Working principle of a double-sided coating machine
Jul 31, 2023
The double-sided coater is used for the coating production of BOPP sealing tape. Apply a layer of glue, paint, or ink with specific functions to the rolled substrate, let it dry, and roll it up. The use of a special high-speed coating head can effectively reduce the generation of air bubbles. The winding and unwinding of the coating machine are equipped with a full-speed automatic film splicing mechanism and closed-loop automatic tension control.
The working process of the double-sided coating machine: rolled substrates, such as paper, cloth, leather, aluminum foil, plastic film, etc. It is to apply a layer of glue, paint, or ink with specific functions, then let it dry and roll it up.
It is suitable for the production of soft substrates such as PVC or PE film. Simply put, glue is applied to the film. Specifically including gluing, drying, winding, and tension control. The film can be PVC, PE, PET, or some paper.
The double-sided coating machine is usually controlled and operated by adjusting the angle of the scraper. However, the combination scraper complements this without changing the angle of the scraper. Only change the pressure load of the doctor blade to control the coating amount.
The double-sided coater is used for the coating production of BOPP sealing tape. Apply a layer of glue, paint, or ink with specific functions to the rolled substrate, let it dry, and roll it up. The use of a special high-speed coating head can effectively reduce the generation of air bubbles. The winding and unwinding of the coating machine are equipped with a full-speed automatic film splicing mechanism and closed-loop automatic tension control.
The working process of the double-sided coating machine: rolled substrates, such as paper, cloth, leather, aluminum foil, plastic film, etc. It is to apply a layer of glue, paint, or ink with specific functions, then let it dry and roll it up.
It is suitable for the production of soft substrates such as PVC or PE film. Simply put, glue is applied to the film. Specifically including gluing, drying, winding, and tension control. The film can be PVC, PE, PET, or some paper.
The double-sided coating machine is usually controlled and operated by adjusting the angle of the scraper. However, the combination scraper complements this without changing the angle of the scraper. Only change the pressure load of the doctor blade to control the coating amount.
This will help prevent knife streaks or coat quality issues when changing coat weights. This is especially important in low-basis-weight coatings. To vary the pressure load on top of the scraper, the clamping beam with the scraper is moved inwards or outwards on guide rails. But the position where the scraper compresses the support remains unchanged.
A double-sided coating machine is suitable for coating shoe materials, the electronics industry, BOPP sealing tape, sponges, EVA, PE, PET, cloth, etc.
The working principle of the double-sided coating machine is to coat a layer of glue, paint, or ink with specific functions on the rolled substrate (such as paper, cloth, leather, aluminum foil, plastic film, etc.), dry, and then roll up. The use of a special high-speed coating head can effectively reduce the generation of air bubbles. Unwinding and unwinding are equipped with full-speed automatic film splicing mechanisms, double-station or single-station tension, closed-loop automatic control, and other devices.
The double-sided coating machine generally includes: coating, drying, hot pressing, cooling,... and other units.
coating unit
According to different machine designs, there are roller coatings and doctor blade coatings for coating and gluing. The glued surface is also different for the top, bottom of the cloth, or the top of the film. Different glue application methods make the glue penetrate into the film on the substrate differently, and of course the follow-up effect will also be different. In addition, whether there are lines or patterns on the coating wheel will also affect the difficulty of gluing and the form of gluing (full coating, spot coating, etc.). Coated wheels with special textures and corresponding glue can even compound high-performance finished products such as air permeability and a super soft feel.
drying device
Whether an oven is available, the drying method (hot air circulation or infrared-assisted) also has different designs depending on the selected model and roller or doctor blade coating. The volatilization speed of the glue is closely related to the drying conditions of the machine, so how to adjust to the appropriate temperature required by the material is very important to making the glue stick well.
heat press unit
The size of the hot pressing wheel, the surface temperature, and the pressing time are related to the volatilization efficiency of the residual solvent, the activation degree of the glue, and the bonding effect.
cooling device
Before curling, the composite product is cooled by the cooling wheel, which can promote the crystallization of the glue, improve the initial adhesion, and avoid the displacement of the bonded material during the winding process.
This will help prevent knife streaks or coat quality issues when changing coat weights. This is especially important in low-basis-weight coatings. To vary the pressure load on top of the scraper, the clamping beam with the scraper is moved inwards or outwards on guide rails. But the position where the scraper compresses the support remains unchanged.
A double-sided coating machine is suitable for coating shoe materials, the electronics industry, BOPP sealing tape, sponges, EVA, PE, PET, cloth, etc.
The working principle of the double-sided coating machine is to coat a layer of glue, paint, or ink with specific functions on the rolled substrate (such as paper, cloth, leather, aluminum foil, plastic film, etc.), dry, and then roll up. The use of a special high-speed coating head can effectively reduce the generation of air bubbles. Unwinding and unwinding are equipped with full-speed automatic film splicing mechanisms, double-station or single-station tension, closed-loop automatic control, and other devices.
The double-sided coating machine generally includes: coating, drying, hot pressing, cooling,... and other units.
coating unit
According to different machine designs, there are roller coatings and doctor blade coatings for coating and gluing. The glued surface is also different for the top, bottom of the cloth, or the top of the film. Different glue application methods make the glue penetrate into the film on the substrate differently, and of course the follow-up effect will also be different. In addition, whether there are lines or patterns on the coating wheel will also affect the difficulty of gluing and the form of gluing (full coating, spot coating, etc.). Coated wheels with special textures and corresponding glue can even compound high-performance finished products such as air permeability and a super soft feel.
drying device
Whether an oven is available, the drying method (hot air circulation or infrared-assisted) also has different designs depending on the selected model and roller or doctor blade coating. The volatilization speed of the glue is closely related to the drying conditions of the machine, so how to adjust to the appropriate temperature required by the material is very important to making the glue stick well.
heat press unit
The size of the hot pressing wheel, the surface temperature, and the pressing time are related to the volatilization efficiency of the residual solvent, the activation degree of the glue, and the bonding effect.
cooling device
Before curling, the composite product is cooled by the cooling wheel, which can promote the crystallization of the glue, improve the initial adhesion, and avoid the displacement of the bonded material during the winding process.
