laminating machine——SWFM-520F

What are the principal machine parameters of this machine?

The model is SWFM520F. It's a sizeable hydraulic auto-cut laminating machine with oil heating, pulling off and embossing. The max paper size is 485mm, and the operating speed is 0-25m/min. Furthermore, the laminating temperature is 50-120℃. Besides, the total power is 4kW, and the dimensions(L×W×H) are 2.1×0.87×1.6m. At last, the pressure is 3~6MPa.

What is the distinction between the instant lamination method and pre-coated lamination?

There are many kinds of laminating machines, which is a general term for many industries. Laminating machines are generally paper printed product lamination for the digital fast printing graphic industry. According to the lamination process, the lamination material lamination method is divided into many different laminating machines. Hence, there are cold laminating machines, hot laminating machines, vacuum laminating machines, coating laminating machines, pre-coated laminating machines, water-based laminating machines, and oil-based laminating machines, plate flat laminating machines, curved laminating machine, etc.

1. The coating film process is to coat the adhesive on the film first and then hot-press it, which is currently widely used in China. In the past ten years, manufacturers all over the country engaged in compound production using the glue coating process; whether it is paper-plastic compounding or plastic-plastic compounding, there have been sudden accidents in which the glue tray catches fire when the glue is applied to the BOPP film.

2. pre-coated film The pre-coated film pre-coats the adhesive on the plastic film. After drying and winding, it is hot-pressed on the laminating equipment of the adhesive-free coating device to complete the process. Lamination process. The pre-coated film process dramatically simplifies the film-coating process because the film-coating equipment does not require an adhesive heating and drying system, and the operation is very convenient. To improve the working conditions, more importantly, it completely avoids the occurrence of lamination failures such as bubbles and delamination, and the transparency of lamination products is exceptionally high, which has broad application prospects and promotion value.

Due to the limitation of process technology, production equipment, and raw materials, the pre-coated films produced in China still have quality defects. Most of the pre-coated movies made in China are hot-melt adhesive pre-coated films. The colloid is dissolved with an organic solvent by a process similar to the coating film, and the rubber roller is coated on the substrate film with a concave anilox roller. Therefore, there is insufficient solvent volatilization, and a peculiar smell is generated during operation and use. After coating, the solvent At the same time, because the hot melt adhesive is mixed with several polymer materials, during the use process, poor temperature control will cause the degradation and cross-linking of the polymer in the hot melt adhesive, making The surface quality of the coating is not good; some pre-coated colloids are easy to bond with the outer surface of the substrate, resulting in poor winding; because the adhesive layer is thin and the surface of the adhesive layer has not been activated, it is easy to produce insufficient adhesion to the printed matter, etc. defect. Since the hot melt adhesive is made of several materials, the transparency after lamination is significantly worse than that of the low-temperature pure resin pre-coated film.

Generally speaking, compared with ordinary paper printed products, laminated products have the following characteristics: the surface is smoother and brighter, and the gloss is higher; the color of the pictures and texts is more vivid and has a three-dimensional sense; the tear resistance, abrasion resistance, and resistance High folding performance; good waterproof, anti-fouling, chemical corrosion resistance and other properties.

What is water-based lamination?

The filming process can be divided into dry filming, wet filming, and oily filming. According to the nature of the lamination adhesive, it can be divided into water-based lamination, oily lamination, and pre-coated lamination. The raw materials and equipment used in the lamination process can be divided into the coating and pre-coated processes.

Water-based lamination is a way to process the printed matter's surface, improve the printed matter's surface gloss and strength, and enhance the aesthetic effect. Effective means. Therefore, to measure the quality of the film, it is necessary to examine its brightness, power, and adhesion of the film. The development of the water-based laminating machine has made the water-based laminating process widely popularized and applied. Water-based wet laminating is favored by customers for its high strength, high quality, easy recycling, and no pollution.

What is curved lamination?

The curved coating is a brand-new transfer technology. General traditional or transfer printing is helpless when encountering workpieces with complex shapes. Still, the surface coating is not only easy to deal with such problems. Still, it can also be applied to different materials and give the product a lively pattern and color, which significantly improves its added value. This technology was a revolutionary new transfer printing technology in the 20th century.

The curved surface coating film is a unique chemically treated film. After printing a specific color pattern, it is sent flat to the water's surface. The color pattern is evenly transcribed on the product's surface using the action of water pressure. The film dissolves automatically. After cleaning and drying, a layer of transparent protective coating is applied, and the product can present a completely different visual effect.

Application industries of curved surface coating: 1. Automotive supplies: instrument panels, control panels, tissue boxes, teacup holders, tape racks, rearview mirror frames, handlebars, car locks, etc.; 2. Electronic products: telephones, pagers, video recorders, TVs, air conditioners, speakers, remote controls, mice, clocks, etc.; 3. Room supplies: sofas, coffee tables, kitchen frames, chandeliers, ashtrays, vases, etc.; 4. Daily necessities: glasses, glasses cases, pens, Pen holder, desk calendar, art frame, racket, gift box, cosmetic box, etc.; 5. Indoor building materials: doors and windows, floors, wall panels, etc.

The lamination process can be divided into cold (cold pressing) lamination, hot (hot active) lamination, and liquid lamination according to cold and heat, pressure conditions, and material requirements. Hot lamination technology refers to heating and activating the pre-coated adhesive on the film and bonding the film and the printed product together. Cold lamination is pressurizing and directly relies on the adhesive. The film is related to print. These methods can produce various memorable films such as UV protective film, waterproof film, and anti-friction film. Recently, an emerging technology called ¨Liquid Lamination¨ has emerged, which is to apply a layer of the film directly on the product's surface with a brush, spray gun, roller, or particular laminating machine. This method is simple to operate and low cost, but it is not mature enough.

What are the characteristics of laminating machine?

1. High efficiency and low cost. The automatic laminating machine can attach 1000pcs/h in one hour, and the attaching efficiency is at least three times that of labor. The labor cost is higher, and the long-term price of the machine is lower. Manual management is complex, and the device only needs to be maintained regularly.

2. High precision and no bubble film. If the attachment accuracy of an employee is within ±1mm, the attachment accuracy of a laminating machine is within ±0.5. Manual attachment may sometimes cause damage to the film material and unnecessary waste due to the extension of bubbles, wrinkles, misalignment, skew, and other reasons, but the machine will not. And in the case of high attachment accuracy, it can give consumers an excellent first impression of an appearance and improve customer satisfaction with the product.

3. Stable performance. The high-strength body can ensure the service life and stability of the equipment. The whole machine runs fast, smoothly, and has low noise. The human-machine interface is adopted to make the operation more humanized and safe. When an abnormality occurs, it is safer to use. The electronic control system comprises PLC + high-performance subdivision stepper motor + optical fiber sensor. The equipment is stable and supports long-term work.

What are the common faults of lamination?

1. Wrinkle phenomenon during lamination

①The plastic film is wrinkled. The main reason is that during the conveying process of the film, the film tension caused by improper traction is large or small, which causes the film to wrinkle in the oblique, longitudinal and transverse directions.

②The paper is wrinkled. The main reason is that when the form passes through the hot pressing machine, it does not receive heat and pressure smoothly and naturally, and there are longitudinal or oblique wrinkles, most of which appear at the trailing tip. There are also problems of uneven paper and uneven or excessive moisture content.

③ The report and film are wrinkled together. The plastic film and writing that have passed through the heat-pressing machine have longitudinal wrinkles at the trailing tip or on both sides of the center and outward.

2. The lamination product is curled

Central performance: When the paper-plastic composite product is cut, it bends in the film's direction and cannot be kept flat. In severe cases, it will automatically curve into a cylindrical shape.

Main reason:

①The coated paper is too thin;

②The article has high water content and high humidity;

③ The temperature in the operation workshop is low;

④ loose paper and poor flatness;

⑤ The pressure is too high, the temperature is high, and the time is extended when the film is covered.

3. The edge of the film is rough, the film is out, and the crack is

Paper-plastic composite products require that the plastic film wholly and thoroughly cover the paper printed matter, and the edges are smooth, without cracks and film. The main reasons are problems with the film quality, unevenness, and the report being uneven before and after laminating and laminating. Adjust the side stop gauge plate during operation to make the paper and film convey neatly.

How do we prevent the problem of local film formation during the rolling line and unevenness of the coated product?

There are several reasons for the local filming problem with rolling lines or bumps. The final reason is the insufficient bonding between the pre-coated film and the printed matter. Therefore, doing the test in advance is an essential means of avoiding problems after many laminations. Of course, it is necessary to accumulate some work experience. Therefore, check the ink's condition according to the instruction manual's contents for the pre-coated film. The critical point is that the ink must be thoroughly dried, especially in the season with low ambient temperature; the ink often appears fake dry. The phenomenon, a small amount of solvent remaining in ink will be volatilized during the heating process of the film, resulting in insufficient bonding force between the pre-coated film and the printed matter and the phenomenon of filming during rolling and unevenness. If the expired pre-coated film is used, the performance of the adhesive layer would be aging, which will also lead to insufficient adhesion and cause filming on the rolling line. Therefore, to prevent the filming problem of the rolling line, it is necessary to consider the quality of the ink, paper, laminating process, and the pre-coated film itself.

What is the future development?

A small link in commodity production cannot be ignored. The quality of the attachment of commodities will affect consumers' perception of commodity brands. The use of this automatic laminating machine solves the problem of commodity attachment. In the modern market, every link of commodity production is undergoing modern upgrading and progress, and the filming of commodities is also the same, and it is also necessary to improve efficiency. Those who have made progress in the past must not be held back. For consumers, when choosing products in the market, one of them is undoubtedly very important, that is, whether the brand of this product is relatively well-known, if it is relatively well-known, then consumers will tend to choose The product, in turn, consumers may go to buy other brands. Therefore, the brand effect is very important for manufacturers of automatic laminating machines.