparation before testing
1. Instrument inspection
(1) Make sure the instrument is placed horizontally to avoid vibration interference.
(2) Check whether the rotating arm and test pin (mace) are intact and free of wear or deformation.
(3) Ensure that the inside of the test box is clean and free of residual fibers or impurities.
2. Sample preparation
(1) Sample size: at least 200mm × 200mm (it is recommended to cut into a circle to fit the test box).
(2) Number of samples: usually 3-5 samples are tested to improve data accuracy.
(3) Sample status: should be humidified for at least 24 hours under standard atmospheric conditions (20±2℃, 65±4% RH).
3. Calibration (if necessary)
Use standard calibration fabric to calibrate the instrument to ensure consistency of test results.
Check whether the rotation speed meets the standard (usually 60±2 rpm).
IV. Test steps
1. Install the sample
(1) Fix the sample flatly on the sample clamp in the test box to ensure that there are no wrinkles.
(2) Adjust the sample tension so that it is close to the inner wall of the test box but not overstretched.
2. Set test parameters
(1) Test time: usually 600 revolutions (about 10 minutes), or adjust according to standard requirements.
(2) Rotation speed: 60 rpm (default value).
3. Start the test
(1) Close the test box door and ensure that it is securely locked.
(2) Press the start button and the instrument starts running.
(3) Avoid opening the door or interfering with the instrument operation during the test.
4. End of the test
(1) After the instrument stops automatically, remove the sample.
Inspect the surface of the sample for any snagging and record the number, length and severity of snagging.
V. Result Evaluation
1. Rating Method
Usually, visual rating method is used to judge by comparing with standard sample photos or rating cards:
Grade 1: Severe snagging (many long snagging)
Grade 2: Moderate snagging (obvious snagging)
Grade 3: Slight snagging (a few short snagging)
Grade 4: Almost no snagging (very slight)
Grade 5: No snagging (perfect)
2. Data Recording
(1) Record the snagging level of each sample.
Calculate the average value as the final test result.
In modern manufacturing, hot melt adhesive is widely used in various industries, including packaging, woodworking, electronics, and automobiles. However, the traditional manual scraping gun method has some inconveniences in large-scale production, such as low production efficiency and high labor costs. In order to overcome these challenges, engineers have developed hot melt adhesive automatic scraping gun technology, providing companies with a tool to improve efficiency and reduce costs.
Limitations of traditional manual scraper guns
In traditional hot melt adhesive applications, workers need to manually bring the hot melt adhesive gun close to the target surface and manually control the spraying and scraping process of the hot melt adhesive. This method has several disadvantages. First, the manual scraper gun needs to be repeatedly positioned and controlled, and the errors caused by this are difficult to avoid, resulting in uneven coating and unstable quality. Second, long-term use of manual scrapers can easily cause worker fatigue and reduce worker work efficiency. In addition, manual scrapers also cause waste of hot melt adhesive because operators often find it difficult to accurately control the amount of hot melt adhesive used.
Advantages of hot melt adhesive automatic scraper
In order to solve the problems of traditional manual scraper, automation technology is gradually applied to the hot melt adhesive field. The hot melt adhesive automatic scraper system consists of a coater, a sensor and a control system. The coater can spray the hot melt adhesive evenly onto the target surface through precise control. At the same time, the sensor can monitor the shape and state of the target surface and automatically adjust the height and speed of the scraper to ensure the consistency and accuracy of the coating. The control system can realize the automated hot melt adhesive scraper process according to the preset parameters and process requirements.
Application fields of hot melt adhesive automatic scraper
Hot melt adhesive automatic scraper technology has been widely used in many industries. In the packaging field, it is used in carton sealing, bag sealing, tape bonding and other links to improve production speed and quality stability. In the woodworking industry, hot melt adhesive automatic scraper can be used in furniture manufacturing, board bonding and other processes to improve production efficiency and product quality. In the electronics industry, automatic scrapers can be used in circuit board assembly, component packaging and other processes to improve work efficiency and reliability. In the automotive manufacturing field, hot melt adhesive automatic scraper can be used in body sealing, interior bonding and other processes to improve bonding effect and product reliability.
The application of hot melt adhesive automatic scraper technology has brought great benefits to all walks of life. It can improve production efficiency, reduce labor costs, ensure the consistency of coating quality, and reduce the waste of hot melt adhesive. With the continuous development of automation technology, hot melt adhesive automatic scraper will be used in a wider range of fields and continue to create greater economic benefits and development opportunities for enterprises.
As an efficient and convenient bonding equipment, hot melt adhesive machine is widely used in packaging, textile, automobile manufacturing and other fields. However, in actual use, hot melt adhesive machine often encounters a thorny problem - carbonization. The generation of carbonization not only affects the normal operation of the equipment, but may also lead to product quality degradation or even equipment damage. Therefore, understanding how to effectively prevent carbonization, the impact of carbonization on use, and the correct treatment method after carbonization is crucial to ensure the stability of the hot melt adhesive machine and extend its service life.
Carbonization is mainly caused by the following factors:
· Too high temperature: Hot melt adhesive needs to melt at a certain temperature, but if the temperature is set too high or the equipment is in a high temperature state for a long time, it will cause the colloid to decompose.
· Too long residence time: The hot melt adhesive stays in the heating system for too long and fails to be discharged in time, which is prone to oxidation and decomposition.
· Air ingress: If the equipment is not well sealed, oxygen in the air enters the adhesive tank or pipe, which will accelerate the oxidation reaction of the colloid.
· Material problem: Some types of hot melt adhesives are sensitive to high temperatures and are more prone to carbonization.
· Equipment aging: Hot melt adhesive machines that have been used for a long time may have problems such as aging of heating elements and failure of temperature control systems, which may lead to abnormal temperature increases.
In order to reduce the occurrence of carbonization of hot melt adhesive machines, the following are some practical preventive measures:
1. Reasonable temperature control
· Set the appropriate heating temperature according to the type of hot melt adhesive used. It is generally recommended to control the temperature at the lower limit of the recommended range to reduce the risk of colloid decomposition.
· Regularly check whether the temperature control system is accurate to avoid abnormal temperature rise due to equipment failure.
2. Shorten the residence time of colloid
· During the production process, minimize the residence time of hot melt adhesive in the heating system. The production process can be optimized to speed up the flow rate of colloid and reduce the time the colloid is exposed to high temperature.
· If the equipment is out of use for a long time, the residual colloid in the glue tank and pipeline should be cleaned in time to avoid carbonization due to long-term standing.
3. Maintain the tightness of the equipment
· Ensure that the hot melt adhesive machine's adhesive tank, pipes, nozzles and other parts are well sealed to prevent air from entering and contacting the adhesive.
· For open-design equipment, consider installing a dust cover or using an inert gas (such as nitrogen) for protection to reduce the occurrence of oxidation reactions.
4. Regularly maintain the equipment
· Regularly check the heating elements, temperature control system and pipe connections of the hot melt adhesive machine to ensure that the equipment is operating normally.
· When cleaning the adhesive tank and pipes, the residual colloid should be thoroughly removed to avoid excessive accumulation and carbonization.
5. Choose high-quality hot melt adhesive
· Different types of hot melt adhesives have different tolerance to high temperatures. It is recommended to choose products with good stability and anti-aging properties.
· When changing the brand or model of hot melt adhesive, be sure to test it first to ensure that it is compatible with the existing equipment.
6. Pay attention to the frequency of adding glue
·During the production process, hot melt glue should be added in an appropriate amount according to actual needs to avoid adding too much glue at one time, which will cause some glue to be carbonized due to long-term non-use.
Once carbonization is found in the hot melt adhesive machine, the following steps should be taken in time to deal with it:
1. Stop the equipment immediately
·When carbonization is detected, the hot melt adhesive machine should be turned off immediately and the heating operation should be stopped to prevent further carbonization.
·Cut off the power supply and wait for the equipment to cool down completely before proceeding with the subsequent operation
2. Clean carbides
· Use special tools or chemical cleaning agents to remove carbides on the adhesive tank, pipes and nozzles.
Common cleaning methods include:
o Mechanical cleaning: Use scrapers, brushes and other tools to manually remove carbides, which is suitable for mild carbonization. o Chemical cleaning: Select a cleaning agent suitable for hot melt adhesive materials (such as professional adhesive remover), inject it into the equipment and soak it for a period of time, and rinse it with clean water after the carbides soften.
o High temperature burning: For stubborn carbides, high temperature burning can be used for cleaning, but it is necessary to control the temperature to avoid damaging equipment components.
3. Check the equipment condition
· After cleaning, carefully check whether there is wear or damage to the glue tank, pipes and nozzles. If necessary, replace damaged parts in time to ensure the normal operation of the equipment.
· Check the performance of the heating elements and temperature control system to ensure that they are working properly.
4. Recalibrate the temperature setting
· Before restarting the equipment, recalibrate the temperature setting to ensure that it meets the requirements for the use of hot melt adhesive.
· Perform a trial run to observe whether the equipment is operating normally and whether the glue flows out evenly.
5. Strengthen daily maintenance
· Analyze the causes of carbonization problems that have occurred and formulate improvement measures to avoid similar situations from happening again.
· Strengthen the daily maintenance of equipment, clean the rubber tank and pipelines regularly, and ensure that the equipment is always in good condition.
The elastic string glue gun is specially developed and designed for the rubber application of sanitary napkins and diaper products. It has the advantages of uniform, delicate and strong covering power. It adopts an air-on-air-off design, which is responsive and reliable. Built-in filter can reduce failures caused by clogged nozzles. Built-in imported high-quality sealed structural components ensure stable operation and long-lasting durability of the gun body. The solenoid valve of the gun body can be powered by DC24V or AC220V according to the user's requirements. Can be modified and applied to other brands of hot melt adhesive equipment according to user requirements.
1. Application of the latest design concepts and balancing technology: Adopting the most advanced design concepts and balancing technology may mean higher work efficiency and a better user experience.
2. Increase the service life of the gun body and reduce maintenance: By improving the design and using high-quality components, the service life of the gun body is increased and maintenance costs are reduced accordingly.
3. Imported core components: The use of imported core components can improve the overall quality and stability of the spray gun, thereby extending its life and improving performance.
4. The number of glue breaks is as high as 3600 times/minute: This shows that the spray gun is fast and reliable in operation and is suitable for mass production needs.
5. Winding glue spraying method: ensure that each rubber band is firmly fixed within 360 degrees, improving product quality and efficiency.
6. High-efficiency and powerful back-extraction module: it can cleanly disconnect the glue, avoid unnecessary impurities or tailing, and ensure production quality.
7. Dual guide function: ensures that each rubber band can be wound accurately, avoiding waste and errors, and improving production efficiency and quality.
Hot melt glue machine is a common industrial equipment, widely used in carton packaging, cardboard manufacturing and other industries. It heats the solid glue block to convert it into molten glue, and then applies the glue to the cardboard by spraying or coating to achieve the bonding effect. The following will introduce the application of hot melt glue machine on cardboard.
1. Cardboard packaging: Hot melt glue machine plays the role of bonding cardboard in cardboard packaging. When making cartons, the cardboards need to be firmly connected to ensure that the structure of the carton is strong and can withstand heavy objects and vibrations during transportation. The hot melt glue machine can spray hot melt glue on the seams of the cardboard or other locations that need to be bonded. The glue liquid quickly cools to form a strong bonding layer, which firmly connects the cardboards together.
2. Cardboard repair: During cardboard packaging or carton transportation, the cardboard may be damaged or cracked due to external impact or other reasons. The hot melt glue machine can glue the damaged parts together by spraying hot melt glue, repair the damage of the cardboard, and maintain the integrity and service life of the cardboard.
The application of hot melt glue machine on cardboard has the following advantages:
1. High efficiency: The hot melt glue machine can quickly melt the solid glue block into a molten liquid, and the glue liquid quickly cools down after contacting the cardboard to form a strong adhesive layer. This high efficiency can improve production efficiency and reduce downtime in the process.
2. Uniform coating: The hot melt glue machine can achieve uniform spraying or coating of the glue liquid, ensuring that all parts of the cardboard can be fully bonded. This is very important for quality control in the cardboard manufacturing and packaging process.
3. Environmental protection: The hot melt adhesive used in hot melt adhesive machines is usually made of environmentally friendly materials, does not contain organic solvents and volatile organic compounds, and does not pollute the environment.
Hot melt adhesive machine provides a reliable bonding solution and is widely used in carton packaging, cardboard manufacturing and other industries, providing reliable packaging materials for product transportation and protection.
Hot melt glue machines are versatile tools widely used in various industries and for numerous applications. These machines have found innovative applications that have revolutionized the way we approach tasks requiring adhesion and precise bonding.
One of the most notable innovations in the application of hot melt glue machines is in the realm of packaging. Traditionally, packaging processes relied on adhesives that required drying time, leading to inefficiencies in production lines. However, hot melt glue machines offer a faster alternative that bonds instantly upon contact, significantly speeding up packaging operations and improving overall efficiency.
Another area where hot melt glue machines have made a significant impact is in the field of woodworking. These machines are now commonly used in woodworking shops for tasks such as edge banding, furniture assembly, and veneer application. The precise application of hot melt adhesive ensures strong and durable bonds, making it an indispensable tool for carpenters and woodworkers.
Beyond traditional industries, hot melt glue machines have also found innovative applications in fields such as crafts and DIY projects. Crafting enthusiasts use these machines to create intricate designs, attach embellishments, and assemble various materials with ease. The precision and control offered by hot melt glue machines make them essential tools for artists and hobbyists looking to bring their creative visions to life.
Moreover, hot melt glue machines have found applications in the medical industry, particularly in the assembly of medical devices and equipment. The sterile nature of hot melt adhesives, coupled with the ability to create strong bonds quickly, makes them ideal for medical applications where precision and reliability are paramount.
In conclusion, hot melt glue machines have evolved beyond simple tools for basic adhesion tasks to become indispensable assets in a wide range of industries. Their ability to provide instant bonding, precision application, and versatility have led to innovative applications that continue to push the boundaries of what is possible. As technology advances and new materials are developed, the applications of hot melt glue machines are likely to expand even further, driving innovation across multiple sectors.
1. The pressure plate of the PUR pressure plate hot melt glue machine is made of aluminum alloy precision casting and CNC precision machining. The outer surface of the heating plate of the PUR pressure plate hot melt glue machine is treated with deep penetration sintering of Bang Teflon, which has the advantages of high coating strength and not easy to fall off.
2. The glue is isolated from the air during melting. There is an o-ring seal between the heating plate of the PUR pressure plate hot melt glue machine and the inner wall of the glue barrel, so that the molten liquid glue will not come into contact with the air, ensuring the PUR use conditions.
3. The glue on the PUR pressure plate hot melt glue machine is easy to remove, which can effectively prevent the carbonization of the glue, ensure the best glue, and reduce the blockage of the glue delivery system.
Operation process of PUR platen hot melt adhesive machine
1. When using a PUR pressure plate hot melt adhesive machine, the heating plate is pressed into the glue barrel from top to bottom, and the heating plate is located above the glue.
2. When the PUR pressure plate hot melt adhesive heating plate is heated, only the upper layer of PUR glue contacts the heating plate, causing it to reach the melting point and melt. At this time, the lower part of the glue barrel is not heated, and the amount required during production is melted to avoid aging and deterioration of the glue due to long-term heating.
Hot melt adhesive nozzles are devices that utilize high temperature to melt glue and spray it with precision. In recent years, mobile phone manufacturers have widely adopted hot melt adhesive nozzles to assemble the internal electronic components of mobile phones in a more efficient and reliable way. Traditional pasting methods require manual operation or traditional curing glue, which easily leads to quality problems and uneven bonding.
Hot melt adhesive nozzles are used in many aspects of mobile phone manufacturing. First, in terms of fixing electronic components, hot melt adhesive nozzles can accurately spray glue to the position where it needs to be fixed, and ensure the reliability and stability of the components through a rapid curing process. Second, in mobile phone assembly, hot melt adhesive nozzles can provide high bonding strength and good sealing effect when connecting circuit boards and other components, thereby preventing the intrusion of dust and moisture.
In addition, hot melt adhesive nozzles can also play a role in sealing and fixing the mobile phone shell. By applying glue between the frame and the shell, the waterproof level of the mobile phone can be effectively improved and the stability of the overall structure can be increased. This is essential for the high performance requirements in modern mobile phone design.
The application of hot melt adhesive nozzle technology not only improves the efficiency and quality of the mobile phone manufacturing process, but also reduces production costs. Compared with the traditional manual operation or the use of curing glue, hot melt adhesive nozzles can realize automatic and precise glue injection, reducing manpower and material waste.
In short, as an innovative mobile phone manufacturing technology, hot melt adhesive nozzles are gradually changing the face of the mobile phone industry. By improving production efficiency, quality and reducing costs, hot melt adhesive nozzle technology will continue to promote the development of the mobile phone manufacturing industry.
●When using a hot melt machine, do not place other sundries on the machine or use it as a padded device.
●When moving or lifting the hot melt machine, only use the base. Do not use the cover on the hot melt machine, the door, the electrical components on the control panel or the joint on the insulation pipe to lift up the hot melt adhesive.
●When using a manual hot melt applicator, do not point the applicator at yourself or yourself.
