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Carton factory how to choose the right paste machine
Dec 15, 2017

An important and often overlooked factor for all efficient and productive corrugated box makers is pasting machines. Like the tile line, pasta machines have also been updated rapidly over the years. Because the paste machine technical performance and the speed and performance of the line is closely related. Carton plants need efficient pasting machines that save raw materials and labor.

 

Nearly 10 to 15 years, high-speed automatic cutting paste making machine more and more favored by the carton factory. High-speed shear mixing system can improve paste machine performance, reduce costs. Now, tile lines run faster and faster, carton manufacturers urgently need more cost-effective paste and adhesive to meet the operation requirements of these tiles. Old pasta machine operator management and control, each batch of paste production, need to add raw materials. Finally, the new paste-making approach is also a general trend in the marketplace - producing ever-higher-performance products at a lower cost is an everlasting law in the marketplace.

 

Therefore, high-speed automatic pasting machine came into being. Following Stein Hall's major steps in paste making, a more stable paste can be produced to meet the high-speed operation needs of the new tile line. These modern systems reduce labor costs and produce a paste that is suitable for the speed of the line, without having to modify the recipe for primary mixing.

 

Now, corrugated box manufacturers are pursuing high-speed low-cost production, but there are some new factors that affect the paste machine. Carton plants should consider the quality of base paper used (increased recycled fiber), environmental concerns and increasingly prominent safety issues.

 

Affect the design of the factors

1. Line speed

2. Paper quality

3. Environmental issues

4. Security issues

 

Let's take a look at how these four issues affect the new paste system or upgrade system. Here, only the traditional Stein Hall paste system as an example.

 

Today, the production of tile lines can reach 350 m / min. The increased speed requires not only some adjustments to the basic formulation of the paste (eg low gel point) but also the use of some liquid additives; the adjustment of the formulation to make the paste more suitable for the application of the size roller; Production capacity; and strict control of viscosity. Therefore, we made the following suggestions to make the paste more suitable for the operation of high-speed tile lines.

Liquid additive

During pasteurisation, in the primary and secondary pasteurisation stages, the mixing module and the program settings should allow the addition of 3 to 4 liquid additives.

2. Water temperature preheat system

The system normally includes a 300 gallon to 500 gallon water tank with automatic heating (steaming) to warm the water and speed up production.

3. Larger pumps and pipes

Can shorten the paste into the storage tank time, speed up the production speed.

4. Glue line with plastic storage tanks need to have heating and cooling functions

The use of a glue tank ensures that the temperature and viscosity of the paste are in the optimum range. These tanks also enhance the wet strength of the paste.

5. Dry additive system

Wadding speed faster and faster, sizing paste on the runnability of the key. Stein Hall pasting method can produce a thick paste (fiber longer). However, if the equipment runs very fast, the fiber length will affect the operation of the equipment. Some new additives / fluid modifiers can be used to reduce the particle concentration. These methods help to improve the paste properties and make the fibers shorter.

6 closed paste circle

The paste temperature and viscosity can be controlled within the optimum range.

 

Base paper quality

 

The quality of the paper on the tile line affects the operation of the tile line. Recycled paper fibers are getting higher and higher in base paper production and customers are increasingly demanding finished paperboards - a test of the board's bonding quality. The initial stage of Stein Hall pasteurisation will complete the base paper bonding. The paste penetrates into the cardboard to achieve a firm bond. For some base paper, the time it takes for the moisture in the paste to penetrate even needs hourglass measurements. If the infiltration time is too long, the water evaporates before it penetrates, so the paste naturally can not penetrate into the paper. Nowadays, the speed of tile line is increasing, and correspondingly, the time of penetration of the paste should also be shortened.

 

Paper quality will paste machine design what kind of impact? What are the requirements? What should we take?

 

1. Adjust the paste conveyor system

At a minimum, make sure that the paste maker is equipped with a super-bellows system or bellows pump as the quality of the base paper and the line speed are testing the quality of the paste.

2. Make sure the shear rate during primary mixing

One way to speed up the permeability is to adjust the caustic soda to borax ratio in the paste recipe. Caustic soda enhances the properties of paper fibers and helps the pastes penetrate the paperboard. However, if the caustic soda ratio is too high, then the viscosity of the paste during the primary agitation will be too high and will need to be reprocessed to achieve the proper paste viscosity.

3. Add time for primary and secondary mixing

Today, trends in the industry of paste formulations are: fewer and fewer particles (more and more water). On the face of it, this seems to be a step backwards. Base paper quality is changing, the more particles of paste help to complete the bonding process. In practice, however, moisture is the carrier through which the paste penetrates the base paper so that the more moisture, the more favorable it is to the bonding process. Reducing the amount of particles in the secondary agitation stage and increasing the amount of particles in the primary stage and adding the additive will reduce the amount of particles (22% -24%) while improving paste performance.

 

Environmental issues

 

All carton factories are concerned about sustainability and environmental issues. Reducing waste water formulations is one way to protect the environment. Production of paste in the process, will produce a lot of waste water. Treated wastewater back into the paste through the pipeline between the paste, re-use. Typically, the treated wastewater is used only for the secondary agitation phase, leaving the paste in the proper consistency. However, many carton plants in the primary mixing stage and secondary mixing stage will use the wastewater, the use of good results. The price of water is rising, and the use of waste water helps to save costs.

So, the use of waste water and pasta machine design what is the relationship?

 

Waste water tank

Waste water tank should be placed in paste between the system, with steam injection function, preheat moisture. This is very similar to the blend tank mentioned earlier. If the temperature of the waste water is too high (above 80ºF), you need cooling.

2. Use the program settings to manage the paste production

Procedures should be set to manage the production of paste batches, if necessary, can automatically switch to fresh water in the production process.

Recycled paper fibers are getting higher and higher in base paper production and customers are increasingly demanding finished paperboards - a test of the board's bonding quality.

 

safe question

 

All makers of pasters are paying special attention to safety issues. Here, let's talk about the new security regulations and the possible changes.

1. New NFPA Explosion Protection System Guide

Paste particles are flammable substances. The new guidelines stipulate that this system must be handled with great care. The United States paste maker manufacturers have already learned about this new guide. Air locks must be periodically checked for such devices to ensure safe operation.

2. Avoid using borax powder

Borax powder on the human lungs have irritation. In fact, Europe has introduced a new rule: Only use a certain amount of borax. Therefore, do not use the traditional borax hopper to prevent dust flying. Instead, use a filter with dust collection or use liquid borax. Europe has already begun to implement such a regulation, the United States is also about to be implemented.

Borax delivery skills

Typically, borax is 20 kg / bag and is manually placed in the borax hopper of the mixing table. If each bag borax is too heavy, you can not manually put. At this time, need to use some lifting equipment. To solve this problem, some carton factories now place larger hoppers on the ground, when this still needs to be done by hand. In fact, you can use 900 kg / bag of borax, and then use screw conveyor feeding.

4. Caustic soda delivery and storage

Caustic soda is highly corrosive, and care must be taken when using and storing. Therefore, the design of the caustic soda system must be extra careful, to ensure the safety of employees, in line with the relevant local regulations and requirements. For example, in some places, the use of double walls can not meet the safety requirements and barriers must be used. There are also differences in spill prevention requirements everywhere.


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