Product Description

A3 paper refers to the international standard A3 paper, which is 297mm×420mm in size; the size of A4 paper is 210mm×297mm.

Machine name	Pneumatic hot stamping machine
pressure	3 tons
Power	1.5KW	2.9KW
Power supply	220V/50HZ
Temperature	0-400℃
Speed	10-50 times/min
Workbench size	280*350mm	350*450mm
Heating plate size	200*300mm	300*400mm
Lamination height	100mm
Net weight
Gross weight
Machine size	750*650*1700mm
PLYWOOD SIZE	800x800*1750mm

 

 

 

 

 

 

 

 

 

 

 

 

Hot stamping, commonly known as "hot stamping", refers to the process of hot stamping text and patterns of materials such as colored foil on the cover of a hardcover book or on the back of the book, or hot stamping various convex and concave book titles or patterns. More specifically, it is the process of transferring hot stamping materials or hot stamping patterns to the objects being stamped by hot stamping methods on paper, cardboard, fabrics, coatings, etc. Hot stamping processing for binding is generally more common on the cover, and its forms are various, such as hot stamping of single material, hot stamping without hot stamping material, mixed hot stamping, hot stamping, etc. It has a long history in China. However, the rapid development and widespread application of hot stamping technology have only been in the past decade. Hot stamping technology has a wide range of applications, such as hot stamping of paper products, hot stamping of textiles, hot stamping of decorative materials, hot stamping of plastic products, etc. Hot stamping is an important means of surface decoration of plastic parts, and it is also a common decorative process for household appliances and consumer electronic products. It is to heat the hot stamping head to make the metal or coating layer on the hot stamping film press hot stamping to the surface of the workpiece to achieve the purpose of decoration or marking. The four basic conditions of hot stamping process: hot stamping head includes hot stamping template, heater, and pressure transmission mechanism.
Hot stamping film determines the decorative effects such as color, graphics, etc., and the equipment has film transmission and winding devices. Hot stamping fixture (mold, pad head) includes workbench and transmission device. Hot stamping methods include flat hot stamping and rolling hot stamping. Flat hot stamping includes small arc curved surface, folded surface and inclined surface hot stamping. Its basic forms are "flat hot stamping" and "round hot stamping"; rolling hot stamping includes flat hot stamping, circumferential hot stamping and non-circular surface circumferential hot stamping. Its basic forms are "flat hot stamping round" and "round hot stamping round".
Development process
Flat hot stamping, as the name suggests, refers to a stamping die with a flat reference surface, hot stamping on a flat workpiece or a part of the workpiece (flat hot stamping). This type of stamp can be a raised image or text, which is hot stamped on a flat surface; or it can be a flat silicone plate, which is hot stamped on a raised image or text.
Rolling, the stamping part is a heated silicone rubber roller, which can be rolled on a flat surface (round hot stamping flat), or on a circular arc surface (round hot stamping round). If equipped with a special servo mechanism, it can also be rolled around the shell of a TV shell. There is another type of rolling equipment. It is different from the former. It still uses a flat plate for hot stamping. The workpiece is cylindrical. When it is pressed, it rolls and heats forward to achieve the purpose of hot stamping on the circumference. This is "flat hot stamping round". Before the 1980s, most of the hot stamping equipment in China was homemade by hot stamping users. In the early 1980s, most of the flat ironing machines and rolling machines introduced were from Japan's Ohira (Navidas), West Germany's Kurz, and Hong Kong. After the 1980s, domestic manufacturers gradually increased, and now it has become a major category of special printing equipment, not only meeting the needs of the domestic market, but also exporting.
The current hot stamping is different from the past hot stamping. The quality has been greatly improved. The surface is very smooth and flat, the lines are straight, the edges are sharp, and the edges are not collapsed. It shows modern finishing technology and has a modern feel. There are also many varieties of hot stamping foils, including bright gold, bright silver, sub-gold, sub-silver, brush patterns, chrome foil, pigment foil, etc., with good appearance decoration effects. Hot stamping labels are used on modern home appliances and instruments.
Principle:
The essence of hot stamping is transfer, which is a process of transferring the pattern on the electroplated aluminum to the substrate through the action of heat and pressure. When the printing plate is heated to a certain degree with the attached electric heating base, it is pressed against the paper through the electroplated aluminum film, and the glue layer, metal aluminum layer and color layer attached to the polyester film are transferred to the paper by the action of temperature and pressure.
Hot stamping materials
According to the material type, it can be divided into: electrochemical aluminum hot stamping, color foil hot stamping, color sheet hot stamping, metal foil hot stamping and other hot stamping foil hot stamping. The following focuses on the hot stamping of electrochemical aluminum materials. Electrochemical aluminum foil is a hot stamping material made by vacuum evaporating a layer of metal foil on a film base.
① The first layer is the base film layer, also known as the base layer, which supports the other layers. The thickness is 12, 16, 18, 20, 25μ polyester film or polyester, etc.
② The second layer is the isolation layer (detachment layer), which is convenient for the separation of the base film and the electrochemical aluminum foil during hot stamping.
③ The third layer is the dyeing layer (protective layer): it provides a variety of color effects and protects the aluminum layer at the same time.
④ The fourth layer is the aluminum plating layer: it reflects light and presents a metallic luster. It adopts the method of vacuum aluminum plating. The specific principle is to place the film coated with colorant in the vacuum chamber of the vacuum continuous aluminum plating machine. Under a certain vacuum degree, the aluminum wire is melted and continuously evaporated to the color layer of the film through resistance heating, thus forming an aluminum plating layer.
⑤ The fifth layer is the adhesive layer, which adheres the aluminum layer to paper and other substrates. Electrochemical aluminum foil is mainly gold and silver, with gorgeous beauty, bright color, crystal clear, easy to use and other characteristics. It is suitable for hot stamping on paper, plastic, leather, coated fabrics, plexiglass, plastic and other materials. It is the most commonly used material for modern hot stamping.

Hot stamping equipment
The machine that can transfer the electrochemical aluminum foil hot stamping material to the printed matter through heat pressing is called a hot stamping machine.
1. Types and characteristics of hot stamping machines
① According to the hot stamping method, it is divided into:
● Flat-pressed flat, its hot stamping method is plane to plane.
Figure 5 Flat-pressed flat hot stamping method
● Round-pressed flat, its hot stamping method is hot stamping wheel to plane.
Figure 6 Round-pressed flat hot stamping method Figure 7 Round-pressed round hot stamping method
● Round-pressed round, its hot stamping method is hot stamping roller to pressure roller.
② According to the degree of automation: manual, semi-automatic, fully automatic.
③ According to the form of the whole machine: vertical, horizontal.
2. Basic structure of hot stamping machine
① The machine frame, including the external machine body and the paper feeding table, paper receiving table, etc.
② Hot stamping device, including electric heating plate, hot stamping plate, pressing plate and bottom plate. The electric heating plate is fixed on the printing plate platform, and a circuitous electric heating wire with a power of 600-2500W is installed in the electric heating plate; the hot stamping plate is a corroded copper plate or zinc plate, which is characterized by good heat transfer, not easy to deform, pressure resistance and wear resistance; the embossing plate is usually an aluminum plate or an iron plate; the bottom plate is an aluminum plate with a thickness of about 7mm, which is used to paste the hot stamping plate;
③ The electroplated aluminum conveying device consists of an unwinding shaft, a feeding roller and an auxiliary feeding roller, an electroplated aluminum winding roller and a feeding mechanism. The electroplated aluminum is installed on the unwinding shaft, and the electroplated aluminum after hot stamping passes between the two feeding rollers. The feeding mechanism composed of cams, connecting rods, ratchets, and ratchets drives the intermittent rotation of the feeding shaft. The intermittent rotation of the feeding roller drives the feeding of the electroplated aluminum. The feeding distance is set to the length of the hot stamping pattern. The electroplated aluminum after hot stamping is rolled on the winding roller.
Process flow
The process flow of hot stamping is mainly: preparation before hot stamping → plate installation → plate padding → determination of hot stamping process parameters → hot stamping test → sample signing → formal hot stamping
1. Preparation before hot stamping
The preparation before hot stamping mainly includes the inspection and selection of electroplated aluminum, the preparation of hot stamping plates and the inspection of hot stamping machines.
① Inspection and selection of electroplated aluminum. In addition to selecting the correct electroplated aluminum, attention should also be paid to the quality characteristics of the raw materials of electroplated aluminum, because the quality of electroplated aluminum materials directly affects the grade of the product. The inspection method is: check whether the model is correct; open the rewound electroplated aluminum, observe whether there are scratches, sand holes, wrinkles on the surface of the film, and whether the feel is flat; observe whether the brightness of the electroplated aluminum meets the requirements. The high-quality electroplated aluminum should reflect strong light and be crystal clear. It is generally determined by visual inspection.
The reasonable use of electroplated aluminum foil is of great significance to fully utilize materials, reduce waste and reduce costs. Therefore, it is necessary to consider the reasonable use and make the best use of materials in graphic design, which should be both beautiful and economical. Before hot stamping of electroplated aluminum, it is generally necessary to accurately calculate the materials used, and leave appropriate gaps according to the needs of the hot stamping area of ​​the product.
② Preparation of hot stamping plates. There are generally three types of plates for hot stamping electroplated aluminum: copper plates, zinc plates, and copper-zinc-plated plates. It is better to use copper plates because they are heat-resistant, have certain elasticity, are more durable than other plates, and have good hot stamping effects. The hot stamping plates used for hot stamping are generally processed externally. Before use, you should first check whether the plate has burrs, uneven edges and corners, unclear graphics and text, etc. The unqualified areas should be corroded and repaired before hot stamping.
2. Plate installation process
In plate installation, the prepared copper plate is installed on the base plate, and then the base plate is firmly fixed on the electric heating plate of the machine, and then the rules and pressure are adjusted appropriately. The copper plate should be fixed in a suitable position on the base plate, which should not only ensure good heating effect, but also facilitate manual operation and production. The base plate is heated by the electric heating plate and the heat is transferred to the printing plate for hot stamping. The copper plate is usually fixed by pasting or screwing, and the bottom plate is fixed on the electric heating plate with screws. When installing the copper plate, the positive film of the graphic plate can be used for positioning to ensure the location of the hot stamping.
3. Pad plate process
According to the hot stamping effect, pad the local unevenness and the bad hot stamping effect to make the pressure uniform everywhere.
4. Determination of hot stamping process parameters
① Hot stamping temperature. The hot stamping temperature is determined by the texture of the hot stamped object and the hot stamping form (such as plastic, paper, leather, etc.). The general settings are as follows: plate temperature: 100-150℃; machine temperature: 70-200℃. The machine temperature for paper hot stamping can be set according to different paper materials, different types of electroplated aluminum, different hot stamping pressures, and different hot stamping times. If the temperature is too high, the hot stamping will turn white or blue, the metal brightness will decrease, and there will be problems such as smearing and unclear graphics. If the temperature is too low, there will be problems such as poor hot stamping, broken strokes, weak adhesion, easy to wipe off, dullness, and flowery. When the hot stamping area is large, the temperature should be slightly higher; otherwise, it should be lower.
② Hot stamping pressure. The size of the hot stamping pressure should be determined according to the nature, thickness and hot stamping form of the object to be stamped, which is greater than the general printing pressure. The pressure should be large so that the plate is not smudged and the hot stamping marks are clear and bright; the pressure should be small so that it is firm and does not fall off or flowery. If two images with different sizes are hot stamped on the same plate, it is necessary to make the pressure per unit area equal. The larger the hot stamping area, the greater the hot stamping pressure should be, and vice versa.
③ Hot stamping time. In actual operation, the hot stamping time is usually regarded as a constant and is not easily changed. After fixing the hot stamping time, adjusting the hot stamping temperature and pressure will reduce variables, simplify operations, and make it easier to control quality. Generally speaking, changing the hot stamping time is only considered when conditions are special. In addition, if no hot stamping materials are used, and only when hot stamping concave and convex marks are made, the temperature can be appropriately reduced by 10% to 20%, and the time should be increased by 1 to 2 seconds.
The general order of determining the above three process parameters (temperature, pressure, and time) is: based on the characteristics of the object to be stamped and the suitability of the electroplated aluminum, the temperature and pressure are determined based on the printing plate area and the hot stamping time, and then the optimal pressure is determined to make the plate pressure moderate, flat, and uniform everywhere, and finally the optimal temperature is determined. From the perspective of hot stamping effect, hot stamping with relatively flat pressure, lower temperature and slightly slower speed is ideal. Because relatively flat pressure can make each point of the electroplated aluminum firmly bonded to the object to be stamped; on the basis of being able to fully bond, appropriately taking a lower temperature is conducive to maintaining the inherent metallic luster of the electroplated aluminum; the lower speed is to adapt to the slightly lower temperature.
5. Operator test hot stamping
After the preliminary work is ready, you can test hot stamping for several sheets. If the rules are not right, you can adjust the front rule or side rule appropriately; if it is because the quality requirements are not met, you can adjust the hot stamping temperature again or perform the pad operation. After meeting the requirements of the hot stamping quality regulations, you can take the test hot stamping samples and standard originals to the workshop supervisor for signing and production.
6. Supervisor signing the sample
The workshop supervisor confirms the qualified hot stamping after repeated comparisons and signs the sample, and the operator performs formal hot stamping.
7. Formal hot stamping production
During the formal production process, the operator must conduct self-inspection according to the production requirements, and the workshop supervisor and quality inspection personnel will also conduct random inspections at the machine side.
Common problems
1. Hot stamping is not done or the hot stamping is not firm
Hot stamping is not done or the hot stamping is not firm, that is, the anodized aluminum cannot be ideally transferred to the surface of the substrate or the anodized aluminum cannot adhere well to the substrate. The main reasons for hot stamping failure or weak hot stamping are: low hot stamping temperature; short hot stamping time; insufficient hot stamping pressure; base ink contains paraffin; the base ink of the printed product is thick and smooth; the base ink of the printed product dries too quickly and crystallizes, the electroplated aluminum model is not suitable, etc.
2. Hot stamping back-pull phenomenon
The so-called back-pull refers to the fact that after hot stamping, the electroplated aluminum foil layer is not firmly attached to the base ink layer of the printed product or the surface of white paper, but part or all of the base ink layer is pulled away by the electroplated aluminum.
Main reasons: the base ink layer is not dry; too much white ink is used in the base ink layer, which is easy to powderize. Solution: control the amount of dry oil added; mix the lightening agent with white ink; do not print ink on the hot stamping area.
3. Hot stamping pictures and texts are easily distorted
The pictures and texts are hairy, the strokes are missing, and the glossiness is poor. The hairiness of the handwriting is due to the low temperature; the missing strokes and broken lines are generally caused by the excessive tension of the electroplated aluminum coil or insufficient pressure; the poor glossiness is caused by the high temperature. Solution: According to the specific problem, adjust the temperature to the appropriate temperature and pressure relatively appropriately.
Modern technology
"Hot stamping"
Hot stamping technology refers to the use of a special metal stamping plate to transfer the stamping foil to the surface of the substrate by heating and pressurizing.
The advantages of hot stamping technology mainly include the following points.
⑴ Good quality, high precision, clear and sharp edges of the stamped image.
⑵ High surface gloss, bright and smooth stamping pattern.
⑶ A wide range of hot stamping foils are available, such as hot stamping foils of different colors, hot stamping foils with different gloss effects, and hot stamping foils suitable for different substrates.
⑷ Another outstanding advantage of hot stamping technology is that it can perform three-dimensional hot stamping. The three-dimensional hot stamping plate is made by computer numerical control engraving (CNC) so that the hot stamping processed images have obvious three-dimensional layers, forming a relief effect on the surface of the printed product and producing a strong visual impact. Three-dimensional hot stamping can give the packaging a unique touch.
It is precisely because of the above advantages of hot stamping that it has been favored by the majority of users and consumers and is widely used. However, the hot stamping process requires special equipment, heating devices, and the production of hot stamping plates. Therefore, obtaining high-quality hot stamping effects also means paying a higher cost.
The price of rotary hot stamping rollers is relatively high, accounting for a large proportion of the cost of hot stamping process, and is the main cost factor of hot stamping process. In the past five or six years, the price of hot stamping rollers has been greatly reduced, and the reduction is as high as 50%. In addition to reducing the cost of hot stamping rollers, hot stamping system suppliers have also challenged the speed limit of hot stamping. In the past, due to the limitation of hot stamping speed, most hot stamping work was done offline, but now the situation is very different. A few years ago, the hot stamping speed of the hot stamping machine could not reach 5,000 sheets/hour, but now both the platform hot stamping machine and the roller hot stamping machine can reach 7,500 to 12,000 sheets/hour. Of course, the speed of hot stamping is also related to the type of machine used. The continuous improvement of production speed has greatly reduced the cost of hot stamping.
"Cold stamping"
Cold stamping technology refers to the method of transferring the hot stamping foil to the substrate using UV adhesive. The cold stamping process can be divided into dry lamination cold stamping and wet lamination cold stamping.
The dry lamination cold stamping process is to cure the coated UV adhesive before hot stamping. 10 years ago, when the cold stamping technology just came out, the dry lamination cold stamping process was used, and its main process steps are as follows.
⑴ Print cationic UV adhesive on the roll substrate.
⑵ Cure the UV adhesive.
⑶ Use the pressure roller to compound the cold stamping foil with the printing material.
⑷ Peel off the excess stamping foil from the printing material, leaving only the required stamping image and text on the part coated with the adhesive.
It is worth noting that when using the dry lamination cold stamping process, the UV adhesive should be cured quickly, but it cannot be completely cured. It is necessary to ensure that it still has a certain viscosity after curing, so that it can be well bonded with the stamping foil.
The wet lamination cold stamping process is to first stamp and then cure the UV adhesive after applying the UV adhesive. The main process steps are as follows.
⑴ Print free radical UV adhesive on the roll printing material.
⑵ Compound cold stamping foil on the printing material.
⑶ Cure the free radical UV adhesive. Since the adhesive is sandwiched between the cold stamping foil and the printing material at this time, the UV light must pass through the stamping foil to reach the adhesive layer.
⑷ Peel off the hot stamping foil from the substrate and form hot stamping images on the substrate.
It should be noted that: first, the wet lamination cold stamping process uses free radical UV adhesive to replace the traditional cationic UV adhesive; second, the initial adhesion of the UV adhesive should be strong and it should no longer be sticky after curing; third, the aluminum coating of the hot stamping foil should have a certain light transmittance to ensure that the UV light can pass through and trigger the curing reaction of the UV adhesive.
The wet lamination cold stamping process can be used to hot stamp metal foil or holographic foil on the printing press, and its application range is becoming wider and wider. At present, many narrow-width carton and label flexographic printing machines have this online cold stamping capability.
1. Advantages and disadvantages of cold stamping technology
The outstanding advantages of cold stamping technology mainly include the following aspects.
⑴ No special hot stamping equipment is required, and the price of these equipment is usually relatively expensive.
⑵ No need to make metal hot stamping plates, ordinary flexible plates can be used, which not only has fast plate making speed and short cycle, but also reduces the production cost of hot stamping plates.
⑶ The hot stamping speed is fast, up to 450fpm.
⑷ No heating device is required, and it can save energy.
⑸ A photosensitive resin plate can be used to complete the hot stamping of halftone images and solid color blocks at the same time, that is, the halftone image and solid color blocks to be hot stamped can be made on the same hot stamping plate. Of course, just like printing halftone and solid color blocks on the same printing plate, the hot stamping effect and quality of both may be lost to a certain extent.
⑹ The hot stamping substrate has a wide range of applications, and can also be hot stamped on heat-sensitive materials, plastic films, and in-mold labels.
However, cold hot stamping technology also has certain shortcomings, mainly including the following two points.
⑴ Cold hot stamping images and texts usually require lamination or glazing for secondary processing and protection, which increases the hot stamping cost and process complexity.
⑵ The high viscosity adhesive applied has poor leveling and is not smooth, which causes diffuse reflection on the surface of the cold stamping foil, affecting the color and gloss of the stamped image and text, thereby reducing the aesthetics of the product.
Mr. J. Michael Rivera, Deputy General Manager of Sales at AMAGIC Horlogrphics, said that although the cold stamping process cannot achieve the high precision and high definition of the hot stamping process, the cold stamping technology can bring many advantages to flexographic printers, including: less initial investment in equipment, lower platemaking costs, faster stamping speed, can be completed online on the printing press, and can be stamped on materials that are not suitable for hot stamping (such as films without a base, PET and plastic bags, etc.).
On films and non-absorbent paper materials, cold stamping technology can achieve the best stamping effect. On the contrary, when cold stamping is performed on porous materials with strong permeability, the effect is not very ideal. However, Mr. Rivera pointed out that some AMAGIC customers have stamped on Raflatac Raflasilk matte PSA materials, and the feedback results are also quite good. Some customers can also achieve better cold stamping effects by applying primer and glue on matte paper materials.
Currently, cold stamping technology has become a strong competitor to hot stamping technology, and cold stamping technology is expanding from narrow-width flexographic printing to other printing processes, such as wide-width flexographic printing, letterpress, web offset printing and sheet-fed offset printing. For example, at Drupa 2004, the Roland 700 sheet-fed offset press equipped with Manroland's new Prindor InLine cold stamping device was exhibited.Cold stamping technology provides new opportunities for printing companies. Its biggest advantage is that it requires little investment, or even no investment at all. Another outstanding advantage is its high cost-effectiveness, which is also the biggest selling point of cold stamping technology. As an industry insider said: "For customers, cold stamping technology has a high cost-effectiveness, can help customers increase the added value of products, and is very economical." In addition, since cold stamping technology does not require the production of expensive stamping plates, it is very suitable for short-run jobs, labels and proofing production with low quality requirements. However, compared with hot stamping technology, cold stamping technology still has certain defects in quality and needs to be further improved. Therefore, cold stamping technology is not very suitable for the processing of high-quality packaging and label products.
By the way, although gold and silver ink printing can also achieve a metallic luster decorative effect similar to hot stamping, and gold and silver ink printing technology has made great progress in recent years, it still cannot achieve the strong visual impact brought by hot stamping or cold stamping technology.
Selection method
In actual production, should we choose hot stamping technology or cold stamping technology? The answer is: it should be determined according to the specific situation. Hot stamping technology can achieve the best stamping quality and effect, but the cost is higher. Although the quality of cold stamping is also good, it is inferior to hot stamping, but the cost is lower. No matter which stamping technology you use, you should pay attention to both of them, because the price of hot stamping is constantly decreasing, and the quality of cold stamping is constantly improving. Both stamping technologies are in constant progress and development.
When deciding whether to invest in cold stamping technology, printing companies must combine the actual situation of the company and understand the situation of the company's printing press, because the use of cold stamping technology means that a printing unit will be replaced by a cold stamping unit, and a stripping device needs to be installed. If the number of color groups of the printing press is not enough, it may affect the normal printing of the workpiece.
In addition, it is also necessary to determine whether the workpiece is suitable for cold stamping technology. Carefully study the graphics and text to determine whether they can achieve the expected effect after cold stamping. Printing companies can study with UV adhesive suppliers and test cold stamping to provide customers with more choices and improve their ability to serve customers. On the basis of the existing customer base, it can also enhance the company's own competitiveness and the potential to create consumer demand for its customers' products.

Payment Terms︰ TT / LC

Product Image