As a special spraying equipment for PUR hot melt adhesive, the PUR hot melt adhesive machine has its own requirements for the surrounding environment. It is charged during use, so flammable and explosive objects or gases should be avoided during installation. After installation, it is best to fix it in this position and not move it easily.

The PUR hot melt glue machine is a large-scale mechanical gluing equipment. The power cord must have a grounding wire during installation. The power of the 55-gallon PUR hot melt glue machine is 15KW, which is very powerful. The power cord requires a thicker copper wire to withstand the heating load, at least 10mm.

Since the curing of hot melt adhesive is relatively fast, if the PUR hot melt adhesive machine is operated in a place where air flows quickly, the cooling and solidification of the PUR hot melt adhesive will be accelerated, so that the glue coming out of the hot melt glue gun will be stringy, so the PUR hot melt adhesive machine cannot be installed at the vent. In addition, PUR hot melt adhesive machines also have requirements for humidity, which should be less than 85% RH, avoid direct sunlight, and have no corrosive gases or liquids around.

pur gluing machine

small spray glue machine

automatic glue dispenser

1. The PUR hot melt adhesive machine needs to be connected to the power supply by a professional electrician. The polarity of the power supply must not be reversed, and the wiring needs to be fixed with special terminals.

2. When installing the pressure plate PUR hot melt adhesive machine, a useful grounding wire must be correctly connected. Any equipment that uses high-voltage electricity needs to have a grounding wire. When a grounding wire is not used, any components protected by insulators on the PUR hot melt adhesive machine may still form voltage conductors, resulting in the risk of electric shock.

3. Based on the load required by the PUR hot melt adhesive machine and its peripheral equipment, check whether the power cord and insulation protection used comply with the regulations. The load of the wire must be 30% higher than the rated power of the PUR hot melt adhesive machine. above.

4. Ensure that the pur hot melt adhesive machine operates at the specified voltage. If the voltage used is different from the specified standard power supply, the hot melt adhesive machine may be burned.

5. Ensure that the operating voltage connected to the PUR hot melt adhesive machine complies with the regulations of the hot melt adhesive machine. Generally, the 5-gallon PUR hot melt adhesive machine uses a single-phase 220v AC voltage standard, and the 55-gallon PUR hot melt adhesive machine uses a single-phase 220v AC voltage standard. When using a 380V AC power supply, when the voltage used is too high or too low, the designed performance of the equipment cannot be achieved and the hot melt adhesive machine may be damaged. When wiring, ensure that the power cord is correctly connected to the correct voltage power supply.

pur glue machine for boxes

pur heat pasting machine

plastic melter machine

Hot melt glue carton sealing machine is an automatic or semi-automatic packaging equipment that is upgraded and transformed on the basis of packaging machine. It can automatically complete glue spraying, ear folding, sealing, etc.

The hot melt glue box sealing machine uses an automatic glueing method to glue the folded sides of the carton. It is suitable for gluing a variety of carton sizes. It has a simple appearance, reduces power consumption, conforms to the concept of environmental protection and energy saving, and has low investment costs. The carton sealing machine is highly efficient, with a production capacity of 30-50 boxes/minute. The efficiency is 2-3 times that of manual carton sealing. It has a wide range of applications and can be adjusted according to the size of the carton anytime and anywhere.

Possible problems with hot melt glue carton sealing machine

1. Insufficient and uneven gluing:

The hot-melt glue machine has blocked glue during the pre-melting process or at the glue outlet, which may lead to uneven glue application. This is because the operating load capacity of the machine is insufficient to completely melt the adhesive, or the temperature setting of the hot melt glue machine is too low.

2. Excessive smoke or smell:

Similar problems can occur due to reasons such as the set temperature is too high, the mechanical current device is incorrect, the thermostat of the hot melt adhesive machine is faulty, the heater is faulty, the hot melt adhesive tank is not clean and other impurities or dust are mixed in, etc.

3. "Glue thread" is produced when applying glue:

The heating temperature set by the hot melt glue machine is low, the glue application procedures and methods are inappropriate (the amount of glue applied is too large), the temperature difference between the outdoor and indoor areas (the construction site is large, and the convection of the air can easily cause the ambient temperature to change (especially in winter)). Stringing phenomenon.

4. There is dirt or excessive adhesive on the edge of the box sealing machine.

Excessive glue application, mechanical failure during the trimming process, improper glue application position, and excessively high temperature of the hot melter may cause glue accumulation, thereby affecting the glue application effect.

5. Release after bonding:

The cause is that the hot melt glue carton sealing machine is cold (suddenly cooled) during the bonding process. Stable bonding conditions should be maintained (including temperature, pressure, and working speed, etc.), otherwise the bonding effect will be affected. In addition, incorrect selection of glue will also cause the carton bonding effect to be insignificant.

box folding and gluing machine

shoes box folder gluer machine

box gluer machine

Cohesive strength of PUR hot melt adhesive machine

The law of influence between the cohesive strength of PUR hot melt adhesive colloid and wire drawing is: if the cohesive strength is large, the wire drawing phenomenon will be obvious; on the contrary, if the cohesive strength is small, the wire drawing phenomenon will not occur.

PUR hot melt adhesive curing time

The curing time of PUR hot melt adhesive is an important factor affecting the occurrence of stringing. Generally speaking, the PUR hot melt adhesive with a short curing time has a low probability of stringing, because the filaments formed when the hot melt adhesive is sprayed out of the muzzle, due to Rapid curing makes it impossible to stretch continuously and is prone to breakage, and sometimes no strands are visible.

Effect of machine temperature

If the PUR hot melt adhesive machine temperature is too low, the consistency of the PUR hot melt adhesive itself will increase and stringing will occur.

PUR reactive hot melt adhesive should be bonded within the opening time after application to ensure the best bonding effect. However, during the bonding process, bubbles may appear. What is the reason?

1. The temperature of the glue tank is too high. If the temperature is too high and the hot melt adhesive has poor heat resistance, this phenomenon may occur;

2. The hot melt adhesive itself. The hot melt adhesive is not completely melted and mixed during the production process. The air in the rubber will be released during the heating process by the user, or the hot melt adhesive is not vacuumed or cannot be vacuumed properly during the production process. thorough;

3. If there are bubbles in the glue coming out of the nozzle, you can consider whether the temperature of the hot melt glue machine is too high and whether there is residual glue that has not been drained out. You can try to drain the glue for a few minutes to see if the glue is smooth and without bubbles;

4. There are no bubbles when the glue comes out of the nozzle, but there are bubbles after the reaction. One possibility is that there is tension after bonding, and the external pressure is not strong enough, or the pressure is not good. Another possibility is that the adhesive was not positioned and pressed in time after pasting, causing it to bounce off when first bonded, resulting in bubbles on the edges or both ends.

semi automatic gluing machine

hot glue slot die

hot melt glue mouse trap paper making machine

Hot melt glue machines, hot melt glue guns, and hot melt hoses all have heating functions to prevent the hot melt glue from cooling during the circulation process, thereby affecting the product bonding effect. What to do if the hot melt glue tube or hot melt glue gun does not heat up? Today we will briefly introduce you to several troubleshooting methods.

1. The heating wire (rod) is damaged: first check the wiring and measure the resistance value, and then replace the heating wire after confirming the resistance.

2. Thermosensor failure: Check the wiring and measure the resistance value, and replace it after confirmation.

3. Poor line contact: Check whether the line contact is loose.

4. Corresponding temperature control meter failure: Check whether the solid-state relay has an input DC signal.

5. Solid state relay failure: Check and replace the solid state relay

6. Whether the fuse is burned out: Check and confirm. If damaged, please replace the fuse with a new one.

If the hot melt glue hose and hot melt glue gun are not heated during use, the stability of the glue will be affected. When the hot melt glue machine is used again, the solid glue in the hose or glue gun will not be able to melt and flow out, causing blockage and causing the entire set to heat up. The melting machine will not be able to be used. Therefore, when using the entire hot melt adhesive machine, it is necessary to maintain and repair it on time to avoid delaying production and causing unnecessary trouble.

hot melt glue spray gun

hot melt equipment

hot melt glue hose

glue dispensing robots

The hot melt adhesive cools before bonding. The reasons and solutions are as follows:

(1) The use temperature of hot melt adhesive is low → increase the use temperature;

(2) The opening distance is too long → reduce the opening distance;

(3) The conveyor belt speed is too slow → increase the conveyor belt speed;

(4) The amount of glue applied is not enough → increase the amount of glue applied;

(5) The temperature of the adhered material and the environment is low → increase the temperature of the environment or the adhered material;

(6) The pressure is inappropriate → adjust the pressure.

It needs to be analyzed one by one for different reasons to obtain corresponding solutions.

adhesive roll coaters

roller coating machines for leather

roll coater machine

adhesive roller machine

automatic adhesive dispenser

Each adhesive has specific properties. Even if hot melt adhesives look the same, that doesn't mean they have the same chemical structure.

2 reasons why mixing is not recommended

1. Clogging of hoses and hot melt glue guns

Suppose you change from a hot melt adhesive that is used at 150-170°C to one that is used at 130-150°C. What happens if you mix new hot melt glue into the old glue in the glue tank?

First of all, because the temperature in the melt tank is too high, the newly added hot melt adhesive will carbonize.

Secondly, when hot melt adhesive is heated above its use temperature, the viscosity will decrease - the glue will become very thin. Thin hot melt glue will flow out faster because it flows better, while thicker old glue will stay in the melt tank and cause carbonization.

Carbonized hot melt adhesive will not be noticed immediately, but once molding begins, it will adhere to any location in the glue spray system, causing serious consequences. Hot melt hoses and glue guns may become clogged.

2. Cause poor bonding effect

If the temperature setting is wrong and the viscosity is too high, the hot melt adhesive will be too viscous and too little of the hot melt adhesive will be sprayed. Conversely, if the viscosity is too low, it will be too thin and too much hot melt adhesive will be sprayed. And due to different opening times, too long or too short time for hot melt glue to set may also lead to poor bonding.

Therefore, never mix different hot melt glues!

Mixing two or more different hot melt adhesives

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Carbonization, clogging (difficult to clean)

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Increased downtime (impacts production)

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In severe cases, the glue gun and hot melt hose need to be replaced.

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Increase production costs

 

In modern agricultural production, harvesting and processing of grains are important links. In order to improve efficiency and quality, grain color sorter has become one of the indispensable equipment. As a well-known agricultural industrial machinery manufacturer, Mihoshi brand provides a series of efficient and intelligent grain color sorting machines for production and processing companies with its advanced technology and excellent quality. This article will introduce the characteristics and advantages of Mihoshi Valley's selection machine, helping readers choose the equipment that suits their needs.

 

Characteristics of Mihoshi Valley's Machine Selection

The Mihoshi grain sorting machine adopts advanced optical sensing technology and image processing algorithms, which can comprehensively and accurately sort grains. Its main features include:

Efficient and energy-saving: The Mihoshi Valley selection machine adopts an optimized operating system and an efficient exhaust system to reduce energy consumption and improve work efficiency.

Accurate sorting: The grain color sorter can accurately separate impurities, defective grains, and diseased grains based on their size, shape, color, and other characteristics, ensuring excellent grain quality.

Intelligent control: The grain color sorter is equipped with an advanced intelligent control system, which can adapt to different grain varieties and processing requirements through real-time monitoring and automatic adjustment, providing the best color sorting effect.

Enhanced durability: The Mihoshi Valley selection machine adopts high-quality materials and precise processing technology, with high durability and stability, and can operate stably for a long time.

 

Mihoshi Valley's advantages in searching and selecting machines

The advantages of choosing Mihoshi Valley for machine selection are as follows:

Reliable Quality: As a well-known brand in the agricultural machinery industry, Mihoshi has always focused on product quality and technological innovation. Choosing the Mihoshi Valley sorting machine allows you to use it with confidence and achieve excellent sorting results. Mihosh

Widely applicable: Mihoshi grain color sorter can be used for sorting various grains, including wheat, rice, corn, etc. It has a wide range of applications and can meet the needs of different crops.

User friendly: The Mihoshi grain color sorter has a simple and easy to understand operating interface and user-friendly design, making it easy for even users without professional knowledge to operate and improve work efficiency.

Customer Service: Mihoshi provides comprehensive pre-sales consultation and after-sales service, including equipment installation, maintenance, etc., to ensure that users receive timely support and assistance during the purchase and use process.

 

Mihoshi grain color sorter, with its advanced technology and excellent quality, has become an important tool for production and processing companies to improve production efficiency and ensure grain quality. When choosing a grain color sorter, you can consider the Mihoshi brand products produced by Meixing Intelligent Technology Company, and choose the appropriate model and configuration according to your own needs to improve the quality and efficiency of agricultural production.

 

color sorter

Rice is one of the most important staple foods for people, and for most people, three meals a day revolve around rice. If the quality of rice is not up to standard, it will directly affect people's physical health, increase the demand for rice quality, and promote the continuous improvement of rice technology and equipment.

 

The rice entering the color sorter must not contain any crushed stones, metal materials, or other substances. This requires the installation of effective magnetic separators, high-efficiency vibrating screens, density grading stone removal machines, and other machines during the initial cleaning stage to remove as much residue as possible, reduce color particles and other components, relieve the pressure on the color sorter, fully utilize the initial cleaning function, and improve the working efficiency of the color sorter.

 

Rice enters the machine from the top hopper, and through the vibration of the vibrator device, the rice slides down the channel, accelerates its descent into the observation area of the sorting chamber, and passes between the sensor and the background plate. Under the action of the light source, the system generates output signals to drive the solenoid valve to blow out particles of different colors into the waste chamber of the receiving hopper according to the strength and color changes of the light, while the good rice continues to fall into the finished product chamber of the receiving hopper, thus achieving the purpose of selection. The beige color sorting machine can screen out rice grains with different colors, effectively improving rice quality, reducing rice loss, and lowering processing costs.

 

For consumers, only rice with good quality and no impurities can motivate them to purchase. Undoubtedly, rice production enterprises are facing challenges and need to 100% remove particles and impurities with different colors, such as coal slag, small glass, black rice grains, etc. The Meixing beige color sorter can fully meet these requirements.