Glue machine

Adhesive tape machines, machines and equipment used to produce tape or similar tape products. Due to the differences in the performance of different types of tape products, there are more types of tape machines. According to the tape base material, the nature of the coating liquid, and the processing requirements, the structure and configuration of the tape machine are often very different. The production process of tape is to apply glue (coating liquid) to the substrate, so it is usually called a coating machine in the industry.

Component

Coating

The key to the coating (system) processing technology is the coating method. There are hundreds of different coating methods used in various fields, indicating that each coating method has its own scope of application, and only the best coating method can be selected according to the characteristics of various products. (Therefore, claiming that a device can do any product is irresponsible and even deceptive.)

Coating classification

Coating methods are divided according to the type of control coating amount, usually divided into 4 types:

1. Self-metering coating, such as dip coating and forward and reverse roll coating.

2. Metering modification coating, such as doctor blade, air knife and metering roller coating.

3. Predicted amount coating, such as slit coating, gradient coating and curtain coating.

4. Mixed coating, that is, mixed use of various coating methods.

working principle

The work of the tape machine is divided into two parts, namely the printing and coating parts. In order to produce better products, the two parts have different work divisions.

print

Place the roll to be printed on the unwinding roller and start the machine. The corresponding mechanism is driven to rotate by the transmission device, and the printing plate roller and the printing rubber roller are laminated to realize the gravure printing, and then the natural drying or heating drying is carried out, and the winding roller is wound to complete the printing function.

Coating

Place the substrate to be coated on the unwinding roll, start the machine, and drive the corresponding mechanism to drive through the transmission device.

The belt conveyor adopts electric, coal and gas three drying integrated, electronic temperature control, stepless speed change, automatic counting, automatic deviation correction, gravure printing, advanced infrared heating, cooling and repressing and other high-tech. The production processes such as collection and unwinding, printing, coating, drying, hot air circulation, traction, slitting, and winding are completed in one machine.

dry

Drying (system) is an important part of the tape machine (coating machine). The effect of drying directly affects the performance of the product. Different products have different drying methods, the most common is hot air drying, microwave drying and infrared drying.

The drying system generally includes an oven, a fan, a heat exchanger and a filter. 1. Types of ovens, the most common are bridge arched drying tunnels, flat-plate and air-floating drying tunnels, etc.

2. The fan is generally a centrifugal fan. If the coating liquid contains Class A and B solvents, an explosion-proof fan must be used.

3. The heat exchanger needs to be determined according to the type of heat source, temperature and heating capacity.

4. Filters, select suitable filters due to different process requirements.

5. Solvent recovery system, which absorbs water vapor, toxic and harmful substances in the solvent to promote drying of the coating layer and reduce the emission of harmful substances.

transmission:

The transmission (system) mainly controls the speed and tension of the coating machine to make the coating machine run smoothly at a certain speed and evenly coat.

Speed control method

1. DC speed regulation, by changing the parameters of the motor or applying voltage, etc., to change the running speed of the motor. Including stepless speed regulation and stepwise speed regulation, upward and downward speed regulation, constant torque speed regulation and constant power speed regulation.

2. AC frequency conversion speed regulation, this method is the most widely used and cost-effective speed regulation method.

tension:

Tension (control)

1. Open-loop tension control, which indirectly controls the tension of the sheet circuit by controlling the torque of the motor, magnetic powder clutch, brake, etc.

2. Tension closed-loop control, using feedback devices such as tension sensors or floating rollers, adjust PID to correct motor speed and torque in real time to achieve higher tension accuracy.

Install:

1. The site for site selection and installation of the belt conveyor must be on a relatively flat hardened ground, because the belt conveyor requires a good environment when operating. It cannot be said that the ground is pitted, and the various parts of the operation are not coordinated, which makes the product produced Unqualified! All this needs to be considered.

2. Assemble the machine. Generally, the components of the belt conveyor are separated. Before installation, after the site is selected, place the front and rear middle racks on a level ground to maintain a uniform horizontal line! To maintain stable operation.

Pipe cutting machine, auxiliary accessories, power distribution cabinet. Auxiliary body can be selected according to different production needs: multi-color printing machine, slitting machine, rewinding machine, beating machine, pipe drawing machine, etc. In order to produce better products, a pipe cutting machine is recommended.

Adjustment:

There are precautions for installation and adjustment

1. Install the front frame, middle frame, and rear frame on the reserved plane in the predetermined position, and align it horizontally to firmly contact with the foundation, so that the center line of the frame is in a straight line in the longitudinal direction; The rack shifts, shakes, etc. to avoid accidents.

2. Install the configured oven on each rack in sequence, and fix it with bolts; keep the oven and rack level and stable.

3. Install the power distribution cabinet next to the front rack or in a place that is convenient for operation, connect each circuit according to the instructions, and finally connect the power supply (be sure to disconnect the power supply when wiring).

4. Install each internal configuration part according to the set position, adjust each media roll, unwind roll, rewind roll, etc. horizontally, the axes are parallel to each other and perpendicular to the direction of tape movement. During the installation process, the smooth surface of the media should not be scratched, and the correct installation of the various components should be maintained.

5. Install the gears, pulleys, and sprocket wheels, and try to rotate them properly to ensure that the rotation is flexible and there is no abnormality and no obstruction; and add corresponding lubricating oil to the chain, reducer, etc.

6. Check whether there are any omissions in the installation, and ensure that the heater, thermal sensor, and transmission media are installed; check whether the circuits are connected correctly, and the wires are not leaking; whether the entire body is offset incorrectly, and the oven is separated.

7. After the installation is correct, start the test machine one by one. If there is any abnormality, stop it for inspection and adjustment; start production after confirmation (please pay attention to personal safety and machine safety during operation).

effect:

The composition of the entire machine, and the role of each component

Unwinding device-responsible for the unwinding and winding of the parent roll, and can be equipped with tension control.

Printing part-single-color and two-color printing can be configured.

Gluing part-consists of a squeegee roller and a squeegee roller, used to coat the glue onto the substrate.

Oven part-to dry the glue.

Slitting part-according to the need to cut the substrate after the glue.

Rewinding part-rewinding the tape after slitting, the length of the rewinding can be determined according to the needs, and it can also be rewinding large rolls.

Transmission part-sub-chain drive and gearbox drive. The average speed of the chain drive is equal, but there is an instantaneous speed, which is not suitable for the business with high registration accuracy.

Slitting machine-slitting the tape machine

Pipe stretcher-unload and load the paper tube on the reel by hydraulic pressure

Automatic pipe cutting machine-slitting the paper tube

Rewinding machine-sort out some defective tapes (especially the ones that are not neatly wound) to reduce the defective rate

set up:

Temperature: During heating and drying, the drying temperature of BOPP film can be set at 60-70℃, while in natural drying, a fan can be used to accelerate the air circulation on the surface of the printing material to increase the drying speed. Tension: The machine generally has four levels of tension control, namely unwinding tension, feeding tension, traction tension, and rewinding tension. The more stable Mr. Zhang's tension is, the more stable the generation and operation will be, and the better the quality will be. However, the tension of each zone in the production process is mainly based on the operator's personal experience in the production process; the tension can be appropriately increased for materials with poor straightness and flatness.

Coating parameters:

Drying temperature: The higher the drying temperature, the faster the water molecules in the emulsion pressure-sensitive adhesive evaporate. Many pressure-sensitive adhesives can undergo cross-linking reactions at the same time to cause changes in the viscosity of the pressure-sensitive adhesive. However, the higher the temperature, the greater the impact; when the machine is shut down to change rolls, the film in the oven is likely to shrink and deform due to the long residence time at high temperature; for equipment that is coated and slitted at the same time, its actual drying The temperature can be set at 60-90℃.